Popular Mechanics 1920-06: Vol 33 Iss 6

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ne yer’ 5 Cents YW Q POPULAR | 4 MECHANICS ff MAGAZINE WRITTEN SO YOU CAN UNDERSTAND IT

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‘ : . mea ; ~ a FEB | hs ISSUE td BEES | ER _ ‘ | : ; ARE | Ase ms - : fi EWS | EH AH a AAS 30am Vol j ‘9 pe FL Be, ie f A pero Henry Rahe Will Train You to Be Successful in the r Auto, Truck, Tractor and Aviation Business t Learn in 6 to 8 Weeks Earn $150 to $400 a Month! ae I have Four Big Buildings, Vast Equipment— My school is recognized by all large manufac- rye Autos, Trucks, Tractors of all kinds, all latest turers. I have letters of endorsement from motors, 4’s, 6’s, 8’s, 12’s, block mounted. Elec- such factories as Packard, Hudson, Chalmers, tric starting and Ignition Systems of all types. Maxwell, King, Hupmobile, and others. I , Extra large Machine Shop. Vast Live Motor trained thousands of motor mechanics for Department. Plenty of room for individual U.S. Army in 60 days. 30,000 Rahe trained os training under Master Mechanic Instructors. men now numbered among biggest and most N I train with tools—not books. successful men in Automotive Industry. Rahe Autog Sc A / i @ Orractor Choo ni = Rahe trained men owe thet Individual Instruction Au to my method of training I train you under Master Mechanics who show you how to do with tools. any kind of a motor job easiest, quickest and best. You learn Send for Proof. Use this all about Self-Starting and Ignition Systems and do the work een ee a eee over and over again until I know that you have all the work at sone of Uontelhae’ Macon. your finger ends. I have plenty of room and plenty of equip- = ment which insures individual, careful instruction. —=— ON aS Se ee =—=6 i a ae ee Oe SOREN Experience Needed Dept. 2897, Kansas City, Mo. Any man, 16 years and older (white only) can learn complete Tell me how I can learn Motor \ motor mechanics in my school by the Rahe Practical Method. Mechanics quickest and best; send No previous experience needed. No special educational money Sopweaabian showing big requirements. No tools or “extras” to buy. In a few " weeks you are all ready to accept a waiting position or ( .Y to go into business for yourself. Always more calls BRING: 004 66t00e cecceessgentcecseeecses +8 for Rahe Trained Men than I can supply, *» ~ HENRY J. RAHE, Dept. 2897, KANSAS CITY, MO. 2 blocks to your left as you come out of Union Depot. Age..-+.-- OCCUPANION. «+0002 se eeeseeeseceeccceee rv a ee

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Popular Mechanics Magazine 6 N. Michigan Avenue, Chicago, U.S. A. H. H. WINDSOR, EDITOR London: Hachette & Cie, Paris: Hachette & Cie, Melbourne, Australia /6, King William Street, Charing Cross, W.C. 2 111 Rue Reaumur The Australasian News Co. ISSUED MONTHLY SUBSCRIPTION: SINGLE COPY, 25 CENTS In United States, and its possessions, Cuba, Mexico, and Gas per year, postpaid - $3.00 To all other countries in the Postal Union - - - - - 3.50 All subscriptions are discontinued at expiration. Please examine the date ainead on your wrapper. Entered as Second Class Matter Sept. 15, 1903, at the Post Office at Chicago, Illinois, ander Act of March 3rd, 1879, Entered as Second Class Matter at the Post Office Department, Canade. Published monthly by POPULAR MECHANICS CO. Copyright, 1920, by H. H. Winpsor. Copyright in Australie ‘ . Vol. 33 TE for Fins, 1920 No. 6 Accident—Air Mail Plane Collides with Factory Children’s Pages . ee ae 920 Chisemey _\'s00'n'o-00* neh ts is 0006 eabeee ane 826 Chopping Block Made of Steel and Concrete 907 Acci ident—Funnel of Ship Falls on Deck of Lighter 811 Church Service, Sign on Auto Truck Advertises.... 906 Accident—Truck’s Plunge from Bridge Averted uy TR Pe Perey ee 908 Gis Geo cvsapele ddscestatenicéaasecdeeedh tres 894 Clothing History, Paris Museum of ‘Costumes Shows 894 Aeroplane, German, Crashes on American Field. 841 Code, Crane Signal, Reclamation Service Adopts.... 922 Acro lane Hangars, Striped, Identify Landing Field 855 Cofferdam in India Built of Old Track Rails...... 876 Aeroplane Instrument, Rate of Climb Meter New.. 843 Cofferdam Saves Drydocking of Ships......... ... 842 rote lane Toy, Service Station Advertised ne a 886 Coke Concrete, Houses Built of........ 903 Aeroplane, Trim of Checked by Lights on Dial..... 856 Concrete Foundation, Blast without Disturbing Site 862 Aeroplane, World’s Largest, Completed in Germany 890 Concrete Hoisting, Mast Replaces Tower for...... 861 Aeroplanes, Battle, Eight Machine Guns Carried by 843 Concrete Wall Molds Change Shape for Removal. 845 Aeroplanes, Mail Carried in Asbestos Containers by 870 Cotton Mill, Experimenial, Heips Textile Indust: 861 Aeroplanes, Mail, Fitted with Skis for Winter...... 882 Crab, Giant Pacific, Harvesting, by Lawrence Wik. Aeroplanes, Night Flare for Gets Official Test. 852 liam Pedrose ... 877 Aeroplanes, Passenger, American Tourists Charter.. 850 Cricket, Coulee, Warring the, by Horace E, Thomas 899 Aeroplanes, Safety Devices for, to Draw Prizes. 959 Dam, Galvanized Iron, for Irrigation Ditch 912 Agricultural Implement, New, Combined weed Rake Dam, Government Nitrate Plant to be Powered ‘by 904 and Stacker Is .. é 804 Dendrogra h, Service Proves Value of... 864 Air Brake, Train, Automatic Coupling. for. a al 804 Dirigible, nited States “R-38,"’ Sails for England 835 Air Route, Cairo to Cape Town, British Planes Discnarge Papers, Legion Warned against Loss of 836 Follow A PS »haeas > wa 838 Dishwasher, Motor Drives Large Dasher in........ 806 Airdrome, Private, Prepares for Ni ht Flying. ee 867 Door with Fold Forms Warehouse Shelter 871 Airman, Prize for Difficult Feat ight Fi ... 959 Drafting Kit, Comolete, Traveling Case Contains.. 897 Ammonia, Synthetic, High Pressure Method of Drainage Gate, Self-Closing, Water Controls....... 883 Making’ i caacs 1 o.caena en ooh eakieees eek . 851 Drama, Deaf Mutes Play a Gomre@des............ OB Automaton, Musical Skill Displayed by........... 801 Drills, Twist, Holder for is Handy Gauge...... 875 Automobile Bumper Serves as Jack and Lock...... 916 Drydock, Floating, Second Section Launched... 806 Automobile Carryalls, Elaborate, Used for Funerals 818 Drydock, New, Built with Aid of Old Ones tee Automobile Converted into Sled for Use in Alaska.. 885 Electric Plant, Australian Coal Fields to Have . 806 Automobile Dial, Seven Instruments Combined in.. 922 Electricity—New Power Tool Has Many Refinements 881 Automobile Engine Bearings, Machine Burnishes.. 897 Emblem, Danger, National Safety Council Patents. 867 Automobile Engine, Fan Clutch for............... 918 Engine, Boat’s Main, Deck Winch Driven by...... 889 Automobile, Plate and Rollers Added, Runs Machinery 846 Expedition, Arctic, Fishing Schooner to Carry...... 890 Aut mobile Radiator and Engine, Electric Heater for 875 Eyesight, Umusual Method Saves................ 884 Automobile Reaches Bottom of North America..... 892 Ferry Guard Rail, Compressed Air Operates...... 841 Auto nelle Repairs, Collapsible Cradle for. 913 Finger Signal System Proposed for Autoists..... 895 Automobile Rubbing Machine Doubles Hand Output 835 Fire Fighting Tools, Portable, Railroads Use....... 837 Automobile, Theft Alarm Sounds at Moving of. 907 Fliers, American, Prize Contests a Sree . 959 Automobile with Snowplow Attached.............. 879 Floods, Arizona, Cement Bridge Undermined by... 876 Awnings, Eaves on Shop Fronts Keep Dry........ 818 Foliage, Perforation of Plant Roots Augments. . 840 Balance, Small Precision, for Finest Work........ 829 Football, Free for All, Town Plays in River........ 880 Ballistics, Small Arm, Queer Rifle Range Tests. 838 Fort, Border, French Airman Photographs..... .. 885 Balloon, Dragging Anchor, Darkens Eight Towns. 812 Fox Farms, Japan Starts with Canadian Stock.... 826 Band stand, Marble, Moved ‘with Foundation Attached 816 Freight Car Saving, Huge, One Hour a Day Makes 818 Barrel, New, Tumbling, Unloader ee 828 Freight Transfer, New System Simplifies.......... 872 Battleship, Huge Loading Cranes on. caw eaer « 803 Furnace, Gas, Economies Effected by.............. 860 Battleship, ““Maryland,” Launching of..... 912 Furniture, Cement Panels Add Beauty ~ ... 898 Battleships, New, Electrical Propelled Machinery for 886 Games, Olympic, Marathon Course Selected for.... 802 Beans, Odd Machine Cleans... ......scccssscess: 853 Garbage Collection, Horses and Tractor Used for.. 867 Blind, Thousands of Bibles for, Society Prints.. 851 Gas, House Heating with, by Paul H. Woodruff... 819 Bor« ugh, Brooklyn, Improvements Planned for 878 Gas Mains, Fire in Street Caused by....... . 871 ~ ks, Old, Pulverized for Road Making....... 896 Gasoline, Odd Funnel Gives Improved Flow of. 852 3 siding, Brick, Pedestal for Old Frame Residence 881 Gasoline Thief, Motorists Warned against........ 898 lilding, Million Dollar, Firm Erects for Employes 910 Glass, Broken, Insurance Company Pays for....... 886 B rial, Eight Day, of Oriental Performer.......... 840 Glass Cutter, Gas Heated, like Soldering Iron...... 911 Bus, Motor, like De Luxe Street Car. G5 e ss cee ae Gold Mine Shaft Sunk through Garage Floor.. . 874 Canoe, Invention Turns into Sleeping ‘Tent...... 911 Grammar, English, Children See Screen Version of.. 918 Cans, Tin, Houses in Montenegro Built of....... . 895 Grocery, Auto, Housewives Visited by 812 Car rbon Dioxide in Breath Measures Work Done. 815 Guides, Mechanical, Direct Strangers about London 844 ( , Blazing, on Trestle, Fire Fighters a by 854 Hair, Machine Curls by Hot Air Blast.. 815 Cattle Ship Cargo Swims to Shore in Barbados. 893 Hair Waver, Linked Combs Make 3 802 Cement Bags, Empty, New Baler for...... ; 814 Hall, World’s Largest, Paris to Have 913 Chair, Automotive, Easily Operated........ 871 Halyards, Ship’s, Cans along Rails Hold....... 862 iart, Blueprint, Engineer’s Personal Record on. SW Hammer, Three Screwdrivers in Handle of 849 Chickens, Small, Shipped in Cardboard Boxes...... 891 Health, International Commission of, Plans for 878 [Continued on Page 4]

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(4) | Contents—Continued | Heating System, Portable Blower Units for . 913 Smelter Foundation Resembles Gun Base Helmets, German, Pavement Made of .. 836 Spies, Russian, Photo Messages Carried in Eyes by Household Devices . 914 Stadium, Largest, Western epaieeeed Plans, by Ingot Weighs over 100 Tons alettsces 866 Lawrence William Pedrose ‘ Jack Set, Interlocking Base Units Feature of .. 896 Stamp Collection, Greatest, French ‘to Auction Jews in Africa, Old Letters Reveal History of.. . 814 Stamp Series, New, Polish Republic Issues Knife Heater, Electric .. sp ie a 0's aide Statue, Bronze, Boll Weevil Honored by.... Ladder, All Metal Flexible, Novel Construction of.. 922 Stonehenge Guarded against Further Collapse. Ladder, Experiments Determine Best Inclination for 918 Storage Batteries, Automatic Water Filler for.. Languages, Thousand, British Drummers Learn.... 868 Storage Batteries, Electric Oven Softens Top of. Laund:y System, Slate and Numbered Hooks is... 879 Surf Board, Hand Propelled, for Bathers Lighting Plant, Farm, Rotary Sleeve Valve Motor in 838 Swimmer, One Legged, Instructor on ‘Imperator’ Linotype Machine Matrices, Fonts Changed Quickly 854 Tanks, Special Cars Carry from Arsenal to Front Locomotive Plowing Snow, Runs into Swamp.. 830 Taxicab, Three Wheel, Engine Mounted Outside Lumberman, Diving Suit Donned by my ‘Work Telephone, Interior, Has No Mouthpiece.... WOMOUEN BGO Vis 6 50 cswann ses ect snceccdsecvseenens 919 Telephone, Lightning Arrester Saves Trouble on Mangle Cuts Pay Roll of Stocking Mill 889 Telephone Poles Moved While in Use Masks, Germicidal Face, Made for General Use. 844 Telescope (Poem), by Lydia M. D. O'Neil Mattress, Sewing Machine Travels around. 892 Tile, Pipe and Wall, Made of Asbestos and Cement Medal, Atoms and Electrons Paper Wins 959 Town, Portable, Dutch Give to Stricken French Memorial, Georgia’s War, Trees to Form. . 858 Town, Wooden, U. S. Builds for England ; Memorial Theater, Arlington, Nears Completion.... 868 Tractor Courses, College Offers Farmer Boys... Memorial, War, 1,000 Foot Tower to Be.......... 8s2. ‘Tractor Is Wheeled Frame with Auto on #e. Metal Dust, Walls of Factory Bulged by.......... 875 Tractors, Self-Cleaning Wheel for................ Meteors, Apparatus Tracks Flight of..... 830 Trade Fair, British, in Crystal Palace.... FF: Mica, X-Ray Finds Flaws in Quickly.............. 824 Trade-Mark Reform Object of New British Laws. Migration, Jewish, to Palestine Systematic........ 889 460._:«s Traveler Betters Balboa’s Time across Panama. Milker, Single Hose Connection Feature of........ 919 Tricycle, Amphibious, Air Propeller Drives Mills, Textile, Vacuum Machines Sweep Floors of.. 910 Trophy, Air, American Planes to Race for..... Mosquito Breeding Pools, Doctor in Airplane Charts 844 Truck, Dumping, Whole Body Rises and. Tips. Moths, Codling, Ironing Rids Walnut Sacks of.... 858 Truck, Motor, Removable Power Plant Feature of Motor, Four Cylinder Marine, Improvements on. 842 Truck, Repair, Answers Call of Housekeepers Motorboat Is Houseboat and Cruiser....... 917 Tungsten, New Process of Fusing...... Motorcycle, Collapsible Seat for Rear of .. 912 Typewriter, Copyholder Lights and Magnifies Notes Motorcycle Serves as “Shoe Hospital Ambulance”... 907 Umbrella, Improved Form, Easy to Repair Moving Picture Film Factory in Siberia, by Phil Vault, Burial, and Monument Combined Norton eee 887 Violin Bow, Beginner’s, Wire Clamp Holds in Place Moving Picture Studios, Lighting Improvements in 829 Wagon Loader, Automatic, for Difficult Material Moving Pictures—Aeroplane Propeller on Auto Water Heater, Remarkable Gas Control for Makes Breeze for . 906 Water Wave Images, Equipment for Projecting Moving Pictures—Get Altitude Effect by Posing on Welding, Electric, Rivets in Truss Replaced by ST A ES TERR LE Rae 889 Whale Oil, Nickel and Hydrogen Turn into Tallow Moving Pictures, ‘Colored, by “Triple Projection. . 855 Wharf, Bridges and Platforms Add to Canacity of.’ Mower, Golf Course, Small Tractor Pushes........ 853 Wheel, New Measuring, for Accurate Work Mower, Power Driven, Weighs only 125 Pounds... 805 Whistles, Steam, Warn of Prisoners’ Escane Office Building, Four Story, Occupies Small Site... 831 Wolves, New Mexican, Extinction of Near Oil Tanks, Steamship, Portable Force Pump Fills.. 878 Wood Lot, Farm, Seek to Prove Profitable Overcoats, British Army Officers’, Firm Remodels... 870 Zoning System, Chicago to Have.......... Pear, Alligator, Much Valuable Fat in............ 884 intima Phonograph, Portable, Valise is Cabinet of........ 850 Photography, Vertical Enlarging Camera for . 835 SHOP NOTES Pie, Annular Utensil Trims with Single Motion.... 849 , , Plant Growth, Length of Day Determines..... 815 Atomizer Injects Carbon Remover into Cylinders Poles Planted with Combined Tractor and Auger. . 827 Automobile Becomes Locomotive for Railway Popcorn, Life Sized Dummy Clothed in........... 898 Automobile, Rubber Shock Absorber for. Prohibition, Dodging along Mexican Border, by Barrel Support, Shelf Bracket Riles, NNN IN id sacs Sik sx oe + < nie ba 010 0-6rae . B07 Bit for Boring Large Holes... Pulpwood, Alaska’s, Vast Resources of........ . 904 Boilers, Copper, Reinforced Bottom for Pulpwood, Loss in Storage Reaches High Figure.. 846 Booth Has Adjustable Roof. ' Pump, Valveless, Tank Attachment Keeps Primed.. 856 Brazing Flux, Container for. . Pumps, Irrigation, River Motor Like Pendulum Runs 826 Brushes, Artists’, Cover with Vaseline to Keep Rack, ‘Clothing, Foldable for Traveling ; . 919 Carbon, Removing with Wire Brush. . Radio, Congressmen Get Advice by.. 854 Comb, Ruling Paper with.... Railroad Grade Indicator Attaches to Car Window 894 Concrete, Mixing by Gravity : Range Finder, Navigation Made Safer by Using 824 Cutter, Hand, for Thin Washers... Reindeer and Sledge for Summer Travel in Russia.. 874 Drill for Fiber and Soft Metals Rifle Range, Accident Proof... ; .. 960 Droplights, Method of aaane: - River Rouge, Deep Waterway of by Dredging.... 910 File, Round, That will Not Stic Road, Paved on One Side, Dirt on Other... 917 Filter Clarifies Ditch Water................. Read Surfacing Materials, Rolling Disks of Iron Test 846 Fireplace, Hiding in Summer. Rock Drill Cores, Machine Splits for Mineralogist.. 881 Gate, Tile, for Small Dam......... Sands, Singing, New Explanation Offered for...... 892 Gauge, Tire Pressure, Attached to Hose Connection Sanitarium, Compressed Air, Steel Tank Is........ 845 Hammer Handies, Fiber for........ Saw Bench, Motor Driven, Has Tilting Arbor...... 843 Hams, Quick Method of Curing. tear Saw, Portable Band, Fells and Cuts Trees. . 902 Hat, Felt, for Filtering Oil..............- Saws, Largest Circular, Western Lumber Mill to Use 882 Hay, To Prevent Waste of...... “Scarecrow,” Automatic Explosives Make Effective. 848 Hoe, Scuffie, Made from Saw School, New York Sends Young Toilers to.. ... 906 Holder, Tool, High Speed Steel Saved by. Scientists Study Use of Enormous Pressures...... 904 Horn, Hand, Operated by Foot. Semaphores, Low, Railroad Uses.................. 870 Incubator for Raising Bread. . Shield, Isinglass, Street Vender Covers Wares with 873 Lamp, Vacuum, for Acetylene Work. Shivping Aid, Harbor Obstruction Becomes, by Lawn Laid like Carpet ; ais aha I i I le a oe ak acer aa esl amet 833 Lettuce, Head, Rubber Bands for....... Ships Electrically Towed, by A. M. Hofimann.... 864 Liquids, Agitator for Mixing. : Shoe Polish Box, Thousand Dollars for New Gpenee 959 ee 2 ON eae Signs, Roadside, Accident Records Shown ~~ 869 Maul Made from Auto Piston Silo, Old, Farmers Wreck.......... 868 Music, Pockets on Back of Piano for. Silo, Settling, Shovel and Auger Straighten. 862 Opera Glasses Enlarge Drawings Skate, Scow ike, Found in Wall of Old House. - Pencil Pointer, Sandpaper... Skeletons, Flying Reptile, Find Large and Small.. 876 Pincushion on the Sewing Machine. . [Contents Continued on Page 6] 902 59 897 B88 832 831 868 922 940 9 932 933 5 932 ao 34 932 941 929 924 937 929 995 O06 138 937 136 fled

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586 y 873 859 889 916 , 584 nt 919 840 802 05 857 04 318 902 159 897 888 868 Me A + RP Hes Lhe veri a + ae: Popular Mechanics Magazine REGISTERED in U &. PATENT OFFICE WRITTEN SO YOU CAN UNDERSTAND IT Vol. 35 JUNE, 1920 No. 6 Automaton Displays Uncanny Musical Skill M! CHANICAL genius in every age 4 has attempted the construction of igures which simulate the motions of ani- il, and particularly of human, life. And dom has the worker been more suc- Ful American dentist, who, er 16 years, has now put the finishing hes to “Isis,” a puzzling woman of vod and wire, small wheels, and secret The life-size figure, draped in Yriental garb, supports a zither in its lap it reclines on a couch of costly wood. ym the couch bottom many wires are en to lead to a mass of delicate machin- in a box below. The automaton displays its greatest kill, of course, in playing upon the zither 1 its lap. In response to the human rice, or to the proper string of the piano, im al ‘ 5 en aaa A LLL LOLA INTERNATIONAL FHLM SERVICE it plays any one of 63 familiar composi- tions. Both hands pluck the strings, the right carrying the melody, while the left accompanies with the chords. No ex- planation of this eerie performance is of- fered; inspection of the figure’s head, however, shows it to contain many disks, probably the source of Isis’ repertoire, scores of horseshoe magnets, a compass, ind other mysterious parts. Another of Isis’ tricks, less astounding, and _per- formed when the room grows unduly warm, is the removal of the long face veil. This is done, in response to the action of a thermostat, by a single mo- tion of the right hand. At two o'clock every morning, in addition, with much whirring of clockwork. Isis readjusts her- self for the tasks of the coming day. . Upon the Zither in Her Lap Isis, the Musical Automaton, Plays Any One of 63 Famil- iar Compositions at a Word of Command. The Right Hand Carries the Air, the Left Strikes the Chords. The Inventor, Seen be- hind His Mystifying Creation, Naturally Declines to Explain the Mechanism That Gives Isis Her Astounding Powers

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802 POPULAR MECHANICS WOMEN’S HAIR WAVER MADE OF LINKED COMBS My lady may now give her tresses a “water wave” quickly and with profes- sional skill by means of a new and in- ~ a ~ 7 The Tresses are Seen at Left and Right before and after the Use of the As the Six Combs pic stadium, the finish are Pressed Together, the Links Move Alternate Combs Sidewise . Combs. The Middle Picture Explains the Action. genious hair-dressing implement. It con- sists of six rounded combs, held parallel by small metal links. Before using the combs, the hair is thoroughly dampened. The six combs are then placed against the head, and pushed together. Because of the link connections, this action moves alternate combs sidewise, so waving the hair. When the hair is dry, the combs are removed, and the waves remain. PROJECT WATER-WAVE IMAGES WITH SIMPLE EQUIPMENT Holding that simplicity is always an advantage in demonstrating the phenom- ena of physics, a profes- sor in a Kentucky col- lege has devised an effective method of showing water-wave for- mation with ordinary equipment. A_ project- ing lantern is arranged for vertical work, and a 5-in. flat-bottom glass evaporating dish is placed in its field. For producing the_ vibra- tions, the, point of a steel spring is adjusted to touch the surface of Turning the Large Rotates the Propeller of This Newest Sporting Craft. The Rudder He Controls by Means of a Lateral Tiller, ’against Which He Presses His Feet liquid in the dish. A half- inch of distilled water may be used, but alcohol shows a much slower propagation of waves. Experi- ments of reflection and refraction as well as wave formation may be performed with this apparatus. A mirror will ‘make any lantern a vertical projector. OFFICIALS SELECT COURSE FOR OLYMPIC MARATHON The course for the Marathon, chief event of the coming Olympic games, has been officially selected. The Start, set tor acai August 21 or 23, will b: made from the royal pal ace at Laeken, just out side of Brussels. A lit tle-used road in the pal ace grounds will soo bring the runners to brick-paved highway running north and sout! Flat as a table top, an with few turns, this road will take them to Ant werp, 26 miles to th north. Here, before thx thousands in the Olym SB \ will be made. The vil lages along the route are all quite small and will be easily policed. LITTLE SUBSURFACE CRAFT PROPELLED BY HAND CRANK A name is hard to find for the ‘newest water craft, recently invented for use at bathing beaches. Perhaps it will be known as the hand-propelled surf board. At any rate, it consists in the main of a single, boatlike float about 5 ft. 6 in. long. On this float the bather lies at full length, his weight submerging it. Beneath the forward end of the float is suspended a large vertical gear, with crank hand Gear at Comfortable Speed, the Bather Rapidly for the bather’s hands. Meshing with the gear is a small pinion on the end of the propeller shaft. Propeller and foot-con- trolled rudder are carried at the stern. It will be observed that the propelling ele- ments serve also as a stabilizing keel. - ! ae

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HUGE LOADING CRANES ON ELECTRIC BATTLESHIP a ee ad ol ule: ry WAVY FF PHOTO AMONG the unusual features of the new electric battleship ‘“‘New Mexico,”” flagship of the United States Pacific fleet, are its two huge motor-driven cranes, one of which is seen at close range in the picture. These great machines, each with a capacity of 4,000 lb., are used for loading and unloading equipment and supplies, for raising and lowering small boats, and for hoisting seaplanes aboard when they alight beside the ship. The powerful crane motors are not driven from the propelling generators, but from a set of six 400-hp. turbo generators that supply all the auxiliary equipment

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804 POPULAR MECHANICS IMPROVED FORM OF UMBRELLA IS EASILY REPAIRED Mechanically simple as an umbrella is, it must generally be taken all apart to repair a broken rib or stretcher, and the task is be- yond most owners. A Brooklyn in- ventor has improved up- on the usual f construction Ms by inserting the end of each rib and ; stretcher be- - tween a pair of metal ears on the notch and runner members, using a short wire with bent ends for the pivot. These wire fasten- ings are easily removed or replaced with- out interfering with any other part, and if. one is broken or lost, the rib or stretcher is held by a flange so that it cannot become loose and do damage to the cover. TRAIN PIPE FOR AIR BRAKE HAS AUTOMATIC COUPLING While the automatic coupler for rail- road trains has become standard car equipment, connecting the hose for air- brake and steam lines is still a hand oper- ation. This results, especially im cold weather, not only in poor joints and some hazard to the operator, but also in short- lived hose, because of the practice of al- lowing the separating cars.to pull the coupling apart. A west-coast inventor has supplied a cure for this condition in the shape of an automatic connector, which brings the hose terminals togethe: in an air-tight joint when the cars ar coupled, and breaks the joint as quickly when they are separated. The hose on each car ends in a rubber gasket in a vertical plate, hung on a bracket below th: car coupler. Curved guide fins cause the two opposing plates to engage each other accurately and solidly under all condi tions, even if the coupling is made on curve. Each plate is supported by a uni versal-joint and _ spiral-spring arrang¢ ment, permitting any amount of surging without affecting the joint. The device, which has met severe tests, assures a con- tinuous air-brake connection, and is de- clared to eliminate many serious troubles experienced with the old-style connector HAY RAKE AND STACKER UNITE IN NEW FARMING MACHINE For the farmer with extensive hay lands there is now made a machine that is both a rake and a stacker. The teeth oi the machine are carried by two long arms which are pivoted to a rather elaborat« wooden framework. When the machine is used as a rake, these teeth are held close to the ground while the team forces them under the windrows. To elevate a load of hay so gathered, the driver pulls a lever. At this, the forward motion of the machine winds a cable on a drum, and raises the load high in the air. In this position it is carried to the stack, up- Automatic Coupling for Air-Brake Pipe: Left, the Connector below the Car Copiers Center, the Couplings of Two Cars Connected; Right, a Broken Hose Connector of ld Style me

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ae pape POPULAR | The Newest Farm Ma- ’ chine is Seen Above in Raking Position. Single- trees Are at the Rear MECHANICS 805 The Combination Rake and Stacker has Raised Its Load to Dumping Position. The Movement of a Lever near the Driver's Seat will Drop the Hay upon the Stack. The Teeth were Elevated by the Forward Motion of the Team, This Energy Winding an Elevating Cable on a Windlass Drum on which it is dropped as a second lever is pulled. Using this combination machine, he farmer can rake and stack his hay ithout assistance. More generally, how- the combination machine will be used with a number of ordinary buck rake These will colleet the hay, and lrop it without delay within 100 ft., or so, the stack The combination machin collect these accumulations, ratse em, and dump them on the stack. POWER-DRIVEN LAWN MOWER WEIGHS ONLY 125 POUNDS By eliminating all unnecessary parts ind by cleverly simplifying -the action me manufacturer of lawn mowers is now ible to produce a 125-lb. power machine that may be guided, like a hand machine, iround trees and shrubs,sealong steep ter- race slopes, or almost anywhere, in fact, i man can walk. The '%-hp., one-cylin- ler, two-cycle engine is mounted above the 24-in. cutting reel, which it drives by means of a chain and sprocket. The ends rf the cutting-reel shaft are covered with fiber, so becoming friction rollers. By a juarter turn of the handle these rollers re put into and out of contact with the ‘es of the supporting wheels. By virtue of this arrangement, the machine 1s al- ways under perfect control; when de- sired, for example, the machine may be nished by hand alone. Between the en- gine and the cutting reel is placed a fric- The Cutting Reel of This Lawn Mower, Which Weighs Only 125 Pounds, is Turned by the Little Gas Engine. The Mower Wheels are Driven by the Ends of the Reel Shaft tion release that automatically slips when i stone or stick snags the whirling blades. Dry batteries supply current for ignition

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806 MOTOR DRIVES LARGE DASHER IN NEWEST DISHWASHER The latest mechanical dishwasher for the home is a substantial, boxlike affair which is raised by its iron legs to about This Cut-Away View of the Dishwashing Machine Shows the Dasher in Its Depression beneath the Dish Tray | SE = —— — the height of the kitchen sink. When the hinged cover of the metal box, or tank, is lifted back, a wire tray is seen on the box bottom. Inthe various compartments of this tray the dirty dishes are placed. Beneath the tray is a conical depression which holds about eight quarts of water, and in which revolves the large dasher. An electric motor beneath the box turns the dasher through gears, and so throws the water against the dishes. POPULAR MECHANICS AUSTRALIA TO HAVE ELECTRIC PLANT ON COAL FIELDS The modern method of building an electric-generating plant directly over a coal supply, and transmitting energy in- stead of fuel to the point of consumption, is to be employed by the state of Victoria Australia, for supplying the city of Mel bourne. The field of brown coal to be used immediately is at Morwell, 80 miles away, and is accessible by open cutting. Ther is, it is estimated, 20,000,000,000 tons it the district, and between 120,000,000 and 150,000,000 tons in one square mile, enough to generate 100,000 kw. for 150 years. A 40,000 to 50,000-kw. station will be built first, which will*be sufficient for three years, but later the development will be extended, and finally include the utilization of the Kiewa River and othe: water powers. SECOND SECTION OF BIG NEW FLOATING DRY DOCK LAUNCHED A large floating dry dock, which when completed will compare favorably for siz« with any other dock in this country or abroad, will soon be at the service of vessels, large and small, which ply the Gulf of Mexico. In the yards at Pensa- cola, Fla., the great structure is being built in sections, two of which have al- ready been completed. Each is about 40 ft. long and is built almost entirely of wood. The second section slid from the ways a few weeks ago, and is now re- ceiving its finishing touches as work is started on the third. The Photographer has Caught the Second Section of the New Floating Dry Dock Just as It Hit the Water at Its Launching. This Is Only One of Several Sections That will Compose the Completed Dock. It will Be Able to Lift the Largest of the Vessels That Ply the Gulf

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» View across the Border from Calexico, California: The Transcon- This Is in Mexicali, Mexico ental Trains Stop Just across the Street. DODGING PROHIBITION ALONG THE MEXICAN BORDER By JOHN EDWIN HOGG | N these bone-dry times it is still possible to buy a drink of old-fashioned high- tage hquor—and without violating the istead act either! At least this is true ing the Mexican boundary where the genuity of thirsty Americans has been taking advantage of a few loopholes in he law through which the hard stuff freely flows. If one is thirsty and takes a rip to the Pacific coast, it is only neces- ry to buy a ticket over the newest of transcontinental railroads—and ride buffet car part of the way. Then, purely a matter of engineering to avoid certain top- ogra phic al ob- The Revenue Officer Is on we , the Job Every Place the stacles within the Transcontinental Trains continental limits Stop South of the Inter- . national Border of our own nation, but it must be admitted that the oasi feature of its passenger service is high] attractive to a multitude of American: who are not in favor of prohibition. Of course, bringing liquor out of Mexico use in the United for future 0, the train makes stops at convenient States is contrary to law, but Americans nts along the who are thirsty are ite where pas- likewise ingenious. ngers may step \n American cus- and put one tom officer travel on a brass rail with every tran exchange Amer- continental train n.-money for any below the border of wet goods and when the train be found in a makes its last stoy stocked Amer- in Mexico, he is o1 can cellar. This the job to look out railroad dips into for violations of Mexico in two dif- the prohibitio: ferent places, and laws. But, of the buffet car, Ee man. course, where ther: : hich travels in @ Favorite Method of Bringing “Wet Goods” across '5 only one office: ond through the the Line: One Day the Border Officials Got Suspi- and perhaps severa United States, is $outnd Looked ander « Pullman Gar on One,et ths hundred passenger: t ‘ y Foun open for business to be watched, a as soon as the southern boundary is certain amount of booze is bound to passed. Obviously this route is fast gain trickle over the line. A _ favorite pas ing in popularity, so much so in fact that multisection trains are necessary to ac- commodate the crowds. The construc- tion of the road over Mexican soil was sengers’ method that has thus far defied the vigilance of the Federal authorities is that of railroading the stuff with the aid of a Mexican accomplice. There are 8117

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SOS POPULAR usually a lot of poverty-stricken peons hanging around the Mexican railroad stations to whom Uncle Sam’s dollars talk loud When the revenue back is with a voice. officer's turned a tourist passes a prece of money to one \| Mexi- ' Cavs. The “3B \Mlexican says, 3 ‘Si, Senor,” Sire ind disappears. § As the train is about to. start he hangs a jug rr bottle inside the trucks of a Pullman car, or otherwise ceals it the train. careful that see him put it train stops at some way station in United States, perhaps well over into \rizona or Texas, and far from the gaze of border officials, the passenger steps out. He knows where to look for the jug, and then a little party : is put on in the Pullman smoker. Then, too, pints and half pints fit very nicely into Pullman car ot the © & ~ in <* con- about Che the course, is 1 not aOes when the the Mexican, of custom othcer there. Later

tclalliraciey Liquor Sucked across the Border through a Straw or Rubber Tube is Not Imported in Violation of the Prohibition Laws, According to the Ruling of One of Our Highest Courts For Hundreds of Miles There Is Little or No Fence Separating Mexico and the United States. »n American Soil as Long as He Could,- Drinking from Bottles to Held in Mexican Hands South of the International Line MECHANICS water coolers, ventilators, and other nu- merous hiding places about the average transcontinental train, and even if a cus- tom officer happens to find them it is rather difficult to say just who put them there. That hot-water bottles and ice bags are also handy prohibi tion-dodging containers is in- dicated by the fact that drug gists in the bor- der towns de- clare they are longer able keep this kind of goods in stock. The demand simply exceeds the supply, they say. Prohibition is the least of the worrie of Americans living along the Mexican border. Passports are required before one is permitted to cross the line, but they are issued to American citizens with almost any legitimate reason for going across, short of being thirsty. Once a passport is obtained, the bearer may travel back and forth according to his own fancy. But aliens and others who are un able to procure passports, or those who do not wish to go to the trouble of secur ing one, may buy a drink or a thousand drinks, without violating the law and with both feet on American soil, by more ways than one! He has but to sally up to one of the fences that separate the United States and Mexico. The government has erected heavy barbed-wire structures on the line at all the ports of entry, but they do not completely close the border by any means. There are many hundreds of miles where the international boundary is marked only by a concrete monument every 10 miles and some stretches as much as 200 miles in length are entirely unguarded, The fences are painted a brilliant red, and are distinctly placarded with signs written in English on the American side and in Spanish-on the Mexican side. The thirsty traveler who goes to the fence for a drink has but to catch the eye of the Mexican vender, who is usually on the lookout for a chance to transact business. The \merican passes a piece of money through the fence and “Agua fuego, vino blanco, mescal, tequilla,’ or whateve: brand of thirst quencher suits his fancy. The Mexican produces the desired bottle, The Thirsty American Stood no Says,

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POPULAR MECHANICS Where the Corks Begin to Pop: The Fence Separating the United States and Mexico, and beyond Which Point the Buffet Cars of the Transcontinental Railroad, Traveling in Bond in Z United States Territory, Are Open for Business lds it close to the fence, and hands \merican a straw. The straw is again ed through the fence, but this time end that is in Mexico goes into the of the bottle, and the end that is the United States goes into the Ameri- ‘s mouth. The rules of the game are it the American shales before go- into action, hen he shuts his es and sucks up much liquor as is able to swal- low without taking 1.other_ breath. for sanitary rea- ms many Ameri- carry their n rubber tubes this form of rohibition dodg- sense of the ridiculous when he sees a Mexican selling eggs through the inter- national fence, and several grown-up men standing on the American side—sucking them! As a matter of fact, the eggs are only shells, the contents of “which have been removed and replaced with whisky, gin, wine, or other varieties of alco- holic cheer. The eggshells, after be- ing filled with liquor, are _ sealed with parafhin, and the dry customer after buying one has only to pick off the seal and help himself to the thirst - quenching contents. Others } \ but the Mexi- ns limit the size hat may be used to one-eighth of an inch interior diam- eter. Otherwise some with abnor- mal drought and a sense of shrewd bargaining would be showing up at the fence _ with pieces of garden hose. The tourist is impressed first-time usually with a The Mexican Stands on Mexican Soil and Hands the “Eggs” through the Fence. The Americans Pick Off the Paraffin Seals and Suck the Contents, Which may Be Whisky, Gin, Wine, or Almost Any Alcoholic Beverage That the “Dry” Customer’s Fancy may Happen to Dictate may be seen drink ing out of bottles jugs, or demijohns The ve ssel > are held in willing Mexican hands on the Mexican sid¢ of the border, but the drinks flow be tween ‘thirsty lips in prohibition terri- tory. Under pres- ent statutes, there is nothing illegal about this border- fence liquor traffic. One of our highest courts has ruled

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POPULAR Left: New River from The Bullet-Proof Boiler-Steel Container That Drifted down the Mexico into the United States, and from Which the Border Officials Removed 240 Pints of Bonded Bourbon. Right: A Sharpshooter Guard is Posted on the Bridge over the New River with Instructions to “Pick Of" Any Jugs or Bottles Floating into the United States that liquor thus dis- pensed is not actually imported, and that the law does not apply to a drink brought into the United States through a straw or rubber tube, poured through a bottle or jug neck, or in any container as fragile as an eggshell when it is in no way packed or prepared for shipment. Floating liquor into the United States in streams that flow out of Mexico is another eva- sion of the prohibition MECHANICS law which the officials have not yet succeed ed in stopping. The first instances of this on the Mexican border were observed in the New River, near Calexico Calif., recently, where the river crosses the in- ternational fence. The attention of the border officials was first at tracted to this phase of the trafic by a sour smell that wafted up to the Calexico customhouse from the direction of the river. Some of the men had smelled that smell before. so they followed the scent, and proceeded to investigate. In the river they found a bar- rel of “nose paint” that had floated down the “*We came to a river and couldn’t get across.”’ This Time-Honored Drinking Song Is a Stern Reality to Thirsty Americans Crossing the Tia Juana River to Tia Juana, Lower California. It Is So Much So That the Mexicans have Bonded Themselves to Build a Bridge ———ap A Brand-New Industry That has Grown Up within the Shadow of American Prohibition: This Is a Bottling Plant Which was Recently Installed at Mexicali, and Lies within Some 50 Feet of the International Boundary Line river with a lot of drift wood and débris. A jam had formed, crushing the barrel and. sending its fiery contents into Cali fornia to irrigate the cot ton fields. Later an American was observed in conversation with a Mexican through the barbed-wire structure Then the Mexican went away, and was seen a moment later walking over a tiny footbridge that crosses the river a few feet south of the boundary. He carried a

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POPULAR MECHANICS demijohn under one arm. Halfway over the bridge the Mexican _ stumbled, sprawled full length, and the demijohn went into the river. It bobbed along with the current, floated under the fence, and was promptly fished out by the American, who put it in his automobile and. drove away. A few days later so many jugs, demijohns, and bottles came floating down the stream that the officials grew uspicious. A sharpshooter guard was placed on the bridge, on the American ide of the line, and instructed to “pick ’ anything that looked like a liquor ontainer floating in the stream. Con- iderable ammunition was burned up dur- the next few days, ard then the vessels ceased to come. The guard, how- er, remained on the bridge, and spot- hts were arranged to illuminate the vater at night. About a week after the jug had been shattered, the guard espied something that looked like a bar- rel floating down the river. He banged away at it. The bullet struck its mark, but only bounced off with a peculiar me- ) 1 llic ring. A shower of bullets produced better result. Eventually the noc- turnal derelict was lariated and hauled ishore, and 240 pints of whisky were re- moved from the bullet-proof boiler-stee! container. Meanwhile hundreds of other treams flow out of Mexico—unguarded. Miles and miles of the border are_unpa- trolled, and thirsty Americans are think- ing up new schemes for getting a drink eee eee See ap Sots Bem: Be out of Mexico. Exorbitant Rates are Charged FUNNEL OF STEAMSHIP FALLS ON DECK OF LIGHTER few accidents can be called fortunate. quences of a mishap are so trivial, com- Sometimes, however, the actual conse- pared with possible results, that the tern is appropriate. An ex- emplification of the latter assertion occurred in an eastern harbor recently, when the smokestack of a large steamer was be- ing removed by a lighter derrick. As the big pipe was swung clear of the ship, the crane began to sway. One of the slings parted a moment later, and the funnel crashed to the deck of the barge. Strangely, no one was killed or injured, and —— —_ only slight damage was A Fortunate Accident: The Picture was Taken Soon After the Steamship done to the stack and the Funnel fell-from the Derrick to the Deck of the Lighter, Which can be Seen near the Center of the Illustration. The Accident was Caused by lighter. The stack was the Breaking of One of the Slings That Held the Funnel repaired and replaced

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POPULAR pISTRIBUT! 816 SAVING TO THE MOUSE WIFE. CUTS H.C.L. REASONS Why Phas; " a! if MECHANICS Market Basket on Arm, the Housewife is About to Step into the Interior of the Traveling Store. Standardized Trucks are Now being Distributed to His Own Territory, the Apportionment being Made AUTO GROCERY STORE COMES TO HOUSEWIFE’S DOOR These Big Operators throughout the Country. Each will Cover on the Basis of One Truck to Every 5,000 Inhabitants BALLOON DRAGGING ANCHOR DARKENS EIGHT TOWNS The standardized traveling stores re- The city of Hudson, in northwestern cently seen on the streets of many com- Wisconsin, with several smaller town munities in the near by, went middle West without electri represent one of current for sev the most prom- eral days re ising of the cently because many attempts an army balloo: now being made set out from to force down Fort Sill, Okla the price of to better th foodstuffs. The distance - flight big trucks are record. Shortly being sold by a after it crossed central corpora- the Minnesota tion to opera- Wisconsin lin tors throughout it seems, valve the country. trouble forced Paying nothing — the balloon to a for rent, heat A Surprisingly Large Stock of Groceries is Found on the Shelves low altituds and light, and of the weer Gis Peas aie Her- Dragging for a little for the few moment, t h e essentials, these operators can afford to sell meat and groceries at close to whole- sale price. The convenience of the serv- ice recommends it to the housewife, too. Advised by its motor-driven horn that the “store” at her door, she sallies forth with her market basket. She enters by means of a door beside the driver’s seat, and finds herself in a well-lit interior lined with crowded shelves and ice boxes. She helps herself, and pays on her way is It. anchor line encountered the transmissior wires that distribute current to the towns of the vicinity. A short circuit was th result. As every light in the eight town was extinguished, the overloaded genera tors in the central powerhouse burned out. Meanwhile, the four army officers sailed on. In a few hours they landed packed up their balloon, and bore it to Hudson. Arriving at 8:00 p.m., they found the city lit by candles and kerosene lamp =

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POPULAR MECHANICS 813 AIR PROPELLER DRIVES AMPHIBIOUS SPEEDSTER Seven years’ enthusiastic experiment by craft can one inventor with all forms of the aerial propeller has lately borne fruit in two interesting lit- tle vehicles. The first is an imph ibious craft that dil- fers from make 60 miles an hour on a smooth road, and continue at 15 miles an hour on encountering a stream or lake. ; en The second vehicle is for use on land only, but like the first is no table for its trimness of de- sign. . It is like- wise a tricycle, the front wheel responding to

others of its | kind in its 11) «lilil ess Oo i nd high ed on both

land and water the steering e body. or wheel, and the hull, is about two rear F 12 ft. long, and wheels bearing ssely resem the power unit ble a small The_ two-cyl flat - bottomed inder engine motorboat. turns a queer | he cockpit double _ pro eats one, and 4... E poe . ~ peller, made of ‘ This View ot the Speedster Shows the Aerial Propeller, and the = rie provided Two Rear Wheels, with Their Hinged Mountings. The Top two singiec- with fuel tank Speed Is 60 Miles an Hour over City Pavements, or 15 Miles stick props ” ; an Hour in the Water . itor centrols fixed to the i same shaft at a small angle to each other. \ll moving parts are inclosed by a protec- ports the front of the body, and is con tive cage. trolled by the steering wheel. The rear, The or stern, is supported by two wheels, both on hinged mountings by which they may be swung clear of the water. The pro- ulsive unit is bolted to the stern, and _ tor’s success with this sec- sists of a two-cylinder motorcycle en- ond vehicle has prompted ind a geared-down propeller. With him to undertake a ngine developing full power, the little larger work He steering wheel. . Rear of the Single Seat ~—— ny a bea - ~ -

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POPULAR MECHANICS The Propeller-Driven Tricycle is Shown in Rear View, at the Left. The Power Plant is Seen to Be a Twin- Cylinder Motorcycle Engine. Single Shaft. geing to experimeit next with a propel- ler-driven carryall for use in summer re- This big machine will carry ten dozen passengers in the space be- tween the driver's seat and the propeller, ind will probably be powered with a high- speed airplane engine. sorts, ora EMPTY CEMENT BAGS BALED EASILY BY NEW MACHINE Labor-saving machines are especially welcome when the hand operation they displace 1s disagreeable and cannot be satisfactorily performed. The baling of empty cement and plaster bags, to be sent Left, Stacking the Empty } |-Bags; Right, Compressing Them with the Lever Left, the Handle Locked Down While the Bale of Bags is Wired; Right, Removing the Finished Bale for Shipment In the Side View is Explained the Mounting of the Two Propellers on the The Driver Sits upon a Comfortable Motorcycle Saddle, with His Feet on the Pedal Contro! back for a rebate. is just such a task, bu with a new and simple machine it is a complished without trouble, ‘and th: bales are solid and durable. The bag to the number of 50, are stacked on a small bench, between three curved arms. Then a lever at the side i operated, and the arms close in on the bags, compressing them tightly and bringing wires around the bundle. The wires are quickly twisted with pliers, th lever released, and the bale is complete palrs Oo} h HISTORY OF JEWS IN AFRICA REVEALED BY OLD LETTERS Recent discovery by a French librarian number of letters written in 1447 throw an astonishing light on the hitherto unknown part played by Africa in the his tory of the Middle Ages. These ancient documents show that the country fron Algeria to the Niger River, between the \tlantic coast and the Sahara Desert, wa a region of vast riches and thriving in- dustry, dotted with Jewish trading posts. So well established were these now for- gotten centers of trade that they were listed in an atlas prepared as early as the 1370's. Gold dust and rock salt were the chief commodities, in exchange for which the Jewish traders offered wheat and bar- ley. One ancient town, Teghazza, built of rock salt, was assured structural per manency by the utter lack of rain. An oasis called Touat contained between 150 and 200 wealthy villages. The cattle marketed in season numbered half a mil lion, and commission merchants de manded 100-per-cent profits in their tran actions, ot a @ More than 18,500,000 baby trout and 12,300,000 baby salmon from the state fish hatcheries were distributed in the stream of California last season

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POPULAR MECHANICS 815 LENGTH OF DAY, NOT SEASON, is neta wore the ae .~ air 7 fur- nished by a motor-driven fan with gas- DETERMINES PLANT GROWTH burner attachment. When my lady takes Chat the development and evolution of the treatment, her hair is wound, a lock plant life is dependent upon the number at a time, around ordinary curlers. These ff hours of light in a day, rather than are then enveloped by metal tubes, at- upon the temperature changes of the seasons, 9 8a 08 8 eS SHEENS EERE TUEES ? is the — — 3 mtr Pir yt si erie Zz ‘ 1 ac > ro Fo ‘ ion just reached by gov * . . ~ ( q ernment scientists. Ex- , bretaeeon ht ,. periments on a number ye ee rt ae of greenhouse _ plants ~~) mrs demonstrate that artifi- eT cial lengthening of the light of day greatly ac- celerates the flowering ind fruiting stage, while hortening the light period by morning and afternoon darkening re- tards the process, even to the point where that - COPYRIGHT, UNDERWOOO 4 UNDERWOOD tage 1s never reached. The Three Young Women in the Middle are Demonstrating the Process [ris plants given 18 Which Changes the Straight, Unlovely Tresses at the Right into os : y the Permanently Waved Coiffure at the Left hours of light in the 24, bloomed two months earlier than their tached to the hot-air outlets. The result- neighbors under natural light, in the same ing “waves” are said to be permanent. temperature. This discovery is expected —— to furnish a key to many difficult crop CARBON DIOXIDE IN BREATH problems. Even the migration of birds is thought to be affected by the same MEASURES WORK DONE principle. The amount of muscular energy ex- pended in performing any task is accu- ELABORATE MACHINE CURLS rately indicated by the proportion of cat HAIR BY HOT-AIR BLAST oon: = in the breath | At an exhibition recently given in New before and York City by a hairdressers’ association after the ef here was demonstrated a hair-curling ma- fort. To dem *-hine which excited comment because of onstrate this at its novel appearance and operation. It fact, and af onsists primarily of a hot-air blower, ford an easy vith 52 outlets arranged in a frame that means _ for N = , = measuring human en- ergy, a Lon don _ scientist arranges an air-tight bag with a valve and mouthpiece, into which the subject breathes. It is then a simple matter to analyze the air in the bag, and ~ ascertain its carbon-dioxide content. @In order for a vessel to obtain her bear- ings by radio when off the American coast, it will be necessary to call the U. S. Naval radio compass stations with wave — = lengths of 800 meters. The naval sta- OP YRIGHT, UNDERWOOD & UNDERWOOD : > ~ — ¢ . . ‘ . ceive and send these mes- The Blower at the Left Sends Hot Air through the trons now re — ba ; a d —— these . Metal Tubes. Each of These Envelops a Curler sages only with waves of that length.

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516 POPULAR MECHANICS BODY RISES AND TIPS IN NEW DUMPING TRUCK Instead of raising merely the front of motor-truck equipment lifts the whok the body, a new form of body by hydraulic hoist to a predete: mined height, and then raises the front still higher to dump the load. Two set of heavy crossed beams, one attached to the front of the body and the rear of the chassis, and the other to the rear of the body and the front of | the chassis, like the legs of a folding chair, ac complish the lifting feat The attachment is mad to give an elevation at the tailgate of 7% to 8 ft., with a load of six tons or more. The truck so equipped is at a par ticular advantage in dumping into high chutes or bins. The body may be inclined at a suf ficient angle to dis The System of Crossed Beams under the Body of the Truck Permits the rer ‘ oe Hydraulic Hoist to Raise the Whole Body toa Considerable Height, harge a load of wet and and Then Dump It by Lifting the Front Still Higher adhesive material. WIRE CLAMP HOLDS BEGINNER’S MARBLE STRUCTURE IS MOVED VIOLIN BOW IN PLACE WITH FOUNDATION ATTACHED A small wire clamp, of recent invention, Only one thing was overlooked when, corrects the beginner’s tendency to. let last summer, a stagelike marble band his bow stray away from the bridge of stand was placed in one of Chicago’s his violin, and toward his fingers. The lakeside parks. This was the fact that clamp is placed over the strings at the the sun always sets in the west. As th« end of the fingerboard, with its extremi- stage faced west, it was soon found that ties pressing against the sides of the vio- afternoon concerts were out of the ques lin. Just above the strings, in this posi- tion. The sun shone straight in the eyes tion, the clamp is arched and covered of the musicians. So the donor gener with rubber. The bow encounters this ously offered to move the structure. H: arch when it slides from its correct posi- consulted house-moving contractors; all tion near the bridge of the instrument. were ready to move the edifice, provided they were allowed to cut it loose from its seven-foot foundation of reinforced concrete. But such treatment, it was felt, would destroy the marble superstructure The contract went, at last, to a contrac tor who promised to move foundation and all. So during the winter months the foun dations were laid bare. Wintry blizzards, and seapage water from the lake, near by, made the work difficult, but were not allowed to stop it. In tunnels, dug be- neath the foundation line, were placed heavy jacks. When, at last, many of these were in position, a man was as- signed to each. At a word of command the mass of 300 tons rose from its bed. The Wire Clamp Halts the Student’s Bow as It Strays acki s ing re ried toward the Fingerboard. The Clamp has been J acking and shoring were then car Removed from the Violin, at the Upper Right forward until the ground level was

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3 ae fhe Bandstand Is a Monumental Structure of Marble, Based on a Foundation of Reinforced Con- crete. Symbolic Groups Adorn the Pediments to Right and Left. Foundation Intact, the Band. stand is Starting, Here, on the = Journey to the New Location The Above Photograph Sug gests Rather Faintly the Mass of Timbering That Filled the Deep Hole in the Foreground. o Enable the Foundations to Clear the Sides of the Pit, the Struc- ture Had to be Raised Many Feet above Its Original Level Anchored to Uprights Sunk into the Pavement of the Boulevard, the Tackle has been Used to Turn the Bandstand through a Right Angle in Order That the Sun may Not Shine in the Eyes of the Musicians. he Foundation was Left Attached Because It was Feared That Separation would Destroy the Marble Superstructure

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sis cleared by several feet. The bandstand was then rolled out upon an adjacent boulevard, turned through 90°, and pulled to new position, about 75 yards to the south. EAVES ON SHOP FRONTS KEEP AWNINGS DRY DURING RAIN The awnings before many of the small shops in San Diego’s Chinatown are now protected by eaves, or little shedlike struc- Qn All the Shop Fronts along This Street in San Diego’s Chinatown are seen the Curious Eaves That Keep Rainwater Out of the Retracted Awnings tures, fixed to the shop fronts, and usually about 12 in. wide. Their function, of course, is to keep water out of the folds of the retracted awnings during rain- storms. In comsequence, no water ac- cumulates during a storm, to be dumped on the head of a passer-by when the awn- ing is lowered. Awnings protected in this way, naturally bleach and rot more slowly. POPULAR MECHANICS ONE-HOUR GAIN A DAY MAKES HUGE FREIGHT-CAR SAVING If one hour could be saved, every day in loading, unloading, or moving eac! freight car in the country, more tha: 102,000 cars would be added to the avail able capacity. There are approximate! 2,452,000 cars, which average 11.29 pe: cent of their time in loading, the sam: in unloading, 68.39 per cent wasted in lays, repairs, and switching operation: and only 9.03 per cent in moving trains Thus each car promptly released and kept moving helps to reduce shipping expens and the cost of living. ELABORATE. AUTO CARRYALLS USED AS FUNERAL CARS A funeral-car company in an eastern city has recently increased the number of its automobile carryalls to six by the ad dition of several cars of unusual com pleteness. Each cost $12,000, and is car ried on rubber-tired wheels beneath a standard 34-ton chassis. The long body is strongly built, but weighs little, as all outside panels are aluminum. A separate door gives admittance to the casket and flower rack; another to the mahogany trimmed interior. Forty passengers ar: seated here on leather-upholstered chairs The wide windows are provided with roller curtains and silk side drapes, Ele« tric lights, and small heaters for cold weather use, complete the fittings. Th« wheel base of each car is 15 feet 6 inches — — Several Funeral Cars like the One Above Are Now in Service in an Eastern City. The Door near the Rear Wheel Admits to the Luxuriously Furnished Interior, Where Leather-Uphelstered Chairs are Provided for 40 Persons. A Second Door, near the Front, Gives Access to the Casket and Flower Rack

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-_ — = —- --—-— — Two Large St. Louis Residences Heated by Gas under the Block-Rate System: The Heating of That at the Left, with a Steam Radiation of 5,700 Square Feet, and Containing 225.340 Cubic Feet of Space, Cost $756.07 for the Season; of the One at the Right, $225.10, Using 470,800 Cubic Feet of Gas THE USE OF GAS FOR HOUSE HEATING An Impartial Discussion of Costs and Methods, with Descriptions of Some Typical Installations By PAUL H. WOODRUFF | { will doubtless surprise a good many householders, who now pay gas bills imounting perhaps to $50 or $60 a year for incidental uses alone, to learn that heating whole houses and buildings with gas is not only an economic possibility, ut an accomplished fact in a number oi ities. In the absence of information as to the comparative heating values of coal ind gas, the popular tendency is to con ider gas consumption economical only for the smaller duties, where convenience nd controllability are major assets. lt the purpose of this article to show by example that the two kinds of fuel are at least omparable, and when all conditions ire considered, it may appear that fas as a house- medium is sometimes equal or heating even superior to coal. Decision as to the specific im- portance of the modifying condi- tions must rest, of course, with the in- dividual user. Except for spo- radic experiments, the use of artificial gas for house heating is new. In only a few cities, like St. Louis, Portland, Ore., and Baltimore, is a comprehensive cam- paign for gas heating actually under way, though the Chicago company has a de- The Two Gas-Fired Boilers Used for Heating the Larger Residence Pictured Above: The Control of These Furnaces Is Automatic, a Thermostat in One of the Living Rooms Making It Unnecessary to Enter nD the Cellar at All to Regulate the Heat partment for handling such applications San Francisco has a number of installa tions, and many other cities can show one or more examples of successful gas burning The Portland houses. service company did no advertising on the sub ject until last season, and the St. Louis company, though a pioneer in the field is only now beginning its big drive for new business. Another year, promises great developments in the project, aided by rising coal prices. The householder, castimty doubtfully about in unfamiliar fields fora possible however, substitute for coal is interested first of ull in cost. What fuel will maintain his dwelling at the comfortabl temperature, and vet not him from the into the fire by Fiving him mn same throw frying pal | ills higher t the old ones he is trying to escape Based purely o1 the cost of raw fuel much pet heating unit, the answer is, none “ven at present prices for coal, and considering that gas rates in most places have not been raised, coal heat is cheapet than gas heat. There are, however, other considera- tions than mere heating power. Add to BIY at SO

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820) POPULAR MECHANICS the coal bill the cost, in Ke cents per 1,000 cu. ft ttme or money, of fur- through a separate me- nace feeding and ash ter, is made for the ben removal, the annual efit of house-heating overhauling of the coal- installations. In St burning plant, the very Louis, a so-called block tangible item of dam- rate system is used, th: age by dust and smoke, consumers beine and the gas burner im- grouped in division: mediately becomes a according to whether potent competitor, In their maximum con this comparison, in- sumption per hour is deed, it makes so good below 200 cu. ft., above a showing that compu- 3,000 cu. ft., or falls be tation even at regular tween these extremes meter rates does not al- Fach customer is billed together discourage in- for so many feet at 85 terest. cents, so many feet at But of course if the 60 cents, and the bal regular rates prevailed, ance at 50 cents. In that is, if the consumer Detroit, 85 cents per had to pay as much per 1,000 cu. ft. is charged cubic foot for house- up to 50,000 a month, heating gas as for cook- 75 cents from that up ing or illuminating gas, to 100,000, 65 cents up there would be little to 200,000, and 55 cents progress in the heating for all used above that line. The fact, perhaps figure. In Baltimore, not generally known, ts an arbitrary consump that practically all gas- tion rate is fixed for service concerns give each house, varying lower rates to large from 4,000 cu. ft. for a users, and even the six-room house to 10,- small house-heating 000 cu. ft. for a 12-room customer certainly falls pesigence in New York, Gas-Heated at Ouse, and 75 cents per in that category. Sev- the Regular 80-Cent Rate for $239.44 for 1,000 is charged on that we . . en the Season, as against $255.50 with Coal, nie . . : r ral methods of calc u a Case Mlasd to Buglicae basis, all excess used in lating these special the month being billed rates are in use, and perhaps are best at the secondary rate of 50 cents per 1,000 illustrated by a few actual examples. In some places the method is to make a In Portland, Ore., a flat rate of 50 flat customer charge of, say, $6 a year Group of Buildings of a Large “| School in Baltimore, Heated by the Unusual Method of Installing Individ: Six Hours a Day, and Remain Cold the Balance of the Time. The Total Seas

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POPULAR MECHANICS 821 plus a charge of 50 cents a year for each From this simple formula any pros- cubic-foot-hour of the consumer’s max-_ pective user will be able to calculate his imum demand, and then charge all gas own requirements and costs with consid- used at 40 cents per 1,000 u. ft For example, a user whose furnace burned 100 cu. ft. an hour would pay $56 a vear as a fixed charge, the gas being billed in iddition \ll these va- ious plans work to the ime end, which is to each customer as ow a rate as possible on bulk consumption, Without some such ar- rangement, gas heating not practical. While various kinds of | differ as to their — — iting value, the house- | holder gets little infor- | mation on the subject. pene as also differs, but ——— within limits regulated, A Large Brick Residence in Baltimore Heated by a Gas Boiler Using the i rule. by state or mu- Vapor-Vacuum System, and Containing 2,150 Square Feet of Direct Radia- r Sitios - tion: The Bill was $397, or About Equal to the Estimated Cost with Coal nicipal law, and therefore 1 matter of public knowledge. Gas sup- erable accuracy, bearing in mind the fact plied in Montana must have a heat value’ that coal is wasteful of heat, continuing not less than 475 British thermal units, to burn when it is not needed, while gas in Connecticut 528 units, in Illinois 530 to fuel conserves heat, instantly ceasing con- 565, and in New York 650. In Canada the sumption as soon as the bounds of effi- requirement is only 450 units. In the ciency are overstepped. Nothing is quite United States, however, 550 and 600 are _ so satisfying in the way of evidence, how- practically standard figures. Careful and ever, as records of actual performance. repeated tests by heating engineers have To consider an unusual installation first, established it as a fact that: a New York house may be mentioned for One ton of anthracite coal is equaled iu its economic success in using gas at the heating value by 32,000 cu. ft. of 550-B.t.u. regular city rate of 80 cents per 1,000 vas, or 29,333 cu. ft. of 600-B. t. u. gas. cu. ft. This house is one of a block, ex- i Gas Radiat rs in Bach Room: This Method was Adopted Because of the Fact That-the Rooms are Used Only Consumpticn was 1,584,100 Cubic Feet of Gas, with 6,000 Square Feet of Radiation

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822 POPULAR MECHANICS Stone House in Toronto, Can- ada, with 12 Rooms, Which Cost $362.50 to Heat with Coal, and Only $316.02 with Gas posed only at front and rear, with a south front, In the winter of 1916- 1917, its 17 rooms were heated by 15 tons of coal at $12 a ton, with seven months of at- tendance at $10 a month, and one-fourth cord of wood at $22 a cord, a total cost of $255.50. In 1917 the building was made one- fourth larger, and a gas-burning steam plant installed that used, the next winter, 299,300 cu. ft. at the full rate, or $239.44, no wood or janitor being needed. Thus an actual saving of $16.06 was made, without counting the addition to the house, and a uniform tem- perature of 70° in the daytime and 50° at night was maintained all winter. The conditions are peculiar because of the high heat value of New York gas and the low radiation loss of the building, and would be difficult to parallel. Gas-heat- ing plants are being installed, however, in a number of apartment houses of that city, primarily to escape the local janitor problem. Installations in Toronto, Canada, are interesting because of the rigorous win- ters of that latitude. Figures are avail- able far three detached houses, all well exposed on four sides. The gas was bought at a flat rate of 60 cents per 1,000 cu. ft. A 13-room brick house, east front, in the winter of 1917-1918 used 16 tons of coal at $11.50, seven months of janitor service Rooms and Two Baths, with Slate Roof; Heated with Coal at a Cost for the Season of $245, and Heated the Next Season for $222.78, with a Gas Boiler Two-Story Toronto House of Eight Rooms and Garage, Con bination Brick and Stucco Heated by Gas for $204.48 at $8, and $5 worth of! wood, a total of $245 It was steam-heated by gas in 1918-1919 with ; consumption of 371,30 cu. ft., costing $222.78 A three-story 12-roon stone house, nort! front, burned 25 tons of coal at $11.50, and used $75 worth of attendancx and wood, aggregating $362.50. The same work was done next season with 526,700 cu. ft of gas, costing $316.02 A combination brick and stucco house of eight rooms and a gar Brick House in Toronto Containing 18 age, north front, was gas-heated during the winter of 1918-1919 for $204.48. While comparative coal figures are not available for St. Louis, it is interesting to note a very large residential installation 11 that city, an enormous stone house having a total room space of 225,340 cu. ft., and 5,700 sq. ft. of steam radiation. Using ga under the local block rates, a temperature of 73° was automatically and constantly maintained at a cost of $756.07 for the se: son. Another large house on West Pine Boulevard was kept comfortable without labor by burning 470,800 cu. ft. of gas at a cost of $225.10, using steam heat. Monthly consumption figures for th« whole season are available for a larg brick house in Baltimore, which has 2,150 sq. ft. of direct radiation and is heated by the vapor-vacuum system with a gas boiler. In October, 11,000 cu. ft. of gas was burned: in November, 47,600 cu. ft.:

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POPULAR MECHANICS December, 122,000; January, 173,300; Kebruary, 145,000; March, 154,000; April, 110,000; and May, 31,000. Under the sec- ondary-rate system used in that city, pre- viously explained, the season’s bill was $397. Estimates for heating the same uilding with coal, including attendance, reached about the same figure. One of the most interesting installa- tions for which figures have been obtained is that of a large day school in Baltimore. lhe several buildings have a total radia- tion of 6,000 sq. ft. Because they are in use for only six hours of the day, the in- tallation of individual gas radiators for each room was decided upon. With this irrangement, the school finished the win- r with a total consumption of 1,584,100 cu. ft. of gas, At the secondary rate, and considering that coal fires would have been maintained constantly, it is calcu- ted that the gas cost 20 per cent less an coal Worthy of comment also, though help- ul to the householder only in the way establishing confidence in the system, Baltimore’s two gas-heated office One, a seven-story structure with 4,500 sq. ft. of steam radiation, used in the season of 1918-1919 a total of 1,895,300 cu. ft. of gas in two steam boil- ers. The other, a six-story store and ofice building exposed on three sides, heated by a 27-section gas boiler supply- ing 2,100 sq, ft. of steam radiation, burned 1,310,100 cu. ft. of gas, regulated by a thermostat located in a _ second-story ( ce, Los Angeles, 18 house-heating coal ces have been converted to gas burn- -1 4 lldings 825 ers, and it is found that the ordinary eight to ten-room house is adequately heated by about 75,000 cu. ft. of gas a year. This exceptionally low figure is f Gas Furnace, Right, Installed Alongside of a Coal Furnace: Dual Installations of This Kind Are Quite Convenient, a, Coal Only in the Mcst Severe a Weather, and s the Rest of the Winter accounted for, of course, by the well- known climate of the region, and the availability of gas of high heating value. San Francisco also has a number of in- stallations on sliding-scale rates, but they have proven more expensive than coal, Though the advantages of gas fuel are quite obvious, they are so important a factor in any comparison with coal that a A Type of Gas Boiler That is Gaining in Popularity: With It Hot Water may be Heated, or Steam Generated to Supply Steam or Vapor-Vacuum Heating Systems. The Gas is Burned in a Chamber under Less tham Atmospheric Pressure brief summary of them will not be amiss. In the first place the boiler or furnace needs prac- tically no attention, the control of temperature and consumption being automatically regulated by a thermostat in one of the living rooms, which may be set for any desired figure. This thermostatic control is a feature of all systems of gas heating, and besides its convenience, accounts for a de gree of economy that would not be possible without it, since the fuel supply is promptly turned off when the house is warm enough. The fuel is piped con tinuously into the house as it is used, and need not be ordered o1 any preparation made for storing it, the coal-bin space being given to other uses. There are no ashes, dust, soot, or smoke, and

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$24 POPULAR the poisonous carbon monoxide is not generated. The disadvantages are that fuel gas at economical rates is not yet available in many places, and that efficient gas heating requires a larger boiler or furnace than is used in coal heating, be- cause its capacity must be equal to the largest demand made upon it, while a coal furnace may be forced, by frequent firing, to carry an overload. It is possible to heat a house with gas burned in a coal furnace, but it is not good practice, and is wasteful of gas. The well-designed gas furnace has a larger radiating surface and a longer fire travel, and little heat is allowed to escape up the chimney. Not infrequently a com- bination heater is found desirable, in which gas may be used regularly and supplemented by coal in the most severe weather. With the proper design, how- ever, steam, hot-water, hot-air vapor, or vapor-vacuum heating may be employed with gas. For certain purposes, even the individual-room system of heaters may prove efficient, as seen in the case of the FIND FLAWS IN MICA QUICKLY BY X-RAY EXAMINATION So efficient is the X-ray for detecting flaws in electrical mica that a large eastern concern has installed a special cabinet for the work. The mica is built up by hand processes, and sometimes contains weak Special X-Ray Cabinet for Finding Flaws in Mica: The Operator Occupies the Curtatned Booth at the Near End MECHANICS Baltimore school mentioned before. — 1; may be noted here that the kind of fue! supplied, coal gas, by-product coke-oven gas, carbureted water gas or oil gas, ha no effect upon the efficiency of the sys tem, provided that the heating value British thermal units is the same. The tendency of modern gas practice i: to abandon the old candlepower standard and gauge the product wholly by its heat value. The movement for special heating rates, as exemplified in the cities men tioned, and encouraged by their success also is growing rapidly. The national as sociation of gas producers has attacked the problem, and is attempting to work out a definite relation between supply and demand in this new field. It is consid ered, also, that public familiarity with gas heating will create a summer load for the supply companies in the shape of water heaters and refrigerating plants. As soon as an equitable rate schedule has been fitted to the new conditions, house heat ing with gas fuel will cease to be the nov elty it now is to many persons, i spots or foreign substances which would cause trouble later. The specimens are placed on cloth-bottom trays under th« tube compartment, while an observer in a light-tight cabinet watches the fluoro- scope. Thin spots show light, while metal particles cast black shadows, making de- tection certain and rapid. Graduation on the trays, appearing on the screen, enable the observer to report the location of each defect. NAVIGATION IS MADE SAFER BY USE OF RANGE FINDER A vessel equipped for measuring its ex act distance from land, without compu tation, is in little danger of running onto known reefs or shoals. Several ships ot the British mercantile marine are now using a form of range finder, developed during the war, as an aid to navigation The range finder is of the astigmatic ty p« the distant object being viewed through a system of prisms and lenses mounted in a long transverse tube, with an cye piece at the center. The principle of, the optical arrangement is to displace half ot the image, which is then brought into register by adjustment, and the distance read directly on a scale. The instrument is also of great assistance in crowded har- bors, and for marking the position ot floating objects.

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Image from Right + i] Objective © Image from + Left Objective ! an ‘a Coincidence of lm- I-defined glare of By great magnifica- ' } ~ — "ca LL. cages twee Light, coincidence 7» Rnatewya A — : | js then nage is icated impossible Sebi out ies “| * UMaynification (1S — assists identification Action of Astigmatizer in at Night tT Object H Z no means of checking , in nge ee progress ~“~—w J *. lat Ship Bearing Hy Compass ° “~~ 5-“palltica and Distdnce shown . by Range Finder } gives Posttion af Ship immediately on chart j ‘ Fixed it > — TF | te. a a a es SE oe Range Finder . ii ’ , M ted Left-hand unit of 2 Tele = Bridge scopes, placed endtoend, Astigmatizer cut away toreduce weight Lever .-~ and temperature effects Central Details of Range Finder Range Scale moving with Deflecting Prism and registering range Priem reflecting Central range scale into Priems Ray from Prism Prism Ray from Milled head left receiving ive i fc lamp le beneath operating sere receiving right Electric lamp left eyepiece 1 otyective ight : : to read scale right deflecting bie nak an witan ie objective at rfeght eyepiece gear : s Astigmatizer Geor Deflecting f with glacses pivoted Prism moved . to move upward in oF out to Leg of Tripod > into beams of light adjust image Mounting on which inetrument rotates 4 The Operation of the Astigmatic Ran i i : ; ; I ge Finder for the Navi~ation of Merchant Ships is Clearly Shown by the Series of Diagrams. The Bull’s-Eyes at the Top Indicate the Appearance of the Object in the tyepiece. The Center Picture Reveals the Scheme of Application to Navigating. The Two . ° Low Inserts Give Details of the Construction of the Range Finder — PY@MGrT, + TRATED LONDON NEWS

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a a 265 POPULAR AIR-MAIL PLANE COLLIDES WITH FACTORY CHIMNEY The unwisdom of establishing an air- drome in a manufacturing, similarly well built-up, neighborhood is suggested or a This Photograph, Taken a Few Minutes after the Colli- sion, Shows the Truncated Chimney at the Right. The Wrecked Plane Lies in the Foreground, Its Left Wings Pressing upon the Fence by a recent accident at an air-mail field near Newark, N. J. This field is rather short, making it necessary for the postal airplanes to circle low over the surround- ing structures before landing. It was while maneuvering thus, that the DH-4 air- plane, laden with 350 lb. of mail, en- countered a 7/5-ft. brick chimney. The machine crumpled, and fell into the fac- tory yard, as bricks from the topmost 10 ft. showered the ground. The pilot was killed. @ Paris will soon boast a vast building, if present plans are carried out, where 5,000 of the world’s leading manufacturers will display and sell to buyers from every na- tion. MECHANICS JAPAN STARTS FOX FARM WITH CANADIAN STOCK A striking example of the Japanese peo ple’s enterprise and their faculty of s x upon any Occidental business whi shows promise of being financially succes ful, was evidenced whe: the great steamship “En press of Asia” sailed cently from Vancouve Canada, for Japan. O board were six aristo crats of the silver-fo» world, domesticated beasts with a guarante: pedigree behind them The vulpine travelers were shipped from a famous fox farm in Prince Edward Island eastern Canada, the land where fur farming had its birth, and were de tined to a firm of Japa nese capitalists in Japan. The price of the six ani mals was $30,000. These were pedigreed stock raised in captivity from a long line of silver foxes Some parts of Japan have a climate sufficient ly like that of Prince Ed ward region to lead th: In ——- ——- 4 buyers to try raising these animals in thei: homeland. The fare of the animals en route was a very expensive one, th« best of beef, lamb, pork and chicken being fed to them. The six will b the first ever imported into Japan and will form the original stud for the experiment. RIVER MOTOR LIKE PENDULUM RUNS IRRIGATION PUMPS Streams with a moderate current ar made to give up some of their power! without a dam, by the use of a current motor devised by a California inventor The power is generated by the swing of two parallel bars, like a huge horizonta! pendulum. They are pivoted upstream, NEWARK, NW. J PUBLISRING CO and carry at the lower end a set of buoyant paddles that act like rudders, an automatic spring throwing them first at one angle.and then at the other as they swing across the current. A model ‘now

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POPULAR - - rl _ vgn) % a ie - < e Ss MECHANICS Pa 4 } , . - F g . . F 2 nS re : a os : .*% y ~ — 2o ge ~ ee. <A <2 “ ee , : - os ond = : = _ # 7 at ’ = m *,” = Bs i i At hig ; . <= 2 _ “&Z Lc » hee The Current Motor in Action: The Anchored Upstream End, at the Right, is Connected by Cables to the Walking Beam of the Two-Cylinder Pump on Shore, the addies Downstream being Oscillated by the Current n operation in the Los Angeles River has 16 hollow sheet-iron paddles 14 by 20 in., 18 in. apart, with a side play of 15 It is raising 60 gal. of water a nute 18 ft., by means of two pumps of \)-in. bore and 22-in. stroke, with a 3-in. ipe. The pump ptstoms are operated by walking beam connected: by cables to frame of the current motor. COMBINED TRACTOR AND AUGER PLANTS POLES QUICKLY The old, slow hand process of boring ole holes and setting telephone poles in hem has gradually been now practically the whole proceeding is mechanical and very rapid. An end- less-tread tractor, able to negotiate any kind of ground, carries the earth- boring machine at one end of its frame. When the power is switched from the tractor to the big auger, the pole hole is quickly made, and the boring tower is then used to hoist the pole into place, The entire opera- tion takes only about eight minutes. The same improved until machine will bore holes of any size from 2 to 30 in., and 8 ft. deep. It may be used for plant ing posts or pipes, 1 desired, as \. well as poles.

A Tractor with an Earth. Boring Machine Attached Which Digs Holes and Sets Telephone Poles in Them in a Hurry

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825 POPULAR MECHANICS COMBINE BURIAL VAULT AND MONUMENT STRUCTURE —— eee A monument that can be mad in any desired form, containing a vault in which may be placed one, two, or even more, caskets in permanent security, has bee: patented by an architect of Geor gia. Three distinct walls are em bodied in its construction, a substantial intermediate casing of reinforced concrete, an innet crypt of slate or other suitabl material, and an outer facing of ornamental stone, such as mat ble. The reinforcing mesh in the concrete runs a zigzag course oe eat : between bronze hooks fastened to the crypt wall and the inside Dignified Exterior Appearance of the of the facing, giving the struc Combination -— ~ and Burial ture strength to resist storm and even earthquake. A slab door is locked into one end, its sill level with the top of the lower crypt The slab covers of both crypts are provided with bronze rings for easy removal, but may be sealed after the caskets are in place. As a whole, the combined monument and vault is a mas sive unit, safe against intrusion, accident, and moisture, and with as elaborate an exterior as may be desired. i A Typical Design That Indicates the @The Sahara Desert has been crossed by airplane. Two French airmen recently landed in Dakar Partial Section through the Vault, Showing the Arrangement E yi ‘ Rowing of the Two Crypts, the Lower One Occupied by a Casket: The on the Atlantic coast, Naving Zigzag Reinforcing in the Concrete Intermediate Wall is Also completed a journey of 3,500 Seen, as Well as the Method of Placing the Exterior Slabs and 7 . ra ¢ Mouldings miles from Algiers. UNLOADER IMPROVES NEW TUMBLING BARREL To improve the _ tumbling barrel, a device used for polish- ing small metal parts, a middle- western manufacturing company has added an automatic unloader to the machine. This makes it possible to empty the drum with- out stopping the tumbler. One end of the cylinder is equipped with a combined plug and chute. sy turning a handwheel, the former is withdrawn, and the lat- ter brought into position for dis- charging the contents of the con- trivance. A worm, placed inside the drum, moves material to the By Turning the Handwheel at the Left, without Stopping the chute. Another feature of the Tumbling Barrel, a Plug in the End is Withdrawn, and the Con- i : : tents Moved Along by an Interior Worm and Discharged into machine is a power loader. the Chute

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POPULAR MECHANICS Che Large Picture Shows a Typical Interior Movie Soming. with the Camera in the Foreground, and the Scene Illuminated by Banks of the New Lamps. In Detail, at the Right, are Seen the Projecting Arc with Diffusing Screen at the Top, and the High-Power Spotlight, at the Bottom LIGHTING OF MOVIE STUDIOS IMPROVED BY NEW LAMPS Motion-picture making by artificial light, already highly developed, is still further improved by two new types of tudio lamp, recently brought out. One of them is particularly interesting be- cause it introduces a novel element to the pictures. It is virtually a spotlight, of sufhcient power for photographic use. With this lamp, the glow of the pocket flashlight, the burglar’s dark lantern, and similar effects, are realistically reproduced in the pictures, or local high lights pro- duced in any scene, The other lamp is an inclosed are equipped with a project ing funnel, and a sliding ground-glass diffusing screen. With a bank of these lamps, a scene may be flooded with light of even density, giving an accurate re- production of natural lighting. «Only prompt passage of a Federal pro- tective law will save the American eagle from extinction, according to a warning issued by the American Museum of Natu- ral History. Destruction of the species is proceeding most rapidly in Alaska, where hunters kill the birds for a bounty offered by the territorial government. SMALL PRECISION BALANCE USED FOR FINEST WORK One of the precision balances now used by the U. S. Bureau of Standards is said to be the smallest in the world, of the type used for work of similar importance a This Little Balance is Used in the Laboratories 0! the United States Bureau of Standards. For a One Gram Weight It Is Accurate to within One Par in One Million

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S30 POPULAR In its glass case it stands a little more than a foot in height. It takes loads up to two grams, and is reliable to 000001 gram, or about .0O002 grain. Its sensi tiveness may be judged from the faet that it will weigh a part of an eyelash APPARATUS TRACKS FLIGHT OF METEORS THROUGH AIR The luminous flight of the small plan- etary bodies, or meteors, that periodically atmosphere, shower our. territorial has The Meteor-Trackirg Instrument is being Demon strated by Its Inventor. With It, All Necessary Data are Obtained at One Observatory usually been studied by means of simulta neous observations at stations many miles apart. From the parallax so obtained was computed the elevation of the body above The Curious Location of the Locomotive in the Picture Is Part Accident and Part Design. MECHANICS or the ink in a signature. When in us the scale is usually manipulated, by mea of extension rods, from another roo: In this way the measurement is unaffect by the heat of the observer's body. T! glass case is dust-proof. the earth, the length and direction of course, and the place of entrance in and exit from the atmosphere. Thes duplicate observations are now made wu: necessary, however, by the recent inve: tion of an English astronomer. Using the little apparatus, a single observer can gather all the data itemized above. LOCOMOTIVE PLOWING SNOW ENDS CAREER IN SWAMP After a storm that buried the New Eng land coast in snow last March, passengers on a railroad line through Rhode Island were amazed to observe a_ locomotive standing upright in a swampy brook that runs under the right of way at one point The engine started out with a snowplow to clear the track, but jumped the rails at the brook trestle, the plow going on way and its motive power the other. Con fronted, then, by the problem of removing the new obstruction, and not caring to de vote three engines to getting one back on the track, the rail men cut the Gordian knot by rolling the big locomotive down the embankment. Despite the slide and plunge, it finished right side up. ae BY COURTESY OF THE PROVIDENCE RNA It Ran off the rack While Plowing Snow, could Not Well be Rerailed, and was Pushed into the Creek to Clear the Track

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POPULAR MECHANICS ” ted —_—S Curious Tractor Consisting of a Special-Wheeled Frame on Which an Auto ‘is Placed: Chains from Sprockets on the Rear Hubs Drive the Ground Wheels, and the Separate Steering Wheel is Supported on a Side Post TRACTOR IS WHEELED FRAME WITH AUTO ON TOP Numerous methods have been ved for making an auto do tractor luty, but one recently designed by a Mis ourt farmer departs a long way from he conventional form. The tractor part onsists of an angle-iron frame with four teel wheels. A small auto is placed right nm top of this frame, and sprockets fas- tened to its rear hubs drive an internal the tractor wheels. \ steering column rises alongside the auto seat. and a post in front of the lrame carries a combination power pulley nd fan. The unusual arrangement is loing good work, and the auto is always ready for its regular use. . con year system on ertical FOUR-STORY OFFICE BUILDING OCCUPIES SMALL SITE More like a tower than an office build ing is the singular brick structure used as headquarters by a construction company in a Texas city. Though four stories in height, the building occupies ground spac measuring only 9 by 19 ft. On each floor is a well-lighted office, 8 by 12 ft., and a stair landing, the latter at the rear. The structure was erected during an oil boom. when it was impossible to lease desirable otice space, or to purchase a larger site in the business district. Three hundred outside workmen are directed by the oc- cupants of the offices. Occupying a Site Only 9 by 19 Feet, This Four-Story Building Contains 384 Square Feet of Office Space

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832 COLLEGE OFFERS FARM LADS SHORT TRACTOR COURSES The growing use of farm tractors in lowa is turning the attention of many special farmer boys to the short-term A Group of Iowa Farmer Boys are Here Receiving Instruction in the Care and Operation of Tractors of Various Makes. of This Kind Follows Every Class-Room courses offered every winter and early spring by the state college at Ames. These courses are so arranged that the student can gain a practical knowledge of the operation and care of tractors in two weeks’ time, or if he desires, hg may re- main a few weeks longer, and go back to the farm an embryo expert. Various makes of tractors are provided for the training, in order that the students may be familiarized with as many as possible of the many types used throughout the state. Much classroom instruction is given; but most emphasis is laid on prac- tical work in the shops and in the open. . . ¥ % ‘ a + oe we a a, EE " ~ 2 The Short Tractor Course is Offered by the State College at Ames, Iowa, Every Winter and Early Spring T ncreased the Efficiency of Many Iowa Farmer Boys he Instruction has POPULAR MECHANICS ENORMOUS TRADE FAIR HELD IN CRYSTAL PALACE London’s Crystal Palace, the largest ex hibition hall in the world, was jamme: with the displays of 1,200 British firms _ a few weeks ago, a Britain made its opening move in its campaign fo: world trade. For a fort night, buyers from ever corner of the earth in spected the cutlery clocks, glassware, leathe: goods, scientific instru ments, knockdown furni ture, and a dozen othe: articles that Britis! manufacturers are eager to supply to the foreig: trade. Every corner o/ the vast interior wa crowded with booths the streets between then totaled five miles and ai half in length. Scattered throughout the interior Practical Work were a dozen stalls ir eri : , Period which the foreign buyer found interpreters speaking, in all, almos 20 languages. At the close of the fai: it is worth noting, the displays were di vided into four traveling exhibitions which are to tour the United States, Sout! America, the British dominions, and thx Far East, in an attempt to foster the popularity of British-made goods. @“Simplified spelling,” used in all publi- cations of the Modern Language Associa- tion of America for the last 11 years, no longer approved by that body, as result of a vote taken at the recent annua! meeting of the society.

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Upon This Airplane View of Swan Island and Its Surroundings have been Sketched the Outlines of the Improvements Projected by the City of Portland, Oregon. Dirt Dredged from the East and West Sides of the Island will be Used to Reclaim the Low Areas Now Designated as Guild’s Lake and Mock’s Bottom HARBOR OBSTRUCTION TO BECOME SHIPPING AID By HORACE E. THOMAS SWAN ISLAND, which divides the With all this development work accom- Willamette River at Portland. Ore., plished, Swan Island has remained a bug- causes a sharp curve in the main channel _ bear to the engineers and the shipping tn- that has long been recognized as a handi- terests. The island lies right in the har- cap to shipping. Now the island itself, bor, within sight of the business district or rather half of it, is to be removed and of the city. The Willamette flows north- 1 new and safe channel created. The west at this point, and the main current other half of the island is to be utilized as is diverted to the east of the island, de- ite for docks and industries, the present scribing a sharp curve. This is the impediment to navigation thus being con present ship channel, the water west of verted into the chief asset of the harbor. the island being too shallow for naviga- To understand the scheme, it should be tion. The tortuous passage, while not ex- realized that Portland, although 100 miles actly a menace to vessels, is difficult to from the Pacific, is in reality an ocean -negotiate and not welcome to mariners, port. It is the outlet of the vast basin Portland will spend $16,000,000 to solve of the Columbia and Willamette rivers, its the difficulty, according to the plan vheat and lumber shipments in particular adopted by its port and dock commis- being enormous. Large vessels, drawing sions. When worked out, it will result in 25 to 28 ft., enter the mouth of the Colum- an ideal terminal for rail and water ship bia from all parts of the world, proceed ping, changing the entire appearance and up that river to its junction with the character of the river and its surround- Willamette, and thence to Portland. To _ ings at this point. make this traffic possible, the Federal gov- The west side of Swan Island, which ernment and the city of Portland have has an area of 267 acres, will be dredged spent many millions of dollars building away, creating a new, absolutely straight jetties at the mouth of the Columbia and river channel 1,600 ft. wide, and its great deepening and widening the ship channel. width and adequate depth—30 ft. at low we

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$34 er a wha ~~ 2 eo ote Se mm . , This Sketch Portrays the Harbor of Portland as It will Appear When the Swan Island Project is Carrie: Through. Included in the Project. POPULAR MECHANICS ee ———— Channel, Docks, Swan Island Mole, and Industrial Sites on Both Sides of the River, All ar« Unlike the Photograph on the Preceding Page, It may be Explained, This Sketct Looks Upstream water—not only will make it a safe course for large vessels, but will enable it to serve as a turning basin. The present east channel will be closed at its south end by a causeway, but deepened and widened by dredging away the east side of the island, it will become a still-water an- chorage. With the dredging completed, the sides of the island, with the exception of its notthern extremity, will be perfectly straight. Along its west shore, parallel with the new main channel of the river, will be built a mole 5,000 ft. long, which will also be used as a dock site. Another dock will be built along its east shore. Between these docks the land will be di- vided into industrial sites, served by rail- way connections over the causeway that leads to the east bank of the river. The project, however, is not confined to the straightening out of the river and the improvement of Swan Island; almost as important will be the industrial districts established on the mainland. The shores on both sides of the river at Swan Island are low and marshy. As the dredges tear away at the sides of the island and at the river bottom, the material excavated wil be deposited through pipes on this low ground. All of the low area is to be pur- chased by the city before dredging begins and the engineers have calculated that sufficient material will be dredged to build it up to a solid level foundation Guild’s Lake, an interesting body o water, is included in the area that is to be filled on the west shore. It formed the lagoon of the Lewis and Clark Expositio: in 1905. Part of the lake already has been filed by hydraulic excavation from the hills near by, and now the remainder of it is to disappear to meet the necessities o! commerce, The dredging operations will move 36,377,072 cu. yd. of sand and dirt, and this material will reclaim a total of som« 1,530 acres of land now useless. Of thi about 890 acres will be in the Guild’s Lak« district on the west shore; 480 acres in a tract known as Mock’s Bottom on th« east shore, and the remaining 160 acres on Swan Island itself. This land is to become sites for manufactories and freight yards. The filled-in land on th« west side will provide 65 industrial sites

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POPULAR 110 by 200 ft., 69 sites 200 ft. square, with 100 acres reserved for such subdivisions become The eastern is May necessary. hore area will be divided into tracts ol large dimensions. The railroad yards themselves will be of great importance. with facilities on the west side for 3,000 irs. and on the east side for 2,700 cars \long the west shore a system of piers ll be built, although their cost is not neluded in the $16,000,000 estimate that is been placed on the improvement. (hese piers will provide dockage for 76 ips of 500-ft. length each, and, with the Swan Island and in the still vater basin east of it, will meet the future the harbor. lo } Ss On quirements ol AUTO-BODY RUBBING MACHINE DOUBLES HAND OUTPUT \ mechanical rubbing machine, for fin automobile bodies, has been de veloped in the experimental department f an eastern car builder, and is being ed in the paint shop with very satisfy ng results. The machine is driven by ympressed air, and its polishing members sist of two cushioned feet that move ick and forth in opposite directions. (he mounting of these rubbing cushions rmits them to conform to any curve of the body, and to work vertically as well horizontally, using the same rubbing iterial as in the hand operation rhe ning Mechanical Rubbing Ma- hine for Finishing Auto Bodies, Operated by Com- pressed Air. The Two Polishing Buffers, Seen beneath the Machine, Work in Opposite Directions. They Vouble the Hand Output of the Oper- ator tool is mostly of aluminum, and weighs but 20 Ib. With it, an operator's daily output is seven twice the manual rate. bodies. or MECHANICS 835 VERTICAL ENLARGING CAMERA SIMPLIFIES PHOTO WORK Making photo enlargements always has been rather an exacting task, but the in creasing demand for this work has finally Vertical Enlarging Camera, Suspended from an Adjustable Arm and Easily and Quickly Focused on the Paper Below evolved a new enlarging camera which greatly shortens the operation by the simple means of working vertically. The instrument, of the bellows type, is sus- pended from an adjustable arm above a table in the dark room, and the printing paper is merely laid on the table. The electric light and reflector form the back or top of the camera. CREW OF U. S. AIRSHIP “R-38” SAILS FOR ENGLAND Three officers and 18 enlisted men, the pick of the U. S. Naval Air Service, r cently sailed for Southampton, England, from Hoboken, N. J. In company with the two naval officers who preceded them to England by several weeks, these men are to assist actively in the last stages of the construction of airship “R-38." Ofh cers and men will devote several months, too, to actual flying training with big British dirigibles. This experience will prepare them for their work with the “R-38," which they will fly to Lakehurst, N. J., in the spring of next year

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836 POPULAR NEW MEASURING WHEEL MADE FOR ACCURATE WORK A measuring wheel which embodies many improvements, all making for ac- curacy, is now sold by a manu- facturer of engineering sup- plies. The wheel proper is * constructed of hard wood, and is tired with brass. Be- tween brass and wood is a ~ o ’ : “ - [The Wheel is Here being Used to Measure a Length of Track. A Counter on the Handle Frame Registers the Revolutions MECHANICS strip of rubber that furnishes the resi! iency necessary for adjusting the circum ference to exactly 10 ft. The wheel ; pushed by a handle, which is hinged, mak ing it impossible for the surveyor acci dentally to raise the wheel by bearin; down on the little cast-iron trailer whee! When the desired length of rail or pav ment has been traversed, the survey: reads the distance traveled from a cou ter on the handle frame, adding the read ing on the wheel rim. A _ positive-actio: hand brake is placed near the handk hinge, LEGION WARNED AGAINST LOSS OF DISCHARGE PAPERS The increase in the sentimental an legal value of the discharge certificat with the passing of the years is dwel upon in a recent message sent by the national commander to all members o the American Legion. He warns against loss of the documents, and urges that they be recorded in the office of the county clerk. BRITISH MAKE PAVEMENT OF GERMAN HELMETS The German Helmets were First Laid by Hand upon the Muddy Surface of the Compound At a great dump ot captured war material in southern England there was recently conceived the idea of paving a muddy section of the compound with German helmets. As the potlike head protectors into Place b had ac- The cumulated by the tens of thousands, the plan was easily executed The helmets were laid by hand, and as clos together as possible, o1 the bare ground. \ tractor was then driven back and forth upor them until all wer firmly imbedded. Th« result resembles a cob blestone pavement. When the Strange Cobblestones Were All in Position, They were Pressed ractor. irpose Well the Treads of This mpove. Artillery ew Pavement Serves Its Pr

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POPULAR MECHANICS 8333 The Large Drydock at the Right, Just Completed, Cuts through the Old Site of a Smaller One, Making Con- struction Easy. It is Connected by Tunnel with the Dock at the Left, and Either may be Filled or Emptied from the Other BUILD NEW PACIFIC DRYDOCK RAILROAD USES PORTABLE SET WITH HELP OF OLD ONE OF FIRE-FIGHTING TOOLS the largest drydock on the Pacific \ complete set of fire-fighting appara- vast, 1,096 ft. long over all and built to — tus, including hose, axes, and other tools, iccommodate any ship that will pass housed in a light case, is now included in through the Panama Canal locks, has just the equipment sent out on all new con cen completed a little way south of San — struction work along the line of a western francisco. Because the new construction railroad. ‘The little fire house is readily uns diagonally across the site of an old, lifted off the flat car at the work camp, mall dock, a cofferdam was unnecessary, and assures protection for the various the new work being done in the old cais- paraphernalia of a maintenance or con mm. Alongside the big dock is another, struction gang /50 ft. long, the two being connected by tunnel. A by-pass also connects the tunnel with the bay outside, so that water in be admitted to the new dock directly, iT by way of the old one. Each dock has its own pumping plant, but because of the tunnel, the new pumps can be used to empty the old dock, or the pumps of the older one can take all but 10 ft. of water out of the new. @The Canadian dollar is now worth so much less than the American that the ex- press companies are following the lead of the railroads in requiring prepayment of ee ia - charges on all shipments to points beyond The Box in the Center, Easily Lifted on or off a Flat ] car, Contains Fire-Fighting Tools for the Pro- one boundary. tection of Railroad Work Camps

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SoS POPULAR ROTARY SLEEVE-VALVE MOTOR IN FARM-LIGHTING PLANT The sliding sleeve-valve action for gas- oline engines has established itself in pop- ular favor by reason of its silent operation Farm-Lighting Plant with a Gasolirie Engine That Has a Rotary Sleeve Valve, Revolved by Gearing from the Cam Shaft, and Supported by Only Two Bearing Points and freedom from vibration. The rotat ing sleeve valve, though possessed of the same characteristics, is still something of 1 novelty, but it has recently been applied with success to the single-cylinder motor of a small farm-lighting set. The sleeve is revolved by gearing from the cam shaft, ind has but two bearing points. The whole set, mounted as a unit, develops so little vibration that it runs almost silently with its base set up on three common glass tumblers: The engine has a consid- erably smaller number of parts than the usual poppet-valve type. AIRWAY FROM CAIRO TO CAPE FOLLOWED BY BRITISH AIRMAN The trans-African air route, laid out last year by three heroic parties, as de- scribed in this magazine for September, 1919, has now been followed from Cairo to Cape Town by a British airman. This pioneer, Wing Commander van Ryneveld, landed at Cape Town in the third airplane used by him in accomplish- MNIECHANICS ing the distance of 5,206 miles. His first, a Vickers-Vimy, crashed soon after th: start from Cairo. His second, likewise a Vickers- Vimy, carried him as far as Bula- wayo, 3,880 miles to the south. Here he rested until the arrival from Cape Town of a DH-9, placed at his disposal by the Union of South Africa. Among other ma chines that attempted the flight and crashed en route were an R. A. F. bomber and two big planes flying the colors of fa mous British dailies. Among several factors that combined to thwart so many attempts are most often mentioned the abnormal heat, and the ex treme altitude of so many of the stations The first seems to have exerted a uni formly destructive influence on the en gines, while the second often made ascen sion a matter of peril and uncertainty The landing places, too, while remarkably good considering the difficulties of their establishment, were widely separated, poorly surfaced, and, mere specks in an interminable expanse of desert and jungie, were usually hard to find. Discouraging as were the many failures, they indicate that the cost of a regular trans-African relay service would be almost negligible compared with the resulting increase in local and imperial efficiency. QUEER RIFLE RANGE TESTS SMALL-ARM BALLISTICS Down at Miami, Fla., the United States \rmy has set up a curious rifle range. It is latd out along a two-mile straightaway stretch of salt creek, though the target is only 100 ft. from the guns, and is merely a screen without any bull’s-eye. The pur pose ot this odd station is to determine the ballistics of rifles and machine guns, and to make tests of new forms of bullets. Th: three-story dock which constitutes the firing point has an elevated platform fo the gunners, and a still more elevated stage from which observers armed with transits determine the angle of the bul let’s start, as indicated by the perfora tion it makes in the screen. Along thy creek the range is staked out every 2° meters, or 82 ft., and observers behind shelters mark the range at which each bullet enters the water, and report bach to the firing point. From these figures computations determine the range and trajectory for each angle of elevation, o1 the necessary angle for any range. Pres ent experiments with machine-gun am- munition are expected to evolve a new load that will outshoot any used in the late war.

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oe s Pm To - Machine Gun with Panoramic Sight, Ready to Fire at the Screen: Beyond the Gun Is a Transit for Reading the Angle at Which the Bullet Starts =. Range Equipment of the Small-Arms Ballistic Station: The Meteorological Instruments at the Top of the Firing Point Keep Track of Windage, and the Men on the Upper Deck Watch the Screen and Range, to Get the Time of Bullet Flight and Defiection as It Strikes the Water The Water em y One and a Quarter Miles from the Guns: An _ Observer Stationed behind a Shelter Takes Note of Each Bullet Splash and Reports It Back to the Firing Point. The Picture Shows the Effect of Rapid Fire from a Machine Gun with a New Type of Bullet

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$40 POPULAR ELECTRIC OVEN SOFTENS TOPS OF STORAGE BATTERIES For softening the sealing compound and rubber parts of storage batteries, the garage man may now provide himself with Z_ The Oven has Here been Lowered upon a Storage Battery. Current Flows from the Plug in the Top to Three Heating Elements ———d a small and efhcient electric oven. The apparatus consists of a metal box, about 9 by 9 by 22 in., open at the bottom, and with its three electric heating units fixed beneath the top panel. The back of the box is attached, by means of a bracket, to an upright pipe standard on which it can slide to accommodate a battery of any height. After four or five minutes’ heating in the oven, the sealing compound is so soft that the top may be readily re- moved from the battery The Oriental is being Buried, atthe Left, in the Presence of Witnesses. Taken Eight Days Later. MECHANICS PERFORATION OF PLANT ROOTS AUGMENTS FOLIAGE GROWTH In the course of experiments with i tensive horticultural methods a Cuba: agronomist has developed an interesti: way of forcing foliage growth. His met] od is simply to make a number of hor zontal perforations in the the plant. Naturally, his experiment were made with lettuce, parsley, and other plants valued solely for their leay: Working with several parsley plants, { example, he forced growth to 32 in. diameter and 18 in. in height, in cass where similar, untreated plants measured respectively only 22 and main root of 12 inches. ORIENTAL BURIED ALIVE FOR EIGHT-DAY PERIODS ‘he people of Berlin and other Ger man cities have been puzzled recently by the inexplicable feats of an itinerant per former from Bombay, India. His exhibi tion recalls the inhuman practices of Mo hammedan “howling dervishes,” who in their ecstasy eat live coals, devour ser pents, and handle red-hot iron. He dos none of these, however; instead, he con tracts himself into the smallest possibl compass, and is wrappd in canvas. Car ried thus to an open field, he is buried several feet underground. Here he re mains, ostensibly without food, water, o1 air, for eight days. In explanation of his performance he will say only that he has spent practically all his life in train ing for it. COPYRIGHT, KADEL & HERBERT The Photograph at the Right was The Performer has Just been Exhumed, and is About to be Released

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POPULAR MECHANICS 541 ALL-METAL PLANE CRASHES ON AMERICAN FIELD ie first pas- ver airplane reach A mer- ca trom Ger- many was not one of the con ventional type, oddly enough, but was an m- eresting all- :!| mono- of the d cde seribed » Popular Me- inics Maga- ‘ Experts of the American Air Service are Inspecting the Wreck ne for Febru- of the First German Commerical Plane to Reach the United a 19%) Ac States, in the Upper Picture. The Rupture in the Metal Fuse- y» —e ‘\S lage Structure is Clearly Seen. Im the Lower Picture is Seen ssembled on How the Engine Broke Cleanly from the Fuselage. The Shock evelt Affected the Wings But Little . L., it was seen to be identical, in imum alloy, which form Field, I first flight, rob bing American airmen of an opportunity to study its per formance. Air Service engi neering officers made a careful investigation at any rate, ol the structure’s strength and weakness as re vealed by the accident. They found that the corrugated sheets of alum the fuselage, had ict, with the published illustration. Un- failed completely just in rear of the lux fortunately, the machine crashed on its wriouws eight-passenger cabin.

COMPRESSED AIR OPERATES FERRY GUARD RAIL \ guard rail operated by compressed ir has taken the place, on a San Diego ferryboat, of the cumbersome chain formerly stretched across the stern to prevent vehicles from rolling into the wa- er. The rail rests on two steel plungers vhich slide in vertical cylinders below he deck. When compressed air is ad- mitted to these cylinders, by the turn of t cock im the wheethouse, the plungers rise, carrying the rail with them. When the vessel docks, a second turn of the cock allows the air to leak from the cyl inders, ; s ~: = > ; <ink This Guard Rail is Raised by Pneumatic Pressure t ’ rigs, ind md —— the rail to ink Keep Vehicles from Backing off the Ferryboat. ack into its recess in the deek. A Turn of a Cock Lowers the Rail

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Sie POPULAR SPECIAL COFFERDAM SAVES DRYDOCKING OF SHIP \ large imonge the wooden cofferdam is now listed ship-repair facilities of Seattle, WENO ev reece. — . ee eee This Cofferdam was Built to Make Accessible the Broken Propeller of a Transpacific Freighter. The Padded Sides of the V-Shaped Cut Fitted Snugly against the Vessel’s Stern Frame Wash., thanks to a vessel's limping into port several weeks ago with a broken pro- peller. The about to be re- moved, in preparation for drydocking, when it was suggested that this expensive procedure be avoided by the use of a movable repair basin, or cofferdam. Ac cargo Was MECHANICS cordingly, and in only three days’ time the structure was put together. It r sembles a water-tight box, measuring a; proximately 22 by 20 ft. in plan, and 28 ft. in height. The top is open, and in on: ._ side is a V-shaped cut. Thi: great box the repair men applied to the vessel's stern by submerg ing it with iron ballast, towing it into position, and removing the ballast. \s the box rose, th: ship’s stern frame plugged th: V-shaped cut. The water was then pumped out, and the worl ers descended to the propelle: Though the 9,600-ton vessel wa loaded to capacity, the buoyancy of the cofferdam raised the stern more than a foot. FOUR-CYLINDER MARINE MOTOR HAS MANY IMPROVEMENTS To embody in one marine power plant all the features of the best engineering practice was the purpose of the designers of a new four-cylinder, four-cycle, 40-hp. engine just brought out by a Michigan builder. The re- sult is a motor of unusual re- liability, flexibility, and power, capable of drving a 42 by 9-ft. cruiser at an average speed of II miles an hour, or running smaller boats at a much higher speed. The engine weighs complete 1,350 Ib. It has a deep aluminum crank case of great rigidity, and is marked by the use of extremely large bearings and valves, giving remark able freedom from vibration. The bore of the cylinders is 4% in., and the stroke 6, in., and the operating speed of the engine for continuous hard service varies between 500 and 1,200 r. p.m. The stand ee . on Bed Right-Side View, Flywheel-End, and Left-Side View of the New Marine Engine are Seen in the Order Named in the Three Pictures. The Four-Cylinder Plant Weighs 1,350 Pounds, and Develops 40 Horsepower

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POPULAR ind electrical-starting and hghting equip- nent, and the arrangement of clutch and hrottle, give complete control from the ridge deck of the boat. EIGHT MACHINE GUNS CARRIED BY REMODELED BATTLE PLANES Flying machine-gun nests” might well the name given four DH-4 airplanes ecently remodeled for “ground strafing” y air-service engineers at Dayton, Ohio. ich plane is armed with eight guns, four yperated by the pilot and four by the server. Two of the pilot’s guns are iounted, as usual, above the engine, and synchronized to fire between the pro- blades. The other two are fixed fire forward and downward through cockpit floor. The arrangement in observer's cockpit is similar, except the upper guns are carried on a wivel mounting, and the lower guns fire the rear. According to the War De- tment’s announcement, the four planes given their service Mexican. border. rr to be tests on MOTOR-DRIVEN SAW BENCH HAS TILTING ARBOR By mounting the electric motor direct on the saw arbor, or shatt, a manufac irer of woodworking machinery has ween able to produce a bench with sev ral desirable features. The yoke, carry- both saw and motor, is tilted by a ndwheel to any desired cutting angle. his angle is indicated by a pointer which travels across a graduated are beneath The Electric Motor is Mounted on the Arbor of This New Saw Bench. On the Graduated Arc beneath { the Table Top is Read the Angle of Inclination the table top. A second handwheel raises and lowers the saw, independently of the tiltang adjustment MECHANICS RATE-OF-CLIMB METER IS NEW AIRPLANE INSTRUMENT In answer to a very actual need of th: airplane pilot, the U. S. Bureau of Stand ards has developed a littk > euT Dee, or Ste, O « w RATE4CLIMB = — vu too @rerr marr e N ‘ BUREAU OF STANDARDS The Two Forms ofthe Rate-of-Climb Meter are Shown Here. The Rate is Indicated at the Left by the Mer- cury Column, at the Right, by the Pointer instrument which, in conse quence of its function, may be called the rate-of-climb meter Details, unfortu nately, are not disclosed. It is known, however, that the action involves the leakag« of air from the meter as the airplane climbs. In one form of the invention, this leakage actuates a pointer on a calibrate: dial; in another, it moves a mercury col umn in a vertical glass tube. From bot! forms, the readings are taken in hundred of feet per minute. REPAIR TRUCK ANSWERS CALLS OF TROUBLED HOUSEKEEPERS An electric-light and power company in a city of central Ohio is maintaining a service that is much appreciated by th many hundreds of housewives to whom the company has sold electric irons, vac uum sweepers, washing machines, and similar equipment. For their convenience the company operates an auto-repair truck. Carrying a workshop, an expert repairman, and a complete assortment ot spare parts, the truck is dispatched with out charge to the home of any purchaser reporting trouble. @ The Smithsonian Institution will estab lish a solar observing station in Egypt when, as is expected, the South Americar station in Chile is taken over by the me teorological service of the Argentine R« public.

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S44 POPULAR MECHANICAL GUIDES DIRECT STRANGERS ABOUT LONDON The mechanical guides now being in stalled in the subway stations of London, MECHANICS DOCTOR IN AIRPLANE CHARTS MOSQUITO-BREEDING POOLS Man has employed many weapons in his fight against the typhoid-bearing _. mosquito, but never until recent ly was the airplane used. A medi cal officer, stationed at an army flying field in Kentucky, was re sponsible for the innovation Like a modern general, he cd cided to inaugurate his spring of fensive against the thorough reconnaissance Having secured an observation plane and a pilot, he inspected from a low altitude every square mile in the vicinity of the camp. The enemy’s trenches and strong points, which of course were the stagnant pools and ponds, he lo- cated on an aerial map held in his lap. Upon his return to camp, pest by t aerial To Learn the Way to One of London’s Stores the Stranger Colored Bulbs Indicate Immediately the Route He Presses the Proper Button. His Present Location, His Destination, and should Take while not unknown in America, are proving a decided novelty and the cause of much comment in England. As placed upon the station wall, each guide consists of a map of the city, with all subway routes indicated conspicuously. Ranged on three sides of the map are the names of all the large hotels, stores, banks, etc Beside each name is a_ push button. When a stranger wishes to learn his way to the Bank of England, for example, he presses the appropriate button. Several electric bulbs light up. A large red bulb shows him his present location, and a white bulb his destination. A green bulb shows him where to change cars, and a small red bulb where finally to alight. ENGINEER’S PERSONAL RECORD KEPT ON BLUEPRINT CHART A plotted “curve” on a blueprint chart, about 8 by 10 in. in size, showing at a glance the whole professional record of its maker, is the appropriate means used by a young railroad engineer to exhibit his qualifications for a new position. The duration of each engagement, his age at the time, and the salary received are clearly indicated by a heavy white line on thé chart, which reads horizontally in time units and vertically in dollars. Let- tered notations give further details of cach job. It is pleasant to be able to re- port that this method of application won him a position at a higher salary. the medical officer dispatched en listed men, armed with cans full of kerosene, to every breeding place observed. In this way he was able to accomplish in a few days’ time a task that might ordinarily have taken weeks NEW GERMICIDAL FACE MASKS’ MADE FOR GENERAL USE A lightweight face mask is now sold for use by doctors, nurses, factory workers, and all others whose duty exposes them to air-borne con- tagions. The mask is made in three sizes, all es sentially the same in construction. Kach is made of rubber and niekel- plated brass, and covers only the mouth and _ nos- trils. Two odor- less sponges, or felt disks, impreg- nated with a germicidal solution, filter all air breathed. The mask is held in place by an elastic band around the neck, and can be sterilized by five minutes’ immer sion in boiling water. @ If the scientist would be certain of his measurements with the micrometer cal iper, his fingers must grasp it, not by the arc, but by the handle end. Serious error is introduced otherwise, according to re cent experiment, by expansion of the are

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POPULAR MECHANICS Steel Cylinder Is Not a Submarine, Stranded in a Residential District of Kansas City, but a Compre:sed Sanitarium. It is Patronized by *“‘Run-Down’’ Business and Professional Men from All Parts of the try. Entrance Is through the Door at the Left. In the Cutaway View at the Right the Artist has Suggested the Appearance of the Interior STEEL TANK IS COMPRESSED-AIR SANITARIUM orms of protest assailed a physician cores of patients. For the treatment Kansas City, Mo., recently, when he many of these men come from all parts Sf cted, on the lawn of his home in an of the country, and in several cases from lusive residence district, a steel cyl- Europe; in the night many local business der, 88 ft. long and 10 ft. in diameter. men sleep in the tank. The treatment neighborhood wrath cooled consider involves nothing but confinement in the however, when it became known cylinder for specified periods and in speci it the cylinder was not a reservoir for hed compartments. In these compart icl oil, but the world’s first compressed ments the air is compressed to a degree initarium. An inspection of the in dependent on the condition of the patient ior now shows it to be furnished with The treatment results, apparently, in an l! the luxury of a fashionable club, and increase of appetite, a quieting of the h daytime accommodations for several nerves, and a stimulation of energy. CONCRETE-WALL MOLDS CHANGE § The standard wall machine ts 5 ft. long und 22 in. high, but shorter models are SHAPE FOR REMOVAL also made, as well as special designs for Building walls of hollow concrete en corners and joist spaces. Extensior ils the use of considerable lumber for plates, fastened with pins, may be used t molds, making much extra expense for ma ssaimmiot , , terial and labor. \ A Full-Size Concrete Mold, with Collapsing Core Cats i a | nd Expanding Walls for Easy Removal, is Seen autornia inventor has n the Center. At the Left and in the Foreground levised a movable form Are Molds for Special Shapes ot sheet steel for this purpose, in which, after the concrete is tamped, the outer sides are ex panded and the core collapsed by the simple turning of two hand- screws. The mold may then be moved to the next section of wall {

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S16 POPULAR increase the length of the machine, which weighs 175 Ib. Construction proceeds very rapidly with the use of this tool. PLATE AND PAIR OF ROLLERS MAKE AUTO RUN MACHINERY For making the auto useful around a farm or workshop, a California concern is a simple power adapter, con- spool- marketing sisting of a base plate with a Auto Power Adapter, Seen in Use Above, and in Detail at the Right ae 4 ——s shaped roller mounted across each end. The extended shaft of one roller carries a 3-in. pulley. When one rear wheel of an auto rests on the rollers and the other on the floor or ground, the differential permits the rollers to spin and deliver from 1% to 5 hp. at the pulley. The sys- tem is lubricated by compression grease cups. If additional traction is desired, a belt may be placed on the rollers. MECHANICS PULPWOOD LOSS IN STORAGE REACHES HIGH FIGURE It has been found by observations mad at a sulphate pulp mill that pulpwood kept in storage from two to three year yields, on the average, 28 per cent les pulp than wood used when it is green Pulpwood stored even one year loses 14 per cent of its value in pulp production. and in neither case is there any corr sponding reduction in the working cost so the loss is net. The only way to avoid it is to use the wood in rotation as it is received at the yard, permitting none to remain as long as a year. ROLLING DISKS OF IRON TEST ROAD-SURFACING MATERIALS For the purpose of ascertaining the durability of various types of road-surfac- ing materials, the Bureau of Public Roads has constructed, near Washington, D. C., a specially designed testing machine. It consists primarily of four great cast-iron disks, or wheels, each weighing half a ton, which are mounted independently on a small car. Back and forth over the surfaces to be tested, the car with its heavy disks is pulled by a cable from the drum of a stationary kerosene engine. The path traveled is 400 ft. long, and 1s surfaced, at present, by 49 types of pave ment, including several concrete aggr¢ gates, and brick pavements laid with grout and with bituminous filler. After many months of this very practical test- ing, the 49 sections will be examined, and rated according to the wear caused by the rolling disks. The Testing Machine at the Leff Consists of Four Great Cast-Iron Disks, Mounted Independently within the Frame of the Car. Pulled Back and Forth by a Stationary Engine, the Wheels Test Severely the Many Different Materials That Pave the Little Roadway. A Brick Section of the Roadway is Shown at the Right

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STONEHENGE GUARDED AGAINST FURTHER Stonehenge : prehistoric up of huge inding tones nea&r Salisbury, in thern Eng- ind, is now ing set in or- for the first time in its ¥sSie#r y= ouded ex- tence of ree or four h ousan d irs. A _ sin- stone was raightened in 1901, it is true, but a thorough overhauling vas made im- possible by la¢k of funds. Happily, Stonehenge is now owned by the govern- ment. During the war it was the center of a The Displaced Crosspiece is Here being Moved Back to Its Original \ Position. The Winch, Crane, and \ Many Shoring Timbers Used Sug- \ gest the Difficulties Encountered in Moving the Ponderous Stone \ a Sa eb eae NEW POSITION OF SUN HILL RIDGE PHOT ROM THE SPHERE, LONDON. YRIGHT, BY THE NEW YORK HERA This Shows How Scientists have Estimated the Age of Stonehenge by Computing the Time Required for the Position of Sum- mer Solstice to Move from the Old to the New Axis COLLAPSE large perma- nent encamp- ment. Artillery ranges and subterranean- mine experi- ment stations were estab- lished on Salis- bury Plain, and close enough to jar the re- maining up- rights and pon- derous lintels, or crosspieces. This vibration has affected, in particular, one Stiiie thons that once formed part of the outer cir- cle. The cross piece moved outward, and was lately a menace to vis- itors. To re- pair this and other damage done, the of the rOV- RON 847

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848 ernment has erected cranes and winches. Already the crosspiece has been restored to its original position, while prepara- tions are being made to imbed firmly the two score stones still erect. BLASTS AND GLARE OF LIGHT MAKE SCARECROW EFFECTIVE The old, tattered scarecrow loses much of his effectiveness because his enemies soon learn that his gun is not loaded. But Left, the Automatic Explosive Scarecrow Complete ; Right, the Explosion Chamber Lifted off Its Feed Pipe the latest mechanical guardian of the fields, designed for the serious work of saving thousands of dollars’ worth of farm products, not only carries a firearm, but shoots it off every few minutes with a violent report. At the same time a bril- liant searchlight, shining across the fields, swings around in a circle with ter- rifying effect. The improved mechanism, the first experimental form of which was described in this magazine in October, 1916, consists simply of an acetylene gen- POPULAR MECHANICS erator of automatic type, with a burner and reflector at one side, backed by a ho! low cylinder. A needle valve and air inle; admit an explosive mixture to the cy inder, and when it is full, the burner flar ignites it and an explosion follows that audible four miles away. The whole a paratus is suspended by a spring a: swivel, and the reaction swings it arou so that its light sweeps the circle. Th explosions occur every few minutes, regu lated by the water-feed valve of the gen erator. A simple safety gate in th: cylinder renders the blast harmless. Enough carbide is carried for 18 hour at a cost of 12 cents, and the water supply lasts three days. The “scarecrow” ha proven highly effective in keeping wolv: and coyotes away from sheep ranche and in clearing ducks from the rice field of southern California. BIG MOTOR BUS IS FINISHED LIKE DE-LUXE STREET CAR Virtually a trackless street car with all the appointments of a luxurious limou- sine is a big motor bus just placed in service in Philadelphia. The seating and center-aisle arrangements are those of the modern street car, with seats for 30 pas- sengers and provision for a few strap hangers. The 3¥2-ton chassis has a 192- in. wheelbase, and the body is 21 ft. 7% in. long, 7 ft. 6 in. wide, and 6 ft. 8 in high. The folding front door is operated by the driver, and an emergency door is provided at the rear. The car is heated by exhaust gas in grill-covered pipes along the floor edges. The windows are cur tained, and when necessary, weather guards are attached outside. Spring wheels are used to increase the easy-rid ing qualities of the car. A Motor Bus That Resembles a Trackless Street Car with De-Luxe Trimmings: The Door Arrangement is Seen at the Left, the Seating Accommodations and Provisions for Strap Hangers, at the Right

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POPULAR MECHANICS 849 COPYHOLDER LIGHTS AND MAGNIFIES READING lranseribing becomes an_easy task for he stenographer when back of her type- iter is erected a copyholder now sold. finger lever at the right of the type- riter moves the copy upward past a tationary bar, and a line at a time, in a y familiar now to many typists. But is improved machine has two notable itures, in addition. In place f the bar of the simpler ma- e, there is now provided long lens which magnifies height without affecting Ith. This lens may be ved back and forth until desired focus is obtained. low the lens, and parallel ith it, is hung a long ctric bulb, which illumi- only the line behind Thus, however rr the lighting of the of- the transcriber always es her copy clearly. For hygienic reasons the red are filtered out before light the eyes. is done by adding to lens. r¢ aches ingredients of the glass red-absorbing element. The Improved Copyholder Is in Use, Detail. Electric Bulb, and Magnified by the Long Lens A Line at a Time, the Cx | | 3elow. At the Top It is Seen in py is Illuminated by the SMALL HAMMER CARRIES THREE SCREWDRIVERS IN HANDLE As compact a combination of useful ls as can re adily be imagined has late ly ut on the market in the shape of a | with three different sizes of crewdriver in its handle. The hammer is all metal, nickeled and polished, = A Light, All-Metal Hammer with Three Screw- drivers of Graduated Size Nested in Its Handle h a ball-peen head of good steel and checkered grip. It is only 714 in. long ver all, and weighs but 10 oz. The three crewdrivers are nested one inside the +1 » @ : 4 ler in the tubular handle, accessible in each case by simply unscrewing a butt cap. n ocean liner plying between Stock- and New York City recently topped in mid-ocean for an hour, while the ship’s surgeon removed the appendix of the pantryman. qA holm ANNULAR UTENSIL TRIMS PIE WITH SINGLE MOTION Where the daily pie erable, as in restaur output is consid- ints and bakeries, the evident for a utensil that will need 1s enable the chef with one motion to trim a pie before p! LCll 4 it in the stove. Such a utensil has now been invented. It consists of a flexible metal ring, the in- terior diameter of which is less than the width of the pie tin. The ring is mounted in an annular holder with grips for the two hands. With the untrimmed yn a pedestal, a single downward motion of the ring prepares it for the oven. Con- The Chef has Placed the Utensil on the Untrimmed Pie at the Left. Downward Pressure has Trimmed the Pie, at the Right sisting of only two parts, the utensil is always in service, and is easily cleaned.

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850 %, ree Unwilling to Let the English Railroad Strike Interrupt Their Tour, These Americans Chartered Two Big Passenger Planes for the Trip from London to Paris. before the Departure from the Suburban Airdrome, near London. ground for the Group VALISE IS CABINET OF SMALL PORTABLE PHONOGRAPH For the use of campers, summer cot- and tourists is now made a desirable little valise-pho- nograph. The case 1s built of veneered wood, covered with im- taggers, automobile The Phonograph Resembles an Ordinary Instrument hen in Use, as at the Left. It 1s Seen Packed for Travel, at the Right itation leather, and is well protected at all corners by leather caps. With the cover lifted back, and the crank and reproducer in place, the machine will play any disk record. Ten of these may be carried in the valise bottom, or sound box, and half as many more in the top, if packed in an album. This Photograph was Taken Just a Few Moments POPULAR MECHANICS One of the Two Planes Serves as Back AMERICAN TOURISTS CHARTER LONDON-PARIS AIR LINERS Members of an American party lately returned from a tour of England and th: Continent remember as one of their pleas- ant experiences a journey that converted them all to the cause of commercial avi tion, and should hold a lesson for their backward homeland. They explain that they were to have journeyed from London to Paris in the usual manner, by railroad and channel boat. Labor trouble, culm: nating in a general railroad tie-up, mad: the trip impossible, however, and threat ened to disrupt hopelessly the party’s scheduled itinerary. Then the Americar were reminded of England’s internatiot air lines. Two big passenger planes wet chartered. Having motored to the urban terminal of a thriving Londo Paris service, the party stepped int cabins that equaled in comfort an Aner can parlor car—and in less than thre hours stepped out at Paris. @ Eight wooden freighters, built to meet the war-time demand for cargo carrie! are now anchored permanently in tl harbor of Kobe, Japan, for use as war houses. Their Japanese owners explai that they can neither operate them at profit, otherwise, mor secure sattsfactor) insurance rates.

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POPULAR MECHANICS 851 SOCIETY PRINTS THOUSANDS OF BIBLES FOR BLIND \ New York publishing enterprise little Special methods of binding have been de- known to the man in the street, but of veloped, too, so that the embossings are tremendous importance — - » afflicted thousands in \merica, England, japan, Siam, Armenia, Spain, and Arabia, is the printing by the American Bible Society of scrip- tures for the blind. Not drop of ink is used in the process, every page of the great volumes being mbossed that it may be read” by the fingertips. - : —_— a . he printing is done on The Ordinary Bible, in the Foreground, Rests against an Embossed Copy in ordinary cvlinde . of the Book of Psalms. In Rear Is a Complete Bible in ordimar} cyli der press, for the Blind; It Weighs 200 Pounds

modified by cerT- tain of the society S Revised Brai ' Gradt One and a Half seldom crushed or entions. rhe auesai . ; otherwise = . abt a c ; : ite iper, very thick Numerals 1 2 3 ‘ 5 4 . . Pa 2 deformed. | ne So- nd heavy, is dipped Ling 1 lek Ae a ee ee ae ciety has previously in water; fed, then, igueeess & | wm 8 oC ‘+ >. a used the various to the press, it is Lint 2 ;. ee mere ce ee RU Re 2 ee point-print systems ressed between a AlPhabit u v y z P, é a : a and the raised let- iss embossing Lint 3 SS Heese S&S eS ter types, but is 1 bl J te ant t rubber w, ti . 7 ; eck 8 8 Seeie now preparing to l. Both sides of a .. See ee eee me ~ Bp oe publish a complete he paper are used, wn . bible with the uni- ' 1 Punctuation , >; : . Wy SR exe | 7 ni inks to another coas £3: = €°s #& sae « Cad versally recom ipplance which ; , ; mended “ Revised RRR ; HyPhen. ete. jiorfraction & numeral dae ' - > 1 he rrugates the pa- ; : 4 . , } Braille—Grade One Lint G : BE. an oe - The dots or ind " Half This haracter are ; a is an adaptation of ° : <del re This Is the Revised Braille Embossing System Which sa - la 1On ' iced, of course, the Society will Use in Publishing Its Next Bible for the Braille system the “hut ” ’ the Blind. This System is Universally Recommended ular in Fi Nne¢ lumps ot r . sO popular lu - ‘ and Commonly Used in Europe . corrugations. rope. Its use, the society believes, will bring the blind of \merica to a more intimate icqu iintance with blind literature of other countries l TO MAKE SYNTHETIC AMMONIA BY HIGH-PRESSURE METHOD The world-wide interest in the produc- ‘ , mm ot itrates, necessary tor tertiziizers and explosives, finds expression in Great Britain in the plan to construct immedi- itely, at West Cumberland, an enormous plant for the manufacture of synthetic ammonia from nitrogen and hydrogen. \ new French process will be used, peculiar for its operation at some 15,000- lb. pressure, whereas the \merican ind German processes use only 2,500 Ib. or less. The high pressure takes more power, but multiplies the rate of production | four. British rights to the new method ae SS ; . iden eRe ae a stent ~ The Blind Instructor is Teaching Her Armless Pupil have been acquired Say \us tralia, New to Read One of the Bibles with His Tongue Zealand, India, and South Africa.

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POPULAR MECHANICS The Improved Aerial Flare is Seen, at the Left, as Carried in the Cockpit of the Airplane. The Next Tw Pictures Show How the Airman Drops It Snapped Shortly after Release, the First to Show the Tube, the Second to Show Its Slow Descent. ODD FUNNEL FOR GASOLINE GIVES IMPROVED FLOW A funnel provided with an annular ait chamber at the top edge, and four intet nal ribs to break up the swirling move ment of the fluid, has been demonstrated four times One model of the sup by its inventor to pass gasoline as fast as the ordinary form with a 144-in. spout took cart ply from a 2-in. hose, and passed 10 gal in 11 seconds. The same size funnel of common shape needed 44 seconds for the Bi conveyance of the same number ot va over the Side This Improved Funnel, with an Air Chamber at the Top and Four Internal Ribs, Passes 10 Gallons of Gasoline in 11 Seconds through a Nozzle of 144-Inch Diameter of the Fuselage. The Pictures at the Right were Parachute at the Moment of Its Emergence trom the The Illuminant, of Course, was Not Ignited IMPROVED AERIAL FLARE GETS OFFICIAL TESTS Of the aerial flares dropped by night bombing airplanes during the lz months of the World War, so little h been that considerable inter: attaches to an American invention of tl sort, recently tested by the army ar navy. In general operation the new fla: is rather conventional, employing a a pyrotechnic illuminant, and a sill parachute. It is, however, peculiarly co pact, easy to manipulate, and posit rect revealed action. As strapped in the cockpit cabin of an air craft, the flare is seen an aluminum tube, about a foot and half long and three inches wide. At top is a handle by which the airman the apparatus over the side. The tt dropped from the handle by pressure the airman’s index finger on a small t ger. Immediately the tube tu ( end for end, while the parachute c out and is opened by the wind. chemicals in the heavier end are ignit + ifter the desired length of fali, by a 1 which has been set previously by tl! airman. The settings may range frot 10 to 10,000 ft. The light burns fiercely for five or six minutes, illuminating a1 area one-half to two miles in diameter Phe visibility produced by the flare 1s that of a bright, moonlit night.

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| ; POPULAR MECHANICS 853 ODD MACHINE SEPARATES BEANS AND MUD for removl o the little pieces ried adobe mud that are shipped th bear from the harve ds i W Cc! DI rduce com h S ) ‘ | 1 ¢ eC ed t le se 4 lacil ¢ \d tage 1 t en of the fact th exte rT the be l rot \ that ot the mu nt is al vs rough d | ( ) ca t 1C¢ Ive i In | ‘ ) 1 from the re 10 mital, re evlit let he exterior of ( eT 1 sO 1 rughe ed, . - , ' , 1 By Means of the Friction Clutches, Two of WI d » Te ‘ ind 1e MIN are Seen Above, the Speed of the Cylinders is So ted at ha point. tha Adjusted That the Beans Fall Past Them, While Mud . : Particles Ride Over, and Fall Down the Other Side ) ns ill mast he C\ the mud _ particles t he ed ~ r and fall d ‘ ie three cond t rhe 1 is necessary Tot ere determined only t locom e 1 | ‘ ‘ 1 or dea = (i ) t el cy] ae rs ire ‘ é beneath § the ‘ ed of the first i ] fy) n Oo! the secort d I 1 of the third 110 ugh these s veeds may : ] os * This Photograph was Taken during the Erecticn of the Sey tered at will by means of ng Machine to Show Two Sets of the Roughened Cylinde ction clutches. Some adtust [The Separation of Beans and Adobe Is Progre ve, f l ; , f to Bottom. The Cylinders are Driven, through the (¢ ‘ nt ] Nece ify 11 bACt oT Seen at the T at Spee is That Increase I ewise ftror | ( ( ed to Bottom SMALL TRACTOR PUSHES GOLF-COURSE MOWER \ new form of small garden tractor, lar in general construction to the cylinder, 4 ] m Cad , ae 4 me The Small Garden Trac- ih; ye ) ) tor, with a Single-Cyl- bs tee ‘ inder, Air-Cooled Engine, - Pushes a Triple Mower That Cuts a Swath Seven Feet Four Inches Wide rt é d | +7 ‘ ~ . Fits in, ng Meas Nees pra

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POPULAR MECHANICS NEW LINOTYPE-MATRIX GRIP CONGRESSMEN WEAR HEADSETS CHANGES FONTS QUICKLY AND GET ADVICE BY RADIO —_- ~~ BLAZING CARS ON TRESTLE PERPLEX FIRE FIGHTERS The Remaces ef Twe ef the Tiree Coal Cars are Seen em the Trestle. The Third is Hidden Or the We the Chute. te che Le Thee Blewered Poarmeer of the Cars Made the Werk of Five Fire Comores Bxtremety DeScult. The Fire Finally Bereed Iceelf Out after Destreying wee Chete acd 2 Number Pusseager Cveectes

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— POPULAR MECHANICS ; | ment by Which Minute VariationsfromRegister | in the Three Colored | Images on the Screen | are Corrected by an | Assistant: The Centra Red Image is Fixed, and the Two Adjustments Are for the Green and ’ >iue RTESY OF LHL USTRATION he Complete Projection Machine for Making olored Screen Pictures by the Three-Image Metho t Has a Single Condenser Lens, But Separate Objectives for Each of the Colored Images oad OP hae | MOVIES IN COLORS OF NATURE BY TRIPLE PROJECTION By superimposing three pictures—a blue, a red, and a green—in register on the creen, a French motion-picture producer finally has evolved a practical system of natural-color projection. Each film pic ture is approximately 1 by '% in., instead of the standard 1 by 3 in., and three of . , them in consecutive order constitute a three-color unit, 1 in. wide and 1'% in. gh, necessitating double the usual ma e speed, e machine has a gle » and condenser lens, but three o tive lenses and three color low e middle or red | ire 1s used the } Vv pos yn, i mechani f cted na { d ement Lhe 1 r or blue 1 the | r or green | tures are sted i renious ele: trical de € operated by an t near the screen, whenever a slight devia tion from register is perceptible. A method has been found, but not disclosed, for equalizing the time required for de- veloping the different color exposures, a considerable problem, as they are all on one film, and so must necessarily go into the bath together. The film itself is not tinted, small color screens being used uu The Electrical Instru- i} At the Left Is a Typical Picture Unit of the Three Color Film, Containing a Blue, a Re ar a Greer Jivision At the Right Is T dt tive Unitary Mounting and Adjusting ew or b Green and STRIPED AIRPLANE HANGARS IDENTIFY LANDING FIELD Airplane hangars, in t The Broad Stripes of Red and White Make These Hangare Easy to See from High in the A ar Distinguish the Airdrome from Others in the V

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POPULAR MECHANICS ary. So each | ling 1 idorned, VALVELESS PUMP KEPT PRIMED barber-pole fa hion, vgn ulternate gpk BY TANK ATTACHMENT

red and e, so that the airman « efore their neighbor Centrifugal pumps, and other forn ithout valves ire kept alw avs re | LIGHTS ON INSTRUMENT DIAL tart by a priming attachment 1 . “9 brought out. trimmed. A ready for another priming clinometer of the gravity. ELECTRIC WELDING REPLACES vd ahah RIVETS IN STEEL TRUSS

tvpe, x os Oe iarkable for \s rivet holes necess irily represent the absence weakest points in a steel Structure f all moving Brooklyn engineer has undertaken iris, but lemonstrate that electric welding even 1 way in whicl ractical and superior substitute for t make yuri If the plan rivets ordinarily used. He has b is tra t Le rmal flying le nple fan truss with a span of 40 with wings horizontal, a green light at vhich there are no bolts or rivets wl the center of the dial burns. steadily ver. All the steel members of the tru Chis green bulb it the intersection of a were assembled on the spot and weld vertical and horizontal row of red bulbs, by the are process. The strength of tl which, with the « ishing of the green structure was tested by loading it wit bulb, indicate deviations from normal indbags and men to a total weight flight. If a wing sinks, for example, a 48 tons, evenly distributed over its sut red bulb of the horizontal row flashes face, a burden which it carried wit} if the tail LOW thi rtical row an trouble. The method is declared no t. ble to any steel bridge-or building

ee ————— “ “SS ye, + noe / Soares ~ &*. A Truss of Structural Steel, with a Span of 40 Feet, Constructed by Electric Welding, and without Rivets or Bolts: It is Seen Supporting a Load of 48 Tons. The Insert Shows the Welding Operation That Takes the Place of a Rivet at Each Junction Point

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POPULAR MECHANICS 854 BRIDGES AND PLATFORMS ADD TO WHARF'S CAPACITY The freight-handling capacity of one platforms is rolled to the door nearest large wharf on Seattle’s water front has’ the ship. The ship's crane then unload been practically doubled by the installa- the cargo upon it. These platfor nei tion of several movable platforms and dentally, are high enou ny . the bridges, which make accessible the second freight cars that frequent ; \ on floors of transit sheds and warehouses. the whari ' ; tj =n The platforms, found on the wharf front, are rolled into position on two rails, one along the wharf edge, and one along the outer walls of the transit sheds. When th second floor is to re ceive a cargo, one of th: Two of the Platforms can be Seen in the Background. When the Second flanr Floor is to Receive a Cargo, the Platforms are Rolled, on the Rail Seen at the Right, to the Doors Nearest the Ship's Crane THREE-WHEEL On the streets of Ber- lin, laboring at present under rather confused traffic conditions, a curi- ous three-wheeled taxi- cab has recentiv made its appear . Though t | has all the 1 | ments, the di g ¢ ipment 15 pr separate at attached . olen front r-cooled « £ out in the open v it covering of any kind, is chained directly to the single wheel which serves for both drtvit 4 and steering. The new cabs are expected to ++ . vi iV 1 cay A Thr e-Wheeled Taxicab with a Singie } n> Whe For j ‘ ng solve at least some of the and Steering Unit: The Air-Cooled Eng.n¢ Carried in the Open, w: t citv’s ye xing a Covering of Any Kind, and Its Shaft 1s Directly Connecte he Drive af perplexing trafic wheel with a Chain. The Odd Vehicle is Used in the Streets of Bert problems. Germany

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TREES TO FO ODD WAR POPULAR RM GEORGIA’S MEMORIAL

<A.CROSS ||; OF TREES Ce J Reoaw’ a? * Rain Leas / uy y Pmacond | i &D aden tee ie a Paani Sa eatin wbgink +" 8 \ th = le) ‘Se “ \ ay ‘ 2 f/ \ 1 : a\ K “Mt } : th. $i tit iis ie thi aie ie ait ‘ye He tis eee ae -

Vv

MECHANICS nd w t for ") < rie | in WALNUT SACKS IRONED TO RID THEM OF CODLING MOTHS REMOVABLE POWER PLANT IS FEATURE OF MOTOR TRUCK

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Air View ef the Big U- Bowl Stadium, to be Built at the ‘Raven of ae. Seatt! ¢, Washington in the Background and the Cascade Mountains on the Horizon: ture will Seat 50,000, with a Possible Ultimate Capacity of 78,000. 2 ol with Lake The Reir ced-Concrete Struc- The Inner Oval Is a Gees ter-Mile Track WESTERN UNIVERSITY PLANS LARGEST STADIUM By LAWRENCE WILLIAM PEDROSE LANS have been completed for con- struction at the University of Wash- ington, Seattle, of a stadium with an ulti- mate seating capacity of 78,000 persons. The first unit of the project will comprise an open-end bowl, seating 50,000. A pos- sible cantilever overhang will add 1,300 seats, and by inclosing the open end 15,000 seats more will be added. “Washington Field,” as the stadium will be known, will cost $500,000 for the first unit, its financing being accomplished without solicitation of direct contribu- tions. Profits from associated students’ activities, aggregating $101,000, went into of fund; all other moneys, including 7,000 pledged by alumni residing out- side the city, was raised by the sale of bronze souvenir plaques entitling th holders to reserved-seat .privileges for periods of two to five years at every base- ball or football game, féte, pageant, mili- tary or naval or public gathering Washington Field will open to the southeast, and run southeast and north west. This position was chosen for three reasons: because of the angle of the sun on November 14, the kick-off of the big games; the beautiful view of Lake Wash ington and the white-topped Cascade Mountains, and the topography, which makes for economy of construction. The proven features of existing stadi- ums will be incorporated in the plans for affair, wk Washington Field. It will be constructed entire] of reintorced concrete lhe en daa of the bowl will be flattened like the Princeton stadium, bringing the seats closer to the freld, and the sides will be slightly bowed like those of the Yale bowl, bringing the spectators closer to gether. The arena will slope 35° from Lake Washington and will lie 1,000 back from the water. The ground ar 1 the stadium, excepting the open end have a grade of 60 per cent. The rise 36 ft. above the arena ntrance to the seating area will he t } distributing the idience é 1 below. The arena will cont i 44 1., or on quarter mile, ell t 2 d.. ¢ one-eighth mi t trac " i ball or ba ll f t ( dressing-room accor l provuece for at least 350 park space outside 1s pr motor cars. The public will have acce from three sides. The location 1 ] cent to the Tamou Lake VW“ ashi ton Canal, and the water apy celled. The University of Was shown a remarkable body. In 1901 thi 201. 3y 1920 the number to 5,000. Plans for the proach is une hington h growth in its student students numbered had stadium increased were 8s9

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POPUL NEW GAS FURNACE ® 4 a E AR MECHANICS EFFECTS GREAT ECONOMIES

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POPULAR MECHANICS 861

ar ’ ~ _ > » ails» hee - « & = 4 f eZ ¥ — . * ‘24D if - ie —— ~ Q ._ Experimental Cotton Mill Installed in the Laboratories of the Bureau of Standards at Washington, Where the Effects of Humidity and Other Conditions are being Studied, with the Aid of Automatically Controlled Apparatus, for the Benefit of American Textile Manufacturers EXPERIMENTAL COTTON MILL across the gap and open the bucket gate, > HELPS TEXTILE INDUSTRY discharging the load. The slackening hoist line then closes the gate and re- All the operations in the manufacture’ turns the apron, and the empty bucket of cotton textiles, from spinning to descends for another load. weaving, are being performed under a variety of artificially produced conditions by an experimental mill installed by the U. S. Bureau of Standards. Among other subjects of close study, the effect of humidity, controlled by special appa- ratus, is being investigated, and analysis made of the properties of fabrics pro- duced under different circumstances. The object of the research is to aid do mestic manufacturers to meet the keen foreign competition which is destined to

+4 affect the textile market in the future SIMPLE MAST REPLACES TOWER FOR CONCRETE HOISTING To effect economies in the hoisting of concrete, for building operations which do not warrant constructing an elevator tower, two Indiana inventors have de- signed a simple mast and chute arrange- ment that is entirely successful. The mast 1s erected in a depression, permitting the | concrete to be dumped directly into the

bucket, which is then hoisted by a cable. —— : : pee When it reaches the chute. it trips two The Concrete Bucket is Hauled up the Mast and $ Automatically Dumped into the Chute, Making a Tower Unnecessary levers which, in turn, extend an apron

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&52 POPULAR SETTLING SILO STRAIGHTENED BY SHOVEL AND AUGER } } ] yor} é eemingtv dithcult task OT straight- “i concrete 1lo, 46 in. out hae ' plished The Guys have been Strung in Preparation for the =xcavation Which to Vertical. Returned the Heavy Tower A Plumb Line is Seen at the Left a Missouri contractor with little l irl ettort and in three days’ time. The tower meas- ures 16 ft. in interior diameter, has a 24- ft. water tank in the top, and is imbedded only 42 in. in the ground lhe contractor first anchored the leaning tower with foui protective guys three on he high side The foundation on the same ide was then laid bare by the ex¢ ition of wide trench. Into the earth beneath the un- dations, and at two-foot intervals, work- men with augers then bored horizontal two-inch holes In a few hours these holes were obliterated by the weight above them, and the tower had returned halfway to vertical. The operation was repeated, and in three days the sile was in proper position. Finally, to prevent a recurrence of the settling, the contractor widened the base of the silo by setting MECHANICS iron bars into t foundation, 1 and at 12-in. intervals. These bars fi the reinforcement for the concret quently poured upon them. The a wide flange that acts like a sno to hold the weight above the supporti surface. BLAST CONCRETE FOUNDATION WITHOUT DISTURBING SITE In making recent additions to g power plant Ot a iarge Flor da phos mine, it became necessary to wreck concrete foundation of a 1/5-ft , without disturbing the c g lay bed or of the valuable machinery in close | imity. The foundation was 7 ft. de and had been poured in three runs spectively 22 ft., 17% ft., and 16 ft. diameter. With hand drills, holes bored 30 in. apart and 30 in. deep, or lan the top layer. Wit! deeper tl ound stick of dynamite in each h fired, the uy layer spl blocks. The ind 36 in. deep, to bottom | This cl laver and the upt half- | trica removed vere 36 in. apart well into the broke up the second h lf of the lower. \ fin l blast in at holes cracke d the remat de r ind if removed with hoists. railroad ties above débris in the pi 17 2 ity per easily next aver. He avy t each im t nie 1 charg. ke CANS ALONG RAILS HOLD SHIP’S HALYARDS Galvanized-iron cans, about two f gh, have been fastened at intervals t the deck rails of a ship which plies the waters of San Francisco Bay. In these containers the maller S ropes, or halyards, ire stored when not in use. This sys- tem the own- ers prefer to the tradition- ] | practice of coiling the unused cord on the deck, because the c: and rain from the ropes, and them. The cans find favor with th ors, too, as a rope, when dropped tht the hole in the can lid, obligingly « itself, ns keep

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POPULAR MECHANICS 863

Facing the Potomac River and the City Washington, Stands the Memorial Amphith the Arlington National Cemetery The Chaste Beauty of the Structure is Accentuated by Green Groves of the Cemetery Preser

eater f

; ee i

PHOTOS COPYRIGHT, UNDERWOOD & 2ERWOOD The Elliptical Open- Air Auditorium Seats 5,000 on M arble Benches Ba <¢ of the Rostrum Is a Re Hall Which Opens upon the Colonnaded Porch Seen in the Upper Pix e. Beneath the | trum A Chapel and the Vaults Wherein will be Buried Those Who have Serves 1 Their Country th D he memorial amphitheater and chapel upon a high terra Her in the Arlington National Cemet ry, the nificent vie. f tl Potor | cornerstone of which was laid on Oct. on the other rf tl Lit vty 13, 1915, is now practically completed. and the city of Washingtor White-marble seats for 5,000 have been framed by the tre installed in the elliptical, open-air audi- torium; the surrounding pillars and @ Japan has just opened a large arches are all in place. Beneath the ros- less sending station at Haranor trum, or stage, the finishing touches are a receiving station of corr being applied to the chapel, and to the at Tomioka-chi. in Fukushim vaults wherein will be placed the re- The antenna mast at each oft 1 Of mains of those who will have served their ft. reinforced-co: country with distinction. Behind the ros- of the new statior thout 8,00 trum is a large reception hall, which opens a day, or 600 aver

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B64 POPULAR MECHANICS DENDROGRAPH PROVES VALUE IN ACTUAL SERVICE Invention of the den- drograph, an instru- ment for measuring tre growth, was announced in Popular Mechanics prongs, follow movement, and son a recording pen ag arevolving cyli The motion of thi Magazine for July, 1919. magnifies many i 1D ible to ce that of the tree. ( CY ind trate th by the dendrograp! appa! is. refined kept a self-recordi: the course of const thermometer, whi 1 durin he ] gisters temperat nont] t ous |} fluctuations, and | 1 ex makes it possible t The duct from the dend: ( ! ich encircles sraph readings chang hout cl t h« due to variations tree trunl yrmed of temperature ] ed rips of a metal illoy little iffected by 1. . ] ] | \ Piass cave has b« fitted to the cockpit Major Shroeder’s | temperature changes. Three metal contact points, borne bv as 4 Pere airplane. It w many strips, rest lightly protect the holder of th against the bark As ii Guudoginh ngShown seit As. altitude record when the tree expands or con Which Records the Changes in Girth. attempts to better fh tract these points. or Below is Seen the Self- Recording Ther- jyark a | Mark. mometer SEAGOING ELECTRIC FREIGHT TRAINS By A. M. HOFFMANN A CONSULTING engineer of New That is to say, the floating central sta- York City has shown that it is pos- tion would supplant the towboat, as w: sible to adapt electric traction to marine understand that type today, and furnish transportation in a way that will make’ energy to a string of barges, etc., whic! the towline obsolete. Instead of tugging would enjoy much of the maneuvering hawsers he would use light-weight elec- facility ot self-] rropelled boats. In short trical conductors capable of distributing instead of aa caed the whole burden of energizing current from a navigable, cen- traction upon the single screw of a tug he tral power plant to dependent craft-fitted would distribute that effort among th: \\ ith thei ir own motor- driven pro] pe llers. various propellers of the convoved floti The System of Electrical Sunesiien as Applied to Two Yachts: The Leading Vessel Runs by Its Ow: Motor, Supplied with Power over the Cable fromthe Other Boat

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POPULAR MECHANICS

| Le iby ee © 7 ¥ MoT fa ET ee as - t wos ; i A EE oan = EE, ILL i ee ~ EER > ls a By on ae LEE Tors TOILET! | FOLDING BERTH UP * “*& 3-KW EXCITER ’ > ; BE p>, re i} PASSAGE °& V9? 9 8 PUR e . Le LE HL COCKPIT . —y if e *) ; : aft ot ui yal Hi

. We ‘ Zs, g z (MOOR | | >. ie AN i : rs Ay v4 acticabilityv . Tankers, Connected by Conductor able 1¢ Insert Show | : ne practicability, or Arrangement of Motor and Propeller on the Depen V this system of multiple- unit propulsion applied to water-borne The power ship “Dawn” trafhe has been established thoroughly by with an 80-hp. gasolin : the functioning of two yachts built by direct-connected to a )-! the engineer and put through their joint turning 450 time minut ( trials a few months ago. soth of these this generator is fed to a 2) boats are alike in their hull construction, motor which drives the “Dawn

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S66 POPULAR MECHANICS propeller. The sister boat, the “New would likewise carry a paying amount « era,” is also fitted with a 20-hp. motor freight if designed as a canal boat « which actuates the boat’s screw, but cur- deep-water barge. As a prime mover f rent for this service reaches the “New passenger and express vessels on rive! Ikra” from the “Dawn” by a flexible, lakes, sounds, and other waterways waterproot cable less than an inch in di- navigable central plant would not be « ameter. This cable is carried by a reel at pected to carry cargo. Its reason for the bow of the “Dawn” and led thence ing would be to maintain a well-nigh c over an elevated pullev to the stern of tinuous service by delivering a day b the “New Era,” where it is plugged into say, and starting back after a very bri the local propulsive circuit. Surplus cur- delay with a night boat. Calculatio: rent is directed to storage batteries, from show marked possible economies in pow hich energy is drawn, when the engine’ costs and notable savings in time. Is stopped, tor lighting, cooking, and separating the power ship from the d heating pendent craft, fire hazards are decré 1 commercial service, the power ship and insurance charges reduced. INGOT WEIGHS OVER ONE HUNDRED TONS The recent manufacture of an enor-_ specially constructed flat cars to the for mous roller for bending ship plates affords ing shop. Here it was heated for hours. and then sh Lp a f1ant steam-op hydraulic press of 2,00 ton ral o The ti roller is 35 6 in. |e + 9 . : and OU 1n, n diameter ind has total veigl f } tO} t ! @In New Zealand ha been found two toweri! kauri trees, each contat1 ing twice as much sav able timber as the largest California giant, 01 about as much as thre acres of good Europe forest. The Giant Ingot, Five Feet Seven Inches in Diameter and Weigh- ing 119 Tons, being Shaped in the Hydraulic Press a good example of the sizes handled in modern forging operations. The octagonal-shaped ingot for the roller, produced at a New Jersey steel plant, weighed 119 tons as it came from the fur- nace, and was 5 ft. 7 in. in diameter. The special mold in which it was cast was about the same weight. Che huge steel mass was transported a considerable distance on The Ingot as It Came from the Furnace, Where It had to be Heated fo: 110 Hours to Prepare It for the Operation of Shaping in the Press

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POPULAR EXTINCTION OF NEW MEXICAN WOLVES NEAR AT HAND Like outlawed 30 crafty wolves, fittest survi numerous - elusive criminals, MECHANICS 863 PRIVATE AIRDROME PREPARES FOR NIGHT FLYING 1 of the improvements that must Lik bie i rt i¢ i iil i mmon it commercial aviation

ks, still roam the é ot Ne Mexico, reving on live-stock I ight, ind hiding

ivsterious lairs by day for years” thi cunnil t ha , : 14 ot his vork on foot Not only ould 1 1; a gasoline engine fail to meet this cons tion, but a crew of two men would be 1 eeded. ‘ \\ he na director of a school of wireless in Washington put on a musical program the other night for the benefit of his wife at home, 30 students of the school called back to report that they had heard the music in their own homes. NATIONAL SAFETY COUNCIL PATENTS DANGER EMBLEM

| 1, ble m t } ed To » ot] (oOo } ed ( ‘ ed ict ) ] pene DANGER use almo HOT TANK ther - symbol id ‘ 1 ppropriated 1 dver rt | eT purpos¢ } ] | introduced mM «mat meaning is being dr eign workers by the These display the it, the word “Danget translated into everv tongue I local use.

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868 FARMERS USE SIMPLE METHOD OF WRECKING OLD SILO contemplated in Iowa of a necessitated one, a erection farm old of new the frame-and- considerable size. ' . 4. ] haa -_ n1 ] ‘ ire root hace peen removed, a wife " of the ucture A Cable Looped around the Top of the Silo was Attached to a Powerful Windlass Operated by Two Men Then the Two-by-Four Studs were Knocked the Foundation, and the Silo — Started Over POPULAR MECHANICS BRITISH DRUMMERS TO BE TAUGHT 1,000 LANGUAGES \ scheme of tremendous importance to Britain’s far-flung commercial interest has been approved by the senate, or erning body, of the University of don. It for the organization of a Institute of Phonetic similar in many to the school Hamburg 10 oO UV Lor is respect founded vears ag by the enterprising Ge mans. In this Hamburg school Germany's travel ing salesmen were taught all the languages spok« in German, and of the British, So, too, the in mi coloni s London i to prepar: salesmen fot commercial ot stitution is British further quest onies, co Britain's col = by giving them in all the 1,000 languages and innumer- able dialects Ss struction 1n Loose from 1) 1 pork through the empire. hat this shall be done effectively the new institute is to evolve a standard system of phonetic symbols These will assist th British salesman to real- ly accurate pronuncia tion of the language or dialect he is to use. This systematization the instt- tute is preparing to carry forward by every means known to science. The phonograph will perhap be most used. Motion teaching The Silo Fell So Heavily That It Lost All Semblance of Cylindrical Form, and Lay Flat on the Ground. cable was passed around the top and connected to a powerful windlass oper- ated by two men. Then the two-by-four studs were knocked loose from the foun- dation, and the silo went crash. So heavy was its fall that its walls lost all semblance of cylindrical form, and lay flat on the ground. over with a @ A new welding electrode has a chemical coating which saves the steel being welded from attack the oxygen and nitrogen of the air by its superior affinity for them, and by setting up an outward current of gases at the point. by Workmen Here are Preparing to Clear It Away for the Erection of a New One pictures will be taken, also, to show the forma- tions of the native throat when talking. From these plaster-of-Paris molds will be made for close study. From lines draw by the kymograph, which traces voice vibrations on a smoked drum, the most outlandish tongue will be translated. and mouth pictures SELF-CLEANING WHEEL FOR TRACTORS An improved type of tractor drive- wheel, of recent development, is equipped with lugs which work in and out like spades from an eccentric on the driving axle so that the wheel will not clog in

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POPULAR MECHANICS ! ~ 2 te, mgm | ljustable Self-Clear ccentrically M CISTERN FOR LIQUID MANURE STORES FERTILIZER ROADSIDE WARNING SIGNS BEAR ACCIDENT RECORDS ling that many motorist 1 1) m western bile club | is Removing the Liquid Manur carded the “on tern in Which It has Collect peeeePT Bei Means of a Pump, for D ings boards at crossings curves lar “hazard acquaint torist with the exact number of which have occurred at that spot 1 + the preceding month. f

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POPULAR a spray lhe e ‘ Te he manure each ada t ‘ ters of the barn are flushe and it can be removed to the field in spare moments with much less labor and waste than if it were dumped on pile exposed to the weather and i¢ h: ed to the freld ina sj reader. RAILROAD USES SEMAPHORES OF LOW ALTITUDE C 1 . i o - pattnsl ’ I npnore TeEcently 11) ried on a vestern railroad are entirely different in : : tit ) ts hs w-Altitude Semapnores are Declared to Be Safer Because the Engineer Sees Them as He Watches the Track its inn hig! above the rails These signals, « short, substantial poles with concret¢ ase placed between the tracks, are o low hat thev come within the en- gineers normal line of vision as he watches the right of way ahead, from which he has no occasion to lift his eyes. lor this reason the dwarf semaphore 1S nsidered by its advocates to be safer an the higher form. MECHANICS ‘FIRM “DEMOBILIZES” TOPCOATS FOR BRITISH ARMY OFFICERS The swagger cut of the British a offcer’s regulation overcoat makes | sible the maintenance by a Scottish d: ing establishment of a _ service that proving increasingly popular with det bilized overcoat omecer.rs., On through recelving an ar! ’ the hil and dyes the parcel post, removes all military insignia, a fast navy blue, dark brown, or b as. the sender has lirected \n « ‘ tailor then fits the coat with a velvet ¢ lar of proper color, sews on ne and presses the garment. lhe resu modish overcoat for civilian wear, MAIL PLANES CARRY POUCHES IN ASBESTOS CONTAINERS IR bl | vemovabile One-p1lece isbestos linn ror the cargo cockp ra protec letters carried by 20 a ines of the at mail service. lo the maki Y of each ing went 10 vd. of heavy kha clot is many vards of asbestos cloth, weig 214 lb. to the square yard. Each is put together with 3,000 copper rivet nd is fastened to the fuselage mem! by thin strips rews; it hold eight of the ind sc largest mail pouch: steel To determine the fire-resisting qualiti of the new asbestos containers, offici of the Post Office Department recent subjected one of them to a severe te Inclosing a pouch of letters placed in a barrel of oil-saturat: When the blaze had 1e pouch was’removed and the examined. Most of the letters harmed, only a_ few packages bet ‘harred during the experiment dummy was shavings 1 } i subsid t content were PYRIGHT HARR 4 tw Officials of the Post Office Department, at the Left, are Observing the Fire Test Recently Applied to the New Asbestos Containers. At the Right, One of These Big Bags is being Lifted into a Mail Plane

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rh latest self-pro- nelled invalid chair is of English manutacture, nd falls short of lassification an auto- mobile. It is of electric pe, current for 20 miles just as eing upplied by stor- ri cells beneath the o1 tabl ingle seat. he oto1 mounted h fro axle, by means gear. With ( f taxing the 5 rencth a Though Intended for the Use of Invalids : . Right is Well Adapted for Promenades along the “Bo: ec, the con- and Seat have been Removed, at the Left ) é ré ] ced to le \- Storage Cells long handle; rheostat arm The Wareh« Doors Fold Hori- zontally, Leaving the Sides Clear and Making a Shelter over the Loading Platform pus¢e tage POPULAR \1 MECHAN NEWEST AUTOMOTIVE CHAIR DOOR WITH FORMS WAREHOUS ICS \iucl ne helter obtain« the plan, adopted citv, of mak horizontal ind hinging ( the door ( ene half, the fold 1 porch TOO! ¢ CT! tecting the goo rain. With thi le of the ireh« , the Self-Pr« Show t eed he M Chi HORIZONTAL IS EASILY OPERATED FOLD E SHELTER CITY STREET SPOUTS FIRE AS GAS MAINS LEAK Chicago had its own “Valley of the Ten Thousand Smokes” recently when a_ stray spark ignited leaking gas from mains heneath a south-side street. A olley of seismic explosions, that threw manhole lids high in the air, was followed by general igni- tion of gas seeping through cob- blestones, up sewer drains, and out of lamp-posts. For a_ time the entire street was ablaze. When the fire companies arrived to extinguish fires in surround- ing houses they flame, 20 ft. high, gushing from three manholes, and smaller jets rising rom drains and lamp posts. The fire was subdued by shutting off the gas supply. found pillars of PYRIGHT, INTERNATIONAL FIL™ SER Burning Gas from the Leaking Mains Sometimes R than the Housetops. After Surrounding Houses ha Fired Repeatedly, the Gas Supply was Shut Off e H bee

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POPULAR MECHANICS SIMPLIFY FREIGHT TRANSFER BY NEW SYSTEM . c i>, L Lilt Lille T Containers and W 1 Railroad Fr House beir with G T t tt | 1¢ TT towa ( ‘ 66,000 freigh exclusive tern | duty, and save 300,000 switch- Ing movements a vear— figures that indicate the size of the prol lem as well as the ettic ic ney of the new method Con- tainers of steel-rein- forced wood, {14 long, 8 ft. wide, and 7 rte high, like diminutive freight cars with casters instead of trucks, are used to transfer the ods, Doors at ends PROTOS COPYMGHT, UNDERW odin and sides permit rapid - Trucks with Container Bodies Going Forth, under Dispatcher’s Orders loading, up to ab Mut tour to Transfer Their Goods to Other Railroads

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POPULAR MECHANICS 8% PLAN COMMISSION OF HEALTH ONE-LEGGED SWIMMER IS OF WORLD-WIDE SCOPE INSTRUCTOR ON LINER One of the most interesting of all the The amputation of a leg seems to be undertakings of the League of Nations a handicap or an inspiration, just as th council is its project, just put under way, of forming an inter- national health commission. Pro- ~ fessional attitude on the subject Ned is indicated by the practically simultaneous visit of an Ameri- ~ can physician to London and Ww continental cities in search of One- support for a W orld conegr;ress of i hysicians and surgeons, a plan 1] iw : ell received in all quarters. At at Significant also was the meeting — Geneva, on March - of the general council of the League of ted Cross Societies, of which the 4 { zecho-Slovak Red Cross is a member. The typhus situ in Europe, to which ind lual nations are now being reed to give much attention, rds one example of the real } ed for an international health | ly of executive power. Swe- | | a i . for example, has found it ° essary to organize a mobile typhus hospital, and one is being pre- loser takes the | It ed containing beds for 100 patients. thing but the first to a ing | man who was recently luced STREET VENDER COVERS WARES America as swimming inst r on tl WITH ISINGLASS SHIELD pen inet lmperater. § tiie many % quaintances call him the Most persons know how many dust _ pion one-legged swimmer and ul cles and disease germs the street with good cause. He h vender ordinarily several remarkable endurance includes with his high dives. One of the latter sale of candy, fruit, recently from a special platform erected or ice-cream cone on an amusement pier near Liverpool and consequently England. refrain from buy- erenteeest ing. One vender re- RUSSIAN SPIES CARRY PHOTO cently realized that > “VT tits supeenne of bis MESSAGES IN EYES wares to the blow- Spies, engaged in a life-and-death bu ing dust of the ness, have devised extraordinarily ingeni- street was curtail- ous methods of concealment since h ing his trade; so he’ tory began. No means could be mort invented. an d is markable. how ~~. ai # than that us d by tl now using, an isin- Russian bolsheviki for getting me elass shield for his through the enemy lines. The inside sl} basket-trav. As he of an eggshell is pasted on g! patrols his favorite duced with a microtome knife to “beat” in front of impalpable thinness. It is then a metropolitan the- and a microscopic message phot ater, passers-by can upon it. Removed from the gl t see his confections spread with a brush on the spy’ as before, but are now more strongly under the lid. It does not inconveni tempted to buy by their obvious cleanli- the carrier, and being quite ti 17 m4 coal ness. t is practically im

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sid POPULAR MECHANICS ees TEAM AND SLEDGE USED FOR SUMMER TRAVEL IN NORTH RUSSIA B iigetnid primitive carriage caught the eye of an American tray ster in the Pechora district of north Russia mer, and the above photograph is the result. It is explained that the Russian priest was unal procure a wheeled conveyar leys between di stant parishes, so was forced to make use of sledge On snc overed gro re yuld easily be drawn by a single reindeer; traction over immer moss, he er, requir The daisies in the foreground offer odd contrast to the dr winter boots and "great fur cap GOLD-MINE SHAFT SUNK THROUGH GARAGE —— \lItho vl, m l i garage ha proved a i large unders eround ¢ rasolit ne tank i eold mine for its owner, it remained for and the garage busine ss genet th 1. val eman of ¢ ¢ \ I] Calit to forgotten thereafter, while a windlas ee —— 7 installed, and the |! deepened, In a | time the amateur mu descended ov it remoy\ ed several vold-bearing quart Treated at a local st mill, this brought $137 ton. However | encou The Street Front of the Gold- Mine Garage is Pictured Above The Vein beneath It is Now being Worked from a Gold Mine Near By sink a shaft through the floor of his’ establish- ment, and to bring to the surface the virgin stuff. The metal revealed its presence, quite unex- pected, while excava- This Dhategrenh was Taken Shortly After the Windlass was Erected. The "a di ay echanics-Miners Sank Their Shaft 60 Feet, and Brought to the tion was 1n progress tor Surface Several Tons of Gold-Bearing Quartz

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( POPULAR the shait, and the accumulating dirt on garage floor threatened to crowd out last itomobile, the garageman sold rights to a mining company, which works the “Garage Ledge” from a -by mine. IGNITED METAL DUST BULGES WALLS OF FACTORY The accidental ignition of aluminum t is blamed for the explosion that bulged the sides of an aluminum factory in Manitowoc, Wis., and followed by a fire that lengthened ready long casualty li Subse ent investigation showed that a wire become entangled in the. suction er employed to carry off the dust. — | : +] 4 Ch ' the fan, the wire no doubt | rks that ignited thre du t in pes. lhe force of the resulting exX- may be imagined from the fact e Walls of the Room Dust che DU \T. the hea steel window frames were the brick walls forced out- wo to five inches. VV } and TCH GIVE PORTABLE TOWN TO STRICKEN FRENCH lany an American tourist will be sur- prised this summer to find just outside he War-torn city of Lens, France, a uaint Dutch village. The stranger will earn that the village is a gift from the people of Holland to the returning citizens Lens. ‘The houses, all of wood and f an ingenious, knockdown construction, re now awaiting shipment from the a N¢ the rlands, nd in comfort 500 refugees. ? ve at llings a where the parts were sawed \ssembled, they will shelter When all the fitted, es are occupied, the Dutch govern- will send landscape gardeners to out flower beds and = shrubbery in mony ith the buildings in Which the Aluminum Exploded were Bulged Outward Two to Five s. The Resulting Fissures can be Seen near the Coping MECHANICS 8; RADIATOR AND ENGINE WARMED BY ELECTRIC HEATER Hung Radiator from the Right, the Electric Cap as |} tured at Heater at the Heat through the Radiator to the Er ‘ | LA Lit ( ( re ¢ i ‘ Irpos eate oO mM consisting ol} teel hack. paraboli liectol ) ished COPPEel da Wn TX ance elem t air len { P sun ihout 17 itt n | I - +] 1 4 Irom he radiator cap py e ae | ‘ “ vided, Bane onnected to ‘ re ‘ ] ‘ } ‘ } . 4 tric-light sock« he heate Ta ut stream of hot air through re rad and to the engi HOLDER FOR TWIST DRILLS IS HANDY GAUGE ALSO By combining in one trument the fa miliar V-gauge for twist drills, and th customary holder consisting of a plate with numbered holes, a Venn n manufacturer has evolved a new worl shop tool of great value. The \ r¢ marked in decimal = graduation ru ilong the front of the plate, d there a two rows of numbered hole the | rom each hole a linn ] it cribed to The Holes Hold the Drills, the Tapered Slot Is the Gauge corresponding position on th . this means the right hol the right drill for a is instantly found l lows the indicating line . wt £880

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POPULAR MECHANICS thle VY BH Al a: » ™ oe. Pm, ~ Arizona Floods Undermine Big Cement Bridge: Despite Its Massive Solidity, the Structure across the Sa River at Lempe had to be Closed to Traffic This Spring When the Flood Water Weakened Its Second Pier and Threatened the Bridge with Destruction

FLYING-REPTILE SKELETONS ARIZONA FLOODS UNDERMINE FOUND, LARGE AND SMALL BIG CEMENT BRIDGE Recent discovery, in western Kat fhough the whole of Arizona chalk beds. of tl ll mplete skeletor I erally reg irded as a re gion of little n a pteranodor r flying reptile, measuring ure, some of its rivers have had alm possibly 21 ft. across the wing tips if the) more than their share of flood water were extended, h revived discu n spring. Two severe floods in successio ot other tv] t these extinct creature in the Salt River did considerable da Contrary to popular belief, they were age in the vicinity of Phoenix, and all of large » found lempe, up the river a few miles, mad ago in Bavart ! nl he , necessary to close a big cement high robin, and has teeth like needles, wh ; bridge to all traffic. Despite the mas the American skeleton y t less. The solidity of this structure, built betw large specimen is now in the American 1910 and 1913 and regarded as the st Museum tf Natural Hi r t ee ereatest bridge, one of its piers undermined by the water that the eng neers were on the point of dynamit when the tlood subsided. BUILD COFFERDAM IN INDIA WITH OLD TRACK RAILS Engineers in strange lands frequ have to depend upon their ingenuit construction methods which, in better supplied would offer no pl at all. In building a new bridge 1 recently, the cofferdam for the abi foundation was made principally oi railroad rails of the 20-ft., 75-lb. s Two of these were bound together hea to head to make each pile, and the pil / ae driven 6 ft. apart. As the walls wer Fossil Skeleton ofa Flying [& _." “47 tt. apart, transverse rails served also ty Reptile with Teeth, Found it, a? : braces. The wall was built up of 9 ” a otc tA ae te < ae 12-in. planks of mango wood, 6 ft. lon - slipped into the rail grooves, and bag ; clay were used to calk the bottom York: the small one in the national mu- the masonry wall was built inside seum .of Munich. dam, the planks and rails were reco NATURA

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HARVESTING THE GIANT PACIFIC CRAB By LAWRENCE WILLIAM PEDROSE AS a substitute for the high-priced lob- ster, perhaps no after-theater dinner t is as popular as the so-called Dunge- crab, the lowly crustacean which jarvested by fishermen along the north fic coast, but although millions of ericans are familiar with the juicy, del- te white meat of this product of the very few know of the hazards inci- o its capture, or of the methods by it is prepared to make it pal- Dungeness crabs come from lace on Puget Sound—the vicinity of ty trom which they take their but that area not productive to supply more than a small per- of the demand. Willapa Harbor, coast of Washington State, pro- he main supply of Dungeness crabs reaching the market, ‘and the shal- long the coast of southern Alaska clared to contain teeming millions se crustaceans and constitute an in- is its spe- nd when rwn, has the size small din- itter and from 3 It lives iter from 2 foraging down The Crabs, Which Decay Easily, must be Boiled and Refrigerated before Shipment. ere, a Crate Contain- ing Approximately 200 Crabs is being Taken from the Boiling Vat after Five Minutes’ Cooking the shallows with the changing tide in search of clams and other shellfish. Fishermen with Their Boat Filled with the Giant Crabs: Sometimes These Boats are Pounded to Pieces on the Shores On the open coast, the crab fisherman faces many perils, fo1 in these region the crustaceans are caught at the ocean’ break — that point where the shelf of land which forms the shal- low water sud rac nly drops like the face of a precipice t unknown depths. Fishing is done trom small boats of the open type, 25 ft. in length. Round hoops, varying in size from 3 6 ft.. over which is loosely strung an ordinarv mesh fishnet, are used for traps Bait of clams, or other meat, is tied to t! meshes of the trap, and the contrivance lowered to the bottom. The crab crawls onto the trap to reach the bait, and others quickly follow. Then the fisherman pulls the string which raises the trap and The Crabs Brought In by the Fishermen are Cleaned by Scrubbing Off the Slime and Fungus before Placing Them in the Boiling Vat offshor« averaging LO

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POPULAR crabs are helpless to escape, as their legs and claws sink through the meshes. As the meat of crabs decays quickly, they cooked as soon as they are ashore, aiter which they will eep for several days. The cooking is a simple process. Some 200 to 300 ire dumped into a crate, which is lowered into a tank of hey present a mixture of red, are brought 1 crabs then water. ereen, and boiling PORTABLE FORCE PUMP FILLS STEAMSHIP OIL TANKS Lubricating oil is placed aboard steam- hips at a Pacific-coast seaport by means f a portable pump, capable of transferring the fluid into a vessel's tanks, rorce MECHANICS vellow tints when put°in the hot wat In five minutes they are removed fro the vat, thoroughly cooked and a war: red in color. Unlike the lobster, they a: shipped boiled and ready to eat, but th: same method of preparing them for tran portation—refrigeration—is utilized. wh the market is more than a day’s distance away from the point at which they ar packed for shipment. BIG IMPROVEMENTS PLANNED FOR BIGGEST BOROUGH Four notable and interesting improve ments are planned for the Borough Brooklyn, New York City, according the recent announcement of the boroug To house th offices, no widely scattered, the ad ministration proposes build a great centr building back of th present Borough Hal [It hopes, too, to com plete by the summer ot! 1921 a boardwalk, the greatest in the world along Coney Island’ five-mile beach front Third comes the plan for the widening and beaut fying of a central boul vard as a memorial to the 105,000 Brooklyn m« in the American force: during the World \ On the many triangul open spaces formed intersections with di onal streets will be plac« imposing monuments to local heroes. Finally, of really na tional importance, is th announcement of the ad president. municipal The Close-Up View of the Portable Force Pump, at the Top, Shows How the Wheels of the Truck Hold the Base of the Pump. Hose Which Connects the Truck Tank with the Tanks of the Vessel at the Right from the truck used for hauling the ma- terial to the docks, at the rate of 500 gal. an hour. Four men are required to oper- ate the device, which is mounted on a wooden base, and equipped with a 100- ft. hose. When in use, the contrivance is installed back of the truck, and held in position by the rear wheels of the latter, which rest on two planks attached to the base. A steel frame underneath the vehicle serves to carry the apparatus. ministration’s determina tion to push through th development of the Ja maica Bay water front This splendid harbor, at Brooklyn’s bac} door, the borough is to make accessibl for ocean traffic by the excavation ot deep channel around the shore line. Ship will dock at public piers, six of whic! are already assured by a recent appropria tion of $7 500,000. These six. will be but a beginning, however, as even now a hall of New York City’s great and constantly growing foreign commerce passes in and out of Brooklyn. Below is Seen the

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POPULAR MECHANICS

— ee ” a ats” « <# Pi, par “ 7 Auto with Plow Attached, Showing the Construction of the Large Center Blade and the Smaller Wheel Blades, Which are Independently Adjusted for Depth by Handwheels on Their Frame AUTO CLEARS ITS OWN ROAD WITH SNOWPLOW ATTACHED \ snowplow attachment for the front tan automobile, that not only clears the id ahead but throws an ordinary fall snow clear over into the ditches, has cen devised by a New York inventor. he device is a development of the one scribed in this magazine in February, 17, which only removed the snow from vo narrow paths in front of the auto vheels. The new model adds to the two mall plows of the older one a_ broad \'-shaped blade, set between and over- lapping them. All three blades are inde- pendently adjustable for height, the center one being raised and lowered by hand- wheels and screws. The increasing de- mand for open highways in winter adds interest to the invention. € A 2,500-acre aviary will soon be found just outside the northern limits of Chi- cago. As part of the county's forest pre- serve these acres of marsh land will be thickly sown with rice, and will be pro- vided with all kinds of bird shelters. The Manner in Which the Snowplow Attachment for Automobiles may be Used to Clear a Highway is Seen in the Left-Hand Picture, Above. At the Right Is a Close View of Its Action on the Snow SLATE AND NUMBERED HOOKS BASIS OF LAUNDRY SYSTEM Confusion and the loss of customers’ property have been very nearly done away with in one city laundry since the manager devised and installed a new receiving sys- tem. In the receiving room he had erect- ed numerous wire partitions. At one- foot intervals along the partitions were placed vertical rows of hooks, each hook numbered, and a slate at the top of each row. When a bundle of laundry is re- ceived, the customer's initials are chalked on a slate, and the pieces hung on sep- arate hooks beneath it. A glance at the number of the last filled hook showing the number of pieces received, this total is chalked on the slate beside the initials. A large hook at the bottom holds the b ig. The Girl at the Left is Hanging the Contents of a Bundle on the Hooks beneath the Slate Bearing the Customer's Initials. The Bags are Hung on Large Hooks at the Bottom, as Shown at the Right

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POPULAR MECHANICS TOWN PLAYS FREE-FOR-ALL FOOTBALL IN RIVER Ab ~ Secnad Ge Play- ee ? ’ ‘ Pom, i % oo hag Ecos * ing Field for the Com- a. ff ‘ - ' Participate in the Strang¢ manity’s Traditional f " . oe Contest Football Game : \ncestor of the Bem? : in one instance highly specialized : a ™ least, by the tow American game is ‘ ; : of Ashbourne, the lawless “foot- joj. . central England. ball” that once was ® , ; .. obedience to played in the ee 7 A “=. + plicable custom streets and open 2s" <a . gon” meee shallow river spaces of English —=—- : te ; made the _ playi towns and villages. ae = — B field. While s )n Shrove Tues- . : aoe tators crowd eid boy : day, in particular, ™ : —_ =Ss—_— banks and the hardi r tOWNS- Here the “Upstream” Side has Forced the Ball Close men and folk of both sexes. to the “Downstream” Goal. The Goal Is the Arch of the “upstream were accustome d — ae phe an d t h e to join the mélée, ‘ stream side” stt while anxious shopkeepers put up shut- gled back and forth in the attempt ters and bolted doors. “Football day” as force the ball through the oppo a custom has now vanished, for the most defense. Arches of two of the part. This year it was revived, however, bridges formed the goals do nent - bel MIGRATION TO PALESTINE TO BE yance of a great army. General hi SYSTEMATIC quarters will be established at Lond Copenhagen, and New York; district bu The world-wide migration of Jews to reaus will be formed in every important Palestine, scheduled to begin when, if Jewish center. Receiving stations at ever, Great Britain assumes the mandate, Jaffa, and other ports of entry, will is to he directed scientifically, like the ad- equipped with barrack, hospital, and qu i

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POPULAR MECHANICS antine facilities. And it will be according to advices received from these stations in Palestine that the offices in London, Co- penhagen, and New York will order the organization and departure of groups of pecified size and composition. Thus su- pervised, the growth of Palestine’s popula- tion will be symmetrical—labor will always e adequate, and no more; the professions will not be overcrowded, and so on. This careful selection of the emigrants will be made possible by the use at the district bureaus of card systems, one information card being filed for every prospective emigrant. MACHINE SPLITS ROCK-DRILL CORES FOR MINERALOGIST Che little cores brought to the surface the hollow, cylindrical bits used in th boring and rock drilling are valued —_—— - by the mineralo- gist because they describe for him the strata from which they are taken. To deter- mine their compo- sition these cores are usually com- pletely pulverized. But a core splitter has now been in- vented which di- vides these little rock cylinders into two lengthwise portions. One of these is pulverized as before; the other is preserved as a sample of the rock struc- ire. The core splitter has a stationary and movable knife blade. With the core held upon the stationary blade, the movable blade is lowered upon it by means of a hand lever. A hammer blow then splits core. BRICK BUILDING IS PEDESTAL FOR OLD FRAME RESIDENCE A two-story frame dwelling on a street corner in Portland Ore., was too valua- ble to wreck andtooold to find a buyer. So when the owners decided to improves the corner by the erection of a one-story business building, they resolved that the house should remain. The house was not touched until the brick walls of the new building had risen on all sides of it. Then it was loosened from its foundations, and reised by jacks and pulleys until above the brick walls. The interior framing and level roof structure were then put in place, and the house was lowered upon them. The Rafters and Interior Framing of the Brick Build- ing have been Put in Place, and the Old Dwell- ing has Just been Lowered upon Them The lower building is built strongly throughout, that it may support the two additional stories of brick that eventually will replace the frame house. NEW VERSATILE POWER TOOL HAS MANY REFINEMENTS A number of unusual features char- acterize a new electric power tool, meant for use as a wrench, drill, and screwdriver. mechanism, in the matically shuts the screw or nut A clutchlike first place, auto- off power when is seated, or when the limit of In this way injury to torque is reached. The Power Tool is Controlled by Means of the Switch Knob, at the Right screws, nuts, bolts, and the tool itself is prevented, The tool can be quickly regulated so as to fix the exact force to be exerted. Sur- prising power is developed at the chuck, too, as the power from the high-speed motor is increased 64 times by worms and gears. The efficient equiva- lent of two to five horsepower, in fact, is secured from this little portable too] by thus gearing it down. steel

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QRY LARGEST SAWS IN THE WORLD MADE FOR WESTERN MILL An eastern tool company, filling a spe- cial order from a Pacific-coast lumber mill, recently manufactured the largest These Immense Circular Saws, Said to Be the Largest Ever Made, will be Used in a Western-Coast Lumber Mill circular saws in the world. Each saw is 108 in. in diameter, weighs approximately 795 1b., and includes 190 teeth. he lat- ter are inserted in the rim, and can be re- placed if broken. ‘Two steel ingots, each 1,140 lb., were the raw material from which the great disks were made. The will be used for cutting big logs into lengths suitable for the produc- tion of shingles. weighing SaWs GREATEST STAMP COLLECTION TO BE AUCTIONED BY FRENCH The postage-stamp collection of the late Baron Ferrary, confiscated during the war, alien property, will soon be sold at auction by the French government. Housed for many years in Paris, this, the world’s greatest, collection was accumu- lated at an expense of $2,000,000, and over a span of 60 vears. It includes copies of stamp issued. each worth $10,000, or more. practically every postage Several are : POPULAR MECHANICS BROOKLYN PLANS _1,000-FOOT TOWER AS WAR MEMORIAL The dominating structure in New York City’s skyline as seen from the sea, ji present plans of the Brooklyn park com missioner are carried out, will bx a 1,000-ft. tower in Prospect Park. [f constructed, this borough wat memorial will be the largest structure of its kind in America It will be approached by a seri of esplanades, ascending to th summit of Lookout Hill. Here, beyond the Court of Honor, cor taining heroic statuary, will stan the tower. Its three-storied bas will contain a central hall 100 ft. square, flanked by two theater: each seating 2,500. Above th arched roof of the hall will be library, office rooms, and an ol servation chamber. Behind the towe1 base, on a natural slope of the hillside, will be found an amphitheater with seats for 15,000 people. 1 AERIAL MAIL PLANES FITTED WITH SKIS FOR WINTER USE The substitution of skids for landing wheels on America’s postal airplanes sey eral times prevented the interruption of the aerial mail service by the snowstorm of last winter. The skids were first used in flight from Newark, N. J., to Washing- ton, D. C. As applied to the DeHaviland planes, the skids take the form of large skis, about a foot wide and five feet long They are mounted on the axles of the landing gear, and so may easily be sub stituted for the wheels. They ace guyed in place by short lengths of rubber cord with slack guys of steel cable safety in case of breakage. The carriage otherwise remains assuring under- unchanged The Wheelless Landing Gear is Seen, at the Left, beneath the First De Haviland Mail Plane to be So Equipped. The Equipment is Shown in Detail at the Right. The Skis are Easily Slipped off the Axle

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POPULAR MECHANICS Self-Closing Drainage Gate Complete, Showing the Method of Pivoting the Iron Disk Where Automatic Gates are Installed at Both Ends of a Pipe, a Chain and Lever are Provided So the Gate in Use may be Opened by Hand At the Left, Gate on a Pipe under a Railroad Embankment, Closed Because the Land on the Other Side has been Drained; at the Right, the Same Gate Responding to Pressure from Flooded Land SELF-CLOSING DRAINAGE GATE CONTROLLED BY WATER Slight water-level variations operate a new automatic drainage gate, which is lesigned especially for preventing back flow in tile systems, in cases where the latter drain in rivers or canals that are ibject to flooding. The gate also can he employed for the same purpose at the mouths of small ditches. A cast-iron disk is hinged at the top of a ring of the same material in such a manner that it can be swung in only one direction. This as- sembly, which forms a simple valve, is at- tached to the end of a corrugated pipe, suitable for the outlet of a tile drain. As long as the water inside the pipe is at a higher level than the surrounding water, the gate remains open, but if the condi- tions are reversed, the pressure of the water on the outside immediately pushes the disk against the ring, checking the flow of water into the pipe. According to the manufacturers, a difference of a few hundredths of an inch between the water levels will cause the gate to function. The rings fit pipe from 8 to &4 in. in diameter. ELECTRIC HEATER FOR KNIVES USED IN INDUSTRIES Electric heating in the industrial field is gradually being extended even to minor operations. A specialized heater, recently developed, is used for heating the blades of knives employed in the leather and similar industries. The blades are in- serted between the heating element and its asbestos top, which can be adjusted to The Knife Blades to be Heated are Inserted between the Electric Heating Element and Its Asbestos Top, Which can be Adjusted to Take Any Flat Tool take any flat tool. The little stove, mount- ed on a slate base, is made in several sizes, one useful model taking but 75 watts, or about the same as a lamp.

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POPULAR MECHANICS BRONZE STATUE HONORS DIXIE’S COTTON PEST “Tn Profound \ppreciation of the Boll Weevil,” arch-pest of American cotton, the people of Enterprise, Ala., and vicin- ity have adorned their public square with a tall bronze statue. Superficially the action savors of lunacy; investigation of local history, however, reveals it as a manifestation community consciousness, Tor many years, it Enterprise belied its name—dragged in fact, as the center of a s] iftless, debt- ridden farming Cotton had SO long been the only crop that local farmers commonly settled last year’: 7 ie splendid ot seems, along, section. debts with next year’s income, Then, Vv several ars an impending weevil. Confronted by of total ruin, men rallied, at V¢ came ago, invasion Warning Ol of the boll the possibility and business to a mass meeting in Enterprise. They decided to break completely with the past. Each cotton farmer promised to keep hogs and peanuts, beans, general to farmers ] last, raise and in cattle, t and’ corn, make his farm largely self-sufficient The invasion never materialized: but the promises have been kept, the complete rejuvena- tion of Enterprise has resulted, and credit, wit the statue, to the boll weevil UNUSUAL METHOD SAVES EYESIGHT 1 0 ness FOES The blowing out oO safety diaphragm oO hydrogen tank with fective valve, tained gas pressure, r numerou de- con > 8 vnicn ' ol met met 1 This Tall Bronze Statue was Placed in as ] the Public Square of a Southern Town n “Profound Appreciation of the Boll eevil’’ bedded in the right sourceful mechanical en- gineer. The metal was not analyzed but was known to be a low-melting alloy such as would be used for a safety diaphragm of a tank containing combustible gas, in order to prevent the possibility of an ex- plosion; it was thought to consist of bis- muth, tin, and lead. A few of the pieces of metal were large enough to be picked out but it was estimated that after their removal some 40 or 50 smaller particles remained. The doctor believed that to remove them mechanically would require eve of so much digging around as to destr the sight. He tried treatments to softe: the cornea with the thought that the pa: ticles might drop out by gravity but th tailed to do so. In the meantime the ritation was not only putting the injur eye in worse and worse condition, bi the left eye was beginning to cause tro ble of a sympathetic sort, so that at th end of three weeks after the accident! had occurred the victim was feel ing very uncomfortable, to say th least. i Then he decided to take things int his own hands. He conceived the idk of removing the metal by amalgamatio1 that is, of taking advantage of the fa that mercury will readily alloy wit! and take up many metals, This sam property of mercury is applied in the amalgamation process of extracting gold from He purified mercury by treating it in the usual way with dilute nitric acid and redis- tilling, and applied it to his eye by \ means of an eyecup. Almost im- mediately the irritation to the evelid, caused by fine projecting points of metal, was relieved these points disappearing like magic. By repeating the applica- tions, using fresh mercury each time, every metal was removed, and two weeks the « was normal condition. ore, SOTH¢ piece ot inside of yi restored to ALLIGATOR PEAR CONTAINS MUCH VALUABLE FAT \mong the fruits use for food. the all pear, or avocado, markable proportion Tuns as high nt, or about thx um that cream, + iga is its larg fat ’ for W 20 al pet ce all of commot! It has bee I found that the hum system assimilates th up tO as great a quant This unusual qualit gives the fruit a high value in dietetic and adds interest to the efforts being made to bring it into more common use. Though still a curiosity to many person its cultivation in California and Florida is increasing, and the growing apprecia- tion of its value doubtless will ultimately take it out of the class of rare fruits, and make it available to all at reasonable prices. at very readily, is 114 oZ. a day.

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POPULAR MECHANICS >» i FRENCH AIRMAN PHOTOGRAPHS RECOVERED BORDER FORT ETURNED to the French after almost 50 years of German possession, the Alsatian fort Neubreisach was recently photographed from an airplane for the records of the new owners. The photograph, probably e first of its kind to be made public, shows with the definition of a blueprint the outlines of the iefense works which since 1700 have made the little town one of the strongest forts along the Franco-German order. The stronghold shows its antiquity in its formal, octagonal trace, with bastions, ymmetrically disposed. To the left is seen the Rhine-Rhone canal. intricate ditches, etc., all CONVERTED AUTO MAKES SPEED ners, finally, are bolte d to the sick ~ of OVER ALASKAN SNOW the frame. Thus ad ipted to cold-weath use, the car makes 10 to 15 miles an hour \ pair of broad tractor wheels, a heavy It keeps well on the surface, too, in all »’boggan, and a popular low-priced auto- but the softest snow. mobile, have proved to e a combination that vill make motoring an l-year-round possibility ind near Nome, Alas- i. The first step in the onversion of the car to ts winter form is the dis- mounting of the four heels. For the driving vheels are substituted the broad tractor heels; then the front vheels are replaced by the toboggan, which is (i linked to the steering agg ae a ae — umn. Auxiliary run- The Deeg Winter Snow about Nome: Alaska, Is Not an Obstacte, but a

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POPULAR MECHANICS FOUNDATION OF OLD SMELTER MAY BE GERMAN GUN BASE Residents of Argentine, Kan., are quite exercised over the discovery that the FIVE MILES OF BROKEN GLASS PAID FOR BY ONE COMPANY A pane of heavy glass, 10 ft. high a almost five miles long, would represe: the sum spent last y« by one glass-insuran company, according its annual report, for r placing broken sho cases, windows, etc. 10,679 of these los were paid during 191] the long pane may bx agined as shattered missiles and other causc at least 2,500 times to tl mile. Each fracture ec the company, on the erage, $35, or a littl more. These figures Smelter Foundation Laid Years Ago by German Workmen in a Kansas Town, and Now being Wrecked: It Resembles a Gun Base foundations of a smelting plant, laid years and now being wrecked, bear a startling resemblance to big gun em- placements. The smelters were built by German engineers, and the concrete bases, 20 ft. thick and of extraordinary hardness, recall those of similar form found in England and France. Ordnance placed upon them would command an entire manufacturing and railroad district, and be protected from counterattack. ago NEW ELECTRIC NAVAL VESSELS HIGH-POWERED AND SPEEDY Electrical-propelling machinery is being built in two eastern plants for the U.S Navy’s new 44,000-ton battle cruisers and 43,000-ton battle- ships. Each of the cruisers, rated at 34 miles an hour, will be equipped with four steam turbines totaling 180,000 hp., driving three-phase generators, of kilovolt-amperes and 5,000 at 1835 r. p. m. The four peller shafts have two induction motors each. As 22-pole ma- chines, they will run at 331 r. p.m. and deliver 23,000 hp. For half speed they will operate as 44-pole motors, yielding 6,800 hp. at 170 r.p.m. The battleships are to have two turbine generators, and four LO O00 volts, pro- I 3 only approximations, yet they bring home th reality of the risk run every owner of plate glass, and especiall by the proprietor of the large store, wit its many cases and display windows. MOTOR-DRIVEN AIRPLANE TOY ADVERTISES SERVICE STATION I'lying around the mast of the weather vane, a large airplane model wins the t1 stant attention of | through a small town in Nevada. toy thus serves its purpose, as the surmounts an automobile service st ‘| he zontal arm which is free to turn about t! mast. Down this arm run wires wh! supply electric current to the motor, a motorists passit four propeller shafts with one motor apiece, operable either with 16 or 24 poles. With a total of 60,000 hp., the propellers running at 225 r.p.m., they will make 23 miles an hour. Flying around the Mast above This Service Station, the Little Air- plane Serves as an Eye-Catching Advertisement thus turn the propeller. plane is illuminated. At night th

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Vladivostok General Offices, Used in the Work of Preparing American Motion-Picture Films for Russian onsumption by Translating the Titles: All of the Equipment and Apparatus was Made on the Spot of Odd Materiai SIBERIAN FILM FACTORY EVOLVED FROM JUNK By PHIL NORTON build a U NDERTAKING to motion-picture laboratory ina strange d empty land, without machines, chemi- ls, or experts, demands the genius of a Kobinson Crusoe plus the impatience of modern an American business man. t A Yet a com- e plant so built is operating now in divostok, Siberia, and is doing a great il to acquaint the Russians with the orks, purposes, and general character of unknown America. \Vhen films are to be shown to an alien the first and most vital requisite ( is the translation of all titles, subtitles, and “leaders.” These are parts of the film, and the process of making them is just as technical as finishing the pictures themselves. Every inscription, therefore, had to be lettered in Russian on a big card, a strip of pictures taken of it with a regular motion-picture camera, the neg- ative developed, and positive prints made to cement into the film. The Americans in charge of the work. unwilling to await the slow process of translation at home, set out upon the dif- At the Left Is a Printing Machine Made from Junked Parts of Projectors and Other Machines. At the Right Is a Complete Electric-Light Printing Outfit Made the Same Way, and Now Doing Practical Work 887

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POPULAR MECHANIC The Translating Office, in Which the American Film Titles are Rendered into Russian and Neatly Lettered onto Large Cards: The Cards are Then Photographed on Motion-Picture Film and Inserted in the Pictures ficult task of equipping a plant without eras, printers, and projectors. In a r visible materials. A former thread fac- markably brief time the extemporiz: tory was preempted for headquarters,and plant actually was turning out a consid = oe 2 aes erable volume of films titled in the nativ tongue and ready for the edification of the Vladi- vostokians and their neighbors. Phe pictur are loaned free to public organizations and rented for a nominal fee to pri vate institutions, and a result, knowledge oO \merica’s industri utilities, and general ac tivities is being rapidly propagated. U. S. BUILDS WOODEN TOWN FOR ENGLAND — = _ EE = On the grounds of a The Projeciion Room, Where Each Picture is Viewed before Distribution: disused airdrome in a All the Furniture in the Room, Including the Big Floor Lamp, was London suburb are soon Made by Chinese and Russian Carpenters Out of Odd Materials : . : to be erected. 1,000 furnished with homemade tables, benches, knockdown wooden houses from. the chairs, and lamps. Chemicals were ob- United States. Already 300 are on their tained from Japan, and barrels converted way. The airdrome has been laid out for into tanks. Fragments of discarded ma-_ their coming as a real garden city. Each chines, rescued from Russian shops, were lot is spacious, streets are wide and curv- ingeniously worked into practical cam- ing, and a small park is left in the center.

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POPULAR MECHANICS MANGLE CUTS PAY ROLL OF STOCKING MILL lroning, the last process to which the ,lucts of a stocking mill are subjected, formerly done in ie great factory by ny girls, who stood up , old-fashioned ironing irds. The girls have been replaced, how- r, by a broad mangle, rotary press, which ers ironed stockings 1 continuous stream, four operatiy es are led to tend the ma- Two of them lay stockings on the id canvas belt, which the hose between | rollers. The other operatives then pick these off the belt and lay them on a table, ready for boxing. Unironed Stockings are Laid on the Broad Canvas Belt of the Mangie, Which Then Conveys Them between Heated Rollers BOAT’S MAIN ENGINE DRIVES DECK WINCH A deck winch driven by the propelling engine attracted the attention of all who in De cted a seagoing motorboat recently fit- ted out in a Pacific yard service in Alaskan waters. little winch is bolted to the deck just forward of the pilot house. To port, the drum shaft termi- nates in a worm, which engages with a gear. The gear is turned by a chain drive from the engine e Chain Drive from the Engine, Down in the Hold, is Seen to the shaft, down in the hold. A fric- t of the Winch and Just above the Drum Shaft. The Gear tion clutch controls this connec- gages with a Worm on the Shaft. A Friction Clutch Con- . trols This Connection tion, MOVIES GET ALTITUDE EFFECT BY POSING ON TUNNEL EDGE hrough the windows of an in- cene, in a motion pictur: ly taken in the West, there 1 ( impses of a busy street emingly far below. This ap- rance of great altitude gives juite a death-defying quality to he various feats performed. As matter of fact, the scene sets ised were erected at ground level, but on the edge of a high con- crete wall, at one end of a tunnel under a hill. Thus the city’s geographical peculiarity aided the ite ana movie men to obtain an unusual Movie scenery Sot_ Ue oe on RN eB nay a High- effect in a simple way. through the Windows oO ~ 1

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SYO WORLD'S LARGEST AIRPLANE COMPLETED IN GERMANY The largest airplane in the world today, in all probability, is a biplane recently The Engines of the Starboard Nacelle are being Inspected in Preparation for the Trial Flight. The Wheels of the Under- carriage Are Each Nearly Five Feet in Diameter completed at Leipzig by one of Germany's oldest airplane - manufacturing firms. In design, the POPULAR MECHANICS PREPARE TO EXECUTE PLANS FOR ZONING CHICAGO That the city of Chicago will cover 4 square miles, and have a population 7,000,000 by 1970, which must be provid for in any zoning system adopted no and that such a system will save the peo ple of the city $1,000,000,000 in the nex 20 years, are some of the expert predi tions made at a recent plan conference: Che general scheme of the zoning plan to designate certain districts, small large according to local conditions, residence, business, or industrial district and to prevent future encroachments ot one kind of occupation in a district another kind. The work is done by map one recommendation calling for a set ot three, one designating the use of districts another the allowable lot area to be coy ered by buildings, and the third the per- missible height of new buildings. Phe great value, for this use, of maps made by airplane the possibility ot adopting that for plotting Ch cago. Canada, is now having suggests method Toronto, new air monster is dis- appointingly convention- al; but in size it stands unrivaled, outspanning the American NC planes, and the largest British Handley-Pages by almost 30 ft. It is driven, no doubt at rather moderate speed, by four engines, two mounted on either side of the fuse- lage, in nacelles that suggest the power eggs of a Zeppelin. The four two-bladed propellers are of uniform type and size, and measure about 15 ft. from tip to tip. The undercarriage is double, a four- wheel unit being placed under each na- celle. Beneath the nose are two smaller wheels. It may be inferred that the build- ers intend to use their prodigy for freight and passenger service, as passengers to the number of 22, with their baggage, are said to have been carried on the trial trip. The Great Plane is Seen The Silhouette of a Man in the Nearer Nacelle Suggests PHOTOS COPYRIGHT, KADEL & HE Here on Its Return from Its First Fligh the Dimensions of the Machine such a map prepared at a cost of $6,0U! or $100 a square mile, enabling observe: for the first time to visualize the whol city at a glance, including all the deta that make up the zoning problem. FISHING SCHOONER TO CARRY NEXT ARCTIC EXPEDITION In a New England shipyard, work has been begun on the “Bowdoin,” an auxili- ary schooner which in 1921 is to carr} a small expedition to the frozen North The party, numbering only six, will be led by Donald B. McMillan, remembered

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POPULAR MECHANICS Vessel will Carry the McMillan Arctic Expedition along the Unexplored West Coast of Baffin Land. oner wili Depend Largely on Its Sails, Although It Also Carries a 50-Horsepower Crude-Oil Engine eary's lieutenant on the expedition the North Pole, and will as its object the charting of the miles of unexplored coast line along yestern shore of Baffin Land. The Bowdoin” is to be a modification ie Gloucester fishing type, and will be / ft. long. Obviously, it will be for such perilous work. It is being and equipped, however, with un- ‘are. The oak planking will be hed with ironwood to resist the on of the ice, and will be lined with insulating material. Within, the is to be arranged with the comfort as the first consideration. The cozy cabin will be aft; the motor with its 50-hp. crude-oil engine, be amidships. Forward of the motor : the hold, where stores for ears will be carried; and forward of again, the galley and _ forecastle. he vessel will be lighted by electricity. r ached the men ill be SMALL CHICKENS SHIPPED IN CARDBOARD BOXES For shipping small chicks to distant the proprietors of several large vestern chicken farms have adopted a standard container. It bears little re- emblanece to the bulky crate of wire and 1 arKcets, wood that is made of tough, heavy cardboard, and is just a suit in transit, through sides. truckmen and express employes to keep the top side of the box up. once was used. Instead, it little larger than the familiar Air is admitted to the chicks, holes in the top and warnings enable the box. Stenciled oer ce a ll In These Cardboard Cartons Small Chicks are Packed for Shipment. The Cover of the Topmost Box is Lifted to Show the Air Holes

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SUF POPULAR SEWING MACHINE TRAVELS AROUND MATTRESS For sewing the edges of mattresses is made a machine that propels itself around the mattress, and completes top now Propelled and Operated by the Electric Motor at Its Base, This Sewing achine Makes the Circuit of the Mattress in About Five Minutes. It Does the Work Formerly Done in More Time by Four Persons and bottom edges in 10 minutes. Opera- tion is easy. The unsewed mattress is placed on a metal table of the same hori- zontal dimensions, around the sides of which pass a grooved track and rack. The edge of the mattress is then forced into the jaws of the machine. As a switch is turned, an electric motor sets the sewing mechanism in motion, and starts the whole machine on its journey around the table by means of a pinion which meshes with the rack. MECHANICS NEW EXPLANATION OFFERED FOR SINGING SANDS That the fresh-water unmistakabl sands of beaches emit a distinct sound when disturbed the pedestrian’s foot sometimes when met furrowed by the fing has for centuries been matter of common ol! servation. But the ri son for the sonorousn: of these “singing sand has never been definite] determined. Lately, how ever, a hypothesis h been advanced that h reawakened interest and discussion of, ‘phenomenon. It euessed, in brief, th sand grains bathed pet odically by the wate: t lake or ocean acq ' submicroscopic co ng of salts. These co ings create friction whi rubbed together, and produce sound. The ef fect may be likened t that of rosin on the vi lin bow. The pronouncement this hypothetical explanation has direct: attention to a tentative conclusi reached, years two Ameri scientists. They believed that the sit ing sands became coated, not with salt but with thin films of air or gases cot densed upon them by gradual evapor tion after wetting by lake, ocean. or rai These gas films serve as elastic cushiot which vibrate when the sand grains agitated, and so produce sound, varvyit in character with the form of the gran certain ocean += ——— & UN wo ago, by AUTO REACHES THE BOTTOM OF NORTH AMERICA For the first time in the history of mo- toring, an automobile was driven recently to the center of the Mesquite Flat Salt Marsh, on the floor of Death Valley, the lowest point in the United States. The point reached is 280 ft. below sea level, and the lowest in the world with the ex- ception of the region about the Dead Sea in Palestine. To reach its destination the car had to be driven through three miles of salt marsh where the heat of the sun, often reaching 160°, has built up a maze of salt pinnacles resembling the stalagmit a cave. Some of these pinnacles stic! up to a height of three feet. and all as hard as concrete. To drive the cai through these it was necessary to cut path with picks and shovels, a task whic! required eight hours for the trip. Sim larly, as it was necessary for the motorist to camp overnight, the salt pinnacles had to be cut off to make possible the placing of a sleeping cot. The formation of the salt stalagmites is interesting. Death Valley, being the

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POPULAR MECHANICS rst Automobile to Reach the Lowest Point in the United States, in Death Valley, 280 Feet below Sea Level: A Path had to be Hewn through the Hard Salt Pinnacles, Resembling the Stalagmites of a Cave, Which Covered the Ground Ahead of the Car m of the United States and practi- CATTLE-SHIP CARGO SWIMS without rainfall, receives consider- TO SHORE IN BARBADOS seepage water from the surrounding clad mountains. This water has no The harbor of Bridgeton, chief city ns of escape other than by evapora- Barbados, British West Indies, is litth Capillary attraction raises the more than a shallow roadstead, accessibk r to the surface, where it evaporates only to vessels of light draft. Vessels of leaves the salt. Thus, through ages, large size anchor well out from shore, forest of salt points have been built. and usually discharge their car ~ roes Kept from Shore by the Shallow- ness of the Harbor, the Cattle Ship in the Background is Discharging Its Cargo at Barbados, British West Indies. The Animals are Towed Ashore, Two to a Boat, by Natives Sa cae = apes

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1 lighters. however, is a inimals litted from the hold, and rwered the water by the ship's crane. Here their heads are held by ne- groes in small while ropes are made fast to the horns. Two to a boat, the animals are then towed to shore. neans of Unloading a simpler job. cattle boat, The are into boats, TRUCK’S PLUNGE FROM BRIDGE AVERTED BY GIRDER Death seemed certain, for a ing moments, of claiming th, few excit- pilot ofa lisabled motor truck that crashed half NE = A Steel Girder Stopped This Motor Truck on the Verge of a 40-Foot Plunge into the River below the Bridge, and Saved the Driver’s Life vay through the railing of southern city not long and was halted, on the verge of a 40-ft. plunge into the river below the structure, by a steel girder. The driver clung desper- itely to the steering wheel until the ve- hicle came to a stop, then calmly climbed over the machine to safety on the bridge Hoor. A locked steering gear is blamed tor the accident. a bridge in a ago, EXPERIMENTS SEEK TO PROVE FARM WOOD LOT PROFITABLE \s soon as six farm wood lots in New York State can be turned over by their owners to the students of the State School of Forestry, an experimental effort is to be made to prove that timber is a worth- while farm crop. The students are to do the planning and logging, the school will assist in finding a market for the product, and the farmers will do the hauling and pocket the receipts. @An eight-passenger seaplane has been assembled in Sacramento, Calif., and will soon be put into service between San Francisco and Los Angeles. POPULAR MECHANICS PARIS MUSEUM OF COSTUMES SHOWS CLOTHING HISTORY Since Paris is given credit for originat ing the fashions of feminine apparel, at least, it is a most fitting location for a museum of costumes. Such an institution has just been established there, organized not by shopkeepers, but by a group of artists, writers, and students who hay: worked on the plan for some year Specimens of masculine and feminine co tume so far exhibited, on well-made wax figures, date back in one instance to 1570, represented by a pink and gown. Except for a which might class as a uniform, the dis play is confined to civil dress. The elaborate details of earlier garb are ke pt in glass cases. It is curiously apparent white satin knight in armor, from the evidence shown that the men of fashion once were more gorgeously arrayed and embroidered than _ th women: but contemporaneous works of the modiste and tailor are being intro duced to show posterity that such is now the case. not RAILROAD-GRADE INDICATOR ATTACHES TO CAR WINDOW A portable measuring instrument for accurately railroad grades at all points of the line has recently been devised by an eastern engineer. A carpenter's 2-ft. level is centrally pivoted at the top of a wood frame, and from its center a 10-in. arm projects downward and actuates a mul- tiplying lever with an indicating needle at its upper end. The frame is clamped to a car window sill and quickly adjusted to zero, and the needle then moved by When the Pointer is Moved Until the Spirit-Level Bubble is Centered, the Scale Indicates the Grade hand to keep the bubble centered as the grades change. The grade is then read directly from the scale.

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POPULAR MECHANICS 895 -— a ee +. Automatic Wagon Loader: The Propellerlike Blades Seen in the Left-Hand Picture Clear the Material Away from the Waeels, and the Machine Advances into the Pile, as at the Right USE AUTOMATIC WAGON LOADER FOR DIFFICULT MATERIAL bricks, rock débris, and large- coal are among the difficult materials Broke ni dled by a novel wagon loader which recently come into successful use. he conveyor part of the machine, with endless chain and tooth-edged buckets, similar to the usual form. Its pecu- rity lies in its equipment of heavy re- ing blades, like those of a propeller, hich continually move the material away from the path of the wheels, and into the rising buckets. The whole machine auto- matically advances into the pile, along the cleared paths, at the rate of 30 in. a The loader is propelled and operated by either electric motor or gaso- line engine of 10 hp., and loads 1 to 14 cu. yd. of material a minute without any shovel assistance whatever. The discharge out may be shifted to either side when is time to change receiving wagons. minute. OLD TIN CANS USED TO BUILD HOUSES IN MONTENEGRO Discarded tin gasoline containers and old tomato cans, left by Red Cross work- ers in Montenegro, are being used by some of the natives as building material for their houses. The fireproof quality ot the walls so constructed, though inci- dental, has its value, for the houses have no chimneys, and the family fire occupies the center of the floor, the smoke escap- ing as best it can. Occasionally a single tiny window is built into the tin wall, hut as a rule there are no openings but the door. Meat is often smoked by sim- ply hanging it on the wall. PROPOSES FINGER-SIGNAL SYSTEM FOR AUTOISTS There are only a few reasons why strange autoists should want to commun1- cate with each other, but those tew are sometimes urgent. Therefore it has been suggested that all drivers learn a_ tew simple finger signals. For example, one finger raised, with-the back of the hand toward the other car might mean “Your tire is flat.” Two fingers would signify something else wrong with the other car, and call for an inspection lhree fingers would ask, “Am I on the right road?” Four fingers would warn of dan- ger ahead. The whole hand, palm out- ward, would be an “S. O. S.” call for help, requesting the other driver to stop. These simple signs are readily memorized. Suggested Signals for Autoists: One Finger Raised, “Your Tire Is Flat!” Two Fin- gers, “Inspect Your Car!” Three Fingers, ““Am Ion the Right Road?”’ Four Fingers, “Danger Ahead!” The hole Hand, Palm Out, a Call for Help

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896 POPULAR MECHANICS OLD BRICKS PULVERIZED FOR ROAD MAKING A Great Pile of Brick Dust to be Used for Making Pavements The brick - dust industry 1s gaining ground. Contrac- tors have found that worthless bricks, taken from wrecked buildings, old foundations, etc., can be used for highway and until pulverized t sidewalk construc- the required siz tion, just as thev bw Boulevard, Above, is Surfaced with Brick bate The dust is th-« ie om ce iced btained by Pulverizing Bricks from Wrecked Build- c 3 as cae tu ave utilized C1 n ings and Old Foundations. The Stuff is Found to loaded into car ders. Brick frag- Pack and Wear Well wagons. ~ The Brick-Crushing Plant Delivers Its Product the Waiting Cars ments carried wagons to a typic crushing plant, elevated by an end less bucket cor veyor to a pulvet izing drum. Her they are dropp and tossed about INTERLOCKING BASE UNITS FEATURE JACK SET A convenient, interlocking jack set is machinery must frequently be installed now made for the industrial plant where work jacked up on a plane bed, and sim ilar o perat ions pet formed. The set cons of a base plate, and ex tension units of grad height. These may be fixed in any desired co1 bination by means -o! their interlocking joint ir sire senescent Upon the topmost unit Tae Unies are Beterlocted se | placed the rack ja Four Units Are in Use for a operated by an up-an Tool-Setting Job. Below is Seen down motion of a b the Entire Set, Including . A : : Rack Jack, Base Pilate, For the rack jack is su #wo —- and Surface stituted, when required auge : j ; ar? a ee screw which fits into threads in the topmost unit. One of these screws has a check nut and a large, flat head, fo: use in tool setting; t! other has a small swive! ing head for leveling and : : Site awe a similar work.

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POPULAR PIPE AND WALL TILE MADE OF ASBESTOS AND CEMENT Pipe and wall tile made of 85 per cent rtland cement and 15 per cent asbestos er are now being manufactured in noa, Italy. The pipes, ranging from 1°” 12 in. in diameter, are much lighter iron pipe, support a maximum pres- of 450 Ib. to the square inch, and icid and corrosive-proof. These ties, combined with a surprisingly production cost, qualify the pipe for neral use, as for long pipe lines and 1 oil refineries. The manufacture most entirely a machine process, each four machines now in use having capacity of about 3,000 ft. From achines the pipes are taken to tanks here they are seasoned in water for 90 fore shipment. The wall tile is lar to the pipe, but is ornamented in imitation-rock and fin- i dull glaze. b¢ surface TRAVELING CASE CONTAINS COMPLETE DRAFTING KIT convenient, portable drafting kit is made to enable the civil engineer to drafting in the field, and so avoid e burdensome accumulation of notes to vorked out on his return. During el, the kit is carried in a leather case, 6 by 18 by 24 in. in size. When pened for use, the body of the case is tain a small drawing board, ling notebooks, textbooks, paper, ink, Sewed to the inside of the cover to con re two capacious pockets for instru- ent set, triangles, and curves. Leather ps, in addition, hold T-square, slide rule, and other things. As He Travels from Job to Job, the Civil Engineer Carries His Notebooks it is The Traveling Case has and Drawing Tools as Pictured at the Right. been Opened at the Left to Show the Neat Manner in Which the Com- plete Equipment is Packed MECHANICS 89; MACHINE QUICKLY BURNISHES AUTO-ENGINE BEARINGS In overhauling an automobile, the op- eration of burnishing the engine bearings ordinarily requires several hours of hand The Automobile Engine is Clamped to the Bed of the Machine, and Its Bearings Quickly Burnished labor, and then is not always satisfactory. A motor-operated machine now on th market holds the engine block of a small auto or tractor on its bed and “burns in’ the bearings to a perfect in halt an hour or less. It tions per minute. Surrace lll runs at AMERICAN BETTERS BALBOA'S TIME ACROSS PANAMA asco Nufiez de Balboa, discoverer of he Pacific Ocean, walked across the Isthmus of Panama in a little less than a month. A wealthy Amer- ican globe trotter of Norwich, Conn., recently turned the trick between sunup and sundown of the same day. Eleven hours of fast walking, in fact, inter- vened between his morning plunge into the \tlantic and his evening bath in — the Pacific. The Ameri- can has walked through many historic regions of Europe, North \frica, and the Holy Land. be- sides rambling much about his own country. His feat at the Isthmus, however, was the first to gain him local fame. New spapers ot Panama 5 speak of his hike as a record Only a performance. trained athlete, felt. will be able to better the globe trotter’ time.

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898 POPULAR MECHANICS CEMENT PANELS ADD BEAUTY GASOLINE THIEVES DECLARE TO UNUSUAL FURNITURE WAR ON MOTORISTS Cement and sea shells seem queer ma- The motorist is warned that he n terials for the manufacture of household now number among his enemies, in a aoa _. tion to the tire thief tool thief, and the arist cratic auto thief, a : species—the gasoli: thief. Recent captur made by the _ polic eastern cities prove the tool favored by latest scourge is siphon. Thus equip; the thief drives up to standing’ car, removes t! cap from the gas tar and inserts the end of tl rubber tube. Che othe end, of course, is in own tank. To start flow the thief simy sucks the tube full. How ever, one siphon discovered has a rul bulb near the end of tube; with this « The Shell-Studded Cement Panels Decorate a Fern Rack and a Pedestal. Narrow Wooden Strips Hold the Odd Panels in Place clippe d shut, and w the other end resting furniture, but a middle-western cabinet- the victim’s tank, a single compr maker, utilizing them, has produced some and expansion of the bulb fills the extremely attractive articles for the Che clip is then removed and the home. Two especially noteworthy exam-_— starts. The police point out that a lox ples are a fernery and a pedestal, both tank cap offers the only security ag made from California redwood, and embel- the gasoline thief, lac} t lished with shell-studded cement panels. — lhe contrast between the bright-hued LIFE-SIZE DUMMY CLOTHED IN POPCORN wood and the imitation stone gives the pieces an unusually pleasing appearance. (he panels are held in place by narrow The life-size clothing dummy exhibit wooden frames, secured with sere Ws. recently in the display window of a ¢ confectionery WORKERS SEE DRAMA PLAYED store might hae BY DEAF-MUTE COMRADES oho ggermig ose Several thousand employes of an indus- his hat.” For the trial corporation in central Ohio recently hat was covered were entertained by a group of deaf- with popcorn, mutes, also employes of the company. part of the corn The strange, silent entertainment took being colored to the form of a one-act farce. The actors resemble a_ hat- spoke their lines with their nimble fingers band. The suit alone; but so well were they drilled in’ was of a thin ma- the arts of pantomime that every situation terial, which had “got across.” Surprised and delighted by been similarly en- the effectiveness of the performance, the crusted with the normal workers are now preparing to’ kernels, and then entertain similarly their handicapped draped upon the’ comrades. The scores of these employed figure. The shoes by the company are grouped together in were covered with kernels colored brow what is believed to be the largest deaf- to simulate tan leather. \lmost mute colony in the world, pounds of unpopped corn were used.

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(WARRING THE COULEE CRICKET TO EXTINC TION ' Py [Horace E. Thomas ANS \ tte A Close-Up View of the ‘Coulee Cricket” in Its Native Habitat, among the ‘“Scabland’’ Sagebrush That Flourishes Only on the Most Unproductive Soil. The Cricket Lays Its Eggs around the Stalks A! TER a five-year campaign that was laugh at would-be poisoners, were h 44 »lanned and conducted with all the able to express his emotions. For after itegy that might characterize a major the cricket has passed his early youth, litary movement, the “coulee cricket” poison has little effect on him; a titbit heen vanquished. There was no ar- of Paris green or white arsenic adde istice and no surrender, for the coulee to his daily menu means _ absolutely uught to the last, but the armies in which nothing to him, except that he will he was wont to swarm over certain dis- be on hand for more the f ricts in the Pacific North- ing day. It was, there- have been eradicated. ’ ae oe. * fore, necessary to adopt lf a few stragglers put in i ae ie new tactics, and they have i appearance this spring, “k* rm tes been worked out with they no doubt will, their m ingenuity that complete- hance of attaining an age — ly thwarted his cricket | four months, which is ship. cricket equivalent to §@ _ a The coulee cricket hree score and ten, will . Ss j 2“ one of the rarest species very small indeed. The Si ?« m=. in the cricket family. ules cricket is on his : . yo deed, it is not iy to extinction. : : és - cricket at all, th the war on this little- Pia 2) ing a wn pest has been en- eta a — has irely different from the be feet, inst« ordinary attack on unde- a 4 m there are other minor dis sirable insects. Poison, § ' : me §6tinctions that differentiate which is generally the § . ‘ati oe it from the true cricket chief, or sole dependence ; me Peranabus — scabricollis in combating such a ee mee its scientific appellatio scourge, failed to solve the : . —_—— but it takes its more com- problem in this instance. BaRae Evatt 82 Weta mon name from the cha g F i F ay , No Attention to the Insects That acter of its habitat. It ble to poison, if it is Crawl over Them found only in the stat served to them in just the right combina- of Washington and there only in tw tion and under favorable conditions, but counties, Grant and Douglas. These they will eat it only in moistened food, clude a low-lying region in the centr and the habitat of the cricket is the dry part of the state, known as the Big Be ind desolate desert where poison bait will country because it lies within a great not retain moisture for any length of bow made by the Columbia River. time. As for the mature cricket, he would exception to this is the recorded appea:

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900 ance of the coulee cricket in Montana, but it did not thrive there and has not been noticed for years. Board Walls or Fences, Topped with a Galvanized- Iron Plange, Are Quite Effective in Stopping the Crickets, hich Have No Wings This species of cricket is named for the coulee where the colonies make their home. “Coulee,” in the Pacific North- west, designates —-_ any dry _ water- course, large or small, deep or shal- low. Although technically a coulee has sloping banks, this _ distinction from a cahen is not observed lo- cally. In these coulees the crickets have their egg beds and spend the early stages of their lives. If it were not for the rocky, uneven character of the soil, which prevents plowing or spraying, it is probable that the young crickets could be attacked successfully before they begin their migrations. Few insects have the migratory instinct developed so highly as has the coulee cricket. They travel miles and always in great swarms. Most of the region they infest is wild country, barren of nearly all vegetation except the “scabland” sagebrush. Here and there, however, some rancher has developed a more promising piece of land. When _ the crickets start their march they sweep the country clean, and when they come upon a cultivated field, the grain and vege- tables are a particular treat to them. The few residents in the coulee district were powerless to make an effective fight against the pest, but they have had state Journeys. The Young Crickets Often are Destroyed by the Use of a Blast Torch Before They Start Their Migratory its This Method Is Also Very Effective in the Ditches POPULAR MECHANICS e and government aid, and through these agencies the fight has been won. The coulee cricket was first observed in this part of Washington many years ago, but there was not a bad “cricket year” until 1915. Then it devastated large portion of the two counties that it imfests. It was then, too, that the fight against the cricket was taken up in a serious and systematic way. Each year since then the fight has been resumed Methods of extermination have been improved and the cricket bands hay diminished, at first gradually, then rapidly. The cricket is very partial to the “scab- land” sagebrush, a dwarfed plant that thrives only in rocky and otherwise w productive This bush sheds its needles, which form a porous carpet b« neath it. Around the stalk the cricket lays its eggs, depositing them singly i: stead of in clusters, as in the case of most insects of this sort. When th baby crickets hatch in early spring, they bury themselves in the sagebrush needles and_ thus find protection against the _ cold The cricket has an interesting li f « cycle, divided into seven stages, sep rated from ea other by molting processes. It is the fifth stage of brief existen that its pronounc: migratory tend cies develop into a yearning for a chang of scene. Then, uninfluenced by conditions, winds, the lay of the ground or anything except mere ce, soil. food chan One Corner of a Cricket Trap, Made of Boards with a Flamge on Top, an Impassable Barrier for the Migrant Insects

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far as may be observed, they depart n great numbers on their journey ot destruction. May and June are the months of their migrations, and also the that they lay their ros, time egg In July the short life span ended, but not efore they have planted sufficient ggs to perpetuate species in in- reasing numbers he following pring. lhe farmers first ied poison to rid hem of the pest. scattering mix- ures of arsenic ver the hatching rounds consider- ile inroads Though Much like One. were ade on the irms emulsified kerosene also was ed as a spray, a power pump being ploved where the character of the round would cither method impossible permit its operation. was a real solution; it to keep the poison bait oist and appetizing to the he kerosene has no effect heir second molting and on them after period. Another crickets, ethod was to scatter piles of straw over the breeding grounds. The crickets ould seek shelter in the straw at night, nd by burning ir ea early in the morning great umbers_. of POPULAR MECHANICS

The Coulee Cricket Is Really No Cricket at All, Feet Instead of Three, and Some Other Minor Points of Distinction

901

as they advanced and, once in, were caught, tor the insect has no wings and cannot climb the overhanging walls of the ditch. The crickets first trapped would be smothered to death by those that tumbled in on top of them, and the process would continue until the ditch was_ full. Then the usual method was to burn the crickets with a blast torch and make room for a new catch. Some- times the dead crickets were strewn along the trenches to dry in It Has Four Joints to Its the sun, making excellent poultry It was custo mary, too, to dig pits, 3 or 4 ft. intervals of about 30 ft., trenches. These pits would feed. 3 deep, at th prevent a along continual movement of the crickets along the bottom of the trenches. The canni- balistic habits of the crickets are an aid to the own extinction. \n injured cricket is at once pounced on and de- voured by his companions. Fences built of 8-in. boards have now almost completely replaced the trenches Fences are less costly and can be moved = from one place to another as required. \ 3 in. strip of ga

them would be vanized iron remated. Blast overhangs the torches fed by top oO f the asoline we re al- board and so used with tell- prevents t he ng effect where crickets from the crick ets climbing over, vere thickest in The fences are he sagebrush. usually built in \fter ex peri- a V-shape, with menting with a big pit at the these methods, apex, The trav- the scientists — ’ <4 ( ling crickets who were called The Cricket Fences, to Be Effective, have to be Built Right \\j]] wander . : across the Highways. Gates are Provided for Traffic, and ; ° in to direct the Long Spikes Keep Autoists from Driving over Them along the fence campaign finally until they tum- concentrated their efforts on the capture ble into the pit. after which they are of entire armies by ditches and pens. burned. Sometimes, instead of pits, Ditches were used first, but required so traps are built. These traps, constructed much labor that pens were generally of boards like the fence, are simply in- substituted last year. The ditches or closures. about 20 ft. square, into which trenches were dug to a depth of a foot the crickets are diverted. \ttendants across the path of the moving army. The crickets would tumble into them as fast

have to be on hand to burn the crickets as soon as the traps are full; otherwise

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902 the late arrivals would walk over the bodies of the others and so escape. At times the traps have to be emptied sev- eral times daily. The infested part of Washington is a network of these traps and fences. Prob- ably 50 miles of cricket fence were built last year. One continuous barrier was i2 miles long. Of course, the fences inust be laid across the public highways. In order that they should not interfere with vehicles, movable gates were con- tructed. At first automobilists paid lit- tle attention to the low tences, driving over them withouc taking the trcuble to POPULAR MECHANICS open the gates. This was remedied by driving nails through the boards, with poimts protruding. One puncture was enough to convince any driver that the best policy was to open the gate instead of driving over it. Ranchers in this part of Washington hail the eradication of the cricket as their deliverance. As long as it existed, they did not know what day their fields might be devastated. Scientists say, too, that if the problem had not been met promptly the colonies would have continued to grow until they infested a much larger and richer agricultural area. SMALL PORTABLE BAND SAW FELLS AND CUTS TREES An endless saw blade, running on four pulleys in a small U-shaped frame, and driven by an extension shaft from a light motor, is a new European invention for felling trees and sawing the logs into short lengths. By conveniently arranged handles, the saw blade at the open side of the “U” is pressed against the tree trunk, i For Cutting Logs, the U-Shaped Frame of the ! Band Saw is Simply Low- ered onto the Work, in Which the Motor-Driven Teeth Sink Rapidly WIDE WORLD PHOTOS Standing Timber is Easily Felled by Holding the Saw Horizon- tal, While an Assistant Keeps the Motor and Its Shaft in Line. The Machine Works Close to the Ground, and Cuts 12-Inch Trees at the Rate of 500 a Day the cut being made very quickly, and close to the ground. Where the trees are of an average diameter of 12 in., it is declared that more than 500 can be cut in a working day. MILES OF TELEPHONE POLES MOVED WHILE IN USE To accommodate the building of a high- way between two eastern cities, the local telephone company recently pet formed the remarkable feat ot moving its entire pole line, 430. poles, 10 ft. to one side wit! out cutting a circuit or interrupt ing service on any of the wir The work was done by six met in two gangs, with five pole jack for lifting the poles from their holes. It was started by raising the first five poles one foot, the going back and raising the firsi four another foot, and the fir three another, and then the first two a total of four feet. Finall the first pole was lifted ck of the ground, and railroad over to the new hole prepared fo it by sliding it 10-ft. oa plank. One pole now out of t! way, its jack was shifted to t sixth pole, which thus be the last in a second grou of five, and the whole proc was then repeated. In this way gradually shifting the first pol of successive groups entire line of some moved in a total ol on a one ' f five, th miles wa 3.010 labor ( ? I of hours, or seven per pole. @ Residents of Ketchikan southern Alaska, will soon put ice to distant villages. chase a large seaplane for serv-

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POPULAR MECHANICS

a A me | Pr ih Ser = os "ied > —— a A Dwelling House Built with Hollow Walls of Coke Concrete, Which after uplifying the placing of Completion are Plastered Inside and Stuccoed Outside, terior wood trim. Ex- with a Waterproof Coating rience with this curious building mate- dispensed with in the preparation of a ial demonstrates that it possesses great wall built of coke concrete for its coat of trength, is economical, and lends itself plaster. to rapid construction. The coke screen- —_—_—- ngs used, known to the trade as “coke @Use of the tower system of regulating breeze,” at a price of $3.50 a ton, on one traffic on Fifth Avenue, New York City, h cost about $2.50 per cu. yd. delivered, has resulted in a traffic increase of 100 ich was cheaper than gravel. Even at per cent. In consequence, experiment a price as high as $8 a ton, it is asserted with the drastic one-way plan has been that the finished walls would cost less postponed indefinitely.

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904 NOVEL INTERIOR TELEPHONE HAS NO MOUTHPIECE One of the defects of the standard form of telephone is that the user's lips too readily become separated from the *e The Telephone of Curious Form is Seen at the Left Hanging from the The Back View, at the Right, In the Center Is the Compact Connector Terminal for the Intercommunicating Circuits Switchhook of Its Intercommunicating Dial. Shows the Switching Mechanism. mouthpiece, giving poor transmission. A new type of intercommunicating telephone escapes this drawback by making a mouthpiece wholly unnecessary. A light receiver and transmitter are combined in a single unit, consisting of an earpiece with a small horn projecting at right angles from it. The mouth of the horn, in use, rests not in front of the lips, but alongside of them, in which unusual po- sition it is highly successful in collecting the sound waves. The unit is hung by a switch hook on a wall box carrying a dial and pivoted arm, turning which con- nects the set to any desired line. MUCH PULPWOOD IN ALASKA AWAITS FACILITIES Approximately one-third of the coun- try’s entire consumption of pulpwood products, or some 2,000,000 cords of wood a year, could be supplied by the spruce and hemlock forests of Alaska. It is esti- mated that there are fully 77,000,000,000 hoard feet of standing timber in the na- tional forests, which have a coast line of 12,000 miles. These vast resources will be open to use, however, only after over- coming immense difficulties of installation and transportation, which so far have proved too great for successful enterprise. POPULAR MECHANICS SCIENTISTS STUDY PRACTICAL USE OF ENORMOUS PRESSURES Recent activities of several French scientists have aroused chemical engi- neers on the Continent to the possibility of the widespread use of tremendous pressures in everyday industry. It will be remembered that, when air was liquefied, some years ago, pres sures of 150 to 200 at mospheres were em- ployed, and were re- varded as the limit of the possible. But thes l‘renchmen speak easily of 1,000 atmospheres one-half to one-third, that is, of the pressure found in a gun barrel at the moment of discharge One apparatus developed by them is a simple af- fair of plunger piston ie which compresses 100 cubic meters of hour to 1000 atmo pheres. They emphasize the simplicity of their showing that cup leathers be come more effective as pressure increase while tight joints, generally, are more easily made with higher pressures. A an experiment, they immerse the joints connections, and valves of their compre sor in water. Not a bubble is seen whe the maximum pressure.is being devel- oped. This result, they claim, shows th« practicality of such high pressures. gas an machines, DAM BEING BUILT TO POWER GOVERNMENT NITRATE PLANT To get power for its nitrate plant at Muscle Shoals, Ala., the Federal Govern ment is now building across the Ten nessee River one of the world’s largest masonry dams. Located just south ot Florence, Ala., the completed structure will contain nearly 1,000,000 cu. yd. of concrete and will be nearly 100 ft. high and more than 4,000 ft. long. Large tur- bine wheels at the southern end of the dam will generate 300,000 to 375,000 hp the greater part of this for the nitrate plant. Cutting the northern end at right angles will be a series of locks, each 60 ft. wide and 300 ft. long, by means of which the river will be kept open for navigation. That the dam may be com- pleted soon, extraordinary measures are

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POPULAR MECHANICS 905 [he Government Nitrate Plant at Muscle Shoals, Alabama, is Soon to Draw Its Power from Water Impounded the Great Dam Whose Foundations are Seen Above. Turbines, Installed at the Southern End, are Expected Generate 300,000 to 375,000 Horsepower. A Series of Locks at the Northern End will Carry River Traffic between the New Water Levels taken to speed the work. Most re- heavier tanks, 200 of these speci il cars ible is the temporary timber bridge, were built, and were used until the armis- yn the dam apron, which is soon tice tor thus expediting the delivery of ry five parallel tracks, four of stand- the machines that played so important a cauge for the material trains, and a part in later allied victories. In loading ich wider, for seven traveling der- at the arsenal, the tank was run upon (hese will lift the concrete from car and maneuvered into traveling posi- rs and place it where desired. tion under its own power. Blocks and heavy chains held the tank firmly to the TANKS CARRIED FROM ARSENAL scar during the trip to the coast, across TO FRONT ON SPECIAL CARS the Channel, and to the French railhead. When tanks destined for fighting serv- @To the name of every married man on the western front were completed listed in the 1920 edition of the St. Loui british arsenals, it has recently been “Red-Blue Book,” or directory, is ap- ealed, each was loaded upon a special pended in parentheses his wife’s first it car which carried it without reloading mame. A glance now shows which men tank depot in France. To carry the are married and which are not The Scene in the British Arsenal Yard, at the Left, Shows a Tank Maneuvering Itself into Position upon One of the Special Flat Cars. Chained to the Cars, as at the Right, the Tanks were Carried to the Front

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906 POPULAR MECHANICS This Big Sign was Carried through the Streets of a Small Iowa Town on a Recent Saturday Night ¢t Advertise Church Services on the Following Sunday. The Generating Plant for the Many Red and Blue Electric Bulbs was Mounted in the Truck Body AIRPLANE PROPELLER ON AUTO MAKES BREEZE FOR MOVIES Impatient movie directors are respon- sible for many an ingenious substitute for the works of nature. A _ producing MONSTER SIGN ON AUTO TRUCK ADVERTISES CHURCH SERVICE Down the main street and twice around the public square of a small town southwestern Iowa there passed, on company taking a woods scene in south- ern California the other day ran into a dead calm just when the scenario called for wind in the trees, and plenty of it. So, at the producer’s direction, the com- pany hoisted a light auto to the top of a pier of logs, removed a rear wheel, and fastened an airplane propeller to the axle in its place. The resulting artificial wind- storm could be regulated to any required severity, and made as realistic a picture as could be desired. An Airplane Propeller, Installed on the Rear Axle of an Automobile Mounted on a Log Pier, Made a Realistic Windstorm for a Company of Movie Players When Nature Declined to Provide a Breeze recent Saturday evening a curious caravan. First was seen a touring car, i which rode two men with megaphones. nounced services to b« held on the morrow in local church. The clinching the impressio1 made by the announce ment on the holiday crowd, came a large let tered sign, 40 ft. long and 3 ft. high. This bore th vords “Christian Churc! Come,” bordered by bunting and by red and blue electric lights. Th: sign was carried on an auto truck, in the body of which was the gen erating plant for the many bulbs. One farm tractor pulled the truck another, for symmetry’s sake, chugged along behind the truck. These an STATE SENDS YOUNG TOILERS BACK TO SCHOOL The young people of New York State who have been forced to leave the gram- mar grades to seek employment are now going back to school at their employers expense. The new state law requires all boys and girls under 18 years of age, who ’

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POPULAR MECHANICS have not finished their common-school education, to attend -part-time, or “con- tinuation,” schools, as they are called, for four to eight hours a week until the lost schooling has been made up. To put the system into full operation, the law gives the Board of Education of New York City five years. At the end of that period, it is estimated, 200,000 young toil- rs will be under instruction. Already schools, two in Manhattan and one 1 Brooklyn, are open, and are offering surses of the most practical kind. The hoys may study carpentry, sheet-metal ork, electric installation, architectural lrawing, office practice, and any number other subjects. A similar variety is ffered the girls. , three Loree THEFT ALARM SOUNDS LOUDLY WHEN AUTO IS MOVED \n automobile-theft alarm devised by Nebraska inventor utilizes the drive haft to operate its own bell or horn ignal when the car is improperly moved. The Alarm, Contained in a Steel Case as Seen at the Left, Has a Signal Horn or Bell Operated by the Shaft of the Car, as Indicated Above friction gear, thrown into or out of ngagement with the shaft by a cam, is closed with the alarm in a riveted steel ise, fixed to the shaft housing and radius ds. The cam also short-circuits the magneto, so that turning the key in the lock stops the engine and sets the alarm. he lock is located in the floor of the driving compartment. —_—— CYCLE SERVES AS “AMBULANCE” FOR “SHOE HOSPITAL” Worn footwear is regarded by the proprietor of a western-city repair shop, which is known as a “shoe hospital,” in the same way that sick or injured persons are looked upon by the medical profes- sion. A motorcycle, equipped with an 907 appropriately lettered package box over the rear wheel, serves as an “ambulance,” in which “patients” are brought to the 3 “Ambulance” Used by a “Shoe Hospital” in a West- crn City: The Machine Serves as a Delivery Vehicle and as an Advertisement shop for “treatment,” and delivered to their owners after being “cured.” The machine has proved to be an effective advertising device. CHOPPING-BLOCK BASE MADE OF STEEL AND CONCRETE A chopping block of steel, wood, and concrete has now been invented to replace the heavy wooden structures found in every butcher shop. The body of the new block is made of sheet steel, and is partly filled with concrete to give rigidity and weight. In the lower part of the block a steel drawer is provided for knives, skewers, etc. The feature of the block, however, is the top, or head, which though of ordinary laminated-wood construction, is only a foot or so in thickness, and is removable. When worn by much chop- ping, the top may be removed, in conse- quence, and a new one substituted for it. The Steel-Concrete-Wood Chopping Block is Seen ere in Front and Cross-Sectional View. The Wooden Top Is Removable The new chopping block is otherwise comparatively indestructible.

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CIVIC FEATURES THAT PROMOTE THE COMFORT 6 > lp « ~$ wy + To Help the Public- School Teachers Resist the Lure of the Oil Fields Near By, the School Trustees of Sycamore Heights, Texas, have ErectedThis Comfortable Cottage. Here, the E tireFaculty Resides with No Rent to Pay One of the Oddest of the After-the-War Monu- ments Is This ‘“‘Y-Gun,”’ Complete with Its Ash- \. cans, or Depth Bombs, in a Business Section of San Diego, Caii- a fornia i itc , Dug in ‘ ay Bk Big when J at en. This Scene of Sylvan Beauty is Reached by a 15-Minute ver, Colorado, This Tree was Not Walx from Chicago’s Busy Loop District. The Tropical Moved. It Hung, Suspended Flora Is Part of the Permanent Display in the Palm House from Two Timbers. Until the at the Lincoln Park Conservatory. A New Feature, However, | Work was Done. The Dirt was Is the Rustic Water Wheel. It Measures More than Five Then Shoveled Back, and Tamped Feet in Diameter, and is Turned by Water from a Little L about the Roots Streambed of Artificial Stone OS

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AND ENJOYMENT OF VISITORS AND RESIDENTS i » 2 4 > sy, Keer 4 J» ? , These are Some of the Shelves of the Codperative Grocery Store Maintained rt erererert rroocre by the Letter Carriers and |[CSP@rerpterecererr Postal Clerks on the Top | EF ercrerererr: . ar GEE rary Floor of the Federal Build- : ing in Newark, New Jersey Livingston County is Believed to Be the First in Illinois to Erect a Monument to Its Service Men of the World War. The Monument, in the Form of a Graceful Arch, Stands in the | Courthouse Squarein Pontiac, Just behind the Civil War Memorial For the Convenience of Pedestrians the City of Flint, Michigan, Last Winter Placed Wooden Platforms at the Trolley Stops in the Main Streets. Besides Keeping Feet Out of the Snow and Slush, the Platforms Served as Safety Islands, Offering Pro- tection against the Danger of Collision | Traffic Sultenenen in the Seem — Streets of Kansas City, Missouri, are Protected from Extreme Weather Conditions by These Galvanized-Iron Shelters. They were Presented by a b Local Manufacturer

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910 BIG VACUUM MACHINES SWEEP FLOORS OF TEXTILE MILLS To replace the large hand brooms used for sweeping out textile now manufactured a self-contained vacuum floor sweeper. It stands a little over 3 it. high, ) but is made only 1612 in. wide to permit its passage through the narrowest a lley s be- tween spinning frames. electricity for the 's-hp. motor is furnished by a nine-cell storage bat- tery, in the top of the machine. .\ useful fea- ture is the application of the discharged air to blowing lint and waste from beneath spinning frames into adjacent al- leys, where the stuff can be picked up later. As sweepings do not en- counter the fan, spring bands, bobbins, and other parts can be picked up without work- ing any injury to the mechanism. FIRM ERECTS MILLION-DOLLAR BUILDING FOR EMPLOYES One of the largest and best-equipped = a buildings ever erected for the purpose 1s POPULAR mills, there is This Self-Contained Vacuum Sweeper has been Developed for Use in Textile Mills. The Arrows Indicate the Course of the Air the theater ture Erected for the Employes. In Rainy Weather the Basement is Reached through a Tunnel Which Passes beneath the Street, at the Right MECHANICS million-dollar, recently completed by a great industria corporation of Akron, Ohio. which gymnasium with a floor space measuring DETROIT GAINS DEEP WATER BY DREDGING ROUGE RIVER Seven miles of dock frontage on de water will be added to the maritime f: cilities of the city « Detroit by the compl tion of the task, ju undertaken, of dredgii River- Rouge. being given a_unifor: depth of’ Zi) ft... the channel will be straight ened by cutting some and made fro: to 500 ft. wide. | then accommodat: lake freighters up to 2 ft. draft and 600 ft. long and be prepared to ha: dle traffic the St. Lawrence water- Way is developed. Nine bridges must | changed to suit the n¢ channel, and plans are under way for improve: dock and warehouse f; cilities calculated to de velop the most effective use of the new shippins terminals. Beside Cana across bends, 200 ort it will ocean whe seven-story structur: It contain seats 2,000 people; a 172 ft. by 100 ft.; room for the meetings of the so-called “industrial as- sembly”; a community room for men, a library a pool room, music and writing rooms, dormi- tories, classrooms, and a cafeteria. On the sevent! floor is a well-equipped motion-picture plant, where educational film are made, and projected for the instruction of the employes. In the base ment are 3,000 lockers 12 bowling alleys, six rifle ranges, a checking room, and a barber sho; A tunnel from the ma factory building, the street, gives to the basement. acTro acct

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POPULAR MECHANICS 911 “TENT SHEETS ROLLED AND LASHED BARS AND UPRIGHTS hen Camp is Broken, the Canvas Side Walls are Rolled and Lashed to the Gun- wales. The Cot Framework and Supporting Uprights are Collapsed and Become the Floor Rack. These Arrangements are Seen in Cross Section Above | | ] iere One of the Canvas ie Walls is About to be Rolled and Lashed to the Gunwale. The Picture Shows More Graphically than the Diagram How Neatly the Bars and Uprights Fold into Place on the Bottom INVENTION TURNS CANOE INTO SLEEPING PLACE Young men who like to take extended canoe trips need not worry unduly about what it is going to cost them to stay overnight at hotels on the way, for a new invention furnishes a combination canoe tent and cot not in the least affected by hotel rates. This invention makes it pos- sible to utilize the canoe in the form of a lean-to, thus providing the roof of a tent and in addition supporting flies that form the walls of the tent. The stand- ards that support the canoe in inclined position, with one end resting upon the ground, are connected at a_ suitable height from the ground by means of a crossbar, which forms one end support for the cot. The folding cot, supports for the canoe, and tent sides can be clamped within the canoe. @The Navy Department has put up for public sale one hundred and fifty 110-ft. submarine chasers, built during the war at a cost of $67,000 each. The selling price will probably be a third of this. Camp is being Made, at the Top. The Canoe Forms the Tent Roof. TheSide Walls, When in Posi- tion, Serve to Brace the Structure GAS-HEATED GLASS CUTTER LIKE SOLDERING IRON With a little tool lately put on the mar- ket by a laboratory-supply house, glass can be cut like paper. In appearance the instrument resembles a hollow, gas-heated soldering iron, with the gas inlet at the end of the wooden handle. When the tool is to be used, it is connected to the gas supply by a rubber tube, and a match is applied to the working head. The gas flow is then adjusted until the flame strikes back, or burns within the head. While the head grows hot, a deep file Head at the Left. Gas is Admitted at the Right mark is made at the beginning of the line to be cut. By melting the glass along this line, the hot cutter prolongs the mark.

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912 POPULAR MECHANICS NAVY’S LARGEST BATTLESHIP SLIDES FROM WAYS The American superdreadnaught “Maryland,” one of the most formidab\, iin _. battleships in the wo was launched with pre-war ceremony Newport News, a f« weeks ago. The k was laid almost thr: years ago, just 18 da in fact, after the Unit States declared y against Germany. T]! delay is explained by t! wartime preceden, SMALL GALVANIZED-IRON DAM FITS ANY IRRIGATION DITCH For checking the flow of water in small lateral ditches, or backing it up to any given to the constr —————— ee : » -_ i, The Galvanized-Iron Wings of the tion of destroyers. he) 8 Adjustable Dam have been Extended the armistice, howeve1 Fully. Further Extension is Stopped the work has be« by a Clip on the Upright rushed, and the vessel ee P ee rr . ; ors ay ea, now nearing comp oi om It will be electrical] driven by four propelle: _ — — wae e furnish Above, the Wings POWer being furni h have been Retracted by turbines of 29,000 hy to Dam a Ditch of aes 2 eae Small Size Steam w ill be generat by eight oil-burnin boilers. Measuring 624 ft. over all, The Iron Upright and the Two Wings have Here been Forced into the Bottom and Sides of a Lateral Ditch required distance, the irrigation farmer has been accustomed to extemporize, at considerable expense in time and labor, little dams of loose earth. As a substi- tute for this practice, however, he may now use small adjustable dams, which he simply thrusts into the ground, and as easily removes. Each dam is made of two wings of galvanized iron, so pivoted to an iron upright that they may be forced down to obstruct any ditch of ordinary size. STEAM WHISTLES TO WARN OF PRISONER’S ESCAPE Powerful steam whistles which can be heard for miles around are to be installed at the brick plant at Junction City, Ohio, operated by prison labor, and at the prison farm near London, Ohio. These whistles will be blown to warn the people of the surrounding territory in the event of a prisoner’s escape. With farmers and townspeople on the alert, few prisoners, it is felt, will be able to make a clean get-away. weighing 32,950 tons when loaded, “Maryland” will be the largest fight craft ever built for the American It will be unique, too, as the first ship of any nation to carry 16-in. guns. Eight of these monster rifles will be carried four turrets, two forward and two aft The stipulated speed of 24 miles an hot will probably be exceeded at the trials. COLLAPSIBLE PASSENGER SEAT -~FOR REAR OF MOTORCYCLE For carrying a passenger on a motor cycle, an English inventor has devised a navy comfortable fold- . E a ee ing rear seat, Pa which can be used vg. as a luggage rack tl tome ‘ef " ‘ when unoccupied. a The accessory is Lena composed of strap 67 rh \ metal, and pro- \ ioned back and a paces \\' \ canvas-covered leg Fo —¥- ¥ \ serving to protect =: ie Gere frogy Seer eran shaped spring supports the seat. Smal! bolts are employed for attaching the con vided with a cush- rest, the latter the wheel of the machine. A long U trivance crosswise over the fender.

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POPULAR PARIS TO HAVE WORLD'S LARGEST HALL Construction will soon start, it is an- sunced, on one of the world’s largest halls. Built in Paris by the French gov- ernment, the structure will be completed in 1924, and will be used for horse shows, rricultural exhibitions, and the like. The monster hall will be 1,427 ft. long, 377 t. wide, and 177 ft. high, and will cover 5 acres. Many acres in addition will . cleared of buildings, and transformed to gardens as a setting for the building. \Vorkmen have already started to clear an area near the St. Cloud gate in the old rtifications, in preparation for the lay- ir of the foundations in the summer. NEW HEATING SYSTEM EMPLOYS PORTABLE BLOWER UNITS For heating the spacious interiors of indries, machine shops, and similar in- dustrial structures, there has now been evolved a heating system of marked economy, flexibility, and efficiency. The system requires that a number of heating units be disposed to best advantage about the plant. Each unit consists of a metal cabinet, mounted on an angle-iron pedes- tal, or hung from the ceiling. Each is open at both ends, and contains two steam coils and a propeller fan. Air drawn into the cabinet at one end is heated by passage through the steam coils, and is discharged with increased velocity by the fan at the other. A broad deflector at the discharge end can be ad- justed to send the warmed air to the floor at any desired angle. In hot weather, obviously, the units can be used as coolers, or ventilators, by operating the fans with- out steam in the coils. Fr ny ——aes 4 CHAUFFEUR’S REPAIR CRADLES MADE IN COLLAPSIBLE FORM Small cradles for the chauffeur who must occasionally work beneath his car have been in use for some time. Here- tofore, they have usually been crude, and of home manufacture. A cradle may now be purchased, however, which collapses MECHANICS 913 into such small compass that it can be carried under the rear seat. It is formed of seven wooden slats, with four remov oe ae Rho: ered lag EE , = The Bottom of the Cradle is Shown at the Top. Below, the Cradle has been Collapsed; the Head- rest is Seen at the Right able ‘casters, and a detachable, leather- padded headrest. Lying at full length upon the cradle, the chauffeur or me- chanic can easily pull himself to any part of the car, and there work in compara- tive comfort. SCOWLIKE SKATE FOUND IN WALL OF OLD HOUSE In remodeling an old house in Logans- port, Ind., some time ago, carpenters were surprised to find between weather- boarding and plaster an old ice skate of unfamiliar form. It has no blade; in- stead, it is formed of a semicylindrical piece of steel, corrugated to present eight sharp edges to the ice. The only legible inscription on the skate is the date of From the position patent, April 16, 1802. The Quaint Ice Skate Came to Light during the Remodeling of an Old House. The Bot- tom View, atthe Left, Shows the Corrugated Surface; the Top View Shows the Heel and Toe Straps in which it was found, the finder con- cludes that it fell from the attic, prob- ably causing a mystery that perplexed some small boy, many years ago.

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SOME NOVEL AND LITTLE-KNOWN ACCESSORIES Twirled between the Palms of the Hands, or Used asa Beating Spoon, This Little Utensil Quickly Mixes Liquid Ingredients. It is Made Entirely of Wood, So Never Rusts, and Seldom Breaks This Grater Has a Boxlike Container for the Nutmeg. Lge ae / COPYRIGHT, PUBLISHERS’ PHOT Clips Hold the Box and the - . In the Bottom of This Ja Nutmeg Tight against the Cr ae is Concealed a Motor- Driv Grating Surface F -- Pump That Forces a Quart of $ Water Continuously through < Ring with 20 Small Nozzles Pancakes, Eggs, \ and the Like, are Easily — Turned with m\ the Queerly Shaped Knife at the Left

Use of the Semicircular Comb, Above, Makes It Pos- peng ve Any Mother te Her Child’s Hair. The Com c Is Celluloid, with a_Metal o This Brass Pot Holds a Shield and Three Head- Quart of Kerosene and the bands. By Means of a Set- Syringe at the Left. It is screw at Their Junction, Used toStart Fires in Range These Bands can be Adjusted or Furnace

The Angular Cuts in the Rubber Heel at the Right are Said to Make Slipping Impos- sible in the ettest Weather. The Heel is Applied in the Or- dinary Way Enameled-Steel Drain a — wow wees = over the ashtubs ; i i : v sh Paddle is vena saay Apartment. } seach ae ae Motor, ouse chens : ca, 7g This Churn will Produce Butter in 5 to 15 Minutes’ Time. A Hand Crank is Also Provided

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INTENDED FOR THE HOME AND ITS MEMBERS The Suction may be Reversed with This Light-Weight Vacuum Sweeper, and the Handle End Used for Cleaning Draperies, Shelves, Moldings, and the Like A Man can Cut His Hair with This Comb and Blade Just As He Shaves Himself with a Safety Razor. The Blade Holder Is Movable along the Comb This Galvanized- Iron Garbage Can is Kept in the Kitchen Sink. The Tight- Fitting Top is_ Perfor. ated to Permit Draining before Emptying into the Larger Can Outdoors This Odorless, Gas-Burning Incinerator is Designed for Use in the Home. When Suffi- cient Garbage and Other Household Waste has Accumu- lated, the Burners are Lit. Soon the Waste Drops into the Bottom Pan asa Fine Ash Water, Pure, Perfumed, or Charged with Medi- cines, is Quickly Vapor- ized When Placed in the Pan of the Electric Clipped to the Cover of a Notebook or Purse, the Wire Guard Holds It in the Pocket by Virtue of the yo 0g of the Tye . ngles against the This Electric Candle- Pocket Sides. Pres- stick, forthe Bedroom, Lights When Lifted by the Handle, and Goes Out When Set Down = sure is Removed by Squeezing the Two Together The Copper Tub of This Motor-Driven Washing Machine can be Lifted Out for Cleaning or Repair. It Rests upon

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916 POLISH REPUBLIC ISSUES NEW STAMP SERIES The new Polish Republic has just is- sued a series of postage stamps. Those of the smaller denominations measure 1 by

Specimens of a New Series of Postage Stamps Just Issued by the Polish Republic 1Mg in., and bear the Polish coat of arms, the values being distinguished by color. Those of higher value are larger, one of 2.50 marks (nominally 59.5 cents) being 1 in. high and 14 in. wide, with a design representing a sheathed sword standing upright in a field being put to the plow. PROCESS OF FUSING TUNGSTEN MAY INCREASE USEFULNESS Utilization of the many valuable prop- erties of tungsten is hampered by the metal’s extremely high melting point, which is up toward 5,400° F. It is now reported, however, that a European en- gineer has devised a method of fusing and casting it on a commercial scale, the castings being workable into any desired POPULAR MECHANICS form. The new process is expected. among other things, to simplify and im- prove the manufacture of lamp filament It may make possible also the quantity production of tungsten carbide, a sub stance declared to be 98 per cent as hard as the diamond, and useful for grinding, AUTOMOBILE BUMPER SERVES ALSO AS JACK AND LOCK An automobile bumper which does not differ greatly from the usual forms is in- geniously made to act, on occasion, as a lifting jack and a lock, by a Michigan inventor. The bumper is in two parts, which overlap in the center and are nor mally held by a bolt. Separated and swung to a vertical position, they becom

The Automobile Bumper, Half of Which is Shown at the Left, is Seen at the Right Used as a Jack jacks, actuated by a handle carried in th tool box. When the car is jacked up ft may be locked in that position.

GAS FLOW TO WATER HEATER STOPS WHEN PILOT COOLS A thermostatic gas control of remarka- ble mechanical ingenuity, and now a feature of all water heaters made by one to both pilot and main burners when th: pilot is accidentally extinguished. The mechanism consists essentially of a dis cus-shaped chamber with a dividing dia- phragm. Gas to the main burners pa through the chamber on one side of th¢ sses

concern, shuts off the gas supply | | <

The Action of the Gas-Control Mechanism at the Left is Explained by the ram The Discus-Shaped Cham- Ser and the All-Important Dividing Diaphragm are Seen in Cross Section Shaded Portions of the Diagram at the Right. L “YY Y lYYYY \|

diaphragm; gas to th pilot passes through on the other side. When the pilot is extinguished, hy a temporary drop in main pressure, or for other r son, its cylindrical, copper wall cools and contracts and in this way press« a nonexpanding steel! needle against a valve seat in the base of th pilot. Flow to the pilot thus stopped, gas pressur accumulates on one sid —=" of the diaphragm, and s: closes the orifice to the main burners. rm | | ] AM | it} 1) jueue

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POPULAR SHALLOW-DRAFT MOTORBOAT IS HOUSEBOAT AND CRUISER In a Maryland shipyard was recently completed a 45-ft. pleasure craft that is at once a seaworthy motor cruiser, able na “ae - ia a Pnnnnagi aaa aan... 2 “ — 2 water @ Ay . 4 Y | | > | | YA | | / TANKS, EACH -75 GALa LUSH <& OVER | STEERING ! QUADRANT F HATCH MECHANICS — SS —— Pe - = = GAY Aaa SR a Hk 917 by the aid of finely divided - metallic nickel, in the presence of which the oil is heated under pressure, in a hydrogen atmosphere. The nickel itself is not in- volved in the change, except to act as ——— =. 7 = * — —— —— ee - — = os ] All Engine-Room ined through the Hatch 3 SHELVES ‘ GALLEY RANGE —— 1453” movagge SS LADDER? © - yous} Prr& S The Plan View, Above, Shows How Every Corner of the Interior has been Utilized. Berths for the Crew Foid against the Side When Not in Use. » make a good 14 miles an hour, and a comfortable houseboat with such small draft that it may be taken into the shal- lowest Florida waters. Comfort for the four guests and the two hands is attained by keeping the deck clear for lounging purposes, and by utilizing every corner of the interior. Forward is the engine room, with an 80-hp. gas engine, berths for the crew, a workbench, an ice chest, and a complete galley. Amidships is the sa- loon, with broad seat-beds, capacious lockers and a buffet, and a folding table for meal-time use. Aft is the bathroom, more wardrobes, and the owner’s state- room, with two wide beds. NICKEL AND HYDROGEN TURN WHALE OIL INTO TALLOW It has been discovered in England that whale oil may be converted into a sub- stance resembling mutton tallow in ap- pearance, taste, and smell, by forcing it to take up an additional portion of hy- drogen. The conversion is accomplished The Lounges of the Saloon Provide Bed Room for Three an agent in assisting the absorption proc- ess. Whale oil, like all other oils, is a compound of hydrogen and carbon, and increasing the hydrogen’ constituent chemically alters it to a firm, fatty mate- rial suitable for making oleomargarine. ROAD IS PAVED ON ONE SIDE AND DIRT ON THE OTHER There are still some kinds of traffic to which the. old, soft dirt road is best suited, notably unshod horses and spike- wheeled farm machines. To accommo- date these as well as rubber-tired vehicles,

y CONCRETE OR BRICK eee edaeeeee ee

Cross Section Showin New Road Construction, Soft Dirt at the Left, and oncrete or Brick at the Right the state of Kansas is experimenting with a combination road. For five miles out of Abilene, the new highway is dirt for 10 ft

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918 POPULAR of its 32-ft. width, concrete or brick for 18 ft., and then dirt again for the remaining 4 ft. This method of paving promises to be both economical and long-lived. As the advantages of the dirt roadway for machinery and horses are obvious, it will not be necessary to enforce restrictive measures for traffic. FAN CLUTCH TO GIVE DRIVER BETTER CONTROL OF MOTOR [In the course of the automobile engine’s progressive refinement, reason has been found for the alteration of almost every r GUIDE PIN FOR SLIDING {HALF OF CLUTCH 1 SLIDING HALF (OF CLUTCH PULLEY | | a DRIVING HALF “ia, OF CLUTCH \\ LUBRICATING SYSTEM SHIFTING COLLAR | The Clutch is Shown Above in Cross Section. From the Dash the Shifting Collar is ,Moved Back and Forth by Means of the Wire at the Bottom detail but the driving of the fan. But now it is believed in some quarters that standard practice is at fault even here; there has been designed, in consequence, a little clutch, which fits between belt pulley and fan, and is operated from the dash by a flexible cable. It is thought that this control of the fan will give the motorist convenient control of water temperature, especially in winter. In very wet weather the fan would be thrown out to avoid sucking rain through the radiator and over the electrical equip- ment. SCHOOL CHILDREN SEE SCREEN VERSION OF ENGLISH GRAMMAR In .three local motion-picture theaters the school children of Minneapolis, Minn., recently saw enacted the story of Mr. English Grammar. They found how Mr. Verb, little Miss Pronoun, and all the rest of them, were related. They sympathized MECHANICS with “Fine,” “Wonderful,” and other Ad- jectives who were so overworked that they fell down in exhaustion. They learned, too, why “Swell,” “Grand,” “Gee,” and other outlaws are not allowed to live in respectable Grammar Row. In this entertaining way they got an under- standing of grammatical principles that many of them would not have gained through months of book study. The film was made in Minneapolis some time ago with the help of school children, played most of the parts. who EXPERIMENTS DETERMINE BEST INCLINATION FOR LADDER A series of experiments have now de- termined the proper angle at which to place a ladder against a wall. The great- est safety, it is found, is attained at about 75°, In this position, the uprights are least strained by weight upon them, and the base of the ladder has least tendency to slip out, while the feet of the work- man ‘are not cramped when he approaches the top. For the ladder to lean at this angle, it .is necessary simply to plant base approximately one-quarter of ladder’s length from the wall. PLURAL LIGHTNING ARRESTER SAVES TELEPHONE TROUBLE Trouble with grounded telephone lines caused by lightning discharges disit tegrating the carbon arresters commonly used, is avoided by a new form of arrester with eight sets of carbons, making it re- newable seven times. The little blocks of carbon are mounted on a disk, and pro- vided -with switch points and a pivoted contact arm. If the subscriber fails to discover the grounded condition himself, ¢ the the Front View, Left, and Rear View, Right, of Multiple Lightning Arrester for Rural Telephone Lines. Turning the Arm Puts a New Arrester in Circuit and remove it by turning the arm to the next position, the wire chief at the .ex- change can locate it by test and notify him, saving a trip.

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POPULAR MECHANICS LUMBERMAN DONS DIVING SUIT FOR WORK BENEATH LAKE ICE The work of recovering hardwood logs from the bottom of a small lake in north- ern Ontario was not interrupted by the coming of winter, and the freezing of the surface. The contractor in charge pur- chased a diving suit. Clad in this, and using a 20-ft. ladder, he descended daily through holes cut in the thick ice to the lake bottom. Here he located his log, attached to it a pair of tongs on a chain end, and gave the signal to hoist away. [he work continued steadily through the winter, no delay being caused by the cold- est weather. SINGLE HOSE CONNECTION IS FEATURE OF NEW MILKER A new milking machine, representing an effort to attain greatest efficiency with the fewest parts possible, is now interest- ing progressive dairymen. Sim- plicity, with its at- tendant virtues of cleanliness and convenience, is obtained chiefly by the use of but one tube from teat cups to pail. Most _ machines use two or three. The pulsator, the ingenuity of whieh makes this simplification possible, is located in the branch connection, under the udder, this position making the teat cups more quick- ly responsive. The pulsator can be easily removed, disassembled, and cleaned. The familiar alternate action is used; that is, suction is applied alternately to the front and hind teats. AUTOMATIC WATER FILLER FOR STORAGE BATTERIES The motorist may now save himself the occasional annoyance of finding his stor- age batteries dry, by equipping them with an automatic water filler. The reservoir for the distilled water is an aluminum container which is screwed to the dash beneath the hood. From the container a rubber tube, incased in metal, runs to special vent caps on the battery tops. These caps are of ingenious construction. Unscrewed from the battery top, each is 919 seen to be pierced by a vertical water passage, beneath which is held a cork float. When the water level in the bat- | CONTAINER CAP ————- ALUMINUM WATER CONTAINER PROTECTED TUBE TO One of the Special Caps is Seen in Cross Section at the Lower* Left. Above and to the Right is Pictured the Complete Filler Outfit tery is low, the float drops away from the passage mouth, and permits the flow of water from the container; when the level rises, the float is pressed against the passage mouth, and the flow is stopped. “ELABORATE CLOTHING RACK FOLDABLE FOR TRAVELING A patented coat, trousers, and hat rack of unusual elaborateness is now being manufactured. It consists of a sin- gle wooden up- right, 6 ft. 4 in. high, which is held erect by four hinged legs. At the top of the up- right is a hemi- spherical, cloth- covered hat rest. At four interme- diate points on the upright are screwed slotted fixtures, which hold the arms of | J | two coat forms | and two pairs of trouser supports. These arms may be folded back, and the upright doubled up, for convenience in traveling. a (\) a on @ Builders of model airplanes will be in- terested in the construction outfits sup- plied by a _ technical-equipment house. Each outfit comprises all tools, lumber, mechanical parts, wing silk, and blue- prints necessary for the making of a large- size flying model.

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CHILDREN’S PICTURE-STORY DEPARTMENT Members of the Boys’ and Girls’ Calf Club of Morgan County, Ohio, Receiv- ing 20 Pure-®Bred Heifers, Which They are to Take Care of for One Year, and Then Exhibit for Prizes and Sell — A Pure-Bred Hereford Cow of Dodge County, Nebraska, and Her Triplet Calves: Twin Calves Are Common Enough, but Triplets That Live and Thrive, as These are Doing, Are Very Rare NX re Remark. ably ‘“Handy’’ with Their Trunks, and This One Used a Snow Shovel Quite Skillfully When the Circus It Be- longs to was Snowed in at Bridgeport, Con- necticut When the Circus had been Shoveled Out, Some of the Elephants Cleaned the City Streets with Plows, Incidentally Giving a Number of Children po —— an Unusual Ride Sere ok.

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OF MODERN ACTIVITIES AND INTERESTS Children of Seattle Listening to a Street Lecture on the Dangers of Matches, Delivered by a Fire Captain. He Is the Official Fire- Prevention Missionary to 40,000 Youngsters, Whom He has Made ‘Home Fire Chiefs’’ Redondo Beach, California, Has ‘ less Amateur Train- a Tame Pelican Known as “Old ing to Receive the In- Bill,” Who Broke His Beak and Had struction Messages Now to Depend on Friendly Fishermen Sent Out to a Radius of for His Food. They Mended Him | 75 Miles by United States with Bamboo, but He Still Likes | => ~| Naval Communication His Fish Brought to Him f Service Stations Boy Scouts of San Francisco Codperate Regularly with the Fire Department, Especially in First-Aid Work, and have Learned to Use the Pulmotor j, | ——_ 921

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922 POPULAR ALL-METAL FLEXIBLE LADDER OF NOVEL CONSTRUCTION Steel cables serve as side. members in a new all-metal flexible ladder, which can be used for many purposes, according to the A Front View of the Flexible Ladder is Seen at the Left. The Side View at the Right Shows the Lugs That Hold the Rungs Away from the Wall manufacturers. The rungs are short lengths of pipe, attached with castings, on which there are projections for holding the latter away from a_ perpendicu- lar or sloping surface ‘to provide space for the hands and feet of a person ascend- ing or descending the ladder. Being fireproof, it can be employed as an emer- gency fire escape. It is also designed to be used by painters. CRANE-SIGNAL CODE ADOPTED BY RECLAMATION SERVICE Derrick and locomotive-crane opera- tors employed by the United States Rec- lamation Service, and their assistants, are required to use a recently adopted TRAVEL These Signals have been Adopted by the United States Reclamation Service for the Use of Crane Operators and Their Assistants MECHANICS hand-signaling system in their work. The code includes nine signals, eight of which can be made with the right arm. One requires both arms. Private em- ployers have been urged to adopt the system. DASH ATTACHMENT COMBINES SEVEN INSTRUMENT DIALS Scattered dash-instrument faces have a tendency to confuse the automobile driver, and besides are somewhat untidy in appearance. Both of these objection- able features are eliminated by a new ac- cessory, which includes seven dials, com- pactly arranged under a single elliptical glass, about 6% in. wide and 10 in. long. The instruments back of the dials are a combined odometer and speedometer, the former designed to indicate trip and season mileage; gasoline and oil-pressure gauges; an ammeter, and a clock. The Clock, Oil and Gasoline Gauges, Ammeter, Speed- ometer, and Trip and Season Odometer Included in a Single Auto Dial instruments are attached in such a way that any one or several of them can be removed without disturbing the others. TRADE-MARK REFORM IS OBJECT OF NEW BRITISH LAWS Two evils, one the pirating of foreign trade-marks now practiced in many coun- tries, and the other the perversion of trade-marks into monopolies on _ trade names, are attacked by new laws which have just gone into effect in Great Britain. Trade-marks which do not fall within the provisions of the old act, but are protected by common law, are now given special registration, which then be- comes prima-facie evidence of the regis- trant’s ownership. This is expected to simplify foreign registration where the applicant is required to prove registra- tion in the country of origin. The new law also makes clear the fact that the name of an article does not constitute material for a trade-mark.

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i A oe Mt i iH ot dh lice _- a as to where to obtain any specified materials or parts for making objects described in the following pages may be had, on request, ‘4 from our Bureau of Information. —Editor. Wood Bending and Forming By F. D. ]\ many lines of woodwork, such as the building of boats or canoes, it is ecessary to use wood which is bent to pe. This is done by steaming the wood, or soaking it in boiling water, to nder it more pliable. Steaming is the tter process, and methods of applying t to long pieces of wood will be de- bed in this article. (he bending of a piece of wood con- ts actually in stretching one side of it d compressing the opposite side. This llustrated in Fig. 1. When a straight is bent to form a circular ring, the ner diameter of this ring will be less than the outer diameter, the inner surface having been compressed and the outer io stretched. If compression the wood is green, it usu- ally bends vithout difficulty, and if it is held to hape while being dried out, the shape ill be permanent. When, however, the ood is’ well dried outy and it is to be ent, it must be restored to a condition imilar to that of green wood. It is this effect which is accomplished by steam or boiling water. The necessary materials for building a box for steaming long pieces can often e found around the home or shop. Such a box is shown in Fig. 2. Four boards of suitable length and width are nailed together to form a long box, and one end is permanently closed. An old var- nish can is fitted to the lower side of the box, as illustrated. The box is set on horses, and a hole is drilled in the bottom, just large enough to fit the neck of the varnish can tightly. The can may be held firmly to the box by wire supports. Water is placed in the varnish can, and a gas burner, an oilstove, or a blowtorch, furnishes the heat which converts it into steam. The wood to be steamed is placed wel | , AS Lf Fig.l: PRINCIPLE OF BENDING BURKE in the box, and the open end is closed by stuffing a piece of burlap into it. The joint must not, of course, be steam-tight, STEAM BOX 6 OR BFT.LONG THIS END OF BOX 3S 9 (Ee. JS CAN s fia. é: sTeats BOX The Wood is Placed in a Steam Box, Which is Supplied with Steam from a Tin Can below It, Heated by an Oil Burner or Blowtorch but it must be tight enough so that steam or air will escape from it very slowly. The time required for thoroughly steam- ing a piece of wood depends not only on its size, but on its kind and condition. When the wood is thoroughly steamed, the next problem is to hold it to shape until it is dry. Small light pieces can PIECE BEING BENT Fic.3:8€NDING FORM When Heavy Pieces are being Bent, It Is Advisable to Construct a Form, Which may Hold Several Pieces to Shape at the Same Time 923

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924 often be held merely by driving nails into a heavy board in such position as to hold the steamed piece to the proper shape when it is placed between them. In the case of heavier boards, it is necessary to resort to specially built forms, such as the one illustrated in Fig. 3. Whatever type of form is used, the wood should be allowed to remain on it for two or three days, if the best results are to be obtained. POPULAR MECHANICS It will be found that the steaming has a tendency to open up the pores of the wood, causing it to gain or lose moistur: rapidly, according to the humidity of th surrounding atmosphere. These rapid changes will cause cracking or distortion if not guarded against. It is therefore advisable to protect the wood, by var- nishing or painting, immediately after its removal from the bending forms. Wheelbarrow from Hot-Water Tank An efficient means for the transporta- tion of refuse, ashes, and other bulk ma- terials from one place to another. car PIPE CLAMPS a ~ An Old Water Tank, Cut in Half, Makes an Effi- cient Barrow for the Transportation of Ashes, Sand, and Other Bulky Materials ; PIPE SPACER oor \. 3” B0uT WASHER easily be made from an old water tank. The tank is cut in half with a cold chisel, or with an oxyacetylene torch. The wheel turns on a long bolt, which passes through the tees at the outer end of the barrow, as shown in the detail drawing. The pipe frame is attached to the boiler with ordinary pipe clamps. The rests are made from ordinary flat-bar stock, and bolted to the handles and frame as indi- cated in the side view.—P. P. Avery, Gar- field, N. J. 4 en Making Oval or Flat Coil Springs The making of an oval or flat spring is a job which may prove troublesome, from the fact that such a spring, wound on a flat mandrel without proper precaution, will be difficult to remove from the man- drel. This can be obviated by first wind- ing the mandrel with paper, then winding the spring over the paper, and afterward heating the mandrel and spring suffi- ciently to char the paper. To avoid over- heating, melt onto the spring and paper some tallow or beeswax, and heat the mandrel till the tallow is just burned off. Before and after heating, hammer gently the flat side of the spring, on the mandrel. After hammering the second time, it is well to apply heat again, with some mor: tallow to prevent overheating. If the heat applied is not excessive, it will be found that the quality of the spring is im proved by it, as certain internal strains in the metal are removed. The main benefit, however, is the ease with which the spring is removed from the mandrel after the paper has been com- pletely burned away.—James H. Beebee, Rochester, N. Y. A Round File That will Not Stick In using a round file to enlarge a hole drilled in metal, there is always an annoy- ing tendency of the file to stick. Besides being troublesome to pull out, the file may under such circumstances dis- tort the hole. Where much of this work has to be done, it is a good thing to pro- vide files with various portions smoothed down, like the one in the cut. Such a file is adapted for enlarging a hole to a diameter slightly greater than that at the point marked “diameter” on the drawing The smooth portion provides a clearance space, to prevent the file from getting caught. -- THIS NICK CAN BE GROUND AT ANY DESIRED POSITION ROUND FILE Lawn Laid like Carpet A lawn can be grown and trimmed to any desired shape or design, somewhat after the fashion in which one lays a car- pet. Grass seed is sowr. on thick canvas or burlap bagging, although any other cheap material will answer. This is kept moistened, and is speedily covered with a mass of verdure. The location for the lawn is carefully prepared, giving special attention to getting the surface level and

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POPULAR well fertilized. Then the grass mats are laid down in sections, with their edges touching, and lightly rolled to insure con- tact with the earth. The mats are kept well moistened for several days, until the roots penetrate through the fabric into the soil, which they readily do. Eventual- ly the fabric disintegrates and the lawn becomes a permanent feature.—S. Leon- ard Bastin, Bournemouth, Eng. Lock for Pulley Pin When a pulley of the type shown is provided with a pin for keying it to the shaft, and holes through the rim for driving out the pin are necessary, it is pos- sible, by the method illustrated, to provide against danger of the pin working out. A long pin is used, and a piece of clock spring is formed to fit inside the rim. Two small lugs are soldered to he clock spring, so as to fit into the holes n the rim. The pin cannot then work out, no matter how loose it is, until the spring is removed. \ PULLEY + t l Bit for Boring Large Holes An accessory merchant, making a spe- cialty of installing various new devices, made the brace bit illustrated for boring out different-size circular holes in the dash or cowl of automobiles to take clocks, speedometers, oil gauges, primers, and the like. The tool consisted of a square rod, with the end fashioned to fit into the brace. The point end was ground round. A piece of flat saw steel was fashioned as >» / BLONGATED SLOT y? _-—— CLAMP SCREW { POINT END SAW STEE A Tool Made from a Few Scraps of Steel is Useful for Fitting Instruments to the Dashboard “CUTTING EDGE (River L SQUARE ROD shown, with a pivot hole, an elongated slot, and a cutting edge. Holes of any diameter within the range of the tool are cut in either wood or light sheet metal. —G. A. Luers, Washington, D. C. MECHANICS Filter Clarifies Ditch Water In irrigated sections, many farmers use water from the ditches for household pur- poses. This water, however, is usually WATER LEVEL . / \RRIGATION AR % OITCH ; ee ie SAND \ \ FINE GRAVEL GRAVEL STONE Muddy Water, from the Irrigation Ditch, Percolates through Sand and Gravel Filter Layers into the Well, from Which Itis Drawn, Clear and Cool more or less muddy, but with a simple filter, such as the one described, it may be satisfactorily clarified. At right angles to the irrigation ditch, and connected with it, another ditch, from 4 to 10 ft. in length is dug. It is made a little deeper than the ditch carrying the water, and at the end, a large-sized joint of vitrified tile is set. Coarse gravel is tamped around the tile, and a layer placed in the bottom; a layer of finer gravel is put on this. A séction of the short lateral ditch is packed with coarse sand. This is faced with a layer of gravel, and lastly, with large stones at the water’s edge. In operation, the water percolates through the sand and gravel, rising in the tile, from which it may be dipped or pumped. Most of the impurities will be removed by the process and the water will be clear and cool. A concrete curb, or even a barrel, may ve substituted for the joint of tile. Fiber for Hammer Handles A very substantial hammer handle can be made from common black or red fiber, which is often found in the scrap heap around electrical plants. Fiber handles never split and seldom warp, if a well- seasoned piece is used. It is also found that the elasticity of the material is such as to minimize the sting which is felt when a blow is struck not exactly square. For riveting hammers the fiber handle is ideal; it is not well adapted for heavy hammers. For the ordinary small rivet- ing hammer, a piece of fiber 1 by 1% by 11 in. forms good raw material. It is roughed out on an emery wheel and fin- ished with a file—Harry B. Stillman, Plainville, Conn.

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926 A Modern Back-Yard Swimming Pool Including the fence and a small bath- house, the 36 by 13-ft. reinforced-concrete swimming pool, shown in the photo- Including the Fence and a Small Bathhouse This Modern Reinforced- Concrete Swimming Pool was Built for Less than $500 graph, was built at a cost of less than $500. The tank is from 3 to 6 ft. deep and holds 12,000 gal. of water, 24 hours POPULAR MECHANICS being required for filling with an ordinary garden hose. A “scum trough” around the edges of the pool slopes toward on: end, where any overflow is carried off }y the sewer. This trough also serves as a handhold for the bathers, and as _ one can never be more than 6% ft. from the edge, the possibility of acci- dents is greatly reduced. Fresh water is run into the tank each day to make up for what is lost. The tank is com- pletely drained every three weeks, by open- ing the 4-in. drain pro- vided at the lowest point; the bottom is then scrubbed, the in- side walls given a thin coating of whitewash, and the tank is refilled. On alternate days about 1% Ib. of chloride of lime is mixed into the tank for the purpose of sterilizing the water. Hiding the Fireplace in Summer During the summer months, when there is no need for a fire, an empty fireplace is apt to be an eye- sore. To do away with this un- sightliness, one architect equip- ped the opening with doors. These were made of heavy = wood, cov- ered, on the side exposed to the fire in winter, with sheet asbestos, which was fastened on by means of brass-head tacks. Both sides of the doors were given a coat of fire-resistant paint, or lacquer. In sum- mer the doors are closed, shutting in the fireplace completely, so that it resembles a cupboard set in the wall.—R. T. Town- send, New York, N. Y. Maul Made from Auto Piston The piston from an old automobile en- gine may be easily converted into a maul for driving stakes and similar purposes. The wristpin is removed, and a handle inserted in the pin holes. The piston is filled with a concrete mixture composed of 3 parts cement and 1 part sand, which should be allowed to set for several days. If available, melted lead may be used for filling the piston, and the delay of wait- ing for the cement to set will be avoided. —Chas. H. Peterson, Fulton, Wyo. Container for Brazing Flux In brazing joints, work which is rough and full of blowholes is often caused by the presence of moisture in the brazing flux. The flux, which con- sists mainly of borax, absorbs moisture very readily when ex- posed to the air; it is possible to keep it dry by using the con- tainer shown in the cut. The cover has a wire basket at- tached to fit inside the vessel. The basket is filled with unslaked lime, calcium chloride, or other material which absorbs water more readily than the borax. With this cover on, any water which is present in the air of the container or the borax will be absorbed by the more absorbent substance, thus keeping the borax itself dry. If it is found that any great amount of moisture is absorbed by the drying COVER FOR COVER FOR CONTAINER CONTAINER

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POPULAR MECHANICS agent, a pan may be placed on the bottom of the basket to keep water from falling into the borax. Boring and Calipering Segments It frequently happens that a mechanic is confronted with the problem of boring, in the lathe, a segment of a circle which is less than 180°. As a means of caliper- ing the work for close limits, it is pos- sible to clamp a piece of scrap on the op- posite side of the faceplate, but this method is unsatisfactory, because it is often necessary to place a counterbalance in that position. Another way is to place an arbor between the centers, and caliper from its largest diameter to the arc being bored. This distance, plus half the diameter of the arbor, will be the radius of the are.—Geo. Lewis, Boston, Mass. Old Watch as Speed Counter Desiring to count the revolutions of a shaft, and not having a speed indicator handy, I struck upon the following idea, which answered very nicely. Having on hand an old dollar watch, which was minus the minute hand, I fitted a piece, as shown in the sketch, over the. winding knob of the watch. This piece is drilled slightly smaller than the knob, and is slotted with a hacksaw, so as to make a tight fit over the knob. The other end is filed so as to present three sharp edges, which take hold in the center hole of the shaft. With the piece pushed over the winding knob, the point is placed in the shaft center. By pushing the watch against the shaft, the gears which revolve the hands are brought into mesh, and the number of revolutions of the hour hand are counted. The second hand on some watches can be used to show how much time elapsed. On the watch used by the writer, it required six revolutions of the winding knob to make a complete revo- lution of the hour hand. The number of revolutions per minute of the hour hand, multiplied by six, thus gave the number of revolutions of the shaft. Al- though not adaptable to very high speeds, this method answers very well on speeds up to 1,000 revolutions per minute—R. H. Kasper, Philadelphia, Pa. 927 How to Make Brass Tubing Smaller Several brass bushings were required, to be afterward reamed out to 1 in. diam- fRON PIPE Brass Tubing, was Reduced to the Necessar Diameter wit a Die and a Bench Vise eter. Brass tubing with %e2-in. wall was to be used, but the only stock obtainable had an inside diameter of 1.007 in. Soa large cast-iron washer, about % in. thick, was bored out, and one side flared enough to admit the bushings. Then the brass tubing, cut to length, was squeezed through-the cast-iron die in a large vise, using a piece of pipe as a distance piece, and was reduced in inside diameter to 0.997 in., allowing .003 in. to be removed with a l-in. hand reamer. The bushings were lubricated while being pressed through the die—H. H. Parker, Oakland, California. Shovel Harvests Cabbage A cabbage harvester that will do away with a great deal of stooping and bend- ing is made , from an _ or- dinary _ steel shovel, as shown in the drawing. A triangu- lar piece is cut from the center of the shovel, and the edges are sharp- ened. The cutting edges are pushed against the stalk, and a slight pressure severs the head. The cabbages may be cut and tossed directly into the wagon. Equipped with such a tool, one man is able to in- crease greatly the amount of work and to perform it with less fatigue than by the ordinary method.—Violet Johnson, Rockford, Ill. SHARP CUTTING EDGE

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928 Removing Carbon with Wire Brush The ordinary carbon scraper is a more or less unsatisfactory tool, especially where the only access to the piston and 12" SECTION OF 5” STEEL CABLE STEEL PRONGS BRUSH PISTON HEAD AND FIRING CHAMBER a Wy -=_ (IN ero iB Hh oe ‘ef A Carbon Remover Which Has a -. Direct and Positive Action is Made from Strande Steel Cable cylinders is through the spark-plug hole. A special tool for the purpose consists of some stranded-wire cable and a piece of brass tubing. One end of the tube is bent slightly, as indicated in the sketch, the wire cable is placed through the pipe, and the end frayed or untwisted. The opposite end of the cable is taped and wound with twine, to afford a convenient handle. The tool is used as illustrated; gripping the pipe with the left hand, the right hand is used to move the cable back and forth in pump fashion. The projecting prongs scour the piston head and cylinder walls. After the carbon is pulverized, the mo- tor is run for a few minutes with the spark plug left out, when the suction and ‘compression of the piston blows most of the loose carbon out of the exhaust port and the plug opening. A piece of steel- wire cable should be used in making this tool; soft-iron wire is not stiff enough to be effective. Electric Tire-Theft Protector The automobile driver who has just ex- perienced the loss of a spare tire by theft may be interested in the possibility of an alarm*to sound a warning whenever the spare tire is detached by an unauthorized person. Such an alarm can easily be rigged up by building a small contact spring onto the tire holder, in such a way that when the tire is in position, the POPULAR MECHANICS spring is held out of contact, but when the tire is removed, the contact isclosed. The device should be connected in parallel with the horn button, so that when both the switch and contact are closed, current will be supplied to the horn, which will thus blow continuously. The switch should, of course, be placed in some con- cealed position, and the contacts should be installed in such a way that they will not be conspicuous.—C. S. Cierpik, Chi- cago, Ill. a Rotating-Disk Reamer A drill or reamer, which was found use- ful for rough-boring cored holes, was made from a piece of shafting, slotted across its end. Two hardened steel disks were inserted so as to revolve freely on a pin which passes through their centers. These disks are ground to a bevel all around, and are inserted so that the sharp edges are away from each other. The drill is used in the same manner as a twist drill, though it cannot be used to start a hole, but only for enlarging. It is found to stand up better than a twist drill on scaly cast iron, as the cutting is done by longer edges. A hole produced by such a drill will be almost as smooth as that left by a reamer, though it will not, of course, be as straight. SHAFTING y Z Z Z Z A Z 4 Ow Eccentric Wrench for Stud Removal The wrench illustrated will remove studs of various diameters in the mini- mum of time. It is simple to construct, A Reversible Wrench, Which "rie by Means of an Eccentric, Is Effective in Handling Studs consisting mainly of a steel circular-ended handle. This is drilled to accommodate the largest size of stud which it is de- sired to remove. A hole is also drilled for the insertion of a pivot pin, for an eccentric clamp.

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The clamp roller is of steel, knurled and hardened, and is fitted to revolve freely in a sawed slot. The eccentric clamp permits either the insertion or re- moval of the studs, as is desired. In work on gas and steam-engine cylinder heads, a wrench of this type saves con- siderable time; also for turning pipe and rods, this tool can be used to advantage. Vacuum Lamp for Acetylene Work It is well known that when working with explosive gases, as is necessary in acetylene welding, an open light must never be used. Not only is it advisable to use an electric lamp, but it should be well protected. It has been found, more- over, that it is a distinct advantage to use a vacuum bulb rather than one of the modern gas-filled type, because in case of the breakage of the bulb, the filament of the vacuum lamp will be consumed in- stantly. In the gas-filled lamp on the other hand, the filament may retain its incandescence long enough, after the breakage of the glass, to ignite an explo- sive gas. Windmill Sign Made from Bicycle This windmill sign was constructed for a bicycle shop, but it could be used to ' attract attention 1 ] in many lines of trade, as it is the moving object that always catches the eye. The material can be obtained for a few dollars, as a “wheel” that has outlived its use- fulness will sell for very little, and the other parts of the sign are two short pieces of lumber, 2 by 4 in. and 4 by 4 in. Blades, which cause the wheels to revolve, are cut out of tin and fastened firmly to the spokes and the rims at a slight angle, to catch the wind. The windmill is made to face the wind by a blade, shaped like the feather end of an arrow, which may be cut from thin wood or sheet metal. The upright timber must be solidly set on the roof, and well braced; the crosspiece that carries the bicycle is pivoted to this by a large bolt so that the device will turn easily in a light breeze. Such a sign can be made in spare hours, and will show up effectively against the sky. POPULAR MECHANICS Agitator for Mixing Liquids A bacteriologist in a western agricul- tural college, confronted by the neces- sity of having a solution in 600 flasks agitated for two hours, constructed the ma chine illustrated to do the work, thus saving a vast amount of labor for his laboratory staff. Ordinary horizontal shaking would not do, because it al- lowed the heavier constituents of the solution to go to the bottom of the flask and A Machine Built by a Bacteriologist Agitates a Solu- tion with a Motion Approximating That of the Hand in Shaking It remain there, the lighter elements sim- ply washing back and forth over them; the downward thrust such as is given to a bottle shaken by hand, as well as the horizontal motion, had to be imitated. This was accomplished by setting two of the hinged legs nearer the center, as shown in the cut. Varying thrusts of the connecting rod were obtained by bor- ing holes in the driving wheel at differ- ent distances from the center. Cone pul- leys gave variable speeds. A small elec- tric motor furnished the power. Wrapped in a towel, a flask was placed in the rocking box as shown in the cut, the switch was turned, and the machine did the rest, agitating the contents of the flask just as effectively as by hand. @A restaurant owner, annoyed by the supply of drinking water in his cooler giving out during a rush, placed in his cooler a float valve, which automatically refilled the tank whenever the water got below a certain predetermined level.

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A Stereotyping Outfit for the Small Newspaper Shop By H. W. HE allurement of molten linotype metal has caused many printers in country-newspaper shops to experiment with stereotyping. Few who have been in the game eight or ten years have not tried it. Some results have been good, considering the crudity of means avail- able. The first essential is a casting box. In case of necessity, it may be made from two old mounted electrotypes, three strips of wood, and two to four clamps. This is not an outfit that will stand con- tinued service, because of the warping of the wood, necessitating frequent re- placing of parts. If metal parts are substituted, the difficulty is overcome. With this in view, two flat cast-iron plates, as illustrated in Fig. 1, may be picked from the scrap pile of the local junk dealer. A convenient size for the making of small castings is 8 in. by 15 in.; this size will accommodate a _ three- column, 10-in. casting. It is sometimes possible to make a heading six or seven columns wide, in a box of this size, by casting in two parts and carefully joining the ends. The cast-iron plates should be at least % in. thick. Each should be fin- ished smooth on one side, and polished. Attach a handle to the upper plate, con- sisting of an iron rod welded to it, and covered with a wooden jacket. Bevel a wide slot in one end of the same plate, this to be the “pouring” end. The casting box is completed by the three metal strips, shown in Fig. 2, which *Fie.l: CAST-IRON PLATES TOP PLATE METAL STRIPS — SMITH will hold the plates apart and give thick- ness to the casting. At this stage it must be decided whether the castings are to be type-high or thin, in the latter case ne- cessitating wooden mountings. The thin plate is more easily trimmed, and more- over it “ties up” less linotype metal, but it is more difficult to cast. The metal is more likely to chill while being poured, because the volume is small and the con- tact surfaces are close together. With such an outfit as this, therefore, it is better to make the castings type-high. For this purpose, procure three strips of scrap iron. Dress and polish them to a width of about % in. and a depth of .917 in., or .001 in. less than type- height. Weld the short strip to one of the long ones, at an angle of 90°, thus making two strip units. A stand or base for the casting box may be made from a stout wooden box, sawing through the box at an oblique angle, indicated in Fig. 3. Remove the sides; nail a board to the sawed ends, and brace well inside. Nail a wooden cleat across the top surface near the sawed end. Lay the lower casting plate on the top surface, with one end resting against the cleat. Procure four stout C-clamps from a hardware store; for a casting box of this size only two will be needed at a time, but it is well to have two in reserve. The stereotype, as is well known, is a casting made by pouring type metal into a paper mold, which is known as a matrix IRON PLATES )~ METAL STRIPS | Fic.3; ARRANGEMENT OF MATS Fia.4: CLAMPED FOR POURING Fie.5: POURING The Owner of a Small Print Shop Need Not Be without Means for Making Stereotypes from the ‘Mats” Which Many National Advertisers Furnish to Their Local Representatives 930

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POPULAR MECHANICS or “mat.” The process is used on news- papers of large circulation, all the print- ing being done from stereotype plates, rather than from actual type. The pur- pose for which the outfit here described is intended, consists rather in the making of small stereotypes from mats that are commonly supplied by national ad- vertisers to their local representatives. The print shop which is equipped with the stereotyping apparatus here _illus- trated, will be able to make use of these advertising mats, thus getting advertis- ing business that might otherwise have to be refused on account of inability to make the necessary stereotypes. Cut from the sheet the desired portion of the matrix or mat, taking care to divide equally the flat depressed space surround- ing the image. Cut out a piece of thin, stiff paper, having the same width as the mat to be cast. Paste it to the mat, lapping over as shown in Fig. 3. See that the paste is thoroughly dry, and then lay this mat unit on the lower plate; the paper is to serve as a pouring flap. Place the two metal strips on the depressed edges of the mat, taking care that the strips are in proper alinement with the lines of the mat image, and also that the strips do not cover any lines to be cast. See that the ends of the metal-strip units join closely, to prevent leakage of metal. Lay the upper plate on the strips, and clamp the casting box together, as in Fig. 4. Tip the mounting box over on the oblique end, carefully skim the metal, and ladle it quickly, as illustrated in Fig. 5, into the open end. Good results can 931 also be obtained by using a piece of old mat lapped over the good one instead of thin paper, except that the pressman is then more likely to have to correct un- even thickness of the casting, by pasting paper to the back of it. After two or three minutes the metal will have “set;” then remove the clamps, the top plate, and the two metal strips. To insure success with the first cast, the casting box should be heated. This may be done by leaving out the mat and filling the box with molten metal. The mat should also be warmed in advance, to prevent blisters on its surface. If an inside mortise is desired, saw an old wooden electrotype mounting to the required shape, and lay it on the surface of the mat in the proper place. Fasten with two brads, inserted from the back of the mat. After such a casting has been made, care should be exercised in loosening the mat from the wood, which is-now gripped solidly by the metal. The wood may be removed with a chisel. The most laborious part of the process —unless the shop is equipped with that very useful machine, the saw trimmer— is sawing and trimming the castings. A vise and a carpenter’s handsaw will an- swer that purpose, as linotype metal will not dull a wood saw as quickly as one would expect. A coarse flat file or rasp will smooth the edges. It is not easy to trim the plates square unless a “shoot board,” or squaring plane for wood or soft metal is provided. This may be bought from a photoengraving supply shop for $50, or thereabout. Cooling Tank for Water Systems The occupants of a western farmhouse, finding the supply of drinking water in the summer unpleasantly warm, sought a remedy for the inconvenience. The water came from an elevated supply tank, which became heated quite easily by the sun’s rays. The length of underground pipe line between the tank and the house was not sufficient to cool the water, so an old hot-water boiler was procured, and was laid in a pit at the lowest point of the pipe line. The pipe was connected so as to lead through this tank, and the ar- rangement had the desired result of keep- ing the drinking-water supply cool. @Before putting the razor away draw the blade across the hair several times. The oil in the hair leaves a film on the razor and prevents its becoming rusty. { Valve Grinder Made from Auger An old auger bit of the proper size is readily made into a valve-grinding tool which will fit into any ordinary bit brace. 7 SIT STOCK The bit can be sawed through at about the point indicated by the dotted line in the drawing, being first annealed for easy cut- ting. The remaining stub of the bit is filed out, so that the legs at the two opposite sides fit the holes in the valve. In a garage where various kinds of valves are encoun- tered, it is convenient to have several tools of this type made in assorted sizes. tg ~~ LEGS FIT VALVE HOLES

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POPULAR Scuffle Hoe Made from Saw It is the scuffle hoe that gets the weeds below the ground. Such a hoe is easily A short section of a worn-out made. A Scuffle Hoe, for Getting at the Weeds under the Surface, is Made from a Piece of Saw Steel crosscut saw, a piece of heavy band iron, and a discarded broom handle, together with a few stove bolts of proper size, are all the parts required. The section of the saw should be about 6 in. long, and the piece of band iron about 18 in., of which a foot is to be bolted onto the handle, while the remaining 6 in. is to be bent at an acute angle, so that when the saw section is bolted onto the band iron, it will tend to work into the soil, or “scuffle” when the hoe is drawn toward the worker. All necessary holes should be drilled be- fore attempting to assemble the hoe, but the band iron can be bent after the hoe has been put together, and thus the best working angle can be found by actual trial. Keeping several sections on hand, sharpened ready for use, is a great con- venience. Such a tool can be made either to be drawn toward the worker or pushed away from him, as seems easiest for the individ- ual worker. This is done simply by bend- ing the band iron either more or less than a right angle. Setting the saw section at an acute angle to the width of the iron gives the hoe more of a cutting action in its work on the roots of the weeds.— C. L. Meller, Fargo, N. D. Quick Method of Curing Hams A quick method of curing hams for home consumption consists in burying them in hot salt for 10 to 15 minutes. The hams are first covered with sirup, so as to give them a sweet flavor. An iron kettle is about half filled with salt and then heated until the salt is hot enough MECHANICS to snap. The salt should be continually stirred to prevent its scorching. A small ham or shoulder will be done in 10 min- utes, a large one in 15 to 20 minutes. After taking the hams from the salt, they should be placed in a cool, dry place for a few days, when they are ready for con- sumption. The action of the hot salt on the juices of the meat makes a solution that is strong enough to check bacterial develop- ment. The hot-salting method has the advantage that it can be used in mild weather when there is danger of meat spoiling with the usual method.—C, T, Conklin, Columbus, Ohio. Hand Horn Operated by Foot A hand horn for automobile or truck is easily op- erated by the heel of the foot, if set on an angle iron under the floor board, as shown in section in the drawing. Clamp for Drying Straw Hat The life of a straw hat is brief at best, and water is one of its worst enemies, as the brim usually warps out of shape in drying, and the appearance of the hat is sp: iled. One remedy for this is to plac: the hat on a table and weight the brim down with several books or other heavy articles, but if the hat has to be hung up in a crowded office this can hardly be done. A simple homemade clamp. can be made from two pieces of thin board for holding the wet brim straight while drying, which will preserve the appearance and life of the hat. A hole is cut in the upper piece sufficiently large to admit’ the hat crown, and both boards are hinged together, as shown. A button fastener on the bottom board holds the hat tightly between the clamp. A number of holes are drilled in both top and bottom of the clamp to allow the air to circulate and expedite drying. GA %e-in. hole drilled in the pipe, just above the pump cylinder, permits the pump to drain, and prevents freezing.

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POPULAR MECHANICS How to Keep Artist’s Brushes Every user of small oil-paint brushes, or artist’s brushes used in oil, has been annoyed by the problem of keeping them clean after use. It is hardly possible to wash them, in kerosene, so clean that they will not harden on exposure to the air. Instead of attempting to do this, a good way is to cover the hairs with a thick coat of vaseline before putting them away. Vaseline does not dry out easily, and it is found that the brushes treated in this way show a better condition and a longer life—Carl Busch, Paso Robles, Calif. Hand Cutter for Thin Washers For cutting thin washers out of paper, rubber, or soft leather, it is convenient to have a tool which can be manipulated with one hand, while the other is em- ployed in holding the work. For such thin mate- rial, a tool with a handle is often more useful than the ordinary one intended to fit in- to a bit brace. The tool illus- trated is adjust- able within the limits determined by the length of the adjusting arm. The adjustment is made by un- screwing the bot- tom part of the handle, which permits the upper part to slide down enough to loosen the adjusting arm. After the arm has been set for the radius desired, the handle is again screwed up, clamping the arm under the screw head. The feather prevents the upper piece of the handle from turning with the lower piece, and a grip can thus be obtained for tightening up the tool. An old file handle is good raw mate- rial for the handle of the tool. A phono- graph needle should be soldered into the end of the screw as a center pin. The adjusting arm is cut out with the hack- saw from a piece of thin sheet steel, and a blade may be ground out from an old hacksaw blade. A piece of steel wire, soldered into a groove in the side of the screw to act as a feather, completes the materials required.—Chas, S. Rice, Wash- ington, D. C. CUTTING BLADE 933 Auto Wheel Operates Tire Pump The illustrations show how a common tire pump can be attached to the rear hub An Ordinary Hand Pump ma r be Converted by the Ingenious Motorist into a ower-Driven Pump of an auto wheel, and be driven by the engine. First, drill a hole in the free end of the hub-cap wrench, and fit it with a strong bolt, as shown. Two nuts hold the bolt solidly against the wrench, while a third nut acts as a stop for the pump rod, and the wing nut holds it on the bolt. Ar- range two setscrews on the wrench, so it will stay in position on the cap. Make a threaded sleeve and put it on the end of the pump rod, in place of the nut that holds the wooden handle. Then fit an eyebolt in the open end of the sleeve, to slip over the bolt in the hub-cap wrench. Arrange a second eyebolt in the foot plate of the pump, and fasten a bolt or pivot to the edge of the running board of the car, around which this eyebolt can oscillate. Set the bolt at such a distance from the hub that when the pump rod is drawn somewhat less than halfway out, the hub-cap wrench will be in a per- pendicular position. Then, by jacking up one rear wheel, blocking the other, and starting the motor, the pump will be made to operate, and the tires will be rapidly pumped up through a hose, which should preferably be made long enough to reach all four of the tires. Felt Hat for Filtering Oil A simple oil filter is made by suspend- ing an old felt hat inside the rim of a can or other container. The brim of the hat is bent over and tied with cord to the outside of the vessel. The inverted crown is filled with oil, which filters through the felt, any dirt or other for- eign matter contained in it thus being ef- fectively removed.

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Booth Has Adjustable Roof The booths housing concessions at summer resorts and amusement parks, being far from weatherproof, deteriorate

PULLEYS — STATIONARY POSTS —_ ey TT tae “~~ COUNTER - «ith! 4) MEE m i i WHIT A ] =. <1) Har OMT ra WAY Maha TD UAE Alt ~* ROPES FOR

RAISING ROOF Adjustable Roofs on Concession Booths at Parks and Beaches, Protect Booth and Contents from the Weather rapidly during the idle months between seasons, when the booths are closed. Also, a sudden storm often spoils or damages a considerable stock of goods before the sides can be covered. Booths built with an adjustable roof, such as shown by the drawing, have obvious ad- vantages. Holes are cut in each corner of the roof, which slides up and down on the corner supports. The roof is raised or lowered, as desired, by ropes attached to the corner rafters and pass- ing over pulleys at the tops of the cor- ner posts. Cleats are provided at the bottom of the booth, for securing the rope when the roof is raised. During a storm, between seasons, or at other times when the booth is closed, the roof is lowered, the eaves covering the counter and keeping out snow, wind, and rain.— Paul L. Fetherston, Milton, Wis. Tool Holder Saves High-Speed Steel A tool holder of the type illustrated will cut down to a large extent the waste of high-speed steel due to throwing away pieces which are too short to be held in a tool holder. The shank is made of a size |

A Holder, Built to Take Long Pieces of High-Speed Steel, Cuts Down the Expense for This Metal POPULAR MECHANICS

to fit the machine; the bottom is sur- faced, and the sides at the front end are milled out. The groove in the top is milled slightly less in depth than the size of the tool, so that the tool-post screw will tighten directly on the tool. The small setscrew in the yoke on the front end of the holder grips the tool securely, quite near the cutting end, and prevents chat- tering. A long piece of high-speed steel can be used, and can be dressed off many times before it becomes too short. It is, however, Bossible, when necessary, to use tools as short as can be used in the ordi- nary holder. The position in which the tool is held does not provide any top rake. When used on materials other than brass or bronze, it is therefore necessary to provide suitable top rake by gripping the holder at an angle. Screen Panels Held Securely Small screen fasteners, as shown in the sketches, are a good thing to use when putting up the screens on the porch. Made of light sheet iron, they are — constructed, and, with the screws placed as shown, hold the pan-

els securely Wp, side by side, YW [They are a a lifted from in aaa ca ttl the screw ORDINARY ANGLE 4 FASTENER rasteneR heads by the bent- over portion on the top edge. The fasteners are cut to size with a hacksaw, and the notches for the screws are made with this tool or with a chisel. Special shapes are provided for use in corners. Coppering Solution for Marking Steel Scriber and punch marks are difficult to see on finished steel work; this trouble is eliminated by giving the steel a copper coating before the marks are made. Make a solution composed of 1 oz. copper-sul- phate crystals (also known as bluestone or blue vitriol); 4 oz. water; 12 drops of nitric acid, and 1 oz. gasoline. This solu- tion, when bottled, will have a blue-green color, with the layer of clear gasoline on top. A piece of waste is moistened with the solution and rubbed vigorously on the

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metal, and an even coating of copper will be the result. The function of the gaso- line in the solution is to dissolve any grease or oil on the surface of the metal to be coated, which would otherwise pre- vent the copper from taking hold. Garden-Tool Rack and Lock A simple tool rack, that insures finding the garden tools where they were placed and prevents their being “borrowed” . without the own- er’s knowledge, is shown in the ac- companying drawing. The wooden back is made from l-in. ma- terial, and a block of the same thick- ness is nailed or screwed to each A screw eye is placed I, shown, in the center of each block, so that both end, as eyes will be in the same line. A piece of round iron rod is provided, with an eye at each end, One end of this rod is attached to one of the screw eyes with a bolt and nut, as shown, the projecting end of the bolt being “upset,” or riveted, to prevent its removal. The bar is locked by a padlock, which fits through the screw eye and the eye on the rod at the opposite end—J. H. Moore, Toronto, Ont. Angle Screwdriver for Tight Places The screwdriver illustrated was origi- nally made for the work of installing a new heating ele- ment in an elec- tric heater. It has the blade bent at an angle of 45°, and then ground off at each side to the same angle, so that it has two edges at right angles to each other. The peculiar - tool was soon found to be useful for many other jobs, such as getting at setscrews in telephone buzzers, and any other place where a small screw cannot be reached with the ordinary screwdriver. The method of use is to turn the screw as far as possible with one of the edges; it is then usually possible to get at it with the other edge, and continue the work, somewhat on the same prin- ciple as an ordinary S-wrench. POPULAR MECHANICS 935 Mixing Concrete by Gravity The sketch shows a self-mixing device without moving parts, which saved a great deal of time for the workmen on SAND,AND CEMENT ~ CONCRETE MIXED WHEN IT REACHES BARROW By Using a Long Trough, with Spikes Driven through the Bottom, the Concrete is Automatically Mixed a job of concrete construction. A trough, 2 ft. wide, was made of 2-in. lumber, long enough to reach from the mixing plat- form down to the ground. The trough was heavily braced in position. Through the bottom were driven a number of 20- penny spikes, in rows across the trough, 3 in. apart, the spikes being staggered in a vertical direction. The trough was held at an 80° angle, with the lower end high enough to clear the barrows as they were brought to be filled. On the mixing plat- form above, sand and gravel were spread out to an even thickness, and on top of this the cement was dumped from sacks. It also was spread out in a smooth layer, and the materials were then shoveled into the trough. Each shovelful contained all the materials in approximately right pro- portions, and they were thoroughly mixed in passing through the trough. The water pipe, not shown in the sketch, was con- nected to the upper end of the trough, and a valve in it regulated the amount of water which fell with the concrete ma- terials into the barrow.—Dale R. Van Horn, Lincoln, Neb. To Prevent Waste of Hay To prevent waste in feeding wild hay, which is light and easily nosed out of the manger, hang a short pole on the outside of the manger with short ropes. After filling the manger, the pole is thrown on top of the hay to hold it down. When using other feed, or refilling the manger, the pole is removed, and hangs from its suspending ropes on the outside of the manger.

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936 POPULAR A Gas-Burning Instantaneous Water Heater With a little labor, a very satisfactory water heater for the home can be made GALVANIZED-IRON : WATER TANK =

= i ‘o te s, : . : 1 Se 6s ee 3 1 . “SS e GHEET-IRON) S>~ te eae b 2 SIDES oa ‘es ‘of GASOLINE-STOVE ANGLE IRON P a BURNER Parts of an Old Gasoline Stove are Used in Making a Heater, for the Home Not Provided with Piped Water with parts taken from a dismantled gaso- line stove. It will heat water almost in- stantaneously. Four pieces of light angle iron form the framework, and serve as legs; they may be placed any convenient distance apart. They should be tied together at intervals by cross angles riveted in place, the upper four serving as a support for the water tank, which is made of sheet iron, just large enough to fit snugly be- tween the posts. Near one corner of the tank bottom, provision should be made for a length of %4-in. brass or copper tubing, which is to be firmly held in place by lock nuts and leather washers. About 15 ft. of this tubing will be required. The end connecting to the water tank should be threaded for a nut, and the other end for a water faucet. About 10 ft. of the tubing, nearest the faucet, should be formed into a spiral coil, the turns de- creasing in diameter as they near the outlet. At the lower end of the coil is mounted MECHANICS

a burner taken from the stove, the con- necting pipe leading out through the side of the heater and thence up to a smal! supply tank secured to the framework near the top. At any convenient point on this supply line, a valve is placed fo: regulating the flow of gas. The fram work is covered with squares of sh« iron, cut from the stove. These should be riveted to the angle-iron legs, or held in place by small stove bolts. For lighting the burner, and for access to the coil, a door should be left in th side. This may also be of sheet iron taken from the stove, hinged along the back edge and reinforced with angles or strap iron. When completed, the heater should be given a coat or two of black enamel. ; Soft Heads on Piston Pin One of the most vital of gas-engine troubles is caused by the piston pin wor! ing loose so that it cuts grooves in the cylinder walls. The only remedy is to re- bore the cylinders and put in new oversize pistons, or get new cylinders. However, the piston pin shown in the sketch will not injure the cylinder if it comes loose. In fact, several such sets have been in serv ice over a year. The ends are protected by soft-brass pieces, as shown. The tips should be made to a close fit, and pressed on.—S. E. Gibbs, Ames, Ia.

Sandpaper Pencil Pointer A very convenient pencil pointer is made from a block of wood, about 1 by 2 by 5 in., and a strip of fine sand paper. A V shaped groove is cut along’ the block; the sand- paper is pressed into the groove, and tacked at the side. The disad vantage of the common pointer, in gen- eral use among draftsmen, is that it is hard to give pencils a long enough point; this is overcome in the device illustrated, as it has plenty of clearance for the pencil, back of the point to be sharpened.—Forrest Benson, Boulder, Colorado. BLOCK OF wood

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POPULAR Rubber Bands for Head Lettuce In order to produce the best head let- tuce, each head should be tied up so that ‘t cannot spread out to become tough and ereen. This can be done with twine, but more convenient way, by which good results have been obtained, is to use rub- ber bands, made from an old inner tube. Pincushion on the Sewing Machine sasnsetestassesahinsiiaiba A very useful thing on a sewing machine is a pin- cushion, made of { a piece of flannel t t/ wound around the I oe | machine as 4 ul shown in the drawing. Installing Strainer in Hand Pump ordinary hand pump had been giv- me a good deal of trouble from small nes and other such dirt being drawn through the pipe, and n becoming lodged in the ver washer or - e. Whenever occurred, the imp ceased to liver water, and t was necessary » dismantle it to the stones, METAL TOPS FROM VASELUINE BOTTLES move SCREEN, lo overcome this, 33 THI { have installed PIPE PLUG,!5, az = the strainer illus- dj P t trot ral : 1 a wy si” tl i ated in the draw- ¢ ' STRAINER | | ng. It consists of OLO.,: | - . Ww piece of ordinary Mernoo | :| “4” wire window a creening, prefer- ably coppered or galvanized, rolled into tube, and soldered at each end to a ‘ollar made from the metal top of a vase- line bottle. One of the tops should have hole made in its center, large enough for water to pass through, The strainer, thus completed, is placed in a pipe tee, onnected as shown. All water drawn up by the pump is thus strained through the screen wire, and no stones or large particles of dirt can pass through. After the screen is placed in the tee, an ordi- nary pipe plug is screwed in, not too tightly to prevent the escape of the wa- ter, or the entry of the air. To clean this, the pipe plug is removed, giving access to the screen—Chas. H. McMa- hon, Miami, Fla. MECHANICS 937 Table for Use in Automobile A woman, under a physician’s orders to remain most of the time out of doors, A Small Coupé, Equipped with a Table cf Simple Con- struction, Provides a Com- fortable Outdoor Workroom. Resting on the Car Door and the Steering Column, It Is Easily Detachable solved the problem of an outdoor work- room in this manner: rhe small coupé she owned was equipped with a table, compact enough to be stowed in the back of the car when not in use, and strong enough to support a typewriter. This table was nothing more than a straight board, 27 in. long by 11 in. wide, fitting in between the closed door of the car and the steering post. The right end of the board rested on the metal rod on the door, and was kept from slipping forward by a stay piece on the underside. The left end of the table, shown in the photo to the right, had a large notch cut in it, to fit around the steering post. Two cleats were nailed on the underside: the one under the outer edge a_ triangular-shaped block, placed so that the hypotenuse face rested against the steering post; the other pro- jecting backward underneath the board for 4 or 5 in., so as to rest upon the steer- ing wheel. A strip of adhesive plaster, wrapped around this inner cleat, protected the wheel from injury. A button, about 5 in. long and rounded at the end where it came against the steering post, was screwed down above the inner cleat; when in position, this button projected out over the notch, and prevented the table from slipping down the post.—Ethel Van Cise, San Diego, Calif. Opera Glasses Enlarge Drawings To enlarge small printed plates or drawings for studying lines and details, which is especially desirable in pen-and- ink work before redrawing to larger scale, use a pair of cheap opera glasses. After redrawing, reverse the glasses, and the work is shown properly reduced.

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POPULAR Frame for Painting Rowboats To lighten the labor of painting row- boats and canoes, particularly if a number are to be painted, the frame described MECHANICS end horses in line with the run. Large pointed screws, with wing nuts attach: are provided at the inner ends of t bases for regulating the distance between the supporting horses, REVOLVING BOW BRACKET BOAT IN BRACKETS READY FOR PAINTING €x6" POST " 2X6 BRACE FIRON Guide 2x 6 PLANK V 13"PIPE WASHER QQ, COLLAR py i" : PIN TO PIPE ON BOTH SIDES . OETAIL OF BRACKET SHAFT AND BEARING 24" BRACE NOTCH,465° OETAIL OF END OF POST DETAIL OF ADJUSTING FRAME A Frame for Paint- ing Small _ Boats Allows the Boat to be Turned Over to Any Position, as the Painting Pro- gresses. The Device Accommodates Any Size of Boat herewith will prove its value, as it allows the boat to be turned as the work progresses, and makes the job fast, clean, and systematic. In addition, it is adjusta- ble to various sizes of boats. The run, or foundation for the frame, should be made considerably longer than the largest boat to be painted, so the end horses may be pulled away from the boats without pulling them off the run. If one plank is not long enough for the run, two or more of the same width may be lined up and fastened, flat side down. No definite measurements can be given for the end horses, on account of the variations in size of boats. However, for the average boat the base should be at least 4 ft. wide, and the upright support about 3 ft. high. Material for the base should be of the same size as that used for the run. The end post is mortised to the base; mortised joints should be used wherever possible, as additional strength is thus obtained. The bottom crosspieces of the end horses are bolted to the braces and uprights. A piece will have to be removed from the center of these bottom crosSpieces, to accommodate the run and base. When assembled, the bottom edge of the crosspieces should just clear the floor, without scraping. A metal guide, as shown in the drawing, is attached to thé’ outer end of the bases, to keep the The points of these screws should pro ject through the bottom of the base when screwed down, and pierce the surface of the run, so to hold the horses tight. By releasing the clamp screw, the horses m be slid along the run freely. Near the top of each upright a hole is bored as shown, so that a piece of 1%4-in. pipe will mal a tight fit in it. The are the bearings for t! bracket shafts; be su: that the holes are eq distant from the base. The size and shap: the iron brackets will d pend largely on the sty! of the boat, althou those shown will acco: modate the average flat bottomed boat. For round-bottomed boa: let the horizontal legs twist a trifle upwar at the outer corners, to grip the rou bilge at a better angle. Make the bott: screws quite long, to allow freedom of a: justment. The top clamps may be sho —just long enough to grip the top « the stern or fit over the transom. square hole is cut about the center each bracket, into which is riveted th square end of the steel shaft. As me tioned above, the shaft revolves on pij bearings. A collar is pinned on the bracket end of the shaft, and a nut and washer on the other end can be tightened so as to hold the boat in almost any posi- tion. Music Kept on Back of Piano One user of a piano manages to avoid the untidy appearance of sheet music scattered over the without the cabinet for it. expense of the piano of providing a The piano was set at a top 45° angle across the corner of a room, and on the back of it were attached six pockets, made from ordinary canvas, each large enough to take sheet music. Each pocket was held in place by seven sma!l wood screws, with washers under the heads, to prevent tearing the canvas.— Jas. E. Noble, Portsmouth, Ont.

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POPULAR MECHANICS Atomizer Injects Carbon Remover into Cylinders Most motorists have tried the various liquid carbon removers, and although many believe in this treatment, few give it a fair trial. The liquid, poured into the cylinder through a spark-plug hole, can only reach the piston and valves; there is no way of telling whether these parts are completely covered unless large quantities are used, and then the liquid is likely to get into the crankcase. An atomizer, such as used for spraying the nose and throat, makes it possible to apply the carbon remover to almost any point without wasting the fluid. An ato- mizer with a long nozzle should be ob- tained; if the shape is not exactly right, it can be bent to suit by warming the hard- rubber tube over a flame, or in hot water, and holding it in the shape desired until ‘4 ool. Shelf-Bracket Barrel Support When putting an oil barrel on the table or workbench in the shop, two shelf brackets, screwed to the table, will make a _ satisfac- tory support to keep the barrel from rolling off the table on which it rests, Ruling Paper with a Comb A simple but satisfactory way of ruling a number of parallel lines on paper is to place a sheet of carbon paper, face down, upon it, and then to draw a comb across un- der moderate pres- sure. A smooth sheet of blotting paper makes the best foundation. A straightedge should be placed at one side to serve as a guide, and the carbon paper should be fastened down at one end with thumb tacks. If lines spaced farther apart are desired, every other tooth may be re- moved from the comb, or every third or fourth one only left in place. By going over the paper a second time, having it turned at right angles, cross-section paper may, be made; 939 Automobile Becomes Locomotive for Narrow-Gauge Railway The peculiar locomotive shown in the photograph was built for use on a bridge-

Construction Gang to Act as a Narrow- Gauge Locomotive, and Haul Building Material building job, in western Arkansas. The boss in charge of the job bought an old touring car with a worn-out body, but with its power plant still in good condi- tion. The chief mechanic built a narrow- gauge chassis with flanged wheels, and then mounted the old engine on this frame, shortening the transmission shaft to fit the shorter wheelbase. The differ- ential unit was hung within the car frame, and two small sprockets were mounted upon the old driving axle, which had been cut off at both ends to fit flush with the ear sills. From these sprockets chains were run to larger sprockets, on both axles of the car. The tooth ratio was such that the speed was cut down to about 20 miles an hour, with the “loco- motive” pulling a full load—John B. Woods, Little Rock, Ark. Drill for Fiber and Soft Metals The drill illustrated is the result great deal of experimenting with material as fiber and hard rubber. If these substances are drilled with a tool sharpened in the ordinary way, a very rough edge and often an irregular hole will result. <A_ drill ground as shown -will cut a clean, smooth hole to a quite ac- curate size, and will do the work faster than the ordinary drill. Such materials as copper, lead, and bronze can also be handled with a drill thus ground, and there will be no grab- bing or twisting. of a such

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940 Ash Sifter Prepares Potting Soil The photograph shows how an ordi- nary rotary ash sifter may be used by the florist in preparing compost dirt for ARotary Ash Sifter, Operated by a Crank, Is Used by One Florist in the Preparation of Compost Dirt for Potting. The Pro- cess is Found to Improve the Qual- ity of the Soil flowerpots. The soil is put in the chute, where it passes into the rotary sieve operated by the crank handle. This sieve shakes up the compost, but allows only the finer parts of the soil and silt to pass into the can underneath. This idea is particularly valuable for removing snails from the compost dirt, as they sometimes do considerable damage to valuable plants when these are put in the greenhouse. The use of the sifter for this purpose does not prevent its being used for its original purpose at any time. Soil pre- pared in this manner is very uniform in character, and much more satisfactory for flowerpot work, than when common compost dirt is used. Gumming Saws with a Reamer Not having the usual equipment for gumming a circular saw, I made use of a brace and a fluted taper reamer. Loop- ing a piece of No. 9 gauge steel wire around the outside washer of the saw, and around the shank of the reamer, I held the reamer ip the brace, and began cutting with the reamer the circular hol- lows between the teeth of the saw. The wire around the reamer and the saw washer held the reamer in against the POPULAR MECHANICS work, and 10 turns of the brace for each tooth were sufficient to gum the saw properly. Although the slot is by such a method cut considerably to the right of center, this may be remedied by re- versing the saw for half of the work. It is advisable to keep the reamer shank oiled, where it works against the loop of wire—Harold Schobert, Yorkville, Ill. Tire-Pressure Gauge Attached to Hose Connection In nearly all garages where free ait is supplied to customers, the mechani or salesmen are constantly asked for the loan of an _ air gauge. In some cases the gauge is not returned, thus causing a loss to the owner. To stop this practice of borrowing, and to provide. the trade with a gauge that will be at hand at all times, some _ ga- rage owuers are attaching a gauge to the end of the air hose, clamping it to the connection with a small clamp ane stove bolts. In this position the gaug: is ready for instant use by the motorist and is always in place when wanted. Th: clamp is made from a narrow strip ot! copper or brass, or from seamless tubing HOSE CONNECTION TO AIR TANK Shelves Built in Porch Railing There is a great deal of waste space between the walls of a solid porch rail ing, which might just as well be utilized | (CAP coo: | i=l SHINGLED | | | OUTSIDE | h In Many a Porch Railing There Is Space Whic can be Utilized for Stowing Small Objects as not. This has been taken advantage of in the manner shown. The railing was sheathed all around on the inside. Four sections of this

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POPULAR MECHANICS sheathing were cut out at various points; the sections were cleated, and when re- placed were hinged, forming doors which were fitted with snap locks or latches. As the titnbers of the railing were 2 by 6 in. in size, there was a space 6 in. wide between the walls of the railing, into which could be stowed rugs, ham- mocks, short lengths of garden hose, etc. in case of a sudden rainstorm, this is a quick way of disposing of the small things about a veranda which might otherwise become wet. Incubator for Raising Bread It is difficult in cold weather to main- tain the proper temperature for bread dough during the raising process. Some housewives have found an incubator suit- able for this purpose. The thermostat is adjusted to hold the temperature in the machine between 85 and 90° F., after which the lamp is lighted and the dough placed in the egg chamber, with a shallow pan of water to supply moisture by evaporation, Reinforced Bottom for Copper Wash Boilers [he copper bottom of a wash boiler often wears out before the rest of the vessel, due _ to wear from the bottom side, This can be largely prevented by in- stalling a sheet of coarse wire mesh, indicated in the cut, and sol- dering it around the edge. When the wire mesh wears out or gets broken, it can be removed by melt- ing out the solder, and substituting a new mesh bottom, thus greatly prolonging the usefulness of the boiler. _.. COPPER BOTTOM —- BOILER Straightening New Rope New rope is often hard to use on ac- count of kinks and bends. A neat device for straightening it is made by bolting some large spools in a straight row, so that each one turns freely; the rope is then threaded in and out among the spools, and is drawn through, which re- moves the kinks and makes the rope more pliable. 941 Rubber Shock Absorber for Auto An effective shock absorber for a light automobile was made from an old inner tube. The tube was first straightened CLAMP —— An Inner Tube, Cut into Two Strips of Rubber, Forms a Shock Absorber Which will Better the Riding Qualities of a Light Car out, cut through, and'‘spl?t twice length- wise, thus forming it into two long rib- bons of rubber, one for each end of the rear axle. These were wound around the axle, and around a hanger, which was made from some scraps of metal and bolts, as illustrated. The two ends of each ribbon were clamped by the use of simple metal clips, to keep them from slipping around. For the best effect, such a shock absorber should be mounted while the car is loaded with a normal weight of passengers, or an equivalent weight. This is in order that in opera- tion the rubber will begin to stretch, just as soon as the frame begins its travel above its normal position. That is, the rubber should exert no force while the springs are being depressed, or while they are returning to normal, but the action should begin immediately when the car begins to be thrown upward by the re- bound of the spring.—Chas. Walte, Louis- ville, Ky. Simple Method of Adjusting Droplights When there is no ball or other device for holding the light cord at the desired height, the meth- A od shown in the s ~ PULLEYS —~ sketch may be utilized. Place two pulleys in the ceiling, in line with the rosette. Pais Tie a stout cord to the electric- light cord, about A halfway down, . WRIGHT and run it through the two pulleys, attaching a weight to the other re i which will just balance the lamp.

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942 POPULAR A Sewage-Disposal System for the Summer Cottage One of the drawbacks of summer-cot- tage life is the lack of an adequate method for getting rid of sewage. Sewer lines are usually impractical, because of the expense, and the water level is often so near the surface that it is impossible to se- cure _ sufficient drainage to per- mit the installa- tion of a standard type. of septic tank, or cesspool. As a result, waste is sometimes al- lowed to accumu- late at the rear of the cottage in an GROUND f LEVEL Oc recpnais r unsightly, dis- ion” stone € ase - breeding puddle. This condition can be obviated by the use of the little septic tank described and illustrated herewith. The actual cost is but small; an empty barrel (preferably an old oil barrel), a sack of Portland cement,.three short lengths of 2-in. tile or galvanized gas pipe, and an elbow, are about all one need purchase, for the rock and gravel are usually to be found in the hole, or near by. This system can be installed in a single day. First, a hole about twice the diam- eter of the barrel is dug to the desired depth. If the water level permits, it should be dug deep enough to provide good drainage in gravel or rock. Next, two holes are drilled in the barrel, as shown in the cut, and the inlet and outlet pipes are inserted. This being done, a few large rocks are thrown into the hole, and the barrel is put in place; the space between the outside of the barrel and the hole is filled with rocks, care being taken to place them in such a way as to provide the greatest possible amount of open space between them. The pipes are then sealed into the openings in the barrel with mortar; the top is covered with boards or heavy paper, to prevent the wet concrete from running down and filling the voids in the rock, and a rein- forced-concrete slab is put in place, cover- ing the barrel and the stone. The structure is now completed, and is ready for use when connected with the kitchen drain. This gives an effective septic tank or MECHANICS system; the barrel forms the air-tich; compartment, and the stones about the barrel take the place of a porous tank. If properly installed, with the pipes en ing. below the surface of the liquid, ; indicated in the cut, the sewage will | completely decomposed in the two com- partments, and will seep away in the form of a fluid. When the hoops about the barrel rust away, the staves will be held in position by the rocks. The barrel itself will resist decay as long as it is constantly saturated with water, and the tank will continue to serve its purpose, with no item of main tenance, for a long period of years.—Pau! Llewellyn, Milwaukee, Wis. Holding Tapered Work in Shaper By mounting a piece of metal in a sort of ball socket joint in a shaper vise, as il- lustrated, it is pos- sible to hold for machining a piece of work having any taper withi: the capacity of the device.—Loui Barber, Wor- cester, Mass. Tile Gate for Small Dam Much trouble is often caused by a leak- ing gate in a dam. A square gate may stick just at the time when it is to be raised. Such difficulties can be avoided by using a simple gate made of a piece of tile pipe. Put the tile through the dam with the col- lar end inside the dam. Bolt a pole or narrow plank to a round wooden disk, which will just fit the col- lar of the tile; have the pole long enough to project above the water level. The gate thus formed is placed in position as shown, and some dirt is thrown against it, to hold it in place. This closes the outlet through the dam. When it is to be opened, remove the cover from the end of the tile by using the long pole as a lever,

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Anrormation as to where to obtein any specifieu materials or parts for making objects described in the following pages may be had, on request, from our Bureau of Information.—Editor. Portable Camping and Sleeping Tents By NORMAN F. MILLS HE two principal drawbacks of camp- is closed by a strip of canvas, 7% by 8% ing out have always been the incon- _ft., and, as in the case of the sidepieces, iient bulk of the average tent and the it is provided with grommets, 5 in. apart, irdship of sleeping on the ground in on one of the short sides, for lacing to id weather. The tents shown in the two accompanying drawings are particu- "OPE 'N PLACE OF RIDOEPOLE larly adapted for easy transportation, and at the same time provide adequate shelter. [he only parts that need be carried by camper who uses the tent shown in larger drawing are five, or, at the six pieces of canvas and the neces- ropes. The framework for this tent made of poles and saplings, which are at the camp site, as indicated in the rawing. The sides of the tent are rmed by two pieces of canvas, each arness &14 by 914 ft., both reinforced at all —— edges, by a light rope sewed into the : canvas. One of the short sides of each GUV ROPE ~ Pins 6 UPRIEHT POLS rip is provided with grommets, at 5-in, Portable, Canvas, Shelter Tent and, Folding Gog ntervals, so that the strip may be laced to the lowest horizontal member of the the crosspiece at the rear of the tent. tent frame. A grommet is also provided Ordinary clothesline will be found to be in the center of each long side, for tying amply strong for the lacing of the canvas, fhe cover to the curved end pieces of the \nother grommet is placed at the center frame. Each of the pieces overlaps the of the opposite side, for attaching the top, or ridgepole, of the tent by about strip to the ridge, or end pole. A grom- 1 ft. and each met is also inserted in each of the outer provided corners. A rope, passing through these two grommets, pulls the ends around on each side of the tent, where they are held securely by tying the rope to the front end of the tent framework. The 3 by 6-ft. cot strips are made of can- vas and reinforced at the edges, as described, with rope. Three sides of each strip are provided with grommets, spaced 5 in. apart, for lacing to the saplings or poles 5 . oT : Mt... STAKES HOLE IN CROSSPIECE§ This Tent is Adapted to Camping Trips, as Only Five or Six Pieces of Canvas) pepnuide . have to be Transported. The Poles are Cut at the Site hte ded at both sides and center for with a grommet at the corner for tying that purpose. If both ends of the tent are to the tent frame. The back of the tent to be closed, another strip of canvas, like 943

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944 that described for the back of the tent, will be needed; it should be provided with a 4 or 5-ft. slit in the center, with an inside flap to make a tight door. Another readily portable tent, shelters two ordinary folding cots, is shown in the smaller drawing. Such a tent requires four short poles of 1 or 14%4-in. material, about 4 ft. long... A metal pin is driven into one end of each upright pole; these pins fit into corre- sponding holes drilled in the middle of each crosspiece. The distance between the uprights having been determined, a rope of the proper length, with a harness which . Emergency Bicycle Repair A cyclist had the misfortune to break the frame of his machine, about 1% in. from the head. As it was impossible to have the break brazed, the eme rgency repair shown in BREAK ‘ = (* sme the drawing was RIVETS made. A wooden plug, which would just slide into the bar when sprung from PIECE OF Broom mance the head, was REINFORCEMENT made from a LUG broom handle. This plug was whittled so it could be driven into the reinforcement lug. The bar was sprung to one side; the plug was driven in, and the bar sprung back and slid over the projecting end. The frame was flex- ible enough to permit this, as only about % in. of wood was left to go into the bar. Afterward, holes were drilled through the bar and plug, on both sides of the break, and metal pins were inserted and riveted on both sides of the tube. A layer of tire tape completed this emerg- ency repair, which withstood several months of service before it was found necessary to have the break properly mended.—Otis S. Sawn, Springfield, Mass Imitation Wood-Inlaid Work Interesting ornamental effects that closely resemble inlaid work are easily produced in the amateur’s workshop, from shavings. The shavings are cut to the desired pattern with a pair of scissors, and glued to a piece of soft wood, rolling ‘with a rolling pin and using as much pressure as possible while the glue is still wet. If done carefully, and if thin shavings are POPULAR MECHANICS ring attached to each end, is made to take the place of a ridgepole, by slipping the rings over the projecting spikes o the upright poles. The pins also sery for attaching the end guy ropes. Holes are drilled through both ends of the tw. crosspieces, for guy ropes at each corne: The canvas cover is tacked to the cros pieces, and hangs over to form the end the sidepieces are sewed to the edges of the top, and tapes are provided at th corners for closing the tent. The harne rings and rope ridgepole may be sew to the canvas. During the daytime, th sides may be propped up at the corner used, the design will sink down almost flush with the base. When dry, coat with the best copal varnish and allow to dry for about three days. Rub down. with finest emery powder, give another coat of varnish and dry for five days. After this the work is again rubbed down with emery, then tripoli, then putty powder and finally it is polished with the palm of the hand. Another method is to trace the pattern on a piece of firm white wood, such as holly, and cut along the line with a sharp, thin-bladed knife. The knife cuts are filled with cement, or a composition of varnish and lampblack, and the separate portions are stained as desired. The ce- ment will prevent the running of the stain from one section to another. When dry, the work is rubbed down with the finest sandpaper, and again stained, and finally varnished and polished.—Garry Kimmel South Bend, Ind. Poultry Cleaners’ Table The drawing shows a practical and con- venient table for use where quantities of poultry are cleaned for the market. To make such a table, an old wagon wheel, a barrel, and a few light boards are re- quired. The spokes of the wheel are sawed off in a circle, so that each spoke will extend about 11% in. on the in- side of the barrel. The top edge of the barrel is provided with notches, as shown, for the ends of the spokes. These notches should be just deep enough to allow the wheel to come

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POPULAR MECHANICS flush with the barrel. The part of the wagon wheel outside of the barrel is en- tirely covered with light boards, to form the table, which is then placed in posi- tion on the barrel. Several operators can use the same table. The feathers and other refuse are thrown into the barrel in the center. Making a Hacksaw Run Straight It is difficult to guide a hacksaw cor- rectly when cutting a square bar of metal, even if lines are carefully drawn. A method of making the saw run straight -onsists in drawing lines on the four sides f the bar so that they meet at the cor- ners, using a try-square as a ruler. Shal- low cuts, or grooves, are made in the tal along the lines before the actual utting operation is started. The saw ill have a tendency to follow the will require little other rooves, and uidance. Simple Envelope Moistener \ moistener for wetting the adhesive acking of envelopes, stamps, labels, etc., can be easily made from a low, wide - mouthed bottle. A strip of felt, about 1% or 2 in. wide, is cut rolled tight- This roll is with a piece of stout cord to prevent its unroll- ing. One end of the strip is allowed to hang free; this may be either the inside or outside end, although the former would probally be the best. The bottle is filled with wa- ter, and the felt roll is pushed into the mouth with the loose end inside. As long as the water supply lasts, the felt will be kept continually moist, and en- velopes and other adhesive surfaces are moistened by drawing them across the felt stopper. _- STRING Adjustable Reading Stand The handy adjustable reading stand, shown in the drawing, consists of a read- ing rack which slides up and down on two supporting uprights, and is held at the desired height by means of pegs. The rack is made sufficiently long to span an ordinary armchair, and may be raised high enough to allow the reader to stand, as 945 is desirable when practicing a sermon or doing reference work, or lowered to suit . _ SLIDING _/ \\\| fie" MEMBER A Reading Stand That Is Adjustable to All Posittons, Whether One is Sitting, Standing, or Reclining the occupant of a chair, or it may be made to straddle a hammock or couch, Jt may also be placed on a double bed by having one long leg on the floor and one short leg on the bed, thus making it possible for an invalid to read in comlort. Tree Trunk Makes Novel Stand A part of an old tree trunk may easily be converted into an usual stand for potted plants. The tree trunk is se- curely attached, at the bottom, to a round or square base, sufficiently large to prevent upsetting. The branches are sawed off square, to form level sup- ports for the plants. Each branch is provid- ed with a pan, which is firmly at- tached with screws. A piece of sheet rubber, from an old inner tube, the same size as the branch, is placed underneath each pan be- fore it is fastened in place. A pleasing effect is obtained by planting some orna- mental vine at the bottom and allowing it to climb over the trunk.—Geo. Kluss- man, Long Beach, Calif. attractive and un-

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946 Live Bait Kept in Fresh Water \ set of old stationary laundry tubs, having the cracks cemented, make good tanks for keeping live bait, as well as the A Set of Stationary Laundry Tubs Used at a Summer Hotel for Keeping Live Bait in Fresh Water, as Well as Live Fish for the Table evening catch. The arrangement shown in the photograph is used at a summer hotel. Holes are drilled through the cen- ter partition, to permit water to circulate between the two tanks. A 2-in. hole is drilled just below the upper edge at one end, and fitted with an overflow pipe. A strainer over the pipe prevents escape of the “small fry.” Fresh water is supplied as needed from the pump.—Spencer A. Pease, Racine, Wis. A Ball-Bearing Porch Swing A porch swing suspended on ball bear- ings has no nerve-distressing squeak, and the swing will operate easier and with less effort. Screw hooks are screwed into the porch ceiling, in such a manner that the front hub of a bicycle can be secured between them, the hooks occupying the same position as the forks of the wheel. Two wooden blocks, which fit around the hub as shown, are provided for each hub. The suspension rods are attached to the hub hangers with a U-shaped iron clevis, which is clamped tightly around the blocks, as indicated. The suspension rods are made of % by 2'4-in. oak, or other hard wood, and the swing seat is POPULAR MECHANICS attached to them either with rods or chains, in the usual manner.—J. Garrett Kemp, Stillwater, Okla. Detecting Copper Salts in Food Copper salts are sometimes employed to improve .the appearance of peas, beans, spinach, etc. presence of this material, a sample of the suspected food is mashed with .a spoon in a teacup. Add three teaspoon fuls of water, and also 30 drops of hydro chloric acid (poison). Set the cup witl its contents into a pan of boiling water on the stove. Then drop a bright iron nail into the mixture,. and boil for 20 minutes, stirring constantly with a splin- ter of wood. Pour out the contents of the cup, and if there is any appreciable amount of copper salts in the food, its presence will be manifested by a coating of copper on the nail—S. Leonard Bas- tin, Bournemouth, Eng. canned To detect the Drill Made from Wire Nail The amateur’s lack of small drills, for wood and similar easily drilled material, is overcome by converting wire nails of different sizes to his purpose. —jges The point of a nail is flattened out with a few strokes of a hammer, after which the nail is placed in a vise and the flat- tened end is filed to the shape shown in the drawing. The head is cut off, and the re- sulting drill is held in the chuck of a small breast drill, in the same, manner as any straight-shank drill. An as- sortment of such drills will be found quite convenient in the pattern shop, for making small holes in bosses, pads, and other parts that are to be fas- tened loosely to the pattern, with wood or metal pins. Toning Photographs to Sepia The quickest and easiest method of toning sepia photographs is by the so- called “bleaching” process. The prints are exposed and developed in the usual manner, and thoroughly washed after fix ing. After washing, the black and white prints are placed into the bleaching solu tion, which is made by dissolving equal parts of potassium ferricyanide and potas- sium bromide in water. It might be added that potassium ferricyanide has a deep-red color and is a powerful poison:

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POPULAR MECHANICS also, that it should not be confused with potassium ferrocyanide, which is light yellow in appearance. The prints are al- iowed to remain in this bath until all traces of the image disappears, when they are thrown back into the wash until all have been bleached. The toning solution is made by dissolving 1 Ib. of sodium sul- phide (not sodium sulphite or sulphate) in 1 gal. of water, to be used as a stock solution, and diluted as desired. As soon as the prints are placed in the toning solu- tion, the image immediately flashes up in sepia, instead of in the original black and white. While not essential, better and more satisfactory tones are obtained by developing the black and white prints just a trifle darker than they would be if they were not to be toned. Handy Ice-Chopping Tool The cream open season for homemade ice and other frozen dainties is on again in full swing. The great objection to the home - manufac- tured kind has always been the messy results of crack- ing the ice with ineffective tools. The chopper shown in the drawing is made from an ordinary round wood mal- - let and a piece of flat file. The file is heated and drawn out at the end to a chisellike edge, the tang being driven into one face of the mallet. This tool may be used for chopping the ice, or for breaking it up when placed in a bag as indicated. Inner Tube Makes Rubber Type An outfit for sign marking is made by (drawing or tracing the outlines of letters and figures on old inner tubes. These letters are cut out with scissors, or a sharp knife and cemented to wooden blocks. The blocks are prepared by tack- ing a piece of rubber to the under sur- face. The letters are attached with ordi- nary rubber cement. In printing, a yard- stick is used to keep the letters in line and evenly spaced, and one character is printed at a time. An ink pad may be made by tacking one or two thicknesses of felt from an old hat to a block, and moistening it with ordinary stamp or printers’ ink, Lawn Table on Tree Stumps When two of a clump of four trees were so badly injured that they had to be re- moved, it left the remaining two, which ~ 2 we “sue sf Tad a Be | The Stumps of Two Injured Trees Provide a Support of Unquestioned Strength for a Lawn Table Made with Crosspieces it was desired to retain, very much un- balanced in appearance. To help matters somewhat, the suggestion of a_ table seemed a good one. So the trees were sawed off 32 in. from the ground, and 2 by 4-in. crosspieces fitted into the stumps. These afforded a firm support for the table top, built of 1l-in. lumber. A bench, set on two posts dug into the ground, completes this outdoor arrange- ment. Several coats of neutral brown paint will make the tree trunks and the table harmonize very nicely—C. L. Mel- ler, Fargo, N. D. Removing Matches from Holder Most folks merely tear an end from the box of safety matches after it has been placed in the holder. In this mannet an even layer of matches is. pre- sented, which makes it difficult for large fingers to withdraw the matches. Instead of using the inner part .of the box throw it away and use only the outer part which fits on the holder. From the discarded part cut a strip a trifle longer than the width of the box in the holder. This strip is bent in the middle and placed in the box underneath the matches, as shown in the drawing. They can thus be withdrawn easily—O. T. Fouché, New York, N. Y.

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riveted. Fire Irons for Auto Camping One motorist who does a great deal of touring carries a pair of fire irons, such as shown in the photograph. The irons A Pair of Fire Irons That Occupy Little Room Make a Thoroughly Satisfactory Arrangement for the Automobile Tourist’s Wayside Cooking are bent into the form of a “U,” to fit snugly around three sides of a suitcase, which contains the cooking utensils and is carried on the floor of the tonneau. The ends are sharpened so the irons may be easily thrust into the ground. A set of such irons may be made from either pipe or iron rod at slight expense.—Searle Hendee, Winnipeg, Man. Fishing Reel for a Youngster from an empty typewriter-ribbon spool and a few pieces of metal, as shown in _ the drawing. The base plate was made from an old piece of brass, which was bent to shape around a piece of pipe. A hole was drilled in the center of this strip, to which the shaft, made from a small bolt, was A hole was drilled in the spool, and a small handle riveted as shown. The reel may be attached to the pole by winding with fine wire, or cord—Douglas Aitken, Marshfield, Ore. Despite the high cost of tackle one young fisherman insisted on having a reel, and his ’ River =6vorder was filled WAU \" a satisfactorily by BRASS o tk; : ; » WEE — making him a \ workable article Ay P+ TYPEWRITER pe RIBBON oe ee PIECE OF BRASS @It has been found that when an auto- mobile brake lining is put on so as to leave an open gap of % in., much dirt and grease will gather in this gap, which would otherwise soak into the lining. POPULAR MECHANICS Using Spray Pump for. Liquid Fire In an oil-pipe line from one building to another, the sluggish flow, due to intense cold, was remedied by igniting the kero sene spray from an ordinary force-spray pump. The flame was several times as large as that from a gasoline torch and attained a high temperature. Moreover, the fuel used was not so expensive. The same device can be used to advan tage in clearing ice from walks in winter and burning trash along fences in sum- mer. In wet weather in the spring, when rains prevent hoeing in the garden and in cases where the plants are not yet above ground, this torch can be used very effectively in searing the shoots of weeds and grasses just getting above ground. The flame will cover a swath 2 or 3 ft. wide, and will check the growth of weeds for several days, at the same time doing no injury to the seedlings under the sur face, unless the flame is applied to the same spot for several minutes. Spool Stopper for Glue Bottle The ordinary bottle containing adhe- sives usually has a cork stopper, which speedily becomes broken and use- je J HALF OF A less - . 1 leas THREAD ess, Causing the / SPOOL contents to evap- Naan. orate and thicken. The trouble is remedied by cut- ting an ordinary thread spool in half, as shown, the hole in the spool being used for the brush. Such a stopper is also. easy to remove.—W. E. Moore, Versailles, Ohio ~MUCILAGE BOTTLE Handy Temporary Attachment Plug A wooden handle and the brass base of an old light bulb can be combined, as shown, to make an attachment plug which is useful when no standard plug is at hand The handle is drilled out, for BRING OUT END OF WIRE AND SOLDER OLO LAMP_L HANOLE BASE SMALL SCREWS An Old Light-Bulb Base and a Wooden Handle Make a Convenient Temporary Attachment Plug

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POPULAR MECHANICS its entire length, to accommodate the lamp cord, and the bare ends of the wire are soldered to the brass base, as indi- cated. Small screws hold the lamp base to the handle. The wires should be well wrapped with electricians’ tape, and the plug should be kept dry. Hanging Shelf for Motorboats Adding to the restricted space of the average motorboat is not the easiest thing to do, but a sim- ple hanging shelf, such as the one shown in the drawing, solves the problem. A wooden shelf, made to the size desired, is sus- pended by %4-in. ropes attached to two stout hooks, which fit over the sheer clamp of the boat. The edge of the shelf, rest- ing against the hull, is curved to conform to the curva- ture of the hull. This edge, and the corners, are bound with canvas, to protect the finish. A strip of wood may be attached to the front edge of the shelf, to prevent articles from slipping off in rough weather. Temporary berths and racks for clothing may also be installed in this manner—Wm. F. Crowell, Providence, R. I. > 5 PLANKING SS a, RiBS i V4" ROPE Campers’ Print Washer Most amateur photographers find de- veloping and printing in camp very in- convenient on account of the lack of running water. For a few cents, a small tin pail with a wire handle and cover can be obtained, and several rows of holes are readily punched around the top and bottom of the can. These holes are punched from the inside, with a large nail or spike, to avoid ragged metal edges which would scratch the films and prints. At opposite points and just below the rim of the bucket, small holes are made, and corresponding holes are punched in the flange of the lid; these holes, when fitted with small wood plugs, prevent the cover from being detached. After fixing, the prints or films are placed in the bucket, and the whole is set in the near- by stream for the necessary washing. Hat and Coat Hanger A neat and attractive wooden hat and coat hanger, that harmonizes well with almost any surroundings, is shown in the Kt A_Wooden Hat and Coat anges of Art-Craft Style Harmonizes Well with Any Surroundings, and is Easily Made by the Amateur Woodworker drawing. The material used for all parts is %4-in. oak, with the exception of the base, which is of ¥4-in. stock. The edges of the base are beveled off smoothly to half the thickness, or 4% in. The arms of the hanger will require a mortised joint, as shown. The lower arm, which is used for coats, has a small block screwed to the outer end. The arms are assembled to the base with screws, and the whole is stained or varnished as desired.—Chas, Glasser, Long Island City, N. Y. Loader for Air Gun Many a lad has exhausted his time and patience in dropping “BB’s” into his re- peating air rifle. As the shot must enter the magazine one by one and the average gun holds about 250, the lit- tle device shown in the drawing will be welcomed by the young marksmen. Guns of the type men- tioned are usually loaded through an ‘ opening on the underside of the barrel, near the muzzle. A small tin cone is held in place on the barrel by a clip. The hole in the bottom of the cone, or fun- nel, is only large enough to admit a single shot at a time. The shot are poured into the cone in a single stream by the trough shown. All parts of the loader are made from pieces of tin, the cone requiring to be soldered to the clip, as indicated in the illustration.

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POPULAR MECHANICS A Ring for Boxing Practice The U. S. tive need Navy recognizes the impera- of athletic training to make its men fit. The art of boxing is greatly encour- aged on board senaannaenaeenal na » the ring, shadow boxing holds a promi nent place in the system of training. In this form of exercise, the boxer strips for action and goes through all the moves of boxing with a pretended opponent, but as the blows which he blocks are imagined by himself, the element of the unexpected is lacking. To provide this element, one of the training stations ha RRS \\ \ VV \\ V\\\ 14}t4 4) HUEY Lt LAAN AY Wey i \ Wt 4 hy arranged a number of electric lamps on the up per rope inclosing th boxing platform. Ana sistant operates a simp] keyboard, and as each lamp flashes for an in st p ys} ii $y We fy) MELE stant, the boxer swing into position, and go: through a prescribed move. A red light means “Block a blow on the chin,” a blue light “Dodge an weppercut,” and so on. It is the busi ness of the operator to To Assist an LEE eee in Shadow anton, a ees Ring is Strung with Colored Lights, Each Indicating a Different Form of Attack ship, and, as a means of increasing pro- ficiency in all the intricate movements of avoid using a light which is behind the boxer, but as the boxer is constant- move, this is not difficult.— Adams, Indian Head, Md. ly on the Lieut. H. Double Chains Raise Piping from Well Occasionally it becomes necessary to remove the pump piping from a well for making repairs. PUMP PIPING ‘Ig raise the en- tire column of a pipe is quite diff- cult by direct muscular effort, but a simple ar- rangement of a lever and two or- dinary trace chains make the much easier. Erect a post on each side of the well so that, when the two cross- pieces of scantling are nailed to them, as shown, they will stand at least 12 or 14 in. away from the pipe. These two crosspieces are placed at the heights indicated, and a stout lever is obtained for use as illus- trated. By prying up and down with the lever attached to the lower chain, the pip- ing can be raised just as a weight is raised will job = WELL by means of a jack. Each time the piping is raised, the upper chain grips it and prevents it from falling while a new grip is taken with the chain on the lever. Penknife Made from Cartridge The sketch shows a small sheath knife, made from a rifle bullet and cartridge shell, the latter serving both as handle and sheath. The blade is fastened to the broad end of tke bullet, so that, when the nose of the latter is thrust into the cartridge, the knife is ready for use; and when it is to be carried in the pocket, the blade is thrust into the cartridge, leaving the point- ed end protrud- ing. The safest way to make the knife is to use an empty cartridge, but if a live one is to be used, be careful not to explode the cap before removing the bullet and powder. To accomplish this, pass an empty cartridge over the GROOVES NEAR END OF JACKET) o “SLOTS AT F JACKET SS __ GARBED TANG OF BLADE”

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POPULAR nose of the bullet, work it up and down, and the bullet will come out in a few seconds. Pour out the powder carefully, place the empty cartridge in a rifle, and explode the cap. In this way the maxi- mum of safety is insured. Then melt the lead in the steel jacket, pour it out, and file small slots across the flat end, as hown. Shape the blade out of a piece thin steel, forming barbs on the tang, shown, temper it, slip it through the lots in the jacket end, and fill the jacket gain with lead, so that it will hold the lade firmly when it hardens. To secure bullet in the cartridge, or sheath, file groove around the bullet near the flat end, as shown, and two others lengthwise on opposite sides; also, punch two de- ions at the mouth of the cartridge, that small bosses will be formed in- de it which will fit into the grooves running along the bullet. When the tter has entered the cartridge as far as he encircling groove, give it a slight turn, and the bosses will hold it securely. C, M. Vaiden, New York, N. Y. Handle for Fruit Baskets Old fruit baskets would find plenty of instead of being discarded, if they were provided with handles. Also, they would be more con- venient to handle andcarry. The draw- ing shows an eas- ily made and ap- plied handle, made from a barrel hoop. The hoop is cut in two, and a hook of. stiff wire is attached about 1% in. from each end. The hoop is. sprung together, and fitted inside the basket, and the hooks brought around the outer rim. if wire of sufficient stiffness is not avail- able, the length of the hooks may be made greater, and the ends brought around in- side the basket rim and wrapped around the handle. wses

To Make Any Ink Indelible Ink of any color may be made indelible, without affecting its color or other char- acteristics, by dissolving in it a crystal or two of silver nitrate. The action of light on the written matter makes the markings permanent.—Frederick C. Davis, St. Jo- seph, Mo. MECHANICS 951 Shoelaces Secured without Knots A method by which shoes can be laced and fastened without the customary knot at the top of the vent is shown in the illustration. One tip is cut from the shoestring, and a_ hard, flat knot tied in that end. The string is SBaesed through the bottom _left- hand eyelet— No. 1 in the drawing- from the in- side, and laced through the eyelets as indicated un- til it has been passed through No. 12. It is then in- serted in No. 11 again, from the outside, and pulled out at the top of the shoe, leaving a large loop between No. 11 and No. 12. Beginning with the part nearest No. 12, the string in the loop is laced on the hooks toward the top of the shoe, and then back, passing around the hooks in numerical order. BLADE = 7A —_

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How to Build a Glider for Ten Dollars GEORGE D. WHITE M* ANY types and poe of gliders have bolts, which hold together the wing beam been described, but the average aero wing brace, and rib, as shown in the de enthusiast has been deterred from build- tail. The front ends of the ribs are nailed ing them, largely because of their expense. flush with the ve edge of the front The glider described in this article, which wing beam, using flat-headed shingle nail weighs approximately 30 lb., and has a_ as indicated. Shing + nails are also used wing area of 250 sq. ft., can be built for for securing the ribs to the rear wing $10, or less, all materials being bought. beam. The wire trailing edge is stretch: On account of its strength and light- along the rear ends of the ribs, to which ness, fir or spruce are to be preferred, it is attached with tin strips tacked to th white pine or other available woods being ribs, as illustrated in the detail. Mark used with satisfactory results instead, if the location of the guy wires on both the others are unobtainable. wing beams, and tack a small block that The wing should be built first, two of comes flush with the top of the ribs; th the 13-ft. pieces being spliced at the center function of the block is to prevent the and wrapped with soft wire, as indicated wing fabric from being wrinkled when the in the detail drawing, to form a single guy wires are tightened up. beam of the right length. After both lhe wing assembly, when completed, i wing beams have been assembled, with ready for covering with ordinary un the splices at the middle, the four wing bleached muslin. The fabric, 1 yd. wide, braces are secured to the underside with is cut into 6'-ft. strips, which are sewed bolts. The wing-frame assembly having together to make a single piece 644 by been completed, the locations of the ribs 27 ft. The cloth is first tacked undet are marked on both wing beams. The neath the front beam, and is the: ribs are bent to the camber shown in the | stretched across to the rear of the wing detail, by steaming or by dipping them where it is doubled under and sewed into hot water for a few minutes and then around the wire trailing edge with stout holding them to shape by nails until dry. thread. The ends of the wing fabric The two end ribs are attached to the are tacked to the underside of both wing wing frame at front and rear with long end braces; the fabric is also tacked l

OUTRIGGER CORNER BRACE ix3°STRAP — ~ ST ps NS

° ~- SMALL ty _OUTRIGGER BRACES : > Sa NAILS | ‘s ~ xi xXil-64 = | MUSLIN . © 4 ~_* 2 So DETAIL OF REAR-BEAM | >) RIB ATTACHMENT RUDDER —— \ 72 eg a S ; i 1X1 X4FT. PYLON BRACE DETAIL AT B 2 5 WING BEAMS - 2 -— soseupas 1) IBGE ‘

SHINGLE NAILS

| Ui a ae | 7 Pl \) DETAIL OF WING BEAMS SHOWING SPLICE AND eT ' gf ie WIRE WRAPPING

{ (This Glider, Which Weighs Approximate- se , ly 30 Pounds and Hasa Wing Spread of Rx3 : : g 250 Square Feet, can be Built for $10, or STOVE 2. Less, All Parts being Bought. With a ocur £ Glider of This Type, Great Skill is At- DETAIL OF FRONT-BEAM tained with but Slight Practice RIB ATTACHMENT DETAIL ATC 5 seo

, eee

952

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POPULAR MECHANICS to each rib, the tacks being spaced 2 or 3 in. apart. When finally secured to the wing assembly, the wing covering should be tightly stretched, without wrinkles, but not so tightly that the wing will be twisted. In the absence of regular aeroplane wing “dope,” the muslin cover may be coated with starch, which will require renewing at intervals of several wecks. ‘The two outriggers are now bolted to the upper side of the rear wing beam, and the two rudder braces, shown at the rear, which complete the rudder frame, are at- tached, and reinforced inside the corners with .corner braces, as indicated in the detail drawing. The rudder section thus formed is covered with muslin on both top and bottom, instead of only on the top, as in the case of the wing. The two vertical pylons are attached to front wing beam with bolts, as indi- ted, and are fitted at the bottom with brace. The two diagonal outrigger races are next bolted in, one end to the triggers, and the other to the lower ls of the pylons. These braces cross the center, where they are bolted to- ther, further bracing being thus elimi- ited. In the angle formed between the pylons and the outrigger braces, the rosspieces that form the arm rests are tached, so as to fit under the armpits of the user, the location and size of these ces depending to a great extent upon the convenience of the owner. ‘rom the upper ends of the pylons, the ug-bracing guy wires extend to near wing tips, where they are attached to the front and rear wing beams. As shown in the detail, metal clamps made from light-sheet metal are provided at the upper ends of the pylons to prevent the wires from slipping. Similar guy wires also radiate from the lower ends of the pylons, to the same point on the wing beams as the upper ones; both sets are secured with the same bolts. Short horizontal stay wires, between the pylons at both ends, prevent their spreading apart. As the dihedral of the wing is formed by the tension of the upper guy wires, considerable care must be exercised in cutting the wire to the proper length, so that when bolted to the wing beams, the proper elevation of the wing tips is ob- tained. All guy wires should be of ¥%s or ¥%-in. wire, the woven-cable type being preferred. The ends of the wires are formed into long loops with a hook on the end, the wires being bound together with a wrapping of fine wire. The wires should be pulled tight, and cut to the exact 953 length; perhaps the easiest way of doing this is to fasten the end of the wire to the pylon, mark on the wing the point where it will be bolted, and then cut it to length. Form the loop at the end, leav- ing it slightly short, so that when the bolts are tightened, the guy will be stretched taut. The glider is now ready for its trial flight. With a glider of this type, great skill is attained with but little practice, and there is little or no danger of acci- dent, providing the user exercises caution in gliding until he has acquired the knack of handling the machine. It will fly level at 12 to 15 miles an hour, and will sup- port an adult, if pulled by two boys into a 10 or 12-mile an hour breeze. With a little practice, the builder should be able to glide several thousand feet, or even a mile or more, into a slight breeze, after jumping from some elevation. MATERIAL LIST wing braces, 1 by 1 in. by 4 ft. wing beams, 1 by 1% in. by 13 ft. > wing ribs, % by % in. by 6G ft 2 outriggers, 1 by 1 in. by 8& ft outrigger braces, 1 by 1 in in. rudder braces, 1 by 1 in. by 5 ft. 10 in. pylons, 1 by 1% in. by 4 It. pylon brace, 1 by 1 in. by 4 ft. arm rests, 1 by 1% in. material % yd. unbleached muslin, 1 yd, wide. 200 ft. Si¢-in. guy wire. 4 metal corner braces, % by 1 by 83 in. Solts, %6 in. up to 3 in. in length, Shingle nails, tacks, thread, starch, tin strips fine wrapping wire 1% in. by 11 ft. 64% Fastening Contents in Mailing Tube One of the simplest and safest means of fastening the contents of a mailing tube, to prevent them from sliding out, is to run one of the commonly used brass paper fasteners through both tube and the sheets within it. This. method is hardly advisable when the con- tents of the tube are photographs or other articles which would be marred, but is excellent for sketches, blueprints, drawings, and printed matter which will not be damaged by the small perforations made by the fastener. Should longer fasteners be available they can be run at right angles through the tube ends. @About 150 Ib. nitrate of soda to the acre will kill moss on meadow land. MAILING TU FASTENER

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954 Flower Box from Log A rustic flower box can be qutckly made from a split section of log, as shown A 2-ft. length is sawed in the drawéng.

POPULAR MECHANICS

Hollowed Logs Make Pleasing Containers for Display- ing Fiowers and Plants on the Porch from a log, and split in half. The interior is hollowed out with a sharp chisel, leav- ing a wall about 1 or 1% in. thick on all sides. Holes are drilled at the corners for wire loops, by means of which the box may be suspended by wires, or chains. In case the bark shows a tendency to peel, it may be held in place with small nails. Larger boxes may be made and provided with wooden supports for the porch balustrade, or floor.—Dale Horn, Lincoln, Neb. R, Van Motorcycle Needle Valve Made Adjustable There are few motorcyclists who have not felt the need of an accessible car- buretor needle-valve adjustment on their machines. To adjust ordinary needle valves while the machine is in operation on the road is virtually impossible, and an adjustment secured while the motor is running with the machine stationary does

not produce the results desired for road use. These adjustments, in any event, THUMB SCREW — = —< , FUEL TANK Brass / Ty \ TUBE 7 th / i #4 SPOKE | in S| Oh FUEL a } SOLDER TANK a u-sHaPEeO -A~A--—-f — ti FORK ORK Jee oe STEEL | PIN } YX “= carBuRETOR ed BOWL

Dicniamenioccipdiets vine %, Means of an Extension Run Up through the Fuel ank, the Needle Valve is Adjusted on the Road

are usually secured at the expense of searing one’s fingers on the cylinders o a hot motor. To eliminate these troubles the devic illustrated was contrived, by which th: carburetor is adjusted while riding. <A piece of hollow brass tube is passed through the fuel tank and soldered place, as indicated; and through this i fitted an ordinary motorcycle spoke. T upper end of this spoke is fitted with knurled head to serve as a thumbsc and the lower end engages the carbur needle valve by means of a fork or bail With this arrangement completed, it obvious that a turn or two on the knurl thumbscrew adjusts the needle valve to permit the flow of more or less gasolin as desired, thus making the proper justment of the carburetor one of ex treme ease and simplicity—John Edwin Hogg, Los Angeles, Calif. Taking Care of the Reproducer on the Phonograph Few phonograph owners realize the im portance of the reproducers on_ the machines, though without these delicate instruments the remainder of the mechan ism would be worthless, so far as the production WAX OR —— CELL CEMENTS, of sound is con- DIAPHRAGM cerned. Conse- quently, they / NEEDLE BAR should be care-

fully adjusted to on er obtain the best re- . c e NEEDLE sults. f WASHERS | eos An ordinary re- cmmene an producer is com- posed of four essential parts: the cell, the diaphrag the needle bar, and the needle. The c¢ usually is made from aluminum, but othe light metals are also employed. Even slight projections inside the cell have a tendency to retard, or distort, the sound waves, and their removal is advisable l‘or this, some sharp instrument shou! ve used, followed by emery paper, The diaphragm, or vibrating disk, is made from mica, hard rubber, or other similar material. If the diaphragm is cracked, it should be replaced by a new one. All flakes should be removed from its surfaces. In case the rubber washers which hold the disk in place have become hard and unyielding, they should be dis- carded, and new washers, or substitutes made from thick felt, inserted in their I smoothing with

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POPULAR The retaining ring should be place. screwed down tightly to hold the dia- phragm firmly between the washers, as a loose disk causes the machine to rattle when it is played. he needle bar is attached to the edge of the cell by trunnions, or pinned through a clevis. Any looseness at this point should be taken up by turning the screws, or nuts, provided for that purpose, but care must be taken not to bind the joints, as this will reduce the volume of ne, and will eventually injure the bear- rs. A drop of oil on the latter will rove beneficial. fo remove the needle bar from the diaphragm, to which it is attached with or cement, a lighted match is passed ver the connection until the material be- ymes soft. Chewing gum or shellac can be used to reattach the bar, though these ire only temporary substitutes for wax cement. It is important that this connection be firm, to prevent rattling. lf the threads of the knurled screw on e needle holder are worn, a new screw ould be substituted, or the holder re- tapped. Steel needles should never be d for more than one record, and no ittempt should be made to employ rusty needles, under any circumstances. Long edles, which produce soft tones, are preferable to short, loud-tone needles. To Lock the Screen Door \ screen door which is fastened’ by an linary hook and screw eye is not al- way.s proof against being opened by passing a piece of wire through the meshes of the screen and lifting the hook out of the eye. Prowlers an be prevented from opening the door by turning the eye over as shown, after the hook has been adjusted. Even turning the eye to a vertical position is generally uthcient to prevent the hook from being raised.—Carl E, Freeman, Carrizozo, N.M. ibe! rity. ity Mi if EVE TURNED Simple Ruby Lamp for Photographers A very -effective and simple dark-room lamp, which can be stored in a small space and is very light, is made by sew- ing a square of ruby cloth into the form of a bag, with a piece of elastic around the mouth. To use, it is only necessary to stretch the elastic and slip the bag over an ordinary electric-light globe. MECHANICS 955 Circuits for Three-Way Switches Three-way switches, for giving control of a lamp, or circuit of lamps, from two different points, are most commonly con- —_— — — Scapcemtimeraatt aaa | LAMP LINE { = —_— - _ - o- re ‘liieanieekansenseneaeannn g} 3-WAY SWITCH S-WAY SWITCH S-WAY SWITCH. Varying the Ordinary Three-Way Switch Circuit, as Illustrated, When the Switches Are Some Distance Apart will Save Wire nected as shown in the upper diagram. A variation of this, illustrated below, will be found to save wire whenever the two switches are situated far apart with the lamp between. The use and effect of the switches is the same as in the ordi- nary circuit. Easy-Chair for Camp Comfortable chairs with back supports are usually lacking around the average camp, but the drawing shows how a thorough- ly comfort- able seat may be made from a sin- gle strip of can- vas, or other strong cloth. The canvas is used in the width it comes from the store, and should be 5 or 6 it. long. Eachendis [4% a turned back about \canvas \ My 3 in., and sewed, sorerr. \ \ LONG be making a hem through which the g ec. _ GROOVE wooden spreaders GQ CUT AT ENDS are inserted. OF SPREADERS These are made of any strong wood, and have grooves cut at the ends to prevent the supporting ropes from slipping off. As shown in the drawing, the chair is suspended between two trees, by ropes attached to the ends of the spreaders. @Dry chloride of lime, scattered around and into rat holes, will keep the rats away

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POPULAR Portable Springboard Three boards, bolted together as shown in the sketch, make a springboard which The Joys of ‘The Old Swimmin’ Hole” are Increased by a Simple Springboard Which can be Taken Apart in a Few Minutes can be moved to any point desired, with little trouble. The springboard proper should be about i0 or 12 ft. long, and the lower board should be about the same length. The front crosspiece should be made quite long, to prevent any tendency to tip over. The boards are bolted to- gether, and the whole arrangement may be taken apart in a few minutes. A somewhat similar springboard can be made by bolting the board to the axle of a pair of old buggy wheels, and anchor- ing the rear end firmly. The wheels are blocked with stones. Row Marker for Transplanting The handy transplanting row marker shown in the photograph makes a furrow for the plants, stirs the soil up at the sides, and marks the location of the next row, all in the same operation. The roller, made from a section of an old rolling pin, is attached to one end of a discarded drip pan with light iron brackets, which are riveted to the sides of the pan. The handle is formed from the leg of an oid washboard. For the row marker, an adjustable curtain pole Convenient Row Marker, Made from Discarded Household and Kitchen Utensils, That Is Valuable for Transplanting in Small Gardens MECHANICS is fastened to the bottom of the pan with a hinge, the adjustment being held by a thumbscrew. ‘The marking disk at th outer end of the curtain pole is merely the head from a tin can, attached with a nail or screw. The final and essenti feature of the device is the metal crow’ foot at the rear, made by bending a pie of stiff sheet iron to form three V-shapi toes, and attached to the underside of the pan. Wing Adds to Surface of Desk Desks that are not originally equipped with the sliding leaves, which are so handy, at the side of the | desk, can be fitted up with a very good sub- stitute at a moderate cost in labor and material. The photograph shows a leaf which is held up by folding braces. The lower ends of these brac« are attached to another board, whi swings on a vertical pin along the edg: at the corner of the desk. To move the shelf out of the way, fold up the brace and let it down against the board to which it is hinged. The two together are th swung around to the side of the desk, where they are out of the way. A Simple Arrow Gun Every boy is familiar with the well- known sling shot; the drawing shows a somewhat similar “run,” for shoot- ing arrows instead of pebbles, or marbles. The fork is cut from a green limb, and should have a spread of about 4 in. The tops of the forks are cut off smoothly in a straight line, and a screw eye is turned into each branch. To operate the gun, a heavy rubber band is slipped over the screw eye nearest the marksman, and an arrow, made of a thin strip of hard wood, is slipped through both screw eyes with one end against the rubber band, FORK CUT FROM “~ GREEN LUMB HANDLE

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POPULAR as shown. Both the elastic band and the arrow are gripped between the thumb and index finger. Pull back the rubber band, take aim, and fire by releasing the grip. he arrows will- carry better and farther if the heads are weighted with a small 1 tack or brad. To Catch Flies on Ceiling Flies that take refuge on the ceiling, at night or in cool weather, may be cap- tured without difficulty. The handle is sawed from an old broom, and a tin lid is attached to the end by driving a large ck through it into the stick. The tack hould be driven firmly, to make the lid t solidly and prevent leakage. The lid partly filled with kerosene, and is held for a few seconds against the ceiling, di- ectly under a fly. The insect, becoming re or less stupid with the cold, will be. further stupefied by the fumes of the ind will drop into the lid. Repairing Umbrellas with Hairpins ‘ken-down. umbrellas may be re- red to usefulness by mending broken bs with hairpins. As most umbrellas are incapaci- BREAK OFF HERE tated 7 came rusting and /, — breaking off at the point RIB PINCHED :\ TO HOLD HaIR- of attach- | YR Pine pu aces ment, the best repair is made by replacing the broken ribs with new - ones. How- ever, satisfac- tory repairs can be made by using hair- pins. The broken end of the steel rib is broken off, just back of the eye, and the groove in the rib is opened out at the end. A hairpin is passed around the wire which holds the ribs in place, and twisted as shown. The twisted hairpin is inserted in the groove of the umbrella rib, and the walls of the rib are then pinched or ham- mered down tightly, to hold the hairpin im position. In case the groove of the umbrella rib is too shallow to hold the twisted hairpin, only one side of the hair- pin is incased in the groove, the other half being wrapped around the outside of the rib, as shown in the drawing. A \ TWISTEO HAIRPIN TO BE INCASED IN GROOVE OF RIB oe ONE SIDE OF naIR- PIN INCASED IN RIB OTHER WRAPPED AROUND MECHANICS 957 Clean Spring Water for the Camp Wishing to keep the drinking water as pure and clean as possible, the director of a summer camp devised the plan shown — — pe ae a Water Piped into a Wooden Hopper from a Spring bove Furnishes Campers with Clean, Pure Water without Danger of Pollution in the drawing, the main feature of which is that it prevents the campers from dipping unclean vessels into the spring and the accumulation of trash, leaves, and the like. The spring was entirely covered, and a pipe run from it to the wooden hopper located at a point below. The hopper was first made and hung between wooden supports sunk into the ground, as indi- cated. Holes were drilled at the same distance from the upper ends of the sup- ports through which large spikes were inserted and driven into the sides of the hopper, to form axles or trunnions. These axles were attached well above the center of gravity of the hopper, to prevent the weight of the water from overturning it A-handle was nailed to one side, and V-notches were cut into the front and back edges so that, when the handle was pulled, the water ran into the container in a solid stream. A box to receive the overflow and a trough to carry it off prevented the formation of a_ puddle around the hopper.—Roy B. Miller, San Francisco, Calif. such as To Prevent Milking Stool from Slipping To prevent a milking stool from slipping, its legs should be equipped with spikes. This is accomplished by driving a good- sized nail, or spike, into the lower end of each leg, allowing about 1% or % in. to project. The heads of the nails are cut off, and the nails sharpened to points with a file.

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958 POPULAR Folding Table from Broom Handles 3room handles form the support for an easily constructed card table, which re- BROOM HANDLES LONG SCREWS FOLDED Broomsticks Form the Base of a Substantial and Economically Constructed Folding Game Table quires six such handles and a board of the desired size for the top. The legs and braces are drilled with %e- in. holes, and long wood screws are used to hold them together. One side of the top is attached to the base, and a cleat at the edge -f the table fits over a cross- piece when the table is opened. Whether the top is made of one or two pieces, bat- tens should be provided on the underside to prevent warping. A Trap for Troublesome Wasps An excellent wasp trap may be made from an old flowerpot, a water tumbler, and a saucer, as indicated in the drawing. The flowerpot is inverted and ele- vated from the ground on small blocks, or stones. The glass tumbler is set over the drain hole in the bottom of the pot, and a saucer con- taining. sugar, sirup, or other bait is set under- neath. When the wasps have par- taken of their free lunch, they rise toward the light, entering the hole in the pot, and fly into the tumbler, from which they are unable to escape. When a sufficient number of insects have been caught, a slip of cardboard is inserted be- tween the bottom of the pot and the MECHANICS: tumbler. Holding the cardboard against the mouth of the tumbler, the latter j immersed in water, the card removed, a: the wasps are drowned. Mud Scraper on Shoe Brush A small piece of flat metal screwed the top of the shoe-polishing brush, that one end extends beyond the ed about 4 in., will be found useful for r moving the covers from cans of po! ishing paste, as well as for removii mud from ‘between the soles and uppe: parts of the shoes—H. C. Kihlstrom Chicago, IIl. Unbreakable Kerosene Lamp A rural dweller broke the oil fount oi his kerosene lamp, which meant he wou! have to make a long trip to the nearest store, or do Tryrrt hn \ BRASS COLLAR FROM BROKEN . . LAMP without light. In a the emergency he obtained an: ordi- arv icti FRICTION nary friction-top (TOP ca tin can, and cut a =~ hole in the center of the cap to fit the brass collar of the ne broken lamp. This brass collar was removed from the ‘ SOLDER old lamp by gently tapping it until the plaster cement, ho ing it in place, loosened. The collar w placed over the hole in the can lid and curely soldered. The lid was placed ba on the can and soldered all the w around, to prevent leakage of oil, and tin handle was soldered to the can, convenience in carrying. When the ca was filled with oil and the burner screwed on, the result was a thoroughly satisfa tory and unbreakable lamp.—R. A. Var stone, Assiniboia, Sask. White Borders on Photo Prints Photographic prints can be provided with white borders by a very simpli method. A ruler, or pasteboard card, is placed on the picture, its edge the prope! distance from the edge of the print, and an ordinary rubber ink eraser applied to the exposed portion of the latter, until the emulsion is removed, uncovering the white paper underneath. This treatment is especially suitable for prints that are trimmed before being pasted in albums. —F. T. Lesser, Ridgway, Pa.

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OPPORTUNE ANNOUNCEMENTS this page are condncted, by a st jot } nam and addre | ‘ ‘ . n Industrial addresses will not be. published. but iy b tained from our Burea f inf i i t. m joning the ti f the article and da , iblica liditor LARGE NUMBER OF PRIZE CONTESTS \ \ I ent t us ! 1 t A ‘ ' , j stior j OPEN TO AMERICAN FLIERS peep ne Phe neg BR nny agp may Bi aaa P sed by the int t to ter qunte it I this year. The com ( f America are New York and Paris planes, May 2 )" | flight $50,000, t cor rress M t ntwerp i July, for King 1! y and $100,000 i prizes ' yt le at { £5000 o : ' ' The Box Now Used is Seen Closed at the Left, and in Process of ! y yt sus » I Opening at the Right 1 mitest af Frances 1 xt SC] | ] present bo are equipped { ) ! 1 fixed ¢t } f the ying trophy contest in Italy t its operat not entirely satisfactory $5,000 first 4 ze Los Angeles next fall, $25,000 to AMERICAN PLANES TO RACE AT 200 M.P.H. we nd the world, $1,000,000 for FOR INTERNATIONAL AIR TROPHY I , Cha ] t t ] Gordo ! yy across the United Stat bra iat | Ra t win : tember , ne her: three a tiv vict contest, $2.000 a Poe P ; » A, per I f prized cug tect i America next i f prey ext | . ‘ S100 000) ] to j t tre yn petiti may | ta 1 f 9 , ' “ init to have . a, oes lad ' T ri 1 sy f ‘4u) i l oth will ) if ! il, and manutac , and will be m in pilots \merica PAPER ABOUT ATOMS AND ELECTRONS not alone n ent ism f victory, however WINS CHEMICAL-SOCIETY MEDAL caehan Me ae ait eae ae oe 7 est le ers ot he co r ior f cuy V , tar hich the subject of aton ‘ Interr onal rivalry i kees The situation i present day scientin« t idy is xpla d by 1 ult i prev "W meet Phe t nt iward of th \mericat p wa wor i tou will be remembered by annual gold medal for i pape \mer 1; in 1910, by England in 1911, by An 4 ment of Electrons in Atoms { W412 ar ELD Bs y I I tl Dr. Irving Langmuir ; pr le Seti Pact HUGE PRIZE OFFERED TO AIRMAN WHO entral OSItIV ectr . o —Ar tive ele : ns Conceiv ACCOMPLISHES DIFFICULT FEAT le in diameter, ¢ h elects a i j iful airplar pilot is going to t 1 size, and the positiv ¢ f4 n 1 val of $200,000 Init | C ir 92 kind 1 } ] ! to } ind of el ) ‘ il t t ' j | Ve . a 1 Ik 1 n | 1% \ i t it { DEAS FOR MAKING AIRPLANES SAFER 125 mile fe f land HAVE CHANCE AT BIG PRIZES to de ; 1 (nn) 1 ' j i +} 1" « I t 1 ) \ ypla | Pp I . mipetit ame . ft ; THE TELESCOPE ' ’ 1 fo SO°O0O0O0 ; 1) o | I l Y ( | ® i } ‘ SLOCMHD 7 ) » 1 | 1 191 lif I had t of 0 THOUSAND DOLLARS FOR DEVICE ne f TO OPEN SHOE-POLISH BOX () tit ‘ ] ! ! at 2 kno ‘ ul ! : po t ' ” s in litt tir Of tid t not gardi: the openit f ti \ n t a problem Qne manufacturer | | ! 1 tow } mmodity is offering a reward of $1,000 I i os lows ’ ice, in ft hape of an at hment for eacl : ns t 1! ihle tl istomer to pry the lid off Perhapst T kt not what the y may | t ] fact that tl | t t nai I I 1

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960 POPULAR The Finished Rifie Range, with the Targets in Their Own Pit in the Distance, at the Left, and the Rifle Pit, Boarded Up, Except for the Firing Window, at the Right MECHANICS SIMPLE RIFLE RANGE IS ACCIDENT - PROOF QUTDOOR rifle practice, one of the most desirable forms of amusement for boys, is invariably viewed with ap prehension by the neighbors, whose fear is often so great as to forbid the exer- cise except in some distant woods or field. A young Illinois marksman, only in his twelfth year, has met this condition with a design so effective in removing all danger that his system is likely to be adopted by many amateur shooting clubs. Not only is the range as laid out by this method accident-proof, but its cost is within the means of almost any group of young enthusiasts. The principle of the range is that all shooting is done through a tunnel under the ground. Without further explanation this sounds not only expensive and hard to build, but not at all the light, open-air affair a natural range should be. But as the description progresses, it will be seen that all these desirable features are pre- served, and much gained in addition. Every good range should have a rifle pit anyway, and this one is dug 7 ft. deep. Then a long trench is dug from the pit out into the field. at least 50 ft. It need not be very deep or very wide, but shoul: be boarded up on all sides and the to) except at the distant end, which is let open for the targets. When the boarding, which may be of rough or discarded lum ber, is complete, leaving a height of about 2 ft. inside, the top is covered with eart! and sod. The open end, at the target is fitted with a trapdoor, and when this opened and thrown back, the targets a: as light as open day. The trench side of the rifle pit is boarded up too, exce for the firing hole. The energetic work of a small grou; of boys should accomplish the construc tion of such a rifle range in a few day and $100, or even less, ought to covet the cost. @ Millions of “skimmer” clams, toug! unedible, and worthless, were tossed upoi the shores of Long Island by recent storms. Before the task of removal was undertaken by the local health depart- ment, they lay along the sand in pile one to three feet high. TRAPDOOR OPEN WHILE SHOOTING, GIVES LIGHT ON TARGETS —> bes WL eee ee de de eeeeEEEEEEE MEE EEE EXE EEE. EZ. | FIRING 2 TUNNEL TARGETS ---—- + e PIT f ~ sewn 3-2 -------------------- SO FEET --------- ' Diagrammatic Section along the Line of the Range, Showing the Covered Trench That Cor stitutes the Tunnel, the Firing Pit at the Left, and the Open Targets at the Right IN accordance with the editorial policy of this magazine never to accept compensation in any form for what appears in our reading pages, and also to avoid all appearance of doing so, we are obliged to omit the name of the maker or the seller of —oe described. on file and will be furnished free, by addressing Chicago. [Editor.] This information, however, is kept ureau of Information, Popular Mechanics Magazine,

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POPULAR MECHANICS ADVERTISING SECTION RAKE’S hecianicat BOOKS They Will Raise Your Pay— ORDER ON 5-DAY TRIAL books listed below will perfect you in your chosen trade— pave the way to obtain the big ions—the fat pay envelopes. Written in non-technical language—-easy to read—easy to erstand. We will send any book postpaid — you benefit five days—if not entirely satisfied im the books and your money will be refunded in full. Order direct from this page. . , . Electrical Books The Parents’ Library (Leatherette Bindings.) A new series of Practical Books on the Alternating Current $1.75 | Care and Culture of the Young, pre- Electric Motor Control Systems $1.75 | pared under the editorial supervision Wiring Diagrams and Descriptions $1.75 | of Professor M. V. O’Shea, Brot essor Electrical Tables and Data .... $1.75 | of Education, the University of Wis- Armature and Magnet Winding $1.75 | consin. f.very parent should havethese Modern Electrical Construction $1.75 | books. Bound im cloth, 250 te 300 pages each. Modern Electric Iumination --$1.75 | First Steps in Child Training, Electricians’ Operating and Testing by O'Shea $1.50 Manual : .- $1.75 The Trend of the Teens, O'Shea $1.50 Drake's Electrical Dictionary -$1.75 | The Faults of Chik thood and Youth, Electric Motors, Direct, Alternating .. $1.75 O'Shea $1.50 Electrical Measurements and Meter Everyday Problems in Child Training, C Drake's Telephone Handbook $138 | pote — ake s leiephone Mandboo . | Putting Young America in Tune, Carpentry k —— Arve | Telephony Coit '§ ‘| by Wy > nah $1.50 Easy or al E-xperiments oth $1 | Home Guide to Good Readin and Building Boo s Wireless Telegraph and Telephone D. H. Stevens ot os $1.50 itry, 2 vols.. a loth $2. 50 Handbook Cloth $1.25 The P’ roper Feeding of Infants, 2 vols Cloth $2.50 | Telegraphy Self -Taught Cloth $1.25 | W. H. Galland, M. D 1.50 tar ‘d Shi building, C loth $1.50 ° . Diseases of Infancy and ( hildhood, mator and Ce ma | Guide Steam Engineering Galland $1.50 oy Cee ©. . B k Maternity and Infant Care, Galland. ..$1.50 tHieavy limber Framing ‘ot OOKS . Architectural Drawing. Cloth $2 | General Instruction h $1. 50 | Swingle’s Handbook for Steam Engi- Bungalows and Pe neers and Electricians. . Leatherette $3.50 and Reference Books Cloth $1.00 | Complete Examination Questions and low t American Homes Answers for Marine and Stationary Practical Bricklaying, Self-T aughtCloth $1.25 — $1.00 Engineers Leatherette $2 | PracticalStonemasonry,Se!f-Taught,"* $1.25 . | Steam Boilers a Leatherette $2 j yactem. U » Date Plumbing. ¢ pe 3} .50 M4 S le’s Catechisi d Steam. Gas nd Hot ater eating jot 1.50 Shop Practice Books | me ret Ae l gro conti $1.50 | Practical Handbook f: ou Millw Pe Cc ‘loth $2 tal W .~ rs’ Manual, Leatherette $2 | P pa e B k peat owe Se hemistry, rs Taught, a viene Weld Complete Courses in Civil Service.Cloth $1.50 : md ainting Books | Standard Cyclopedia of Recipes. Cloth $1.50 icksmithing k ae, by .25 | Scene Paintingand Bulletin Art. .Cloth $3.50 | American Star Speaker ..Cloth $1.50 h vactice....... oth $2 | A Show at Sho’ Cards..... Cloth $3.50 wing and was E Sign Painting ; Cloth 33: 50 | New Modern Language g Cloth $2 | Strong's Book of Designs. . Leatherette $3.50 | Making Leatherette $1.50 | Signist’s Alphabets _.Cloth $1.50 | Books | Modern Painter's Cyclopedia. ..Cloth $1.50 . . F M h . | Automobile Painting Cloth $1.25 By Prof. P. S$. Allen, University of Chicago. arm ecnanics | Estimates, Costs and Profits, House Painting | French without a Teacher Cloth $1.25 1 Mechanics ° Cloth $1.25 | and Interior Decorating Cloth $1.25 | Spanish without a Teacher Cloth $1.25 Buildings Cloth $1.25 | New Hardwood Finishing Cloth $1.25 | German without a Te acher.. . ¢ loth $1.25 rm E:ngine ° ..Cloth $1.25 | The Amateur Artist .. Cloth $1.50 | Everyday French Easy Conversation) $1.25 act Farming Cloth $1.50 New Stencils and Their Use. . Cloth $1.25 | Everyday Spanish (EasyConversation) $1.25 SEE ALSO OUR OTHER AD ON PAGE 8: Order direct from this page—on our Money-Back Plan ses catalegus, Walch son Will’ necgive nocepily ates —— rasan & - utand mailing us the atteched coupon. For quic! k 1008 michigan nai Chicago, Il. GENTLE MEN Please se which lists . o 1 catalogue econ illustra’s Mechanica rder direct from this page= cross name of each k wanted and sendin with the price quoted, We pre. ostage and send the books on our money-back plan, FREDERICK J. DRAKE & CO. | PUB LISHERS 1 Practica your t ee, postage paid, a ee a describes over Study. | Bow 1008 Michigan Ave.,Chicago Drake Books Are For Sale at All Book Stores. My name ts and my address Mail Coupon For Free Catalogue Your Guide to Home Study

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POPULAR MECHANICS LEARN THE AUTO- MOBILE TRADE at home—spare times WITH Dyke’s Working Models and Simplified Instructions Don’t Delay Write Today Now! On these models you see the actual operation and learn more than you could from the auto itself — it’s easy and quick. An Auto Repairman is not a machinist— his work consists of ad just- ments and re fitting worn parts; “knowing the principle,”’ that’s the thing. IF we PROVE to wou that students who took our actively engaged in bust admit vou in do the same, (‘ou wre now ness — you nust se SSSSSSSSSSSSS SSE SSS ER SSESHESE TEES TEER ESSE WRITE NOW For Dyke’s FREE 32-Page Booklet It is interesting and instructive in iteelf. Learn how you can get all this training for only $18 The knowledge gained willbe worth a hundred times ite cost. Fill out below or write a postal —bat do it new, Box 198, Granite Bldg., St. Louis, Mo. Send me your free S2-page booklet about your New Idea Working Model Course and testimonials and proofs. It is un- lerstood | am under no obligations in sending for thie OPPORTUMITE DORERD ccccccccccesosccesoccegsecontacooscconceseccscoonoesoescosoceses Warre PLam DOWD .ccccovccccoccnscccccccccececeoccccesesscoss Gecceesesonsececoses BOP OSE. 0c cv ccccccccccccccccesccccctces seccecece BOOS. ccccccccesceses This school is a department of the firm A. L. Dyke, Publisher and tm orter. Dyke's ey stem s endorsed by teadin ane tor authorities of the world Dyke's Books are used by leading Auto Schools of U. 8. and Canada. Contractor to the Government during the war. You will understand ALL Electric Systems — 6, 8,12 Cyi.— Aero, Truck and Tractor Engines when you complete this course. There is a Which can unlock the chambers of success; can thr wide the doors which seem to bar men from the treasure house of naturc; Secret ow 1e¢ enough to we own judgment. to be too good to be true, but when you remember that by the touch of a button or the turn of a lever, science has placed a!most infinite resources at the disposal of man, it is evident that there may be stl other resources not genera!!y known, but which con- tain even greater possibilities. One writer says: the Master Key and with it each dayam unlocking the storehouse of wisdom and suc- cess of which I was heretofore utterly ignorant.’’ Another says: The Master Key is too modest a title for such a stupendous revelation.’’ If you wish to add an asset of inestimable value to your résources, get the Master Key. It will be sent with- out cost or obligation of any kind. CHARLES F. HAANEL 210 Howard Building ST. LOUIS, MO. “I have found | Master Key it is for those who are | wise enou;h to understand, broad | vh the evidence | and firm enough to follow their | This may seem | | | | | | AVVERTISING SECTION (Contents—Continued from P: ape 4 } Piston Pin, Soft Heads on 9 Porch Railing, Shelves Built in — Rack and Lock for Garden Tools = Reamer, Rotating Disk, for Rough Bori - Rope, New, Straightening : Rowboats, Frame for Painting Saws, Gumming with Reamer Screen Panels Held Securely Screwdriver, Angle, for Tight Place : Segments, Boring and Calipering Sewage Disposal System for Summer C Shaper, Tapered Work Held in Shovel Harvests Cabbage Soil, Potting, Ash Sifter Prepares Springs, Oval or Flat, How to Make ‘ Steel, Coppering Solution for Marking , Stereotyping Outfit for Small Newspaper §S * Strainer, Installing in Hand Pump Straw Hat, Clamp for Drying Swimming Pool, Modern Back Yard ) Table for Use in Automobile P Tank, Cooling, for Water Systems Tire Pump, Auto Wheel Operates Tire Theft Protector, Electric 128 Tubing, Brass, How to Make Smaller 97 Valve Grinder Made from Auger 3 Watch, Old, as Speed Counter Water Ileater, Gas Burning Instantaneous } Wheelbarrow from Hot Water Tank 24 Windmill Sign Made from Bicycle 12 Wood Bending and Forming 32 Wrench, Eccentric, for Stud Removal 123 AMATEUR MECHANICS Sait, Live, Kept in Fresh Water 4 Baskets, Fruit, Handles for 5] Bicycle Repair, Emergency 044 Boxing Practice, Ring for 95 Camp, Clean Spring Water for 57 Camping, Auto, Fire Irons for 148 Chair, Easy, for Camp..... 955 Desk, Wing Adds to Surtace of 5 Drill Made from Wire Nail 4 Electric Light, Circt for Three Way Switches f 55 Envelope Moistener, Wide Mouthed Bottle Ma 4 Flies, Catching on Ceiling ase Box from Log Foods, Copper Salts Detected in jlider, How to Build for Ten Dolla Fay Air, Loader for Gun for Shooting Arrows Hacksaw, How to Run Straight Hanger for Hat and Coat Ice Chopping Tool, Handy Ink, To Make Indelible Lamp, Unbreakable Kerosene Matches, Removing from Holder Motorboats, Hanging Shelf for 4 Motorcycle Needle Valve Made Adjustal Mud Scraper cn Shoe Brush Penknife Made from Cartridge Phonograph, Taking Care of the Reprodu Photograph Prints, White Borders on Photographers, Simple Ruby Lamp for Photographs, Toning to Sepia Photography—Print Washer for Camper Plant Stand, Tree Trunk Makes Plug Attachment, Handy Temporary Poultry Cleaners’ Table, Wheel and Barrel Ma Pump, Spray, for Liquid Fire Reel, Fishing, for Youngster Row Marker for Transplanting - Screen Door, How to Lock ° Shoelaces Secured without Knots Springboard, Portable Stand, Reading, Adjustable Stool, Milking, To Prevent from Shipping : Stopper, Spool, for Glue Bottle +5 Swirg, Porch, Ball Bearing Table, Folding, from Broom Handles : Table, Lawn, on Tree Stumps Tennis Court Skinner Tents, Portable Camping and Sleeping 4 Tube, Mailing, Fastening Contents in ae Type, Rubber, Inner Tube Makes : Umbrellas, Repair with Hairpins - Wasps, Trap for - Well. Double Chains Raise Piping from ; Wood Inlaid Work, Imitation

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POPULAR MECHANICS ADVERTISING SECTION Get Bigger Pay ‘¢, LLECTRICITY You need specialized knowledge today if ere 1s you are to master electrical forces and

command the high salary of an electrical expert. Success in electricity will come { through your ability to acquire and use the specialized knowledge of others knowledge collected and condensed in Q Hawkins Electrical Guides. : Just think how much these books will ‘ help you. In Hawkins Electrical Guides 2 you always have at hand for immediate - reference or study, a wonderful work containing 4,700 illustrations and 3,500 pages which cover all the subjects, princi- ,; ples, theories, practices, problems, troubles 51 and ways of doing things electrically. 950 The set contains ten wonderfully helpful 048 J and practical volumes— written in clear, concise 55 “ language — easy to understand —no wasted words y —full of up-to-the-minute electrical knowled a rwe @ 4 which you can apply to the problems that come uy Do you want to know the facts about The Guides fit your pocket. You can earry t lollowing electrical subjects? They are a number about with you till you have mas- ed | in Hawkins Electrical Guides. tered its contents. All subjects are indexed goueand symbole—static and current clectricity— pri so that you can find the information in- yr ctors and insulators—resistance and conductivity a aur _ ° luction coile—dynamo principles— classes of dyna stantly. Written in the modern ques * artes icu lations brake botecpeteretelection and imtais, on and answer form. It's like having a famous ~ and motors— galvanometers —standard celis— current measure- electrical authority always at your elbow : inne operstion of motors. Distribution systems wires and wire ready to answer any question you asl ae ey gy tg Oy H THEO t nore ro nthe pow er factor-alter ator prir ciples pen wae ' Shipped to You FREE AUDEL ~ ing - ‘ Motors synchronour arn Dors FH . . & co. ections ts eae eee stir erurrent systems —— =a i = Page _ — 72 Fifth Ave nae I Sees ke -- fees ap some informa i Mehat will tne NewYork,N.Y. s—wave form messureme nt~ switch boards terna ing urrent crenm . bility Decide eee euie a ; etme ee rete test, for yourself the wt thes are the most ee " ss—electric belle—electric lighting ihebaunates Flectric com plete id earl written Mawkins Electrical Aa ae EL ye leetri end wks eve fg ny sy Guides (price $1 each’. catitig clactrie eetding—soldering and” brasite industrial elec, Self but the entire eet is the ie to” ee t ating —electro-therapeutic rays. best bargain Accept this fact v Ing i lete 126-page ready reference index of the complete unusual offer now— mail €1 wit! ne ja i This i nde sx has been planned to render easily ac — the coupon today If further $1 in ormati n contained in the 10 Electrical ides you decide to keey month until eferences. Youfind what you want to kn owtantnaiin, the ooks u can matte aethheusene USE PENCIL 4, 700 Pictures Flexible Covers oni 51" month antil ; 3,500 Pages—Pocket-size a Se USE PENCIL EXAMINATION = > resisence...... COUPON

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5 POPULAR MECHANICS ADVERTISING SECTION UP-TO-DAT AUTO BOOKS COVERING EVERY SUBJECT You can know all about all kinds of automobiles, and everything pertaininy to them, if you will simply get and study these books. No matter what question comes up, what trouble you meet, you are sure to find its solution fully clearly explained. ‘They cover thoroughly all kinds of Ignition, Starting and Lighting Systems, Carburetors, Motors, Magnetos, Batteries, Batt Charging, Battery Upkeep, Care and Repair—everything. A library of comp up-to-date information on the automobile and allied subjects. If youare an auto ownerthink what trouble and expensethis will save you. If you are a Repairman think what prestige m it will give you—‘‘the man who knows’’—and the big tees 8 moneyit willenable you toearn; worth manytimes the cost. «thn j e ° ° ° . a Each book is a high authority, fully illustrated with drawings, diagrams, charts, ete. A fine set of books. HERE ARE THE TITLES: Automobile Ignition, by H. P. Manly, Leatherette. ..... $2.00 Automobile Starting and Lightiog, by H. P. Manly. a - Leathere tte 1.75 Brookes’ Automobile Handbook. = .: atherette 2, The Ford Motor Car, Truck and Tractor, by H. Manly. . Telle All Abe ' a atherette 1.75 ells ut! Startin and Lighting Troubles, Remedies and Repairs, by battery Charging a palamedes Le ane rette 3.00 Automobile Battery, Care and Repair, by H. P. Manly a ~ s SS Vy ¥ Pa 4 ; 4 2 | \ —— Ss == ——SSSSS a .Leatheret te 2.00 ~ Automobile Catechism and Repair Manual. ...Leatherette 1.50 mci | — TIRES ~ Tires and Valcanizing, by H. H. Tufford ....Cloth 2.00 a AND Practical Gas and Oil Engine Handbook.....Leatherette 1.75 ig Automobile Upkeep and ya by H. P. Manly....Cloth 1.50 Motorcycle Handbook, by H. Manly..... .Cloth 1.50 ature Welding and Cain, by H. P. Manly Leatherette 1.75 Yeu: can ow a eluate book, or several, or the entire Library Order on Our Money-Back Plan } ; ‘ TH ei All Drake books are sold subject to approval. Send ke 4 ee remittance for the books you want. They will be sent en! Facasancessssesseasseessre, prepaid. If not satisfactory return in five davs \ iNDBO . . . . Frederick J. Drake & Co. >. and your money in full will be promptly refunded. 1008 Michigan Ave., Chicago, Il!. tentleme Please none yl, V ] bl te k FREE gyn one ae Fe 1, . ruc ills stented 1 %, a ua e oo catalog which liste ar qd descril *. erat Bue Fyaceiees Movkantows Rooks % Our big free catalog illustrates and describes — *, many more very useful books you may want. >. ee, WRITE TODAY FOR FREE COPY .. Also see our other ad on page 5 », FREDERICK J. DRAKE & CO. > iddvess "11008 Michigan Avenue CHICAGO, ILL ** Drake beoks are fer sale at all leading book stores

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POPULAR MECHANICS ADVERTISING SECTION 9 = | Learning Piano is a Pleasure When You Study My Way I'll teach you in quarter the usual time because I make

our study interesting. I use scientific, time-saving nethods ‘which cannot be obtained elsewhere because hey are patented That my system is successful is proved by the fact that » 1891 when I first introduced my original method I was early laughed out of business—yet now I have far more tudents than were ever before taught by one man. Could | have overcome this old-fogey prejudice and enlarged my school every year for over twenty-five years unless my teaching possessed REAL MERIT? I’ll teach you piano in quarter the usual \ag

time and at quarter the usual expense. To persons who have not previously heard of my method this may seem a pretty bold statement. But I have scores of students and graduates in every state in the Union who will gladly testify DR. QUINN AT HIS PIANO-— From the famous sketch by Schneider, exhibited at the St. Louis Exposition. QUINN-DEX years ol wasted save you months and effort. They can be ob tained only from me and there is nothing els¢ anywhere even remotely like them to its accuracy. Investigate without Men and women who have failed by all cost by sending for my free booklet other methods have quickly and easily at “How to Learn Piano or Organ. tained success when studying with me In My way of teaching piano or organ all essential ways you are in closer touch is entirely different from all others. Out with me than if you were studying by the of every four hours of study, one hour oral method—yet my lessons cost you only is spent entirely away from the key and they include all the board—learning something about Har many recent developments in scientific teach mony and The Laws of Music. This is ing. For the student of moderate means an awful shock to most teachers of the this method of studying is far superior to all “old school,” who still think that learn other ind even for the wealthiest 43 cents eact

student, ing piano is solely a problem of “finget there is nothing better at any price gymnastics.” When you do go to thi You may be certain that your progress is at all times ’ * n ac with ‘ est musica! ght of e preset kevboard, you accomplish twice a jay, and sakes all the difference the worl . \ ‘ ndorsed b wt vished “ much, because you understand what you = M) Sone is end tp ey “ster Peng . are doing. Studying this way isa pleasure for beginners tperience er i or young Within f le is I enabl u t | You ad e as , wis iLhin tour lessons enabdie you to play né an s supplied with t «tra charge 4 an interesting piece not only in the orig ipl ranted. Write tod without cost or A , ’ ligation, for 64 ize free booklet. “‘How to Learn I inal key, but in all other keys as well ww Organ I make use of every possible scientific help—many of which are entirely un known to the average teacher. My pat ented invention, the COLOROTONI sweeps awav playing difficulties that have troubled students for generations By its use, Transposition—usually a “night-mare” to students — becomes easy and fascinating. With my fifth lesson I introduce another important and exclusive invention, OUINN-DEX Quinn-Dex is a simple, hand-operated moving picture device, which enables you to see, right before your eyes, every movement of my hands at the key board. You actually see the fingers

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POPULAR MECHANICS ADVERTISING SECTION Free Proof Raise Your Pay No matter how much you are earning now, I can show you how to increase it. and in one case as high as $2,000 weekly. ET’S have a little chat about getting ahead—you and 1. My name is Pelton. Lots of people call me “The Man Who Makes Men Rich.” I don’t deny it. Ive done it for thousands of people—lifted them up from poverty to riches. I’m no genius—far from it. I’m just a plain, everyday, unassuming sort of man. I know what poverty is. Ive looked black despair in the eye—had failure stalk me around and hoodoo everything I did: Ive known the bitterest kind of want. But to-day all is different. I have money and all of the things that money will buy. I am rich also in the things that money won't buy — health, happiness and __ friendship. Few people have more of the blessings ot the world than I. It was a simple thing that jumped me up from poverty to riches. As I’ve said, I’m no genius. But I had the good fortune to know a genius. One day this man told me a “secret.” It had to do with getting ahead and growing rich. He had used it himself with remarkable results. He said that every wealthy man knew this “secret,”—that is why he was rich. I used the “secret.” It surely had a good test. At that time I was flat broke. Worse than that, for I was several thousand dollars I have even taken failures and shown them how to make $100—$200, Il am willing to prove this entirely at my risk and expense. in the hole. ] had hope when I put the * about given wy secret’ to worl At first I couldn’t believe my sud den change in fortune. Money actu ally flowed in on me. I was thrille: with a new sense of power. Things I couldn't do before became as easy for me to do a opening a door. My business boomed an continued to leap ahead at a rate that startle me. Prosperity became my partner. Sinc that day I’ve never known what it is to want for money, friendship, happiness, health « iny of the good things of life. Phat “secret” surely made me rich in eve1 sense of the word. My sudden rise to riches naturally surprised others. One by one people came to me and asked me how I did it. I told them. And it worked for them as well as it did for m« Some of the things this “secret” has done lor people are astounding. I would hardly) believe them if I hadn't them with m own Adding ten, twenty, thirty or forty dollars a week to a man’s income is mere nothing. That’s merely playing at it In one case I took a rank failure and in few weeks had him earning as high as $2,0 a week. Listen to this: seen eyes. \ young man im the East had an artic for which there was a nation-wide demand For twelve years he “puttered around” wit! it, barely eking out a living. To-day this young man is worth $200,000. ing a $25,000 home it. He has three automobiles. He is build and paying cash fo! His childre

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1) to private schools. He goes hunting, fish- v. traveling, whenever the mood strikes him. His income is over a thousand dollars a week. In a little town in New York lives a man ho two years ago was p-tied by all who ’ From the time he was 14 he had and at sixty he was failure. Without work— -new him. rk and woked upon slaved as a POPULAR MECHANICS ADVERTISING SECTION 1] practice. Because we don’t use our Wills—because we continually bow to circumstance—we become un able to assert ourselves. What our wills need practice Develop your will-power and money will flow in L> on you. Rich opportunities will open up for you Driving energy you never dreamed you had will manifest itself. You will thrill with a new power a power that nothing can resist. You'll have an in fluence over people that you never thought possibl

n debt to his charitable friends, Success — * whatever form you ith an invalid son to support, want will come a8 easy as 11! “ies a) black A Few Exampies “* °™ before. And those az the outlook was p:tchy J1aCK. P only a few of the things the “secret” } ‘ » » “corre ” ~— ene ; 7 wT) e hon .” 2 Chen he learned the secret. peoinat tamale : z | do cm _ rh ecret” i In two weeks he was In business Amomg over 400,000 users of me ‘i “po, ainet ' wy he wonderful . } e “Power of Will’ ch me ‘ 0k “Power ¢ i] or himself. In three months tu ye LB Los re. Sane vhs o oe ; 1 ° ; . Justice P . 1 ‘ . Ex. ° IS pliant was working night and U. ‘s. ann A.B. a, . B.- How You Can Prove This . elare : Post ter General Britt; Gov, Me y to fill orders. During 9:06 Se ‘General —— at My Expense ’ f area : 1etted me $300 cash IT thin ‘ . med would ever be his. . great beck and would mot be without Send no money—no, not a cent [ could tell you thousands of i: ~y Le. me te oot - > — Merely clip the coupon and mail it e os i e pacoe, So akota. ” . : ct: “ac ’ 7 3 : to me 3 retur mm , By re pv Sag od gi re- nee 1 to do this as I m will- “The beok has been worth more ceive no a pamp ane » OU ae wan Ti » than $15,000 to me.”—Oscar B “secret” told in this wonderful book, tell you the “secret” it- — Sheppard “POWER OF WILL.”

Then you can put it to Would be Werth $ 100.000 Keep it five days. Look it over , p . 2 If I had only had it whe I was . : . . rk and see what it will do 20 years od 1 would be worth in your home. Apply some of its $100,000 to-day It i rth «a in vu > ® OV vou aad ghaes iis ane oa a imple teachings. If it doesn’t show I don’ lai I ake I Taylor, The Santa Fe Ry Milans you how you can increase your in he on t ¢ out the differenc gee lis a ee nd vou’ll } oy W he ol wae now and an income several times sreat. So you ind you ; amazed at the almost instan- =... you've a lot—a whole lot—more to lose than I heous results. , The Will is th “ie £ the brai Mail the coupon or write a letter now—you may ; ie Ul Is the motive power of the brain newer ead this offer awain “Without a highly trained, inflexible will, a iiasitiiah aad man has about as much chance of attaining nee a Lap fn eng ge vreaent edition un 7 moans that by July t or soomer, the success in life as a railway engine has of cross- ing the continent without steam. The biggest deas have no value without will-power to “put them over.” Yet the will, altho here- tofore entirely neglected, can be trained into vonderful power like the brain or memory ind by the very same method—intelligent exercise and use. If you held your arm in a sling for two years, it would become powerless to lift a leather, from lack of use. The same is true of the Will—it becomes useless from lack of axed to $4 PELTON PUBLISHING COMPANY 13-K Wilcox Block MERIDEN, CONN PELTON PUBLISHING COMPANY 13-K Wilcox Block, Meriden, Conn. You may gend me * fwil” to remit $39.50 or remail the boot Powe! at your rish { agree to you in five days Name Addre

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12 POPULAR MECHANICS ADVERTISING SECTION Wanted At $1,000 a Month! Can You Fill This Job? N official of one of the largest concerns of its kind in the United States recently asked us to put him in touch with men capable of earning $3,000 to $15,000 a year. His letter is typical of many others we receive stating the difficulty of finding men qualified for big jobs. UR success in training men and women has given us a nation-wide reputation among large business concerns for developing employees for positions paying $2,000 to $10,000 a year and up. Our service has the written endorsement of many leading corporation officials, bankers and business executives. ‘THE practical value of this service has been tested by men holding responsible positions in practically every large corporation in this country, including 364 employees of Armour and Company; 390 of the Standard Oil Company; 811 of the American Telephone and Telegraph Company; 309 of the United States Steel Cor- poration; 214 of the Ford Motor Company; 303 of Swift and Company, etc. HAIGH GRADE positions are always seeking applicants of superior intelligence and train- ing. By our methods we find employees in sub- ordinate positions who need only the special train- ing we supply to make them high-priced men. For instance, we developed a $20 a week ledger clerk into a $7,200 Auditor; a $70 a mont! ship- ping clerk into the Traffic Manager of a big rail and steamship line; a $300 a month accountant into a $70,000 a year executive; a small town station agent into a successful lawyer and district attorney; a bookkeeper into a bank executive,ete. A SHORT period of preliminary training by mail, under the personal direction of LaSalle experts, has been sufficient to increase the earning power of thousands of men from 100% to 600%. TE YOU are really ambitious to place yourself in a position of higher executive responsibilitie: let us advise you how our training and service may be of advantage in solving your personal problem of advancement We have an organization of more than 950 people; financia! resources exceeding $4,000,000 and representatives in all] the leading cities of America, Our sole business is to help men to better positions. MAkk and mail the coupon below, indicating the kind of position for which you would like to qualify. We will send full particulars, also a free copy of ““Ten Years’ Promo- tion in One,’’ the book that has been an inspiration to more than 200,000 ambitious men. Send for your copy now. LASALLE EXTENSION UNIVERSITY The Largest Business Training Institution in the World Dept. 664-R Send me free “Ten Years’ Promotion in One,” also catalog and particulars regarding course and service in the department I have marked with an HIGHER ACCOUNTANCY BUSINESS ADMINISTRA- lraining for positions as Au- TION: Training for Official, i)tors, Comptrollers, Certified Managerial, Sales and Ex- Publie Accountants, Cost ecutive positions. Accountants, etc. Chicago, III. TRAFFIC MANAGEMENT —FOREIGN & DOMESTIC: Training for positions ar Rail- road and Industrial Traffic Managers, Traffic Ex perts,etc. = AW: Training for Bar; LL.B. Degree. COMMERCIAL LAW: Reading, Reference and Con- iltation Service for Business Mor BANKING AND FINANCE: fraining for executive posi- ‘tions in Banks and Financial Institutions. Name BUSINESS LETTER WRIT- ING: Training for positions as Correspondents, Mail Sales Directors, and all executive letter-writing positions. EFFECTIVE PUBLIC SPEAKING: Training in the art of forceful, effective speech for Ministers, Sales- men, Fraternal Leaders, Poli- ticians, Clubmen, ete Address Please Mentic Popuia BUSINESS ENGLISH: Training for Business Corres- pondents and Copy Writers. EXPERT BOOKKEEPING: Training for position of Head Bookkeeper COMMERCIAL SPANISH: Training for positions as Foreign Correspondent with Spanish-speaking countries Vechanics PRODUCTION Present Position....... EFFI CIENCY: Training for Pr duction Managers, Depar ment Heads, and all t desiring training in th« factors of efficiency Cc. P. A. COACHING FOR ADVANCED ACCOUN!I ANTS: Prepares for St Board and Institute | inations,

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POPULAR MECHANICS ADVERTISING SECTION Out af the Fiery Hell af War Comes This Amazing, Vivid, Gripping Chronicle of the Daily Lives of Two Million Yankee Heroes in France. The One Priceless Souve- nir of the War You Will Enjoy and Treasure Above All Others. I is a living, breathing record of the lives ; two million men in war — wriiten by the a 1 , P ; ir n themselves as they fought in France. It ers’ own wonderful story of those days a story that will live forever as the most istorical document ever written. in size and every number exactly as it was printed in France appears in this beautiful bound volume Limited Edition — Reserve Your Copy Now Think of having a complete file of this historic g can give you so vivid, realistic and inti- newspaper, the most unique souvenir of the war! 1 picture of what our soldiers experienced in You will find endless fascination in the many great e as their own remarkable newspaper, the features that an army eagerly re id W algren’s | Stripes, written by the soldiers, for the {4n0us et Se tees Ree eel cage a over there on the battlefields in the thick histories of the Divisions and Divisional mia, etc., et fight 1 All the Overseas /ssues of 7am CheStars.and Sinpes [Reena Behind the Scenes With the American a ved. Place y r orde isappoint ‘in One Complete Bound Volume ead the S t Toetaggoes idl No aay he stars an pes is to live over, in startling reality, those ' - ted tera ie you as eect : . t lumited edition for you and t OU 25 SOON aS IX vith our soldiers in France. It will bringyou face Whe nit reaches your ex u can examine it t ice with actual conditions as they knew them oughly. if you decide keep r express agent the novel life in the French villages, their droll spe a xt t ~ 5 tht pat. he nacho : ‘ that you want » Keep thi enir © . ences with foreign customs, their marches ce and you will not be out one pent r e your ie long white dusty roads, their nerve-tortur- opportunity to secure a compl le of t hestors “ : . im ver aga # this , . riling baptism of fire, their glorious gallantry at paper cert unity — J ag . ms — i e A - e . a “het o.4 3 $ A oupon puts you under no obligation nerely signil , iateau Thierry, Saint Mihiel, Verdun, and their Qecfe to see this great volume — you send not a penny of agnificent drive through the Argonne forest. money just the coupon. Address: Fabulous prices have been paid for single copies EAMES -LUCKETT CORPORA TIS Dept. 76 f the overseas Stars and Stripes. Throughout the Distributors A. E. F. Pub. Asen. . N a CHICAGO, ILL. juntry a tremendous demand has sprung up for 0 ee omplete files of this unique, historical publication, scccesesssesiosorvation Coupen—Mall Vedaysescoscenee Eames-Luckett Corporation, Dept. 76 To satisfy this demand the overseasissues have piseributors A. E. F. Publishing Assn now been bound into one De-Luxe Volume——with 64 West Randolph St., Chicage, Hl. . . . bourne it eeu the @v ~~ turdy, khaki-colored covers — richly embossed — oa are . eo be rk . it in reads, "When it aarives | A ‘ 7 e. A i mark 1 if sat ed all we he express pa oo beautiful lasting edition that you will treasure now Schocotn Vath cetera: ind hand down to your children. -The first issue of . , . N the Stars and Stripes was published February & Sid 1918—the last June 13, 1919. There were 71 issues, Address each paper consisting of 8 pages, 1834x24'4 imches city State Please VMention la Vecha Popu

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POPULAR MECHANICS ADVERTISING SECTION The Shortest, Easiest Prosperity A Subtle, Basic and Fundamental Principle of Success and Supremacy, Gave me a million dollars. to have health and success, the result would come through some element of ease ort “HIS SUBTLE PRINCIPLI i my hands, with or through some mvsterious or mavical sours ‘T it education, without capital, without train result of this attitude on my part was greater we ing, without experience, and without study or waste of time and without healih, vitality or will power has given me the power to earn more than a ° dollars without selling merchandise, stocks, Imtense misery gave me power. s, books, drugs, appliances or any material thing Gradually my condition became worse I re of any character. a degree of miser that seemed intoler es | “d é 1s18 my eC\alization ot my tI Requires no practice. ee ee — erse condition ss le and basic principle of success requires ° ° | pe sobs, no prcee.ee no strength, no ones \ A fight for life. ness, sickness, failure and misery as is always case under similar condition t study, no writin no dietine, no concentration Out ot this misery and failure nd pauperis nd no conscious deep breathin Chere is nothin spirit—out of thi distress—arose withu practice, nothing to study, and nothing to sell desperate reaction-—"a_ fin etiort ve The b Il. through this reaction, arose within me ere is nothing to uy or se covery of the laws and principles of life and basic prine Of success do 5 tion, personality, ! ind, he th, success ind not require that you practice economy or keep re premacy. \lso t of this miser t ords, or memorize or read, or learn or force your the discovery of the inevitable ws and t into any action or invest in any stocks, bonds, of failure and sickness and infet it a gl sages My life changed i d AOR EE aggre y life changed imme Doli. letaphvsies. Psvch vy. Ney hought, Christi Vhen I discovered th | d unconsei Science rhitrary optimism, inspiration or faith employing the principles of failure and sick: \ one has et immediately began to use the principles of eded n gaining nd s ipren acy iy hte un ler vent ? “ss awit , P 1 diate change 1 overcame illne thro aa tne = weakness through power interior ¢ ut ‘ eded in fa perior evolution, failure 1} suces ul os erted pAatperist ints supren ( Ty thsoluts ll It is abs All successes use it. sfeo Ne f } ggg SB: 7 | discovered t principle which | obser ed tl ccesstul personalities employ, either cons« inconsciously [ also discovered a principle i hails no education. Lom ome belbeved that if 1 wand i that When I was eighteen years of a it looked to ons would change, for, I had but one ‘ e as thouch I } d bsolutely no chance to s% ilure, and therefore there was but one ceed Fifteen months ltogether in c« mon public cess, and I began to use this prit plé and . , . _ ae ‘ ; school was the extent of n education [ had ne se arose my ambition, my Pp noney When my father died, he left e twent health, my sue SS and my supremac dollars and fifty cents nd | was earni hardl You als ay use tnis principle 7 s nough to keep myself alive [ had no friends for ', purposefully, consciously and profit I was -vative ) F mo ad nt f vo | Be edge. ancy lee ell id apetaregee nll River + Open your eyes. i no plan o lite to elp me so ny probl : : . ; In tact, I did not know enouvch to know that life is Just as there Sa principle ot darkness so rinciple of failure, i ‘ h. w T nd was a real problet even though I had an é | I 7 VARS ? | iveness i \ 1 1S¢ t rit Ipie cute problem of life’ on my hands [ was blue ; iste ‘semip I cl} } | . P consciously orf unconscl1 s ve nd despondent and thoughts of cterna misery . : ov : : . to be a failu Wh See ccess nd trose in my mind constant! I was living and ° Pe oe valkine w rry . Sia through blind! seeking to find your path tl | ‘ » : the m: - oO di fliculties Why not pen \ t Nothing appealed to me. tal eyes” Uhenughs te was of thie eubile soc: I was tired, nervous 1 t | co d not si ) ciple, nd hus he ue ‘ ‘ pS eo oh - I could not dives without awed I had no power consciously and successfully dvance in the iif - y P . ° f mMrer ) . . — 7 Encam ¢ Vu-gy ot appli tion Ren ws ippe led to me Nothing pre cy and awa if 1 farure i p red werth doing from the fear that I could M , Requires no education. not do anvthineg because of my poor et pment of roe , . mind amd body I felt that I was shut out of th [ discovered this subtle principle—this 1 world of success and I lived in a world of failure ccess—through misery and necessit You ne 1 : eager ble h Ry UT Sig a Le] . € iserabie to ! e the ene 0 I relied on luck. ila. ‘Wane Sacer aie 4A econ Sctuéiel 1 was such 1 pauper in spirit that [ blind le successful individuals of ll time ot pe nded on drugs md doctors for mv healt} , t Il races nd of ll } 1 father before me I was “Aoatet nd depended consciously or unconscioush nd T on luck for success if I were to have anv | _ onsciously and purposefull It re sciously r ne sly believed that if eve were tion. I preparat

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POPULAR MECHANICS ADVERTISING SECTION 15 and Surest Road to and Success t se \ny one can harness, emptoy and ind thus put it te work for success cy Kevardless of what kind of suc sire. this btle principle is the key that nue to what you want. From Moses to Roosevelt. \loses, Casar, Napoleon, “Theodor Mary Baker Eddy, John D. Rocke liearst, Herbert Spenecr, Emerson, rean, Harriman, Woodrow Wilson, rles Schwab, Cyrus Curtis, Lloyd-George Charles E. Hughes, Abraham Lincoln shington, Marshall Field, Sarah Bern ( rm Nordic i Melb ind tho isands nds of with. can suc d fail with it. | t} if t no one » ne in We owe each other. realizes tl human beings owe a duty ery lowest type of human h to the devree of wishing to pro meone else This world does not n t of the lowest and mos i n bemes Almost veryone ethin ! é lso wat his fe throuch his discovery Chi is pe | | feel that I sl d nes pe " duty tow is nv fcllow | did ine ¢ ery ¢ ri ever t to nduce every on " t T x! extent ! it h the is btle princip! Human nature to doubt. re that it 1s human n to have less confidence in this principl putting in the hands of thousand duals f i. few pennies, but Lt cannot help t r mression [ thus possibly cI te I i duty just the same tt urge any one to procure it because I of pennies but becau th results at c very great it would be a sin. | tle principle is SO absolutely powerful ind er-mastering in its influence for good prottt, pros rity nd success. that it would be inil f kept it If and used only for my personal benefit In your own hands. ) I [ of the truth of my stat nts—so isolutels positive im T of the correctness of fits tunption and so absolutely certain am 1 that tl principle, in your hands. will wonders for you tl tr hands © twenty-four hours at my risk and expense You \ ecogenize ‘ lue of this within worl t | m wtiline to place this principle in prine nl princty practicability, its potenc its eality 1 its power nd usability for rsona rotit, 1 Suir incement Thousands of py prosp I thousand C tion disclosi ne { I iccess 18 wort i ‘ oney Some have writt ly hon dollars for You will wonder that | t ! tho na loll Ts ior thrs intormation tor principle, after you get it into I ior i realize its tremendous power and influet Sent to anyone. I e derived such tremend esults from its power, that n and matured child to have this ) prosperity and weaitl I vt | to send it to any one—t t ldress on aj 1 without nele penn t l You would do as I am doing. Vou wauld never for i ne S } t ra | 1 roruive I i | ‘ wr " tle y pm 7 | n vive \ if ery ro ! a esccccccecceseseceeeses (_OUPON Teer) ALOIS P. SWOBODA, 705 Berkeley Bidg., West 44th Street, New York City, N. Y You may send me t won | of u I i ai ! ipl I T “ c Na NOTICE—If yeu send me one doliar today, with coupon t witt be refueded te you if you are not completely satisfied. Yo are to be the sole judge. The above statements are absolut«ly guaranteed ia every way. if this subtte principte of success in your own hands is not worth at least a theusand dollars—it costs you nothing

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16 POPULAR MECHANICS ADVERTISING SECTION DoYouLiketo Draw? Here Is a Simple, Easy Way to Draw a Comic Face Complete Conservatory Course By Mail Wonderful home study music lessons under great America: European teachers. Endorsed by Paderewski. Master teacher and coach you. Lessons a marvel of simplicity and completer 4 Write telling us cour Any Instrument or Voice W"¢,{°.1¢ 8, 9%» Piano, Harmony, Voice, Public School Music, Violin, Cornet, Man Guitar, Banjc, or Reed Organ—and we will send our FREE CATA! covering all iustrumental and vocal courses. Send NOW. 6 ) . | University Extensior Conservatory, 101 Siezel-Myers Bldg., Chicago, !! ANCE the Newest Dances! YOU can learn Modern Bal! room Dancing now in your own home— no matter where you live— by the wonderful Peak System of Mail Instruction Courses on Fox-Trot, Waltz, One-Step and Tw« Step include the last word in new Society dances the Dardanella Fox-Trot, Bellefield One-Step London Rocker Waltz and the Modern Two-Step New Diagram Method: Easily and quickly learned. Thousands taught successfully. Suc cess guaranteed. Send Today for FREE Information. Write at once for surprisingly low offer. (15) WILLIAM CHANDLER PEAK, M. B. President, Peak School of Dancing, Inc. Est. 1880 Room 60 821 Crescent Place, Chicago —_—--: RAILWAY TRAFFIC INSPECTORS ASSOCIATE 4 P wiTH Make a square with pencil, then add to it with pencil as shown inthe smal! squares above. Erase all BIG MEN pencil guide lines after the drawing is completed ” We will not give you any “grand prize,” if you draw | this picture. Nor will we claim to make you “rich | the t ol n. TI in a week.” But if you are anxious to develop your | y talent with a successful cartoonist, so you can make | ~ Ar ~ ~ money, send a copy of this picture with six cents in seems Seay ettvact dhe Sane attention of “4 stamps for portfolio of cartoons and sample lesson | selaper hag soe ncaag eget: ? / plate, and let us explain more in detail. Some of Learn This Profitable Profession ay the most successful cartoonists are former students a cia 3 igen to eS . . . * A ’ of this school. It is not hard to learn to draw orig inals when you are shown how in a practical way. op z i wW for R ilway I i ‘news tors is so good * e in * | There Is a Big Demand in This Field ; Our Booklet tells of tl leal vocation —out in the big out rs—how 1 associate with big mer . y tr t . I [ 1p y ke r guert Why nots | h t $11 1 e Buffalo, N. Y. SUCES SESS ESET ESSE EERE SE EERE EEE OPPORTUNITY COUPON ‘lease send, without obligation to me, Booklet ! explaining your Railway Traffic Inspector's Co THE W. L. EVANS SCHOOL OF CARTOONING | “The School That Has the Reputation’’ 821 Leader Bldg. CLEVELAND, OHIO Please Mention Popular Mechanics

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| aes vould you like to give that friend of yours nks he’s a scrapper, the surprise of his life ? t it be great if you could I'll put him, ‘Come on, gloves with d then show e really boxing ! ippose a ruf- ited your ipolo ke a beat —~ © It’s not a question of bravery 01 i dark hox. If you don’t know how, dn’t yo hing to be able to overcome your assail yw how to disarm him, how to break his ‘throat x waist, how to guard against i1unches at your stomach, etc. ? ywn heart and soul you want to be able 1 man’s part under all circumstances. And ou should know how to box and defend | Stillman, the student and friend of Mik« who taught boxing for years at the New iletic Club, will teach you boxing and self e right in your own home, before a mirror 3 ur method is called the “‘ Shortcut System,” ndamentals—hit, guard, duck, feint- g and foot-work—are all taught in 5 Marshall Stillman starts you with things For instance, he leads you from the ke in swimming to the famous Mike , n Leverage Guard; from holding out your coin and twisting your body at the sams he leads you into striking a punishing blow weight of your body behind it. Wher iy in full payment for the entire course POPULAR MECHANICS ADVERTISING SECTION rn to box at home you ve Lo “~ you go up against your first opponent you will know how to strike a blow with the weight of the body behind it, where to land it, when to land it, what to expect in return, and how to guard against it This system has enabled professionals to learn in a few lessons difficult blows they could not mas- ter in less than 20 lessons by the old methods. We get let ters every day fron students saying tl after studying only a short able to outbox bigger while they are ana neavier Oppo- strength ; it’s knowing how lo lo take a beatings i In addition you wil be taught eight holds in standing wrestling and eight bone-breaking or jiu-jitsu holds and releases for use against violent assault. Also three roun of shadow boxing and a set of daily exercises— to keep you in good condition. And to every student we give a free copy of Mike Donovan's famou book, “The Science of Boxing,” and describes every worth-while blow known to the which illustrate ring. There are 175 illustrations in the course Send No Money To prove our claim—that we can teach you boxing and self defense at home —we send th entire course on 10-day approval. If you keep the course, send us $5 return th t. You run Otherwise course nm the tenth day after vou receive no risk. The price of $5 (Canada $6, foreign countries $7) is a special offer, which will only hold good on the present edition —the regular price is $10. So mail the coupon today to Marsal? Stillman Association. Suite 6-D. 461 Fourth Avewue New York eee ee i es oe COUPON — . « . . - a o = .— (ALL STILLMAN ASSOCIATION, Suite 6-D, 461 Fourth Avenue, NEw York ’u may send me at your risk, on 10-day approval, the complete Marshall Stillman “Shortcut Systen ” leaching Boxing, including all the extra instruction described above I agree to 2ither return tt - 1s on the 10th day after receiving them, or else send you $5 (Canada $6, foreign count: . Ntw

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kr 18

“gy 000 Saved!” “Last night I came home with great news. Our Sav ings account had passed the thousand dollar mark! ‘‘A few years ago I was making $15 a week and it took every cent to keep us going. Then one day I realized why I wasn’t being advanced—I couldn’t doanything in particular. I decided right then to invest an hour after supper each night in my future, sol wrote toScranton and arranged for a course of special training. “Why, in a few months I had a whole new vision of my work! An opening came and I was promoted—with an in- crease. A little later another raise came—I could save $25 amonth. Then another—I could save $50 each pay day. So it went. “Today I am manager of my department. We have a thousand dollarssaved—and there is a real future ahead!”” For 28 years the International Correspondence Schools have been helping men and women everywhere to win pro- motion, to earn more money, to have happy prosperous homes, to know the joy of getting ahead in business and inlife. » You, too, can prepare right at home in spare time forthe position you want in the work you like best. All we ask is the chance to prove it. Choose your career from this cou- pon and mark and mail it now. —_< ———$ I i a TEAR OUT HERE = sme cee come eee coe INTERNATIONAL CORRESPONDENCE SCHOOLS Box 5650-B SCRANTON, PA. Explain, without obligating me, how 4 can qualify for the position, or in the subject, before which I mark X EKLEOTRICAL ENGINEER }Electric Lighting and Kailways Electric Wiring Telegraph Engineer : [) SALESMANSHIP Bibver: rIsING Window Trimmer Show Card Writer Telephone ork Sign Painter MEOHANICAL ENGINEER Railroad ne Mechanical Drafteman ooo Machine Shop Practice [i Cartoo Toolmaker BUSINESS MANAGEMENT Gas Engine Operating OLVIL, ENGINEER \Surveying and Mapping MINE FOREMAN OR ENGINEER STATIONARY ENGINEBR Marine Engineer Ship Draftsman ARCHITECT Contractor and Builder Architectural Draftsman Coucrete Builder )Structural Engineer PLUMBING 4ND HEATING Sheet Metal Worker Textile Overseer or Supt. CHEMIST Mathematics Private Secretary BOOKKEEPER Stenographer and Typist Cert. Public Accountant TRAFFIC MANAGER Railway Accountant Ly C lommercial Law aos ENGLISH Lj Teacher Common School Subjects CIVIL SERVICE Railway Mail Clerk AUTOMORILE OPERATING _Janto Repairing e tel

Freneh J Itelise Nav ga © sGRicuLTURE LD Peultry Katsing

Name Present Occupation Street and No City.

IO Canadians may send this coupon to ‘ international Correspondence Schools, Montreal,

7T-26-@ Lledse Mention Popul POPULAR MECHANICS ADVERTISING

SECTION

BY DOING Every phase of all ranches of taught by Actual Practice In America’s foremost a: dest institution for trade train yg. No Books Used Individual Instruction. Start Any Day School open all Summer Write for FREE 64-Page catalog THE NEW YORK ELECTRICAL SCHOOL 44 West 17th St., New York Gi ity Battery Charging Pays

Many are making $110 to $150 extra profit every menth in HB Battery Charging. Some even more su can make big profit too. This HB 50+ watt Charger will recharge to #8 oo torawe hatteri« a me time, with a current st of « lic tol per ‘battery. Autoist pays Thc to $1.50, Figure your protits. Small Cash Payment Puts This Money-Maker in Your Garage Balance in easy mor hould easily ‘ w or full particular back Guarantee Do it HOBART BROTHERS CO., Sox M612. Troy, Ohio thly payments which earnin prot k its ris a N Absolute money TODAY

| Tri State College of Engineering | Makes you a Civil, Electrical, Mechanical or C! | Engineer in two years, or 96 weeks. No e! examination. H. S. education not required. } tuition, board | expense per year of 48 weeks, | heat and light $260. Same price for commercial c | ANGOLA, INDIANA 100 College Street Copy this Sketch and let me see what you can do with it. Many newspaper artists earning $30.00 to $125.00 or more per week were trained by my course of personal individual les- sons by mail. Landon PICTURE CHARTS make original d ra wing easyto learn. Send sketch of Uncle Sam with 6c in stamps for Sample Picture Chart, list of successful students, examples of t! evidence of what YOU can accomplist Please state you “Che Salis School of CARTOONING and ILLUSTRATING | 738 Schofield Bidg. CLEVELA*

eit

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JE LEARN DRAFTING AT HOME—IN SPARE TIME—As You Would ‘in Actual Practice Get into this constructive branch of industry where big salaries are paid. ing is necessary to become a capable draftsman with the he ‘Ip of the Columbia School of practical lessons of our famous or study course, at home You will be pe anasiy coached and instructed, president of the school, whose long e xperience as a draftsman and teacher jualifies him to give you the traini imer talog

POPULAR MECHANICS ADVERTISING SECTION 19 Drafting. You can master the in spare time.

especially « branch of drafting.

Become a Specialist ing, teaching you to make actual _ cee tama as you would in any drafting room, but the additional benefit of a post gY raduate course in some special A you as a

Chief Engineer $25,000 to $50,000 a Year How “Columbia” Students Succeed of the Columbia f Drafting often se- t «at $2,000 or more

always in line for advancement.

No previous train- mail, by Roy C. Claflin, r you need to become ful Draftsman a succes We not only give you thorough and practical training in Mechanical Draft- big field of thus this opportunity is opened to trained specialist in profession Draftsmen Get $35 to $100 a Week Pec of ths work the draftsman is paid a big salary and is The draftsman’s

re complet

‘ ree. Hundreds of Chief Draftsman i n } Colum $50 to $150 a Week d neg «ar w making big « erns all over the country. Many more are for splendid positions now open Here is what ** olam . t ne is doing for some of our graduates Laurence . at over $5,000 a year; George Murray, $45 a week to GT ang rra #2,800 a year; A. L. Gash, - 9180 a month to < a month to start; T. FI 0 a year; R "These are ° chr n ton of cassehaombes 4. vilar cases Big Caneneas Employ Columbia Graduates neerns in America employ Columbia graduates in fting depa vents because of the thorough practical ve give which enables them to step rightinto important pos Our diploma is the entering wedge into big g rooms everywhere Asa Columbia graduate you are zed aa an expe rienc ‘ a draftsman, not as @ mere appren Our training spells iccess for vu. Why be satisfied with jing, onderpaid rhe mn when there are hundreds of g sitions open to you in the big field of Drafting’ We led upon to place tr ied draftsmen more rapid! than we luce the Ge oneal couesructs n companies, manu fa t g cor engineering projects, et mbers ar 1d at be tter salarie an over bef COLUMBIA. SCHOOL OF DRAFTING Roy C. Claflin, President Dept. 1136, 14th & T Sts., N.W., Washington, D. C

This pe poser geen J bar rem Furnished Every instrur t neede i fe or th ve course ts inc jude i

pay is from $35 to$100 a week. A knowledge of drafting is the stepping stone to big technical positions in the indus- trial field, paying as high as $50,000 a year

Draftsman $35to $100 aWeek Send this CouponToday le tus tell vou the fascinating at of Drafting and how you can aster this lucrative pro- fe big sala ries and stead iivanceme through r help WRITE PODAY! =

Columbia School of Drafting "". “-, 7 ROY C. CLAFLIN, Pres. Dept. 1136, 14th & T Sts., N, W.,Washington, D.C I am interested in ur pra al trair 2 M Drafting lease ss 1 e Free « k t rs, teatimor la, t ~ t I ils . i s il post ad é r t ked | N M 1 Dr MI I f tl i " irs 4 se Architectural Drafting way Draftin Automotive D Automob:le Drafting stent Draft Hydro D Z Electrical Drafting eegraphical 0 g “ e Desig Aeroplane Drafting hip Drattine on) fon Snecial Machinery Drafting ; ai Draft bop Mathemat Sheet Meta! Drafting Radio Drafting Build ourse Structural Drafting

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20 POPULAR MECHANICS ADVERTISING SECTION —“and from there we went to Japan” Talk about adventures! Men in the Navy come home with the kind of experiences that most chaps read of only in the books. Here’s your chance! Uncle Sam has, as you know, a big Navy and gives red-blooded young fellows like you an opportunity to step aboard and “shove off.” What will you get out of it ? Just this: Achance to rub elbows with foreign folks in strange parts of the world. The chance for good honest work on shipboard—the kind of work that teaches you something real; the kind of work that puts beef on your shoul- ders and hair on your chest. You will get 30 care-free vacation days a year, not counting shore leave in home or foreign ports. You will have the kind of comrade- ship 1n travel that sailors know. You will have regular pay, over and above your meals, lodging and your first uniform outfit—good stuff all of it. You can join for two years. When you get through you'll be physically and mentally “tuned up” for the rest of your life. You'll be ready through and through for SUCCESS. There’s a Recruiting Station right mear you. If you don’t know where it is, your postmaster will be glad to tell you. To any Father and Mother :— In the Navy your boy’s food, health, work and play, and moral welfare are looked after by responsible experts Shove off !-Join the U.S.Navy

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POPULAR MECHANICS ADVERTISING SECTION 2 Is $5,000 Yearly Enough? ~~ Practically everywhere large business institutions are in urgent need of men trained in railway and industrial traffic work. And from day today this require- ment is expanding with overwhelming force. This acute shortage of traffic experts, tho forseen and prepared for in so far as possible, can no longer be met by the present source of trained experts. In view of this condition, an opportu- nity —a very unusual opportunity indeed ~exists for every ambitious man. If you are ambitious to improve your posi- tion in the commercial world, this need for traffic experts lights the way The traffic expert is a commerce di- rector. Heis a very important factor with the railways and large business. Only the competent man can handle efficiently the complicated traffic prob- lems confronting every shipper every day. His training enables him to prof- itably open up new markets—to outstrip competition by more advantageous rout- ing of shipments. He knows how to obtain shortest mileage, lowest rates, quickest deliveries. His knowledge of traffic laws and transportation results in annual savings of many thousands of dollars. He is worth avery large salary. And he receives it. Large institutions do not hesitate at paying liberally for the man who possesses this training— $5,000, $7,500, $10,000 yearly and up is not unusual for proven traffic experts. Can you wish for a more fertile field than that of TRAFFIC MANAGEMENT ra LaSalle training in traffic nagement, many men have n from meager salaries to itive positions with large ncomes and an open path to still greater advancement. At enormous cost and with the issistance of many of America’s foremost authorities inindustrial ind railway traffic management, both foreign and domestic, La- Salle Extension University pre- ents a practical plan of HOME TRAINING which you can follow during your spare time. Experts Train You Under the LaSalle plan you learn by t! Problem Method”’ under the direct supervision of a staff of more than 70 experts headed by Mr. N. D. Chapin, rmerly chief of Traffic Bureau of the New York Central Railroad and West ore Railroad—one of the most widely wn and most successful traffic direc- tors in America. lhru this Problem Method, you are ide thoroly familiar with the actual roblems handled daily by traffic mana- ‘cs for large shippers, railroads and teamship lines. You are instructed in rates, Classification, routing, bills of lad- ng, claims, demurrage, railroad account- nig, organization, management, inter- state commerce laws, etc. Every subject * under the direction of a successful alist. Behind La Salle training is the co-oper- hand constructive help of anadvisory | board, comprising seventy of the most prominent traffic and transportation men in the country, who know from exper- ience every phase of railway and indus- trial traffic work. In a few months training under the LaSalle Problem Method you will obtain a far more thoro knowledge than can be derived from years of actual traffic exper- ience. You profit by the combined ex- perience of many successful men. When you finish LaSalle training you will be prepared to assume complete charge of traffic management for any institution. You will have a thorograsp of the entire subject. This training pre- pares you for Successanda liberalsalary. Train By Mail LaSalle Extension method of training enables you to retain your present posi- tion and devote your spare time outside of business hours to preparation. The matter of cost should not defer your start toward a more successful future. Tuition is comparatively small, and pay- DEPT. 664-T book for the ambitiou This without obligation on my part Name Address City yore ao i Present Position man, “Ten Year ments can be arranged onaconvenient monthly basis. Any man ambitious to forge ahead and place himself in a position of security and better things need only follow in the footsteps of other men who have sought LaSalle's aid to achieve success. LaSalle traffic training has gained thoro recognition everywhere as a de pendable means to quick advancement It has promoted men from al! walks of life—clerks, salesmen, lawyers, book- keepers, executives, department heads, etc. Mail the Coupon This is your firet step toward an im portant position in the traffic field. We will immediately send you valuable in formation pertaining to traffic manage ment, a book fully describing LaSalle problem training and our famous book, “Ten Years’ Promotion in One.” Investigate today the opportunities open to trained traffic men. LASALLE EXTENSION UNIVERSITY The Largest Business Training Institution in the World CHICAGO, ILL. Please send me catalog and full information on your Course and Consulting service in Interstate Commerce and Railway Traffic. Also a copy of ~ 4 * Promotion in One your valuable

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lo What's the good of living at all, if Life is just one miserable day after another, full of dise omfort and failure, often of actual suffering’ You can't enjoy life, or make a success of anything, while you are undeveloped, weak, ailing; asickly grouch whom nobody wants to help along or even have around. When you wake up in the morning with a rotten taste in your month anda weight in your chest; with your brain woozy and your nerves all on edge, tired out before you even begin the day, YOU ARE IN A BAD WAY. PUT YOUR HUMAN MACHINE IN ORDER Dyspepsia, indigestion, biliousnuess, constipation, nervousness, and a host of other ailments are simply signs that your internal machinery is not rhe rigut—that REPAIRS ARE NEEDED— fresh blood, new and vigorous body and brain tissues. It isn’t the discomforts you suffer from such chronic ailments that is important; it's the serious in- ternal condition that they indicate Heed those warnings of Nature. Make the needed repairs before it ? too late. You never will be well and ome and capable until you do. You get worse—each day until the final iplkonas or breakdown comes. That is the Law of Nature. There's no dodging or getting away from the penalty she exacts when her warnings are not con- sidered Make Yourself Fit You can do it, if you will only make up your mind to get out of theway of putting the matter off “until to- morrow” and begin at once to Build Up yourself. Nature has implanted in every 1uman Organism a wonderful revivify- ing, revitalizing force, which she will exert to the utmost when you Jearn her methods and observe her laws, Patent medicines won't put you right. Droggist's dope won't do you any good. Let Me Show You Nature’s Way I have spent my life studying Nature's methods of building up and revitalizing wornout, broken-down humanity. Her laws are fixed, immutable, absolute, operating for every individual alike. I KNOW what they can and will do for YOU, through my own experience and that of thousands of my pupils, who came to me weak, ailing, discouraged, and are now strong, well, able, ambitious men and women. It makes no difference what your present condition is. Let me show you the straight, sure path back to health and strength and happiness. It’s Nature's way, and there's no more doubt about the operations of Nature in the human frame than there is of the daily rising and setting of the eun Send for My Free Book It will tell you all about Strongfortism, the Science of gaining and main- taining vitality and vigor in Nature's way—NOT through any iron-c courses of muscle-tiring exercises, starvation diets or any other fanciful fads — but by Living Life as Nature meant it to be liwed, and the reby getting the greatest enjoyment cout af it rite now for a copy of “ Promotion and onservation of Health. St Energy. Don't put off sendme ter it. IT’S PREF, but it’s worth goad money to you, as you will gee when you have we 1 it. Fill out the ceupon below pnt nclose it with three 2c stamps to co packing and postage and | will mail you a apecial letter with the book = : the subject you are most interested in LIONEL STRONGFORT Physical and Health Specialist 1284 Strongfort Institute NEWARK, N. J. esseeesCUT OUT AND MAIL eee COUPON=+««s00 Mr. Lionel Strongfort, Newark, Dear Strongfort: Please send me Master and en Niagara School of Music NIAGARA FALLS, W. Y senee MAIL THIS TODAY:a«cee« Dept. 77 Without obligation t mail to address bel rh k * The Niagara "Met!

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POPULAR MECHANICS ADVERTISING SECTION 23 R COLLEGE AUTOMOTIVE ENGINEERING YOUR OPPORTUNITY TO WIN SUCCESS = By ERWIN GREER ca Trained OU cannot make a \ mistake in selecting MenWanted either the Automobile, Tractor or Airplane _busi- At Big Pay ness as your life work. There is no other field in — which you will find a better Automobile Engineers future. You want a better job; you want a chance to go into business for your Automobile Repairmen self a little later on—and p there is no reason why you Automobile Salesmen should not succeed in’ your Starting and Lighting ambition. Let me give you some interesting facts First, you must have Brazers and Welders specialized knowledge of some kind if you want to get on. Second, you must = | Aeroplane Engineers get the best possible train- - ing your ability and means will permit. Your earning er cope on your training. The best pays best in the end. Over 15 years of my life have been ver to the building up of Greer College of Automotive Engineering and starting ambitious men vad to success. I never let anything stand in the way of making Greer College the best. The Master Method Easy to Learn

Garage Managers

Experts—Vulcanizers

= Tractor Repairmen

My system has been called the ‘‘mas ‘‘Learn by doing’’ is the basic principle of my master ethod’’ because it makes master method. It’s just like going to Manual Training School. It hanies in the shortest time. Every _ is not necessary for you to have a college education—ali you ictor is a specialist in his line, need is plain ‘‘horse sense’’ and the ability to read and write takes a personal interest in your English. You do not need any previous experience of any cess. It will take you-ten to twelve kind. If you will promise to work hard, I will guar- 7 ks to complete. antee that you will succeed. “S$ 2 . ‘ . . oy Here is a list of our courses: Automobiles, Tractors, Airplane Engines, Stationary Gas Engines, Machine Shop At Work, Acetylene Welding and Brazing, Vulcanizing, Electric Lighting and Starting Systems, Driving, etc. ore? “2 . =: , tat ‘ +O" > Enormous Demand forTrainedMen Special Tuition Rate Now '°\~ gutete TAS and for trained men is increasing b training at the Greer College of Aut tive Engineer 4 je" ,° “ nd b. ind if ou can = deliver the goods nts ome ber c he best : f os the b,” s can practicall pick your job and command ; . { a ry 7 ue ‘Fs , OS 8 Pe r own salary If you don't want to work for | mt . 7 Ss 4 & eone else uu will find thousands of splendid t A: oe 14, » rtment” will help you get started right : = ' AX aye P.S. I * LX S SF : want to send you FREE my book, “ How to Succeed in the Automobile, SS . P ‘tractor and Aeroplane Business,”’ which wit give you full particulars about 7 AS) re the wonderful money-making opportunities in the Automobile, Tractor and / S : ° \eroplane business. Several pages of PRACTICAL INFORMATION on Fs S , — }puaatiog Systems, Auto Repairing and Driving, etc. Worth $1 a AS ' You cannot afford to be without this book. o . GREER COLLEGE or Sey 2 AUTOMOTIVE ENGINEERING Wry AS Dept. 16, 1519 Wabash Avenue, CHICAGO (“Gor Or af oo a ¢

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Electricity—Learn at Home There is a wonderful opportunity right now for young men who like electricity. If you are ambitious and will train yourself in spare time you can step into a good position and get ex- perience that will give you a real start toward success in life. Good salaries are offered with rapid promotion. For 28 years the International Correspondence Schools have been training young men for success in electricity and over 200 other subjects. They will help you prepare right at home for a position in the line of electrical work you like best—or in any work that appealsto you. Thou- sands of men, through I. C. S. training, have stepped into fine jobs, but never were opportunities so great as now. Let the I. C. S. help you. Choose the work you like best in the coupon below, then mark and mailit today. This doesn't obligate you in the least, and it will bring you information that may start you on asuccessful career. This is your chance. Don't let it slip by. Mark and mail this coupon now. cre es ee es TEAR OUT EE ce ce ee ee INTERNATIONAL CORRESPONDENCE SCHOOLS BOX 5649.B, SCRANTON, PA, Explain, without obligating me, how I can qualify for the positica, or in the subject, before which I mark X ELECTRICAL ENGINEER Electrician Electric Wiring D — MICAL ENGINEER ALESMANSHIP RADY ERTISING MAN Electric Lighting [) Show Card Writer Electric Car Running Outdoor Sign Painter Heavy Electric Traction ([ RAILROADER Electrical Draftsman _. (ILLUSTRATOR Electric Machine Designer "DESIGNER ) Felegraph Expert J BUSINESS MANAGEMENT )Practical Telephony " Private Sec retary MECHANICAL ENGINEER BOOKKEEPER Mechanical Draftsman ia) Stenographer and Typist } Toolmaker i) C Jert. Public Accountant }Machine Shop Practice Traffic Management al ~ - = Gas Engineer bal G jommercial Law CIVIL ENGINEER |) GOOD ENGLISH )Surveying and Mapping ..| Gommon Sctivol Subjects MINE FOREMAN OR ENGINEER LICIVIL SERVICE ARCHITECT O Railway Mail Clerk Architectural Draftsman be STATIONARY ENGWEER PLUMBING AND HEATING ) Pextile Overseer or Supt. Sheet Metal Worker LL] AGRICULTURE ) Spanish Ship Draftsman _) Poultry Kalsing Froeneh Navigator (J AUTOMOBILES Italian Name ———— 7-208 Present Occupation. ™ —— ae Street and No. _ iain City. Slate. Pl e Mention Popula Vechanics POPULAR MECHANICS ADVERTISING SECTION WE TEACH COMMERCIAL ART The Meyer Both College is conducted as Department of the Meyer Both Company ‘the most widely known commercial art organizati in the field, who produced and sold last year over | commercial drawings—used by the leading adverti the United States and Canada. YOU get the benefits of 19 years’ successful exp: ience in this course—and are taught the \ fundamentals which enabled this orgar tion to dominate its field. To give you | you ought to know about this intensely * esting, highly paid profession—(equally op to men and women)—we will se nd our spe book,“ YOUR OPPORTUNI T Y”, if you will p half the cost of mailing—4c in stamps. Meyer Both College of Commercial Art Address Dept. 16 N.E. Cor. Michigan Ave. at 20th St., CHICAGO, ILL, FREE 10 Lessons et tenn my | offer, 10 lessons in public speak person pe doe ry = 0 Become a powerful speaker spare time by mail. ercome ‘stage fright.” voaleret your vocabulery train y memory, gain at -couttenes. Increase your earning pow ularity. ebave band: This offer enade.ctrte or por Offer Limited poses ant art strletty for advertising pos Write at once, le this free feseen ALE. 7) EA North American Instituto, 1194. Manhattan Bidg., Chicago. |!'. MAGAZINE f° 2s2r"s; Finger Prints! Read how Finger Print Experts earn big money in fascinating work. Send 10 cts. i today for copy of latest Finger i} Print Magazine. Brimful ofthrill- ing, abso-bing fact-stories. Pro- fusely illustrated. Explains mod- ern science ¢. P inger Print € identification. Finger Print Publishing. Assn.. Dept. Path : 1503 Mallers Bidg., Chicago, '!! 7*5,000 mean eco are often paid to traflic managers. Numberless traffic positions pa to $5,000 a year. Milhens of dc lage are wasted annually becaus« Trance ‘of cheaper ways to shir ean be a traffic expert — «t make big money for yourself. The ounands of men — Needed Learn at Home—Book Free frs"i(:"" Ne Prac op M: th quickly make tified Traffic Manager You can very soon qualify for a splen« position. Write quick for big new illus trated book describing this v training in detail, Write today. Addre American Commerce Association ©°** '°5:,2043, sr"! &° $1800 for a Story! ECENTLY an American writer was paid $1800 for a sing!« short story. By learning to tell the stories of her ireams tt woman has found her way to fameand fortune. Youcan leart to write, too. A new practical courseof instruction wil! give you the training right in your own home during your spare -— Endorsed by eminent writers including the late Jac. lene the be ook Write Today for new booklet **How te Write.”" Mochi letis free. Special offer sow being made. Write teday—now! Hoosier institute, Short Story Dept., Dept. 4/1/ Ft.Wayne, Ind. ey St SHS 4 thh fA BY MAIL fa ve peer ene ship. Under my guidance you can become an expert pen- man. Am -plecing many of my atudents as instructors in . commeroialbcoblegesat high salaries. If you wish to become a better penman, write me. I will send you FREE one of my Favorite pens and a c op y of the Ransomerian Journal. Writetday. C. W. Ransom, 476 Essex Bidg., Kansas City, Mo.

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SE Si Oe POPULAR MECHANICS ADVERTISING SECTION

— =

Drawing Outfit Drawing Table

Complete Set of Drawing Instruments and Drawing Table Yes, I will give you this co7- plete drawing outfit absolutely free. Tie instruments are in a handsome high class, plush lined folding case. They are regular draftsman’s working in- struments. Besides I will give you ab- solutely free, a 20 x 25 inch drawing board, a 24 inch T square, a 12 inch rule, a supply of drawing paper, two triangles, a Frexch cvrve, pencils, erasers, thumb tacks, etc. Delivered at Once The drawing table is the “Chief's Own” adjustable folding Drawing Table, same as used and needed by first class draftsmen. The complete outfit and a are delivered to you at once. You have them to work with from the very first day. Be a Draftsman Draw $250.00 to $300.00 Per Month There is an urgent demand for skilled draftsmen. Companies are issuing calls every day for men to fill potions. paying from $250.0 to $300.00 month, Work is light, pleasant and profitabl _ Chief Draftsman ese lam Chief Draftsman ofalargeand kind that you must be able to do to well known firm. Ihave beendoing _ hold permanent, big paying positions, the highest paying expert drafting I give you my individual instruction, work foraquarter ofacentury and If your work isright, I willadvance you I know just the kind of training _ rapidly. If it iswrong, I will show you where that is demanded from men who and make you doit right, and do all I canto get the big salaries. Itrain you by make you an expert draftsman and designer giving youactual, practicalwork,the inashort time. Write todav without fail. Pay As You Wish") want is the right kind of

you the working outfit free it yeuget ia at once. I charge a very small fee for training you to ced dr an fzpertenced aftsman. You can pay the small cost as suits you best. < Chief Draftsman Dobe Se a Dept. A135, 4001 Broadway, Chicago upon or ig 4 Without any obligs ation on me whatsoever, please @ mail your book, “Successful Draftsmanship’ and coop ey < full particulars of your liberal ‘Personal Instruc Ww serd it to me today. { will send you .@ tion’ offer toa few students. It is understood that tely free and postpaid, my < lam obligated in no way whatever. are. and the great special »@ offer that 1 am now maki on "Drawlag Te the complete @ an’s Working Outfit and Dra ble absolutely free. yo ee EO of any = pe — FR, in the coupon. Get in line for a 4 Name - big paying pantien Getting the «4 book and ful! particulars of the special o is the Grst step. a Address........ = e CHIEF Dept. A135, 4001 Broadway, Chicago, Hlineis

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POPULAR MECHANICS ADVERTISING SECTION Are You Living or Dying? || No More Wrinkles BEAUTIFUL FIGURE Superfluous Hair Vanishes Like Magic. Eyelashes Beautified Pimples and Blackheads Removed Let this woman send you free everything she Beautify your face and form quickly Answer this question! Life either increases or decreases, The tissues of your body are either growing stronger and multiplying or are being de- voured by the millions of germs lying within you, ready to become active just as soon as your vitality weakens. Exercise Means Increased Life Daily exercise builds up and in- creases the tissues. fit puts the entire lungs into action, making better dSlood, quickens the activity of the other vital organs, throwing off the hidden germs and filling the whole man with renewed life, vigor and ambition. Exer- cise then means increased life, while fhe lack of it causes i we -nec ! » cline eteerteT kite EARLE LEDERMAN which slowly but sure iy The Acme of Physical Perfection spells DEATH. This clever woman has not a aoheliie upon her face; she ha ° perfected a marvelous, simple method which brought a w What Does Your Mirror Show ? derful change in her face. For removing wrinkles he Look in the mirror this very night and see what it teligs method is truly wonderfully rapid you. Your outward physical appearance reflects your in She made herself the woman she is today and brought ternal condition. If you do not show a daily improvement wonderful change in her appearance in : pleasant manner } outwardly, you must not be deceived. Your body is being complexion is as clear and fair asthat of a child. She turned he consumed and you are clogging up like the stagnant pool. scrawny figure into a well deve ee form. She had tl Stop then where you are. Get a grip on yourself this eyelashes and eyebrows, which could scarcely be seen, and very minute. Let this be the start of new life and phys- made them long, thi k and beautifal by her own methods i ° removed every blackhead and pimple from her face ical perfection. Nothing is taken into the stomach, no comn Be Properly Guided een, no worthless creame new process, she removes wrinkles and devel in, scraw On Mass, The enthusiasm and sudden desire’ for the riches of whole figure plump and fat perfect health and a powerful muscular physique have ue pe Ragen Ts wee Fg — mp hececg nares Roig sink led some men without investigation to adopt the first wisleb “29, Remedi se ihe aac aoe Becengyac® nines = “ wars roe aatiin Minaiih “4 ying ir face and fo fter : 4 : method of physical development which presents itself other methods failed. She has thousands of letters on file this is a fatal mistake. ood means nourishment, but the following some foods do more harm than good. Certain courses of Mrs. M. L. B. Albin, Miss., writes: “I have used your bea exercise cause hardening of the arteries, a weakened treatment with wonderful success. I have not a wrinkle on my heart and other dire results. Physicians claim that the face now and it is also improving my complexion which }t Liederman method strengthens the heart and generally ways troubled me with pimples and blackheads. My weight w improves the entire organic system. Come, then, let this 112 pounds before taking your treatment and now I weigh 11 day mean the beginning of new life to YOU vain of 5 pounds. Your treatment ts a Godsend to a!! women, Lam eo grateful you may even use my letter if you w Send for My New Sauk The valuable new beauty book which Madame Clare is 6 “MUSCULAR DEVELOPMENT” a tt preter fe poate will tell you absolutely fre« he ar s new be y treatments and ll sho It telle the secret. Hlandeomely illustrated with 25 full- 1er various new onus re 2 me nd Ww w page photographs of myself and some of the world's best How to remove wrinkles in 8 hours; athletes whom I have trained Also contains full partic How to develop the figure ; ulars of my splendid offer t ou The valuable book and How to make tong, thick eyelashes and eyebrows ; special offer will be sent on receipt of only LO cents to cover How to remove superfluous hair ; cost of wrapping and mailing. Sit right down now and fill How to remove blackheads, pimples and freckles ; in the coupon, The sooner get started on the road to How to remove dark circles under the eyes; health and strength the easier it will be to reach perfect How to quickly remove double chin; manhood, Don't drag along one day lor r | the vouon today. How to build up sunken cheeks and add flesh to the body; How to darken gray hair and stop hair falling; EARLE E. LIEDERMAN How to stop perspiration odor. Simply address your letter to Helen Clare, Suite Asot Dept. 210 203 Broadway New York Michigan Ave., Chicago, IIL, and don't send any money, be particulars are free, as this charming woman is do ng her ut Ren eee eee ee ee ee ee eee ee ee a to benefit giris or women in need of information which w EARLE E. LIEDERMAN, to their beauty and make life | sweeter rand _love velier in ever Dept. 210, 203 Broadway, N. Y. City. wee aumnensn 5" »» | [HOW t0 Get Rid of Moles: send me, without any o ligation on n part whatever, a copy of ae eee ee ' A simple, safe home treatment — | 15 years’ success in my practice. Moles (and other growths) Dry Up. | , Ask for Free Booklet of Full Particulars. — eakenaie ~\ WM. DAVIS, M.D. | Cit Sesee 4141 State Street PERTH AMBOY,N. J. |

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POPULAR MECHANICS ADVERTISING SECTION 27 Millions of’ People Can Write Stories and Photoplays and Dont Know It/

r HIS is the startling assertion recently ma y tle study 1 little patienc a little confidence, and the E. B. Davison of New York, one of the highest thing that looks hard often turns t be just as easy paid writers in the world. Is his astonishing as it seemed difficult tatement true? Can it be possible there are count- Thousands of people immagine they nee fine educa- > isands of people yearning to write, wh really tion in order to write Nothing is arthe fro the simply haven't found it out? Well, come to truth The greatest writers were the poorest scholars. of it, most anybody can tell a People rarely learn to write at schoo Why can’t most anybody write They may get the ps: les there, but ? Why is writing supposed to really learn ft write from the ire gift that few possess? Isn’t t, wide, open, boundless Book of y another of the Mistaken Ideas imanity ! Yes, seething all around handed down to us? Yes , every day, every ir, every n nobody dreamed man could fly. in the whirling vortex—the flotsam dives like a swallow ten d jetsam of Life even in your feet above the earth and me, at work or play, are endless inci n at the tiny mortal atoms nts for stories and plays—a_ wealt w-men below! So Yester- material, a world of things hap sibility” is a reality to-day. n Every one of these has the seed e will come,”’ writes the same f a story or play in it Think! If vhen millions of people will went to a fire, or saw an accident there will be countless could com me and tell the of playwrights, novelists, sce- bout it. Unconsciously you would agazine and newspaper writers describe it all ver realistically. And c I coming—a whole fs ‘ y st l by and wrote dow ‘- And do you xactly what you said, you might be t ti ese writers-to-be are do mazed to find y r story would sound Why, they are the men— interestit mar you've read them—young and old, now magazine r see on the scree ere clerical work, in offices, Now, you will naturally say, ““Well, if ks, selling merchandise, or Vriting is as simple as you say it 1s, ine trucks, running elevators, can’t J learn to write?” Who sa rs, waiting on tables, working “ can’t? r chairs, following the plow, or Listen! A wonderful free book ha ng schools in the rural districts: Copyright, Lamierc “¢ ntly be en writte n on this ve ry su! . a ago ® oe d old, by s _— Miss Helene Chadwick, versatile i© > 3 “ c ook that felis all Fee t 7 pounding typewriters, or standing }| gcreen star, now leading lady for Tom | | Ste otaruing sve eanwy counters running spindles Moore of Goldwyn Film Company, says Method of Writing Stories and Photo tories, bending over sewing ma- a plays Ti mazing book, called r doing housework. Yes—you Nn ” ae fg serine warn ents “The Wend Book for Writers,” laueh—but these are The Writers ernie tadadl alten oe manne P ; shows how easily stories and plays a To-morrow : ce eived, written, perfected, sold, H itin isn’t only for geniuses " nany wil don't ream they can write st people think. Don’t you believe the Creator gave suddenly find it out. How the Scenario Kings and t! a Story-writing faculty just as He did the greatest Story Queens live and work How bright men and ? Only maybe you are simply “bluffed” by the women, without any special experience, learn to thei t that you “haven’t the gift.” Many people are own amazement that their simplest Ideas may furnish r simply afraid to try Or if brilliant plots for Plays and Stori A ~~ 6Sm os | LETTERS LIKE THIS they do try and their first Imag nation may provide an et te Ss Rt i-r ine of Tce as ARE POURING IN! efforts don’t satisfy, they ee t bri H y Success at Hane ome Ca , Roy alti “Of all the compositions simply give up in despair, How 1 res . er eae ee How to T have read on thieseubject, and that ends it T hey're tell if ’ write He vw to deve p your a, I find yours the most help- through. They never try fancy.” weave clever word-picttires and unique. thrilling f aspiring authors.”’ again. Yet if, by some re t plots H yor friends may be your worst pot ~-4 lucky i hanc © the M I ad a 4 Is s - - be - e 1 discouragement and the pitfa!l f Pr “TURE MAGAZINE lea mee tne simple B - 0 7 Banco ae ackt te ahestatety free. _— % With this volume before writing, and then giv the , , Your jc waiting for you. Write for it new 7 Pat ‘a 2 eaaild Imagination free rein, they Get it, [t's yours, Ther ‘you can pour your whole soul 4 . e able to buile might have astonished the this magic new enchantment that has come into your life—stery ctories or photoplays that world! and play writing. The ture of it, the love of it. the Inxu ; find a ready market, But two things are es ° f fill your ted hour and dull moments with profit The best treatise of ite kind = £5 2 en 2 “ : : : et ce a I have encountered in 24 tial in order to become a ind pleasure a ¥ A oS Oe ee ont : ears of newspaper and lit writer First, to le rm the i cantenie g witl > vr recular 3 ? wr ‘—— 38 can’t mal rary work.”—H. PIERCF ordinary principles of writ- ; wit? W : you can’t tur W StL. Degas See. ing Second. t learn to t ght ¢ ae ¢ veur dreams come Press — {TON exercise vour facult of true Not vi w but the book will tell you : When T first saw yourad I hint Ing By ex Tasng ® S a. hy an t the > hel Pc i not ‘buying oma fr I was working in a shop for thing you develop it Your one’s getting 1 absotutely free \ book that may prove ti $30 a week. Always having Imagination _ is something Rook of Your Destin 4M Rook through which men at worked with my hands, I like your right arn The women young and old may learn to tum their snare hours int doubted mq ahilteyto make more you use it the stronger cash! | ur letter in the mail before you sleep to-night. Wt t was with muchskepticiem it gets. The principles of kr ous b+ ‘=e ane ft “y : ~ the Daw f a New To-morrow! that I sent for your Fasy | Writing are mo more com- jy:¢ address The Authors’ Press, Dept. 111, AURURN NY Method of Writing. When plex than the principles of es ae) fig mrem arrived. Tare. | spelling, arithmetic, or any THE AUTHORS’ PRESS, Dept. 111, AUBURN, N. Y. ufterwork. Withinamonth | Other simple thine that any- = cong me ABSOLUTELY FREP “The Wonder Book for Writers.” 1 had completed two plays, body knows. Writers learn This does not obligate me in any way. one of which sold for $500, to piece together a story as the other for $450. TI un- easily as a child sets up a SEARED cinkc .-toebnbncocdnctonnesnncenebeonensnesnnnensoeséas<enennbees hesitatingly say that I owe miniature house with his toy , weleethe rvinetomtem” | Blocks. Tt is amazingly acy —AdAra® eenoee ' | - rie Crry. NJ. after the mind grasps the simple “know how.” A Iit- a sdieelaionss

Page 188

“Look At Him Today!” ‘Six years ago he started in here just as you are doing. Now he’s General Manager and makes more in a day than he used to make in a week, ‘Lhe first week he was here he began to train for the job ahead by studying in spare time with the International Correspondence Schools. Inside of six months he got his first promotion. You've got the same chance he had, young man. Follow his example. “Take up some I, C. S$, course rightaway. What you are six years from now is entirely up to you.” This is the story of thousands of successful men. They did their work well, and insparetime, with I. C.S. help, trained themselves for advancement. ‘That’s the thing for you todo. Whatever your chosen work may be, there is an I. C. S. Course that will prepare you rightat home fora better position with bigger pay. More than 100,000 men are getting ready for pro- motion right now in the I. C. S. way. Let us tell you what we are doing for them and what we can do for you. ‘The way to find out is easy, Just mark and mail this coupon. OUT HERE S88 eeeeeeeeeseeeeeres: INTERNATIONAL CORRESPONDENCE SCHOOLS Explain, wtieine pg a goes I can yee = the position, or in the subject, before which I mark X. ELECTRICAL ENGINEER Electric Lighting and Railways |}Electric Wiring Telegraph Engineer Telephone Work MEOHANICAL ENGINEER Mechanical Draftsman Machine Shop Practice Toolmaker Gas Engine Operating oe OIVIL ENGINEER L) BOOKKEEPER Surveying and Mapping Stenographer and Typist MINE FOREMAN OR ENGINEER Cert. Public Accountant STATIONARY ENGINEER rRAFFIC MANAGER )Marine Engineer Railway Accountant Ship Draftsman 1.) C ommercial Law ) ARCHITECT Oc OOD ENGLISH SALESMANSHIP ADVERTISING Window Trimmer Show Card Writer |Sign Painter ja Railroad Trainmao Lj {ILLUSTRATING .) Cartooning Opt SINESS MANAGEMENT ™ Private Sec retary Contractor and Builder OT eacher Architectural Draftsman Sc ommon School Subjects Concrete Builder CIVIL SERVICE Railway Mail G lerk AUTOMOBILE OPERATING jx Auto Repairing Structural Engineer PLUMBING AND HEATING |Sheet Metal Worker Textile Overseer or Supt. Navigation HF paoish CHEMIST -) AGRICULTURE French Mathematics (J Poultry Raisiag E(_ Italise Name — a Present Occupation — Street and No - _ 7 — City__ — eal ——, Canadiana nay ecnd thie coupon to 7-26-18 International Correspondence Schools, Montreal, Canada POPULAR MECHANICS ADVERTISING SECTION You Can Earn $100 to $150 a Month as a “New Way” Typist an, Expert typists are wanted by employers everywt enough to supply the great demand, Splendid salar to $150 per month— paid to rapid accurate ope _ typewriting an hour a day in your own home by; ‘ " New Way, and you will soon be ready for an Ex« eller nt p sit fe get ir community or in the large cities. Our Big I let willtell you all about the mnderful opportunities alw aia ieunadiaains cant puxite alee 100 words per mir Valuable Booklet Free To Popular Mechanics’ Readers Chis is your opportunity folks. Just send a card or lette Seve eaktet te acunn 2 es Fells all about « Co @—our small tuition fee—our GUAR ANTEF REFUND all ey paid if the ter 1 lessons do not bring res Tells how hundreds of young men and women like yours increasing their salaries S300, S500, $1000 and more pe Tells you plainly how you can easily do the same. Con Secretarial Efticienc Course given FREE to all st enrolling new. WRITE TODAY. Dont let this cl . by ve mu Want $25 to $40 per week in our pay envelope want the ability that will bring you success. We wil you to get it Mail letter or postal no THE TULLOSS SCHOOL BIG I PAYING HOTEL JOBS OPEN to tr on Your en "178 College Hill SPRINGFIELD, O ‘ ‘ tor FREE BOOK t LEWIS HOTEL “TRAINING SCHOOL, Room 304, WASHINGTON, $20 Hawailan Guitar, Violin, Mandolin, Guitar, Cornet, Tenor Banjo or Banjo UKULELE Wonderful new system of teaching note music by mail 1 uupils in each locality we give a $20 superb Violin, Mar Ikulele, Guitar, Hawaiian Guitar, Cornet, Tenor Banjo or Ba absolutely free. Very small charge for lessons only. We guarar successor nocharge. Complete outfit free. Write now. Nox SLINGERLAND SCHOOL OF MUSIC, ISIC, Inc., Dept. 156, CHICAGO, Copy this Sketch and let me see what you can do with it. Many newspaper artists earning $30.00 to $125.00 or more per week were trained by my course of personal individual les- sons by mail. Landon PICTURE CHARTS make original dra wingeasyto learn. Send sketch of Uncle Sam with 6c in stamps for Sample Picture Chart, list of successful students, examples of their work evidence of what YOU car Please state your ave “Che Landon School of CARTOONING and ILLUSTRATING CLEVELAND, ¢ accomplish. 638 Schofield Bldg.

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POPULAR MECHANICS ADVERTISING SECTION 29 ery LUA \\ Vita lity/ bd MS SN SA \' Nn oy i ak WiALCUE Ys , VIOLET RAYS — a” PT PABA Try This Wonderful Machine 10 Days Free o You can now enjoy the wonderful, energizing, Rid yourself of headaches, catarrh, constipation, th-giving power of Violet Rays in your own lumbago, insomnia, nervousness, neuritis. Relieve This famous treatment, formerly obtainable only your pain from rheumatism, neuralgia, indige stion Git eminent physicians and beauty specialists at high fees, yourself beauty treatments- remove eczema, pimples, black heads, obesity. You can make your body alive with vitality - = your skin smooth and fine of texture, free from blemishes and rough the new Vi-Rex Violet Ray Machine. This new sallowness. Soothe your nerves, build up your strength, feel tt n, SO simple that a child can operate it, applies to thrill of real vigor and “ pep,” and have a clear, unblemished dy all the remarkable, vitalizing effects of Violet Rays. complexion. All this you can have by the use of Violet Ray yught to you for your personal use, and at a trifling : Not a Vibrator 1's ?stemc"" Try Violet Rays for is not a Vibrator Asthma Ecaema Pains It does not contract the muscles or shock the Harbers' Itch Eye Disease Paralysis — . P ° aan — ,ce Falling Heir Pimples nerves. Its magic rays pass through e€ very ce ll Blackheads Hey Fever Rheumatiom and tissue, creating “cellular massage ”’—the Catarrh padache Sk ise os = . Chitin? “aaa an ieee most beneficial electrical treatment known. It Colds Insomnia Sprains leaves no soreness after use, only a delightful Stipation Lumbago I onsilitis ° : os Dandruff Nervousness Whooping sensation of agreeable relief. Violet Rays are —_ eo a used in nearly every modern sanitarium, hos- is @ partial list of ailments | Pital and health resort. Physicians, osteo- fed successfully with the Violet- paths and chiropractors everywhere use and endorse Machine. them. Like thousands of others, you will be amazed at the quick, gratifying results from Violet Ray treatments. Send for Booklet and Special Offer [| — ——.— — — 7-7-7" ViI-REX ELECTRIC CO., Dept. 26, 'hrough our special, liberal offer, you can try Violet Ray treatments | 326 West Madison Street, Chicago thout risking a penny. Use this wonderful machine for ten days. It Please send me, t tor , 1 do not find quick relief, if you do not feel better, sleep better, eat | ette r, look better, send it back and you will not be out one penny. , ¥© want you to know in detail about the magic action of Violet Rays. ye want you to see for yourself how it has helped thousands of others. | We want you to learn what physicians, sanitar1ums and beauty special- think about this wonderful new Violet Ray machine. Learn how | rt et RK Ma d det t u can have superb health and radiant beauty. See for yourself the erior points of quality of this instrument which attaches to any light- ng socket. All this you will find in this great health and beauty book vhich will be sent you free. Simply mail the coupon or write a postal letter. Do this now, before our special free trial offer is withdrawn. VI-REX ELECTRIC CO., Dept. 26, 326 West Madison Street, Chicago

Page 190

POPULAR MECHANICS 30 9% Double Action ““The Baby”’ Souris Acton, Revolver A Handsome and Most Effective Weapon. Measures but 4', inches Long. Takes Regular .22 Calibre Cartridges The new Baby Double Action Hammeriess Re- $ 50 volver has been produced ¢ reasing demand f nbine small size anx xt igh _— ntial features of Efficiency and Practice ‘ "tis

as the most exper you can bu Ev

safer or better this. A great feature that guards aga charge making it « *s. The illus

ug ly appreciated bt able anywhere d absolutely The The

“ plated fluted barr ‘ The pri ice of the Baby Revolver is only $6.50 sent by mail, AGENTS WANTED

it we at on y * p.pd. to any address ONLY _—

WITH THis ;

SAFETY HAIR CUTTER ; sma t S$ thar n. Cuts the hair any desired lengt tor long. Does the job as nicely before your n rror y u ar ut the ct lrer } ra } n t < be 1 - as an ort —— y razor to sl a e the face or finish arou r % ae n Sa s its cost firs $ time

St ! Lasts « ed PRICE. ‘ONLY. 35c, goctpeid. Extra BI ad JOHNSON SMITH & CO., Dept. PM 19, 3224 re ‘Halsted Street, CHICAGO THE U. s. — TANK ar with real Yankee —by its own power rs - remarkable Toye vented. By drawing the backward either wit hand or ove and then will craw obstacles, in the Tank

hanical s tank will keep " ten 4. longer than the ordinary run of toy tt i amusement tt

‘ Pr ce only 35 | $3. 00 by the denen, postpa rice MAGIC FLUTE Wonderfully Sweet Toned and Musical Ma

ie am at is a ur e and 1 mu sical instrument at is played with nose and mouth combined T ; A VERY striking and uncom mon ring. Silver finish, skull i ~ ne design, with two ms spark i lashing ge ling out of the eves Said by many t to ring Good Luck to the wearer hence its am Good Luck Ring. ee — you will take rprising le earing. ONLY 25 CENTS. it - 25c Dp JOHNSON SMITH & co., Dent. “PM 9, 3224 North Halsted Street, CHICAGO Make Your Watches, Clocks, Etc., Visible by Night The very latest discovery in the

scientific world litherto, prac tically unobtainable except at an exorbitant price, we have at last succeeded in producing thle remarkable I.U) MIN¢ , ~ P Aunt, h. applied to

a surface o A mits rays of white lig re rtectly = in the dark THE. DARKER THEN IGHT, THE MORE RILLIANT it SHINES . simple to use ny - t BN ' » the dia watch oF clock, ll sat the; at

buttons or switch pla s, and innumerable other artic les nous Rosaries, et mas ‘vottle, Kt). rreare Pri oo per box Oc sea. JOHNSON SMITH & CO., pmi3. “3224 North Halsted “street. cilcaco All the Latest S | Surprising and Joke Novelties Dept.

Pharo's Se its Eges Mesme ized Penny (defies the law Miniature Wate r Pisto 1 | gravitatio 20¢ Cleopatra’s Snake ‘very lifelike 1 Sinctes ous Tumbler and Vanist False Mustache (fool your friend t ing Coin Trick . Automobile Puzzle (Latest 20 Magic Plate Lifter ysterious Ghost, shines at night 1% at Burglar Pu tle. si Rubbe *r Dagger (sensational 2 € rzzles, 12« different $2 & ls yackroscope (see behind you lic tlec-Trick Push B on . oa (re St Mind Reeding Mystery Cda. 10¢ Inkleas Pen (writes w i wate . 10¢ Thurston's Mysterious Trick Cds. lOc Imitation Bed Bugs a Ray Novelty 10 Rguirt Bing Trick Pe ne ~| ; wan Wat

ch Rubber iplying Billiard Ball Trick” JOHNSON ‘smith a co., Dept. emis 3224 North Halsted Street, CHICAGO Please M f Popula Vechanics ADVERTISING SECTION

LEARN TOB i. UTO Trcic:

6 to 8 weeks’ 10 fo al o*400 here laMonth you to immediately accept a big paying position as a Trained Mechanic, or you can easily start a profitable busine right at home, repairing your_neighbor’s Autos, Trucks, Farm Tractors and Power Machinery Learn Easily and Quickly We can train any man,

young or old, in a few short wee Personal training under same Mast Mechanic Instructors who supervised training 5 ay) of thousands of Soldier Mechanics. New WZ wy; est and best equipment ever used f training purposes. Cometo Kansas Cit —"The Training Center for Motor Mechanics.” SPECIAL RATES NOW! Write for informa FREE tion and 15-day Trial Offer KANSAS CITY AUTO & TRACTOR SCHOOL Dept. 782-A, Lydia & 15th, KANSAS CITY, MO. today

| hears “Expert Auto Painting There is Big Money in expert painting and refinishing. Our Practical Auto Painting wil! ena to turn out work of the very highest a Endorsed by leading factory paint men. Wonderful opportanity for N money-making business FREE booklet tells all about this big business. Be first. Write CHICAGO COLLEGE of AUTO PAINTING Dept.16, 20 EF, Jackson Bivd.,

Chicago, | A

Cartoons, Co

tom! mmercial “ paper and Magazine Illustrating tel Crayon F craits and Fashions t m ; become famous Our « e method quickty develope spare time. By Mail or Local Classes. Write for terms and list of successfu ASSOCIATED ART STUDIOS 87-B Fiatiron Building NEWYORK Learn Music At Home! Special offer Fz Banjo, Mandolin,

asy Lessons Free— Piano, Organ, Vik Guitar, Cornet, Harp, Cello, or to sit ,

pay only for music and postage— which is small. No ext Beginners or advanced pupils. Plain, simple, system Sixteen years’ success, Start at once. Send your name get free booklet by return mail. Instruments supplied needed, cash or credit. Address U. 8s. Se hool of Music, Brunswick Building rk New Y« City.

Making Trials of True Tone by Tune-a-Phone Capitalize YOUR Ability THE WORLD PAYS FOR SKILL profession making money It Our Correspondence Course with tools This offers unusual is uncrowded, now opportunitie f your time 1s and the Tune-a-Phone, our patented instrument of precisi make the seemingly difficult easy to understand anyone. Diploma given graduates. 16 years of succ¢ correspondence teaching. Write for free book. NILES BRYANT SCHOOL OF PIANO TUNING 107 Fine Arts Institute, Battle Creek, Michigan | your 0 wondertf rT ! sound, }

Page 191

” ‘Just Send Me |

Free POPULAR MECHANICS ADVERTISING SECTION 31 Proof That I Can Make You a Star Salesman Your Name AN 1) I will prove to you at | can make you a rAR SALESMAN. atter what work you e now doing, whether you er sold an article in your I can teach you the et that have brought and financial inde- t ience to thousands of en just like YOURSELF.

Earn $3,000 te $10,000 2 Yea!

You men who are struggling along in small-pay jobs, hoping and striving for success, I wish you could be here with me for just a few moments. | could show you how thousands of men = yr every wal of life have stepped to big paying positions in the selling end of business. They simply wrote to me and asked for the same free proof r want to give you. They fol lowed my advice and today are earning $3,000 to $10,000 a year and more. Many drive their own cars, own their own homes—have plenty of money travel about seeing the country and making hosts of influential friends. They have learned the secrets of successful selling. They are Star Salesmen. Get Into the Selling Field

Read These Amazing Stories ofQuickSuccess Earning $92 a Week . * A tte r . « a Learn to sell! Then the whole wide world will : Sia in aaa 1 - th ’ r Employmer I be your workshop! Miles of interesting travel | a carving 892 0 week. —b. ¥ meeting new people, learning new ideas, contact with N. sgcdascaai big problems every day —this is the fascinating life the Earned $524 in Two Weeks Salesman leads. No routine —-no grind ust like a long a hed mover anrucd aner< $60 « continuous vacation compared to the average work And — pe . ‘eg — oe the Salesman is the best paid man in the world de me. —4is W. KRARNS. Don't think that Salesmanship requires some rare gift that P $s. 000 a ¥ Year few possess The principles of successful selling are just 5 was dre s as simple as those of reading and writing. if you have tory kw aw y someone to teach them to youin the right way. Y Il be + eh mm Repeats = . . amazed to find how easy it really i W earning Way ‘ | Will TrainYouin Your SpareTime | °°." 092.2%" And Help Land a Good Selling Job cms aaa i i Now Earn as High as

his marvelous plan you, too, can easily master the secrets of selling by a short per $100 a Day xhtful home study. You dont take a moment's time from your present wor Ju I ; ve eae d a few moments’ time each day in the study of the N. S | A System of Selli ' - “a he larnest f ll learn quickly the secrets that have brought success and financial independenc« in the | ee or housands poss oO tales Manager is a grad a . . . . at L. Demonts, 1628 igh the N.S. T. A. System you don’t serve a long and costly apprenticeship In a very Ave., Chicago, I rt while you can be ready to step into a sales position. Just as soon as you are ready and lified the Association's Free Employment and Service Department will help elect and secure a well-paid, congenial selling job. And the moment you = ean = a= «= — = 4. 4 @= National Salesmen's Training Association, a Salesman your chances for Write Quick for ou really want to get ahead, the selling game, don't del the Grip.”” The coupon will bri r making money are unlimited. ° Dept. 12-G, Chicago, tl. Free Book on Selling |» 0:5 eo per vies songme | t Grip"’ a f information al he N 4 . . ing and Employment Serv Al ab . if you want to join the ranks of the topnotc! I busine penings for saieeme ay a day in getting this volume, “A Knight of ng it to you. In its pages you will find the I : NAMI! proof that you, too, can be a Star Salesman. Its impelling message has fired he ambition of many men who left the crowd behind and made brilliant suc- l ses in the field of selling. Read how they did it. Learn how our Free Employment Service served ther e wonderful opportunities in an rapidly develop your natu STRE!I nand is ready to serve you. See for yourself i this fascinating profession. Learn how you pmo ral talents and become a master Salesman 1 . National Salesmen’s Training Association, ?3% Chicago, Ill. gy sar:

Page 192

32 POPULAR MECHANICS ADVERTISING SECTION BE_A CERTIFICATED LECTRICIAN ny ae ee | WILL TRAIN YOU AT HOME A real position like this—for you —_———S a The country needs thousands of trained, Certificated Electricians to fill good positions—and at big pay It’s all a matter of knowing how, and I will teach you by my up-to-date, modern instruction. You can learn at home, without interfering with your regular work, by my highly successful method of Home Instruction in Practical Electricity. Prepare NOW, and be ready in a few months to earn your $65 to *175 a Week A Real Opportunity for You Send for This Book Wishing is never going to make your dreams My book, ‘‘HOW TO BECOME AN EXPER1 come true. You ve got to study to learn. A man is wort! ELEC ‘TRICIAN, ** has started thousands of $2 or $3 aday from his neck down-—and no more; but there young men on the wav to splendid success A is no limit to what he can be worth from his neck up Cn : . . ee . : sea new edition of this has just been printed. | A Gaines omen Is pena _— the big pay. wit want every young man interested in Elec 1s this training that you need, anc can train you ina few 40 , P ‘ > , ¢ °, s > months. Are you ambitious to make a real success — then tricity to have a copy, and will send you on send me the coupon today. ABSOLUTELY FREE AND PREPAID. Write me toda Electrical Outfit— Free How I Train My Students > ry r yr To every student who answers this ad I am 3 ae at ag er — . a Engine e ring giving a Splendid Electrical Outfit of standard size, Ele orks 1 Know exactly the kind of training a trical Tools, Instruments, Materials, ete., absolutely free. man needs to enable him to get and hold good positions Furthermore, to every Electrical Student I gwivea truly and to eart big pay. I ha . trained h indreds of men valuable surprise that I cannot explain here. who are holding A oe ndid , — trical position Many ar now successful Electrical Contractors. Free Employment Service I give each of my students personal attention ay and a complete and thorough training. I giv I am continually receiving requests him a SPLENDID ELECTRICAL OUTFIT FREE, and from employers to send them trained much of the training is done by actual work. Whenn Electrical men. I assist my students to students graduate and receive their Certificate they ar« . secure good position I keep in touch ready fora real position. But still more, at any tine yo with them for years, helping and ad wish you can come to our plendidly equipped apa trical visings them in every possible wa Shops for cial training. Noother school can give mu thi WRITE NOW—DON’T DELAY Delay never got you anything. Action is what counts. Get started and get started now. Write me, or send me the coupon, right NOW LN. L. COOKE, a om chiet treesr” Chicago Engineering Works > Chief Engineer COOKE, Dept. 16 1918 Sunny side Avenue Chicago, Wi, Str: Send at once fully pre paid and entirely free — complete par- ticalars of your great fer for this month Name Dept. 16 1918 Sunnyside Ave. CHICAGO Addrass QUY.. crcccccccccccccccsccsccecs State \¥ OU — -o | Te | i-T

Page 193

POPULAR MECHANICS ADVERTISING SECTION ‘CLASSIFIED ADVERTISEMENTS WORLD'S BEST WANT AD MEDIUM Advertisements in this section, 24 cents per word, each insertion, minimum 10 words, payable in adwance To be inserted under proper ciassification in the July issue, copy should be in our office May 25th

AUTOMOBILE SUPPLIES TOMOBILE Paris for all cars 50¢ ] RETREADET a. « on off el list price Buick Max- | vice = \ ; 0x 1D f d t Guaral I Cadilla Part R $ ; $ $ 6x I > a Guarantee ffet St ikers, Fla $ ( $ { $ ™ process la M ! Chal $11.00. 2 r c.-O. 'D. o , t Ox 5 Bt ksons, It ates, Ma tate Qs! ght side o 2x x " ‘ Stearns-|} ht Ra : tie i “ash accon 8 x4, $8.50 perial Lzxington, Moon, Hud I ' rele Also ‘ discour ‘ xt > O00 Xie sons, Everett Stutz Rev IX ise Huy I ine of Ne $1 0 x $ ) mobiles Bergdol!s Ohio Ve Dorri I t a I we ‘ tire “ : 5. Tires shipped | Speedwell, Halladay, American-Underslung tubs _ , t Tubes a % ‘ é mination. Send | Elear, Haynes, Marmon, \ Alle I $ ' i be se e fv w ill mans tional | Det ‘ M ‘ r kK Biv ] jafte | State vi ' th Wa ( ase wnd oy y otl v \ b Branct ! rims kid « Pistor ‘ ne rod m al t 1 West - N ¥ ! g l «* axles, ix ' a r \ on genera ‘ (halmers ae) pee ee BULL-DOG Int Tires molded to generators end start val - your casing Practically elir ites Blow +. ur i "2 ° 4 a ty , “A outs and Punctures Doubles the lif f ie - . . ne —_ your tires Wonderful seller and repeat e — . r : 1 order gette Write for particulars toda ~— ; Au 2 ane i : p ~ Agents making $5,000 to $10 000 a year Orde “ - mm Chev parts fror u : Fasten Auto Specialty Co Dept A dete a eee : xy wrt ta \ The original and best cold | Utica, N. 4 i your ms _statir g patch for nner tubes rt l ir A Wa ad and permanent $1.00 kit MATS Body Polish Rest 4 Se h + > cover sea epair sent any Nationally advertised ar ia 1 tra t We a | t f price Vulpanize and and leather dres i t ‘ e ' W Kk Spencer Co 1 Park contain ar grease or \ a har } r ‘ } k y 4 t mud amd reast a a ar , to , es Polish Spray it on and | & Parts ¢ Cape Girard M ¢ vs here There is quart can enough CARBON Remover I or » § t 1 ts you eal make Price Or 1) " Sat , ‘ " th wen proposition onl ne bac if t 4 ~ ‘ } 0 t lars addre I ir Special I t INsI - Dallas, Texas eclal J ' , f gents at 1 Sal Cor i 1Ol ) Parts for all cars 50 > : 4 t t ft t i : a ll a eee pany, 1142 8. Michigan Ave., Chicago, II Ana oa - ‘ Mo of Ca Parry, Regals WHEN your motor loses power, whe ha ' I t Age Jeffery Studebakers F anders, it knoe bucks and overheat d ¢ start inted ¢ 1A Overland Mitchel Chalmer monkeying with the carburetor: Send Or lac i ‘ Ja ms Interstates. Mari ns Dollar for an of Labricant, Cart I Yor " | M ‘ Stear Knights, Ramblers over, Prepaid: Salesm« wanted. ¢ rut , . ~—_ Imyx Moon kee Spec Ity Co Che oe Iowa elir Th * a I ae Dessia _AUTOMOBILE Repairing Made Ea ag ener r rT Underslu The n needed and useful book ! aut rn \ . i . « 4 reve as Allen Pul n vritten th b> of P 1 : . ° . kine every pha of 1 ' 4 or I : at ter, Mara re] Letice Uh 6 pages (514x8 i rin W We } \ Case and many others. > ‘ ( necting rods, cam shafts, crank 1,000 oat oth. Price $ At “heape en-s linders axles. beat » gs and geal paid, Popular Mec han ies Book D , lial , NY Seen ‘ ‘ ' N. Michigan Av Chicago ° ret 6 : , a. r new rear axle and transmission roy oO 1 iny make car Write us you VULCANIZER Western Dri-Kure r t and atisfaction guaranteed treading equipment curing casings size NEW I part i or tir 4 + Compan Sales Department, to 6”: practically new at genuine bargai and tut mal vf M Glenns, Grand and Pine, St. Loui M Write } enn I> . = : Akeley ¢ 4 . } Direct to You Prices. Exclusive REBUILT Tires Guaranteed for good = — ve wanted each locaNty to use : aw atone ' Ries FROM Ca n, I to Canton, Chir service \ Olutely puncture prox BR the new Mellinger Extra Ply shveme Extra heavy Ox sire ¢ 100,04 ! fo { ' use on » seconds) Guarantee Bonds 8,000 axle. $7.04 39x32! $8.50 x4, $9.00 wonderful cata es 6 to-Duy tt N Sample Sections furnished. Mellin- 24x4. $10.00: 35x41. $11.00 6x4 Tir 1 Aut \ The catak ( ompany Kansas City, Mo $12.50: 27x5 "¢1 00 ‘Big saving on ene and service { . free ios $; A;ANIZER for shop use Vander sizes and tubes also. Trade in your old the asking Ww this ensatic 1 Springfield, Ohio tires. Discount to dealers. 1f deposit | Money Saving 1 ay— Nov Das AUTO Top Roof or Seat Covers, $7 and required on C. O. D. orders. Send for list Stem Company, Ct I Parcel rost prepaid, Easy to apply now State size and bead of tir Max BLUEPRINTS—0 ( . for s of. cloth free Auto Equipment Liben & Co 205 BR. West 48th St New matures of Automot ~ , Cleneratu , > Canal St., Cincinnati, O York and Motor-Gene See ac nde \UL@ANIZING auto tires growing and GREAT Sale 50% off on higt > ble ‘ < om ‘ ble usiness, especially now Easy Standard make tires (seconds) and tubs MAGNETOS, Cx Sta Generato rm Instruction book $1 Plants also great bargains in used tires Give Distributor every make stock ies ; up Catalog Free Equipment Co ' a trial and satisfaction uaranteed Repairing. Quick Service Write for al St Cincinnati, O $1.50 must accompany each tire ot bye alog Box Magri a ty Wr Repair Manual ts )6©an€§6 «Expert rdered Special proposition to deal Meinert Magneto Specialty Co i Pr op Course—Postpaid $2.00 Tire Voleano Tire Co., 2152 Michigar Ave peet Av C levela Y Equipment Co., 781 Johnson St.. Chicago FoR Y 0 Ba and $20.00 w ’ Wis AL rOMOBILE Ignitio Starting and Nv ll repla e a O-9 battery wit! ue SYDBP Tyres, inner armor for autom¢ Lighti New book on ele al eau Radiur Batts s M t Cuarant tires, double mileage and ment of the modern automobile ‘ } Send five ‘ batte ha tates res and blowouts Quickly tains wiring diagran and r ls of a | ' dolive Milwaul at a little Demand tremendous important ystems Hel you at and | ©° M = Ww ted Details free American Auto overcome troubl 760. ages 180 NICH Spee M ¢ owe Accessories ¢ Dept. P-2, Cinein- Price $3.50 postpaid P pular Mechanic | waiting “ ras Rook Dept., 6 N. Michigan Ave., Chicag W j :

Page 194

34 POPULAR MECHANICS ADVERTISING SECTION HYDRONTZER: sumes earbon, power and Insures clean plugs, con- saves gasoline, increases speed For Money-back guarantee Big agetits Free literature Frie facturing Company, 2932 West Chicago LEARN Yule anizing >; big zy money: ma chine furnished, « — yw or credit. Your op portunity to become independent. Write for particulars. Milwaukee Auto Specialty Mfg. Co Milwaukee. Wis. Use self-cured permanently to easily applied The Ben s Big Tire Ques 's Boulevard, tedt Manu Lake Street, DOUBLE mileage assured! blowout patches. They weld are extra strong, outcome of year's pr actice Shop, Dept. C, 378-382 Winfield, Long Island, N. ~ PAINT your own car, ‘s Use car next day Choice nine colors. Free booklet te'ls how Auto Namel Co., Philadelphia, Pa shoe,

AUTOMOBILES

to the Automobile business as hauffeur, garage manager, me Automobile instruction in four ce course. Send for booklet Side Y. M. C. A. Auto West 57th St., New York PATENTS—Write for our free took and Evidence of Send model or sketch : your invention and we nion of its patentable nature. references. Prompt service. Reasonable Victor J. Evans & Co., 185 Ninth, ngton, D. C INSYDB Tyres bile tires, ctures ‘ost little. nlimited mobile nati. O BUILLD illustrated Conception inner armor for Automo- double mileage and prevent and blowouts. Quickly applied Demand tremendous. Profits Details free. American Auto- Accessories Co., Dept.. P-7, Cincin- Garage. Complete $1.00. Order to- Laufberry Ave., New Jersey. your own ns and specifications, ‘“‘Wecastor’ 61 unswick, New

TO FORD OWNERS

FOR-A-FORD Spark Plug. Factory Equipment but with jacketed porcelain, Develops more Power in your Engine—-Saves Gas——and the Dou- ble Porcelain doubles the life of the plug. Guaranteed Nationally advertised and sold for $1.00. Our special introductory price for set of four, $2.50, Sample plug, 75 cents. Postpaid. Special proposition for agents. Universal Distributing Company, 1142 8. _Mic higan _ Ave. . Chicago, THIS is what you need. in the door of your Car. Install it your- se We furnish everything necessary Brand new. Nothing like it on the mar- ket. Thousands have been sold. A most practical and convenient accessory Also ether needed aceessories, Write for list. Detroit Auto Door Pocket Co., 37 Harri- son Ave., Detroit, aaa TISCH Timers—Entirely new applica- tion of the Wipe Contact principle. Svark net. affeeted by oil, temperature or miois- ture. No oil required. Price, $2.0) each at dealers or write Tisch Auto Supply Co., 215 Division Ave., S., Grand Rapids, Mich. WANTED— spare time to sorber; several profits for sorber Exactly like double water A handy Poe ket Ford Car owner with some take agency for Shock Ab- counties still open; big active man; some Shock Ab- dealers now selling and attaching from 3,000 to 5,000 sets per year at a fine profit Write for proposition. Tri Continental Corporation, 2665 Main St., Buffalo, 5 4 FORD Radiators from factory to con- sumer, $18.25 guaranteed. American Auto tadiator Works, 500 Rush St., Chicago, Tit.

“SURE Hit Timers” $4.00. Something different and guaranteed in writing for two years when used with the L. W. Juice Plug, $3.50. (Not a spark plug.) Roth sent prepaid for $7.00. If not more than satisfied with results, we will cheer- fully ‘refund your money. Omaha Acces- sory Company, 1018 Douglas Street, Oma- ha, Neb. YOU can. buy your Favorite Tires and Tuhes direct by mail at wholesale prices and Eliminate the Dealer’s profit. Don’t purchase another tire until you receive our Free Wholesale Price List o , New Standard Tires. Write immediately = *.ron Tire Sales Co. (Dept. B.), Da vs *+t, lowa 7

OUR Ford spark plug paid Agents Co Clyde, FORDS Carburetors. made solutely wanted, son _Ave., _ Spark troubles. wanted, a Intensifier Sample Write ends all $2.00 pre- Glover Sales double the asiest Double the power. guaranteed Free York Sales Co., Detroit, Michigan, FORD Car Repair Book sent free. complete, well illustrated, valuable explains in a simple way the Causes and Cures of Overheating: Repairing Ford Timer; Curing Piston Ring Troubles: Car- buretor Adjustments and Repairs; Connect- ing Rods; Transmission Troubles; Care and Repair of Kear Axle; Stopping Axle Grease Leaks; also covers practically every other phase of Ford Car repairing Send coin for three months’ trial subscrip and get the valuable repair book Ford Owners’ Magazine, 499 Mont Ridg Milwaukee. Wisconsin patent lenses and illumination to comply with the law Our deflectors comply with all state laws and increase your light. Two dollars for samples and wonderful agent’s offer. They ell like hot Cyntho Co., Box 476, Seattle, Wash FARM with Y« in 1 The Adapto Ford a tractor and a anteed to be as Picard carburetor Satisfaction ab- trial. Agents 1517 East Jeffer- e mileage w starting with e. This book mery DON'T use ywour sacrifice cakes. Ito 2 days work Tractor makes your power plant. Guar- represented and not to injure your Ford or your money back. Agents wanted Write for free circular Geneva Tractor Co., Dept. P., Geneva, Ohio. EAGLE 3odiea for Cerroll Chicago, ur Ford. ~ Ra cir oy Motor and Speedster latest design 6016 Broadway, Sport Chassis, Company, “THR Litl | Shofur’’ safety steering de vise for Ford Cars, operates without coiled springs, bearings, cams, or other wearing parts. Thousands sold and only $3 each Agents wanted everywhere. Powel Crosley, Jr., Sta. A, Cincinnati, Ohio, 200% MORB light with both : headlights burning. Install a 4-A Equalizer and Dim- mer on your Ford. Not a plug or socket device to injure magneto and burn out globe, but a scientifically constructed in- strument successfuliy sold and used by thousands of Ford dealers and owners for several years. Guaranteed to ouflast your car. Don’t buy a cheap inferior makeshift, imitation or substitute. Insist — get the genuine 4-A Dimmer Fqualizer Order direct if your dealer can’t supply you Sent prepaid on receipt of $6.00, retail price. The 4-A Products Company, 3100 Downing, Denver, Colorado. INSYDH Tyres, mobile tires, punctures inner armor for ~ Auto- double mileage and prevent and blowouts. Quickly applied. Cost little Demand tremendous. Profits unlimited. Details free. American Auto mobile Accessories Co., Dept. P-8, Cincin- nati. O. AF-FORD-ABLB Jr. . ruck unit for Fords. Profit by doubling the capacity of your Ford. Utilize Ford Eoonomy—<arries the load at Same Speed and at Same Cost. No change in Ford mechanism. Descriptive circular on request. Affordable Motor Truck Corp., 1154 N. 16th St.. Omaha, Nebr. MOTORCYCLES, BICYCLES & SUPPLIES MOTORCYCLES at half price. want an Indian, Harley, Reading ard, Thor, Excelsior—single or twin—at half price? We save you 50% or more, Good machines $40 and up. Every ma- chine expertly rebuilt, tested. certified per- fect in every part—guaranteed. Better buys than new machines. Send 2 cent stamp for our “Spring Bulletin’’ of rebuilt motor- cycles. Western Supplies Co., 359 Hayutin Bide Denver, Colorado and retmilt Indians, E Overhauled and tested by ex- perts Guaranteed and shipped on ap proval We save you big money. We fur- nish Bank References Send stamp for Free List. Floyd Clymer, Dept. 1. ‘“‘Larg- est , Motorcycle Dealer in Western Amer- ica,”’" Denver, Colorado. BIG Bargain, 1916 Harley Twin, excellent condition. $125. Box 14, Boston 21, Mass. ~ BICYCLES $15, $20, $25. Second-hand Repainted Coaster Brake. Liberty Cycle Co., Beaumont, Texas. MOTORCYCLE cylinders reground, fitted with new piston and rings, $7.00, guar- anteed. Muncie Piston Co., Muncie, Ind SMITH Wheel Auto, $65; fine condition. Vv. Tegge, N. J Haddonfield,

Do you Stand- Excelsiors, Harleys

ne YCLES, Bicycles, Motor m Write for sig Bargain Farce in stock to fit all motorcy: pars at big reduction Expert Henderson Mot rs our spe ialty Motor Cyele ¢ Chicago GENUINE Excelsior and Parts—-We are distributors in territory for the ahove carry a full line of Twenty-four-hour service guar you want real service try us too large or too small Manufa Kellogg Efficiency Valve Twols loge Mfg. & Sales Co, 615 St Bridgeport, Conn USED and New leys- Exeelsior, Merkle. Get our prices on your eycle parts and accessories. Kir Motor Cycle Co., 1168 N. King St. Louis, Mo USED Motorcycle can save you from $35 to $50 torcycle you purchase of us model Machines, ail makes, $25 yu fr catalog Myerow Bros., 258 ¢ Ave Boston, Mass DON'T until comp parts at Parts for India Pope Yales Buyers, Attent buy a Bicycle Motor At you get our catalogue a Shaw Mfg. Co., Dept. 27, Galesbur BIG bargains in second-hand cycles, $25 up Indians, Harleys Excelsiors, and Merkels. Write scription Howard A. French & ( timore, Md BIG bargains in have taken for special Galesburg, good motor in exchange on new ones bargain list. Shaw M Kansas, MOTORCYCLE Bargains—Rebuilt perts. All makes—Lowest Prices teed and shipped on approval. W; bank references. Send stamp for and new Sales Plan. Floyd Clymer est Motorcycle Dealer in the West ver, Colo. $25.00 UP, guaranteed cyeles. Henderson, ley - Davidson. Bicycles, $5.00 uy and accessories at wholesale. Illus bulletin A free. Ash Motor Cor 162_N. Clinton Ave., Rochester, N pay cash for second-hand cycles. Send description and lowest 888 McLaren A rebuilt Excelsior, India WH Harry R. Geer Co., Louis, Mo. HARLEY Bhipment stamp for Davi''son parts a t made within ten hours circulars of rebuilt mot and side cars including Harley Da Indian and Excelsior. Guaranter shipped on approval Return mas not satisfied. Liberty Bonds accept: full face value. Wisconsin Cycle Sales | 726 National Ave., Milwaukee, Wis. est and largest dealers in the Nort MOTORCYCLE cylinders reground, with new piston and rings, $7.00, ; anteed. Muncie Piston Co., Muncie LATEST Side Cars” all colors, axles, fit any : eyele, at bargain prices, while th stock lasts. Motorcycles, side front rear cars; vans, $25.00 up: engines, $ up. Full presto tanks, $7.00. State your requirements close stamp.) Erickson, 8039 Parne! Chicago. FOR Sale—Cycle Car built to ord owner, 20x4 tires. Electrically equipped, 2 passenger speed, racing type body, speed 50 mil hour, all parts standard. No ju real car. Lamberts M. C. Shop, Franklin St., Hagerstown, Md. REBUILT “Motorcycles—New 1920 S List: Harley-Davidsons, Indiana, Excel Hendersons, and sidecars $50.00 to $° Every machine rebuilt and guarante spresented. Write for new folder ‘ Carl W. Bush Co., 517 Broad St, ° ark, New _Jersey. POWERCYCLES, Fifty Hundred miles per gallon. New, con horn, electric lights, $145.00. Rear_ side car, extra. Write quick. C. | Campgaw, New Jersey. EXCELSIOR Lightweight, at bargain price. Van A 16th, Omaha, Nebr. TWIN Harley-Davidson Motorcycle Sunderlin, Victor, Colo, TF you own 2@ Motorcycle write { new booklet “Everything for the C Victor Roos, 2707 a 0 Nebr “Rogers extension

miles an

almost very, 624

fittings, complet Harley-Davidson Mot

Page 195

POPULAR MECHANICS ADVERTISING SECTION WELDING

a save them welding perie areat aluminum welding—'4 reh r solder Booklet on re Used and en- rmy and Navy Laminum New So oadway Iowa, to read then See il Save 20 Canal Pp us any 9

+ for building e $ postpaid Aero Engineers, Trac August I Weight 450 ngth 17° Stick control Will arry two under 2 Parts for Builders nable prices Plans and iilding your ow ma ation Directory Law tor Now for biggest, best catalog Aeroplane Parts and Supplies. postpaid Ideal Aeroplane uston, New York ce ng Fre illustrated Guide lence of Conception Blank sketch for our opinion of nature Highest references Reasonable tery Vietor J. Ninth, Washington, D TO-ENGINED airplanes 0; assembled, demonstrated passengers planes, $2500 $50 installments. Solar Aerial Blig Derroit, Mich ACETYLENE Welding and and Thermit Welding practical instruction in kman will find all nece for handling V welding, fully illu $1.25: Leath- postpaid Mechanics 6 Michigan Chicago RTISS blu other part ipplic ible Flagg Aerop e (Oo New Salen cents Ww. NTORS should Book Send its pat Prompt Pvans patents 187 motor and $1700 Flight n pire Cutting. Brand new this process. ary ifor- Dept Ave OXxx motor print all reason ILD you nstallment ible A Ange FOR ooled motors Harlan, Ia AERONAT and rf propellers Sale 20 with raard gaard, AL stamps) suppl Ost ago plane and Comy Circula ha t BIPLANE xeollent Tuselage tu int Dual ned to save BULLD tomobile for COMPRESSED an aero motor. one dollar rotar thre al made in 2 and steel minum I stamps Co $ SEND lar th HEATH the most aer ank Model for Star Jr Aero Work Co book let needs, l hlet on Fe airplane cago Aeroplat obil« aul ur pal wed ne-drivet to c'T Airplane BUILD ar ( auton atior Tra Minn boats Gr ine Cur All p» Fort Washington, Lon UMAKEM flying Model lars Ir ber ete Small UmakeM, UmakeM Build Complete Curtiss cludes tools outfit

BOOKS AND PERIODICALS

BACK issues of all magaz by Boston Magazine Exchang: ford St toston 1000 ADVERTISING He Showeard Suggestions Wri pert. $1.00 tox 14. Bost MECHANICAT Vocational Magazines ist free. r Agency Middletown, N book on Cement st Sand, Straw and Wood Lumber, How to build dad fireproof house stpaid Peter «de i rare, old, new, ed humorous, ( cireulars free Write today lishing Company tells, Tenn ENCYCLOPEDIA of Tattoology « everything about Tattooing, Ir Prof. Broadbent Pear] St Glover New York BOOKS you want the ordet If you cannot t, send me your li $808 Champlalr structive ata Books, Books book Nat ant BOOKS ge

CUSTLIEST Male Dept HOW al Ruffalo INSTRUCTION Tulcanizing Aut t ‘ ’ ‘* AUTOMOBIT Flectr

GAMES AND ENTERTAINMENTS

MAGIC —S« 1 Innest , MAGIC: Tri we Box 7 BEAUTIFUL cka of all } ale c Re WONDEE Mass. ENTERTAINERS seven istration =~ Happy How i ie de SENSATIONAL « tPUL, Ne : On!

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36 POPULAR MECHANICS ADVERTISING SECTION FREB! Latest Tllustrated Catalog FREE! Jamaica Victory stamp for re CASH paid for stamp colk Pocket Tricks Jokes Puzzles and questing British Colonial approvals includ rent and old S. issues ported Novelties Large, low priced li in latest issues and war stamps Kefer Try my net approvals—Refer . Seiect Card Tricks included ences Riedell, Schenectady, N. Y bert G. Rivers, 1997 Montr . a t 4 » Lyle Duvuuglas Station FOREIGN Mixed 00 5 comin 1000 Paul Minn deale al 0 cents, Approvals. Harland Burgett, APPROVALS 50%, Sets, Pact FRER Our new catalog f Puzzles, Lima, Ohio cer, Toms River, New Jersey Tricks. Games. Jokes, Novelties. W _— & FREE! China 12 = ~ Sow 6 GQ t 1 » ‘eorla il. TRE hina 2 var. with approvals : - it = = : = - ae Write Henry B. Hunt, 5727 Huntington RARE COINS VENTRILOQUISM Taught almost any- Drive Los Angeles, Cal one at home Small cost Send today 2c ~ ee ae NEVER se ) coir t stamp fi yarticularg and proof oO. A STAMPS, 50 Varieties, Transvaal, Brazil, Copyright ; Ilust: “ ly Suiitl Root 1 Bigelow Street, Peru, Cuba, Mexico, ete., and Album, 1c Book (New Editi ay oe Peoria, 11 60 different U. S., 25c. 1,000 hinges, 12¢ no © for 1894 "are TRICKS Z Jokes, Magical Ap - and —~ 7 : —— ee - . [ieee ; paratus reading A ts, Sen t ri ante : aus Missouri sational y *S ! Illusions. Send TI unused ‘re Colonials free to Stamp w for re lustrated 1920 cat applicants for Approvals; $°6.75 CRISP Wo “ 1 Magical Co Dept. 48, postage 2c, Christensen, ord Street, ‘oin C Be my — = alg = Milwaukee, Wis eid emaetce, Texas CALIFORNIA = gold Quarter & size: 35 sc Piece and Cata orman Shultz King City M

200 KINDS f ‘ Wood and Wire l'uzzles. One of ! -aders with secret so- ‘ lution and illustrated list for 10c in ( stamps. Western Puzzle Works, St. Paul, ft ( { 55 DIFFERENT Stamps, Nicaragua, 1 Salvador, Victoria, Brazil, Chile, French nies, large pictorials, album with per- — ~ ration gauge only 10c_ silver Clarence WATCH Your Change Mar ibbs, 9824 Juniper St., Los Angeles, coins are in circulation We |} Alif coins and bills, some as late hester ind 10) STAMPS from 20 different coun 3 5 Lufberry Yalesville, Conn PICTURES, POSTCARDS & NOVELTIES y Minn 150 PARODIES on Latest Son Charles ry \ as Send 4c now for our La Coin Circular It may 1 ! to you Numismatic Bank NEUROPE Packet: 40 different issued Worth, Texas ership List since 1914, 50c. Ineludes Occupation, Tri vy 4! angle and Aeroplane Stamps Jacob F ly Card Ex cher, 1539 North Lawler, Chicago f r f old

YOUR Name ; Mem! 15e Sample r Jo paid for U. 8. Fy } We pay ca coins Si change. Deca ilana - » : 7 8 ; POSTCARDS from everywhere. Join live 0 STAM from Neurope only, $1.00 oad t - ee club. Application papers 1l0c Harvey | Fine appr against gvod reference “le ae 4 ol! tes ~~ Fa Teenie, Decatur, Ind. F Jules E n, 30 No, Court St., Prov- — en 0., Box 19, Le COMIC Postcards They a ream — Shen 3 paid for old b st . t are screams, t ‘Tore 0S an se} or Also pretty Scenic cards. 25—12c, 125— 105 NA, etc., stamp dictionary, list, jum ; Book : Ten. oC “ ex ' 40c, 1,000 for $2.25. Closing out lot. | 2c. Album (500 illustrations), Jc. Bul- | Nickel, Fifteen Cents. E Card Shop, Blk 12, Aurora, Ill lard, Sta, A., s0ston, Springs, Iowa WOULD you like to exchange postcards FREE =o different U_8.,_ with 60% CALIFORNIA Gold ~ quarter stamps. coins (state which), with some of approvals Enclose 2c 100 — eG Columbia nickel ie Villa af 1 our 18,000 members in many countries? | S.. 2%c. Seldenberg, Beecher, atalog, 10c. Write. Homer Shultz Membership, l5e Halcyon Box 133-P, FREE: 35 dandy stamps to applicants for Star ) Erie. Pa. Nifty Approvals Send 3c for postage POSTCARDS, Western Views, Cowboys | Belmont Stamp Co., 551 N. 52nd Street FOR BOYS riding, roping bad horses. Indans, Chiefs, Philadelphia dances, ete. Six for 25c, The Glieds, ae ee and Art Studi Okemah, OkL. -. 25,

300 DIFFERENT stamps’ 50c Fred On- MOVIE Films, 2 cents per foot ken, 630 79th St., Brooklyn, N. Y Stamps for Lists William Batt SPECLAI rwent le I . : JUST Imported—500 mixed Netherland Haven, Conn ented paste Oe ee ee English, France, Belgium: or buropean NEW soys—Sell Stamps, rs ed postcards, 10c prepaid Swanson, > 4 Onn t * a re F free W. H. Dodge, Pasadet 205P Kansas Ave Kansas City, Kansas mixture, 20¢€; 0 Germany 1 O00 4 asadena . ‘ : Italy, 45¢; 250 Switzerland, 40c Prompt HERE shipments. Lists Free Everett P. Emer ol Sturgis Mich : Reys; All the parts and YOUR Photograph reproduce on Fancy - : . . Pillow Tops, Silk Handkerchiefs, Gold Cult ~My EE fh Buttons, Scarf Pins, Mirrors, Et Send y a i Circulet, . a $1.00 and Photograph Samples and Prices THIRTY stamps from thirty different — . 4 —“) & Toy ¢ 25¢ Foster's Studio, 1216 N. Clark countries for ten cents. A, W. Dunning ept.. ewar o. Chicago ; Brookline (47), Mass START a business of your owr FIGURE Studies for art students, 15 STAMPS sent on approval at 70% dis — oe $1 — —, _, — “ beautiful photographs postcard size for $1 count. Reference required. Emory Kenoll, | = © Samples 1X atte or ten 5x7 Money refunded if dissatis- Hanover, Pa co 60 Lagonda Bank Bidg., Spring fled. Tinklepaugh, 3440 Fifth Ave., So. 500 MIXED U. 8S. old and new, 1l0c a “ Minneapolis, Minn Weatherby, Medina. Ohio. TOY Airplanes that fly—A 17-incl ~ SPLENDID collection assured Join the ~ at — - oplane with 16-inch wing-spread , u n ¢ r Joi oT A TP 6 *ollectio 85 iffe sai 7 7> cent Sg remer best Exchange. Many attractive features, START a Stamp. Collection different | paid for cents, Sam K. Krem . on stamps from 65 different foreign countries West Court St Dayton Obie colitests, etc x months’ membership 2c. neluding Africs Asi Australis Europe : ; : List 10¢ Popular Exchange, Windsor inciuding Africa, Asia, Austratia ‘ ee BOYS, Girls, Make money . . ° West Indies etc Our pamphlet which P . . North Carolina *e ime gathering pine-cones. » - —— — tells “‘How to make a collection properly laree s i ‘ Toyland Mfg MOVIE Fans Your favorite film star and price list of albums, packets and sets, arge Sampics to fuyiane My. photographs, post card size for 25c, all for only 16 cents. Queen City Stamp W ith St., Chicago. Mutual Supply Co., Bradford, Pa Co toom 36, 604 Race St., Cincinnati BUILD up a business of your ow Ohio stead of working in an office or f a on " aad nl acd during your Summer Vacation We |} FREE 25 | “ & applicants Large pleasant, healthful outdoor plan ‘ discount on approval, 3c for postage. Ref we ¢ 6.0 ia) AMERICAN Packet Free. Early issues erences required. St. Elmo Stamp Co should net you $4.00 to $6.00 a day Commemoratives Revenues, high alues 4501 N. Ashland Ave., Chicago oo Bg a favorite recré ory % i 9 stamr % r on an¢ Sports 0 soleiting or canvass es ee ne Oily SNE STAMPS, 20 all different, free. Post- | real honest-to-goodness work. No — —— age 2c Mention paper Quaker Stamp ment necessary If you're interested on DIFFERENT South American 10¢ Toledo, Ohio us and we'll tell you how to work Weed _ a ump Co., Centreville, Mich al 100 DIFFERENT stamps, 12c 1.000 business and accomplish the best FINE stamps on approval; 69-80% dis hinges, 13c; album 12e Micheal, 5602 S. ¢. Johnson & Son, Racine, Wis« count . Milton es h, Mt. Vernon, N. Y¥ Prairie, Chicago SENT ten cents for UmakeM Desig > y 7 y Lontt’< ‘rif . , API ROY ALS—(0% off Scott's. Griffin, 20 UNUSED stamps fre« All different start toy business. Address Uma Box 315, Rochester, N. Y Postage. 2c. Fisk Stamps, Toledo, Ohio UmakeM Buildings, New York

STAMP COLLECTING

RES" ne cent approvals in America ss ARIETIES cohen ean 7 aie ¥ I 7 S y) St » é » v7) ve ar a } Lae, Netwhia —— on a a oo List of 6,000 low-priced stamps free. | MANUAL TRAINING SHOP EQUIPMEN er : =e " -- Chambers Stamp Co., 111 P, Nassau St AND MATERIAL yl ee Stamps. packet 5 —_ New York City } used, China ship set 2 searce anima SEK 97 ~ vO Ss ' stamps, large $1.00 United States revenue, PACKET of 2% stamps: no two countries ee l Have you a Saw a perforation gauge, millimetre scale, ruler alike Packet hinges. Set of $1 and $2 = - - - and price lists. All for 9c! Sudden Service U. S. Rev all for Se Mention paper SEND dollar to UmakeM, UmakeM Bu approvals. We buy collections. Fennell Miami Stamp Co Toledo, Ohio. ings. New York, for everything ed Stamp Co., Dept. P., Fullerton Bids., St. STAMPS, 50 diff. British Guiana, China, | ™&ke_ twelve quarter toys, all differs Louis, Mo Jamaica, Portugal, Venezuela, efe., ic; BIG AWariety Packet Foreign Stamps | 1,000, all diff., fine collection in _ itself, CAMERAS AND PHOTO SUPPLIES free for 2c postage Gray Stamp Company, $5.00; 100 var. U. S., 30c; 1,000 hinges, Station FE. Toronto, Canada 10¢ Agents wanted, 50% List free I KODAKERS: How would you like t ~300 DIFFERENT postage stamps, 50c. buy stamps. L. B. Dover, Overland. Mo. _ a %xil enlargement of your best neg Lists free. Nickles, 122 Florida Ave., 158 GENUINE Foreign Stamps—Mexico | free’ Drop us a card now asking Washington, D. C War Issues, Venezuela, Salvador and India | °' . nd — a is Foto "85 UNUSED French Colonials, 28c; Service, Guatemala, China, ete., only . len ey ‘Ween ord’ s 1,000 Variety Packet, $2.95 Premium to Finest approval sheets 50% to enshurg, ash all approval applicants sending reference Agents wanted tig 72-p. list Free , SEND a negative and a dime_ and postage. W. C. Henry, 301 California buy stamps Established 25 years surprise three times the value. Neg Buikiing, Los Angeles, California. man Stamp Co., Dept. 54, St. Louis turned Tompkins, B27, Monroe ‘

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POPULAR MECHANICS ADVERTISING SECTION EDUCATIONAL AND INSTRUCTION SPANISH Port the Ba Kr Mo. WRIT M ng faacinat ALOVI} wklet «& FILMS OUR oF k bu Y PHOTOPLAY . VW ‘ Rex P HAV Machine ATTENTION Tr om r y ACCOUNTANTS

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38 MEN—tearn Wireless at home i: 10 Attractive positions now open for to 45) qualified as radio electricians, mechanics, inspect ciraftsmen Beginner operators now aging $225 per month; no _ previous perience or wireless education necessary eliter Opportunity t travel and see world Oldest and largest radio school in America; established ir 1914 We train you through our correspond course or at our loca] schools to qualify for official license and help you secure position on land, sea and aerial mail Wireless out fii furnished for home practi ree catalogue on re st National Radio In- stitute, Dept, 23% . W Washington Db INVENTORS—Write for our illustrated guide book nd Evidence of Conception Send model or sketch and opinion of its patentable na ghest references, Prompt Reasonable terms Victor J. 167 Ninth, Washington, D “SHORTHAND for Everybody!’ Swift, Certain! Free Lesson, : only Edgar Fuller, 1051 W. Chicago ll SPEND suildings, to make nce 14th and U Sts. N. tost Tires is a Instruct Equipr Manufacturing tion wants capable men to establis! and manage salesmen essary Will allow as explained Address North Howard Street EXPERT Chemical Analysis, Instructions and Trade Secrets lems solved for Lists and Valuable Informatior Cummings, Ph. D ecuse, N. Y¥ Goor spare time silvering Free instructive book son & Co., Brookeville GET in the Tire Bu ent Make $4.000 to tires for miTlion emice necessary. capital required Write today of our co-operative selling plan references Stephens Rubber Co City, Mo WP Start You in everything; men and £100.00 weekly operating our Specialty Candy Factories” pertunity lifetime: dale Co., East Orange. N INTERESTING Tdeas and Information r Stamp D. D. Green, Leslie 0,000 FORMULAS 557 $1.25, Ideal. Book Shop tobey, Chicago THE Mail Order Review Order Journal published. money-making ideas, plans, ulas. Year rf 00; sample l0e, Pforr, Baltimore, Md $2390 to Baltimore Service Formulas money mirrors; no tells how Ky $8,090 a We teach you Business, f women $ page 24 =«Y MANUFACTURD Toilet Preparati 7 te vi 1 Extracts, 200% profit. We White’s Manufacturing Drug Co., |! ifornia Ave., Cincinnati, O. tor Pr Manufacturir Satisfaction guarantees 228 Gordon Ave easily earned a iness te it year dollar factory No Only for New anywhere booklet free Ww FF. books, Money urticu Mic 5501-YT Leadi: Mtrks KR expenses to [alt Treasurer \ 0 schemes CONTROL new exclusive phonogra your Mechani business for Satco ord exchange capital required onta y. ¥. MAKE your own receipts with full i $1 C. Ellis, Dept Soda Fountatir “84. Towell atruetions for al w

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POPULAR .iECHANICS ADVERTISING SECTION Corpora rior Nor ust Sliy ell tew terest Write quicl Company tor Mus- mail how Goods Box ( blue absolutely All work guar- jour Service from t Prepaid tt Royal Dye your dbooks s Is oppor- jus Har ! w big norm« tear mer profits omplet te set, 1] Sell us Breniser Descriptive interesting ma None free ur backyard New Metz, 313 Phil idelphia, g batch n vi No 1 I Fast ex French profit- Barstow lusive ormous! H made s No Swanson in the exper Sons io business Good Interesting booklet National Col Newark, Ohio k results ‘ 4 free Long Street bos operate ‘ line Forms Aller a or less and 2419 real estate than five tructions Caldwell St manufacturing { to any it ony and ed States Zanesville pondence Big list free Mountain to Make Men—and All for only $1 t Jefferson St plasto-marble, surtace Fakes the tile lerritory and Canada Ohio courses 1] Also courses Pisgah Ala Money “How to Rinehart Los Angeles, of a g 20 for Write Sys $3,000 Upwards hance. No capital required. Estate Brokerage thoroughly by the study of our invaluable Sell Real Estate’’-—$5.00 to Conduct Real Estate, In General Brokerage Business’’ Order Now A baolute guaranteed Free catalogue Dept Meveland dollar for Home-she UmakeM Yearly ; atisfac tealty Oblo different " le gns tuildings, New \D eM keM twelve sets of Acdiiress York FORMULAS AND TRADE SECRETS MANU irbon ewing is and FORMULAS Remover Cementles Puncture including Tire Paint Patches, Radiator Top Dressing. Entire collection 2M North Robey FACTURING, aul Informat free Gas Tonic, Vuleanizing stop Auto Tdeal, Seal eS ; Chicago Processes, Formulas Interesting Booklet ‘ he mists, Little on Consulting SUCCESSFI Re: Money making» Trade Secrets Dynes, Winchester FORMULAS 2% For- postpaid, 25¢. Indiana Luminous Paint— veering M (wangeale Powder Dry Batteries—Mechanies’ Se Oil—Egg Substitute— To Remover Puneture Plugger ie Entire collection Ideal Boot 501-FF, North Robey, licago FORMULAS, Trade W wile 4 ; pores ake ar OK an Pa. absorpti last g ver (ok SPR Cold United Coloradkc FREE Tells today tories HIGH Gr RMI Cart rATTOO sure rem ¢) FORM eve = ol LAS business PY Che demand nes Sold arge catalog mical ¢ ack igo CARBON Rer overt AtiSsfactio Marth wor ea ovil 0 Specia IN« remedy) Formula how Ss / Latest «& B BUSINESS SERVICE work money liberal | tree me Co 21, Mass MAIL Mailing Yor HAVE Good e take personal switeht Rates $ 07 THREE Result G tters INCORPORATE 4 you Collection Letter Set, 5 re RB forwarded S effe attention at 296 Broadway) } fourteet > mont? New is Duane York AGENTS WANTED oin ing rubbing. teed Samples ng “pecialty clalty ositions tional writers 132 pages 25e money suilding traveling fr cessities noome work PROFIT monev Compound Exclusive ¥ bp Products C: CONNECT n Salesman to selling Exposes Read refunded Agents, Crew K lean -Rite Vashes Ma Magic lothes Sale of every package territory dD te quick Belleplaine Wast ree Wr 253-Ke Ch with real money -maker { anufacturers ] Ivertise Magazi from talks f select by frauds $2.00 yearly current issue Robert Chicage AGENTS a town and protit to tow! 1 a securing iget withor guaran- stributing Restever ago AGENTS 7 liaht i ow Hold profits Write "tail Enormous ‘ live re ( California NATIONAL maga ar ti evers Wr where qu r urfit, ar to earn Louisy WANTED big r mor week! ts line If perma money expe agent Box big gx your Ales Loc} tailor Manager Make FireX per « R+ B everywhere rea eat ' heia Bide i rablets & Carbon Absolutei7 ike Why Direct tuy in Bulb Hiave agents working your - label We Get_ our_ pr ison St., Butt wildfire AGENTS rhe thing at he band wa big £ to me : Pach istomer Write Whitten St eguilar

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40 WILAAAMS Cocoanut Oil Shampoo for 50e, costs l0c Fastest seller on the market. Entire country has the craze for it. Gold mine for Agents Write W. B Williams, Dept 25, Montclair, N. .« AGENTS— Best seller: Jem Rubber Re- pair for tires and tubes: supersedes vulcan ization at a saving of over 800%; put it on cold, vulcanizes itself in two minutes, and is guaranteed to last the life of the tire or tube; sells to every auto owner and acces- sory dealer For particulars how to make big money and free sample, address Amazon Rubber Co., Amazon Bidg., Philadephia, Pa., Dept. 505 AGENTS make $75 clean washing wonder. peater. Free Skytt, 725 East 1,000 AGENTS “‘Shur-Kleener,”’ compound and day Makes clothes and clean smelling Harmless to the most delicate fabric Cleans sillverware magic- ally Distributing samples free. Sales guar- anteed No fake Johnson, Chicago. made $300.00 first month Write immediately for free sample and special offer Shur Kleener Products Co., 3409 8S. Leavitt St.. Chicago. _ MEN ing Duo sells weekly selling Victor- It is wonderful re- Samples to boost sales. Sth, Duluth, Minn wanted at once, the greatest household cleaner of perfectly pure to sell washing the white fits Sell- Fasy sales time Out- Dept. H1. Enormous Pr Products or spare Duo Co., “or Women Guaranteed at every house All fit free. Write quick. Attica, N. Y . TAILORING Agents Wanted plete sample outfit and case, nearly large cloth samples, 3-price lists and everything needed for canvassing, or use in store, free to live agents, $25.00 to $50.00 a week: may make more. Write us today for free elegant outfit to begin, cloth sam- ples, wholesale prices, special offer on a suit for yourself and full information.— See our wonderful values, beautiful fabrics and styles. Established 28 years. Every garment made to measure—everything guar- anteed and exprese prepaid Just send a postal. American Woolen Mills Co., Dept. 1438, (Chicago = HERE'S a line you can sell! too! Fruit Drinks, Spices, Extracts, Articles, Vegetable Soaps, Remedies. House- held Preparations. Over 125 products, all guaranteed. Branches at New York City, Memphis, San Francisco, Winnipeg and Hamilton give prompt shipping service, low freight rates. Ours is the oldest, largest and most successful agency house in the world. Particulars free Write today. Dept. M.P.-2, The J. R. Watkins Com- pany. Winona, Minn AOE IE Sth sim WONDERFUL New Chemical. $1 pack- age equals 50 gallons Gasoline. Eliminates Carbon. 50% more mileage, power, speed, guaranteed. Whirlwind seller. Auto owners buy on sight. 100% profit. Repeater Dem- ovstrating package, terms, territory. 1fe postage. Myers & Co., 28 Baird, Cam- bridge, Ohio, iene ‘ “MEXICAN diamonds fiash like genuine, fool experts, stand tests, yet sell for 1-59th the price. Few live agents wanted to sell from handsome sample case; big profits, pleasant work. Write today. Mexican Dia- mond Impt. Co., . SW. Las Cruces, N. Mex. ~ BASY, pleasant | work for Mechanics, Shop Men, Clerks, during spare hours; will add many dollars to their salaries. Also want persons who can give full time. Big wages assured. Novelty Cutlery Co., 67 Bar St., Canton, Ohio. AGENTS and Crew selling food specialty. your ‘shel. Write or Food _Co., 2395-G Archer Ave., Chicago. _ AGENTS—Stamping names on Pocket Key Pretectors; sample Check with your name and. address, 25c. Stamping Outfits, Em- blem Checks, Check Fobs, Name Plates. Hart Mfg. Co., Desk 2, 303 Degraw St., Brooklyn, N.Y. AGENTS! Quick Sales! | Big ~ Profits! Outfits free! Cash or credit! Sales in ev- ery home for our beautiful Dress Goods, Silks, Hosiery, Underwear and General Dry Goods. Write us today. National Im- porting & Mfg. Co., Dept. MD, 425 Broad- way, New York. GASO-TONIC will immediately give full efficiency to poor gasoline. Eliminates car- bon. More power. Greater mileage. PBasier starting. Absolutely harmless, Good at all times, but absolutely necessary during cold weather. Gaso-Tonic Company, Cin- cipnati, oO. AGENTS: Big Returns, fast office sellers; perticulars and samples free. One Dip Pen Company, 2 Daily Record, Baltimore, Md, com- 200 Big Big profits Toilet Managers. New fast- Livest article. Packed wire. Federal Pure CALIFORNIA Rosebeads selling like hot Agents coining money; new stuff. profits. Catalog free. Mission Beaa PM-2819, West Pico, Los Ange’es. VULCANIZING auto-tires growing profit- ible business, especially now Kas to learn. Instruction book $1. $50 up Catalog free Equipment Company, » Canal St., Cincinnati, Ohio. MEIN operating Doughboy Portable Cooking-Selling Stands bo $50 daily Beautiful Stands $95 on trial Talbot Mfg. Co., St. Louis, Mo MAN to distribute samptes, circulars, r ‘Foot Ointment.’’ mail or hand; splen- opportunity. Write us today. Ad iresg The Elder Co., 294 Parkdale, Buffalo, New York, DROP Everything Else. Sell Guaranteed Silk hosiery and underwear all or spare time, direct from factory to consumer. Big money maker. Big commissions Prompt deliveries Cc. & D. Company, Dept. 12, Grand Rapids, Mich. WANTED—A salesman in sell our vending machines stores. Salary «and spare time. Write Camden, J AGENTS est window Doughnut earn $25 did each city to direct to retail commission. Full or Postoffice Box 275, and cheap- Easily applied. Particulars free, Second Ave., New York. week, Will show you Leaf Window Letters. 842 Altgeld St., Chi- Big profits. Best letters made. Dime. brings five samples. Staibrite Co., 1115 AGENTS $50 a how. Genuine Gold Chicago Agency Co., cago. AGENTS: Stain Remover. : Sell Neverfai | iron rust and Huge today Profits. Big line. Sample. Write Sanford-Beal Co., Inc., _Newark, Dept. 6. MOST Wonderful Seller. 96c profit every dollar. No stock to carry. License unnec- essary. Sample free. Mission Bead Co., 1617 Trola. Los Angeles, Calif. WBE make the Best Fibre Brooms. Grau 3ros., 1662 Central Ave., Cincinnati, O. SIGN Letters for Windows at honest prices. Genuine gold leaf Chicago Sign System, 326-F River St.. Chicago SOAP ws Send for Free Sample “and Selling Plan. Morgan Supply Co, Dept. 2, St. Louis, Mo. ~ AGENTS— If you fast and easy get Waterproof Shampoo new! Sells in every home. Cocoanut Oil Shampoo free apron. Also other household Get particulars: free sample immediately. Christy, 81 Union, Newark, New York. ~ PATENTS—Write for our free illustrated guide book and Evidence of Conception Blank Send sketch or model for opinion of its patentable nature free. est references. Prompt attention. Reason- ablo terms Victor J. Evans & Co., 163 Ninth, Washington, D. C. ~AGENTS—The Greatest Proposition Ever Offered for selling advertising pencils. Write today for agency. North American Pencil Works, 501 Plymouth Ct., Chicago. LATEST Tremendous Winner: ‘‘Pureka’’ self-closing Gatelatch for any kind of gate: seli like wildfire. Newest, simplest, most practical device, 120% profit. Sample 25¢ po stpaid. | Write Box 463, Alhambra, _ Calif, THE prosperous agent is a Davis agent. Line up for the Big Rush- $49-$60 weekly. ‘Lucky 11” and our 27 other varieties cut store price %4%-%. Worth 150% to 200% for you Davis Products Co., Dept. 506, Chicago. SEND 2 money Christy's Something Big bottle with every necessities, au want to make agency for Apron. postage for free sample and particulars No splashing water strainers. Easy seller. Returns big Experience un- necessary. A. B. Seed Filter ©o., 73 Franklin St., New York. BAR and Ring Pocket Puzzle trick mys- tery, 25c¢ seller; sample dozen postpaid 75e, agents’ sample, lXe. Western Puzzle Works, Saint Paul, Minn. SELL Necessities. Everybody needs and buys the “Business Guide.”’ Bryant cleared $800.00 in July. Send for sample. , — Nichols Co., Box 4-B, Naper- ville, i. MAKB $30.00 next Saturday. rator for Fords selling like wildfire. by Ford Motor cfficials run like a Packard. Stops stalling and bucking. Put on quick—instant satisfac- tion. No holes to bore. Sell ten to twelve a day easy. Splendid profits and exclusive territory. Write quick for information. Address Perrin Co., 1050 Hayward Bidg, Detroit, Michigan. Speede- Used Makes any Ford POPULAR MECHANICS ADVERTISING SECTION BULL-DOG Inner Tires double mileage. Greatest seller and repeat get.er. Eliminates Blow-outs and Punctures. Agents making $5,0.0 ¢ (00 a vear kxclusi.e territory for particuiars. Eastern Auto sy Co., Dept A, Utica, N. ¥ ONE Sule a Day Five a day—$1,000 new Automatic Adding Machine $12.50. Work equals $300 mach.ne Year Guarantee. Write quick for I territory and trial offer. Calculator Dept. F, Grand Rapids, Mich SIGN Letier Agents and Painters Protit Gold and Silver Sign Lett Stores and Office Windows Anyt put on. Big demand Free samplk M tallic Letter Co., 431D N. Clark 8t.. « cago. HUSTLERS make big money sellin ented Spring Maid Five House Bf: Outlasts 6 corn brooms. New ex features makes it big seller. Ewery w wants one Write today, Sample $ Sterling Producis Co., 35A 8. Desp! Chicago. AGENTS ties in Silent means $.0) per month ! : If you can sell our sp quantities, you should write for Salesman Catalogue It is the cret to your success, Write today free. Joseph Hagn Co., Wholesa Manufacturing Jewelers, Dept. PM, W. Madison St., Chicago, Lil AGENTS Jobbers, Catchiest N Invented. Aerial Balloon makes young wild with joy. Immensely interesting son's sensational seller. Large profit competition. Write immediately. M & Company, Tribune Bildg., New Yo ‘LITTLE Wonder’ Crown Capping chines sell to every housewife: equal i fyiency to expensive power mach nes I sellers. 100% profit. Agents, Dealers w Mincke, Alhambra, Calif. SELL World's Greatest Auto wonderful Mystic-cleaner blurred windshields; one application | glass clear 24 hours; fita vest pocket namental steel mounting; agents ama Vetter made $75 first day. Security M Co., Dept 279. Toledo, O AGENTS Something different! Eradium (Laminous) Crucifix actually st in the Dark Startling! Mysterious! derful enthusiasm follows every demonst tion 150% profit on every szale manufacturers. The Pioneer 1259 W. 63d St.. Chicago, Ill TAILORING Salesmen and hustlers wit out experience. to take orders for | wholesale tailors in factories, shops. All or spare time Wonderful opportu: to earn big money. No investment furnish everything. Don't wait, write day. State experience and present em! ment. Address Commercial Tailors, W. Jackson Boul., Chicago. AGENTS make a dollar an hour Mendets, a patent patch for instantly me" ing leaks in all utensils. Sample pa free. Collette Mfg. Co., Dept. 404-B, A sterdam, N. Y - START Profitable, Permanent, Indeper ent Manufacturing Business making goods you're selling. making 200-900% profit. I've been 23 years supplying ufacturer’s Guaranteed Formulas (C righted) Trade-Secrets, profits immense, mo experience or machi required Valuable information regard Crystal Washing Compound, ing Tablets. Laymore Eeg Producer, N Mo-Nol ‘‘Flu’’ Specific, Latest Food 5 cialties, Hygrade Disinfectants, Kor ! Guaranteed Puncture Plugger trustworthy Automobile Specialties S stamp for these and many other big before buying formulas. Miller, Chen Tampa, Florida, _ INSYDE Tyres, mobile tires, double mileage and punctures and blowouts. Quickly app!' Cost little. Demand tremendous unlimited Details free. American A mobile Accessories Co., Dept. P, nati, O. os HUGH profits selling Nibeo Sanit Brushes, Auto Washers, Brown Beauty 4 justable Floor Mops. Dustless Dusters other specialties Big line. Fast s Write today. Silver-Chamberlin Comp: Department M, Clayton, New Jersey IDBAL Sideline. Business men buy sight. $1.00 seller, 400% profit. K. H 1957 Warren, Chicago. _ PATENTS—Book Free. free Opinion of patentable & Talbert, 4842 Talbert Bidg., dD. C. Invent prevents Send sket«! nature. Ta Wa Corporatio Investment sma Marvello Was (trial fre inner armor for Aut pre e Cineir ’ Profit

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POPULAR MECHANICS ADVERTISING SECTION 41 “ORTRAIT Agents: Send at once for F020 \Guteher of Picture Frames and ments. Save money on your frame as. Send us your portraits for en- nt and get the best work and serv- the country W. G. Hannan Co., \.5, 57 Kast 18th St., Chicago. ENTS: $60 a week taRing orders for ed Shoes for men, women and Must give satisfaction or replaced Brand new proposition. Write quick tory and samples. Thomas Shoe 62 North St Dayton, Ohbio. ENTS—Three Timely Products sell- » wildfire for Spring cleaning. Zip- leans rugs, carpets like magic. clothes without rubbing. Polish. Big profits. food flavors, etc. Wells, Chicago. Dry Bill Make $8 Will show you how with our Pure Fruit Drinks Wanted Small package—-just add wa- rv’a the chance of a _ lifetime territory. Write quick Amer- iuets Co., 2319 American Bidg., oO ts selling auto ownerTs, trouble Jubilee br 1 cleans 33 6 Furniture let — parations, 212 North on Bone rated Spark In- garages. Banishes Saves gas. Exclusive Mfg. Co., 83, Sta. C, Jubilee health- Lamp. for scientific, useful, il! lieving, Therapeutic 1 uly be used in every home. i by physicians. Surpasses sales a of yacuum cleaners, washing sh registers, etc Big returns. lamp is as commendable as in sick room or on battle etition. Exclusive agencies catalog, prices. Sterling Lamp Co., Department 17, Chicago, wireless umbrella. n be used by Lady or wella ever made without ys in place. Handles col- tcase. Not sold in storea Write quick for sample. 198 Dike St, Dayton, new Sell Your Own Goods. Ma- necessary xpert Chemists ad- Special attention to beginners. r Formula Catalog. Blake Mystic Washington, D. C. ’ : Soft Drinks—Make $10 to $50 t add cold water to our prepara- i you have most delicious drinks ver tasted. Ten kinds, Orangeade, Cherry, etc. Retails 30 big glasses Sc clear profit selling by the glasa. Games, Fairs, Picnics, Dances, etc. loney selling various sizes to families, stands. Send 10c for ten-glass ue and particulars postpaid. Mor- Company, 4403-11 Madison St., Chi- IG Frofits Selling New $3.50 Automatic “¢ Machine. Absolutely accurate, Fully ranteed, Quick sales. Ten daily easy. ompetition Pocket size. Business ple everywhere positive cus! omers. sands being sold. Tremendous de- i Here's high-grade money maker. sett Company, 1458-A, Hollywood Ave- Chicago LIGGEST Money-Maker in t 100 men and women rs for raincoats, aprons you $2.09 an hour for spare time. ‘Donough made $815.00 in one month. en $19.00 in three hours. Purviance "7.00 in seven days. $5,000 a year profit r eight average orders a day. No de- ring or collecting. Beautiful coat free. No experience or capital required. Write ick for information. Comer Manufactur- Co.. Dept. U-126, Dayton, Ohio. WONDERFUL Chance. Men’s Shirts and irnishings at wholesale rates or make ) daily aS agent starting real business. Goodell Go., Dept. 50, 5 Duratex Bldg, New York America. 1 quick to take raincapes and water- Thousands of orders waiting START in a permanent business of your own, selling guaranteed Hosiery and Un- cderwear direct from mills. No capital or experience needed; many representatives make $3,000 to $5,000 per year I eur district manager get others working for you Write for details to Malloch Knitting Mills, 1106 Grant St., Grand Rapids, _Mich. OUR Rain- Rubber- windshield sella quick—big profits—get $1.00 and try it. Good Will Alliangs, O. cleaner samples for Service Co., AGENTS — Send for sample ‘‘Fretnot’’—~ the washday wonder. Be convinced you can do a whirlwind business. You can clear at least $20 to $100 weekly, according to spare or whole time. You don’t have to talk; if she doesn’t buy at sight, leave sample, she will be looking for you long before you are able to make the rounds again. Sam- ples furnished free. Premiums for your customers. Exclusive territory guaranteed to agents who can produce. Credits given. lon’t call. P, M. Motter & Sons, 20 E. Jackson Blyd., Chicago. _ z BUILD a genuine Choraleon ~ phonograph and save over half. Fine profits building and selling. We furnish motors, tone arms and necessary parts. Send for our catalog and free blueprint offer. Choraleon Pho- nograph Co., 622 Monger Bldg., Elkhart, Ind. PHOTO — Sheet Tops, ~ Portraits, Pictures, Pennants, traits and Pictures Books, Novelties Yr illow Frames, Patriotic Por- Medallions, War Prompt shipments: sam- ples and catalogue free. 30 days credit. Jas. C. Bailey Co., Desk B-C Chicago, ILL. AGENTS, $40 a week selling guaranteed hosiery for men, women and children. Must wear 12 months or replaced free. Agents having wonderful success. Thomas Mig. Co., 2262 North St., Dayton, O PORTRAIT Agents: Our goods will make you big profits. Delivery guaranteed. Re tects credited Prompt shipments Send for latest catalogue and prices. Adam J. Kroll & Co., 602 Blue Island Ave., Chi- cago, Il. “GALLAGHER selling guaranteed made $336.00 one Collection Systems by all business men.” Sayers Mfgz., Sheffield, Chicago. AGENTS !-—A New One! Harper's Broom and Ten-Use Brush Set combined Saves broom expense: lightens housework; easy seller; first order returnable. Harper Brush Works, Dept. X, Fairtield, Towa ENERGETIC Men anywhere, city, town, village ot country, can add $10 daily to income. Ask Safety Hair Cutter Oo. Washington, D. C., today—how? AGENTS—Genuine Gold Leaf Window Sign Letters. Reputation builders 15 styles in 30 sizes. Other ready made sign specialties, Guarantee Sign Service Corp., 127 No, Dearborn St., Chicago. BIG money making imitation onyx, agate, tile more beautiful than uine costing about Ife square foot. ble-faced building brick cost about $15 thousand, sell for $75.00. Granite equaling natural stone, grindstones, razor hones and grinding wheels costing about 3% retail price. Experience unnecessary. Money-back guarantee. Write for full particulars. B. F. Spencer, Box 21%, Los Angeles, Calif. WOULD ¢ good durable paints, oil varnish 49c¢ gallon, interest You?’ write Dept. 2, Emmelmann Bros. Mfg. Indianapolis, Ind. 500 AGENTS wanted at chell’s Magic Marvel Washing Compound 300% profit, Enormous Kepeater. Washes Clothes spotiessly clean in ten to fifteen minutes. One thousand other uses in ev- ery home. Astounds and delights every woman. Nothing else like it. Nature's mightiest cleanser. Containg no lye, lime, acid or wax. Free samples furnished to boost sales. We positively guarantee the sale of every package Exclusive territory. Own Your Own Business. You cannot fail to e big money. Barber, Ohio, made $600 last month. Send for free sample and proof. Hurry! Hustle, grab this chance. LL. Mitchell & Co., Desk 300, 1312-1314 FE. 61st, Chicago AGENTS: Big Profits putting up Genu ine Gold Leaf Window Yetters: Script and 15 other aoa Chicago Agency Co., 848 Altgeld St., Chicago. _ - 7 AGENTS: $40 to $100 a week Free samples. Gold sign letters for stores and office windows. Anyone can do it. Liberal offer to general agents Metallic Letter o., 431K N. Clark, Chicago. AGENTS: Sell our accident and sick- ness policies in your spare time Pay $5.000 death, £25 weekly benefit. Premium $10 yearly Permanent income from re newals. WFasy seller, Liberal commissions. Insurance Co., _Dept. K-7, Newark, N SELLS Like Hot Cakes Big Profits. New Ironing wax, also starch. Perfumes clothes lasting violet. Working outfit 5c. Territory given Marshall Manufacturing, 919 Gates Avenue, Brooklyn, N. Y. big AGENTS— Your offer on money-making Co week used 2815 F'bre marbie, ~onee for Mit- chance! lee our page 1890, See our Horoco U. 8S. PLAYER Music Rolls are ally known and advertised; more thousand piano and pbhonvgraph handle them We want represent become our dealers where we regular dealer distribution. No nor invesiment required to and establish yourself in business. player piano owners are constant buyers | music rolls. 80% of all pianos sold : player pianos, Applications desired from honest and energetic people wishing a steady income, United States Music ey aes 2932 W. A, nation- than five dealers atives to have no experience earn big a | Lake St., Chicago, U. Tyres *“form-fit,”’ double mileage, prevent punctures. Guaranteed. Protected territory; prompt ship- ments. $100.00 weekly easily made. In- teresting booklet free, Pelletier Rubber Co., Box 322, Cincinnati, Ohio. $500 MONTHLY, selling Motor Vigor, wonderful new Chemical. Saves 53% gaso- line, eliminates carbon, reduces repairs; harmless, Autoists rejoicing. l0v-gat package, $1.00; guaraiteed. Exclusive agency Hurry! Perkins (C. Laboratory, Hastings, Nebr 500% PROFIT. Ink Tablets, in World. them. 25¢ Ink Co., GET LY NER * protectors, outs and installed. “tire blow- Quickly Inside Kvale's neerns Waiting for John Kvale Saving. Largest more juart, 1000% Used by Millions brings 1 Chicago Posted for Spring Good paid for butterflies, insects See Display Advertisement Page 72. $100.00 REWARD if you pick our less Door Lock, put on in ten seconds without nails or screws A beautifully polished lock, guaranteed at low price 25e coin, no stamps. Live agents wanted. Lock Company, 130 West Jefferson, Spring- field, Ohio AGENTS 68 rugs, $1 in 4 days. Write for clasive 1 prices Sinclair's Key Sell rich-looking each. Carter, Profits, $57. sample territory E. H. ton. " Maine. AGENTS wanted to Rurglar-provf dows any fur sample imported 36x Tenn., sold 115 You can do same, offer selling plan; ex- Sample rug, prepaid, Condon, Importer, Stoning- sell our paténted Window - locks. Lacks win- position Send twenty-five cents and details to Safe-tee Novelty Co., 76 St. Nicholas Place, New York City. AGENTS—Genuine Gold Leaf Window Sign Letters. Reputation builders, 1 styles in 30 sizes. Other ready made specialties. Guarantee Sign Service 1T N. Dearborn St., Chicago AGI NTS—You can tle of “*Mystol’’ Greatest Flavor’ at every cents, You make 30 cents. Guaranteed to equal any flavor made and every sale gets you another. Let us tell you how. Mystol Co., Glens Falls, N. Y AGENTS sell Laundry your own name and brand and circulars furnished with Particulars free, sample Write today. Krebs A Point, N.Y. $60.00 WHEKLY. Guaranteed only Safety Razor on the market you cannot cut your- self Big demand Wonderful seller for $1.90. Standard Safety Kazor Corp., Pitte- burgh, Pa AGENTS—Sell _ tires. Guaranteed sign Corp., sell a 10 Vanilla, ‘ounce ‘bot- “America 8 house, at 50 Tablets under Free samples every order fifteen cents Products, College Newsom Valves for auto not to leak: also Snap Lox Dust Caps-—they just snap on Big- gest money maker out. 2 car owner waiting and buys on sight. Twenty- five dollars daily. Write lay for ter- ritory R ’. Sales Company, 3847 W Madison Street, Chicago. A HOT One—Shoe Polish i in like tooth paste Everybody buys. Profit Large Sample free. King pany. Dept. B Rockford, LIBERTY—Blue Ink Powder causing sensation among agents everywhere Pint package retails at SSe and saves your cus- tomer 40c. Enthusiastic agents are clear- ing $10.00 to $20.00 daily. Customers de- lighted. Experience unnecessary Carry day's supply in pockets Wonderful side line Agents are enlarging territory. At- tractive proposition and sample free. (Curiosity seekers keep away!) Address— Norman Ovri, Hemet, California = AGENTS —A Real Opportunity 10 to 200% profit on every sale Kar-Bon-Fx” real auto fuel, a staple article, send proofs, Today American Sales Co 401, Haverhill, Mass. 7 : FREE— Latest = issue New formulas Tella how to make your own goods. Write today. S. & H. Manufacturing Labora tories, 34602 Boylston Building, Chicago. » tubes Big Com-

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POPULAR MECHANICS ADVERTISING SECTION Opportunity! ed merit im tation profitable line gently present wer demand to the Handsome returt ained for the mall necessary to u tell secure i KASY Sellers nakers, bon ucts, Soft Drink Preparati Al repeaters, gre 0 h Agents wanted ufacture Production ¢ 1 nton chi GET our ming Catalog big nm maker monogram Autos etc. method and particulars free Motorists Accessories Co Manstield Ohio AGENTS —Get Next: Operate Re Rusiness by No-Commission Plan Unnecessary Particulars Free mission Agency, Lima, Ohio AGENTS, get busy Wi maker, Ideal Steak Tenderer home Makes tough steak tender as terhouse 90,000 sold last year Samp! free to agent yler Mfg. Co Dept. DI Mune Ind WH start you in a home wil bring you money every enee unnecessary Spare vassing Everything fur proofs Metal Craft Montague St Brook! SPIRIT hydrometers liquids 1 to 200 Agents, commissior Pittsburgh Pa SASCHA Cocoanut Oil every home and always repea make 100% } 31.00 for it containing eight 25e packages informatior United Pure Franklin St New York $15.00 DAILY Selling Amber able Combs Kind you ean bit mer Sample 25¢ Stover AGENTS $10 to $15 wher wants his gold in door of automobile; applied Your profit $1.38 on a sell him a set that own monograr Write samples, also for ul fer Monogram Supply ¢ Newark, N. J A. EB. F. VETERANS to article for every home Davison & Ulic, 98 Part FREE—- Absolutely vossers We will co higgest ployment NEW Tables Brandt transfer busines Sham por Free nect you t a the paying propositions Age ; Em Register €o Coving Winding Chalk Agents sample Trenton N J CARBON $1.00 Swover Pool Ralph Hanger only 50« Formula complete guaranteed Lt A Columbus, Ohio HOW Much Gasoline can you sell at 2e per gallon? World tests for Four yeara to prove it Secure exclusive right for your county ““Carbonvoid,”” Box “Tl,’’ Bradley Reach, N. J AUTOMATIC Sleeve Links Culfs over elbows instantly without unbuttoning; low ered they close automatically Sells like wildfire. Great convenience and shirt saver Mnormous demand everywhere Liberal ex clusive proposition for experienced sales Master Jewelers, Sheboygan, Wis- Remover Satisfaction 1497 8S. 4th MEN and wome ear $5 to $15 daily ii your own eity Whole or part time Patented household necessity, Sells at ight Mail 10¢ today for sample and proposition Address Room 17 Fourth Ave New York ci \MLEN Wome ldret everyone finds it easy to sell nearly every call wonderful universal household and toilet cleanser Repeat me fast \ll or spare time bring t me you how to estab general ageney Vn 0 elling Fibro Write Aron St. Paul, Minn over 1,000 pitic with first I28 page 1920 son Swa 1205P Sell Automobile busine Co., Dave! Repeat SHINESTROP hon i trops Pp $1.50 Agent Com I Walter Shinestrop any, 230 East Oth LUMINOL k watches, chains ( rhe J irticu Dept t14, 744 and bluff formula until 4 5 ur Nothing but the tr teal ! actur E rmulas processes veryt rt ! new line dividual rhe of mer have lines A revelat t formula Stop sell made ¢Z ( is ree other Matching Sampte I lu make then yo mercial ! ret J e Ln Workm S$ ’ ream Miller KLVERYBODY read Mail Order B ents Guid Drop postal for ox 207, Geneva, N y make protit handling Monogram New Patriotic Pictures ! r Flags and Nov Signs re Write Hinton Star (ENTS Immediate! te w proof e fast selling a it ma 4 . ) and a busines I v1 c Auto Supply « WONDEREI Machin Seven lun apacity 3s for me lollar ‘ specialties money \ ontinental Davenport, Towa new jidea No deliv information Tilinoi heavy price Shipped Omaha AGENTS — Every Ford owner needs a m Spark Intensifler Does ark Plug ! way troubles and save tasy to sell tig profit Write for our No Money Down proposition Double Action Inten , iasha, Wis AGENTS—-Big profits. Gold Sign Letters. hasily applied and cheapest manu- factured free Interstate Sign, Dent. « Halsted St Chicago AGENTS Either sex, to sell Waterproof Aprons The biggest a1 hest aprons on the market. You make $5 to $15 per day No capital required BR. & G. Rubber Co 618 Penn Ave., Pittsburgh, Pa., Dept SUGAR Tablets Particulars stamp Demeo Miantonomi Court Providence R HIGH-GRADE SALESMEN WANTED SIDE Line Salesmer anted—Experi enced salesmen wanted to sell our Four Cnt Saws to dealers and jobbers of hard war plumbing supplies, electrical supplies ete Only a live wire and one who is ex perienced in this class of trade should ap- ply State territory you wish to operate Northport Mfe. €o Northport. Wasl SALESMEN Fake We'll ww you $100 a firs \ protit is flashii ell fast ) tomer ‘ ything to make ew ever ld, always fresh life Only battery Widely t week your zu advertised for y prepaid Keled mplete Serviceabl 0 North WANTED now illing on Department Store “urace Michigan Sideline sal Hardware, poration il SALESMAN trade Carry accessorics as side large commi ' territory ° «& Boston 11 Mass SALESMAN ‘ earry Louse-Cha guarant terminator for cattle bx tunity Graylawn Farms In Vermont LOCAL Representatives everyy Ing positions, No soliciting quired Write Karam I th Oklahoma City Okla MEN, b pr to merchants Stephen Abel, Jr Chicago SALESMEN Whol un demand our ball , Unique l fre« Cry Self-Serving ‘ Machir oni or $1 ’ qualification teplic The Trigg A way Chic $5,000. PER year i easily made handling our fast vertising Novel Write for tating age perience and Arkay Manufac ng Comy Prairie Avy Chica Illinois SALESMEN Wanted for the Phonograph income ’ hustlers Eexelu row be igned Midwest " ‘o., Dept. I Ww Le St SALESMBEN yearly l sharing ecounts carried ter experience and record Paint Co tox 8 SALPSMEN—$10-$1 transfer letters for a garages te. Send 1 your initial general agency fer Supply Co Bowers New Jersey START House to Houve and be« Agent Dept. H tox 527, Stanley SALESMEN ma selling we hg z big for you—partk if stocks bonds cumm territory 1 given Buildir what instran No prospectus to buy strictions where If you are i $300 weekly, write quick Chapmat 400, 2961 Michigan Ave hicago SALESMEN selling our new folding swatters Commission paid son-Hurd Co Wausau, Wis SALESMEN Agenis—Crew Mar tepresent Manufacturers Sell tamdis $1.00 tb «heaper— Quicker than atring No free l ( selling ontfit $2.00 Refunded 25 «Ibs Commission—Salary R Rubber Company, Inc., 8 Van Wager Newark, N. J SALESMEN whe ¢ pocket New side line Cole Publicity Service Tnd SALESMEN: Immediately write fo f the fastest selling i1tomobi I m the market Sure success Bi ar a husines of y r wy ‘ Ant i y ¢ ‘ 4 Dba sells Increase sam 8 after

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POPULAR MECHANICS ADVERTISING SECTION 43 VULCANIZING auto-tires growing, profit- sble business, especially now. . Kasy to earn,’ instruction book $1. Plants $50 Catalogue tree. equipment Co., 175 inal St.. Cimeinnati, Ohio, 7 . CHAIN-O’-SPAKK, the Superplug. Ab- tely new principle. Functions where rs fail. Openings for driver ‘salesmen sideline men. Chain-O "Spark, 336 -orthwestern Bidg., Minneapolis, Minn. — S\LESMEN — $100 to $200 per wees y gelling $3.00 specialty, costs you 835 One man seld thirty in one day. territories allotted, employ your own ts Men with automobiles make big ey Grafton Mfg. Co., Grafton, Masa. sISTRICT Sales Managers, Organizing, ting and Managing salesmen, wanted ew auto accessory Only article of kind Big hit. Rig profits for right . All expenses to our office paid if we ect Write for full particulars. Na- Sales Co., C-605 Gas Bidg.. Toledo, in every state in union and all over Canada and 1 to handle the new “Two Trig- inimal trap as a side line on com- t They sell themselves after once Persons not handling other \LESMEN Wanted tried it having knowledge of their faults i but not absolutely necessary. w. A. Gibbs & Son, 2616 W. 4th (Chester Pa — \ “MEN can make $5 a day selling Pencils, Blotters, liberal terms: local and Model Calendar r Calendars Fans, i Fly Swatters; year: fine sidelines; g agencies. Write South Bend, Ind. _ - SIVE ate Managers W anted. by ed coneern. 20,000 made yearly. r t time. Appointing Salesmen to Self-Collection System’’ to fegsional Men (from which ir Own Bad Debts) Re- Your Profit $4.00. Commis- Weekly. Instant Re-orders. Ter- fast. Sample Outfit Free. Fed- n Association, Hartford, Conn, SMEN—Capable of earning $500 2elling ofl] leases. Write for par- Box %6. Henrietta, Texas. SMEN Light Portable Window tor: easily earried; quickly demon- every office and residence a pros- for several; exclusive territory. ler Ventilator Co., Box 128, Eureka, Wanted—We want devote whole of on substantial; dignified, high- proposition. Every steam plant a t Fvery order means a repeat. Ad- Dept. H, 1750 Monadnock BIk., REPRESENTATIVE ssive man to © Sell Sideline of Merit to Gara i Dealer Trade. Commission 20 om 614, 358 W. Madison St., Chicago. SALESMEN—To represent us in sale of * in company manufacturing new in- m of wonderful merit. Particulars Graham & Co., 66 Broadway, N. WANTED— Men with Ford cars and sales to travel over State. Salary and enses to men who can deliver the “is. Write—Gardner Auto Products, 23- W_ Haneock Ave., Detroit, Mich. 7" S\LVPSMEN—City or traveling. Expe- rience unnecessary Send for list of lines anc full particelars. Prepare in spare time to earn the big salaries—$2,500 to 0.900 a year. Employment services ren- reds members. National Salesmen’s ae Association. Dept. 125-G, Cht- ny SALESMEN Become independent—own your business, experience unnecessa a velling our $6,000 Accident, Death, $30.00 Accident, $25.00 Sick Weekly Benefits. $10.50 yearly, half amounts, $5.50. Guar- anteed steady ineome from renewals. $25°,- 000 deposited Insurance Department. Reg- istration Dept. P, Newark J. SALESMEN: Sell Spark Heads. auto invention, Quick seller five minutes, Fully guaranteed. $1. Liberal commission, Vest pocket size. American Spark Head Co., 107 N. Wells, Chicago, EXPERIENCED Specialty Our Producta used by the Government. Full Protection on territory with opportunity for promotion to State Manager. Our Salesmen making from $500.00 to $1,000.00 monthly. Write com- plete details pertaining to past experience and furnish references. Replies treated confidential. North American Fibre Prod- ucts Company, Cleveland, Ohio. Salesmen: United States WERE You Ever Offered a Grocery Store? You can handle Sugar, Flour, Canned Goods, Dried Fruit, Coffee and entire Line of Groceries, as well as Paints, Rooting, Aluminum Ware and Automobile Oils, with no rent to pay; no money in- vested; take large orders from samples. Goods are guaranteed and proven quality. Selling experience not necessary. Steady, protitable work for ‘“‘workers.”’ Address Hitcheock-Hill Co.. Dept, 200. Chicago, Til. Reference: any Bank or Express Co. SALESMEN Wanted—Gum, Peanut Vend- ing Machine combinations collect $2.50 to $8.00 commissions each sale. $10.00 to $20.00 daily easy. Commissions on re- fills, ‘“‘Sanichu,”” 3624 Cottage Grove, Chi- cago. COMPETENT Salesman can establish himself permanently selling a line of na- tionally advertised equipment for stores and factories, Only capable, honest men of responsibility will be accepted. Dept. C., Davenport Manufacturing Co., Davenport, lowa. $40 TO Gold Sign dows, Big eral agents. N. Clark $100 a week Free Samples. Letters anyone can put on win demand Liberal offer to gen- Metallic Letter Co., 431C. Chicago *ALIFORNIA like hot Absolutely Rosebeads selling odin Agents coining money new Big profits. Catalog free. Bead Company, SP2819 West Angeles, ABSOL Vv TE | Necessity. Costs 25c¢ $1.00 Many buy hundreds. peater, No competition. money. 202 deiphia a BULL-DOG Pico, Los J se lis Large re- Salesmen coining Pennsylvania Bidg., Phila- Inner Tires double tire mile- e Greatest seller and repeat order getter Fliminates Blow-outs and 95% of Punctures. Salesmen making $5,000 to $10,000 a _ year. Exclusive territory Write for particulars Eastern Auto Spe- cialty Co., Dept. A, Utica, N. ¥ SALESMEN Wanted to sell Electric Cigar Lighters and Moisteners. Salary or commission. You carry stock or we ship direct, Write for special offer. Drake Mfg. Co., 221 Grand, _ Milwaukee, Wise DISTRICT Managers « can make five. to ten thousand a year, selling our $100.00 outfits to farmers and dealers. Entire out- fit costs $45.50, ineluding ten double face 85e records, 14 other models from $21.00 to $67.00 Send references and full par- ticulars, Great Eastern Manufacturers Co., 316 South _Wabash Ave., . Chicago, Ti. FASTEST | Selling Advertising Specialty Made. Your customers—why not sell them Best. side line yet. Look us up, then write C. E. Erickson Co., Inc, 202 Erickson Bldg., Des Moines, Towa. HELP WANTED BE a Finger-Print Expert; $25 to $50 a week and more in this new and fascinating profession Finger-Print Experts hold posi- tions of independence and trust. Work in- tensety interesting They are in big de- mand by banks, corporations, big factories, detective agencies, etc. You can qualify. Write today for spectal limited offer and free illustrated book. Tells all about Fin- ger Prints University of Applied Srience. Room A-184, 1920 Sunnyside Ave., Chi- cago, Tm BE a Mirror | Expert. ~ Good income; spare time home at first: no capital; we train. start you making and silvering mirrors: French method. Free prospectus. W. P. Derr. Pres., 579 Decatur St.. Brooklyn, RB GET a Government Position Through Us. Position or money-back guaranty. Thousands of men and women, 18 to 60, needed in Washington and elsewhere for the years of “reconstruction’’ ahead. We'll coach you quickly by mail for civil service examination and appointment. free book RT2026 gives list Write for it. D.C Our of positions. Earl Hopkins, Washington, YOUNG Man: There is an uneommon opportunity awaiting you if you are will- ing to start at the bottom in a manufactur- ing plant and gain practical knowledge of the business to train for higher positions. A natural mechanical tendency is essen- tial. State, age. education and _ experi- ence. Iu. ., Room 925, 78 FE. Madison St.. Chicago.” FIREMEN, ” Brakemen, $140-$200, Colored Porters everywhere. Expertence Ry. Bureau, East St Baggacemen, by Railroads unnecessary 810 Louis, Til Mission 7 DOLLARS Saved All correspondence courses bought. } Write today. Pisgah, Alabama ae PHOTOPLAYS in demand Make extra money. We show you how Details free. Kex Publishers, Box» 175, H-51, Chicago. LOCOMOTIVE Firemen 1,000 for all railroads — $150-$200 monthly, experience unnecessary, permanent positions; promo- thm to engineer $500 monthly. Men placed on railroads nearest their homes every- where in North America. Address Railway Association, Dept. C, Brooklyn, % RAILWAY Traffic Inspectors earn from $110 to per month and expenses. Travel if Unlimited advancement, No age limit. We train you. Positions furnished under guarantee Write for Booklet CM-46. Siandard Business Train- ing Institute, Buffalo, y MHN—Laarn Wireless at weeks. Attractive positions men (16 to 45) qualified as radio opera- tors, electricians, mechanics, inspectors and draftsmen Beginner operators now aver aging $225 per month: no previous expe- rience or wireless education necessary to er.ter. Opportunity to travel and see the world Oldest and largest radio school in America; established in 1914 We train you through our correspondence course of kinds sold. Lee of used (Courses Mountain, home in 10 now open for at our local schools to qualify for official license and help you secure position on land, sea and aerial mail Wireless out- fit furnished for home practice Free cat- alogue on request. National Radio Insti- tute, Dept. 252, 14th and U Sts, N. W., Washington DP. C GOVERNMENT Positions are Desirable Prepare for Railway Mail, Post Office, Rural Carrier, Customs-Internal Revenue, Departmental, Immigration and other branches through our expert, former Gov- ermment Examiner. Write for free booklet giving full information about these posi- tions and our Money-Back Guarantee Con- tract. Patterson (Civil Service School, Bor 4025, Rochester, N. Y¥ a PATENTS— Book Free Send sketch for free Opinion of patentable nature, Talbert & Talbert, 4843 Talbert Bidg, Washing- ton, D. C 4 is ae a” INSTRUCTORS for machine shop We solicit the correspondence of capable ma- chine shop instructors for partments. Must be the various de- experienced and pos- sess initiative State fully age, salary ex- pected and former places of employment. The Cineinnati Bickford Tool (Co., (Oak- ley) Cincinnati, Ohio INVENTORS desiring to should write for our book, “How to Get Your Petent,’’ tells our terms and meth- ods. Send sketch for our opinion of its patentable nature. Randolph & Co., t- ent Attorneys, 620 F, Washington, D. C GOVERNMENT Examinations, Most thor- ough preparation, $5: returned if not ap- pointed; particulars free. American Civil Service School, Washington, D. C MEN — Women Roys 18 needed for government positions; $100-$175 Few to trarel—Hotel allowance No ex- perience required Write Ozment, 101 St. Louis RAILWAY Mail Clerk Examination Soon. Start preparing now. Write today for free booklet. Patterson Civil Service School, 6025, Irving Place, Rochester, New secure I atents Girls, over sign letters proposition System, 1579 OUR genuine gold window are an excellent money-making for handy men Slann Sign Antoine, Detroit, Mich WRITE Articles, stories, time for newspapers and news in spare magazines. Big pay. Copyright book Free, Press Syndi cate, 553, St. Louis, Mo MAKE money writing Phote-plays;: de tails free to beginners. No correspondence course, Producers’ League, 230 Wain wright, St. Louis. $95 T™ $150 month. U. 8S. Government Railway Mail Clerks wanted. Men, loys, women, girls, 16 or over, wanted, prepare now. Experience unnecessary. Common edu- cation sufficient. Pleasant work, Vacation with full pay Women get office positions. Permanent, life positions. List of posi- tions now open free. Write immediately. Franklin Institute, Dept. T-3, Hochester, = — GE? Posted for Spring. Good prices paid for butterflies, insects. See Sinclair's Ivieplay Advertisement Page 72 “RLUEPRINTS—tLearn to read them, ° See our ad. under Educationa',

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44 LEARN ted de en. Ea you fessio: help you Free Bor Promot Schoo! MEN $45.00 Frank! N. Y MARBLI Woou ¢ ( pr a colour i Mahler, W ART |! beautiful churches g instructions ticulars free M haven y { SS. GOVERNMI Men, boys over $95-$150 me l ‘ fheient exp ine mediately or Franklin Institut N. ¥ STOP Daily G rors, Auto headli free Clarence 3S Indiana. WANTED, men o Clerks $110-$150 free. Frankli Rochester, N. Y VULCANIZING itable busines fearn Instructior up Catalogue fre Canal St Cinch MEN—Boys, 1} Railway Mail ¢ $150 month I free Frankli: Rochester a. a HUNDREDS fraveling salesmet or ‘ kmployment Dept j ougl u system of training ily tor a 4 | $000 to $10,000 for free beok and list of ‘ Nationa Sa men's Training A ept. 1296, Chics Lilinois, SILVERING Paught Ka Plans sent fr Iexecelsioy MIEN month liu Write immediat Institute, Dept. 1 and Free ) imazing quickly qual sit int Send Sprin over TO MANUFACTURERS WANTED—Firm = t nanufactur meta} Perforating devi for " } H Diercks. Sioux Rapid Wa ATTENTION Ou tadio park Co. wants our new a6, 1919 Wisconsin DRUMMOND Lathe Blueprints lars Castin twent lolars UmakeM, UmakeM Buildings, New Plug ure Dec reliable o nufa isi at Dinger, Melvina, plugs on vy b Addi Ru e dol Ada York FOR ADVERTISERS TYPEWRITERS AND SUPPLIES R Chicage UNDERWOODS $15 to $4 ter t ¥ ( N UNDHRWOOD han manufac art ADDING MACHINES adding eTro pave Postpaid 353 Oompany MARVELOUS Machine Ret . ” Write Dept. DUPLICATORS AND DEVICES t Mak Remarkable use Circular 160-PM, N cators MAILING LISTS LICENSED Wa bh) hrwi Wash AUTOMOBILE thousand Super Minneapol LIVI Prices other list Name Supply ] Wiseonsit 1.000 1.000 NAMES ane buyer Reno Ni la PRINTING, ENGRAVING MULTIGRAPHING AND 1,000 COPUBLISHERS Wanted!! ple—Particulars— Registration $1 Syndicate Atlantic City SPECIAL!!! Tneh ment; 150 Magazines Syndicate, Atlantic 25 WORDS in 100 $1.50; inch display $5 ford Corporation, Pittsburgh ADVERTISE in 1.000 Corn telt Week- lies, $8.00 line > words, 28 metropolitan dailies, $15 Helpful Guide. free Union Advertising, 219 S. Dearborn, Chicag 25 WORDS in 50 me Charle Dynes, Winchester Sam- (lobe lisplay advertise- thrice, $10 lobe City Syndicate sists Maga free ines, Stan- nthlies COLLECTIONS DPBTS Credit Co., Va COLLECTIONS, Prompt % 726 Collected 818 Fast Anywhere Broad, Fidelity Riehmond Adjustments Ewer service where Credit Chicago efficient South BOND = letterh vr M quantitie $2.75 free on request Record inth ‘ Van Horne lowa PRINTING prepaid—1,000 not clopes, statements, ecards, $2 el Company 1/3 in Samples heads, « Samples Manchester GOoD Printing at low prices. 1,000 good letterhe s envelopes, cards, billheads, la bels ° »75 to $3.50 Samples free ‘atalogue booklets and = cirenilar pecialty Ernest L. Fantus Co »2 s Dearborn St Chicage LETTERHEADS $5.00 Pr. M. Orvi Hackensack, N. J QUALITY Letterheads, Fnvelopes . : Lowest Prices Samples Quality Print Shop. Martetta, Ohio LABELS Rubber Stamp samples Free kdward Harrison Baltimore PRINTING ve 1.001 Samples Ruled rms Free Pleasing Printing nutnt Pre nove ltie Sene Model Pres Water! MMED La } ibo BEST Lowe POPULAR MECHANICS ADVERTISING SECTION Shi HAMMERMILL Pe j $2 54 7 velop (or re ‘ nv t Con Price ’ Specialty ‘ HAMMERMILI atiractivel Race Printer ELEGANT Ag kh and \da m R AZORS AND BLADES SHARPENE! (Zor B GUNS, SPORTING GOODS NT B Be ehase t kit OATS (ons and sl } $4” Ma Nov cine higl Box MPORTED Pea $2.00: 44” elty Wis Se «6BRINGS §$ imitation 1 Tiffany Setting Spark 14, Boston 2 Maa DIAMONDS, WATCHES. JEWELR’

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POPULAR MECHANICS ADVERTISING SECTION FOR THE HOME

fAN*Your Wall Paper, it’s easy to do, s simple method, no experience ratus required Complete instruc- iollar James T. Herr, 2919 We North Ave., Balti- your own Shoes Save money Metal Adjustable Shoe Shining Y q t easy No bending —no Holds any size men or women’s $2.50 prepaid in tl is $3.00 Agents wanted. F. 8. Kay, Republic Bidg., Chicago.

ANTIQUES AND RELICS

Wholesale INE Ih M Highland dian Baskets jon Gillham, arrows and A. Ruby spears. Middle

AND MUSICAL INSTRUMENTS

Arranging, Composing— t International Copyrights r samples and low prices, ums & Ca, Dept. PP. In- ' World's Largest Pub- pated Walizes.”’ TS: Wonderful correspond- ready Information free. tuffalo, N. Y¥ ed to Rauer Oshkosh, | words of Sousa’s Band), lrombonists Send for Weak Lip High Tones. ol, Buffalo, New York "PI Mine a wonderful song step piano copies Pub., Hood River, t Se reat one Thornton ase Something for all te Jeffres, Michigan, and it New Jersey Song Arc : Agents Honolulu. Ikeleles naka guitars Ukulele Co., $ Big money and reputa r information J. Gordon 1 North Hoyne Ave., Chicago. and write music Lathrop’s Harmony, $ Learn in three Money returned if not satisfactory Musie Pub 6442 Union Ave., cn ago Ill ANS Deep, Mellow, Soulful on Easy terms for wonderful instru- tetails today. Gustav Henning, Miami, Florida Ff Automatic Calliope. page T I have old piano player. to make same $50 Cost Heald, 1414 Sixth Ave [POSE Get 547, April with $450. Moline, best 4040 have D110, you. song: ~ poems ? ~ | on Ray Hibbeler,. s Ave Chicago

PHONOGRAPHS AND RECORDS

Phonograph Parts at Lowest FOR Finest : Superior Phonoparts Com- write Frie, Pa ILI) your Phonograph ality spring and Arms Reproducers Big saving New catalog and build- g instructions mailed for ten cents In- tiana Phonograph Supply ( Indianapolis, ! ‘ANA BUILD Your Own g Pleasant tructions ree Write ‘e Dept. P **Perfection’’ electric Motors Wonderful re- Big sav- Complete absolutely Phonograph Phonograph instructive work blue-prints ete today Associated Cincinnati, Ohio PHONOGRAPH cabinets Everything your own machine All parts guar- Prices the lowest. Catalogs Free. Spec. Co Dept M. 108 West Chicago. Parts Motors. tone arnus necessary to build anteed Mi‘hwest Lake St RUILD Phonographs — Send two-cent stamm. for eatalogue of Reliable Dayton Motors, Tone Arms, Hardware, etc. Sam = Kremer, 118 West Court St., Dayton, BUILD Your own 50° Easy to build sary Catalogue and targain in unvarnished cabinets, complete rea ivy for motor Marvel Phonograph Co.. 2) So State St Chicago Phonograph Save No experience neces- Price List Free.

FROM Canton Tilinois, to Canton China, 100,000 joyal-for-life customers u-e our wonderful catalog and service to buy Talking Machines, records, albums, needles supplies, et The catalog and service is yours, too, free, just for the asking Write for this Sensational Money Saving look today—now! David Stern Company, Chi cago, Til TONE Arms, Motors, ete from and up Send for bargain list Benjamin Chimberoff, 120 So. State St., Chicago, Ill $5.00

PATENT ATTORNEYS

LACEY Patent HOWARD R ney I Ss Sense. See page 174 ECCLESTON, Patent At Formerly member Examining C : Patent Office Prompt and service Write for information Tr Bidg Washingtor DC PROTECT your rights Write for ord of Invention,’’ which contains f to establish evidence of concepti invention Prompt personal serv jiminary advice without charge J Kelly 832A Southern suilding ington dD. Cc INVENTIONS a ¢ Trade Registered Labels, Pri ’ Publi Oopyrighted; prompt service, reasonable fees plain advice request detailed information before placing your ousiness Jaynes & Jaynes, 800 hellogg Washington dD. C¢ PATENTS Fees in installments. Frank T. Fuller, formerly Lieutenant Engineers Washington, D. C DON’T Lose Your Rights to Patent Pro tection Before Disclosing Your Inver tion to Anyone Send for Blank Form “Evidence of Conception,’” to be Signed and Witnessed Form and Informatinm Concerning Patents Free Lancaster and Allwine, 221 Ouray suilding, Washingtor I Cc “Originators of the Form ‘Bwidence of Conception.’ *’ “INVENTORS Bulletir charge My free blank Record,”’ for disclosing fies procedure Personal liam H. Mulligan, Woodward Bidg PATENTS—The Expert of this firm is of great in properly protecting patent (Eat. 1897.) Thomas & (o., 902 ington, D. C PATENT What You Invent It valuable Write me No until patent is allowed “Inventor's Guide’ free Hough, 522 Loar Trust ington, D>. € MONROB ington, D . and Electrical work and vice free PATENTS Prompt personal service by an attorney-at-law skilled in all branches of Patent Practice Over 12 years’ actual experience: full information upon request B. P. Fishburne, 331 Me Gill Bldg Washington dD. Cc KEEP Up with Progress Promete Your Patenta. Send 50c for Year's Subscription to Best Inventor’s Magazine ‘Inventions and Manufacturing.’ American Industries Ine.. Washington, D. C PATENT applications filed or payment plan Trade-marks etc Milo |} Stevens & Co Washingtor } Monadnock Estab. 1864 PATENTS and Prompt service on patents Swift & > &. 2276-R Woolworth Bldg.. New York, PATENTS rrademart Write for our ee illustrated guide book and Evidence of Cx ption Blank Send model or sketch and description and we wil! give our opinion of its patentable nature free Highest ref erences. Prompt attention Reasonable terms Victor J & Co., 166 Ninth Washingtor Db. ¢ PATENTS ences B soo cd.selosing Richard B. Owen nee Highest ref- st r vumptness assured model ¢ preliminary examination at Ee. Coleman, Patent Lawyer, 624 F § Washington, D. C INVENTORS Advis nt free on quest. William C€ ant 18 | N Ww Washington, | ; so4 sity Street, Montreal, F Send re- Street, Univer-

FOR INVENTORS

INVENTORS ite , for advice and estimate for you nodels, tools and patents v onfider Brook lyn Experimental and Tool , 462 Ridge wood Ave Brooklyr N PATENTS Procured, Trade Marks regis tered A comprehensitc, experienced prompt service for the protecti nd develop ment f your 1 Preliminary rdvice gladly furnished ¥y u herg Booklet of informati t f dis idea free on re > j rd ) 20 Owen tld Va ' ° 297 free Striet] sldg 8 R Weolworth INVENTORS know every tey aken in osecuting eir applica 13 Booklet quest War Cubberley { ion tidg., hingten, D. C PATENTS tains book valuable j wm 1 w Con nver tors y invention for Fres entable nature Prompt years’ ex Tal $280 Talbert Wash- perience.) Bldg PATENTS—Send for free book Co tains valuable nformation for inventors 1 sketch of your it Free Opinion of its patentable Prompt service (Twenty years’ exper'ence Tal bert & Talbert, 4622 Talbert Bidg.. Wash ington D.«¢ PATHNTS if you have an Which you wish to patent you fully and freely to Munn & Co vice in regard to best way vf ing protection Please send sket model of your invention and deacription of the device, explaining its operation All communications are strictly confidential Our yast practice, extending over a period of seventy year many cases to aclvise to patentability with eut any expense to the client Our Hand Rook on Patents is nt free or This explains methods regard to Patents, Trade Patents, te Scientif tains Patent Office vention for nature invention the hes or enables us i in regard our terms Marks, Foreign American’ con Notes 1) ions of in t to inventors, and particulars of re- ‘ntly patented inventions Mun & Co Solicitors of Patents , lworth Build 625 F ee Washington Tower Bidg Chicago, Ti 82 Market Street, San Fran m0 MECHANICAL etual Motions in my book, Sth Edition sell patents and 50 and ex Inventor’a Universal Tells how to pro Government and Covers the matter from A to ntly bound Contains decisions of I s Supreme and Courts on Patent c Mechanical Movements greatly inventors —sug- gest new ideas that might prove of great xid in perfecting inventions Tella how to select an Attorney Has valuable informa- tion regarding Patent Sharks Selling Agents and Promoters Price $2 Postage free everywhere Fred G Dieterich 621 Ouray Building, Washingtor dD. Cc PATENTS Write for free illustrated guide book Send m or sketch and de acription for free opinion of its patentable nature Highest references Prompt atten tiem Reasonable terms Victor J. Evang & Co 157 Ninth. Washington, D. C Movements illustrated State 13e< assist del

Page 206

POPULAR MECHANICS ADVERTISING SECTION inventic Something driver that orking Phi vice gtor ( ATTENTION Spex Meta Work M Stamping Inve Ideas develope Jig, Fixtu Dies, Spec ot Sheet drawing Our long servic A connha & Met DRUMMOND Lat irs ( t UmakeM at a lt makeM

PATENTS

PATENT Wire 4 ! i chanica experie of whict ve V ' ! vt rea ' oug ALEXANDER ¢ RRIF and proper fcdre OUTRIK M ON ON n AUTOMA from <« ly time-sSaver ! t r S , FOR 2 Pat t i ve Should be provide wit! i I - Seed Harvester, Price two hundred No hammer evessa Oo remo ng Gu Woodson J. Hatheway, Stanber in the u ho Vr i eaply tured ish oy To y FOR K ; trations and Road, North Arling a pany ihe ‘samue : WRITH Tic! In and amuse ‘ i ' t i gt I \ llustrated Autom j tta t ver ,opul ani July Is] Nx LL. 706-1 x \ ru aT att tiv Reasor Gears Kraemer, 18 Mine (€ ble P Washer dress all ent Law ingtor 1) AL TOMATIC DENTAL plemer at | , 1.22 | Trap ble for tri 585 A very practic . ar j ) ( ‘ gates are with immediate a ‘ rate thi Ix kiver i 6 t- jiv selle ti lt Walker Falwards Ir te . ) Will sell y oO F Austir Texa Jeftri 61

rRIGHTI Stigate Emerson SS FIVH new patents Tal PATENT ad Bes igsgen le frames Machine, two Water-Mixers at t at tor sale ) vay may " ! uijusted Remover ud a Watchmaker’s Unit , pose ed in Outright this month, $25,000 all. or + 5 4. proposit write me Laui ties. Write f ; IMPROVED automatic locking device for Adelaid St., Hartford, Conn hossian Box animal nothing better for farmers dohn PETERS Line Drying Lars Watkins, Colo Level-winding, ball-bearing PATENT Pen or Watch Cases Drver and casting reel, in 7 ture Patent applied f prepaid, $6.00. Peters Knox Indiana Partie i ‘ please write Ceo Frankenburg ! Auburr St ; E., Pittsburgh PATENT 4 Drinking Fountain “ nat granted! Impre achment for sal Ncldre Geo. Pratt PATENT ; — em Dogproof 0), Richmond, Va » be y St. Campell NITED STATES and Canada Pa = ‘aaa t Burial Bo or Vaulting . P om

irther particular é uractur Ale 4 N razier ! '

Page 207

MODELS AND MODEL SUPPLIES POPULAR MECHANICS ADVERTISING SECTION ENGINES, MOTORS AND DYNAMOS ELECTRICAL

ERNS ‘ Book of i844 rs n wi ng Free 1 stamping plete ek Send Work: roRS book iH as 165 Ge « s, ghest references N Wood eral Pattern patentable Talbert for 18 Write and ble for nth, Contract & S haigineering and lachine Manufacturing—-Spe- Send sketch nature, ble models specialties, brass gears ana of of ’ Ce 7 N Evie Term Was Co» e3 C inclinati, ur t can designing “lL and aio! also « & © irchase ars experience. 12365 vo New, MALE i r n Ave RS tio work. hop rf n ou Mech Chicago, Reu Experimental metal in of ing, ORS rtwed LAS r F. A Mo any all al pr 6 omune ul that mice Pr nics to « mat kinds designing, , Stampl Expert gs make escription for Kellerton, nade, efficient Christian, Metal ig., for inve atalogue Karloy free of Pr Vict hington, M ur jence Work. Terre I Desxgne to. Ohio alyze . and duction eliectrica cial e 1e ) Buclid »-to-the-1 will 21s. ice, $ 300k 1. 400 De Inventions Work rder; rial, el plati special Send information Company, models, free Iowa, Service Wellston Te Washing- your ig ineer- patents or | fill practice, v0 novelties, g. Dept. estimate. for albert ntors; and The Ave., illus- Con- rompt or J. Db. Cc. odels, Mod laute, da or Dept. in- detail work 1 and iandle Gent- Ave- ninute long ae- pages post- pu, 6 de any ctrical gen tools, draw- free. A, Send large Sta.,

MANUFACTURING

YANTED me KR of metal N WIRE CONTRACT _ y Mfg ago 1g F ty PUNCH Pi ne Jigs dels Us Metal ta Jefferson, facilities ifacturir Co., want Lyons S0Me lin f the 1. Co liana. Goods, Co., Dies. We American f ig } dies - The all or are ies and stampings. 1206 and Iowa. light ™ Machine exclusive manufacturing device, most 0. 524 machine, patented complet turing plants in Indiana. 3] Box kinds 0 N. Manufacturing Designed estock Engineering Co., Production ne « cago, very Hardware & Machine unk WwooD nventors, t.. 8. St., incinnati, Mfg. © and of the Press work, model vanted. achinery special Completely equipped latest type. So. Dies or Sheet Metal Stamp- Manufacture machine ideal ; Marshall Grand Avenue, also etal Works, or or ely A No, made to Wester: or Dept. B, it’s made of metal, write | us. our specialty 999 tool and die mak- machine wit reasonable prices guaranteed DIES, ld ! i Models E.., Models, Mfg Kansas Chicago. and Write W Grand Rapids, Wood Light Manufacturing and Stamping. md H. City Patterns Made for Gall, a 8rd Mo, C 0., 746 Mich. nd Meta Floor, Articles Manufacturing Kansas stampings, otherwise, equipped 263, special Logan Ma- Clinton Prompt de- 6154- work Tmntel Manu- Lyons, article ddress: Bed- order. n Ave., 1 ma- Built. Lyric Quan- St., work h new Qual- 56 N. Wealthy 1 Pat- GUARANTEED current motors sizes, all kinds, Tell us your lustrated catalog free Hyre 633-Ml, South Dearborn St., WANTED—small ¢ Fngines, Electric Motor high cash prices for good mn. West End. Pittsburgh, SMAL lL, Motors and AC $22.75 %-HP $ $u7.56 Battery direct All ll- Co., Alternating Reliable makes and only. needs. Electric Chicago, Steam ill pay John- oline and ete Ww material Pa. Generat $.50 Charging Sets Lighting and Moving Picture Are Gener ators—-Motors for all phases of current Prompt delivery—Wholesale prices Write for late catalogue Address Motor Sales Dep't. 15 West End, Pittsburgh, Penna MOTOKS, Electric, no delay, dtuy, % HP., 110-volt, 60-cycle, back guarantee, no strings, $23.50; induct on double-shaft extension, above rat- ings, $16.50, We buy motors; 25% with or der, balance C. O. D. General Distributing Co., Duluth, Minn OLD Auto and Cycle Engines able for Stationary purposes. must be governed We make the Circulars A. Hitehcock & Co., wood Ave.. Toledo, O., or Taft, MACHINERY, TOOLS AND SUPPLIES PiLDESTALS — lixl¥, steel « ideal for grin ov each, one of metal ( Silver Creek, NAME on g Name and two o exceed twelve letters, $1.2 Thre titials, Sve Abso lutely the beat : Pike North Atl boro, FOR Sale lasses feed senig, K MODEL rs 4-HP ‘a iP AC Charging, constant money 1 wn x very valu But th governors 803 Oak Calif

Several hundred lumn, 10” iron ny small machine s than present Postal Supply square t ders r r more, jlumbia _ narkil tuvl sieel slam & Acetylene light Mo mixing machine. Ephrata, Pa Shop Equipment 6” lathe hand-power shaper and planer, grinder drill presses—rough castings or tinished ma chines Send stamp for catalog. Huhn g. Co., 589 Elm St., Arlington J FOR Sale-—-One New power stationary Fairbanks-Morse gasoline engine, purchased for use during the fuel shortage, but never set up. Price $200.00 F. O. B. Chicago, subject to prior sale Knapp Bros. Mfg. Co., 2419-2425 W. 14th St.. Chicago, UL WELDING Plants for Small payment, balance six Apparatus guaranteed for Lermo Company, Cedar Kay rikhE Vuleanizer for 25% Equipment Co., cinnati, ¢ FIVE 6-horse Perfectly All to ten year. ids, lowa Purposes months one Write Save Cin shop use 13 Canal St., Pratt & Whitney chines, Each $75. Send ‘. I. Lucas & Son, Inc, Bridgeport, Conn. ROOF Leaks stopped quickly, permanently with our guaranteed roof paint and cement Keady for use, does not settle, thinning un necessary A square deal builds up faith and confidence, try us Martinek Paint Co., Dept. AC, 405 Lexington Avenue, New York City BLUEPRINTS—Learn to See our ad under Educational 1-3 SPINDLE drill press, 1-21” Heavy drill press Price, $110 1-Power hack saw Price, $2200.00; 1-24" Band saw Price, $110.00; 1-24" Wood planer Price, $200.00 Standard Machine foot Company, 172 W. Locust St., Colum bus, O LATHES, 100 new 3” $3.50 cash with order €o., Dayton, Ohio CONCRETE Building and Molds Catalogue South Second St., St. Louis, OLD Auto and Cycle FEngines valuable for Stationary purposes they must be governed We make the ernors Circulars EK Hitcheock & 803 Oakwood Ave., Toledo, O., or California AIR compressor with t tings. $54 Equipment Co., Cincinnati, Ohio, — FREADRIC H “Belti ng Mo., Manufacturer good rebuilt belting; stock; new belting, and interesting prices, esting Repairing old belts ~ Milling Ma- Ss read them. Price, $75.00: swing bench Smith-Gustin lathes Sales Machines Write 204 Mo Block free. very But gov- me. Taft tank, hose and fit- 171 Canal St., Louis, leather regular inter- Shoe- large waterproof values.

Schutte MAKE Dry Batteries Simple practical instructions, with blue print, 25 cents. Di- rigo Sales Company, Lath, Maine WHOL. SAL& Price M and elec trical supplies inciuding sockets, tape, ro scttes, switches, wire, con cuit, cleats loom, porcelain gvo Illustrated « ilog free hiyre Electric Co., 635-FH, South Dearborn St., Chicago. STORAGE plete new repair Ldison, . tors is ied \ m maintenance the Ss. I Batteries Simpli treatise on action use Describes fully Gould, Willard ie other forms Only complete and d book subject 320) «pag illustrated $2.00 postpaid Pop chanics Book Dept., 6 N. Michigan Chicago. BLUE me R INTS } A te on Electrical Single, Cycle 1 { Voltage changing Connections Controllers, Compensators, and external connect covering 0 Armature Start Generat and complete rewindal .» Connecti ‘ hari Chittenden, thews Avenue, Kansas two Cc 0 Trat sform r . a f Mot gd ns Tu with A “ ‘ ita Parti Dept City, ples u M Mis free Mat 8 i uri HOW to m trical ake rage lWattery Small Hydroelectr her electrical described SI st Generator idre ilar Ave ressor MOTOR s with air « Equipment incinnati, Ohio TRICIANS ame and address erature of our Modern Method of Electrical Practical Diagrams uvenir eard included Electrical Wiring Co., Box A. 173, Altoona, Pa KLE semi 1 Wir f emen, descriptive iue Print Wiring r 5

FOR THE SHOP

HOW to and 00 « er tained in Shep pages Pri 0 ce Mechanics Lb ook Dept Chicago HOME-MADE 1 and Emery articles Four postpaid 6 N construct small b valuable ar‘i Notes, Volume ive. ts, postpaid r 6 N. Michiga: fur are < rass t) es r B28 ilar Ave Turning L other valu Fhop Notes Price 0 ago book and and Grinder and ained in pages Popular Mechar Michigan Ave,, Chi PATTERN Makers! A the principle f pattern and moulding. Written by G a practical pattern maker of ence 1m book treats the much more simple direct manner than most 24 pages, 512 postpaid Popular 6 N. Michigan Ave HOW to construct end 500 other valuable tained in Shop Notes pages "rice 50 cents Mechani Book Dept., Ave., Chicago MENSI ge pe ers This 128-page problems the skylight maker 115 illus. Cloth Price ular Mechanics Book gan Ave Chicago 626 KASY W everyday use for ter, mechanie and everyone who as an occupation or for recreatio found in Shop Notes, Vol. I ? 517 Tilustrations, Price 50 lar Mechanics Book Dept Ave Chicago saw, 500 the, ble Vol cents Dept., ume Book to ng ard peri in a effective thi: Ine Price $1, Book Dept., oted core mah H. WH years’ ¢ subje et and ix along illustrations Me Chicago, de 0 \ oks hanics small brass furt articles Volume 1 postpaid 6 N ace ire con “ive 228 Popular « Michigan for Sheet book gives tinsmith, and metal $1 postpaix Dept.. 6 N Meta!) Work- practical r cornice and rid slate Hard older T avs to lo the ho ise! cents 6 ¥

BLACKSMITHS

WELDING Plant or Small payment, balance Apparatus guaranteed for termo Company, Cedar Rapids MAKE More Money Vasy Forging and Toy’s modern met Hardening, and T with colored f all I to ten year lowa urposes months Write six doing hard jobs solid welding with f Blacksmithing z to a standard Charts, all for one W M Toy Sid hoxis my Temperi free werir ra

repair leather, forty cents pound wanted Agents dollar Sample ney, Ohio

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POPULAR MECHANICS ADVERTISING SECTION FOR MECHANICS SALE OR EXCHANGE rkiec t M needle mail > Ca h ans SPIKE strength « tilled liquid WC"H 1S Far LAW Knightstowr ADDRESSOGRAPHS Vultigrap ele ‘ou bu M SHAWNES of 1 Bt vrices vor! "ay or insatistact Sell pt Secor pare time Mail-Order Ruffalo, N PRE-USkD I uprlies I rains, Richland AUTO-Tire Wompressors ry pri shoes I AUTOMATIC ¢ tition a bare “Mitchell, So. Dab few UNIVERSAL Knitting Maet j it tyles, hand power For Ca i L 1 may pre tress Daniel. Bucker Peabody itzler sold $4) W——1 MECHANICAL v20,06 end = right ow ‘nstrumept WESTER N Manga ! {10 volts vrice Te Altor Ii ror Write « ame a xO pp that’s grove Actual Photé DO Ta markets ma isture variely house owner watered a tir lt-rmwom shacte ng at $5 terms Catalog Strout Farm New York bushels rag for tel ber iful 00 Details Bargail Ager potatoes t& years yportionately a No i lands $25 to $100 Writ Commissioner 4 ave wud i Own your Fruitland lorida Facts beautiful income ! ! i grove here He you reaped a chance acre offered Result— he You have art now the same Write grapl t I Small n The the be Wri DOGS, BIRDS, POULTRY, AIREDAI rs brood matror il | to ! 1 W DOL! BELGIAN HARES, GUINEA PIGS E ‘rank ¥Y RAISI Rab! e | j pound ] Ou Magazine Rat € 0 Rabbit lub t Sts.. K ier Fur Food * a pound Profits Quickly Mad ty ock and show ) to market the meat and fu Cr Common Sense Rabbit Ra ket Agreement l0e 64 Magazine it N ticulars door Enterprise Missourt RAISE Flemish $8.00 1 fi a stock tru pure! hipping Dept Additional Classified Ads Page 50

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POPULAR MECHANICS ADVERTISING SECTION Send Coupon for FREE Lesson val Draftsmanship j VERY man ambitious for immediate success in Draftsmanship should take advantage of this unusual offer of complete, comprehen- sive lesson absolutely free. The only offer of its kind—the only way to be absolutely positive of choosing the right method of instruction before you enroll and invest your money. You send no money—you will not be obligated to enrol! now or later. Simply mail the coupon. Study the free lesson carefully. You will readily realize how easy it is for any man to quickly master Draftsmanship under our expert instruction. Prove before you invest a cent that you are fitted to study Draftsmanship and that ours is the most thorough, the most comprehen- sive, the most expert instruction of all. Send coupon at once. = \$60to$150aWeek Draftsmanship is one of the most wonderful professions today. The Draftsman is an independent, important, high-salaried man. He is constantly in demand. Increased salaries and big promotions are on every hand—$60 to $150 a week is not unusual for skilled Draftsmen. Today thousands of skilled Draftsmen are needed everywhere. The Help Wanted columns of every metropolitan newspaper are filled daily with appeals for Drafts- men. And theneedisincreasing with every new day. Minor positions are open even for beginners. As you advance in your studies you can expect immediate promotion. Billhons of dollars are to be spent in new buildings all over Ame’ .ca. The recon- struction period is ready to open in full blast. Construction has been delayed long enough—additional Draftsmen must be trained at once. Never were such oppor- tunities and large salaries offered Draftemen. If you are fitted for Draftsmanship, don’t worry about your future, “Personal Instruction by Mail"”’— earn ome in your own home, during your spare time! This is the Chicago “Tech” extraordinary system of training men for Draftsmanship. This is the wonder- ful method that gives you thorough and specific training in every detail—the method that qualifies you to step right into an important position and make good instantly. Training under the Chicago “Tech’”’ method gives you practically the same won- derful benefits as having our famous experts right at your side. Chicago ““Tech” graduates are first welcomed everywhere. Large employers realize they are Contractor expertly trained—fully capable—absolutely reliable. By our method you train under the supervision of greatest leaders in Draftsmanship—with the same personal efficiency as resident students. Theordinary method will no longer do. If you cannot come to Cnicago, the same exnerts who instruct our day and evening classes will teach you by mail. Either way our system qualifies you for success and a goodsalary. Fornearly 20 years Chicago “Tech” Engineers have been training men for these high salaried Drafting positions. - ine > r} 1 “Home- Drawing Outfit—No Extra Charge 5:\33°0 “i er Home plete—the very same high class instruments used by successful, practical Draftsmen. Other High-Salaried Positions If you are anxious to qualify for a profession other than Draftsmanship, the Chicago “Tech” experts will train you either at our college in Chicago or at home by mail. ” Cee et eer et eee _ oa a ar ee Architec- CHICAGO TECHNICAL COLLEGE tural and Building Professions are em- . pot a braced in our highly developed Home 630 Chicago “Tech” Bidg., Chicago, Ill. Study Courses. Check on the coupon Without obligation on my part, please send free and y« at rizht the profession you wish, if not paid, instructions on how I can become an expert in subject drafting, and we will send you free de- marked below: tails of our method of training and the | Draftsmanship

= as

] Plan Reading—Buildings lan Reading— Machinery stimating—Buildings irveving lumbing —Estimating:, « team Engineering [ largesalaries awaiting Chicago**Tech” Automobiles | graduates, | ] Gas Engines [ Aeroplanes | MAIL COUPON | Designing A big position and a big salary are { j Contracting— Buildings | calling you. You are needed asa Drafts- N man or in one of these other professions ane —< —now. So mail the coupon today. Address Designer Take thefirst step toward inde- pendence and larger salary. Post Office State Free Trial Lesson included when inquiry is for Draftsmanship or Plan Reading P P S } | ] Please Mention Popular Mechanics

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POPULAR MECHANICS ADVERTISING SECTION Continued from Page 48

PERSONAL MISCELLANEOUS | LOW prices on varnishe st

SNUFF babit How to relieve yourself quicix ind easily Book free Kdward we i 3 187 Sta. F, New York. Biit/TMER—Pteasant root, easily, inex pensively overcomes any tobacco habit ~ ad address. Franklin Stokes, Mohawk torid MAKE People 1 Like You: get along bet ter bee popular make more money velop a winning personalit human nature know peo Send 2-cent stamp for co Power,’ a little book that pei: way (Address, Progress League, 22 BSauare, New York City. TOBACCO Kills Manly Vigor. Quit habit easily Any ‘form cured or no char If cured $1 Stops craving harmite Full remedy on trial Perkins B Hastings, Nebr ST-STU-T-T-TERING cured ome nst tive , Kle tree, Walter MeDonn ll > Potomac Bank Build- ing, Washingt ‘ WHY b nly ha live My free book Man the aster lls you how to become a new wing ri mien Healt list tute 62% ne ‘ tldg incinnati, O eT AMMERING and Stuttering positively cured by « h tam 10 years Treatment ers Tu stitute Penna IF you without any results send : st man, 915 2lst § R ck Islar FREI Stop using tobac We v free information how conquer hab ily and permanently lts Guarant Anti-Tobace: League , 7¢ Omaha Nebr TOBACCHS or Snu ibit cured pay, $1.00 if cured Remed t Surerhba Co., TP. Baltin “TOBACCO Killed My Friend qu in time My method : oO request Box 694, Chicag polish removers Any quantit LOCKSMITHS How to unleck cylinder (onway, 27 East Milwaukee Ay all locks. 100 tricks of the trade | Mich = money back if dissatisfied. Routson, CIGARS Prima Linda, 1 Andover St., Oakland, Cal quality cigars. Prices suby KEY to Wood and Steel Shipbuilding trade solicited, Agents wanted for Carpenter Joiners Westman Help 34, Station J, New York ers and others -engaged in building ships PHYSICAL exereses for me Compact pocket sive 68 pages illus fully explained; send for free t ) @ents, postpaid Popular Me- to Keep Young.” T. E. Vaug chanics Book Dept., 6 N. Michigan Ave chants Laclede Bidg., St. Loui Chicago o— ae THE Safety Pocket Lock I GET posted for Spring. Goed prices paid | &ttiele for a Mail-Order busin« for butterflies, insects. See Sinclair's Dis “5 cents for sample. L. & ©. | play Advertisement Page 72 Columbus, Ohio CORNS—Why suffer Get rid of them HAND( UFPS. Legirons Key Guaranteed eorn remedy will positively take img. F _Widmayer, 601 We them off in or 6 applications No sore New_York ness All pain leaves first applicati GRANDFATHER'S Clock W in stamps. Eureka Drug Company, Topeka Build your own cases from our fre Kansas tions. Everybody wants a hall * er ean make gol protit building artist sialic ame eee. 8 for your friends. We replace instructions for $1.00, No stamps Alfre works in old clox ks wit wor Hogue 138 Gale Ave Pittsfield, Mass at money-cuving er ~ describing the most beeu YANKEE Williamson Poeket Knife Mar ‘| ever sold at $55.00 Clock ual TeHs how to make a solid body with } Ruffner St Philadelphia, P only side and one edge, and other wor cl gs that have never been exhibited process $1 Specimens igned by the King of ~ hittler atamt M. Day W ifa a pocket § kn ‘fe « silver - = ~~. sible in a Nutshell,”” 100 cor | PECANS Three poun . refunded if not satisfactory

PS anybody can make other remarkable pas : tantly. Price, 15« Gg. 3 Dallas, Tex Wall St., Los Angeles, | MOTORCYCLES Side c | Car tior M open any lock pin-tumbler }- | Repair The ot y_ comp.ete it key picks or tool Wor n this subject ie dealer pyrighted instructions } rhe find lis an Williams Box 100 rt =H MASTER Keys $1.00, Opens 200 ferent locks Master Key o., Manhatte Bldg Milwaukee, Wis USEFUL Data for *yors, mechanics and bey uts mailed ly Cahar ‘%) West 177th Starting new

= And the Agency G e t T y | ia In Your Territory 87 H. P. 117-inch Wheelbase 32x 4 Goodyear Tires Electric Light and Sitarte Boyce Motometer Borg & Be < ke Clutch Beveled Glass Rear Windows Full Floating Rear Axle Hotchkiss Drive, 18 inch SteeringW heel

BIRCH MOTOR CARS \ Previous Experience Not Necessary Gut Ghereugh ssuseees watungen Aate- Dept. 619, 81 E. Madison St., Chicago mobile Driving, Repairing and Setling. We heve trained handreds of others for succes* Please send free book and fall partica- lars as to Birch Super-Four and Agency. Write NOW for full specifications of New 1920 Model . Birch Agents Prosper | One of our Texas Agent gold two carloads of Bir Cars within 60 aaye after he received his frret demo strating car. Whether »« | =! out how you can get one of these superb cars for yourself and make money selling details of our great offer them toothers. A big opportunity is open to ambitious men who are wilting to train them. selves and then get out and hustle We pay big commissions for seHing Birch Cars. The World’s Greatest Motor Car Valu

own a car or not get

SEND THE COUPON NOW FOR FULL INFORMATION. in this way, and we believe this ts of the reasons for the splendid success Birch ._ 4 are enjoying. But the BIG REASON is the cars emndive ~«, 80 per cent of a!! 3irch Cars are in use by farmers and in #mall towns, and get the hardest kind of ee: vice. Mud, sand, rocks, hille and rough going have no terrors for these sturdy car: Send Coupon for BIG FREE BOOK and Full Information You willbe astonished at the liberality of our offer. Let-us pat ail the facts before you at or =< costs nothing to investigate, so tear off the couven right now. Sign It and mail it to us tedey Nememaninchs MOTOR CARS sakes, e. otene Member of Chicago Association of Commerce

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POPULAR MECHANICS ADVERTISING SECTION 7 | 1 ORRESPONDENCE tne buacness armor of tne average man cor wists of but one shield ; he masters but one sub ec tombine a mastery of every subject and! you have the complete shield of the succes ful executive FOREIGN TRADE pers Y G [MERCHANDISING i T How does a man get into business for himself? A man may be a first- class salesman, and re- main a salesman all his 1; P blue He may be a first- class accountant; or engineer; or superin- tendent; or depart- mental head and—in spite of all his ability and hard work—never rise beyond. How is it that so few men are able to jump over the departmental barriers and establish themselves’ in their own business? The career of J. H. Hansen, President of the J. H. Hansen Cadillac Company, of Omaha, inswers that question. From salesman to president “When I located in Nebraska as a salesman for the Cadillac automobile,” Mr. Hansen wrote recently to the \lexander Hamilton Institute, “a repre- entative of the Institute found me, and persuaded me that I might just as well try tor the big prizes in business as for one f the mediocre ones. The decision to ‘nrol in the Modern Business Course and Service was a turning point in my life. “I knew something about selling already. But now I began to see busi ness as a whole, and the relation of each department to it. Advertising and costs; accounting and office organization; the control of men and corporation finance all these elements, which are necessary if a man is to succeed in business for himself, came to me with the Insti tute’s help. “When the opportunity arrived I wa ready for it. We organized our com- pany and the first year did more than a million-dollar business. “In my judgment, the reason why so many men never get into business for themselves or fail after they do get in is because they are not prepared for their opportunity when it comes.” Trained and sure of step The man who masters the prin- ciples and acquaints himself with the practices of modern business acquires the vision and courage needed to take the big step— vision to and know voppor- tunity when it is presented, and courage to decide how to act. see To him the elements of success and causes of failure become axi- omatic. He has learned what to do, and what to avoid doing. Ignorance of the fundamentals which are the keystone of success- ful business practice is the cause of most business failures. You have asked vourself, “How can I get into business for my- self???’ Mr. Hansen and thou- sands of others have answered that question for you heir records speak, with the eloquence of accomplished success, this mes- Sage to you: “Train yourself; learn business Please Mention Popular Mechanics as a whole rather than the details of a single phase of it. Master the fundamental principles of all business so that you can with con- fidence meet opportunity when it comes to you. Che Alexander Hamilton Insti- tute is engaged in fitting men to be ready for their opportunities. lo the man who knows just one department, it gives the whole background of modern business. “Forging Ahead in Business’’ ‘wa SAVE your time the Insti- tute has answered every ques- tion that is likely to occur to you about the Modern Business Course and Service in a 116-page book, entitled “Forging Ahead in Busi- ness.” It is a book that should be in every ambitious man’s library —a veritable guide to business progress. And it is en- tirely without obligation; send for your copy today. ottered Alexander Hamilton Institute 649 Astor Place, New York City Send me “Fo Business” Business Position

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om) s|NESS 52 POPULAR MECHANICS ADVERTISING SECTION —And the DETROIT al The joa TOR dusty to gut tate Win . seven million autos, trucks and tractors already in operation, the demand for garages, service stations, auto electricians and competent auto mechanics is greater than ever before. Garages are filled; mechanics are working day and night. How will each year’s steady increase of hundreds of thousands of machines be cared for? Even if it were possible for the field to become overcrowded, it would never be overcrowded with com tent auto and tractor men and they’re the fellows who can get and hold ke ma Earn *100 to $400 Monthly Trained men are, and always will be, needed; they are the men who draw business to their : employer's erage Or service station and receive the big salaries. .B. S. graduates are in demand in Detroit and everywhere. Factories, garages and service stations are constantly asking for our men they know the value of the training we give and do not hesitate to give our graduates the preference. Your success in this business, as in every other business, depends upon your training. Really, there is no limit to your earning capacity after you have mastered this business. Graduates earn $100 to $400 monthly. To the man who wants to get into business for himself, the Auto and Tractor provide the opportunity to get into a well-paying business with the investment of comparatively little capital. On , graduates who are in business aré making $5,000 to $10,000 and more yearly. It is their training which makes this possibi: Auto Factories Endorse Our School The thoroughness of our methods and the completeness Money ~ Back Guarantee of our equipment are well known in the Auto Industry. The biggest factories in the country heartily endorse our Course. We guarantee to qualify you for @ position as chauffeur, repair In fact, many of the leading Auto Manufacturers assisted in outlining our Course and they give our Students the fullest co- man, demonstrator, auto electrician, gar- age man, automobile dealer or tractor me- Ho Spt erm These factories are constantly calling on chaniec and operator, paying from $100 to us for graduates |ecause they know the type of men we tarn $400 monthly, or refund your money. out. Everywhere in the Automobile Indastry, M.S. A.S. graduo- ates aregiven the preference because ours is the Factory Endorsed School . What We Teach—And How In ten to twelve weeks each student is thoroughly taught the common principles of auto, truck, tractor, stationary engine and farm lighting plant construction. Every part and ite operation is explained in detail. We train both the head Not a One- ° and hand. Our Course in Auto Electrics is most complete Man School because it gives a thorough training in Auto Mechanics from ‘ . J AtoZ Starting. lichting, ignition, carburetion, labrication, This peinat te founded Mo TOR Car Comrayny transmissions, differentials, chassis construction, etc., are 2”, ‘he Dest, newest Ocrrort Micw..U.S.A, taught thoroughly. Not one thing is omitted. As a part of ! rinciples in the Auto, our regular courses, students are given complete and thorough Truck and Tractor The Michigan State Acto School bears a very good training in the care, repair and operation of farm tractors. »4siness. Our Course | Teputation and we believe turns out good workmen. At 8 ie t time there seems to be difficulty for th This part of our course is constantly growing in importance. oe ee Sodesten to esenre sitions. Very uly youn, ™ 2 H - == co-operation from AIGE DETRO MOTO * Brazing and Welding and Tire Repairing Ms»fscturers, Ga- | WA: Whesier, waaay Clenaney are taught in separate courses. Either of these courses ions and Owners. It Burien MoToR GComPant may be taken separately and the field ineither line is large but §,7° poe man ~ 8 but the combined if taken with the regular automobile and tractor course, make {deas of the bigs s of the biggest Pocrn Peqnio am a valuable addition to the equipment,of the «tudent. Tothe and most successful man who wants to sell autos, tracks and tractors, M.8.A. 8, ™em im each > id. ques tra: gives him an exceptional advantage for he knows just how to judge A. G. ZELLER, the value of old machines offered in partial payment on new machines. He President Wish to that from all we heve been able to knows these machines a« no average salesman can know them. With practical learn, the State Auto School is bt. They methods endorsed by Auto Factories and a schoo! located in Detroit, the Heart of the Auto Industry, is it have quite a plant and a large number of students instantly receive from graduates such storics of success as printed on epposite page 7 from all over the country. ates acta daca . : = iis _ Of course, do not wish to construe this letter as in any wey guaranteeing em, yet we have never heard 4 had i anytht inst them we have heard a lot of good Start Any Time Free: Big176-Page | sremsis, bes eng bars beard ot ot eres Send’the coupon on op- |” ***"*“guicn motor company Our school is open the year "round. Catalog posite page today for (Detroit Branch) Enter the big 176-page catalog DETROIT classes any day and copy of latest **Auto School News.”’ ® ™ THE feeusTEY Y ap t They tel! about Courses—show more than u mo 1 e ou can ge a hundred pictures of equipment—give started the letters from big Auto Factories and stories same day you of success from graduates. Our Courses Gupp Motor Car Corporation arrive. Our are as reasonable in price as they are bd os od “ep P - a Oetrolt, Michigan. CSA Welfare de- age LS ae 7 — ean on ies . Ave ped a Train an ™ Having had recently visiti partment will petroit without writing for eatalog have most poet 2 yt | assist yOU 1M found our school and.courses so satisfactory that t Tmpreased with the personnel of yout finding a good fm ined to get the 2 ing. Our money- SSSA pen eee yee ede att per room and splen- beck, searastes pretest ee Te eto lee. ote CAR CORPORATION did meals. troit, The Heartof the Auto industry. Use _S. ©. Sotishars. Manager Service Departnett MICHIGAN STATE AuTO SCHOOL ‘The Detroit Auto Schoo/” “Endorsed by all Leading Manufacturers” 306 Auto Building Detroit, Mich., U.S.A. 6587-89-91 Woodward Ave.

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POPULAR MECHANICS ADVERTISING SECTION a. FACTORY ENDORSED TRAINING The man who wants to learn the Auto, Truck and Tractor business thoroughly will readily recognize the advantage to be gained from the close co-operation existing between the largest and best known auto, ae truck and tractor factories and the Michigan State — ; Auto School. Because these manufacturers endorse ur equipment, methods of instruction, and the per- mnel of the school, they furnish us with their latest chassis, motors, rear systems, etc. You can realize just what this factory co-operation means when you see our block test department with its hundred or more motors. Here you can become thoroughly familiar with practically every type of internal combustion engine in use today—not even t the stationary gas engine and farm lighting plant. Before taking up active work upon these motors our idents become thcroughly acquainted with the principles of their truction and operation, These principles are taught through — Cadillac “ eight” rated classroom lec- Because of these | Mod aa ont ee odern Equipment —— eer the “why” as the “how” of The Cadillac ‘‘eight’’ and the es. In other Liberty ‘‘twelves’’ shown here boy Aw head are but a part of our modern ; equipment. Beside the Lib- lents realize cibly the value of issroom work after ive school. When are confronted with b upon which some er mechanic who has had their training has tuck, they know the ertys, our air-plane motor de- partment includes the Gnome Rotary, Hall Scott, Roberts and Curtiss ‘‘8.”’ Instruction on these motors is given in con- nection with our Complete Automobile Course without extra iples of operation charge. Because of ourenormous equip- nd construction and can . ment our Courses cover latest models e the difficulty. Liberty “twelves” as well as models of former years. Why We Do Not Teach Auto Electrics in a Separate Course We teach Auto Electrics and teach it thoroughly. However, we do not teach it as a separate Course because the man who knows only the electrical work in connection with autos, trucks and tractors, is sure to be confronted with jobs which require a knowledge of motor mechanics as well. Thousands of Garage and Repair men are competent to care for the mechanical work but get stuck on electrical troubles. Hundreds of these men are taking- our course and are able to handle every job that comes to them. Garage owners are con- stantly asking us for our graduates. MICHIGAN STATE AUTO SCHOOL 306 Auto Bidg. 687-89 * Woodward Ave. , Detroit, Mich. Gentlemer Plea ser ’ 1 itely FREE Big - we x Our Complete Auto Course covers every possible phase of electri- city as applied to Au- tos, trucks and tractors. 76-page | trat Catalog Aut and informat as checked I+ A { 7 Auto and Tractor Guu [ , Tire Repairing [ ] Brazing“and Welding (Mark each course you are interested in) or, better still, you can expect me about “ The Detroit Auto Endorsed by all Leading Manufacturers” os NOW ICHIGAN STATE Avro SCHOOL 58 M.S. A. S. Students Receive See ee == pony oor aes Raising Detroit, Mich.,U.S.A.

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POPULAR MECHANICS ADVERTISING SECTION Learn Drafting Employers everywhere are looking for skilled draftsmen. They are offering good salaries te start with splendid chances for advancement. Drafting offers exceptional opportunities to a youngman because drafting itself not only commands good pay, but it is the first step toward success in Mechanical or Structural Engineering or Architecture. And drafting is just the kind of work a boy likes to do. There is an easy delightful way in which you can learn right at home in spare time. For 27 years the International Correspondence Schoo!s have been giving boys just the training they meed for success in Drafting and more than 200 other subjects. Thousends of boys have stepped into good positions through I. C. S. help, but never were a so great as now. Let the I. C. S. help you. in the coupon, then mark and mailit. This doesn't obligate you in the least and will bring you information that may start you on a successful career. This is your chance. Don't ietit slip by. Mark and mail this coupon now. ee eee ee ee eee eee EK OUT HERE ee eee oe BOX 5648-B SCRANTON, PA. Explain, without obtigating me, how I can qualify for the position, or in the subject, before which I mark X. JELEOTRICAL ENGINEER C)SALESMANSHIP Electric Lighting and Railwaye |) ADVERTISING Electric Wiring Window Trimmer Telegraph Engineer Show Card Writer Telephone Work — Pelsees MEOHANIOAL ENGINEER Railroad Trainman Mechanical Draftsman ILLUSTRAT ING Machine Shop Cartooning Tootmaker BUSINESS MANAGEMERD Gas Engine Operating Private Secreta OIVIL ENGINEER BOOKKEEPER Surveying and Mapping Stenographer and Typist MINE POREMAN OR ENGINES Cert. Public Accountant STATIONARY ENGINEER TRAFFIC MANAGER Marine Engineer Railway Accountant Ship Draftsman Commercial Law ARCHITECT GOOD ENGLISH Contractor and Builder Teacher Architectural! Draftsman Common Schoo! Subjects Concrete Builder CIVIL SERVICE Structural Engineer Railway Mail Clerk PLUMBING 4ND HEATING AUTOMOBILE OPERATING Sheet Metal Worker Auto Repairing ‘extile Overseer or Supt. Na tion Spanish CHEMIST AGRICULTURE Freneh atics Poultry Raising §( | Italiae Name Present Occupation Street and No. __ City.

RN EE coupon to 7-26-78 Montreal, Canada

EBD ABD EBD EBD BIG OPPORTUNITY FOR YOUNG MEN The demand formen whoknow— me; who can install or repair the electrica! system of autos, trucks, tractors or airplanes—is far in excess of the supply. There are five jobs to om man. And they are getting the best pay in the automotive industry. Spe- cialize and be a leader in the field, Learn all the details of Automotive Electricity and have an assured future with hig pay—or open a shop of your own. Our eight weeks’ course in start- ing, lighting, ignition and batteries teaches you every phase of this wor! It puts you in the expert class. Classes are limited to 20 men to insure ir vidual instruction. —. A new class starts every two weeks. Write today for details and dates of classes ope Ambu Engineering Institute 601-1601 s. Michigan Ave., CHICAGO <AMBD

GET WELL—BE YOUNG—GROW TALL Choose the work you like best | This University discove myortant benlth ifoenan boay corrects cc invention of the century It remakes and rejuvenates the It produces normal spines t frees impinged and irritate yntracted muscles, shortened |igaments, eliminates congestion, ir ~ circulation and drainage of the body. # will increase the body's "tength THE PANDICULATOR CO., 1514 Prospect Avenue, Crevelana. Vv Marvelous paca FREE You ean now learn Taxidermy, the wonder artof mounting brrds, animus, tunning skins, ¢ Learn at home, by mail. The free book

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Franklin institute Dept. 786, RUGHESTER, * Sirs: Send me ence, free of char Sample Railway M ‘xamimatian questions of other U. 8. Governm« positions new open and f book describing them. FIRST . YEAR s Spring Examinations .@ Likely Everywhere S$ Common education sufficient

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POPULAR MECHANICS ADVERTISING SECTION Why He Earns $30,000 a Year By Victor Jones Who Improved His Memory in One Evening re is perhaps the most remark- tory of memory power and it will do to send a man ahead that I have run across I learned, to my own great ad- antage, the secret of a better mem- y from David M: Roth, the famous ry expert Z 4 It is the true experience of two New York (¢ ity, who started . side by side, at the modest of $12 a wee e the facts straight from John , one of Mr. Roth's Most suc- i pupils, who began his own - lessons Tone s names Pow David M. Roth began with a poor memory himself Ile says that, more than anything else, was what set him to cultivating his own memory and working out the wonderful Roth Sys- tem which has been responsible for so many thousands of improved mem ories all over the United States. Mr Roth act tally could member a man's name twenty heing introduc ed to him. Yet today there are probably 10,000 people or more in the United whom M Roth has met at different times -meost of them not fre- sec- onds after states only once whom he can name instantly The accounts of Mr. Roth’s amaz ing memory feats have been published in new spapers all the from Seattle to New Yort into root 0 hall ind to tifty or sixty wl ile they picks out ev tells him his business cor As Mr Roth savs, the is nothing miracu lous about this ind the other on sight way r lle goes lecture } a bang ret after being introduces people turns change scats hac kh the: ery one by im and telephon 1 it T nd nection for 1 measure \nyv one cat d it apparently “im pe ble” things that so astonish M: th’s diences A Better Memory in One Evening \ Roth’s System whicl developed through ye f put into a <« r lessons, hat a twelve- d child can them—yet ‘so ive in thei revement of the memory that hundred i b seven) Tascl 1 isiness executives all over country 1 their own test t} Rott Course them Read mon) consider c vell nigt eless to this letter from Terrence 7 | lat of the 1 of Olcott. Bor ue McManus & rnst, \ttorney-s 1 Counsellors at La 170 Broad iv, and one of the most famous trial vyers it New York: “May I take it I regard y« service ng this system to the v iblic benef: The wonder- ful simplicity of the method, and the ease with which its principles may he acquired, especially ap peal to me. I may add that I already had occasion to test the effectiveness of the first two les- sons in the preparation for trial of an important aetien in which T am about to engage.” Mr. McManus didn’t put it a bit too strong. A single evening spent on the first lesson will give you the secret on which the whole Reth System is occasion to state in giv- world as a tior based. In should power. Roth’s that first easily double evening you your memury After a few hours with Mr Course you will be amaze and fascinated at the sense of confidence and power yours You will be from the artificial memory tricks to which most of us have been slaves You will learn to remember instantly Names and Faces tusiness Figures What You Read Statistics Speeches You Hear Fac:s Talks References tusiness Details Sermons and Lectures Selting Points Business Reports Legal Points Good Stories Couversations School Lessons Pictures Househetd Duties History and Date Business Appointments Streets and Numbers Social Engagements new that freed will be forever And you will find it, not hard work as you might suspect, but much fun as playing ar game For Mr. Rot! of remembering ar just ase ‘ absorbing makes the act easy, natural le tomatic precess of the mind Send No Money Don't send n penny Merely fill out and mai © coupon. By re post, all charges prepaid, the Memory tury (Course will Re tl he sent » your home complete one « ing-——more if you feel that vo ford to keep this great a re dollars to bigger respons ties—to fullest succe in life, mail it back to the publishers days and you will If a_ hette one-tenth as m1 within five nothing memory means only h to you as ] to thousands « ‘ther 1} tr and owe women, mn coupor t to d ndependent P ‘ n, Dept R 16, 319 Sixth Ave w York FREE EXAMINATION COUPON Independent Corporation Dept. R-456, 319 Sixth Ave., New York You may send me the Course or Course« checked below Within tive dave after receipt 1 will either remai! the cours: 7; courses) or send you the price indicated after each in full payment th Memory Course (£7 Ky David M. Kot! ow to Read Character at Sight (27) By Dr. K. M. H. Blackford Mastery of Speech (£7) By Frederick Houk Law. Super-Salesmansh ip (%7 By Arthur Newcomb Practical Course in Personal Efficieney (#7) By Edward Farle Purintor Ferrin Home-Account System ($3.50). By Wesley W. Ferrin Paragon Shorthand Course ($7 The Lederer Art Course ($7 By Charles Lederer Independent Weekly (85 52 Teenes 15¢ per Copy Name

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POPULAR MECHANICS ADVERTISING SECTION

Bee AUTOS ARE uy Right NOW is YOUR OPPORTUNITY to get into the GREATEST INDUSTRY the World has ever known Automobiles-MotorTrucks-Tractors »! and manufacturers. A school built and equipped at a cost of more than a r quarter of a million dollars and operated for the sole purpose of affording ambitious men opportunities to better their positions and win greater success. You Can Learn Easily and at a Small Expense at the Detroit Institute of Technology Practical, common sense methods of instruction—INTENSIFIED by 25 years’ experience — over 3,000 enrollments last year. You don’t need any experi« nce! a course _ — s School will quickly fit you to do well paid work get the hig 1e need for trained men in the factories and on the farms is acute AND “THE DE Me ‘4 ND IS INCREASING ! The Automobile busi ess will suas to grow, the manufacture of Motor Trucks promises to. eclipse all records of auto production, AND THE FARM TRACTOR INDUSTRY 1S JU wholes’ Lyk aNCY. TRAINED MEN to build, to sell, to operate, and repair these outputs ARE \D WILL BE NEEDED by the tens of thousands. There is an unlimited field for ae yo ing man equipped by proper training to start and his own garage—and make big profits. Many of our graduates have proven this. operate his MACHINE SHOP COURS Our shop — equipped with over $40,000 worth of stand- ard machines, the largest training shop of its kind in the country — trains Lathe, Milling Machine and Shaper operators to get $6 to $8 a day. Day and evening classes. Hundredstake evening course without interfering with day work. Complete Toolmaking Course— write for details. We assist students in securing employment.

Can you ask for stronger proof o of our School's standing than that MEN WHO KNOW give f. eel of their products, their money and their time to cooperate with us? Among the contrib- utorsto our equipment are Studebaker, Buick, I upp Chalmers, Packard, Hudson, Gray & Davis, Delco glad te nec uA u enroll « not y ytime. Write to« 7 * . . . ° iy . Address 4 Machine Shop . . . . s . . . . . + Complete Auto AUTOMOTIVE SCHOOL Brazing & Welding Tire Repair Detroit Institute of Technology 301 Y. M. C. A, Bitq., DETROIT, MICH. & Tractor Course (I expect to be in Detroit about nd will cal Signed Address Piease Mention Popular Mechanics

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POPULAR MECHANICS ADVERTISING SECTION Sherwin Cody’s “100% Self-Correcting Method” Improves Your English at Once You are sized up every day by the way you speak and write. The words you use, the way you use them, how you spell them, your punctuation, your grammar—all of these tell your story more plainly than anything else you do. And it is a story open to all. An unusual command of lan- guage enables you to present your ideas, in speech or on paper, clearly, forcefully, convincingly. A simple method has been invented by which you can acquire a command of the English language from the gr ound up. Sherwin Cody, perhaps the best known teacher of practical English, after twenty years of research and study, has perfected an invention which places the ability to talk and write with correctness and force within reach of every one with ordinary intelli- Sherwin Cody was amazed to discover that the average person in school or in business is only 61% effi- gence cient in the vital points of English grammar. That is be- cause the methods of teaching English in school left you only a hazy idea of the subject—the rules would not stick in your mind. But Sherwin Cody’s new invention upsets all old standards of teac hing English. His students se- cured more improvement in five weeks than had previ- ously been obtained by omer pee in two years. Only 15 minutes aday of spare time with “100% Self-Correcting Methed” soon begins to give you an easy anal of language. “100% Self-Correcting Method” On Oct. 15, 1918, Mr. Cody was granted a patent on his unique device, and now he places it at your disposal. It ove = the only weak point in instruction-bv-mail. nat command the exact words <0 oa tually takes the place of an instructor at your elbow. press your ideas, this booklet will be a revela. RB s you lessons in Letter Writing, Spelling, Punctua- tion to y Merely mai! the e« upon and iummar, Reading, and Conversation, corrects them for — be ont by return mail. Learn how inticipates your questions. It even grades your paper pene easy to aa n_makes Ao oo ~ 1 you your class percentage till you reach the 100% ae << A, e ~. ¥o9 If you feel your lack of Language Power, if you are ever embarrassed by mistakes in gram- mar, spelling, or punctuation, if you can- 15 minutes of your daily pe » time Cody has written a let explaining his new course in detail. Sherwin Cody School of English 2.3272." 56 News Bldg. Rochester, N. ee if

inderPrin — er Earn $2,500 to $5,000 a Year associate with Solve mystery Learn science of absolute or ontification, big men, detectives, lawyers, bankers. and crime, travel and see the world. You can do this if you will spend a = s Train Yourself in Spare Time short time each day in the study of finger print identification. The demand for finger print experts 1s growing every day and the field is unlimited. The work is so fascinating and-yo Most Fascinating Profession in the World progress so rapid that you will od delighted to study. It grips you right from the start, puts new life and enthusiasm into you. You want to be looked up to, you want to be recognized as a shrewd man and this is all within your reach Devote your time and thought to finger print identification. There is nothing in the world that will Get in a profession that’s not overcrowded. pay such large dividends in both inspiration and dollars. There are good paying positions waiting for you. Big Demand for Experts is far in excess of supply. The demand for our students

a you were ready today to receive our diploma, I would recommend you

for one of the waiting positions we now have, paying from $2,500 to $5,000 a year. Traveling everywhere, staying in good hotels, meeting the best of people and doing a most interesting work. ee ” Send for my wonderful book Finger Print Facts ” FREE fore ere te tenis you how Hicks’ Remarkable System has opened a new earning era for hundreds of men. You can be one of them—simply send coupon for full information. Do it now. Federal Finger Print Institute, Inc. 619 Kemper Bidg., KANSAS CITY, MO.

Federal Finger Print Institute, Inc. 619 Kemper Bidg., KANSAS CITY, MO. Without FREE Illustrated book, “ and special offer. obligation to me, please send your Finger Print Fact~« Name..

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Tobacco Tellson "4 Nervous System from You _ the Pleasures, Com- forts, Luxuries of Life POPULAR MECHANICS ADVERTISING SECTION Tobacco Habit Banished In 48 to 72 Hours — Immediate Results Trying to quit the tobacco habit unaided is a losing fight against heavy odds, and means a serious shock to your nervous system. So don’t try it! Make the tobacco habit quit you. It willquit you if you will just take Tobacco Redeemer according to directions. It doesn’t make a particle of difference whether you’ve been a user of tobacco for a single month or 50 years, or how much you use, or in what form you use it. Whether you smoke cigars, cigarettes, pipe, chew plug or fine cut or use snuff—Tobacco Redeemer will positively remove all craving for tobacco in any form in from 48 to 72 hours. Your tobacco craving will begin to decrease after the very first dose—there’s no long waiting for results. Tobacco Redeemer contains no habit-forming drugs of any kind and is the most marvelously quick, absolutely scientific and thoroughly reliable remedy for the tobacco habit. Not a Substitute Tobacco Redeemer is in no sense a substitute for tobacco, but is a radical, efficient treatment. After finishing the treatment you have absolutely no desire to use tobacco again or to continue the use of the remedy. It quiets the nerves, and will make you feel better in every way. If youreally want to quit the tobacco habit —get rid of it so completely that when you see others using it, it will not awaken the slightest desire in you— you should at once begin a course of Tobacco Redeemer treatment for the habit. Results Absolutely Guaranteed A single trial will convince the most skep- tical. Our legal, binding, money-back guar- DS, antee goes with each full treatment. If Z \ Tobacco Redeemer fails to banish the tobacco habit when taken according to the plain and easy directions, your money will be “ x A cheerfully refunded upon demand. 2 Let Us Send You Fre: Book Coupon Convincing Proof NEWELL PHARMACAL CO., . « If you’re a slave of the tobacco Dept. 300 ; f : St. Louis, M habit and want to find a sure, quick way Please send, without obligating me in ar of quitting **for keeps” you owe it to your free booklet regarding the tobacco | yourself and to your family to mail the proof that Tobacco Redeemer will positi coupon below or send your name and me from the tobacco habit. address on a postal and receive our free booklet on the deadly effect of tobacco , on the humansystem, and positive proof Pe incisincsemsememnnaiins that Tobacco Redeemer will quickly free you from the habit. Street O06 WWeicccccccceccccscccesccccccsceseveteceeessaccscccee ss Newell Pharmacal Company Dept. 300 St. Louis, Mo. i Town Pledse Mention Popular Mechanic

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POPULAR MECHANICS ADVERTISING SECTION The simplicity of this method will astound You will be amazed at your own rapid ‘ogress. You learn by mail—yet you receive rsonal instruction from one of America’s fore- st Commercial Artists — Will H. Chandlee. t into this fascinating game NOW. Youcan ly qualify. A few minutes’ study each day | that is needed. Crying Demand for Trained Artists New spapers, advertising ines, business concerns —al)l are looking for and women to handle their art work. [here are hundreds of vacancies right this minute! A trained commercial artist can com- mand almost any salary he wants. Cartoonists and designers are ata premium. Dozens of our students started work at a high salary. Many earn more than the cost of the course while they are learning! YOU—with a little spare- time study in your own home — can easily and quickly get one of these big-payingartists’ jobs. No Talent Needed This amazing method has exploded the old idea that talent is an absolute necessity in art. Just as you have learned to write, this new method teaches you to draw. We start you with straight lines, then curves. Then you agencies, maga- New Easy Way Become An Artist r¥XHIS wonderful new method makes it possible for anyone to learn l\lustrating, Cartooning, or Commercial Art. students are now making splendid incomes. Hundreds of our And most of them er touched a drawing pencil before they studied with us. learn how to put them together. Now you begin making pictures. Shading, action, per- spective, and all the rest follow in their right order, until you are making pictures that bring you from $50 to $500 or more! Many artists get as high as $1000 for a single drawing! Write for Interesting Free Book Mail coupon now for this interesting free book ‘‘How to Become an Artist.’’ about this amazing method in detail. Tells of our students—and their wonderful progress and how we can qualify you for a high-salaried artist’s position. Also tells of our free artist’s outfit and special low offer to a limited number of new students. Mail coupon NOW! Washington School of Art 1096 H Street, N. W. Washington, D. C. seneneeneeeeees FREE, COUPON *:*0+002008 WASHINGTON SCHOOL OF ART, Inc., 1096 H Street, N. W., Washington, D. C. Please send me, without cost or obligation on my part, your free book, “How to Become an Artist. Explains Name ee

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POPULAR MECHANICS (Clip out this Ad.) HORACE GREELEY SAID: “Young Man,Go West" There are countless opportunities in the West for PTRALINED MECHANICS. A few weeks of PRAC- ricAL training atthe Coast's biggest school will equip you with the skill and knowledge capable to EARN $150 to$400 MONTH COME TO LOS ANGELES LEARN AUTOS & TRACTORS Our big institution is equipped with every fa- cility for teaching you thoroughly andefficient] alltypesof auto, aeroplaneand tractor motors Latest starting, lighting and ignition systems big machine andrepair shops, vulcanizing dept., homelighting outfits,etc. 10-acreTractor Field COURSES IN AUTOMOTIVE) == Tractor Work Auto Repairing Ignition S « a O O L Battery Work Vulcanizing Welding (Established 1905) test Learn in comfort. Los Angeles is the coolest, most refreshing spotin Summer. You can earn room and board while learning 6000 Graduates No time limit WRITE FOR BIG FREE> CATALOG > 72 pages of vital information, pro- fusely illustrated. Write for it aut est pice wer parent i oP ve DATE EQuIPM Please Mention Popular Mechanics NATIONAL AUTOMOTIVE SCHOOL F ADVERTISING SECTION Lots of fun boys, fooling the teacher, policema, or friends. Anyone can be a ventriloquist . 32-page book expl: t all. Wi é 2-page be explains it all. ith above w: will give THE VENTRILO whistle, a little instrument that fits in the mout) out of sight for imitating all kinds of bird ca! never fails. Price of both 10c. Big Value for 10 Cents 6 Songs, words and music; 25 Pictures} Girls; 40 Ways to Make Money; 1 Mavic k 1 Book Letter Writing; 1 Dream Book i Fortune Teller; 1 Cook Book; 1 Basebal! | giving rules for games; 1 Toy Maker | Language of Flowers; 1 Morse Telegr phabet; 12 Chemical Experiments; Ma Table; Great North Pole Game; 100 Conundrums: 5 Pugzios 12 Games; 30 Verses for Autograph Albums. Ail the above by mai! for 10c. ENCHANTED BARREL The Most Wonderful Pocket Trick Made CHANGE A CENT INTO A DIME Ask your friend to drop a dime in the barre]. W | x he takes it out Behold! It isa CENT 9 cents every time you fool them Never fails [hey cannot get on to it. Sample barre! with directions Only.........sesceee. ; 12c NEW FORD JOKE BOOK 1920 All the latest jokes on the Ford auto. Hundreds of the: and all good ones. Spring a new one on your neis r Large book with colored cover by mail, 10¢ — co 4 ar ee This is STAGE MONEY Looks like the GENUINE S1 I Some Green backs and some Y backs. Create a BIG sensatior your friends. The girls w after you when they see the wa roll of 15 pieces by mail 10 cents. ROGEN X-RAY Price 12 cents HERE, BOYS, is ju “you want. With tt strument you can apparently bones in your fingers. Think of the fur have with it. Sample by mail, 12 CENTS. SKULL RIN Here is a handsome, up-to-date I representing a Skull and.Cr Has stones in the eyes and thing frightful. Wome wont but for menor boysit isag Sample by mail, 15c¢ Electric Push Button An original novelty, an exact e Electric Push Button A metal 1¢ back so th Lig’ of the vest por ching you ~“lge of your ce x} your New Electric Bell, when he ecting to hear it ring ss » liveliest dancing you ¢ t ve t onthe button at one touches it, you will see nessed The Electric Button contains a pin which wil! ; smart shock when button is pressed. Never fails. Price 12: ROYAL NOVELTY CO. 455 East Avenue SOUTH NORWALK, ©! ICHTMIN HEALER UTS, WOUNDS, BURNS, BON LARORATORIF

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POPULAR MECHANICS ADVERTISING SECTION

QUICK, THOROUGH TRAINING ° quickly, and our 21 years of suecess proves we train youthor vugh! Our thousands , ‘ re now holding big positions all over ; We n them to make good in any one t g-paying branches of the electrical fonds: wis of our graduates are big eiectrical * ) per week through practical instruction by ex Covers many jobs open for Coyne s cte course, taught thorouguly yet quickly, at small cost trained men! Tells of great successes of oe ‘ BENNETT W. COOKE, President Coyne graduates. Get this book by o . . . all means! It’s free. Merely fill a Coyne Trade and Engineering Schools the coupon, stating wh h tradevou are ro } Dept. 16 39-51 E, Mlinois Street, CHICAGO

interested in, and mail it now—at once!

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64 POPULAR MECHANI€S ADVERTISING SECTION Earn $50 to $150 Weekly As a Traffic Man Learn Professional Traffic Management Unusual Opportunities await trained men in this field. 3usiness institutions everywhere are forced to seek the services of competent Traffic Men. Constantly changing conditions Bie trained men to understand and solve the problems that arise. Bi salaries are paid to men who can overcome the sse difficulties. YOU -_ fit yourself todothis pleasant work and command asalary of from $3,500 to $10,000 yearly. Pleasant Work—Easy to Learn . ' ; sc —— how "2 bd . Spare time study —a few hours Our Course Highly Practical | each week — will soon fit you to Entir cena 2 ie ed - - ntire course of instruction given by pr fill such a position. The work is i nD tical, experienced, successful traffic men, Thi easy, the surroundings pleasant and you Hi counsel and advice come from their d become a man among big, successful men SapeEnenss, Suey Snow She Ree ae epee é ‘ an ‘ cy § : , ments and they know the methods and infor witha private office, prestige—and Success! mation necessary to meet them, hence Positions are permanent and lead to bigger amply titted to successfully teach othe: opportunities constantly. - pee pene ee TRAFFIC MANAGER R. R. TRAFFIC MEN Your Success Depends on YOU! Pest Gendunté Cannes Free Mere wishingand hoping will not bring results. Stason textrac sp juate *s are priv ike ge d to use thi : - ; ; out ¢ Ke t erie nra You n ust get action if you would climb, Phe ,socuting.cless ficati ns and pac king f rey ant me featu ditference between “wages’’ and “‘salary’’ is in not fered elsewhere ‘ing able to do something the crowd can’t of preparation it . The man willing to TRAFFIC MANAGERS’ salaries range ce of preparation gets the big from $3,000 to $25,000 yearly. Get out of the rut! Don't drift. Be TRAFFIC BUREAUS earn from $2,000 a winner not aw isher and loser Give your. to $10,000 yearly. TRAFFIC BUREAU sleasant job at : awaits you i TRAFFIC SECRETARIES in Chambers oem seein ats By — med earn from $2,500 to @ at a yearly. tuanapéutration RSTATE COMMERCE RG GG ear res wa! assets Traffic School, 26 Traffic Bldg., Ft. Wagnaied, | mann STAC E [ tell you how! Fascinating profession for either sex. B FP Dem at a step for ‘Snseees “Write Today! 4s aries. Experience unnecessary. Splendid engagements always me waiting. Opportunity fortravel. Theatrical agents and aut + \ ties endorse my methods. Thirty years’ experience as manager and performer. Illustrated book “All About Vaudeville” absolutely Fete. Send me your name and address TODAY FREDERIC LA DELLE Sta. 182 JACKSON, MICH Auto, Tractor, Aero IN 6 TO 8 WEEKS | | a. a pene man. Learn froma practical man | with practical experience. Here are my quali- | fications; if some other instructor can show you more experience and better results, go to him —if not—in justice to yourself, learn from me. OFFERS YOU Qualifications:—Motor Mechanic, 19 years: Auto School Director, 11 years; Aviator, 8 years: Chief Test Officer at Mineola Aviation Field and Commanding Officer of Luf- bury Aviation Field during the great war (I closed my A brilliant future and handsome earnings await you school to serve Uncle Sam, but it’s open now). in the great field of Electricity. There are not enough trained men to Ifil the splendid positions now open. %@ Aviation BE Hocan’s “i:° School 8© ELECTRICAL ENGINEER Get Your B.S. Degree in 3 Years BE A REAL MOTOR EXPERT. Learn from a are a high school graduate, you can become practical man with practical experience. Hogan’s Grad- ‘ Electr ro cosines h ty per + ~e a lined ; . - uates are earning big money as auto, tractor and aero ies tical instruction én big, full omianell olex j mechanics and as garage owners—for with training it laboratories, Provisions for making up deficient high costs little to start a paying garage. school credits in our Institute of Electrotechnics Make Your Start NOW. Learnto f— — = = — One Year Course in Practical Electricity Also Electrical and Mechanical Drafting; Automotive EARN BIG MONEY! 4 MR. HOGAN enter einer 83to8 months; Armature Winding and “ . % Motor-Generator Repair, 6 menths; Radio Telegray ; Send in this Coupon. Send me FREE, full Extension Courses. *‘Earn While You Learn” system information either alternate week or half day employment Frater . nae 7 : Hogan’s Aviation, Auto 4 ‘ nity Hous Soard and Room at cost \th let cs. NEW TERM grens JULY 2nd. Writ and Tractor School 7 Ace.... Am A tad staan reed : 50 Hogan Bldg, / .. SCHOOL OF ENC! NG OF MILWAUKE Name ; ; Dept. 36, 373 Broadway Milwaukee, Wis. KANSAS CITY, MO. 7 “s ' ; 4 Town Please Mention Popular VWecehanics

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— eel ” eS —<__ -

POPULAR MECHANICS ADVERTISING SECTION

Mechanical Engineering Learn at Home! Employers everywhere are looking for men with me chanical ability, Splendid salaries and rapid advancement are offered those with special training. There is an easy, delightful way in which you can learn right at home in spare time. Schools have been giving men and ry women just the training they need for successin mechanical engineer- ing and more than 200 other sub- jects. Hundreds of thousands have stepped into good positions through I. C. S. help, but never were opportunities sO great as now. Let the I. C.S. help you. Choose the work you like best in the coupon, then mark and mailit today. This doesn’t obligate you in the least and it will bring you information that will start you on a successful career. This is yourchance. Don’tletit slip by. The most important thing you have to do is to mark and mail this coupon now. For 28 years the International Correspon dence — a ee TEAR OUT HERE INTERNATIONAL CORRESPONDENCE SCHOOLS BOX 5647 B, SCRANTON, PA Explain, witnout obligating me, how I can qualify for the pos Electric Lighting and Rallways ELECTRICAL ENGINEER Electric Wiring Telegraph Engineer ) Telephone Work MECHANIOAL ENGINEER Mechanical Draftsman Machine Shop Practice loolmaker Gas Engine Operating OIVIL ENGINEER Surveying and Mapping MINE FOREMAN OR ENGINEER STATIONARY ENGINEER Marine Engineer Ly Ship Deetemee [) ARCHITECT Contractor and Builder Architectural Drafteman Concrete —. )Structura!l Engin PLUMBING AND HEATING Sheet Metal Worker Textile Overseer or Supt. CHEMIST Mathematics Name tion, or in the subject, before which I mark X. ADVERTISING Window Trimmer Show Card Writer Sign Painter Railroad Trainman ILLUSTRATING Cartooning \_) BUSINESS MANAGEMENT ”) Private Secretary |) BOOKKEEPER Stenographer and Typist LG ert. Public Accountant “TRAFFIC MANAGER Railway Accountant _) Commercial Law Sic OOD ENGLISH = Teacher . Common oes Subjects “CIVIL SERVICE Railway Mail C lerk 5 AUTOMOBILE OPERATING Aato Repairing Navigation (2 Spanish ; ) SALESMAN SHIP = AGRICULTURE Freneb C) Pealtry Raising Italiane

Present Occupation Street and No. a

bs aatneeeminnisiiniinedtiad Please Mention Popular Mechanics Ce enadians | may send | thie oc yupon to 7 » Mon faternahonai Corresp

Page 224

Goon hand-writing has been truly called the “Bread and but- | ter of a business education.”’ It should be the determina- | tion of every body to learn to write at least a good business hand. Good writing is the very foundation of business success. | Eas to Learn By my system you can become j yY a good penman at home,in your own room during spare time. Don’t be content with the notion that good penmen “‘are born’’ such. Because one’s ancestors may have been noted for poor penmanship, is no excuse forhim to remain an illegible scribbler. My system is original, unique, and highly successful —the result of 25 years’ experience, Your Spare Time Just your spare moments —that’salllask. If you follow my instructions you will soon be able to write @ beauti- ful hand that will be a source of pride to yourself and envy to your ‘friends Notice the improvement shown in Mr. Campbell’s writing below. “Tam astonished at the improvement I've made by means of The Tamblyn System in so short time.” LELAND M. CAMPBELL, Campbelltown, tiene! 77; C2 ‘La bad Le Aa ‘ Mr. Campbell wrote his upper signature July 20, and the lower one November 10—a little less than 4 months apart. Hundreds and hundreds of others in all parts of the world are doing as well with my system I have had unbounded success in making poor writers good ones and good writers better penmen than they thought possible

Ohio

Wor rv - , SOA oom uf Dorman VPLS — BOOK WRITE

Penmanship is particularly adapted to correspondence instruction, and I absolutely guarantee satisfactory im- provement, Distance no barrier. Ladies taught just as successfully as men. Don’t wait, don’t delay, begin now to prepare for that posi-e tion where good pen- manship will be re- quired Send today for my Free Book, “How to Become e Good Penman,” which P FIDQIIPA*DSE, Op

2g contains copies and Bil beautiful specimens and 6)\\ tells how others have be- %\ come good penmen by Ay mean of the Tamblyn System Your name will be beautifully written on a card with white ink if you enclose stamp F. W. TAMBLYN, 418 Ridge Building, Kansas City, Mo., U.S.A. os

F. W. TAMBLYN, 418 Ridge Bidg., Kansas City, Mo., U.S. A. 1 am Interested in improving my penmanship. | me free your Book ‘* How to Become a Good Penman. tee eeeereeeneeeees j Address ....... Sign and mail this teday, before you forget it.

JFREE

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POPULAR MECHANICS ADVERTISING SECTION

How towrite, whatto write and where to sell. iil Cultivate your mind. Devel lop | your literary gifts. Master } art of self-expression.Make | your spare time profitable i Turn your ideas into dollar: Courses in Short-Story Wri iW ing, Versification, Journalis: ii Play Writing, Photo; 7 Writing, etc., taught person- [jf Dr.Esenwein ally by Dr. J. Berg Esenw: for many years editor of Lippincott’s Magazine, a il a staff of literary experts. Constructive critici | Frank, honest, helpful advice. Real teachin I

One pupil has received over $5,000 for stories and articles it written mostly in spare time—“‘play work,” he calls | Another pupil received over $1,000 before completing ul} her first course. Another, a busy wife and mother 1 averaging over $75 a week from photoplay writing alone ‘ti There is no other institution or agency doing so mu if} £ ) £ writers, young or old. The universities recognize t! f iT one hundred members of the English faculties of higher t

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We sls HT magazine for literary wor @ copy ‘ hing service, we off >t100 $2.00, Besides ou

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Ukulele, Mandolin, Guitar, Cornet or Banjo of teaching note mus I n we give a Sut Cornet len small charge for lessons only. Ws TEN OR BANJO Hawaiian Guitar, Vio Wonderful new system goer, a come locality ilele, Guitar, Hawaiian Guitar, ibsolutely free. Very charge. Com pleteoutfit free.W rite r w. N SLINGERLAND SCHOOL OF MUSIC, Inc., Dept. 155, CHICAGO, ILL saccess orn

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see POPULAR MECHANICS ADVERTISING SECTION By a Little Finger - Print The ‘ went off like clockwork—a clean getaway with $1 Mike O'Day laughed up his sleeve when he 1 t account of it in the morning paper it he 1 too soon, When Richard Cutler, t fir pert, took up the case, it was only { moments for him to discover four t ints on the window ledge. Within the prints were identified at head 1 the net had closed about the un M Cutler had spent only one day on his pay was a $500 reward. Be a Finger-Print Detective get into this fascinating game? The 1 i eon r-print experts is Seaan” woene day. ng and highly paid vocation is alive with | opportunities. The need is immediate. Gov rporations, police departments, institutions 1 lua are constantly in need of trained cperts. The field is as wide as the world, g, the work is intensely interesting. No what vour present occupation is, you can learn to be a Pir ger-Print Expert. Our won- new met od trains you at home to fill one of FREE Secret Service Course ited time or we are offering a free course Services. of mum act now you will get two for the price ¢ me. Both courses go hand in g inval abl le aid to each other. The fre is founded on the deductions of most noted criminologists. It actu the detection of crime a simple study in n sens Bs th are yours for the cost of ons 1 wi an This exceptional offer may never now. Write For Free Book r our free book on Finger Prints, which w glad to send you without any cost or obliga non your part. Find out about the wonderful op. unities which are now within your re _ or t it off until tomorrow Write us today way to future success. nd pav “ | =| = ee ee ae oe ae ae i I University of Applied Science Desk No. A-119, 1920 Sunnyside Ave., Chicago * Please send me your free book on Finger Prints and details your free Secret Service Course, NED sicsksieninwoess ADDRESs. Orry Aare | | AULopseler-y signal Engineer FREE Book Tells How Do you want to earn big pay and win swift promotion? Want to get out of the rut and jump Quickly t a position of autho ty ar 1 im} rtar ? Then ‘ i E t cal Sig il I r} i aq k for I e ] str d I } that 8 ‘ quick- lv « . \ your spare time. A fasc inating big job, paying § to §$ ) a year, we mie ne ame na 1 it ‘ l new profession nd at ¢ FREE _we Big Outfits If You Act Quick! _ af. ~“* A a ] i er hour! i i f il d iils i ( outfit rREI ] 1 doing expert Complete Course in Practical ELECTRICITY wonderful op] tu t hk i‘t DEPARTMENT OF SIGNALING, Dept. A-119 1924 Sunnyside Ave. $3 Chicago, lil. =e es oe FREE BOOK COUPON = = = == Department of Signaling, Dept. A-119 1924 _— Ave., Chicago, IIL. ease send me wit ligat - rt cour bie cow Mastented Beck hiectrical Signal Engines ‘ Also tal f r great ape | Free Outfits NAME STREET .. Orry.. were : STaTE AGE.. ees OCCUPATION Please Mention Popular Mechanics

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68 World’s Greatest Books LL the books worth reading — 560 classics—the cream A of all literature—condensed to 20 brilliant volumes. The substance all standard works, with- out a dull line! All 20 volumes sent on receipt of $1.00. Neither time nor money now stands in the way of knowl- edge, The drudgery of a well-rounded education eliminated by two famous editors — Lord Northeliffe of England, and S. S. McClure of America. They have condensed the vital, living parts of 560 great volumes which mirror the des struggles, motives, history of all peoples. 560 Classics Boiled Down 20 Sparkling Volumes meat —of ires, ()NE thousand dollar’s wort f books represented in this compressed librar It would be a five vears’ task to read them in original form! But as ndensed, you will fairly race tl uzh them heir reading ea abr iedu t 1 the world of letters, that would tak ears of digging and delving linary study Carnegie sa if this set hey’ re nuggets of gold in small compass ure tensified by knowledge of life =! $ Pleasures iiiuct throm ise readin Bal ca wri - with life's re ties—leave the mind keen € oie ‘ Huco reve s humanit in its nakedness. Shakespeare's word. pic ‘ re life if Samuel Pepys’ Dinar peaks a universa guage R 1 sparkling memoirs of Madame DeStael. Glean histor rt, drama, scien sll in fascinating 1 guage sket i y master hands The r reading will give se and mnvers yal abilitv—soc in business You risk nothin Use oupon below ae $1.00 back if not satisfied 93 TEAR OUT, SIGN AND MAIL TODAY “BG SSS SESS eee eee SSS eeeeeeseeeeseseeceeaee Ld Western Newspaper Association Cy ’ 40 S. Dearborn St., Chicago Fe ler ed send me n apr al THI Silk th WORLD GREATEST BOO}! $25.00 oe iT Grce ham, Lol emit thir ur y t lt hase pr is paid as offe i ‘ Ml Name..... Street and No. P. O...... O600000-e0ecee8 . State POPULAR MECHANICS ADVERTISING SECTION STUDY ay mai) ENGINEERING Reinforced Concrete Engineering Structural Steel Designing Structural Drafting Concrete Drafting and Estimating Are you able to design and estimate the cost and all types of structures in Reinforced Cor Steel or Wood? And are your designs safe, eco a] if not, WHY NOT SPECIAL COURSES OF HOME STUDY have been arranged by a well known engineer and up to the minute? years’ experience in this country and abroad; the meeting a long felt want Men with a High School education are as quali take up these courses of work as technical grad Ideal work for the man who wants to “brush up being away. These are courses in experience You learn tod work by actually doing it. A chance for the ambi man to get ahead. Descriptive literature sent upon request . WRITE FOR IT TODAY WILSON ENGINEERING CORPORATION BROADWAY : HANOVER, MASS | STATEMENT OF THI I ow NERS] IP, MANAGEMENT, ¢ ( LATION, ETC., KREQUIR ED BY THE ACT OF CONGR! AUGUST 24, 1912, of Popular Mechanics Magazine, ; wh monthly at Chicago, l1l., for April Ist, 1920, State of Illinois, County of Cook Ke e me, @ notary ’ ty aforesaid, pe appeared H. H. Winds a rding to law and says that he is the litor anc anager of the Popular Ms vow ledge and beli« t bodied in section 44% er this form, to wit he managing © litor, } No. Michigan A ichip i : ( Mana ; "ll rs are sive names ar ac ‘ its name and the names and ac ne 1p r more of the total an tofs I First Trust and Savi ngs I —_ TI tee f H tt bo olders, mortgage i other sect cent or m re of total amount of t 8, there are none so state): None. 4. That the t ) ne khe sand ‘ i we " cases where the r ee » company as trustee or in an other f rporation for w me t ager « ta estater t ‘ lief as to the circumstances a olders who not appea on et ties in @ car ty other t r reason to be e that ar a inter t dir t or indirect ar a stated ? n H H W Th DSoOr } Sworn to and subscribed before me tt 26th day of March. 1 } GRAMAM (My commission expires June 17, 19 ) —Blue Print Reading- Made easy with our $2.00 instructions. will enable you to master the principle correctly and rapidly read any of those bh f prints that you call hard. Your money Educational Institt Detroit, Mi funded if not satisfied. 188 Rowland Building, GOVT JOBS rt hours, pany. wort No strikes No hard times teady, tion etime po $150 a month to start. Quick prom« If you are an American Citizen f over write for FREI book th about these ind many other w advantages offered by U.S. Gover silway Mail, Post Office, Custom — Inte ci Revenue, Immigra Rural Carrier. Panama Canal and other divisic: Prepar nder fort Service Secretary-Examiner. You can qu salif y r FREE BOOK ial 20 Day Offer NOW PATTERSON CIVIL SERVICE SCHOOL, 86 News Bldg Please Mention Vechanis Rochester Popula

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=x — lL POPULAR MECHANICS ADVERTISING SECTION 69 Make Your Mind a File—Not a Pile— S your mind like ascrap pile-- heaped up with a lot of unre- lated, unclassified, unindexed facts? When you want to remem- ber a name, place or date, must you grope uncertainly in this mixed-up pile seeking in vain to locate the desired information? And finally, in embarrassment, give it up? Summoned on any occasion to give facts and figures —does your mind becomea blank? When suddenly called upon to speak—do you seek wildly to collect your PROF. 1ENRY DICKSON, Stop Forgetting By Prof. Henry Dickson ever before. Every manin every place will find a reliable, efficient memory an asset of the utmost value. Whatever may be your po- sition, send now for information, DICKSON MEMORY TRAIN- ING HAS HELPED THOUSANDS Mail coupon or send postal for statements from students who had exceedingly poor memories and developed them to perfection —and men with remarkably good memories, who : , » thoughts—utter made them even s foremo orit > . (‘rst ant imate few common-| Perfect Your Memory | peter. ci The Dickson Trained mind is Dickson Memory School, enue, Evanston, fi, Place remarks— and sit down— and You Can Command 10 minutes daily Give me as well ordered as a cross- dezxed file and I will make eames humiliated? Without Memory, all the know- . your mind an infallible classified index, o- in the world becomes worthless. “Stop What Salary You Will j ; Forgetting’ ‘makes your mind a jile—nota pile. from which you can instantly select facta, I CAN MAKE YOUR MIND AS SYSTEMATIC AND FOR- GET-PROOF AS A CARD INDEX FILE —master of your mind's infinite ramifications—instead of a victim of its disordered details. My course of Memory Training per- fected by 20 years’ experience, is universally recognized as the most thorough, practical and simplest system of its kind now before the public. My system so thoroughly trains the memory that you will be able to classify impressions, ideas, names, facts and arguments and have them ready ata moment's notice. It de- velops concentration—overcomes selfconsciousness, bashfulness — The average mind resemblesqa @nables you to address an audi- ‘scrap pile ence intelligently without notes. IMPORTANT NOW time has been more op- tune than the present train the memory and powers of concentra- tion. Business from now on will be more intensive than figures, names, faces, arguments, SPECIAL OFFER ON “HOW TO SPEAK IN PUBLIC This de luxe, handsomely illustrated, richly bound book—regularly priced at $2—free to every student who en- rolls. The book will train you to think on your feet—toexpress yourself clear- ly, logically and convincingly, wheth- er talking to one personora thousand, GET MY BOOK ON “HOW TO REMEMBER” Simply send your name and address on the coupon or postal for this re- markable book, I will also send you a free copy of my unique copy- righted Memory Test. T prot. Henry Dickson, Principal | Dickson School of Memory, Dept. 1705, 1041 Chicago Ave., Evanstun, Il. Send me your Free Book *‘How to Remember,”" also particulars how to obtain a free copy of Dickson’s “‘How to Speak in Public, also remarkable Memory Test free. PPUTITTTII ITT ra EASY LETTERING A well printed book containing 40 ALPHABETS OVER 14,000 COPIES SOLD Paper Cover. Price, Postpaid, 75 cents SPON & CHAMBERLAIN, 123 P.M. Liberty St., NEW YORK, U.S. A, ANY BOOK IN PRINT Delivered at your door; standard authors, fine editions. new books. all at biggest savings. Be sure to send postcard for Clarkson's catalog. Write for our great book catalog. This catalog is a short course in literature and is 80 used by some of An. erica’s leading universities.; 300,000 book lovers buy from it. Free if you write now. DAVID B. CLARKSON sroxes 615 CLARKSON BUILDING, CHICAGO, ILLS. Please Mention DF tg cccccccvccccccccccccccccccccscccccoccc ccs MMBccccccccocesescccees oo You can be cured ¢ gute kly permppentiy « ar ad pri vately Ww big me personally fc » boo Ww p Stam Samuel A. iy or bre “pris. _ Stammerers’ ‘i stitute 246 Huntington Ave. Boston, 17 Mass BE AN ARTI We can teach you t DRAWING in | fd ‘“ your own home i ‘ during your spare time. - Our 28 years of success- ful teaching prove out ability. 10 Courses in Commercial and Illus- trative Drawing, Teachers Normal and Applied Art. Endorsed by high art authorities. Students trained by members of our Faculty are filling bhigh-sala- riled positt me Artist's Sutnt FREE to YEAR BOOK Enrolled Students. Write today for Art Year «FREE vou t Book. SCH@L“APPLED ART AppuepAnTBirc.No. 2 BATTLECREEK MICH. Popular Mechanics

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as ‘ i hl, tl “Here’ san Extra $50! “I’m making rea/ money now! Yes, I’ve | been keeping it a secret until pay day 4) came. I’ve been promoted with an in- crease of $50a month. And the first extra Hj] moneyis yours. Justa little reward for | urging me to study at home. The boss says my spare time training has made me a valuable man to the firm and there’s more money coming soon. We’re startin iH §6up easy street, Grace, thanks to you an NM thel.¢.S Today more than ever before, money is what \ counts. You can’t get along on what you have been making. Somehow, you've simply got to in- | crease your earnings. H Fortunately for you there is an unfailing way to i} doit. Train yourself for bigger work, learn to do il some one thing well and employers will be glad to i} pay you real money for your special knowledge | You can get the training that will prepare you for the position you wantin the work you like best, } whatever it may be. You can get it at home, in } spare time, through the International Correspond- ence Schools. It is the business of the I. C.S.to prepare men for better positions at better pay. They have been doing it for28 | years They have helped two million other men and women. They are training over 100.000 now. And they are ready and anxious to help you ii Here is all we ask—without cost, without obligating | yourself in any way, simply mark and mail this coupon, ee ee ee ee eee TEAR OU T HER ee eee eee eee ee INTERNATIONAL CORRESPONDENCE SCHOC2S BOX 5651-B SCRANTON, PA. Explain, without obligating me, how I can qualify for the position, or in the subject, before which I mark X. JELECTRICAL ENGINEER )Electric Lighting and Railways Electric Wiring } Telegraph Engineer } Telephone Work MECHANIOAL ENGINEER Mechanical Draftsman Machine Shop Practice loolmaker }Gas Engine Operating CIVIL ENGINEER BOOKKEEPER Surveying and Mapping | Stenographer and Typist )MINE FOREMAN OR ENGINEER |) Cert. Public Accountant STATIONARY ENGINEER _) TRAFFIC MANAGER |}Marine Engineer }Railway Accountant Ship Draftsman |) Commercial Law J)ARCHITECT _ GOOD ENGLISH Contractor and Builder |) Teacher ) Architectural Draftsman _}| Common School Subjects )Concrete Builder J CIVIL SERVICE Structural Engineer Railway Mail Clerk PLUMBING AND HEATING _ AUTOMOBILE OPERATING Sheet Metal Worker ante Repairing (JSALESMANSHIP |) ADVERTISING ™ Window Trimmer [Show Card Writer _ Sign Painter “Railroad Trainman ‘wile LUSTRATING | Cartooning BUSINESS MANAGEMENT Private Secretary Textile Overseer or Supt. Navigation _) Spanish } CHEMIST AGRICULTURE ) French }] Mathematics C) Poultry Raising Italian Name _« . _ Present Occupatior = Street and No City__ State =e — Canadians may send thie coupon to 7-25 16 Jaternatonail Correspondence Schools, Montreal, Canada Please Mention Popular Mechanics POPULAR MECHANICS ADVERTISING SECTION “THE RALPH C. 501 Cunard Building wy. AND OTHER TP. e War! i gre ties for those who know ‘ieee, French or Italiar her language doubles ir mmer i€ repare now to better your p« the r Ss Brust I guage y school or college and make it of pract yourself t rend § reign books and papers mh tian rn qu kly and easily, at home pare mon LANGUAGE ‘PHONE METHOD And Rosenthal’s Method of Practical Linguist ry This is the natural way t learn ve hear the living v« protessor pronounce h word and phrase He speaks a “saaieigitaniaiie, Gee ai nutes or t r ta time It isa ple nating study; no tedious rules or men x It is not exy v family and friends can use it. You simply practice d g SI ments, and in a Surprising! hort time you speak, read, write understand a new language Our records fit ali talki ing machines. Write for free *'La guage Treatise,’’ pa wlars of Trial Offer. Easy payments THE LANGUAGE PHONE METHOD, 261 Hess Building, 354 Fourth Av., N.Y MUSIC TAUGHT FREE IN YOUR OWN You can mM Trae Uke thu qudly HOME Piano, Organ, Violin, Mandolin, Guitar, Banjo, ete, Seginners or advanced players. One lesson~weekly. iit ee make ev ylain. Only expense about 2c per day to cover cost f pos tage and m — Write for FREE booklet which explains everything in Ful l AMERICAN SCHOOL OF MUSIC. 51 Lakeside Building, CHICAGO WISCONSIN SCHOOL OF WATCH REPAIRIN 166 Mason St., MILWAUKEE, WIS . UBLE YOUR INCOME \, (4, Ay RENEWING OLD TIRES ['S the biggest mone r Demand for renaived tire t constantly. There never wasa time to start in this business. We you how to do expert work and ‘ you best way to operate busine I pairmen make $30 to $50 a wee r repair shops make $100 to $500 WE TRAIN YOU B BY ‘MAIL ensive and practical. We guarantee | xpert tire ito be ane epairman in three rt oe that you can repair fabric tire “ d tire big “aeectoeneoe truck tires, ar | Course has er ement of large tire * We show u how and where to get the ¢ ' ment for doing the work Write today f ; f and outline of our ne : ' Hovey ran ‘School of Tire Repairin; 312 Second National Building AKRON, OH!

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—————— eel POPULAR MECHANICS ADVERTISING SECTION = oa ~~ NATIONAL RAD | Instruments to Every Student In addition to 5 text books, one hand book, 16 special lessons and 18 personal examina- tions, we send you, while taking our course, the fine natrometer outfit here pictured. This set is yours to keep when you finish the course. By Mail- In TenWeeks Learn Wireless Telegraphy and Telephony at Home in Few Weeks Easy to Learn Wireless by Our Method yur practical method of home instruction and with the Jur improved natrometer outfit it is easy for any in- nt person to learn wireless and become an efficient itor ina few short weeks. You get actual practice in ng and receiving messages while taking our course by Every step is made clear and you will make rapid »ss from the start. We now have hundreds of students ighout the world, Our location in the nation's capital, v e we operate two large local schools, together with the ng of our officers and their wide acquaintance among nment officials connected with wireless activities, is ina position to give our students the best instruc- )tainable and to be of the utmost help in assisting n to secure good paying positions. Membership in N. R. I. Relay League 1 enrollment every student in the National Radio In- eis presented with a handsome blue and gold pin, sig- ng his official membership in the N. R. L. Relay League, with a rapidly growing membership throughout the world. Extra Course in Radio Telephony in addition to our complete course in modern radio teleg- raphy, every student is given our complete course in Modern Radio Telephony. This course combines ten special lessons and ten personal examinations. This com- bined telegraphy and telephony course enables our students to secure positions requiring knowledge of both radio teleg- raphy and modern radio telephony. Send This Coupon for Free Book containing particulars of our special summer offer to students enrolling now. National Radio Institute America’s First and Foremost (Est. 1914) Dept. 221, 14th & U Sts., N.W., Washington, D. C. TRELESS Calls coming in steadily for National Radio In- stitute graduates from all parts of the country. Four concerns guarantee to take all the oper- ators we can furnish. Commercial radio has arrived and many at- tractive positions are now open in the com- mercial land radio service, merchant marine, railroads, radio supply factories, lake and ocean steamship companies, tele- graph companies, aerial mail service, and radio compass stations. We are now receiving requests for more National Radio Institute graduates than we can furnish. Salaries Up to $15,000 a Year Our graduates start work as Senior Operators at $125 a month, which with all living expenses paid averages approximately $225 a month to start. Advancement is rapid to high positions with bigger pay, as follows: Radio Aids, $6 to $15 a day; Aerial Mail Service, $1,500 to $2,400 a year and 10% bonus; Radio Inspectors, $1,200 to $3,500 a year; Radio Engineers, $2,500 to $15,000 a year. Our Graduates are guaranteed positions upon securing their official license after taking our course. You can learn wire- less the National Radio Institute way in a few weeks by mail, right in your own home. Many of our students secure positions before com- pleting the course, because itis based on actual practice and teaches what is needed to make a big success of wireless work. Travel If You Want To If you want to travel and see the world, go to foreign countries and increase your knowledge of world affairs, wireless offers you the chance of a life time. However, you are not obliged to travel, but may secure a permanent position at one of the many land offices, railroads, or telegraph companies near your home, if preferred. g National Radio Institute, « Dept. 221, 14th & U Sts., N. W., Washington, D. C. a Send me your Free Book, “‘Wireless the Opportunity of Today.” ’ Tell me about your famous Home Study Course in Wireless ay Telegraphy and Telephon your Post Graduate Course, Men bership inthe NR. L. Relay League and your Special! Wireless @ Instruments Offer a 7 RARER ccccccccccce sSebeesbeensdesewencnsgedeusnneetibhoben » . 3 BRBMB es ccvccccccccesecccceccnncseccnseccocccccccecccossesenccecoscss = s DEBT ccc cocccccccccccccces cocccccccccccc co EAE Bec cccccccccccsoccoccccece Please Mention Popular Mechanics

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72 POPULAR MECHANICS ADVERTISING SECTION ame) ee: eee LULL a 2 -. . ~~ — ° r 7 Thousands of Trained Aviation Mechanics Needed! Thousands of ‘Trained Aviation Mechanics needed for Splendid new positions opening up everywhere in this amazing new field. Trained men are needed for the big-paying jobs. From the new Airplane Industry comes the call for men trained men—and this is only the beginning. Already Airplane mail routes S and passenger carrying service are in operation Men in this great industry are making enormous salaries, but thousands more are heeded right now Not in a hundred years has any field of ende wr held out such wonderful opportunities as are offered to you tods ay in this great new profession. Prepare yourself in a few short months to double or treble your present salary as an Aoronautical instructor Airplane Mechanicien Acronautical Engineer Airplane inspector Acronautical Contractor Airplane Satesman Airplane Repairman Airplane Assombier Airplane Builder pee ene Lee ~y at hom ina fe toed tl rte ethan as tl lors nyour spare rt months it of airplane man cturers, aeronautical ex] rs i leading aero ¢’ ube Every Lesson, Lecture rint ar id Bulletin Is self-explanatory You can't rn » book study; no schot ling ——— Le tten in @asy- to-understand iical las os FREE Coupon Write quict r our Sr 1 ivertising Offera Vv t k Oppo mt Air ! Sen n i dt e full 5 " yne-half the regu price o t ( mpilete Course by act ‘ rompti We can enroll « few mo tudents on this S; a t Offer. Send the Coupon now. AMERICAN SCHOOL OF AVIATION 431 So. Dearborn St., Dept. 119A, CHICAGO, ILL. AMERICAN SCHOOL OF AVIATION, 431 S. Dearborn St., Dept. 119A, Chicago, Il Without any cbligations on my part, you may send me your Fre also informat at ir Comy e Course » Practice ihepanaan and your Spe dver gy offer off HAWAIIAN un MUSIC THE r Mn, uy, RAGE E CAN YOU PLAY? ARE YOU POPUL LAR? Let this famous player ictor. Learn to dies on the Hawa ore exquisit Draw to yourse rr s of friends—know the « ‘ F PPRee a genu given awa ‘ e J. Clai ke new and woncertully easy system « instroctior by mail mall cost—great results! Write Mr. Clarke personally today HAWAIIAN INSTITUTE OF MUSIC 1400 Broadway Dept.2-F New York, N.Y. | LEARN WATCH REPAIRING Be a watchmaker—you can learn this profitable trade correspondence in a few weeks in your own home DeSeims Chart System. After you complete the course will know a watch from A to Z You will know the atter is and how to repair one. When y gta you will be a practical watchmaker and repairer and competent to fill any positior Positions for our Traduate Ask 'or our Free Book. {tt explains our system and terms. THE DeSELMS Wate H SCHOOL 23 Perry Street ATTICA, INDIANA SHORTHAND IN ONE MONTH ; BOYD SYSTEM — Based on Syllables mast ws tweek. Typewr “ aioe ‘Send today for Catalog and Money-Back Gu CHICAGO HOME sTUuDY SCHOOLS, 504 Reaper Block, Chicago, |! Learn Autos and Tractors Pi en) r Wonderful opportunities tantly of trained 1 you ~ Boece a! to start business or 1 e good n tor expert, driver, shop fore 5,000 Graduates adilitene good. Catalog Free Cleveland —— Schoo), 181 at E. = St., Cleveland, 0 nple work with n lis structions. SINCLAII tx, Dept. 6, Ocean Park, arn Samer BECOME A PROFESSIONAL PHOTOGRAPH ER Eig opt rt ties NOW. Q fy fou thi in« atine prof Lhree m ieee urse covers all br ches Deale Motion Picture —Commercial— Portraiture PRACTICAI INSTRUC TION; modern e quipenent Day or evening classes; easy termes The 8 Lec ized Superiority. Call or write for complete cata! N N. Y. INSTITUTE OF PHOTOGRAPHY 141 W. 36th St., N. Y. 505 State St., Brook!

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POPULAR MECHANICS ADVERTISING SECT'‘ON 7%

F i » ille Students d Graduates i employed in the ex« ts of practically ali th business houses and ganizations in the United

pr ” 3 from For i tance niaR.R Telegraph e¢ nv Corporat ‘ €& Ohio R.f 9

i iM j t d& ¢ / 1 Oil Company the nu r fir empic ng t r jents or g i t MW I tr ( / , Ha Accounting given by the LaSalle Exter on University Learn Higher Accounting By Mail Our staff of experts in the Science of Accounting will give you their direct personal instruction by mail, guiding you step by step until you have mastered this paying profession. You will study text books, lectures and accounting methods prepared by authoriti« men who are actually em} ed or retained as expert advisers by leading industries. The underlying principles a the most modern methods of Business Ana sand Organization, and the Principles of Accounting, Audit. ing, Commercial Law and $ ntific Manage- ment all made clear. You will be given special preparation for the C. P. A. examinations and made ready to command a higher salary or to

Easy Terms No large fee n to pay dowr ruct cor enter business as a Consulting Accountant. mms inet fere ent You can getall this in your spare time while aa af tie : vas © . you hold your present position. How better saat A pre ent abo Send t poBiccnin could you use your hours of leisure below for full ed information ; Mail The Coupon Today Make the knowledge of these LaSalle expert At least ; yours,

eend for information about this course ich has helped so mar men to rise quickly to positions of greater profit and prestige d which you can easily master by home study, No n ter where your be or what 1 t iY I l ille | t t / ean put you on the road to g i I be pr ed t ‘ < t i graduates. The ormation v M A t } t % n , P " ——- proficient in High« 4 nting and w Vv “ t l It w I out the possibility t tare Ww oT tot r r r t g organizatior We will also send valualt book i Years’ Pron on in ¢ M vw meee ee PL ASALLE EXTENSION UNIVERSITY) “The Largest Business Dept. 664-H Training Institution in the World’’ Chicago, Illinois

Without cost or obligat on my part, please send me part regarding r Home St ( r Ira gin ing and r ( iit w Ser ‘ " of va book for ambitious men Ten Yea i'r tion In ¢

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74 POPULAR MECHANICS ADVERTISING SECTION Train Here to Earn FREE COUPON 7-$1800—$5000 a Year- the assurance of a successful future are yours whe: starts you to enroll in the BIGGER PAY RANSOMERIAN BUSINESS SCHOOL Our co-operative scholarship plan pute this master tr easily within your reach. Widest curriculum and most prehensive work offered. Courses include Business Ad istration, Higher Accountancy. Stenography, Bookke« Banking and Finance, Advertising, Salesemanship, F) Elocution and Oratory, Secretarial, Teacher Training. |} fessional Penmanship, Business Philosophy and Internat Merchandising. We Will See You Tareugh No matter where you live or what your education and circumsta Ransomerian Training is your opportunity We obtain employment living expenses, if desired, ona guard your business and social + Reservation for 1,000 men and women for big fall term now being r under co- operative lan. Ask for Ransomerian College Year Book a particulars. Write TODAY. A postal will do. g Pee > glpemmnasae A a PPL. Machine Shop t — ibrary tells you how ; ° to qualify for the higher A’! Do You Like positions paying $50 To Use Tools? per week and over eo Tarn Thies Valuable Talent 22) Into Earning Power—Nou There is an urgent demand at g salaries for men who have a na ya a>, liking for mechanical work. Ws more calls than we can fill. Hu: of beginners are in three months’ time earning fro to $125 a week. You can earn while you learn. Now is the ine to get ready Mechanical! Dentistry is a pleasant and dignified profess Never before in history has there only ordinary educ ation required; very little book study been such a demand for capable machine ee Sa Oe ee ee le G h {ree catalog No. 22. shop workers. Don’t take our word for this. The nOOLS eo, evidence is seen on every side. BODEE “*ecnanicat DENTISTRY Average workers are drawing up to NEW YORK PHILADELPHIA BROOKLYN $50 per week, while men who are equipping wees oe WS Waslieinat Sty, te nacetensiti themselves with a technical knowledge are earning much more. $100 per week is not unusual for the specialist. Eight nationally known authors, [ FARN WATCH iw AGh G all practical men, wrote the Machine Shop ; Library. These men were assisted in completing these records of actual practice by over two hundred experts. Engraving and Jewelry Repairing. Practical specialists charge of allinstruction. Students trained for the best 8000 pages of plainly stated facts, and 3300 ing positions. Earn while learning. Our schoo) is er ? and recommended by leading jewelers. A few mont! illustrations, forming a set of books that makes promo- make you an expert. Positions secured for graduates. Der tion sure. for watchmakers greater than the supply. Write for free ca Sent without de pos = CHICAGO SCHOOL OF WATCHMAKING, Dept. 20, State-Lake Bldg., CHICAGO Just return the coupon || gm SHORTHAND Simplilic Learn Easily at Home Practical K. I. Shorthand ; quickly lea i You attain speed easily. Great saving i ind expense. Guarantee and 30 da given Home study. Many endorser Used in Government service, in corpor ac choo! ls, professional and business offic ------Free Examination Coupons=1 | ro. a taste 0 KING INSTITUTE Fill out the coupon below right now. Examination of these nine volumes is absolutely free. After seeing the books you will then know why they are accepted as the standard in America, and why they are helping thousands of men fill the big positions. ” like. I am taking it down’ McGraw-Hill Book Co., Inc., 239 W. 39th St, New York in K. 1. Shorthand.”” EF-187, Station F, New York. N. ’ GENTLEMEN : —I am interested in your Machine Shop a Library You may send me the nine volumes, charges 6c ° 99 paid. for my inspection. If satisfactory, I will send $2 in Be a Movie ten days and $3 per month until I have paid the price of the books, $20. If the books are not what I want, I will write you for shipping instractions. Photographer B PRGA isc cciccivecvessssssiere Se a Te — Earn $50 to $200 weekly . Fascinating work taking you to DIR DOIG ones sicdccicnsiaccrccscsvescvevesesess ; all parts of the world : Se IIE cs ccctaduanshotechasesssranenssecbscesinnsenss . : E. BRUNEL COLLEGE . : TIRE. ins kbdcccciivctecsnvcastevecrcesceczses H OF PHOTOGRAPHY 2 7 H ony other schoo : BS DIED 0ccdcccscecceecsss pabdtnedbewsseesdsaersesens ~~ 1269 Broadway, N. ¥. H I Te ae TT P.M.6-20 : Day or night classes. 3 months’ course complete tnstruction fn Generat otography ani Motion Pictures operating etand- ard cameras xpert instructors. Installments taken. mite Brunel operates 20 studios in New York, Chicago, Boston, Phila- deiphia, Detroit, Pittsburgh. Call or send today forBooklet P. Please Mention Popular Mechanics

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POPULAR MECHANICS ADVERTISING SECTION 75 “IF I ONLY HAD Another Chance” F TIONLY HAD ANOTHER CHANCE,”’ said Richard A. Oldham, 58 years old—a telegraph operator struggling with family responsi bilities. He got it. Haywood’s Tire Surgery gave him that chance. He earned $2200.00 in four months. Most people believe that ‘‘Opportunity knocks but once’’ at a man’s door. We believe it knocks as often as a man will hear it. Here is YOUR OPPORTUNITY 30,090,000 automobile tires wearing down every day. Cuts, gashes, tears, bruises, broken fabrics, every kind ofan accident that can happen to any tire, inside or out, is taking place. All can be repaired and saved for long service — 4000 to 5000 more miles. Tires must not be junked—they will not be junked. The chance for making money is simply wonderful TrRESBE, The vocation which earned Mr. N. E. Gibbard, of Charlotte, Mich., the gros#sum of $43,000 in the first nine months of 1919; and which eved Alex Etzrode of Scranton, Pa., of punching a time clock, and made him a BUSINESS MAN with a first year gross earning of $30,000. There Are Four Thousand Haywood Tire Surgery Stations in the United States There must be hundreds and hundreds more. What An Inspira tion To The Man Who Would Learn a Profession that would insure him a positior Anywhere He Cared to Go! What a Field of Endeavor for the man who is eager to own a paying business of his own! Haywood’s Tire Surgery is taught in a

“6

RICHARD A. ULDHAM

two weeks’ course of practical instruction and demonstration at tl Hayw ood Tire & Equipment Company, Indianapolis, OR THE COMPLETE COURSE IS rHOROUGHLY TAUGHT BY MAIL. Without the ke t knowledge of tires you ear learn this business. When the course is con plete a diploma is given which marks the holder as a FREE Book master of the craft—Thoroly fitted to establis} <Ti Re SURGERY STATION

business which is an actual National Service. Bot}

gives all details. Tells all , 1 bout tires and how to young and old men~with and without a finishe repair them. It’s really education, have madegood under Haywood ruidar if that every ambitious man | @ Mam has grit and determination he is Bound to Succeed. i getnes Hire tre Haywood Tire & Equipment Company s . 744 Capitol Avenue Indianapolis, Ind.

ae “2 MY PROPOSITIO ’ Bring me a mbit s he-man wit! GOOD, COMMON SENSE BRAIN I lreturn him a BUSI? SS MAN wit a Most Wor erful Pr geeescauezeas fession HAYWOOD TIRE & EQUIPMENT COMPANY

: With rf 744 Capito! Avenue, indianapolis, ind Which to Su e I ceed, : an M. Haywood + President @ *

~ ‘lease Mention Popul Vechanics

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76 L, Reading of has brought swift, sure success to thousands of men, who without the benefit of this specialized knowledge, would probably have never progressed beyond ordinary achieve- ment. The law-trained man has an enormous advantage. Whether as a practicing lawyer, or as an executive ambitious to increase his influence in business, a practical working knowledge of LAW is a short-cut to personal power. is a factor, of prime importance in big busines Ve need men trained in the Law” is 3 the word sent out by great busi- ness organizations everywhere. Today's conditions involving a mass of statutes, decisions, rulings— changes from old precedents—new interpretations of commer- cial law—all make the legal expert of vital importance—a positive necessity in every large business house, Neyer before were prospects so bright for men who can ansWer the puzzling legal questions which come up daily. Important positions carrying executive responsibilities with large salaries are always seeking legal experts. training often leads to a big executive position, because it enables a man to dictate policies that are legally sound— to make quick, correct decisions on in- tricate points, puzzling to the untrained man. Every large corporation has a well equipped legal department and smaller concerns have their retained legal advisers. Many presidents of corporations (for example: Pullman Co., American Sugar Refining Co., National Biscuit Co., etc.,) are law trained men. is a stepping stone to personal prestige and social standing. The successful practicing lawyer, or law-equipped busi- ness man, has open tohim a prosperous career in a dignified, influential profession. No other profes- Sion Opens up greater opportunities for rapid and profitable advancement. And never before has it been so easy to acquire a thoro law training of university grade as now. University Course By Mail The LaSalle Extension University’s large faculty of legal experts will train you thoroly in every phase of law. You will get instruction in the same subjects taught at leading resident universities. You will have text books, lectures, quizzes, illus- trative cases, examinations, etc., prepared by leading law pro- fessors. You will be directed at every step, with every point clearly explained. Graduate with degree of LL. I All this training can be had at hoine—in spare time only. No need to leave your present pvsition. Membership also includes general consulting privileges with all departments of the university—a service not ofte red by any other institution. Convenient Tuition Terms The LaSalle course and this direct personal instruction and business consulting service is offered at a cost which puts it easily within reach of even the man of small income. Decide now to be a law-trained man. Get above the ranks where y is small and competition intense—increase your income y increasing your mental capacities. Write Just mail the coupon and we will send full infor- mation about the LaSalle Home Study Course in Law and our Free Consulting Service. We will also send you a copy of the famous book, “Ten Years’ Promotion in One”’— which tells how men with the aid of ained, in one year, promotion which men without this training ave not realized in ten. Send for your copy now. ome owe mew ee ee ee LASALLE EXTENSION UNIVERSITY The Largest Business Training Institution in the World Dept. 664-L CHICAGO, ILLINOIS Please send complete information on your University training in Law and your Consulting Service free to LaSalle students, Also your book, “Ten Years’ Promotion in me,’’ This without obligation to me, LaSalle training have EE ae eee eee ee oon sal Present position. Address............ oe ceecceces ceccececececsoecos Please Mention Popular Mechanics POPULAR MECHANICS ADVERTISING SECTION Learn Photography] Good-paying positions in the best studios of the co await men and women who prepare themselves now 25 years we have succe ssfully taught Photography, Photo- -Engraving and Three-Color Work | ¥ graduat to $100 a week. We assist them to « } el positions. 4 is the time to fit yourself for an ady position at better pay. Terms easy; living inexps nsive. Lar and best school of its kind. Write for catalog éoday ILLINOIS COLLEGE OF PHOTOGRAPHY Box P, 999 Wabash Ave. Effingham, Illinois Mining Engineering rc For Your Profession ~ A wide and profitable field, not overcrowded, The Michigan College of Mines (established 1886) off comprehensive four year course which can be comple in three calendar years. Its breadth provides foundat for expert specialization in that field of engineering w! most appeals to the student. Theoretical work accom pamnit with practical experience. College is located in center one of the world’s greatest copper mining districts. C relations constantly maintained with mines, mills, sme ers, electrolytic and power plants which are practical part of the college equipment and a factor of enorn value in instruction. Managers of large operations r¢ larly lecture to classes. Region affords unusual opport nities for geological study. Nine Buildings, Advar Methods. Vigorous Athletics, Bowling, Billiards, Tobos ganing. “‘M. C. M. Men M: ike Good.” For Descript book, address 260 College Ave., Houghton, Mich. MICHIGAN COLLEGE OF MINES men with training EL RICA demand. For more quarter of a centur achool has been training men of ambition and ~~ for the electrical industries. Condensed course in en: oi les 2 ENGINEERING =: od and promotions. Theoretical and Practical Electric ity. M. ath ics, Steam and Gas Engines, Mechanical Drawing. Students cor dynamos, install wiring and test electrical machinery IN ONE YEAR Course with diploma,com plete equipped Thoroughly fireproof dormitofi« ing hall, laboratories, shops Over 3000 men |! Write for catalog. 28th yearopens Sept. 2 BLISS ELECTRICAL SCHOOL 104 Takoma Avenue, WASHINCTON, D. HOME STUDY (28th Year) Courses in English, Spanish, Mathematics, Chemistry, Drawing, Economics, Educa- tion, and in 35 other subjects i] are given by correspondence. Eh 1, |} Begin anytime. Address ik Ve Che University of Chicago Division 4, Chicago, II! | LEARN WATCHMAKING and become independent Good-paying positions secured Kasy to learn. Send for FREE CATALOG a) ST. LOUIS WATCHMAKING SCHOOL, Dept. 5. ST. LOUIS, mo LEary LANGUAGES 8’ LISTENING ON YOUR OWN PHONOGRAPH at home with Disc Cortinaphone Ta: guage Records. Write to us for FRE! booklet today; easy payment plan Endorsed by leading universities CORTINA ACADEMY OF LANGUAGES Suite 676, 12 Fast 46th Street. New York Spanish- french-English-ltalian-German

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POPULAR MECHANICS ADVERTISING SECTION ~

Automobile $ Automobile $ Expert $2 Engineer [ : $36.00.) Along with the set goes a ve ting me hip in erican Tech Societ (| ——— iwn when t re é DON'T = MONEY NOW! Don't take t See » the books without cost H a chance f ou to get are sj t t Don't wast ute i end the « por Put the coupo n in the anni saten Send no money — just the coupon! AMERICAN TECHNICAL SOCIETY, Dept. A-19A, Chicago, Ill FREE Examination Coupon

American Technical Society, Dept. A-19A, Chicago | © send t he ¢ me set Automol Fing u d me areceipt ‘ ‘ ft | « Membershis | the t te i l Name Addrese City State Reference mee eee ees ee Resa ty

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POPULAR MECHANICS Here's a hot one! ever got for 25c. That's why we make this The best magazine ever printed for Ford owners. 200 pages each month. 108 Montgomery Bldg. ADVERTISING SECTION See What You Get for 25c The biggest value a Ford fan Listen! We want you to know Ford Owner Maga- zine. If you read one copy you'll be our friend for life. BIG FREE OFFER Send us 25c for a three month subscription and we will also send you postage prepaid a copy of our valuable repair book---FORD CARE anp HOME REPAIRS. FORDOWNER MAGAZINE TPIT Our repair book will save you many a dollar and help you to MILWAUKEE, WIS. make your own adjustments stented at EARNENGINEERING Expert electrical engineers are being paid fabulous sal- aries—thousands needed today. We give you personal and thorouch training — practical, technical courses 3 months to 2 years under expert engineers in electricity, steam, gas, auto, armature wiading, drafting, etc. Extensive laboratory and shop e..uipment. Not a trade school. Training is c ondensed—if your time is limited come to the Finlay Engia-ering College — only one of its kind in the West. Day and night sessions—enroll any time. Write for FREE Catalog—a post card will do. Finlay Engineering College i204 ne'er e"snee Play the Hawaiian Guitar Just Like the Hawaiians! Our method of teaching is so simple, plain and easy that you begin on a piece with your first lesson. In half an hour you can play it! We have reduced the necessary motions you learn to only four—and you ac- quire these in a few minutes. Then it is only. a matter of prac- tice to acquire the weird, fascin- ating tremolos, staccatos, slurs and other effects that make this instrument so delightful. Your tuition fee includes a beautiful Hawaiian Guitar, all the necessary picks and steel bar and 52 complete lessons and pieces of music. Send Coupon NOW € GET \ PARTICULARS FREE \ PS SSSSSSSSSS SSS SESS SESE ESSE SSE eee ee eee First Hawaiian Conservatory of Music, Inc. 233 Broadway, New York City I am interested in the HAWAIIAN GUITAR. Please send complete information, special price offer, etc., etc sesessess, PE siletesbrbddcvecdetersdchecicctnssenasodnunenenensesese . DF BRI csc cscccsvscecccccewesennsarsocvecasseusenees . s s 5 Pe tnnes. cadsdniksensesitamemmiainaeiiaien eeesccee coook. M, s Write name and address clearly. bescccccccecccuccecesess Saecaeeetaaaaas |A MODERN HERCULES A New Star Has Dawned in the Athletic World The experts say that Arthur L. H modern methods ABSOLUTELY (¢ NOT BE IMPROVED UPON. Mr. Hy« hos made a close scientiticstudy of t! man body from the athletic standy and has discovered a method of mak body physically perfect. He does not rt m one muscle bigto the neglect of the His pupils are uniformly and power 3 built along the plans that mean pé« health, virility and streneth comb with a well proportioned bods He just published anew book called“*Physical Perfection” which fully expla 2 methods, terms, etc A copy will be : i} to your address for 10 cents to « r =) of wrapping, postace, et« Send for copy today—do not put it off one m es © “%j “4 ARTHUR HYSON, Dept. 203, 164 Fulton St., NEW YORK % _— Send for your FREE copy of “MIND“o MEMORY’ which fully describes Pelmanism—a simple course of study which will strengthen your mental powers ur mind force which will gain success for you in your chosen Over 500,000 students, THE PELMAN INSTITUTE OF AMERICA 505 Fifth Avenue, New York, N. ¥ Suite 370 Learn Watchwork, Jewelrywork and Engraving. A fine trade command ng 48 . lary, and your services are in demand. Address HOROLOGICAL, Dept. P, Bradley Ins Peoria, Lil., for our latest catalog. 7 Learn How to WRESTLE Yes, learntoe Lecome an expert wrestler right in your own home. by — > from the greacest wrestlers the hy 3 ever known. Be an athiete, be strong, be — a Learn how to throw and handle big men with a oursett. Ali taught in our course of lessons, b= = 5 Eucdsede of charts and actea! photographs by Farmer Burns and Frank Gotch ‘armer Burns. i the World’s C -~- gS wilt now teach you Scientific Wrestling — i ~Selt Oetense. © book ely . tied” ov iendid book on wrestling and physica! culture Write Farmer Burns School of Wrestling A119 Ramge Bidg., Omaba

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POPULAR MECHANICS ADVERTISING SECTION 7y

“Here’s Where We Got Our Start” Look, Nell—this coupon! Remember the night you urged me send it in to Scranton? Then how happy we were when I came home with the news of my first promotion? We owe it all, Nell, |

° ss i my place as Manager, our home, our comforts—to this coupon. Thousands upon thousands of men now know the joy of happy, prosperous homes } because they let the International Correspondence Schools prepare them in their spare time for bigger work. You will find them in city, town and country—in office, factory, shop, store, mine and mill, and on farms and railroads. “There are clerks who became Advertising Managers, Salesmen and Executives; carpenters who became Architects and Contractors; mechanics who became Engineers and Electrical Experts; men and boys wt 7 r + at | wno ee trom nothing al all to splendid | Piteortetee Tease our HERS _—S ee eS oe oe esponsibdle positions. of ; INTERNATIONAL CORRESPONDENCE SCHOOLS we ore ' . V BOX 5646-B SCRANTON, PA. | he rS Bee ou h Men as Jesse ( ms \ incent, Explain, without obligating me, how I can qualify for the position who advanced from toolmaker’s apprentice or in the subject, before which I mark X._ ' , , ary : ELEOTRIOAL ENGINEER C)SALESMANSHIE to \ ice President of Engineering ot the LJ Electric Ligh og and Railweys LJ ADVERTISING ) ’ : ° [J Electric Wiring | Window Trimmer Packard Motor Car C ompany. Such men "Telegraph Engineer Show Card Writer . " a Telephone W ork _. Sign Painter as H. E. Gardner, who won through I. C. S. MEOHANICAL ENGINEER Railroad Trainman = } - Mechanical Draftsmar | ILLUSTRATING spare time study the training that equipped Machine Shop Practice = Cartooning 1 . : ) Toolmaker _) BUSINESS MANAGEMENT * him to build the great Equitable Building. Gas Engine Operating = Private Secretary . Z a JOLVIL ENGINEER BOOKKEEPER I hese are but examples. ] hey have proved Surveying and Mapping (_) Stenographer and Typist 7 L MINE FOREMAN OR EXGINEER bw « ert. Public Accountant what men with ambition can do. STATIONARY ENGINEER TRAFFIC MANAGER : [)Merine Engineer Railway Accountant N ] PShip Draftsman |) Commercial Law Nearly two million men and women in MS ARCHITECT “GOOD ENGLISH +} ¢ FR ] : } Contractor and Builder |) Teacher ne la oe 8 years nave ad\ am ed themselves } Architectural Draftsmen ~) Common School Subjects ’ Cc te Builder aw CIVIL SERVICE In position and salary through l. ee. help. a el Ragincer Lj) Railway Mail « poate = “PLU 3 ING UTOMORILE OPERA a Over 100,000 are study ing right now. You See ctocel Worker sete aepetving : ‘e ; : extile Overseer or Supt Navigation ) Spanish can join them and get in line for promotion. Fk + eee AGRICULTURE | aoanell oe i Mathematics [) Poultry Raising Itallan | Ihe first step to success in the . m - H . SO enn ee way Is to choose your career from this list Present Occupatior and mark and mail this coupon here and now. Seneet and N« City State

Canadians may send this eapondence bo Jaternatonal Corr coupon to T-20-"@ hools, Muntreal, Canada

Page 238

RO POPULAR MECHANICS ADVERTISING SECTION Red Seal Continental Motor | . 34x4 Tires—Rear Non-skid 120 Inch Wheelbase Willard Batteries US e Uxe Full-floating Rear Axle Genuine Leather Upholstery Borg & Beck Clutch Covert Transmission Six Cylinder WN Fu

Dyneto Electric Starting and Lighting

edi: en Se

— nental messages, ut any speed, just as an expert operator would. Adopted by U. S. Government, and leading Universities, Colleges and Telegraph Schools. 3 styles. Catalog free. OMNIGRAPH MFG. CO., 39D Cortlandt Street, NEW YORK ae ‘STAMMER | >, 4 od SS : If you stammer attend no stammering school till you get my big new FR guides your hand; corrects your writing in book and special rate. Largest and most successful echool in the w

Wonderful, new device,

fewdays. Bigimprovement in three hours. No failures Complete ing all forms of defective speech by advanced natural method. Writ — FREE. “ rite ©. J. Ozment, Dept. 34, St. Louisa. Mo North-Western School for Stammerers, Inc., » >; ; Grand Ave., Milwaukee, Wis paotitiman WMUneteneen TO MUO LO DLO UMD DUDE Dug 7

WEBSTER NEW Wistert your questions be the prominin INTERNATIONAL ihe location of Zeebruage, the, meaning »f c »a an »t ' DICTIONARY [i Bd Authority ‘ ot tory ane caller oe oneun G.&C.MERRIAM CO., SPRINGFIELD, MASS. **'** 2;2, con" PArer LATA TTTTDA ARTY ETT MATTIE Waa be ned = ian a ae ee anaes ty 2700 Pases E a end me spec: } + men pages and {name ocnccocccesccnencccscescececcncesceccoccceseSmnasBinesssercccescasececseoss 6000 Illustrat FREE POCKET MAPS\ADDRESS iment orsnenenensdtniitinasanidaninmanats PTVANNNNANANYUUUNNLLAAAN Please Mention paeeretn Mechanics

me nt eee pren aneee

Page 239

POPULAR MECHANICS ADVERTISING SECTION 81 | TheB est, Mos + Profi table Vacation For You is The Summer Term — in the Big Million Dollar Sweeney Auto, Tractor and Aviation School On the big Sweene “Tractor Farm School this summer and tn congenial employment at salaries 0 per year. You can't afford to miss is of vital importance to you. to the Sweeney ks fit yourself fur $1,200 to $5, This proposition Summer School is more profitable to you be- there are students in school, but the quipment and teachers as in winter. You ‘t more practical experience and personal tion; 8 weeks will fit you to go in and fill one big openings in the motor industry. less vuundings in Kansas City are far more pleasing i er than in winter: you have the privileges of actual tra perience on the big sweeney f irm your ir 1Virie ir ct , you to the beautiful parks, the scer jrives and wonderful ird Entertainment of every nature is awaiting you, summer show we, baseball, dancing, and all where the morals of the student irded You get the exhilarating, inspiring effects of the be st as nen of talent and brain the Big Millior men who have “Made Good The are your Dollar School _ THE SWEENEY CHO EPR ee eg ny ence or an ed tition, because w use tools, not books; you are taught the largest of its kind and our students go out with a thorough by practical men to do the wor O led yr ~ motors of every kind. Stationary, Tractor, Airplane ind with ur own hands, how to repair 0 Motor ¥ mu be » the Wonderful Liberty Motor, Sturtevant, Hall in) engine or part and how to act tt and Hispar 1iza. You will do actual work on this vast array of illy make parts for any piece f nes. Thatis w ne Sweeney students “Make Good machiner ey students are ready to step right out and operate and repair al! Will you *“‘Make Good Answer tractors and t ks and by finishing before the middle of August his quest a the ya nt ion to hil the big demand at this season for high paid farn t ( ' this let chanics ‘ow is the time to start, break loose from whatever you are a a“ ' od as rand come to the Sweeney School for 8 weeks: when you have finished ingements for 0 nd start to work the r t8 weeks will pay for all the time you have lost and yo | have the knowledge that is necessary to demand big money. a Don't wait a day: something may come up to hinder pam, San say right 2 : : ne to make eon ¢ “ " or . t. o “ oa tr ad can * M ake Gan Soo pet NE Emory J. Sweeney, President Fill out icone and mail today a EMORY J. SWEENEY, President - 306 Sweeney Blde KANSAS CITY, MO a LEARN A TRADE —f 2300s Name SCHOOL OF AUTO-TRACTOR AVIATION 306 SWEENEY BLDG. KANSAS CITY, MO i

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82 POPULAR MECHANICS ADVERTISING SECTION ow to Soften Your Beard Yet Avoid Slow, Harsh Ways How Shavaid Makes Lather Doubly Effective Tomen who find shaving exasperating we offer here a newfreedom. A better, quicker. simpler way which, once tried, you will never abandon. And we back our statements with a Free Trial Tube, so that you may be completely convinced. The coupon brings it. FYSHIS is to urge you to try — for your own sake—a new shaving method. A way which has already won the friendship of thousands of men the country over. Your trial of Shavaid, we promise, will be a revelation For most men have come to the conclusion that shaving would always be a task. Read here what Shavaid does; then—if these things appeal to you—let actual proof decide whether you can be content with the old, tedious way. Saves Time and Trouble Merely apply a thin coat of cooling Shavaid to the dry face. Then your favorite lather, which needs no rubbing in. Then shave with real comfort. No need to copy the barber’s preparations. He rubs the lather in. Yet, when he is through, there is irritation. uses hot water, hot towels. So he applies lotions. Harsh, harmful ways of treating the face should They age the skin. The skin becomes leathery. be avoided. too early. The Shavaid way is the comfort way. It is scien- tific, the result of countless experiments and tests Shavaid Softens the beard instantly —apply to dry face before the lather. ; Saves time and trouble —no hot water, no “rubbing in” of the lather. Protects the face —skin remains firm and smooth. Removes the razor ‘‘pull’’ —harsh ways age -the skin prematurely. Replaces after-lotions —Shavaid is a cooling, sooth- ing balm More Than a Time Saver Shavaid, of course, ar chiefly because it save But it does more than t it saves the skin. Whi ening the beard instant also forms a protecting over the cuticle. The remains firm and smoot! The razor glides over out pulling, without ser: the skin. Abrasions ar: so frequent. The closest shave caus¢ discomfort. When you use Shavaid can discard the after -lot for the sources of mist ment are gone. Try This Luxury Wrinkles come Shaving Method The coupon below brings you a Free Trial 7 Send for it now; then see if you want to adopt Sha We are sure it will delight you, amaze you, that you will never shave again without it. OS ES. a a a a ees ee (R8) | Ne Free Trial Tube\ ' BAUER & BLACK, Chicago, IIl. Mail free trial tube of Shavaid to Name . Street Address. . ee le you will tell your friends of this better way Shavaid, only brought orders from dealers everywhere. G¢ at your nearest druggist’s for 50c a tube If your dealer cannot supply Shavaid, we be pleased to fill your order direct. recently introduced natior At Druggists —50c a Tube BAUER & BLACK Chicago New York Toront« Shavaid Makers of Sterile Sargical Dressings | and Allied Products Please Méntion Popular Mechanics ||

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POPULAR MECHANICS ADVERTISING SECTION Readi- Cut Homes Before You Build —Be Sure of Getting Complete Shipment of Materials Shortage of materials exists everywhere. Lumber stocks were never so low as at present. Nails are practically impossible to secure in most communities. Orders for doors and other mill work are six to twelve months behind delivery dates. Many towns have.a glass famine. Lath are about impossible to secure ind going up in price regularly. And nearly all other items are difficult to obtain. This will cost millions of Dollars to those who build this year in delays on the job. The man who plans to build will probably suffer, unless he secures a guarantee of delivery of complete materials. Aladdin Shipments Overcome All Difficulty. You Are Protected by a Guarantee Upon receipt of your order you will receive a bonafide guarantee of complete shipment of all materials required to build the Aladdin Home you purchase. Where else can you get such a guarantee of prompt, complete and satisfactory shipment of all materials ? Aladdin Houses Are Complete— Don’t Delay Early buyers of Aladdin Homes are assured delivery. Aladdin buyers are also assured a big saving from $300 to $1,000 BUT quick action i > nece ary The enormous demand for ho es will soon fill the Aladdin Mills to capacity. Your order will possibly be too late. An important mes o ige to every builder is contained in the Aladdin catalog It is the ie message to you from the world’s greatest home-building rganization tise ! Send today for this 100-Pa Book No. 58 The Aladdin iaiinaas Bay City, Mich. = BRANCHES = Wilmington, N.C Portland, Ore Hattiesbure, Miss Toronto, Canada

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Li4 POPULAR MECHANICS ADVERTISING “Good workmen know the difference”

SECTION

“Ask Skinner Edwards” Skinner Edwards runs a buffing machine in the Roth Shoe Company’s big factory out in Cincinnati, Ohio. Skinner is a veteran—40 years, man and boy, he’s been on the job. Skinner knows shoes from the steer to the shoe store, but buffing is hisspecialty. Nothing about sandpaper and leather he can’t tell you. Every time a question on buffing comes up In the Roth factory it’s ‘‘ask Skinner Edwards.’’ And Skinner always has the dope. And so, when Kellogg, a Manning Speed- grits salesman, walked into the Roth Shoe Company’s office one day last spring, Mr. Schaeffer, the foreman, led him out into the factory and turned him right over to Skinner. Sta? said Skinner, © just leave me your samples, I’ll make my own tests. "If there’s a difference in Speed-grits I'll sure find it.”’ So Kellogg left a batch of sample Speed-grits sheets and went on his way

always for this trade mark on the back of every sheet, belt or disc. Skinner looks Two weeks later Kellogg stopped off aga at the Roth plant. This time he headed straight for Skinner Edward’s buffing machine. Skinner saw him coming and stopped | machine. **Well, Mr. Kellogg, I thought *twas about t you turned up,”” he said. ‘‘Speed-grits is all right O. K. every I made four tests—your Spe ° ° “ 1 24 ° grits, against the brands of sandpaper we've u here. With Speed-grits Durite I cut nearly more leather in the same time and the sheets last *most twice as lor ” ag way. } all Speed in production is the big thing these d All over the United States manufacturers in wh factories abrasives play a part have found by tl Speed-grits test of Skinner Edwards that it pays t specify Speed-grits when ordering abrasives. Don’t say Sandpaper—say Speed-grits. Write for ‘“The Difference Book.’’ Manning Abrasive Co., Factory and Troy, N. Y. Sales Address t Labc rator Boston, Chicas offices in Cincinnati, New York, Philadelphia, St. Louis, $ Francisco and other principal Manning Look 1 book cities. Abrasive Co. in your telephone

Speed peed-s comes in the f varieties Garnet Paper Garnet Cloth Garnet Combinatio Flint Paper Emery Cloth Emery Paper Meialite Clot! Handy Rolls Grinding Discs Durite Cloth Durite Pape Durite Combination Durundum Paper Durundum Cloth LUDRSPRDOTNOLL LLL neannenaoneN | LobAN El j rils LULULSUORRAMEES LE rifts RegUSPat Off Serevent

Please Mention Popular Mechanics

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nkee’ CY Return Ratchet drive? i practica erful Push }ou car j ollou bankes 1/ ‘ Chuck ht Dnill SCTrTeu ren coun nile hat illu frated f and Lett tid Ratchet l Riet POPULAR MECHANICS ADVERTISING SECTION 115 AK EE **Spiral Ratchet screw-driver oves Its Worth! Three full pushes of the handle drives a 3-16" wood screw nine-sixteenth of an inch into a pine plank. Time 2 seconds! To drive the same screw a like distance with an ordinary driver necessitates releasing grip on handle sixteen times. And it takes 15times as longtodo the job. Think what this means in the where saving of time and labor many screws are driven. \ The “‘Yankee”’ Spring-in-handle makes the quick return’’ that means work can be done with one hand. Speed! Fast as you can move your hand rhe spring holds the blade snugly in screw slot. Makes work possible in awkward places (where both hands can’t be used Draws screws just as well. Reverse ratchet shifter and push al Qa be Ae ee a eee OE ee ee t a. - Wrede »y free Yankees Tool Book 3 howing Yankee | Tools in action het : | ter ways of drilling AL horing, tapping and VJ jy neand drawing j res North Bros. Mtg. Co., Philadelphia You - ge dD: ale? ’ Can Supply You Please Mention Popular Mechanic

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116 POPULAR MECHANICS ADVERTISING SECTION pyathetcaates NY, (old a Vole Moy tum Xa o} wereneceauloyel “hk ULTONA a PLAYING A BRUNSWICK RECORD An Invention That gave phonographs new standards There was a time when each make Play any record of any make on of phonograph played only its own The. Brunswick, Note the finer repro- make of records. Each owner, there- duction, truer tones and_ shadings fore, was limited to one make. He _ hitherto hidden. had to forego many favorites. Another great feature of the Bruns- The Brunswick Phonograph was wick Method of Reproduction is the one of the first, if not the very first, to Brunswick Tone Amplifier, built bring out the idea of an all- record instrument. It caused a revolution in phonograph making. eti- tirely of wood, conforming to acoustic laws. No metal is used. Tone waves are not cramped. This amplifier adds tremendously to tone quality, as you will note immediately upon hearing The Brunswick. This initiative led to the development of the Ultona, an exclusive feature on The Brunswick. It plays all rec- ords at their best. Ata turn of the hand the Ultona pre- sents to each type of record the proper diaphragm, _ the proper needle. The latest Brunswick tri- umph is in the introduction of Brunswick Records. Here again are countless’ im- provements, Go to a Brunswick dealer before you buy your phono- graph. Ask to hear this super instrument. Compare it. You cannot find its equal. This does away with make- shift apphances, trouble- some changes of reproduc- ers and poor playing. THE BRUNSWICK-BALKE-COLLENDER COMPANY General Offices: 623-633 8. Wabash Ave., Chicago Branch Houses in Principal Cities of Canadian Distributors: Musical Merchandise United States, Mexico and Canada Sales Co., 819 Yonge St., Toronte Please Mention Popular Mechanics

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POPULAR MECHANICS ADVERTISING SFCTION 117 You Cannot Afford to Lose Money Invested HE money you invest is the money you lay aside for the future, to make you independent in your declining years, to provide a living for your dependents after you are gone. This money is a different kind of money from that which you spend every day. It really does not belong to you, but to your family and your future-self. You cannot afford to lose it. You cannot afford to get less than 6% on your investments — the highest rate consistent with safety. You cannot afford to worry — to see your investments decline in value and be worth less than you paid for them. You cannot afford to wait for payment of principal and interest. If you desire an investment that will meet all your wants, satisfy all your requirements, and give you a feeling of complete security, satisfaction, and peace of mind, fill out and mail the coupon at the bottom of this page. This coupon will bring you full information regarding the first mortgage 6% serial bonds safeguarded under the Straus Plan, the standard safe 6% investment of the nation. Their safety is shown by their record—-38 years without loss to any investor. They yield 6% net, with 4% Federal Income Tax paid, and they are always worth 100 cents on the dollar. You cannot afford to delay putting your house in order and placing your reserve funds in securities so safe that you cannot lose. Fill out the coupon and mail it today. Full | literature —sent without charge or obligation — will be in your — ee a a | | 1 J | hands by return mail. Coupon F-10921, 1920 S. W. Straus & Co. Straus Building, Chicago S:\W.STRAUS & CO. Sirs:—I am interested in learning the details } Established 1882 Incorporated of your plan of safe investment. Without obli- | NEW YORK CHICAGO gations to me, please send me Booklet F-1021 | 150 Broadway Straus Building | Detroit Minneapolis San Francisco Philadelphia Cleveland Milwaukee = Boston Name Indianapolis Washington Buffalo Los Angeles Pittsburgh : Address | 38 Years Without Loss to Any Investor

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POPULAR MECHANICS ADVERTISING SECTION ‘You cant rub him the wrong way That’s the beauty of that fellow Williams’—his ability Aster the shave y Your choice of to adapt himself to whatever condition arises. He can “iismoy the co four forms get on without pull—his rich and creamy lather has sat- tiams’ 1 ses Holder-Top Shaving isfied his thousands of friends of that. Over 75 years of ow Shaving Crean experience have taught him all the curves in his business. Carution. Row pie yh And even the young blades admit that daily contact with = =*"" Ut FOE MT Sis him seems to make them sharper. of all four for which you prefe ‘Williams has a lot of near-relatives. But somehow they don’t seem to have quite his gentle, soothing manner —or his perpetual good-humor that never becomes dry. stamps for any ot THE J.B. WILLIAMS ‘ Dept. A, $6 Glastonbury, Conn If you don’t know Williams’ take a tip from me and make his acquaintance. You won’t have any trouble picking him out of the crowd.’’ Ifyou prefer tr lealer for W ing Soap or Wiliar I Williams string sec WV COMPANY MAKERS | \F MAT) NEE V METS, JERSE TY CREAM AND OTHER T ET SOAPS. TAI LC POWDER, DENTAL C§& Please Mention Popular Mechanics

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POPULAR MECHANICS ADVERTISING SECTION 119 Brush teeth As dentists urge—as millions now are doing All statements approved by high dental authorities Leading dentists all over America are urging the adoption of a film-removing tooth paste. Millions of people have already proved it. In every circle nowadays you see white, glistening teeth. Ask about them and the owners will say, probabiy, that Pepsodent has done it. By fighting film Those results come from fighting film — that viscous film which ever forms on teeth. Most lack of luster is now traced to that, also most other tooth troubles. Film clings to teeth, enters crevices and stays. The tooth brush does not end it. The irdinary- tooth paste does not dissolve it. So much of it stays and hardens, until you have it taken off in the dentist’s chair. Film is what discolors—not the teeth. It is the basis of tartar. It holds food substance which ferments and forms acid. It holds the Pepsaodent REG.U.S. The New-Day Dentifrice A scientific film combatant, now advised by leading dentists everywhere. Druggists supply the large tubes. acid in contact with the teeth to cause decay. Millions of germs breed in it. They, with tartar, are the chief cause of pyorrhea. All these troubles have been constantly increas- ing for lack of a film combatant. The way is found Dental science, after years of searching, has found a way to fight film. Five years of clinical and laboratory tests have proved it beyond question. For home use the method is embodied in a dentifrice called Pepsodent, made to meet every dental requirement. And to make it known quickly in every home, a 10-Day Tube is being sent to everyone who asks. A convincing test The Pepsodent results are evident and quick. A ten-day test will leave no doubt about them. And a book will tell the reason. Pepsodent is based on pepsin, the digestant of albumin. The film is albuminous matter. The object of Pepsodent is to dissolve it, then to day by day combat it. A new discovery makes this method pos- sible. Pepsin must be activated, and the usual agent is an acid harmful] to the teeth. But science has found a harmless activating method. Now active pepsin can be constantly applied, and forced into every hiding place of film. Send the coupon for a 10-Day Tube. Note how clean the teeth feel after using. Mark the absence of the viscous film. See how the teeth whiten as the fixed film disappears. Look at your teeth now, then look in ten days. Let your own teeth decide between the old ways and the new. This is important. Cut out the coupon so you won’t forget. Ten-day tube free THE PEPSODENT COMPANY, Dept. 497, 1104 S. Wabash Avenue, Chicago, I) Mail 10-Day Tube of Pepsodent to Only one tube to a family Please Mention Popular Mechanics

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POPULAR MECHANICS ADVERTISING SECTION supplies one of the greatest needs of the vacation season, a reliable writing implement with a self-con- tained ink supply that releases you from the slavery of a desk and ink well and turns all outdoors into a convenient place at any time to do all the letter writ- ing that family ties or business and social activities demand. Three types: Regular, Safety and Self Filling $2.50 and up at Best Dealers L. E. Waterman Company 191 Broadway, New York Chicago Boston San Francisco tease Mention Popular Mechanics

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POPULAR MECHANICS ADVERTISING SECTION —@ New Lessons in Shaving’ Hot towels and fin er rubbing ete) needed. T e secret of softening the beard lies in emulsifying the oil coat on the beard. Copsricht, The Palmolive Co., 1920 What Science Has Done to simplify shaving years go we began to fies the oil coat on the beard; so ving tudy in the the water penetrates quickly. . ‘pe I i Free—a trial tube = / _—— And such a shave as you enjoy re certain there was a with Palmolive! You never Free yourself from iy to make each hair dreamed a razor could glide y old -time shaving d c smoothly over the face. This i faults. Know how , and we sought to find it " ’ - be ise this lather also lubricate quick and easy : nd lied the beard. We learned the skin, so the razor can't scrape pleasant shaving obstacle in fitting the or irritate, ~n' aw fe , A ‘ trial tube o alm- every hair of the beard Both lather and lotion olive will prove a we found, did not yield revelation to you. the razor wa the oil ild to the ordinary lather Palmolive contains both Pa! Send for it todav. was difficult for water to and Olive oils, Thus it is a lotion No charge. Simply and soften the beard as well as a lather. It gives the mail the coupon. ilt, men had to apply hot skin a satin smoothness, a d or rub with the fingers. lightful cool “after feel when shaved. No other applications ar¢ necessary. Try it free The solution solution to the problem, we y in a different lather Note the coupon here. It brings were using And we you a trial tube of Palmolive mths experimenting with Cream free and postpaid. We tried 130 for Try a Palmolive shave and sex before we achieved our what an amazing difference ive formula and mastered Note that vou don’t. have to re- st remaining problem, . . lather with Palmolive, becaus it ind that men may know what a dif- re ws bong “> ow me ~4 — j nere , 8 i iple oO ‘ shay y e it makes in shaving we are = gs — toe aos Free mnaltioties itself in ” iin teat iaticeenecen, ring a trial tube free. lather 250 times. There's enough 5 ' for 152 shaves in our 35c size. A ° ' ae cream so active, as you know, is © For a free trialtube } y something decidedly new. ' ' With Palmolive you need no hot But don't accept our word for ' ’ . . ' v or rubbing to soften the the wonders of Palmolive Cream . The Palmolive Company, ' rd. You just put a bit of the Be the judge yourself, at our ex ‘ Dept. 104, Milwaukee, U.S. A. m on the face, whisk it up pense. Use a trial tube free. Send ' : P= : ' to a lather, and your beard is for it today ' oa Please — : ; vrs fe : . ly for the razor! This is be fe — © ene of 1 — ' ise Palmolive instantly emulsi- Large size tube at druggist 8,35c 7 , ; e 5 s ' THE PALMOLIVE COMPANY 5 ' S ' Milwaukee, U. S. A. ; ' at aeatin t . ~ i ee ee ee ea a Please Mention Popular Mechan

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122 POPULAR MECHANICS ADVERTISING SECTION 4 PIR IR RR a aMee MMe AES OE COE EEE ERE ERE EERE EEERREOR EERE ELS DERE RE ERLEEEREAR EERE, | : | Is | |M | if | 14 | IM | P| | s | MV VM | LON GWEAR M MATERIALS OF ENDURING N | STRENGTH AND WORKMAN - 4 | SHIP OF SCRUPULOUS CARE 4 | MAKE BVD-WEAR FAR BEYOND M | WHAT IT 1S FAIR TO EXPECT I ‘NO UNDERWEAR IS BVD WITHOUT i | THIS RED WOVEN LABEL. is yi | ‘MADE FOR THE | Ie ( Ea) i ‘i |_BESTRETAILTRADE | | o7}] rane Meare Rigg US Pot OME ort Foreyere Conemervendd | “| THE B:V'-D- COMPAN™ vi NE WY ORK

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POPULAR MECHANICS ADVERTISING SECTION 123 The shoes men are buying for summer comfort Many _ new types for outing and everyday wear ? / at the tennis court—wherever you go this summer you will see Keds. _ ese light, springy canvas shoes are ideal for work or n warm weather. Their elastic rubber soles put new your step. Their soft, pliable fabric makes them cool and comfortable. are just the thing for games or any kind of summer They allow the foot full freedom with just the right They always give a perfect grip, whether you are gy a fast set of tennis or standing on the smooth deck otor boat. It is because of these features that Keds popular for every vacation need. \ THE seashore or in the mountains—on the street or Other types of Keds The standard shoes for tennis, boating and vacation wear. Made of light canvas, in high or low models s these standard types Keds are made in many spe- white or brown—with black, gray, or red rubber soles. lels for different purposes—high shoes and low shoes, r without heels, in many weights, shapes, and colors. are sturdy work shoes, light gymnasium shoes, and reinforced models for hiking and rough service. e of the latest models are made just like leather shoes, regular welt construction soles and firmly boxed toes. This ; a more formal, dignified sshoe—just the shoe you have ded to wear with your white flannels or Palm Beach suit. With-these additions, Keds are now a complete line of can- mmer shoes—ranging from the easy, less formal tennis to the latest and most fashionable styles of footwear. year millions of pairs of Keds were worn by men, men, and children, Keds are made only by the United States Rubber Company oldest and largest rubber organization in the world. You will find them at every good shoe store. Ask to see the ous models—notice how wonderfully light, cool and com table they are. Look for the name Keds on the sole. For men and women $1.50 — $7.00 For children $1.15 — $4.50 One of the smart pecial rodels for summer ‘wear Made of the finest white canvas hig h or Oxford model with welt constr Ss soles which give all the style of leather #410 \; Sturdy sport shoes—with or without heels. Made of heavy white or brown duck. Brown leather trimmings with ankle patch —red rubber soles and toe cap. United States Rubber Company Please Mention Popular Mechanics

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POPULAR MECHANICS ADVERTISING SECTION Scene in one of the Her Powder Company's pa hous The Dynamite Maker and the Food Supply (he dynamite maker’s service to all of us does not cor solely of placing explosives in the hands of the miner for t production of our coal and metals. - The labor of these n in the Hercules plants ts alsoclosely connected with the mo fundamental of all industries— agriculture. Their w helps to provide the food that nourishes us With the increase in the country’s population, new agr tural lands are required to sustain it, and these are be secured by reclaiming our vast areas of stump and swat land. Hercules Dynamite is being used extensively i veloping these sources of food supply that have hithe lain dormant and unproductive. The sixty million acres of swamp land in this count now a menace to public health— await the product ot dynamite maker to transfer them into fertile, product farms It has been stated by Government authoritie one man with dynamite can dig as much ditch as six with picks and shovels In many sections of the country, our Agricultural S Men are demonstrating the use of explosives to land ow ind contractors. If you desire further information, w the Agricultural Department of the Company at WiIn ton, Delaware “Progressive Cultivation a 68 booklet, gives full information about the use of explos for agricultural purposes H. ERCU. LE S HERCULES POWDER CO. Please Mention Popwula Vechanie

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POPULAR MECHANICS ADVERTISING SECTION __- WINCHESTER . 125 1866 A JUNIOR lr WAS only three weeks after I joined our Unit for target practice that I won my first medal and the rank of Marksman. Yet away the other boys said I didn’t dare right make any more low scores. I couldn't see how I was going to shoot that vell, but our instructor, Mr. Bradley, turned me over to his new assistant, Mr. Kerr, for special instruction. Mr. France! Kerr had been with the Marines in He helped me a lot, and I soon got so I could now and then make the necessary score of 24 out of a possible 25. It takes a total of fifteen such tergets to win the Sharpshooter Medal. Then Mr. Kerr said I wouldn't be a real Sharpshooter unless I could make the necessary scores without being coached. he was right. And of course I kept plugging away, most of the time with out his help, getting a 24 now and then, but no perfect scores. Once in a while, Mr. Kerr coached me. Finally, when I had two more qualifying targets to make, I managed to shoot two perfect scores of 25 without the help of my coach! I'll say I was happy! [ am prouder than ever of my Winchester repeater; for the more I shoot it the more | appreciate its fine accuracy. Of course a fellow doesn’t have to own a repeater to get to be a Sharpshooter. The rules allow you to use any Winchester, so long as it is .22 caliber. And several fellows who have only the little single-shot kind, are doing ba. Sseaggede- The Winchester Medel 06 .22 Caliber Repeatir g Rifle HOW I GOT TO BE SHARPSHOOTER fine. Mr. Bradley says the steel in the barrels is all alike in quality and they are all bored the same way. Also, that the ordinary Winchester cartridges we buy are the same as many expert grown-up shooters use in matches. Now I am going to try to win an Expert Rifle- man Medal. I guess that will take a long time But while I am trying I will be helping our Unit, for Mr. Bradley has chosen five of us to enter the State and National target shooting matches You, too, boys. Start now Hike down to th hardware or sporting goods store in your commur ity where they sell Winchester Ammunition fl 22 caliber Rifles and é. if you need one, and some ammunition, get a complimentary instruction book and some targets, and arrange to attend target practice. If you wish further target shooting, fill in and mail the coupon belou Buy a ri information on ve mummnn«Hnn, € OC T-OUT COUPON enum enmmnoevonneenn ene ne Winchester Repeating Arms Company : New Haven, Conn., U.S. A. = Gentlemen : I would like to join a properly organized . target shooting Unit for boys. Please put me i F touch with a good orgamzation and send othe E informatimor Also tell me how to organize a . Local Unit = Name : Street Address : Caty Seonnesnsensneonesservennsserosessenserssnsesssees enveneneee sovenoesvonnevacveassnenssvssssesnsnnsnesrsenes WINCHESTER REPEATING ARMS CO. :-:- Please Mention Popular Mechanics NEW HAVEN, CONN., U.S.A.

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POPULAR MECHANECS ADVERTISING SECTION

be io IB Re Soho 32 390 No ko 39 Ne Ko 3e 30 Se De BeBe de} VERIRAD LO) one! aN [o)

SCOUTS EIT IT Lin tte TUNG STiel BATTERIES MAZDA BULBS eal I a ae Deleloleleielel sidan ci cielo $3,000.00 YOU? HREE thousand dollars in cash for one person; a thousand dol- lars for another; five hundred for each of three other people and ninety-nine other cash prizes from two hundred to ten dollars. Ten thousand dollars in all! How much for YOU? This latest Eveready Daylo Contest will break all contest records. Anyone may en- ter—it costs nothing; there is no obligation of any kind. Men, women, boys and girls all have equal chances for any of the 104 cash prizes. TSR _-<

for Somebody. On June ist, Daylo dealers throughout the United States and Canada will display the new Daylo Contest Picture in their windows. Go to the store of a Daylo dealer and study the picture. Secure a contest blank, which the dealer will give you, and write on it what you think the letter says. Use 12 words or less. For the best answer that conforms to the contest rules, the winner will receive $3,000.00 in cash. Get an early look at the picture. Submit as many answers as you wish. Contest blanks are free at all Daylo dealers All answers must be mailed before midnight, August Ist, 1920. f i " , dd baectiié,, i Please Mention Popular Mechanics

‘This is the sign that identifies dealers showi “Daylo ; )OOO Conte “Picture. look forthis the Everead sign on dealers’ windows another ake e? 4 at ‘ contest! e- *10000“InCash Prizes 2 Pivot Priss....cceece $3,000.00 1 Second Prize........ 1,000.00 3 Prizes—$500.00 each. 1,500.00 4 Prizes—$250.00 each. 1,000.00 5 Prizes—$200.00 each. 1,000.00 10 Prizes—$100.00 each. 1,000.00 10 Prizes—$ 50.00each. 500.00 20 Prizes—$ 25.00each. 500.00 50 Prizes—$ 10.00each. 500.00 104 Prizes Total $10,000.00 Answers will be judged by the editors of “LIFE” and contestants must abide by their judgment. If two or more contestants submit the identical answer selected by the judges for any prize, the full amount of the prize will be paid to each. Contest begins June 1, 1920, and ends Midnight, August 2, 1920. Postmarks on letters will determine if letter was mailed before close of con- test. Answers must contain not more than 12 words. Hyphen- ated words count as one word. Complete Contest Rules are printed on Contest Blank. Ask Daylo dealers for them.

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Wurlitzer Saxophone Outfi > Wurlitzer. Violin Oulfe Wurlitzer " yr Banio Outfit. Bey it ] yA oS a A & ” Ps “=a, ps: 3 * 4 4 " / ~~ na is 4 | Wurlitzer ® =~, >, \ Mazncclin aa ' e Outit , } Wurlitzer Banjo sh Ukulele Outfit em / 200 YEARS OF MUSICAL INSTRUMENT MAKING Please Mention waasesee Jeune Popula POPULAR MECHANICS ADVERTISING SECTION Wurlitzer ) Cornet Outfit — Free Trial END now for the New Wurlitzer catalog and free trial blank. You may have any musical instrument with a complete musical outfit for a week’strial at home. Return the instru- ment at our expense at the end of the week if you decide not to keep it. You will get a complete musical outfit, including the instrument. velvet and plush lined carrying case with lock and key, self instructor, instruc- tion aids, book of music, all attachments and extra parts. Everything at factory cost, a tre- mendous saving. Wurlitzer supplies the outfit and instrument practically for the cost of the instrument alone, Convenient Monthly Payments A few cents a day will pay for your instrument and outfit. of Wurlitzer instroments fe Artistic Quality known all over the world. Wurlitzer instruments have been the favorites of artists and have been used in the finest orchestras an@ bands for years. This outfit offer includes genuine Wurlitzer instruments. in this offer of sree trial in your own home. Have your free trial now. | We do | not charge you a penny for t. i ' Send for New Catalog and Free Trial Blank Every instrument known illustrated and described, with Price and smal! payment terms ore pictures and more information about musical instruments than in any other book published. It is a veritable musical ency- clopedia. Free trial blank comes withit. Catalog is FREE. There is no obligation. Write for it today. The Rudolph Wurlitzer Co., Dept. ai19 117 E. 4th Street, Cincinnati, 0. 329 S. Wabash Ave., Chicago, lll. | Every known musical instrument included ] | } | The Rudolph Wurlitzer Co., Dept. A119 117 E. 4th St., Cincinnati,O. — 329 S. Wabash Ave., Chicago Send me your new catalog with illostrations in color and full deseription of the Wurlitzer Complete Outfits and de- tails of the free trial and easy payment offer, Address (State tnstrument you are specially tnterented in) Vechani«

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FOPULAR MECHANICS ADVERTISING SECTION A-a-a-h!! or U-g-h!! “WOU can lead a horse to a trough, but you can't make him drink,’’ is the old, yet true expression. Nearly everybody has been led to understand that Nature provides the most beneficial correctives for stomach disorders—especially constipa- tion. Yet, thousands of people fail to drink out of Nature’s fountains. This is due, often, to the lack of knowledge of true dietary prin- . ciples. Now, science has prepared super- foods—crowded with health giv- ing properties. These foods, Fruited Wheat and Fruited Oats, bring to you in easily digestible form—a combi- nation of fruits and whole grains -Nature’s laxatives. Fruited Wheat or Fruited Oats are tempting, delicious and appetizing. You cannot help but smack your lips and say— A-a-a-h !! Therefore, why-submit to harsh medicines which make you shudder and exclaim — U-g-h!! Enjoy a laxative health food in true palatable form. Delicious! Less than a Penny a Dish! UNITED CEREAL MILLS, LTD. QUINCY ILLINOIS

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POPULAR MECHANICS ADVERTISING SECTION 199 OO ~~ rd ey 2 “T Said | H . >> we tise, Z to | —. © | |‘ is important that you say “Hires’’. Because Hires 7 is pure and healthful; while X imitations of Hires may be harmful. Nothing goes into Hires but the pure, healthful juices of roots, barks, herbs, berries—and pure cane sugar. The quality of Hires is maintained in spite of tremendously increased costs of ingredients. Yet you pay no more for Hires the genuine than you do for an artificial imitation. Don’t trifle with imitations. Say “Hires” at the fountain, or order it in bottles, by the case, from the dealer. THE CHARLES E. HIRES COMPANY, PHILADELPHIA tHlires Hires contains juices of 16 roots, barks, herbs and berries —») Please Mention Popular Mechanics

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Sand Paper is NOT made with sand A disc grinder using U.S. flint or garnet paper smooths wooden things in a jiffy. Disc grinders are made in various izes; horizontal and vertical types. Why tear a whole sheet of paper to get a smal! piece? Forcon- venience and economy, use U. S. Abrasives in rolls of varioue widts and lengthe. Herculundum in rolls of various widths and grits should hang above the bench of every metal worker. more economical. POPULAR MECHANICS ADVERTISING SEULION Garnet Paper Emery Paper Crocus Cloth AND is round; cutting tool. cutting edge. Fast-Cutting Mineral Abrasives On cloth and paper Flint Paper Herculundum Cloth Sheets, Discs. Circles, Belts and i Widths and lengths of the above | it will not cut. Like other tools, Not all sand paper is alike. Garnet Cloth Emery Cloth Carbalox Cloth lls of various Ss. Abrasives. Sand paper is a it must hold a Good abrasives are made by us from flint rock o: garnet, crushed, sifted to different fimenesses and everlastingly glued to strong cloth or tough-fibered paper especially made for the purpose. Other U. S. abrasives are from the fiery electric furnace, remark ably tough, and hard enough to cut metals: these are known as Herculundum and Carbalox. For cast iron and similar materials, Herculundum is ideal. Carba- lox is best for steel, brass, copper, aluminum, etc In modern woodworking plants, U. S. Sand Paper—flint a garnet—are used in sheets andconvenient width rolls for all kinds of finishing work. Here, high speed belts of sand cloth, sanding drums, and discs make rough surfaces smooth, quick as a wink In foundries and machine shops, discs of Carbalox and He: lundum, now used on disc grinding machines, are doing finishing work, formerly handled by planers and milling machin at a great saving of time and labor. Buy your abrasive papers or cloth as you would fine tools. Our Service Department will study your requirements and recomm: the grades best suited to your work. Tell us whether you work wood, metal, leather or composition materials. UNITED STATES SAND PAPER Co., Williamsport, Pa. New York Philadelphia Chicago U. S. Emery, Carbalox and | Savee time: Please Mention Popular Mechanics Stocks at following Branch Offices: Boston Detroit San Francis Discs of Hercu/undum and Carbe lox cemented to horizontal or vertica wheels are great time saversin finis! ing all kinds of castings und forgings ¢ fit. Get the complete story on this

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POPULAR MECHANICS ADVERTISING SECTION l Tt ct cru Keep your electric tools on the job yf ng ERY time the cord on a portable elec- It protects against le lit rhe y mo- 4 tric tool orextension lamp wears through, ment counts It helps get work out on tool or lamp stays idle until a new cord schedule Its much longer life makes it a tted. Usually the workman stops also genuine economy Duraéord will keep your tools working full Duracord can be turnished in all sizes of e, week after week, without replacement portable electri cord and also in the la portable electric cord with the heavy sizes of single and duplex cab! Ask 4 7 en covering withstands wear and abuse to electrical jobber about Duracord or let us send ” mazing degree. It will outwear ordinary you samples ot Duracord and ordinary cord is many times. for you to test and compare voursel ‘ TUBULAR WOVEN FABRIC CO., Pawtucket, R. I. Vakers of Duradu f Flexible Non-Metallic Conduit and tubular woren Fabrics fall kinds “| FURACORT) TRADE -MARK Please Mention Popular Mecha

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POPULAR MECHANICS ADVERTISING SECTION Keeping the lines open | rr, Are you running a home, a store, an office building or a factory ? Then perhaps you know how hard it is to get help and to get material for repairs or additions. Think, then, how much greater are these problems in a business requiring hundreds of thousands of workers and countless items of equipment—a public utility, for instance, like the telephone companies. They have thousands of exchanges and millions of miles of out-door construction to keep in order. Their difficulties are increased many-fold over the average business because the engineering, manufacturing and install- ing of a modern telephone switchboard take at least two years. In pre-war days, the telephone engineers had a way of looking forward. They undertook to estimate the growth of population and the opening of new streets, so that they might build with the probable needs of the future in mind. For this expected demand they maintained reserves of plant equipment, which stood them in good stead when the war put a stop to customary building progress. So while thousands of telephone men were running lines across shell-torn France, you could still call up the candy store and order your Sunday brick of ice cream. 3ut the Armistice opened the flood-gates to a torrent of new business, wellnigh overwhelming the country’s telephone systems, with so many of their people still in service overseas. That the lines of communication have since been kept continuously open is an achievement but little appreciated by the public. It was made possible only through the efforts of the host of loyal telephone men and women every bit as faithful to the task as those who kept open the lines in France Csfern Eechric Company No. 8 On the farm or in the metropolis, wherever people look to elec- tricity for the comforts and conveniences of life to-day, the Western Electric Company offers a service as broad as the functions of electricity itself. al ZA Published in the / interest of Elec- | trical Develop- ment by an Insti- tution that will \ be helped by what- ever helps the Industry.

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POPULAR MECHANICS ADVERTISING SECTION saat Compactness Is Is Vital ind littl folding sturdy Corona doing a ma SI17¢€ b Thus its extraordinary mmpactness and lightness place Corona among the little giants of achievements As in the modern thin-model watch which keeps perfect time and tl pocket camera which make sharp, clear pictures, so in Corona, inventive geniu reduces size while it increases etticiency ostly ofhce space, limited traveling quarters, high j | transportation charges, expensive and none too 8 @ tri " abundant clerical help these and a score of othe is, travcis reasons have placed Corona in the hands of over snug ry 200,000 users who value it f its unfailing useful : a8 rer “re ness, its retiring disposition when t busv and its r sien okt enduring toughness under heavy d $50 . ith Corona Branches and Agencies all over the world nr CORONA TYPEWRITER (0O., I he Personal Wri ting Machine Fold it up — Take it with you —Typewrite anywhere

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13 { POPULAR MECHANICS ADVERTISING SECTION ‘Fw do you heat water on wash-day? It hasn’t been very long ago when the old wash bench and tub were in vogue. In those days they heated their water in copper kettles on top of the wood range. /) Pittsbur Automatic Gas Water Heater. Please Mention Popular Mechanics OME women still use the old methiog of heating water on the gas ranu dripping it from stove to tubs. Most of their day is spent in heating and | dling water. Their more fortunate neighbor, with a Pittsburg Automatic Gas Water Heate; in the cellar, does her wash in hal! time, with half the worry and work, and at half the expense. Nothing cheers up washday like the Pittsburg Automatic Gas Water Heate: You can begin early and get throu early. A turn of the faucet and it livers fresh, rust-free hot water— as much as you want and right where you want it. And the beauty of it is, the Pittsburg Automatic Gas Water Heater doesn't profiteer. It charges only ONE CENT for ten galions of this hot water conven- ience. For your own or baby’s bath for washing a big day’s dishes, for tli sick room, day or night this hot water boon is yours at only ONE CENT for every ten gallons. This is only possible because the gas meter is forever being watched. N penny goes in but you get its equ lent in hot water. We have made arrangements so that one need be deprived of hot water forts any longer. Your gas compan) plumber will installa Pittsburg Automat Gas Water Heater in short order, and y may pay for itin ten easy monthly p ments. Write us and we'll tell you about it. Architects see Sweet's Architectural Editior Pages 1294 to 1297 PITTSBURG WATER HEATER CO. PITTSBURGH, PA, Offices and Display Rooms in Principal Cities

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POPULAR MECHANICS ADVERTISING SECTION 135 Oh! its the magic Figure 8 ; F O wonder they are all crowding around! The water swirls | They all know that it’s the magic figure 8 that through the tub in makes the 1900 Cataract Electric Washer the perfect , washing machine. -" 7 4 , a figure § move- ment—four times as often as in the ordinary washer. The figure 8 means that the hot sudsy water is forced through the clothes in a figure 8 motion and . . ° ° ° four times as often as in the ordinary washer. Comes in § and ]2 Then there’s the planished copper tub—not a sheet sizes. _ part in it to rub and wear the clothes, pull off buttons, or tear out button-holes! And when you've «st commect it finished the wash, there are no heavy cylinders to ‘#4 the elec- lift out and clean. tric light and off tt starts. The wringer also works electrically and is movable. You can swing it from washer to rinse water, to blue water, to clothes basket without moving or shifting the washer. - er ee The 1900 works quickly too and costs less than 2c an hour to operate. And it washes a whole tubful of clothes spotless and clean in 8 to 10 minutes, : . . . Our Special Trial Offer You may prove to vourself that the 1900 is the perfect washing machine. There is a 1900 dealer near you who will gladly demonstrate a 1900 Cataract Wasber ra right in your own home. Then if you wish, you may start paying for it on terms ‘ ‘ ? —EE | to suit your convenience. Remember, we also have washing machines operated by ' band and water power. Write to us today for the name of the nearest 1900 dealer, and a copy of the book, “George Brinton’s Wife.”’ It’s a story you will enjoy Molly, his pretty ittle wife, had troubles of her own until sbe interrupted a bridge party, and the: BS Sings tegen 20 Geneee 1900 Washer Company i 205 Clinton St. 1900 CATARACT WASHER } woe | nearest 1900 dealer, and a copy of 1900 WASHER COMPANY the story, George Brinton’s Wife.” | 205 Clinton St., Binghamton, N. Y. name 4 Canadian Factory and Office: | CANADIAN 1900 WASHER COMPANY { 357 Yonge St., Toronto wi ee CITY AND STATE t ADORESS Please Mention Popular Mechanics

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PUPULAR MECHANICS ADVERTISING SECTION Why an Evinrude Means More Fish Y our wise fisherman clamps an Evinrude n the stern of this boat not reat becetian he wants to dodge oar-work, but because can cover more water and thus get more fish. Distance means nothing to him. He shift from weed bed to weed bed, shallows to deep holes, in a jiffy a twist of the flywheel and he’ 3 skimming over the water with a breeze in his face. Or he can slow his powerful little Evinrude down to ideal trolling speed. Evinrude motors are simple to attach -easy to operate — reliable in perform- ance. Automatic reverse and Magneto, Built-in Flywheel type are special Evin rude refinements. Evinrude Motors are sold by most sporting goods and hardware dealers everywhere. Catalog on request EVINRUDE MOTOR CO. 283 Evinrude Bldg. Milwaukee, Wis. DISTRIBUTORS: _ EVINRUDE DETACHABLE MOTOR FOR WATERCRAFT Fp tk A Nien ROR ITE ER Be Cea ene a Please Mentio) Popula Wechanics % 4 yo / “TED | TO aa ? o

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POPULAR MECHANICS ADVERTISING SECTION 137

- . = =——- » e=— SS ¥ > —* pe N $ Si ; } i == : ] ri 7 3 vy) TOTTI

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the Harley-Davidson with chummy sidecar -is just \ A ‘‘made-to-order”’ for fishing trips. | ‘ISHERMEN SAY x ma ]\} It is not only speedy, comfortable, . te cheap to run, wonderfully sturdy— but << it will take you to lakes and streams 7. which the main roads don’t reach — a hidden waters where fish are plentiful and fishermen scarce. Paths are high- ways to the Harley-Davidson! Forty to sixty miles on a gallon of gasoline, with other running costs low in proportion—and speed to spare! Ask Your Dealer About His Easy Payment Plan HARLEY-DAVIDSON MOTOR Co. MILWAUKEE, WISCONSIN

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Jarliey-=|DavyidlsSera aes Champion” Please Mention Popular Mechanics

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POPULAR MECHANICS ADVERTISING SECTION To Help the Eyes See More and Farther —in the Woods, the Air, on Land or Sea HE eyes of m atively limit his e immediate in function at compar- close rang‘ Unaided, they njoyment of outdoor life to his ‘surroundings and restrict his in many operation But through optics he has gained other 1 far seeing eye stol elp his own. Binoc- ulars are made to lift hi bee rizon and broaden his landscape, to un | Nature’ inaccessible reaches, to expose hidden langers of the deep. On every vessel of our small, with our heroe usefulne Navy, large or forces on land and our ; in the air, the binocular made an unparalleled war record. At were its chief source of supply, meeting our crisis with more than twice ulars in a week as we for- oduced in a year! d we government is many binoc meriy pr Now, in the ways of peace, the binocular is giving service no less varied and helpful. What autoist does not multiply by many times the interest of his tours, when ac- compa! ied by his binocular? ‘Touri Le aeroplanist, sportsman, yachtsman, Nat student — all de pend upon it to increase théir vision and their pleasure. Nor is this the only optical product which adds to the comfort, safety and efficiency of life. The photographic military microscope, ophthalmic and lenses, projection apparatus, instruments and others combine a service to the world, which we are proud to have been developing along lines of preci ion middle of the to give and quality since the last ce ntury. Write for literature on any optical product in which you are interested. BAUSCH & M f Eyeglasses and Spectacle Lenses — ~ that eyes may see LOMB OPTICAL COMPANY, Photographic Lenses, Mic 3inoculars and Engineering and other Optic ROC HESTER, N. Y. “opes, Balopti« al Instr mecca better and farther a .

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POPULAR MECHANICS ADVERTISING SECTION Spring fork <amine the truss-like con- tion of the specially de i leaf spring fork and vill see why .it affords e flexibility and riding thness without any sac- f strength. The fork ers are heavy drop forg ire fitted with large iown lubricators. The designed leaf spring ient, and easily any road jolt. Double tube frame ame properis made from sof thefinestquality. the trame-head two oa: diverge, forming a e unit powerplant. of the frame not its a three point sus- for the power mechan t it acts, as well, as a cing shock absorber. AY, Fa Wah La " } ‘ \

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_

AK a /

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INDIAN Scout Model G20 Bi - ; Ss ZA Double tube frame and special spring fork Eminently noteworthy among the struc- tural achievements of the matchless INDIAN Scout, are the double tube frame and the special spring fork. Since these units are closely allied in point of service, they are closely united in mechanical excellence. Super-sturdi- ness of build combined with lightness in weight, the prime essential of motorcycle perfection, is common to both. The utmost in stress-resistance, both laterally and longi- tudinally, assures that these Scout members will safe- guard the vital alignment of working parts. They form the backbone of the time-tried INDIAN hardihood. They are built to “stand the gaff,” and their faithful adherence to this built-in idea merits the confidence they win everywhere. Department 37 HENDEE MANUFACTURING COMPANY Springfield, Mass. The Largest Motorcycle Manufacturer in the World

oe )) K/) 7 / ned Lh hs F; naan Motocycle For Sale by Dealers Everywhere

Please Mention Poputer Mechanics

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140 POPULAR MECHANICS ADVERTISING SECTION eg Bf a Fg ER MIT ALIC cle Tires Z eae | “Some Tires, Pll Say!” **I bought this pair of Vitalics over six mont ago and haven’t had a puncture yet!”’ Punctures are almost unknown to Vitalic use: because of the quality and thickness of the rubl and the toughness of the fabric. That’s why manufacturers of such leadir bicycles as Columbia, Dayton, Emblem, Excelsio: Harley-Davidson, Indian, Iver Johnson, Miar Pierce, and Yale use Vitalic Tires as regular equi ment on their better-grade wheels. The price of Vitalic Tires is a little higher tl that of other tires; but the cost, figured on mileag is farlower. And that’s what counts, fellows. ( b / Ask your dealer to show you a Vitalic Ti oF Then put the proposition up to dad Some Inside Information All Vitalic Tires are made with an extra-strong 14' ounce fabric. The strongest fabric used in most bicyc! tires is 12-ounce—and as a rule bicycle tire fabri are even lighter. Here is a magnified cross-section of 14'.-ounce Vitalic fabric compared with an equal magnified cross-section of 12-ounce fabric. CONTINENTAL RUBBER WORKS Tougher, Than Erie, Pa. Elephant Hi 7 bb AX 4 a | 4\ N A | i , | | 4 Please Mention Poputa Vechanics

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POPULAR MECHANICS ADVERTISING SECTION 141 The Thrill of a Life-time s Trade-Marh hb our Reputation Go where the water sparkles and ripples in sunshine and Buy a bicycle sorv— and be particular, Buy a Dayton idow—go where a tug on your line sends a thrill from Bicycle, the acknowledged leader— backed by 25 years ead to toe—go wheny will—and where you will— , ‘ - m go . yee : go y experience, skill and reputation. your bicycle is ready, waiting and willing. : ‘ Sit dea Write today for your dealer’s name and a copy of our Get out your rod and tackle-box—and hop to it! Swift, ' oe N ‘ ' ht 1 . +s ndsome catalog No. 45, showing 8 splendid new 2 lorious flight, combining both comfort and health! A andsome cata ee ee 8 splendid new 1920 cycle saves time and money, too— and will help you Dayton models for men, women, boys and girls. Learn . ork as well as ‘*p'ay.”” what a Dayton Bicycle will do for you. Cycle Dept., THE DAVIS SEWING MACHINE CO., Dayton, Ohio > »l 2 Ride a icyc Please Mention Popular Mechanics

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POPULAR MECHANICS ADVERTISING SECTION Deserved Admiration EN who work with micrometer and gauge, whose minds think only of doing a job right, were the first to appreciate just how much the Briggs & Stratton engineers accomplished in de- . veloping the Motor Wheel. hia adhe meee Gallons Its broad intrinsic worth is recog- performer. Always ready to go the nized, not by any one feature, or route, to make the hill, to carry the invention, or principle, but by some- burden, to get there and back—in thing far greater — the successful short, todo more than could reason- blending of all practical elements apniy pe expected of it. into one complete, dependable, re- . sponsive, economical means of trans- The booklet ‘‘Motor Wheel and portation available to every one. Flyer’*sajll prove of particular inter- Naturally it is the concurrence of ¢St to men who are mechanically opinion amongst those who own and_ inclined. It fully describes the Motor ride the Briggs & Stratton Motor Wheel and the Briggs & Stratton Wheel, that it is a mighty consistent Flyer as well. It is mailed gratis. BRIGGS -STRATTON MOTOR WHEEL BRIGGS & STRATTON COMPANY- MOTOR WHEEL DIVISION GENERAL OFFICES AND WORKS — MILWAUKEE WIS N SI

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POPULAR MECHANICS ADVERTISING SECTION NAVY SALE OF SEAPLANES } A large quantity of seaplanes, spare parts and accessories are offered for sale by the NAVY at fixed prices. This is an unusual opportunity and should be given careful consideration by everyone who is interested in aviation. Planes Are New—Never Have Been Flown 2° "0s! of them are stil crated as received from the mal They have been well taken care of and are in excellent condition. We advise imme- n, as orders will be accepted and filled in the order in which oe are received. The following are offered He -2-L Tyee © Flying Boats—pusher bi- H-16 Type Flying Boats tract: rt F-S-L Tepe, Fiying Geate essentia engine of BOO H. P plane two Liberty engines of 30 H ? same H larger “ Unwer nls e) 74 ft.. total each—wing spread 95 ft total wing spre 5104 ft tal rea l 17 aq surfaceS0S sq. ft muximum surface 1,164 «aq. ft maximum speed maximum speed of S7 miles per |} ir les per hour 95 miles per hour, Sale price, $11,083 Sale price $12,400 Doveniesteces ..$6,160 Aecromarine Type 39-B Seaplane ()ivc- - Model 40 Flying Boats push erbiplane tured above tractor biplane—Curtiss Boeing ‘Seaplanes tractor biplane Curtiss 100 H. P gine—wing 100 H. P. engine—wing epread 47 ft one ill-Seott 100 H. P. engine—wing approx. 48 ft total srea 504 sq total area 494 6. ft maximum speed spread 441 total w g aren 495 8 ft rin am speed of 70 & les per hr 42 miles per hour Sale price...$3,000 maa um speed of 73 miles per hour Sele IGE cnseccccxcdecsonanies $4, 000) This we consider our best buy. Endorsed (H!C DENCO. cece cceemeeeeereee -+- $2,000 Curtiss Gnome Speed Scouts — com eat r ited seaplane \ munuta, Type “R” Kite Balleons— Used for 1 ew th Gn me engine netalled turer is marketi ng a set of wi sand observation and instruction purposes Never flown. Packed in original cases id w substituted f ¢ P Towed by vessels and also flow fron e price sbbeseesecins a6eneees $2,000 converts tl into a successful land plane land, Sale price...... ° ; $2,500 Those who follow aerial affairs closely, no doubt noticed a recent newspaper item which told of a record breaking flight from Miami, Fla., to Bemini, Bahama Islands, by a seaplane, carrying sixteen and baggage. The plane making this record was a type H-16 flying boat (lot 2) purchased from the NAVY and was riginally designed to carry four persons. The sketch shows how it ) was converted to carry SIXTEEN PERSONS AND BAGGAGE at a cost of about $1,000 for the necessary alterations. You can do the same % Of Purchase Price Buys a Plane #i*:*cce8sy feck rder, with your order, and the goods are yours, subject, of course, to prior sale Ty 1s dupacit can be by certified eck or money order drawn to the order of the Paymaster General of the Navy, or the bond of a surety compan) acceptable as sureties on Federal Bonds. The balance shall be paid within 30 days after acceptance of your order. Eagenes and Spare Parts Sette to rien ths NAVY & cfering o number of g p sets of spare parts, at fixed prices, which can be p ears ith or pape del sre ne ENGINES, new and used, are offered in an astonishing assortment and at prices equ: nishing. The list includes Renault, Hall-Scott, Curtiss V-2, Isotta-Fraschini, Sturtevant, Curtiss OX and OXX. Gnome, Fiat and the Liberty. The prices range from 175 to 2000 dollars according to make and conditi ne Order from This Announcement and Avoid Disappointment ‘°v°"s! !°'sinceces® the sale at the start are completely sold out, several times as many orders being received as there were planes for sale Order will be attended to in rotation as they come in, so we advise ordering from the descriptions given above Sut for those who re additional information the NAVY has prepared a beautifully illustrated cat slogue which will be sent fre “ United States Navy ““anaAccouns Washington, D. ¢.

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POPULAR MECHANICS ADVERTISING SECTION Bicycles Are Like Autos [' When It Comes To Tires ||} MAGINE a high-priced, high-class car with shoddy, weak- bodied tires. It would be out of the running in a hurry,’ ) May | wouldn’t it? ) i The better the car the more careful the owner is about the tires. tif | The makers of U. S. Bicycle Tires have at stake the same U. S. | | | . -—~ TPGo-o, = a er — Tire reputation that car owners and truck owners rely upon. All the resources, men and equipment of the United States Rubber Company, oldest and largest in the world, stand back of your U.S. Bicycle Tire investment. Nine different styles, both clincher and single tube. Choose the tread that suits you best. If you want to know about the rubber that goes into U. S. Bicycle Tires, write for a copy of the graphically illustrated and fascinatingly written book, **Rubber—A Wonder Scory.” Ad- dress U.S. Rubber Company, Bicycle Tire Division, New York. **Ride a —— Bicycle’’ United States Tires United States Rubber Company Please Vention Pop la Vechani«

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POPULAR MECHANICS ADVERTISING SECTION What 1s Happiness? Morethan anything—it is health, the heritage of nature. It is impossible to estimate how much the bicycle has con- tributed to the happiness of America. It is the ‘‘Open Sesame’’ to a world of healthful delights. It is the magic tonic that has built the foundations of health and character for millions. Itisthe most pleasant form of exhilarating exercise. ‘Thousands of men and women ride bicycles for convenience, pleasure, health and economy. Toown a bicycle is the one big desire in the heart of every girl and boy. It means the most perfect of all happiness to them. Be happy, Qjde ¢, Bicycle See your dealer today ; CYCLE TRADES OF AMERICA, Inc War

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146 POPULAR MECHANICS ADVERTISING SECTION Akron-Williams Tire Repair Equipment is preferred Equipment for Self-Contained a better tire repairs oo Because we have always built the best possible ecvip- 33SGTV20 ment is the reason that the largest tire factories and tire repair shops in America have used Akron-W’illiams products consistently. We have specialized in this work. Our engineers are constantly studying and developing new equipment that best meets the needs of the industry. The recent A-W developments in tire repair equipment are significant of the alertness of our organization to improve and adapt the most up-to-date features of con- struction to make even the smallest vulcanizing outht meet every requirement of the professional repair man. If you are thinking of establishing or enlarging a tire- repair business consult us. Long years of experience in building better equipment places us in a position to advise you correctly. We will be glad to co-operate. The Williams Foundry & Machine Co. Self-contained Steam Akron, Ohio, U. S. A. Generating Tube Vulcanizer Everything for the Tire Builder and Repair Man Type 33SGTV20 8-bar plate, size 8x20 inches. Tu- bular boiler construction, gas or gasoline burners. Sturdy con struction insures best of service and long use. Aw Self-contained Steam Generating Tube Vulcanizer Type 33SGTV36 Self-Contained Steam Generating Vulcanizer 33SGTV36 6 bar, plate size 8x36 inches, tubu- lar steel boiler, gas or gasoline burners, steam gauge, filling fun- nel and valve, safety valve, com- pletely assembled.

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. 8 = ~ Reed ——- ene 1

POPULAR MECHANICS ADVERTISING SECTION

New With only one coat of Glidden Auto Finish you can make your car look like new. The operation is a simple one, in less than 48 hours you'll be driving again. Your car will be ready, for another years use. It will have a rich brilliant finish that will give you lasting satisfaction. Glidden Auto Finish is one of many kinds of Glidden Paints, Varnishes, Stains, Enamels, all of which find practical use about the home and farm. under the Glidden Label. nearest dealer. THE GLIDDEN COMPANY National Headquarters Cleveland, O. Stocks in principal cities

Factories: C leveland, Chicago,San F rancisco, Read- ing, New Orleans, St. Louis, Brooklyn, St. Paul, Toronto. Branches: New York,Chicago, Kansas City, Detroit, Boston, Pittsburgh, London, Atlanta, Dallas, Des Moines, Montreal.

Whenever you need painting material of any kind you'll find just the right thing Go to the

Everywhere on Everything

A A CEN AE AT AER TB RE EA A NE li eats ati

Please Mention Popular Mechanics

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POPULAR MECHANICS ADVERTISING SECTION

Suppose you were going to ride in a race—

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Wouldn’t you insist that every piece of equip- ment be just as sturdy, just as tough, as is possible to buy? Naturally you would, for at race speed, you safety, your chance of winning, your life, de- pend on the dependability of the equipment. With this in mind, note that a great majority of races have been won on Goodyear Tires. The riders know them to be dependable. At motorcycle dealers’ ask for Goodye ‘rs with the All-Weather Tread, for machine and side car. These are the same identical type the riders use in road endurance races.

Please Vention Ponular Vechanics

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POPULAR MECHANICS ADVERTISING SECTION 149 ! 4 Z 2 Both can be had but their achievement rests solely with your ability to recognize your chance and “Act upon it.” This i is an age of business enterprise. The Vander pool method offers great opportunities for getting into a business for yourself. The Vanderpool method makes it easy for you to get into business for yourself. You furnish the “WILL TO DO IT” and with a few weeks of our free course of “HOME STUDY” and our Tire Re-Building outfits, you can be ready to open up a business in a short time. No question of your getting busi W ° ness. Many Tire re-builders are working day and night. rite for Free af Think! Men : 37,500,000 Tires wearing out; the /llustrated Booklet ” Vanderpool method makes it easy it will for you to learn right at home without interfering with . fae oe started right away: it vour regular work; it starts you right, teaches you how to v ou only a two cent stamp ¢ , . nd will easily make thousands of | use the Vanderpool equipment, opens up vast opportunities dollars for yg for a large and growing business. Vanderpool Equipment — Alter 5 years’ experience with most all makes of Vulcanizers, 1 A B fo Ww k bought a Vanderpool and went ear or or into business It is compact and convenient, turns out excellent Vanderpool five cavity wit! greater comp act t work and a lot of it convenience and its Tat est spring improvemer ! ight us mar fa ible mment ! ent} i C. Derr r Ma ire ¢ né equiy é db thi ew we produce THE VANDERPOOL VULCANIZER CO. | Dept. 6F, SPRINGFIELD, OHIO | Please end me vour booklet a | | Addre I cis s

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150 POPULAR MECAIANICS ADVERTISING SECTION LOOK FOR THIS NAME ON THE BLADES OF BETTER SAws AT How You | Pook. + Ga Can Make ~~ Your Work ad SO — Quicker at” *. — Easier | 4 —Better * Try an Atkins AAA Non-Breakable Hack 1] Saw Blade on your next job of metal cutting. | : : . An , a k Do away with brittle, snapping blades. y Saw Boo Atl; Rage Seiiae Sent Get the Atkins tempering in the cutting c- : berved — 4 ’ ~ . - se Valuadie DOOKS describe a 1 edge. You'll find this special blade cuts ules pan alatenahion aheut exon? Se ae See. want—write yournameon thet Remember— Atkins provides the best of hack saw gin of this page and mail it to | frames as well as KWIK-KUT Power Hack Saw Ma- ve a, Atkins Metal Saws’” — chines, Metal Cutting Band Saws and every improved ee omens Eeoceenpe machine and saw for metal cutting. Big industries use ** Atkins Hack Saw Chart’ them. Write for the folder telling you the details. Atkins Cross Cut Saws'' ** Silver Steel Drag Saws’’ “* Atkins Mill Saws’ I h ! : ane cong 2 Prove It—On the Job! ~ Aghios, Rectine Gives “*The Story of Silver Steel’ Send your name and address and 10c in stamps. “The ee a We will send you an Atkins AAA Non-Breakable Hack ** Saws in the Filing Room’ Saw Blade (8- or 10-inch). Try it. If it isn’t the best blade you ever used—we'll send your money back. — E. C. Atkins & Co., Ine., (iss:) Indianapolis, U.S. A. Makers of Silver Steel Saws and Tools ; Automobile Clutch Discs ; Meat Slicer Belt Splitting, Cigarette and Tobacco Knives; Cabinet Scrapers and Specialties Canadian Factory: Hamilton, Ont.; Machine Knife Faciory: Lancaster, N. ) Branches in New York, Chicago, Memphis, New Orleans, Atlanta, Minneapo! Seattle, San Francisco, Portland, Ore., Vancouver, B.C., Paris, and Sydney, N.S. W At Leading Hardware Dealers — Jobbers and Mill Supply Houses Everywhe

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POPULAR MECHANICS ADVERTISING SECTION 151 MORE. MILEAGE a hod Cut Your Tire Cost in Half | Double tire mileage. Prevent punctures and f blowouts. Insyde Tyres are inner armor for s automobile tires. Thousands in use, tremen- dous demand due to high cost of tire casings. We Want Distributors Everywhere Devote all or your spare time F. X. A. sold $143 worth in two hours. C. T. B. sold 40 tyres in 4 hours, $100 worth daily salesis easy. Best agency proposition on market today. Guaranteed sales or goods may be returned. Norisk but big oppor tunity to anyone who wants to make real money quickly—territory free. Write your name carefully on the coupon below and mail at once for full details about proposition—FREE THE AMERICAN AUTOMOBILE ACCESSORIES CO. “& Dept.242 CINCINNATI, OHIO

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152 POPULAR MECHANICS ADVERTISING SECTION The foreman Says : *T suppose it’s because I used them myself when I was at the bench, but it does seem as though the best men in the shop have a prefer- ence for Starrett Tools. ‘Of course, most of them sort of got into the habit of relying on Star- rett for fine work when they were apprentices and journeymen. ‘‘Speaking of apprentices — that little red book there, ‘The Starrett Book for Machinists’ Apprentices,’ has saved me more time and helped more young fellows to learn how to do things right than anything else in the shop. ‘‘When a young lad asks me how to do this or that, [ usually tell him or show him, and then ask him if he has one of those books. I’ve noticed that as soon as he gets one of them he doesn’t have half so many questions to ask. ‘‘Starrett gets out another book, ‘The Machinists’ Data Book,’ that’s just about as big a help to the experienced machinist. It’s got all the tables and formulas and so on that he ever needs, and it isn’t cluttered up with a lot of engineers’ stuff that he doesn’t use. ‘Yes, I bought one of each of the books down at the hardware store, as soon as they came out. They cost me seventy-five cents each, but they’re worth it.” The L. S. STARRETT COMPANY THE WORLD'S GREATEST TOOLMAKERS Manufacturers of Hack Saws Unexcelled ATHOL, MASS. Machinists the world over have put their faith in the accuracy of Starrett Tools for thirty-nine yeam. Write for illustrated Catalog No. 21 “AP”

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PUPUJ..AF MECHANICS ADVERTISING SECTION 153 } | j ars CREAT: - dame | SNS) : Dae | | that Means So Much to You in Time-keeping Accuracy You will note in the illustrations above HE time-keeping accuracy of any watch depends absolutely upon that Waltham makes the Staff in two the trueness (in the flat and round ) eggs One a perfectly groynd steel of the Balance Wheel. ub which is riveted to the Balance This trueness depends largely upon the Wheel and is an integral part thereof. mechanical precision with which the The Staff (you will note) has an accu- Balance Staff is riveted to the Balance ately ground tapered shoulder which Wheel Yermits of its being driven to its exact seat and I h. : , located accurately to the ground steel hub. a = > ords, 7 if the Any layman can understand that, if his watch is Ba ance Staff is not dropped or has a severe shock, the result will be firmly and truly located a broken or bent Balance Staff, therefore requir in its hub. the balance ing repairs in this important unit. which can be withdrawn easily from the hub becomes eccentric or ila. wobbly in its action, which immediately affects the time-keeping quality of the watch. How important, then, is this exclusive develop- ment of the Waltham Scientific Detachable Balance Staff. Herein Waltham disregards the ordinary method of mak- ing the Balance Staff act without affecting the original, perfect assembly of the Balance Wheel assures him of continued accurate time-keeping and service from his watch On the other hand, when the ordinary Balance Staff is driven out of the Balance Arm for repair or replacement, the distorts the metal. riveted part roughens and Therefore, the original aperture in the Balance Arm has been more or less destroyed, and when the new Staff is firted, the watch repairer must rivet er enough of the metal to secure the Staff, which distorts t Balance Arm and throws the Balance Wheel out of true and po: The Waltham Scientific Balance Staff insures sim- plicity of repair and the original time-keeping quality of your watch. as both axle and hub to This is yet another reason why your watch selec the wheel. tion should be a Waltham. The Vanguard The World’s Finest Railroad Watch 23 and 19 jewels This story is continued in a beautiful booklet in which you will find a liberal watch education $79 and up Sent free upon request. Waltham Watch Company, Waltham, Mass. ALTHAM THE WORLD'S WATCH OVER TIME Please Mention Popula Vechani«

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POPULAR MECHANICS Herman Style 223 Modification of Army Last Gun Metal Calf with Mat Top OGCCERRRERGGeR ORR HetERaEEtOCteS beens pecseeenenceat PODOLOROROODOLERGRERRLESEERORRAeeeaaceeeceeeeeeeecceceaeaesanete pOADODGGORDGROGRRGEARHenOceesneRoaetee peaseee peceeeanceneese peenenaneanucan i : ERMAN’S U.S. Army Shoes, 23 built on the famous Munson = Last, are the finest examples of comfort with shapeliness. Army models in Herman’s Shoes. peceeneeanenencceaans Sold in 8,000 retail stores.’ If you are not near one, we will fit you correctly and quickly through our MAIL ORDER DEP’T at Boston pocnenccauccnens TITTTIN H JOS. M. HERMAN SHOE CO. : 8o1 Albany Bidg. : BOSTON, MASS. For business and all forms of general outdoor wear, Herman’s Shoes, built of the best leathers, have an excellence recognized : everywhere. i There are over thirty civilian and eaneccsenveccent ° apenas li Lilt paneueneret poueneaevenacecon peaete unnecnancsecicccoer pecnect DL peneeccgoocens pocccegnenocncccccce i re ST * si sf You can make big money because the A hundred different kinds of brushes for homes. hospitals, public build- need of our goods is t! ings.garages, barber shops,etc. Splendid sales helps and fine sample cases free to salespeople. Uni plan of gaining entrance to by invitation Credit to relia’ people Learn about the best line sold direct to the user the big line of everyday, useful home goods! BIG COMMISSIONS AND PROTECTED TERRITORY NORTH RIDGE BRUSH CO. Box 35 FREEPORT,ILL. Please Vention Popula Vechanics ADVERTISING SECTION MONARCH LATHES UALITY construction and workmanshi; Accuracy in operation and the ability t perform the same high class work as that of the more costly tool has established the leadershi; of the monarch line. Quantity production of a high grade machine tox has made possible the low pnces that place th: MONARCH lathes within the reach of every large or small purchaser. Made up to 30” swing, there is a Monarch lathe t do your work. Every one guaranteed to give satisfac tion to the purchaser. Write for catalog No. 11. America’s Largest Lathe Builders The Monarch Machine Tool Co. 100 Oak Street Sidney, Ohio, Zs LEE UNION-ALLS THE MOST POPULAR WORK GARMENT IN AMERICA | Do away with that old fashioned report, and the disturbance Avoid flinching, improve your accuracy and enjoy precision shooting anywhere at any time with a MAXIM SILENCER 1 6c in stamps for nd } n t Maxim Silencer Co. 93 Homestead Ave., Hartford, Conn.

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POPULAR MECHANICS ADVERTISING SECTION

> Th ) . y A Sy. _~oOODI0"? on K oo - gin, OY > ns - n tee My = Sy. Wai 2 - = eTA $ fas = HW ay, Ps | Full Prices Sor Diamonds, « sen ~~ may’ at, , ~ _¥ = . bs Ge = “Aw “ans << uy, a, Mw sous mat Blancad Bargains in 75 Years Never in nearly 34 of a century business existence have we offered such amazing bargains in diamonds as against , prevailing prices. This diamond banking house, rated at more than $1,000,000.00 lends money on high grade jewels. When the money is not repaid the security must be sold regardless «f market value nus" +» a are forcing us to dispose of hundreds of thousands of dollars worth of jewels at bar, Try to Match at Full 60% More! Here you can get diamonds at wonderful savings proved by customers’ letters. Diamonds which origina!ly sold at full prices. The exact qualities for which full prices are paid today. Any new mounting you prefer. Try to match it at full 60% more.

Diamonds bought here are like insurance pol. Guaranteed Cash Loans ‘ier? kom nat'ron oo horror batons Sa deci: de to buy—see our Cash Back Guarantees. Sent on Approval! We will be glad to send you, prepaid, on approval, and without obligation, any of our bargains for free ex- amination. See them for yourself before you buy. Send At Once for Jos. DeRoy Bulletin WFerent trom the ordinary catalog. Hundreds of special bargains listed Write for it today Not jest one quality of diamonds, but all qualities are shown this remarkable bulletin. Your name and address on the cou pon is enough. Don't —send the coupon now. Jos. DeRoy & Sons 22) Opposite ostoneyoucne nat ba:

Jos. DeRoy & Sons 1963 DeRoy Bidg., Pittsburgh,Pa. Gentlemen:—Please send me, absolutely free and prepaid, your new Bargain det of diamonds, watches and other jewelry. It is distinctly uo stood that I assume do obligations of any kind.

f nial } () IGRAL SHOES’ FOR ALL THE FAMILY WE FURNISH THORO PLANS and INSTRUCTIONS . pas Shoes ‘ wear € th Caving f $it

Sesame cnr seer BOND SHOE ia ate Sept. 372. rear (v0 coag nn ono: every Motor, tonear and mis Ss part ont ket as hy ag ane e sega grade Cabinets. 1 re 7 WE SELL NO CLOTHES BUT SAVE YOU MONEY ATKINSON PHONOGRAPH = EQUIPMENT | Se. . OUR WONDERFUL SIMPLE rr! Buildin ark an eS erect Dito sonbnenn : RENOVATING PROCESS APPLIED AT HOMF

"When theDoor Bell Rings || MAKES OLD CLOTHES NEW Provides You With Clean, Fresh, Nicely Proceed Garments ° ‘ ‘ Each Morning — : wv starte you in a r at nsines It is when the door-bell fails to ring because of Woe have tare than aaceseat practical weak or worn-out batteries, and your friends : . - tes feel that you ‘saw them first’ that trouble and Money -Saving and Money -Making Specialties

humiliation confront you. With the install- Lead eed Senet Sutare on ation of The Atherton Low Voltage Transformer Sno Geaeam Gabeie (asel, dik. etc.) Cathe ill chances of the door-bell not ringing are over-—and the The Economy Perfect Figure Developer, buzzers in your office, the children’s electrical toys and any The Economy Anti-Shrink Process, experimental work requiring low voltage may be supplied The Economy Anti-Fade Process, Etc. with the desired amount of current with the aid of this Little SEND 50 CENTS for “Economy and Correct Attire,” \ Wonder. The cost is so slight you cannot afford to continue ette the use of batteries. Send $3.50 and receive transformer money. Immediate Results, I ' iress, postpaid, or write for descriptive « ‘ircular and full particulars. ECONOMY EDUCATOR CORPORATION. ee: 47 7 2825.2837 Broadway C. F. ATHERTON C0., Dept. 15, 184 W. Weshineten St., sacnte, Ueleeman nnd Bidsies Gaeaeers Weaked CHICAGO, pe

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156 POPULAR MECHANICS ADVERTISING SECTION SOS ee onirrinen . * That amount of business in one day making and selling popcorn Crispettes with this machine. Profits $269.00. Mullen of East Liberty bought two outfits recently. Feb. 2 said ready for third. J.R Bert, Ala.,wrote Jan.23, 1920. “Only thing I ever bought equaled advertisement.” J. M. Pattilo, Ocala, wrote Feb. 2, 1920, “Inclosed find money order to pay all my notes. Getting along fine. Crispette business all you claim and then some.” John W.Culp,So. Carolina, writes, “Everything is going lovely—business is growing by leaps and bounds. The business section of this town covers two blocks lying everywhere.” It’s a aa old world after all. Kellog $700 ahead end of second week. \lex'- ner, Baltimore, one day. Perrin, $380 in one day. Baker, 3,000 packages one da

$250 in WE » Start You in Business Little cupitai, Teach you secret formula. no experience BUILD A BUSINESS OF YOUR OWN The demand for crispettes is enormous. A delicious food con- fection made without —_ ir. Write me. Get facts about an honorable business which will make you indeper ident. You can start right in your owntown. Business will grow. You won’t be scrambling and crowding fora job. You will have made your own place. PROFITS $1000 A MONTH EASILY POSSIBLE For full particulars send post card for book shown below It’s free. Do it now. LONG EAKINS CO. 1496 High St., Springfield, O.

Kentucky Homespun, Pure Natural Leaf, Kentucky’s Finest. OBAC C0 SEND 10c FOR SAMPLE J. H. WILSON TOBACCO CO.., Box 464, Mayfield, Kentucky Factory §! PRICE DIRECT TO YOU This $12 Officer Shoe "EEE. $689 89 First Grade— The Factory Price — Direct to you at only The retail og of this shoe is $12.00 is made of the best waterproof om ml calf leather. Guaranteed to give the best wear. If these shoesare not just as we say, send them back. You don't lose a cent.

If you are sending money order or check, do not include postage. Pay only $6.89 for shoes. We pay postage. State size. These shoes are built to be good for work and dress at the same time. U. S. NATIONAL ARMY SHOE Co. Dept. 824 WESTFIELD, MASS.

Build your own wheel toys Fun! You can certainly have it with these crackerjack Outdoor W he Toy outtits of mine. With on] screw r drive rand awrench for tools ou can build almost every kind « an outdoor toy with wheels. Strong speedy gliders, coasters, wagons speedsters, trucks—some z ne The popular $10 set ap aeers week mnie eat in Canada). Other sets $6.50 an s18 ($8 Tan Gilbert outdoor wheel toy Each wheel toy outfit contains a set of real steel disc wheels — the finest and strongest kin of wheels axles, plates, bars, seat, angle trons, nuts and bolts. It's very easy to put them together. Write t py of my boys’ mont day fora Boys’ Magazine ae Se og pe len, ot I send you my nplete Gilbert Toy casio, t PR, Samoa FH rt Engineering I f< THE A. C. GILBERT COMPANY 104 Blatchley Ave. New Haven, Conn.

| BOURQUIN TUBE PE SEIN ONE IN ONE Interchangeable and adjustable. Fits an. For Ruling pen holder—constant adjustingand refilling Tracing | ” “ Lettering | | dispensed with. The Draftsman’s Dream. Drawing . Price $3.00. Agents Wanted. Numbering ! SPAULDING-MOSS CO. | 42 Franklin Street BOSTON

“Lighting Fixtures” READY TO HANG (Direct from Manufacturers) Completely wired, including glass fA ware. New designs. Send for ' catalogue No. 18 ‘ ERIE FIXTURE SUPPLY CO. | STA. A. ERIE, PA. |

as low as $5.00 a ng Hear the ophone right in your own home. It plays all records. Write for our catalogue. THE ARTOPHONE Co. Dept. 40 1113 Olive St., St. Louis, Mo.

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POPULAR MECHANICS ADVERTISING SECTION “END your name and address and we will send you our S 28-page book of diamond bargains. It is the result of nearly 100 years’ experience and shows you miilions «f llare’ worth of jeweiry to choose from-—and } 4 may be paid for at the rate of only a few cents a day. No Money Down The diamond you séleet will be sent agen your simple re- est-- without a penny down. Then if you do not think the greatest bargain you have ever seen, sendit back at r expense. If you decide to keep it, your credit is good, 8% Yearly Dividends You are guaranteed an 8 per cent yearly increase in 2c on all exchan . You can also earn a 6 per cent sus. The book tells how. Write Toda your neme and address today- Low. You will be er no obligation. You will receive our 128-page di x by the next mail, Send your name and address NOW to Dept. 3! of MLYON & CO 1 Maiden Lane, New York, N. ¥ GET THIS SUIT » your own measure. It won't cost you one single cent. All we | 1 to do is take a few orders for brated made to measure i é Show the suit to vour friends. ¢ be abig advertisement for us. {| You can easily make from $35 to $50 EXTRA besides that be the best dressed man in town Itsa portunit u annot t er vk Even if you only want to urself, don't fail t WRITE FOR our BIG OFFER yam ite Drop usa line or send us ! post « ard. and we will se ad you, (FREE, i € k ning " W rite NOW. THE PROGRESS TAILORING co. i Bargain Book Contains many pictures of things you want at remarkably low prices. Sporting goods, automobile accessories, fishing #uy plies, tools and cutlery, firearma, toys and games, novelties ele trical goods, cameras and photo supplies, things for grown 4, sportsamen, mechanics, electricians, folks young or old Write today for your Free Copy of this illustrated Bargain Book and your name will be put on our permanent mailing list BALTIMORE MAIL ORDER COMPANY Dept. 144 Baltimore & Howard Sts., BALTIMORE. MD. 500 a for TWO HOURS WORK It was in answer toa request from the Chief of Police that Warren Biglow, the Finger Print Expert, arrived at the scene of the daring robbery of the T O—— Company offices. The jobwas undoubtedly the work of skilled cracksmen and robbers of uncommon nerve. $6,500 in currency—the company pay- roll—was gone, Not a single apparent clue had been found by the police. Almost immediately after his arrival Biglow turned his attention toa heavy table which had been tipped up on its side Examination of the glossy mahogany showed an excellent set of finger prints. The thief might st as well have left his calling card. To make a long story short his prints were photographed and taken to Central Office, where they were matched with those of “Big Joe Moran, a safe blower well known to the police. Moran was subsequently caught and convicted on Biglow’s testimony and finger-print proof. Most of the money was recovered. In the meantime the 7 O—— Company had offered a $500 reward, which was given to Biglow—his pay for two hours’ work Be a Finger-Print Expert Learn at Home in Spare Time Could you imagine more fascinating work than this? Often lifeand deathdepend upon the decisionsof finger-printevidence and big rewards goto the EXPERT Thousand f trained men are now needed in this great field rhe tinger-print work of governments, corporatior pohce departments, detective agencies and individua's has created a new profession Many experts regularly earn from $2,000 to $5,000 a year in this fas cinating game And now you can easily learn the secrets of this new Science in your spare time at home \ man with = mon school education and average ability can become a inger Print Expert in a surprisingly short tin F R EE Finger-Print Outfit and Large naarpantrnged Book ited time weare making a special f a com m.. eit mero nger Print outfitabsolute free and alsoa Free Course in Secret Ses elnte yence, Mastery of thesetwo kindred professions will open a brilliant career for you Wr te ekly for fully illus explains this wonderf | xpired sted free hook on Finger Prints whict ] training in detail Don't wait ur iil the coupon now You may never see this announcement again! Address UNIVERSITY OF APPLIED SCIENCE Dept. A-919 1920 Sunnyside Avenue, Chicago, IIL. SSSSSSSSSSSSSSSSSSSSSSSSSSSSSHSSSSESESESEEESEEEET HESS EERE eee UNIVERSITY OF APPLIED SCIENCE Dept. A-919, 1920 Sunnyside Ave., Chicago, Ill this offer has « Gentlen Wit wut ' ‘ t ‘ . i . « ed, FREE I ‘ Te ‘ ‘ . ers t NAMI \ AD SS rows STA

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158 POPULAR MECHANICS ADVERTISING SECTION THE HOME DESK FOR LEISURE AND WORKING HOURS The ‘““Buddie”’ Desk is more than a sturdy, attractive, com- pact, convenient piece of home furniture. It’s a real com- panion and friend toany man or woman who reads, writes or studies at home. You can work with Buddie for hours with- out eye strain or back strain because ““Buddie”’ is designed to help you sit in the easiest, most comfortable and correct posi- tion and because “Buddie’’ can be moved anywhere as easily as an ordinary chair, you can always have just the right light on your work. Therefore, “Buddie’’ guards against eye strain and insures correct posture. The desk top is adjustable for height, also tilts from level.to a 45 degree angle, 80 when you write, re vad or draw *Buddie’s’’ top not only can be tilted to the right angle, but also moves in closer or pushes further away to accommodate you. Your envelopes, paper Ye Carat........$154 | 34 Carat......... $66 4g Carat........ 110 | % Carat......... 44 12 Carat........ 88 | % Carat......... 22 pens, reference books, ever\ thing are right at hand in the big 2 woe $352 drawer under the seat. Furthermore, “Buddie” can be used at odd times for Telephone or Typewriter desk. Ask Your Dealer or Write for Free Catalog and r Find Qut How and Why ‘‘ Buddie"’ Can Help You If von have children, remember there’s a Buddie to fit every child from three hese diamonds are wonderful values and are cut with years uy “Buddie” gives them a La ad to make them k larger Kemarkable « lor —br place of their very own in the shapp. Your money refunded if you in duplicate our offer family circle Enables them t cent less t ble our price Buy a diamond tod a play games or study ‘yvithout t low you FU LL ‘AMOU NT vu paid for it, in making an ex \ \ straining their eyes or .. for a better one. \ ing their backs Au ithe Order from this ad ~ Yo" rev no risk—everything ox on child welfare recomu ‘ as represented. You can wear one of \ the use of “Buddie” in “the our diamonds a year and return it and get your money back homes as correct posture Satisfaction guaranteed always Fort years’ honorable is of such vital importance | nes back up our statements Order now diamonds are safe If u want a “‘Buddie investments constantly advance Save mone Order today fora child, tell us the age from this ad! Sent on approy il Ww ithout any money or referer fl Regeusies youwrite | Send for bargain catalog ~ Full of surprises, ring Moulthrop ewelry atremarkably cut prices. Getit—it’s free. “Buddie’’ DeskCo. | B- GUTTER & SONS, Wholesale Jewelers 132 Jay St., Rochester, N. Y. (Est. 1879) 170 Nassau St. Div. 69, NEW YORK, N.Y. | Especially adaptable for 1. C. $., Alexander | Hamilton and other home study courses. | EF] | Write quick for samples of Zanol Soft Drink extracts. All flavors. Orangeade, Cherry, Grape, etc. FREE er Not sold in stores. Sellsin as 0 a every home. Wonderful / Containing complete demand. Made at home ¥ story of the origin and history of that wonderfulinstru- ment—the In a minute. No tax to pay. Costs less than one asy 0 ay cent a glass. ( Ss | Make $200 a Month » DF AY > Greatest Agents’ proposition Age ~ ee . in years. Roberts made over’ rq 2 | $200 last month. He writes: ‘‘I sell in almost every home. Prohibition will double my income.” Easy seller A big repeater. Take orders every day. Steady income. } Hundreds of our Agents making big success. Territory | going fast. Write quick for agency and samples. u can learn to play the sca American Products Co.,2139American Bidg., Cincinnati, 0. Practice, and soon be playing popular airs. You . | ean double your income, your pleasure. and your . Airplanes sei compicte rowdy to tly trom popularity. Easy to pay by our easy payment plan. o makeM No. 17 (price $3.00), whieh includes } This book tells you when to use Saxophone singly, in quartett lar band; how o> te an J se fr and many other things you w« rinreg stre al p arts MAKES AN IDEAL PRESENT »rints, wood, metals, rubber and special tools essary. Send for this set quic my and Make Money Making UmakeM Flying Airt Send for free Saxophogg books and og of Truee for sale. Enormous demand. Profits big Co mpleted Plane sells at $10 and car Tone Band Lostruments = wane ¢ | made in 6 hours from UmakeM No. 17 S Ask about our 40 other UmakeM | ets for making Af s oo, We r Scre B U ESC H ER BAND INSTRUMENT COMPA | ee Tee | ed Toys, Novelties, ‘Ww orkbenches and practical 70 Jackson Street. ART. WO. W. R. PRICE, Inc., Dept.7, UmakeM Bidg., 127 Sth Ave., New York SSE WMNNNNMAANNUINNINNINESN SAULT SHEAR You Take No Risk This Razor is GUARANTEED FOR LIFE This Shumate “Barber™ razor is so good that we dare guarantee it to you for /i/e. © Here’s the reason—the blade is made from Tungsten Alloy Steel, which takes a keener edge than any ordinary steel cam—and it holds it. You can use it for years without honing. The secret of this worderful steel is ours =, alene, and we guard it jealously. Here's our unqualified guarantee: Buy a Shumate “Barber™ razor and use it—not once, but as long as you like. If you say after an exacting trial that you don’t like it, we'll exchange it without a word. $ To settle the razor question for life, send us $2.00 and the SHUMATE Barber razor willbe sent to you post paid. For those with Very strong Wiry beards, we recommend our $3.00 SHUMATE razor, specially ground for this purpose In remitting, give us your dealer’s name, and a chamois lined, rust- proof case will be included with your razor. = Established 1884 SHUMATE RAZOR CO. 841 Chestnut Street, ST. LOUIS, U.S.A. ae ll Capacity 10,000 Razors Daily)\j\}}\}\\)iii!\!///S))MIII//{) NINN aS

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PO?ULAR MECHANICS ADVERTISING SECTION 15% OODELL-PRATT Fefole mere fe) Dus 1010) On: L Polishing and Grinding Heads The Goodell-Pratt line of these A number of these Polishing useful devices is so varied that it Heads are furnished with three meets the needsofall. The Frames jawed Chucks, which greatly in are of iron and are hollow, thus’. crease their usefulness. giving great strength with light All iron parts are finished in red weight. The Spindle and Collars and black enamel and all steel parts are lathe-turned to insure smooth, are polished. ACCUTANE TURIN. The same superior quality which All sizes of these machines are at once distinguishes the 1500 tools provided with adjustable of the Goodell-Pratt line is boxes. The pulleys will take flat belts, and the smaller- sized pulleys are grooved so that round belts may also be used. built right into these polish ing and grinding Heads. I: design, materials and work- manship they are everything one could hope for. Write for a more complete descriptior r for a free pocket-edition catalog of the 1500 Goodell-Pratt Tool GOODELL-PRATT COMPANY Are

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160 POPULAR MECHANICS ADVERTISING SECTION dable pion ws 80% Tractor Equipment ORKING under full load all day, the tractor gives spark plugs their most severe test. Champion Spark Plugs with their famous No. 3450 Insulator are so universally recognized as best for the shock and temperature changes of tractor service that they are factory equipment on 80% ofall tractors built. There is a Champion Spark Plug specially designed for every type of gasoline engine. Order a set from your dealer now. CHAMPION Be sure the name Champion is on the Insulator and the World Trade Mark on the Box. Champion Spark Plug Company, Toledo, Ohio Champion Spark Plug Company, of Canada, Limited, Windsor, Ontario Please Mention Popular Mechanic:

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POPULAR MECHANICS ADVERTISING SECTION 161 meant G6 AND6O |: Both Men Start On One with years of experience to guide him —the other staking his future on what he has today. a school boy from Ohio ambition to own a business of his own. Herbert Williams, fifteen, just a kid, with a man’s grit, wanted to thing in autos” vinced him that Haywood’s complete course and in two weeks was ready to start in a lasting business. Big, honest, Levi Bowles, the school teacher at West Branch, Iowa, disregarded his years—Came to Indianapolis, learned Tire Surgery, and when handed his diploma was prepared to start a business that would earn him from $2,500 to $4,000 per year. TL ee A school teacher from Iowa and B))) Each fired with an d “do some- begged his father—con- Tire Surgery business and money—took the TRESS, ‘, is a definite method by which old, worn out, discarded l\,,0 hia automobile tires are rebuilt, reconstructed and made fit | | | to render four to five thousand more miles of travel id | | } Tire Surgery derives its name from the surgeon-like skill of the operator, who, by Hit HH] he Haywood Method, becomes a master-craftsman } #t Herbert Williams HHI ANYONE CAN LEARN IT ‘4, Better Williams | your guide to a business of your owr—neither youth nor old age are barriers Haywood Equips Tire Repair Stations Complete MINER P wie , . HAYWOOD All the tools and machines used are of special Haywood design, enabling work to be turned out that is up to the Haywood standard of quality =| GET into BUSINESS for YOURSELF Tire Surgery is taught at Indianapolis or by mail. The course prepares you to operate a SURGERY STATION with unfailing skill. It is intelligently explained so that a complete and higher education is unnecessary—Bring to Mr. Haywood an ambitious he-man with a GOOD COMMON SENSE BRAIN, and he will RETURN HIM, a BUSINESS MAN with a MOST WONDER FUL PROFESSION with which TO SUCCEI HAYWOOD’S Silvur Lined Mold popular rib ind rich loo —— produces ae universally tread oth a In appearance Get the Facts. Whether you in business now, or wo king for ‘ one else, you should write and t en my free catalog about Haywe ky Pd lire Surgery— Use the coupon, or write a letter Haywood Tire & P Equipment Co. 752 Capitol Ave., 4 4 PA INDIANAPOLIS, # IND. P4 4a Aon £9 Ple 7K ~ «x x eo A" 4 > es i: »» ase Mention Popular Mechani SK M. HAYWOOD, President “

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162 POPULAR MECHANICS ADVERTISING SECTION YOU can BUILD this PHONOGRAPH easily / TREMENDOUS SAVING IN You don’t need to be a cabinet maker. We have made it an easy and a pleasant job with ° ope We furnish blue prints, diagrams, motor, Our Simplified Plans — built horn, cabinet pieces and all! tal parts complete. You do the assem- bling, 6 models to choose from. A few —_. wove and you will have as fine a type of phonograph asany produced, and ata price away below what you would pay in a store. Keep the Savings in Your Pocket Machines play all records, have a wonderful tonal quality, excelled by none. No need now for any family to be without a phonograph because of the cost. THE MAKAFONE solves the problem. BUILD IT YOURSELF AT LESS THAN ONE-FOURTH REGULAR COST, but equal to the high priced cabinet machines. Free Records with each outfit. SEND TODAY FOR FREE CATALOG and full particulars of our wonderful offer. Many a manufacturer got his start in this way. Why not you? Build machines and sell to your friends. Ask us about this. WRITE TODAY! (AGENIS ATTENTION MODERN PHONOGRAPH SUPPLY CO. our plans at a profit of $50 to $75 each. : Others are selling two and three a week. 274 Springer Blig., 313 So. Claston St., Chicago, Ill Here is your opportunity to make big COST eggset b t ut ; ’ Gentlemen: Please send me full particulars ot your money and become independent Pleas- Makafene pro >n, hout eb: yn to . : § a ee ee J ant and profitable work. START TODAY. Name .... +2000. 000 reterenees i Modern Phonograph Supply Co. Street Address... - © 274 Springer Bldg., 313 So.Clmton St., Chicago, Ill. Oity or Town - i ae B ~ ‘New aul — Plays in C, Bb, and A Thie superb Blorite ““Triple Tone Model Trumpet’’ cannot be equalled ot indoor and outdeor work. Just what musicians have long wanted. io to yourself, im your own home its superior tone and quality. Don't buy_a cornet or trumpet until you have Sent on Trial tried the Triple-Tone Blorite. Send today for Easy Terms iltustrated catalog, just out, of Blorite corneta, trumpets, trombones, fifes, bugies. drums, etc SPECIAL LOW INTRODUCTORY PRICES Blorite Instrument House, » teaperetite, 0. Band Instruments! Powerful in tone — Easy to blow Send for Free Catalog Leadmg Army and Navy Bandsmen are en- thusiastic about the tone and action of Lyon & Healy Own Make Band Instruments! Ask to see them at your dealer’s —if he cannot supply you, write us for catalog. Lyon & Healy, 57-99 Jackson Blvd., Chicago -opule Vechanics Y Sonora Semi-Permane se phonograph noodies replace st ~ 3 di} I 50 100 t 2 steel neces PALL M r- AKES “dimes N E E D L E. S needle records. Econ ——s conven fent. improve tone, and rve records. 25¢ per card of 5 40c in Canada. Write v for or FRE K sample Sonora Wiest briemcon, Ps Company. Buc dseorme b widen 279 Broadway, Dept. E. New ¥ a Ryrie Building . > . i) Williams’ Sounding Board 4 Place under recordon | any disc phonograph SEND $3.00 TO 0. B. WILLIAMS (0., ***t*s.5°""" Manuiacturers Sash and 1) _| 3 YEARS TO PAY Meister Piano ix’your ow = your own! SS eee Price $267.5 i No cash payment down. No ir —no extras. Piano steol with Pian $= ROTHSCHILD & COMPAN’\ = Dept. PMC-10 CHICAGO, IL! We will pay $500. od reward to anyone wh rmanentiy dim brifliancy of the RAJ dmmond without yp BR the st Jonds They stand all diamond tests—fire, aci glass cutting. Their brilliancy is eterna gots fora lifetime. Set in_solid eld a you te7o2.02 30 Days’ Free Trial }\.:"" a arn it. Bend today ay oo beaut vif flustrated je ry ec ok \ atak KRAUTH & REED, 1598 State St., Dest P2 164 POPULAR MECHANICS ADVERTISING SECTION

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HIM COMING FROM BOSTON POPULAR MECHANICS ADVERTISING SECTION TART, W. L. DOUGLAS WAS TTER, SALESMAN AND FRE- HIS OWN EXPRESSMAN AS WELL: ATON RESIDENTS TELL OF OFTEN ~ } A ROLL OF LEATHER {OER HIS ARM = |] AFTER SPENDING THE S$ HOLDS ITS SHAPE” 9°° & 31022 SHOES W.L.Douglas shoes are sold in 107 of our own stores direct from factory to the wearer. All middlemen’s profits are eliminated. W.L.Douglas $9.00 and $10.00 shoes are absolutely the best shoe values for the money in this country. W.L. Douglas name and the retail price stamped on the bottom guarantees the best shoes in style, comfort and service that can be produced for the price. tamping the price on every pair of shoes as a protection against high prices and unreasonable profits is only one example of the constant endeavor of W. L. Douglas to protect his customers. W.L. Douglas name on shoes is his pledge that they are the best in materials, workmanship and _ style possible to produce at the price. Into every pair go the results of sixty-seven years experience in making shoes, dating back to the time when W. L. Douglas was a lad of seven, pegging shoes. "The quality of W.L. Douglas products guar- anteed by more than40 years experience in making fine shoes. The smart styles are the leadersin the fashion centers of America. They are made in a well-equipped factory at Brock- ton, Mass., by the highest paid, skilled shoe- makers, under the direction and supervision of experienced men, all working with an honest determination to make the best shoes for the price that money can buy. The retail prices are the same everywhere. They cost no more in San Francisco than they do in New York. W. L. Douglas shoes are for sale by over 9000 shoe dealers besides our own stores. If your local dealer cannot supply you, take no other make. Order direct from the factory. Send for booklet telling how to order shoes by mail, postage free. CAUTION.—Insist upon having W. L. Doug- las shoes. The name and price is plainly stamped on the sole. If it has been changed or mutilated, BEWARE OF FRAUD. President W.L.Douglas Shoe Co., 128 Spark Street, Brockton, Mass. f W.L. DOUGLAS FREQUENTLY WORKED Yj EIGHTEEN TO TWENTY HOURS A DAY= Y RETURNING TO HIS FACTORY MANY A Z NIGHT TO LAY OUT THE NEXT DAY'S WORK, DAY IN BOSTON BUYING LEATHER AND SELLING SHOES

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164 POPULAR MECHANICS ADVERTISING SECTION . ; f a ¢ ¥ —- \ 7 i i 4 d mr he ” ee aie ree 4 & ke big Profits Repai ring Jires O you want more money? Do you want to get into a fast-growing, uncrowded business where you can make from $250 to $500 a month the first year? Do you want to be in dependent? Do you want to share the profits in the richest industry in all America? Of course, you do. Then investigate the tire re- pair business—and do it now. The Jim Dandy Tire Repair Plant is making money for many men. It can do it for you. Fortunes have been made in all lines connected with the automobile industry—but none has ever offered greater opportunity than tire repairing with a Jim Dandy Plant offers you today. The tire re pair men of America have a $200,000,000 business ahead of them this year. Think of it! By January 1st, 1921, there will be 40,921,076 tires in use in this country. Every one of these tires must be repaired some time. More tire repair shops are needed. Big, profitable business is waiting for them. Do you want it? Business Is Going Begging This is your opportunity. The tire repair in- dustry needs business men of ambition and ability. The field is uncrowded—the number of tires repaired is increasing at the rate of 40% a ys As proprietor of your own tire.repair estab) ment you will be dealing with the wealthiest most prominent people in your community. 1 people will ask you for advice about tires, a sories, even automobiles—unlimited opportuniti: profit will be yours. And you will be in a business which is an a lute necessity to the community. Tire repair t comes again and again. You will have a repeat business getting bigger and bigger every $250 to $500 a Month With your own Jim Dandy Tire Repair esta! ment you can make your income $250 to Ss month or more, dependent on your energy and initi tive. Many tire repair men who have done a bu ness of $250 the first month have increased $500 the third month. What these men have do! you can do. They started like you and learned t! business. Their success is not unusual. Get started in tire repairing with a Jim Dand plant and get started now. There will never be better time to start.

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POPULAR MECHANICS ADVERTISING SECTION Own YourOwn iBusiness-1Belndependent \ HY depend on another man’s business to the actual work, while you give your time and make a substantial income for you?- Why thought to the active management not put your time and ability into your No previous training—no long apprenticeship—no | tire repair business?—then you will get all you jarge investment. You can get started immediately You can be independent just as well as the —_open a shop—and in a short time you have more men who own Jim Dandy Tire Repair Estab work than you can handle alone. Good tire repair nt These men broke out of the rut, stopped men are badly needed. Your profits start the day for somebody else—and started their own = you set up your Jim Dandy Plant pair establishments j There is no city too large or town too small for W 7 h Y you to do a profitable tire repair business. To e eac ou every 11 persons in the United States there is an automobile with four tires to be repaired. No matter where you are—what your age or occupation—in one month from today you can be making money from vour own tire repair business if you start mow Let us prove it can start a highly profitable business today ew hundred dollars. One Jim Dandy Plant you—we teach you everything about tire re how to start in business—how to get trade to charge—how to figure your cash profits : . learn in one to three weeks—and be ready _A Jim Dandy Tire Repair Plant makes it easy ke money. . for you to learn the business and to turn out the 7 kind of work that brings customers back again and iain. It is the only tire repair plant on the market which uses superheated steam. Perfect work is as- sured even when you are a beginner. You can make any kind of a repair—and you buy no unnecessary molds or parts You do not pay for anything that will not bring returns [i makes no difference what your present business You can make a success of your own tire repair nent. You don’t have to be a mechani ‘either do you require a college education. Tire is a business man’s business. If you have ry and the will to do, we can teach vou in time The Jim Dandy has the largest capacity. of any plant of its size on the market. It is fully guaran teed and backed by our long experience in the tire repair business. We have established tire repair businesses for men of many ages and professions in towns of 200 population and up and have no record ] men who have made big money are the men of a failure We are ready to give vou every as have had the foresight and the nerve to break sistance from the crowd and strike out for themselves ' they saw a chance for independence Don't Get the Facts by Return Mail i salaried position keep you from vour chanc \\ ive had forty-one years’ successful business nee. Since 1870 we have been gathering the ition and experience which help you make a tart today. You understand, of course, that e you our training and help without charge n your own business, be your own master Investigate. Send the coupon below or a letter ket your own profits. Many a “job” has kept a OF postcard. This brings you full information— n from a bigger opportunity as an executive in Personal consideration and advice—and a big catalog wwn business ; Tells all about the tire repair business. How you can make money—be independent Your Opportunity By return mail vou can have all the facts before you You might as well make $5,000 a year. It is Haven't you often felt that vou could manage the up to you. You know vou want it. Then investi- iness vou are in now, if vou had the training gate Use the coupon below | opportunity? Haven't vou suggestions and ideas vou know would make bigger profits possible ? Scheffer & Rossum Company yourself a chance to use these ideas wher Established 1879 will pay you St. Paul Minnesota [In your owm tire repair business you will have a nce to do the planning and give the instructions IAM DANDY t short time you can have more work than you do alone. Then you will have assistants to do TIRE REPAIR PLANT ** ec ccececeseessesssesseesseseesss TEAR OUT HERE —MAIL TODAY 3‘*eeettettetttetctestrescessnnnnnnas FREE INFORMATION COUPON Scheffer & Rossum Company, 106 E. Tenth Street, Saint Paul, Minnesota Gentlemen: Please send full information about how I can start in the tire repair business « ma pital and make a good income. Also your FREE book entitled, “Your Opportunity a V vame Address

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166 POPULAR MECHANICS ADVERTISING SECTION Bea It Can Be Done— YOU Can Do It THOUSANDS ARE DOING IT; we know because we have thousands of unsolicited testimonials from satisfied users; that we have been successful in developing a sim- ple device — adjustable which enables the user to quickly and accurately CUT HIS OWN HAIR with a process of simply combing it with a COWAN MASTER BARBER HAIR CUTTER. Free Trial Offer You can cut your own hair just as easy as you can shave your face. No more taking “turns” at the barber shop. Today men shave themselves and cut their hair at home. It’s part of the regular toilet of particular people to trim the hair a little every few days. MOTHERS keep the children’s hair trim and neat with a N HAIR CUTTER Hz is made Scientifically Cerrect, Cia? Sanitary and tor Universal Use 2) for men, boys and Mothers. Ca- pable of any work a barber can do — quickly turned into a high class SAFETY RAZOR —-a whole barber equipment. Made of solid Nickel Silver—simple and durable con- struction. Takes the place of two pairs of clip- pers, scissors, comb and razor. Shaves back of neck, face, trims the beard or mustache and cuts the hair in any style desired. Sold only under our MONEY BACK GUARANTEE. FREE! Send No Money. Just send your name and address today for our Free Trial Offer how you can try the COWAN in your own home for thirty days at our risk. DEALERS and AGENTS WANTED DEALERS and AGENTS inevery .+/f% country in the World are ns for Cen Why not YOI Cowan Hair Cutter Co.} Dept. 700 KANSAS CITY, MO., U.S.A. Please Mention Popular Mechanics | | | | | | Buy NOW Direct Offer good this month only. Las lot sold fast. Everybody delighted. Never again a bargain like this. Lisle Finish SOX Extra fine quality—medium weight- positively not seconds. Cost you 50c Strong to 75c a pair elsewhere. Our price only heel and toe Pair, $3.75. A clearsaving of fror One Dozen 2.25 to $5.25 per dozen for ye Colors: white, natural tan (very popular now), and black. Won’t fade. Sold only in dozens; colors and sizes mixed Only 3ic if desired. RATE PER PAIR, s Ein, SEM 3. Guar- t ox anteed finest quality and perfect ps Nowat thisextremelylow Sgurec of 3 Pair for only $2.95. Best for dress wear. Silk h: indicates the man with money. Get this wor derful bargain now. Better than many that sell for $1.’ per pair. nae black, white, ey browsmg, navy green, purple an gray—aseorted if de- sired. 3 pair, only $2.95. Rate, per pair, Only con FREE EXAMINATION 222 '2¢ 2320 cercrutiy bs cep Thousa: ds of gusates haven’ now wearing Bach Br A Some buy six, eight and twelve duzen pair for selves and friends Order Now_—Send ‘No Money £353.2°", 6° do! Sox mailed prepaid, You pay postman on delivery. No extra ci of any kind. Guaranteed to please or money refunded. Order now risk ae ours. Make this enormous saving today. Be sure to give size « auted. When ordering, state Dept 806. BACH BROS, 7° \c2 ssistving Customers—tur Beco References: Dun or Bradstre 115th St. & Michigan Ave., Dept. 806, watpage | Extra Wear Absolutely Waterproof Steels Oost less than leather, wear 3 to 6 t longer, are lighter, easier, stronger st big shoe bills Eliminate repair Stop foot troubles. Prevent Colds, | matism, Corns, Bunions Kee feet warm and dry in snow, : mud, siush. Never change « comfortable always FREE Shoe Book Tells All. Write Today N. M. RUTHSTEIN, Vice-Pre STEEL SOLr SHOE co.., Dept. A37.F Racine, Wis Blue Buckle OVEFAIs for Work for Work’”’ I Jobbers OverAll Company,Inc. Lynchburg, V4 rrom iuat Tireu, Acame, broken Down reenng Jung's Arch Brace, just out, corrects yor r foot t oubles. As sists nature to overco: ¢ falie over hose. Takes up no room in shoe. Fits the foot perfe Holds tiny bones of foot in natural, comfortable posit tior Strengthens an i supports muscle — ngainly humps leath« er pac is. No metal plates, nsure comfort and € -n walking’ or standing, use Jv ING GS ARCH@>pRACE Recommeuaea 0 Physician: Made of specially prepared ** Superlastik.’’ Guarantec:. Price $1 per pair Money back if not satisfied. Order today Ask your Chiropodist, Phy cian, Shoe Dealer or Druggist THE GRORGE H, JUNG O°. 260 Jung Bidg. Cincinnati, 0. nanhautl yot-stiain. Slips «

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POPULAR MECHANICS ADVERTISING SECTION Get Our FREE Biue Print Offer DEALERS wear isr noncwe Built Phonographs SAVE OVER u few hours’ interesting work saves many dollars — gives you a fine machine exactly to suit your ideals—better than many machines costing much more. Plays any record. We furnish complete, simple plans and diagrams —anyone can understand them motors, tone arms, case material, everything required, and full instructions. F. C. Strong, Canada, says: “Please send me one of your cireulars, ‘ How to Build Your Own Phonograph,’ as I would hike to make one. Mr. Gallie has built one and if he hadn't told me that he had made it himself I would have taken it for a $150 model.” Listen to thie from Charies F. Mancke, Warh.: “ Received the two outfits, and am well pleased. I built one machine for myselfand took an order for one for $175. I now have mine done, and it has «a wonderful tone. I would not take $200 for it.” We are the originators of the home building idea. Our customers always succeed because our plans and system are easy and clear. No special skill necessary. Make Big Money Building Phonographs Ask for Our Sure-Fire Plan and Free Blue Print Offer You can make hundreds of doliarseasily. Ask us. We tell you how and help you ve have started many others. w e can start you. Pleasant, @asy work J. Adame, Michigan, saye ‘Just sold my phonograph which I ay from your plans and parts at nearly $100 profit. Only took sbout a week working evenings to build it. Thosewho have heard it say that it is better than phonographs they have seen and heard at $200.”* Become a Home Dealer — Wonderful Pian Our dealers’ proposition on our ready built Phonograph wil! appeal to you. It’sthe best thing yet. No canvassing— no work—no capital needed. It works every time. We give you full particulars and show you how to make sure, easy money. Remember, we are the old reliable house-originators of the home building and home dealers idea. Write today. Get our proposition. Have a fine phonograph at half price and make money besides. ——____—_ ——— gaz08 723g Note how Genco Razors meet the Ss opel LS strop in just the proper way to SAVE 25% to 60” on slightly eased | —stao® assure a perfect shaving edge. Came ALEX EDDAES Arie o + The bevel lends backbone to the Equal to new. Save mone . a aie aoe fon edge and guides it on the strop. GENEVA CUTLERY CORP. GENEVA, N. Y. the national RINGE ey smoke Our exclusive patented BERT process cuts out bite and parch. — work clothes for Men— FREE BARCAIN BOOK AND CATALOGUE listing hundreds of money-saving b: irgains it So slightly used and new cameras and supplies All = is sold on 10 days’ Free Trie!. Money bac k if notsatis - ots —_ fied. You take no chances dealing with « We have been in the photegraphic business over 16 years. Write now. CENTRAL CAMERA CO., Dept. 16, 1245. Wabash Ave., CHICAGO roomy, yet well-fitting—guaranteed to give Satisfactory wear, or money returned. Union made. Ask your dealer. The Electric Safety razor makes shaving a | SWEET-ORR pleasure. Blade vibrating 7,200 times a minute | CLOTHES-TO-WORK-IN cuts the beard smoothly and without slightest pull or Overalis irritation—feels like a gentle massage. Can be used with Work Suits Work Shirts or without electric current. al urs Lek-Tro-Shav ‘sk Wel! A barber enys —**Have shaved for years and have never used any shaving device near its equal.”’ A » weer says — “The most pleasing shave I've ever had . giving a 300 candle in my life. Shaves my face closer than I used to shave. but A powerful portable lamp, — Pure white light. what the farmer, there i is no after irritation or ill effects as I meualiy get from iryman, stockman, etc., sents. Safe — Reliable another fasor.’ — Economical — Absolutely Rain. Storm and Bug No. 1 Made for use from Light Secket. f. Burns either gasoline or kerosene. Light No. 2 Made for use from Dry Battery. mm weight. Agents wa Big Prokts. Write for Catalog. ‘Weite tor Hlestrated ciroular describing Lek-Tro-Shav Salety Razor fully. The Best Light Co. (o.. 324 E. Sth St. Canton. 0. Vibrating Electric Razor Co., Dept. 132, 729-31 W. Breadway, Council Bluffs, la.

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15 POPULAR MECHANICS ADVERTISING SECTION TEA that has CHARACTER | Ridguays vs THERE must be a reason— | 3 —why connoisseurs of two hem- ispheres have chosen Ridgways Tea since 1836; —why this famous beverage was awarded the Gold Medal— Safe-Tea FIRST Highest Honor for India-Ceylon Packed only in TIN— Teas, San Francisco 1915 and to keep the flavor in. San Diego 1916. | Violin, Hawaiian Guitar, struments sold on our famous \ Ukulele,Guitar,Mandolin, Cornet,Tenor Banjoor Banjo a) Play While you Pay” plan, Free Shigg 4 Wonderful new system of teaching note music by mail, To fir meme - Catiiees den - : 3 pupils in each locality we give a $20 superb Violin, Mand lesson certificate with each ine Ukulele, Guitar, Hawaiian Guitar, Cornet, Tenor Banjo or Kur strument, ibsolutely free. Very small charge for leasons only. We guarant: Learn To Play success or no charge. Complete outfit free, Writenow. No obligat il $n bands and orchestras from Jenkins’ © SLINGERLAND SCHOOL OF MUSIC, Inc., Dept. 157, CHICAGO, ILL band and orchestra books. First violin or }} cornet books free. WRITE TODAY, simply send name, a post card will do, for 155 page 20th Century Solid Silveroid Watch - 25 fully illustrated catalog, easy payment plan | Men's or Boys’ Popular size. Guaranteed perfect —- and free instruction system. ime keeper, in splendid Thin, Mode! Case. Open face, C.0 JENKINS MUSIC CO, 7° Jenkins Build | Lever escapement, Stem Wind and Set. Written Guarantee with each #2! KANSAS CITY, MO. | We Pay the ; $3.2 War Tax | c.o.D. | Free Prese nt with sach watch. Senc O to your dealer for a free copy of The U. S. Game | Sates Tt g: oe Law Book. Contains much useful shooting information | >eautiful Waten in addition to the Game Laws. If he doesn’t carry -y a a rte The Black Shells, send us his name and address with your ' tern’ Gols 3 F wn, and we'll send you the book by mail. . We refund tency ff net satiefied This offer is for shor United States Cartridge Company, 111 Broadway, N. Y.C. | Consolidated Watch Co., Dept. 11A, 160 N. Wells St., Chicago - nt Direct at Factory Prices | This $2 KNIFE $1.38 Postpaid | Hand Forged Razor Steel Blades | Handy shaped blade makes t! knife best for mechanics,sportsme! and farmers; light but strong; re sharpened easily. Stag handle, Ger | man silver finish; blades file tested, | hand forged from razor steel and | warranted ae Sample $1.38. 3 for $3.60 postpaid. Send for our 100 page List and “HOW TO USE A RAZOR” MAHER & GROSH CO., 106 A.St., Toledo, Ohio Forged Razor Steel Blades, No. 57 q

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POPULAR MECHANICS ADVERTISING SECTION 169 Yj} | y y | Z/ / ly “4 Uf LPG ht YYOLE / / In Livest Business Field Today Why work for wages, when you can with a small initial investment start in Business FOR YOURSELF—BE YOUR OWN BOSS and MAKE MORE MON- EY besides? We'll start you out by teaching you the very latest and most scientific Bar Double Square Dia- Rib Track Ptain methods in this highly profitable BUSI- — NESS. We have schools located in all sec- tions of the country where we teach prospective purchasers of our equip- ment how to do ANTI-SKID RE- TREADING AND GENERAL TIRE REPAIRING. $100 to $1000 Weekly Once you learn the business, there is no limit to the money you can make. Thousands of men whom we started in this money-making business are making anywhere from $100 to $1000 weekly. You too, can earn as much. We not only teach you how to operate our complete vulcan- izing plants, which consist of Section Molds, Retread Molds, Boilers, Tread Peelers. etc., but also the many other details of the GENERAL TIRE REPAIR BUSINESS. Taught by Practical Men _Our instructors are acknowledged experts in all phases of tire repair work both scien- tific and practical and are fully competent to teach you everything known of the business Our methods and machines are used by the United States Government in Military Training Schools throughout the country. WS SSS SESS SSS SSIS S| sSAF/FBGFPF.FkEQP§PQ‘P\AE¥\¥#EUA\¥\§gAS\sg MSS5N555 Model A Equipment Investigate our proposition. Write in and we will send you introductory card to the school nearest your location. See how fast this field is developing. Find out what you can do. Our School directors will be glad to talk to you Our Model “A” Equipment will do any job that comes into your Tire Shop from Section Work to Retreading. Complete with Bead-Plates, Anti-Skid Matrices, Boilers and Fittings, ready to use. We make a complete line of Vulcanizing Equip- ment, Section Molds, Retread Molds, Boilers, Tread Peelers, Etc. Decide NOW—TODAY—TO MAKE MONEY—Write for our pro- position and our large, handsome 1920 Catalogue showing a com- plete line of the most up-to-date Vulcanizing Equipment in the World Main Schools: Detroit, Akron and Chicago. / YU UY ULL LLL ily, RN TIRE & RUBBER WORKS Anti-Skid mg MUL LL i pyppiinem RM Ys ylides Ave /Chic age US. Y ‘ V4 f/f, f Ups fpf, Vif fj Ptreadi ee Ketreading Mold Makes All the Above Designs 4, / SZ j ) Vb h, ' iy / Please Mention Popular Mechanics

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POPULAR MECHANICS ADVERTISING SECTION They work naturally - and form no habit They work naturally and form no habit | - 2 ~ — — 7 - m) \ j > on G QLERSE F RUNE \W 6% pl They work naturally and form no habit | . They work | naturally | and form no habit At the S000 Stores only

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POPULAR MECHANICS ADVERTISING SECTION we Z Wz) Made on a dfferent Princi- ple from all other Air-Rifles. The Benjamin ie really a strong air- pump used to compress the air fn the air chamber to ary degree of er desired. From one to six et of the pump rive all the force necessary . Each additional stroke gives increas: 4 power. The Benjamin works on the eome principie as all sir-drilis and air hammers—with this difference: lou control the shooting force as you de- ¢. Look at this block of hardwaocd It ws how Benjamin power is regulated as Yy wish You can’t have accidents with a Benjamin. It's safe, always, because you contro! the power. The Benjamin never loses shooting force, and has no springs to ent ot order or shake youraim. Wriveus foran interest- img folder about this wonderful air-gun, For sale by all « Ask your AIR-RIFLE & MFC. CO. 615 N. Broadway, St. Louis, Mo. Pacific-Ceest Represent a'ives: b.cDonaid &

6 “EEETELEGET EEE

t -——— Send for a Complete Catalogue of | > ‘ § | MASONIC BOOKS _Jested inG | Sts Jewelry and Goods i Yosition 8. Pret $ yg ' KA REDDING & CO. © [VERY Ingersoll Reliance is tested in six Publishers and Manufacturers positions—12 days—2 days in each posi- m Dest. P 200 Fifth Avenue, New Yo:k tion—before it leaves the factory. These posi- tions are illustrated above. This test follows the 127 imspections that are made before the movement is completely assembled. Together they assure accuracy and reliability under all conditions. The Reliance movement is 7-jewel and of Anemoan TELEPHONE ANS TELEsanrn Gonna the solid or ‘‘bridge’’ type of construction as One Policy ro a ae —_— employed in the Jurgenson and other fine watches. \ et you can buy the Reliance ina solid nickel screw case for just $8.00, or ina gold filled case

Samtary Metal Holder Keeps Rubber for $11.50. Canadian prices: In nickel case $8.75 Clean, Firm and Keen-Edged. In gold filled $13.00. Works Better—Lasts Longer Let the dealer show you. Look for the Two Rubbers, the length of the Holder, x -_ 5 one are ma'‘e, one for Ink, one for Pencil store with the Inge rsoll di pay: By slight preseure, clean Rubber is fed ROBT. H. INGERSOLL & BRO down as wsed. Price L5c each; Fillers 5c . a : ; : a each, 50c perdoz. “OK.” Booklets FREE. New York Chicago San Francisco Montreal Adjustable Brush to fit Holder 10c The 0. K. Mig. Company, Syracuse, N. Y., U.S. A. They Erase ere 0 ‘as . he "' Pape € 4 fi D ~ish Your Stationers "jSluenerad Latter Openers. e y. mgerd Ol [SUPEMION Since ipo4 = A Zo ; 4 at . Over 100,000 in Use Mestly sold th . y —— SF ~ Adding Machine ( =) reagh recommendation 2___. ~ For PERSON [SK or y q & 7 £ es OCCT LE mY of Rela WMNCe tor ender nahn, a CIR ER: HT J | 7T-< ewel ; Bridge Model | E.GANC Ped ANCHER, A.A.M. Co. ee 7 core eos AGENTS WANTED |\thultipties Subtracts §*, |

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Street. ~ C =“w YORK Please Mention Popular Mechanics

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72 POPULAR MECHANICS ADVERTISING SECTION BIG MONEY in this game Write us today. Let usshow you the big money there is in Ame rican Box Ball. Scores of men are making $100 a week from just two alleys. C. T. Patterson of Illinois opened tbree alleys CAN make a good , and cleaned up $800.70 the first twomonths ys penman of you at your Now he operates eight alleys and out of —— home during spare time, the proceeds has paid for a beautiful 3 ny no matter where vou live or *~ ——a story home Ny : 10W poorly you now write. My sim- * Wonderful automatic features Wal A plified system has shown thousands of , American Box Ball becomes the rage wherever YT | itis started. More fun than ordinary bowlin 5 cents per Game and practically 10v per cet »rofit. No helpers and no wages to pay Pins are reset and balls returned auto- matically. Wonderful automatic elec “ tric lighted scoreboard. Write for full o description and particulars of our 4 special proposition to live men. We help you start Very little eash is needed e let you have the equip- ment on easy others the way to good penmanship during the past twenty vears it can ind will do the same for YOU! Beautifully Illustrated Book **How to Become a Good Penman” ‘ It contains general inf FREE! p mat I rit test the nation, with imoni als profits. and beautiful specimens »f penmanship showing what others have iccomplished by the Tamblyn System. ’ ~ if Wrirk Topay F. W. TAMBLYN 418 Ridge Bidg., Kansas City, Mo., U.S.A yj IW Za ' vm, . ld ‘eh = ; ; wy Write ust Mi} re | osition a full descrip ’ tion o equipment » obliga tion. by ‘y- Yr. ae will 4 AMERICAN BOX BALL CO. fa " 856 Van Buren St. indianapolis, Ind. BL. of Standard First Quality Govt. IN YOUR Goods trom Cancelled , OWN Yow cam mead Tua Ukethuqukly HOME Piano, Organ, Violin, Mandolin, Guitar, Banjo, ete. Beginners or advanced players. One leason weekly. Llustrations make every tt lain. Only expense about 2c per day to cover cost of postage and music used rite for FREE booklet which explains everything in full AMERICAN SCHOOL OF MUSIC. 50 Lakeside Building, CHICAGO Card Printing Automatically Shoes ooo a IS PERMANENT BUSINESS Tents.. 7 ALL YEAR ROUND — BiG PAYING EVERYWHERE GOVERNMENT CONTRACTS Ask for big catalog 112 — Army Shirts ess "late Breeche Blanket and all other articles for camp | or outdoor use Our press prints and feeds 100 per minute, 6,000 s : oa per hour. Business cards, visiting cards, ticke ts, end 10c for ~— ny & Navy ( atalog 112 and postal cards, souvenir postais, announcements yuy at tion Bargain Prices lavitations. blotters, programs and many others and r . 7 practic sally’ all profit. Write for our free booklet 3, ARMY & NAVY STORE Co. Get our proposition. Supply houses get our Trade offer. 245 West 42d St. NEW YORK Sennens diem anntiiienntaiiiinans Automatic Printing Devices Co. Patentees and Manufacturers Second and Minna St., San Francisco, Cal. ‘> D\ \ fp WHAT EVERY BOY WANTS Dy mechanisms — makes them work smooth and easy \ few drops of 3-in-One is the high quality oil that acts like magic on bicycles, skates, guns, fishing reels, automatic tools. Does wonders for all light * * will relieve friction, reduce wear in the bearings and 3 -“In-= ne | save repair-bills. Cuts hardened grease — works out all dirt. Never gums. Contains no acid. *revent rust ind tarnish by wiping all nickeled and metal surfaces with 3-in-One. Then rub with a clean dry cloth—this brings a bright,lasting polish, like new. 3-in-One softens F REE — Write us for generous sample of 3-in-One and Dictionary of Uses 3-IN-ONE OIL CO., 165 CNG, Broadway, NEW YORK iS baseball mitts and glove makes the ball stick better—preserves the leather. Fine SS for baseballs—strengthens the stitches—makes the cover last longer Non-greasy Om Sold at all stores in 60 0c and 15¢ bottles; also in 30c Handy Oil Cans.

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POPULAR MECHANICS ADVERTISING SECTION 173 ATEN TS cooviicnts SPECIAL OFFER— Free Opinion as to Patentable Nature = Before disclosing an invention, the inventor should write for our blank form “Evidence of Conception.” This should be signed and witnessed and if returned to us together with model or sketch and description of the invention, we will give our opinion as to its patentable nature. Our Three Books Mailed FREE to Inventors OUR ILLUSTRATED GUIDE BOOK HOW TO OBTAIN A PATENT Contains full instructions regarding Patents, Trade-Marks, Foreign Patents. Our Methods, Terms, and 160 Mechanical Movements illustrated and described; Articles on Patent Practice and Procedure, and Law Points for inventors, OUR TRADE MARK BOOK Shows the value and necessity of trade-mark protection and gives informa- tion regarding unfair competition. OUR FOREIGN PATENT BOOK We have direct agencies in all the principal foreign countries and secure foreign patents in the shortest possible time and at the lowest cost. Write for our illustrated Guide Book on Foreign Patents, sent free to any address. Specialization—Our Staff The field of invention is so vast that it is impessible for any one man to become an expert in all the different classes of invention. Only those practically skilled in the class to which the imvention relates are capable of rendering efficient service. For this reason Victor J. Evans & Co. employ a number of patent lawyers and mechanical experts who have been selected for their special knowledge and ability in certain lines of mvention. Each case is placed in charge of experts in the classes to which the invention relates. THE VALUE OF YOUR PATENT will depend much upon the skill and care with which your case is prepared and prosecuted in the United States Patent Office. This work will receive the benefit of skill and experience acquired by a long and successful practice. We spare neither time nor pains to secure the broadest possible patents that the inventions will warrant. That every case intrusted to us receives our best efforts, and that our work is done consistently, skillfully, and thoroughly is evidenced by the many unsolicited letters of commendation that we receive constantly from our clients. We will furnish upon request lists of clients from any State in the Union for whom we have secured patents. Our New York, Philadelphia, Pittsburgh, Chicago and San Francisco Offices Owing to the growth of our business we have established for the benefit of our clients Branch Offices in New York City, Philadelphia, Pa., Pittsburgh,Pa.,Chi- cago, Iil., and San Francisco,Cal. These branch offices being located in these ; : large commercial cities together with our Main Office located near the U. S. Patent Office,in Washington,enables us to more promptly handle the business of our clients, particularly as the branch offices are in constant touch with the Main Office and fully equipped to handle patent business in all its branches. Highest References— Prompt Attention Reasonable Terms cr—-—-—— — — ——-FREE COUPON-— — — — — — — VICTOR J. EVANS & CO.,Patent Attorneys NEW YORK OFFICES PHILADELPHIA OFFICES PITTSBURGH OFFICES | 1007 WOOLWORTH BLDG. © 135 S.BROAD STREET SI4 EMPIRE BLDG. | Chicago Offices: 1114 Tacoma Bldg. San Francisco Offices: Hobart Bldg. j MAIN OFFICES: 765 9™ STREET. N.W.,WASHINGTON, D.C. | Gentlemen: Please send me FREE OF CHARGE your beoks as described above. , ’ Name. . Address —

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POPULAR MECHANICS ADVERTISING SECTION PATENTS 7 YOU HAVE AN IN- vention which you wish to patent you can write fully and freely to Munn & Co. for ad- vice in regard to the best way of obtaining protection. Please send sketches or a model of your invention and a description of the device, explaining its operation. Allcommunicationsare strict- ly confidential. Our vast prac- tice, extending over a period of seventy years, enables us in many cases to advise in re- gard to patentability without any expense tothe client. Our Hand-Book on Patents is sent free on request. This explains our methods, terms, etc., in regard to Patents, Trade Marks, Foreign Patents, etc. If you are a reader of the SCIENTIFIC AMERICAN you are probably aware of the fact that it has a special appeal to the inventor. Each issue contains a de- scription of a large number of recently patented inven- tions. Pending patent legis- lation as well as the most recent rulings of the Patent Office and the courts are considered in its columns. MUNN & CO. SOLICITORS OF PATENTS 672 Woolworth Bldg, NEW YORK 625 F Street, WASHINGTON, D.C. 801 A Tower Bldg. CHICAGO, ILL. HOBART BLDG., 582 Market Street, SAN FRANCISCO, CALIF. o o PATEN TS Trade | Marks Send sketch or model for actual search and report. Write for Book- let of instructions on patent practice and procedure. Prompt personal service.... Geo. P Kimmel Patent Lawyer 53G Loan & Trust Bldg., Washington, D.C. EPR PEE SEULEL EAT EEL EEE VIOUEEEOTO CT CSET CC BPIOEE CE SISEE ROPES EC SEE SOUS L ES EEG! PoPEME CUCU PRT COOPER ORCES ELOISE OC POT CCER OPE RU CEEOUSSUEUEOCSSOEECIIOSCE TESST TET ISATAC RATA AUDA LEEELLOCET ELA tact atterarecestee Do You Know Every Move Your Attorney Makes” | \~ INVENTORS #4 My clients are immediately informed of every | step in the prosecution of their applications Write now— PA TEN T S —Send sketch | Free Booklet on Request. Office of WARNER I. CUBBERLEY, Patent Attorney | 21 National Union Bldg., Washington, D. C. J es PARKER , Member Any ine PATENT CLawver MCGILL BLOG WASHINGTON. D Patents, Trade Marks, Copyrights, Patent Litigation Handbook for Inventors, “* Protecting, Exploiting and Selling Inventions,’ * sent free upon request. | Experimental | Work — | Light Manufacturing Metal Stampings and Instrument Work Tools, Dies and Fixtures Service and Reliabilit, WM. A. ZEIDLER CO., 401-425 E. 163rd St., NEW YORK CITY | oarsnse | She Book for te. |\| Inventors and Manufacturers SIXTH EDITION ee By return mail FREE. aut COrTION Write LACEY & LACEY y Dept. |, Washington,DC

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POPULAR MECHANICS ADVERTISING SECTION PATENTS Booklet Free Highest References Promptness Assured Best Results Send drawing or model for preliminary examination ALL BUSINESS GIVEN PROMPT AND PROPER ATTENTION WATSON E. COLEMAN, Patent Lawyer, 624 F St., Washington, D. C. pat TENT ms

7 oy penne A tema bea agent ing app ~ es on f r “nt o re que + “4 w th b PATENTS gira TO GET rem. Prompt, -enren| e by registered Patent Attorney. CLARENCE A. o’ GRIEN, as —ahhy Cc. LINTON Consulting Engineer and Patent Attorney entor’s Adviser’’ mailed free on iest. Gives full information as to ts, Trade Marks and Their Cost. | 364 University St. | ) Offi | 915 F St., N. W. | Montreal, Canada 1 aes } Washington, .<. |

To the Man with an Idea I offer a comprehensive, experi- enced, efficient service for his prompt, legal protection and the development of his proposition. Send sketch, or model and descrip- tion, for advice as to cost, search through prior United States pat- ents, etc. Preliminary advice gladly furnished without charge.

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My experience and familiarity with various arts frequently enable me $ to accurately advise clients as to i R cord x urinvention before filingapplication, by ; :

my form “ Fixing the Essential Dates of In- i, probable patentability before they | v — it upor X "iy an. attorneys inform oe } go to any expense. 1 | years’ actual expe easonavle pre-war charges. Booklet of valuable information and form for properly disclosing your idea free on request. Write today. Richard B. Owen, Patent Lawyer 9-303 Owen Bui'ding, Washington, D.C. 2276-E Woolworth Bldg., New York City |B. P. FISHBURNE, 320 McGill Building, WASHINGTON, D. C. PATENTS PROCURED and TRADE-MARKS REGISTERED ty Years’Experience. Instructionsand Termson request . _ ROBB, ROBB & HILL, Attorneys-at-Law en mn Bidg.. Washington, D. C. 1332 Schofield Bidg.. Cleveland, Ohio p ATENT If You Have an Invention and Desire to Learn How to Secure a Patent Send for our Guide*Book, HOW TO GET A PATENT, sent Free on request. Tells our terms, methods, etc. Send model or sketch and description of your invention and gh PCRS e eee eS SSSR RES E ESSE SESS E SR ERESEEES ESSE ES EeEEE eee ET we will give our opinion as to its patentable nature. RANDOLPH & CO. 600 F St., N.W., Washington, D.C.

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176 POPULAR MECHANICS ADVERTISING SECTION Can You think of a simple, practical idea that will fill one of the man y requests we have on file for new inventions? It may mean a fortune for you. Thousands of things are needed right now. Your brains can help. Send today for our great new book- “Inventions and Trade-Marks, Their Protection and Exploitation” FREE BOOK ON PATENTS Before applying for a patent write for a Free Copy of our book, ‘‘How to Obtain a Patent,’’ which con- tains valuable information and ad- vice to inventors. It tells how to secure Patents. Send a model or sketch of your invention for our ‘‘Evidence of Conception’’ form and our opinion of its patentable nature Free. (20 years’ experi- : ° ence in patent matters.) Write We Help Our Clients and learn more about making money from ideas than you ever knew before. It tells many things that are wanted, too A postal will do — It is free Patents today for your Free Book. without charge, to get Advertised the dollars out of their For Sale ideas—having facilities Free none others possess. Advice free. Don’t delay—get the book at once. man with an j Renesicen lntestaies los. Send for free: 200 Patent Dept. Copy. One yé | WASHINGTON, D.C. subscription, | Send Usa Sketch | or Model and in Invention and Manufactur ing Supplement Published for th planation o invention for our opinion concerning its patental ture and exact cost of applying for patent. Or r “HOW TO OBTAIN A PATENT” Sent Faas on Request It tells how to apply for Patents, Trade-Marks ents, Copyrights, ete. ; gives information on Patent I tells what every inventor should know Thousands of Invent ors, Who are our clients, are our reference CHANDLEE & CHANDLER, 75 Years’ Experience. 406 Tth St. WASHINGTON GEARS émaic The most accurate made and 7 reasonable. We carry a complete of gears in stock for immediate « ment. Oan aleo quote on especial « ® of all kinds. Send us your WRITE FOR CATALOGU! CHICAGO STOCK GEAR WORKS 105-109 S. Jefferson St., CHICAGO DON’T LOSE YOUR RIGHTS TO PATENT PROTECTION Before disclosing your invention to anyone, send for blank form “EVIDENCE of CONCEPTION” to be signed and witnessed. A sample form, together with printed instructions, will show you just how to work up uur evidence and establish the same before filing appli tion for patent, As registered patent attorneys we rep- nt hundreds of inventors al! over the United States and Canada in the advancement of inventions Our sched V2 Price $2.50 SEN) NO MONEY| IF You Can Tell it froma GENUIPE DIAMONDSendit back oft tebe bam pe oo _ fer one = le ee pore Powe a rips lo prove that our blue-white MEXIC AN DIAMOND cl 6 - a i tee hagas rhe nd ay ae Se sembles the finest genuine Sonth African Diamond ' gs ente anc Ke pose of : es sent upon request. Ask times as much). with eame DAZZLING RAINB Ow.-F hk } 3 or them —a post card will do anteed 20 yrs.) we will send this Ladies Solitaire Ring t a irat gem, (Catalogue price $4.98) for Half Price to introd: ‘ PATENTS ANO 7 —NIRADE MARKS $2.50, plus War Tax l3c. Same thing bat Ge nts. Heav | Belcher Ring, «C ges 1@ price $6.26) for $3.10, plus W : Lx Mountings are « finest 12 karat gold filled. 4 monds are Gl ARANTEED FOR 2 0 YEARS. SEND NO MONE) Just mail posteard or this ad, state size and we will 1 ©. O. D, if in t fully ple oned, return in 2 days for MONE ! less handling charaes 9 tick; offer limited; on! ‘ 204 OURAY BLDG., W287 wasHIncron, p. c. customer. Write for FR fc E ‘latalog. AGENTS WAN'F [ ' (Originators of form * Evidence of Conception.) MEXICAN DIAMOND IMPORTING co. : Dept. ET. Las Cruces, N. Me» ' ¥C MIELE Comtrodier Wext

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| = Alonzo S. Thomas f the Watch has { eSanta } ial,a Rail- k. Think how dis tive your watch e with your own monogram, or em inlaid in the solid gold, POPULAR MECHANICS ADVERTISING SECTION 177 P ‘ _ Think of it, men! For $3.50 a month you can NOW own a Standard Railroad watch that you will know is clipping off the seconds as regularly as your heart beats. Time is your greatest asset. Be careful how you spend it. You can’t utilize it right up to the second unless you have a watch that you know will never lie to you. The Santa Fe Special is just such a watchas this. STANDARD, GOVERNMENT ACCURACY, MARVELOUS BEAUTY, UNSURPASSED LIFE-LONG DEPENDABIL- ITY,—all are combined in the highest possible degree in the Famous Watch, The One Standard Watch Guaranteed for a Life-time of Sat- isfactory Service, not only by the Santa Fe Watch Oo., but by the Great Lllinois-Springfield Watch Factory. I will send one for vou to see, WITHOUT ONE PENNY DOWN, allow you to wear it 30 days FREF, then sell! it to you on very Easy Payments on a binding money-back guarantee. Your name or monogram and any em- blem you may desire will be engraved in the Case to suit your own ideas. Write for Free Watch Book and make your selection NOW. 21 Perfect Jewels Adjusted to Position Adjusted to Temperature Adwsted to Isochronism Adjusted to the Second Thin Model—All Sizes Guaranteed for a Life- For the past fifteen years | have been running an engine on the Senta Fe Railroad with one of your “Santa ke Route" watches. It has given me faithful service and has passed the inspection every time. When I saw your new thin model “Santa Fe Special" watch, I liked itso well I decided to turn my old watch over to my son. | am glad to say that the new watch is giving me the same accurate time that the old one did and, it being much smaller and neater, I like it much better. I do not hesitate to say that I have absolute confi- dence in the “Santa Fe Special" watch and the Santa Fe Watch Company. Your guarantee, 1 have always found, means just what it says H, P. FRENCH A. T. & S. F. Engineer, Argentine, Kansas ~ FeTLLINDIS ZnS 50 A H.P. FRENCH, the veteran Santa Fe engi- neer who heartily re ommends the Santa Fe Spe- cial Watch SantafeSpecial QL JEWEL CF chr Don't “X= Wait, SS Write for the New Free Watch Book ) A letter, f d thi upon will bring my Free Watch Reok The Santa Fe Watch Co, | —————"—_—~ Santa Fe Watch Co., 66 Thomas Bidg., Topeka, Kansas 66 Thomas Bidg., Please send me your New Watch Book with the under TOPEKA, KANSAS 1 standing that this request does not obligate me in any way “The Home of the Great Santa Fe ' Railroad” | ROOPOEB soc ccccccccccosceces ccceceeccccsoce State... .ccccccsceces Name....... errererererererrrrr rrr iti tt et ttt ter tier °

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HOW TO | SELLYOUR | REAL ESTATE

This FREE Book tells how you can get cash for yvour property by using the Simplex Plans for selling Real Esiate, which have already sold more than 5,000 properties of all kinds in the U.S. and Can ada. No matter where your property is located, these suc cessful plans will show you how to sell it yourself, without employing agents or paying commissions to anyone. Don’t spend a minute’s time, an ounce of effort or a cent of money trying to sell without first reading this important book, and learning how to sell your prop x ty quickly, economically and Quick Results! at the highest possible price ‘Sold my house within The reading of this book has two weeks by follow ing saved property owners hundreds

the Simplex Plans.”—F. | @d thousands of dollars in com Stark, Wis. ‘Sold for missions, and it can do the cash in 10 days.”— W. H. same for you. As the book is Cartland, Mass. “Sold sent absolutely free, you have my property. Your plan everything to gain and nothing quickest I ever saw. to lose. Send your name and Johnson String, N. J. address at once—a postal will **Sold my home for cash do—and you will receive by within three weeks.” return mail, postpaid, a copy M. E. Lounsberry, Okla. of this important book, without cost or obligation. THE SIMPLEX CO. Dept. 248 J 1133 Broadway, New York by my lots for cash.’ P. Moodie, Ottawa, Cas. “Sold for cash within a few weeks.” M. P. Jones, Iowa

Write for this free booklet It tells how you can rid your premises in three days of disease- carrying, damage-causing, food destroying pests Rough-On-Rats is economical, easy to use—and sure At drug and general stores. E. S. WELLS, Chemist Jersey City, N. J.

POPULAR MECHANICS ADVERTISING SECTION There is a Fortune in Drilling Wells Men with no previous. Sting ex ex erience write us they clear $2 ay with Armetrong Drills — Sriline water and oil wells. Drillers everywhere are months behind their orders! It’s a chance of a lifetime Farmers, engineers, threshermen — men in a!! walks of life — are grasping this remarkable chance to get into this big paying business Get started at once. Armstrong Machines drill more hole at less cost than any ma chine on the market. The ARMSTRONG— built for service since 1867—furnished in traction or non-traction style — operated by our famous special kerosene drilling engine. The Armstrong Drill is a marvel of simplicity, efficiency and durability. 3 right hand levers complete every operation. Many begin- ners average 60 ft. a day. On hard tests it has averaged 92 ft.per through solid rock, using only 6% gals. Tach—leune the profit possibilities s out for yourself. Get full information. Specia! H consideration to men returning from Service Don’t pass by this opportunity. Write right now for Free Book. ARMSTRONG MFG. CO. 514 Chestnut St. WATERLOO, IA. prerverrirete trite hs Serer 3 ; r < z 2 ; $ FH 3 2 4 4 3 4 Z z 4 2 Z 4 A Zz z 4 . wo Meee h! ASBESTOS We are miners and shippers of Crude Asbe in any quantity. We produce all grades at world-famous BELL ASBESTOS MINES Canada. We also card fibres, spin yarns, we: cloths, and make all sorts of Asbestos prod For anything you want in Asbestos, turn to KEASBEY & MATTISON COMPANY Dept. S-3, AMBLER, PENNA., U.S.A. Owners of the world’s largest Asbestos Mines UmakeM thing’ eqeimake &, $80. Toy Ciecon st two large jointed animals with Clown Riders, 19 Wild and Dor kicking and jumping Donkeys with riders, and other Circus Thing 7 red hot Money Maker and several be = onl € k with UmakeM ame time. Fine for families, t Send $1 oy clubs ols DEALERS, BUY CHRIS 7M AS roYys NOW W.R. PRICE, Inc., Dep!. 7, UmakeM Bidg., 127 Sth Ave., New York -_

outfit No. 8 includes 10 good tools, desig

The greatest winter weight underwear value sold in America.

——d Mammoth Jubilee Book F hee Picturing 5152 Home Things Make your own Credit Terms—1 to 3 years’ time SPIEGEL, MAY, STERN CO., 1108 W. 35th St., Chicag«

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x POPULAR MECHANICS ADVERTISING SECTION 179 y! pe MechanicsWanted Thelo [w-foi rela bIST-Ti it -t-t- (COME TO THE SWEENEY SCHOOL of Auto, Tractor and Aviation Mechanics if you really wish to be a trained Expert and to work on the most modern machinery. le £E.1. Sweeney, President TSHE Mil- | 1 Dollar ey School is ring men to from $150 to 1 month in the »bile and Tractor S You owe it to to investigate what in this wonderful busi- you. Youoweit to yourself The Sweeney System at what the Sweeney School FACTS ABOUT THE i . G a SWEENEY SCHOOL |f Cannot be obtained any- where else,just as Sweeney’s Equipment is unsurpassed. System trains you in 8 weeks. Owns Liberty Motor, Hall-Scott, Hispano-Suiza and other government Sweeney Graduates Eligible to Following Positions: oO ter $1,000,000 actually Learn how to repair or make etan Experts se + ete invested: equipment nwo any piece of Mc ichine ~£ | by ircadgameeers 2: > HUBRIS Ul weeeSaeatents ana | doing, the work with your he velding E 2 rts e $1 ieee — at mae and em- own hands under the per- pair I 250 instruct ? Truck Drivers... @35 sonal instruction of experts. per week Jloyes with monthly pay laxicab Drivers . plove we 3 25 per week Trouble Sheetere . $3 per hour roll of $30,000. Train hand and eye and brain Salesmen . - "$3, a year Free medical inspection together until you do the job right. lractor Engineers per day No extra charge Abso- This is the celebrated Sweeney System that has turned out over 30,000 graduates and which was approved by the United States Government in send ing me 5,000 men to train for army mec}! anic cal service. The idea that has built a Million Dollar Tr rade School and made thot yusands SS of men a suc- “Sra cess in life. Demonstrator . . $ii 50 per mone 2 Garage Manager . . . $3000a Year lutely clean and moral surroundings Sweeney Graduates always in demand—at big salaries. It’s the First Step That Counts “Make that step in the right direction. Come to recognized leader. I want every young man hanically inclined to make a real start this year. __ Be ~9 today by sending for my big, free catalog. You yn’t need any previous experience, or any education, because e use tools, not books. In fact, I have a wonderful testimonial om a deaf and dumb student whom I trained in eight weeks. By ‘nding for my book, you incur no obligation, you simply give yourself the opportunity of investigating the wonderful possibilities the automotive business offers you. fy {LARit, ; Lautan} I say it is the greatest opportunity Yr if in the world today, and my free By 4 on book tells all about it. So mail the coupon NOW and get the FACTS.” EMORY J. SWEENEY, Qos em wm a it ce wee President ~~ —— Bide-, Kansas City, Me Mo. v } in New LEARN A TRADE Sg! © Name 4 Address SCHOOL OF AUTO-TRACTOR-AVIATION oa ARB. eagle” 320 SWEENEY BLDG. KANSAS CITY.MO Please Mention Popular Mechanics

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180 POPULAR MECHANICS ADVERTISING SECTION AGENTS 520’. Gold aSilver Sign Letters For store fronts, office windows - glass signs of all kinds. No experie necessary. Anyone can put ther and make money right from the $4022 to $100°° a Week! You can sell to nearby trade or trav: ] over the country. There is a big cs for window lettering in every town. S« free samples and particulars. Liberal Offer to General Agents METALLIC LETTER Co. 433B North Clark Street, CHICAGO, ILL. : AGENTS: $60 a Week taking orders for Thomas Guar. anteed Shoes for men, wor and children. All styles. Bra new proposition— wear and give sati tion or replaced Cheaper and

Sales are easy and profits large with the Ho-Ro-Co Line of guaranteed household specialties, pure remedies, toilet articles and soaps. Every article carries our Flexible steel arch shank. Heel can’t come off. Get start positive guarantee of satisfaction or money back. once, H:z _ a ste ane ome. No capital required. N - a . petition. rite quick for Agency and territory Big oT ap aan Se pee ee eee oS ae tunity for men and women. Be first to introduce this n full or spare time to friends and acquaintances, THOMAS SHOE CO., 648 Long St., Dayton, Ohio Ho-Ro-Co Leaders Heese, oalde,” Bos eat nck c poms AGENTS: $50 a Week He-Ro-Co Skin and Scalp Soap ____. Taking Orders for Peak pleases buyers everyume. | ite pea.|bel | Wireless Guaranteed Umbrella Get our Free Sample Case Offer. Something brand new. Adjust new top in minute Grek $6.50 worth of Ho Ro-Co oS ee v a A o iys in place paren Papa yg sample case " Costs no more than ovdinery kind Biggest seller ever intro- Start now to make money. Two-Year Guarantee duced. No c ati

© competition, Never before advertised. Not sold in stores. Sells

Write today. all year round. No experience or capital needed. We deliver - iy »llect. Commissions paid “ee day vo take orders ork spare time or full time. alter Taylor, of Oregor Ho-Ro-Co Mfg, Co. a . averages 9 sales aday. Write ear, for territory and sam ples

151 Locust St.

Parker Mfg. Co., 378 Rock Sit Dayton, O.

St. Louis, Mo. NAO oa : _, AEENCAVER z ‘ (SAE, Sent? Sop0 | | == se XN BUSINESS a 5 for instruc = ns, de ry UmakeM rpg tice apie iening Ge eka ot cron cea }. mak fe my ing U makeM big annual income in I ty Six fe : UmakeM Club. With the $5 outfit you can Make y- leriot Gur "St saat andl eanar fessional fees, making and fitting a foot specialty to measur Flying, F P "lanes : also re al Work k Be ‘s na Wa rf Stan vd Stationary Ras oka, Beo- readily learned by anyone at home in a few weeks: « ets, oughs rks, Circus n r ke c ail : . Squirrels Flephian its, Rabbits “ “ , ri es, OstriM Money. , wig no agency or solic iting. Address

W. R. PRICE, Inc., Dep!. 7, Umakem aide.. “127 Sth Ave., New York STEPHENSON LABORATORY, i Back Bay, Boston, Mas: «== ADD TO YOUR INCOME $2", 310:.8 8 Qo

EASY WITH Key Cutter New Improved Green Automatic Machine Sharpens, Hones and Strops all kinds of safety razor blades, in one operation, from fou: to six blades per minute For both Quality and Quantity, this machine ie in a class by ~~ itself. There is nothing like it on the market. Let us oom you our free booklet explaining everything, including the “AMERICAN” Key Cutter —cuts square, angular or round slota, AMERICAN SHARPENING MACHINE CO. (Inc.), Dept.6, 184 W. Washington St., CHICAGO

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is all P.O. Box 760, City Hall Station, New York k City ards, ciré —— labels, gs, book, menus, paper, re > Prexe $8 Lar > lab PP ress $1 0. up. Save mon¢ &: WE Print for ers, BIG PROFITS. Ali easy. rules Fe ~ sent. W wy TODAY for press catalog TYPE, le fect fit and tailoring: eatisfactior ND N guaranteed we Money Rack, Sent a ‘ é FREE Rea itiful, interesting ROOK abo .— POPULAR MECHANICS ADVERTISING SECTION 182 if You Can Tell a Lachnite from a Diamond, Send It Back re is € man-made gem that has the eternal fire of the diamond. nds the diamond tests and is guaranteed forever. i your choice of the two illustrated above, mounted in solid gold Just send us the coupon with your name, finger size and we will send you either ring you prefer. ») with the postman. If you le to buy, merely pay the balance at $2.50 a month, Send No Money n it comes make the first small deposit ($4.7 nd, send it back and we'll refund your deposit. total price of either ring is only $18.75, Itis cut like a diamond, Over 150,000 people wear them. We will , on 10 days’ free trial. address and Wear it 10 full days. If you can tell it from a error nan eseessanane anges eeeecerereeearaeececess Harold \Sidhiaen Co., Dept. N19, 1S. Stations Eve Chicago, lilinois : ; Order Today Use the coupon or a letter ora : Send me, pre d ey ring on 10 days’ free trial postcard. Be sure to send your : ene “ = . h : When it comes I will depos $4.75 with the postman rer size. Todo this cutastrip of paper just long enough : After ten days I will either return the 1 g or send you et over the second joint of the finger on which you wish to $ $2.50 a month until the balance has been paid. Total cost rthe ring. Send the coupon now—and nota penny in cash. HAROLD LACHMAN CO.), Dept. A119, "2%, Michiter Ave. Chica,o, Hlinois to me. $18 7 If | return the ring before 1 ] refund my $4 75 immediately. § enclose my finger | size. Name The New REMINGTON .380 Automatic Pistol | | Send for Illustrated Folder. & )Do Your PRINTING cards, paper. THE PRESS CO. D-37, MERIDEN, CONN. » 65 * for these Classy Tailor-Made-to-Order Al n= N i Actual*6™ Value WE PREPAY EXPRESS ess than half price; per- fe enanny Style Rook asurement P bianks. You fect _ fit Remember, only $2.65 for pants, express prepaid. We make all clothes to 1e tsurement Great Money- waking Plan Find ont bow to £3909 a year in re time. Get your “own cult FREE (j «st to make em ask where you gt ney making proposition Gre collection ever of woelen samples 152 latest, most exclusive style fashions—all winners Theda Bara, Annette Kellermann and others in beantiful, artiatic poses end at once osta brings everything Free Write today Sure. Reliable Tailoring Co. 376 S. Peoria St. Chicago Address Agents Wanted! For the “Big Four” Ro-San Sanitary Specialties for Homes Without Plumbing Ro-San Indoor Closet Tvesizes. refer farm for large homes, schools, factories aor irches, stores, et« Ro-San Washstand Vy). inhi bin z Rolling Bath Tub, With Heater proposition just out everybody eager for These four apex Ities will make ny huetler big money. You cun fit out any me ha cou ete bathr We want | wir everyw et present t her part or all of their time = en proposition to me “ ‘ ct t ' i ter ritory d wh un carry small stock A real opportunity is before you This “big four’ means wealth for those who go after it because every farn home wants what we have to offer. Write today Rowe Sanitary Mfg. Co. 6172 Gth St. DETROIT, MICH.

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182 POPULAR MECHANICS ADVERTISING SECTION BUY DIRECT GET BiG BOOK Do Your Own Plumbing and Heating New Cut-to-Fit Plan You can install your own complete heating or plumbing system by this method as well as a practical plumber You save time, high labor costs and un- used materials. All parts come to you Cut-to-Fit with plans and information furnished by our Engineers. Our whole- sale prices save you ‘sy the first cost. Make Your Property Worth 50°: More and do the week yourself. Home improvement is your best investment, Our hot-water and steam heating plants, pipeless furnaces, water supply systems and plumbing supplies are the most modern made. They are Guaranteed satisfactory. Send Today for the Handy Man Book It illustrates more than 10,000 dif- ferent plumbing and heating fix- tures at our low wholesale prices, It contains information invaluable to the property owner, farmer, carpenter or contractor. You can tell just what your improvements will cost. It ex- plains our plan in detail, We have spared no effort or expense in preparing this valuable book. To keep from sending it broadcast to uninterested persons we ask a temporary deposit of 25e which will be refunded with your first order Send for it today. HARDIN-LAVIN CO. 40 Years at 4547-57X Ques Grove Ave., CHICAGO $500,000.00 Factories Back Our Guarantee 89? we ble the Convenience Your Electricity Make every single electric socket do the work of two. Use one socket for both light and appliance. *‘Every wired home meas three or more’’ The F iug of Quality Fits any electric light socket $s At Your _ > OR $125 EACH Dealer’s Benjamin No. 2452 Shade Holde rs enable you to use any shade with your Two-Way Plugs. BENJAMIN ELECTRIC MFG. CO. Chicago New York San Francisco Folding Furniture is known the world over for its neat appearance, comfort, convenience and strength. It’s the A comfortable > . . orch or camp ideal Folding Furniture. Sar: wan’. only 14% Ibs and fold 8 to, z2i°x2 “Gold Medal’’—‘“The Cot of Many Uses” — for emergencies, porch, camp and summer home, there’s nothing better. Light, compact when folded, quickly set up. Sold by Furniture, Hardware, Sporting Goods Dealers—and Tent - Makers — everywhere, For washing and dressing the baby —a convenient, strong dressin ° table. Write for complete catalog. Gold Medal Camp Furniture Mfg. Co. 1724Packard Ave., Racine, Wis. refeleehulay Ne Furniture For Home and Come 25 VL A ee OR SOS 6 Beautiful HOUSES and BUNGALOWS 3900 CAN BE BUILT FOR “AND UP up This and many others in my new book Building Plans for Modern Homes 1 save you hundreds of dollars One of the most compiecte and comprehensive books of plans ever published by any - architect. Fitth edition just off the press 7 Two hundred and fifty floor plans « and FREDERICK A. GOWING photographs of bungalows, etc., costing ARCHITECT from $2 200 up; gives sizes and cost to build, Se st ‘or $1.00 18 T. BOSTON, MASS. Positively the cheapest and strongest light « 4 earth. Used in every country onthe globe. M I and burns its own gas. Casts no shadows. ( l and odorless. Absolutely safe. Over 200 styles 2000 Candle Power. Fullv Guaranteed. W rit catalog. AGENTS WANTED EVERYWHE! & THE BEST LICHT CO., 324 E. Sth St.. CANTON, ‘ af a Cost of 1-8c Per Hour Burns Kerosene or Gasoline This lamp generates and burns its own gas from ordinary kero- sene. “QUICKLIT” gasoline lamps can be lit with an ordinary match >| like city gas. = Write today for illustrated catalog of our complete line of kerosene and gas oline lamps, lanterns and lighting syste ms. A ents Wanted The Nagel-Chase Mfg. Co. } 276 East Erie St., Chicago

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POPULAR MECHANICS ADVERTISING SECTION 183

TO-DAY

| 4 10 | a + | MONTHS | | % TO PAY | © > . . i] o> / The Oliver Oil-Gas Burner ay is an attachment that makes any cooking or | : So) heating stove a gas stove. We cealor wood. Cooks : 4° and bakes better than coal or wood in same stove. WEET from coal oil (kerosene) at one- x } ©* Makes Its Own Gas fourth the cost of city gas. ; IANDS\ / Everybody knows gas means cleaner, cheaper, quicker FOR | PA cooking, and a cooler kitchen. No fires to start,no ashes, j VI RVICE hopping, shoveling, poking and dragging of coal. Saves fj —— I | he of work and loads of dirt. No smoke nor odor. You regu- | st with valves. Simple, safe, easily put in or taken

‘ '§ ply sets on grate. No damage to stove. Lasts i 4 e. Thousands of users. IN USE TEN YEARS. S | SAVE 5 MONEY—FITS ANY STOVE #°.‘evcry stove: Writes Ann | telle how tw : gallo »ne kerosene equals eS ‘ | seven pounds of coal ‘> H : $ ' " Ol wer Oil. Gas Burner & Machine Co. ‘<) ~~ < 2014 stern Sh Sen Prancioce vw * Sf | © Ladies Diamond Solitaire Ring | Western Shipments From San Francisco Examination FRI”. $502) . This exquisite, blue-white perfectly cut Diamond, in ladies’ 14K solid-gold setting will be sent FREE of charge, all charges prepaid, for your A examination. Then, if you sélling the Famous Improved decide to keep it, pay only A E-Z Self-Heating Sad Iron. No $5.00— balance at $2.00 a experience necessary. Zasy to ¢ MONTH month for ten months. Buy- demonstrate, Possibilities untim- et ing direct assures yout ited. Every woman a prospect 3 Rock Bottom Price, on easy credit terms. Satisfaction guaranteed. Abso- Take advantage of this amazir ig offer lutely safe. Thousands in use. Sample TODAY! Only $2.00 a month after you ase free to agents. Write for particulars today. have e . — } M Z *xamined the ring and find it all and more | eeeeaae Toot & Metal Works, Dept. 10, 128 $. Clinton St., Chicago than you expected. We are the on N jewelers in America that allow ten months’ credit. SWEET’S 10-Acre Farm, Good Loam Soil policy: You must be satisfied or no sale No Security! No Red Tape! =n ee f a 3-room house, 100 chickens, f aos Aa £7; overlooking 2 beautiful lakes, We Gladly Trust You ‘Ve .2 = -\»} near Hart and Shelby, Mich., nih ™r surrounded by splendid farms Free | and orchards — only $595. Send postal for Greatest Pentwater Beach Ass’n 838 Reaper Blk., CHICAGO | Diamond, Watch and Gift |; Book ever published. // Let us send you FREE, } this beautiful De Luxe Cat- alog No. 6 L; also reque blank which enables you t

MEN AND WOMEN AGENTS GET OUR FREE Sample Offer and let us tell you how to yY start a big paying business a Week

| order above ring or any = ; other article of j« velr FREE EX. Smooth-On Household "| AMINATION Nomoney inadvance. Ten mont! ~ j to pay one thing. Get the beautiful th g Iron Cement No. 1 you want NOW pay lateron easy credit term: | Stone } ——o : Write for details of Great Ring Offer, Request | . ops | ,ousehold leaks, cracks, Blank and Free Catalog. Address Dept. 6L. | or breaks in pipes, stoves, fur- , naces, sinks Repair perma- | Capital, $1,000,000 { nently with SMOOTH. ON—a putty like : ent “THE AOUSE OF QUALITY” LW-SWEET INC.| 1650 - 1660 BROADWAY, NEW YORK.

a af Shin mcmama E OS oe acl - SMOOTH-ON MFG. 00, ’ 30c. Jersey City, N.J., U.S. a,

Please Mention Pop ilar Mechani«

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184 The Miracle of the ** Many Waoneien in One” Over 365 Different Type Sets Put the “Miracle” to Work for You Pull your writing up out of the commonplace. Get added power through the marvelous type changing feature of the Multiplex —forceful expression— just as you would speak, TWO STYLES OF TYPE, or tno to five different Languages, carried on the machine AT ONCE. "JUST TURN THE KNOB" and change instantly from Roman Type, to Italics, or Miniature Roman, OV OU deautipfut Zorrht Jy} ne Write Today for “The Miracle of the Multiplex” It will show you that the Multiplex is invaluable to the enyineer, the chemist, the mathematician, as well as the business man — show you the technical signs and symbols as well as the many types and languages available with this wonder machine of the world, Write your name and address on the margin of this page NOW and mail the margin to HAMMOND TYPEWRITER CO. 569 A East 69th Street NEW YORK CITY To get the greatest enjoyment from | your pipe, be sure “It’s a W D C.” | we. DEMUTH & co., New Vork wy | J [STUNTING Model Airplane ZN _ Complete 30 Cts. »e flown or stunted either in- outdoors nd fe pre f or ne xt rainy ds doors, This little airplane will pe any stur at at will, just like a real plane I jral, Stall, Spin, Make Per ven Gham flown in the par to /y an aviator, and ia auickly t. Amusing «a 1 young drawings an d parts se p. pe Se ad M. yney Order, Coin or Stamps to Indoor Model Airplane Co., 536 Taylor St. Washington, D. C. SEND for CATALOG P23 7S THIN, TR It will be pocket size, 8x44, and will / contain 248 pages with over 1,100 illus- trations, describing in plain, clear lan- wrod ail about Bells, Push Buttons, atteries, Telephone and Telegraph Material, Electric Toys, Burglar and Fire Alarm Contrivances, Electric Call Bells, Electric Alarm Clocks, Medical Batteries, Motor Boat Horns, Electrically Heated Appar- atus. BatteryConnectors,Switches, Battery Gauges, Wireless Tele- graph Instruments, Ignition Supplies.etc, Send for a copy now. Manhattan Electrical Supply Company, Inc. New York, 17 Park Place St. Louis, 1106 Pine St. Chicago, 114 So. Wells St. San Franci . 604 Mission St. POPULAR MECHANICS ADVERTISING SECTION A Scientific Solution of the Sanitary Drinking Water Question Holds 75 lbs. of Ice. Supplies 150 Men. Fifteen and one-half circu- lating coils of pipe in the cork-jacketed ice tank in- sure an ice-cooled sanitary drink to every employee. The quality of the ice is im- material, as it does not come into contact with the water. This construction reduces the amount of ice and water re- quired toa minimum. Send for Our Complete Catalogue showing our line of Wash Bowls, Metal Lockers, All Steel Stools and Chairs with Inset Wood Seats, Stock and Storage Racks, Metal Shelving, Metal Vault Fixtures, Improved Soda Kettles, 40 and 60 gallons, Water Heaters and In Mixers, Bubbling Drinking Fountains, Work Be ~nche: Legs, Drawing Stands, full line of Plumbing Fix Manufacturing Equipment and Engineering Co. 136 Federal Street Boston, Mass., U.S. A Works and Mail Address, Framingham, Mass. IF IT ISN’T AN EASTMAN IT ISN'T A KODAK MANUFACTURERS There are very few large manufacturers who cannot Paramount Industrial Picture to help sell their goods bilities are tremendous. Write for booklet. Famous | LASKY CORPOKATION, Fifth NEW The KIDPHONE Adaptation of the THERMOPHONE Metai Fou pment For Shap 485 Avenue, Yor! A complete, serviceable telephone, for fu or serious purpose, indoors or outdoor Price $10.00 Complete MURDOCK No. 55 e 7 Radio Receivers 2000 oh 3000 ohms = doubio ~—— $4.50 double set 9.50 Best low priced radio receivers in the world. Money back guarantee. Order NOW for quick delivery. Send for copy of Bulletin 19B. RADIO BLINKER SIGNAL SET Pat. Sept. 4 For individual instruction in sending or receiving me means of sound (Radio) or lg er) signals. Officially adopte Navy, Massachusetts Institute ot | nology and Boy Scouts of Amer by U.S. Army and U. S. Marine ¢ Price $5.00 "0%" AMERICAN THERMOPHONE CO., 114-116 Bedford St., Boston, Mass | WM. J. MURDOCK co. 10 0 Carter St., Chelsea, Mass. 4 Manufactured solely by Frank B. Perry & Sons, Pawtucket, R. I. Ges

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ee om enn te POPULAR MECHANICS ADVERTISING SECTION 185 Sy and Fly Model Aeroplanes Learn about Aeroplanes and how they fly. Build a Model Aeroplane that will fly likeareal one. With IDEAL Scale Drawings and Build- ing and Flying Instructions you can build exact 3ft.duplicates of famous planes. Send now for Drawings and Instructions for the one you want to build. * ye "N C-4 (4', Ft.) Naval Curtiss Seaplane DeHavilland Battie Piane 3N4 D-2 Curtiss Military Tractor _Bieriot Monoplane EACH Taube Monoplane Postpaid Catalogue ot IDEAL Model Rereplence. and and Susolies, S cents if you Cor.W. Houston St. .New York write once; regular price 10 cents. | ial Aeroplane > Supply €o., 159 Wooster St. owner of an Amateur Radio Set ! have this 64-page book illustrating ribing the newest DeFOREST devel ts in Radio Apparatus Contains mach e information about wiringdiagrams, Type Receiving Sets, indi vidual instru om plete apparatus with and without ets and many other features you will know about. Send L0cents instamps et a copy for your Radio Library DeFOREST RADIO TELEPHONE / AND TELEGRAPH COMPANY 1391 Sedgwick Ave. NEW YORK — Buy American Made TOYS 1 TOY MFRS. OF U.S.A., Inc., Flatiron Bidg., NEW YORK CITY $a Vew Big No.14-200pp. Wireless ind 100 pp. Electrical Catalog Wireless catalog any oy oo 12c — Yack Co. electrical catalog for 6c. You may de- The Wiliam b ; duct this amount onfirst $1.00 purchase. ANYTHING Catalog not sent otherwise. Any wire- — less amateur will tell you it is the one catalog to have. As an encyclopedia of information it is invaluable. The largest and most elaborate radio catalog published Valuesthat cannot be duplicatedelsewhere. THE WILLIAM B. DUCK COMPANY 223-227 Superior St. TOLEDO, OHIO ee c writing paper; v7 hes vedas write with re ¥ “CHEMORAFT t ture hemical outfit; co left. Se for y or outhit right | n and get Chemera t a Fy di an inte res aine Se ow boys ph Amateur Chemist's Catalogue and Hand Book §=8JIINIOR ‘ ning much valuable informa r Roy Chemists and listing ny useful chemi gat d appa s. sent postpai None fre Regular ‘ HEME “RAFT ? Outfits. £1 50. $3 $10 THE PORTER Suamneas. co., HAGERSTOWN, MD. POSTPAID , Be an American Ship Captain Here’s summer—fine steel boats just like the sport for spring and the real ones, that are driven through the water by powerful, long-running motors and fine screw propellers. These are beautifully painted merchant marine steamships (the Hog Island type), ocean liners, tugs, yachts, launches, swift destroyers, scout patrol boats and real sub marines that dive. These boats are, with out a question, the finest boats made that run by real machinery. The boats shown in the illustrations are Ives. Ves tie) @ Nasty @ Think of the fun you can have with Ives boats—a whole fleet of them. You can have harbors, docks, wharves and freight sheds, at the seashore or beside some pond or brook. You can learn the great game of transportation, sending your cargoes to different ports. Get this book Write today for our fine book, “Ships and Shipping.” It tells all about the E sea, its rules and regulations, the parts ; of a ship, nautical terms, signals, etc. Send four cents to pay postage and packing and write your name _ and } address clearly. b\ ' The Ives Mfg. Corporation 202 Holland Avenue, Bridgeport, Conn.

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186 aWeek Pays ForA Black Beauty This Magnificent Wheel can be yours without delay. to save up cash. Write today for Lilus- trated Catalog, select your model, and the Black Beauty will be shipped right away. Examine the wheel, and if you decide to keep it, make a small deposit, then pay $1 a week (or $5 a month). Direct to you from our big factory at Wholesale Price. No waiting 40 Styles Send for Catalog Shipped on Approval We Pay Ne Freight eig Think what a bike will mean to you these rlori ous *pri days! Think of the places you ca: co in a hurry swimming hole, camping spot shady no« e Black Beauty | racy lin ful whee! whole bunch will env y you. Many Exclusive Features Nothing outside of a motor car was ever so luxuriously equipped as the Black Beauty a k at this! $10 Firestone Bloe Non-Skid ires; New Departure Coaster Brake; m storcycle b = saddle. chrome stee! ball bearings. etc. Repeir Kit. Veal Gate ond itand FREE. 5 bag Guarantee and 6 Montns* Accident Insurance G same Sundries : = sh, lee Bar Haverford Cycle Co., Dept. 376, Philadelphia our fac ries Catalog. Please Mention Popular Mechanics POPULAR MECHANICS ADVERTISING SECTION Roofing Tere) 4 , : World’s Best Roofing at Factory Price Don’t buy Roofing of any kind —_ you get our big Fr ing Book, deceri bing full lineof Edwards F amous — ‘ Galvanized Roofi nes, Sicing sand Ceilings, and our lo prices. Then see for yourself how much we eave vou b ‘ direct and saving you all in-between dealers’ protite EDWARDS al Shin Metal Shingles pe | rust proof. By our patented “‘Tightcote’’ edges as well] as sides of metal sheets are heavily coated with not a space the size of a pin point exposed to weather. Fir lightning proof. Outlasts three ordinary roofs. Forever wi weather proof. Need no repairs—end all roofing expense. | INTERLOCKING DE 3 water tight seams—all nail heads co: —no chance for rust or leaks. EDWARDS Galvani-ing Test Edwards ‘“Tightcote’’ Galvanized } can be bent, twisted or y lightning, and the galvanizi: i not crack or flake. Bend it or it—you can’t loosen or t anizing. Noothe wernives izedr ing can withstand this test. Low Priced Garages wid e variety of otzies. af all sizes of Portable firegeo of —_ ; — tal Ga arages. prices ever made ostal = m bri ae Big ¢ rarage Catalon’ free. f > a, FREE. Samples & | . Roofing Book for free ry and proof that we Write Today £ can save you a lot of money on kind of roofing siding ore ee you may ne for Roofing Book No. 6! THE EDWARDS MFG. co., 600-650 Pike St., Cincinnati, O. Good Tires for Less Money Suars"*er¢*°°° tires are reconstructed in our factory by our own dependable Size Tires ubes Tires 0 $ 5.45 $1.60 .$ 8.70 $ Ox3h. 6.4 i, 75 Zz 9.95 SIaNty. 6.70 $ 10.95 Sx3h. 6.95 11.45 Ix4 . 7.95 12.45 jlx4 8.20 12.70 o3sx4 . 8.45 13.20 Reliner Free — each tire. aratances oO.D jeoet Soearannne at Se nd fuil + ane rd save liscount. De SERVICEABLE “TIRE CORPORATION, 3254 indiana a Ave, Dept. 105, CHi AGO, ILI $2 de posit. for each tire | mm. State ——s g | Perfect, new tires, all sizes, non-skid or | fabric or cord. Prepaid on approval a 10,000 MILES GUARANTEED 30,000 Customers. Catalog Free AGENTS Wa? SERVICE AUTO EQUIPMENT meee 911 Service Building ANSAS CITY, STANDARD. MAKE USED TIRES SAVE 75% ON YOUR TIRE BILL Biggest Tire Bargains Ever Offered SIZE Used Tires New Tut BO ZB ccccccccccce S$ 4.50.....+++-- $1.75 50 = B36 ..00- | See 190 BZ ZK BMG... cecccces Wiesecvcescan 2.00 SM dipeeseion 7.00 2.05 of eee 7.50 . 2.15 UAE? Sk eckcuictssionacs BU cecesees 2.25 _ Fy (pea eagesoee 2.35 eeesonees ieaewsaee 2.60 ST eee 10.00 2.65 36 x 4% 10.00 2.75 35x5 10.50 2.85 7 Peer i iecctaksenes 2.95 Send £1.00 deposit for each tire ordered, Balan ice C. O. D. subject to your examir tion State whether S.S. or Cl. is desired Dis ount f & per cent when full amount accompanies 0 rd rT. Goodway Tire Cos, dev:P'cuicnoo. tu ake 2 IS BH

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POPULAR MECHANICS ADVERTISING SECTION 187 — { “Excuse my dust” Note the ease with which the rider of a Johnson Twin takes the grade. He doesn't push—just coasts, while the other fellow pedals. You bicycle riders can quickly mvert your bicycles into a two- cylinder motor bike by replacing your rear bicycle wheel with a Johnson Motor Wheel. This is the only two-cylinder motor in the world to drive a bicycle. , Strong enough for any man, light | enough for women, simple enough for everybody. It has a speed range of 6to 35 miles an hour. Travels 00 miles for 10 cents or 150 miles ona ¢ ge allon o f ge asoline. Go where you want to go—when you want to go— in comfort and at a cost less than car f let us send you name of the dealer and interesting book- let containing complete specifications Johnson Motor Wheel, $ 97.50 Johnson Motor Bike “140.00 F. ©. B. South Bend, plus war tax > THE JOHNS ON MOTOR WHEEL COMPANY 904 East Sample Street South Bend Indiana IVER JOHNSON The SAFE Revolver a Send for for Catalog | | Westfield M Mfg. Co. Bicycles Dept. 15, WESTFIELD, MASS. bie > 4?) ee 239 2 —genuine inner armor for auto tites. Double Fh mileage; prevent punctures and blowouts. Easily applied between casing and tube with- W out tools, in any tire old or new. Distributors and agents wanted. Prewious selling experience @ a unnecessary. 25.00 profit per day easy. Details free. Big Profits, Sales Guaranteed. Good Service. American Accessories Company Dept. 223 Cincinnati, Obio $40 Motorcycle | Your Chance to Make Big and used "motorcycles in the Profits in Vulcanizing country at the lowest prices. Ev ery machine uaranteed Send Here is your chance to get intoa for catalog. e are the largest highly ~ ifitable business which will and only exclusive motorcycle supply house in the world. meé ake y n sop nder High class Repairs a Specialt Send us your machine to be over- vulcanizers are n demand eve : hauled sobore and castings for airships gos railway where. Many four graduates make t velocipedes. WE EXO HANGE MOTORCYCLI wt poten dag be m¢ wv tea . e make the Anderson ateam vu! 2 HARRY R. GEER CO. 888 MeLaran Ave., St. Louis, Mo. cauizer and Anderson retreaiJer and — teach the famous Anderson Method of valcanizing. Our studen s make good because they can arge Storage Batteries Scat sree er machine and method and do ‘ one-tenth the cost re red t 1] For Convenience or Profit copes gly ay From any alternating current lamp socket with ee ae Salle teem oe | the Cambridge Rectifier. For home or garage invite you to ¢ re the Anderson oe om ‘ ' ke 1 method with other | use. As simple as turning on a lamp and fully 6 yg a eee id | guaranteed. schools of valcanising othe 5 | for teaching the Anderson method of vulcanizing and retre F | Quickly saves its cost and doubles the The course requires 5 to 10 days and costs $20, If y« g | life of your battery. Always ready Anderson vuleanizer we return your $20 and pay you $2 per d Pp | when you want it. Rectifier caponse money whih ° hie 'e _ : : Our reputation is valuable e expect Anderson vulcanizers t 4 | Bulletin R sent on request. do work which will outlast the rest of thetire. We expect And | 4 y eon studente to succeed in a business wa Their success i« our — Y of Wireless success. Therefore we do not sell an Anderson vulcanizer to elegraph Apparatus anuone who has not received our course of tnstr sent for 3 cent stamp. Don’t miss this opportunity. Write today for full 1 —% ulare and ad:iress of Anderson school nearest to you Clapp- Eastham Co. . ANDERSON STEAM VULCANIZER CO. 130 Gain St.,Cambridge,Mass. tevy Choreee’ Price. 20 2 WILLIAMS BLDG., INDIANAPOLIS, IND., U. S. A. Print your name to avoid mistakes,

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—- @ z

SEES; a 4. BF ye EF on Pe nwa New STROMBERG Does it!

POPULAR MECHANICS ADVERTISING SECTION

S—- eee eer ae eee es af y 7 % a V% Sf sie Pe ere

%, 4 ~ i: S Heavy roads—Rain—Slush Sticky mud halfway to the hub. The meanest kind of conditions, Then is when the New Stromberg Carburetor proves its value—proves its economy—with a cease- less plunge of power that takes you where you want to go—at the least cost of fuel—of time and of engine wear. That applies to any car— any size—old or new. Write for literature. State name, year and model of your machine. STROMBERG MOTOR DEVICES COMPANY Dept. 614 64 E. 25th St., Chicago, III.

oy -W- 7-10) -1 a ge) -)

STANDARD Size Tires 30x38 $ 6.50 30r5% 7.50 B2x3% 9.00 3lx4 9.50 slx4 10.50 33x4 11.50 34x4 12.50 3 1 rear. Comiortable, easy-riding. - Dealers Wanted S J .08 in-wheel bas:

Immediate deliveries. Fifth succe ed ontpnt. Libera f year Ir a aper advertising in dealers’ territory. Wonderful o rtunit Write THE SENECA MOTORCAR CO., 26 Seneca Factory, FO' TOR!A, Ol

SHALER An Easy Way to Make Money Don’t be content to plod along on a small salary. Be in- dependent. Go in the tire repairing business and make $60 or more a week One man made $45 the first day he received his outfit. Others are making $25 a day and hundreds of wide-awake men are making $200 to $500 a month. , ; No experience needed. We teach you how Very little capital required. But slight risk, as every car owner in your town is a possible customer. Jobs are plentiful because tires blow out and puncture every day. Business is good the year round. Tire Repair Outfit, $75 Will do as much and as perfect work as the big $250 to $500 vulcanizing outfits. A boy can vulcanize perfectly with this simple machine. It's the only vulcanizer that has Automatic Heat Control. It must vulcanize just right. It can't undercure or overcure a tire. Requires no watching or regulating. You can learn to do expert tire vulcanizing in half an hour with the Shaler. WRITE FOR FREE BOOK “#©W 70 OPEN A TIRE REPAIR SHOP” and complcte Catalog, which gives full information WRITE QUICK BEFORE SOME HUSTLER GETS AHEAD OF YOU. C. A. SHALER CO., 2005 Fourth Street, WAUPUN, WISCONSIN

Sa ae

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POPULAR MECHANICS ADVERTISING SECTION 189 7 Whoa! Garco knows that word FOR sreatest cooling effici- ency, vadiator walls are made thin as paper. The . . ’ ,) Pod - most water passages are not over Obedience = Garco 8 , 1/16 of an inch. And there are an noticeable quality. It doesn't eeey, SAE LOO seiate thet ma; ak. “X” Liquid makes permanent hold you back when you want repairs everywhere. Quicker, safer full speed ahead: it never fails and more economical than soldering. > u feel like Sihadleoas to respond when yo EGLECTEDwater cooling systems a hurried stop. are being eaten away by Rust se : Layers of Scale bottle up engine heat, Garco Asbestos Brake Lining is easy causing overheating, scored cylinders, to recognize. The name is stamped seized pistons, pitted valves—and on every second foot. That is your great expense. “X”’ eliminates and assurance of 100% good brake service. prevents Rust and Scale. Your dealer has Garco or can get : . ; it for you. Why “vy Liquid improves General Asbestos & Rubber Co. engine performance! Charleston, S. C. | ~ F some car-owners would pay a little more atten- NEW YORK CHICAGO PITTSBURGH tion to the car’s cooling system—they would have less engine trouble to worry about. The § /R2 water circulating system is the breeding spot of trouble that often reduces engine performance 50% ASG BE RS C¢ . The big job of “X” Liquid is to repair le: aks anywhere in the system Na y happen. It does that quickly, efficiently, B RAK E LI NING at less cost than solder and without laying up the car eff t if you en “X”’ is kept const , > water it Drez . . SPRING FEVER seis Saeeat eet iiten ones cnt, |, But. if °X” is kept constantly in the water it prevents leaks and economically obtained by the use of the before they cause trouble $1 5 F-F BATTERY BOOSTER Equally as important as repairing leaks is the efficient Bantam Type 6-6 ampere 6 volt battery $15 . > . . ¢ ’ son ' “ 2 P = . . Bantam Type 12-5 ampere 12 volt battery 20 manner in which X loose ms all Rust and Scalk irom the Operates from 110 volt 60 cycle A. C. lamp walls of the water circulating system. And while “X”’ is socket. Complete with Amme ter and Hat ‘ - h tery Clips, weight 10 pounds. Inchude kept in the water no new Rust or Scale can form This saves Postage ar d insu rance charges with re ye mt > ring . a nittance on st Shipments. | Circular oil, gas, and improves engine performance. gives fati information on these and a ; - jig 4 eration from A Pune Buy the genuine X Liquid today Make tl whole THE FRANCE MFG. CO., Cleveland, Ohio season free from cooling system troubles, J ° ** v , Not a Radiator Cement! “X”’ is not a flaxseed meal or My scientific liquid \ process that repairs and In 1M es all water cooling systems Over 25,000 good dealers sell ’ Liq ul id The bis \'' 8 On every can of the genuine, LARGE SIZE, $1.50 Will'so= $25 FORD SIZE, 75c repair job! “X” Laboratories, 25B W. 45th St. New York - EXPLOSION WHISTLE The hazards of motoring are increased 5 : ee * by defective warning devices. The 2. * signal that cannot fail is the Buell Explosion TRADE Whistle. Over 200,000 in use; 10 year guar- _— iqul antee. asily ins $i i ; Easily installed, simple in operation, requires attention. ite direct. : quires no attention. At your dealer or write direct makes all water cooling systems Buell Mfg. Co. °°2*3S:°"* Chicago LEAKPROOF -RUSTPROOF ¢§ OOF Please Mention Popular Mechanics

Page 318

POPULAR MECHANICS ADVERTISING SECTION

Make Your Truck Dump Bodies Pay Dividends | : by Installing a

Easily Operated by One Man COLUMBIAN LIGHTNING HAND HOIST ; **With a Giant’s Strength’’ It is fast enough to elevate a Dump Body 50 degrees in ty minutes; powerful enough for one man to dump a 5 ton load; compact enough to fit in an 11 inch space behind the driver's seat; adaptable enough to fit any chassis, and dependa! 5 enough to give you the consistent 365-days-a-year sort * service that means increased profits and satisfaction to y

PEE LOL OPEL OLE LORLLPLLEL ELLE LEVELS “2 (Patent Pending) Write for our illustrated folder No. 88. COLUMBIAN STEEL TANK CoO. “TANKS FOR THE WORLD” Since 1894 KANSAS CITY, MISSOURI, U. S. A. PLOLOLLLELLLLLO LL LOLS? GREB RIM TOOL BEACH FAY SENOS “Grey Tire Remover snd Roplacer a pomp, report returns of from 18 to 25 miles s iringt ed on cle yire ee ee iil

PPLE?

SPP P PLS

Oakland Sensible Six owners regulars

Try It for Ten > from the gallon of gasoline, and from

Days nd you are bound to have Ce Le PAL 8,000 to 12,000 miles on tires.

» the marke ind save time, troub! dr ° Fen ORY S TaN i Hae them we will Send OAKLAND MOTOR CAR CO., Pontiac, Mich also make the Greh Automatic Grip Puller THE GREB CO., 193 State St.. BOSTON & AV ee ] / 2 You Can Save $50.00 By recovering your old auto top frame yourself. We make . these recovers to tit all makes

and models of cars Any per- $ 46 and up M - _ - son that can d:ive @ car can Pa Your “GAS” and ALL Your Trouble. put it fe, We furnish instrue- exe fos! f t d quarte 15 D F Tri ] Money-Back jar to er Pg wt ag fasteners, + welts and tacks. A - le G us the name, ye i model number c yrur car ay ree a Guarantee te ils send sve u ol +. a = mrue with camel jes ar # yp te you exact price Entirely NEW principle not a LIBERTY TOP & TIRE CO., Devt E7, Cincinnati, O

moving part— Simple. Has the CARBURETOR | | | Great shops. temence variety Aiways an tana

vA Doubles Mileage—Guaranteed to start We Are the Original car in zero weather — No Priming, “ ; . ” 50,000 delighted users. Now ready for Ford, We Tear ’Em Up and Sell the Pieces Dodge, Maxwell and Overland. Over 100 Makes and 300 Models on Hand DEALERS — Service Stations, Salesmen: The “U. & J.” ——< decactiattiations —teeaiiod te thirty minutes—some Save 50% to 80% on Replacements go open territory. - We also manufacture the U. & J. FORD TIMER. Send for Latest Prices! Will last as long as the car. PRICE $2.50. Every Part GUARANTEED or Money Refunded. Write for What You Need. U. & z CARBURETOR C0., Dept. 225, 507 W. Jackson Blvd., Chicago AUTO WRECKING COMPANY, Dept. P, KANSAS CITY, MO.

The Original—“* We Tear 'Em Up and Sell the Pieces.” Please Mention Popular Mechanics

Page 319

The Aermore Exhaust Horn is the on mobile Signal that Auto ously sounds a clear 1 vurte r of warning rich, harmonious | vord whil trong and penetrating does not anger nor frighter rhe Motorist conte dias with heavy traff pleased with the Aermore because its sig val i ways heard above “the most confusing street noises | Aermore prevents accidents on busy t h pe i is operated by the exhaust gee from the « gwine,is noteasily cloggedand ts free f ntrou ble me batteries, wires or movable parts List Price No. Ie 15 5 inch Aermore Horn, outfic n plete ” Cara yt P. and over .00 List Price No. 2 13 cousinse inch Aermore Horn, out for cars of $9. 00 ) Aermore it orn »t Always give cannes “dime nsions oO &xhaust pipe when ordering THE FULTON CoO. 5th & National Ave 50¢ List Price No. 3-11 inc complete for wery am other light ca Milwaukee, Wisconsin ter riding comfort than anything on the market at the remarkable low « cost of ~~ S8O0c each. Perfect ubrication, preve atop the equeas | each avoid bro » a > SAVE REPAIR (( ) BILLS . - Quickly snap ito — “ = springs — no bolts or “ automatic in operas ee All sizes forall cars. Maile n = = receipt of price Money back if not satis _ actory. ¢ i territory open for live agents VAN SPRING OER co., Cone. P.M. 222 No. Wabash Ave CHICAGO, HLLINOIS © Automobile Springs with Van Spring Oilers cive bet 2 Winton Six | Make your choice a Winton Six and you will be a thoroly happy motor car owner. Write today for descriptive folder THE WINTON COMPANY i 945 Berea Road Cleveland, Ohio | ] FROM THE START Every auto owner needs frequent tire re pairs. Badger Equipment makesthe work quick and easy. Small investment pute ou into a business of your own, paying up to $200.—$300. a month WE TEACH YOU FREE No experience needed. We teach you at factory or by mail. Show you how to get the business and handle your shop. Best System, best machines and money -mak- ing FREE AID SERVICI Tells how to get into the Write for Catalog Tells how. to, get, Hull iescription of Badger outfits. t's free—write. TIRE | eg yn een, He co. . Wisconsin rQ | fie ak ing Pays ’ By ‘Oy HB cs.\ bw DD NN Owners , \: Know the GY REALFACTS About Battery j Charging Profits Read What They Say: Maxwell Garage, Lovington, Ii! ( 7e weekly in- come from battery charging is $40.00. to $50.00. It costs us ibout $10.00 per month to run « Charger $40 00 a week en't bad profit, is it Flectric Service Shop, G. W. McGee, Hamburg, Average monthly expense for currert, 87.00 Average monthly income from battery charging, 160.00." Linah Battery Co., Carlisle. la Average monthly income from battery harging, $135.03 Average monthly expense for current, $21.08.’ Southwest Auto Flectric Co., Tucson, Ariz.: “Average monthly income from battery charg- ing, $165.00. Average monthly expense for current, $40.00."" Adams Cooper Sales Co., Fort Smith, Ark ly income per month from charuer is $120.00—cost $16.00.” iamilton Battery Co., Hamilton, Ohio: ‘Income per month, $200.00 to $240.00 —cost et month, — to $30.00." Eureka Storage Battery Houston, Te ‘MY AVERAGE IN COME PER MONTH FROM “THE “CHAR GER is $500.00." YOU, too, can have BIG PROFITS just like these You can do + ry, because this season is the biggest‘ever known in the battery charging business. Owners are demand ing reliable battery service—the HB kind-—and you can get this business, if you want it. With an HB G anges: . it costs you Lik batteries and the customer pays 75ce for BIG PROFITS! HB Chargers have no delicate parte to wear out, no burn outs or expensive renewals They are built for years of hard, steady, money-making services It«pays to get HB Equipment. because it will be running for years «efter less efficient chargers have been discarded Small Cash Payment Starts You in this Big Business HB Chargers are sold on long, terms extending over almost a year’s time, and you can have one to suit yonr needs exactly simply by making a small payment. The protet« from our battery charging should easily pay the balance, and leave a nice surplus every month. The HB Easy Payment Plan isa complete guarantee of satisfaction to you, be ause we could not sell on euch terms unless HB Charrers mace gocd tut we go etill further, and sell to you on ten days’ trial. If vouorder an HB Chargerand find itis not suited to your business, vou can retarn it any time within ten days and get your money back Choose the Size You Need USE THE COUPON! to 15¢ each to charge to $1.50. Think of that @asy There is an HB Charver to suit any size battery business. Pick the size you need and mark across onthe picture in the Sonne. Then tear ont and mail Remember, you run » risk t make BIG PROFITS right from thestart Send tl TODAY. — — — — —TEAR HERE— — — — — HOBART BROTHERS COMPANY, Box M67, TROY, OHIO Send me complete marked (X), i ietails Information about the of your Fasy Paymer NAME ADDRESS ad

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POPULAR MECHANICS ADVERTISING SECTION REPLACE BROKEN CAR WINDOWS MEND LEAKY ROOFS WITH ete Anyone can stick this window on like a tube patch without tools or extra expense, without removing back curtain, without loss of car’s use. It lasts longer, no stitching perforations to weaken celluloid. Window frame is finished with auto rubber, mohair, or imita- tion leather to match your curtain, Stiktite roof patches are also BUICK HUDSON finished in goods to match your $}|O0 top material. Box contains eleven sizes for instantly mending holes and rents. Ford 40c, Mohair 50c, Imt. Lea. 60c. OVERLAND OAMIAND See your dealer or send his name with order. DEALERS: Write for suc- cessful plan that brings you new customers and easy sales. The Cincinnati Auto Specialty Co. The Stiktite Co. 306 Hammond St. Cincinnati, U.S. A. We are experienced in handling foreign business. The Stiktite Lily-White Tube Patch is the best tube repair because no heat or friction produced in the tire can loosen it. 50c and $1.00 size outfits. Third Sou “Checks ae Res bona The rebound is more to be feared than the shock. The rebound breaks more springs and is more to blame for vibration damage than the shock itself. The famoi Float-a-Ford “third spring” checks the rebound. After the main shock, it gent restores the car to normal. Float-a-Ford shock absorbers do not bin interfere in any way with free action of the I springs. They do rot bump the lamp parts dy. Easily instrlled without boring a s hole in frame or axle. RURPEE-JOHNSON CO., Mfrs. 307 Kentucky Avenue Indianapolis, tnd. Tet way YOu Me were PLOnT Pv yy! Build This Car This nift driven by gax SYPHER WFG. CO 146 Sypher Bldg.,Toledo,O DOUBLE MILEAGE FOR HALF COST | ae possible by our special retreac’ng preress. Fv shop Guaranteed 4500 & Iles Basis, Standere Guerantes treaded tires are used tires retrea: ed by our pio « ~- Tire Tube| Si 7 s - 25 a a4 Sons. 6.50 3 - 650 in 76 . 6.7 1.85 . 700 2.00) 34x4 00 #200 2.25 RELINER FREE with EVER TIRE In addition to this offer wegive you alro a new Mil factory price with every tire ordered. When orderi asta you want straight side or clincher at or non-ski deposit for ear f tire balance C.0 b. allow a special cash Ciscernt o ons with order. Order Shipped Day Received. Send Sapasiie Tovay Satisfactory Tire& Rubber Co., 2551 Indiana Av.., Deo!. 148 Chic ‘gO »-genuine inner armor for auto tires, Double mileage; ff prevent punctures and blowouts, Easily appued without tools. Distributors wanted. Details free, American Accessories Company Dept. 220, Cincinnsti. Ohio} We want one exclusive represe ative in each locality to use ar ae sell -Ply, hand ma oe new Mellinger Extra. —an l seconds. ) Shipped prepaid on apprové al ~ Z ple sections furnished. Do not buy tn get our Special Direct Prices. Write BE MELLINGER TIRE & RUBBER CO., 946 Oak St..Kansas City, Me

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POPULAR MECHANICS ADVERTISING SECTION

A

—— a —— eT = a=: ane for All FORDS -An e; Any Year Electric Sta farting and Lighting HERE ‘S the new Heinze- Springfield complete starting and lighting system, ready to install. Fits every mude!—insures a quick, positive start at the touch of a button and keeps lights steady e'!l the time. ” HEINZ=-SPRINGFIELD ~ Valcanize FORD Starting-Lighting System # Equip your car this spring with this reliable = Your Tube Punctures Me Se . — d sohboned, Ravepthonalie low tn oelee "7 In SY Minutes mply and easily installed on any Ford Car. ji Ve make quality equipment only, 3 a oR sven, MUNIN tate 0

mul Ma oe Over 1,000,000 motorists carry the Wethe for simple SHALER Vualcanizer for OD full details : At your \ -) ' 7 emergency use in making quick, per- lealers— mR manently vulcanized tube repairs or write i\f =; ye anywhere— at home or on the road in wind or storm. > It’s easy and inexpensive. The SHALER Dept.m iii works automatically—and without fail. Just = i touch a match to the chemical fuel. In five The John O. Heinze 1 i minutes the cut or puncture is repaired—a bit Ohio permanent, heat vulcanized repair that will not come off—stronger than the tube itself. No gasoline, cement or flame. Carry the SHALER in your car. So simple—anyone can use it.

to us

le

| I llustrates and explains how to grind Saves Repair Bills ‘ phe} tp Ne od as an expert with e Si Tool Set for Fords, keep engine Stop the wasteful habit of carrying$2to$15 5 et ‘hitting Se ee ee worth of spare tubes that deteriorate quickly, lete set with instruction book $7.25. 7 ; and of scrapping perfectly good inner tubes ALBERTSON & COMPANY that only have a cut or puncture, which 1523 wr se end Patentese you can permanently vulcanize, quicker hn A Sioux City. lowe than you can insert a new tube. The oy SHALER also repairs rubbers, rubber boots, A Double Money-Maker | hot water bottles, etc. very auto repair _s oom ald Ly thisseteamer, |< Sottens Compour it t x fo sy open . eo while mu aa ioe een whebe. oleae distiled Complete Outfit $1.50 The outfit includes—the Shaler Vulcanizer — 12 c filling batteries You can make money with an NBD Battery Steamer nb, Patch-&-Heat Units and complete instructions Extra WITH CONDENSER . Patch-&-Heat Units 75 cents a dozen. Prices slightly batteries without e of breakage. Simple, higher in Canada, and west of the Rockies. perats wffic ent and economical, — So 10018 ste gos | Buy From Any Accessory Dealer Cc. A. SHALER COMPANY attery Charging Your 2013 Fourth St. Waupun, Wis. Biggest Money-Maker- Start Your Battery Business NOW — Make $150 to $350 Every Month NOW is vo ur opportunity. Make 8150 to $350 Clear Profit very month with this HB Charger. Recharges 32 6-volt vatteries, or equivalent, at one time. Cost 10c to 15c each puee r pays The to €1.50. Figure ge

} “1 can make RIG PROFITS @ ar ‘ae mid @ we rmenent busines Others are doing it yor un. too Small Cash Payment Brings You This Money-Maker Ralance on easy monthly te ’ Profits fi otfit Absclute M mey neive repairs or st ur a's ” day sin, steady profitable income rit ropay for full in format ” :

Succeaaful Manu fac surere Please Mention Populai

Page 322

194 POPULAR MECHANICS ADVERTISING SECTION Wouldn’t you give $2.00 for a reserve tank { ee sini your Ford or Chevrolet? That’s what “Lot = onan vere — - Here’s yoilr chance to handle cost of only fIC. Why pay $15 to an accessory that moves fas g g . ° “—~ where every sale makes another $30 for a costly repair job, giving Don’t wait a minute, send a : postal right now Be first in no better results,—your car laid up your territory, It's the greatest Ford accessory for quick for days? sales and satisfaction that . ever came out That's straight goods. Write now.

Good results are guaranteed when ‘ vod an top of ou use National SalesCo. reserve gallon ot s ready to us y 605 Gas Bldg., Pion hike “Ser the fireat gda RADIATOR | ken sa07. Taw Weak

Easy outdoor work applying the Century P automobiles and furniture. Every auto owner prospect. Three to six autos can be treated | at from $5.00 to $10.00 per auto. We teach \ a liquid, almost magical in its ability to put youin business. Complete particulars free. Writ« stop the meanest leaks anywhere in cool- CENTURY PRODUCTS COMPANY ing system, simply by pouring contents of Dept. E. CINCINNATI, OHIO a 9-ounce can into the water in your radi- PREVENT REAR END COLLISIONS WITH A ator. It reaches the leaks and seals them. KOBZY SAFETY SIGNA L Remember, if Radiator Neverleak doesn’t Notifies car behind what you intcnd to do. Acents wanted Pima ee ae . CHICAGO DIE 2 & SPECIALTY co. do all we claim for it, if it doesn’t sat- 553 West Monroe Street, De CHICAGO, ILL isfy you perfectly, your money will be .

refunded or the goods --genuino is..cr ermor for auto tires. Double mileage: prevent punctures and blowouts. Agents wanted, replaced, free, at your American A ies Co. Dept. PD, _ Cincinnati, Ohio option, by your dealer, or by us, Radiator Neverleak can _ not harm your Radiator! Carry a can always for emergency. Get the genuine in the yellow, aN : : : P A . me . white and green can, =. ate S 2 Sei S ca- se —— —————— Price 75c at all dealers ——— ax — or sent direct. Basch state) BUFFALO SPECIALTY CO. of Money Saving Bargains in “The \WN WA? People” DIAMC ONDS a Basch still of ff ~4- i tht >; "in ite © fri g pod § offers in — A. ¢ isin ces — EllicottSt.,Buffalo,N.Y. posse asd at ing © coaraniee jartanh Eigarts fev 25 Tease. seathogee eines tends ctunanetepenentune sanenh, Be ao ee = Wee eS eee on ks fore roo buy th Write today. | L. Basch & Co., Dept. 13471; State and Quincy Streets ,Chicago, Mil. |

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POPULAR MECHANICS ‘Get the Coaster Wagon With | JStio Wheel onthe Sides Tom Don’t let them sell you any other kind. The Auto-Wheel is the genuine coaster wagon — and it’s the only coaster that will admit you to our Auto-W heel Club. With the Auto-Wheel you can join our club and take in all our good times You know it’s a big, speedy coaster 10 strong that it will carry a 1000 pound load with ease—so fast that it will beat iny other wagon made. PRIZE CONTESTS Our new MAGAZINE for boys tells of the prize contests we are holding peri odically. We'll send you a copy of the magazine if you will send us the names of three coaster dealers, mentioning which one handles the wagon with cAuto-Wheel on the sides. We'll also send you a booklet telling you all about our Auto-Wheel club, which you can organize. The Buffalo Sled Company 137 Schenck St., N. Tonawanda, N.Y. In Canada, Preston, Ont. ° Re-Upholster Your Car and Furniture a With the famous “Chase Leatherwove” twnexrcpensrve, a scientific, practically-as-good-as-leather fabric. @ rite for Samples. L.C. Chase & Co., Boston, Mass. e made to your measure, payable after re- ceived, with the clear understanding that if the fit is not perfect or if you are not satisfied in every way, if you are not con- vinced you have received a fine, high grade, stylish, perfect-fitting tailored suit made to your measures and have saved $15.00 to $20.00, you are not under the slightest obligation to keep it. Don't hestitate or feel tir » no t to you Any ey y may have p Samples Free. Any mat in saving money, es free samples and prices anyway. You will lear: thing important about dressing well and saving money ( Park Tailoring Company, Dept. 153, Chicago, i J ADVERTISING SECTION “T want only a Corbin Coaster Brake!” When you say that to your dealer, you fortify yourself against any possibility of poor coaster brake service and insure a season of bicycle riding free from brake trouble of any kind. CORBIN DUPLEX COASTER BRAKE Corbin Coaster Brakes—Duplex and Two-Speed—are made husky, reliable, conscientiously, of the highest quality’ materials, to meet every demand of safety, emergency,smoothness, comfort, and ease. With your wheel equipped with a Corbin Brake, you ride one-third and coast two-thirds of the distance. Guaranteed by a ten million- dollar corporation. Illustrated folder gladly sent on request. Corbin Screw Corporation American Hardware Corporation, Successor 200 High Street, New Britain, Conn. Branches: New York, Chicago, Philadelphia

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POPULAR MECHANICS ADVERTISING SECTION i Best of All They Are Dependable Kokomo bicycle tires are slow leak proof because they have a triple reinforced valve construc- tion. They are puncture resist- ing because they are made of tough, live rubber. They are resilient and offer greater riding comfort, because they are de- signed to hold more air. But best of all they are dependable. This is a virtue built into tires only by makers of long experience. Kokomo Rubber Compan KOKOMO, INDIANA > “Contributors to the 1920 National Adver- tising Campaign to Promote Bicycling.”’ EVERLASTER Twin Grip Send for FREE Catalog There are 128 illustrated Rings, Diamond La Vallieres. Screws, Diamond Scarf Pins, 7 Watches, Wrist Watches; also our wonderfully showy assembled Solitaire Diamond Clusters, } EVERY ARTICLE IN OUR CATALOG is spec- ially selected and priced unusually tow. ever you select will be sent prepaid by us. “J see and examine the article right in your \ own hands. If satisfied pay one-fifth of purchase price and keep it, balance divided into eight equ-! amounts, payable monthly. wll, LIBERTY nox Diamond Rings We are offering wonder! values in Diamond Rings taires and Clusters, in ai popular mountings, plain a fancy encraved, eneci $40, $50, $75, $85, $100, $150, a a promis te . one-firt own, balance in « ae age Re) equal amounts, payable mont ay: Our Catalog brilliancy, NY Watches lustrates ar . per ; describes ail the standard wor ey ee renowned Watches—solid We guarantee and gold filled cases, Spl entire eatis- bargains in 25-year guarar faction. Watches; credit terms as low $2.50 a Month LOFTIS BROS. & CO., National Credit Jewelers Dept. A-894, 100to 108 North State St., Chicago, lilinois (Established 1858) STORES IN LEADING CITIES ght é OH! JUST WHAT I WANTED Real Model Racing Yachts Sails Faster Than You Can Walk Sport for Men and Boys. Construct complete—30 in. long, with Rigz« ! and heavy Lead Kee! t reacy to sail M Sailing’’ just printed giving fal! instruct Sport: How to sail, me, nautical terms, « NEW YORK MODEL BOAT & MFG. COFP Suite 226, 18 Broadway NEW YORK CiTy Mr. Zdison's Wonder! ul New Amberoia — Edison's great phonograph with the diamond stylue—and your choice of records, for only $1.00. Pay balance at rate of only a few cents a day. Free trial in your own home before you decide to buy. Nothing edison | Sa OQ Down Only # = Bem the tots down Write for our New Edison and pictures, free. F.K BABSON, Edison Phonograph Dist., A135 Edison Bik. Chicage, Il

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POPULAR MECHANICS ‘ADVERTISING ‘SECTION

ey aan. =i ae

\, Your Own Better HS Save Money Want a beautiful home with modern comforts and conveni- ences—built with finest material throughout? You will be amazed to learn the modest outlay required for the remarkable \ Save $300 to $800 Finest lumber is cut in tremendous quantities . BetterBuiltl —according to tried and trusted plans by famous Book of 60 Fine Designs Free architects. No sawing on the job--nowaste—no_—_—>7,y the whole splendid story. See photographs, extras. Your house is complete inside of weeks, — descriptions, facts and figures proving remark instead of months. Money saved in countless ways. able savings. Fill in and send the coupon today We Guarantee Entire Satisfaction or Money Back RAY H. BENNETT LUMBER CO., Inc. Makers of BENNETT HOMES 940 Main Street, North Tonawanda, New York BENNETT HOMES, 940 Main Street, North Tonawanda, New York Gentlemen:—Please send free 72-page Catalog No. 94 of Bennett Homes, Better-Built and Ready Cut to Name

Street

Town iacseien Phenearanhe $4.00 to $200.00 Retail Our Sundry Dept. offers Needles 39c per thousand Motors $1.35 to $14.75 each. Tone-Arms and Rep roducers $1.30 to $5.75 pe rset. Main Springs 200 to 90c each Recore Needles, Sapphire Pr yinta and Parts at reasonable prices. te for our 84 page catalogue, the only one of its kind tr ae srica, illustrating < 3 different styles of Talking Machines and over 500 different Phonographic Parts LUCKY 13 PHONOGRAPH COMPANY Export Dent. 46H, E. 12th Street, N. Y., U.S.A SMALL with Likes | Perfected Gasoline Rnginee is for Farm and Shop use. Price WASHING MACHINES We ship on trial. Send for Booklet and Special Offer. SIEVERKROPP ENGINE CO. 1224 18th St. RACINE, Wis. STARTER for FORD CARS That Luden’s are *

just

the thine” f dust Have You a Saw and Hammer? Oe ee Then Make Horses and Money! Send 50 cts. for 9 this simple cut out. What you can’t sell your self we guar. || MENTHOL COUGH DROPS antee to buy. | GIVE QUICK RELIEF Kelbo Toy Compan | ART RS RATES DI NTI perernett o - f . - . ss © 2 © | Richmond Hill, Long Island tickled nose and throat.

Please Mention Popular Mechanics

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POPULAR MECHANICS ADVERTISING SECTION Old Sown Canoes You can lazy-paddle an “Old Town” all day long. ‘Old Towns” are light, buoyant canoes that answer the slight- est pressure of the blade. They are strong, sturdy canoes built for years of service. The “Sponson Model” is safer than a row boat. Write for catalog. 3000 canoes in stock. OLD TOWN CANOE CO. 1966 Middle St. Old Town, Maine, U. S. A. .1|“l MADE $34.00 LAST WEDNESDAY” Writes Mrs. Betty Smith from Florida. | it’s not unusual, for our agents are knocking out b 1 none, every day. Write today for special offer. ow > ut | lias 4)’ ape ee eee |S ae 2a se 2 oes “Lucky 11” Combination in Display Case 100% to 200% Profit Tis is ™y to FORE his is m outfit. Ox stg you only 65c—retails at $3 seamne oct for $1.25 to $1.75. Anyone can sell at that undereut px And it is one great outfit, too. The box is 6x18% inch: containing 11 regular drug store articles that e very! wants. Write today for details It’s a Gold Mine! Sells like hot es—men women cx ining 50, to 100 dollars a day—a baby could « *Lucky 11." Don’t delay a minute You re losing ban notes and hard silver while you wait Write Today Sutese it's ter hate Aah vert E. M. Davis Products Co. "2325 ee because it is built on sound gama prin- ciples all through. Play Safe in Buying a Row-Boat Motor you can’t afford to take any chances. No matter what style of motor you require, there is a Misscoan sin PtP 2Ss3'* Motor that will suit you. For six years this = Bw standard little motor has been making % GOOD under all conditions—in the hands of 5 thousands of users. And no wonder, when you examine its mechanical construction. It has a number of exclusive features that you should know sbout. Write for catalog TO-DAY. WISCONSIN MACHINERY & MFG. Go. 19 Minor Street, Milwaukee, Wis. Enjoy the thrill and excitement which bait-casi\ng angling gives, by casting for ‘em with the South Bend Reel which entirely eliminates back-lashes, snarls and tangles. Our book "The Days of Real Sport’’ tells tried and proven casting methods. Shows complete South Bend Tackle line. A postal brings it FREE. SOUTH BEND BAIT CO. 3590 High St. South Bend, Ind. 7] [MARINE ENGINES 3H. P. single and 6 H. P. double cylinder, all iron or copy jacket, aluminum base, light weight, for canoes and sma!!» THE WATKINS MOTOR CO., 828 W. 6th St., CINCINNATI, OHIO | Yo H. P ry) * oat tare (\ The “Hafa-Hors” Engine Gas or Gasoline »For running Cream xg ator Grain Graders, Churns, Was 3 Machines and other s! ¥ tools. Foot Pedal Starter mak: » it as convenient as an ele = Motor. All moving parts safely enclosed. An ideal woman’s engine. Safe, Relia and Eccnomical. Sold under an absolute guarant: See local dealer or write us for Catalog ELGIN GAS MOTOR COMPANY, 65 River St., ELGIN, IL! BUYING *92¢@z79 DON’T BUY WITHOUT THIS BOOK ~ It’s filled with solid facts about the values of high grade Diamonds, Watches and Jewelry that will doub le the purchasing power of your purse. Write for the Royal Catalog A wholesale jewelry house in a nutshell; goods at ~ prices minus middlemen’s profits. Get a copy NOW; it is FREE; learn how to open a charge account and pay monthly or weekly, if you like. Liberty Bonds accepted. Ask for Edition 139. ROYAL Diawmonp X WatcH © 35 Maiden Lane ~ New York

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POPULAR MECHANICS ADVERTISING SECTION This Rowboat Is Always Light The Mullins steel boat cannot water- log—it’s always easy to row. Air compartments fore and aft make it unsink- able. Steel hull, can’t leak, dry out or open at the seams. Never needs calking—no boat house required. MULLINS Cant sinx Designed by America’s foremost naval architects. Built in the world’s largest boat factory. More than 70,000 in use. Write for catalog listing over 40 models of steel and wooden rowboats, canoes and power boats. THE MULLINS BODY CORPORATION BOAT DEPT. 613 Franklin St. SALEM, OHIO ie + . Art /MOTOR BOATING! Great Sport Small Steam Engines and Boilers | and nO Oe ae GAS AND GASOLINE ENGINES, osition on this eplen- . a 2 % i. P. up; Tanks, Pumps, hp electric yo : ¥ ' Gears, Model Makers’ Supplies Complete in Every Detail Soe wr Mie ¢ at olegne sont post pald for Vie | Arco make, he “coat ot tcoin preterred) or stamps. © Refunded frst Lents Seaman . MODERN ENGINE & SUPPLY co. Fostoria, Ohio, U. S. A. - 342 Monadnock Biock, CHICAGO More Power-Greater Speed! The KOBAN will run away ~—It gives valuable information . from any other rowboat motor about motor boat engines. It also because iis two cylinders describes the full line of L-A mo- ‘ ; produce more power. It is the tors and tells of the 30 days’ free } Me motor for the man who demands trial plan. Write for your copy today. i " ’ iA eal service and «fficiency. The LOCKWOOD-ASH MOTOR CO. , er eee ay SOBAN absolutely does not 2012 Jackson rt. Jackson, Mich, +22) i's shake the boat, because both ‘ cylinders fire at the same time, neutralizing the shock The Great 2-cylinder RA Racnews WY) BOB ioe } | America’s Finest Canoe Only by this 2-cylinder opposed con- Write for struction can you avoid the vibration catalog and that makes riding disagreeable, opens Sull infor- seams and ruins rowboats. Special mation. soe device for shallow water and S49 ° eaching. For commercial work the Because it's built that way Dealers and 4 KOBAN is unequalled. Used by U. S. Write for Complete Catalog local agents § Government and in 36 foreign countries. RACINE BOAT COMPANY esantes. lasts cnibeames. divreder Gaus ak atom ah Dept. 61 Racine Wisconsin KOBAN MANU FACTURING co. 291 South Weter St., Milwaukee, Wis., U. S. A.

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POPULAR MECHANICS ADVERTISING SECTION South Bend Lathes For the Machine and Repair Shops 13"Lathe. , . $385.00 | 18"Lathe . . . $ 735.00 oe * . 483.00 | 21" “ 900.00 _. 7) ee 550.00 | 24" “ - « « 1250.00 Made with straight or gap bed. Price includes equipment as shown in illustration. South Bend Lathes have been on the market fourteen years. Over 23,000 in use. Est. 1906 ove to Run a Lathe An 80-page book, Free catalog mailed on request. postpaid to any address f for ten cents, silver or stamps accepted- J SOUTH BEND LATHE WORKS, 423 E. Madison St., SOUTH BEND, IND. I Can Ship Your Engine or Saw Kig amozoz Save you $15 to $500—Cash or Terms—Immediate Shipment—2, 3, 4,6, 8, 12,16, 22 or 30 H-P— Stationary, Portable or Saw-Rig—Gasoline or COLD PIPE BENDERS Kerosene, My prices are lowest for High Tension Standard of the world Ignition Engines—the best ignition for kerosene. Bends all sizes of Pipe from %" to 8", th motor operated. WITTE ENGINES nd or ena American Pipe Bending Machine Co. With Bosch Magneto 59 Pearl Street BOSTON, MASS., U.S. A This is the greatest combination of engine and ignition system I have ever been able to offer. Write for latest prices on these outfits---also Drag Log Saws---the most practical for average work--easy to operate--ready to use. | ii. P., 110 volts, oo ENGINE ema fl A 6:6 onl, 0 iG . Kansas Ci ' —, ay, bY — 1750 R. P.M. nes a mi LARGE pepe lp WASHING MACHINE MOTORS These are of Centers wen ase re and carry the full factory guarante Sh eee in original boxe ut. Se Soca elon agSe ities ers, Cream Sep h.-- ‘ “D attle Washe essors. Saal Lathes. Pte We will sead C.0.D. sub- won ject to full exami idatiod Cannan tore f ac 5 | _ Money Beck Gearenten. | Cotalogus Special Quantity Pricee-Value $32.90 MANUFACTURER'S DISTRIBUTER GHAS. H. JOHNSTON §Box 15 W. E,, Pittsbargh, Pa. This handsome portable tool case isthe newest product in the we ‘l-known “Pilliod’’ line. It hasall the superior features that mak: these c:ses famous Strong and # slid. vet light in weight. Has 3-compartmenttray; saw and level rack; brass-plated riveted harc war atrong lock Trunk slat reinforcements; beauti iful enamel water-proof finish Fully guaranteed. If your lealer nt supply you, write direct to us PILLICD Tool Cases Excel A place for each tool and ‘ach tool in its place saves time. A size and style to fit your requirements. DEALERS: If you're not hand- ling Pilliod cases, you're overlook- . ing the “best bet."" Write today _ —. 4 , for discounts. Carpenters’ Case Catalog of Complete Line Free. | THE PILLIOD LUMBER CO., Dept. “B”, SWANTON, OHIO Machinists’ Case

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POPULAR MECHANICS ADVERTISING SECTION SEBASTIAN 10-13-15 Inch Swing— Gap or Straight Bed. Medium Priced Good Lathes for 30 Years. Write for Catalog. THE SEBASTIAN LATHE CO. 107 Culvert Street CINCINNATI, OHIO, U. S. A. Bwing 4 in., I] in, between centers, 17 in. total length. Shipping weight 13 Ibs. Be a of lathe is machined, orkmanship first- class. Equipped with wood turnin chuck, Can be fitted with 3 in. face plate and drill chuck as special equipment, Order one today. Price $6.00 cash cricr, SYPHER MFG, CO., DEPT, D TOLEDO, UHIG MECHANICALLY RIGHT 9 to 18-inch Swing List price $100 and up according tosize. When ready to buysend for Lathe Catalog and prices. W.F. & John Barnes Co. 100 Ruby Street, ROCKFORD, ILL. . RESCENT MACHINES ng entire satisfaction in as ferent places that we do not e to urge you to investigate rites and place your order xpect to need any wood working oture. Send today for catalog aws, jointers, saw tables, planers, and mate hers, disk grinder, swin t be hap rs, variety we low ‘hiwel morti er, universal kers, table cut off saw. Crescent Machine Co. umbia St. Leetonia, Ohio The World’s Best Hand Cleaner. Scientifically com- pounded. Made to Clean and Protect Your Hands. ELECTRIC MOTORS NEW AND REBUILT General Electric, Wagner, Century, Westinghouse, Emerson. Motors bought, exchanged. repaired. Whole- sale prices on electrical supplies, in- cluding sockets, wire, tape, porce- lain goods, switches, loom, bells, bell transformers, conduit, lamp cord, etc. Illustrated catalog of motors and supplies FREE. HYRE ELECTRIC CO., 637 S. Dearborn St., CHICAGO You Need Bernard Pliers Bernard Pliers will do the finest kind of a cutting job. They bite cleanly through metal that you'll only scar with old fashioned cutting pliers. They are the Standard High Powered Cut- ting Pliers. Their power comes from the Bernard patented principle of compound leverage that makes their parallel jaws hold like a vise. Bernards won't slip, won't let go until you release your own grip. BERNARD PLIERS are made from tip-top quality stee!, by tip-top artisans. Bernards are beautifully finished and nickeled to keep out rust. The handles are closed on the inside so that no edges can chafe your hand. You need Bernards for your home, office, shop, garage. Don't overlook the Bernard open throat and hollow centre You can shove along wire or rod rig ht through the parallel jaws and take a firm eri p ny where you want to, It > aveet for bending o1 stretching wire. Write today for our vest pocket Field Catalog. Bernard Pliers are sold by all first class hardware { and tool housas Lool rife name Bernard on every pair. Sizes 4", 5", 54", 6", 64", 7" and 8* WM. SCHOLLHORN CO. Sew saven.conn. Please Mention Popular Mechanics

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POPULAR MECHANICS ADVERTISING SECTION- ANeriyinenied SAW RIG Will saw your winter’s wood in a few hours and OttawaSawRig. youc \ wes ail pract | LOW Introduct then youcen make moneysawing for others. Many . i se roe | LOW in uc 0 eT users say ihey make upwards of $11.00 a day other saw rig cutting wood for neighbors. Expensive cumbersome can. For a small part of the cost of one of t! : rigs used in the past are made unnecessary by the priced and obsolete rigs you can now own the OTTAWA SAW RIG strictly a one-man outfit. Easy to operate, light to move, simple to handle P cycle motor that drives any belt machinery when not sawing. It will pay for its ~~ two weeks, just cutting wood for neighbors. 30 Days’ Trial; 10 Year Guarantee. ann 2 the ( Mttawa work a month for you to prove ourclaims, Write for FREE BOOK TODAY ~ OTTAWA _MANUFACTURING COMPANY, 371 Main St., » Ottawa, Kansas OCKWOOD FE; riction Transmission

High Efficiency at Low Cost || | Send For Catalog “NP-4” Pesering Our Full bv MRE Ce . note W.A. JONES FOUNDRY &MACHINE COMPANY OSES En. Seen ease Se 4419 W. Roosevelt Road, CHICAGO, ILL. _ needs of a wide range of constant and variable speed machines for a means of power trans om mission that is highly efficient and dependable, A Blast w ithout a Blowe: er yet low in cost Y. F ne herry red for harder

£ For hundreds of users it is daily demon ' ly F _ Pays for itself in da strating its ability to save power, increase ma / wi On request we will gladly send you our 92 page free 4S : Mery »* either whole numbers, decimals book riction Transmission valuable and > S/he WN mixed numbe It solves prot instructive te = a8) p r Sine Tange 1E2eu Aq) Ay 5} ny exclusi atures and is the t ae The Rockwood Mfg. Co. LAS a ) 2s nets. ace see 1946 English Ave. Indianapolis, U.S. A. S KAT Cleans better because it’s a D i S STON SAWS PASTE SOAP “THE SAWS MOST CARPENTERS USE’ : TON & SONS, INC. SKAT, HARTFORD, CONN. punaneunn Pa. — Canadien Works: Toronto, Can

tantly ad subtract, multir

a “— ToolCases sisi is order| There's a pla

. P " oe jraw ind similar Locks made in one + ie aan rae rrisonM LP es ling Ma i we Cases the beaut fyanilt ne teat Thousanea it we $5.00 3 ‘ prac ket r ey c amond-shaped f ion vrangular en pleas ere fon d all mor wit e cevs, 60c¢ each, HarrisonC. K. Key Clamp re . i cates all common and lever keys withont . a paler 1S&r fs scaliper. Price, $2.00. Parcel post prepaid - nee . A Monen returned if not autisfactory ‘ . Mirs. of — cs’ High Grade Too! Cases HARRISON & CO., 81 New St., New York 808 Columbia St., DAYTON, ono

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POPULAR MECHANICS ADVERTISING SECTION OSTER BULL DOG DIE-STOCK SK your Supply House about Oster Bull Dog Die-Stock No. 102 for pipe — zes 4, ¥%, %, 34, 1 and 1% inches. Illustrated Catalog on Request The Oster Manufacturing Co. 2100 East 61st St., Cleveland, Ohio, U. S. A. The ONLY intertock- == Interlo SS. MASTER SLIDE RULE Here ts the Exact INSIDE Measu not at dealer's, ~ Best, Quickest, most accurate end his name and rule for outside meas per foot( any length, 2to " urements, too ), and we'll send rule prepaid. M ASTE R RULE MFG. CO., INC. Fo reteannin yp -reneery snenee ) 841-43 E. 136th St., New York City electrical, rope, airplane, piano, pipe-organ, flat, hoops, bak ties, tacks. nails, barbed-wire, concrete re -inforcement, springs, netting, wire fences, steel posts, trolley-road wires and ul bonds, wire wheels, auto- towing cables, horse - shoes. Illustrated Books Describing Uses, FREE sail Steel & Wire Co. "etgicekéS** MYERS WONDERFUL SEWING AWL Tools in Handle The Awl For All A complete repair shop in itself. Sews anything heavy or light. leather es, harness, buggy tops, canvas, belts, etc. $1.00 Postpaid. C. A. MYERS COMPANY, 6339 Woodlawn Ave., Chicago, II, THE WORLD FAMOUS Alvan Clark Telescope We are now able to supply these wonderful instruments for terrestrial and astronomical observations. Cut shows new type 3" port- able terrestrial. Light weight—compact— easily carried anywhere-- highest quality throughout. Circudar and prices on request. THE ALVAN CLARK, a. SONS. oer. Makers of the ta 55 Henry st. wr Gettin. Mase PN PUR ALTO MECHANICS KIT SMITH 4 HPMENWaY CO Gone we Derry re oer) Red Dewil/ ato U.S. PAT OFF Pin Punch Set A useful little set for motorist or machinist 6 Pin Punches with Octagon Handle 5 Inches Long and Ground Points 4 Inches Long. Size of Points: 4/3). (320i 3/18 “Red Devil” quality in this instance means Octagon Stock Swedish Analysis Point 80 Carbon Steel. Absolutely the best possible steel for the purpose. From dealers or if not, direct from us for $3.00. Mention Style No. 483. BOOKLET ON REQUEST SMITH & HEMENWAY C0., Inc. 260 Broadway, New York Please Mention Popular Mechanics

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POPULAR MECHANICS ADVERTISING SECTION tanley ‘Tools Stanley “Pistol Grip” Adjustable Saw Set No. 42 This Saw Set embodies several unique and important features not heretofore seen in tools of this description. The shape of the Body and Handle enables the user to operate the tool with great ease and with the least possible exertion, and the Saw is held firmly against the gauge while the tooth is being set. It can be readily adjusted by means of the -nurled thumb screw to give a greater or less set to the teeth of the saw, accord- ing as the saw is to be used for coarse or fine work. As the anvil or part against which the plunger works is graduated, the same adjustment can be easily obtained for duplicate work. The *»ol is so designed that the saw teeth are in plain view which enables the user to quickly adjust the tool to the tooth to be set. The plunger and anvil are made of tool steel—-hardened and tempered. All parts are carefully machined and are interchangeable. The tool is given a fine black finish. At Your Hardware Dealers Manufactured by STANLEY Rute & Levet Co. New Britain, Conn. Mend Your Kitchenware, | Toys, Wires and Do All Metal Repairing IN THAT TURNS INTO METAL WHEN HEATED A match will doit, Requires no acid or soldering iron, Joins or repairs wires metals, or metalware, Sold by hardware and electrical stores, or seatby us postpaid. SOLDERALL CO., Dept. P, 129 Sussex Ave., Newark, N. J, COMBINATION SET Tube and Torch complete $1 5 A Necessity for Every Shop “The Samson No. 3 Bench Punch,” with a power- ful leverage of 24 to 1, is intended for work beyond “ the capacity of the “Samson Hand Punches,” 4 and will punch holes from 4% to 4% in. in soft metal up to 12 Gauge. Extra sets punc hes and dies size ! %, ys, and %% in. easily in- serted and. ‘removed, (maximum punching ‘apacity y" through 12 gauge soft metal.) Sueeed with 3-16-inch Punch and Die unless Otherwise Specified $4250 Catalog of Complete Line F. 0.8. Sent on Request. Factory The Machine Appliance Corporation 351 Jay Street, BROOKLYN, N. Y. MUSED BY U.S.AND ALLIED GOVERNMENTS Price Saws 25 Cords a Day The Ottawa Log Saw falls trees or cuts off stumps level with ground. Saws up logs, cuts up branches, ice cutter runs pump jack and other belt machinery, Mounted or wheels... Kasy to move anywhe re. Ten-Year Guarantee Days’ Trial. Write for Free Book and Cash or Basy ‘T' OTTAWA MFG. CO., 1741 Wood Street, OTTAWA, KANSAS UNION TOOL CHESTS Made strong to last Roomy, convenient. 24 alifetime. Solid ak & yles ak einen Write or imitation leather for catalog and name —lock-cornered joints of nearest dealer UNION TOOL CHEST CO., Inc. 22."!.5°3%_) Rochester, +. | For Gillette Blades Use | The Big Four Stropper A few turns and one operation +! ens both sides of the two edges of blade giving a perfect smooth cut finish and a luxuriousshave. Make old blade new and a new blads You can have more than a hundred comfortable shaves from one ib ‘ade alone. Every blade should be stroppe gac ach shave— watch oe barber yt at's wh ao ows. % Simm anc ac and he km c ae mn aed 1 sgs0 guaranteed to give qptetaction or mone lunded. postpaid fnsured, anywhere in the Unite "a State oa for BREZAL, Inc., Mohawk Bidg., 21st St. and Sth Ave..New York City

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POPULAR MECHANICS ADVERTISING SECTION

NURATEX GUARANTEED SHIRTS Insured for 6 Months’ Wear “Buy shirts that last, look well and fit. Postpaid to your door’”’ Send $7.77 and receive three fine percale Introductory Offer: shirts. Assorted neat striped soft or stiff Postpaid or C.O. D. State size, Neat Saratoga silk tie extra. Other sete at $6.85, $8.95, $10.35 and $12.85. Shirts of the better kind. A shirt to fit every man. Catalog free. ( 00DE LL & CO., 508 Duratex Building, NEW YORK est mail der wholesale haberdashery im the world, - a = . ~ me - — Genuine Toyo oi FREE PANAMA, SR ccs ee Arrival te ne: » for : lazing 1. Only

—3=.| Diamond Bargains Money! Just Released iil postcard or letter for this handsome Toyo , _ a Hat. Beautifu! drop crown style; flexible brim; unbreakable. Unusual conditions force us to offer many great uper-grade, fine, tough fiber, tightly woven. Heavy, black bargains in diamonds. Through owners failure to pay

silk ribbon band’ Non-soilable sweat band. Don’t send a > . . . ag ot : > Bae Pay only $3.29 on arrival. We pay transportation. money loaned, we are offe a s to the public so itch then WE GUARANTEE 2 "I 2 se 2 at Post Cards and Buttons. Ready to be De Send coupon today. Don’t wait with ~ hong bligation to livered “ON THE SPOT,” Big Money Maker . 7 ‘ _— or eee 5 ; me, your catalog and latest ices, bathing beaches, fairs, carnivals 4 Diamond Loan Bulletin. (

_ hang ye Send your name onl, for the latest fins. Smell investment! Lerge bargain bulletin Lists newest rofits! Write for illus circular. FRE bargains in diamonds. Freeh Internat‘onal Metal & Ferro Co., Dept. 16, Chicago from the press. Great values just released. But only a few. Write in now before agit All Scrap Lead you are too late. Hurry. Use all scrap lead, shavings and trimmings, ’ 4 Address... by melting down into usable form in thie L. Goldman s Sons LEAD MOLD ||| “Dee iiss 7 Every metal shop needs them. Pays . for itself in salvage in a few weeks Kansas City, Mo. $1.50 Each. $2.50 Pair. Write for circular C —of other battery shop money savers.

American Bureau of Engineering 3501-16018. Michigan Ave. ,Chicago

Please Mention Popular Mechanics

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POPULAR MECHANICS ADVERi(SING SECTION

Build a Business for Yourself Sharpen Razor Blades Buys Guaranteed, Ready-Cut Material to Build This Home a Qur PRIC includes best quality of for you to step out of new lumber, lath, sheath- . * the “Wage Working” ing, shingles, beautiful clear siding, class and into a doors, windows, trim, flooring and hand- Money Making” some hardware; building paper nails, business of vour owr guttering, spouting, paints and varnishes . ou need no experi- . : : = “ ool ence—very little money required. Bevin rivht < for three-coat work, all under vr small room anywhere. You will make money rigt Our Guaranteed Ready-Cut System | from the start Nearly everyone now uses Safety Ra T ‘ aa t dealing t het be and there is a big opportunity for you in this business wenty-seven years nonest dealin yacked b our $10,000,000 capital are your absolute surety. There’s a Harris Home in your vicinity—let us e ew ula rup ex e vet ger tell you where it can be seen. Paste the coupon is a mechanically perfect machine, it leaves nothing uess work It is ties! re-sh arpening devic ‘ below on a postal card and mail it today for com- pleteinformation and our Plan Book of one hun- dred other Harris Homes— sent to you FREE! the ee that nanos ond ae the blades, ste step until the finest edge that steel will take is obt HARRIS BROTHERS Co., Chicago, Ilinois No cama, springs or flopping of the blades, but has an ev wsae2eeee oe pressure on both sides of the blade at the same time; PASTE THIS COUPON ON A POSTAL suring a straight, true, keen edge that gives the shaver HARRIS BROTHERS CO., the delights and none of the bitter memories of imperfect 35th and Iron Sts., Chicago, Dept. KS -7 sharpened blades. No other machine has the accurat ofPians Material Book twelve blades. Many have tousht these machines and ° ans making from $20 to $40 daily You bave the same o Name J tunity, if you hurry,don’t let the other fellow beat s Send now for FREE booklet. ae eae <a F.W. Cochrane Mfg.Co.,5831 So. Vermont Ave.,Los Angeles, Calif. Big Profits Every } Month in. | Sac Battery Charging With a A y : : You Can Make $100 to $200 Clear Extra Profit Each Month wit now rp

This HB 500-watt outfit recharges 1 to 8 6-volt batteries at once for 10c to 15c each. Owner pars 75c to $1.50. Fig- ure those profits! You can build a big, profitable business in battery charging No mechanical knowledge required. Small lave ei ment— long, easy terms— BIG PROFI Smal! Cash Payment Puts wate HB Outfit in Your Garage Balance on easy monthly terms. Elgin, Waltham, Howard, Illinois or any watch you want. Easy Payments and 30 days Free Trial. Send for Big 112 pages wonderful values, diamonds, watches, rings, jewelry, up-to-date de- signs. Buythe ereWay,you will never ne DEA the money. Get posted, write today Profits easily carry payments. No Prat ; | ALFRED WARE CO., Devt. | 166 §$t.Louis. Mo. expensive renewals—eteady, de rm pendable service wri h BIG “PROFITS. / — - Absolute mone ¥, back 5 uyrantee ear out @« You make a High-Grade Serev this ad and mail TODAY for information. " i Umakel Lathe and Milling Lath e from Umake M . 15, which includes al! Castings and 12 HOBART BROTHERS c0., Box M62, Troy, Ohio 4 - : blueprints. Complete outfit, $25. Note fo! Successful Manufacturers Since 1893 : dimensions: Length over all, 2 ft. 11 in.; breadth, 12 in.; ‘approxi ate ¥ 105 ibs.; dimensions of workirg surface of milling table, 4 in. x 6in has been designed to meet the wants of Model Makers who re quire a te " of very varied and ac eprate work. It is self-acting and Screw-Cutting. Wit all plain Milling work ¢ »e cone, as well as making it easy to do a great many ‘Burning ons boring jobs otherwise very difficult. Address W. R. PRICE, Inc., Dep!.7, UmakeM Bidg., 127 Sth Ave., New York

»lds storage battery plates in per tect alignment when repairing bat tery. N » metal touches bottom of plate New plates quickly and ac curately “‘leaded in‘’ with no chance to run lead over. Small size $7.80, takes thin plates ; large $12.80, s full plates AMERICAN BUREAU OF ENGINEERING 601-1601 S. Michigan Ave., CHICAGO Opens new, rich, tremendous j field Just what every «@ owner needs and buys on e@icht WIZARD WINDSHIELD WIPE A new and wonderful application of Leak al and mechanical forces keep windshields clear in stormy weather. Works automatically. One operation from seat—presto! glass is clear and stays clear entire storm. Sheds moisture like a duck sheds water Wonderful but true, ines across does work in any storm. Nothing to do but drive, hands free, vision ethear, safe trefree, happy. Powerful vet harmless ¢ hemicals, deposited on glass from felt-fille d steel channel. Non-smearing —dries like water. Rain, snow, sleet or fog vanishes like magic ‘its any car— turn nut—that’s all. Ornamental steel enameled mountings. Guaranteed for life of car. Thousands giving satisfaction Price low—only $1.50. te the perfect cleaner that every car owner has been looking for. Prevents accidents, saves time, money, Worry hing ever oe d—fastest seller. Easily shown—easily sold. Really sells itself. You take orders—that ‘s all AGENTS, DEALERS, ‘DISTRIBUTORS. here's your chance to make big money, . ‘ Big selling season now on. Exclusive territory Investigate. WRITE OR WIRE IMMEDIATELY FOR FREE AND WONDERIUL DETAUS' SECO MFG. CO., Dept. 19, TOLEDO, OHIO

of NEW and USED CAMERAS ana lies if you want to save = ney. ymplete satisfaction g Cameras exchanged or bought for cash. WILLOUGHBY’S, Dept. B 110 West 32nd St. NEW YORK CITY

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The Dorrance Utility Arm POPULAR MECHANICS ADVERTISING SECTION You can be absolutely independent and self-reli- it if equipped with the Dorrance Utility Arm. Made for use as well as appearance, its simple mnstruction insures constant service. It ‘is ractive in appearance, comfortable to wear, rht in weight, yet strong and durable. It operates easily, and may be skillfully used vithout the slightest feeling of awkwardness discomfort. Illustrated Book — Free ty Arm is sold and re t tif lit s Ask your yo write tor a tree yws in pra D. W. DORRANCE pre eee se a Dept. 102, SAN JOSE, CAL. FIBRE xtss if WEIGAT — MORI COMFORT, STRENGTH, WEAR Braces for all Deformities. SEND FOR BOOKLET MINNEAPOLIS ARTIFICIAL LIMB CO. 636 Dean Bldg. Minneapolis, Minn. BRANCH OFFICES hicago, Ill, 3515 W. Chicago Av. Indianapolis, Ind.,10 W.Ohio St. Washington, D.C., 302 13thSi.N.W. Detroit, Mich., 613 E. Jefferson Johnstown, Pa., 613 Napoleon St. Elmira, N. Y., 113 W. Water St. Kar nsas City, Mo., 10 West 9th St. New Orleans,La.,1314 Canal St Jerse y City, N. J., 863 Summit Av. Winnipeg, Can., 449 Main St Fag Protect Your Abdon.en A real successful abdominal Protector (pater ted) Does not roll down from top or up from bottom. Same price as any good Supporter. namedihe al Chart . Pictures and Partic ulars Free GOODFORM MFG. CO., 923 Mills Bldg., ST. LOUIS, MO. Your legs will appear straight when you wear Combination hose-supporterand pantlegstraightener Quickly adjusted to fit various degrees of bow- legs; as easy to put on and comfortable to wear as any ordinar y garter— no harness or padded forms; just an ingenious special garter for bowlegged men improves appearance wonderfully. Wearers are enthusiastic. You will be too, Write for free booklet, mailed in plain envelope. S-L GARTER COMPANY 773 Trust Co. Bldg, DAYTON, OHIO } Nene ITIS Final Solution of the Vibrator Problem Absolutely Astonishing ae and Greatest Invention You know that electrical vibration means new life- new power new health new beauty. You know it is Nature's way to banish pain — to improve circulation of the blood to send the blood surging through the body, giving you adced enerry and vitality you know dll thie-iut did you know that heretofore one of the biggest problems of science has been to invent a practical hand vi- brator that would be in every way absolutely satisfactory? Now that problem has vanished — we solved it acience has at last made one of the greatest discoveries in years — invented a won: erful de vice GUARANTEED to effect ALL the astonishingly beneficial results made possible by this approved method of treatment. All Other Methods Discarded! Owners of other devices will now throw them awny. It requires no connection with electric wires supplies its own power. Safe, light,compact.and cannot get out of order. This remarkable, new, scientific invention “I TAPULSER the Wireless Vibrator— is absolutely different in every way from all other devices, It contains all tl points of other vibrat« rs, but ite ren rkable exclusive feature is the wonderful patented improven pone that make it the greatest schhinvesnant of ite ki Everyone Can Afford This Marvelous Instrument Everybody you have always w 7 vibrator of some kind, but heretofore th prived you of one on vibrator we placed the lo »west possible pr ' on this wonderful Vitapulser the Makes no difference what other . they positively cannot be anything like th 8 great in vention we offer at a rock-bottom price HEALTH, POWER gone tbo week. mont 1. Awak« own power. Can be use Sent AF Approval problem of offer ar : ‘ 8 © fr — . ah wa ll Be about great appre ‘ ' J money—just the coupor ~werythi ing free. = Beauty % Yours Tiamat = —= oh Seat: Oe —= & l *, ommonwealt tric Mig. Co., are Mfg. 7067 Rialto Blde., St. Louis, Me. ny, Send facta about y r pe nl A Offer of 7067 Rialto Bide., et Vitapulser | ‘ Free remarkable book St. Louis, ; oe Mo. Can use a few experienced Agents

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208 POPULAR MECHANICS ADVERTISING SECTION SAVE YOUR BOD Conserve Your Health and Efficiency First “i Would Not Part with it for $10,000”. So writes an enthusiz istic, grateful customer. “Worth more than a farm,” says another. In like manner testify over 100,000 people who have worn it. The Natural Body Brace Overcomes WEAKNESS and ORGANIC AILMENTS of WOMEN AND MEN, Develops erect, graceful figure. Brings restful relief, comfort, ability to do things, health and strength. Wear It 30 Days Free at Our Expense Does away with the strain and pain of standing and walk- ing; replaces and supports misplaced interncl organs; reduces enlarged abdomen; straightens and strengthens the back; corrects stooping shoulders; develops lungs, chest and bust; relieves backache, curvatures, nervousness, ruptures, c« onstip ation, after effects of flu. Comfortable and easy to wear. Keep Yourself Fit tiscr, o°7 and csdour very liberal propositions HOWARD C. RASH, ots Natural Body Daca Co 223 Rash Building SALINA, KANSAS

Boys and Girls Also

@aE~ Safely. Immediate Results Get Robust Health. Prolong Life. avoid Nery ness, Indigestion, foul breath, Heart Diseas se, regain Vigor, Calm Nerves, mental strengt clear eyes. Send for Free Booklet telling Ww to conquer habit quickly, easily, Safely, Scier- tifically, Pesmansatle. Positively Guaranteed.| L GUSTAFSON MFG. CO., Cleveland, 0./ ¥ Buchstein’s Fibre Limb is soothing tong | gy etré oat. light. Fasy pa ente Br vces for all deform 4. { D. BUCHSTEIN co. Ss a F E

< d . 2 2 y 5 ; Inner surface is gy Now sine made achesive to se . ning, yet Non- cure the FLAPA©- Brigit Pai andWhat PAD firmly to ihe is Within It That p) Fixe Keeping aw 4 gounts 113 Gih St. $., MINNEAPOLIS, MINM. *.O continua , “a Ee

iy applied and the H pad from slipping. || Nostraps, bucklesor. j springs attached. Soft as velvet—easy toapply. FREEt ~ 5,000 Truss Sufferers To the extent of 6,000 sufferers who may apply I will send, ABSO- LUTELY FREE, a sufficient quantity of the Pl<pao to pos- itively convince ‘them thet this is the only logical, common- sense way of treating rupture. Plapao is a highly astringent medication placed wit h 1in the Plapso-Pad and being absorbed through the skin, crea‘tcs a wonderful feelir g of relief and at the same time t« nds to strengthen the weakened muscles and thus permanently close the rupture opening. The process of recovery igs natural, so you’!l have no use for a truss—you can throw it away forever! Old and young have testified under oath that the Plapao-Pads cured their rupture—many of them long-standing, aggravated cases—without delay from work. Patent allowed in U. S. and foreign countries. Awarded Gold Medal at Rome and Grand Prix at Paris. —for asufficient quantity of the Plapao Send No Money ; is sent without charge to enable you to

Perfect hearing is now being restored in every condition of deafness or defective hearing from causes such as Relaxed or Sunken Drums, Roar- ing or Hissing Sounds, Perforated Partially Destroyed Drums, etc \ Wilson Common-Sense Ear Drums 29M ** Tittle Wireless Phones for the Ears” require no medicine but effectively replace what is lacking or defective in the natural drums. They are simple devices, which the wearer easily fits into the ears where they are give it a thorough test; you pay nothing for this trial now or invisible. Soft, safe and comfortable to wear at all tir NE Ss, ever, Write for it and full information today. Address Write today for our 168 page FREE book on DEAFNE Plapao Laboratories, Block 1427 St. Louis, Mo, giving you full particulars and plenty of testimonials - WILSON EAR DRUM CO., Incorporated Please Mention Popular Mechanics 834 inter-Southern Building LOUISVILLE, KY.

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POPULAR MECHANICS ADVERTISING SECTION 209 GET THIS NEW BOOK HEALTH via VIOLET RAY Explaining how to treat yourself at home. You should know the value of this modern, scientific and effective mode of aiding nature to restore health. There is no ‘‘quackery’”’ or uncertainty about it. It isnot claimed to be a ‘‘cure-all.”’ It is powerful in restoring normal physical con- ditions—yet gentle, soothing and perfectly safe. Send for free Book giving full information. PAINLESS ELECTRICIT Current from your light socket is passed through the Renulife Violet Ray Generator and transformed into a tremendously high voltage—but made shockless and as pleasant as a ray of sunshine; penetrating, purifying, health-giving,—and absolutely harmless. ELIGHTFUL AND INVIGORA TING Under this remarkable administration of D electricity, you feel nothing but an invig- orating sense of relief. Aches and pains are quickly overcome and the whole system saturated with life-laden forces bring- ing back normal, natural conditions, While you may apply it over a local area, the results are not confined to that part alone—the blood, nerves, tissues are revitalized, toned and stored. a SENT ON TRIAL 4.20% 2bere} tra! plan ot Y yy: Te ) Free $7 ne what benefits vou can accomplish in your case—not y] ly a few days’ trial but ample time to show real results, \¥ The Renulife is within the ; E xplai nin INEXPENSIV reach of all—towest priced, lp I a £g fective Violet Ray in the world. You a own one, and 9 * the w hole ret all the benefits of having this wonderful treatment at ] , ~~ hand for any use. Write for Book quoting prices, etc, = arvelous If the Violet Ray will accomplish for you results that story of the 1 have despaired of securing, you should know it. Do Violet Ray, its t delay—investigate at once RENULIFE ELECTRIC CO. 1106 Marquette Bidg., DETROIT, MICH. Chicago, 123 W. Madison 3t. Several New vork City, aa ER Models to use, benefits, ete. Learn how you can now em- ploy these great 27 Warren St, ‘urative 2€S roth wares Select curative forces. Adelaide St., From West SEND THE h COUPON (iis tse ee eee ee eeetonnn (16) Oi 10). me 10) - an: 1616) an: PNate Ma) s\ et UM lalielaest-1atets\ Use at Home i wa Health / CS errr ‘ ¢ Be RENULIFE ELECTRIC CO. Live sot Heat Sales : give full ¢ a tor eslmemse checked . * " Delow _ Distributors ty } TREATS SUCCESSFULLY Abse Foe Write for Proposition a Facial meuraigla §— Obesity , . Actnms fom and chest eR arteriosclerosis Paratyats Baldness Go 2 te ro) Co Pimptes nie Fag Maemorrhelgs Pyorches ” Rew sate watoas fatantite wr Sears tasem eis Selaticn starch Lameness Sale Diseases oles Lecemete Ataan Sere Throat ewe > Cnlindates om Threat 0 senses - Deetre® Nervous Afee Seraine Deafness sec tar Moms Toothache Mewratote Weak Eyes Ecrema Neerithe wWrinties . Wert: and Gote . ame : ; Adare ; ‘ , , ; cvescoerersee a Please Mention Popular Mechanics

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210 POPULAR MECHANICS

‘The Carnes Artificial Arm has enabled Edward Finnegan, 413 Olive St., Kansas City, Mo., to continue his work as a skilled mechanic, altho he has lost both arms. His earning power is the same, his efficiency practically as high. To see him work or on the street, you would never think that both arms were artificial. This is because the Carnes Arti- ficial Arms which he wears are inconspicuous, natural in appearance, strong and serviceable. The Carnes Arm is totally unlike any other. It is the only arm that is practical and useful, an: at the same time does not proclaim itself as being artificial Its wearers are able to continue their ordinary occupations, wait on and care for themselves, Catalog Free We will cheerfully send ou our catalog, which fully explains the Carnes Artifi- cia: Arm and shows by actual photographs how Sale sme n, Mechanics, Farmers, etc., are able to use it in their regular occupations. Write for a copy today, CARNES ARTIFICIAL LIMB COMPANY 208 Carnes Bidg., 904 East 12th St., KANSAS CITY, MO.

ADVERTISING SECTION LACASSIA PREPARATIONS of the very highest quality. $300 a month in profits. Let me mail you our c cake of seap, etc., free and tell you all about ou LACASSIAN LABORATORIES

BEAUTY Vanishing Creams, Face Powders, Food Products Soaps, Medicines, Extracts, Spices, etc., are al [Vanish Cold Creams, Toilet Waters, Perfumes I want you to act as our agent and clear from $100 to atalog r $10.00 CASH REFUND

TOBACCO {L Or SNUFF HABIT Overcome or NO PAY! No matter whether used in pipe, cigarettes, cigars, chewed, or used in the form of snuff. Superba Tobacco Remedy contains nothing inju- rious, no dope, poisons, or habit-forming drugs. Guaranteed. Sent ontrial. If successful, costs you one dollar. If it fails, or if you are not perfectly satisfied, costs you nothing. Write for full remedy today. SUPERBA COMPANY, M-19, BALTIMORE, MD. DEAFNESS IS MISERY I know because! was Deaf and had Head Noises for over 30 years. My invisible Antiseptic Ear Drums re- stored my hearing and stopped Head Noises, and will > do it for you. They are Tiny Megaphones. C: unnot be -“iiseen when worn. Effective when Deafness is caused by Catarrh or by Perforated, Partially or Wholly Des- troyed Natural Drume. Easy to put in,easy to take out, Are “Unseen comforts.” Inexpensive. Write for Booklet and my sworn statement of how I recovere | my hearing. A. O. LEONARD, Suite 226, 70 26.70 Sth Avenue, New York City 1 o C

mntil you have tried ¢t that draws the blood to t Koots and starts a hew stops the hair from fall Bought py Doctors and men who know that it ist reasonable HAIR GROWER known to acience THE MODERN VACUUM CAP A. 559 BARCLAY, DENVER, COLO.

JHE N our VAOCUU) is used a few daily. Weacceptr 60) days and are satisfie Vacuum Oap is an ap

M < mir he ( d lk plia he |} heait! crop of hair It stops Dandr ing he « No D1 Used Ww rite for application blank, testimonials booklet on “ HAIR,” sent sealed in plain envelope, Al FREI C0. 574 Lacassian Building _ “ ST. LOUIS, MO ). |

Automatic Fibre Limbs Easy iezment -. Do Nature’s Work AGENTS WANTED who use Artificial Leg. “4

_., RObinson Folding BathTub. Bigse

little, no plumbing, little water 15 pounds, folds into smali roll. Full le

= 2. PAWN KATNANG Brrr oR HEADACHE, NEURALGIA,INFLUENZA AND ALL PAIN= [Ask For A-K Tab For A-K Tabs} "TAB LETS : ar better than tin tubs. Guaranteed | ir a day easily made. Write for free tub offer ROBINSON CABINET MFE. CO. 5170 fasteries Bidg., Toledo, Obie OD WEEE hb Semple, WORMAN CO, Minge? pours © ller. ¢

Weight Z AGENTS $60 WEEKLY ngth bat 0 ye he \

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POPULAR MECHANICS ADVERTISING SECTION 211 MAK GOLDEN DOUGHNUTS

~ wz There's a FORTUNE INIT! This new AUTOMATIC DOUGHNUT M ACHINE will dropGOLDEN BROWN DOUGHNUTS toa hungry pcp- ulace, and drop GOLDEN NUGGETS into your pockets. $25.00 to $100 a Day Can Be Earned With This Automatic Machine

The demand for doughnuts is big. They have taken the cour itry hy ate orm tI MEAN S for supplying this ENORMOUS DEMAND is needed. It's + It's ¢ YOUR one big chance to make a fortane. With one of these Al TOMATIC BovicuNtt " x ; : CHINES you con och fry 800 dozen a day. Doughnuts sell fast at from 30c to 40c a dozer 5 *| - , You Do Not Need Baking Experience to Be Successful = You Do Not Have to Hire a Baker This AU TOM ATIC DOUGHNUT MAC HINE in e disp lay window, market str" ors ma’| store room is all you need UGHNUT vane games, te m SC BTIFICALLY PREPARED timply mix it with water The machine is Pi te: y automatic—feed dough to b and ext it »ppe c I we oderful ly dehcious donghnuts inte boiling vat. A submerging dev viee fries "BOTH SIDES of doughnut at onk TIME. The eaghine is 100 per cent efficient “THIS UNUSUAL MONEY-MAKING CHANCE IS YOURS! sibilities of the doughnut business are unlimited. Bie demand exists NOW — 3.000.000 doughboys and ireds of Salvation Army Lassies saw to that! Buying public is always responsive to anything new and novel } pecially in the production of delicious edibles. Restaurants, hotels. grocery stores and markets afford vou a ready ont t in the WHOLESALE doughnut business. The possibilities in this business are unlimited—it is YOT R opportunit Be the First Man in Your Town to Start in This oa a ee oo a ee eee ee ae ee | Big Paying Business Rrra. 2 et ene 2 A“ NATIONAL DOUGHNUT MACHINE CO.,

| t , The AUTOMATIC DOUGHNI NE -% Sher paahly proven and | Tt i NOW making BIG MONEY for fo men ¢ roagho mut the | 501 Sun Bidg., Dept. A, DETROIT, MICH. ' We offer YOU the SAME SPLE 1D “OP PORTU NITY the very 7 e for whi h you are seeking. No tow 0 email for Bice pesefal | il opera | Send me full details regarding your Automatic Machine CET Ee an ote Se Senees nee TOMA IC acy é He rMSc INE and information about the Doughnut business National Doughnut Machine Co., 501 Sun Bldg., Dept. A, DETROIT, MICH | i | get the profitable doughnut business | t

most complete line of guaranteed transparent handle Razors with Photo, Name and Lodge Emblem e of cutlery Write today for catalogue and terms en Rule Cutlery Co., 212 N. Sheldon St., Dept. 76, Chicago, MI. | _ | “BOW LEGS and KNOCK- Vi i KNEES” UNSIGHTLY

Name sabetnsotdageeese see sone | | Address........ , ee yoseuens BIG (CHANCE FOR ers | MONEY NOW TIME ‘To START = —~ GAG IN BIG DEMAND. wen meecnparion Palo You ps egy BIG MONEY | : Nat'ISoawn Co. Dert.12 Brighton, Mase |

Draw Health from a Lamp Socket Galvolite, newest marvel in electrical healing met! generates true Sinusoidal Current when attached to! socket or storage battery. Relieves pai : nerves, inproves circulation, builds HEALTH | GALVOLITE — employs the lighting current merely to gene

; SEND FOR BOOKLET SHOWING PHOTOS OF MEN ' } : WITH AND WITHOUT THE PERFECT LEG FORMS PERFECT SALES CO. 140 N. Mayfield Ave.. Dept. §, Chicago. Ill. Don’t Wear

new, mild current within itself Soothing ar rating. Successful in Nervousness He adaches, Tor i a russ Rheumatism, Paralysis, Poor Circul: tion, | iver, Kidney Stomach and Heart Trouble and other ailme Brooks’ Appliance, the Not a “Battery” or Violet Ray modern scientific invention, the t | 1 ( ar 2. wonderful new discovery that apparatus but an electrical generator. Give ediate relieves rupture, will be sent on relief and permanent benefit Indorsed by all use trial. No obnoxious spri or Fully guaranteed. E quipment: generator, 2 | pads. prings MR. C. E. BROOKS electrodes, moist electrode, foot plat« : 1 coml < B ks? P Weight, complete, 18 cenceh, Used by Physicians Gubsapathe, Chiropractors, Naturopat! ind other rooks Rupture Appliance healing schools. Needed in every home. Has automatic Air Cushions. Binds and draws the broken parts together as you would a broken SAFE AT ALL TIMES limb. No salves. No lies. Durable, cheap. Sent te whether re ee to prove it. Eyptected by U- S. patents. atalog an iin GALVOLITE ELECTRICAL MFG. CO. BROOKS APPLIANCE CO., 126-D State St., Marshall, Mich. Dept. C. Atchison, Kansas. Send ‘Pon: al for Illustrated Folder

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212 POPULAR MECHANICS ADVERTISING SECTION BARGAINS IN ARMY GOODS! Order Direct From This Advertisement and Get Special Low Price. SABER TODAY. MONEY-BACK GUARANTEE PROTECTS YOU. WE PAY THE a TRANSPORTATION CHARGES. SEND YOUR ORDER TODAY. ae, rt. ; } } “a A i / ‘ P100—TuroCampTent. Very ; \ a) Qe 4 fine Olive Drab Army Duck. Almost i / \\f a good asnew. Comesin two sections. LY v “ Buttoned together making tent 7x12 with 2% ft. side walls. Half Oli P112—U. S.A P199—Boys Scout Shelter section can be attached to auto. eg ay — —— Breeches. Rk: mo Tents. Genuine shelter or‘“pup’' Complete with poles as shown in uc a ents. most tion khaki For eve tents used by Yanksin France. Just jllustration good as new. Splendid bargains day work, hunt “4 the thing for hunters, campers, hik- Delivered.............-. $28.00 made in foursizes with 2 ft. 6 in. camping, ete. Rope red ing trips) Water proof. Complete : walls, (write about other sizes) and re novate iL Give with poles, etc. P101— One section complete 7 ft. x7 ft waist siz Prepaid. Only..... —— 75 with poles. Price,delivered $14.00 Delivered = $15.90 Ortee, delivered. 75c P99—U.S. Pyramidal p1s6 —Steel p P237—Army Mess 4 108— - y , Font, Khaki Color. trench Helmet. toon — Can- Kit. Made of alumi- P165%—Army Haver. § se at ad ; : “" © Direct from France a anvas cov~- num. Ti u ht fitting sack, Extra strong Olive be a, wr t , cen o n ine eomwente of the ered with straps. Used, cover. Combination Drab canvas with harnes«t derful g “yo Pca world war. Fine for but water tight For frying pan and plate. goovertheshoulders. U-ed hunting, fi y Just the thing for boy Doughboys in France } og, Saemaner wen Complete flower baskets, Jar ing, fishing, out- g-outs, campers, hunt- for hunters, tourists, cross with poles a dinieres, et ing trips ers, etc. countr ilkers ‘ stakes, prepaid | $42. 75 Price, del'd 97c Price, delivered 55c Price, delivered 85c Price, AS a Toa 95c = = “Ss a —= P137— Olive Drab Blankets. Reclaimed by ‘roment meth Seachlontiy tila een Genuine wi a Forcamping and touring, eto. Price, delivered $5.75 P225—Miner Tents. Very popular with camp ers, hunters, autotourists P203—ArmyCourierBag. Made of heavy quality leather 7 gproase pa saps ~ Used in France by runners and an Cee. SEOGO 10m P134—Cartridge Belt. Made motorcyclists in carrying mes- oo shelter tents. Size f strong khaki webbing. A con- sages to the front and head- P1IS7—Gas Mask. Used! 7 ft. x7 ft. by 6 ft. high yenience for every hunter and quarters. For Bankmessengers, American troops in Verd in center Complete with camper Nine pockets for she'‘s, boy scouts, collectors, hunters, tor. A relic of the great w poles, stakes, Price, del’d $9.65 Setsn dilivared 4S5c Price, delivered $2.95 Seon te ae ‘$1.42 case. Price, delivered Order Direct from this Advertisement or Write for Catalog of Other Bargains Now! CARNIE-GOUDIE MFG. CO., Dept. P, KANSAS CITY, MO. 14K SOLID GOLD || Here’s Health With 14K Solid Gold Bracelet Do you want them? Strength that is more than mere muscular strength. The strength, health, power and vigor of youth is now within your reach throuch the White Cross Electric Vibrator. Be strong—be healthy—enjoy things the way you used to. Write—iearn what vibration Laay do for you. Adjusted or Silvered Dial ——, poe Lae is | ys a The White Cross Electric benperye Fitted with handsome expansion convertible 14K Gold Bracelet. Jewe nee You can make a Vibrating Chair out movement. Biggest value in “United States. If you can duplicate it fo: Jowelled With Beautiful Gold any chair gi ving results identical wit! $35 anywhere in the country or if for any reason you are not satisfied, we Vibrating Chairs used in the 1 \rge s will cheerfully refund your money Thia watch is a fine timekeeper. Any pita i atoriums all over the ’ Th lady will be proud to wear it. Sent subject to examination. if you wish—no the only \ Sente oy having thie patented f Write today for Our Big FREE BOOK ‘Health and Beauty’’ 7 also mn smu facture White ¢ joss Fil lectric Trona Toate Y vea, Grille me ion Heat He ottne P ne ane il Batte ge = ot UT TER & SONS, Wholesale Jewelers DLED BY RELIABLE DEALERS SVERYUMERE B. (Est. 1 oe) 170 Nassau St., Div. 70, New York LINDSTROM - SMITH "C0., Dept. A119, 1100 So. Wabash Ave., Chicago Please Mention Popular Mechanics money in advance. Order from this ad. You are certain to be pleased with your bargain. We have many euch wonderful offerings in our of Watche Dia Big Bargain Catalog No. 68 2.08 Yours fpr the gsking Orders for this watch aapepted at above price antil “ 31, 19

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POPULAR MECHANICS ADVERTISING SECTION 213

Sterling Construction Cuts Building Costs C.TERLING System Homes are constructed scientifically to afford the greatest saving to the homes oS builder. If you really want a home of your own, one that you can well afford, send the money-saving coupon today. See for yourself what wonderful bargains we are offering in the 1920 book De Luxe of Sterling System Homes. Beautiful bungalows, imposing homes, modern , cottages—all nig apa illustrated and complete with floor plans. Prices are still going up, so 2 be sure to send the money-saving coupon today. Sterling System Homes nate the high cost of handling lumber. Special labor saving machines handle lumber like chain ightning and cut every part to exactness. Your house comes completely packed in one shipment, } all ready to erect. No time and labor lost with the cutting and fitting as every part comes cut to fit. ; Send Coupon f-——— —~Money-Saving Coupon==—=———

—w i-_ - International Mill & Timber Co., Dept. A-135, Bay City, Mich, ‘1 Mull in Arkansas 4 The man who is waiting for a — 4 Bactoeed pl please find 10c. Please send me your 19270 Book De Luxe of : in prices fools no one but him Sterling Homes. Please put me on your preferred list and send me any special ! Prices on lumber and building ma- offer you may make and notify me of any increase in prices. f terials are still going up. Don’t wait —send the Money -Saving Coupon 1, When do you expect to buy? thisspringM thissummerD this fall O today and let us put you on our pre- ferred tier. Be wire and anewer all 2. What te chin cise Of your Loe? 20.0 cccvcicascccvccssctcocsccccsecccccoccccccece "3 the questions in the coupon. 3. What style home do you prefer? bungalowO storyandahalfO) 2-storyO

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Page 342

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“I Now Hear Clearly!” You, Too, Can Hear! Inasmuch as 350,000 users have testified to the wonder- ful results obtained from the “ACOUSTICON,” we feel perfectly safe in urging every deaf person, without a penny of expense and entirely at our risk, to accept the Famous Acousticon For 10 Days’ FREE TRIAL No Deposit — No Expense : Since the perfecting of our new “ Acousticon.” it is - smaller, better and just as strong as ever Just write, 4 saying that you are hard of hearing and will try the I “Acousticon.” The trial will not cost you one cent, for we even pay delivery charges. WARNING! 7 bee is no good reason why every = one should not make as liberal a trial offer as we do. do not send for any in strument for the loaf ub til you have tried it The ‘‘Acousticon ’’ has improvements and pater

mone ted features whict a annot | be duplicated, so no matter what you have tried in the past, for you rial of the *‘Acousticon’’ today and convince yourself — you rs e to decide oeslacce Products Co alin 1307 Candler Building, New York GE PET FO

WANTED— Railway Mail Clerks $1300 First Year y -mageromenanercaanta #” Franklin Institute Common Education ra ng 1100, Rochester, N.Y

Sufficient > ay canta melbece oun Clot Examination questiot MEN—BOYS, 9 Wl showing places of all coming U. 5. I agen preeney Mth Unneces.- a tree | k ce r g th eary. hl ESO ee Ee o

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POPULAR MECHANICS ADVERTISING SECTION Send no ne ts Just ask us to send you either of these wonderful, d ling, genuine Ti

lazz- nite Gem rings to wear for 10 days, If you can tell ne | diamond, send it back. Tifnive gems stand every diamond test. it bros | No.1. Solid gold No. Solid gold Mo. 3. Solid gold | mountin: tight-claw Ladies’ newest mount. rong tooth mour > design flat wide band. ing. Has aguaranteed yuaranteed genuine Almost a carat, guar- genuine Tifnite Gem, Tifnite Gem, almost A anteed Tifnite gem. most e carat, caratin size an sending, send etrip of r fitting around second joint of fing: w Gatisfied upon arriva! se =a $450—then monthly until the pete paid for either one. Otherwise return the ring within ten L a kerund any payment made. This offer | is limited. while it he hy ee a The Titnite Gem Co., Dept. 687, Chicago —_

Battery Shops Need |_= ™ This great salvage machine doubles the life of storage battery plates by pressing com po- sition into grids. Make your shop mocern by getting an PLATE PRESS Made of heavy wood, with ac pcoctatiog finish. Nothing to corrode. Price $32.5 Write tor circular B of other battery shop m« a makers AMERICAN BUREAU OF ENGINEERING 601-1601 S. Michigan Avenue, CHICAGO

Ride a Bike to Work Our free Bicycle Catalog shows twenty Hawthorr i les, from ; lain, substan models te e Streamline Motobib leg you can find just the bike you want—onet you years of at a price that willeay Ask for ¢ 1 Wend F2. londgomeouy MCU or Your Money Ba Ward Xe Chicago Kansas City Fort Worth - Portland Ore USE HB *2¢/sie"© MOTORS

f service

bsolute money kg ) r One to 15 h.p. Choose the size you need. Cash and money W ith gas shortage coming and coal going higher, every home necds this amazing in- vention. VAPOR GAS BI RNER complete with « letailed instructions and beaut reservoir, only $15, guaranteed. Folder free AGENTS: « VAPOR GAS BURNER CO., BOX 523, COLUMBUS, OHIO MAKE BIG MONEY Sell ORIGINAL VAPOR GAS BURNERS invention. Turns common « NOW,

(Not made for gas stoves.) Beware — Make $50 to $100 per week esr sales plan sells three out of fo prospects. Exclusive territory. Write NOW for free contioniags.

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POPULAR MECHANICS ADVERTISING SECTION 215 The Efficient Man’s Motorcycle For five years the Cleveland Motorcycle has been raising the class of motorcycle riders. Its lightness, simplicity, beauty, safety, comfort and ease of operation have put it in the hands of ladies and gentlemen who want independent, available, enjoyable and low priced transportation. plan fothe gallon Cleveland Motorcycles are high class machines for high class people. They are especially popu- Che only two stroke motor, lar with the best people of foreign nations where Ohio vith enclosed fly wheel, The the price of gasoline makes automobiles too ly worm driven motorcycle. expensive to run. Single chain and direct shaft , ‘ . » You can learn to ride a Cleveland in a few ’ el agneto, No red “ti . . , ° . on "Sa hy Ss i minutes. It is equally serviceable for business, . Ss. 0 center o yravi ° . , . . } ¥ . ; sports or vacation. Write for descriptive booklet. | asy « trol, ( ompact, power- P ful le in, Oo »r-size tires a er rer The Cleveland Motorcycle Mfg. Co. . 7209 Platt Ave. CLEVELAND, OHIO | Clevelarit

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POPULAR MECHANICS ADVERTISING SECTION Over 500 welders, garage i menting by experts. 2 now made Silverine Portland, Oregon, Solder. Silverine builds out broken crank cases, repairs pots, Solder permanently repairs cracked istons, corroded salt water pumps, etc. 3lue Funnel Line on one of their ships, Silverine is applied with a soldering iron, sold under a money back” Silverine Aluminum $7.00 per pound. using Silverine. One pans, etc. water jackets, Silverine Saved This Motor s, machine shops, plumb- | ers, ship yards, now using Silverine in Seattle. i new metal on market after 8 years of experi- Seattle Fire Dept. and Water repair man in $62.00 from one pound of Silverine Aluminum Alumi num solder permanently repairs broken manifolds, Silverine Hard scored We repaired a condenser for the saving them over $2500.00. stands 700 degrees Fht. and is guarantee. State distributors wanted. Silverine Cast Iron Solder $3.50 per pound. MacKENZIE-WATERHOUSE CO., Migrs., 717 E. Pike St., Seattle, Washington cylinders, The Solder That Sticks INCREASING THE FACTOR OF SAFETY Crash —two automobiles have collided —one rams into the other broadside What is the enuses Kvidently wrong in ter pretation of signals rhis rccidentcould have been pre ve nted if the forward drive hada traffic signal on his car The WRIGHT Traffix Signal tells the driver in the rear just which direction you are going to proceed—a red irrow on a white dise tells your story it is operated by hand from a ratchet on the steering column entirely mechanical not dependent upon a storage battery ruignets or springs | | The retail price is $8.50. If your dealer cannot supply you, write to the factory. De seriptive booklet sent fre The WRIGHT TRAFFIC SIGNAL CO. Dept. B CINCINNATI, 0, ENG'INE PRICES In the face of rising costs, I have reduced engine prices. By increasing production, making my factory the largest, selling direct to user, I build engines for less and give you the benefit 90 DAYS’ TRIAL cusnint GUARANTEE You have 90 days to try the OTTAWA and you are protected by my liberal ten vear guarantee. Sizes 1), to 22 H-P. Cash or Easy Terms—make ‘engine pay for itself while you use it. EASIEST TO OPERATE OTTAY Ne cuenta cuTuovY ennai Kerosene, Gasoline, 4 Use c he apest gg FREE Send today for special money saving offer and New Free Book. OTTAWA MFG, CO. 536 King St., Ottawa, Kansas Auto Owners WANTED! To introduce one of the best auto mobile tires in the gin oe under our new and exclu Internal Hvdraulic Exp: x] Process that eliminates Blow-Out —Stone-Bruise —Rim Cut ables us to sell our tires u 10,000 MILE GUARANTEE We want an agent in ever) munity to use and introduc: wonderful tires at our ast ingly low prices to all motor car owners. have a plan by which you can obtain FREE TIRES FOR YOUR OWN CAR if you become our representative. Write forb let fully describing this new process and ex} ing our amazing introductory offertoowner ag Hydro-United Tire Co. Birk: 2 _PHILA., PA (\ TIRES THAT WILL SATISFY Guaranteed for 5°00 miles. Reliner free w Used tire efficient! rebuilt and tl et. FS ins before shippi Absolutely puncture and wea ~ Si I Size lire Tubes | Size 30x38 $5. 25 $1. ‘os x4 $8.50 $2.25 ihx4 $10. 50% a0x 3 6.25 1.75 3%x4 8.75 2.50 6x4 11.00 32x34 7.25 1.865 4x4 9.00 2.75 1150 ix4 8.25 2.00 ix4 10.00 3.00 7x5 12.00 4 Send $2.00 deposit on each tire balance O oO » + cagens nation or 5% alli wed for entire om t ether straight side, clincher, non-skid o plain treat TREBLE STRENGTH TIRE CO. 2133 Jndiana Avenue Dep . 211, Chicago, !! “Twin Makes your motor run silently anc 1 smooth!) Six” keeps your motor full of ‘Ps P and power by re moving carbon format? Elimina Stops that ruinous carbon knock ineveanes puwer. re ynaumption No experience or too!s required—you can outs as it yourself in ren minutes at a minimum of cost. Saves from 3.00 to 6 00 dollars. Simply remove the spark pluge and pat two tablespoons of “Twin Six” in each cylinder. Keplace piuge and drive away. Use every 1,000 miles, Easiest Quickest & Cheapest Warranted ee —_ ite Ags injurious Full directi« ipt of $1.00. ms, sent prepaid on rece Nod NEW-AGE SPECIALTY CO.. OAK PARK, ILL. ounce carton.

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Out AR POPULAR MECHANICS ADVERTISING SECTION 217 Wonderful Chemical Discovery Increases the Power of Gasoline Fully One-Third Big Money-Saver for the Motorist . Prevents Carbon, Makes Engine Run a Saves Gas and Greatly Increases Mileage. t be skeptical rhe impossibilities of yesterday are the ilities of today. The entire motor world has been endeavor find a remedy for the high cost of gasoline. The remedy ind. It is here. It is MIRACLE MOTOR GAS il be amazed, astonished, at the way this wonderful prod- iltiplies the power of gasoline. An avalanche of letters er Am erica proves its worth, testifies that it saves up per cent gasoline besides eliminating carbon. Miracle (,a8 1 ised pe gasoline. It is the combination of e Motor Gas d gasoline that gives such phenomenal For example, if 100 gallons of gasoline gives you se 1) gallons of gasoline and one package of Miracle Mo ng $1.00) will give you 2,000 miles. This is eq ‘al to 1 wallor f gasoline (costing only $1.00) or 3c for eact vallor We guarantee Miracle Motor Gas to be harmk hanism of your car We guarantee results claimed r money refunded It is used and endorsed in every the U.S. and many forei¢n countries, Start using le Motor Gas today and you will be delighted with results. \ “Show-Me” Offer to Every Motorist in America Y Mr. Me rist, want to save from ONE-THIRD to VE-HALF on ir gasoline bills. To prove to you that Mi \CLE MOTOR GAS will do this, we make the following ffer: Mail the coupon below to us with $1.00. We will rWO $1.00 packaywes ($2.00 worth) with this under- Use them and if you are not satisfied, tell us so, and nmediately return your dollar. You don't have to ything rh offer applies on your first order only a uur County within 30 days, and fr ill have to pay $1.00 per package. MAKE $125 A WEEK Here, nov within your grasp, Is the opportunity to make from $5,000.00 to $15,000.00 a year. This new, scientific, chemical oad to fortune for one live man in each community We want Exclusive County and State Agents in all unoccupied territory MIRACLE MOTOR GAS positively gives 15 per cent to 40 per cent more mileage from every gallon f gasoline used in an automobile. It eliminates and prevents arbon, the “black plague"’ of motordom: makes engine rur smoother and better in everv way. At the present high price of gasoline think what it means to save from ONE-THIRD to ONE-HALF on your gasoline bills. MIRACLE MOTOR GAS is the biegest, most sensational success in the automobile field Motorists are amazed at its wonderful work Exclusive Territory, 300% Pre‘it. No Com- petition. Read On—and Be Convinced No matter who you are, where you live, how rich or how oor, this is YOUR CHANCE. You never dreamed of a better Opportunity than this. Realize the tremendous possibilities. Ave an ayetT j 4 er opens the r Five Million Automobiles in the U.S. need this wonderful prod ict Thousands of motorists in your County want to econo mizeon gasoline, and are eager to buy MIRACLE MOTOR GAS! Don't you see what the EXCLUSIVE COUNTY AGENCY = mean for you? It may mean your fortune Practically itoowner buys the minute you tell him what MIRACLE MOTOR GAS is GUARANTEED to do Delighted customer astonished with results, will boost it to their frien Your suc ess is sure, positive. Motorists will literally BEG you for it, ynce they know what it will do. ere Ww tail M¢ de me ar mi ye sr Ww GET BUS Y— DON'T waset Don't make the m ake of being a r ng this at Opportunit Our guarantee Protect ou ' »>convince irself beyond the possibility of ibt, send . and we ill send you two package ‘of MIRACLE MOTOR GAS (Re- price $1.00 each) with the understanding after yuu have used them, if you are not entire atisfied, just write and tell so, and we will refund your dollar Remember, MIRACLI ITOR GAS isa proven, guaranteed proy tior It ha monstrated what it will doand now we want hundreds of live n to sell it So vet busy end in you rder for two pach es, or if you prefer ist sign the coup for complete inf ation about this astounding product Tell us what territory uu want But you'll have to act quicl s territor being apped up very rapid Retter vet a cour the way to us ith a do ~~ by return ma wan f j int tern for cl e tight T¢ Ex 66 BUTLER BLDG. “CHAS. A. BUTLER & CO. TOLEDO, OHIO Reference yme Savings Bank CHAS. A. BUTLER & CO. 66 Butler Bldg., Toledo, Ohio. If your proposition is all you claim for it, would like the exclus sive agency for County Send full particulars Enclosed is $1.00 for two packages of Miracle Motor Ga (Retail price $1.00 each If 1am not satisfied after I have ised them, it is understood that vou will refund 1 lolla Narmne

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218 POPULAR MECHANICS ADVERTISING SECTION

as a Floor Surfacing Contractor With building and remodeling going on as never before and with wages constantly reing impractical and impossible for contractors to scrape and finish floors by Jhand This condition was f seen years ago and has been met by the manufacturers of the American “‘Universal” Klectric Floor 5 facing Machine. With this machine one man can now surface more floors in a day than tive or six could do by hand, and will do it easier and better. Machine is electrically operated and can be used on a size floor from a cottage to the largest auditorium. Surfaces floors to walls without hand work; old orn floors make no di fe erence. Machine is simple, wel! built and requires no previous experience to opt rat rican “Universal” Electric Floor Surfacing Machine offers :ou the chance to get into a | siness of your own with bat asmall investment. Every building isa prospect. Contract and architects will prefer your work because machine leaves no sander waves or chatter marks. Lea job clean — vacuum fan deposits dust and dirt in bag. Machine will! pay for itself tirst month and good protit beside.

What Users Say of the American “‘ Universal”’

__ 38, eee in Contracts—Government OK's Wins in ear sanevened he ‘ Boing with the Amer ny Uneeranl o Sne pork, Lpave been Your machine is superior to others in the » work for Gam tof ok et thane eoutracted fur $8,000 worth te be pate rec > ig ! st pens made Please do not send stamps. Price by mail 75 cents. smoothest writing—the longest wearing—the best pe nade (nen denen ally} pen there nce SPENCERIAN PEN CO., 349 Broadway, NEW YORK W.dJ. RAINEY BOX 135 GROVE CITY, PA |

POULTRY—RABBITS - “Raise Them—We Tell You How” Dollars in Hares POULTRY ADVOCATE 75c year. Our Great , "7 r . Rabbit Book25c. Paperoe yearandbook We pay $7.00 to $18.50 and up a pair 90c. Sample of paper and Book List FREE. and : xpress ch: arese. Big Peeite. %... supply guaranteed high grade stock at POULTRY ADVOCATE. Dept. B-8, SYRACUSE, N. Y. lowest prices and buy all perfect pairs you raise. Use back yard, barn, cellar, attic. 19 DAYS Contract and Mlustrated Catalog FREE. FREE TRIAL STANDARD FOOD & FUR ASS’N 407 B Broadway NEW YORK

STANWELD STEEL TUBING Say at IN SHORT LENGTHS one of my rebuilt ype Ag Large Quantities at Attractive Prices ard Visible Underwood Type- Send Us Your Specifications writers, fully guaranteed. Equip- ! es ge we spacer, two-color STANDARD WELDING DIVISION me ey ee a , | | THE STANDARD PARTS COMPANY, CLEVELAND

like new. Try one for 10 days FREE. — Pay only when fully satisfied. Easy ;

Illustrated cata- FREE log on Helpful, Instructive Au- tomobile books: Repairing—Weld- ing—Starting and Lighting—Con- struction—-Operation, Etc. Address BOOK DEPARTMENT D 12 AUTOMOBILE DIGEST, Cincinnati, Ohio terms, big discount for cash, or earn one FREE through my agency —" No canvassing. 200,000 satis- fied customers. — rience. Act aviok and save } . Ask for offer ‘ No. §2 . _

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POPULAR MECHANICS ADVERTISING SECTION 219

Economical! Easy Running! Light Weight!

SAVE 40% ona Dependable Motor Bicycle! HERE is no need, now, to pay more than our low price for a if pond in Power Bicycle of guaranteed quality. We save you from one-third to one-half on the finest motorbicycle you ever saw—durably built to give long service. The Shaw Motorbicycle will take you anywhere the high priced motorcycle will go—over the hills, over sandy roads. Ample surplus power for emergency Simplest and most efficient motor of the rated H-P. yet perfected Magneto equipped—Magneto Ignition—no batteries. A machine that will prove a surprise because of its power, low upkeep and ever ready service. onan The SHAW MOISE 1200 to 1800 miles per gal-

lon of oil. A bicycle of special design made of The Shaw Motor is built complete in heavy gauge tubing, extra strong our own factory: rigidly inspected 10,000 to 15,900 miles per throughout. Fitted with strong wheels gual a = to he exactly is re eh . P arge rved tires omes com sentec ery compact and accessible set of tires. and large rugged tire 1 . : High tension magneto and world-re pletely equipped with H-P. motor anernad tehualden ehor Acie Chain drive with free engine clutch matic lain ation yo ind effi Far lighter, more attractive, easier ; me wn: gp Ragen iy . F ‘ control. Write at once for Free The Shaw Motor Attachment: to ride and much less expensive to Book and full parti ul irs about this If you have a “foot power’ operate than an ordinary motorcycle. low priced dependable power machine. bike you can quickly make it a motorcycle by using the eee . 3 ° ae em oe a ae mye Motor Attachment— Write at once for free - 2 a6 Gs ase “4 the same power unit supplied 1 Shaw Manufacturing Company, with the Shaw Motorbicycle. book on the Shaw Mo- Dept. 376, Galesburg, Kans. | 10usands of Shaw Motor bi i] d Shaw t oroicycie an aw . » comet ‘ oru Oo a) . Attachments are in use in the $ Y D a ; i) Sh : : ; M <—~ Fi ~- — i onh — ! U. S. and foreign countries Motor Attachment and { in dite: attheees weer eieimesionn every owner reports perfect . o me : I satisfaction. . - complete particulars. il tor \ Shaw Manufacturing C sa g P y | ADDRERS ° esees eeesecoee | Dept. 376 Galesburg, Kans. 4 1

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220 POPULAR MECHANICS ADVERTISING SECTION A Thorough, Practical Training for Young Men in a plant known the world over for the high quality of its products — the BROWN & SHARPE MFG. CO. Machinery and Tools Our Apprentice Courses offer you a splendid opportunity. Think of the advantages of obtaining your training in a 30-acre plant devoted to the manufacture of machinery and tools. You Jearn by doing under the instruction of practical men. Evidence of the value of such a method of instruction is found in the graduates of our Apprentice Courses. Men with Brown & Sharpe training are today holding responsible positions as man- agers, superintendents, foremen, expert tool makers, machine designers, salesmen, foundry foremen and superintendents in our own works and in the machinery industry throughout the world. EARN WHILE YOU LEARN If you are between 16 and If you are between 17 and 18 and interested in the ma- 20 and interested in the chinist’s or draftsman’s foundry course, write for course, write for this booklet. this booklet. Write today to BROWN & SHARPE MFG. CO. Providence, R. I. (Apprentice Department) BARTLETT No. 20 ~ T { L = S BENCH SHEAR WATER STILLS, made entirely of heavy copp: For Tool Room, Garage one or three gallon capacity, price $25.00 and $40.0 Metal Worki Sh Et ° respectively. Shipped prepaid by express or parcel post tI Weight eta orking Ops, ce same day we receive your order. Ideal for distilling water 1 Only 24 Ibs. Made of best material and automobile batteries, industrial uses and drinking purpo designed to cut metal up BOYER & co., Y519 Fermam Bldg., OMAHA, | NEBR to No. 12 gauge. Blade ee iene can be adjusted to suit Sea: TWILL SAV “Sf operator’s requirements. Makers of Searight Compound » Lever Snips, Price $20 F.O.B. Detroit. Your dealer can supply you. BARTLETT MFG. CO. 20 E. Lafayette Avenue, DETROIT, MICH. { | AVP. > UY : | | Avil 2678 66 HOLLARS Please Mention Popular Mechanics

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POPULAR MECHANICS ADVERTISING The Money I Make for popcorn SECTION 221

: out of people’s fondness By H. D. MATHERS

I n \ the average 1918 I I he mu ine, or merchant I want ought Liberty Loan but I want to see _ in 1918 I made a net profit of Bonds $50.00 War Savings of of the cash i mone: 83,029.00 and would have made Stamps, and lived well. On May 19 . re ' canta : more, but we were quarantined 1919, I bought me a 5-room cote rop tion before 1 take against Spinal Meninigitis and tage on a fine lot and now own Paper profits’’ mean littlk “Flu” for 11 weeks in 1918, ny own home, and “_ le owt one a _ i and al iade ) ij can’t put them in the rhat is an average of $252 per of profits of Butter-Kist busine pay rent with them month, and many holding : a aoe ike adie. ier alee’ Maaeell responsible positions, do not rhree things have contributed , : make as much, to my success—First, I keep the vhat I want to know sachine clean Second, 1 use only ich of the hard cash For the first six months of ia beat saeceenn’ q hird - I re t profit fer me? this year I made $2,000.00. In sourtesus @© satrens , n , , i9tsS, | paid fer the machine, ; : ™ s how 1] felt when the bought $300.00 Liberty Loan Anybody operating a Butter-Kist K ist Bon Cer tn ola Bonds, 850.00 War Savings Machine is bound to make money 2 Stamps, and lived well. On May they will follow the above d to my attention about 19, this year, I bought me a irs ago. The possibilities %-room cottage on a fine lot and For the amount af investment, eg £2 000 vear clear now own my own home, and all nd the space occupied, I know ittle space 26 x 32 inghes made out of profits of Butter £ no business that will come up fuls a _. Kist business, o or equal the Butter-Kist if awfully — me, Bu H. DM. eu do, please lead n a. 2 t mi sur Sa any reudy to go nto the thine Write for f hiding Os Whine aliens rite for free book . ent kinds of stores. i look s doe ie fragrance of the px ~ : a Me ; Na” Are ; it proves to you A : , . . © peo in actual figures I , come back for ‘ that the Butter- . t Kist Machine Mr Mates and his Better + ist Mac ine. Ste is 5 ¢ . no e@ only one making big © oney with DOES pay S600 to Butter-Kist. Write for f book and “ RB, a yeur in read other amazing letters. 3 ow it pays extra net profits. Ms Write for this book today. It is sent free and post highly p 1 with my Butter-Kist Ma paid to every merchant who requests it. it I du one crowina ere With the free book we will also send full particulars an © cena ag tr —— of our easy payment plan. Write today. Mail the aAGé n profit of $3,029 and would coupon or a post-card, de more bu \ quarantined igainst Spinal Meningitis HOLCOMB & HOKE MFG. CO. d and “Flu” for 584 Van Buren St. Indianapolis, Ind. eleven eekKs 1918 T) se . * see . it an average of HOLCOMB & HOKE MFG. CO., o S4 Van Buren St., Indi 2 $2 per montl , a ‘ cas \ hou ra mn nd me ™ . and man é Rook American New ad ! t 8 = holding respon records and st ate f } ! sible positions, do your machir

not make ag much.

K a : : For the first : a RE six months of Picture of Mr. Mathers’ Home which waspurchasea |)! I mad: out of his Butter-Kist earnings. $2,000.00 In Pletuse Mention

Name Business Address Popular Mechanics

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POPULAR MECHANICS ADVERTISING SECTION laa Old Father Neptune Rej oices With You. Co": Lo te Lo) T’S a delight—this wonderful new Columbia Multiple Dry Battery for Motorboat Ignition and Lighting. It doubles the joys of Motor Boating. A Single Dry Battery of 4 to 15 Cellpower and Absolutely Waterproof A solid unit—no joints—no connections to keep tightened—no metal parts to protect from rust or to keep in running order—just the 2 binding posts you see in the picture. This Columbia Multiple Dry Battery has been tested by the public, and has made good. It’s backed with the OK of the most severe testing 4 laboratory in the world—the open market. p At electrical, hardware, auto supply, and general stores -— garages hardware, auto and. electrical bh j departments. Insist upon having the long lived Columbia Multiple Dry Battery for your Motor Boat, and accept no other NATIONAL CARBON COMPANY Incorporated Cleveland, O. San Francisco, Cal. Canadian National Carbon Co., Limited, Toronto, Canada Dry and Storage Please Mention Popular Mechanics

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POPULAR MECHANICS ADVERTISING SECTION EVERSHARP travels in pockets, purses and hand bags everywhere that people go. Eversharp is ever ready on the instant for any riting % work no matter whether the user 1s in a steamer chair, a Pullman compartment or a busy office. To the railroad inspector checking Freight or the naturalist taking notes, to the houses U ife, shopper, worker, Ever- sharp always is a convenient fountain of easy pencil writing. The balanced barrel holds eighteen inches of lead, sufficient for months. Make sure you get Eversharp—the name is on the pencit. All sizes, all prices. Dealers everywhere. THE WAHL COMPANY, Chicago Eastern Office: 165 Broadway, New York City. Western Representatives: Bert M. Morris Co.,444 Market Street, San Francisco. Canadian Representatives: Rowland & Campbell, Ltd., Winnipeg, C. snada; Consolidated Optical Company, Toronto, Canada _ EVERSHARP Companion of the Tempoint Pen

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POPULAR MECHANICS ADVERTISING SECTION For Lovers of the Big Out-of-Doors ales of thrilling adventures and hazardous hunting trips; stories-—both seri: of fields and streams; deep sea and shallow stream fishing yarns nteresting kind of stories every man «8s. and woman, tox ories which develop within you a better conception and a and humorous short,—the likes to read ippreciation of the ind pleasure in imerica’s Magazine for the Outdoorsman STREAM arer ar , of a sportsman’s life; isan¢ Robert H. Dav ointment of returning tor with you send piratio - s bible and dicti« and sella regularly at $1.50 : wonderful out-of-doors with which Nature has bleased us the primitive and possess an admiration for life in the open van’t afford to let another month's issue exc ape your attention IF °it i> ST tor Old Timer or Novice air-tight, water-proof dope n outdo ‘ That's why copies of FIELD AND : In « y 8 wiedon , WilLH nce Y« in fron m a trip « ty ese are some of the things FIFLD ANI $2.50 send y ombinec di ary Contains la . Money gladly refunded any time within thr FIELD AND STREAM PUBLISHING COMPANY, Dept. 26, W. 45th Street, New York City Sane U8 ereate Consistently practical ~arefully laid away f future reading ar reference inners; intimate, aut! and definite information on all pt m of the een the rt. Hunt, fish and tramp wit i Dilg, Warren H. Miller and dozens of otner disciple f for yu can it by these experiences, getting maximum iwe'll ng. fishing a

Will open 200 different locks and padlocks. Locksmiths, Real Estate Men and House Owners should own a set. Recognized as the most efficient set of Master Keys. Attractive Proposition for Agents MASTER KEY CO., Manhattan Bidg., Milwaukee, Wis.

A GAS STOVE INSTANT-GAS = Makes summer cooking a pleasure. Gives you gas anywhere, = everywhere, in any stove or range Everybody knows ga = means cleaner, cheaper cooking anda cooler kitchen, = Saves hours of time and loads of dirt. Start your stove in- = stantly with a turn of the wrist, turn high or low to suit and stop with another turn of the wrist FITS ANY COAL a i _ = pape ay hg “~ ~5¢ m 1e edo u 1oO aken out in OR wooo STOVE ten minutes. No damage to stove. Simple, safe, odorless, lasts a lifetime Money-back guarantee SAVES MONEY Instant-gas makes its own gas‘from coal oil (kerosene) at one sixth the cost of city gas. Much cheaper than coal or wood. Because of perfect regulation, Instant-gas Cooks and Bakes Better than coal or wood in the same stove. Greatest woman-saver in the world. AGENTS WANTED Writ: for FREE LITERATURE and special low price offer. International Heating Co., 820 No. 7th Street, St. Louis, Mo, = B duo RURRRNO El NTT TTT A ETE You can be quickly cured, if you > TAMMER Send 25 cents coin or stamps for 288-page book on Stammering and Stuttering, “Its Cause and Cure.” It tells how I cured myself after stammering so badly I could hardly talk, for 20 years. BENJAMIN N. BOGUE, 717 Bogue Building, Indianapolis

Amazing Diamond Bargains This wonderful 3 < diamond 1 only $53.45, No mone dowr Send complete istonish ins Diamonds d Jewel: Catalog FREI Barnard & Co., Dept. 1314-(, Chicago, Ill

' Before you buy a Cornet, Trom bone, Saxophone or any other horn, inspect and try Marti In- strument We are particul:r and painstaking in making our goods, but the emphatic p- rroval of musicians : mp|yrepays us. To know ell about Martin Instruments, send yourname and address for catalog and informa tion as to our Six-Day Free Trial Offer. Ask also about the Martin Saxophone, unexcelled in tone and workmanship. Write todey. Martin Band Instrument Co. 433 Baldwin Street Elkhart, ind. Instruments of Supreme Quality Please Mention Popular Mechanics

Page 353

POPULAR MECHANICS ADVERTISING SECTION HAWAIIAN IM. DIAMONDS The Greatest Discovery the World Has Ever Known NOTICE We will not be responsible for any- one who pawns or sells these for genu- ine diamonds be- cause they fool even experts. —K. & R. Read About This Wonderful — and Interesting Discovery For years scientists have been endeavoring to reproduce something to take the place of a real diamond. Something that would give the same lustre, fire and sparkle of a real diamond, but which could be sold for a price within the reach of all. At last we are able to announce to the diamond loving public that the discovery of this wonderful Hawaiian Im, Diamond has solved the problem. Never in the history of the world has any other gem received such wonderful praise — it stands without an equal—it is the sensation of the age. t No. 4—SolidGold No. S—SolidGold No. 6—SolidGold No. 7—SolidGold No. 8—Solid Gold: No. 9—Solid Gold Prices = $1.90 Prices: $8.90 Brices: $8.95 Brice: $9.75 Brice": $10.75 Price. $11.95 Oe No.14—SolidGold WNo.15—SolidGold WNo.16—SolidGold No.17—SolidGold No. 18—SolidGold No. 19—Solid Gold 1K size. AK size. ; lo. 18- o— Price = $1250 Price = $13.50 Prices. $1475 Price: $1150 Price®: $12.50 Prices: $13.75 Wh 1 it i 7ith the same care and exactness— We Guarantee Every Word We Say that it ie fult foe det pe nd aon ienten ond Guest its qualities are lasting—that all that is required to keep it the clear, sparkling gem it was the day you bought it is to clean it with a soft brush, soap and water--we mean just what we say and we guarantee every word. Read Our Bi Free Trial Offe Select the style ring you desire. Send size of finger and we will g r 8 send you the ring C.O.D. You pay postmaster the C.O.D. charges wear the ring five days, and if you can tell it from a real diamond return it to us by registered mail and we will refund ou your money. Or, you can send the money with your order and wear the ring five days. If not satisfactory send it ck and we will return your money by return mail. If rings are sent C.O.D. we add 12c for C.O.D. charges. THESE ARE ALL SPECIAL PRICES, SO ACT QUICK—- ORDER TODAY. KRAUTH AND REED iNoWnoresate sewerens 159 No. State St., Chicago We carry a complete line of Jewelry. Send for our FREE illustrated catalogue.

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26 POPULAR MECHANICS ADVERTISING SECTION Here’s the S Soap that Gets the Dirt Just in from the work-bench — dirty with the grime of the shop; the hard- est thing in all the world to wash off cleanly. That's the time youll ap prec iate Goblin; it dissolve ss every pi article of dirt and lathers freely in the hardest or coldest water; does not injure the most sensitive skin, and leaves it clean and smooth. Goblin works wonders for the hardest worker. At your grocers; if he hasn’t it send coupon for free trial size cake. Goblin Soap RegularTrial Size Cake Free! CUDAHY, Dept. J 111 W. Monroe St., Chicago 64 Macauley Ave., Toronto, Canada Please send me trial size cake of Goblin Soap. Your Nam« Street... . oo secececes Town Grocer’s Name Grocer’s Address Please Mention om Wuhout this Trade Mark i isn't @ Signal Signal America’s Finest Work Shirt Fits to perfection—made o} TubTesT Fabrics—guaran teed wash-proof— wears like iron. Two collars wit! every shirt—comfort or duty —neat on the street Several patterns. Buy trom your dealer —or writs giving your dealer’s name HILKER WIECHERS MFG.CO Dept.P.M..Mound Ave.,Racine, Wis ¢g mal OVERALLS ‘IT should ‘worry about ' Punctures Or with NNER Aamon RES A written guarantee bond tk a aypttepe f satisfactory serv is furnishe S with ovens ars er. fected acim le wv t manufacture these "ER LrMork TIRES Everyb knows that FULL V ALG EK that goes into ar cle manuf tured is put in where THEY ARE MADE. Whe n a tire passes from the factory t the job er, and then through the dealer there is a large overlead expense added for national advertisir the price is double or more than the actual value of the tire rh middlemen do not add one von cont's worth of value to any tir AT Pre odd ie profits an 1 expense. "ER ARMOR TIRES are applied between casit a... and make auto tires Puncture Pro f, prevent blowouts are powerfully ae" ae rough usage, an a best of all, they ar oa te .Oiress to throueh de alors. "ER Limon WEED give you your mosey’s wouth 1 oe 5 rest sense of the word. Don t evrive yourself of the economy and safety gained by the use of NN'E! “ARMOR TIRES Over a hundred thousand satisfied users. Order « complete set today. Heav Armor Heer Size Tube . Tire ube 28x3 1.50 7.00 $2. 10 30x 3 #1-50 . 8.25 2.55 30x: 1.55 8.50 2.60 s2x3' 1.60 8.75 2.65 six4 1.80 9.00 2.70 32x4 1.85 9.25 2.75 3x4 1.90 10,25 3.10 34x4 1.95 : cor-ee 10.50 3.15 35x4 2.00 37xz5.......... 10.60 3.2! We pay allexpress charges when complete remittance ac —~ soe ane We recommend that you remit_in full, thereby saving rges, and the C. O, D. return charges. With your order for NNER ARMOR THRE we will furnish our exclusive agency proposition which will give you an opp« Aa of establishing a profitable business in your territory Popular Mechanics AUTO OWNER’S TIRE FACTORY, Michigan Ave., Dept. 0, CHICAGO Mii, MW ) |

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POPULAR MECHANICS ADVERTISING SECTION 297 NolCt Jot Coeher then a9 tlt BF Dasis Iceless Frigerato ORKS perfectly in any climate, any weather. Keeps butter hard as a brick. Milk stays sweet 48 hours. Fruits, vegetables, meats, bread, cake keep indefinitely. Thousands of satisfied Try 7 No advance payment required. 30,000 IN USE Not an experiment, but a proven success. Hundreds read this one: users. days free. of letters from pleased buyers “We tested Oasis sweet 24 hours next to steam radiator and it kept milk Wonderful.”"—Aurora Dairy Co., Aurora, Il. Stays COOLER than an icebox! NO UPKEEP COS No ice to buy—ever. No chemicals, no sup- plies. First cost is all. Think of the money you will ve, once you have an “Oasis” in your home here is no machinery, nothing to get out of order Nothing to repair, or renew Use « oupon now. BETTER THAN ICE Your igmencter wi prove “Oasis” actually Without the dampness found in ever. cooler than your icebox even the best iceboxes, food kept this way is alway 1 prime condition. No spoilage. No muss. The “Oasis”’ is made of an everlasting porous material like white stone. Wet it with nT that’s a Evaporation keeps Fill out the coupon fora ordinary water twice a week the inside chilled — in all weather! week's free trial at our risk. Free Trial, No Money Down, No Risk SEND NO MONEY Fill out coupon below and get an “Oasis”’ for 7 days Prove its merit before investing asingle dollar. If it, the small purchase price will soon be saved, for never need buy another pound of ice. See coupon. SPECIAL OFFE Don’t wait until you must pay more for your iceless frigerator. Make the test now, while you can take advantage of this special price of $9.75 if you buy. This offer is subject to withdrawal. Coupons honored in the order of their receipt free use. you kee you wil Note: Do not write for particulars; only a test can tell you what Oasis does. Save time; avoid a higher price: use coupon while this offer holds. r—--—------------ | David B. Clarkson Co. *Guicacor ts” Send “‘Oasis’’ by express for free use, without obligation to bu I will return within 7 days at your expense, or remit $9.75 in full payment NAME STREET anp No. . oe eece seeeet

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TTT Titi iii ii iyi Henry Blake Co., Dept. 4135 Gentlemen: for my approval. I will pay $4.35, plus postage, upon receipt of shoes. You will refund my $4.35, plus postage, if lam not entirely satisfied POPULAR MECHANICS ADVERTISING SECTION No Money Just the Coupon ae ON’T send a single penny—just mail , the coupon. We will send at once our famous Blake Field Shoe When the shoe arrives pay the rock-bottom price— $4.35. Try them on. Inspect them thoroughly. If you think that they are not satisfactory, even in the slightest respect—if you don’t believe it is the best shoe buy you ever made — return ‘the shoes and we will immediately refund your money and the cost of return postage. ,For Wear and Comfort Hunters declare the Blake Field Shoe is the most comfortable and longest-wearing shoe ever built. It’s made on the famous Munson Army Last of full- grained, chrome - tanned leather (tan only) specially treated to stand up under hard knocks. It resists moisture that ruins ordinary leathers. Double full leather soles, nailed and Goodyear stitched, sewed throughout with best quality heavy waxed thread. For a Limited Time Only 435 ActNow Don’t delay. A lot of men want this shoe and the supply is limited. Order while this offer lasts and save half your shoe money — but don’t send a penny. We are so confident that this shoe will satisfy that we will send it for your approval. Try them on and then all-around, / heavy- duty shoe that money can buy. It’s a big bargain at twice the price. ee#Send This Coupon a0 Marshall Bivd. and 19th St., Chicago Please send one pair Blake Field Shoes, size ae ee es: FORE oT aE waa decide. We trust in your judgment. But hurry — hurry! Think of it— real old-time, service-rendering shoes for only $4.35. Tear tc.) apeadecensuentioninbuddeeuntacaandasaal off the coupon and send it at once. = Henry Blake Co., Dept. 135 i isiies ee eS m= Marshall Blvd. and 19th St., Chicago, il. Please Mention Popular Mechanics

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POPULAR MECHANICS ADVERTISING SECTION Learn Auto ond Tractor Business ITH Rahe School Training you can easily get into the best paying business in any com- munity. Thousands of town and country loca- tions are without Garage or Repair Shops of any kind. To the Present 8 Million Automobiles Trucks and Tractors, 2 Million new machines will be added by 1920 Production, making an enor- mously increased demand for Rahe Trained men. aher”.. School Established 13 Years—Over 30,000 Graduates

The thousands of former Rahe Students now in business for themselves always call for more Rahe trained men than I can furnish them. These former Rahe Students are in business in all parts of the United States and engaged in all branches of the Automotive Industry. They know what Rahe Training is and always prefer Rahe Trained Men over any others for their business. I will train you to be successful in your own business just as I trained these. LEARN IN 6 TO 8 WEEKS Earn *150 to $400 a Month You learn in my school by actual practice with tools, not books. You work on real Autos, Irucks, Tractors—all types and sizes and latest models. You do the actual work over and over again until I know you have all the principles at your finger ends. I have four creat buildings, 45 acres of floor and operating space. I have 300 Instructors and Assistants drawing high pay every month. Plenty of Ap, aS room, plenty of equipment and plenty of Instructors to give you individual Instruction. RTy Present Enrollment 1,500. Room for 3,000. The average age of my students is and always l Bo NiTy has been under 21. Your age makes no difference. No special schooling required. My IE Om practical training will make you a big success. You learn easily and quickly here. Over Arn, ~ > bo * 30,000 Rahe Trained Men now numbered among the biggest men in the Automotive Industry. fey * o.2 To meet the present big demand .¢) Special | ultion Offer for Rahe Trained Men I am now J i an making a Special Low Tuition Pod - Offer f 2 "ee ‘. , ” e y . Of: for Ful Life Scholarship to thove who some within the next few weeks. Plenty 4” MAIL THIS COUPON for ” Special Tuition Offer and Big Henry J. Rahe .* 68-page Illustrated Catalog giv- Dept. 2892 f ” ing proof of Graduates’ Kansas City, Mo. ‘ Success and showing oppor- FREE tunities now open. Alli sent

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Name =} - ail Ym ee ” Address Age Occupa

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POPULAR MECHANICS ADVERTISING SECTION “THE easiest and quickest vay to repair leaks in ra diators, pumps, ° - jackets, motor head gaskets, hose connections, etc. is with Johnson’s Radiator Cement. It will stop leaks in from two to te1 minutes without laying up the car. It requires no experience to use Johnson’s Radiator Cement—all you have to do is to remove the radiator cap and pour the Radiator Cement into the radiator Ouick—Efficient—Harmless p Johnson’s Radiator Cement will not coat or clog the cooling system. It blends perfectly with the water until it reaches the leaks. As it comes in contact with the air it forms a hard, tough, resisting substance which is insoluble in water and stops the leak. A half pint is sufficient for a Ford. JOHNSON’S CAR SAVERS Johnson's Cleaner and Prepared Wax—make body, look like new. } he “I Johnson’s Hastee Patch—can ‘be applied in two minutes. Joknson’'s Valve Grinding Compound—vgives a velvet seat Johnson's Stop-Squeak Oil—a wonderful spring lubricant p-9q | Johnson’s Auto-Lak—a splendid one coat varnish Johnson's Black-Lac—the perfect { top dre ssing. Johnson’s Carbon Remover— prevents 8067 of engine trouble. Write for our folder on Kee ping Cars Young— it’s free. S. C. JOHNSON & SON Dept. P. M.6 Racine, Wis., U.S.A. |

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