Popular Mechanics 1928-12: Vol 50 Iss 6

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CE ABER Your Television Receiver — Page 1004 25 CENTS OPULAR MECHANICS MAGAZINE WRITTEN SO YOU CAN UNDERSTAND IT SEE PAGE 886 a

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ce ee ee ee ee. SS A A sek Sk FL BB RA A Meh Sk A ae, Make an Electric AC. Set of your Present Radio!

CO)! course you want electric operation of your radio : | » | | loes! R | Ve > > verybody does adio Was never so convenient iever so carefree as now when its only demand on | you is the snap of an electric switch. But if you have a good radio now, don't discard it. \ good time-tried circuit, using efficient time-tried tubes is naturally better than new untried circuits and tubes. There isn't a better A. C. set made than your resent radio converted to use A. C., power. You don't have to change a single wire or alter the set in any And Kuprox has made conversion SO @asy ! way. No harnesses or adapters . no tricky wiring not even new tubes are necessary. Just connect the Kuprox A. C. Power Pack to the battery terminals of your set, plug it into the nearest lamp socket, and your radio operates entirely from A. C. Then compare your radio with the best A. C. set you 1 Compare the tone, tl ever heard. le power, the dis-

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REGISTERED IN U opular Mechanics Magazine S. PATENT OFFICE WRITTEN SO YOU CAN UNDERSTAND IT DECEMBER, 1928 No. 6 | : 6 @ " In || “A | 1] | : Dy iemite 5 fd | | By THOS. M. NELSON R EADY, ation one?” ct it real ilue e hunting of oil \ he man at the microphone flips the \ imite are ithered only b tiie tch that transforms his broadcasting use of very delicate truments: portabl t into a receiving set. eismo pl that record the subsurface ation one—O. K.,” the answer come vibrations set up by the explosion o k vith similar plies from stations strips of sensitized paper, which are lat » and three and then follows the sharp interpreted by trained men ler At isolated points, lving in a strip about Shoot!” fiftv miles broad w ch extends alo1 the e shooter takes a final and hurried Gulf coast, are found curious manitest ince at the numerous dials and switches tio of geologic phenomena known a ore him and jabs down the plunger of | salt domes, These are actually columns of e detonator. There is a split second of rock salt which have forced the wa lence, then, with a deafening roar, the toward the surface through the fairly soft earth quivers and huge rocks and clods sediments that make up the underground p hundreds of feet into the air. Such structure 1e latest phase in the eternal search for Salt domes, with some exceptions, are hat black gold—oil. too deeply buried to give surface indica- But this is all mere surface display. The tions of their presence. Those that do,

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RQ? Oe POPULAR MECHANICS that stratum is domed at any point will be the point where the oil y cumulate. In forcing its way upw salt dome causes the surrounding of rock to tilt and bend. forming tl the desired structures. Hence the ne em ending quest of these subterranean of salt. The organization and field meth seismic surveys or dynamite parties d slightly, but in the main they are all same. Each party is composed of ten to twenty men in charge of a « 1 who plans the shots, designates the mograph locations and frequently « putes and interprets the records. | party generally uses three seismogray so it is necessary to have three operat Also there is a shooter and a loadet lormer fires the shot at the time set operates the that 1S located his station latter is concer} have long sinee — mainly with WSS |} loading of the ho been acquired by } 1] , - ne . disns Various oil com } and the hand the high exp] } oh explos pat e oO t it no L : te . t € igen | } og Ser -c1ectine It 18 necessar to b Le useé 1. \ Isting ; © ¢ | - N use scientific meth r . = ods to find those f , r | ck me 1 ¢ ( deep a to be ~~ oe 1 1 t j | ul cteqd 1 thie S Se. ; riac¢ | 1 ‘ n¢ od e I ¢ (lé ¢ ¢ Mie t | , f17] } ' t | ICCE 1 ind popu ¢ €1S! ( e1 | pioying dynamite | - : , , All Sait domes do not produce oil. nor | | na trict nterpretation. doe any salt Come proper produce o he oil really comes as an aitermath of the salt come in this manner: For « O accumu te In paving quantitie Ss nece ary | t it the cont ne oc} , ne ] : d | | tT ted that it act sa D oO c} the o T eet Hut ) + « | no;Tr € ( ipe \ de Y" Ot ¢ e | , , | ti ( (| on } (le or? eT j | E | , , | he on a table top id \ €a 1 1 1 ‘ L£ood ustration o meant bh 1 1 | 1 ' ale ¢ Lndergrou ( S 2 CLOSE ( ited € R- 1g a ter 7% the ground tery t ‘ ] ] . > ; ‘ ’ A dl At the Top, the Shot Firer Is Preparing His Dynan va rise + the highest noint tha Bomb; in the Center, a Diagram to Illustrate the Re hi poi In the 1 & a ik ‘ , : ‘ ‘ ‘ation between Salt Domes and Oil. and Bottom, the Stratu n Cll it 1S contained: oO, I! Explosion of One of the Shots

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POPULAR oO laborers. who dig the holes lo! Lastly He precedes the namite. there is an advance shooting party by over the permits \ as it moves country, and getting from to shoot on their property. +} shot is to be recorded tne seis- phs are set up about one mile apart, turn being about one mile from point where the dynamite is exploded. such distances between the various of the it is necessary to the bers party, it 1s e a system of communication if is to go off smoothly. Hence radio a very important part of radios that op wavelength. Each is ratus form seismograph party; te on a short in itself a masterpiece, small, compact portable, with broadcasting and re unit ize of an ordinary suitcase. ¢ set combined in one about ] incinl ' 14 ~} : - 7)} e principle upon which seismograpn:s this up by exploding a large oO locate salt domes is briefly vibrations set re of dynamite travel through the nts of the Gult coast country at a about 5,000 feet per second If i pass lome, they are speeded up until the 1 ver. the vibrations throug! ibout 15.000 teet per second Hence | I 7 ] ] ] - ving the distance trom the point of 1 1 . to the seismograph and’ the exact tT yl cl e shot is fired. t] e col ter can determine the exact speed 1 1 1 >I the vib itions traveled wi! en the If they shov 5.000 feet per sec¢ rument recorded them. peed in excess 0 irea is promising and the surround land is worked over with great thor- less. If the speed is normal, the oOting party section or h moves over a » and shoots again. In this wav the re country, or what is under it, is ept as though with a great broom Damage suits frequently come as a re- ult of the blasts. In nee a party was working through some dynamite one in- remely swampy country. A hole was iled with 250 pounds of dynamite. hot was fired: The ripples formed in the jelly- e earth, and traveled on to a small town 1 thev broke windows and shook ere lown chimneys. E ich adult citizen of the When all it was found that the hot had cost about $20,000. claimed damages. the iims were settled. MECHANICS ———E — _—_—_—__—__— Tower of Porcelain Cups Ft under Floodlights at German Tr e F TOWER OF PORCELAIN CUPS FEATURE OF TRADE FAIR , . 444 ) + . ’ " , Pores ill cup 1.200 oF F é : é é i 1 ranged O t € ¢ ( ) é ¢ one ort the mo ett e¢ ¢ é ) ¢ Tece Le Z12 | (re } 1 nated at night bv powe 1 TOwWwe \ iy te é ELECTRIC-LIGHT COMPANY MAY ROCK BABY TO SLEEP | eC CleCcl ( Cc be 111 oOsit ) t add he 1 é 1 é ] to t oO SeT ¢ \ \] has devised a1 lrive ba ch oO ly e¢ 1 to r¢ yu ed 9 cket to have the pow take ove the \ | e ) automatically provides a forward | ward movement of a few feet

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R84 POPULAR MECHANICS “Jap Squares,’ Big Timbers for the Orient, Stacked at a Western Mill before Shipment to Japan; Some of These Huge Pieces Contain 5,000 Feet of Lumber ONE STICK OF LUMBER BUILDS TWO JAPANESE HOUSES More than 5,000 feet of lumber, suffi cient to build two Japanese homes of average size, 1s Sometimes contained in a single huge timber, the “Jap | square, shipped from a large western lumber vard These inches square at d pieces range from twelve to forty irom t venty-tour to forty feet long BEST WORK DONE IN AUTUMN FACTORY SURVEY SHOWS “28 * , : a > Fa lis the season at w nici) Many persons At least this ; do their most efficient work i ‘ngineers who kept is the conclusion « a four-year record of the performance England Che worke1 vere paid on a piece basis and at variou factories in their average over the period showed that there was a much greater output during October than at September and other times of the vear. Mond Ly is a poo! from a production standpoint, the sur howed. but fue day gene}! illy the he Actually, the peak in output was not frequently reached at that time. FENDER SHIELD PROTECTS CAR FROM MUD AND TAR A fender shield, a flexible extension t the regular equipment of the automobile tom of the fender being a pair of pliers. keeps the wheel Irom throwing mud, oil, dust ana tar on the bump 9 os body oO! on persons in thereat The shield is made of a double t hick ness of imitation leather and is at 1 1 tached to the bot the only tool needed

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POPULAR XTRACT FROM ANIMAL GLAND MAY SAVE FIRE VICTIMS ims badly burned in fires may be d by an extract from a tiny gland lo ] ey “+ ( at the base of the brain, according i Detroit doctor. The extract would be tained from Its action, rding to Dr. Oliver Kamm, is to help the tissues retain water. Death to the latest ults from drying out of the body tissue. ver or underactivity of this gland in hu- Dr. Kamm believes, may for a form of diabetes char- ‘terized by excessive thirst. animals. ac ly from ns, according theories, in bodies, be sponsible TABLE AND SEATS FOLD AS ONE TO SAVE ROOM SPACE Occupying only a few inches of space en closed, but affording ample room for ur or six persons when open, a folding ing table, with benches attached, is one the latest units devised for convenience small apartments. The top folds down | one pair of legs, with the benches, The table is opened or h a single movement and is sol ng under it. sed Wi v1 braced. When folded, the article es as a convenient end table. The en outfit weighs only a few pounds and quent can readily be moved about lding Dining Table and Benches Occuny Smz2ll Space, Yet Open to Seat a Number of People 885 MECHANICS Combination of Gasoline Station and Dance Hall in a Replica of a Dutch Mill GAS STATION LIKE WINDMILL ALSO HOUSES DANCE HALL One of the strangest automobile filling stations in Kansas is built to resemble an old-fashioned Dutch windmill. Attend ants are dressed e Hollanders, and the building also contains a dance hal TWO LOST GOLD MINES HUNTED IN OKLAHOMA HILLS Somewhere in the hills of southeastern Oklahoma are two lost gold mines, one of which was never worked. Sear y pat ties have prospected the hills to eal but only a few small nuggets have re warded them. The gold mines are said to by ed the news to have been located , 6 — + the Rev. W. He and twelve In 1 communicat Wis B. Lloyd, a missionary. dians started to work the property, and all took an oath never to reveal the location One mine was worked until all of the easily reached metal had been removed Lacking equipment for blasting, the band prepared to open up the second mine n the interior department issued orders that development should stop. Eve uallv the thirteen in the company all died without revealing the location.

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&86 POPULAR MECHANICS PICK-UP CHUTE FOR AIR MAIL SAVES LANDINGS Mail YDags and other packages can be delivered and picked up without the plane landing, by means of an in- teresting trap ar- rangement a dental surgeon has in- vented, It promises to extend widely the benefits of trans portation by air, as places not included is scheduled stops transport r ce and it ll reduce é the cost of operat ne the lines as well Ue S. Mai as helping to in- crease the revenue. The unit consists chiefly of a wide-mouthed trap. mounted Trey olved + + on a turntable so that it can be 1. s | e) e i most favorable position for the ind direction dictates. placed at the plane, flying as the wv he mail bag or package is narrow end of the trap. lo make a pick- up, the pilot, before reaching the load, lowers cable weighted bv a ball. both of teel The cable is wound and unwound 7 ° 7 “4 on an electrically operated reel. The plane brought down to a cor paratively low altitude, the ball passes into the trap, is dragged to the V-shaped opening at the other end, where it a coupling arrangement placed in a slot of the pick up and to which the package is attached As the connection is made, a catapult shoots the load for ward to take up the jerk that otherwise would occur; the cable with its bu den is quicl hauled up to plane by the elec pacl ave taken and stowed a “ Repeated tests wet Pick-Up Trap for made with the Air Mail, and, Bot P , tom, Reel and Ca paratus at a We ble with the Cou ern flying field pling and Ball not one reported Pilots declare that the load cat and t! th it bag be “hooked” with little difficulty, great advantage of the ystem is of mail or other articles can be picked up or delivered at the same time. This accomplished by an ingenious couplir 1 Should the ball and cable become fouled for any reason, the) unit in the slot. woulda be pulled loose from the plane before:an) damage could be done, but the likelihood of such an occurrence is not considered great, as fields are free from obstructions and the trap is constructed in such a waj that the line cannot become tangled itn it he inventor has succeeded in fashioning a reel-and-cable unit that weighs only a so that but little burden is added to the plane. few pounds yet is very strong,

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POPULAR NOISES MADE BY OYSTERS HAMPER SEA RADIO Of all living creatures, popularly and the oyster has the clam” one of like a is been equivalent to a profound silence. een regarded as juietest, “shutting up ut man has been stringing microphones it the bottom of the sea to help guide his ships, and now the bivalves are accused of creating noisy disturbances! The open- ing and shutting of their shells is regis and the sounds interfere with the proper work- tered on the sensitive wireless “ears,” ing of the apparatus, a radio expert re- cently reported. Something may have to be done, he suggests, for the microphone’s service lies in its sensitiveness. It broadcast the beats of the human heart, the sounds of beetles boring in a tree and of insects eating corn in a crib, and to de- crease its “listening powers” would greatly impair its usefulness. Elimination of the would make the underwater radio outfit the greatest life-saving appa- ratus the world has ever seen, and would make it suitable for seas in any part of the world, the engineer points out. has sea noises BICYCLE FOLDS INTO SUITCASE AND WEIGHS FEW POUNDS Capable of making as much as twenty miles an hour, a folding bicycle that fits into a been introduced in It weighs but twenty pounds and saves the traveler the trouble of checking suitcase, has France, Folding Bicycle for Adults; the Machine Can Be Car- ried on Journeys Packed into an Ordinary Suitcase the vehicle, as it can be carried as an or- dinary piece of luggage. s MECHANICS Food Dispenser Sanitary Containers Instead of Open Jars Which Keeps Bulk Semiliquids in DISPENSER KEEPS FOOD CLEAN AND REDUCES COST For the distribution of semiliquid foods such as jellies, jams and salad dressings a patented dispenser is a substitute for in A gal lon glass jar fits inside the dispenser and when it is empty, it is shipped back to the dividual glass or other containers. wholesaler for refilling. Its contents are removed through a special gate cap when it is turned upside down. DIESEL ENGINES FOR RAILROADS DECREASE FUEL COSTS Three locomotives of the Diesel burning heavy oils, are being used success fully on hauling freight at relatively low speed. As tvpe Russian railways for com pared with gasoline, their fuel consump the with times less, half that gasoline and only about one-sixth as com three to six fuel tion costs weight of carried is pared with coal, while the cost is much less than that of the latter fuel. a Russian engineer, the railroads in the According to future will have to meet the competition of Diesel engines as adapted to automo biles, and will be able to do so by adopt ing the same kind of motive power while specializing in the hauling of freight and passengers over long distances.

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RRR POPULAR MECHANICS Feeding the Sea Elephant at the Berlin Zoo; the Keeper Stands on Its Back and Drops the Fish SEA ELEPHANT LETS KEEPER STAND ON ITS BACK The sea elephant has numerous inter- esting peculiarities, but none is stranger than the manner in which it is able to take its food. At the Berlin zoo. one of these huge pets permits its keeper to stand on its back, stretche its neck and head ] o the rear and the meal is dropped into the open mouth. A sea elephant of this size consumes more than 100 pounds of fish a day. LEAVES SERVE AS WIND GAUGE TO AID FOREST RANGERS Estimating wind velocities is important in forest-ranger work, because their speed vill determine, to some extent, how many men are needed in case a fire should break out. In conjunction with the weather bureau, the forest service has developed means of judging velocities by observing he effects of the breezes on familiar ob- ects \ light wind is one moving not ore than seven miles an hour, It is felt lightly on the face, causes leaves to rustle and its direction may be told by smoke Irift. Next comes the gentle wind with a speed of eight to twelve miles an hour, It keeps leaves and sn twigs in constant moti and will extend a s1 flae. Moderate vw range in speed from tl teen to eighteen miles a hour. Thev raise du and litter and keep sn branches moving. Fre winds blow from. nin teen to twenty-four mil an hour. Small tree leaf will sway under the force and small wav will be induced on inland waters. Strong wind travel from twenty-five to thirty-eight miles a: hour. They cause tel phone wires to hum and make walking incor venient. Gales vary from ———— _ thirty-nine to fifty-four miles an hour. They break off small branche make walking progress difficult and do damage to buildings. Stronger gales blow from fifty-five to seventy-five miles pet hour, They will uproot trees and do con siderable damage. A wind of greater ve locity than seventy-five miles an hour ts commonly classed as a hurricane. SAFETY SAW IS INSULATED TO GUARD ELECTRICIAN For cutting live electric cables and pe forming other tasks where there ordi narily is considerable danger, a safety saw recently introduced, is equipped wit 1 r) = : thoroughly insu lated frame. It of wood, special] treated with a fill ing and insulating varnish that pre vents the material from absorbing moisture or oll. The far end ot the frame is designed to keep the saw from running over upon adjacent cables or other metal parts, an important feature when the work is being done in manholes, and the handle affords an effective grip.

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POPULAR MECHANICS R89 THE FIRST GREAT PASSENGER LINER OF THE AIR Members of the Crew of the “Graf Zeppelin’ Before the Dirigible Took to the Skies for It \} Voyage to Lakehurst from Friedrichshafen, Germany; the Photograph Gives a Clear View of the Forward Control Room and Its Comparative Size; Inset, One of the Big 520-Horse- power Rohrbach Engines Being Hoisted into Its Gondola; There Were Five of These Motors, Each Carefully Set so That the Propellers Would Not Interfere with Each Other | When All Were Working; the “Graf Zeppelin’’ Was Designed Essentially the Same as Its Predecessor, the ‘“‘Los Angeles,” of the U. S. Navy, but It Is One and One-Half Times as | Large and Differs Especially in the Matter of the Fuel It Used; Instead of All Gasoline, | It Burned a Special Gas Which Has Approximately the Same Specific Gravity as Air |

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SIV POPULAR MECHANICS SOME OF THE DETAILS OF GREAT RIVAL AIRSHIPS Putting Finishing Touch on the Fabric Close to the ‘“Zeppe- lin’s’’ Nose, and, at Right, Me- z chanic Inspecting One of the Motors Before It Was In- stalled; These Engines Burn Either the New ‘Blue’ Gas or Gasoline Above, a Rim of One of the Big Wheels of the *“R-101,"" to Be One of the World’s Largest Airships, Now near Completion at Cardington, Eng.; It Is for Service on the England-Egypt- India Route; Right, View of a Gas Valve of the “‘R-101""; This Ship Is 750 Feet Long and the Gas Bag Has a Capacity of Almost 5,000,000 Cubic Feet

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POPULAR MECHANICS 891 <PPELIN’S CONTROL CAR AND HOW IT WAS GASSED

a se View of the Control Room of the Graf Zeppelin,” with the Passenger Compartments toward the Rear; Note the Spaces for the Gas Bags, the Fuel, g Freight and Baggage Storage, the Crew’s leeping Quarters, Kitchen, Dining Room id Lounge; the Dining Room Is Large Enough for Forty Persons at One Time nd Is Handsomely Furnished and Ven- tilated through Large Windows, a Spe- cial Convenience When the Ship Sails over the Tropics; Below, the Air Liner in Its Hangar at Friedrichshafen with the Gas Inlet Attached; Use of Gas Fuel of About the Same Weight as Air Made It Unnecessary to Have Water-Recovery | Apparatus Such as Was Devised by | American Government Engineers. to Maintain Weight on the “‘Los Angeles,”’ Its Engines Burn Gasoline; the Re- covery Units Condense the Exhaust

Dr. Hugo Eckener, Center, with Men bers of His Staff I of the “Graf Zeppelin’’ during the Last Test Flight of the Big Dirigible Before It Started for America A. M., October 11, and Arrived at Lake- hurst, October 15, at 4:38 P. M., Hav- ing Traveled through the Air Nearly 6.000 Miles and Being Aloft About 112 Hours; It Beat the Best Steamer Time despite S« eral Mishaps

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892 POPULAR MECHANICS AIR PILOTS AND VIEW OF EARTH FROM THE CLOUDS -— ———— From Left to Right, An ton Wittmann, Navigator Capt. E. A. Lehman, First Officer, and H. Von Schil ler, Navigator, Three Members of the “Graf Zeppelin’s” Crew Who Made Their Second Diri gible Voyage to the United States with the Giant Liner of the Skies; Their First Trip Was When the ‘Los Angeles,’’ Now Part of the U. S. Navy, Was Safely Sailed to This Country; Left, the ‘“‘Graf’’ under Construction for the Great Journey, Show ing Some of the Special Ladders Needed One of the Ship’s Officers Peering from the Pilot’s Cabin as It Passed over Berlin on Its Last Long Test Flight before the Ac- tual Take-Off to America; Although the Huge Craft Encountered Unfavorable Weather over a _ Large Part of the Ocean Trip, It Showed That Dirigibles Can Successfully Dodge Storms as Well as Jour- ney through Them; the Transatlantic Flight Took Longer Than Had Been Anticipated, but the ‘‘Graf Zeppelin’”” Had Fuel for »ver Forty Hours When It Landed at Lakehurst

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POPULAR MECHANICS 893 S ‘RAPHIC ILLUSTRATION OF GIANT ZEPPELIN’S SIZE

ee

SS ET cee. --

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762FT. 792-FT.

ie i uy ; ¥ escae | te

[ How the “Graf Zeppelin’? Compares in Size with the “‘Los Angeles” and the Woolworth Tower | It Is Nearly 100 Feet in Diameter and Has a Gas Capacity of 3,750,000 Cubic Feet

IN

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894 POPULAR MECHANICS DOCKING THE “ZEPP” AND ONE OF ITS GONDOLAS Leaving the i Hangar; Rear View of the Big Dirigi ble, Showing the | Huge Fins and the | Rudder with Four of the Motor Gon dolas in Sight Far Down the Ship’s Cigar-Shaped Body; at the Left Is a Composite Photograph, to Show How the Dirigible Looked When Moored t the Mast at Its Destination Close View, Show- ing Robert Hart- man, a Camera Man, at the Win- dow of One of the Gondolas of the Giant Ship Just before the Second Test Flight Which Proved It Worthy for the Trip across the Ocean; Note How the Gondola Is Streamlined to Decrease Resist- ance; the Motors Are 520-Horsepower Rohrbachs and Functioned Splendidly throughout the Journey; a Minor Mishap to One of the Big Fins Was the Only Dam- age Suffered in the 112-Hour Flight against Unfavorable Winds and through Fogs; All the Motors and Other Parts of the Ship Are Controlled from the Forward Cabin, the “Brains’’ of the Dirigible

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POPULAR MECHANICS 895 RADIO ROOM AND ITS WIND-DRIVEN GENERATOR One of the Most Difficult Phases of Travel by Dirigibles Involves Handling the Big Bags When They Land; Here Is Part of the Expert Landing Crew of the “Graf Zeppe- lin’? at the Ropes Just Before the Ship Took to the Air for Its First Flight; at Right, a View of the Wind-Driven Generator That Supplies Current for the Ship’s Wireless System; When the Dirigible Slows Down, the Generator Slackens Speed, Too, Hampering the Performance of the Radio Apparatus Radio Set in a German Commercial Airplane: the “Graf Zeppelin’”” Was Equipped with a Special Radio Cabin Fitted with the Latest Types of Receivers and Trans- mitters as Well as Radio Direction-Finding Apparatus; Batteries Were Provided for Operating the Ship’s Wire- less in Case the Wind Generator Was Not Running, but They Were Out of Commission at First and the Ship Was Cut Of from Communication Until the Battery 4 System Was Repaired

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Svo POPULAR MECHANICS DIVERS’ TESTS MADE BY NAVY IN “IRON-MAN” TANK teresting studies o determine the under- iter pressure on effects ot iumans are being le at the Wash- eton navy yard. One of the chief in in size and inten According to weather bureau, t! is due to the natu of the so to the topo N o1 storms rapny of ruments used is a \merica. The wit tank which is*closed ire essentially swirl ter a man has en- ing passages of bi tered, and the pres and relatively c sure inside is then polar currents regulated to corre- and north, a pond to that expe equally broad, b rienced at any de- much warmer, eq red depth below torial winds to he surtace of the . outh and east | ater \MDoisture Using the Pressure Tank at Washington Navy Yard to storm itself incre ; Determine the Effects of the Deep Sea on Divers F condensed from the subject's breath is col ected and analyzed to reveal some of the results of the test on his ive also been system. The investigators | studying the effects of helium, mixed with oxygen, in treating divers suffering from the “bends,” a serious that evelops high pres ailment often after remaining in 1 7 ° ures. Another valuable aid is a telephone hout batteries, more sensitive than the ordinary instrument WHY CYCLONES GROW STRONGER AS THEY MOVE NORTHEAST Cyclonic storms, moving northeastward across the United States or along the At tendency to increase lantic coast, have a in intensity wit contrast in temperature between the t currents. In the eastern part of the U States and and Atlantic, the storms move rapidl northeastward and in this region there Canada over part of t western free access to the supplies of cold from the arctic regions, as there are Warm alr and the lower area ereat mountain barriers. the Gulf of Mexico the Atlantic, reaching this more northet al d colder district, presents a distinct te! perature contrast to the chilly current and the increases as the t air streams farther north. Thi the cyclonic storms that result natut difference move gain in violence as the disturbances pa over the eastern part of North Ameri

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VALVELESS MOTOR K vi POPULAR FOR AIRPLANES esting departure he usual motor ncorporated in a air- but $ two-cycle engine with one moving parts. ng to reports of ent trial perform it developed 200 wer. It weig 251 pounds and, at evolutions per min howed a gaso’' iption of less than lons an hour. The tors declare they +}, rorht duce the weigilt sixty pounds fur- improving the design. Instead of es for the necessary cylinder charge exhaust, the engine has a specially de | piston that passes over two open } in the cylinder wall near the base. action reciprocating A substitute for the usual carbu- introduced and requires no as been ignition is operated directly off the crank- The ve run dependably and efficiently in by two simple gears. motor } position, horizontal, perpendicular or ] ntermediate angle, the inventors de ts light weight will permit quicker and tour evlinders may be un | allow cy but rour to operate. | } i j Cycle Valveless Airplane Engine with a Minimum of Moving Parts MECHANICS 897 Campers’ Kit Which Includes Tables, Chairs and Dishes, All Folded into a Suitcase When It Is Not Being Used CAMPERS’ KIT HOLDS CHAIRS AND SERVES AS TABLE But slightly larger than an ordinary suitcase, a kit for auto campers and othe: travelers contains folding chairs besides a complete outfit of utensils. The kit itselt, vhen emptied and opened up, serves a table which provides comfortable ccom for four modation “MAGIC CURTAIN” OF CHEMICAL HIDES CITY FROM AIR \ pilot flving over a German town ne ; : stuttgart recentiv Was surprised to see > ‘ - 1,1 ] ] group of tactory buildis ys sudadaeniv di appear in a cloud otf tog t rose from the ground. The fog was the first dem- é, . st Liga onstration of a new type ot chemical smoke screen invented by Dr. Reddema a German gas expert, who is nani the * mre curtain” "| T vat) ne? Lile Mnawric Curtain. en CoO nel ere cattered around the buildings, all being ] “y = Vig gas COUuIG button, wired to a central station so the be released by pressure of a single The seaport of Cuxhaven is to be com pletely equipped so it can be veiled in fog to a height of 300 teet. German arm) ; is a much that ottered by the officials believe the chemical fog 1 better defense t strongest anti-aircratt

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ie MY wildest dreams, I never expected to see anvthing like this!” J. H. Baker, retired Pennsylvania rail- bounced haul ian, grinned as he in the fireman's seat of engine 5480, ing the “American” westward at a sixty ile clip. Hew having his first ride in a modern locomotive and over rails guarded by ie cab of train control. rules trafttic automatic t wand that now 15.000 he maLic along more than track miles of eighty railroads in the United States Cornfields stirred in the summer wind ind the original “Old Swimmin’ Hole Rilev fame flashed bv, but livious to the : out on almost fifty years of “American's” grade and oT . Baker was ob- scenerv. He was looking railroad prog 240-ton engine skimmed ress as the shouldered up a gentle down the other side. “We hit seventy miles an hour for a few velled Fireman J. P. Hartley, who was keeping the steam-gauge needle glued to the 200-pound mark with mighty swings of his skillful shovel, gine ook free from dust with liberal appli- cations of the hose. “They used to call us on the c minutes,” en- and the arpet when we did more than thirty. Fifteen was with the old wood burnet ) 5480's eighty regular gait shouted, as took a auto rounds a bend, Baker as smoothly a settled dk under the | drivers curve and then to i long, straight dash of Ape S. H. Bovle, who used t a fireman under Baker. Two generations of enginemen 5480's cab. The started were representative of one service at about the time the wood burners were disappearing from swifter at lines, to be replaced by the more powerful coal burners. The oth: was in his prime now at a period wh« anical a1 mode fiity enjoying mech put a railroads are other developments that train as far ahead of the one of the horse a1 +1 t seventy-five years ago as 1e@ Oxcart whist] was an advance over Bovle pulied the buggy As Engineer cord and eyed the smooth stretch of trac! Baker thinking of the day passengers ahead, was when to get out and help the engine crew load It carried but five twenty sometimes volunteered the tender with wood. enough for a run of while the “American” or six cords, miles or so, was

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1€1 —— -il Little Box That Runs the Train if the Engineer Should Fail; Radio Tubes and Apparatus Play an Im portant Part in the Automatic Train Control, Which Checks Human Errors lo long with enough fuel to carry it 16, 1872: “Run to Brazil wild. Look out hat iles. Where the “American” wa for work train west of gravel pit - If the LO ng on 130-pound rails, the trains of his work train wasn't there, Wood was sup traveled on sixty-pounders, compara posed to find it. “Meet train No. so and re lender threads that quicklv would so the same place vou did vesterday,” was ~h e given wav under the steel giants of a not uncommon form of order. If one > 0 v. Fast passenger engines in those train went past the siding and met an 1 t] ( had a heating surface ot only 1,900) other, it often had to back up and entet an re feet or so. The fire roaring unde the sidetrack from the other end, for man othe reached 4,050 square feet of heating idings were equipped with one switch vhe ce al d, besides that. the engine had 1 ly. he fa t passenger et eine of 1868 an iperheating surface of 1,215 square feet. had a tractive force of 11.900 pounds, a der e superheating feature alone, engineers modern engine, 65.000 pounds and more y oO rd as one of the most effective devel while it carries 250 pout ls or so of stear an ents in railroading. By means of the to the earlier locomotive’s 125, rt. paratus, steam is raised to an ext Engineer Bovle had his orders but they ist le h temperature of 550 degrees Fahren- were written in position light signals every rac} t or more, and practically all the water mile and a half along the right of way days iked out of it so that it has tremen- and were duplicated in his cab on a panel ered usly greater efficiency. of small circles, a separate signal in dot load (rains literally “ran wild” in Baker's for each circle. Three lighted dots at the five Glance at the orders issued to |] top of the panel showed that the track ents el W ood, retired St. Louis division pPas- was cleat he ime signal i] ; “] was nger engineman on his first trip, Dec. the big target guides that flashed past or

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900 POPULAR MECHANICS itself. This is located at the exit e1 each track circuit and consists of an « tric motor which turns a series of « Each one causes a certain number terruptions in the current supplied t track and the interruptions deter: what signal will show in the cab and a the right of way. When the track is « the cam that gives 180 ruptions per minute car the clear signal to Should the train enter a |] but one behind anothe: is occupied, the code matically shifted to inter: the current 120 times a ' ute and the approach-re \ ing signal shows. At the , block, if the one ahead ' occupied, eighty inte: ; tions per minute cause sf! approach signal to be — Now if the t 1 the right of way. By this system, both engi- neer and fireman have the signals directly in front of them, a few feet from their eyes. The “American” was running over a_ section protected by what is known as the “coder” system of train control. Under this arrangement, a code of signals is auto- matically relaved throug electrical impulses and into the engine cab, where the code appears in visible form on the panels on each side of the cab. If the signal should change to re- quire a reduction in the speed of the train, a shrill whistle blows four or five seconds to warn the engineer. He must heed this alarm and acknowledge it by turning a switch which cuts out the automatic-stop apparatus, otherwise the train’s brakes will be applied automatically and it will come to an immediate stop. The current that transmits the signals is picked up from the rails by a receiving bar on the engine, just ahead of the lead- ing pair of wheels and a few inches above the rails. It passes through amplifying : units in a box in front of the locomotive. Evolution of Signals; the American Gate, Top A c eee f the é . | od English Ball Signal, Center, and One of the Fir An essential part of the system ts the coder Three-Color Lights on the New York Central

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| a AGREE ES POPULAR MECHANICS 901 the Days When the Railroad Depot asted a Lookout Tower, from Which the ti Agent, with a Telescope, Could the Distant Plume of Smoke That inced the Approach of a Train, the 10tive Above Was Rendering Good on a Line Now among the Largest Its Competitors It Was a Wood r and Had to Stop Frequently While w Stepped Off and Raided the Piles Kept Replenished atong the ‘rack at Frequent Intervals Tack pt 17 i 7 Women in Hoopskirts and Voluminous Petticoats, Escorted by Frock- Coated Swains in Beaver Hats, Handed Their Carpet Bags to Bearded | Porters While They Boarded the Marvel of the Age, Mr. Pullman’s First Sleeping Cars, Built from Old Wooden Day Coaches

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POPULAR occupied, the coded sig ling cannot As soon caution, current reach the engine. stops, the slow-speed signal appears ind, unless acknowledged bv the engineer, the brakes vill be automatically ap- plied after vhistle oon warning As is the blown. block is regis has the cleared, the fact the panel and the engineer may as tered on cab signal proceed again. The “American” had slowed down for a section track where the coder had not fully the rails, and Baker was given an opportunity of apparatus energized to see that human vigilance is fully as op- erative today as it was when engines were braked hand, often meant confusion and guessing, and by when run-wild orders ee ee =A MECHANICS taking chances was a more or less com: practice. not f A man appeared on the from a Hat climbed part way down his side of the far signal tower. gine, hooked a loop of string over hi from the waiting man and got back a message from the station past whic] train had thundered a few moments fore. Engineer Boyle turned and ot! in the cab gathered around as Har “Something drags Better opened the sheet. from your train. see what it the note read, The train came to a smooth stop Bovle got out to reconnoiter. Inve tion developed that part of a leaf spring had broken off and dropped t track, and it was this that attracted the tention of the alert station man a rock the rigl 1 the trouble, and the “A and rolled into Ind bounded along Way. A can” on minor : i as proceeded cond 11 enite econd In p It was a victory fo1 apolis on time to the the short dela detection of the human eve, the fragment, but while the train was hal A Modern Semaphore Signal, and a Pennsylvania Fireman Pointing to the Five-Light Board Which Shows the Condition of the Track Ahead the automatic train-control apparatus wa functioning, the caution would have shown in the block immediately back of the one on which the “American” wa signals standing, and a rear-end collision woul have been practically impossible unless the

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POPULAR MECHANICS 903 of a train com- behind had will- snored the slow- “ning, s are a lot safer in they were in my id F. M. William- recently retired ore than fifty continuous serv- he Pennsylvania sO Was an in- senger on the e “American” Columbus, Ohio, to ipolis. “Whenever is flagged for any [ recall a certain 1 September, 1893, [ was taking a train m the world’s fair icago. McKinley, then governor Ohio, and a number ot digi itaries were ird. \ brush fire een burning along av, and the smoke obscured the track time to time Near rove, Ind., I saw a irl in tl middle le track. She was a red flag with all ht. | stopped the About the Time of the Chicago World’s Fair, Pullman Cars Went In for Mar- , sph . velous Inlay Work in Contrasting Colors of Rare Woods nd got out to in- e. Just a few rods farther on, a after the run, “and a en bridge was burning. The timbers have changed. too. Did vou see D Imost severed and the structure was Superintendent Rill he to collapse. The little girl had 11\ overalls in t] ~ ba rage se d over a fence and was runnin; my time, most of us eve But I ran after her, brought her look at a division superintet nd he was thanked by McKinley 1] sean me raghn pense i bas” LEGLESS CHAIRS SLIDE EASILY ee ee ee ee OVER ANY TYPE FLOORS | fagged the train with her red pet- \ little later, the French govern- A new type ot turniture made her a member of the Legion duced in France for othce Honor here are no I in t enst me of the romance has gone from Instead, chairs and table e ading. both Baker and Williamson a framework of nickeled tubing eed, but in its place has come a new slips easily over rugs or polished # urement in greater efficiency, better and leaves no marks he é ind far better working conditions. are formed of a frame of bent tubing never expected to see anything like strips of leather slipped over the tubes to matic train control,” Baker repeated form the back t al d sea

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904 POPULAR EARTH IS SLIPPING WESTWARD ON CALIFORNIA COAST A part of the California coast, north of San Fran- cisco bay and about 150 miles in extent, is slipping toward the Pacific ocean, but, geologists explain, for alarm as the movement is ta rate of not more than twenty miles in 5,000,000 here is no cause vears, The phenomenon is believed to be due toa MECHANICS above the sea level, was originally part of this overlapping earth movement ar estimated to be more than twenty from the position it occupied 5,000.00 years ago, geologists assert. The peak has been cut off from the body of the tl t. section by the erosion of streams, ( proof the scholars have that an over! ping such as they picture did occur, 1 fact that rock strata that were fo 45,000,000 years ago, are now on toy other strata developed at much late: Left, C. L. Garner and Paul C. Whitney, of the Coast and Geodetic Sur- vey, Examining a Fold in the Earth’s Crust Show- ing That Westward Move- ment Is in Progress; Be- low, Measuring the Ac- tion at Government Mon- ument on Mt. Diablo; the ‘Slippage Is_ Esti- mated at About Twenty Miles in 5,000,000 Years | the eartl top of the of ice is forced onto another. part of 1's crust being pushed on adioining surface as one cake For some reason not fully understood, the action is ] Mt. Diablo. 3.850 still continuing. feet riods. Another proof to the same eff which they think convincing, is that n shafts which were sunk in the early d of California have now been closed by slow but continuous movement. CONCRETE LAMP-POSTS “SPUN” TO GET HOLLOW FORM Spinning concrete lamp-posts in order to provide a hollow form through which the wires can be run, is the method used in building the new street-lighting equip- ment of St. Louis. The poles were made in the local plant of the Westinghouse Electric company. A steel-and-wire rein- first assembled on a lathe mandrel and then placed in a pole form, made of two sections of metal. After forcing form was the form is locked together, it is stood end and concrete poured into it. | blocks are then bolted in place and filled form placed in a lathe and rot for twenty minutes. The centrifugal f during the spinning throws the concr outward against the form, so that, in ting, it leaves a hollow through the cent« @Write our Bureau of Information. you wish to know who makes or sells a1 Ser article described in this magazine. no postage: the service is free.

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nte n, Ser POPULAR MECHANICS 905 ASH NEON TUBES rELL TROUBLES IN SPARK PLUGS \ new French car, said have the smallest raight-eight engine built an automobile, has lved the problem of ling the driver whether the spark plugs are rking properly. A set eight small neon tubes e fitted on the instru- ent board, with a switch which they can be rown into circuit with e plugs. Failure of any be to glow indicates a ultv plug. The eight- linder engine has a Lu ench rating of nine Model City Being Developed by Coast Lumber Company Has Unusual Street rsepower, or fifteen rsepower according to the English and merican system of measuring, The cyl lers are cast in a single block, with a re of 1.11 inches and a stroke of 3.22 hes, and give thirty miles to the gallon. he gear box, like that of most foreign provides four forward speeds in addi- to the reverse. The car has a top eed of seventy miles an hour. GRIP PLATE FOR AUTO WHEELS HELPS CAR OUT OF RUTS lo provide traction for the wheels of * automobile in snow, ice or mud, metal rip plates have been introduced. They re made to fit various sizes of tires, the under side is ribbed to prevent slipping d the upper surface is also provided ith circular ribs for the tire or the chains to secure a strong rip. The plate can also be used a foundation or a jack in soft round. They are practically inde- tructible, as they are made from mallea- ble iron, and will afford even large trucks ufficient start to be run out of a rut. @ Clover roots are known to penetrate the earth to a depth of nine feet. Layout for Its Garden Homes MODEL CITY FOR LUMBERMEN AFFORDS MANY LUXURIES Workers in a lumber mill at Longvie Wash ‘ live in a model village of some 350) homes, each with ample garden and la and private garage. Seen from the air, the settlement resembles a toy city, and special features are clearly revealed Streets are arranged to afford maximum space for the lots and to facilitate acce to the vards. While the houses have the same general appearance, each has a dd tinctive stvle. The entire city has been built in a few vears under the auspices ot a large lumber company SAYS OIL WILL LAST WORLD THREE THOUSAND YEARS There is enough oil in known deposits to last the world another 3,000 vears, even at the present rate of consumption, Dr. Gustave Egloff, of Chicago, told the recent World Fuel conference in London. Chal lenging an announcement from Washing ton two vears ago that the oil supply might not last more than six years, Dr Egloff said that, with only 2,000,000 acres of oil wells in production in the United States, this countrv alone had 1,100,000,000 acres of possible oil land waiting explora tion and dey elopment.

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ep at Re Oe tome sie 1 ight Hous

( cert ] nce control a l operation ¢ the United b 1 e | St b state O il corp bt © « ot Oak- é t o é t é ) ] ( i is CoO! to t field oon sacle Wand ANN ean n idio-tele one equipment which ott heat Be t] ( 1928 i b and ntain verl connes , ; : .< d 4 } - , , 1 ] nianes e the till are LOO b | Oo ele ( € t n t r \ r ¢ or re i i can airport Che present radio lighthouse keep t Radio 1S De ) iator on his course bv 1 of signal of the the service that ht 1 n the international Morse code Future Vive D Oo Tile ea r ep nthouses | end 1 lio he I in ucil the |] 1s¢ d ( | 1 1 eT! t] { Oo long the ay Trl twent mii¢ ¢ radio 1s¢ e true course, a green light 1 glow on make itself known to the itor trom the dash. When he deviate from that 1,000 to 1.500 miles away. Che first radio course, to left or right, the light becomes lighthouse in the world is operating now red. This will obviate the use of head Irom the ot old Fort S« oO t phones by the piiot, leaving his ears free southern rim of the Golden Gate entrance to listen to the song of his motor, or to to San Fr incisco ] irbor | © se yn . rauge the intensity Ot the wind, by it

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yi? Th e among the struts of his timately, there will be six ese radio lighthouses on the land of the United States, another in Alaska and one [anila, which, with the one resent operating in Hono- will give aviators guidance ver this country and far out on both sides. In addi- a steamship company, op- s liners on round-the- ld service with home port in Francisco, has prepared and appropriated funds the construction of these houses at the principal ports ll for its ships. While these ‘ions, of course, will be used ily to maintain constant with the corporation's at sea, thev also will be tal importance to aviators. e government stations will tain what is known as a tant beam.” This beam be sent out at intervals of a seconds, comparable to a ling light” in seaside light- es for the guidance of ships. stations established bv the ate corporation will be op- ted at intervals, varving with necessity of communicating any one or more of the or with other radio light- es. Each of the radio lighthouses so designed will have a receiving set as and the adaptation of radio tele- ones to this use is only a question of e. In fact, the signal corps is now at rk on the development of this feature, ough radio-phone equipment at present too heavy for carriage on the average rplane. While the signal corps is reticent re- arding details of the radio lighthouses in operation at San Francisco and at A Glowing Ball of Red by Night Is This Beacon atop scot Building, at Detr through directional antenne form, raised on a sin: of about 100 feet The One oo” 7 T .* 1.037-meter wavelength, sen tervals of about three second Francisco signal has been heard lulu, and the Honolulu signal 11 cisco, but the average range bi 1.500 miles and by dav about 1 The two radio lighthouses sel beams, each about ten miles

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POPULAR MECHANICS * Meeting elolial at els JS beams from both e radio lighthouses sbout 1200 Miles erged beams make continuous dashes — true plene course ¢ tf ou ‘ co — t use ) *k Ina nort este! di Unloading Flying Express at the and, . Alt I 1 ] port, Including Packages from New York and Chicag ) | é é na ire lye t to the } i 1 to ird t ot met il ce lu n 125 feet | rh. t 1 7 | | ( Co 1)) ’ ‘ It one ¢ forming in eighteen-foot t ¢ 1 1 1 } 1 Oo t ( int vse beam the base Surmounted th globular ele« , , 1 , the eve e l¢ ) the direc tric | ehts,. their ra VV he hle { ’ 1 1 1 { t irce ire 1 € 1 the t t t ¢ t é OT

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POPULAR MECHANICS 909 } tels, Shops, Garages, Drug Stores, and Other Facilities, Are Grouped around a Chain of Flying Beacons Being Erected the Length of the California Coast by an Oil Company chways, in clear weather at night, tablishments necessary to travel bv air or irtv-five miles and twenty-five miles, by land. All, including the hote vill be ively, in fog. From ten feet above operated on the chain principle, wit e, the triangular tower is brilliant! tandardized price for all accommoda nated with neon lights clear to the tions, meals and supplies. Similar] lat hese will furnish complete illum tes for equipment, repairs and service for the airplane-landing field and ll be established. Every traveler by air- \obile-parking spaces which are to plane or by motor, following this cl und the towers. not onl ll be ble to go on 1 oht i | hese lighthouses are spaced approxi- day, but will know en he starts j ely fifty miles apart, along state hig] hat everythin: ll cost him at eve but not in cities or towns. Twenty on. In other words, a lane of light f them will cover the main-traveled, be laid completely acr the United and-south state highway in Cal States, north and south, from the Canac ia, Oregon and Washington. One to the Mexican border be placed on the Columbia river high , far eastward toward the eastern undary of Oregon; a second will be ‘ated near Reno, Ne\ “alifornia- ida line, and a third will stand at the the ysses the Colorado river into California. he way to the main and to the large es of the Pacific coast. , on the ¢ int where main southern highway ese three will point t rth-and-south chain, Surrounding each of these lighthouses, addition to the airport and motor-park- will be a hotel, cottages, ga- ges, service spaces, stations for airplanes and tomobiles, with repair shops for both; rug stores, restaurants, automobile and irplane-equipment shops, and similar es- While no radio equipment has been in stalled in these lighthouses, space nd provision have been made in them for its use. They can be converted, in a ver few davs, to radio lighthouses, or radio beams can be added to their electric sig- nals. It is announced that the greater part of the chain will be in operation be fore the end of 1928. Recent experiments by the aircraft-radio laboratory of the United States army sig- nal corps, at Wright field, Ohio, have de- veloped the beam which produces the varying lights on the dashboard of the air- plane, and have improved to a remarkable degree the so-called signal b *h as I San eam suc 1 iS used bv the radio lighthouse at

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Architect’s Drawing of a Neon-Tube Beacon for Flyers, with Service Facilities and Hotel and Shop Accom- the Red Neon Light Is Fog-Piercing POPULAR nad fonoiu forme the d d »t dash signals were sent intervals that, though they indicator of the true course, ‘ | , oe “a audible to the pilot tor only a : . : two Weak Pnals ikewise ost. Now, under the ne le ed b ce Shangegra 1 } m - IO engineer at the laboratory, are ent out consta lv. one ] ] ] } . + +4 i ish ad the other a do cK | ed fort i u , ‘ eries of ¢ , alone the true also is reported to have in ( le range of the trans S = ya e (| patchet lo id lighthouse his official lant is be ¢ installed at the lif urport, W ll use radio nd teleg iph the former to e ive to the plane, and the the a itors reply. ] ike t he cher, the main task of the ai t¢ é vill be *T) the plane MECHANICS ese radio te eT? ones Wiil I principally at night, when the pilots | ul flights. the dispatcher Wi ir pilot, and the try national Mor From a ground radio pho 1 speak messages to > transmitted by al to depend on their compasses, or on re arly spaced beacons, in their cross-coy se code Lo locate a plane, the dispatcher wil questions which can be answered by “ys or “no,” until he eventually finds. ve or ten liles, the position of the fl With landing fields, as planned, at ervals ot tl t to filt miles, radio | ouses at central points, beacons of | sibility at each field, and radio commu ‘ation wit lation and danger transportation in t vaters surrounding long with the ot the greate is being conquer commerce, accor d modations Erected around It; ' :; h each airport, much of the tary to! ill be removed from :; 1 e improvements, fo I handicap to aviat ed. he depart len let ic] to W. P. 4 aviation, latter will reply bv inte } f

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re a i POPULAR MECHANICS ae ~ Lights On at the Oakland Airport; power Beam int tes weather bureau has approved irtmever who plotted the “Southern Cri ley ] ev flight of the the in the squeezer wa proposed bv Capt. W. B. Oaklani the Searchlight on Top of the Hangar Casts an 8 the Air, While the Ground Light Is of 30,00¢ 10 Candlepower é er eac t! t the ll 1 ) out the risks that attend ed t ‘ eve t] e be € . s ) ¢ | y Phe expe ‘ I ‘ r } ( t] e ( | ] ] ne ( ‘ lines. one bv the ‘ ( cally cl ed d t eld « e abi e the ¢ Dp er the ciou ‘ ai tc ° expe e be ( 1 ‘ t i ¢ 7 , © Faaie Ng FRUIT SQUEEZER SA é ( } ( r ‘ ; AND PROTECTS I r ove é irea ( ¢ ( ( 1 ‘ oO n els it ea ou ( ( - | c QO 1and W ington ports é ts Ol : ( ] rec] oO check ir Ci . d rep them bv radio to the ile the coast. The pl 1 e I officer of each s!] » tO re é iti twice da with captive bal such as are used by the weather bu Cc u This means that, eventually, the to currents over the Pacific will be charted accurately as the ocean currents O1 charted for mariners. The United cut small handle, the content i- thoroughly reamed ou poured directly into the c —_— 911

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912 POPULAR

Fake Tanks Used as Shield f FAKE TANKS SCREEN SNIPERS IN ARMY GAME ~ e ’ c irn ELV € 1 Cre r Icle 1 ; , 1 r¢€ e to ad e the °'¢ el P : oa FI ed wu ere ne , ré | T ¢ f CE i) 1 t ) ¢ ( rore Om a d } 1 1 t ce could scarce ) ytd rom é . 1° 1 1 ’ enu r Soidiers pu i e blin SOUND-ABSORBING WALLS HELP DEAF TO HEAR Rooms lined with sound-absorbing ma- ial mav improve the hearing of partially ’ . ° people to discoveries at The according , ~] ] a ] } SvVcnologica ibor itor

MECHANICS ad covery a 1 Licleé | , 7 acc dent while sho ' > 1 aealt visitor throug 1 »u Idin i le \ cou di ro] hea ] remat Il most Thitt } ' ] . ut en © Cal ' soun rt room é 7 mie to ear \ T 1s m4 1 11 an ord ry oO VOICs¢ l sortu e¢ ed to be t] 1 ; l u treate 1 S&S Ge ¢€ ther experimen ( 1 1 hrime t ¢ té un l-ab yrbineg 1) ’ icie¢ 7 T 4 e X-RAY MOVIES TO SHOW BONE KNITTING expe € Tog! ) tie 1 ; ( cle oO {] ere ece t des | Popt L€ ( }] il¢ ( , on e é rte e { 7 ie Ise ] th ty , ‘ ] ) el T i e t t ) ] r ( move ipercept t e ’ e ] { o\ t ) e t 1 )] nou 0 da r ( et | moment The first movie t \ iv camera owed the ) l nterior ot a ours to flim, taking one ycture a 1 in inter? ttent exposure 1) Coolidge. inventor of the ¢ ” id e tu special X ra tube 1”) yrdes " e rose might not he designed a

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POPULAR MECHANICS 913 Hobbyhorse Moves over the Floor as the Rider Swings His Weight Back and Forth, Alternately Advancing the Walking Legs and the Body of the Horse King HOBBYHORSE THAT WALKS -xperi | NEWEST CHILD’S TOY hamber, Dr. Sc ( rend unc ( e that walks is the newest could be placed under pressu ent device for the child. The oxygen % tus and re ed | é unusual in that it has six legs. raising and lowering the pressure time front and rear legs end in a short their normal bre ng rate ) 1 - mM. Between them are two o i feet, joined by crossarms. In ac- = WIRE CONNECTOR DOES AWAY S toy 58 ARNE CO MER Sy ANS Sere WITH TAPE AND SOLDER \ he body weight forward and aft 4 7. 1 uA th meat advancing first the \ « ce ch does away I d then the horse. oldering and ping elec ( ineumiies been placed on thi + — OXYGEN CHAMBER SAVES CATS a ee a ee POISONED BY GAS sneha Bindi | 1 ide poisonin suffered st as though ere aon | ( ] carele people who st copper-coated eC ent vile ) n closed garage may e to give ( eq ] bed of its te ors it a ne proce » the wire he ¢ | ped by Dr. Ludwig Schmidt-Kehl, the wires d e « University of Wuerzburg, works a he connect ( e on humans as on cats. The deadly of which serve ( P lust gas is dan- re us because the 1 two ot No. 18 corpuscles of ize to four of Ne e blood, which 14, the « ( rmally Carry OXxy- ou ot m 1 en, will absorb 250 No. 14 to three N es as much of 0. The ( € poison gas as of e either 1 Cross Section of a New Connector for Electric Wires, Ree ee € nte-giving one. Showing a Number United by Mechanical J«

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914 POPULAR MECHANICS BRIDGE TO LINK TWO NATIONS freighters, can pass under. A feature WILL HAVE LONG SPAN the structure will be the custom and imn gration terminals on each side. Parki spaces for many vehicles will be provide and it is estimated that 5,000 cars can b handled each hour by the inspectors. So idea of the magnitude of the bridge ca be gained from the quantities of material required. These included 24,000 tons o structural steel and cable wire, 25,000 cubi yards of concrete masonry, 40,000 barre! of cement, 60,000 square yards of roadw pavement and 8,000 square yards of sick walk pavement. To protect the suspe: sion cables from the weather, they are b: ing covered with a film of special materia coated with zinc and several applicatio: of paint, and are then wrapped with layer of soft wire. IMPREGNATED RUBBER WOOD MAKES BETTER VIOLINS Modern violins rivaling the old maste: instruments in tone are possible if tl wood is impregnated with rubber latex be fore varnishing, according to a Germa: investigator named Ditmar-Graz. Describ ing the process, he says that the rubb: has the effect of rendering the wood per manently elastic. . The Ambassador Bridge, Linking the United States and HEATER FOR SHOW WINDOWS Canada, as It Will Appear When Completed KEEPS GLASS CLEAR Two nations, the United States and : ; : ; To prevent the formation of steam a Canada, will be linked by the $20,000,000 frost on show windows, an electric rad ator, operated from a lighting socket, ha been introduced, It is of aluminum, doe not obstruct the view and is designed t allow the heat to radiate from its full lengt! up the side of the glass and to the top of the window. A steady circulation ot Ambassador bridge between Detroit, Mich., and Sandwich, Ont., which is sched- uled for completion by July 1, 1929. Work on the structure, which will have a main span of 1,850 feet between the two chief towers, longer than any bridge yet built, was started May 7, 1927, and construction “a . , , +4 — warmed air is maintained, and the heate: is thoroughly insulated to eliminate the fire hazard. has progressed so rapidly that the date tor opening the bridge has been advanced | more than a year. The link is the realiza- tion of plans that have been on foot for §—=——— — more than fifty vears. The bridge proper will be 7.400 feet long, and the distance from entrance to exit slightly less than two miles. For a short space in the cen- ter, the clearance is 152 feet, so that vessels with stacks or masts twenty feet higher —— —_ a bee than those now commonly in use on the ; ; x ; a Se ; Electric Heater for Show Windows, to Keep Off Frost lake and ’ feet hioher thay: > ’ = . sixty teet higher tha those on and Steam, Operates from Lighting Socket

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a’s Premier Pleasure Boat Is the Presidential Yacht “Mayflower”; Manned by a Naval Crew, She Enables the Chief Executive to Take Week-End Cruises down the Potomac to the Sea \LL the vachts of America ever gathered together for a regatta, the flagship of the leet undoubtedly would be the “Mayflower,” the vacht of presidents, but behind the comfortable steam vessel which has carried many White House occupants down Potomac to the sea would come some of the world’s finest pleasure craft. here would be the world’s biggest Diesel-motored vachts, a group of them ranging 300 feet in length, fitted out with all the comforts of home, boats capable of Ns? g around the world or traveling 20,000 miles or more without refueling. (HO) t¢ +77 There would be the world’s fastest big boats and the world’s fastest little boats, sey ‘five toot cruisers with speeds of forty miles an hour, like Gar Wood's “Gar Sr d little runabouts, seagoing automobiles, with forty, fifty and sixty-mile speeds iore (nd in the sailing division there would be the great bark “Aloha” of Commo \ nvr ul Curtis James, the cup defender “Resolute,” and a host of others. \t the other extreme of size there might be a fleet of hydroplanes with out rd motors, little craft costing $600 or less, yet capable of making thirty-five or more les an hour and running circles around Vincent Astor's new $600,000 “Nourmahal” Richard Cadwalader's $2,000,000 “Savarona,” probably the two largest Diesel yachts. “Nourmahal,” finished a few months ago in the Fried-Krupp yard at Kiel, Germany, one of the most unusual pleasure craft afloat, for straight stem and cruiser stern ike her look more like a passenger liner than a pleasure craft. How straight stem nd stern are is indicated by the fact that her over-all length, 263 feet, is only three feet ore than the length on the water line. With two 1,600-horsepower Diesel engines, she an cruise at fourteen knots and make sixteen at full speed, while her fuel bunkers carry enough oil to keep her at sea forty-eight days without refueling. With a beam of forty- one and a half feet “Nourmahal” has plenty of room for comfortable quarters, includ- ng a living room 25 by 28 feet; a library 16 by 28 feet and a dining room 26 by 23 feet. She also has nine staterooms for owner and guests, each with private bath, rooms for vo maids and one valet, and accommodations for a crew of forty men.

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CHANICS . 4 MI POPULAR

Page 39

POPULAR MECHANICS 917

Capt. G. Allan Hancock's “‘Oxaca” | é ng Los Angeles Harbor for a se to Bering Sea; Above, at it, King George and the Duke Connaught Aboard the Royal ht “Britannia” during a Race

t Cowes; Below, Senator Marco- ‘s “Elettra,”” on Which He Has Carried Out Many of His Wireless Experiments, Particularly with the New Beam System ae eh Pe | ~—<

Page 40

“18 POPULAR MECHANICS Sails Still Keep Their Charm for Yachtsmen Who Like to Relive the Old Days of Wood Hulls and Canvas Above Is Edward F. Huttin’s Schooner “Humar” under Full Sail

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POPULAR MECHANICS 919 - =. oe? we ey Ambassadors and Min- oo : 4 | isters Were Enter- “ — ee | tained on “‘Lyndonia,” “ . — Cyrus H. K. Curtis’ r aete ay James K. Stillman’s “We- ¥ aa hg — red | nonah II” Anchored in Bis- ‘ ; 7 cayne Bay, Miami, Fla., during the Winter Season } at the Southern Resort; She Is of the House-Boat Type Henry Miller a W. K. Vanderbilt’s ‘‘Ara,”’ , 4 a 214-Footer, Equipped with ‘ | Diesel Engines, on Which ie | He Made a Scientific Cruise y - : to the Galapagos Islands to i * / Gather Specimens of Rare ” Deep-Sea Fish fa | ©) Henry Miller sal i : mn r } . | |

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920 POPULAR MECHANICS When Dusk Falls over the Yacht Anchorage at Cowes and the Royal Yacht “‘Victoria and Alt In to Its Moorings, the Famous Yachting Week Gets under Way

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POPULAR MECHANICS 921 With the Royal Ensign at the Mainmast Head, the King’s Seagoing Steam Yacht Slips between the An- chored Fleet to the “V & A*’ Buoy, Where a Naval Crew Waits to Moor Her

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as a Sct the Fa is Defender of the America Cup “Resolute” Is Raced by Owner, E. Walte Who Is a Below, On gine Rx Astor's Built hal,” New Y¢ rk Rec Re r Clark, h ently POPULAR MECHANICS

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POPULAR MECHANICS 923 j | ; The World’s Largest Diesel-En- gined Yacht Is “Savarona,” De- signed by Gielow for R. M. Cad- 2 walader, Jr., Philadelphia Banker y 7 Fnaes Be rw ‘ \ . : - 4 = = c —— ow tty | OP et eke ae ae a . f PO re : P« A Bedroom and the Liv- | _" ing Room Aboard This “—_ Palatial Two-Million-Dol- 177 \ | \ lar Pleasure Boat; ‘Sa- | } varona” Is 294 Feet in \ — Length and Has a Cruis- ing Radius of 20,000 Miles

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924 POPULAR MECHANICS “‘Nourmahal,” the New 294 Foot Diesel Yacht Built ir Germany for Vincent Ast Is Unusual Because Her Lines Bear Little Resem ice to the Usual Yacht There Is Little About *“‘Nourmahal’s” Library, Above, and the Living Room, Center, to In- dicate They Are Scenes Afloat; Both Have the Charm and Luxury of a Comfortable Country Home, Even to the Big Open Fireplace and the Luxurious Divans | “ ..

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POPULAR MECHANICS 925 -CTRIC MACHINE )LED WITH GAS )RE EFFICIENT er extensive experi- engineers have de- vay to cool elec- ipparatus with gas. iry condenser ata eastern plant, em- | to increase the ef- of alternating nt, has been com- a y inclosed in an air- casing and sur- led with hvdrogen. being a good luctor, removes the ilmost as fast as it a yps. It is then —_ as 1 by internal radi- Foot-Power Automobile Folded and in Use; It Has Speeds of Twenty to upplied with circu- Thirty Miles an Hour vater and is used repeatedly, Other FOLDING FOOT-POWER AUTO tages, besides increased efficiency DEVELOPS HIGH SPEED laimed for this arrangement. The fireproof, unless mixed with a cer Operated by foot power, a folding auto proportion of air, hence even a short mobile introduced in London develops a iit blaze would be smothered quick] speed ot twenty to thirtv miles an hour ick of oxygen. and, when collapsed, is small enough to be sieieacmannitic taken through a door It runs without MODEL RAILWAY IN FRONT YARD *"¢t effort on the part - i a DRAWS MANY VISITORS a ated yor" aaspernlaglie y openyp tata ‘assers-by in a western town halt at a ra in front = the property of a rail AUTOMATIC FIRE-ESCAPE ROPE man, to admire the model railway 1 he has constructed. The minia HOLDS THOUSAND POUNDS e line itself is Attached toa reel ety-five feet long which permits it to hich tiny elec unwind at a mod- locomotives erate rate of speed trains. A six- en eeded, an trestle, sup- tomatic fire-es- ted on forty-five cape cable has been yy is a feature of ed h success e railway. A n Englishschool lel town of ten The line is of steel lIdings. small l capable of suy and trucks, orting 1,000 pour trees and mid- h irplanes are er displays, and whole has been the \ nN lo or ot! eT etully landscaped exit. one o nore ike the assem beit provided a ore realistic Ready to Descend with Escape Rope on Reel each

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926 POPULAR MECHANICS FIREMEN WALK IN DEEP WATER pounds and more to the horsepo WITH RUBBER SUIT while this one weighed less than thre: has fewer parts than the ordinary ga Fireman in Rub- ber Suit with Paddles about His Neck engine, spark plugs, carburetor ar

ignition svstem having been elimir

Besides greatly reducing the fire ha an important tactor when gasoline is yu a Diesel-motored plat e can flv far th the same fuel load, engineers dec] the cost of the fuel is less and there 1 interference with 1 idio apparatus. T] the engine’s test satisfied its builder will not be put on the market until fur trials hay e he 1 made PAPER PUNCHED FROM STAMPS \ SOLD BY GOVERNMENT } ] lhe tiny disks of paper punched fro1 | | : , ' \ perforations in postage stamps | / umed an untore ee! Importance ith the government's policy of eco and are beir old to b Ide Tor is waste They accumulate at the rat 12,000 pound a mont! PrP & A ° ° 1 . fered ror saie overa period trom For tiremen along the docks, a rubbet tember to next Jun € uit that permits the wearer to walk about in deep water nae been demonstrated in TOY ELECTRIC AUTO FOLLOWS Gsermany. An inflated portion keep the FENCE TO GET POWER man afloat while the feet are weighted to aid in maintaining the balance. \ toy racing automobile, driven | ] - 4 ] ] watta tas electric motor, 1s the latest novelty Io child istead of <¢ ack he automol DIESEL ENGINE FOR AIRPLANES care yg aac IN SUCCESSFUL FLIGHT

trips to provide the power contacts, | The Diesel-engine principle of using oil car is provided with a steering arrans for fuel and exploding it under high com- ment so that it will follow the fence eit! pression instead of with a spark, has been on the inside or outside, depending « adapted to airplanes and successfully dem- which way the rails are fitted together. onstrated in a series of test flights. Re- step-down transformer takes current fro: cently, a plane which was equipped with — the house-lighting circuit. such a motor flew for

twenty minutes, landed and took off again with- out the engine being stopped,and again soared, the engine performing satisfactorily. It was of the radial, air-cooled type, developing 200 horse- power, One of the chief triumphs attained in the unit is the great reduc tion in weight. Formerly ; re SOR LaI neh Tiny Fence Supplies a for This Electric Racer, Fitted with Steering Ar- angement That Keeps It near Rails

motors weighed 100

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POPULAR MECHANICS 927 » stati eta semen 1 sie oe) ie VHA, j AN Air Picture of an Air Giant; Radio Photo of the Huge German Dirigible ‘“‘Count Zeppelin’ at the Time of Its First Trial Flight When It Carried Eighty-Two Passengers RADIO PHOTO OF DIRIGIBLE __ travelers who now wish to visit the isla set forth by canal boat throug! SHOWS TEST FLIGHT nis bas ows™ * 7 grasses, droopit x willows and other pic teresting photographs of the trial turesque growtl along the bayou di t of the big German dirigible “Count trict At Grand Isle is a splendid seve pelin,” designed for transatlantic pas- mile beach, pronounced the finest for er service, were sent by wireless a bathing on the Atlantic c t. Oaks, no moments after the big bag had started 300 vears old, grow sturdily and there are ts first run. Eighty-two persons were homes more than 100 years old. The isle’ ed on the first flight of two and one- = geological history extends to the time hours’ duration. when the Gulf of Mexico reached back to i — territory n occupied by the state ot [AT oe eee Oe NO ee TO BE MODERNIZED ee ee nes ot the N h Ame ( ent a nking an island fifty miles out in the they are today and | been inhabited of Mexico to the mainland by means ince 1776. The proposed road. which wa n ae agg road, is one of the tasks authorized recently bv an act of the leg Louisiana state-highway commission lature, has been er discussion for sev- oon to undertake. The objective is eral vears. Not long ago, land d Isle, famous as a summer resort land could be had for $50 an e é elebrated in fiction as the scene of were few buvet it that price ut til 1 e te and other adventure stories. The recently. with the moder leve ‘ r- l will run from New Orleans, whence there. lots |

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928 POPULAR MECHANICS PARIS PET CEMETERY DISPLAYS MONUMENTS TO ANIMALS . . ’ One of the strangest cemeteries in the world l is located on a tiny river Seine, near Paris. There, connected vith the mainland bv the Pont de Clichy, is the necropolis of Parisian pets- cats, doves ~ island in the -logs, ] , ] monkevs, ant 0 er animals, Some of the M arble Tombstones Cemetery for Pets, on a Small Isl the River Seine near Paris; Many Monuments Are Valuable Works Carved by Noted Sculptors } ; | € LTT e¢ on ( ’ t l O! . on ed ‘ ‘ Teli¢ ed € 1act ot the i r ( bv to stone c ; orks Of art B es monument lagn ce 11 ble mausoleums, 1, in ( cS life- re Ca! C 1 « e pet are quite common not unusual to see luxu limousines halt at the cemet: gates and their owners de Lo place a sheaf of flowe1 A regular, almost da visitor keeps fresh flowers on the grave « a little fox terrier that died recently f1 too much rich food, lack of exercise complications due to inhaling too mu rich perfume. In life, the little terrier | its own apartment, a private maid, c and butler, as well as a “beautician” look after its toilet. When it died, the

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POPULAR vere burie 1 in a casket of silver marble vault, with cription inlaid in gold to tell of UNCLE SAM GUARDS OYSTERS protect the consumer of oysters 1 in interstate co1 1 merce, an elabo- pection system has been built up, he result that epidemics due to pol- hellfish are almost unknown. The ter beds are watched by state authori- he water examined and passed as free taint, and the oyster gatherers and vhere they are prepared for ship- inspected. The plants which have 1 are then certified to the States public health service, and if te approy cl } ; latter finds con 1s are proper, the s added to an approved list sent to ite health departments. HAND-LIFTED BALANCE BRIDGE STILL USED IN ENGLAND old hand-operated balance bridge is in use over a canal at Rickmansworth, kinghamshire, within twenty miles of lon. To open the draw, it is only ary to give a slight tug on a chain ring from the balancing beams, and to e it, a chain on the opposite side is be lifted. nell Old-Style Balanced Bridge Still in Use over a Canal within Twenty Miles of London, England MECHANICS 929 WATERPROOF MAIL BOX SAVES CONTENTS FROM DAMAGE US i MAIL| > = vies ” Inventor Pouring a Glass of Water into His Rainpr Mail Box, Built to Protect the Contents A waterproof mail box with its inter o arranged that rain penetrating it i ried out through an opening in the ba without coming into contact with the n has been demonstrated before post-ofi officials by a Baltimore inventor. It possible to pour a glass of water direct! into the box without wetting the content AIRPLANE TAKES NON-STOP RECORD FROM BIRDS \T _ | PY sata ne , ] ian has at ia outdistanced the b : . 48 ‘ , 1 and now hoids the und puted not Dp flying record of the worl i. The late A turo Ferrarin, Italian flver, whose rec making flight from Rome to Brazil c ered 1736.7 m les, beat by about 7 KH) 1 he flight of a giant albatross which from the Crozet islan off the coast of its neck a frantic message from thirteen shipwrecked sailors of the French vessel “Tamarais.” Proof t stopped for food lay in the fact that the drawn so tight it could not swallow. Aviators also wire holding the message wa hold both speed and altitude records over the birds. The highest a bird is known to have flown is 20.000 feet. while aviators have gone to more than 38,000 Bi never fly faster than sixty miles an hour except before a gale,

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— A Movable Ceiling, Adjustable from Six to Fiftes yitations. Feet, and a Big Photo-Electric Cell. ¢ : national. tate and + Amount of o Measure ti ( pt ite nt Light, Are Features of the New Sunlig iro Test Building research agencie have focused intensive tudy on the mysterie ot artificial light mal illumination which can filter throu; Phe riddles of electricity, illuminating ga glass and provide poor, medium or gos alt dl even acetvlene have bee} explored reading condition at various points wit! from the bottom up and from the toy in the house factory or othtice.

Page 53

rder to eliminate as far ible the effects of smoke, rit ‘ 1 } ) ind ot! ier foreign material | as the undesirable en- ents of adjoining build- the government experts heir amazing house of on a grassy knoll at Ar- Farm, Virginia—the grounds of the depart- of agr culture where fe conundrums are The site is a part of tt mous Park Custis estate ( e George Washington was lcome guest and often ed fox and hounds, e glass house looks some- like a cross between a school and an old- countrv church. The test is thirty feet square provided with a trick ich can be raised or ed at the desire of the ex- enters, while the walls argely of open faced vindows, shaded inside t-tight shutters of wall A Brightness Meter on the Roof Measures the Illumination Source i | ‘7 he Sky Thile Tests re Made Within By means of contre the Sky While Tes Are Made V ‘ ke those on awnings, four sections in the gla house were white Howevet1 e ceiling are adjustable at any height as the research progresse irious othe to fifteen feet This permits of vall colors will be experimented wit! ng the best height of ceiling for Data of vital importance to builder and day ight exposures, mterior dec: rators will be obtai ed trom are twentv-four windows, each this scientific research, feet in width, which extend from a It will take from one to two years— three feet above the floor to the possibly longer for the government spe- The total window-glass surface cialists to complete the research which regates 1,440 square feet. By means’ thev have outlined for the glass house the adjustable interior shutters. the No news about the results will be avail lding can simulate the possible light ex- able until the conclusion of the tests. It a sure in any conceivable structure which is Uncle Sam’s invariable policy to make 7 ght be built for human occupancy. haste slowly in such fundamental experi . Wall color influences indoor illumina- mentation Tests are repeated, results n measurably, but previous to these na- are checked and rechecked and all sources s nal tests, nobody has known definitely of possible error are eliminated from the . t colors were most desirable. When picture. Sufhce to sav that the data al i e accompanying photographs were readv obtained prove that the glass-house le, the ceiling, shutters and woodwork tests will revolutionize and standardize 931

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932 POPULAR MECHANICS 4 { 4 } i ‘) t ( T)1}] { {) pu ¢ I 1 ‘ e € ¢ ) t elec © cr 1 ¢ 7 ¢ p t’¢ t r e « ¢ { i . \ I r the é ( 1 t é ¢ C4 ¢ ¢ ¢ ( t ( t eene ¢ t ¢ ( Ve ( yl¢ ( é ‘ ¢ | | t t T ( - —_ — - neiueeesmdianeiiaen al T T 1 ’ g I » € the | ec C Duy te Pos € t ‘ e 4 } t C Ar I the Test I ! é hee 1 1 ne ce 1 ( é Ole ore ere co t oO é 1 i oOocdcE Too ( thre experiment rie t \ llé fierent t oO! 1 1 1 ] 1 nN ( ded to ft rt\ te T ta oOo | ect eq + } | | 4 é er | nin ne i he t matic tive ( a ti é e¢ ip t 1 each test o T es oO te ( tie Né Y ] 1 , a p ex! e « ount and d posure 1 1 ve lowered a i the r re ' t hn ] no ’ » ¢ t ] satt "1 ¢ +} ¢ ( ¢ are mace i repe e¢ oO one l ( e no! f e 1 tat m of the umination at that one ot tne east ma ne removed. | ticrlar ' + r ] : of £9 ~~ > f | ] 4 - pa Cll DO a a ¢ tance thirtv inche possipie combina I 0 Wight ingre ae: , Mies telus ah thee atin heing tected ant ¢ Of € r oO! e ordimar’ry be C ester out. , dl ) table | €@ al mnt of 1 onatan pt Il, Sa ele ] ee - 1 1 : aa Mintle 1 ] > +1 ‘ Lilt ation ODservations are made only In a certain room depends adairectlyv o1 1 1 ‘ 1 1 ' 11 , on bright and sunshinvy or overcast cloud, rightness ofr the ‘V¥ visib.e trom t ( 5. W ork 1s di continued on davs when tation tl rough the intervet ing windo the un is alternately bright and shrouded Hence the brig htness of the sky gover 1 cloud This is due to the fact that the davlight intensitv in home. office, shi light values vary within a. surprisingl or school. Sky brightness varies widel wide range in brief intervals on such days being from ten to twelve times greatet he influence of direct sunlight is also some points in the heaven than at othe neglected on the assumption that the aver- Science report that the brightest sectio

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POPULAR se to the sun while minimum bright- ; found at locations ninety degrees the sun. Brightness increases again lly from this point of minimum to rizon. the roof of the glass house near ington, a brightness meter is ted in order that the light intensity it section of sky which is the source loor illumination in each test may easured. This device consists of a »-electric cell fitted in a revolving rec- tlar case and attached to a large metal which resembles the bellows of a ra. It is connected by insulated wires second chart recorder, within the house, which writes the record. a result of early tests in the cam- to prevent evestrain, some states pecify that the window-glass area be equal to at least one-fifth of the pace in a schoolroom, nlern factories that consist of huge of glass set in steel frames also are ing stones of building progress. Fu- manutfactories will be better lighted c 4) rn ] ever because of the present glass- MECHANICS 933 In the future, the health, size, stature and stamina of the human family may be increased correspondingly by the use ot pecial glass in houses which lets the ultra violet rays indoors, The normal health ot the sedentary worker may be improved materially by the use of similar glass in factories, offices and warehouses. The government plans to initiate some such experiments in its curious glass house. As a result, future generations may become a stronger race of human be ings, more efficient workers, endowed with greater resistance against disease, and will live much longer than the normal man of the present age. STEAM STORAGE IN FACTORIES INCREASES EFFICIENCY Improved methods of storing steam gen- erated to operate engines have been devel- oped in England and Germany, enabling plants to operate at greater efficiency, ac- cording to reports. The basic idea of the system is to store up exhaust steam o1 that which would otherwise be wasted when more is being generated than is used _ So Ces et a The Glass House in Which Uncle Sam Is Attempting to Solve the Problem of the Best Arrangement for Day- light Illumination; the Sunlight Recorder Is Shown on the Roof

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+4 POPULAR MECHANICS r uTriIace i ] ] 1i¢ i placed , > be r the 3) er the eat ea ure t tO! ie ce » « 1 oO Of the tatest ¢ 11t OI Cast teel « 1 det with jointed p \ 1S needed, beca these suits are equippe with compre sed air b tles, and are connect ith the ship bv « and telephone. \ Liter it was brousg the surtace, the té opened It containe TeW banknote bu diamond Phe Company t t | 1¢ el he .) é ere the wreck, but not known S operatio1 re to | } t t ued not » 71 1 . I d t] 24 td i | } Diving Outfit Used in Hunt : | ng tor Diamond Treasure ) practice ror the | Believed to Be on Sunken temnt to : Liner; Note the Grappling ee Hooks at the Ends of the Lusitania Sleeves; C ympressed Air Bot | tles Inside Supply the Diver | with Fresh Air, and He Has RUBBER-TIRED DISK a Phone Cable to the Ship = o USED FOR HOME = _— = Py = — BOWLING GAME DIVING FOR DIAMONDS HIDDEN “#n be played in the home recentls IN DROWNED LINER been placed on the market by an eastes manufacturer. Instead of bowling ball Where are the 10,000 diamonds, wort} light discus, covered with a rubber tre about $6 .2504 4M aid to have beet unt 1 used, W Ot d block mou! ted on rods \ e Belgian line Elisabet ¢ torpe ed om Oo! vater ofl Be f Ile é ef oO! St Nazaire, oO! the | ( Bise coast? Tl is am out whic d of puzzled deep C ere a | go hemselve ist \Nugust when thev were hunting for the treasure of this drowned liner. The in urance company aVs t] at the jewels were put in the liner’s strong room, while the ownet are positive they were in a afe in the captain cabin The first diver dvnamited a wav into the mail room but — , . Bowling-Game Outfit That Uses Rubber-Tired Disc a way into the captain’s cabin and brought Instead of Balls; the Pins Are on Bar found no treasure Chen the divers forced

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POPULAR mounting hole is MECHANICS 935 off the center, ivs comes to rest in a vertical posi- \ rod behind the ets checks the disk hrows it back. so ere is a chat ce ot ng another pin on ebound [FE STORY OF BIG DIAMOND TO BE FILMED life storv of a dia- to be filmed in ith the con- nd assistance of the d queen. Che dia- 1 +} the famous Koh- which was pre- to Queen Vic- bv the East India company after it e into the companv’s possession the death of the Rajah of Lahore annexation of the Punjab. The trace the recorded history of the from 1304, when it came into the of Ala-ud-din, emperor of Delhi 1 carries the history back much er, but from the time of the Dell or its successive owners are more 01 known wo centuries after Ala-ud e stone belonged to the son of Ba e founder. of the Mogul dynasty probably this stone that Aurung » used as an eye in the peacock throne, h some authorities hold the eve ne was the Great Mogul, from the da mines, and that the Kohinoor ly a fragment of it. In 1739, the dia- 1 belonged to Nadir Shah, the Per- conqueror, from whose descendants issed to Runjit Singh. At one time history it was sent to the laundry in pocket of a pair of trousers and res- “1 by an Indian servant who thought pretty piece of glass. When it came the English crown jewels, the stone 2 carats, but it was improved recutting, which reduced the weight 106'4 carats. It is still the sixth biggest imond in the world. @ The largest existing bird is the ostrich. 3oxing Arena with the Ring on Platform, Which Can Be Raised or I with the Fighters and Referees DISAPPEARING RING IS LATEST IN BOXING CIRCLES ti ippe o ) , 1 1 movie the € na ee! inte ) . 1 "1 prize-nent 1 gg wil a ne installiatiol . } ] " * ] , a I cisco ihe ring the p to | 1 ( ei¢ | 1 ] vered to the ( ent, the g ¢ id seconds, \ t 7 + > ? T ] 77 ] ° ] +1 + +} > vr ereree, step aboard, and then ( I 2 . 1 1 1 es into view, with the principal ear i ited In thei corne . 1 ile N ’ ' en save the f ers the troupile t 1a) & thei i oug t] e cro ! O 1 Oo ) 1 ¢ mm é CHAIN LINKS EASILY PARTED THROUGH PATENT SLOT i ( ! can 7 eng ened or ened at Vv | yu e use of | i id \ thou irring the finish, is being made, par ‘a &@ ____} ticularly for use in chandeliers. The links have a small opening on one side, and when the openings of two links are brought together at right angles, they can be slipped apart or joined -owered }

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936 POPULAR MECHANICS PLANTS SUBJECT TO SUNBURN SCIENTISTS FIND The browning of plants under the rays of the sun is akin to human sunbu + +} ] Y to reports made o the accordin ection ot the British association for ience, Dr. E. M. De advancement of sci ecretary of the botany group, report that exposure of plants to the ultra rays from a quartz mercury-vapor - th aa? ttt % ha caused the plants’ skin to turn bro and that microscopic examination sho ee . , a breakdow n or the outer taver ot ce STEREOPTICON IS COMBINED WITH PHONOGRAPH synchronism with a talking machins produce an illustrated lecture A stereopticon which can be operated Rem e cn | invented by an El Paso photograp ania ’ Parachute Jumper with Portable Broadcasting Outfit rhe two units can be placer sata! Used to Describe the Thrills during the Descent console cabine t, or oper ited separatel CHUTE JUMPER BROANCASTS «6— -*87_Sist4nce from cach other. The ; , ; & opticon ai-o can be usec b lecture! DURING HIS DESCENT ee es hing ger present 1die \ out e al ot i! Broadcasting a description of. how it istant, as the lecturer can ¢ feels to be floating down to earth with a 1 parachute was tried recently at Los An- geles, when a jumper leaped from a plane at 20,000 feet Carrying a tin, portable transmitter which weighed less than twen- e pounds, The message were picked up i low il LatllOo a d rebro ar tona \ ele t for oine receptlti EIGHTEEN-CARAT RED DIAMOND FOUND IN SOUTH AFRICA An eighteen-carat red diamond, the rarest tint of all, has been found in the Lichtenburg diamond field in the Trans- vaal, South Africa. It has been valued at $20,000. Diamonds are fou of the rainbow, including blue, green and vellow, but red is the rarest of all. The nd in all colors diamond is a curious case of fault being worth more than perfection, for the red tint is due to impurities within the stone Blue stones rank next to red in value, the largest known one being the famous “Hope” diamond. The biggest known green stone is a fortv-eight and a halt carat one, slightly paler than an emerald Combination of Phonograph and Stereopticon Which Delivers an Illustrated Lecture without Human Aid which is now in the Dresden museum.

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v7 a D ich POPULAR ME HANICS PECIAL BOATS FOR AUTOS CARRY MANY CARS 937 oO? r 150,000 sbyile rade j L« ere le ered to . | cle Li¢ ’ ite | e; ( din to rée- . + . ? if | C { ip ( oO the (sre: rf t Water delivery t tried in 1918 - } a ri. a but ] i o come era 11S€ é 5 Several boat pe- le ned {to ¢ ce ca not yv b rile e other } + i ¢ bP pre a dec} = on ore and grain Looking Toward the Pilot’s Compartment in the Sikorsky Amphibian Yacht , 14 Built f a New York Millionaire yound up the lakes eir usual cargoes, at AIR YACHT HAS ALL COMFORTS Sees See teen rere OF A RAILROAD PULLMAN é 0 ( T 1 SU OS le ( 50) te 175 Cc \ e 4 t , } f ( t ¢ aecKk o t ( Gg Ca 0 n a I r (le t 0 l r ee! l ! Sil mwnort ¢ Lin lol H WI e ( d € abo ra é \\ é ( ) Owe t ¢ are p 1 er ) ) ~ Ke r \ bloc] o ¢ et (re r { nece d \¢ » Ire t Cc » tO ¢ ( oO er the it¢ bh t ] he pilot ( 1) lk e deal ive ( dera ne t 1 Bacl tl i 25 i i) { { i> ‘ 1 } s¢ oe ( pi a ( COLLAPSIBLE MAIL CASE GIVES ‘ cKe ROOM FOR SORTERS \ collapsible case, provid- space lol the old ] e ied mto a ll space and put away until needed again, has =, ~~ oa been invented by North Dakota man. While in- tended primarily for rural-route it also can be used in large ottices and factories, MU . post offices, GERMAN AIR LINES OPERATE (,;e i: of the « Iie cii¢ ~ e! ¢ utes ’ e I l one ( 163 to During t few bu atl oO! are id carri freigh oper. 40,000 MILES DAILY e re it T¢ ing I uie ft t ( ¢ ] ; 4] a il¢ l wo eg © + rtm) é 1 Ne sand a r cr ¢ n ) e}] 1. ( bh vc ¢ 102 ne same perio I 112.750 miles a9 this ert -> ed 6,531 passenget t Subsidiaries ot the } + iting throughout e Luft hull wm O60 hig ering

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Mi MI b a hm Ff 7 i Y 1 and played at ad e, sounded f ’ . NY ‘ + i ne ite! \ « , | 1 but t one . + + | 1 11 é i ft t ; T kK 1e ) 7 + ] e Wo ence A sou ] r r ] nN ( uae! oO! 1 drop 5 enot to cause the perpetrat to ! ] 14 f ¢ ) ec, TOTeVE ( a) ec ¢ ie@~ou 1 , 1 force th of thouea ] 1 : 1 a il vort I 0

€ i!) e r up 1 € tres rt ne 1 actress¢ ‘ | one + eR Knterny? no i } el! €€ ire ( m e\ ‘ eck , Ing apparatu t it e1 rle¢ evel i 1 ‘ 1 tO carry aiong a i y-machine re¢ 1 , Oot tie De - voice to demonstrate ‘ 1 1 1 the director just how ne soul ds w he 4 1 at F corded And the producers are stagit “14 . wild race to build the best and mo 1 or ; soundproot udio stage frst. Where it all is going to end none « predict. Recording a musical accompat ment fora standard film is one thing, | ting the characters out with dialogue a1 rate is another What he rest of tl world thinks about the great speak movie rush was summed up recently b The Shaded Lines at the Left of the Picture Form the G. A. Atkinson. movie critic of the Lon Sound Track, Recording the Roar of the Battle Planes in the Distance

don Iexpress, when he wrote:

(pif) Is inenu- ss Ae AZT c* Ty A wm Tf* oo

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t] erica’s remarkable ( pede over ‘talkies’ actically made a ent of the film-pro- tt ng industry to Brit- It is no part of my e pose to inquire why ood has suddenly 2 led to double-cross destiny. What tt so obvious, but is t to a few clear- ted men, is that Hol- a film-produc- center, may be rush- n commercial ui- e British critic out that hile the lt i ca tell it language One of the G and 1 t . . lant Spe akers speaking dominions, the Curtair renine either the American-speaking voice American dialogue might be accept 1! e to English audiences, e great tampede, as Mr. Atkinson but try to record ue betwee names it, has been just that; as actors, and every | automobile, pr | n upheaval as a Klondike gold rush. destrian o1 et o be heard On the technical side, an entirely nev and distract the udience attention e is had to be learned, and it could be Absolute quiet | essential that di ned only bv bitter experience. The rector who learned the game _ yelling blem of making falling water sound through a megaphone no e to tall re e itself was not an exception, but the vith their fingers Soundproof studio y 1l¢ Practically everv sound that had to with eight-inch concrete walls, hermeti ) e recorded was successfully registered cally sealed door nd deeply padded after painstaking experiment to de- walls and ceili are used, To eliminate ne which wrong sound would pro- the clicking of the camera, it is operated e the right effect. What goes into the inside a padded chamber and shoot croplione and what comes out of the through double plate-glass window \ftet nd ecord or the light band on the film, de- the action has been rehearsed, a whistle ne ending on which of the two processes is blows and from then on absolute silence he ed ometimes differ entirely. must reign n No one has vet solved the problem of In a padded lookout room, high up on by king outdoor scenes for the talkies It the wail of one studio, an observer checl n- quite simple to make a news-reel shot the action while tening to the voice a parade or a cheering baseball crowde coming through giant loud speakers exX-

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940 POPULAR tctiy ke those whic \\ be used in the theaters In the recording room, experts ind blend th regulate stand at mixing e out- put of the v the volume and pass the current on to the the master panels arious microphones, recording apparatus, where record is made. When the the talkie , 1 sounds on tne process is used, itself, what dif- other , = ac line n recording him the result is achieved in a some MECHANICS lavers of crete l re eparale acoust plaster, with a dead-air space between tl two. The roots are six inches of concre and steel, with inner ceilings of acoust naterial. Che doors weigh two tons ea ball and of steel and acoustic material soundproof. Ventil f by ducts between the run on -bearing tracks are bu to mal ation is take double wal them care oO supplied with air from a distant fan house | HOW CAMERA TAKES A PICTURE OF SOUND ry 0. , MICROPHONE @® —- WAVES PERFORMERS . ENTER SENSITIVE AND POWERFUL VACUUM TUBES |: || Drecurnen evens te “Acoruaer TUBE, A Re- @) THE ELECTRIC CURRENT. NOW . “int! SVE TO THE SUGHTEST VARIATION OF ELE Tac CARRYING THE TRANSFORMED LY ~ IMPULSE THE CARRIER WAVE CROPHOM prows PUaCUGe hath Lda ae Ste THe wines To 1 THe AMPLIFIER, WHERE FILM THROUGH A TINy SLOT, (SEE@) iTS INTEN SITYWINCREASED ABOVE) THE RESULT ISA OF mic OVE LO0Q.000 TIMES BY THE SLOPIC LI OF V + gs ASIMPLIFIED SECTIONAL VIEW ~ A= FILM ASIT PASSES THRU" | j BELOW IS REPRESENTEO A B1T OF THE FINISHED PRODUCT SHOW 'NG ACTION AND Ms PHOTOGRAPHED ON THE SAME STRID | Seneee oar 1S ABSOLUTELY AND AUTOMATICALLY SYNCHRONOUS fio ferent wav. The current from the micro- phones passes through the mixing and control stages and then back to the cam era cn on 1 sel ive light play- ing, through a narrow aperture, on a trip at the edge of the film. The varia- tions of the current from the microphones light to fluctuate, and when the cause the him 1s developed it show ba ids ot shad ing \ light of constant strength in the projector will then fall on these. and that part of the light which passes through ac- tuates a photo-electric cell. the output of which, amplified many times, is trans o the loud speaker Metro-Gold: main stage mitted At the there is a VVvT) studios Mayer 100 by seventy-four fifty- and house feet, a control room, fiftv-four by eight, a a twosst second stage of the same size, ory recording building to the electrical apparatus. The recording building is almost as large as the main tage. All the buildings have thick con- crete walls, going down to vibrationless piers, and floors sixteen inches thick, con- sand four sisting of a six-inch cushion, four concrete inches of cork, Within the inches of and a double wood floor. con the air passing through filters that remo all the fan hum Such elaborate precautions are nece sary because some of the microphone used are so delicate they can pick up footfalls of a fly and amplifv them unt they sou | ke |] immer DIO S 4 1! e . 4 far Talking movies are not new, in fact the were demonstrated vears ago, but it not until the fall of 1926 that the indu try became vitally interested Curious enough the father of all talkies—the tele the parent of movies, for, in their of the phone—is present form 1e telephone labor Bell Telephor ways to improve are a by - product tory. Engineers of the company were hunting the telephone. Asa result of their expe! ments they developed various which included the of huge loud speakers used to carry speaker’s voice to 50,000 or 100,000 people trical method side issue public address Syste in a single audience; the elec phonograph of registering records: the orthophonic phonograph horn, and, finally the talking movie. The latter was turned over to the West Electric which builds all ern company,

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94) ‘HANICS Mk ¢ LAR POPU

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942 POPULAR MECHANICS rhe director calls for a hearsal. The actors through their scene, spe their lines distinctly, c fully omitting the hi sibilants and tongue note (Assistant directors, formerly bellowed out co: mands for lights and car era, now glide softly on ru ber-soled shoes. So do t] property men, the camer men and the electrician the rehearsal is done to director’s satisfaction ignals an assistant direct who blows a sharp blast a whistle. Everything w spell, signalizing the end the scene, The director t Interior of the New Soundproof Studio on the M-G-M Lot; the Monitor Room Is High Up on the Wall; the Inset Shows the Monitor at the Controls - tus, and in 1925 mo- tion-picture producers were invited to consider its possibilitie . All passed the > 1 , Bell telephone appar. opportunity except the late Sam L. Wat ner, of Warner Brothers. He visioned the future of sound in films and, unable to obtain the exclusive use of the phono- graph-disk method, obtained a license and talks through a hand telephone to the oj the exclusive use of the name Vitaphone. erator, who photographed the scene fr Fox followed with Movietone, the film- inside the movable booth, and finds o1 band process. Its development, however, whether a retake is required or the sho dates back nineteen years, when Theodore were all right. It is here that the monit Case, a Yale student, began experiments operator or mixer, a new figure in the fil which led to its development. Needing world, has his place. He has heard tl money to carry on his work, he obtained voices of the players through a speake a million from the Fox movies, and now just as they will register on the screen the Fox-Case corporation controls a veri- He is an expert on voice culture. He tell table gold mine the director, for instance: How is a talking movie made? “Miss Jones’ voice was a bit shaky, and Activity inside the stage is well-ordered. Mr. Smith’s ‘humph’ wasn’t very emphatic

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POPULAR MECHANICS 943 Miss Madge Bellamy Impersonates Sir Harry Lauder for the Movietone; Hand Cranking Is Eliminated and the Camera Is Driven at Constant Speed

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o44 POPULAR MECHANICS ing at | triuri9 nanning noder ¢t} a twig snapping undet the camera staft; al tl ll these or anv one ot them, may ruina scene. The microphone knows no distinction between a $5,000-a- week voice and the bark of a mongrel dog, Cost is indeed a decisive factor 11 the talkies. There is not only the terrific item of installing stages and equipment in stu- dios, but the wiring of theaters as well. Variety, the theatrical magazine, estimates that one-third of a billion dollars will be invested by motion-picture companies in these two divisions Of this amount, $200,000.000 will go into the wiring of playhouses and $100,000,000 into studio installation, it is reported. t rtw s if two n de by One -¢ vorkit advat the p trac i of t es The Soundproof Camera Booth; an Actress Making a Record tor a Voice Test, and Panel in a Movietone Bottom, Studio the Mixing

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POPULAR MECHANICS 945 ien this is done, a of separate photo- ric cells are used, focused on one of varallel tracks. In luction, the output sound track can mplified separately plaved separately in ud speaker, so that olume can be regu- In this way, if the s are too loud, they be toned down, and é me other part of the estra is too weak, it he amplified, it problem of regu- sounds is one of biggest facing the 1eés Whistles or high noises are never rduced well by the +] rophone, Violins and aaa : 7 fae f¢ Plewatin , . - inal can af neem am have to be kept at Electric Hoist for wae ae Se ae _ to Docking Space on tance. The sound of king glass is enough to rein a record. ELECTRIC ELEVATOR FOR BOATS earums are fairly easy to reproduce SIMPLIFIES STORING bassdrums have to be mounted o es to prevent their vibrations being One of the chiet objections to ple e n up by the building. boating, the taking out and storing oi human element offers as great dif craft, has been solved by an | ) es for directors. scenario writers and club with a lift constructed ul have to learn a new technique nary freight elevator A sm ( RAIN TO CONTROL WHEAT SMUT * “#Pabie o! SAVES FARMERS MILLION GEAR-SHIFT INDICATOR AIDS BEGINNERS IN DRIVING \ Yeal "19 ] oe . . . _— 1 isvlvania farmers whose crops have depleted by the ravages of wheat have been saved over $1,000,000 les enjoving financial increases due to x tha er vields, as a result of the smut-con- ws the position train operated by the Pennsylvania which t eal e college and the Reading railway svs- ve : uld be he train carries a treatment plant ee t the cleansing of seed wheat and makes : lto the b stop a day at stations designated by |@ ginner in learning previously announced schedule. Farmers “a to drive rhe de ' o do not have access to other treat- ; vice consists of a J ent plants, bring their wheat to the train, : , slotted indicator ere it is handled and returned to them | nounted several - he rate of 100 bushels an hour. About ' inches rove the = only direct expense required of the | —— floor ona support ver is the purchase of a chemical dust ing bracket. The slots are the propei which the wheat is treated. length for the gear in any position.

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Miniature Grain Elevator Used t Demonstrate Dust rete Storage Bins ar Done Enormous YASOLINE being so high in price, why I, it ch e the itomobile engine with corn flour As fue it costs onl ibout one-thir l as much, Already the thing is bei done At Ag. lington, across the Potor c from Wash ington, ome remarkable experiment have been made in that line feeding i mixture Of corn hour da to the « vine i d thereb vith the electric park producing a series of explosions Phe idea wv evolved in a rather curious way. For several years past, government scientists have been trving to find out all there was to know about the dust explo- S101 which wreck so mat flour mills grain elevators and factorie For experimental purposes they had built toy-size models of such structures, bl the ignition and had produced explosion bv owing flour or grain dust into them 946 Explosions : Damage S ich Blasts Have Wrecked Giganti Their Cause Was Cor 3efore Learned usuall being furnished by placed inside. a lighted Cal A newly constructed model of tl represents in miniature a first-class 1 ern grain elevator, and an impro method of setting off the dust inside « to ignite is it with an electric spark little elevator has a tower at one end, at the top A pape! fastened tightly over the top, and the « plosion bursts piece of strong it outward, with a Ik report and a cloud of smoke. Until quite recently it w that dust of any k taneously. pretty not imag as nd could € xplode Spi Even after the fact well established, mill owner others who had suffered from disastré accidents of the kind refused to believe The most important usefulness of the e perimental models has been to vincing demonstration to the incredulou had bee give Col

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>) RunAu will presently be seen how tis the bearing of this phe- enon upon the operation of iutomobile engine by explo- of corn flour mixed with for this is, under suitable cir- tances, an explosive, com- ble in power to dynamite. i housewife were to go into itchen with a few pounds of flour, and scatter the stuff rowing handfuls of it into iir, she would only have to a match in order to blow he house. nder such conditions, the flour being suspended in a il of finely divided particles, individual one of the latter rect contact with the oxy- } of the air, a flame spreads the whole cloud so in- | neously that ina momenta olume of gas is generated, ver ot its expansion so - to burst the walls. e housewife of today keeps ro ig el Pal t ‘ hel co a \ iriety ™ Sl : , % i thit which, though they Ri —— to be the most innocent Running an Automobile Engine on Corn Flour, a Simple Den hie are capable « f acting stration of the Energy Contained in Vegetable Matter explosives. Not even TNT car Every now and then a cand tor , ore destructive than ordinary wheat blown up; tor powdered sugai gh t the latter be set afloat in quantity explosive even more dangerous than any e air of a room and ignited. Rice of those mentioned above. In a Boston I under like circumstances, is equally candy shop several girls were engaged in verous coating marshmallow th he . e same is true of oatmeal. Oneofthe air of the room was full of it. One girl t trightful explosions was that of the lit a cigaret, and instantly there wa a er oatmeal mill in Chicago, five years frightful explosion The building was mae o. Equally harmless, on the pantry blown up elf, is starch powder. Yet it may act What more harmless than a cake of e¢ a high explosive. Not very long ago, soap? To make it burn, one would have al Pekin, Ill, a starch-powder factory to put it into the furnace. But the soap v S up, with a loss of manv lives Five powder used by every hou ewite 1 capa ; en in box cars, thirty feet away from one ble of as tremendous destructivene as € the buildings, disappeared entirely, anv high explosive known. For Dp tat, és tle nothing was left of the cars but and therefore combustible: and, if dry and su linters, distributed through the air of a room, the

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POPULAR MECHANICS Any combustible substance 1n pov form, if so mixed with air a “| with plenty ot oxygen, Wii in a confined pace, explode ll a match is lighted. There have been a disastrous explosion of hard- rubber dust and of fish meal. The method of using the elec- tric spark to produce explosions in a miniature grain elevator sug gested the experiment, at Arling oy eee ton, of utilizing a mixture of corn Sheet-Metal Box Used to Mix the C Flour and Air Form an Explosive Prod and the Auto Engine, with Head Rem Showing, at Right, the Pipe through WI! the Mixture Is Sucked meta box ] C or t n pu ] | 1 1 | in ele 6 3 ! e ‘ | |} From é 1 stre ot flou ide1 d by suct throu pipe ) he ute 1) le engine roduc 2. i erie mall « plo oO 2 1g it¢ 1 1 the electri yal Ho tre endo the 1 devel per ) he f ) Ol cere a t er t judged f1 | statement by I (*} irle ] mroe thre é men ( é é é ) flout ra Le 2 Tle or tne wtoNn ybile en- whi i t} at the conte ¢ | +] hs f i. oe f , ] ] ’ ; a vine in Ut! Wat ) a S€ries © ma ex our-poune i r ( ‘ DIOS1IO the engine ope ite Icce vith 1000 cubis teet ot ri i « ec ull t € cot flour require t , * é put aril! t ry tecl ‘ € n ‘ ‘ e belt bought in carto1 t rocet enoug! pi r t t ( tore eighing one t icon a P Rice lout wheat lout ( TD vere \ phe me t lo ugar might be used just a vell instead pontaneou combust ( lhe Pp oblem howevet! } is beet merel attracted the atte | n ot t] e che! ica Y to cle termine how lat t might be pt ict Pvineering di oO! the expert ot cable to run an et e by dust explosion are greatly puzzled b And no wonde and the idea immediate view is to as inasmuch as it relates to the irting ¢ ro , ~— S- oo : ' certain the practicability and cheapness fires by water . ‘ . , c aft re of thi method for application to station As a con equence of the recent to , } } . ° : f ’ na \f ~h 191 ary engines, rather than to those of motor in Vermont an Viassachusett ma car barns were burned, Masses of stored ha , ‘ : Che method adopted Is tO MIX a quan wetted bv the water. underwent a ferme! tation that was productive of a heat tity of corn flour with air in a large sheet-

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ora POPULAR MECHANICS 949 as to start fires. the urrounded by flood n while barns ‘rtoa depth of sev- in- stored feet, in some ces, the hay e took fire. one farm near Mid- eX, Vt., located in a row valley where the | waters rose excep- high, there was rn that held about tons of meadow hay iltalia, {] od morning, The crest of arrived early Nov. 4. Mon- odor was ] “ 17 the tolowing i. charred ced: some hours | the barn burst A Farm Silo near taneous C into and was. burned, e flood waters in Vermont and Massa- etts reached the havmows of hundreds excessive heating set in almost ite Lite the 1 od r¢ ( led en e] the farm buildin: In many ) ot i teamed ) armin il 1eT | ed » re ove the open A la e ni bet Ot tucte ersity of Vermont, at Burling FIRE FIGHTERS TO GET COFFEE FROM SERVICE CAR \ set e « manned by a crew of five ‘n will serve hot coffee and sand é ind render first aid to Pasadena ffee-Service Car and Crew of Relatives Who Provide Hot Drinks and Food for Fire Fighters ombustion Igniting Middlesex, Vermont, Blown to Pieces as a Result of Spon- the Gases during Fermentation on. volunteered to help pitch the hot hav out of the barns my — ] ‘ Lilie ¢ el 1-enyvimeet (11\ on . i loss TO! ¢ pla itio I e \ ) ‘6 1 1 i Do eou combust t wo ‘cou +: \ ; ‘ ent ome chem iC mn ened 1 i WADI r¢ eT y ) 1 reno to i fi emen, The cat a eer ent l, é é \ ) ; ie) i OT ¢ et ther fe) | ' 1 it ico en o1 ee] 5 r md ¢ t , , , in e ho yle. « net it plate 1 ( gr é "apie 1 1 oO pple ada hve 0 on conee irn room to 1crew ot tout ymen, beside i fiith at 1 1 r e€ \ thirty ral mm tank of fresl watel ( ried on the root One compartment is é. : equipped with a complete irst-aid kit and most of the women of the organi zation, who take turns in lunteering tor duty at fires, have taken first-aid courses, so to be able to attend injuries

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950 POPULAR MECHANICS

oatiada rs ve P

With His Boat Full of Water, This Oarsman Can Still Row Ashore, For th Carries Enough Air to Keep the Craft from Going to the B LIFE RING FOR BOATS SAVES _duite different from those found o1 THEM FROM SINKING native prairie, Insects frequentin; D € land ¢ ¢ € le 1¢ ( A rubber life ring like 1 ereatly el other ide of the fence larged inner tube, is the latest safety de vice {for the ré who t The ring can he e - " 7 ~+ alagegctadP yee i can © OIL YIELDS FLAVOR OF PEACHES oWN uN and attacned around the outside AND KIND OF SOAP be filled with water and still rowed ashore. Soap and an extract ; , , , ot the boat. tollowing whi the cratit can I an both be prepared tro} petrote WIRE FENCE BAR TO INSECTS = <emists report. Hey co not aaticip PLANT STUDY SHOWS ee ee ae oe ee ee present chief use as a source of tue ( How a barbed-wire fence ac ndirectly the experiments are considered espec as a barrier against grasshoppers and other important as showing a way to obt insect al we is against cattle vas one substitute for various vegetable acid ( he intere ing observatior made by other materials that might be utilize Prof \. O. Weese of the University of food instead of for making soap. Othe Oklahoma. Studying buffalo pastures in teresting facts were brought out at a re the Wichita national forest, he found that cent meeting of the Society of Chem the associations of insects were as distinct Industrv—coal burns slowly all the time on the two sides of the fence as were the even when it is stored in the basement associations of plant The reason was but the reaction is so slight as to be u the difference in the plant life. Where important, and also that, by using a animals had been permitted to graze film of color in lacquer, it is possible t there appeared grasses and other growths protect auto finishes from sunburn,

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POPULAR MECHANICS 951 BIRDS SO STUPID THEY ARE CAUGHT IN FISH NETS lore than 100,000 little auks, birds so pid they cannot tell the difference be een a man standing still and a pile of es, were observed on Hakluyt island the Arctic ocean by Dr. R. M. Ander- Canadian government zoologist, on expedition into the far north last sum- Taking advantage of the birds’ stu- lity, the natives catch them by sweeping em up in the ordinary landing nets used fishermen, The little auks stand up- ht, resembling the penguin, and, like ir larger relative, form in lines of al- st martial array. Dr. Anderson trapped » lemming voles, a rodent so rare that ly a dozen specimens are known, and nd four white-footed fieldmice near t Burwell, on Hudson strait, in a land ere it would seem almost impossible them to find food to exist. He also hed the Eskimos capture white whales eating on pans in the mouth of a little » frightening the whales they floun ed around until the tide went out and hem stranded NEW SOLAR-HEAT MACHINE GETS FIRE FROM SUN new solar-heat machine is being tried e search of science for cheapet tuel ces than coal. The mirrors tocus un’s rays in one spot, concentrating heat in a small area, and giving a much eater effect than a burning glass. Solar-Heat Machine Which Collects the Sun’s Rays over a Large Area and Concentrates Heat in One Spot ie ahs . This Stately Clock Tower, Built as-a War Memorial Is Really the Chimney of a Heating Plant CHIMNEY USED AS CLOCK TOWER AND WAR MEMORIAL 1 1 Using the chimney ot a heating plan pus instead of an unsightly obstruction, 1 the unique result achieved at the Univer sity of Detroit. A tall square tower is a four-faced clock hides stack of the new university power plant MILK CAN BE SOLD BY YARD IN NEW SHEET FORM Milk may be sold by the square foot o1 the lineal vard if dairymen adopt a new process invented by a Copenhagen, Den mark, milk producer. His machine rolls dried milk into sheets like tissue paper, and in this form it is claimed the product will keep for several years without any change in quality @A total of 7.698 miles of airways have been marked for night flying, with 1,284 electric and acetylene beacons in use.

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952 POPULAR MOTOR AIR CLEANER DRAWS SUPPLY INSIDE CAR Carburetor Air Intake Which Draws Clean Supply from the Inside of the Automobile A motor air cleaner that draws the air supply for the carburetor from within the car, where the air is practically free from the dirt sucked into the engine compart ment through the radiator, is the latest ac cessory for the automobile. The cleaner is attached to the dash. and has a remova ble filter. \ flexible connection lead down to a horizontal passage to the carbu- A trapdoor normalh kept the engine retor intake closed bv uction, blow open in event of a back fire. TEST SHOWS FAMOUS BRIDGE STRONG AS NEW Recent examination of the fiftv-four- vear-old Ead bridge acro the Mi - sippi river, at St Lou hows the famous structure to be in a ound condition as 1902, twenty- The bridge it was the first when it was last inspected, in eight years after it was built. 1 noted not only because in America in which steel was used for main members, but because its huge 520- foot arches carry a double line of railway on one deck and a highway and interurban total quired special materials track on another. a load that re- Che main mem*= bers of the arches are eighteen inches in diameter and are unusual in that they are MECHANICS made of six staves of chromium steel tw and an eiglyth inches thick, fitted togethe like the staves of a barrel inside a sheat of quarter-inch steel boiler plate, rivets around them. The result is a hollow tubs of thirteen and a quarter inches’ inside diameter and eighteen inches’ outsicd made up of six segments. In the recent examination, inch holes were drilled int: these tubes to see whether water and rust had penetrated inside, but they were found to be perfectly dry. Capt. James B. Ead who designed the bridge, was a versatile engineer, who achieved success in gla manufacture and gunboat building, an later in life supervised the flood-contro He had tk surmount almost unconquerable obstacle to get the special steel for his bridge work on the lower Mississippi. RAZOR-BLADE STROPPER USES TWO STEEL BALLS Knife sharpeners which utilize the prin- ciple of drawing the blade between tw hard-steel surfaces are more or less com mon, but now one manufacturer ha brought out a razor stropper employin steel ball are so that they the same principle lwo mounted in a handle revolve their inner + ers s ] contact. Either an old- easily in cups surface are in tvle blade Razor-Blade Sharpener Uses Two Steel Balls to Strop Either Safety Blades or Old-Stylie Razors or a safety-razor blade can be drawn bacl and forth between them to strop its cut ting edge. Because of their shape, the balls are especially adapted to stropping hollow-ground blades.

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POPULAR MECHANICS 953 bies in a Hebrew Home in New York Entertain Themselves in This Spring-Operated Chair, Which Bounces Up and Down and Hops over the Floor at the Slightest Movement of the Occupant SPRING-OPERATED SEESAW paris After the material had set, the AMUSES THE BABY clusters of grain could be moved around at will The job cost $3,000, beside vhat eesaw for one person, operated by was paid the farmer for the use of hi ng. is the latest device for amusing grain and fields. but when it wa lone. the 11 the Hebrew intant asvlum 11 eve could not tel] where the growit erain Y orl One end of the balanced eft off and the transplanted stall bevat nich carrie a seat and tray tor ld hel ow? ' spring rhe dh Bs held down by a spring. Ih€ AUTOMATIC PANCAKE MACHINE sakes te akties ie al hea dead COOKS AND TURNS THEM ng about in hops over the floor An automatic pancake machine that measure out the batter, cool the ke MOVIES MOVE WHEAT FIELD tang $s cngg eer remnctet Goal ge 5, genial TO GET PICTURE EFFECT ee man Impre opera ( ¢ to! in the eastern Oregon cylinder containing the yatter, reg country recently, a movie director by its pressure, the quantity to be rel ered his script called for a miserly for each cake. The b ho utilized —_— oO é 1ilable | r r el ot ine bv t One il! up ( { e p ery walls of ( ¢ ¢ No such oO H rorgrain field iro. r the cake he found. so errs wt ime necessary { Cc ove two acre r¢ ¢ eat to |! n po m ¢ vacant space dt nn! otor 1 technical de- | the ‘ 1, ent solved the | | cooke the |] t ha blem by mount oO ‘ lutio cluster S of “ee ee when a gate slide eat in plaster of a Pancake Machine; Batter Container at the it off the plate. ght, and the Cake-Turning Arm at the Left

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ke MOBS TERY story as versatile pen of Jules Verne, fanciful French romancer who avo delighted the voutl Knowledge of the tide nowiedve oft the cle ot all the vessels in everv ocean port in everal decades of the world s affects the safety the world: it enables the deep-sea fisher- man to plan his expeditions most profita- bly, the dock enginee1 level at to determine the which breakwaters and piers should be built, as well as how to salvage and lay large pipe lines: the expert on sewage disposal to know just how far out to deposit a city’s sewage without endan- gering the health of thousands of people. Why is a tide and what is it? The ex- planation starts with the fact that it is the periodical rise and fall of the ocean waters caused bv the peculiar attraction of the moon and the sun on the earth's 954 Seas. More specific the cause is the differ between the pulls on center of the earth on the near and far When you playi grasp a small child the hands and swing around in a circle. cannot stand erect pivot on a single heel stead vou lean back, and tinv step very small circle in o1 take to maintain vour bal The small youl circle feet follow rt sents the tidal pull au the di ig ol the wei the whirling youngst his larger orbit Phe uation t ] h- ] steel natt, evera connectil | 7 41 around it, the earth must back off speak, in a little circle (or ellipse) « own, Theoretically, every star and planet the universe raises its separate tide i: oceans. Actually, however, even Ju; the greatest of our sister planets, is that its in be detected. To all inte: said that respectively our ne most away and relatively so small, ence cannot therefore, it may be only moon and the sun, est and in space, our powerful neigh| have a share in making earth’s tides. The evolution of maritime traffic fro the shallow-draft earlier generation to the vessels of great fleets speedy deep-draft steamers of today | sailing needs of the making imperative the utilization of i1 revolutionized the marine

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( rte U'. S. Coast and Geodetic Survey Reedy Island Pier and Tidal Indicator in Delaware Bay, as It Appears by Moonlight; Tidal Fluctuations Are in the Main, Accurately Charted but Occasionally the Predictions Are Wrong ved instruments whose simultane- light-draft cnowledge of tidal condi- vas of slight importance, but as the ft approached the depth of the water er bars and into harbors, such knowl- e has become almost indispensable in e navigation of a modern and proceeded n ethods elopment has ly In the ady ance early davs of 1 r i vessel upon ving and entering port. Kach of the leading nations issues tide now cover the entire mari- would be im- cticable to predict the times of the ? These e world. Of course, it ¢ for each one ot tl e eighty -eight prin- ports of the world. A t main ones number of therefore, having represen- t selected Daily pre- lictions are made for these, and all other ive types of tides, have been tandard reference ports. calities are referred to them, allowing course, for differences of time. For in- tance, the tides at Poughkeepsie, N. Y., me four hours forty-five minutes later in the daily predictions for the tides off New York City. These predictions are issued a year in booklet form for the dvance. in handy tidal secondary mariner. The booklet also contait information. for some 3,500 ports, which, in connection with the daily predictions for the principal ports, gives the navigator all the necessary tidal data part of the world The contains over a mii for any publica tion each must be absolutely insure the safety of life and property The U S. coast and geodetic survey maintains what are known as primary tide stations at the main citie alot all our coasts W orl ing trom the ¢ base the engineers make survevs from time to time so as to kee] absolutely up to date the chart which guides the marinet Such surveys involve many soundin ordet to make an accurate profile of the bottom and indicate on the chart a visualization of the bars, channel nd shoals over the charted area, so that the mariner may readily avoid dangerous points. Among the remarkable instruments used by the survey engineers, are the automatic tide gauge and the _ tide-predicting ma- } th it moves a sheet of paper forward automati- callv, and a float that rests on chine. The first consists of a clocl the water 955

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956 POPULAR MECHANICS

[ = icing | ] and constructed by government scient back in 1910 and has been in conti:

| use ever since. | he prophet’s operation is nothing of marvelous, [It was designed to ca y the effect of tl h 1 | late simultaneous seven factors whic eo to make up tide, a feat that would require the ser of trom fifty to 100 expert mathemat and the computation of more than a lion figures. The factors depend on relative position

the sun, moon earth, and al the shape and of the harbor

which predict

are made. |] nd 1 ¢ and f | greatest error ith the tide. This been only six o loat causes a pencil hundredths foot » move u ind he machine down the paper so foretell the tide hat the combined hundred year motiol of the pa- advance aS @a r¢ due to the ( ck | t | those ¢ movement, and the | rth ¢ rencil, due to the ind mS tuation oft the prop J é loat, automaticall of slack water Pp rmaRBCce a2 cI - , . : , é ot e ft ¢ t | net " de ‘ f H 1 l be obta +} nsome gauges,the ‘' 4 i n others, a second « + <4 on the curve at ' ? { Phe float 1S ne ed 1a ) ertical ee cvlinder, or well, that ter-tight ex " cept to i mall open the hotto } ] § - ( ing the water to ris¢ ind fall un n iE - the slow tidal : ' in orde » : to imsure accurac ( thie 1uge record / it all times, it is compared daily with read ‘ ngs taken direct] 4 taff placed ' \ ear the rauge ine I a board w th | = graduated markings showing the height i ~ “ of the tide. om, Most of us have heard of the tide-pre i \ licting machine, described as a “mechan te lll “ il prophet with brains of brass.” The oeeememee device, weighing about 2,500 pounds, ji - ome eleven feet long, two feet wide and Tidal Gauge at Anchorage, Alaska, at High and L Water, Difference Thirty-Three Feet, and, Cent feet hio VAS CONCeive clones x Teet high. It was conce ved, de ag nie Close-Up of the Moon, Which Causes Tides

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POPULAR MECHANICS 957 currents and the velocities and gths of these currents. Already a ng practical instance of its value in connection has taken place. Even be- the recent deepening of the Chesa- e and Delaware canal, the automatic et predicted what the times of slack er would be in the canai a hundred hence. ts are now being made with a new ce that promises to revolutionize the nce of tide surveying. It is a current er, not yet fully perfected, which is es ially an automatic motion-picture cam- recording current velocity and direc- beneath the ice. When im ed a little re, the device is rected to take place of a com- te observing meter are a com composed of ap : dial and revo boat. one of lution dial of whicl and six men motion picture as the added antage of op- are taken eacl half hour, thereb h ting continu- ‘onstituting a per lv for a week manent record of hout attention “urrent movement vorks as fol- Many peopl: Inside the wonder why the sun has so littl tidal effect on the earth. It would take more that 26000000 moot to make a ma heavy a the ul he c our ae el e 10.000 p P One a uppose, then, that the sun would exe a corresponding! reater attraction « our elobe tl il doe if far tinier net hho And sO It does. sut there } i vast differ ence betweet the total pull ota hody « another and its tide oduc force \ was mentioned earlier. the tide o1 earth results from the difference betwee the pulls on the center of the earth ar those on the near and far side Whv do we have the greatest tide U. 8. C t and Geodetic Survey the full moonr Because whereas ord OX Tide Gauge at Lynnhaven, Va.; Dr. Ralph E Wilson, of the Carnegie Institution, with Device Illus : trating Tides, and Workmen Erecting Gauge different directions, they now are pulling narily the moon and sun are pulling u

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POPULAR e i w St ge and Afloat at Hi t ether, in the ( ¢ On the other ind ¢ e the 1 ( range of tide a e first and last quarters because then the moon and sun are pulling at right an- rles to each other, each force tending to teal; } att +3 F neutralize the attraction ot the other body. It is interesting to note the wide range of differences betweet thre average tidal heights at certain of our « istern seaport cities Eastport, \e P has the highest tide, normally about twenty ton, Tex., has the est, about one foot. New York City has and one-half feet at high tide whereas there teet, while Galves- iowest is scarcely any 1:6 ditterence betwee t I il waters at San rancisco and Los Angeles, the former Showing a Ship on Dry Land at MECHANICS having three and | tenths feet, and the lat three and eight-te: Che highest tide i; world is about fifty at Minas Fundy, Basin, Ba The lowest ti in the Med ranean and at the Vir lands, occur averaging ¢ monly less than a foot to belief, especially that ished by men, tides exert Contrary popu 1 chet! many ( ence w vhatsoever on weather, according to U.S. weather bureau a matter of fact close have disco ervers ? t extreme weat conditions affect the t ebb and flow point on the coast at ¢€ to some decree. i | | | -] ~L-1 . : \’ | clocklike regularity. N: } ertheless, the wea continues to be fair Oo! the | tides On the ot] er | o! | foul, regardless extret conditions low barometric pre aad weer ateei | from favorable direct | may cause either unu | ally low or unu ———«—« «« high tides as the G s happen to be Dake somewhat. fantastic tance: [f it earth the Isthmus of Panama, an intere ing whether not t waters of the Pacific would start flow into the Atlantic. The answer is that t would do so during high water. At i water the current would be reversed flo ing from the Atlantic into the Pacific As a matter of fact, the today of ocean waters at the Pacific end the were possible to eliminate from t speculation is or 1 } average heis Panama canal is about of a foot higher than the average heig at the Atlantic terminal settled This point act ally has been beyond all questi by the precise leveling operations of tl the diffe: canal engineers. The cause of no inf three-fourt!

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POPULAR in tidal height at the two extremities ought to lie in meteorological condi- principal among them the direction revailing winds. ow and then we hear mention of land Just what they are is explained thus W. D. Lambert, eminent mathemati- of the coast and geodetic survey: e materials of the earth’s surface are tic. They can be disturbed by natural es, but they will tend to go back to r original shape when the forces acting The e forces of the moon and sun which e the tides of the oceans cause the of the land. 3ut the latter are iller because land tides are due to the tortion of the earth rather than to the ee-moving water along its surface. The kimum tide of the solid th is not greater than one foot, and ab- utely imperceptible to any of us. But e tides of the oceans would be slightly them have ceased or changed. distortion or er or lower if the earth’s surface were igid as not to have land tides. In other rds, the moves upward just as ves the water, but the difference between land e extent of the two movements is what e call the water tide. of the land tides itself serves to indicate that The smallness is ct that earth is virtually solid down to a depth 1 it least one-half of its total radius a in and even be‘solid clear through its center.” BOAT AND BOOTS COMBINED FOR THE HUNTER \ combination of rubber boots and boat li The legs to he latest aid for the hunter. e watetl tight secured compartments MECHANICS 959 ELECTRIC COMB AND FUR IRON RENOVATES OLD COATS Renovating Fur with the Combination Electric Comb; Heat Kills Moth and Iron Larva A combination of heated iron and comb the wearer by straps. eat in the com irtment which the Inter occupies en bles him to rest hile in deep water, nd he can propel craft either by kicking his feet or ea paddle. Light- eight plates at- tached to the feet { the boots protect lor renovating tur coats takes the place of the old-style flatiro: and, it is claimed, does a better job 1 le time Shaped like a large dagget weighing ixteen ounces instead of the several pounds weight of an ordi1 on, the device is ight. and eas to use It i 1¢ \ itha — — torward and back rd l 10 never r¢ pe tted fromthe except to turn use the comb to rooth out tangles ea iid to kill all moth larva | g Phe life of an air- plane may exceed that of an automo bile; one plane flew em when the user walking, Rubber Boots and Boat Hunter, Who Can Propel Himself by Kicking 225.000 miles be in One Unit for the Duck . tween 1920 and 1928.

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960 POPULAR MECHANICS storage batteries, two electric motors, and belts. s] and pulleys constitute | system of working mechanism OUNCE OF METAL SAVES PHONE MILLIONS How slightly m than half an ounce comparatively rare met is earning more than $) QOO.000 a vear, is one the romances of the te phone industry. T! metal is barium, whicl used as a mixture to co the filaments of repe tubes, important unit long-distance and ot! phone svstems, to prt serve the volume clarity of the sounds. particular service i ereatly increase the nui at a given tempera 1 . ' thus improving the tule h at a London ROBOT THAT MOVES AND TALKS OPENS EXPOSITION “Eric,” a mat f tit ] moves and tall tood up, when asked to. on a plat- form in recently and formally leclared open the annua the Model lengit €er society. Looking like a suit of ancient armor borrowed from the London Tower, the mechanical man. in response to the invitation to address the audience, made a whirring noise and slowly arose until he stood more than six He bowed stiffly from the waist: fire, furnished by concealed electric lamps, flashed from his eyes; a spark jumped across his teeth, and, turning his head trom side to side, Eric began his speech loud from a small the robot's speaker throat via wirele The words reached broadcasting plant off stage. Twelve-volt “Eric,” the Me hanical Man Who Delivered Exposition exhibition of efficiency. A bariut coated filament requ ee le than one-tenth of po Ss co ul ed by Or tu ten, efecti ig of $120 for the lite of each tul ich is approximately 10,000 hours the process of manufacture, a mixture ] “ ¢ +} > , re } barium and strontium oxides is prepare as a paste with paraffin. It is then appl + to the platinum filament base, and t paraffin is later burned off, leaving tl oxides clinging to the filament. Bariu is not classed among the precious metal but since it performs such a great servi in such small quantities, its working vaiu and even dust b reduces that of other metals the precious iewels—to that of comparison. @ Popular Mechanics Magazine does n publish the name of the maker or seller 01 any device described in its pages, bu this information is kept on file and wil be furnished, free, by addressing our Bu reau of Information.

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POPULAR MECHANICS 961

DENTAL PROBES er Se ter Sra NRAPPED BY 4 MOTOR anitary way to cotton around the hes, the sharp- instruments used inse and medicate in the teeth, has developed by a Chi- dentist. As a sub- for the fingers, he levised a motor to » the tools, thus pre- ¢ dirt and germs

the hands and fin- RR acaemmmanemennE nat Sketch to Show How School Buildings and Shops from Old Street-Railway tT = i cr ; 2 Ti- OM <Oaning (2 <0 Cars Will Appear When Completed ith the material en- the patient’s mouth, The cotton ts SHOP FROM OLD RAILWAY CARS ind evenly and in any quantity desired, TO AID SCHOOL BOYS he operation takes but a few seconds. | motor is placed on a pedestal or with- Four abandoned street cars are to be cabinet, and the outfit includes units converted into a machine shop and indus roughly sterilizing both the cotton trial school for bovs by the Kiwanis club the broaches. of Cincinnati, as a tribute to one of their members. The cars are to be grouped in SIDECAR BICYCLE FORCHILDREN ..ncte haces and will have woodwork. ADDS TO OUTDOOR FUN i sieilliie sfheses ~] . laling < 1 electric lachine, Clav-modeing arn eleciri¢ the form of a Maltese cross, mounted on terned after a motorcycle, a child’s Shops as well as a room in which general le, recently patented, has a sidecar ‘"5truction ts to be given, extra passenger. Rubber tires in- = _ comfort, and the unit is designed to NEW ALLOY-STEEL TOOLS NEAR leven more healthful exercise for the DIAMOND IN HARDNESS tor, as well as’to increase the chil- . ; An allov steel manufactured by the Krupp works, at Essen, and now being marketed in this country for use.in tools and tool bits, is claimed to be only shehtly nferior to the diamond in hardness, far surpassing usual tool steels. The material does not require heat treatment, and, as it has no temper to lose, can he ope! ited even when 1e cutt Y edge has reac] ed a bright red heat. lips of the new metal can he hi ized to carbon tool steel. but not to high-speed steel.. Comparative cutting tests are claimed to indicate it is 200 per cent better than | eh-speed steel in cut ting hard cast iron and 600 per cent better in cutting sott castings: SOO per cent het ter in cuttl 4 brass a d 500 per cent M ; | better in cutting hard rubber and similat

materials To maintain the necessary , sharp e lee special erit ding wheels are for the Rider and Tiny Passenger on Child’s Bicy- oft Kine wucidis weal Cilaty uted cle That Has Sidecar Attached used Tor rougil a Hnisi grindime,

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/ EXTERNAL SURFACES /OF CEREBRAL HEMISPHERE a a el INTERNAL SURFACE OF CEREBRAL HEM. OF OBJECT, -RETINA-PICTURE RETINA ) 5 ta 23 i SECTION OF EYE ke CRYSTALLINE LENS = z OBJECT | IVING in a world that is revealed to us lat gely by our eyes, ears, fingers, tongues and noses: traveling over coun- trv that is well marked with roads. traffic signs or places to ask the way, we mere human beings have difficu n approach ing the problem that every bird, animal or hish must tace and olve in o1 let tO ex! Psychologists and en ke have re ized that animals often differ from human heings in their keenne . pds nee neil stints eIngs in eir Keenness OT senses and € development of instincts. A faint Will sensitize the nose oft a dog: the eve e 1 7 , ‘ of many birds is more observant than the Keen sight of a marksman, \ le a Wild init tart l e e « e of a di tant lea But t e * | ry e é en enou htoe 1 to the ¢« ré Tactio of 1 in tude oO e ¢ { the ) eT oO animal behavior and accomplishment. What guides the migrating bird on its spring journev northward: How does the salmon with unerring accuracy find its wav up branching rivers to the scene , af ~1 1/11 ] ] } } ; of its childhood How does the banished ln Goel . - trance _ ae Cal iV OVE dallve te rain io the home of its maste1 lo ex- ce a meg. -* Pm - . ¢ . / eretnns ? e 7 . . + J s : . ’ + ‘ PY “eh 4 ’ P) « . ' ’ ¢ *. ' . * ' . X. ot . . 4'$e *seee? 1 : ‘ * % . . _ -* s *ecee.e?* ‘ *. . ‘ * 7: “®enceces® Diagram of the Ey e and Brain Course Follewed by a Blindfolded Ma an } in a Straight Line to a Distant mysteries lain these cientists ar ealms bevond search for Che occult for this pl ¢ ne se n nN tempted the ordi vy sense nse 1s

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NNIINSEH!

il. Experimenters fee I ‘ , , t thei esearches { e ne\ sense 18s as , , tan eas sight, hearing tasting and _ feeling + ; ¢e])] } t ; ¢ ] ( ests Tell lal 1 init perates., : - : ] ense of directio1 the tic sense, the the orientation sense— - 4 oa 1 — ° at e some ot the terms that have beet! owledgve ¢ i 1 Ze ) é to irt to this po sible addit on to the t the begit O Fall 1 le I t € sory equipnit ot the i - 2 1¢ é vite é 1 ’ ( ( é . Ke | tTtoc 1 t t 1 ’ ’ , 1 P bor tore ot Columbia I niver- 17 u os ' the e ¢ ‘ ’ 1 1 - 1 , , r ,ork City the search tor the to the rodent 1 ’ ' 7 eis now be gy most active pi 7 ou eem to su ) the f Dr. Frederick Tilney is the « a ie a Ae aa d timulator ot the research \ - rou lup i ip t 1 1 , 1 experiments are difficult and at bly throug tarracts , net ' + + 1 > ] P esu neonclusive 1 11291 ime f ce t after the « need i ¢ 1O1¢ ProyTyedc jus vpe2zuUuli, C i al ) ¢ i c eresting result has emerged es those com ecog ’ 1 - ’ ’ 1 ’ 1 ‘ or mice are used on account ol! sessed 11 g ¢ ee cert er , ’ - + 21 , ’ ellgence ind a itv to find tnett e are to explain and ut erstal tne re ut ! p 1Z2 ne surrouyl li os | e ? il é ¢ ¢ + + é + ‘ P , 1 ; 1 4.1 1 P : Ss have devised mazes vith bitin Oce . te t ; 3 ( ‘ . 4 ae 1 " ; ’ , enticing but false corridors t Ive i ere sal ¢ ( ; WONT \ ¢ he ¢ ] ward he tic t ‘ elt ourne 5 t@ tae rood rewa t ( é ¢ } , my . ' 4 ’ 11 ind slov This 1s a fra scale ckle oce mie ) t ] lat | 1 , ' eT to the abvrinth ot the amuse é iT oO their ne ' P 1 rl] 1 } + Y ‘ 1) ] ¢ K 1n \ cn pie isure seekers pa e Vor rote | ? ¢ | 1 ‘ me lost But the rodent uses it no bige ’ ‘ 1 it me? ry nd atte ner ] ' > Cia 1 l¢ orv a aiter a pe oO 1 ( ) ( , , ’ 1 ' > 4 Ss, ZQracdua earl e maze ina 1 ( 1 1 { do ; 1 1 ‘ ad outs da ng t rough it route , P ‘ er ft ‘ \ nt " \ ~ ' art iv if hunege TT = - to the etheact « ‘ __— Ay , tempting ( yy))T ' nal 11 1 re ‘ re 14 ‘ 1 : sus maze-running rodents D1 ents T m 4 i el igre 7 te »s daanag the ] } ] > ¢ +1 ra issociates are doing é ch « r re é r } ) 1 ° . ’ ; aTy work on determinine’ the n es trot ¢ air} ‘ \¢ @ tow ) ~91] lh, + ‘ ] ‘ what Dr, Tilney calls the “nin ng-weary a fey 1 f ‘ , 1 , my 1 = 1 1 ' — a The ) clue to the nature of e birds flv hig e P 1 1 1 ’ ense 18S thre ict that 1t the maze ee the me cote ) thre ohiect +1 1 } ! 1e rat T NOwse expert ‘ + me é S < ne ‘ ‘ SENSE? LOY

Remarkable Photograph of a Golden Eagle, the American Nationa Bird, as It Appears in Flight ]

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964 POPULAR MECHANICS point of departure unless the maintained an exact memo the length of the lines traver this or in that direction mariner, navigating by dead oning, has to write dow: length as well as the directi all his rhumb lines. Such a demands at least a constant ception and a prodigious me and does not correspond at the simplicity of the noti which I spoke above. But te: trial magnetism furnishes othe dications. If we suppose that animal is capable of perceivin fluences which actuate the ne of the-compass of inclination that the position of this animal mains always the same wit! spect to the vertical of the he will be able to recognize “Cher Ami,”’ Army Carrier Pigeon, Delivered Message from Ver- liff Tre ‘— : : t >») : , a aqdiuimerences in intensity jun Though Its Leg Had Been Shot Away eteder cause the variations in the was made before man first flew, and a few which we measure with this compas minutes of figuring upon the spherical “Finally, there are other data whic! shape of the earth will show that even the may gather from the use of our in keenest of bird eves in the clearest of ments, and which one can suppose pe weather cannot look below the earth’s tible through an appropriate organ curve to the distances covered. More have in mind variations in magnet over, some birds are known to fly at night tensity. If one disturbs the positio and in fogs with unerrsng accuracy. equilibrium of the needle of the cor Most inviting and most plausible is the theory that magnetic sensibility is the se cret of the ninth sense. The French scien tist, C. Viguier, manv vears ago main- tained that the physical force that enable animals to direct their course must be everywhere present, “in the heights of the atmosphere as well as in the depths of the sea.” Even Darwin gave attention to this idea and raised the objection that a com pass without a chart avails but little. Vig- uier replied in the following analysis of the problem: “Is this objection insur- mountable? I think not. The compass gives to our mariners a simple direction. gle that this di- rection makes with their route in order to Chey need to know the an direct themselves. It is the chart which serves this purpose; at d if one conceives of animals endowed with a sense which permits them to recognize only the dir®€c- tion of magnetic north, these animals A Noddy Tern Come Home to Its Tagged Nest : Trip over Unknown Seas would have a constant notion of north, but would not be capable of returning to their

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POPULAR MECHANICS 965 Elaborate Maze Constructed at the University of Michigan to Test the Intelligence of Rats and Mi Such Devices Are Used by Dr. Tilney in Sti ig the Ninth Sense on, the needle comes bac by pigeons oiten pa t Just t ¢ 1 1 1 ; Os atior vhich show a vari fra] c nes and the co ¢ ¢ ccording to the place B b ese 1 le electrical to » ft e can trace On Our maps a series be paralyze \ le the magnetis! Ol es. One can then admit that a line — earth is affecte letermined for an animal, endowed Some of the 1 t intere e magnetic sense as complete a rorming experiments upon the « re assuming it to be, by the value of ense in bi ere performed by D1 netic actions in inclination and Watson. Upon the D just as fairly as it would be off the sout! ed for us bv the intersection oft and sooty tern ignetic lines, These magnetic to these islands from the thi ¢ once known, the animal will be These islands are the most 1 n breed i Ss ot voinge di ectly to t . ne ) ‘ oO ‘ . . T Carrv it to considerable distances, kno { to describe comolicated circles. one of a serie r te . even during transport, it will be tured twelve so r -ome back t 7 : - See me as ‘ 1 _— See Ss to come mack to 1ts point ot aecorated ¢ c ( t re Thi ense j Wht “l to vive (A ditrieeatsncs ¢ al — | Is sense is supposed to give is i¢ ca mal general direction. It will suf- lip to Galveston ex., a thou git into a neighborhood where = of unbroken water a e senses can be emploved.” ! n fanciers and those who train could not see the sea. Some were releas« cing carrier pigeons have in some 100 miles awav from the islands. othet e observations that support the had to travel much farthet rteet etic theory. On davs and on routes the birds returned to thet re beset by magnetic storms the tests. at other similar flicht

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JOO POPULAR neing evidence that birds sea wholly unfamiliar t n their desired objectives. qaistance ovel them and attai Kvervone familiar with the tional five senses, sight, hearing, te and smell. To these five Dr. Tilney ls three others that ippreciated. \V ¢ havea skeletal a visceral sense, both ¢ Dr. Tilney lists what he calls the hurt or in sense, which, unlike the other guiding is protective in its function. directional, hot ing or ense, when it is authenticated. a magnetic will be the In what organ of the bod, sense is seated is at present unknown. Dr. Tilney has suggested tentatively that is associated with the retina of le 1 nth sense, the eve. suggested that it is related to the fluid of the ear in which the Older theories have earth’s magnetism may induce currents like those in a magnetic needle, Perhaps, when the ninth sense is better understood, it will be discovered to be one of the endowments of certain fortunate men and women. Aviators contend that here is a feel for flying with which some are gifted. Now that man is launched upon an aeri [ al existence by machines o! his own creation, his new environment may enable him to under- tand himself more thor oughly. GATHERING ALOES BITTEREST JOB The bitterest job in the vorld is gathering t ap of South Africa’s aloe e plants for American english medicine mai icturers. Each year 250 yns of the sap ered by native collector n the Albertinia region of Cape Province \loes comes from the plant, which rows in isolated clusters ] a es. rT! one stony hi 3] ] ~ ae Ee de é leaves are cut off ‘kle-shaped knives, and | led in a hole, dug in the ompR names nd and lined with old "* Steam Pip Plates, can fiv iong ) conven- touch, are not so easily sense and t which originate S ow 7 S| itself. As the eighth sense, da MECHANICS sacking. For hours the juice drip After they have run d eaves are removed and the con chemical poured into an old gasol YasO the leaves. 7 to be boiled down over a fire. Whe cans reach Cape Town the tin is eu ith shears and the dried product, | like glue, packed for shipment. TI lectors get $5.50 a hundred pound a single plant only yields about cents worth of aloes, the pay is very as While the ostrich-feather industry it rt s height the Boer farmers would no} low their plants to be tapped, as the lieved the ostrich feathers acquire extra sheen when the birds were allo to eat the aloe leaves. SEVEN-FOOT STEAM PIPE MADE BY ARC WELDING A steam pipe seven feet claimed to be the largest ever built been completed at the Westinghouse tory for installation in a large plant. The pipe will carry 1,60 pounds of steam per hour at a pressure forty pounds, To make it, section rolled steel were welded together. prod ing the required in dia strength without great weight and expense of a casting e, Seven Feet in Diameter, Formed by Arc Welding of St New Time and Money-Saving Method *

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POPULAR MECHANICS 967 COAST-GUARD PATROL TRACKS ICEBERGS TO LAIR Its presence was estal lished when thermome ters disclosed a tte i ence in water tempera- i tures at great dept ors P ; phe expedition LIso studied the salt content ot the northern watet Qne way ot detect icepergs 1 to measure Coast-Guard Cutter ‘“‘Marion,” Used to Break Icebergs, and, Right, Deep-Sea Sample Taker rom an exploring trip to the lair e North Atlantic icebergs, a little 125- l covery of the spot from which a ajoritv of the towering ice moun t-guard cutter recently reporte come Cown into the Atlantic stear lanes each year. The ‘nland coast in the vicinity of land have their own name for t] Eskimos « movement of the ice into the open i native word that means “cat: re is- é hen translated into English. The I elds of elac al ice break off each veda a huge basin between the island he mainland, until a tremendous! current sweeps them out through al ile channel into the sea. From the above, it looks like a vast railroad ; ; : “44 “4 ° , ires! \ te! 1 it the . £ tent ol ed with moving monsters, a1 poke ot : : , } aoc m A 1 ocean in its neig mor ‘ 1 ie inding and crashing of giants whose - bia . 1 - 1 1 “M rion a oO ca;rti ’ 1 runs into hundreds ot thousands : 1 ven stray icebergs s can be heard for miles. The cutter : n,”’ which spent six weeks between — or and Greenland studving the currents and the iceberg RED ANT ENTERED IN FIGHT epg ptsegecs. ee ice AGAINST BOLL WEEVIL manded by leut. Comm, Eadware who has been on the interna- \ new entry in the fight against th: ice patrol, established after the “Ti- cotton bo ¢ been fou K disaster, since 1920. Asa result of man county, Texas, where a species of red ea soundings and the collection of ant has been discovered tl cks the samples from far beneath the ocean's \\ eevil. and alwavs wins. ¢ om ce, the expedition discovered astream the state department o i ire ire Id water which flows up from the = studving the insect further ( er tic ocean along the bottom of the t can be generally used t e es and flows back to the southag ain, the cotton crop

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968 POPULAR MECHANICS WATER “WATCH DOGS” GUARD LOGS FOR PAPER tual Record Streams from Monitor Nozzles around Big Pile of Logs for Paper Pulp Drench Every Portion of the He and Can Be Turned On Instantly to Extinguish a Blaze Before It Gains Headway Modern methods of fire fighting aim at halting a blaze before it gets a good start, and this plan is well illustrated at some of the mills where large piles of logs for pa- per pulp are stored. Batteries of “monitor have that as much as 1,000 gallons of water per minute could be directed nozzles” been installed so from a single hose in stantaneously at the discovery of the blaze, eliminating the delay that would occur if the fire department had to be summoned and hose lines laid. The nozzles are dis tributed so as to cover the _ tire pile and protect every part of the heap. Although such an installation is costly, owners con he investment a wise one where as 20.000 cords sider t much as of $300,000, mav be , representing a value included in one pile. SHAPE OF EARTH UNDER THE SEA GAUGED FROM SUBMARINE What shape of the earth the ocean? Scientists made } charts on the basis of soundings, is the under have manv but more accurate maps are to be prepared of the ‘ Atlantic coast and and the Car region off the the Gulf of ib] Mexico sea, by means of special apparatus car on the submarine “S-21.” most interesting instruments to be u is a pendulum arrangement which d mines the force of gravity at any poi! One ot the earth’s surface where it is set uy] operated. It cannot be used satista from an ordinary vessel because o1 swell of the water, but it is practical applied from a submarine. Accom ing the expedition will be two “ boats from the navy department. will be emploved as the surface for the submarine, whic ' quarters also be used in taking accurate sour by means of the sonic depth rec The pendulum apparatus is the in of Dr. F. A. Vening Meinesz, of the N erlands, who has come to this count the guest of the Carnegie Instituti Washington to aid in the under-sea urements. He designed the instru for use on the comparatively shak of certain parts ot Holland, where

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POPULAR MECHANICS 969 ipparatus was not accurate. It Once harpooned and subdued, the whale ed so satisfactory that the applica- is hauled into the steamer up the special to sea measurements was immediately — slipway at the rear by winches. An iron- ested. The submarine was therefore lattice door is dropped down to keep out ed into service and has become a the waves. The vessel has twenty-two big t help to the scientists in the impor- boilers for the manufacturing of oil. Ex- task of charting the floor of the sea. perienced whalers say that it is useless to a fish in the same waters two seasons in suc- IG SHIP AS FLOATING FACTORY cession because attacked whales that suc- HAULS WHALES ABOARD ceed in making their escape shun those districts for at least three vears Vith a novel landing grating in her ‘i er-looking stern and with powertul > ches aboard, the whaler “Antarctic” PEARLS FOUND BY THE BUSHEL ently left Cardiff, Wales, for the waters IN AMERICA’S EARLY DAYS South Georgia in quest of the riches Prehistoric American |] 1 ndians probab! t come from blubber and other prod picked up pearls bv the yushel along the Ohio valley, and diamonds were found in proves favorable, the “Antarctic” is many localities. of the big sea mammals. If the sea according to Dr. George F. Kunz, research curator of preciou 4 | stones of the American Museum of Natu pte 5 Em. - ; . * oon gee +1, , + ’ agg ee | ral History. Tracing the use of the ge | by the early inhabitants of North and South America, he has concluded that the Mavan aborigines were far behind those of Africa and Eurasia in the working ot metals and precious stones. Althoug! | diamonds were available, the Indians d not employ them, he said. Jade was used by early settlers in Alaska, copper by In- dians near Lake Superior, turquoise by pio- neers in New Mexico, and in Chile there were quantities of lapis lazuli. Most « the gold and copper was picked up in the streams. Dr. Kunz points out that it strange that the Indians evidently kne little of the rich stores of gold in | fornia later develope d b the white M. B ew of the Big Whaling Ves- ‘Antarctic,”” and a Glance zh the Lattice Door at the f the Slipway up Which Whales Are Hauled with hes and Cut Up and Pre- pared for the Boilers pected to capture 1,000 les. Thev should about 60.000 barrels l, which alone would vorth some $1,500,000,

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Olive! . ‘ HH ‘ m ~ ey he Boe hee 4 HW Trestle « ng Logging Railroad over Makes It an En By WALTER RALEIGH ge f Squared ilt to Carry a Equipment for Modern Loggi i is LOGS t ] the 7 We wit! ‘s imbe ; , urniture ana teriot de 9 rv-pro- duced tl ese da . ~ 1 ¢ rorest are ’ 7 > 1 merelv the source mm which ’ odern mechanic e deve Oop e product demanded . 1 > Gone are the davs « rough-looking imberjacks living on baked beans, salt and molas es, hose abilitv. rested efly in wielding a ke Ip ovel 11 eve il teams ot tubbhot my 1 ' = s A . rpne modern orve ls i? e en VorT eF nd wses the late t mie | method to ccomplish his purpose. oodsman is a produ t e present-day inew age and uch is satisfied with nothing but the est even his foo I and phvsical comforts must be first-rate, alth oug or eeks far from large Cl ging camp has advanced and-molasses era to th t the be t hotels ] b h he may live ties. The log- from the salt- e diet obtained 1 1 nouses are a D eep yrrmous Industry electric-lig] l. t e dry, library, radio, and a of city life Che modern ] i the iT ¢ The crooked stick to plo t ceased to demat 1 cle In getting out the be western to est not ! } hout the log y camps mecl 1m1¢ ] ] t ho ld he é ments as the ould D mobile pla it to | ) 1 é cars about. It takes sl 1 eng e¢ capital to tackle the eat tains of the weste coast scale methods are consice standard gauge must vines must be ground made Roadbeds as sl bridged Ravine; red, mwers, iau e essent ) essed ¢ does not use e logger | the esset In the ore il is fou Under the . ed, a mule > the requll -ed in an aut e assemble r and lars voded mou \s only larg railway Deep 1 nd the roug lavin

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— ~~? he crack fiver of the eastern states, provided for the strange engines that the timber trucks from the hills. But before anv logging can be carried much must be done, including the porting of all the equipment to the en camp. Since the modern logget “every modern convenience,” thi an investment ot large sums ol nev before a single tree is cut. the railroad in operation to the ite of the logging camp, with the er car that ll provide electricit with shower car and drving car ] commissary equipped, the next step put up a rig for collecting the logs. e modern logger, in selecting his p. first hunts a particularly tall and eht tree at least eight to twelve feet at se. This is the spar tree chosen by the rigger as the kev to the work in that ion. Early in the morning he will don long spurs, and using a rope which he ibout the tree as he works himselt up ‘ top. 311 1e¢ i tor t tel the o ome Carried Down from the Hills by Special Railroads, the Logs Are Dumped in Lashed Together in Great Seagoing Rafts for Distant Delivery -__ e e e\ , aA ] " \ ’ ‘1 1 ho to Streams Where

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972 POPULAR MECHANICS one end mav= strike smaller tree belo VY. al because ot the speed their flight and the trees may | knocked down, Fre aquently trees several ter around are thus uproot In some cases where is not pos ible to sti travel high, one et the log is allowed to d long he rou d. \\ one end tree, the grou cairt LV oreat lence. Stones as b baseballs are hu through the ait even the knot on the « Ot two cables 11 throu h the ) 1 winch doing the p has enormou powe (Genet the log next loaded oO! 1 ready for trat t to the mills nea ] roe cite CSE —— ones PS - — ive sf e tT 1 | The Fall of a Forest Giant; the Pygmy Figures at Its Base Give an Idea of spacing them apart the Immense Height of the Tree shee "hee m re While vorking in the spar tree the head send the log irround the curved ti ! rret prepared r the uy cables using a spiked ridge along the which stretch out to other trees in all di keep them from pulling apart Ihe rectio1 t the M1a t loo ke the center is thu through the log the se] pole « n enormous te from well up ra iv truck to ra iy truck on this tree, the overhead cable strung ogging trains, usua pe yO out toa t tree Ww ? he JI) teet teep race ive i pe i ) blen I 1 the spar tree. If the contour of the roviding efficient braking powe rround favorable, it la be as much a mpract ble to usé uir b ke oO 5,000 feet away. the fact that the trucks must be sp | € ) I » be brought ire litted b t irregvula terva acco! tO TD € to thi oreat cab ret¢ red fro | é rt ot the Og Thu the b | 1 spar to tal tree, and bv me oO i met! | done bv hand. and it the mos | f \ ] ( t é orvers Ce riK ( } ire oT l] the occupation connecte { | drawn into the “vard,” which is the region ving It a loge should roll from its pl out e base of the spar tree By such there is like to be a wrec] \ the ) method ut out in the whole are very great, the engine are often bu region yf this center pole. with several vertical pistons which drive After be are transported by rotating horizontal shatt geared to t means of e. Oftentimes they drivewheels. The speed ot such an en vo fivir air on their over- is small, but to make up for this, it | head t giant logs travel, enormous driving power.

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POPULAR MECHANICS 973 the Mill Pond, a Run- Leads Up to the Waiting and up It Log after Log es to Be Cut into Boards; ng the Logs Out of the est Is No Longer a Job Oxen and Horses; In- the Endless-Tread Hooks On to a Wood and Yanks a Cargo to the Railway; An- Way of Carrying Logs More Open and Level ntry Is Shown Below; High-Wheeled Carts Can Up Two or Three Giant ns, Swing Them Free e Ground and Go Trun- Off to the Track Where e Loading Is Done

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974 POPULAR MECHANICS Phot Courtesy 1 3. For > Toppers and High Riggers Remove Branches and Top of a Tall Tree and Place the Rigging That Brings th Timber through the Air, Ready to Be Loaded from One Central Position e railroad delivers the logs to the Using such modern production meth¢ nearest waterwav where they are stored logging is now a vear-round industry. I1 in an inclosed quiet region known as the stead of waiting for ice and snow for eet %* | boom. As rapidly as possible, they are purpose of making it easier to haul tl made up into huge cigar-shaped rafts that logs out, the winter impedes the work rival an ocean liner in size, running up to the men. Yet, with all the mechanic lengths of as much as 1,000 feet and draw efficiency of wheel, steam power and ele ing thirty feet or more of water. The _ tricity, there still survives the pride of whole is held together by a cradlelike con individual woodsman whose stout sine struction of timbers and lashed with can wield his ax so skillfully that o chair Towed by a tugboat, the rafts stump as smooth and polished as a t often make 1,000-mile journeys, vithout a mark showing, will be left. YIELD OF DIAMONDSINCREASING washing machines have been acquired 1 1 1 | FROM BELGIAN CONGO that manv more diamonds are found scarcely any increase in the number Since the World War, the Belgian Con- workers. The Congo fields, however, vo has assumed increased importance as a not compete with those of South Af diamond producer, the vield erowing from in point of size of the stones discovers about 15.000 carats in 1913 to more than Not long ago, a diamond weighing 41 1,000,000 carats in 1926. These results carats was unearthed at the latter fiel have been attained largely by the installa- and sold for $25,000. When it is read cus 1e market, it is expected to bri lat sum. After the Congo stone 1on Of jmproved machinery and the adap- for t tation of better methods of mining. Steam twice tl units have supplanted the pick and other = are separated from the mud and soil, mat hand implements, and the latest types of | of them are sent to Antwerp for cutting

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POPULAR MI tCHANICS SILK IS MADE FROM COTTON [ IN HUGE PLANT \ plant costing $53,000,000 is being com- 1 in the hills of eastern Tennessee to ke artificial silk from cotton. TI! duct has no relation to rayon, the syn- 1e ic silk made from cellulose extracted m wood fiber. The new artificial silk aid to look like real silk, feel like it, and » to wear like it. The plant was located Elizabethton, Tenn., because a mam- chemically pure re furnished one of the necessary ma- th spring of water ls The other is cotton linters, the rt fibers which adhere to the seeds en they are extracted from the raw ton in the gin. The linters are removed m the before the latter are re- ed to extract cotton-seed oil, and are seeds re or less a drug on the market, as their at least in peace times limited. In the new e invention of German chemist, ton is put through a chemical treat- nt that the cotton in the past, e been process, a the breaks down cells. he material is then processed again to ‘onstruct new resembling il silk. From the new material, the silk read much the same wa rayon thread is made by squirting t] cells closely formed in is material through small holes. MIXER MOUNTED ON SPRINGS CHURNS BUTTER AND FOODS “4 A spring mounted churn, food drink mixer now on tl and 1e i market butter, cake batter, whipped and meringues, l sorts produces cream and mixes al of drinks. food to be mixed is placed The in a con- sealed gli tainer, mounted iss veen two vertical coil springs. The erator then grasps the top spring near middle and forces it up and down until container acquires a vertical move- t of about five inches. Approximately e minute is required to produce butter. 4 Motor-Driven Brush to We Aan Top Does Job Automatically as Car Passes through Laundry BRUSH TO WASH AUTO TOPS SAVES HAND LABOR units In a wes t- ] ariven One of the serviceable ern automobile laundry is a motor revolving brush that cleans the tops ol the cars as they pass along on a moving ru wav. This does the work of one or mort attendants, gives a thorough cleansing, as the bristles are adjusted to reach all p and helps maintain the output of the laut dry on a regular ba is, S ct » dela necessary for Va hing the t ) GOLF-STROKE METER CLOCKS LENGTH OF DRIVE A new golt the n ice d p! measures the yardage of , a stroke meter, recen on arketl the heftiest drive. The ball bal ] | drive, automatically to + Its position

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POPULAR Metal Boat for Slow but Safe Travel and Water Sports: with Which the Paddles Are Operated METAL BOAT IS CIRCLE-SHAPED AND WON’T TIP OVER For water sports with a minimum of danger, a metal boat, of circular shape and holding eight persons, has been in- troduced. It is kept afloat by an air-filled pontoon in additional aid to stability, and is propelled by paddles. Because of its shape and size, it can be rocked without 1: 11-3] nhazard and 1s not likelv to tip over, MYSTERY OF WILL-O’-THE-WISP DUE TO PRESSURE? Ce he 7 1 4 That there may be a relation between the occurrence of the will-o’-the-wisp, the trange, luminous phenomenon’ some- ob ery ed 1 the n-e wre t the air 3 the e pressure ot the air, is the ie times in the woods and places, wit 7 a German scientist who has been studving th Not long ago, he observed four small bluish flames, about 9 ° ° conciusion of e mvstery. other MECHANICS the height of a candle’s on a swamp near iron mine. Their light had no heat and was suit ficiently intense to per mit reading the face of \\ itch, They lasted about teen minutes. There are several radioactir ‘ ‘ P springs i the vicini © next dav. the scho cou ] tt ] no source the odd ime but ce ( ¢ that they t caused in some Way ‘ 1 1 | theatmospnericand othe Col tions, the air pre , ; sure Ta pe j ta | 1 1 , e higher tne pre 1 1 t less ¢ e 1g t g 5 appeared to he , 2 dependent of air tet f ature, During the a German officer sav ¢ ] 1] eenisn and ve } 1 mes shooting up bot l S t 0 i T road ¢ 11 1, the Wo over Ww ch heavy ' 7 7 7 iery il been pa | 1 before. Note the Handles flames. twelve to eichtee duced by the great pressure caused by t passing guns, scientists believe ; that fact and the rai combined with the hea 1 5 | “ the gases that streamed from the lomenon., earth, producing the phet SAFETY CHAINS FOR SHOE SOLES PREVENT WINTER ACCIDENTS Chains attached to the underside of t xluced for we as on siipperyvy wW «ail where falls kely to happe Thev are nished for me women and el 1 aren arn a mor! rugged tv pe 1 - 1 made tor huntet The links at especially adapted to give a firm grip. climbers and railroad men.

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POPULAR _YERS FIND NEW SUGAR CANE IN HEAD HUNTERS’ LAND | airplane expedition into New Guinea, of the head hunters, has yielded 171 ict varieties of for the 5. department of agriculture, including sugar cane nty wild kinds and one species wholly to science. The expedition, under leadership of Dr. D. W. Brandes, was ual as it marked the first use of the lane by plant hunters to explore new Fourteen lakes not on any map re located, and a number of other new The ex- tory. vraphical features discovered. lition spent seven weeks on the upper river, three weeks in the Owen Stan- weeks on the upper range, and two river. CIRCULAR WALLS OF CONCRETE BUILT BY MACHINE machine for building circular _ silos and similar structures of mon ic concrete, reinforced with steel, has Cincinnati storage invented by a engineet ustable to structures from ten to ntv-four feet in diameter, the machine des a “spider” placed in the centet ng up a mast, and carrying extension the circular for ur men can operate the machine, which support Ils. and ; Movable Forms Which Speed Building of Circular Storage Bins of Reinforced Concrete MECHANICS 977 Henry Miller Dictating Machine Which Records Messages on a Fine Steel Wire Instead of a Wax Record WORDS ARE RECORDED ON WIRE BY DICTATING MACHINE A new dictating machine which rec the dictation on a fine steel wire has been introduced in Germany Dr. Kurt Stille, the inventor, is shown demon the apparatus to his stenographer One use predicted for the machine is the recordi of two-way wirele 2 NEW METAL FOR AUTO USES OUTLASTS IRON Most of the good talit ot ca n ind steel are cla \¢ ranew met be ing employed in au obile motors and tor other purpose vyhter than iron id tougher, so ( ders of 1 ould not | eto bet ) ¢ so often, it is iid Che material is made by placing a certain substance into a ladle of cast iro The normal qualities of the iron are cl inged although it retatt practic illv the same chemical nature @ Our Bureau of Infor all questions regarding articles appearing in th mation will answet is Magazine,

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he Government Sculptor at Work on Plastic-Wood Model of Prairie Schooner, Our First Transcontinental V: cle, for Exhibition in the Transportation Exhibit at Seville, Spain By G. H. DACY is the latest creatiot1 or the government exhibit builders at Washington. Mechanized “Bo 1] man and is twice as long as high. 1e IS taller average She resembles a normal cow which ha been inflated like a rubber tube to thrice her normal size By means of a projec slide large piece of tion lamp, the * picture of cow was focused on a wallboard Che outline of this image was then traced with crayon on the board. Subsequently, the figure of the cow was cut out with a scrollsaw and prepared for educational ex- hibition purposes. Beginning with the 1929 season, this talking cow will be displayed at state and interstate fairs throughout this country, and will be heralded as a star attraction. Some 20,000,000 Americans will be enter- tained by her antics and lectures on how The talking cow is ma- attendant who five milk is produced nipulated by a concealed operates four electrified switches, 978 tring ‘ control levei I ( joint and talking iclhline it namic power al iplifier The cow four-legged actre engages in a mated dialogue with her owner—a dut dressed as a farmer. This conver explains in popular language how the mal manufactures milk from the ge ous amounts of grass, grain and ot forage which she consumes, This esting exhibit explains a mystery has long baffled the public. It ren the riddle from that old saying popu among stockmen: “There is_ notl darker than the inside of a cow.” The inventor of Uncle Sam’s first only talking cow sits behind the scene ai actuates “Bossie” in performing her set tricks, such as switching her tail, movi: her jaws as she talks, chewing her cud a bobbing her head. This “show” cow tall by radio although by near rather tl remote control. Her power of speecl centered in a talking-machine attachme hidden behind her body. It is provid

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7 ling a Mechanical Man Who Will Talk by Radio, Gesture, Move Jaws and Head Back a k 1 These Figures Are Used to Attract Attention to Governm hibits amplifier which steps the power to listen to their v Suc m kins » 400 volts. A dynamic speaker, con- hammer home scient facts of impor r of a large coil of wire in a steel tance which otherwise are spurned by the provides the deep bass voice which average farmer, stockman and layman e”’ uses in telling her storv to the Phat is why Uncle Sam and Aunt Sarah vhich stop, stare and study in are emploving the cut-out effigies of hu lement when they first see this scien- man beings as the newest assistants oi ideshow.” scientific teaching \ case in point 1s that echanical inserts and light boxes have’ of a pair of talking manikins dressed in n placed in the big cow as visual edu- tailor-made suits, which will be shown on irs which will show to the audience at the 1929 fair circuit. They were made in ince how the food is handled and di- the same wavy as the cow bv projecting lan ted in the different stomachs. These tern-slide images on wallboard, marking ht-of-eye” demonstrations, linked to the outlines and eventually cutting out the nikins lecture facts which spout from the _ figures. mouth, tell a very technical tale in ach ticulates emphati- ple, condensed manner that all can cally to stress his arguments concerning a tand. met} ods oft dait eeding breedi g and 1 arKeting, hand stick \ led behind the man- here is a realistic appeal about lifelike that gesture and. gesticulate ch draws the crowds. The office ibits of the U. S. department of agri- One while pure-milk production an 1 = dummy his ot the other small electric motor, conce ure reports that talking dummies that ikin in each case, operates the gesturing ve their arms, heads and mouths are arm. This motor also actuate a me- ws” wherever shown. They fasci- chanical plunger attached to the lower voung and old alike Folks return 1aw ot each eftigy The face of the imita- ral times to look at their antics and tion man made of dental rubbe ited

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980 POPULAR MECHANICS a = ——— : ; fhe designer i! model makers are ni engaged in the produ tion of educational e hibits which will be d pla ed at the world’s at Seville, Spain lr} expo tion will be open t the public for about months. The long sho period prevents Uncel Sam from displaying hi most spectacular mecha nized and motorized e» hibits because of the dif ficulty of keeping them i: perfect running order fo months atatime. Neithe ie talking cow nor the manikins will voyage t the Old World on this a The ships of Columb brought the first pur bred live stock to tl United States. Phe —s eam enue — al i} i] were the Tore A Corps of Sculptors and Artists Are Kept Busy Making Uncle Sam’s Educa- beat of our curret tional Exhibits Different from All Others : $3.000.000.0000 live-sto« with water colors of the proper hue. Oil business. One of the Seville exhibit paints were impractical as experiments a remarkable group ot models of a1 showed that they caused the rubber to Spanish sailing hy incl ored neal harden and deteriorate. The plunger and Florida coast while cattle ere be the rubber. whicl alternately is stretched driven a hore At electric far upplie and loosened. move t} e moutl oO! the the breeze whicl flutter flag and dummy in accurate simulation of move- and ripples the imitat 1 ilt water. W ments accompanying human speech are produced in tl chemically col One model stands in a comfortable pose ea by means of a board which is move with a foot resting on a box, while the up and down in the tank by machinet other 1 close by. \ government repre- U1 cle Sam at frst chemed tO wuUs¢ sentative, hidden from view behind these rubber sheet as a sea and a special manikins, operates the dummies like a chine with many extendable arms whi “Punch and Judy” show by means of tog- would bob up and stretch the rubber gle switches. He shifts the records on revular intervals and then would fal the concealed talking machine. linked to that the effect would resemble the acti a radio loud speaker hidden in a bushel of waves. This plan was too costly basket, which rests on a box near the finally, experiments with various wat talkers. The words and gestures of these making devices were conducted in a la talking models are co-ordinated so that laboratory tank at Washington. Event the manikins fool the more distant spec- ally, a satisfactory wave maker was di tators, who imagine that a duo of federal vised. The experimenters found, hoy farming experts are the actors in this edu- ever, that it was necessary to provide cational show. The phonograph records sand beach to produce the desired wa which give speech to the manikins and action in the imitation sea. automatic cow were made by a national Charles III, king of Spain, presente manufacturer on government order, George Washington with a champion ja‘

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POPULAR MECHANICS 981 Making Educational Models of Farms and Farm Buildings at the Washington Exhibits Laboratory; the Models Will Be Sent Throughout the Country to Keep Farmers Posted ed “Royal Gift,” in 1785 \ plaster Invaluable exhibits of corn, wheat, cot- uette of this animal, exhibited in a ton and tobacco will also create interna- case, will be shipped to Seville. The tional interest in American varietie rhe eulogized as the progenitor of the tobacco exhibit is astonishing in that it erican mule-raising industry which features an automatic smoker, an original adds up to 5,000,000 animals. device which smokes four cigar imulta- e good-roads exhibit consists of re- neously and ascertains the burning qual- ble models made of plastic wood ities of different kinds of tobacco It present the “then and now” picture operates by means of water displacement insportation in the United States. and air suction. group represents a prairie schooner Over in Spain, the favorite amusement louble team of mules, hardy pioneers is watching matadors kill the wild bull | their hunting dogs, who braved the In the United States, one of the great ar gers of hostile redskins, wild beasts bitions ot our government i to teach | unexplored territory in extending farmers how best to raise tame bulls that lization to western conquests. will aid in more and better milk produc Pioneering transportation, slow, labori- tion. One educational exhibit consists of ind hazardous, is balanced by asecond =a large number of model sires, the cut-out up of models depicting an improved photographed figures of real bulls. Spec iv and the modern vehicles of cross- tators are asked to pick the best animal in try travel. The tourists, a honey- the group. On the opposite side of the ning pair, have stopped to make a pic- display, each bull with five of his best re. A motor truck loaded with freight is daughters is shown by models. The ex » parked temporarily by the roadside. hibit shows the impossibility of selecting models in pantomime tell the story of live stock merely by examination without progress has fostered better trans- consulting breeding or production records tation aided by good roads. The cam- —‘all that glitters is not gold,” either in n has run the gamut from mule power metal or bulls soline, frot t speed of thirty miles Another new exhibit consists of an effig upward of 300. expert that moves his arms by machine il il

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QR? POPULAR MECHANICS

A Group of Model Cows Used by the Dairy Department to Illustrate to Farmers the Features of Good Cattle and talks bv use which projects moutl che Ca Solu ( Che urlace < mH de Oo colore } ~] } 1 CHICKEC! Ca di

He is show ¥ 2 ‘e a es: : ec WE linn ee Ah Wal y

in the Best Sizes for Both Milk and Beef Production a speci machine in this imitation cle é ire ] oon ot finely Wwovel dipping a chicken in manikin’s mouth on , , ' , | lice nad mite peaks as he describe ti< emical re pro ected | | 14 ] é ne Phe Che multimillionaire aie throug i OE rats 1 here 1 i b cloth back of the ; 1 : vhnich the word the dipping proce visualized by the use of W rought cro ¢

Making a Topographical or Relief Map of a Government Forest; These Huge Maps, Carefully Built to Scale, Show in Full Relief Every Feature of Immense Areas of Land

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POPULAR MECHANICS 983 models of two Lilli- in houses rat- fed and the other un- Models of rats, one ted on endless belts operated by motor, through the walls nder the floors of and they troy foods, clothing é xposed house ww exactly how | other articles. sy the use of different lights and a machine, Uncle has perfected a new tem of simulating for- This sts of an excellent lored low tilt Ny exhibit hres. painting of a virgin est. Almost a red lurid light is this picture ted at varying speeds, are employed to immedi- ntered on while fans, op- “luce remarkable shadows. To the ator, it appears as if the forest were ing to the ground. This es to impress the public in general, | motor tourists, hunters and fishermen with the fire control in the national forests so exhibit particular, importance ot ] thy ie stupendous annual fire losses may reduced. GREEN-DISK SHADE FITS BULB AND ENDS GLARE \ small fitted with a holder that clamps over an electric- t bulb in green-glass disk, any being end ition, 1S rketed to hts in rooms, offices hops. The disk ree and a half ches in diam- ter, kills the di- glare into the eyes or on the work, hout cutting down the-illumination in e rest of the room @The United States air mail carried 1.654,165 pounds of mail in 1927, the com- mes receiving $2,643,454 compensation. Getting 149 Miles an Hour Out of a Two-Cylinder Engine Was the Feat Which Won the Light-Plane Race for This Craft “BABY BULLET” BREAKS SPEED MARKS IN AIR RACES ‘T he smallest plane entered in the recent ight-airplane races at Li Angele took the prize, gaining « t miles on its nearest rival in a fiitv-mile race on a « ed course The speed of the winner Babv Bullet averaged 149 miles an hour. The tiny plane was designed and built in the | ] Heat] lactor it Chicago and fl 1 In the race by Mr. Heath Onl irteen feet long. with a wing yrread of ¢ teen feet, the little plane weighs but 25 ounds empty. It is powered with a two-cylinder motor, and the speed it made breaks all records for such a small power plant BIRDS VANISH FROM STRICKEN CITY IN GREECE When an epidemic of dengue tever re cently attacked Athens, Greece, all the birds of the capital city unaccountably dis appeared Previous to the appearance ot the disease, which attacked more than 300,000 residents, the gardens of had been filled with feathered songsters Within a few davs hardly one was left , ] i led ¢ = Latl Zoologists were puzzled to know whether 1 ‘ 1 the birds themseives had been att ich ed by the fever and flown away to die in seclu whether their instinct had made sion. or them seek retuge e]

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984 POPULAR MECHANICS in the ground, Four pair ot steel rollers, about t and one-half feet in dia eter and eight inches wir were mounted below th: frame tracks so that the converging surfaces mac a“V” in which rested th: car’s wheels. At irregula intervals on ‘the rolls surfaces were welde: steel cleats of variou sizes and shapes. TI! four rollers were geare unit whe operated by the car’s m¢ to turn as a tor and could thus be driven at any given spee Shaking Table Which Gives an Automobile All Its Road Tests on One Plat- form, Taking the Place of Proving Grounds SHAKING QUALITY INTO CARS ON TEST STAND In this day of motor-car supremacy, manufacturers have gone to great lengths to obtain uniformly satisfactory .service, long life and better performance in their product. The daily production of an auto- mobile factory may range from 200 to per- haps 5,000 cars. Identical in design, style details are these cars One mav go to China, the and mechanical , next to Cali- fornia’s smooth third to Atri a the frigid driving atmosphere of Russia. roadwavs, a trackle jungles, and another to Considering these facts alone, it 1s small that the engineering and testing wonder divisions of the larger motor-car manu- emble veritable laborato1 1eS I} vy no limit to their extensive facturers re with practica one of the older operations. For years, manufacturers has had access to the great Indianapolis speedway as a testing ground for his product. Some automobile makers have constructed special speed tracks and elaborate grounds and one de- vised proving veritable tornado, Road to Dublin,” So strenuous is the hammer- ing given a car on this and perfected a whirlwind and “Rocky all in one. device that the equivalent of a season’s mileage and wear and tear is shaken into the machine within the space of a few hours. A huge frame was constructed of channel steel and this was securely attached to a concrete base simply by opening « throttle operation, the closing the cleat shocks of transmitted varying inten \ and at irregular intervals to the car itselt So terrific were these vibrations that et ployes could not endure staying in driver's seat and stand the punishme: ] After starting the motor and shifting t car into gear, they were compelled ti erate the throttle from the ground factory at once began to learn how to prove the car, AUTOMATIC SIPHON STARTS AND STOPS ITSELF An automatic siphon which starts out the necessity of sucking on the tu to exhaust the *. is being manut tured by a Calif nia inventor | lower end tube, which is 11 mersed in tl] liquid, is cork and the inlet somewhat high and in the side When it is plung« into a liquid, t! air in the lowe end forces tl As the siphon will on! liquid upward. work until the level is lowered to the cut out in the side, it can be used for su purposes as removing cream from milk

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POPULAR MECHANICS aera * ay Ski Jumping as a Summer Sport Was Inaugurated When Norwegian Ski Experts Attired in Bathing Suits Sped down a Greased Slide at Chicago and Dipped into Lake Michigan WATER SKIING MAKES NORSE SPORT YEAR-ROUND GAME Skiing, formerly classed as a purely win- sport which required considerable or ice to be enjoved, may become year-round amusement as the result of ¢ introduction of water skiing by the orwegian national league in Chicago. A eased ski slide was built at the navy pier, nd the skiers slid down it, wearing bath- suits, and plunged into the water. FORT MADE FAMOUS BY KEY IS RESTORED BY ARMY Fort McHenry, facing Baltimore harbor, vhich made famous ‘when Francis Scott Key wrote the “Star Spangled Ban- er,” after watching the British attempt to taf ‘ : . ike the place in a night attack, has been ully restored by the army under a special ppropriation by congress. Working from Was the old plan found n the war-department files, the excavators and bi ( rec the fort as nearly as possible to its cond tion at the time of the War oft 1812 Phe uncovered bv accident the old guardhouse with three small cells built into the ma sive brick walls leading to the sally port The latter served as an entrance to the casemates, each at underground § cave eight feet high and thirty feet long, pr marilv intended for the storage of powder and munitions, but used during the Civi war to confine pri one take it the battle of Gettvsburg The wooden gate of the sally port are of oak, four inches thick, and studded with massive iron bolt In the old messroom, a fireplace was un covered, in which hung a finely wrought iron crane. used more than a century age to swing kettles over the fire @ Good fuel and illuminating gas has been produced from low-grade lignite coal,

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POPULAR MECHANICS “Christmas Tree” of Water; Floodlights Illumin California Fount FOUNTAIN AS CHRISTMAS TREE RIVALS EVERGREEN a é ¢ Ol ¢ ( a disp at Fresno, ( e it vere arranged to fall in su ’ iv t t the +] ] ] ] : esempbied the adroop gy b ( r oO i fil tree e the lig | iced an effect lit vl ] + 1 a7 } ; Oo! VV en directed p the iter SIX-MILE-A-MINUTE PLANE BUILT IN ENGLAND In in effo t to cal ire € vorld’s air- peed rec ra mV eld ] lt ily at 318 miles an hour, England has oduced a ew ecret rplane expected to do six mile minute, or 360 miles an hour. The macn > ha been con ructed under ciose guar vl prelimina test s only been | ¢ ¢ people \ ould he up ) et ] le ( bed is llet nad © p ‘ treamlined ate the “Branches” of This be vide almost as proper vert porous enough to support MEAT CARVER HOLDS JOINT WHILE base, and a number of 1 into the ; done neg varm as pure wool ventilation yoInt an in the plane whi the el | ineidet up lt tly ist Veal | Lieut. D'Arcy Grei signed to Was plac ed in traini W eeks t the idea of what several ) ask. OO mile him fo1 “ ( t 3 hour means is gai from the fact that a at that speed could from London to Pari thirty-eight bring ( within less t minute hie igo nan thre W ould hours from New Yorl GARMENTS MADE OF CORK Clothes of cork made ot } + are being trie France. where a ciel has developed a met yf treating the material remove all the re matter, leaving the er of cork o sott and Pp ble thev can be folded hand without da because tl 1 rain, and be TCarsrc. Wa Wall CHEF WORKS \ nea Ca attac ment t holds the wl beef W i! le cook lice it exhibited at ne inventio! show in Lond i The consists of recently. \ ice metal trame d hold it

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POPULAR MECHANICS 987 FLYING HOTEL BUILT TO CROSS THE ATLANTIC vertitatt Truc™. N 4/$0 asi, { vente, assists tea; c. . "ae Low er Tle Ssen ° b 8. W. Clatworthy The New British Zeppelin “‘R-100,” Built for Transatlantic Passenger Service, with Accommodations for Fifty Guests, Is About Ready for the Trial Trip; the Ship Is 709 Feet Long, 133 Feet in Diameter, and Has a Gas Capacity of 5,000,000 Cubic Feet

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O88 POPULAR FLASHLIGHT WORN ON COAT LEAVES HANDS FREE with Extension Cord and Pocket Flashlight Case Leaves Hands Free to Do Their Work Battery on the coat, dress otl forehead, cap, Wort or in any ler convenient place, an elec- tric flashlight market leaves both hands tree and directs the rays where they are most needed. An adjustable bulb now on the and retlector can be turned to any angle, and current is supplied from a compact battery carried in the pocket or at tached to the belt. The lamp itself may be slipped into the pocket case, SOLID FUEL USED TO RUN DIESEL ENGINES An internal-combustion engine working on a fuel composed of pulverized solids an idea first suggested by Diesel—has been pertected by R. Pawlikowski, of Goerlitz, The engine will run on coal or even sawdust or rice husks. The idea can be adapted to any existing Germany. dust, lignite, heavy-oil engine by adding a special lock, which, during each suction stroke, is hausted, ex then charged at low pressure with a pulverized-fuel emulsion and, after being closed, loaded with pressure, in or- MECHANICS der finally to be discharged into the wo ing cylinder. Whereas in the case of original Diesel engine the fuel has to heated and ignited within a fraction oi stroke, the new engine allows a full stro] for the same operation. NEON LAMP SOLVES PROBLEMS OF HIGH-SPEED MACHINES The neon lamp, familiar because of widespread use in tubular electric sig: and less well-known in television, is rey lutionizing the study of machinery oper ing at high speeds. The neon globe is u ful in television because it can be lit extinguished, with no afterglow, in ar terval measured in millionths of a s ond. The same property makes it usefu studying machinery, for a rotating obj i] flashes of such illuminated by ation and timed to occur exactly brief du in with its rotation, will appear to be star ing still, or moving very slowly, if the 1 slightly. noticed in is varied The phenomenon the automobile when appear to st for an instant or even turn backward often movies wheels of an ELECTRIC VAPORIZER STOPS WHEN BOILED DRY An electric vaporizer that automatical shuts off the current when it is boil empty, has been — - a placed on the mar- ket by a New York manutfac- turer. In use, the jar is filled with water, the medi- cine added, the and plugged into an electric- light outlet. Short and long nozzles, adjustable to any cord position, are pro- vided. When the water boils out, it breaks the circuit. @ Contracts are in operation or have hb mail lines, 14,502 miles and calling for 30,450 mil of flying daily. let for thirty-two air cover!

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POPULAR MECHANICS 989 ecting Steel Work for the New Bridge across the Grand Canyon: at Its Highest Point the Structure Is 467 Feet above the River, and the Span Has a Total Length of 835 Feet BRIDGE ACROSS GRAND CANYON greatly. Ten thousand of these half dol TO REPLACE FERRY lars the Captain Cook sesquicentennial, com were issued by the mint as part of ening to tourists a vast and little- ; ; memorating the discovery ot the 1siand 150 vears ago region, a great bridge is nearing letion over the northeasterly arm ot (grand Canyon, 130 miles north of BAGGAGE CAR TO CARRY AUTOS taff, Ariz. From the precipitous 7 of the chasm it ae is ke a HAS DOORS AT ENDS ler web of steel, stretched across the Tourists can now conveniently take nearly 835 feet long, and, at its high their automobiles with them on railroad int, 467 feet above the river. It i journeys by means of special baggage « to be the highest highway bridge in with doors that open at the end vorld and is scheduled for opening plan simplifies loading 0 ut January 1, The main span has an — the automobiles of 618 feet. The e will supplant the toric Lee’s ferry, which r — - —_—_, been in operation nce 1872, six miles above e site of the bridge. NEW HALF DOLLAR OF HAWAIIANS RARE PRIZE If you have a 1928 Ha- alan half dollar, col- ectors advise you to keep for the coin is already orth $2 as a collection ecimen, and the value ‘xpected es With New Baggage Cars Provided with End Doors, It Is Possible to Take oe to increase the Automobile on a Railroad Journey

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Cooker for Gas Stove Lighting the Oven; It ne Burner That Saves Works over One Holds Salt, the Other Pepper; This Combination Shaker Is Made of China in Gay Colors and Does Not Tip Over Easily a Nearly a Whole Nurs ery in One Unit, Th Compact Outfit f the Baby Includes Crib, Dressing Table Clothes Drawer, Tub and Indoor Carriag with Rubber-Tired Wheels; It Saves t Mother or Nurse Many Steps Home Shoe-Shining Cabinet Is Concealed in the Wall and Has a Handy Folding Foot Rest, Also Space for Storing Several! Articles

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in-YOUT BIO) a . Left, Checkerboard Cake and the Three Special Tins in Which It Is Prepared, Showing Color Arrange- ment; at Right, Wall Desk for the Telephone Also Has Room for Accommodating Writing Materials “tecuue Below Is a Set of Racks for Drying Small Articles; They May Be Folded Flush against the Wall When Not in Use Fork Clamp Grips Potatoes and Other Things Firmly without Burning Fingers Lever Garment Hanger Fits in ¢ Door Frame without Use of reel Bolts or Screws; Ends Are ¢ teh? : ; Protected with Rubber to Pre- Fat vent Marring Woodwork \ ccalieeai

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Inventor with His Plane, Which, Vertically: It MIDGET PLANE WITHOUT TAIL RISES VERTICALLY It Is Claimed, Is Practically Tailless Belgian A midget airplane, practically tailless, with and a new type of wing ailerons which, it is claimed, enable it to rise al- most vertically, has been invented by a oung Belgian. Instead of the usual aile- rons used for banking the ship in a turn, the new airplane has a pair of large mov- able wing sections on either side. It is driven by a small two-cylinder engine. ELECTRIC PROSPECTING HOLDS HOPE FOR NEW MINES Electrical prospecting may speed up the location of hitherto undiscovered mineral deposits and help meet the increasing de- mands of industry, the American Institute of Mining and Metallurgical Engineers, in The cal prospector depends on the same phe- that and traction and gas and water companies so much trouble in the fact that current passing through the ground seeks the easiest path. In the cities this path is often the gas and water mains, and elec- which destroys their joints, re- recent convention, was told. electri- nomenon causes electric-light cities— a trolysis, sults. In prospecting, however, the cur- rent fntroduced into the ground at one point will flow much more easily through an underlying mineral deposit than it will through the earth and measuring instru- KCHANICS ments at the other en the observation Aerial phot rec: the fact. raphy also is being wu with outcroppings of rocl 1 - otnet success to bring surface indicati of buried minerals. GAS FROM GARBAG! TO HEAT HOUSES IN THE FUTURE Gas manufactured f1 earbage and other hou hold may to heat homes in the waste be u ture, according to D Gustavus J. Esseler Can Rise Almost Harvard. Fuel va about twice the heat c tent of ordinary artificial gas has been tained from such wastes by fermentat 1 of the cellulose they contain. Cellul abundant constituent <« t ) is the most etable matter. PORTABLE AIR CAMERA USES STANDARD-SIZE PLATES A portable aerial camera for still p tures, using standard eight-by-ten-in plates, has been developed by a Holl wood studio. The camera, which is « very light weight, has a twelve-inch le and focal-plane shutter and finder, which, with [ carries fixed focus, makes possible to get high speed of operation

His Came: New Aerial Which Is Portable and Uses Standard-Size Plates Inventor Demonstrating

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POPULAR MECHANICS 993 nd Yielded Six Hundred RAPE VINE OVER CENTURY OLD PRODUCES MANY CLUSTERS famous grape vines in rld is at Hampton Court palace in d. where it has been growing for irs, This season, 600 fine clusters vine, which 1 i on the huge given care from year to year and is sup- “ucted a wide area under glass, S| 4 v1 by a irge, specialiv con that covers REST HELPS RAZOR BLADES REGAIN SHARP EDGE fatigued as do other and, for th razor blade tals become at reason, letting the rest for a week or two ometimes permit it to regain a fairl, tactory edge even though it was so as to demand di Keeping blades in an anti-corrosive liquid, in- | of wiping them off and putting them in the razor or in a case, also pro- Be- e of the rapidity with which the aver- carding. s their life, metal experts declare. man shaves. with a safety and the and Sixty Years Old, at Fine This Yea large imber of ha +] ec ‘ mie ( e. 4 er ha est l ed razo1 1 tain its most etfe r for only about 1 econ ELECTRIC PAINT-SPRAY GUN IS EASY TO HANDLE Ease of handling and the ( pette ré ire cl t ( ( { in imp1 ed elec ( ) n pp Ing mn e p t Ch ! ‘ othe qu | t oO ite I On alte ing ol ect curre 1 al co r yrcke | pre velor ) ey tyv-five to th cult place with a minimum of waste. Three dt} of spray are obtained by changing nozzles The gun weighs but five and one-halt pounds and holds a full quart of liquid

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ih shee oat Spices waa Instead, he tore it neatly in halves with his bare hands. He told me his secret. It Was — canon dake bs ll cn = ian ha beautifully simple. He merely broke the skin of the apple by running his thumb out looking at the grapes, the pert nail in a circle around the outside After commands the spectator as follows: that. it Was a imple matter to twist the “Take two grape out ot the bottom r¢ apple intwo. And so I turned strong man. Take as many grapes out of the [ tore apples in two. Of course, my audi row as are left in the bottom row, ence was never allowed to see me casually “Clean out the bottom row. running my thumb nail around the apple “Make a mental note of how m before the show prope commenced grapes are left and then sweep all Listen to this one. A spectator is re- grapes into one pile.” quested to tear off a number of grapes And then comes the grand denoueme from a bunch and to arrange these single The performer takes a banana fron grapes in two rows, with the top row fruit bowl, and on peeling it he discov (farthest from the spectator) containing that it has been magically divided one more grape than the lower one. With- three pieces—the exact number of gra 994

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Ewa tila ial eae ll Se POPULAR MECHANICS 995 The Gre: anatr ] Grape Mystery, in Which - d NEEDLE , THE BANANA [5 Yc DIVIDED INTO \ ATH REE PIECES /\ (Sse XX aN the en 4, CROSS SECTION SX. Vy’ OF BANANA N YZ / been left on ¢ ible ! adone Take a rod the picture Do vou see e pe or! can, with nee 1 thread, previously cut 1 into three parts with removing the skin? Does that ex Or ¢ pe ( | { e tric the banana part? And now you're This one has to do with the balancing ot “but how do vou know there will a banana on the crown of a soft hat. The ree grapes left?” Well, that’s easier performer does it with a long needle which Go back a few paragraphs and look he has concealed in the lining of the hat e first command the performer gives: This needle is pushed up through the felt e two grapes out of the bottom row.” into the banana, and the \ 1 are “take two” means that the answer Did vou ever see a banana peel itself always be three. If you say “take No? Listen the answer will be four; “take lake a large, fully ripened banana and the answer will be two—alwavs the turn back about one inch ot the skin ver is just one more than the number Light a bunch of oil-soaked paper o1

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996 POPULAR té¢ t aaron it t¢ 1] porte ff € Dizi € thre I peele | b i- cture Vacut ll then ¢ b ina completely the be e. m kin Brie r ¢ tone 2Yor ke tl ihe pe l | t pectator tor! in ( rom t unprepared ( e, tl magician removes two or three | Ol bright \ colored | ib Tl bc lhe whole ck hinges on the little | ipparatu own in the illustration lr} eedle, just long enough to go completely through the orange, aroutl d t] © eve of whicl ha heen threaded and wound the let eth of ribbor Che loo e end ot the ribbon MECHANICS Balancing a Banana on End atop a Soft Hat Is Easy If You Know How, and Making the Banana Then Peel tion of Itself Is Just a Varia the Hard-Boiled Egg-in-a-Milk-Bottle Trick is fastened to the orange with a small pin. It 1s an easv matte when table, to secretly remove the ribbon ] : needle from \ coat pocket your hand. ing the orange from vour left Remove the pin \f recel\ immediately press the needle into it. shown on the opposite page. The next the removal of a tep i piece ot peel so that vou can get at needle. Once located out, under cover of the left hand the needle is completely out and conceal in vour right hand, you tilt the or toward the audience and proceed with eated at wound Hold it in a spectator, you small the the needle is pulled \fter ed to his ang the production. At the conclusion of the tr it 1 natural movement to wipe that is a hands on a handkerchief, and in } t eration the needle i removed trom \ right hand and placed fs your pocket Another mind-reading stunt: The p | asks a spectator to hold an orat the othe lormel apple il in one hand and an to think hard of one of them. Ton experiment less difficult, the asks the spectator to hold the hand c taining the article he is thinking of cl forehead. The After due “concentration,” he a the spectator to place both the orange away ake t performer tu

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POPULAR MECHANICS The Final Step, When Yards and Have Been Produced from ar Borrowed from the Hostess’ duction Is Quite Simple after

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IDS POPULAR MECHANICS pple on the table The “mind readet len take the apple and orange, and by placing them to the spectator’s forehead, he tells which one was selected. The secret of this effect is ab- surdly simple. When the per- former turns around, he glances quickly at the spectator’ hands, and the white oO! the two he knows was the one which was held to the forehead Notice the difference shown in the picture. You must secretly note which } and held the orange and which the apple before turnit back. your Che beauty about all these fruit tricks is that nobody ever suspects an innocent looki1 Lg banana, orange or lemon of | aving been | Y, Y Notice the Difference in Color of the Hands? That Is the Solution of This Mind-Reading Stunt * prepared in advance. Its skin is guarantee for its purity, and who would expect to find a coin or a diamond ring or the im- portant note concealed in a lemon? It can be done, though, as many a stage ma- gician has proved. Such tricks as that, however, require elaborate preparation and special “gimmicks.” A gimmick, you may remember, is any kind of device that helps the performer fool the eve. Most of the tricks here described, how- ever, require neither gimmicks nor prepa- ration, and, best of all, you don’t even have to furnish your own fruit. An apple borrowed from the hostess’ fruit basket always looks more innocent than ons brought with you—and_ borrowi tools for entertainment cuts down the 1 overhead of being a parlor enterta It’s even possible surreptitiously to tract a banana when o one ls te nerate on it with the needle to divid operate on it wi e neecdie to d ¢ contents in three parts, and then re the fruit to the dish in such an artle artful way that when you ask some to hand vou one banana, he can’t but pick the prepared fruit. It’s a best to let the audience render little he like that, and do the picking, when feel quite sure they can’t avoid picki right thing. This concluding number is only aca but it has entertaining value neverthel: Tear a small hole in a sheet of pap: and then ask a spectator if he can ou an orange through it. After everyone |! given up, you perform the trick. Just stick your pencil through the ho and begin pushing the orange. You c: push it all around the table. 3ut,’ savs some one, “I thought said push the orange through the hol Exactly—and isn’t that just what pencil does?

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POPULAR SNIFFER” IN GAS-MASK PLANT HAS UNUSUAL POSITION in a gas-mask fac- one of the most unusual | : * e 10D ol Lakes TANK as ns created since the war. Keach ME the testers to in- contained in the ng Ca e! ) properly. In an mas factory in London five ire ¢ loved The masks at “J ' . ' ters are incios¢ tight chamber and the face pieces nted so that the canis he them e out é Che five testers don e chamber hen filled th gas masks or] verfectly the te el e pure ail! If they get a \ ff o whic p duce tears, coug ng ¢ ¢ he ] | scarded OMBINATION DESK AND PIANO SAVES APARTMENT SPACE 1 ‘ mpoimation ola p inoanda secre- ( sIK ec or turniture ected i 1OTrK plano Manhu- one soli notthe small part- \ ' , ( When t kevboard ; | . 1 ] e clest 1 ove! t there 1 1 Té ¢ exe ce ( } ¢ r ( ) Y u eS re ¢€ yo i i t i i ] ( 1 De 1 if desired | For the Small Apartment This Combination of Secretary Desk and Piano Offers a Space-Saving Idea 999 CHANICS Comm. Richar E. Byrd Examining _ NCW AIR BEACON ON SKYSCRAPER VISIBLE MANY MILES EIGHT MORE LEPERS FREED BY U. S. AS CURED » been freed from | ol t more lepe n re the national leper home at ¢ e, La as completely cured, bt the total number released in the seven vears the institution has been in operation to thirty seven Only one of those freed has had a relapse and been returned. At present there are about 400 lepers under treatment chaulmoogra oil at Carville Che with Florida ot the majority were born in Louisiana and Tennessee number others are foreign-born, China Mexico leading. Greece and

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1000 POPULAR Turntable in Front of Garage Solves the Problem of Entering and Leaving \ by a Narrow Driveway AUTO TURNTABLE FOR GARAGE SOLVES DRIVE PROBLEM To overcome the difficulty of a na rrow drive in front ot his garage, an engineer followed a railroad plan and constructed 1 it turntable so tl ind out iat he could run Iris car in with little trouble Che table © smoothly adjusted that a child of six can turn it when the car is on the plat 1 feet in diametet deep, form. The pit is twelve and he and fourteen inche sidewalls bottom being of reinforced concrete. table runs on ball-bearing wheels. VACUUM TUBES FOR ELEVATORS GIVE AUTOMATIC CONTROL Three-element vacuum tubes, similar to those employed in radio sets, have been adapted to an automatic control for ele vators to bring the cars to the correct floor The tube has installed for ome time on railroad locomotives to help level. been transmit block signals into the engineer's cab in visible form, and its success as an elevator regulator lies in the fact that the plate current increases when the tube changes from an oscillating to a non-oscil- lating condition. A suitable number of the tubes are placed on each elevator car and are normally in oscillation By an vanes, the mo- floor level, is made to stop the oscillation of the arrangement of coils and tion of the car, as it approaches a MECHANICS This actuates which tubes. lays govern ( | cuits that slow up the and stop it at its corre | position. The system « } erates whenever the « is running no matter which direction | COAL IS TINTED BRIGHTLY TO TELL BRAND Spraying coal th purple paint to dist 1 . B26 guisn its quality 1s method ado pt ed | eastern compan we = “brand” its bette hade so light as ] 1 almost DINK 1 Oo! ; ; markets and tests have iown that paint rubs off only after repeated | dling. Considerable research was nece sary to obtain a coloring material would be permanent ind would no duce a mottled effect Accord company the paint doe not iftec hyo ? + muTrnin qu r e { COVER SURF PLANE WITH METAI TO KEEP OUT WATER Speed ot eighty-five miles an how claimed for a metal-covered Suri plane eastern inventor has constructed. It . ’ 1 , . made of oak, sheathed in metal to ke 1 the water trom penetrating the tram run by a 220 hor motor | plane weighs but 1,350 pounds, sept mweefr Speed Boat Built like Wingless Seaplane, for Whic! Eighty-Five Mile Speed Is Claimed

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re POPULAR MECHANICS 1001 TWO-DECK FLYING YACHT TO CARRY THIRTY-FIVE: BAGGAGE ble-Decked Airplane with r Motors, Planned for a West- Air Line; It Will Have Ac- mmodations for Thirty-Five Passengers Two decks o1 passenger mpartments, one above ‘ other compose the ief feature of a “liner the skies” planned for The flving western aviation cht will carry thirty-five passengers ; will e four motors with a combined horse ver of 1,620; the cruising radius will be () miles, and a speed of 120 to 152 miles Smoking room, space and other be provided. Passengers company hour is anticipated. iffet, large will go from one deck to another by a hort flight of stairs. There will be four heels on the front landing gear. The hip is to have two wings, the upper with eighty-five-foot spread and the lower, ixty-five feet. The gross weight of the hip will be eight tons. baggage mforts HAWAIIAN TWO-CENT STAMP IS PRIZED BY COLLECTORS Collectors are cherishing the canceled urcharged Hawaiian two-cent stamps is- ued in with the celebration of the 150th anniversary of the discovery of the islands by Capt. James Cook. The tamp is a United States two-cent impres- ion bearing the word “Hawaii” and the connection issued but LOCATION OF BVFFET Lal a STAIRS TO SMOKER ! helow. dates 1778-1928 in black print just Some 2.000.000 of the stamps have been they already are becoming n Hawaii four cents for each and scarce, and collector s were Ol- fering canceled two- cent eight cents for each five-cent stamp of the surcharged issue when this edition of Popular Mechanics Magazine went to press. GOLF SCORER WORN ON WRIST ALSO HOLDS MONEY Designed espe cially for the con venience of wom en players, a sil- ver holder, worn on the w rist, con tains a gvolf-scor ing card, a place for the pencil and at the back, space for paper money The chromium - plated. device is

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O Improve Your Voltage-Regulating Device for Protecting A. C. Tubes and Step- Down Transformers from Exces- sive Line Voltages; in Most Cities the Voltage So Varies That, at Certain Times, It Is Harmful to Such Tubes and Transformers; a Similar Device Is Shown at Left

AC ; © vous © \ \m 0

Right, to Test A. C. Tube Voltages and B-Power, a Handy -Voltmeter Is Mounted in a Standard Tube Base or Special Five-Prong Adapter; This § Meter Shows Power Loss Due to Open Circuit and Reveals Other Sources of Trouble

LEAD IN» ie }* ATS OO ) Left, Single-Stage R. F. Ampli- WIRE Oa fier or “Booster’’ Employs New sigs” Screen-Grid Tube and Is Inclosed a ' in Aluminum Shield; by Using > APREGT This Device with the Standard POUR IN Receiver, It Is Possible to Hear A WATER Signals Otherwise Inaudible with ‘ at ——- Good Volume; the Unit Is Avail- il } els able in Kit Form or Assembled ROD FOR | : | FIVE. FOOT LENGTH REWING\Fag~ OF "INCH POINT INTO GALVANIZED PIPE GROUND .s& DRAIN HOLES FOF SALTY WATER Ti MOISTEN GROUN) AROUND SCREW POINT >. | > SCREW POINT OF Turntable Designed for Installing in Radio Consoles; It Provides a Sim- ple and Efficient Means of Employ- ing the Radio Amplifier and Speaker to Reproduce the Full Tone and Vol- ume of Phonograph Records

j SPECIAL ALLOY A RUSTLESS METAL —T WITH LARGE } ~ GROUNDING j SURFAC <“ 1002

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Radio Set PIPE CLAMP . a This Audio Transformer Is a Re 4 OR WIRE, : 2 New Design Using a Solid Fe ' : Core Instead of Laminations; SHOWING / ‘ & i" the Core Is Cast from Special * 4 MOUNTING i Metal in Two Pieces, Which 5, Pa c 4 pando hy | Are d by a Single Screw A : Bnew 4 te for the Trans- Y4/ 4 SIDE WALL \ former Coil; Two Methods of Mounting Are Shown Above Collapsible Aerial Masts That Will Fit Any Roof Simplify Installation These Masts Are Built of Tubular Steel and Are Available in Both Two and Three-Section Units That Telescope to 4-Ft. Lengths; a Simple Locking Device Clamps the Exten sion at Any Desired Height, and the Ad justable Base Is Easily Fastened Either to Flat or Sloping Roofs, or at the End of the Building as Showr An Ingenious Method of Using the Well-Known Tone Quality of the Piano Sounding Board is a Radio Loud Speaker Is Shown Here: the “ Special Microphone, with Mounting Bracket, Is Supplied, and Piano Owners Need Look No Farther for a Good Loud Speaker; the Thrust Rod of the Unit Is Clamped So That It Touches the Sounding Board 1003

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By Lrank LLrittin simple tuning unit t: plugged into the detect sometime the first r.i 8) Lie set \ suitable wWhia unit was described , present set or direc nected to the ylitie | t c d ) 1 ‘) 1 re¢ LOO receiver must be elective e a Cieal iud ble vo i ufficiently advanced state to provide an distortion and good volume. Picture interesting field tor the experimenter. a sort may be received with transt \nvone having a radio receiver can easily coupled a.f. amplification, but the wide ) plified and broad« : t throu a - ether and received the ae; Oak + For television transmission, 1eX4X7 person st inds betore four o1 BAKELITE : . PANEL photo-electric ‘ iyi, me FY cells capable of responding | om ‘ i ‘ oo Varying intensities otf ig! a i — - — § ff ee 3x4 shadow and faithfully converti: HOLE them into electrical impulse ! . ; CABINET corresponding strength. A rapt revolving metal disk, perfora 25° > Ge light Sel z" ° e - SHELF. %@ _ with a series of holes arranged 93X25" ~ / spiral form and. known as t “scanner,” is located behind tl i light-sensitive cells. A powertu a are light is employed behind th

UPRIGHT — AX2K2S

34s 8 disk, and light is focused on tl STOP BLOCK 7 é subject through tl he revolvi BASE 125X275 Fis.! —t disk, with very little discomfort t

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light through the f: dividing pencils ot no The . les, play thu across , in effect, the ubject, nto horizontal of which depends on the quality ired. The shadow lines num he picture des varia- f light and e lines is ted by the lig ulting amplified along fe) receiv ed and con- ht-sensitive cells the res electrical im- transmitted the es are and ugh the ether in exactly ame for voice onal has a ve ve tuned W r\ aves. distir The televi ictive sound nat the receiving loud the \When the signal has speaker or throug been tuned in set 1 } to sudest volume, a tube filled with neon substituted for the phones or ker. This tube has the property of ling instantly to the varying signal ities and glows with a pinkish light brilliance otf which depend on the th of the signal. Immediately in of this neon tube another scanning identical with the one used at the oadcasting station and revolving at the e speed, permits the light from the he to pass through the holes in the di sk, here it reaches the eve of the observer. he revolving disk recreates the image ig the eve, in a way, as the loud peaker serves the ear. \t present practically the same system used at all stations broadcasting tele- on, the only difference being in the umber holes in the revolving disk. (he aim of this article is to give the ex- t rimenter directions for assem- television receiver that tune in on test programs. The for parts is about that for building a ndard r and be simple ing his own so may adio receiver may re uced by building up the amplifier stages tead of using the wired unit metal the rhe disk used in model is a

manutactured type en ploying three ¢ forated piral acotl bit ition Oot 24 x +8 holes | eT t ‘ é tune in on one o e ft ee ila transm - metic nov l 11s ET ‘ ‘a LINES BAKELITE si ne re hig’ te a METAL 24 BRACKET } LINES “2 ~ Y _— = re “| @\ >" BRACKET “NOTCHED AT ENDS TO FIT OVER SCREW HEADS ON CABINET 1005

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O06 POPULAR MECHANICS « SPCAKER

2no POWER TUBE

STANDARD RADIO } RECEIVER \ SW. MU-20 OR CX-340

——— FW _— — 4 DETECTOR) “S_] Ne JACK 7 — » Ee () {RECEIVER TERMINAL P CONNECTS

WATER~PIPE TO PLATE OF DETECTOR B- | OFILORAC ‘ GROUND AND & TO DETECTOR B+(90¥.) USED ONLY WHEN SV. TUBES } \ . ARE USED ON 6V BAT. WHEN ~ Lon 00000) TRANS. 1S USED SHORT CIR. BR

R-.1 MEGOHM R2-.5 MEGOHM i» ai Ri- tL. R3-.25 ° Ci~CBAT.I%V. C2=C BAT. VOLTAGE DEPENDS ON TYPE OF TUBE AND B-VOLIAGE cl ( the othe pa remaining prac- Fig Ys | C ocKet t e ¢ a least ¢ r e time lite disk ¢ ‘ to ¢ é Ce ) re ement ( ne re pro u ] 1 ( | ( ¢ te ] I e DrackKe LO i \ it r »ente i no 1 urle | ut ‘ 1 1 ¢ mes re T ron) operator to hice T t_<«] ] ] ] , 1 t;] if liy presen ( eley ) ) ao nN In It ( ‘ 1 1 rece on e picture f 1 c thethree holes cu ¢ ] | l 1 ( vv cde i t 1} soc} e ( Tl fe it é ) ( Zt r ) tele e piate o Tl 1 é r | é ( € eC OpDs¢E 11 1 1 } ‘ he Bi ( Tro i ci¢ ID OT t 1) ( t r ‘ ¢ ment whe cente , ry 1 1 eS « et ‘ the teievision re phe adyu ¢ 1 : ) ' celve i. 3-11 poplar I} hs 11l@ Wie ‘ : as ood or five pane stock being bras trip 1 ( ed mughout a nished du hlacl ush wit thre eric ( Mor LrTro ic] Lie ec th yu let can ¢€ ( 1 P ‘ the iplest ediu to use mack of the hood n 1 { I , ] e a L tive I pro le ¢ acce thin The he 1 1 pend on the tvpe 17 well to ha it s , ind then bu ¢ t to ce tt by board shims means of card under the motor, which is then screwed to the shelf. The neon tube thove the motorand directly disk an behind the is mounted on adjustable bracket-an d-socket

arrangement to the he cabinet crewed top The details are given in Ot t Television Receiver with Disk Removed, to Show the Instrument Arrangement

CONNECT B-TO F OF THIRD STAGE “= A.C.IS USED ON FIL. CONNECT T CENTER TAP OF TRANSFORMER BR- FIL. BALLAST Fic.3 1 mounted on <% onter ch r { ) the ¢ ( T e d sccemh net P ¢ Nit ) mp lp ect ( | eithe é ! tr De ‘ s | urned so a ; t 11 t he i ¢ tiihe ( Lie bracket « al € ic] r | ma 11? = «Dp t 1 i@ aroul | ¢ ior the mote ( oO wd heostat ne | le al b Ke te 1) t] le oT the ea ketel Che re ance coupled al pliner may be of t tour three or Sta tvpe, either a read) built unit, as built up single-stage units show or from These units contain the n ing condensers and resistors. When thi three-stage ampli fi audio -cessarv block er is employed, the amplifier of

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POPULAR MECHANICS 1007 ¢ not in use 1 | ihe output of the detector tubs dire into the amplifier. If there is no detecto me r fea he = 1] » ‘ - | ™ yey n the receiver, install one. Run a flexible in u a \ . ire trom the plate post on the detector-tubs N\ et to the upper blade of the jack, then run a lead " heeene , . ‘ * ' i ny | the detector B Supply post in the set to the lowe: | ‘ ¥ le of the jacl Use a single open-circuit k, and a | | Dona > ot ack, a ng pen-circuit jack, and a ' ij y £ ard horn plug tor the input ' INI to the ampliher unit, a order to obtain greater illu- illo! trom the neon tube. two er tubes may be used in mul- a shown in the diagram power tubes mav be MU-6 o1 pe lesired. Battery oper- tubes of the MU-20. or sim- pe are use tor the first

econd amplifier stages. Raw I be used on the filaments e power tubes if desired, and ed for best results, c. must not be -mployed for Completed Television Re 7 sg Me wing the C Disk two stage ’ f a resistance-coupled amplit 1S the dis} rr t ( t ‘ ai oved, as in t case, it W be neces- turn it ‘ ] raise the detector B-voltage in the \ if 1 et to an approximate value o construc f 467 olts< 1 - , , ~ /peration, as the disk approaches crit- obtained fro) Yopular Mec Oo peed. tlashes will be throw? across dey irtment for 15 « toc ( ind finall strange figure acl Sry bli No 1 No pear until the speed of the receiv- charee | ( Oo lisk matches or is synchronized with used in the el. ; ( oO t ot the disk at the transmitter. When anv addres re P ( the hronous speed is reached by adjusting March. 1928 issue S t- eostat, the picture will make its ap Wave Adaptet cle F ance, and will remain as long as the able fe those é ire j tep present s¢ ‘ P ent e push-button switch shunted across — e rheostat j used only for the purpose , ‘ ; ™ : f of ar Bi ae TA hn Improving the Tone of Old Sets ( Ort-circuiting the resistance thereby eeding up. the motor momentarily in Although there nothing ne ler to make it run at the same rate a hunting the second é the transmitter motor and keep in step former with a variable re ith it, that is, to svnchronize the two. prove tone qual ¢ le i For test ne purposes, the operator may tage of the idea The best ( 1] { employ a phonograph and magnetic pick place a proper resistances the se Pp connected directly to the amplifier unit ondary of the second af, transforme il he regular musical record will then possibly across the secondary of the first row a geometrical design on the revolv- as well, although it may cause a slight lo ¢ disk of volume. Just what value of resistance When receiving actual pictures, the op- to use is difficult to state. a depend erator may be puzzled to find his received on conditions in the circuit he range ncture upside down. but this mav be easily mav be anvwhere from 50.000 to 200 000 corrected. It is only necessary to remove ohms, and in some cases even high

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L008 POPULAR MECHANICS Increasing Range of Voltmeter the proper re

-O-6 VOLTMETER re occa SCREW tne circu t the needle rea olt ft 1 6 lb yout 1 il et ( cre n panel. « e ¢ po ] n 1)< - end lor ¢ 17 WC ’ connect » #34-36 SILK COVERED vill come MAGNET WIRE O = 4 = : BINDING Screen SS POSTS re J t and \ D Right, Details of pe e 1 Re ( eted V ete é e 7 1 ( é ¢ ( ¢ Mmpe¢ ce to oO } ) fy) ) { t , ‘ on : ( ( 1 yl € “- ¢ ‘ ( t | t t { é ) i é ) yf ] 1 1 to QO to 50 | ( e base ‘ ( ) i) « 7 + ‘ e ¢ ) é ete nm I € Ty¢ é } ( ( ] . Ki easel 11 é ¢ ( e 1 1) up I ce re é \ co »] r =< YT! ¢ h f } . ieé t Te cee \rra e Tf eC b d | ost oO ( e 1 ive post of he ne 1 Oo ) post marked 0. A wire in from the positive side of the met to the cente1 binding post marked 6. Che resistance unit ound on a strip of bakelite o1 fiber, 1 in. wide and 4 in. long. Drill a small hole in each end of the strip, and ‘ . ° ‘ Pad Ce ’ place a shoe eyelet or tubular rivet in each hole. A laver of eithe No. 34 or No. 36 s.c. copper m ionert wire is then wound on the strip, the beginning end of the wire being soldered to one of the rivets. When the first laver is wound, reverse the direc- tion of the winding and run the second layer back over the first, and so on until af

pie t iown P ‘ TQ ) t é Place the if ] neth 8) bu ire d, hold to the upper e1 the wire, pl ice other end oO t machine crew shown. Then lease the nut an: ill slide down a position where may be started

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POPULAR ing it with another piece of wire, a v-shanked screwdriver or a nut drive fenri T. Schultze, Kansas City, Mo. Testing Batteries and Power Units Vhen testing batteries with the usual tmeter, the battery should be connected the set and tested while the set is in eration to obtain the true reading.under d. Batteries will frequently test up to | voltage when not connected to the set, it, when connected under operating con ons, may show insufficient power. This o applies to socket-power units which ould be tested under operating condi- ns, and in this case an accurate high- stance B-eliminator voltmeter should employed. Wire Holder Simplifies Soldering Many tedious soldering operations may simplified by means of a wire holder sisting of rks and a block of wood, two large The corks are ooden block with glue. through the two thumbtacks. tened to the mall nails are driven ck. The thumbtacks hold the work in the desired po- sition, leaving both hands free. This simple holder is also handy for soldering delicate in- RKS GLUED strument TO BLOCK parts that must be hard- soldered by means of a small pipe.—Jno. H. Schalek Swissvale, Pa. blow- eee, SMALL LATH NAILS Homemade Line-Voltage Control Very few a.c. receivers are provided with means of limiting the line voltage ap- | to the tubes. letrimental to a.c formers, Excessive line voltage tubes and step-down and the simple device de- bed here, which will cut down exces- voltage, will be found worth while. MECHANICS 1009 Making Resistance Unit for Limiting Line Voltage Sup lied to Receivers Using A. C pool of No. 22 nichrome resistance wire: these spools may be ob tained from anv electrical-suppl\ suse he wire ic wu ypnad 1) 1 Te ie wire is wound on piece ot D ¢ } ick, about 1 ft. long. the length of wire - 1 ' ‘ : required depending on the amount the line = 1 7 oitace to be redu ec] \ 1 of elec- trical friction tape and an a.c. voltmeter + scaled to read from }to 150 volts are also required. Wind a length of tape around the broomstick and tasten the starting end of the wire under a tack Place the tt about “32 in. apart and, when about three fourths of the stick is filled, connect the resistance in one side of the supply line and test the voltage at the power-unit put Now, either add or remove turns ot wire until the reading is not in excess ot 110 volts. When the correct length ot wire is determined, clip it from the spool and secure the end with a tack as at the start. An inch or two should be left at each end for connect ng in the line and a turn or two around the tack will hold the coil in place. A laver of tape is now wound over the coil to prevent shorts, and the resi ce unit is ready to connect in one side ot the supplv line: Fahnestock clips may be used for the connections. As the line voltages vary during the day and at night, before winding the resistance unit. determine with the voltmeter just when the peak is reached and wind the re sistance when the line voltage is highest.— F. W. Luecker, Jr.. 9BBX X, Milwaukee, Wisconsin,

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An Overstuffed Chair Affords a Good Hiding Place for an Indoor Antenna; the Cloth Cover Is Removed and the Wire Strung over Insulated Tacks; It Terminates in a Clip Connector A Copper-Screen Antenna In- stalled, and, Right, Details of Its Construction Right, Useful as Well as Orna- mental, This O dd-Appearing Trellis Is an Ef- ficient Antenna Consisting of One Continuous Insulated Wire Formed in Loops on a Wooden Frame, and Lo- cated under the Window near Which the Re- ceiver Is In- stalled REMOVE VIBRATOR CONTACTS, FORD COIL 4 RADIO SET BASEBOARD ENDS OF SCREEN SOLDERED TO LEAD-IN WIRE COPPER SCREEN--~ ~~, WOODEN : DISKS ~. ~e! 32” HOLES FOR .~” PIPE OR ROD~_ WOODEN DISKS ~_ LEAD-IN WIRE ~~. Left, an Output Filter Made from a Ford Coil Protects the Loud-Speaker Winding from High-Voltage Direct Current and Improves the Tone of the Set; the Vibrator Contacts Are Removed and the Coil Is Then Wired as Shown AERIAL--- | RUBBER BELTING When and Ground Lead-In Strips Are Employed, Antenna the Sash Will Rarely Exclude Cold Air and Dust; a Tight Fit May Be Secured by the Use of Rubber Beiting or Strips of Felt Tacked to the Sill as Shown 1010

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Left, an Inexpensive Means of Modernizing an Old Radio Installation; the Curtains Hide the Batteries and Protect the Set from Dust Right, Home- made Remote- oa Control Box Consisting of a Variable High Resistance Pro- wx vides a Handy Means for Regu- lating Volume A Single Phone Unit, Connected to an Old Tube Base Plugged into the Detector Socket, Makes a Simple Broad- sting Device; Con- ting the Plug to the Speaker Terminals, Room Conversa- ns Are Picked by the Speaker —— VOLUME __ CONTROL i May Be Heard an Adjoining ym with Head- phones Extended m the Speaker Jack in the Set } ROADCASTING THE HOME oF = DEVICE FLEXIBLE WIRE --- = — = ' —= == “LEAD ROD Vg" FROM ‘Y LATES/ TOP OF P 3.8 -VOLT . O BATTERY mune ; mT | HANniN . TO BATTERY ii ; TM TS | ~WOODEN BLOCK THE DETECTIVE ARRANGEMENT Right, When Necessary to Re- move the Dia- phragm from a Phone Unit, Slip It Off as Shown, Don’t Pull It; These Disks Are Thin and Must Be Handled Carefully Left, a Simple Water-Level Indicator; When the Lamp Is Pushed Down to Make Contact with the Screw Head Below, It Will Light If the Electrolyte Is High Enough to Touch the Lead

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1012 POPULAR MECHANICS . bi aanlaaies | . } i — itt GE WOODEN | rf UPRIGHT }/ ocuel G | coe [tac TYPICAL MOUNTING A CYLINDRICAL MOUNTING COIL MOUNTING A VERTICAL MOUNTING | Pe Saee COIL HORIZONTALLY VERTICALLY BASKET-WEAVE COIL FOR HONEYCOMB COIL MOUNTING FOR ONE - HOLE TYPE RHEOSTAT O O + TWO-HOLE MOUNT FOR CONDENSERS OR RHEOSTATS = MOUNTING FOR JACK ONE-HOLE MOUNTING FOR VARIABLE COND VERTICAL MOUNT FOR FIXED CONDENSER f ——, MOUNTING FOR GRIDLEAK ae Inexpensive Angle Brackets, Preferably Made oo of Brass Strip, Provide the Experimenter with ~j a Handy Mounting for Various Radio Instru- ments without the Use of Panels; These An- WOODEN gles May Be Purchased, or the Experimenter PIN Can Make Them in Various Sizes to Suit the Work in Hand = TO REGULAR Fr RECEIVER ) se cS — ey, i SS Ni i 4 i = BRISTOL "0 ol sD gine AL BOARD | ~~ : PON | —_ s UL. rons = : F i WOODEN STRIP EARPHONE. | An Improvised Loud Speaker Built from Odds and Ends by a Canadian Camping Party, So That All Could Listen In without Passing around the One and Only Earphone A i Steen Method of Shifting Antenna and Ground Connections Wher Testing Sets; Left, Two Spring Clips Bolted To gether as Shown Form a Handy Soldering Vise

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The Latest in ‘Television Apparatus ere FN. bove, Left, John Gelso, of the Pilot Electric Mfg. Co., Adjust ing His Complete Television Re- iver and Observing a Test Pic- ture; Right, Rear View Showing the Arrange the Apparatus Philo T. Farnsworth, Young Utah Inventor, Who Has Been Working a Laboratory at San Francisco, Demonstrating His Newly Developed Tube and System of Television, In- lving Two Fundamentally: New Principles; His Apparatus Is Unique That There Are No Moving Parts nd That It Requires Only Half the Wave-Band Length Used in Other Methods of Television one poiiinaalal —_ re

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1014 POPULAR * j ‘ /f Details of Support for Reducing Noise of Operation, Showing Charger in Position Reducing Charger Noises Radio owners who have battery charg- ers of the older types, some of which are quite noisy, may reduce the noise and vi bration means of the simple arrangement shown in the sketch. The charger j rubber cut to a minimum by is suspended an old auto inner tube, the strips being nailed one on top of the other between the two sidepieces of the simple on strips of from wooden frame and forming an elastic sling or cradle. The frame itself is further insulated by means of rubber feet, which may be made from rubber stoppers. This device prevents the vibrations from reaching the floor or table on which the charger rests. A slight hum may still be heard, but the vibrations are not amplified. —Benjamin H, Hoopes, East Berlin, Pa. Pin Jacks Simplify Connections The ordinary binding posts used for bat- tery, speaker, ground and antenna connec- tions are often placed in awkward posi- tions for making quick hookups. The holes in the binding posts through which the wire is to be threaded are out of sight and at right angles to the post, making connections very difficult. There are sev- eral types of small pin jacks on the market that make ideal substitutes for posts under such conditions binding The wire ends may be provided either with cord tips MECHANICS or special miniature plugs which are i serted in the small jacks. may also be mounted on the front and connected These ja pane points where cur rent or voltage is to be checked. across R. F. Chokes Prevent Distortion When properly used, a good r.f. choke coil will prevent distortion resulting fro: the coupling of separate circuits, reduc: undesirable regeneration or oscillation an prevent the entry of r.f. currents into a circuits. The use of these chokes reduc: the necessity for shielding and for the extreme care otherwise essential in pla Good values di if improperly made the more as condensers than choke and will permit the r.f. currents to pa freely, the purpose intende The extremely low capacity values of goo chokes the r.f. type are sufficient t block the path of the r.f. currents, and divert them through the densers as intended. ing parts to avoid coupling effects r.f. chokes have tributed capacity will act very low of defeating of Col by-pass Mounting Loop on Portable Set Mounting a loop on a portable receive: so that it will be held securely in an up right position and at tl same time permit turnin; in any direction present a problem for many ex perimenters. The shows a sketcl sim ple means ol doing thi and the secret ao ~ lies in the uss of an ordinat - 1 toop enn| oor-bol of REDUCED keeper that 1 “ ri screwed to the oecameaiel side of the RADIO case. Keepe! ¢ CASE j may be ob “DOOR BOLT tained fro KEEPER —— J any hardware store for a fev diagram the The method so clearly that little comment | cents. inset shows necessary. The keeper is so shaped that no parts project above the case,

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Stage Scenes from Vacation Pictures By PAUL PADDOCK | YOUR summer's outing has been mountains or diminishing groups of trees normally successiul, you probably have is favored, as it gives the impression of na picture or two that are worth pre- distance. A hazy sky in the far distance ng. An interesting and unusual way also will add much to the effectiveness of lo this is to make a scenic setting out the finished group. hem, after the manner of a model stage The actors in the scene, of course, are uping the persons who appear in the picture. The he main view (if it is an outdoor scene, figures should be cut out in outline, also all the better) will serve mounted on stiff board or wood, and an- as the back drop. One chored toa base of wood or cardboard so showing good perspective that they will not fall down. Do not at- is most satisfactory, as tach them permanently to the bottom of the effect of depth is one your stage, as you will want to move them ofthe pleasing about from time to time. The figures results of the may be enlarged or reduced as you need, setting. The to keep the proper perspective; placing picture should them close to the front or nearer the back ve, Cutting Out the Prints the Setting; Right, the Partly Completed Layout 1iounted on stiff card- ard and fastened to a ubstantial backing, so it it will stand erect nd not easily become lodged. Care should e taken that no wrinkles ow. A background that cludes a river, distant

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1016 POPULAR of your setting will sometimes give the right result. Attaining the proper portions and perspective is a problem that must be worked out for each picture and will afford added interest. T P - pro The scene may be made from one pho- tograph or from several, and if you have in mind the making of the setting when vou take the picture, be figures may Sand, a Bit of Looking Glass and a Few Small Pebbles Form a Realistic Foreground; Upper Right, the Permanent Setting grouped properly at tl time, and you can have as many prints made as are necessary for the outs in the setting. 1e cut It also necessary, of course, to take one picture of the background with no figures appearing on it. 1S 3y coloring the pictures and adding real istic foregrounds of sand, bits of grass or other materials, the assume a much more lifelike appearance. When the scene is completed, it may be assembled in a box or booth, and interesting lighting effects produced by placing small bulbs back of the units or at the footlights, as is done in actual stage displays. Sun and moon effects may be attained by lights behind the back drop. The group illustrated here was com- pleted in less than an hour after the prints settings MECHANICS SMALL LIGHT BULB ~ FOR MOON had been made, and three pictures were used in its arrangement. Preheating Water for Gas Heater Reduces Gas Bill In many homes one-half of the gas bill represents heat used for warming water. One type of heater is automatically turned on when the corresponding faucet opened, thus providing hot water only in such quantities as desired. The water en- tering the heater is practically the s*me temperature as that in the outside main is

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( enough he bottom to the ictly half of its full measure. POPULAR h is often many degrees lower than Even though water passes through 50 ft. more ipe in the its way to the ter, it moves at such velocity that it not have time to heat up appreciably re reaching the heater. Quite a bit s can be saved if the water is allowed reach the temperature of the house be- it enters the heater. This can be ne by installing a tank in the line to the ter, or by using oversize pipe for the in order to iir inside of the house. or house on provide water-storage ce. The tank should be large enough old the average amount of water re- red at time. The cold-water hould be located at the bottom of tank and the outlet to the heater at the Supposing that water is required at F., and during the winter time it the house at an average temperature any one 10°. The cold water would then have 9) installing a tank the water in the tank would dually attain the house temperature of ut 70 the flame would e to heat the water only 60 It is ob- us that much more gas is required to it the 90° than 60 method of preheating water reduced e average monthly bill from about $9 to -C. C. Phelps, Montclair, N. J. be heated By uggested Chen gas water In one case Measuring Half Capacity of Containers lt often happens that housewives and thers who measure ingredients do not ave half measures, and are then tempted guess. The quantity of any container exactly ilved by proceed- an be as shown in e drawing. erely pour of the other out until quid or ntents e surface ex nds diagonally om one side of side of e top. The quan- ty of liquid in the container is then ex Stanley H. pposite hillips, Drummondville, Can, MECHANICS 1017 Convenient Arrangement for Hoisting Sagging Clothes lines Out of the Way Hoist for the Clotheslines In our backyard we had several clothes lines which sagged and were theretore more or less in the way especially when st them entire long centet lo nol mowing the lawn. out of the way, I provided a pole with an iron ring and pulley a rhe were attached to the ring, whic shown. ends of four clothesline h could be raised or lowered at will by means of a length of rope attached to it and run over the pulley attached at the top of the pole The other ends of the clotheslines permanently fastened to post vere or buildings. Besides clearing the backyard of sagging lines, this arrange props.— W. H Snvdet nent also eliminates Pocatello, Idaho. Can You Do It? In the article under the above title in the August issue of the magazine, an error appeared in the key numbers of the dice game. The proper key numbers are: 8, 15, 22, 29, 36, 43 and 50. These can easily memorized if it is that they are the number seven and its multi be remembered ples, plus one.

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1018 POPULAR MECHANICS somewhat rough road, the supports oc sionally touch the tires and slash the To avoid this trouble, simple shields be made to fit on the brackets. The i tration shows two types, both of wl can be made from lengths of flat The shield in the upper detail is attacl to the underside of the fender brack« while the lower detail shows a shield tached to the side of the bracket. \ Splicing Ends of Short Wires A quick and neat method of splicing electric cord, especially at a point wh it is rather short, as in motors and fai Helical Spring to cut a 34-in. length of No. 14 solid- Slipped over Wood , : Auger Prevents It per wire, and wrap the cleaned strand from Running the cord around it, after which the tl Spring Prevents Auger from Running pieces are carefully soldered together *n Wet Wood the repaired part is subject to strain ends of the solid wire should be bent o Wet and sappy wood, especially soft with a pair of pliers just before solder wood, tends to draw an auger into it much then taped in the usual way. faster than the guide screw does ordi narily. This-trouble, known as “running,” ; a. alin Homemade Brush for Applying Tar can be prevented by slipping a_ helical spring over the auger as shown, the small For tarring a roof, which was so sm end of the spring being of such size that that [ did not feel justified in purcha it will not slip over the chuck. This exerts a regular brush, . “ | CLAMP. _— GARDEN HOE a back pressure on the auger, permitting I made one a it to feed slowly as it should. Helical which answered springs for this purpose can be found in — the purpose just discarded auto seats as well. It con- sisted of an old paintbrush, a garden hoe and After changing to balloon or oversize asmall C-clamp, tires, many auto owners find that the pro- the latter hold- Shields for Balloon or Oversize Tires ~~LARGE jecting nuts ing the brush oaaet Gamer onfendersup- securely to the ports cut the hoe, as shown. This improvisation was , FENDER tires under sembled in a few moments.—Paul Kiete certain cir- Hamilton, Ohio cumstances. For instance White Paint for Concrete when the car is heavily A durable white paint for concrete ste] loaded. the walls and walks can be made from fenders are and cement. Take hydrated lime, t brought down parts, and cement, one part; mix the close to the together thoroughly and scald with b: surface of the ing water. If a very white finish is d tires. Then, sired, use white cement It is apph when travel- with a large paintbrush and forms a coa ing over a_ ing that will not rub off.

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Make Your. Own _ CHRISTMA DECORATION S? bates XS

VY eee inexpensive Christmas-tree this band around the egg. paste narré

table ornaments of almost inf trips, 1% in. long, on eat iriety can be purchased during the tick a 2-in. paper tassel to the egg point day season, many folks like to give Complete the trinket by pasting colores nal and personal touches to the dec- string to the upper end ions To such people these sugges- The other tailed-shel!l ornament made are addressed by drawing four equal ed oval ort Kegshell ornaments are illustrated in ments on the sur c e edge 1. Make small openings in the eggs slightly overlapping Paint the space d blow out the contents. Draw a pen- above and below the ovals bright red, the line around a oval emer! | vTeey) ll a little below ‘ light blue. and center, the large the small elliptic being at the oval vit n the nd gild the up othe d The top, shaking pape pen t Christmas “ice” also gilde¢ der over the ihe t é while still wet. uid out ket t the lower end e¢ tal carlet water piral ‘ t r or lacquer ene g. | it a strip ol geold I e ilver paper, | in. to do. I e color long enough use é ANS] go around the ent, ¢ se the Talse : oy at the division e with a little lap d it into an ac- and gold \ large variety ol lion pleat, and rnament cal re the folds with ‘Ors to make a nev border. Glue made with walnut 2 mY / : “ ) shells, by gluing the <= . ~ ~ Wey . halves to papel 1019

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1020 POPULAR MECHANICS FLOWER DETAILS GE » cy co 9 — |\ \ win bh > ; ‘va |~ \ KEY—— ++ ---- \ : ; ; ‘ FOLD UP________ comes! \ backings Of various grace i rvcntens i ee Oe a es... -..... \ shapes, as in Fig. 3 ' “4 dt . y Nei Flower decorations are esp t ‘ i : . : , ~ \ - cially attractive for the Christ: ‘ij \ .° AS ,—4 % 6 | tree. (See Figs. 4 to 9.) Cut tv . ol ~~ 15 | . | . . ks Se Se circles 24% in. in diametet | F ' ; " | aed Nt a hy i I colored paper (Fig. +) and a t ! — kK \ i J : , a : ” vide them into twelve equal part - — ef +4 | 3 C ' ; 6) ut the petals in. deep i e) . the upper left. Make a third ti of petals 2 in. in diameter, cut a | _ ting the petals ve in, deep. Not , a= J r the petal ends \% in. deep, and a | | semble the three papers by stitcl 5 | - | ing the centers. Add the stamet in the form of a paper fringe | | / in, wide, rolled into a tassel. Bet the petals upward, and the flow @) , is complete.

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POPULAR MECHANICS 1021 igs. 5,6, 7, and 10 illustrate ornaments [ 7 modern design. The center device in e photograph is made by pasting to- ther four of the cardboard cut-outs di- ensioned in Fig. 5. The other angular nament is built up of the two triangles own in Fig. 6. Cut as indicated, folding e points upward he dotted lines + | downward on the hes. lhe circle ornament built up of nine %4- circles made by lap ng the ends of col- | fe me / fl HORIZONTAL TYPE TREE i i. t PLACECARDS ~ | 1 - 27 > ored paper strips, 4 in. wide. Glue up two sets of three W i rcles each, and join them with a circle glued in the t £ ‘3 7 ™ enter, as in Fig. 7. Paste the other two circles to the VERTICAL TYPE TREE PLACE CARD

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1022 POPULAR ends, and lay aside to dry before tying on the string. Two interesting place-card favors for the Christmas table are pictured ‘in Fig. 13. One miniature tree is made by thread- ing six-pointed star forms over a splinter of wood, 314 in. long, as in Fig. 12. Ob- serve the variation in diameter and spac- ing. A stand. section of cork makes a good Make the place cards themselves wide and with the ends cut on an angle, one being slitted to clamp Yin. 3 in. long, on the tree trunk. The other tree is a vertical type. Make three triangular forms, 234 by 3% in., and stitch them to- gether up the center. Fold the layers radially outward, so as to form the six sets of leaves, glue or sew to a stick for a trunk, and add the base. Repairing Small Cracks in Earthenware that are cracked so that they will not hold water, but are Earthenware vessels otherwise in good condition, can readily be repaired in the following way: Get some black iron enamel after the vessel has been thoroughly dried so that no moisture remains in the cracks, apply some Of the enamel with your finger, rub- bing it well into these. and, After repeating this three or four times, remove the excess enamel with a rag dampened with gaso- MECHANICS dried, the For larg cracks, it is better to apply the enamel wit! a brush, applying three coats and permit ting each coat to dry thoroughly. When pottery becomes covered on the _ inside with a deposit that will not readily come off, such as the After the enamel has vessel will again be water-tight. line. white residue of water glass, apply a few coats of the enamel. Emergency Methods of Opening Bottles and Cans When a corkscrew or can opener is not available, the illustrated methods of open ing bottles and cans will be found con venient. To remove a stubborn cork, get a short length of wire, about %g¢ in. thicl and bend it to the shape shown, wrapping one end around a asahandle. Tin cans can be easily opened without any risk of cutting one’s hand by means of the improvised cutter shown in the lower detail. It con- sists of a short piece of flat wood with a nail driven through it at one end to serve as a pivot. A slot is cut in the wood so that a pocketknife can be in- serted in the position shown. The nail is pressed down through the center of the top of the can, and the knife blade through the top near the edge. Then, by turning the de- vice, the top will be slashed open. short stick, which serve =) A — 4 Homemade Stove Polish Put into a bottle one-half cupful of pul- verized graphite, 1 pt. of turpentine, one Shake up well and apply with a cloth or brush, being sure to get plenty of the graphite on the cloth. Then polish with a clean cloth. teaspoonful of sugar, and mix.

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POPULAR Spanish Windlass Pulls Auto Out of Mud though principally used for felling a Spanish windlass, which exerts rendous power, may be put to a va- of uses, among them to pull an auto mud Hitched to a con- ent tree or deadman, one can easily ( ota hole. the auto out single-handed, as shown the drawing. All the equipment nec- consists of two lengths of ( ary

~~ Ne, rey a ERP

MECHANICS 1023 one %-in. brass compression bib, one 1 by Y4-in. galvanized reducing elbow, and the necessary %-in. galvanized tees, elbows, nipples and pipe, according to the number of founts and their spacing. The drawing

When Your Auto Is Stuck in the Mud and There Is No Help Available, You Can Pull It Out Single-Handed by the Use of This Spanish Windlass rope and two stout poles. One of e latter is set up vertically so that it is ree to turn, and is braced by a length of ve tied to a near-by tree or stump as hown. The other rope is tied to the car nd to the end of the second pole, which used to wind the rope around the ver- As this is free to rn, there will be no appreciable friction the rope on this pole and practically he whole force will be used in pulling the car—P. A. Smith, Jennings Lodge, Oreg. tical pole as a fulcrum. Convenient Poultry Fountain Besides automatically supplying several drinking cups, the poultry fountain shown n the drawing has some advantages ovet hose of the usual type. There is little ince of the cups running dry, which ould cause suffering and loss of produc- especially during hot weather, baby chicks can use them without any langer of drowning. Owing to their size ey cannot be contaminated easily, and in be cleaned with little trouble by opening and closing two valves. Get a 50- il. barrel, made for holding liquid, and ean it out thoroughly. The pipe and fit- / tings needed are three 4-in. brass valves, and ec]

shows the method of installing this foun- tain. <A is the brass compression bib, while B, C and D are brass valves. The founts, no matter how many there are, that the water level will be equal in all of them. To fill the valve C must be at the same height so ] barrel with water, close the and open bib A, which allows the air in the barrel to rush out while water and D When the water starts flowing out of the bib, the barrel is full Valve D and bib A are then Drinking water is now available at all the founts. is replacing it. Open valves B clos ed

| ——_—— = #] + ——) « SUPPLY LINE-* — wis — Automatic Poultry Fountain Which Has Advantages over Those of the Usual Type

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1024 POPULAR

| CEMENT ON | GALVANIZED- | IRON SHEET

SUPPORT

<= Se — . 4 = 5S Use of Drain Tile for Chimney Prevents Rusting of Stovepipe Tile Chimney through Roof. Saves Stovepipe from Rusting When a_ stovepipe chimney its run through the roof, the action of rain and of the gases of combustion soon causes the pipe to rust through, making it necessary to go to the trouble and expense of renew- ing it nearly every season. However, by substituting a tile chimney, as shown in the drawing, the trouble can be eliminated. A suitable shelf is first built to support the tile, which consist of a tee and one or more lengths of 4-in. drain. The tee rests on the supporting shelf as indicated in the detail, and a quantity of sand is thrown inside of it to form a 3 or 4-in. layer on the shelf. This serves the double purpose of protecting the board from fire, and absorbing rain water that may run down inside. The hole in the roof through which the chimney projects should be about 4 in. larger in diameter than the tile, and the clearance around the pipe is covered with a sheet of galvanized iron, cut to fit the tile. Iron lath, or even wire netting, will do, if it is well covered with cement, some pitch being poured over the top of the latter to make the joint leak- proof. Some sand or gravel may be sprin kled over the pitch while it is still soft. NTMI ==, MECHANICS One or more lengths of straight tile cemented on top of the t ee to raise chimney to any desired height. The sto pipe is fitted to the tee, stove is not in use, it is to plug the chimney.—D. Bronte, Can. and when of advant F. McKin Ridding Pets of Vermin To effectively rid your pets of verm fix a draw string around the open end a 25-lb. sugar sack for cats, ora 50-lb. Sa for dogs, and put a handful of Dalmatia powder in the sack. Then put the anin inside with the head projecting outsid and draw the string up t » close the b around its neck. The animal will strug to get out and in doing so will cause tl powder to sift through oughly, which is exactly wh the hair tho at is desired. | this way the powder will be applied wit out wasting any of it and without getti: it in the eyes of the animal, which wou cause more or less discomfort.—H. A. N rell, Augusta, Ga. Oil Lamp Heats Soldering Iron Where an electric soldering iron is available or cannot be used, good resu will be obtained with an ordinary roun wick, center-draft oil lamp for heating A tin chimney, about 4 in. long, is subst tuted for the regular glass chimney ai the soldering iron is placed on it. Befo using the iron, wipe it off on a rag as tl

Ae ay” along very well with this N. Swenson, Harris, Minn. flame wi cover it wit soot. Th method better tha placing the iron in stove, whi heats it to much an burns off tl tin on the su face. Wit! two smal irons heate alternatel one can gt outfit.—Sixt

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POPULAR MECHANICS 1025 haping Sail of a Model Ship e appearance of wind-filled is been variously obtained p-model builders, copper or ron wire, sewed in the edges e sail, frequently being used etain the desired curves. etimes sheet metal, or even has been used in place of for the sails. However, all e methods are rather unsat- tory. I have found that ex- t results can be attained in following wav: Cut the sails ully to shape from lightweight CAC hed cloth. allowing a IQ- each edge for hem- 7 ; he edges twice and Frozen Water Pipes Thawed Out by Steam Admitted through ‘ se z* Small Hole Drilled in Floor them vith close. short es With a well-heated iron, press Thawing Out Frozen Water Pipes intil it is flat. Now bend the sai ird and suspend it horizontally a During a freezing spell some of tl \ sheet ot waxed paper is then vater pipes between the joists ot 1 smoot! ly on the surface of the sail. home were frozen and n order to tha s, pour sufficient fine sand to them out it seemed necessarv to take 1 he sail to bulge as desired The sail some otf the flooring In order to avoid e made to assume almost any shape this, I thought of the method illustrated ¢ the most sand where the deep- and found it entirely successful ‘\ hole bulge is required. Next, apply liber- was drilled in the floor over the pipes to » the underside of the sail a coat of admit a length of rubber tubing, which vhite shellac. After an hour or two was in turn slipped over the spout of a a second coat The waxed paper kerosene can. After the can was halt will prevent filled with water, it was set on two bricks the sand from al d 1e flame of a hlowtorcl d recte ] adherin y to Linst t to po the ite! é te 1 the upper sur- en off goes throu he rubber tul face ot the ind tt ke the pine yl} ch t the il After the out ina vert nie ( \\ H t shellac has Corrv, Pa dried thor- oughly ( Remedy for Floors That Squeak e sand and the waxed paper. Ap- . 1: , ear : squeak g vo coats of shellac on the inside ot , \| | . = ‘ I oOors ate ‘ When the shellac has hardened iil , 1 Y : 8 er oiten 1 tne \ 4 Lil W ve found surprisingly stiff and ma ae 1: E inno r, A ith The white shellac does not alter : Pend ; : “i emedy to reciably the color of the cloth. Sails, ] ] . a e (i 1 | ood le in this way more than three vear ‘ ; : ‘ . Screws r¢€ , have retained their shape exactly to ; ; P ‘ i - . tween the ad lav.—Carleton Goff, East Providence, i ated joining ends ode Island WOOD SCREW OR = of the boards ail WOODEN PLUG —t re is shown. If no screws are at hand, use @ Many people use a little turpentine and mall wooden plug ither way will stop rm water for cleaning varnished wood- the squeak at once. Coat the plugs with and furniture. glue before driving them in.

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1026 POPULAR Protecting Lacquer Finish on Auto Sheet- Metal Alcohol Shield Radiator on Prevents Lacquered Finish over Solution Spilling Lacquer finishes are especially suscep tible to alcohol spotting and theretore when filling radiators with anti-freeze mixtures containing alcohol, one should prevent the splashing or dripping of the mixture finish. A simple guard, which will prevent such spotting is shown It of a flat, 1 clined metal shield, about 1 ft. square. to on the in the drawing. consists in- The rear edge is bent rest on the engine hood as indicated. A sheet-metal cone o1 cvlinder is soldered to the shield below a hole cut in the center, the cone extending of the radiator If any of the liquid is spilled or splashed it into the filler opening is caught by the guard and drips off the lower edge without touching the lacquered G. A. Luers, Washingt Dd. 4 surface.— on Calculating Number of Studs Required in a Wall lo calculate the number of studs, rafters or joists required when spaced 106 in., cen- ter to center, divide the length of the wall by four and multiply by three. joists add one to the result. In case of With rafters for the common type of plain gable roof, multiply the result by two and add two, which gives twice as many rafters as joists, MECHANICS as the former are used in pairs. For st add two to the result, because two are 1 to make a corner with which to start example, if a wall is 20 ft. long there have to be 17 studs, 16 joists and 32 raft A part less than 16 in. is always treated a full space.—Con G. Goodwin, Oklaho: City, Okla. How to Get More Wear from Women’s Overshoes Usually the first part of a woman’ ber to and this is caused almost entirely by high, overshoe show wear | 1S sharp shoe heels, which have a te dency to push a hole right throug] overshoe lo prevent such wear ret piece of sole leather, sheet fiber, or other similar tough material, cut it t exactly inside of the overshoe hee fasten it with rubber cement Thi } be done when the galoshes are ne\ will be found to reduce the wear consi iblv—Newcomb Leonarde, Mvstic, ¢ Method of Bracing Guitar As my Hawaiian guitar is almost tant use, | keep the strings tight all time. This practice, however, spruns to the tone of the instrument neck some extent completely rut lo Tes tore I made the repair shown in the drawit This consisted in slipping a metal link shown in the detail, over the tailpiece pl of the guit and driv a small wo SCREEN-DOOR BRACE screw intot WITH TURNBUCKLE underside the then a neck runni brace, vided pt with the screw I W the neck v pulled back to its proper F. Johnson, Schulenburg, Tex. screen do the hee from th > ) a position.—1 ho turnbuckle metal brace t: 0 Of turning the y turnbucklé

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POPULAR MECHA ‘ater Glass as Wood Filler = Beer 2 p= linary water glass, such as t z ed for “putting down” eggs, FF e | es an excellent filler for soft | and is particularly effective ereen wood. yvering knots in ater glass, under paint, will | ip a hard finish through which ap will penetrate. It is ap- the ce of the wood is reasonably and dry. with a soft brush after Easy Method of Cleaning Poultry Nests ny backyard poultry keepers, from 10 to 25 hens, find the cleaning of the nests is re « 1 less unpleasant and trou- me. To make this job “Jitney Golf,” an Interesting Outdoor Game in Which Used to Ring Stakes an Tires Are one, merely get some pieces irdboard, and scape. cut them down to a Jitney Golf Is Interesting ingular shape about 1 in. wider and er than the bottom of the nest. Bend Last fall, during a family reunion on edges as indicated and cut out the our farm. the men sought amusement by ners. This makes a false bottom on playing “barnyard golf,’ but my partner the nest straw is placed. When it and I could not find any more horseshoes ecessary to clean the nest, the false 0 we originated a game played with old m is removed. If an egg is broken = ayto tires and called it “jitney golf.” At he nest, burn the paper board and re- first the others looked upon it as a joke with a new one. The side flaps but were soon impressed with the fact tl turned up when placed in the nest, it was much more difficult than it seemed hus offer handholds which permit one’ and. therefore, interesting 'wo stake them without diffculty—W. E. are driven into the ground, 50 ft. apart Visalia Ky and are left ibo projecting it About 8 ft. behind eacl] stake a ire mesh backstop is set up Two circles laid off around the stake as centel the smaller circle having a eter of 5 ft and the larger one, 8 tt. If desired, a pla ing court can be marked off as shown Two discarded 30 by 3%-in. tires | are still in such condition that they can be rolled over the ground, are used, and two or four persons play the game, ch co sists in trying to ring the stal Each p! iver OF pair of plavers are stationed at one of the stakes. Two rolls are made A ringer on the stake counts When the tire le on the the points gained are 10, when the inner circle, 3, by each side. for 25. ans stake, it drops in 2. Tf the tire rolls entirely outside of the - plaving vard, the plaver loses 10 points.— Bottom in Poultry Nests Makes It , : Easy for the Owner to Clean Them C, N. Harrington, Sioux Falls

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1028 POPULAR Barrel Hoop Holds Wood While Chopping * pet z a Number of Pieces of Wood on Edge in a Barrel Hoop Facilitates Chopping . | Splitt o ood piece by piece take a ong time as each piece has to be handled 1 P ' 1 + putin place andec eared away for the next ‘ ‘ : piece \ much quicker method is shown inthe photo. Get an ordinary barrel hoop and pieces to be et up a number ot l th the The mall plank plat chopped, Wi hoop around them chopping 1s dot e ona form and the writer has used this method for years with entire satisfaction.—John S. Carnes, Red Wing, Minn Care of Your Auto Generator A < storage battery during the winter than 11 there is much more drain on an auto ummer, due to starting difficulties and more use of light, a charging rate of 15 has been found best for the cold sea When it is often neces- amp son and 10 amp. for warm weather. the car is driven all day sary to burn the lights in order to prevent overcharging the battery pair Expensive re bills are often caused by an owner’ neglect in lubricating the generator bear ing Usually the front bearing gets it:

ME lubrication CHANICS the | from motor, but the one must be oiled, a small hole being vided for that purpose. If you run car about 100 miles a week, a few drop oil once per month is sufficient. Ii generator develops a grinding noise it repaired at once, as this is quite an indication that one of the bearinoe worn out, and delay in giving it attent may ruin the armature Squeaks i generator are usually caused by the est of the three brusl] e Che trouble ¢ be determined by lifting this bru the armature while the engine is ru: By smearing a little vaseline on the tact end of the brush, or bv alteri: position slightly, the squeak can ofte stopped, but, if not, a new brush is nes Brushes can be replaced n mo € ators without taking them apart, bt hould notice Care fully how the ( 101 to the brushes are made. \ b ho handy for lifting brus] SO t it tl 24 bru ] can be Te! loved ly KF. St vell, Ce r Celluloid on Windshield Prevents Steaming During the winter mont moisture u \ collect on tft ¢ de ot t € Vit ‘ ( dshield « cat \ coor P iS follow l € t eet tT Ce

| “FELT - IN-WINDSHIELD ! 4m—DEAD- AIR SPACE | ry —CELLULOID Steaming of the Windshiel ) FELT Can Be Prevented with * SECTIONAL VIEW Piece of Celluloid

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POPULAR 15 in. in dimensions, the edges paste strips width. he celluloid on the wind- o ~ about 6 in. in the driver, in- felt | in tront of of the car, with the shield and fasten it friction tape as shown. This between nst the a dead-air space tloid and the windshield, cell venting either from steaming. Electric Flatiron Thaws Frozen Water Pipes few during a cold spell, I found, that the bathtub position, Having been away for a my return home, behind the Their er pipes rozen, Vas hardly accessible, did permit the use of a blowtorch | them out | therefore electric flatiron and ap- to the trozen pipes. This produced quick results for in less inutes the pipes were thawed an extension cord connectec rht socket —F. W. Read, Luminous Paint on Keyhole When coming home at night, I had trouble in finding the keyhole, as the door was in a hall that was dark all the time. To eliminate the trouble I bordered the keyhole with luminous paint, as shown, and now it is an matter to nd in the dark.—Charles La- ur, Jr., Plattsburg, N. Y. often easy he kevhole Flashlight Used for Photographing and shadow effects in still objects can be ob- ned by the use of a strong flashlight to uminate them while taking a time ex- sure. Examples of this kind of work, an amateur photographer. are hown in the accompanying illustration Beautiful light hotographs of ne by MECHANICS 1029 Beautiful Time Exposures Can 3e Taken at Night with the Aid of a Strong Flashlight i igwiit use TO! e purpose i l irve five-cell type, i ig a cusing cap na « ipable of thro ne i po ertu he im t light. The camera is set about 2 or 3 ft. from the ob‘ect, and the light in a position on one side and somewhat bel | the camera.’ Then the shuttet vened and an exposure varving from |] to 2 minutes allowed By movin the flashlight throughout the exposu e. every port »t the object was well illumi ited Lock for Loose Hinge Pin Loose pins in hinges otten rk out of place and may be lost. It the pins are a fairly tight fit they 4 es \\ ill even Work up and vertical drop out of hinges. This trouble can be prevented by driving a thin fin- ishing nail or brad at an angle into the door or thie If driven at the right angle it will not the door frame. stop and need be taken out only if the hinge pin is to be removed.

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1030 POPULAR _ CENTER { A) ( SHELF Pull-Out Shelf Facilitates Handling of Linen When Arranging or Removing It from Closet Pull-Out Shelf for Linen Closet When arranging or removing supplies from a linen closet, the pull-out shelt shown in the drawing will be convenient as a place to lay some of the linen down while both hands are occupied in getting a piece from the bottom of the pile. Two cleats are nailed under the shelf where The detail clearly Although not necessary, a stop may be provided to the slide is to be located shows how this ts arranged prevent the movable shelf from sliding too far.—C. C. Brabant, Detroit, Mich. Emergency Repair on Worn Brake Linings When brake linings are badly worn and adjustment can no longer be made to make them hold, danger is in- volved at a time when the brakes are badly needed, In case it is impossible to have the brake MECHANICS . i TOOTHPICKS INSERTED AND BROKEN OFF bands relined at once, the following emergency re- pair will be found helpful: Get a number of wooden toothpicks and force them between the brake band and the worn-out lining at 1- in. intervals as shown. This serves as a shim, temporarily increasing the effectiv: ness of the lining. An auto with brak: repaired in this way was run safely It should be reme bered, however, that the repair is o1 temporary and that the brake lining mu be renewed at the earliest possible oppor tunity. a few hundred miles. Fitting Brushes on Fan Commutators Small electric fans equipped with carbon brushes often emit squeaking noises whe new, which is caused by poor fitting of t brushes. To avoid this trouble, the brus! should be “run in” in the following wa Apply two or three drops of thin oil the commutator of the new fan and « nect it to run Then set a second preferably larger, fan behind it so the breeze of the latter will cause it to tate faster than it would of its own ace At this high speed slightly softened by the oil, will soon down toa good fit.—A tabula, Ohio the brush tips, be H. Klingbeil, A Key Ring Serves as Picture-Frame Clamp Some time ago I had a number of s1 picture frames to make. Having onl clamp, I used ordinary spring key rin as shown in the illustration. They we cut to have an opening of about in., t r—KEY RING ends being filed to bevel. | found these so ef- a sharp fective on small frames that I have discarded the reg- ular clamps.— Harry G. Tienken, Svracuse, N. Y. Whitewash for Various Purposes Whitewash is an excelient preservative brightens the cellar, the cottage, the shee and the barn, and protects trees again worms and insect pests. It can be pre pared easily and applied effectively by a: one. Two simple formulas are widely use: for general-utility work, one for exterio: and the other for interior application. For sheds, tree trunks, stables, fences, etc., d' solve 15 Ib. of common salt in about 7

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POPULAR MECHANICS 1031 water. lo this so- yn add 50 Ib. (1 sack) the carefully bu, of cklime. Mix hly until a vdrated lime, or vy made by fresh thor- thick, formed. n to the desired con- ency with fresh water, For interior following solu- th paste is apply. the about 2 Make a | | 50 Ib. (1 ‘on | Photograph Showing Five Images of Same Subject Taken with One Exposure from a Point in Line with the Corner is popular: Dissolve of glue in of water. cream of ot hydrated bout 7 gal. of water, retully slake to a soit q° 11me putty 12 bu. of Five Photos in One Exposure me. Add the glue solution to the tirring constantly. As thin applica- On the Atlantic City boardwalk a pho vork best, make the mixture of such tographer makes use of a clever device istency, that the surface can be seen tor simultaneously producing five differ vh the film while itis wet. Thecoat- ent views of the same subject on the same ll dry opaque. Best results are ob- photo with only one exposure. The method ed when the work is done in clear, dry simple: Two large mirrors are placed her. By adding 1 qt. of crude carbolic together like the covers of a half-open to either of the above mixtures, the book, with the efle rfaces facing tewash becomes mildly disinfectant each other Che angle formed the mi ecticidal. Clean the surface to be — rors is about 40°. A small triangular table ed of all dirt, etc., and dampen it be is fitted into the space between the mirror plying the fresh coat so that the ind the subject to be photographed ll dry gradually. at the table facing the mirrors, which pro duces four reflectio it a point a te t behind he 1¢ -Bennie \gro How to Prevent Ink Blots aa Peter When Ruling oni ; i en u fan ordinary writing pen and ? . ‘ler for drawing lines, care ane be How to Tighten Cane Seats to prevent ink from creeping under Cane-seated chairs have a tendency to ruler. A good method is to slip sag aiter having bee 1 use fo ne time per clip over d reseating is t each end as sual considered This will le ce How- the ruler a ever, the ck can le and if some of be take up by e ink should ac- hi 1k ] ¢ cane lentally get on it, is fo Sponge ere will be no risk the les of the getting a blot on trips of cane with the paper unless, of 1ot soapsuds and urse, one is very then let them dry. reless. The use When nearly dry, the clips does not cover the seat with ttect the accuracy i cloth and go over the work. a t witha hot flatiron Clips on Ruler Prevent Ink from Smudging Paper it

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i ould eo game KDOtS

GUPPOSE we are mountain climbe: “and that one day, while stro amongst the peaks, we have to negot a series of five 100-ft. terraces in orde reach the floor of a vailey far below have but one 150-ft. length of rope, | ince one of us is an old hand, and 1 > 1 © 1 versed in the important element ol! making, we find the solution € proceed to use our rope in descend nirst drop, then, standing on the fi race, we give the rope a few vigorou and down it comes, tumbling in our feet. And so to the valley. Bacl the cliff again me taking the | round, of course, but anyway, « 11 immediate problem 1S solved. And w he doe the knot come in? Well, it o]

the all-important pré em of how to tal e «

° wit! SIE KO A si a eg ee ee

SS a y ~~ ie

al

} ty N Ze , SSeS SSS V;7N “ AN —=

OS Fe Ze ZA Na

<i EF EP DIAGRAMS SHOWING CONSTRUCTION OF SHEEPSHANK

— — —

Dropping down the Face of a Hundred-Foot Cliff, and Taking His Rope with Him as He Goes, Is a Snap for the Man Who Knows His Knots

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OW NOW By Sam Brown ink,” which is illustrated in Figs. 1 and First tied one end of the support. ope back on we lashed or solid pe to a Then, doubling itself, as in Fig. 1, we hitch around each end, as Fig. 2. Finally, we cut the strand that passed through both of the itches half en we dropped down the first terrace. ong as our weight kept the rope taut knot held with the strength of Gil With the weight off the rope, how he knot became slightly loosened it a few vigorous jerks was all that necessary to free it and let the rope e tumbling down Of course, we lost uple of feet of rope at every terrace the sheepshank should in the case of an emet the additional risk In sheepshank is used only quick method of shorten ney meriting cases, the andy and rope that is too long for a particular ise, without cutting it. 1 ti he knot 1s A practical illustrated in ere it has been used to shorten a tem trilv installed electric-light cord, and ec nN this Way, Fig. 3 it is a great deal neater, more practical, than the clumsy, tidy, tangled knots one usually sees em- oved for the purpose, 17 yell aS The knot as just described is but one of e€ many which should know ousands of lives are risked yearly on knot and others. everyone Every day sailors, risk Even plorers, mechanics and painters eir lives on the knots that they tie. ou and T use a rope occasionally, and we ually muddle through vorkmanlike manner. task in an The tying of a x, the proper lashing for a towrope, the 1 the ent way to tie a string to a rope these TWO HALF HITCHES MAKE AN EXCELLENT KNOT FOR THE TOW _———— ROPE \ A SIMPLE KNOT FOR > HAULING TIMBER OR SMALL TREES Above, Tying a Package Alone Is a the Use of the Kr Simple Trix ot Illustrated

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1034 POPULAR MECHANICS 1 1 where the illustrative photograph are everyday knot \ cha hould know son adds two or three unnecessary twi Knots should not be complicated affairs “just to make sure it'll hold.” of numerous twistings. They should be Farmers and lumbermen are constant of a kind that can be tied rapidly; they called upon to fashion a knot around should hold fast when pulled tight; they small tree or a heavy plank so that it « hould be easily untied. be hauled to its destination. For this pu With these qualities in mind, we will pose, they merely pass the end of the rop talk a bit on a knot that you use every around the timber, then lead it around tl day—the one used in tying a package. standing part and back for two or thr You want a tight string and a good knot, twists around its own part, as show: o, generally, a second person is called, Fig. 7. The strain holds it quite secur his duty being to hold his finger on the as illustrated in Fig. &. first knot while you get the twine or rope A common knot used quite freque: ready for the second knot. But why the | in everyday work, is the “Blackwall hite second person? If you twist the one end = shown in Figs. 9 and 10. In a junk yar taken, this knot was used to fasten end of a rope to a derrick hook while other end was fastened to the front e1 of acar with two half hitches. Both kn hold fast because of the resultant sti both knots can be unloosened in the pr ss- 9 1 + ‘ ‘ verbial Jit once the load has bee : ‘ ae leased. Of Cou! Linet en, carpentel al d paintel Ole il d it neces vy to t] ro 1 rope to : ‘ , “gigs! one who 1s stationed a considerapie ne above. Generally, the weight of the makes it un all TS able tor tl once around the a light string,as shown the ¢ in Fig, 4, and rope,andt then pull the the ba free ends cross- to the “hig! wise as in Fig. fellah.” \ 5, vou will find will that this single knot knot will hold simple O1 fast until you thing that vet the second knot into place, | A simple knot which is con- , ‘ tantly being used, or misused, by an auto- be easily untied by | mobile-riding American public, is the one the man at the | used to attach a disabled car to one that is other end. What “up and going.” For this purpose, nothing you want is the f | is better than two half hitches. Their for becket hitch. This | mation is plainly shown in Fig. 6, and is illustrated in d needs *no other explanation. These two Fig 11. It is ab- 4 hitches will not slip under any strain, and surdly simple to they can be loosened far more readily than _ tie, equally simple a haphazard knot where the average per to unfasten, and it ;

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( ng a single ‘ threads in a that cannot ibly slip. you long for e “life of a fire- then it be- ¢ absolutely ential that vou how to tie a vline. It is the ne and only knot POPULAR away with much unnecessary swork. This knot is also an non slip oO! thor tving ropes together, is sometimes led ot because of its ability to the the weavers ng ot fine weav- lowering a per- n from a burning ulding, for mak- -loop ld’s swing or for iking a large loop the end of any rope—a loop that can't ip under strain, 1) lo make the bowline. form a small loop 13. This distance as shown in Fig. be the rope, op should made at some rom the end of the rope so that you will ave sufficient rope to form the large loop, ig. 14. After the large loop has been rmed, pass the rope up around the stand- ¢ part and then down through the small 15. There! ghten the knot by holding the noose in the Op again, as shown.in Fig. ition and pulling the long part of MECHANICS Fig. 16, noose at the end of the rope tha rope, and you have a vou want to learn the proper motions In tving knots, any rigger on a build ( struction iob will how vou Qt cou é the ideal instructor the sailor, but there are not many of them in captivit rhe lumberman also 1s @ Paper can be made transparent tor trac- ine bv saturating it with turpentine; as : : } . "a4 Lea long as it is moist. the tracing can be | 1 carried on, but, when the turpentine has evaporated, the pape will again be opaque, } 1 ’ - 1 and nk ana Cotlotl

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1036 POPULAR MECHANICS ate , is of this importance, because engine-cot : TT uNe = pression ratios differ, and the cooling « ,) 2” BUSHING Ie oi ‘ i. a : he , ile =--" OR TUBE efficient and the r.p.m. of the motor u —_— ally vary with its make and model. W the development of higher compre ratios and higher speeds, it became nece sary for manufacturers to design tl spark plugs so that the heat in the mot did not affect their operation. Also, v a variation in cylinder-head design, t specified plug is necessary in order tl the proper location of the sparking pou may be had in relation to the combusti chamber. To perform efficiently, the el trodes must not become too hot. WI too long a plug is used, the lower end « tends too far into the firing chaml where it is exposed to the full heat of explosion, which causes the electrodes t become red-hot and results in pre-igniti loss of power, missing and back-firing ] the plug is too short, it will be pockete in the cylinder head, and a remnant of Improvised Corn Popper Can Be Made from an Old ; . . . a ee = Cooking Pan and a Piece of Wire burned gas in this pocket, lett during exhaust stroke, will foul the plug. 1 Improvised Corn Popper gases also will prevent proper firing of In the absence of a regular cor “popper, fresh incoming charge. hus, he it is an easy matter to improvise one that new spark occurs, there will be de will serve the purpose fully as well as the burning, causing overheating of the mot commercial type. Take a cooking pot of just as a retarded spark would. about 2-qt. capacity, remove the knob Means loss of power and fuel, the mot from the cover and fit a tube or bushing, ecomes sluggish and difficult to start about 2 in. long, in its place lo atin the acceleration slows up At times cover this bushing can be soldered, but if motor also may miss at high speed he cover is of aluminum, soldering is dif- ficult unless special flux and solder are Preventing Cast-Iron House Numbers used, at it may be better to rivet It. \ from Discoloring Paint leneth of galvanized-iron wire, of a diam- eter to fit inside ot the bus] ing, is then Ordinary cast-iron house nut be bent to the shape shown and a wooden when placed on light or white-paint knob attached. This stirring device is ro- wood, usu tated when the corn is being popped to , ally cause rt marks belo them. I fou that by g ing or fi prevent it from burning Use Correct Type of Spark Plug Not every automobile owner realizes the down t lower portior of the nun importance of the type of spark plug he uses with his car. His knowledge of its bers, as show in the phot relation to the operating efficiency of the motor is confined generally to the bare fact that it furnishes a spark to ignite the gasolfne charge. He should have the plug specified not only for his car in general but for his particular model, or he is likely near the number in trickling down an any rain wate will drop fre of the woo to invite trouble. The correct spark plug will not discolor the paint.

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All Shop Notes published in 1927, in book form—Fifty Cents—from our Book Department Hints for Ship Modelers By W. F. CROSBY builder who attempts blocks out of probably find that he is up against a tries to mod = SHIP o make his own wood problem, particularly if he ke these close to actual scale. In order overcome the difficulty, the use of ordi- wire solder, as shown in Fig. 1, is making may be ible way of This tained in several different ut the best poss littinge blocks solder diameters, it oft enough to be drilled easily and may with a knife to the des for the strap is cut in for the running rigging be cut ired ength. The groove and the hole it at right } angles to this use small flattened out A \nother method is to pellets , , ood slightly 14 > ww plastic \

thin wire strap may be worked around the pellet just before it is hard and a hole drilled without much difficult, for the line to pass through. This material will not split and blocks mav be made with great rapidity and with the utmost ease fhe only thing to watch out for is that the a HOLE+-7ANY : : > aa) }) “ey WIRE SOLDER WY —~ temo) cOmPUTE @/. ~ SINGLE BLOCK 72 WITH FILE MADE OF 2D

SOLDER (Z BALL OF PLASTIC FLE ee is wooo USED , 7) , SQUARE EDGE ASA \ |)! FIBER & puncn }*- ne WITH *iit: ceemun > HOLE WITH STRAP } ‘ Fis.! / TWO WAYS OF MAKING BLOCKS / AND PULLEYS ry y — Sy an» OPEN ENOUGH TO LET PUNCH PASS

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1038 POPULAR MECHANICS of a skylight with a small drill, later fi: BRASS DS WIRE~ ing it smooth with a file. Windows SCREEN) | | | Ce WIRES be made from old camera film, wa

\ =lea- > It ciean Ot emuision. Se : , , bs >” J On many of the old-time frigate _— aa K> SCREEN of-battle ships and other war ve <b. k / a” é ' » ER, tlt ads A ve _-— WIRE ~ the atter side ot each top was arrat * =e I

board or to the deck. (See Fig BULWARK— oN These rails quite often had a Ve 7 with a small rail which was put there id : i keep the sharpshooters from falling | SS : Casa Keep the sharpshooters trom talling o IF aes Li me rope screen woven into Qu HAMMOCK BERTHING ON RAIL ‘

Fig. 4 RAILS FOR SHIP MODELS and in making a small mod it is extremely difhici

this However, the difficulty has bet solved by procuring some ol the extret fine copper or brass screening u making and repairing gasoline filters blocks are all of exactly the same size. automobiles. \ framework should e decl oO the iverage uling ship made of light copper wire and the ‘ t be found to conta everal gratings ing tastened to it bv sewing Or fine mes iN Ot » or three sk thread o1 copper wire rhts which may be extremely difficult to Phe ime c pe creel 1 t make of woo iher of a thickness te for the hammock be ‘long 1 the cale or the iodel will Serve the rail of most of the e old i | | purpose ry materia yt split and this screening: also being supported may be vorked i | in ed to look « ire uprights set at appropriate ¢ t ictly like wood For gratings, the Ze More than half the charm of d shape should be secured and marked model lies in the accur of the worl ott into the de ed esh Che ta r end in tl re ect it C ential that the of a small r suuld then be juared off ving be of proper size The sta ot en don i stone i | Ss may be irious mast ilu be o the ¢ ed a puncl Che he held overt ¢ t material, the lowe hrouds of the O lot ope o it é sf Fig heaviest and the upper riggin yrmie Z ind the heme ide inch drive lighter Phe running rigging will be through it by a quick bl of a hight lightest of all hammer The entire surface may thus be Since suitable cord is sometimes |} worked into the desired number of square to get in the right sizes, it is some holes. If the fiber has a tendency to shred — easier to make up material which off on the underside, an old razor blade suitable by winding together sever or sharp knife may be used tor trimming smaller cords to make one large “rope off this excess material. This may be done by measuring the Fiber also may be used for rails and proximate distance that the line is to kvlights, but in the heavier sizes it may and then allowing a few inches at e be necessary to cut out the square holes end for fastening. Take several

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POPULAR eces and tie them to the workbench or ten them in a vise (see Fig. 5) and en place the other ends in the chuck a small hand drill, turning the handle ward you and winding until the different rds are securely twisted together. How- er, do not wind too tightly or the cord ill be greatly shortened. Such rigging must be kept tight or it ill untwist and small clamps may be se- cured to each end until it is time to use A better and much more satisfactory ay is to make up the rigging only as needed and then keep it taut until it is ecurely in place on the model. One of the tedious jobs in completing n old-fashioned ship model is in the mak- ng and finishing of the many guns nec- The guns themselves may be cast better vet, turned rom hardwood on a small lathe. In the itter case, the material should be finished mooth and then painted either with bronze or black paint, depending upon the period of the ship. essary. of lead or solder or, The average frigate had carronades on deck ¢ ind the heavier guns below and, in nine out of ten such models, the deck :, uns will be made incorrectly or mounted were considera- smaller than the other guns and had carriages which consisted of a flat piece ith three little rollers on the underside. itself mproperly. Carronades The carronade was mounted on a Curtain Rod Holds Surgeon’s Tape Rolls of ad- hesive tape of varying sizes are always convenient in the office of a police surgeon San Diego. ly Cals, the rolls are held on asmall curtain rod lust below the ) rod, a piece of « plate glass 1s ' provided to permit attaching one end of 0 the tape to it when it is necessary to pull c section of tape off the roll and cut it vith the use of only one hand, as, for in- MECHANICS 1039 . LOWER-DECK GUNS; / TWO WHEELS IN REAR f TRUNNION | 4 ee - =gxet -[ "ee+— BULWARK ( a in ‘ | bp— O | ' d PFO Set ; , EYE FOR TACKLE TO BULWARK _ LONG GUN FOR MAIN DECK Fic.6 swivel at the end nearest the rail, with a wedge arranged under the inboard end to depress or elevate the muzzle. On the average model of this sort, the guns on the lower decks will simply be short pieces cemented into holes in the hull. should be = slightly greater in and also. slightly longer than the ones above. If long guns are to be made for the main deck, Fig. 6 These diameter guns will furnish a guide to the proper propor- tions for gun and carriage. stance, in case the other hand is needed for holding the bandage on the natient Alpheus Lincoln, Los Angeles, Calif, Acid Helps Remove Broken Tap Mechanics often have trouble in remov- ing a broken tap, especially if the tap is in tight and has broken below the surface. Before attempting to use any tools to re- move it, fill the hole containing the broken the tap muriatic spirit of salt, taking care not to get it on the hands or clothing. Let the work stand for a few hours, which will give the acid time to dissolve some of the steel around the tap, so that the latter will be loosened sufficiently to be turned out. the broken tap will become so loosened that it can even be lifted out—James E Noble, Toronto, Can. part of with acid or Sometimes

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1040 POPULAR MECHANICS oes S , a istotevee es, 2 -- re He aqiuaat ESS ate De® PS SSSSSSS™ SLED LEDER LAL LALE CC EM Ge hg daeeaenrd Jase teases Sey 235 ITI leew Portable Truck Tracks, Made of Hardwood Slats Connected by Means of Chain, Prevent the Risk of Running Deep Ruts in Soft Lawns, besides Saving Considerabie Time Portable Tracks Save Lawns from Injury a turn at each revolution. After it by Delivery Trucks once set up, we made good time in t ; way.—C,. Kugler, Philadelphia, Pa, Portable tracks made of hardwood slats and connected by means of light chains . Repair for Broken Gear Tooth have been found very useful in driving over soft lawns, to prevent ruining them. It is occasionally necessary to rep One truck owner who handles coal found a broken tooth of an iron gear, as thi sections 14 ft. in length most convenient. not only much easier, but also less exp Each of these weighs about 70 lb., can be sive than get- - —- rolled up into a compact bundle and ting a new BROKEN TOOTH BABBITT readily put on top of the load. This track gear, espe- g saves the customer the extra charge for cially if it is carrving the coal in baskets or bags, and large. There the coal man a lot of time——S. Merritt, pair described Nvack, N. Y. here is. only intended for ; 2) CF/7 os 4 ——— use on parts - = Facing Pipe Fittings 7 that are not SHEET IRON — F In our machine shop a job came in subjectedto = ens ae which made it necessary to face off pipe heavy loads. The gear face is gro elbows so that the two ends would be at down on each side of the broken toot CROSS SLIDE~ perfect right and a piece of sheet metal is then u FACEPLATE ~~, A! angles lo to make ae shell ota adits tootn. AN do this we sheet metal should be as heavy as cat blocked upthe conveniently worked. It is bent to lathe and the over an adjacent tooth, one side bet elbow with bent first and the top ection bent b parallel blocks so that the tooth will not be too w as shown, The’ The shell is securely fastened to the cross slidewas as shown and filled with babbitt. ¥ 7 \— BLOCKS 7 fastened tothe faceplate, with the cutting tool arranged @ Chalk rubbed on a file for use on ste to turn down the face of the elbow. The prevents chips from sticking to the t handle of the cross slide was given part of and scratching the work.

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POPULAR MECHANICS 1041 A Simple Rack for Draftsmen lifferent times a draftsman needs a e number of tracings and blueprints reference, when working on a single and unless he has them arranged in stematic way, he loses a good deal of in picking out each sheet as needed. iddition, he has little room to work table is covered with a pile of draw and his difficulties are seriously in- ed if he is engaged on the kind of vork in which one job is continued sheet to sheet. A handy rack which es up little room can be made out of in. plank, about 1 ft. square. Plane sandpaper it, and drill sixteen 1-in. es—four to a row—which should be ugh for most purposes. Sandpaper the de of the holes, varnish or stain the ck as desired, and mark numbers neatly nst the holes. The rolled drawings then be placed in the holes, so that will take up little room, and will be to pick out. Drawings usually have mbers assigned to them for classifica on the drafting-room records, but for purpose it will cause no confusion if porary numbers are given to the dif- ent sheets, corresponding to the holes. numbers can be written lightly in on the backs of the sheets. Handy Drawer for Double Bench en a double-bench drawer can be ed out from one side only it is annoy- for men work- on the other as they either e to walk around k someone on drawer side to the tools they ed. One shop ed this difficult, imple manner: rawer was made tull width of the h with a handle *h end, and the holding com- ent Was afYr- d to slide in- e drawer, on ; Handy Drawer for Double Workbench Can Be Pulled Out at Both Sides runways, . FL, regular lacing. It is y> 4 oy” strong, lasting and Cutting Lips on Edge of an Old Valve Make It a Good Valve-Seating Tool Valve-Seating Tool Made from Old Valve A tool for cutting valve seats can be made from an old valve. The edge of the head is slotted with a saw in about eight places, as shown in the illustration. One side of each slot is relieved by filing in o1 der to leave one cutting edge. The valve head is then hardened, An ordinary valve grinding tool is used to rotate this cutte: In ordinary cases, only a few turns are necessary to true up and smooth a roug! seat—G. A. Luers, Washington, D. | _7~ DOUBLE BENCH DRAWER — SLIDING TRAY ; Emergency Lacing for Belts Take a piece of electricians’ tape, about 1 ft. long tw t it lengt ‘ ee ee on +4 oTrormacord abou e thickne of a J match, and lace the as vou would with lies flatter than o1 dinary belt lacing | also it will not cut Ben F. Imhot Day enport, low a

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1042 POPULAR Cellar Doors Aid Work of Excavating Besides Pro- tecting the Workers in the Pit Cellar-Door Idea Employed in Foundation Digging in sinking wells, 209 ft. deep, on thie site of the Cleveland terminal, when the bucket carrving the excavated material came to ‘ he top, it was raised 6 or 7 ft. above the ground. Then the men slammed down two doors similar to cellar doors. As soon as thev were down, the bucket was lowered onto them and dumped. shot the excavated ma terial onto a platform where it was picked up easily. The empty bucket was then lifted, the doors opened and the bucket ] LOW ered. Being on a sharp Slant, the doors The doors prevented anv of the excavated material from dropping back into the well in the process of dumping. They were safety devices besides facili- tating the work considerably. MECHANICS To Prevent Radiator from Freezing Autoists are often bothered in the ter by the freezing of the cold-water leading from the bottom of the rad to the lower part of the cylinder jacket. If this pipe is frozen, an engine is started, the water in the part of the radiator will as heat soon boil goes up, and not down, boil away before thawing out the { pipe. method oj edying this, in a way that is e automatic. When the circulatio stopped, the boiling water is soon c off in the small pipe. lower end of this pipe is loosened fro: fastening, at the base of the cold-water pips heat of the steam will thaw out that As soo! has thawed out, the circulation, of c will be resumed. There is an easy overflow and moved to a point di while the car is in motion. If the overflow pipe is so located it cannot be moved, the autoist carry a section of rubber tube to sli; the end of the pipe, and so direct to any cold part of the radiator he d: The steam flow will cease as soon culation of the water through the is taking place again. > € Fixture for Bending Structural Iro: For bending light structural iron o kind often used in foundries for t: tracks, the illustrated fixture has found useful. It consists of two plat bolted to a steel block, B, and to two ing pieces at the ends. Two straps used to hold the device and the wor! gether, and can be moved along the plates A to suit the work. slock Bis threaded to receiveascrew provided with a bar to turn it. The draw- ing shows an about bent, which is done by turning the screw aga it—C. Kugler, Philadelphia, Pa. PIECE TO f [-beam BENT to be

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POPULAR MECHANICS 1043 “ombination Seat, Cabinet and Workbench e illustrated combination cabinet and workbench was ited at an exposition of the n housewives’ association, hows what can be done along saving lines. It can be used ill chair if desired, although massive for this purpose. 1 material can be stored in 1, d when it is necessary to ent + e olass urtace from being scratched. g very little pressure wa found needed to keep the work from tur1 The tube wa cl ucl et and centere d bi unning theta cente up ett o the a oO the ce er rest \ } ‘ é take Henry M . . from the mall toe Saving Combination of Seat, Cabinet and Workbench; the Upper Phot rrinder and put up ove Shows It as a Cabinet and the Lower, as a Workbench ; pee Ia ee bench for cutting material, it erinder, whi vascarrvinga yet be et up quicl nd thout trouble ele ¢ e! ee] = 1 the to pe ng the double « apieces al I the tt oO! ‘ tool. Phe . lle e ee heel t Working Glass in Machines en eee ape ae tonal s cut as usua iT il it bv u ne time we had an order for hard wheels, dressed e k, glass tubes, inside diameter in., by using c ] of whee le diameter 44 in., and 10 in. long can be worked « easily Ct led e threaded on each end with eight teel ry ld lv t e | ids to the inch. The lathe was geared as ell GI hould he w ed ir this thread, and a three-jaw uni peeds. and a dull surface will be e re chuck put on the spindle. The sult. The emerv wheel 1 t be ke é vere chucked with a piece of leathet either hy ll ne a centt fucal put ' r hy ed between the jaws and the glass. means of a tin can with a hole punches the other end of the glass tube the in the botto: ! B Muro! Plante} rest was set, and a piece of leather New Jerse.

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CHOW TO ‘YOUR OLD The Popular Enamel Finish off with clear water: the rinse-off important, as any deposit of soap left the surface is liable to prevent the finish from drving or cause other t1 Next wipe over the surface with a dampened with gasoline, naphtha o1 zine, to cut any greasy substance that be present, from furniture polish or handling a chair receives. Then paper the surface lightly with No. 00 paper, as in Fig. 1, to cut the g! the previous finish, and dust off loose particles of sand That’s all it is necessat do in the way of preparat work, unless there are holes or cracks in the w in which event they s! be filled with a plastic —psbrtclelag ene finishing, for- merly an art for the professional only, has, with the vogue for color and the popularity »f enamel and lacquer fin- ishes, become a fascinating hobby of thousands of amateur painters throughout the coun- preparat try. It affords an opportunity, ail dant th second to none of the home oni crafts, for the practical and profitable use of spare time, and is quite as interesting as fashioning things from wood or metal. when one knows how to go about it. Say, you have for purpose with a mixt of fine sav liquid glue whiting: dust, she and whiti1 one of the old-fashioned golden-oak chairs (Fig, 2) with high-gloss varnish finish it can be converted into an odd chair of as smart and professional appearance as any vou see inthe stores. (See Fig. 4.) First, determine the color scheme. The charm of the odd chair lies in its beauty of color, and the use of the right colors to fit in with the decoration and furnishings of the room in which it will be placed. Have a definite location for the chair, and select colors that will look well in this par- ticular place as well as in combination with each other. Next, prepare the surface for refinishing 3 It is not necessary to remove the old coat- ings. Ordinarily, vou can enamel pre- viously finished surfaces by preparing them as follows: Simply wash the piece thoroughly with soap and water, and rinse 1044

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) EFINL D | FURNITU / ( ‘ay ' BCC LLMIOT lust, lacquer and whiting, any of wae a ce ’ is satisiactorv, knifed well into the ture, and, when dry, sandpapered the hat the piece has pre been finished in mahogany stain, it of pure shellac should be applied the clean-up work, to seal in the erful stain and keep it from “bleeding” the finish. Of for finest possible finish, gs should be th paint ver, or absolutely even with surface. e event, also, 1 , } 1 1 1g] new course, the old Sti ipped varnish re- the and sanded down to e wood, and the new finish lt up from the wood, but trictly first-class job can produced over old cr bln \Ve are now ready to d up the enamel fin- Enamel is Sparent by it is to provide an necessal even iounda tion of solid covering paint, to hide the wood and surface imperfections. Re ular enamel under- coater,sold by paint store (usually in white « al d convenient form of flat ma 1 is the simplest 1 terial to use for the ver light colors, but when enamel- ing in the bright and_ stron ] - le 11 : } ] colors, fat Wall paint, in acolor closely approximating the color of the finish- ; Ds . 1 ing enamel coat, 1s usually a more sat- undercoater ror the amateur, 1] "4 . ’ When hinis ng in WwW Istactory Y l ite or any of the light colo uch as ivory, cream, sand color the aelicate one ot b ue cree} etc i three-coat job ordinarily pro duce a the Oug il ractory finis] W en prope V app ed First, apply a « of flat undercoatet in which a little irnish (about 10 to 15 per cent) ha been 11 corporate l, to help the coating adhere to the old varnished finish, without « pin off later o1 Sec ond, when dry, sandpaper lightly, to re move brush marks and level off the su face, dust clean, and apply a coat of ha ul dercoatet and ] alt enal el 1 xed | I rd when dry, sandpaper lightly, dust off, an apply a finishing coat of full ename

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1046 POPULAR lt, owing to the condition of the sur- face or lack of expe | rience in painting, a thoroughly satistac- \ torv finish is not ob \ tained with three coats, especially on large and conspic- uous surfaces, sand- paper lightly again and apply another coat of full enamel. the other hand, On with the bright or dark colors, it is often possible to produce a first-class finish with two coats of straight however, mixing a enamel, preferably, little flat undercoater (about 25 per cent) with the first coat to give it a little more body and make a more solid covering. Enamel coats should be allowed to stand at least 48 hours before sandpapering and recoating: undercoaters may be sanded and recoated the next day. Only fine sandpaper should be used, never coarser than No. 00, and preferably very fine No. 0000 or wet-or dry sand paper or garnet paper for the enamel coats. In applying enamel, first brush it onto the surface freely and quickly, with the erain of the wood. Then “cross over,” without refilling the brush. This drags the enamel over any spots that may have been missed in the material and spreads it out into a uniiormly even film Then, with light strekes, brush surface again with the grain, without re- filling the brush. This gives a smooth, even, porcelainlike surface. applying over the process MECHANICS enamel work is important. A brush should be used, as it is next to Sott possible to lay on undercoaters and et with a stiff bristle brush, without lea, ridges or brush marks. portant to keep dust Particles from [t is also most trom sandpapering dusted off, brushes should be perte clean, so that no dust or particle erit will get int a ~ work trom N\ and care shou ~ . \ taken that no \ . 1 \ IS raised ’ room until the \ amel has dried d tree. Work } | i as possible, } brushing of the face after the amel has commenced to set will result rough finish. The final enamel coat can be left in rubbed to a semti-dull finish, o1 olOss, ished to a highly brilliant “piano” fi The rubbed effect is produced with icestone and oil in the following manne Place some powdered pumicestone, w! can be obtained at most paint stores a drug store, in a saucer or shallow In another receptacle poura little regu rubbing oil or good sewing-machine Fold a soft cloth into a pad, or use a ular felt rubbing pad. the oil, then dip it pumice, and rub about six times, the surface, into the and with not over five or heavy pressure, so as not to cut throus rhe use of the right kind of brushes the surf 1 a Snoute be done as qui Moisten the pa powde 1

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POPULAR MECHANICS 1047 rub with the grain, and as far as e. rub the entire length of the sur ith one stroke, to avoid a patchy ance. Any carved or relief work reached by using a small vegetable , dipped into the oil and then into the estone. When through; clean by 1 off the surface with a dry cloth,

a little cornstarch if necessary to \ Iry up the oil. Water is sometimes nstead of oil for rubbing. The rule e pumicestone and water wherever esired to rub undercoats, as oil rub- ves a greasy film on the surface cannot be satisfactorily finished Oil is best for the finishing coat, a rubbing cuts much faster and is to spoil the finish. e high polish previously referred to duced as follows: After the pumice —$—$ » rubbing and clean-up, wait until the furniture, except that the first c: ie day, and rub the surface again, undercoater should be thinned milar way, with powdered rotte pentine to help penetrate into and water, which imparts the hand- the absorption demand of the wo | ed effect seen on the finest furniture. of course, the preliminary cle ubbing of a fine enamel finish call necessary. The surtace, however, should carefulness and considerable good be sandpapered with fine sandpaper h ent, and the amateur should be very the grain, to plate smoothne ous when first doing this work. narily these pieces are only machine npainted furniture and novelty wood- = sanded, and when examined will be found re, now so popular, can be finishes hich sl ld he same way as previously finished — be sanded out for a fine

Auto Used as Tractor on Ice a ee iron wheels so that it « : ‘e skating rinks throughout the coun- tractor for pulling scrapers over the ice ay profit trom the experience ot the This method is mucl etter than the use ng pavilion in San Francisco, where of chains. which are not alwa effect

, ' 1 \\ e ma ‘ ‘ ¢ ott e 1 1 things to re Y » Kee solderit cid o1 é ‘ a i cleaned Ie i su ce e < 1 1 , \ mane t vé¢ ciithe t ¢ ear | ¢ powdere TO ] f ‘iil od non-ta ead Neat Brent , ; ¢ used SO gy the ‘ } o Auto Equipped with Grooved Cast-Iron Wheels Sas | Nob! ay ‘ Pulls Scraper over Ice J ATITG . .

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1048 POPULAR Inclosure Prevents Frozen Pump Although the surface for emptying the pipe above provided with drains below 12-In. Wooden Inclosure Lined with a Prevents Pump from Freezing Straw Wall the cylinder, some pumps freeze in cold weather, often when the supply is low or there is an urgent need for water. The owner of a mill-operated pump built a sim- ple inclosure between the four tower legs, as shown in the illustration. On the in- side, a straw wall and roof, about 12 in thick, was held in place by woven wire This insulation even tem perature, keeping out the frost during the winter, and the extreme heat during sum- mer. The door is on the south—Dale R. Van Horn, Lincoln, Nebr. maintains an Using a Large Planer for a Press had diameter steel and 4 ft long, which had to be a press fit over the Not hav- ing a press large enough to handle the job we were stuck until the following idea was hit upon. There was about .003 in left for a force fit. Both ends of each tube were capped and live steam turned into them, which enlarged them about the amount mentioned. The rods were bolted upon the platen of a 36 by 36-in. planer, time several tubes, about 5 in. in Some ago we piston rods they were to cover. and a solid backstop was erected just far MECHANICS enough tube. allow for Starting When all was ready, the steam away to turned off, the caps removed, and the tube lifted in position and shoved on by for about 8 in., when it began to go | then the planer was started very which pushed the tube home without ther trouble. The whole scheme out very nicely and without much ou —A. Dane, Pottstown, Pa. Rough-and-Finish Calipers When calipers are set to a certa mension, care is required to prevent work trom being made too small. H ever, with the calipers changed as one can work quicker because the when one is near to the cor: size, leaving enough stock for finis] shows The calipers are made in the ordinary but: with an auxiliary leg as shown, w! is riveted to the short leg and a vee out on the top. The short leg i tapped for a fine-thread screw, whi put in tight. Next a knurled nut is with a plain part, which fits the vee ot auxiliary leg. In use, the calipers are to the finished size of the work with nut tightened. To measure the work d to the finishing cut, the nut is loosened to clear the vee. This allows the leg to 1 to the extent of the difference betwe the plain part of the nut and the diam« of the screw. The nut, of course, is ag tightened to lock the leg for the fini size. With the auxiliary leg unlocl work cat done rapid and if it d happen too big a is taken the work will usually found t! there is sufficie: stock for ishing, due the differe allowed by the two settings on the caliy —Harry Moore, Montreal, Can. @A stick wedged into the slot will sor times aid in starting machine screws.

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An Unusual Table Lamp By H. F. WEATHERBY lamp illustrated herewith a novel design, but it is addition a most attractive and useful ece of furniture to add to one’s living om or study. { hve: TABLE not only ot! It gives a very restful and easing reading light and provides a space one’s fa books, always at hand. desired, the book shelf may be dispensed and a simple vorite stretcher, as shown i1 ne of the illustrations, may be substituted. Most of the Popular Me- some small articles readers of least hop equipment, anics have at and the construction 1e lamp calls only for a coping or scroll handsaw, brace and 3%-in. bit, plane, ilf-round wood file, a hammer, ise in which to hold the work. and a Go to the nearest cabinet shop or mill here plywood can be bought, and get ,-in, material, from which the following ieces can be cut: 14 1n.; Two pieces for shade, two pieces for ends, 7'4 by LiAmSow> An Attractive and Decidedly Un- isual Table Lamp That Is Very Simple and Easily Made, and Will Give the Home Mechanic a Chance to Display His Skill Asctnune T Wit 16% in.; one shelf piece, 33% by 1214 i1n., and one 3 by 12 2 in. Plywood Is recom mended because of its strength, and the chances are that scraps can be little or no cost, found, at large enough to make the above parts. A cardboard pattern ends, laid out for the sing l-in. squares. Ex act dimensions are not given on the draw esign may be press one’s individuality. tern as a template, endpieces and as indicated, u ing and the d changed to ex Using this pat- mark around the two saw them out with a coping, jig or band saw, if available. Smooth the rough careful to keep the plywood from splitting. The straight edges should, be planed carefully The top pieces may also be cut out with , but great care must be taken to keep the inside edges straight. edges, being of course, a coping SaW If a cir- cular saw is at hand, and you exercise care, the glass ope ngs may be cut and rab- beted on this machine, as indicated by the left-hand section a iil of frame; other- wise, if the work is done bv hand, rabbeted blocks, as at the right, will prove easier to make and much more satisfactory [he shelf parts call for no expla- nation other than that they must be i ‘h \ 1049

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1050 POPULAR MECHANICS two-tone lacquer effects that are so popu lar nowadays and that set off small | art | cles of furniture s yw ell. { i S11 as , ee i-——— ———_ sh : { ) “99077 4 | Y y i / 4“ ny a “& ry \ | “13 . ——— d tee 3 u et” DETAIL OF FRAM | : a SS as &\)\\) LooKine at |\\{ THE INSIDE ) rt ee — | [| ati } L = =. Z 1 ot jet A t s i ! | 165 a f e tr IS : ! + x STOCK —— J —* - Pe eee ~ ——— -—_—_ — ~~ carefully squared to the exact dimensions desired \ hole of in. diameter, to accommo date a ort le 0 oO Q 1 t € ded 1 Ty¢ bored just above the opening on one of the endpieces. When the lamp is fin ished, a screw-thread socket is to be turned onto the inside end of this pipe and a nut t on the outside end to hold the socket The pipe may be extended to the cente: Colored art glass to match the finish of the frame, and an ell and nipple used to suggested for the shade, or simply a wl make the bulb hang vertically, if desired, vround or frosted glass which can | or two bulbs. one at each end, can be used made most attractive by the additio: instead of the single bulb at end or center, two of the transfers that are being u to suit the maker's taste. If the latter svs- a great deal now. If the maker its sul tem is emploved. it is suggested that long ciently skilled, a design may be painted « bulbs of the candle tvpe be used. he the glass. The glass is held in place wiring, of course, is verv simple. indicated, After careful sanding, nail the different —_———- parts together, and place 1-1Nn. SQuare clue q To sharpen the knives otf meat blocks on the underside of the shade, and machines, first rough-grind them, t under the shelt None of these can be them up under a drill press so that ! een, but they will help greatly in adding machine turns them backward, with turdiness to the finished job. When cutting side of the knife face down « these are dry, finish the lamp in any way _ piece of plate glass on which valve-grind desired. The writer suggests some of the ing compound is applied.

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POPULAR MECHANICS An Inexpensive Universal Joint n light and medium-heavy machinery, ery cheap, durable and efficient uni- sal joint may be made from three aight chain links of round section. In nnecting this form of a joint, one end each shaft, the driving and driven, must lotted to receive the end link, and a lt put through the shaft to prevent the k from pulling out. A reinforcing collar hrunk over the end of the shaft to engthen the slotted part. Such a joint drive at almost right angles with very tle friction. It is especially recom- nded for experimental and_ similar sses of machinery. Hose on Street Protected by Pipe When a length of hose is run across a treet, where passing traffic is likely to cut r crush the hose, an inexpensive and ef- ective protector can be made of pipe and as shown in the drawing. Take piece of 2-in. pipe, about 10 or 12 ft. long, a tee at each end and screw a 1-ft. ngth of pipe into each tee to project in pposite directions, in order to prevent e pipe from rolling. For garden hose, in. pipe has been found satisfactory, but r larger hose larger pipe should be pro- ded. Such a protector is practically in- destructible and can be carried from one hb to another without even removing the sse.—G. C. Douglas, Raleigh, N. C. ttings, Length of Makes a Good Protector for Pipe Laid over Busy Street Hose Yardstick Held at Right Angles to End of Pole for Taking Overhead Measurements Measuring Overhead Pulleys In making a survey of a large industrial plant, the writer found it necessary to measure a number of overhead pulleys which were rather difficult to get at so that a stepladder had to be carried along. To eliminate this encumbrance, | mounted a yardstick at the end of a long pole as shown. The end of the pole wa planed square, and a strip of tin was bent to a U-shape permitting it to be screwed to the pole to hold the yardstick at right angles. Obviously, this device can be used for taking other overhead measurements. —L. G. Roller, Cedar Rapids, Iowa. How to Make Wallpaper Washable Ordinarily wallpaper cannot be washed but the following treatment will this: Dissolve borax, 2 parts, and shellac 2 parts, in water, 24 parts. After mixin: thoroughly strain through a fine clot! With a brush or a sponge apply this to the surface of the paper, and when dry, polis! it to a high gloss with a soft brush. Thu treated, the paper may be washed without fear of damaging the colors.—Edward Pi- ranian, Phiiadelphia, Pa. enable

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Useful Tire-Chain Repairing ‘Tools By G. A. LUERS N tions many garages and the repair important task, auto-service sta of tire chains is an especially during the win- ter months, when the and roads broken. Streets ire icy and chains are frequently Close to the bench, a strip oi wire me is tacked to the studs of the wall o wooden cleats nailed ther his for a simple holder for spare links for rep | he links can be hooked to tl Hlowever, as very few garages have proper at almost any point, or, if desired equipment for removing, inserting and links can be arranged in sections, accor clinching the links, the tools described in ing to their sizes, which may be m his article will be of interest to owners ot on the wall above the mesh. We tablishments. For opening or cutting out links the vee mud and dirt are washed off the is a simple fixture at the leit end o chain prior to repairing them, they bench. It is detailed at the top o hould be dipped in a bath of ed crank drawing and consists of a punch, he case oil and kerosene, in order to prevent loosely in vertical position in a_ hold rust A steel drum is convenient for hold This device is less tiresome to use that ing the mixture, and a porsrgrd of hook pair of heavy pliers, tongs or hand cutt hould be provided over the drum so that Several chisel-shaped punches, ot the the chains can be hung up after the bath diameter, about 34 in., so that they ind the surplus oil drip back into the all fit in the holder, are provided, sor drum. A bench, about 10 ft. long, will having sharp, hardened edges for cuttir provide plenty of room for extending the the links, and some with blunt, wedg: hains full length on the top and work- shaped ends for opening them. The ho ing on them. The bench also makes it is made of steel plate, cut, drilled easv to inspect the chains and avoids the bent to shape and securely mounted o1 inconvenience of laving them on the floor steel base. = P S Oe Gas ae \\ re) ee a ln eat FOR ; | PUNGH FRAME ~tne- MADE OF STEEL |--~-- : E PLATE Ls ~ PUNCH CUTTER ASSEMBLED = 2 IP Za VE eas BRACKET PRESSURE LEVER - nie OF STEEL - , = . ——— — ~ % Sic Y We> CAST-IRON OR STEEL BLOCK? ST FOOT-LEVER — AJ A CONNECTING Lon SUPPORT _ LINKS, | oe BRACKET A - at po ; _ ie 0° "PARTS OF FOOT- OPERATED LEVER FOR CLOSING LINKS The Provision of a Separate Bench, Equipped wit! Fixtures for Repairing Tire Chains, Will Be Found t Be of Considerable Utility in Garages and Other Aut Service Stations

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POPULAR MECHANICS ir closing links, a foot-operated press, ed to exert heavy pressure when the is pushed down on the lower lever, mits the free use of | oth hands for as- bling, setting and holding the links or n sections under the jaw. It is unted on the bench and consists of two rs, one forming the press jaw and the er the foot treadle. Two brackets sup- the rear ends being ed together to permit free movement these levers, each, and a spring, not shown in the ving, provided to hold the levers in an ated position for working. A steel cast-iron block is bolted to the bench er the jaw of the upper lever, which uld be made of steel, while the lower mav be made of wood. The brackets nade of steel plate. With these tools equipment, any shop is able to give k service in the repair of tire chains. Screw Holder Made from Clock Spring Difficulty is often experienced in getting ews started in places where one cannot id them with the fingers. Many methods | devices are resorted to for doing this, it the one shown in the photo has been und to be effective. clock spring, put them to- Take two lengths about 3 or 4 in. long, ether as in- in- rt the ends, hich must e ground uare, into he screw cated, ot, and the prings to- ether at the her end. his will grip ress e screw ‘urely so at it will t drop off, nd can ulilv be in- rted. Also, ie Curva- ure and the stiffness of the springs ena- le the worker to give the screw a consid- rable twist. 1053 Oilcloth Cover Pulled Protects Them from Frost Down over Bunch of Bananas Cover Keeps Frost from Bananas When bunches of bananas are left sus- pended in a store window overnight dur- ing cold weather, they may sometimes be frost-bitten. To guard against this a Wisconsin fruit dealer improvised the effective protector shown in the illustra- tion. It consists of a cylindrical cover, made from small barrel hoops and white oilcloth. To the top edge two equal lengths of stout cord are fastened. An old window-shade roller having a good spring is attached to the ceiling just above the bunch, and the free ends of the cord The cover can then be raised and lowered in the same way as a window shade, and does not spoil the appearance of the window. are tacked to the roller as indicated. Refacing Old Oilstones When hollows begin to appear in oil- stones, it is time to reface them. This can be done by grinding the surface down on a marble slab, on which coarse emery and some water are applied, Slate can be used instead of marble if desired, or a piece of coarse emery cloth, tacked to a smooth Rub the oilstone over the abrasive with a circular motion. board.

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1054 POPULAR 4{q t Hh ‘ iv 4 & 1 a J _a—> . 2e> Y nl “a = rs DETAIL OF LEGS f Benches for Pipe Fitters Are Rigid and Folded Collapsible Take Very Little Space When Collapsible Workbench Made of Pipe and Fittings While passing a plumbing and pipe fit- ting shop one day, I noticed a number of collapsible benches made of pipe and fit- tings. They were arranged so that, when set up, they would be rigid, which is usu- illvy not the case with collapsible benches, folded, they would e truck. The ind when take s+¢!1 very e space in tl supporting tramework consists of a number of lengths of pipe, tees, elbows, flanges and cou- plings, arranged as shown in the drawing. U-bolts used to hold 1 securely to the frame, as indicated.—Ir 1 are win Chesterfield, Chicago, Il. Cover Keeps Steering Wheels Clean : 1. . . 11 (aarage mechanics mav unintentionally O1 tne steering wheels of autos with reasv hands en moving e cars about. a oO avoid this, one Yarage a) Tl € pro- covers inclosing it. pieces Ol MECHANICS hem is sewed all around the edge to ceive a length of elastic tape, which kee; A large cl is also placed over the driver’s seat that the mechanic the cover firmly in place. will not soil it. Burlap Used on Poultry-House Nests and Roosts By covering the fronts of poultry with burlap curtains, the nests are ma | qiark, and therefore more attractive to hens. They are also a protection ag egg-eating, since the hens will not eat e; If they alre ' have the habit, thev can be broken of in darkened nests. ving providing the nests with the burlap cu: tains. These curtains should fall to wit] in 3 in. of the bottom of the nests, a each should have a V-shaped piece, 4 5 size, cut for air and a amount of li 5 in. in out ght. For nests used by sitti: hens, the curtain should be made to co the whole nest, a diamond-shaped piece ing cut out for air and light. The curta should be fastened with hooks, so that hen mav be released twice a dav for f water and exercise Weighted File Handle Prevents Breakag« A ball-shaped handle is often the convenient kind for small, light files. if the handle is weighted it will serve t] further purpose of preventing the file fr being easily , broken, especially on jobs where or- | dinary and lv heavy com- parative tools are used. If, inamoment of for- vetfulness,a heavy tool is dropped on the file, it will probably be broken, but a le prevents this, as it hown. 1 W eighted ) holds the in a vertical position as s No matt: ow it 1s laid down, it assumes this po lv. The \ hand ly tion automatical handle is mad in two sections, + one of metal and the o of wood, being joined by means of a scre rround to and afterward an approximat l ball shape. The file shank is stuck the wooden part.—Harry Moore, Mont real Que : Can.

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©PoPuLaAR MECHANICS A RE you pinching pennies and wait- *“ ing impatiently for the day to come vhen your bank account will be big enough to build and pay for the house of our dreams? If so, the following story may suggest ne way to keep down costs and thus en- ible you to begin now. Here is the story: A young man and his ife, living in a rented house on the out- skirts of a big city, had scraped and saved i tidy sum of money. They had skimped on the necessities and prayed for the day vhen they could give a builder an O. K. to go ahead with the job. They couldn’t vait longer. They wanted to get out from under the load of PLAN 5-S- 27 -An Easy Way to. Save $1500% started in life, studied books, shopped around for prices, with friends and builders. they went over their plan. ting they plan talked Time and again, They cut and pruned and eliminated almost everything within reason. But they couldn't get the price of the house down to th their savings. And then the voung man made a dis- e amount of rent. They wanted their own home, yet thev hadn’t suffi- cient cash to make the beginning. They here installed for $2. didn’t care to go into debt and go afford to build. ahead, Like thousands of voung couples get- A NEW SERVICE To help our readers get started on one of life's most glorious experiences—building and owning a home—Popular Mechanics Magazine will sup- ply readers a one-sheet blueprint of the house This blueprint does away with the necessity of first purchasing a com- plete set of plans to find out whether you can It contains floor plans, eleva- tions, a section, detail, size of joists, studs, etc., and also a brief specification. tradesmen and dealers for building estimates. covery. In studying estimates, he found that labor represented the cost about fiftv per cent of the total expense. He that individu- ally and collectively, the prices for build- Saw Submit it to ing materials and equipment were 1055 POPULAR MECHANICS ADVERTISING SECTION l

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1056 POPULAR MECHANICS very reasonable. in) Tact, O1 ly a slight where you Can do some of the work vou! increase over pre-war days. For example: self, there’s no easier or quicker way o Insulation would cost him in round num- saving money. This is especially true bers about $100; plumbing $300 or about smaller communities, suburbs and urba: localities where building ordinances at al less exacting than in the big cities. - I Finally, there is this to be said about HA > a” am AITCHEN 96"x 11-6” RANGE 1 building costs today. Labor i rene! lower in smaller towns and on the o Cios BED ROOM 10-6 'X 12° 6” tte TABLE skirts of medium-sized cities. Workm« are reliable. Thev have to live with thi work and meet their customers day aft: lay. Their reputation is at stake. TI aoe ( 7 e not flv-bv-nights. And buil y 12-6"X 10-6” terials, In some Cases, are apt to be lowe tcact +} ar » P 1 outside the larget centers of populatior Building-material costs are more favor able today than in many years. It can do a little work vourself. if vou have BED ROOM | 10°6 x 12°6” | ef : the job of handyman and helper. vou t 1 . ‘ LIVING ROOM e courage and time to buckle dow: ] 190 x 12’-9” may be able to pull the cost of your dre ome down to the size of a tolerab] le 24 ie! pocketbook. A oo oe 2 e pr — it S STONE STEPS ag - a a : | L) Ano TRIM GATE The house here illustrated is in n ati_c yan “1 1 1 ’ ‘ 1 +¢——____— OS Ge a > wavs like the house built bv the vou ——— : 1 1 man we opened this story with. It i SIX per cent; heat ng ; out five per cent. newer tvpe ot house that has come etc. As he studied these percentage e favor in the past few years. Its ance arrived at a decision. He saw that each away back, may have been Spar item was in reality a small one as com Italian. It is only reminiscent of tl | pared with the total cost. He further stvles. The plan provides complete liv found that, if in some iv he could cut quarters on the first floor—bungalo the cost for labor, he might be able to equipment, There are two be lrooms on build and pay for his home out of his sav- _ the second floor. ings and income. There is probably no more popular « l At d so he de ided to pull On a pair Of sal sfactory arrangement ot ] Ing al overalls and got ork on the job himsel dining rooms than the one offered here He kept a care ¢ ot evervtn By bringing the roof line down over the cluding 3 ere ul arched entrance at the rig the house , rough work he did himself. In othe made to appear wider and thus larger tl cases, he worked a elper to the expe tis. The chimney of native field stone. rienced tradesmen whom he hired. With while perhaps a bit theatrical, is neverthe- one good local carpenter and other specia! less in line with modern tendencies, and, ized laborers when he needed them, he with the field-stone entrance arch add Mal aged to stick it through. H hand an effective bit of decoration in contra 7 4 7 > aS - e s | were caliou ed. He 1 cked ug an occa- to the ImMplicitv or the walls. 1 4 1 . D> ma silver 1n I i put e ive a cool S] aK) b h sown labor and rot ni ome at a price he could afford he final EDITOR’S NOTE: Popular Mechanics Maga- 3 ‘ a : , Beye zine has prepared a new plan book, ‘““Twenty cost was in the neighborhood ot $4,000 Popular Low Cost Homes and Ten Command A verv re nahle ficnre And aratl ments for Home Builders.’"” These are selected \ ( ‘ is Ul. 1 pT ] : = homes and show labor, space and time-saving and hanpv owner ideas. They are $5,000 homes and less. Send t . ; ; 14 + 91 10 cents in stamps to cover postage. Address You 1 i 1 pe e to pu on overalis >. 573 4 Palils, suilding Editor. wing a hat er and push; If. how POPULAR MECHANICS ADVERTISING SECTION

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POPULAR MECHANICS ADVERTISING SECTION Gets dark early and light late —these are Radiolite

itches in one... watch and a night time service every hour of the four . . . that’s you get inan ll Radiolite. It e in the dark, es having the oll qualities of dependability od looks. Now its are long and ngs dark your ite will be more than ever. y watch or clock il- trated is not at your iler’s, it will be sent

Sugersot

Alarm clocks, too — = Ingersoll alarm clocks (FE Waterbury have the Ingersoll quali- Y wm, SS), Radiolite $6.00 < ties of sturdiness, depend-

if wele i movement Handsome engra\ ! =~ ability and good looks aesign.smatfti.« 4 < Chromium | fit The Type-T in plain dia at $1.50 comes in four case. Plat el, $5.00

charming colors to har- Cc monize with the popular kitchen color schemes Radiolite $2.25. And for bedroom use there is the dainty little Type-R Jr. Cnot illustrated). It comes in delicate jade green and rose pink moiré finish as well as nickel. Other Ingersoll Alarm Wrist Radiolite, $4.00 A wrist watch made to keep its depend- Clocks up to $ 1.50, ability and good looks under conditions of INGERSOLL WATCH CO., hp hard service. Millions in use. Plain dial New York Chicago $3.5 Si ancis model, $3.50. San Francisco

RADIOLITES Tell Time in the Dark Yankee Radiolite $2.25 Illustrated at left The “Old Reliable.” Sturdy—dependable, with many good looks features. Plain dial mode l, $1.50.

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POPULAR MECHANICS ADVERTISING SECTION

7% ~

Where working together is everything An . ldvertise nent of the 2 . BD heed bed _-_ = >|

American Telephone and Telegraph Co npany Tt ’ . - ; > ’ iT Is the aim of the Bel] Sy, tem tnat anvone anvwhere in Th le country can pick up a tele phone and talk to anyone anywhere else clearly and without dk lay. That is the meaning of universal ervice. To provide it, the means of ] ephoning must be uniformly good + « Ui. Each of the 24 operating companies of the Bell System has full access to all the } | ne improvements and n vethods that } r Leil are continually being m: There are workers on the staffs of the American Telephone and Tele graph Company and the Bell Labora- tories whose si le OcCU] ation is to de- velop constantly improving methods and equipment for the 3< em- ployees of the Bell System to use jn fal

serving the public. The not only in the extension lephone service across tl] Atlantic, but in the constantly in a | proving local and long distanc e servi at h me, The very nature of the teleph Udi business necessitates a single inter: nected system. The American Tel phone and Telegraph Company a cepts its responsibility for a nati wide telephone service as a publ trust. It is fundamental in the policy of tl Company that all earnings after reg lar dividends and a surplus for finan cial security be used to give more a! better service to the publi ; sults of the efforts are evident

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opular Mechanics Magazine 200 FE. Ontario Street, Chicago, U.S.A. H. H. WINDSOR, Founder H. H. WINDSOR, Jr., Editor and Publisher London: Hachette & Cie., Paris: Hachette & Cie., Melbourne: Gordon & Gorc! 16-17 King William Street, Charing Cross, W.C. 2 111 Rue Reaumur 509-513 Little Collins Se ISSUED MONTHLY SUBSCRIPTION: SINGLE COPY, 25 CENTS In United States and its possessions, also Canada, Cuba, and Mexico, per year, postpaid - $2.50 To all other countries in the Postal Union . - . . : - 3.00 All subscriptions are discontinued at expiration. Please examine the date printed on your wrapper. Entered as Second Clase Matter Sept. 15, 1903, at the Post Office at Chicago, Iilinois, under Act of Marci Entered as Second Class Matter at the Post Office Department, Canada ird, 1879 Pu monthly by POPULAR MECHANICS CO Copyright, ivzo,by Popular Mechanics Co Copyright in Australia. Copyright in France Vol. 50 Contents for December, 1928 No. 6 Special Features From Wood Burners to Steel Giants .: 898 Lighthouses of the Air 907 The World’s Most Famous Yachts 915 Glass House to Save Your Eyes . - 930 Amazing Story of the Talkies .. 938 Corn Flour to Run Autos 946 The Mystery of the Tides . .. , 954 Have You a Ninth Sense? 962 The Romance of Modern Logging . ; 970 Uncle Sam to Show Talking Cow . 7 978 Here Is Your Television Receiver 1004 ines Camping—kit holds chairs and serves as table 897 air yacht has all comforts of railroad pullman 937 Cemetery—for pets displays monuments to animals 928 Baby Bullet’”’ breaks speed marks 983 Chain—links easily parted 935 Diesel engine for in successful flight 926 Churn—spring mounted, mixes food, etc 975 ible-deck, to carry thirty-five passengers 1001 Clothing—made of cork 98° nidget plane without tail 992 Coins—Hawaiian half dollar a rare prize 989 x-mile-a-minute plane built in England O86 Deaf—sound-absorbing walls help to hear 912 ps Dentistry—probes wrapped by motor 961 R-100" built for transatlantic passenger service 987 Diamonds es—gathering is bitterest job 966 big, life story of to be filmed 935 red to fight boll weevil 967 diving for in sunken liner 934 German—fake tanks screen snipers 912 red, eighteen-carat found in South Africa 93° biles Dictaphone—words recorded on wire 977 ré ters to get coffee from service car 949 Earth—shape under sea gauged by submarine 968 ling foot-power develops high speed 925 Electrical Machinery—cooled with gas, more efficient 925 king table tests quality of car 984 Electricians’ Supplies—wire connector eliminates tape biles—Accessories and solder 913 otor air cleaner 952 Elevators—vacuum tubes give automatic control for 1000 eon tubes tell spark-plug troubles 905 Engines, Diesel—solid fuel used to run 988 biles—Driving Fire Escape—automatic rope holds 1,000 pounds 925 r-shift indicator aids beginners 945 Firemen—walk in water with rubber suit 92° ip plate for wheels helps out of ruts 905 Flashlight—worn on coat leaves hands free 988 1 Fort McHenry—restored by army 985 rplane takes non-stop record from birds 929 Fountain—shaped like Christmas tree ORE yerman air lines operate 40,000 miles daily 937 Fruit neon aerial beacon on skyscraper 999 easy tricks with 994 le—for children has sidecar 961 squeezer saves ice and protects hands 911 ind Boating Furniture it and boots combined 959 chairs slide easily over any floor 903 ilar metal, won't tip over 97¢€ combination desk and piano 999 electric elevator simplifies storing of 945 Furs—electric comb and iron for 959 bber life ring for rowboats 950 Games—bowling, rubber-tired disks used for 934 peed boat built like wingless seaplane 1000 Garage—turntable in front of 1006 g—disappearing ring in arena 935 Garage—Equipment—brush washes auto top 975 ges Gas—made from garbage to heat homes 992 ross Grand Canyon 989 Gas Mask—“‘sniffer™’ in factory tests 999 Ambassador, links U. S. and Canada 914 Geology—earth is slipping westward 904 ids, tests show strong as new 952 Golf ind-operated balance, still used in England 929 scorer worn on wrist 100! ta, Aerial—portable for still pictures 992 stroke meter measures length of drive 975 (Continued on Page 4] / POPULAR MECHANICS ADVERTISING SECTION 5

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[4] [Contents—Continued] Grape Vine—over century old Automobiles—Repairing—emergency repair on brak Heate linings keeps show-window glass clear 914 Automobiles—Tires—shields protect balloon or oversiz Q solar-heat machine 951 Bottles—emergency method of opening ) Household Devices agi Brush—homemade, for applying tar 8 Icebergs—coast-guard patrol tracks to la oF Chairs—how to tighten cane seats Insects—wire fence bar to 950 Chimney—drain tile is substitute for 4 Island—pirate, in Gulf of Mexico, to be moder 927 Christmas—make your own decorations Lamp-Posts—concrete, are spun 904 Clothesline—hoist for Lamp Shade—green-disk fits bulb 983 Concrete—white paint for 8 Logs—for paper, water ‘“‘watch dogs” guar 968 Corn Popper—improvised Lumbermen—model city for affords many ies Earthenware—repairing small cracks in Mail—collapsible case for Fans, Electric—fitting brushes on Mail Box—waterproof *loors—remedy for squeaking Meat Carver—holds joint while slicing Galoshes—how to get more wear from Mechanical Man—that moves and talks 960 Games—"“‘jitney golf’ played with old auto tires Memorial—war, chimney used as 951 Guitar—method of bracing Metal—new, for auto used 97 Heater, Gas—preheating water for Milk—in sheet form 951 Hinge—lock for loose pins } Mines and Mining—electrical prospecting holds hope House Numbers—preventing from discoloring paint for new mines 992 Ink—clip prevents blots when ruling Motor—valveless for airplanes, has few moving parts 897 Key Ring—serves as picture frame clamp Moving Picture—move wheat fields to get picture effect 953 Knots—you should know Neon Lamp—solves problem of high-speed macl 988 Linen Closet—pull-out shelf for Oil—-yields flavor of peaches and kind of soap 950 Measures and Measuring Instruments—measuring half Oysters—Uncle Sam guards 929 capacity of containers Paints and Painting—electric paint-spray gun 993 Paints and Painting Pancakes—automatic machine for 953 luminous paint on keyhole Parachute—jumper broadcasts during his descent O36 whitewash for various purposes Petroleum—world's, will last 3,000 years 905 Paper—made transparent for tracing Pipe—steam, seven-foot made by arc welding 966 Photographs—stage scenes from vacation pictures Poison—oxygen chamber saves cats affected by carbon Photography monoxide 913 five photos in one exposure 1 Radio flashlight used in taking pictures at night helpful hints from experts 1010 Pipes, Water — increasing range of voltmeter 1008 electric flatiron thaws frozen ) telephoto of dirigible “Count Zeppelin” 927 thawing out frozen to improve your set 1002 Polish—homemade stove Radio—Aerial—mounting loop on portable set 1014 Poultry : > adin-— Batteries automatic fountain for reducing charger noises 1014 — — method of cleaning nests testing, and power units 1009 Ship Models—shaping sails of , . . van . ‘ ’ Soldering—oil lamp heats iron Radio—Coils—r.f. chokes prevent distortic 1014 i Radio—Construction—kink for starting nuts 1008 Splicing—ends of short wire * ‘ Radio—Installation—wire holder simt lifes sc Idering 1009 ate alculating number of studs required Radio—Reception—improving the tone of old sets 1007 : Vindlass Spanish—pulls auto out of mud Radio—Television—latest apparatus in 1013 Wor o—wates glass as filler as ; 7 a Min Sdn Wood, Kindling—barrel hoop holds wood while ch homemade line voltage control 1009 _ ’ screen-grid requirements 1008 - Railroads SHOP NOTES baggage car to carry autos 989 train to control wheat smut 945 Automobiles Railway—in front yard attracts visitors 935 auto used as tractor on ice : Razor cover keeps steering wheels clean blade stropper uses two steel balls 952 Automobiles—Radiators—preventing from freezing rest helps blades regain edge 993 Automobiles— Repairing Safety Devices and Measures—chains for shoes to pre- useful tools for tire-chains vent winter accidents o7F valve-seating tool made from old valve School—shop for boys of old street cars 961 ananas—cover keeps frost from Seesaw—spring operated for babies 953 Belts—emergency lacing for Ships and Shipping Calipers—rough and finish special boats for autos 937 Draftsmen—simple rack for whaler hauls carcasses aboard 069 Excavation—cellar door idea employed in Silk—made from cotton lint O75 File—weighted handle prevents breakage Siphon—automatic OR4 Furniture S vater skiing. new summer sport ORS combination seat, cabinet and workbench Stereopticon—combined with phonograph O3¢ ; how to refinish : 0: Sugar Cane—new, flyers find in New Guinea 977 Gear—rey air for broken tooth , Telephone—ounce of metal saves millions 960 Glass—working in machines —_ Tows Hose—on street protected by pive , ‘ an Iron—structural, fixture for bending electric auto follows fence for power 2¢ ae ae bm , hobbyhorse that walks, newest 913 organ ¢ Tetascapg ger Resear Vaporizer—electric, automatic 88 = ey de Benge ee eee Walls—circular, of concrete 7 a a oo Warfare—‘‘magic curtain’’ of chemical hides city fron Pipe oli nc aig F ae R07 I aner—used as a press X-Rays—movies show bone knitting 912 4 — wap USed On nests end resets Pulleys—overhead, measuring - . Pump—inclosure prevents from freezir R AMATEUR MECHANICS a Sa: TO Sas aps Ship Model—hints for builders Auger—spring prevents from “running” 8 Soldering—lead joints Automobiles Tap—acid helps remove broken care of your auto generator 8 Tape—adhesive, curtain rod holds Ise yrrect type of spark plug O3¢ Tracks—portable, useful in driving over soft lawns Automobiles—Accessories—celluloid on windshield pre Wallpaper—how to maké wash vents steaming 1028 Workbench Automobiles—Radiators—shield prevents spilling al collapsible, made of pines hol on ] ble, handy drawer 6 POPULAR MECHANICS ADVERTISING SECTION

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POPULAR MECHANICS ADVERTISING SECTION § DRAKE'S wecianicat BOOKS

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POPULAR MECHANICS ADVERTISING SECTION 7

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6 POPULAR MECHANICS Are YOU a Business Coward? —and—does it show in your pay-check? ‘You've fad your chance! It was the General Ma anager speaking . ‘Two years ago 1 warned you that the only man who could hope to get ahead in this organization was the man with training. ‘Merwin was only a bookkeeper then, you re- member, but in his spare time he was studying Higher Acco uuntancy. / knew what he was doing, and I told you then éo keep your eye on Merwin. ‘‘He’s had three raises since. He has more than coubled his salary—and he earns every dollar I pay him. ‘*Last week I recommended him for Assistant Treasurer, and the Board elected him without a dissenting vote. We're mighty glad to have him in the group. “But you, Jarvis—I hate to say it—you're a business coward. You knew what you would have to do to get out of the small-pay class. You were simply afraid to face the kind of effort and responsi bi ility that could get you a subst antié il salary. ‘‘And now it’s too late. We've got to cut our overhead, and you're one of about fifty men that we Can get along without. Ve could replace the lot of you tomorrow. ‘*For your own sake, Jarvis, take a tip from a man who has been through the mill, and //7s time get busy and learn to do something better than the other fellow. ‘‘Jarvis, there’s zo end of opportunity in business; but the only man a cashes in these days is the man with the courage to get spec ‘ial training. The offices of this c onary are simply cluttered up with business cowards. It's easy for the man who /vamms —because the business coward is through before he Sstarts.’’ Are YOU one of several million routine men who have been drifting along in a ‘‘low-pay’’ job— always wishing for more money, never acting? Are YOU a business coward? Over 640,000 ambitious men have asked them- selves this question during the past nineteen years —and replied with a ringing ‘‘NO!’’ In the quiet of their own ben S,

* * * without losing an hour from we ork, these men have mastered the principles of business by working out the ac/ual problems of business—under the direction of some of the ablest business men in their respective fields in America. Their record of achievement, the ‘‘LaSalle Problem Method,’’ thrilling chapters in the romance of business. These men were able to progress more rapidly by means of the ‘‘LaSalle Problem Method’’ than they could have done in any other way, because in their training they faced continually the very prob- lems they must later face on the bigger job. Zhe , learned by aoing. under is one of the most Moreover, studying alone under the direct super- vision of an expert Instructor, they progressed as 8 POPULAR MECHANICS ADVERTISING SECTION ADVERTISIN YG SECTION

rapidly as their om yacity allowed—and that pr as further speeded by the fact that every day ~~ could see themselves developing. This fact il the hardship out of study —changed it iscinating game, with always the goal ahe - increased opportunity and greater pay. W oe attitude you may have taken i: past, resolve today to face the problem of business future sguare/y. Within reach of your hand is a LaSalle c and apen. If the pen isn’t handy, a pencil wv ust as well. The coupon, checked and sign: bring you without obligation a complete out the training you are interested in, togethe full particulars of our convenient payment also your free copy of the inspiring book, Years’ Promotion in One.” It costs you nothing to get the facts—exc« exercise of business courage. Will you put it put wt over? Mail the coupon NOW. — Name SR cincehininsiciccniictinnbaipaiiaiinaiaecaiaaniand Address

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POPULAR MECHANICS ADVERTISING SECTION 2 BEG ERrOle Complete Study Course and Pocket Library*10 yer in SHIPPED FREE how to do any job the eering at your finger tips Therefore your It is the ruling force of to- is de pe ndent on ele« tricity. In- all you need to know about w weeks. Hundreds of our 7, > ra A set of HAWKINS \ _ GUIDES is a true right way—without guess- incement in the electrical field are unlimited. day—transportation, com- dustry is crying for electrical electricity in easy, step-by-step a fe us and told us this! friend to the electri- ing or taking chances. HAWKINS GUIDES DOUBLE YOUR VALUE heat, power men that know their jobs! Lo oeeee Miata ania ties seal READERS OF HAWKINS GUIDES KNOW HOW cal worker. It tells you Hawkins Guides put all the facts about mod- Electricity is king! eee | ed ¢ very 1 odern ictivity Hawkins Guides teach you ; will greatly in« rease your V alue to y irself Is have written a , “You can’t stump him on an electrical job.” “He certainly knows his busit : “Certainly have t hand it to him for knowing how.” —These are the things er pl vers i it our friends who are iiers of Hawkins Guides, utter what question or prob- | ymes up the Ready Ref- erence Index enables you to ean expert answer at once f HAWKINS STARTS / /7)\\ \\ YOU WHERE OTH- AtL\\- ERS LEFT OFF Why should you work at low wages when ¢ of HAWKINS GUIDES will give you > the money-making knowledge of the ex- t Ea daily read of the Guides w i 1 1a tew nt! v it it has taken the expert With HAWKINS GUIDES in hand you have a running start to success in the electrical fiel 1 will actually begin where others left off! NOW! This coupon isyour golden opportunity. Tear it out— send it now! FOR EXAMINATION! REAL ELECTRICAL EDUCATORS “Hawkins Guide t $10 is the best invest I have ever made Ar ble to take up al t any electrical »b and have never gone to an electrical s« l B. Roessler, Oenaville, Texas. AS EASY AS A. B. C. “Everything in Hawkins Guides is very plain and anybod can read and understand them easy 1. B. C."—J. Kaight, Tobyhanna, Pa. OTHER ENTHUSIASTIC READERS SAY “Worth ten times their price Helped m«¢ ) » raises in months.” Better than a school of instructior Studied n I was laid ut 1 got further ead than if I had been Hawkins Guides Explain These Points So You Can Easily Understand:— Magnetism—Induction—Experiments—Dynamos—Electric Machinery —Motors—Armatures—Armature Windings—In- stalling of Dynamos—Electrical Instrument Testing—Prac- tical Mz«agement of Dynamos and Motors— Distribution Systems—Wiring—Wiring Diagrams—Sign Flashers—Stor- age Batteries—Principles of Alternating Currents and Alternators— Alternating Current Motors—Transformers Converters—Rectifiers—Alternating Current Systems—Cir- cuit Breakers— Measuring Instruments—Switch Boards Wiring—PowerStations—Installing—Telephone—Telegraph Wireless—Bells—Lighting—Railways. Also many Modern Practical Applications of Llectricity and Ready Reference Index. Hawkins Guides—v Mt ws Each number easy to carry around and read in spare time. Big type and clear diagrams. Easy to study and lear Durable, flex t 1 edges 3,500 pages—4,700 illustrat Shipped free for exami- nation. Pay $1 I th if fied. Pr f set Hawnsnss wns Feeney wi Gust Coot Cot Cor v4 EXAMINE GUIDES FREE! Y | tist A r t t i l I TOW! POPULAR MECHANICS Theo. Audel & Co., 65 W. 23rd St., New York City Electrical Guides, Name . eon . eeceee coerce seseseresseeeese CS ee ee eee ee ee rT Occupation . .. . 6 cece ccc cnc e ern e eee e eee eens seen asses eeeeee Employed by ADVERTISING SECTION 9

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S POPULAR MECHANICS ADVERTISING SECTION Hho “AYEAR “ore 6 Start toMake & a | Money Quick Oe Like Morriston W. Va. (photo at rig ‘ \ FREE AUTO ~ M. J. MORRISTON, The World’s biggest, L do! "© Parhoraburg..W.¥a most poner business needs you! \ Som noose t Mave gad o8 Sunam Cease another minete— Ne Other “JOB- war Training! \ ¥ band 1'll tel ou at home in mehades Al Po) wer our spare time for po is . ¢ ting ting ‘ niin ite d opportunities for trained Electrical nd " mn, Velding ~ ghiting \ -- L te. \ * Me il Auto Expert Let me show ou how my ss Course also Me nthly Mag \ . JOB WAY training has prepared hundreds of men , ! resting and R r Outfit 1 like urself for a quick, brilliant success in the Auto Nowhere el I know Sine f, can you g ALI Earn Ue to $150 a Week! ** bition donars sven | AVIATION to repair 18 Don't se your time for low pay! You don't need to Mi o1 Autos Frucks Training FREE hen ou ha my JOB-WAY training As Tractors—it's the of extra cost Direct ng Engineer of this Institutio I know hat world’s biggest busi oupon bring s full de t ining you need to succeed AND LGIVI Yo THAT es 4 ing ey t salir el my e Avi rRAINING right in your own home MASTER every port everyw . tion rr ain ng, I am ranch of Auto, Truck and rt r work I train u ‘ ee ee offering FREF of ex vith JOBS—not boo I he origir JOB t harge. Senditnow. WAY training TO YOUR HOME ! Read My Experience, Education Get My Big Book Agreement! Not Needed! sali Quick! ren i : n nh my I don't i hool rd Vill scnhnd to you big free Auto Bool you have will train you to be it one penny of MAIL THIS COUPON NOW! N 1 I will refund on n Aut M I l all the facts : ! ir I I ] it the de : oa n of ned Aut Garage owner perts. Let me tell Free Auto Book per ) asily ! Expert Bie PAY you, t ma B. W. COOKE, Directing Engineer, oF CF com - : . - Au . Chicago Motor Training Corp 4 JOl = 1 trait : 1 did offer Dept. 1169, 1916 Sunnyside Avenue, Ch ! ’ will advantage e of t ndi Send me FREI ir Big Auto I Fact ind proof that you will train time at \ I Comp ( rse al resting and Repair Out Add M DIRECTING ress Me B. W. COOKE 2 ENGINEER CHICAGO MOTOR TRAINING CORPORATION 1916 Sunnyside Ave., Dept. 1169 CHICAGO, ILL. ) POPULAR MECHANICS ADVERTISING SECTION

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| POPULAR MECHANICS ADVERTISING SECTION FORMER PLASTERER NOW MAKING $12,000 A YEAR a = 7 ph a a a ee Na OL LN el orked for Small Salary ry J. Beilman had little education ttle opportunity to get ahead, but refused to give up. Deep within vas the longing to make something life before it was too late—to 1 building some day instead of ng around it as a plasterer or bricklayer. | Resolves to Earn More Money “If spare time study can help other men to get out of the rut,’’ he said, ‘‘it can help me. I'm going to take up a course with the International Correspon- dence Schools and study at home. It’s the only way I can ever hope te put myself on a par with technically trained men.”* SG Sssss ty 0 Y > y, SGV Nj; Yo Gets Offer from Contractor Beilman’s friends laughed at him and said he was wasting his time, but he kept right on studying, for he could see how the course was helping him in his work. Soon one of the leading con- tractors heard about “this bright young man’’ and made him superintendent at a fine increase in salary. LLLP DODD OD DOD ODD DOPOD OF DF DOT IOSD DDD DODO a Se eee | in went ahead so rapidly that he ed to start a business of his own. et with unusual success from the start and today his income is than $12,000 a year.” Recently ndied the contracting work of the $300,000 Chamber of Commerce building in Scranton. =a UMUTLLL Glad He Studied at Home “I give the International Correspondence Schools full credit for my success,’’ Mr. Beilman writes; “‘there is nothing bet- ter for the man who has been deprived of the advantages of a college educa- tion. Many of my friends also give the I. C. S. full credit for their ability to do their work efficiently and well.”’ The Henry J. today Secret of His Success Beilman is a successful man because he had vision—ambition and perseverance. He realized that he had to learn more before he could earn more. Instead of just drifting along, he picked a definite goal and then worked and strived until he made his dreams come true —~ +} ut cost or obligation, please send me a copy of your booklet, ‘Who Wins and Why,” and full particulars about irse bejore which 1 have marked X in the list below: BUSINESS TRAINING COURSES s Management CiCost Accounting () Business Corresponder M « rier trial Manageme Bookkeepilr LJShow Card and S ( s s S$ 1] Management St rial Wer Letterir s s Management Spanish 0 French Stenography and Typing ting and _ Sale shiy English [) Civil Service C.P.A. ching Advertising Railway Mail Clerk l Dealer TECHNICAL AND INDUSTRIAL COURSES itect Electric Car Runnit [) Automobile Work on y Engineer tectural Draftsman Tele iph Engineer {jAirplane Engines [JChemistry () Pha Ti ing Foreman Telephone Work }Plumber and Steam Fitter {]Mining Engineer rete Builder Mechanical Engineer Plumbing Inspector }Navigation () Assayer actor and Builder Mechanical Draftsman Foreman Plumber Iron and Steel Worker iral Draftsman Machine Shop Practice Heating and Ventilatior \rextile Overseer or Supt. ral Engineer Toolmaker [© Patternmaker Sheet-Metal Worker Cotton Manufacturing ical Engineer Civil Engineer Steam Engineer Woolen Manufact : rical Contractor Surveyi Marine Encineer Agriculture Fruit Growing } tric Wiring Bridge gir Refrigeration Engineer Poultry Farmir tric Lighting _Gas Engine Operating R. R. Positions Mathemat Radio Ad tre State ‘ ectmenitiaiei naa ‘ aS ( = — ) ee a ee ee FPF FFF FFD OFF FFF FFF FFF FFF, “‘The Universal University’’ Scranton, Penna, — — —, i i a _ _ _ _ _____- _ _ __ ___ O_O LDF FFF INTERNATIONAL CORRESPONDENCE SCHOOLS, Box 5579-F, POPULAR MECHANICS ADVERTISING SECTION 11

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10 POPULAR MECHANICS ADVERTISING SECTION Do Unseen Hands Keep You Dumb.. When You Ought to Talk? Flow often have you wanted tot ilk, bute held hack, silent, becaus« felt unequal to the other people present? How many times have you passed up, or avoided the chance to talk in public—before your business asso ates, your club or lodge, because of your fear of stage fright?) Are yoy afraid of your own voice—instead of being able to use it as one of th greatest business and social assets in your possession? And yet you migh be surprised to hear that many of the most brilliant public speakers have today felt exactly this way—before they learned how to develop their “hidden knack” of powerful speech—a knack which authorities say sever men out of every ten actually possess. And the chances are that you, too have in vou the power of effective speech—which, if unloosed, would by almost priceless to you in a social or business way. Find out if you hay: this natural gift—read every word of the message below. Discover These Easy Secrets of Effective Speech ROBABLY you have never 2 method that | ilre pictured yourself being ble tl isan fror mea ‘ r .

»sweep a giant audience it t p t I {f greats pre ts feet—to win the pplause t v1 roi ie! rh new I thousands Yet, the me who so delightfulls mple and ¢ are doing such things know that by spendi: 20 minutes d is‘ all astor ngly easy r i pr wn hor ire n p SCSS1OI th my r ma pid prog of effective speec! Before you leat Hlow you can use this met these secrets you may ' i can | 1 the f fs aps Sood ad- What 20 Minutes a Day ness and | dressing a small audi- Will Show You quickly shas " How to address business 1 iw - ence. Still it all seems

: How to propose and resp Baie , tae» acu nstitute speaker — a brilliant, Dept. 1359 , . ' ersationalist (ne 3601 Michigan Ave. Chica “pe minent specialist — ‘ h ha | " | . I > North American Institute | 3601 Michigan Ave., Dept. 1359 | Chicago, Hlinois.

| 9 copy of Four inspiring bookiet / Sow Ko Work / “How to Work Wonders | we VA With Words” Address (= : ee | Mail Coupon Today |

12 POPULAR MECHANICS ADVERTISING SECTION

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POPULAR MECHANICS ADVERTISING SECTION 1] pearn Electrictty ) in Great Shops! ' ~~

| é ‘Not by Correspondence® = gj All PRACTICAL Workat}

EARN BIG PAY Learn to Earn $200 to $800 a Month Why work forsmall pay? Why make $25.00 or $30.00 or even $40.00 a week in a hard job doing dirty, disagreeable work, nd never sure of your job? Asa TRAINE D ELECTRICAL EXPERT you can command $200.00 to $800.00 a month. Y ou willdo pleasant work, and many jobs give you an opportunity to travel. Advancement will be quk k—steady work the year around. YOUR SERVICES Ww ILLALW AYSBEIN DE MAND any place, or you can own your own business, Not by Bocks—You Do SPECIAL OFFER Actual Work NOW I don’t teach you a lot of useless theory. I give For a short time I will include m ye — you_a useable knowledge on the same kind and Automotive Electrical Cour of Electrical Machinery as used in Power e “ng 4 . r.. Houses, plants and big industrial businesses. j ARC DB SL r 7 & ig X bt cs) for ashort time only. % » H.C. Lewis You Don’t Need Education

= or Previous Experience Earn While COYNE. I di nt require that you have a lot of book H. C. Lewis, Pres. You Learn Electrical Schoo) earning. You don’t need advanced educa- : 500 n or any previous education to master my My E mt toymn nt De partme nt w as st you in se- S. Paulina St. course. Put your faith in me and I'll make = {Puin oP and willaselst eon t com iekcoen Dect 98-72. Ct ; you independent and happy. why and any time there after i r lif < cet elias sail wie COYNE "2crmc= Get My Free Be Book Woe apie Be Dept. 98-72, 500 S. Paulina St. wi over. 100 actned phewgraghs S ™ Name

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4 POPULAR MECHANICS ADVERTISING SECTION 12

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12 POPULAR MECHANICS ADVERTISING SECTION

incAuto Painting ’ a a rr - > y : > Average $75 a Week for Yourself! \ie you satisfied with your present: — and income? If you are beginning to see how utte rly ag ree © it is to get along in this tough old

world without trainine—then I have the best proposition you have ever heard of. ll take you Auer as you are and in a short while I'll have you ready to manage and own one of my chain of auto-paint sh L0ps — . ° . > G King Frenklir painting 1s the best end of the ereat auto indus try. Short hours Superintende work—big pay ’ We Furnish All Equipment » Heret3 Free Lessons! While you are preparing for this big chance as owner and manager « A h P intir ee of a paint shop in your locality—I \ Ho \in u Oo al I am going to furnish you with every Just to prove that this isn’t too good t bit of equipment you will need to at true—I want to send you absolut 4 rl learn—13 BIG OUTFITS FREE of extra ei charge or obligation, 3 free lessor cost. And every outfit complete sO VOU e Ni 7 painting. I want vou to see how easy 0 get the actual practice in every operation. wor" \ system is—I want you to know how inter This is not just theory—no long, tiresom <- | . , Wn ME! Don’t worry about money—I’'ll furnish \ ar own’? \ LEARN AT HO: I se that. What I want is men who will learn ae suest \ You don’t have to give up any of the to manage and operate a shop in their town vou are doing at present ' keep according to my system. I'll have your . \} Have vour fun. All I want is a few mit name on a growing, profitable auto paint — S dav of vour time—no more. I find I « shop in no time if you mean business — better results training a man in his own | where there is ne thing to divide his at I haven't the space here to tell vou this wonderful opportunity, but I do say vou are a normal red-blooded fellow \ bition and desires for the better things hi re 1s the bigg st and best ch ince vol had to make your dreams come true Just mail the coupon—filled in witl

GET TH G. King Franklin, Supt. American Auto Painting School Dept. 2101, 425 S. Ashland Ave., Chicago

S all | I i D t e, als and address—and I'll send you a big bool p Plat lining this proposition fully and 3 Lessor FREE. Be fair to yourself and get con DUM, cc necincindtabckabendiosncdsoniqutinbsamedeiee cea details. Come on—do it NOW. G. King Franklin, Supt. 5 B On. cccccccccsecstocendésccanseneeeecceesoceesessetesus . . +r +. + eo AMERICAN AUTO PAINTING SCHOOL DG eiaecenvesl inacadverdessssises Stat Dept. 2101, 425 S. Ashland Ave., Chicazo 14 POPULAR MECHANICS ADVERTISING SECTION

Th

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POPULAR MECHANICS ADVERTISING SECTION 13 “AVIATION GUIDE’’ Given F ree! For a limited time only we will give Major PAGE’S sensational “best seller’? among aviation books—absolutely free with our Auto Encyclopedia. Thousands of men have each paid $2.00 in cold cash for this great flying hand-book, but you can have one WITHOUT COST if you act promptly. Mail coupon, send no money. Mail the coupon and we will send you a set of these remarkable auto books, just off the press. W he the r you are mec hanic or he ‘Iper, expert or student, owner or driver—if you're interested in autos by all means take AVIATION for Lo see BEGINNERS! ges, 140 illustrations, tions and answers on Everything about | AY advantage of this opportunity and USE the latest and most com- plete reference work on autos ever published sult America’s greatest Automotive Engineers. So denn i illustrated with pictures, charts, diagrams with little schooling can understand every fact yet thousands of eng rineers, service-station superintendents so clear, and blue prints tl by eighteen ol so fully ateven men in daily use hy and shop bore flying explained in lage, pict ires and dia- r auti il tert me e@x- ~ men as the Most Gc le pe ndable reference enc velo pedi edition includes straight eights, e es ind airships, bles. Elementary Y in airplane flies, functions, fuel- ear, wing design power require- ngines, propellers ntrol, et writ r Prepares for d-work, | ea th The 1 tr z£D r t 1 These Books Tell HOW! on-dollar a naustry to men with enough to ll branches ve mechan- bigger pay offers ourself and get a share re waiting for any man who even half ibility to deliver service And here's the eapest Way no studying, no memoriz “ r examinations At a small fraction of Urse Just LOOK UP the facts you the answer to ar suto pre blem literally e remarkable ‘JIFFY INDEX, now a " Mail coupon quick, and get with these books 2) American Technical Society 5) Dept. A-919, Drexel Ave. & 58th St., Chicago, Illinois encycloped GUIDE free POPULAR MECHANICS ADVERTISING SECTION SHIMMY in steering? an you vour fir + on ENGINE TROUBLI nstantly available. The new four- wheel brakes of all types, high mpressior i other features ol 2400 | ges er 4088) grams and biue-priots Can You FIX IT? erentials? ( reset TIMING? ¢ or tinkering? Can you pu he STARTER off and fix it? ¢ ou adjust and repair t! S ssions, rear-axles ectriu i] syste! s? ( in y it ine emerge repairs I t ad or are 1 helpless when some little tl g goes wrong? I ur hand always in your pocket, paying, paying, paying? American Technical Society, Dept. A-919 Drexel Ave Chicago, Ill B00 K FREE} and 58th St $ I without cost Name Address Employer's Name Employer's Address

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POPULAR MECHANICS ADVERTISING SECTION EARLE E. LIEDERMAN, The Muscle Builder Author of “Science of Wrestling,” ‘‘Muscle Building,” “Secrets of Strength,” “‘Here’s Health,”? “Endurance POPULAR MECHANICS ADVERTISING SECTION . —|

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POPULAR MECHANICS ADVERTISING SECTION 15 j| Mall This Man! ‘HERE’S a devil inside of you. He’s trying to kill you. Look out for him! He ells you et to work so hard. What’s the use? the bc ss Only piles more work on He tells you not to bother with your body. If you’re weak—you always will eak. Exercise is just a lot of rot. Do you recognize him? Of course you do. in us all. He’s a murderer of ambition. He’s a liar and a fool. Kill him! If you t, he will kill you. Saved hank your lucky stars you have another man inside of you. He’s the human dy- no. He fills you full of pep and ambition. He keeps you alive—on fire. He urges on in your daily tasks. He makes you strive for bigger and better things to do. He makes you crave for life and strength. He teaches you that the weak fall by the de, but the strong succeed. He shows you exercise builds live tissue — live tissue is le muscle means strength — strength is Power brings success! That’s W hat you and gosh darn your old hide! you’re going it Which Man Will It Be? s up to you. Set your own future. You t to be the Human Dynamo? Fine! Well, vet busy. That’s where I comein. That’s b. Here’s what I'll do for you: ist 30 days I'll increase your arm one full th real live, animated muscle. Yes, and id two inches to your chest in the same Pretty good, eh? That’s nothing. Now the works. I'll build up your shoulders. leepen your chest. I'll strengthen your body. I'll give you arms and legs like I'll literally pack muscle up your stom- nd down your back. Meanwhile I'll work se inner muscles surrounding your vital You'll feel the thrill of life shooting up d backbone and th roughout your entire You'll feel so ful | of life you will shout rid, “‘I’m a man and I can prove it! ids good, what? But listen! That isn’t I’m not just promising these things. J gzar- em! It’sasure bet. Oh, boy! Let’s ride. Send For My New OF Page Sage IT IS FREE do vou think of 1 ‘ I don’t ask one cent And it geeooencesssoscncecsscessscoscssocsscssssseseseossssssssessssesy iest piece of reading vou ever laid your eves on. 1 . - EARLE E. LIEDERMAN H blink an eyelash till howe “ ioe ed the last : It Bo i Dept. 2012, 305 Broadway, New York City H And there’s 48 full-page photos of myself and some of H SE! ON Dear Sir Please send n : T pupil T} the nest art galle of strong H Is hy -_ 2 we witho : d ery li one of thuas ta chaution _ : PENNY ws y Fe EI > etentow , ° oO r If u con t ge q i out of th . . » * ‘ } ‘* 4 : I bett ver you're ne a on then : F -. TD. a ee - : he d pen or pencil and sign your name and addres . NAT Al : De itn you haven't a stamp, a rostal will do. But : R ADDRESS N H 0 Y ro row you may forget. Remember . : H ngs attached, no obligation. ¢ : E ONA . : POSTAL : EARLE E. LIEDERMAN E | WILL DO j © : Dept. 2012, 305 Broadway, New York City

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Before Kenneth McCarty Mailed that Coupon He was an $18 2° Clerk~ Today fet His Income is $8529 a Week. After completing the course he wrote us: Yours is the finest cot presented for the Ten r Ba Before I enrolled with you, I knew nothing whatever about music I was earning $18.00 weekly clerkinginastore. Little did I realize the opportunity — had come. | took up the ‘ just for fun. But here I

irse ever, Play for Fun or $5, 000 a Year

Whether as $65 to $100 ar reo in one of the best t wee or SI me tis e playing rchestras in Western Michigan at $5, S10, Sloormorea night and making $85.00 a week. rests er not ink o np a a 4 Your course and your kiod co for yu In one ae is we can tr t ype ea have mac eC me &@ pro- " » to play this mar- fessional Tenor Banjoist melodious instrument nm McCarty,. Parkvi e eusy sk ill that will Jot South Haven, Mich i the envy of all othe nk, t 0, of the pleas re g able to expre Ss your elf

You Get Phonograph

! y when e ye , You're passing up the best t mes of R d T . ir life if you pass up an op- ecor s, 90 rtunity like this to learn at feyery selection of the tht cost and with no incon- eourse. fifty-five in all < wo cor es to you on a pho- : " nograph rec rd You I hear the ins tr ictor’s re about The Play-\ € playing justasthough quickest, surest short-« . he were right at your devised to social 1 profe de. The Play-Way il success is different, inter- sting, FOOL ‘FREE Book PROOF. Get the di news the Tells How apon brings. SY ND FOR end at once for rhe Play- [1 NOW! V »pularit ind P varn al OU

A. F. Bloch, President, NEW YORK ACADEMY OF MUSIC, Studio 1123, 100 Fifth Avenue, New York City. Send me the book that started Met No obligation whatsvever on my part 1 ‘ | 5 t 8 understand ] i Me eee ee er re ee ' t | POPULAR MECHANICS ADVERTISING SECTION

THE CHICAGO DAILY NEWS School and College Bureau

Offers You Its Specialized Services in Choosing a School Last year the School and College Burea The Chicago Daily News saved busy parents and questioning and both time and worry by sending them prompt, reliable information about just the kind of school they wanted personal requirements as to location and tuition charges being individual case. boys girls considered in eac] rai his ar x no Onle | Again this year many young people wi be perplexed by the problem of finding the right school. Why not let us help you? The Chicago Daily News maintains this service absolutely free of charge to yor No need hurriedly select a school advice can be Dearborn 1111, sonal interview at THE CHICAGO DAILY NEWS School and College Bureau Dept. K, 15 N. Wells St., Chicago, Illinois mere hearsay when expert obtained by telephoning writin for g or calling a pel

Big Money for You as an Automobile Mechanic These four practical } por ks, written by five well now ers of automobile practice, will teach you right i: home during your leisure time just what you need t about automobile troubles and repair They will te aut obile constructio! maintenance and repair as pl by onpunte and will he Ip you to earn in expert's pay Practical Automobile Library: Four Books—$1.50 in 10 days and $2 monthly for 6 months——only $13.50 in all! Hundreds hundredsof ¢ of question-answering diagr

marked illustration make the be Hain and readil standable ay u re explanations an criptions are clea direct Ever lapter is packed with ¢ nite, step te] do-it inforn akion Here is your opportunity to enter a big-pa Send No Money FREE TRIAL Mail the Coupon

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POPULAR MECHAWICS ADVERTISING SECTION 17 A Coupon That Has Meant Real Money ¢] To More Than 20,000 é ~| Ambitious Men! Bini

+ .«? al Salesmen’s Training Ass'n., A. Building, Chicago, Ilinois. ‘oa thout cost or obligation, send me a fre Modern Salesmanship Dept. W-101, wa $1000 A WEEK : i $10,000 A YEAR ae | |} Who Fise Wants to Raise Their : Pay 700% or More?

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18 We Will Train You in a Few Months Day and Night Schools in Chicago, Detroit, Cleveland, Boston, Phila. Tune in WBBM (389.4 Meters) for McCarrie hour each 1% at 8:30 P.M. Central Standard Time Up To “pee A WEEK as MECHANICAL DENTISTS We teach you to make rub- ber plates, crowns, bridge work, metal base dentures, etc., for dentists. After graduating you are ready for a job or can open your own laboratory. We assist you. Big Demand for Men! Mechanical Dentistry is the laboratory bench work which the dentist turns over to the laboratory worker. Master this profession and help meet the demand of 64,000 dentists for laboratory work. Every city and every town where dentists are located offers work to the mechanical dentist. We train you in a few months in day or night school for this uncrowded field—no classes—no books—no mechanical ex- perience necessary. Work Your Way Thru School We will help you find a job to meet your expenses while taking our training. And we will help you find satisfactory living quarters when you arrive. Schools located in Chicago, Detroit, Cleveland, Boston, Philadelphia. Day and night schools. INTERESTING FREE BOOK Our illustrated free book on Mechanical “Dentistry will acquaint you with some surprisingly interesting facts. It tells about the thriving profession of Mechanical Dentistry—the way to swift and certain success. And it tells about the progress of many of our graduates—men who have suc- ceeded beyond their expectations, also full details of our liberal offers. Mail the coupon and find out more about this fascinating opportunity. McCarrie School of Mechanical Dentistry 1338 S. Michigan Ave., Dept. 192, Chicago, II. Pee SF eS SSS eee eee McCARRIE SCHOOL OF MECHANICAL DENTISTRY i 1338 S. Michigan Ave., Dept. 192. Chicago. Without cost or obligation, send me your illustrated book on in formation ¢ plete i i i i] oratory work. | i i t i i ] at Bee ee ee ee ee DODYMTl’Y AD weerwmwanrra | | | , —. /. eae oak o Bc ck eae tes POPULAR MECHANICS ADVERTISING SECTION Young men needed py Davey Tree Expert Co. Interesting, vigorous outdoor work in a growing orga. ization where merit wins advancement. Good startin wages. Permanent positions and a real future for m« who make good. Our present field force of Davey T: Experts cannot meet the increasing demand. So we ar selecting now, to enter our employ, a few sturdy, clean young men, thorough Americans, single, between 20 and 30 years old, free to travel, industrious, with good pra tical education, and able to give good references. Write for qualification blank to serve in place of persona! in terview. The Davey Tree Expert Co., Inc., 142 Federal Bidg., Kent, Ohio. Electrical Engineering Students stall ronstruct motors test ele Course for men of ambition and limited time. Over 5000 wiring, men trained Condensed machinery. Course desig! co ourse in Theoretical completed ir Practical Elec- college year. Prepare trical Engineering in- for your professior cluding the closely the most interesting related subjects of city in the w Mathematics and Est. 1893 ( Mechanical Bliss Electrical School 122 Takoma Ave., Washington, Drawing. on request. Learn Watchwork, Jewelry work and Engraving A fine trade comma a good salary, and your indemand. Address Horological, Dept. P, | PEORIA, ILLINOIS, for our latest catalog. alway Institute, 4 TAMMER Write for my free book “‘Millard’s Advan Natural Corrective Course’ and a free copy my speech magazine. 10,000 cases successfully treat« Est. 24 years. Largest school for stammerers in world. Millard Last. of Normal Speech, 2317 Millard d Bidg., Milwaukee, Wis. | “ ) No talent or experience necessary. Fascinating work. Pays b sete instruction book tells Ae Alpha vets, ‘Co ors, How to Miz Paints, Show Cards, Window Board and Wall Signs, Ready made letters, Gilding. Tricks of the Trade, also gives 100 Alphabets and De- signs. Book bound in flexible imt. leather- gold edges and four hall bearing Show Card Pens. Sent postpaid $3.00.:C.0.D.) 10c ex. Ogilvie Pub. Co..57 Rose St. Dept 2D. #1. City EARN MONEY /MMEDIATELY~~ WE FURNISH EQUIPMENT TO START i es a Al 5 One Phe

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—- OST of the world works for a living—works hard, too. But that doesn’t mean you have Why not play fora living? Dosomething and make it pay you big money and ; 0 Plenty of men oO id a hard time to get along six months ag now £50 to $100 a week playing their Hawaiian Guitars how to read a single note of n when el dn't know America’s Most Popular Music strumming of the Hawaiian ervwhere orchestr soft, melodious st popular ] ericas 1 1uUsI¢

men and women who can piay the Hawaiian Guitar those who have n tered the Hawaiian Guit ire ‘ und more ' Roy Reibane write ! l 0. $200 extra mone in 6 weeks playing my Hawaiian E.s ently wrote me ha rasa 1g Orca. | took your iIrse Granville Smith write I — ting ind p ni i! 3 : for mer D su } vey Tr But let me tell you hout my si at 50 we ar seit pha a Misi gps “f dy, clean H G } en 20 and ‘ { . ood prac 1 m j es. Write 7) » child a i rsona! in fully t 2 Federal — ay ge.) One the Dozens of Photo helps sent with Pictures Instead of ae : each Course . Words, Teach You “Ing! that | , Shane anaes mu like I don't care if ir | ré vy what a Hawaiian Guitar lool notors, if 4 et d re ele 1 es to understand that lw ele j re elo« ter the er first lessor s l lesigr t He d Pn € I se é I grap! wW ifessior » e strings My Kno-A tieall intere q eall I { . i} ¢ ¢ r studetr eC e fir ¢ Cc longer, but ( il peed ‘Lonesome? It’s 100! oder world lies waiting at i here, meet the best people your feet \

—- — rt, and gain a host of friends All rs, waiting for you, if su y w or ire willing to spend a few minutes mma! d ad with me ra few short weer your y

pWe Send You Reg- jular Phonograph Records of Every Piece in the Course

t miss a ethat ( ( end you a eT yt € ‘ rec ed t h to i € Phese take mur ch ese rec I to guide ter yur pl ing t These records e wit the course € le 1 1 your

WwrrwwyPrrTyT AT arremmataryretn A POPULAR MECHANICS ADVERTISING SECTION first ni thre I ree sighs a Sure Cure! e mastered the Hawaiian Guitar, the 1 can tr el live in real style f A Send for ~\\ FREE BOOK raItrTreme Tre yA 19

This is what Prtzman Did

We Give You this Cenuime / HAWAHIAN / GUITAR | yey «

b | f P I } I ! ‘ Hi G ‘ H ul ‘ How I } t n f | I I ire Tod W e Now Phen oe en ef ef ee ee Pe Pe @ A. F. Bloch, President, @ Hawaiian Studios, 52128 of m New York Academy of Music a @ 190 Fifth Avenue, New York City. 7 . Without ob t end me FREI = — B Hiow to La Haw n « . i BI ONEY, @ a e id = ~ e << : 7 ldre — . . SES BSR SESE EEE SEE EEE ESS er mews Ar

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20 POPULAR MECHANICS ADVERTISING SECTION gr oy BIG PAY awaits ambitio study men who have }, practical training. Lear; home in spare time under g nee of practical engineers with 5 to 9:

years’ experience teaching n National Cash Register. Delo, Remy, Frigidaire and Deleo-Light. ¢ ae home study courses in Time & “ngineering, Mathematics, M: Drawing, Tool Designing, Blue Print Reading. Easy payments. Special rates to students enrolling now. Write for full details. MICHAEL’S SCHOOL, INC. Yi Dept.11, MiamiSavings Bidg. DAYTON, OHIO

if “Mary, 1 Owe It 99 All to You" = Be aDoctor o iROPODY my salary $50 ar ——F | give you this opportunity,’ he said, ‘fcr world. You deserve it.

_ -_ : ' — SaSaaae — ow it, but I've been w atch ng your w Digni fed pos fessional aaa 1 for doctors every- | itional Correspondence Schools wrote e | where Make $5000 to $15, 000" a year ourse only Y d for a course of home study. Kee t 2 years at bést known College of Chir ee. in Amer ng man, and you'll go far. I wish we had more men like ica equips you for practice 15th year. You ar , ready to enter with 4 years high school or equivalent Largest foot clinic in world “And to Prom Mary, I owe it all to you! I might still be —large faculty physicians, surgeons, chi- eS ng in the s f d b at the same o'd salary ropodists—study in Chicago—you can 7% d me to send in that 1. C. S st "9 earn while you learn. Write for catalog if you h it urge me to send in that 1. - ©. Coupon, No obligation. Dept. 911 ae + ° . os ate » 4 . ‘ — * P mat alarwv? How about you? Are you always going to work for 2 smatl sslery! | 000080tS COLLEGE OF CoHREPeeY Ave you going to waste your natural ability all your life? ‘ ) way? Ut all depends on what : 1327 North Clark Street Chicago \ your spare € More than 180,000 men are getting ready for promation right now n the I. ¢ S. way Let us tell you what we are doing f ther ind what we car o for 3 Mail the Coupon for Free Booklet onion iil ss tines iia aeadianabiaaarineieatinciniens ieee tntinattiinites esamcittinn Graduates in Constant Demand at Big Salaries INTERNATIONAL CORRESPONDENCE SCHOOLS Intensive, practical training Low Tuition Rates. |) “<The Universal University” in 1 year. Engineering degree in 2 years. Also special 1 B 5582- F s t Pp courses. Notime wasted. Expert instructors. Personal Ox 2962-F, Seranton, Fenna. tion. Extensive modern equipment. Free employment Without cost or ition, please send me a copy of 3 t for gradu: ee Rs na omy were secured during training

' | let, “Who Wins ane Why. and full particulars about the ¢ f € Write Free ttustrated Catalog. before which I have mi i X in the list below: FINLAY ENGINEERING "COLLEGE. 1001-B Indiana Ave., Kansas City, Mi BUSINESS TRAINING cto — : ——e ~ [) Business Correspondence Lincotn did itt Also thousands of other ers! |aw. | }Show Card an "d Si Lettering yers, politicians and business men. YOU, t an { | Stenography and Typing become a lawyeror law trained business mar a L} English bome study guided by the successful pr g Civil Service | lawyers of our faculty. Write today for free book. Railway Mail Clerk | Mail Carrier Common School Subjects High School Subjects Car oning } Illustrating al, AT ameERICAN CORR. SCHOOL OF Law 3601 Michigan Ave.. Dept. 1359,

Lumber Dealer ing BY OUR PROFIT-SHARING PLAN TECHNICAL AND INDUSTRIAL COURSES | OUR GRADUATES SUCCEED)

} Architect Automobile Work tural tsmen [ } Airplane Engines One of our Iowa students started in a very emall way—nor Plumber and Steam Fitter ing over $30.000 a year Another in Wisconsin, over 3! Plur mb ng "7 Inspe t ! ; first year. Day or night classes. Call or write for FREI i g spec Foreman Plumbe Chicazo School of Watchmaking, Devt. 4701, 549 W. Randolph S!

Heating and Ventilation Sheet-Metal Worke: *35 10°75 WEEKLY

( ) Ry. Mali Clerk 3teno-Typist t r ( Prohibition Inv. t ( )R.P.D. Carrier ( { i ( ) Special Agent ( = 7 (investigator) ’ [ ( ) City Mail Carrier t Growing ( ) Meat Inspector ) Chauff eur-Carrier KR ! ne ( ) P. O. Clerk ) Watchman ¢ LJ Gas I O1 ( ) File Clerk ) Skilled Laborer ( ) General Clerk ) Postmaster « Nan ( ) Matron « ) Typist c OZMENT INSTRUCTION BUREAU, 111. Arcade Bldg... St.Louis, Mo. Send me FREE E part cular How . Sea es eens eT dente Pu 7 ‘ + L ity State NAME if 4 re ¢ ( 1 this coupon to the International

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POPULAR MECHANICS ADVERTISING SECTION 21

YEE Blue Print Plans eh and 24 Page Book a ‘*How to Read Blue Prints” Sent FREE Our gift to every man in the building game. Sent absolutely free. For we want you to see for yourself . at our expense how easily and quickly you learn to read blue prints .. . and can get the knowledge that will make you more money. Don’t send a penny. Just mail the coupon. . The Book Tells How graphs of our men and de partments ... tells what others have done and what you can expect to do Chicago Technical School for Build- ers is one of the oldest and best CquLp ps. d schools of its kind in Amer- “How to Read Blue Prints”’ is writ- ten in plain, every day English. It is easy to understand . . . and will You Can prove to you immediately how quick-

Become a ly you ia get oa ng tes, that = ica. Many big builders owe taei Aw given other men the chance to work first ste i seein » mg ng st steps to success to our training % * | Buildi with their heads ... and to make H i f — Expert th } ; undreds of practical men from the : P ee ay , a es building trades attend our day and Plan Reading. Every We know this is true lor 22 years evening classes it our chool for ig ur school for \ y o has got very lar we have been training men... in builders here in Chicag You t — tage megs 5 their spare time, at home ... to ad- thi ime tramimng ra ry ! ume xpect to be a first vance and succeed in the Durlding practi anteehnen ahueratipne superin- field. Many have now got good con- Dee hee eal he “ee tracting or building businesses of their e on a plan 2 to lay out own, Many are salaried men, fore- Train by Mail

rk from the men or superintendents uns by the This lealle ‘3 really a Free Trial . Go right on with yous W rk. You to read ar Lesson in Plan Reading written pare tin is a ie or as mitt h as s you read by a practical building expert It vou wish is all you need, Our rds costs vou nothing will teach vou pr wctical lessons and vctual blue print Estimating. — <enigg how to read Blue Prints . and hui ding plans come to a mail racting organ money. It will show you how eas) ~ swith conn i Print I ee mage Ae our instruction is . . . how quickly the two be ill information about I ; vou can become an expert ‘ ean us ye é BOC s 1Or I ! xing Ol get the practical knowledge that \ : | . — 5s a must have to get ahead qu k Pells how I . ! perint ‘ | my wtant oe vars ” “ oth rs 4 t ms £ | wows you just | Amother Book FREE eiiit tis prscical builders cour | t plan We will send you also a book about ““Staltnow. It ecctes, hing to f | Superintending. How the Chicago Technical School for what this practic rsi ee rosea Builders. It is free, too. It tells you WHat it can do tor it yo t to make nstruction as it all about our method of training by fact . the Chicano Teel 36) how to get th correspondence. It shows you how Bu n the least time Nigetierige nabs you can make your spare time | wars pee Aleem pay you a handsome profit in a Mail the Coupon — NOW .

Builder's Course. very short while It tells all eee ne ee ee ee ee ee oe about our practical instructors CHICAGO TECHNICAL 1 . practical men ‘ shows every branch aun 4 SCHOOL FOR BUILDERS "Ey" gant om telanaee. department of our Builder's § pepe. n. 141, Chicago Tech. Bidg., bea Courses . . . gives you photo- J 118 East 26th St., Chicago, E11. Please send t your Free Book nd Blue Print | for men in the Building Trades send postpa CHICAGO TECHNICAL gyros below. 1 SCHOOL FOR BUILDERS |: CHICAGO TECH. BUILDING ; Dept. R-141 118 E. 26th St., CHICAGO, ILL. i

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22 POPULAR MECHANICS ADVERTISING SECTION Course in Two Years! You Want to Earn Big Money! And you will not be satisfied unless you earn steady pro- motion, But are you prepared for the job ahead of you? Do you measure up tothe standard that insures success? Fora more responsible position a fairly good education is necessary. To write a sensible business letter, to prepare estimates, to figure cost and to compute interest, you must have acertain amount of preparation. All this you must be able to do before you will earn promotion, Many business houses hire no men whose general know- ledge is not equal to a high school course. Why? Because big business refuses to burden itself with men who are barred from promotion bythe lack of elementary education. Can You Qualify for a Better Position We have a plan whereby you can. Wecan give you acom- plete but simplified high school course intwo years, giving you all the essentials that form the foundation of practical business. It will prepare you to hold your own where competition is keen and exacting. Do not doubt your abili- ty, but make up your mind to it and you will soon have the requirements that will bring you success and big money. YOU CAN DOIT. Let us show you how to get on the road to success. It will not cost you a single working hour. Write today. It costs you nothing but a stamp. American School Dept. H-974, Drexel Ave. and 58th St., Chicago American School Dept. H-971 Drexel Ave. and 58th St., Chicago Send me full information on the subject checked and how you will help me win success ...-Architect ...-Building Contractor ....Automubile Engineer ..-Automobile Repairman .-Civil Engineer ..Business Law .... Lawyer Machine Shop Practice ....Mechanical Engineer . E .... Shop Superintendent ... Structural Engineer ....-Employment Manager ...-Business Manager ...-5team Engineer ..Cert. Public Accountant .Foremanship ...Accountant and Auditor ....Sanitary Engineer .. Bookkeeper ‘ ..Surveyor (& Mapping) .Draftsman and Designer ....Telephone Engineer ....Electrical Engineer ....Electric Light & Power ...General Education .. Vocational Guidance .... Lelegraph Engineer ..-. High School Graduate .... Wireless Radio .... Undecided INVESTIGATE THIS VOCATIONAL TRADE OPEN To aii WHETHER 18 OR 50 The opportunity of a lifetime financially independent Earn ul a year Great demand and alwa because it is a human necessit learned in three to six months by a r tools of the trade No previous t your own if desired Oldest estal I r y to train an additional number of 1 work Remarkably low cost—-starting fees as low as $1 R Fare to nearest school included. Earn while you lear sary reguiar arrangement for part time positions I ' this opportunity The facts are convincing Write toda Bulletin No. 2 which gives complete information. BODEE INSTITUTE New York Philadelphia Brooklyr 1755 Rroadway 1205 North Broad Street 85 « PREPARE FOR AN ART ete thru the only art school operated as a department of a large art or- ganization, who have actually pro- duced over a quarter million draw- ings for leading advertisers. Where else can you get so wide an experi- ence? Home study instruction. Write for illustrated book telling of our successful students. MEYER BOTH COMPANY Michigan Ave. at 20th St. Dept.16,Chicago, Ill. You can learn by our modern and origir of instruction every part of the Watch Repairing Trade at home as good or better thar You can earn money while learning a well paying position or start in busines pleting our course of instruction. repairers are always in demand an $50 to $75 per week. For particulars ay Wisconsin School of Watch Repairing 166 Mason St., MILWAUKEE, WIS. TRADE SCHOOL Learn Auto Mechanic Auto £ Battery, Machine Shop, Electrica Mechanic, Aviation Mechanics, Tiling laying, Plastering, Plumbing, Electr lene and Airplane Welding, Drawing mating, Show Card, Sign Painting, W Dressing, Fine and Commercial Art Write for Catalog 50 BROOKLYN ENGINEERING INSTI (Operated by Bedford Br. Y. M. C 1125 Bedford Ave., Brooklyn. New York Wonderful, new device, guides your hand; correct your © in few days Big improvement in three hours. No failures. ¢ plete outline FREE. Perfect Penmanship Inst. D-34, St. Loui E Cc r YT 4 d Make money taking pictures. Prepare quickly during spare time F eurn while you learn. No experience necessary. New easy method th nN t else tike it. Send at once for free book, OPPORTUNITIES IN M« Rn PHOTOGRAPHY and full perticulars AMERICAN SCHOOL OF PHOTOGRAPHY 3 Dept. 1359 601 Michigan Ave. Chicago, | A oe eee |

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RE OAL i rairing a tring JL POPULAR MECHANICS ADVERTISING SECTION 23 AUDELS ENGINEERS: MECHANICS GUIDES ge a—, For Every FREE! Engineer Machinist Fireman; Oiler Mechanic Electrician Engineer Student HIS Master Set is a’gold mine of daily, practical helps for workers in every branch of engineering. A self-educat- ing study course for the student; the standard reference work for the chet Thousands of rules, tables, calculations and diagrams make it easv to read and learn. Latest inside information on theory and practice ol modern engineering for reference study and review. Thousands of new short-cuts « that make the job easier. Examine free! Pay $1 a month (less than 4 a day) if satisfied that this set will help you to a better job—or mak your present jol easier AUDELS STANDARD LIBRARY With Questions and Answers That Solve Your Problems Per *a} Mo. A 4 FREE TRIAL Send Coupon Today 8 GUIDES 8754 PAGES— 4750 ILLUSTRATIONS — POCKET SIZE } R i R "item le lS ge mamma ld uuaaauaia Ae tatacapapmemmantaraaae Dei bers with eady eterence t BYkA aes Orie itetiane Eee FREE BOOK—FOR LIMITED TIME. While the editio Aud 1. Hit endorsed Ae xd help in Answer ber petal ed with eact g Eng eer's Licens rice $12; PAu . . n h * Trial ' 5 , . INFORMATION: In a. Mandy Ferm. Makes Engineers exams. ¢ i s to Your Questions and Problems THEO. AUDEL & CO., 65 West 23rd St., New York City Send me AUDEI ENGINEERS AND MECHANICS GUIDES, 8 imbers, $12 and Ace Answer for \ pestial Hal of the subjects covered:— Engine Principles, Valve Setting, Pumps, Corliss Engines, Uniflow Engines, Pump- ing Engines, Contractors Engines, Loco- motives, Marine Engines, Turbine En- gines, Gas Engines, Oil Engines, tn- —~ ‘tors, Producers, Aviation, Steam, uel Economy, Boiler Construction, Fir- ae Oil Burners, Stokers, Boiler Repairs, a Fitting, Heating, Refrigeration, — ators, Dynamos, Motors, Lighting, 'ring, Electrical Diagrams, Radio, Elec- trical Reference and Calculations. Fmployed b

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POPULAR MECHANICS ADVERTiSING SECTION BcarnAVIATION

“I Won’t Be Clerk Any Longer!” ~--so said P. S. Blessing, or through Higher Accountancy increased his salary 250 per cent. For four years Philip S. Blessing worked hard as a clerk and got nowhere. He saw opportunities for promotion and salary increase, but they went to other men because he wasn’t ready for them. He learned what every successful man knows—oppor- tunity without trained ability means nothing. He decided to get that traincd ability! Within fifteen months after he started with LaSalle in Higher Accountancy, Mr. Blessing was made Assistant Treasurer of the Lancaster Brick Com- pany, Lancaster, Pa., and his salary was increased 137 percent. Since then it has increased even more, intil now it is 250 per cent larger than when he enrolled. His employer, Clarence B. Horning, General Manager, acds the vital point: “We be- lieve he has many successful years ahead of him. His business progress has only begun.’ Send for Free Book— “Accountancy, the Profession that Pays’ Is Mr. Blessing’s swift promotion exceptional among LaiSalle-trained men? Not at all, His record is typical of what hundreds of others have accomplished. Harry J. Williams, for example, was clerk with the Lehigh Valley Railroad. Through Higher Accountancy he won the pori- ion of Accounting Engineer, with asalary-increaseof bettcr than 60 percent. JohnH. Lansing—now Public Accountant ond Income Tax Specialist at Amsterdam, N. Y.—was 43 when he took up Higher Accountancy training. It increased Lis income more than 600 per cent. Higher Accountancy training will not interfere with your present work; nor do you need bookkeeping experience in crder to make your start. Our free book, “‘Accountancy, he Profession that Pays,”’ will tell you everything you ant to know about LaSalle training and the opportunities nthe Accounting field. The coupon will bring it without cost or obligation. — <= —Find Yourself Through LaSalle!= = — LaSalle Extension University The World’s Largest Business Training Institution Dept. 1264-HR Chicago I would welcome details of your salary- increasing pian, together with copy of ‘‘Accountancy, the Profession that Pays,’’ also a copy of **Ten Years’ Pro- motion in One,’’ ail without obligation. [ JHigherAccountancy Training for positions as Auditor, Comptroller, Certified Public Account- ant, Cost Accountant, etc. Other LaSalle Opportunities LaSalle opens the way to success in very important field of business. If more interested in one of the fields indicated below, check and mail now. O Busi M t OBanking and Finance ] Modern Salesmanship 0 Modern Business iTraffic Management Correspondence OU Railway Station OTelegraphy Management O Expert Bookkeeping "Law: Degree of LL.B. Oc. P. A. Coaching JCommercial Law O Business English jJIndustrial Management OCommercial Spanish ] Modern Foremanship O Effective Speaking OPersonnel Management ([Stenotypy—Stenograph,y OCredit and Collection Correspondence

Name -... Present I Address am mamenee@em ioe -.naegwaee 2 are WHERE LINDBERGH_STARTED! GET TRAINING THAT ASSURES SUCCESS! ((OME to the Lincoln Airplane School

~ where Lindbergh started Get the sar thorough, complete instruction—now under greatly increased facilities Here you get practical Ground and Flying Training You work on real planes and motors supplied by the Lincoln Aircraft factory You go right up into the sky in our famous Lincoln Page planes. Competent experienced instructors Write at once for fu information! Pmt AIRPLANE SCHOOL to the Lincoln Standard Aircraft Scho “44t7 © Street, Ssneain, Nebraska BE AN ARTIST WE CAN TEACH * ' YOU DRAWING in 7 your own home during your @pare time. Twenty-five years of successful teaching proves our abil- ity. Artists receive large salaries Write Today for Art Year Book SCHODL“APPLED A ART “TRICAL™| Leare ECTR ——-- TRADES

Practical Training on Massive La Equipment. Armature Winding, House Wiring, Electric V Electric Refrigeration, Power Plants, Switchboards, Transfo Motors, Generators, Radio Batteries. Automobile Course in« without extra cost. Write Today for Free Catalog COLEMAN ELECTRICAL SCHOOL, 1628V Main St., Kansas City, Missour

ti}

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Witttad Hh iit | i

' BOOKS SENT FREE! Only fifteen minutes a day with these DER BOOKS will prepare you for Drafting job in less thanayear! Mec and Architectural Drafting fror For Beginners straight lines to important, complex | i step ata time! Built especially for beg Written so you can for men with only grammar schooling understand eVveTy jing room practice plus engineering mac word, by18famous ang clear! Big Field—Big Demand—Big Pay! flexible binding

1750 pages, 1050 ¢ petent Draftemen are urgently neede «! bine prints, charts building and manufacturing lines at $5¢ . That’s just the beginning—for draftemen have th and diagrams. Prepares S cccnedbcaetrd tyes ~ moter Beats meg for a ¢ Drafting ad 7 a heehenre ; “ T eet FREE, and see for yoursel , ‘ al lines. Sent for 15 days’ free ue f { 1 ( r VJ a - i an 7 n - fre all reade oft pedia fp ’ Ve

American Technical Society Dept. 0-919, 58th & Drexel Ave., Chicace EE!

_ american Technica! Society \\ dl ci Dept. D-919, 56th & Drexel Ave., Chicas h— = 8 { s’ free use 4-ve wet of DIA A I I ° | ° rh I f H 2 plates, ex . 2 and 5 ie ents delivery a Iw ke I fer t Iw ® 1 $1 80 aft 15 days en 3 $14.80 (ape | reduced p ® paid Vame

rIrTrem Tre rare CO MTNA

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rical J POPULAR MECHANICS ADVERTISING SECTION Why good ¢& dancersare /(, popular Good dancers are good mixers. They create vorable impression—-have ease of man- a pleasing assurance that wins. No vonder people find them interesting—seek their company! by ARTHUR MURRAY World-Famous Dancing Authority “OOD dancers are always popular J always sure of a good time wher- they go! ddancing is great fun—wonderful ex- it takes your mind off vour worries res. Keeps you happy and healthy— ps } PI on your toes and full of pep. ps self-confidence—gives you poise i you Overcome timidity and awk- s. It enables you to make friends to be well-likked—and often opens ‘ ] rs to important business and social ’s so easy now to be a good dancer, able to the newest, smartest steps! It’s so easy now ome real fun out of life—to be a good be popular, sought-after, admired! Amazing New Method | have developed a remarkable new method of ng dancing by mail which is so simple that you n ani t steps in one evening—right e, in the privacy of your own room, without r partner! kes no difference if you’ve never been on a floor in your life—my new method makes ; g to dance . ust as €a iny of ihe late le P after vy as laking one § my amazingly simple lessons you start right beginning and go through the entire field of ncing. Nothing is omitted—nothing taken nted. You learn to master every step from ple waltz to the newest, smartest steps and Variations Learn at Home Without Music or Partner st feature of my easy lessons is that vou hem in the comfort of your own home when 1 find time. No one to watch and embarrass NO expensive private teacher to pay. You artner and no music— just the lessons. Yet, hefore you realize it, vou will be able to step or with the best dancers of your set—and uch ease an l assurance as if you had been ‘ r years: to ao | Five Lessons FREE I have already taught 400,000 men and women how to dance through this amazingly simple method Thousands of folks evervwhere whe edt tav home and miss all the fun are now having the time of thei lives. They make friends easily—they'’re welcome and popular wherever they go And I’m so positive that you, too, can become a good dancer and get vour full share of fun and pop- ularitv through my new easy method that I’m will ing to send you five lessons from my remarkable course, GOSOiuiel: ree Just send the coupon, with 10c to cover cost of printing and mailing, and these valuable lessons will be forwarded at once \lso a free ¢ of my nev booklet, ** The Short Cut to Popular Don't wait Ol this coupon NOV 7 | $3rd Street, Nev York ¢ ‘ . " 1; 1) ] 1 owe it to yourself to clip and mail Arthur \lurrayv, Studio 851, Arthur Murray, Studio 851, 7 East 43rd Street, New York City. To pr that Tecan! " ¢ nre at IVE FREE LESSONS Pot DMDMNYPITYT AD BMOCWANI eC AnvL DTICIWwe cLyeoeTrTrrmownw =

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26 POPULAR MECHANICS ADVERTISING SECTION Demand for~ Skilled Mechanics! The ent re country is ealling for skilled r rechanics! Good pa) teady work rood opportunities for advance ment! Manter this fascinating trade w it! the a‘d ¢ f the LHw : q 4 ade $200 in 2 weeks ; AMERICAN MACHINISTS LIBRARY MAson earned 8017 tor atew dave’ work. Vos em 6 volumes—2,000 pages—2,500 illustrations roo, Can soon qualify for the wonderful oppor- oO MOVIE : ‘ z . \ | tunitiesin this fascinating, big pay profession maatoe (A combined aa aad course and reference library) | CAMERA FREE OOK : on on eee bor This library of machine haste tice was written for practical GIVEN pertsteach you money-making secrets ind teac! 4 met it ves you the best methods for every kind of machine of photography, in your spare time at home. B | shop wo! It explains machine tools and their operation, tool rinour great New Y« k Studios how mand t ; eg an ei io na fixtur it ; ates | p you get a fine position or start your nd va il nd grindiz jigs and fixtures, automatic screw | isiness—how we give you a professional adhd machines, their tools, punches and dies, ete. Plainly written, | heatre ’ ( é ols, punches and dies, ete nly written, vege completely lustrated—the best kind f help to the machine- | Write today for Book and Job Chart shop man who wants to advance himself N.Y. INSTITUTE OF PHOTOGRAPHY, 10W.33rdSt., NEW YORK, Dep: 49 No money down— | ‘LEARN A TRADE only 7c is areas pera a act ~y nethod ndividua!l tra — s 1 0 o (WEEK FREE BOOK {i | FREE EXAMINA TION COUPON |; | big p your own busines iw a | McGRAW-HILL BOOK CO., Inc., 370 Seventh Ave., New York | trained watchmake 5: Be L : a N 1ACHIN rome “" rt « of ahar ~ ti + = t | Vit ° . iays & $ pair work you do in school Write for Free Book Sut . NATIONAL SCHOOL OF WATCHMAKING 1340 S. Michigan Ave. Dept. 42 CHICAGO. HLL | Learn Watchwork, Jewelry work and Engraving ‘\ A fine trade commat 1 good salary, ees your lwavs in oo nand. Address Horological, |) P, Br =——— —— a a oe ae ae ee eee ee es ee oe an an am am ama as = tit ° PEOR IA, ILLINOIS, for our late t ental x LEARN CARTOONING AT HOME DURING SPARE TIME with the e Sti { HUNDREDS of beginners successfully. The Pict ure Chart Method of teachir OR t1G IN AL wi by mail makes cart ing easy to learn ‘This school is 2 Member of The Nati Home Study Cc il. Write t da iy for san ple he Sane ears TEST YOU R neogper a and exar ples f the rk of successful stude from $30 to $200 id week, se 6c in stan ps Sand ST ATE ‘You R AGE. THE Lanpen SCHOOL.” 2838 National Bidg., Cleveland, Ohio J)’ Stop Making Mistakes | © in English TRIAS Wonderful new way to improve English. No ce. 19 WEEKS rules to learn Noh sind alan Gree rn" ir, spelling, 5 iS CENTS punctuation, and expression, taught in 15 minutes | Your n elghbers kn yw the Pathfir ~_ and yo u will like a day—at h me. Self-correcting feature makes it | it—the ry week news digs from the Natior fas iting as a game. Writs lay f free book pare Center “Br ight “inte “resting , sedone ry Fe different “Howto Speakand Write Masterly Engl Address | farina poe ee hg = *. of pictures, instruction, ent SHERWIN CODY SCHOOL OF ENGLISH | Baa Seas Cal serken 8 Bie iemues ry BL 512 Searle Building Rochester, N.Y. | wit 4“ Pathfinder, De ~ 25. Washington. D. C. “ RAILWAY POSTAL CLERKS MEN—BOYS MAIL CARRIERS—POSTOFFICE CLERKS 18 to 45 PROHIBITION AGENT—INVESTIGATOR $1700 to $3400 a Year for Life Use Coupon Before You Lose It - =— SE ee ee ee ee — a a No “lay-offs” because of str kes, poor business, ete —sure pay— co U P >O N rapid advancement. City and country residents stand same chance. | FRANKLIN INSTITUTE, Dept. K-175, Rochester, N. ¥ Common sense education usually sullcient Rush to me, entirely free of charge, (1) A full descript STEADY WORK ] the position checked below; (2) 32-page book, wit! l positions obtainable and sample coaching; (5) Part ‘ut coupon and mail it before turning the page telling how to get the position checked Railway PostalClerk ($1900 to $2700) | |General Clerk ($1260 to $ Postofhee Clerk ($1700 to $2300) — Prohibition Agent ($1860 to * City Mail Carrier ($1700 to $2100) (Rural Mail Carrier ($2100 to natin pdm ane ee 6 ae 4a Oe in tin ai atta

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POPULAR MECHANICS ADVERTISING SECTION | 9O Days Waites =| =] SD ELECTRICAL JOB f at Big Pay ™ $40 to $200 a Week Right now over 40,000 jobs are crying for trained Electrical Men. They pay from $40 to $200 a week Prepare yourself in 90 days, and get one. Practical electrical tr: aining on real mae hines in my famous I school is the easiest, quickest, shortest way to big pay. L« Electricity—vyou can whether vou're 16 or 60 Pre vious ex perience and uivanced edu tion absolutely not necessary J rk prove it. NOW Course Includes Radio, Television, Automotive Electricity, Batteries! Special extra courses given to students who enroll now. No extra charges. One lowest tuition covers everything. You learn latest developments in Electrical Field. Last-minut« discoveries made clear and practical to you. No Books = No Dry Lectures — Anyone Can Learn Easily !!! McSweeny Students grab off big paying jobs because thev aré trained the practical Shop-Plan way. You learn by doing. You work on actual motors, generators, transformers, batteries, power ¢ | Pree | very ake plants, radio sets, etc., etc. Expert instruct- iT challenge yants to pan this ors show you how—then you do the work man who by ke me ye ey offer! yourself. When you graduate you KNOW money Fromn-th short BOOK electricity, and can tackle any job. oO Sait coupon $95," yourse My 60-Page Book FREE™ now, and 8 Mail coupon now for my expensive 60-page book on Electricity. See scores of phe tog! aphs. Re d how other fellows have succeeded with Me- Sweeny cl uning, FREE TO YOU. Mail coup ‘Ma Rush This Coupes to Me aa x AMAZING R.R. FARE OFFER | allow your railroad fare from ir home town to Cleveland, and )FARE BACK TO YOUR HOME y J. H. McSweeny, Pres.. : : pie : McSweeny Electrical Schools, : N.Y § Dept. 51-T, Stamey oO . ® Dear M ’ ; f 5 . ‘ } . E brook on ELECTRICITY . | dl . 4 nd det } ( H 2 . ' . s Name . s H ELECTRICAL — : 4 I . = 3 DEPT. 51-T, CLEVELAND, OHIO _— . a ee ee ee ee ee ee

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2" POPULAR MECHANICS ADV LETTERING learn at Home Here is the very course you need if you want to get a good paying position as a Show urd Letterer or Sign Letterer, or have a business of your own, This course is complete and_ practical arranged to meet the at home It and especially needs of the student who studies was written by E. otter, i pal of the School of Art of the nation dence Schools, member of the American of Arts, and The National Society of Craftsn Mr. Koller has had twenty years’ teaching experi- ence, ar d his success in he ping other men and women is an indication of what he can do for you. H. L. Wood, a clerk, made more than $700 “on the le before he had con pleted om $ cou and also won $125 in prizes. Harry William Lord “writes that he has more than doubled his salary as a re ult of studying this I. C. S. course _ in spare tin William Whitman, a former wagon build now od a sign painting business of his own and is earning | nearly three times as much as he did before enrolling with the ages ee al Correspondence Schools. There is no doubt that Show Card Lettering and Sign Latesing offer a real opportunity to ambitious men and women. Just mark and mail the coupon | and we'll gladly send you a booklet telling all about the I. C. S. course in Show Card Lett a other ubject in which y ire est re CORRESPONDENCE SCHOOLS Ri. 5583-F, Scranton, Penn Please send me fy hy ' ‘ ' P the position f hia t xX SHOW CARD LETTERING DC ILLUSTRATING 0 CARTOONING ORu ess Management [|Frencl CJ] {Industrial Mana t [js t VW LJ) Traffic M ageme Sal 4 , UJ Accountir nd C. P. A St sraphy and T ( ichi Ka i Mail ¢ nk tA nting I I [_) Bookkeeping [i S U Spanish Cj Con School TECHNICAL AND INDUSTRIAL (COURSES C)Flectrical Engineering \" CJ Ble Light 1A ' fy Mex nical E1 FCor I C] Mecha | Dra Pyar D LL] Machine Shop Pr L}Co I {] Rai 1 Posit S 1 I r {)Gas } ne OF itt LIC Lit LT r Automot Wor LJS ey md May Navi _) Mat! $ | Minir ORad lane I {Js I nee LJ iP Nar Ad City Stat If a resid ( 1 i? ( to the I t lL Corresp ’ Schools ¢ l | ted, M l 1) POPTIT ARP MECHANICS. ANVEDTICIVNG ERTISING SECTION I CAN make a good Penman of you at your home during spare time, no matter where you live or how poorly you now write. My sim- plified system has shown thousands of others the way to good penmanship during the past twenty years — it cam and will do the same for YOU? Beautifully Illustrated Book **How to Become a Good Penman” It contains general infor- FREE!? mation,with testimonials and beautiful specimens of penmanship showing what others have accomplished 4 the Tam blyn System. (hour name ¢ y ™ uy 16 Gite close stamp for my tage) WRITE TODAY, Ad ress F. w. TAMBLYN 418 Ridge Bidg., Kansas City, Mo., U.S.A. EAE APPAARM V1 x YOU CAN DO IT! Famous Violin Maker genuine “Strad”’ Patt Instruction Book, | | Woods.ecte. Sims Wonderful l! C. C. FRASER, Box 14, Sta. C, Grand Rapids, Mich Learn. Furcraft earn by mail, evenings at home, to Renew, Repair 4: *y an -up all kinds of fur garments. Learn glazing, iror and storage. Big demand, big need for your ser NG “—gice in every neighborhood. $3 an hour in your spare time or a real business now and a fur sh e teach you secret processes. Earnings start in U ncrowded fleld for men and women. FREE BOOK i Jeno »w for free bo »« giving details, No obligation 3379 Sunderland Bidg. OMAHA, NEBRASKA @ 2 = : Ee alee Fur Co. easily, permanently pmomens Win hap- pinessand success. Ask for full information @ and special phonograph record. Send dime for p posiage 12972 Woodward Ave., LEWIS INSTITUTE, Detroit LEARN W ATCHMAKING and be yme independent. We help you secure a position. sy to learn. Send for FREE: CATALOG ept. 5. E St.Louis WATCHMAKING SCHOOL, ST. LOUIS, MO Send your name and address for free booklet giving interesting informs and vita! facts about Advertising. Find out how your spare time. for the o opertunitie sopeni: rk. Notext books. we prepare you at 1 this fascinating business. I Id established ach ol cessful graduates ev° Just the plan you have always wanted. Write today. No ot t PAGE-DAVIS SCHOOL OF ADVERTISING ' Dept. |359 32601 Michigan Ave. Chicago, U.S CHRO TION

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POPULAR MECHANICS ADVERTISING SECTION 2 ant play... 7 urn on the radio °e ios but my revenge was sweet bc, - | TOW that everyone is he tune A Dramatic Moment School came to my rescue. Believe me j good stat ind get some That settled it There was no maybe more heavy looking-on for me | = ppy dance music about it. Il played through the first bars of Half a Million People iurray was full of pep as she ad- Strauss’ immortal Blue Danube Waltz A Can’t Be Wrong! lials of her radio Shucks.” tense silence fell on the guests as I continued You - amen aeee toned ant ’ Suddenly I switched from classical music to : Pt we P pen 7 ~~ ipa . / he discovered someone mak- the syneopated tunes from Good New aon pl ed musician . . » h | ‘ Let's try another station Everyone started to dance They forgot all : If — a I t R ¥ Ss oe ere wasn’t a note of dance music about the radio. But soon, of course, the an unis nese — "if me shin . — , Something like this would ‘sisted that I tell them all about my new i i iceman tememranemnmiaain "i ° nieht of a r os accomplishment. Where I had learned Se Eee ee & party Sie when I had learned how? » er .— i , Never mind there ll be a t read the list « ! ( estra on at 10:30 The Secret decide waieh ‘ all P Have you ever heard of the U. 8. s« ] eU. 8. Set wil do the re see disappointme written of Music?” I asked nd no tter w t guests faces Suddenly I 4 few of n friends nodded That F ment 1 e, the ¢ t ea ri ‘ my courage und took Onive correspondence school, isn't it the ex- average the ist a few cent ‘ jour ; cla a eo ae Teme eee Send for Our Free Book ! I asked prisingly easy met od through whieh y« and Demonstration Lesson i aS I only ean learn to play any instrument without Our w erf istrated Free | . igt teacher our Free de nstration ke n explair ide. t Olive it doesn't seem possible,”” someone said t re rh e€ methot ey pr KA rhat’s what | thought t how al , t ' ved before too. But the Free Der t , c ( tration lesson whict \ et PICK YOUR COURSE | mailed! me on Read the list ents to the I r nt, Olive, >3 . . opened my eve that I sent , a el nlav tonight | Piano Violin cop the eomniete eoure ; 1 cw e rest Act NOV ; . Organ Clarinet we ; a ( toe at ‘ ' Ukulete Flute ful it my oe oe fond g free i De trat tell she didn’t Cornet Saxophone u no laboriou ry a a i. come ¢ “geen J And what lrombone Harp No heartiess exercise : - 1 ; ns st rowd let out Piccolo Mandolin ore SB pet Rr Ble ew ¥ ( Ph a - disappeare¢ iG ¢ n Guitar Cello —alae ha the write t plas led a on . ehe ai meal nin ania eiaaien damn ease ieee ania iinet aitas aan y CALIEC ight Singing —— od-natured- Piano Accordion wong + lee U. S. School of Music . e rear Let's Voiceand Speech Culture rher I told - aoe , 712 Brunswick Bids., New York ¢ ety the rad and Drums and Traps had lw I e sem . ce I . . , : Automatic Finger down at the i ’ : ihe r speeche C e old Dr. } ‘ ne, De er P vontrol - M ; : ced one « Banio (Plectrum, 5- perhaps a be . Le ‘ I know that String or Tenor 4. ~4 from b : U one note from Also for Advanced Pian- when I heard others playir ' It il lot of ists a special course, in- 1 envied them so that it I cluding 24famousclassics most spoiled the pleasure of ‘ But m) ° . a distinctive addi the music for me ere i ng to pla tion to any pianist's Music was alwa} one a chance.” said repertoire. of those never-come-true A‘ he can play.” dream until the tf ( POPULAR MECHANICS ADVERTISING SECTION 3

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30 POPULAR MECHANICS ADVERTISING SECTION

Nana ' SPENDINGMONEY = send ss —— te 6 Soe of spe —_ bah. S5or Sloore Sl5iever we your ow ating Tools—Apparatus and Radio Course— Given Without Extra Charge

wy sy Mail Coupon Now ! WORKING OUTEITS ‘ NO EXTRA CHARGE Use this FREE BOOK COUPON L. L. COOKE, Chief Instruction Engineer , L. L. COOKE School of Electricity, Dept. O19, 2150 Lawrence Ave., Chicago, Il. nd me vour big Electr | Book, Sample Lessua and par rbout 1 I t ( e and extra R I t t i Ad

: aff)

TECHN ICAL yonrer \COLLEGE Intensely practical ae training e yese D Diploma; 3 ° year B.S leg spec Architecture and 4 months’ short ‘ aa

Electricity } »ccd,, No time wasted tunities for self-support tuition—easy terms. Write today for your copy of Tie zens ‘ Chicago Technical College x pert instructors. G radvente 3 Drafting while studying Day and SO 4 co gel “Blue Book,” maile Courses ad apte ~ t< oy xur Ex- in constant demand. Oppor evening classes. Athletics. Enter any time. Low Dept.R ap —o yd ae

t Ws 1 Pox aA

FRANKLIN PUB CO. , 800 N. Ciark St. Dept. 9419 CHICAGO NT

1) BI FREE B00 Earn up to $5,000 a year i Youg Y EARN WHILE LEARNING 3 moder Big demand \ : j learn by doing " 5 r go etd. & individual instruction. Write NOW for Catalog P. allowed—no extra charge. NEW YORK SCHOOL OF MECHANIC at a NTISTR' 47 W. 33rd Street YOR’ FREE ! i ited i a | pu e! 1 Railroad fare

352-Page Catalog of one BARGAINS * 36 » O00 Ar ain pr Us 4A hools t r Sp ial discount

THE BOOK ‘SUPPLY COMPANY, Dept. 13 | 564-566 West Monroe Street, CHICAGO, ILLINOIS We quickly teach /* you by mail, or at school, nd. Big future. Interesting ork. Oldest and foremost school. John Vassos, N. Y. , gets $25 for single show ecard. Crawford, B. ‘ . Writes: *‘Earned $200 for complete information, samples and guarantee a Df ald SCHOOL OF LETTERING MUSIC LESSONS site HOME : You cam mad Mua Like This quishiy card w br ng a cata earn Ags Snow cA int in spare time. Enormous de- ma \ $50 TO $200 WEEKLY while taking course.’ Don’t delay. Send today O Stimson Ave, Est. 1399 DETROIT, MICH. Write today for our FREE booklet. If tells a t

ino, Organ, Violin. Mandolin, Guitar, Banjo, ete Bee nt rdvance od players Your only expens ibout te wx r da for and postage used American School of Music. 51 Mant B ig

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POPULAR MECHANICS ADVERTISING SECTION 31

Many N.A.S. Graduates earn up to $5000 5x: ser Thousands easily earning $40 or more Jc. you complete your course of training at National Automotive School you ndle a job paying $40 per week or more. Our records prove that during st year after completing N. A. 8S. training most students earn $40 or more eek. Pay increases according to ability of student. Many N. A. 8. tes earning as high as $5,000 per year. YOU can increase your present learning autos in this magnificent Los Angeles institution. A few months’ Training increases your Wages for Life! ves Angeles ic the (Special Training] YOU EARN Autos right! Practical Instruction WHILE repens

: a by master mechanics If you feel that you are ble to wNA the time to come to Cali- finance your expenses wl . ‘taking : here you can learn the It has alws ays been the N. A. & the con bw thy course our Emplo — de under ideal circum- policy to offer the most complete ment Department can make ar N 8S. occupies one equipment for the training of rangements whereby vou EARN st magnificent build- students Every year shou- while learning We help get ( bifor pia rein hereed sands of dollars worth of ne ob that will pay for 3 ; nstt uction; scores of chasses, motors, and machiner board so that it i ore nts involving an in are installed to replace equip- yu to wor al n ¢ ense of several hundred ment that might be considered Right now we have . a t 1 dollars Situated out of date N. A. 8. instruc- ing than applicants and this condit . hoe eviat ¢ be cy tors are high priced men with some time Hundreds of student —- wear § years of experience in giving taker dvantage of t nae Dix , to ¢ . ROO d lized training. One pn ‘ar learning Request more inf ition about the jobs vila ‘ ‘ y ed life

and repair of every type of motor We Qualify You to Minster ANY nets Job— basses, transtninsione, difterentials big or little ' Jobs plentiful for i taet ul tenlning teqeieed ty She eet i It has never been the Bs. f National Automotive to “rust 7 N. A. S. Trained Men Se. "Weslaing tine intakes Eeeres, student through training. The high standing of the sel

} in’ . wahths at ~aaneuent . e shop work vill not pe by it this Every student can enr f long as we lave a a 1g ca nerience t find short cuts desire without extra cost (jraduates are g en diplomas that ,. S. graduates. This t - t arge f “ are their lalifications and help land big-pa bs ar where will pr The y exist th necessary knowiedge re You kle che most complicated ito re als } thout fe an to come » biggest of ‘'f ‘ in appr ! el 40 imr ove nd ito companies are ‘Biggest School ‘On diat« ai ng dow gr -" iat Mt ar a< - earn fre ent i cre fom in } t bt in Ne A. 8 Entire West Coast according to your ability and ambit No age limit. Enroil at any time alified rding t National Autor ve § I covers We elp er ate rs fillec t complete equift We have jed ment is conceded to be the larges

24 Years of Auto Training Service

Jimmie Dunn gets @ peat 24 yea: nes in ¢ 1 avin ‘ egarding big Pay increase ent; constar paar pe ¢ on cuseption. He ke © profits t SEND NO MONEY Parents Attention 13 wner of one of the biggest ® guarante I , =| Ford. agencies. Nadia nee ee for De Luxe Auto Book Lowe mys ape OGer Ate, : i . ente For the next 90 , 4 f A a be d \ ’ 4 " . ford y Ww t will t t j

NATIONAL AUTOMOTIVE SCHOOL Pa | Dept. 717, 4004 So. Figueroa, LOS ANGELES, CAL. FREE Catalog— Mail Coupon 4 ,@ @ eee ee ee eee . i

J. A. ROSENKRANZ. President National Automotive School Dept. 717 4004 S. Figueroa, Los Angeles Cal

ih free

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POPTIT ARP MERCTIANTCR ANWEDTTCIWNC cre Trrmar

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You can play the HAWAIIAN GUITAR Just like the Hawaiians/ Play all the latest hits just as the Hawaiians do. Be the most popular member of your set, a happy crowd always around you, everybody enjoying and admiring your playing. Get in on all the good times. Entertain your friends—or play professionally. We will help you. Aa Native Hawaiian a7 a expert directs you You get expert instruc- tion, directed by a world- famous player and teach- er, Prof. Walter Kolomo- ku. He quickly reveals to you the secrets of this fascinating instrument. J Complete wa ~ Conservatory Course You get 52 complete printed lesson Nothing is omitted. Pictures explain every move. And no matter how little you know about music when you begin, no matter if you have never touched amu ical instrument, you can positively learn to play by « plain, ea picture method You are sure to learn! What we ¢ n do for others we can do for you 51,000 suc ful students. This record assures your success. Learn at home in spare time Study in spare time n absolute pr hen you like— as long as you like. | nif you don't know one note from another, our t 1 »simple you begin a pie ur first lesson. In half an hour yu can pl it Only 4 motions to learn Then you can pl mu pop rson classical, old- gg agg ‘2 ag Bassey n airs r real , eparately or wi ympar t ki. ul a never | 308 me after you k on to of y ont > 1 Hawatiar ur ‘ion you IVEN . enroll— $18 to $20 Hawaiian Guitar With Genuine Seal Grain Fabrikoid Cover and Complete Playing Outfit Reliable retailers ask $18 to $20 for a sin ilar eatetemmaet ind outfit without the fine Fabrikoid Case, u h alone is ued at $3 Yet you eive t Arenas cist nlendidly built Hawaiis an Gc sitar, « ase : and entire playing outfit, in- cluding pick I pl z ir, tuning pipe, etc., without one penny of expen 8 you enroll Pay : as s you pad We make it easy for you tart any tin itha small first payment then pay whilelearning. It comes to onl 1 few cents per lesson. And bear inn Your only investment is the costof the course we furnish everything else. Our new illustrated book, “ The FRE Romance and En hanime nt of Hawatt Its Music and Its People.’ A book vou will want to keep. You won't lavit down until you have read it from cover to cover. Send for your copy today OTHER Tenor Banjo, Violin, Tiple, Tenor COURSES! Guitar, Ukulele, Banjo Ukulele— well-known instructors. FIRST —— CONSERUATORY, f MUSIC, Inc. 9th F _. * oolworth Bidg, Dept. 548, New York, N.Y. Approved as a Correspondence {f School Under the Laws of the State of New York. Member of National Home Study Council. Send This Coupon for Liberal Offer! FIRST nas CONSERVATORY OF MUSIC, Inc. h Fl., Woolworth Bidg., Dept. 548, New York, N. Y. Please send fall information about your 52-lesson Hawaiian Guitar Course. | @m not obligated to enroll ualess | want to Name Address Wily ) POPULAR MECHANICS ADVERTISING SECTION JIMMY DeFOREST cotns? Teaches by mail the Same System he taught Champion JACK DEMPSEY In 20 weeks, under the System of Jimmy DeForest, t TRAINER AND MAKER OF ( HAMPIONS, you will master the priceless Knowledge that made Jack Dempsey his millions, and fortunes for a host of other Jimmy DeForest-trained ring stars Boys who were once rank amateurs are today earning big money; weaklings have been made strong, cour- ageous; men have learned the art of self-defense Send tod the now Jamous book, “THE GOLDEN AGE OF RON] greatest b f ite kind ever written; full of valuable information, photos « ficghte ore ar i Pa pile who became successes over night. Enclose 10c to cover cos ing, WRITE NOW. JIMMY DeFOREST BOXING COURSE 317 Madison Avenue, Box 137, New York City DEVELOP POWER AT HOME to initiate, persevere, achieve; carry on through life your education; earn credit toward a Bachelor degree, by using the 450 courses The Aniversity of Chicago Gives by Correspondence Inquire, or check the advertisement to show desire and mail to 927 Ellis Hall, University of Chicago, Chicago, Ulinois. Become a la ally tra men win high pee - d cesa in a and publ li independer Greater opp rt — om aver ied re. Big rt ns are gheaded by men with k oa ing $5, 600 to 3*4 000 Annually We guide you step by can tra during spare t L.B. ce LaSalle etude nts found attorneys of state. We furnish all te luding fourte Law Library. Low cost, ex Get our valuable 64-page sw asy te Guide’’ and ‘*‘Evidence’’ books FREE. Send for them NOW LaSalle Extension University, Dept. 1264-L Chicago The World's Largest Business Training Institution “STAMMERING ]fs G@use and gre _ You cnn he quiehiy Curt \ mmer. > d 10 cent p ale epson Seok om Steens er Stutte ring It tells how Leured myself afte Stammer Stuttering for ears. BENJAMIN N. BOGUE e 11112 Bogue Building. 1147 N. til. St. Indianapolis ® ~ MEN TO LEARN MOTION PICTURE PROJECTION | A BIG-MONEY PROFESSION —$2,000 TO $4,000 | We Assist Students to Earn While Learning MOVIE OPERATORS SCHOOL | 61 Sproat Street Detroit, Michigan Amazing new method teaches men or women to earn after first lesson OIL PAINT photoes — portraits, landecapes subjecta, Dg) any $50 and more a week. OIL PAINT OU! I FIT GIVEN nd now for free illuetrated | PICTOI ART STUDIOS 1: e. Dept. MP. 2926 rdwavy. Cl Musical Comedie Revues Unique } strel First - Part complete show with special -ongs, opening choruses, ete. Full of plays, stage songs, Crossfire, monologues, afte rpieces, vaud acts and make-up. CATALOGUE FREI T. T.S. DENISON & CO.,623 So.Wabash, Dept. 19,Chicago BASHFUL Shame on you!"" Are you nervous, embarrassed in com pany of the other sex? Stop being shy of strangers « the terrible fear of your superiors. Be cheertul and con fident rv by =" future! Your faults easily overcome you can enjoy 'ife to the fullest. Send 25Sc for for this amazing book RICHARD BLACKSTONE, 68-4712, FLATIRON BLDG., NEW YORK 34 POPULAR MECHANICS ADVERTISING SECTION = >» | eae a

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go jan | POPULAR MECHANICS ADVERTISING SECTION 33 leral School, one of the oldest and largest art schools in has trained hundreds of successful illustrators. It was founded by the Bureau of Engraving to supply artists 1 needs. Since then the Federal School graduates have « BaRtT s W.J.WILWEROING POPULAR MECHANICS ADVERTISING SECTION 35 become so distinguished for their high quality work that they are in great demand by publishers and art organizations. The rea- eon for this was plainly because of the thorough training given by the school, instruction which was not duplicated by any other institution in the country. Why the Federal **Master Course’”’ Excels A strictly up to date and prac- tical art course and comprehen- sive training in many different eubjects such as illustrating, se- rious and comic cartooning, let tering, poster designing, window card illustrating, ete No one artist is competent to give in- struction in all these branches For this reason the Federal School has ertablished its ‘*‘Ma ter Course” in which every sub- ject is covered by a specialist, an artist who has made a success in that one particular field No other school can offer a course of instruction which is nearly cor parable. No other institution in the country has such an array of artists as are on the Federal staf The Federal Authors The Federal Authors include such nationally known artists as Sid Smith, Neysa MeMein, Fon- taine Fox, Charles Livingston Bull, Clare Briggs, Norman Rockwell, Fay hing, Frank King, Charlies Russell, Herbert Johnson, Walter _Wilwerding Charles Bartholomew and over fifty others. Exclusive original lessons and drawings especially prepared by these famous artists are it:cluded in the Federal Home Study Course. They teach you everything you need to know about illustrating so that when you finish the course you will not find anything new to you You will be prepared for any problem or emergency which may arise. $500~ IN ONE MONTH DRAWING Careful, conscientious training by mem- bers of our faculty made this possible. Today, trained illustrators who draw pic- tures for magazines, newspapers, etc., both men and women, earn $200.00 to $500.00 a month or more. The present splendid op- portunities in this field have never been excelled. Thousands of publishers buy mil- lions of dollars’ worth of illustrations, like the one shown here, every year. Llustrating is the highest type of art. If you like to draw, let your talent make your fortune. Develop it. It takes practice, but so does anything worth while. Learning to illus- trate is fascinating to anyone who likes to draw. The Federal Course Is a Proven Result-Getter Federal School Graduates are employed by publishers and com- mercial organizations all over the country rhe usual salary for the beginner is from $35.00 to $50.00 a week and, with increasing expe rience, promotion is rapid No previous experience is necessary in order to take this course. Every step is plain and yu will be led gradually from simple sketches to complex ilustrati s having a high market value At all times contact with you is direct and personal and every effort is made to develop your own individual style. What this style is can only be determined after thorough training in the fundamentals of draftsmanship : ° Study at Home in Your Spare Time In studying with the Federal School you can take as long like to finisn each piece of work rhe fact that you are bu the daytime = no difference The course may be cor your own hon night or during any spare time you while you work if you wish Many students find a n s long before they finish the course drawi f the course several times over before they fi graduate your connect with the school a personal interest it connections enable us are hundreds of letters fr has done for them. Send for Free Book Our free illustrated book, ““A Road to Bigger TI : iin some of these It also shows the work they have done and gives all the details of the course If you like to draw, do not give it upf 1 fine opportunities mm students telling what the something you do not like so well You owe it to yourself to develop the abilit you possess. Fill in the attached coupon, mail it today and start up the “Road to Bigger Things ee ee ae ee ee ee ee FEDERAL SCHOOL OF ILLUSTRATING 12138 Federal School Buiiding, Minneapolis, Minn. Name \ Occupation Address Town

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34 POPULAR MECHANICS ADVERTISING SECTION Follow this Man! Secret Service Operator 38 Is on the Job Follow him through all the excitement of his chase of the counterfeit gang. See how a crafty operator works. Telltale finger prints on the lamp stand in the murdered girl’s room! The operator’s cigarette case is handled by the unsuspecting gangster, and a great mystery is solved. Better than fiction. It’s true, every word of it. No obligation. Just send the coupon. FE R The Confidential Reports No. 38 Made to His Chief And the best part of it all is this. It may open your eyes to the great future for YOU as a highly paid Finger Print Expert. More men are needed right now. This school has taken men just like you and trained them for high official positions. This is the kind of work you would like. Days full of excitement. Big salaries. Rewards. /neconsernnnrennsnsneeenneenneeenneoanseeneesaoneeetseess aon @OEOO to $10000 a Year UNIVERSITY OF APPLIED SCIENCE 1920 Sunnyside Ave., Dept. 13-59 Chicago, Illinois You study at home in spare time Gentlemen:—Without any obligation whatever, send me No advance education is needed. Any man who can your new, fully illustrated Free book on Finger Prints, read and write, and think can make good. A won derful book tells all about what others have done Shows pictures of real crimes and the men wl solved them. We'll send you a FREE copy with the also FREE copy of operator No. 38’s confidential report. Tell me about your low prices and easy terms. ES Se SP, Ee free reports. Get our low prices and easy terms. $6065 66bs 40s ecnedeeriavsne : Mail the coupon. SD sisi iecbchdababnbanadievchnnnimiisinctewnnesenneiid : UNIVERSITY OF APPLIED SCIENCE 1920 Sunnyside Ave., Dept. 13-59 Chicago, Illinois DMDITT AD MEfYWTANTSOC ANVLETDTICIWwe creTnrroaw

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vo [Wwe POPULAR MECHANICS ADVERTISING SECTION isa new, amazingly simple and practical way of learning to do eleatri- 1rk—so sure of results that we agree rive you training and employment e that will help get you a better job nore money or you don’t pay a cent! Think of it! You take no chance. You are ed of thorough preparation for the ny Opportunities in this great indus- try which is constantly calling for more ned men. We not only train you, we help you get a job. How can we do it? By a wonde orful new method of teach- Teach You Electricity | \ for a Bigger Paying Job \ tion by practical engineer- ng with W.N. Little- wood, formerly in- structorin University of Wisconsin, chief instructor. An Engineer Says: Here’s what a practical electrical engineer says: I am amazed at how simply you explain the facts about elec- tricity. The points are so much easier ta grasp than f by the usual methods, that the student must make quicker, surer prog- ing which makes everything about electricity easy to understand. Learn at Home, Quickly We furnish you with the projector, so ple anyone can operate it, and thou- oy, employment service helps you locate a big ls of feet of film. You see all types of pay job in the branch of electricity interesting electrical machinery in operation, you most: Radio, Switchboard Work, Power ress.” Charles E. Fitz, M.E.,E.E., formerly associated with Steinmetz. Employers Want Film-Way Trained Men = nite wi dieorameawhi bias a Plan 1t Operatio n, Wiring,etc. Here isan extract a Sieg ance which eng the from a letter written by an cmpioyer: facts about electricity as plain, easy ‘We will gladly co-operate with you, not P* 2 to grasp and enjoyable as looking only in employing any of your students at amoviein your favorite theatre. when vacancies occur in our organizations, . : : s but also by recommending that our em- _ You are personally guided in this _ ployees take your course. live, fascinating instruc- Electric Material Co., South Bend, Ind. FRE Three Lessons and New Book,"The Film Way to Bigger Pay in Electricity” Mail the coupon for three actual lessons showing how we use real motion pictures to make the facts about electricity easy to grasp. Our new book describes the wonderful oppor- tunities for a berter job in electricity and gives the com- plete details of this fascinating way to learn. Start now to move into the bigger pay class. Sending coupon is the first step. Do it now, ger the things you want in life. You Use This Real - - ad - oo Drafting Set DeVry Projector Given - ; Course includes yne can operate this standard school instruction in DeVry projector (value $75) which shed every student for use during rse at no extra cost. Uses ordinary light connection, farm lighting equip- ment or at bile battery. Gives clear, brilliant and flickerless motion pictures right in ~ your own home. drafting and compiete set of professional instru- ments shown, drawing- board,T-square, pa- per, rules, scales. > Re "22s a ee TAKE THE FILM WAY TO Bigger Pay A

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36 POPULAR MECHANICS ADVERTISING SECTION Send Coupon Below for FREE Radio Idea Book: IMPROVE) VOLUM 26 Otb D - =, STATIC BY | MARVELOUS NEW METHOD] | f as Easy Ways B= to Make’322 an_hour fiero in Your Spare Jime | nRADIO Earned $500 ACH of these Association-de- Spare Time E, veloped plans a big money- Frank J. Deutsch, Penn.: “I maker. Set owners everywhere Bedi ta tay spare ime, Yours want their sets modernized, freed is a great plan for ambitious from static, made to operate electrically, transformed into si — dial controls. Learn to render these services and you Becomes Radio easily make $3.00 an hour spare time, to say nothing of Baitincey tan money you can make installing, servicing, repairing, build Gam Vane radio sets and selling supplies. Our members cleaning Cini Cinna Canela: *2 You can do the same. knew nothing about Radio when I joined the Association a oe - - - “uh tina coont JOin the Radio Association f the engineering staff of the DeForest Company and my in- eS a A membership in the Association will give you the training | : need to render these services,—that will enable you to earn >. Deables .Income to $75 a week spare time—train you to install, repair, build tn 6 Months kinds of sets—start you in business without capital—pre} W. E. Thon, Chicago: “You you for the $3,000 to $10,000 big-pay radio positions—help men | Pas . , secure a better position at bigger pay for you—give you “i the managership of large privilege of buying supplies at wholesale. A membership ee ee need not cost you a cent. RADIO ASSOCIATION OF AMERICA, Jept. P. M.-12, 4511 Ravenswood Ave.. Chicago. Act NOW = "wiser a0" Please send me by return mail full de- ; one gone | “ rt | To limited number, we will give Special Memberships 1 sur Specia embership Plan and a copy yo aa i r Radio Idea Book ‘ | may not—need not—cost you a cent. lo secure one, \ j today. With the details we will send you copy of our R j Idea Book that will open your eyes. Mail the coupon | RADIO ASSOCIATION OF AMERIC \ 1. ae i tng ae: Dy a i tt POLS Dept. P.M.-12 4511 Ravenswood Ave. Chicago, | 38 POPULAR MECHANICS ADVERTISING SECTION

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POPULAR MECHANICS ADVERTISING SECTION 37 Earn’75 to’ l00 a Week Za86C6as AUTO MECHANIC — Learn Easily in 8 Weeks on Real Machinery— 83 tac." Eight short weeks of pleasant, fascinating, practical auto work in my big shops—and then a real job paying $75.00 to $100.00 a week! You can step right out of low pay, long hours, and no future into the job of jor a high-salaried auto mechanic. Everywhere jobs are waiting for men trained as I train them. Change the whole course of your life in 8 weeks! Not a Correspondence Course Money Back Come to my shops. I will make you a me- Guarantee chanic able to handle the hardest auto jobs i cala quickly and easily. I'll teach you to know training, you are not autos inside out. You don't need education. J««9°q1 Pay Your ay my qual 1] You don’t need previous experiences All you R. R. Fare’’ rour tuition will be rc-} need is ambition. You learn by doing—by J. F. Butler un working on actual cars with real tools. This President is not a correspondence course. Short Cut to Big Pay ';, —---------- ?, Butler, Pres., Learn how easy it is to get a steady, big- | pay job in the great auto field Learn le L EVEL AND AUTO SCHOOLS, what other fellows like you have done with J1sis E. 24th St., Dept. D-11, Cleveland, O | CLEVELAND Auto Training Please send me FREF $9 1K on Auto M . and deta | Mail Coupon for Book ; ~ CLEVELAND) | AUTO SCHOOLS * . , 1815 E. 24th St., , ! Cleveland, Ohio |... SPORTSMEN Za | Read This Offer! S e COUPON and receive a magnificent Sportsmen’ p Book telling you learn to MOUNT GAME-HEADS, BIRDS and ANIMALS. Youcan ‘i e your own Taxidermist. Our school has over 100,000 graduates throughout the world. You can now learn AT HOME in SPARE TIME. erent Your Own Trophies! ng and Fishing have entered a new era. Alltrue sportsmen now kill pecimens, but Dt )UBLE their interest by mounting their trophies. ‘rets of Taxidermy (mounting birds and animals) are now revealed. YOU ( \W LEARNT AXIDE RMY FOR YOURSELF. Bea Taxidermy artist. Mount bir mals, game-heads, fishes, tan skins and make beautiful rugs and robes. I and quickly le arned in your own home. Adorn your home and den with I 8 fines st ART. If you enjoy hunting—you will enjoy Taxidermy MORE. N.W. School of Taxidermy, 3379 Elwood Bldg.,Omaha,Neb. = 5 Address ~ ) Do you want to MAKE MORE MONEY? Then | ive your SPARE TIME to Taxidermy. Make Big Profits : bo rd $250 a month by mounting for others or your mounted specimens, or go into busi- open a Taxidermy shop of =. -— .. vend earn $3,000 to $6,000 a year. hip This Book FREE %* Every Sportsman should have this marvelous book. You can right. now, while this edition lasts, get a copy Free and prepaid by mailing the coupon NOW. Only OST limited number free—Send Today. Nothing like it. Just off the press. Contains 48 large pages and cover in brilliant colors. More than 100 photos of splendid game N specimens and masterpieces of the National Museum at Washington. Brim full of interest to every sportsman. And think of it, this “TTrrrrreferrrriefeftf ® valuable unique and artistic book can be had h 2 aowsty Sportsmen for the asking. a N. W. School of Taxidermy s e q * 3379 Elwood Bldg., Omaha, Neb. 7 Mail theCoupon Bs end me your free {illustrated book ‘‘Sportsmen and Their s — e ® Trophic Also tell me how I may lea arn this fascinating 8 If you want to preserve your trophies; if # ®t °™* ly a=d quick!y by mail. No obligation s ( \ you desire to make money from your spare s . time, if you are a naturelover—send the 8 5 - coupon and receive your copy by return B Name -___..........------—-------------- . ™ mail. a 5 _ . o ~ POPULAR MECHANICS ADVERTISING SECTION 39

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Millions are waiting to buy ReNUZit For every one of the thousands of new cars on the streets today there are at kk The 20 OLD one nd re are losing the bloom of youth every day Phat is why ReNUZit Agents all over the evuntry « | ReNU zit ® make almost unbelievable profits. ReNUZit is the big sensation they are all talking about and eager System, \ to try And our pre positio yn is so GOOD that you should have no trouble making $50.00 a day and Not a it costs nothing to investigate. You can't afford not to up lisa. Erie —— |$t.. Depe. \ How This Miracle Fluid Works Polish Chicago, Ill. y ist flow ReNUZit onto any automobile with a piece of cheesecloth and instantly the ie oR IGINAL color and lustre of that car are like new again! Restores the sparkling beauty Rush full details of ™* of any automobile or any painted, lacquered or enameled surface in the twinkling of 38 POPULAR MECHANICS ADVERTISING SECTION

takes the minute hand of your watch to travel from “12” to “6”—not more than 30 minute it yourself without risking a cent You'll get a thrill you won't forget! i oy AGENT’S NEW PLAN—MAKE $50.00 A DAY | | Re NUZit. with Free \ an eye No tir ease ne rubbing or polishing I off t's to apply as * B C"’—Dries almost immediately No trouble—No bother— New Pla on how 1 \ No mess. GUARANTEED NOT TO TURN WHITE. (ae eee Sees oe % ReNUZit Service Stations Bring $1,000 a Month Cleaner No oblig gation Addres . eee N well om ute UState ne ee * ; or dean the qucuber of axeq ice st o the big-money clase operating Re NUZit Service » LASTING finieh as ReNUZit The seed ati Th e YOUR « geet into ne big N \ Test ReNUZit t FREE! ° Yor pli whe nm <« TODAY for full details ar ‘ "leas Test Offer \ 5 ( ; \. The ReNUZit System, 154 E. Erie St., Dept. 805-T. R., Chicago, Il. =) 5O MINUTES AN D | f ReNUZir

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POPULAR MECHANICS ADVERTISING SECTION 39 You Pledge Your~ self To Secrecy Baffling secrets of the world’s greatest magi- cians—mysteries never before divulged—super- natural effects of the Orient—massive stage illusions—the most priceless, most treasured Secrets of the Magic Profession now—/for the first time—disclosed to YOU in the great Tar- Earn 5250 to 51000 a Month! There is a tremendous demand for Magic Entertain- ment. Clubs, churches, schools, conventions, theaters are on the lookout for Magicians—pay $25 to $100 for perhaps half an hour’s program. Keep your job. Make EXTRA MONEY on the side. Salesmen—business men ~professional men—all can use Magic to gain popula- rity and peetite, Easy for YOU to make $250 to $1000 a mon Secrets of Magic! At Home—By Mail Dr. Harlan Tarbell Master of Magio who has mysti- fied as well as lay- men with hw us tricks, ‘ bell Course in Magic. Learn co perform like a real magician in a short time—in your spare time at home. Be the life of every party—the center of every crowd, wherever you go. Business and Social Success are YOURS when you know Magic. And it’s EASY with the Tarbell System! Study the first lesson Astonish Your Friends 2) ou: (ends will be amazed at your wonderful Magical powers. You will have that Magnetic power that gives you instant popula- rity in any crowd. Everyone will marvel! at your appa- rently supernatural, psychic power. YOU possess this talent now! Surprisingly easy to bring it out. Send the coupon below aow—tnd out how easily you can do it. Send for Big Mail coupon now for big free ’ Write! Magic Book telling all about the great Tarbell Course in Magic. Find out how you can learn to bea real magician—easily and quickly!—at home!—by mail! Learn what I have done for others—people just like yourself. Get our Prices a Easy Payment Plan. Mail coupon NOW! Tarbell System, Inc., Ste¢ie 1926 Sunnyside Avenue, Chicago, Il. Free Magic Book SE SSS SSS SSS SS 2" -Seeugucesecugrrseen4y City and State —s = Sa SS SSS SSSR SESS SS See eS - ® Tarbell System, Inc., Studio 13-s9 2 . 1926 Sunnyside Avenue, Chicago, Illinois ' ' Please send me your big FREE illustrated and colored booklet giving full ' information on the Tarbell System of Magic. No obligation on my part § s whatever. ’ . r 8 Name ' a COMER se ee ee ge ree ' a r 1 MBBS .cocccsecnsnsnsesnesccccsescescsscsessesceeseesese Age . i a : s - he = DOHODITT AY? MYECUANWICOC ATUL mnerrTe sae re. wT

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40 AVIATION ——7 7 > New Training Equips You For the Position You Want Choose the position you want—pilot, mechanic, de- signer, aircraft business man, field superintendent, air- port manager, aircrait manufaeturer—countless big positions are open for the trained man in every line of iviation. Take the training that will equip you for any one of those positions——get the newest features of aero- nautical training at the College of the Air The “jack of all trades" has no place in aviation— masters are wanted. You need a specialized training Marsha!l Flying School has new courses, new equipment and new methods of instruction to give you the help you need; all courses are offered now. Complete Aviation Course Now Only $245.00 his course which gives you all the principles of flying and every needed requisite to make you a successful flyer, has been reduced within the reach of every young man. This course will be the big step you want to take to start into the aeronautical field—the field of so many opportunities Decide today to commence your new career by enrolling for this course One class of the Marshall fall term students. Straight Flying Course. Price (without ground course), $75.00 Primary Flying Course landings and take-offs Ground Course Intermediate Flying Course ability is shown. Price, Ground Course Complete Aviation Course a successful flyer Advances students to crosswind Including Mechanic's and Engineer's $150.00 Student can be soloed if including Mechanic's and Engineer's $200.00 Everything needed to make you guaranteed No bond required Solo Price including Mechanic's and Engineer's Ground Course $245.00 Private Pilot’s License Course. Price, after solo $150.00 Special 50-Hour Course. Price including ground course . $600.00 Limited Commercial Course. Qualifies you under the Depart- ment of Commerce for the Government Limited Commercial Pilot's License $700.00 Mechanic's and Engineer's Ground Course 300 hours of training Price $75.00 This course is given free with all our flying courses with the exception of the Straight Fly- ing Course. NEW CATALOG FREE! Mail this coupon for the new catalog which shows you the equipment, buildings and the many training planes used at our school—ex- & plains all about the new courses—tells how you Mar- can make your start and win your way Former Sy gulaing MARSHALL FLYING SCHOOL, mis 20d Inc. MARSHALL, MISSOURI 630 North English Street Gentlemen Please send me without obligation Check the in- your new catalog struction you want Pilot Name Mechanic Designer Aircraft Busi- Address ness 49 POPULAR MECHANICS POPULAR MECHANICS ADVERTISING SECTION to more pay If youarea mechanic, woodworker Car- penter,sheet metal worker, millwrig!)|. ct. This Short, Practical Course Will Put More Pay Into Your Envelope : Learn blueprint reading and eleme; ts of drafting. Put yourself in line for promotion. Turn your s hours into profitable investment. Our course js (4c, pleasant and interesting. No complicated problems. nh dreary book reading. Pratical men teach you. N o {| Just matter-of-fact instruction. Endorsed by emp mn k WRITE FOR THIS LOW PRICED OFFER Get our wonderful proposition. Our low price and easy terms make it possible for you to learn in a few weeks what many men have spent years to learn. Full drawinc equipment sent the minute you enroll. ‘et BLUE PRINT READ | 1721 Nicholas Bidg. — mye AVIATION PY REE Send us your name and address for full information regardins the Aviation and Airplane business. Find out about the many ereat opportunities now open and how we prepare you at home, during spare time, to qualify. Our new book Opportunities in the Airplane Industry also sent free if you answer at once. AMERICAN SCHOOL OF AVIATION, Dept. 1359, 3601 Michigan Ave., CHICAGO I POSITIVELY GUARANTEE to increase your arms one-} inch in size, chest one full ir strength 25%, health 100‘ one week's time, by follow my instructions and using 1 exerciser 10 minutes morni: AVIATION ADVERTISING SECTION and at night. Send $1 for eo: plete course and exercisers. Sat faction guaranteed or $1 refunde Prof. J. A. DRYER, Box 1850-P, Chicago, Ii! A PERFECT LOOKING NOSE _ an Easily Be Yours Trados Model No. 25 corrects now ill-shar quickly, painlessly, permanently and comfortably (excepting cases caused by improper bone struct is a safe and guaranteed patent device of precise ment that will actually give you a perfect k Over 90,000 satisfied users. For years recomme physicians. 16 years of experience in manufactur Shapers is at your service. Model 25 Junior for ch Write for testimonials and free booklet h t how to obtain a perfect looking nose M. TRILETY, Dept. 3070 ki Pioneer Noseshaping Speci inghamt HAIR GROWS! when our Vacuum Cap is used a few min- utes daily. Sent on 60 days’ FREE tria! at our expense. No drugs or electricity. Stops falling hair, cures dandruff. A p: brings illustrated booklet. MODERN VACUUM CAP CO. 557 Quincy Denver, Colorado Athletes Heal Rupture In a New Scientific Way Make this FREE Test Ruptured athletes every\ have found a way to r rupture with comfort safety and at the same to allow the rupture to Weighing but a few ou this new discovery gives al freedom in movement. It car detected beneath the tightest clothes; planned @o that it washed daily It has healed thousands, hundreds of people who t active part in athletics. Send for free trial offer, sent i sealed envelope. BROOKS APPLIANCE CO., 107B State Street, Marshall,

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min- ial at Stops Oostal Oo. rado re ay ————— ee ereeeeenstse POPULAX MECHANICS ADVERTISING SECTION 41 LLL LidddddidddddddddddddddddddddaddddddddduahhLQnunnnnaaqnnnaaazEZZE S7. It’s the man with the punch who battles his way to the front in life—he’s the chap who gets on, is sought for the good jobs and is respected and admired wherever he goes. You needn’t be a pugilist, or a wrestler, or a professional athlete. You can be just an every-day fellow like Lind- bergh and young men of his type, with plenty of sand and courage and manly strength and vigor, to stand out in the crowd and carry off life’s prizes. Muscular Strength and Perfect Health Go Together You can attain strength through Lionel Strongfort’s scientifie mus- cular development —internally and externally—and vigor and health and a full-functioning body comes as sure as sunrise. I’ve taken thousands of young fellows, skinny, weak, and built them up into strapping, powerful men who commanded respect and admira- tion wherever they went. Some of these chaps had set too fast a pace for themselves, others had wasted their vitality and broken down their manhood, others had gone stale from neglect of their bodies. No matter how despondent their state of mind or how physically broken they were they quickly came back when they adopted STRONGFORTISM The Science of Health and Strength | STRONGFORTISM works wonders with run-down, weakly, skinny / men. It builds them up to health through internal muscular develop- ment, then rounds them out into robust physical specimens, by bringing into play every muscle and making every muscle do its work as Nature intended. You'll be astonished how quickly you'll feel the benefits of this best of all health and strength Courses. You'll feel like a new man ‘ almost from the first day you start under my instructions. You'll be surprised at the lazv muscles you wake up when you begin, and they'll wake you upinturn. You'll quickly realize that a new day has dawned for you as you N feel the red blood coursing through your whole body like a bounding mountain strean That old, stupid, sluggish feelirg will disappear like magic. That gloomy outlook will & vanish »s though 9 heavenly hand had brushed it away. Oh, it’s a great feeling! Great . to feel like a man! And N you surely will when you secccescececcesesuceest’ adopt Strongfort as your instructor and guide Strongfort, “‘the builder Send this FREE Consultation Coupon ABSOLUTELY CONFIDENTIAL Mr. Lionel Strongfort, Strongfort Institute, Dept. 635 Newark, N. J.—Please send me absolutely free my copy of your book, “PROMOTION AND CONSERVAT 1ON OF tte ALTH, STRONGFORT O Builder of Men of men.” « I Want to Send You - . . . . . . . . . : ® STRENG TH AND MENTAL ENERGY. I have marked , 8 (x before the subjects in which I am most interested } MY FR bE BOOK . Catarrh Overweight Great Strength | . Colds Constipation Lung Troubles } ° Asthma Weak Back Round Shoulders } s book of many pages and dozens of pictures tells of my §& ..Headache Weak Eyes Stomach | nderful experience—how I became the outstanding athlete § Rupture Rheumatism Disorders } we oe pertotmins feats — — aat attempt; how : jcaue ea g ae & oes Height a ned the knowle ge gained t 1rougn devetoping my own . ’ We 2 Devel “nt ; to the benefit of others, and then how STRONGFORT . Insomnia eak Heart evelopmen ’ \l was evolved. It tells what I have done for others, what §& in do for you It doesn't mince words It tells plain & Other Ailments t Promoti m and Conservation of Health, Strength & Me ental Energy,’’ points the way from disease and weak- § to health and ee ngth. It is priceless. I'll send it to 5 Nam« 1 on request—FREE. Write for your copy today 4 : | STRONGFORT INSTITUTE b ae _ . . LIONEL STRONGFORT, DIRECTO H Physical and Heaith Speciatist § Street DEPT. 635 NEWARK, NEW JERSEY, U.S.A. . Z ZZ VILILILALLILLLILLLLULLLLLULULULULUL UL Sta POPULAR MECHANICS ADVERTISING SECTION 43

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Learn to HYPNOTIZE 5 DAY TRIAL - NO COST IF NOT SATISFIED Gain New Power! UIT being just one of the wows! Q others admire and obey yo Stand out—dominate— make POPULAR MECHANICS Learn how to bend people to your will; how to develop a winning, magnetic personalit how to gain popularity, success, big money—by the SE OF HYP- NOTISM. In just a few hours, I'll show you the inne Tg! f this mys- terious force or the Five Days rRIAL is FREE ! I'll show you how to develop the hidden ger Lit DP wer W thin yourself Once you know how you can use it i e Zz obstacles, achieving your fondest ambitions and becon ing ™M AS’ 1 ER of your- self, friends and act jusintances either se see for yourself how Hypnotism can bat ish fear rT nd opposition—improve your memory increase your earnings ind force others to give you the pood things in life th it you desire! In his startling NEW book “The Science of Hypnotism,’’ the world SEE famous hypnotist Prof. M. Young reveal . ref guarded s How To Hypnotize this f i at a Glance yer re ie et How To Hypnotize the ni tis I i By Telephone Mi I athy, how ) r How To Give An Sen ae Baer og tors : Entertainment ing, “ wake e sub je How To Make Others Obey You How To Do Dozens of Hypnotic Feats Try! 5 Day: s papain ~~ Money great n kly t v the science of Franklin Pub. Co., Dept. W-70 800 N. Clark St., Chicago, Ill Franklin Pub. Co., Dept. W-70 800 N. Clark St., Chicago, Ill. . | y z ny k . t ‘ , } Prof y Ww ‘ $ I & i N i t Street and No C0 a ee Stat If you a k t tw I an ca end $2.50 w and w pay deli y iarges Customers ou i ~] t ~ j AA DHDITT ADVERTISING SECTION Save Y¥ When all else fails, end your evffering with the Heefner Arch S No ee Fully patented. Itre-adjusts the entire foot. Write for free book and statementa from doctors and users. iHeefner Arch SupportCo. 667 M. E. Taylor Bidg. _ Louisville, Ky NO JOKE TO BE DEAF —EVERY DEAF PERSON KNOWS THAT I make myself hear, after being deaf for 25 years th these Artificial Kar Drums. I wear them day and night. They stop head noises and ringing ears. They are perfectly comfortable. No one sees them. Write me and I will tell you a true story.how Igotdeafand how I make you hear. Address Medicated Ear \rum GEO, P. WAY, Artificial Ear Drum Co. (inc.) 80 Hoffman Bidg.. Detroit, Mich LUCKY POCKET PIECE, triple ! shoe poe, always keep one with you— 10c, 4 sets 25c pp., with secret solution Western Puzzle Works, St. Paul, Minn. Skin Troubles Cleared Up=—Often In 24 Hours Pimples, Blackheads, Acne Eruptions on the Face or Body, Barbers Itch, Eczema, Enlarged Pores, Oily or Shiny Skin. ‘‘Clear-Tene’’ has been tried and tested in over 300,000 cases. Used Like Toilet Water. It is simply magical in prompt results. At All Druggists, with proven directions, ASK YOUR DRUGEIST—You Can Rely On Cilear-Tone lear-Tone [ vRase Mane Rae Z MARK REC. FOR THE SKIN AND COMPLEXION Stop Using a Truss STUART’S ADHESIF PLAPAO-PADS are en- tirely different from trusses—being mechan chemico applicators made self-adhesive purp: to keep the muscle-tonie ‘‘PLAPAO” continu applied to the affected parts, and to minimize ful friction and danger of slipping. No straps, Soft as buckles velvet—easy or springs to apply— attached inexpensive For almost a quarter of , satisfied thousands report success without delay work. Stacks of sworn statements on file. Process of re natural, so no subsequent use for a truss Awarded Gold Medal and Grand Prix. Trial FREE of “Priapao” will be sent you absolutely No charge for it now or ever. Write name on coupon send TODA PLAPAO CO., 588 Stuart Bldg., St. Louis, V'o N AITI® , cece reer cece eee eet Oe eseeseesesesseeeseeess® ee Tere Tere FREE-—Trial Plapao—FREE AD WEOEDUANTSOC ATrMITEYDPyTIrOorarer cemnrmnar

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AF ‘HAT ; ition Minn. ———. / urs Face pres, tried Like ympt woOns, | On [ON POPULAR MECHANICS ADVERTISING SECTION 43 The Most Amazing ree Discovery in 10 Years! Astonishing Magic Fluid Restores Ori ginal Finish To Old Cars in 60 Minutes! {INK of it! Old cars restored their original color and vroom lustre. Just a sweep of hand—and the dullest sur- becomes a thing of beauty! This kable fluid discovery actually forth the original color and f any kind of finish—whether i, lacquered or enameled. original color and mirror-like gloss right before your very eyes!) ... And then before you realize it, the trick is done! There stands your old car, glistening with its new coat of NAVON like the AGENTS! day when you first climbed back of the wheel and pushed the starter button. Safe—Durable—SURE ! Results with NAVON are absolutely $100 to $300 A WEEK So astonishing is NAVON that demonstrators and agents every- where are simply coining money for just a few hours’ work H Geiss (Ill.) cleared $300 in a single en- tr NAVON is truly “liquid Magic’’! certain! You don’t have to be an expert week! And J. Porter (Wisc.) made ts call it “the most surprising auto to get 100% perfection. It's almost as $98 in one day! 1CO- very of the decade.” It is not a easy as washing—dries smooth as glass All you have to do is let car not a polish .. . not a cleaner without streaks. No harmful ingre owners see what NAVON does! ot a paint! Nothing like it has dients. Resists wear and weather. 9 out of 10 want to order instantly! And every order means real cash in your pocket! Even spare-time lasting as they are astonishing! workers often make $10—$25 on Saturday afternoons, etc., just 7 . W orks Like a Charm ° . showing NAVON to friends, neigh > Test It Without Risk! bors, etc. Wonderful opportunity asy But perhaps best of all is the ease to build permanent, profitable which NAVON can be applied. Réght now we are making a special business as NAVON Service Sta a ist put it on the car right out of introductory offer which allows you to tion Operator, too. Write to-day . an—guiding its flow with a pad test NAVON without risking a penny! for generous offer to order-takers ive eese cloth. No fussing with brushes See for yourself what this amazing dis and extra-special test offer for esome rubbing. (It’s more like covery can really do! No obligation. agents! Check bottom line of than work—especially when Just clip the coupon below and mail it oupon and mail it now! ee your car actually regaining its to-day! FT | VAVON ha Yet its results Can't crack or peel—and lasts for months! Ends need for bothersome polishing and users write that it in- creases re-sale value $150 or more! be en seen be fore. SSSSSSSSSSSSSSS ESSE SSS SSS SSS SESS SEER SESH KRESS eee eee eee, Consolidated Specialties Corporation (NAVOWN Division Dept. 56-W, 21 W. Elm St., Chicago, Ill. Without obligation. send me particulars of NAVON, together wit NO-RISK TEST OFFER INSTANT REFINISH NOW! FOR ALL SURFACES FLOWS ON—STAYS ON—EASY TO APPLY cE Consolidated Specialties Corp. V. Elm St., Dept. 56-W, Chicago, Il. > r Town Check here if interested in NAVON FESR eee SCOR eR eee eee eee POPULAR MECHANICS ADVERTISING SECTION 15

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44 POPULAR MECHANICS ADVERTISING SECTION FREE To Men Past 40 WELL-KNOWN scientist's new book about f\X old age reveals facts which, to many men, will be amazing. Did you know that two-thirds of all men past middle age are said to have a certain sel dom mentioned disorder? Do you know the frequent cause of this decline in vitality? Common Old-Age Symptoms Medical men know this condition as hypertrophy of the prostate gland. Science now reveals that this swollen gland—painless in itself—not only often cheats men of vitality, but also bears on the bladder and is often directly responsible for sciatica, back- ache, pains in the legs and feet, frequent nightly ris ings, and dizziness denoting high blood pressure When allowed to run on it is frequently the cause of the dreaded disease cystitis, a very severe bladdet inflammation. SSCSSSCSSSSSSSSSS SSS SESS SEES SEEE EERE ERE THE ELECTRO THERMAL COMPANY 2112 Morris Ave., Steubenville, Ohio Please send me Fre e, and without obligatior . . . . . . . . : r 1, a copy « s your booklet, “Why Many Men Are Old At 40 Mai s in plain wrapper : 4 Name . 4 i 8 Addres : s Cily State = $10.00 PER MONTH BUYS Fibre-Life Limbs NEXT TO NATURE. BRACES MADE TO ORDER. rors samece WORMANCO, an ° FIBRE SAMPLE . | (RRO R RRR RRR ERE R Eee eee eee AGENTS 252-P HENNEPIN AVE. MINNEAPOLIS, MINN VIBRAPHONES revive hearing by utilizing and intensifying sound waves through the small silver devices that fit the ears perfectly. Powerful vibrators and intensifiers are built in- side the small and almost invisible instruments. No wires. No batteries. Nothing like them. A new and scientific triumph that produces marvel- ous results. They stop head noises and improve hearihg—often restoring it to its normal functions Don’t be handicapped orembarrasedanotherday Send $10.00 for a pair of Vibraphones Satisfaction guaranteed or your money back VIBRAPHONE COMPANY (Reg.) Sept 8 Central Nat’l Bank Bidg. St. Louis, Mo. ee 2 i ene Gea o ee 65% Have This Gland Disorder Prostate trouble is now reached immediately by a new kind of home treatment—a new, safe hygi that goes directly to the gland itself, without dru; medicine, massage, lessons, diet or the applicatior electricity. It is absolutely safe. 50,000 men | used it to restore the prostate gland to normal { tioning. The principle involved in this treatment recommended by practically all the physicians in Ar Amazing recoveries are often made in six days Another ful effect is usually the immediate disappearan t constipation. Usually the entire body is toned up as 1 your youthful vigor is restored [hese results are guarant Fither you feel ten years younger in six days or t tr costs nothing. Send for FREE Book If you have this gland trouble or if you have any of t toms mentioned above, you should not lose a day in writi the scientist's free Book, ‘‘Why Many Men Are Old At 40 will enable you to ask yourself certain frank questi reveal your true condition. Every man past 40 | this test, as insidious prostate disorder often leads to This book is absolutely free, but mail co pon imm lat the edition is limited. Addr THE ELECTRO THERMAL COMPANY 2112 Morris Ave., Steubenville, Ohio If you live West of the Rockies, address The Electro Thermal Co., 303 Van Nuys Building, Dept. 21-M, Los Angeles, Calif. In Canada, address The Electro Thermal Co., Desk 21-M, 44 Yonge St., Toronto, Can Information on any book free. Write Popula: Mechanics Press, Chicago, Ul. QUIT TOBACC No man or woman can escape the harmfu] effects of tobacco. Don’t try to banish unaided the hold tobacco has upon you, Join the thousands of inveter- ate tobacco users that have found it easy toquit with the aidof the Keeley Treatment. TREATMENT KEELEY, 572" Tobacco Habit Quickly banishes all craving for tobacco. Write today for Free Book telling how toquickly Free yourself from the tobacco habit and our Money Back Guarantee. THE KEELEY INSTITUTE Dept. A916 Dwight, Ilinois

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POPULAR MECHANICS ADVERTISING SECTION 45 Patented ~ | New Kind of Can Opener | Astounds Experts..].Ends All Danger t There never has been a can opener even remotely Old-style, dangerous can openers must go! No like this new invention. It has been approved by longer can any woman afford to risk infections usehold economy experts and thousands of that may endanger life itself. Speedo ends fuss usewives. Salesmen in America are literally be- and muss, bentdies danger forever. That’s why ming rich through it. For Free Test Offer and women everywhere welcome Speedo as a literal mplete details mail the coupon. godsend. $ with absolute confidence—and tests made Agents 2,200 from Maine to California now prove that 4 in a Month out of 5 prospects will buy this new inven- ] secret that women hate to open th the wasteful, dangerous, old- opener. It’s risky even fora + oy Aen f a cs >. “ee ati t " - top -_ of A can eat 7 Some profit records with Speedo tion on 2-minute demonstration. 1 nd-hack type opener . lare so hue as to be almost beyond Every home welcomes you with open arms g from sardines to asparagus is belief Yet the facts absolutely when you show them this truly modern meth: . cans, People hate c an openers peak for themselves. For ex- of doing the job they now detest. Speedo sur se them. Briefly, that's the con- ample : : Dickinson, Idaho, sold prises everyone It takes hold of the can nted to Speedo agents today— $2,200.00 Speedos in a month (his cuts the top out slick and smooth inside the _ cing - . rofit over $300 every week!) rim-—flips up the lid so you can grab it-—then iation almost unprec edented in arclay, N Y. reports $117 clear hands the can back to you without any jagged x tield from a big-profit standpoint. rofit in just 2 days. Mrs. Homer- edges to snag your fingers—all in a couple of , ow, O made $7 her first hour. seconds, at the turn of a crank Just think Approved by All Authorities Scores of others are making money what an amazing demonstrator such a device illy every noted domestic science the same quick, easy way. A must be! \merica has tested and ap- twin’ Speedo invention makes There is nothing else like Speedo. It is made Speedo—the amazing new auto- this possi “le anywhere. Get the B k of heavy steel and will last a lifetime The pening machine. Facsimiles of facts. Actat once. FREE TEST manufacturer guarantees it in writing for five ps of approval of some of these OFFER—MAILL COUPON, years! Agents make real profits on every sale ire shown on this page. Every . Mail the coupon for full details and special — : money-making offers. ics e knows what it means to have the . = an ! of Good Housekeeping Institute, - ; Central States Mfg. Co., Dept. W-702, * P 4500 Mary Ave., S Mo. It means that they can buy St. Louis, ! = _-. Works Like Magic No More Cut Fingers or Oval iCans r | inique invention is called » Can Opener It has much talked about everyone has heard of t magical way it works. 5 Caneset Seance Mie.¢ Co. Dept. W-702 sold only through local 4500 Mary Ave.. . Louis, Mo. tives and agents. Al- Please rush me the facte about Speedo and your FREE TEST , and women, too, OFFER. mes ranging from $3 to n hour both spare and Name... ...+++++ . .* NO JAGGED EDGES FOOD POURS RIGHT simply mail coupon for out exclusive territory, Address... . . a “ » t ivertising, complete “— I ef ilso FREE SALES Town.. State. ‘ slick Y ind FREI TEST CiCieck here if interested only in one for your home anc . A ‘ M; iil it today aut . c . ae DMDITYT AD WEMWAAISMO ARVCITEemrrerrarn or Awe

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16 POPULAR MECHANICS ADVERTISING SECTION

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- eS | of With Violet Ray Vibration Ozone Medical Electricity The Four Greatest Curative Powers Generated by This Great NewlInvention! Eleo Health Generators at last are ready for you! more health—greater power to en- joy the pleasures and delights aboutsyou, or if more beauty is your desire—write! Ask for the book on these inventions which has just been prepared. It will be sent to you without cost. It tells you how Elco Health Generators aid you in leaving the lethargy and hopelessness of bad_ health and weakness behind forever Re-vitalise your- self. Bring back energy. Be wholly slive. Write today! Here’s What Elco Users Say— “Wouldn't take $1000 €éco Electric Health Generators me more good in 2 weeks than doctors did in_ three tal “Cured my Rheumatism.” “My, Eczema gone ‘Cured, t “Cured my weakness.” “Now I sleep soundly all night » my strength and vigor are back aa more pain * ““Chronic Constipation banishe se great new inventions generate Violet Ray, Vibration, Eleo- Free Trial icity and Ozone—combined or separate. They operate on the ; lectric light in your home or on their own motive power at less than 50 cente per year leo Health Generators are positively the only instruments tfit Electricity, Violet Ray— r four greatest curative agents. end the coupon below. Get the Free Book NOW! MAIL COUPON \teath for FREE BOOK \fows, \P Do not put this paper down without sending \ Be the coupon Don't go on as you are with pains and with almost no life and energy. You owe it to y self to be a better man or woman. You were put

my stomach “Thanks to “Colds never bother me

here t y life—not just to drag through it. So do not rest a er day until you have put your name on the cour re That will bring the whole story of these great new ventions Do it today—now. S'seeeesescesess Lindstrom & Com pan y***ssssssssenaes = 2322 Indiana Ave. Dept. 13-59 Chicago = Please send me your free book, ‘‘Health—Power—Beauty” and s full information of your 10-day Free Trial Offer. If you want.

. ~~ - s Namé......00 ‘ PPeTTT TTT TO TT TTT Tt peaabenus 7 . . H PEEP rr TTT CrrrrT Te eT TT TT eT eT Ee tt ot Genascence eseansee suceacecacad

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Get Complete Training In One of America’s Largest and Most Elaborately Equipped Air Schools What counts in Aviation? Maint Training! Ordinary methods oom mean nothing today Only skilled Instructors and up to date equipment can fit you for success When you take the

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bs are waiting ‘ uates ot pur . Advanced Mechanics Course ~—* We use over $150,000 wortd Complete Pilot’s Course siadl Gavlomanr te at Parks you'll see our fleet oe a cneinee You of 26 new-production ships, factory productior large and small, open and ify for field duty, factory cabin types. You'll see Whirl- mans and superintendent's | , wind, OX5, Caminez, His- po “~ , hitie — pano, Velie. Liberty and other mmediate action will get a motor Our fift Soman & snort ~ her " pil te will tea v ranches of — » an i gots y = , ton flying You'll get A N gation, leads to salaries of from $30 Meteorologys Airport Manag r month! ee FREE BOOK Send for

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Maga shed thly at Chicago, IIl., for Oct State of Ilinois, ¢ ty of ¢ k, oe Before me, @ notary ¢ > in and for the state and county afor peared H. H. Windsor, Jr., w aving been duly sworn accord says that he is the editor and t es ar \ that the following is, t be ownership, manage above capt re i by the Laws and Reculations, pr d names and address s of t t are: Publisher, P ar M ‘ H. H. Windsor, Jr 1) East ¢ arc 200 East Ontario St I Ontario St., ¢ ag S i r and id 2 " s of « r “ rs ft s I “ i a sand ad f i be gi If « a fi ra j " “ se of k t ‘ St., Chicago, I j Winds Ir., 2 ( 4 I 1 t “ j wri 1 r a t rt 4 808 e. I gravhs nex v i t 4 t ers, stockh — ifa r ® khold d rs ae the ks ) " wher j on appears ur k . " st i na ft I f “ a € the said tw 2 \ t r é t's x “ as to the liti i i se “ j r ks of t “ i k in a " r t a fid A be . t ° , indire the said s t r aa #0 stated WINDSOR, Jr.. Editor and P sher. Swort and bacribed before day of September, 1928. J. GRAHAM, Notary Public. My commissi June 16, 1932

TELEGRAPHY (Morse and Wireless) and RAILWAY ACCOUNTING, taught tt Ug salaries; great opport ties. Uidest, largest » | Endorsed by Railway, Radio, and Government of penses low—opportunit ials Ex . large portion. Catalog free. DODGE INSTITUTE, Jones St., Vaiparais< i Ornamental Iron and Bronze Draftsmen. $50.00 to $65 a to trained men— up to $500.00 a month to experienc We train you at home and help place you when ready. D greater thansupply. Get out of the rut — write today f information and booklet “*Knowledge—Your Greatest American Institute of Ornamental tron & Bronze 3075 Hennepin Avenue, Minneapolis, Minn. Please M

Popular Mechani

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POPULAR MECHANICS ADVERTISING SECTION weeks to job | sz Guarantee If, after completing Earn $75 to $125 a Week As Auto Expert my training, you are not satisfied, if you are not qualified to accept a big-pay job, Eight your tuition will be eee refunded training are taking

Learn the auto and tractor business by the McSweeny method, then step out and get a good job at $75 to $125 a week or open your own repair shop Suxh «wibpiedneueee Street Auto, Tractor and Aviation : Department Town State

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BEA THESE LEWIS HOTEL STUDENTS “MADE GOOD” HOSTESS 7. Freed, Phila., Pa.— thout the training of Lewis Schools I could

We Put You in Touch with Positions Without cost let us show you how big pay, fascinating work, quick advancement can be yours in the great hotel industry. Age

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t 4 is no obstacle—-young and old alike have equal chance 1 ever ive secured the for success. A common school education is all you need with the / . ; nh of Assistant Sup- amazing Lewis System of Sparetime Training in Hotel Operation. iso, Ind. ‘ tendent of Service. Previous Experience Unnecessary Hundreds of Lewis students are winning success. Totally unacquainted with hotel work before tak- ing the Lewis Course, N. Frank Hills is now Thompson.—“ Am wer of a Chicago ent Hotel. My work ou enabled me to se- at's

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48 POPULAR MECHANICS ADVERTISING SECTION [EARN AVIATION IN T a AVIATION CENTER ne LOGICAL PLACE vo ocourne vou wt tom “TQ LEARN of the future bce ad Where to f oe SERVICE ] > » ste | The er l ‘kK 3V i The aviati : 4 MEN answer is quick andeasy . . . . Detroit! »aviation Z center of the whole wide world. In Detroit the aviation Sa N E . D ED Pay Roll is highest of all cities. That’s what counts, not ~ number of companies, or even the number of “Aviation in. the pl: ines, but the pay roll Here the great ones are,- —_ p : ld ¥ ad Tr . Servic l ld say- Ford, Packard, Stinson, Warner, and others. The ‘£- . A field, ‘ ar nly - executive of Airer: LEARN “or"iiSbern Development Corpo tion, Detroit, ‘wants fello mammoth urports now being established willing to learn the gare re uv lay es a tep head n Detr oit ,—the bE rr . ] marvelous motor city Take jou place NOW in the ground “Up. The fellow aviation,—this thrilling, profitable business with its CAPES masters the care of planes from t tremen«d 7.4 , : ° smallest detail, can go far.” trained service men needed to ev: flyer. THOROUGH COURSE Thorough training is the key to success. The old reliable “ Michigan Stat with its twenty years of training experience,— ENDORSED T | offers you a th rough, i ntensive trainir ty Bt BY LEADERS TROI work 8 n d fyi ng. Under experts. Over : } 5 _ 34: A ANE INDUSTRY 400 on rs in our ground cours 5 \e lhe great Eddie alone; fits you from A to Z to go US re tite Stinson, other business into this business. Michigan : a) . leaders and flvers, highly endorse this Mi higan State 4 Aviation School training.—and ( "STATE AVIATION State Aviation School is not a correspondence school, but a practical, actual training school. Students come here from practi illy every state and several foreign coun- -} 3 properly qualified men. tries, because the M. 8. A AC Tl Write us today for de- S. in Detroit, the aviation ~ tails. Or just write your enter, offers training . whi ‘h cannot be shtained “% NOW name on the blank be- elsewhere. y low and mail it. A. G. ZELLER, President and General Manager MICHIGAN STATE AVIATION SCHOOL 32 Aviation Building, 3719 Woodward Ave., Detroit, Mich. INFORMATION Street or R. F. D. No. ; Town State the opportunity ior N | MP Prerryrerre?T Te Trererrerrrericrecer Ty Tee qesssceceesescen: cee eee ee eeeeee rr DMNYPITYT AW BOM AATIOMO arterremnrararA ioawrAeemT Aer

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a POPULAR MECHANICS ADVERTISING SECTION 49 BARBERING Now One of the Highest Paid / Professionse 4 9010150 Every Week! William McClintock, President Master Bar- bers’ Ass’n of Chicago and proprietor of the highest priced rented shop in the world, says, **My son, who learned at Moler’s, is top man in my shop every week. I gladly recommend the Moler System as the proper place for men to become successful barbers.”’ —WM. McCLINTOCK. BE A ** WHITE-COLLAR’’ MAN— Earn $90-$150aWeek—CLEAN Money! he use of doing dirty, greasy, hard work, when you Y make TWICE as much money in a manly pro- it is CLEAN, profitable and full of opportunitic

“The XXth Century," “Oriental Limited” and other crack trans -continental I Ni] trains carry barters. Hin LL

Easy to Learn — ough MOLER training in the ap- plication of all the latest sci Quick to Earn? Barbering methods includi } Electric hair cutter, the mecha \RBERING for YOU! ical massage, and the latest vogu part ol all it is thi in ladies’ hair bobbing. _MOLER barber is taught the also give special training M LER way, makes ladies marcelling and an ister Barber in a short practical course in the tr niensive training, at of skin disease r You soon step ton B vO h n Step, which oo wil Earn While you equip Learning! «ian pees, Ms. ‘ r ox SY W N A SeetheWorld,Too! “Where there's a Will there's a N S \ FWY WN - \N S ‘ arn BIG pav! W tet S fer, we will help you Way to ear ane =R a AY il job, with good pa‘ the — M : ria N \ gm NY *s SY sue A aks nti how you can earn wt i learn cract é s-C rt there ts one near you, and i al . 1 ‘ ile y cinar teeeiiaen: Aale taee the barber trade Ask for the ger trains, big luxu- new FREE MOLER Barbering pple. rp og ee Booklet B Find ut HOW 8 ch as mou MOLER helps y “Wy YY) Mb “iy UY) YH. Wy Z Z Ya \N SS Y

u graduat«

u help yourself r Shop rvwhere . : \4 > ee = , AFTER you graduate, as well l1OLER trained men BEFORE! Find angie MOLER Men ars raking MOLER Graduates (OU Bi Eth: none othe q | Are Always Busy! last year, before Ladies’ Shir \ > Bobbing _ became © popular » 30 Branches in United States and Canada Please send me without obligation on my part you Booklet B rk, N. Y Cleveland, Ohio New Orleans, La a itl Detroit, Mich Atlanta, Ga verre M Denver, Colo Memphis, Tenn Addr t M Omaha, Nebr Dallas, Tex : ti, Ohio Milwaukee, Wis. Houston, Tex City Stat DODTITT AD MECHANICS ANVERTICING CECTION ry

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50 <<. MILLER Director Extension or American School \

POPULAR MECHANICS ADVERTISING SECTION see a or obligation. away from the ‘‘copying”

The American School Atwo million Dollar No- Profit Educational Insti- tution, now offers men a double service—training for a specific job, then help in finding the job. For one small price, on terms of only $6.00 a month, you are now assured of definite benefits, both in position and salary. Write for complete information—today!

be built until first builds it No machine can the Drafteman ON PAPER. This training pre- pares you for this wor Never pas the world seen any thing lik iiding boom of today. This has creat ed. enor- mous demand for real Drafte- men

...

This new ‘“ Job-Method”’

“lessons.”

_the

BIG-PAY Branches The big money in Drafting goes to men who specialize in Machine Design, or Electrical Drafting, or Architectural Drafting, or Structural, or Automotive. It is not enough merely to know general Drafting practice. You must know how to calculate and design and plan original work. You need many Engineer- ing subjects to fill the kind of a Drafting position that pays $40 to $100.00 a week. The American School now includes this specialized training in its Drafting course. Win Success Thru Drafting Drafting is easy, fascinating work. Short hours. Big pay. And the Draftsman is always in line for promotion to executive positions. This training is complete. It includes high school subjects (if you need them) and all the Engineering and Mathematics Drafting experts require. jobs in a new one-step-at-a-time way. which you can understand almost without 1 We have invented a gives you actual draftin, With | And that is why the A: School-trained Draftsmen can qu a good job at big pay whi graduate FREE Job Service! The American School n fers its students and ates, without cost, the si of an efficient empl department keeping in stant touch with emplo Draftsmen all over the We have placed hand: men in good, big-pay 1) positions. We've mac: training so complete, so tical, so easy to maste our students are make good. And so, becaus mand for real Draftsmen cont exceed the supply and be: training actually prepares | good Drafting positions we | with a Free Employment S

Drexel Avenu 58thSt., CHIC

icatigepychoo We want y bourn: Dept. D-974

to prove you can new simplified way to teach Drafting i —the first real improvement in Drafting home instruction in history. few of these new Job-lessons, try them, test 7 own ability to master them—without one penny « For instance, you will see how w methods used in the pas you develop into a DRAFTSMAN, instead of a “‘t: See for yourself the ingenious new method which co: you to think, to soive problems, to do actual Dra/' room jobs from the very first lesson! A New, Rapid, Simplified Training Copying drafting lessons prepares you to be only a “t: } ack tf vice and ,\GO

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POPULAR MECHANICS ADVERTISING SECTION 51 learn at home in spare time! Draftsmen Wanted! 70,000 fine jobs advertised $ ! last year. Get ready to 40 to 100 a Ce fill one. Get out of the rut. Make something of Plan your future in Drafting. Even if you have only common schooling, vou know nothing of Drafting, we guarantee to make you a real Draftsman i your money! brings complete information. With You ro te et is Con ntract e-train- cape ae _ yu sree Wi ee . Drafting, We - ing} ¢ ining, lete Drafting i 1.€ omple bate -Metho¢ new Pra - eta bo son at as subs in pay» d every or we'll refun * money: Draftemen nerete and i rk ie Many big-pay io Director Extens Coupon _ Brings 3 Lessons FREE! Get them. Test your own ability to learn Drafting and get ready for Read These Letters! ‘ f Chicag Liberty a fine job and big pay. ity o cago 7 ‘ Department of Buildings io gl Coupon also brings n: The same day I re- enon, 5a. complete information my diploma I got word Dear Sirs:—This is . vas one of the two candi- to thank the American about vour oppor- had successfully passed School for all that you havg tunities for success in nation for Deputy Com- done for me since I signec D rt Mail f Buildings of the C ity up for the Drafting and De- rafting. ail It Today! :o, & position paying sign Course s ear pom paying In the eight years since then, I have i. gracuany limbed from the posit of re eight applicants ex- er to that of Head of the Department ’ ’ ides myself, all men of Ma hine Draw ng and De “sign u la in to the are hitectural magnificent new $2,000,000 High ‘ al here, at many times the salary wh rive protesion, Seven Fenway Lessons ed to obtain a passing The official ‘ls { Pennsylvania My grade was 84.69 State Department, ar a Dr W m.C. Ash of f Bare thie same the University of Pennsyivani, 7 @ °C: MILLER. Director Extension Work ¥ efore, my present that our ouree in Drafting and i > ‘ 4 due to the knowledge is the best now being tauzht in t! AMERICAN SCHOOI ‘ your School Every drafting graduate that we have Dept. D-974. Dr Ave. and 58th St., Ct 8 very truly turned out has proved eusconn l. and « ROBERT KNIGHT is now Chief Drafteman in local steel . concern. Yours sincerely, e ’ . 8. LE: Got His Draftsman's Job . — 4 thet (ane ee ail Co. Has Charge of Large Jobs i was to start and have a "Even before I had fin shed my course, ~ «, and I am stiil the I wae put in charce of large constructic The engineer seen es oe ili jobs in different cities have been - . and © oth ing that ever since, and the * are get- the “ol very ting larger all the time I s at thie place, because yo to the American School . endati on helped me es knowledge I eained in m . calculations hERNARD WERER, ELMER L. LAMB, las Ave., Dayton, 0. 1306 Smith St., Peoria, Il

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ao t ED BOMBr 1E BAT PLANS ER Positively a of- sensational fer Here's the Red Bomber | Combat Model Plane, a twin propeller model that flies amazingly And you can have it free! Boys every- where are flying model planes. Now is the time to get yours. This sensa- tional plane will fly 600 feet easily, often further Wings made of special fibre, two powerful rubber motors, two cleverly fashioned pro- pellers. Not a glider—a real model plane. Assembled in two minutes Best of all no tedious hours of toil constructing. This plane can be put together ready to fly by any boy in less than two minutes— positively! Two minutes after the postman de- livers your plane, zou ean send it into the air diving and dipping, zooming, banking, then soaring to greater heights Every boy will envy you. Order your plane right now! THRILLING BOYS MAGAZINE THE OPEN ROAD for BOYS has 50 pages crammed with stories of aviation, mechanics, sport, high adventure, great serials, jokes and humor. Correspondence club. one sts galore for all. ‘*‘Golden ) Medallion,’’ mystery serial smash now ’ starting—breathless reading! We will send you the Red Bomber Combat Plane and a subscription to The Open Road for Boys Magazine—12 fat issues—both for $1. Send the coupon bow. FOR ONLY StS SSS SERSSERSERSRES SSSR EEESS, . @ Pilot O'Hare, . @ Open Road for Boys Magazine, * = 130 Newbury Street, Boston, Mass. a Friend: a S By all means I will grab this offer. Enclosedis$1. Please @& s rush me the Red Bomber Combat Mode! Plane Entermy 8 @ ame to receive a year's subscription—12 issues—to The a e Open Road for Boys Magazine beginning with the very ® next number 7 idicvudhhinwegd.s iin kalekwkedhehakwedadnnes be * tbo obese ses ccadtdeseweses 4 Town or City raha | 2 POPULAR MECHANICS ADVERTISING SECTION SH] LEARN BY DOING Every phase of all branch ELECTRICITY taught by Actual Practice In one of America's forer institutions tor trade training ESTABLISHED 1902 No Books Used Individual Instruction Start Any Day Write for FREE 64-pa; THE NEW YORK ELECTRICAL SCHOO! 44 West 17th St, New York City A Brand New High Grate Fine Tone VIOLIN, TENOR BANJO, HAWAIIAN GuiTaR § BANJO, ; CORNET, UKULELE. BANJO UKULELE, We will give you without extra charge when you enroll, any Instr ment you select and teach you to play it by our NEW copyrig! —_ to learn home-study course Over 500,000 men, women, t nd girls have learned to play by our simplified mot 3 Co a few cents a day for lessons. No other char learn. Instrument and first lessons sent on FRE E era CHICAGO CORRESPONDENCE SCHOOL OF MUSIC, INC. 1632 No. Haisted St., Dept. 737 Chicago, Wil. ALWAYS Ask For DENISON’S—53 Yoors of Hits State ; . dh $ somedy-Dr amas Vaudev irces, Musics al P AYS Monologs, 1! : ‘comedies Revues, L Entertain! | Musical Readings, Comedy Songs, C halk Talk Books, M | Blackface Skits, Make-up Goods. Catalog FREI T. S. DENISON & CO.. 3S. Wabash. Dept. 9 ____ CHICAGt PATENTS Booklet Free Highest References Promptness Assured Best Results Send drawing or model for preliminary examination of Patent Office records. ALL BUSINESS GIVEN PROMPT AND PROPER ATTENTION Listed Patent Lawyer in the latest editions of the Rand-McNally Directory of Bankers and Bonded Attorneys, published by Rand-McNally & Co., & Ryall Directory of Guaranteed Attorneys, published by the Ryall Legal Directory Company, New York City; Flugel’s List, published by the Legal Directory Publishing Co. of St. Louis, Mo.; Chicago, Ill.; The Baggott the American Lawyers Annual, published in Cleveland, Ohio; Eyre’s Law List, Bush Terminal Building, New York City. WATSON E. COLEMAN, REGISTERED PATENT LAWYER Victor Building, 724 Ninth Street, N. W WASHINGTON, D.C.

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POPULAR aide

uccess in Radio the last two ). I am making finished my urse yet. I am grateful for > and co-operation to date k forward to still bigger success n I graduate.” Clarence Heffelfinger, Temple, Penna,

“I feel proud of my te. My profit d

amounts to I have not

; t Fe, oy. 35 hic emare time i oney Back If Not Satisfied VW ehe Lind af trainine ef \ 1. I have } t What Radio Offers You

. President 4HH, Nat R Institute, ston, D. C. ae book. Is . R : . x f Rad 3 I t

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54 POPULAR MECHANICS Go to High School at Home You can secure a high school education right at home by studying the splendid new courses re- cently prepared by the International Correspon- dence Schools. These courses are equivalent to the courses given in resi- dent high schools. They have been specially arranged for men and women who wish to meet college entrance examina- ness position tions, to qualify for a busi or to make up the education they missed when forced to leave school too seon. The College Preparatory Course, the High School Commer- cial Course and the High School English Course include Eng- lish, algebra, ancient, medieval, modern and U. S. History, physiology, literat« ger graphy, Latin, bookkeeping, drawing, geometry, shorthand, physics, chemistry, salesmanship, adver- tising, civics, trigonometry, economics, American business law, corporation finance, money and banking, business and trade economics, etc. A diploma is given at graduation. The lessons are easy to understand and you will make rapid progress because you will be in a class by yourself and you will study under the guidance of instructors who are sincerely interested in helping you to get ahead and achieve the bigger things of life. Just mark and mail the coupon and we will gladly send you interesting free booklets describing the High School Courses of the Iternational Correspon ce Schools or any other subject in which you are interested. INTERNATIONAL CORRESPONDENCE SCHOOLS Box 5580-F, Scranton, Penna. Without cost or obligation, please tell me hew I can qualify for the position or in the subject before which 1 have marked an X: C College Preparatory Course C] High School Commercial Course CJ High School English Course C) High School Vocational Course (C0 High School Agricultural Course [ Bus iness Management ] Industrial Management f ] Personnel Management ; rrespondence [ ] Traffic Management Show Card and Sign LJ Accounting and C.P.A, > Coaching 0 y und Typing (1 Cost Accounting LJ En: Civil Service L) Bookkeeping [) Railway Mail Clerk CJ Secretarial Work [} Common School Subjects LJ Spanish (J French (J Illustrating () Cartooning TECHNICAL AND INDUSTRIAL COURSES [) Electrical Engineering ] Architect [| Electric Lighting (_) Architects’ Blueprints [} Mechanical Engineer [} Contractor and Builder 1 Mechanical Draftsman | Aochaites tural Draftsman _] Machine Shop Practice [} Concrete Builder }] Railroad Positions [ i Sere tural Engineer ]}Gas Engine Operating { ] Chemistry (J Pharmacy ic ivil Engineer [) Automobile Work } Surveying and Mapping { } Airplane Engines }] Plumbing. and Heating L) Navigation } Steam Engineering } Agriculture and Poultry L} Radio C] Mining CJ] Mathematics Name ‘ siievnestasidiblenbiveiaesdiiiaiiies Street AGATOSS. ..... cece ceeccececceceecenecceeenerereceeeensenereeeeseneccnsesseerenesenereeaeenssnengpeenee i icaconsisianiseasinied BRBRG. .cccceserececssssee a TyrsiyreryTry ATT aerwmmrrrmyaarrsr ADVERTISING SECTION NEW INDUSTRY NEEDS MEN ___COMPRESSOR (CONDENSER | a ER APORATOI | REG El} p LEX ANSION VALVE ELECTRIC REFRIGERATION Calls You! $200 to 81 Fastest growing money- a aking field— backed General Electric, etc. New easy home trainir pay job This training endorsed by Servel other large manufacturers. FREE BOOK Newest American industry need rod $200 to $1, 000 a month jobs in Dp ap by General ™M iz qualifies y f Kelvinat installation is Opportunities in Electric Refrigeration’ re- veals amazing plan to ambitious men Sent free. No obligation Be tne first in your neighborhood to get into this new magic in- dustry. Write today. Utilities Engineering Institute, Dept. 112. 3120 N. Clark St., Chicago, Ill. ~Make Much Money.. | Making Form- and Selling Your Own Goods. | ulas by experts. Manufacturing Process: Trade-Secrets. All Kinds. All Lines. Se for interesting catalog, special circulars, fre W. THAXLY CO., Washington, D. C. Become a musician so quict tound everyone Learn b I i music nstead of tiresome cises.”’ i'll soon become the popular person in your “‘set New Easy Method is a revelation Nothing else like it oughness and rapidity so simple tha and old find it easy to ) pl with ama No “trick music but actual learned quickly right in LEARN TO PLAY ANY bome INSTRUMENT Piano Guitar FREE BOOK and Organ Mandolin ‘a Violin Drums and Traps Demonstration Lesson Clarinet Sight Singing Flute kulele offer this wonderful musical wed . ——— tunity Send for them toda eras romaone copies are exhausted You Cvoice _ —, astounded, thrilled, fascinated Automatic Finger Control easy, rapid way to become a ver Piano Accordion maste of your favorite instr Banjo Plectrum, 5-String or Instruments supplied when Vener cash or credit a — . Ss. SCHOOL L OF A MUSIC, owe ag Brunswick Bids. New ¥ York City Send me your amas Lessor ¥y He * wit duction by Dr Frank Cra tlso FREE EMONSTRATION LESSOS t put inder any obligation Please Write Plainty. NAME ADDRESS Ha I Picccccceseces . T-—_.t{tians....t27.t. 2. .t...7 t..

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a” a; This professiona “outfit od id 18) POPULAK MECHANICS ADVERTISING SECTION 55 NOW. Simp le METHOD At last—a quick, complete, fascinating way to learn Drafting, and learn it right! Experts acknowledge my new, simple, eas) “Movie Method,” without the use of dark rooms or projectors to be the first new idea in teaching Drafting in 30 years. It’s the most easil) grasped, sound and sensible plan ever devised for Home Study instructi —so clear, so interesting, so practical that almost before you know it, you're through—have finished—and are ready to go to work on a Big Pay Job Learn to Earn—$60 to $100 a Week That’s what the expert draftsman gets and he’s never out of work the year ’round—for he's the King-Pin of Industry—the man they've got to have. N a wheel can turn, not a brick can be laid, not a wire can be strung, until the jol has first been planned and drawn on paper by a draftsman. Why don't you get into work like that? Why don’t you be a man they can't get along without 1 Big Pay Man with a year ‘round Big Pay Job? You can—it's easy—lI sh wy i h yw! I’'ll Quickly Prepare You for Drafting With my new copyrighted ‘ vie Method,” I'll help you get ready for a B Pay Draftsman’s job so qu ly 1 will be stonished Spare time on! needed. With my method ist like “slow motion movies,"’ which are ser to you on printed pages—you see how it's done, and you do it yourself aln automatically. It’s amazingly simple—vyet so thorough and complete y learn Drafting from A . » Z—learn it so you can sit in with the best of them the Jobs that pay Big Money. Seuete Lesson FREE Don’t sign up for any Drafting Course until you've sticated my amazi! new “ Movie Method = M ail « yupon tor Big F R I i: "Book ind Sample Le son. See my great Earn-while-Learning Pl in—see the big Professional Draft ing Outfit you get at no extra cost—learn about my Nation-wide Job Servic my positive Money Back Agreement Mail coupon NOW! MAIL COUPON FOR FREE BOOK K. M. Boyd. Chief Drafting Engineer L. L. COOKE SCHOOL OF DRAFTING Dept. 19, 2132 Lawrence Ave., Chicago, Illinois. Send me your bool Draw Big Pay in Drafting” and tell r more a it you M e Met j This does not obligate rt inany way POPTITLARP MERCUWANTC?OC ANntronmnrraranr cnamtnca

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Electricity as Experts Know It/ HIS is the electrical age, with unlimited opportunities for the man who has educated himself in the finer points of electrical practice. Fit yourself for a big-pay job by knowing electrical practice complete, including inside and outside work, central stations, ind the whole subject. With the aid of the Croft books you can know line for an electricity as experts know it and put yourself in expert 8s pay. The Croft Library of Practical Electricity Flexible binding for easy A reference library and self-training course in eight volumes. 3000 pages —2100 illustrations In these volumes Croft teaches you electrical practice complete. He takes you in quick, easy handling steps from the simplest principles to the com- plete and economical operation of a great central station He tells you all that he has learned in twenty years of shirt-sleeve practice With these books at his elbow a man can learn as much about electricity in six months—good prac- tical “bread and butter" stuff—as he would Ordinarily learn in a lifetime of practice. (52000 The Standard in Practical tt Electrical Training Cre The Croft Library is a complete electrical educator Sets It is founded on practice—on work as it is actually done It is jammed from cover to cover with the kind of hard-headed facts you want Written so dl that the beginner can easily understand it, yet so preus sound, so the the daily guide of rougt that it is aid electrical workers 59,000 highly and engineers. Croft tells you the things you need to know about motors, generators, armatures, commutators, transformers, circuits, switchboards, dis- tribution systems—electrical tmnachinery of every type—-wiring for , wensersus powerful light and power—wiring of finished buildings—-underwriters and mot juipped with driving | municipal requirements—illumination in its every phase—the latest ley and two-blade fan, mount and most improved methods of lighting—lamps and lighting effects, on polis 1 base, bit etc.—how to do a complete job, from estimating it, to completion Aeon cont f Rut chanical toys beau Lily \ gem, you may have it free NO MONEY DOWN te Ona Rout ie ere M A Whole zine has 50 pages a m tl I . - > y 7 - with tlirilling fiction and art SMALL MONTHLY PAYMENTS : It is the hit of the year. Res Year of subscription price $1.00 a Fill in and mail the coupon attached and we We will send you 12 issue will send you the entire set of eight volumes | breathicss year's subscription—and thi | electric motor all for $1. for ten days’ Free Examination We take Order Dow . all the risk—pay ill harges You assume . no obligation—you pay ng unless you | decide to keep the books Then $1.50 in ten | days and the balance at the rate of $2.00 a | s month. Send the coupon NOW and see the ‘| books for yourself | Open Road for Boys McGraw-Hill Book Co., Inc., 370 Seventh Ave., New York Bieanetae. Dept. 530 Send me for 10 days’ free examination the Croft Library of cia | -~epmmane Street, Practical Electricity. If satisfactory I will send you $1.50 in 10 | | fii og ae days and $2.00 monthly until the special price of $19.50 is paid | Fe Friends: If not wi anted, J will returt e bo KS at your expense. To | Here's my $1. Rush me the electric motor and put insure prompt shipment é plainly and fill in ali lines.) | down for one year for The Open Road for Boys Magazin en ne ee ee ee ee ee eS ere : | MP PTETTETT CTO TOT TTT TTTT ITT TTT Te Address.:..... Se ee ee ee ee eee es Street erececcees eeececes eocccccsccccess Ne Bn oo 5 00006505 66060056 000600066 eocccvccere DOWD OF CIEY . ccccccccccccccccccscocccccscess PR thant arte dchidded tee deusetbdebedbenees beeeeae Company P. M. 12-28 SMD. sé Senbeedeeedevas bG4heeesabnadeesaeactdcavkbseseene > we 2 - ea * POPULAR MECHANICS ADVERTISING SECTION Ha ppy Because They “Make 60 a Day With This Newly Invented Suction Ash Receiver and Cigarette Holder For Autos, Homes and Offices Yes, you can make $60 00 My men aremaking that more right now with the | specialty created in recent Patented MASTER sr GRIP ASH RECEIVE! to any surface by a suct Ideal for auto, home a as Cigarette Holder or A Made of beautiful ey ake ute ir tinctive colors AN BI OGRAMMED WITH Ow S INITIALS, You don't mi in a hundred Retails for on Sticks YOU MAKE UP TO2 PROFIT! pom SeLL vo DEALERS nd CONSUMERS rfi t Sell place t t " t w by ifs $60 000d ‘ t others t suction nn SEND FOR SAMPLE OR A DOZEN start right off making $60.00 aday—send &3 ' dy ad take orders f te id tt “ ket $3.00 5 re ve by retu | be | Master A Re together w bh plans, s wing many ways of naking big m whirlwind GORDON MFG. CO., Dept. NM-9 110€. 23rd St., New York,NY DMNDITTYT AY AaArrmrrmraarrnene AWWA TATarT st Ae eee ae

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POPULAR MECHANICS ADVERTISING SECTION 5 its only a matter of hours now before gou can a started in ~~ wes B Hundreds of Men are Proving it ~ this Tested way RE'S a Job and Future for And NOW—to cap the climax | lin Aviation! A better job Hinton Training is available to DOZEN a se N y i could ever hope to have — every man who has vision enough to ACT = — — older industry. And a ba de Furthermore, this tested — There’s a Job Here for ves ‘ , ovetatis with your spare-time ou iture—packed with oppor- ‘8 Cov ere’s : ' I I I can keep your present job, stay at home, Her Lh R = rich with real rewards. eid Vy ops : Aviation and SUCCE F I : and prepare yourself for a real place and a . : . . D more, it doesn’t eall for iN AVIATION if you've Ma expt juiekK, proved Ww real future in Aviation A - tl f " rience in any other industr or mmmer- lor a big outlay oO! casn 2 Re ; cial work, Aviation rted in Aviation NOW. Get Hinton’s needs vou and Hin ¢ ton’s Course teach- * 4 Walter Hinton—one of FREE Book apt es to apply Thanks Hinton i s outstanding Aviators; This book tells yourself. Wood for Best Job \viation’s outstanding In- exactly how workers, metal | He Ever Had d structors—is train- Hinton trains workers, plane and At present 1 ; F you in every motor mechanics, v= emploved a Ing men at home to branch of the craftsmen of every - ‘ a — share in the growth Industry. How kind, airport nd eae “ ° 50% - + aote . office b and the profits of ? 8 only @ mat- vi a t At ter of hours be- managers the list Louse ts the Industry. Al. fore you cen & goes on and ort a. ready hundreds of ready for Avia- mit = fully s ° 1 r eve . ¢ ‘ ey 4 level-headed men tion! For every ¥ . was fro! , ’ spare-time hour Hinton and companion ri rave Ss specia edge I rece have taken his of study that pairing plane . « zed training. ar ai gh W training, gotten the you give his Amazon, surrounded } nding higher pay Hit y : , The clear, easy friendly native 1 bigger oppor- hain @ Walter Hinton knowledge that em Posees, hush oo eileen tie Bhan Mia plete ! ployers are eager tO pay you many fold with a comp slete, com nd o1 Cir secured this posi and today they are right prehensive knowledge of plane design and in this tastest-grow tion, which I con thick of all that Aviation is mstruction, motors, ignition, theory of ng Industry of all ee nh , - - : a. flight, princiglen of navigatior nstru Now it's your tur “art Rehnela il that it means. ments, commercial managem« very to CASH-IN > ur ; ri han " last fact you need to really first step t} ste . ’ Hinton’s Background Helps 4k ¢ something ot be ( . is Clinch YOUR FUTURE the Aviation opportunity h a ‘ ] 0 has done some of the most ‘t®8t s ready for you as soon as \ 4 por LongIsland,N.Y t it—SEND IT TODAY! ~ AVIATION INSTITUTE or U. S.A. Walter Hinton, Preside g things that Aviation has you are ready 1115 Connecticut Ave. Washington, D.C. een He piloted the first Ae id — en with only’a s icross the Atlantic—the little time to Rush to Washington His plane was the original — spare men wit “ r ay pee : no more than a * ‘ALTER HINTON, Pres., 1-M ig Zz " from North to South grade school ed- AVIATION INSTITUTE OF U. S. A j ] > snare ‘er . anenitiin at » 5 Connecticut Avenue ntil he soared over —- “yo Washteaten b ¢ 1 square miles of Brazil, * am axe8 ; seives into money- tohtt eend me A 2 lank eho no white man had ever making shape ne eee Oe eee @ he Upper Amazon River. Ql - po AT — money-making Aviation rrainit re ; i * law . strict. rately, rehably wit ring the War he instruct this proved method. Then our H ame ‘ ng recruits for the Navy- - Employment Dept. is helping ' . ‘warbirds’’ who quiciily place them in the real jobs treet Age : tha ¢ . Tk “ And for those who want to ' ‘the worth of Hinton Train- 720°) Flying, we get reduced — §city Stat rates at their nearest fields. sone meme ene eee ee ewe ee eee eee —rrMmITyT Am «(UAT A ATTIC UAlCMNAAIT OSD TICmnAn cpr enTiroina rs

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POPULAR iant Chest Expander and Progressive Exerciser Send NoMoney Be a muscular marvel. muscles of a superman. strong for your health’'s sa astound your friends with e\traor- dinary feats which only men of giant strength can do. In a few short weeks you will easily do stunts which now seem dificult—then real muscles and strength will be your and yours to keep. If you want exer- cise to just keep in good shape you can reduce the Strength of the Progres- sive l-xerciser by eliminat- as many cables as you wish, if u want great resistance so as to build up big solid muscles then use the full strength. How the Giant Chest Expander and Progressive Exerciser Is Made Have the Become eorto The Giant Chest Expander and Pro- gressive Exerciser is ade -w ow liv springy rubber e as to giv t long wearing and great sisting le ities Do not pay re for an exere * that has forty or less er strands en able Get the best and at d abl The Giant Pro- gressive Exerciser has SO strands of t finest rubber procurable to each i encuet rth d ‘ today es is withdrawn Your Guarantee The Giant Chest atre won de rful « Expander is a will say it in the finest you ever saw or your 5 Cables or double 10 Cables for strength for The d ble $D wn ieng § has resista of over 200 ibe How to Order—Send No ae Sign your name and address tc and get y Giant Exe a esent | rod yt t | T pr s scles and astrengt at th i pos at D pay f os the st y r Us , w PROGRESSIVE EXERCISER CO., | 4012 Langdon Bidg., . Broadway and Duane Street, New York Pl » cond Your 10 cable Progressive ’ _——s Your 5 cable Exerciser | Check the Exerciser you want. and it will be sent you by ret mail | Pr ‘ " trod ry price piue few ents etage on & va t i tha fy are not entirely eatiefied wit your exerciwer you | " wi a } days and est 5 ant y back r] PN iccccvoneuescénaseena . ’ ' UCC. wccccccccccccsccccsecs ' | City State + you live outside t Tnited States, send cash w order | -———8ce ee eee eo eo a oo oe ee oe oe oe oe oe oe § MECHANICS ADVERTISING SECTION New Book on Voice Sent FREE—N? Obtieation to Buy! NO MONEY DOWN if you act quick!—we will send you, post- paid for 30 days free reading—new Voice 300k - Spe pe | startling FACTS that may save undreds of dollars to every man or woman seeking a + rich voice Fo or speaking. REVEL ATIO sent for 30 “_S FREE Sealing. Then, if you keep it send Ret $1.00. Otherwise, just re- turn it—tha’ PROF. E. FEUCHTINGER Dept.13-5 Suite 29, 1810 Wiison Ave.. Chideze in ia ~IN 90 DAYS! - Play anything jazz to classical! Even if ~ i u know nothing about piano mu we a! f il have yx ir fingers dancing over the @)) \ jkeyboard with confidence in 90 daye If you can abu m or whistle a tune you can play it! My stude nts are broadcastir . MAKE ME PROVE IT; notes! Without ay to bring out your musical jr retina t. Ne wm ane original system does wa work. YOU WANT F THE PROOF! I'll send it. Write me now. D. M. SUTTLE, Director ILLINOIS SCHOOL OF muUSIC 1801 Byron, Dept.715, Chicago, I!) sH0 you -.. sual or at gid in spare time. ‘Enor- Sa demand. Big future. Inter- esting work. Oldest, foremost school. eto B.C nd today for free information samples and guarantee. EARN qe TO $200 WEEKLY ‘ets $25 for single show card. «Barned $200 while taking course.’’ ohn Vassos, says: DETROIT SCHOOL OF LETTERING 154 Stimson Ave, Est. 1899 Detroit, Mich, ILLINOIS COLLEGE of PHOTOGRAPHY Prepares you in from 6 to 8 months to earn $200 to $500 an a photographer or photo-engraver. Thorough pr: ctical tr Expenses low. Constant demand for our graduate 3 Enrollimmediately. we catalog. Box 4128, Effingham, iinois. Qc NEW SCIENTIFIC WONDER “sy i for _ te BOYS * thru Stone, any object Bones in Flesh, FREE—PKG. RADIO BIG FUN PICTURE FILMS. Takes pictures out camera ou'il like ‘em.”’ MARVEL MFG. CO. 1 oe. with each 25c order. Dept. 31 NEW HAVEN, ZIP-ZIP SHOOTER HOUSANDS of boys are 1 happy with this wonderful Z shooter, something every boy ¥ and never gets tired of. Z shooter is scientifically and pract if you like hunting and out- sports, get a Zip-Zip shooter with plenty of pep and force. If your 2. dealer bh pees m roer from CONN. made: door or oe tor $1. 00: AUTOMATIC RUBBER. Cc O., send stamps, ‘Dept. B. BR, COLUMBIA, S. ‘

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ELECTRICITY, AUTOS, AVIATION now pay hundreds of trained men up to $200 A WEEK. Here are THE 3 WORLD'S GREATEST BUSI- 3. BILLION ——— millions, but BIJL- LIONS of dollars are s t in them every year. c “HOOSE ONE OF TH SE THREE, HERE and NO Biggest Bus- noerter, used by students inesses for testing Learn in Only 3 Months in GREAT GREER SHOPS ON LARGE LIVE EQUIPMENT NOT A CORRESPONDENCE full of HARD THEORY- -s E.On en mart any Gay aay PRAC NICAL SHOPS GREER eve Itis PRACTICAL, EASY, QUICK, IN a learn to DO BY iG tr wining. You learn on Great, running, Dorn You learn to fly by emendous GREER. SHOPS. AUTO b tra EST BUSINESS in the world. ELEC- FASTEST GROWING. and yet in ite Infancy. t ioasteestes, alluring business today, is You Get Real aie te Dollar Industry f these 3-wonderful professions today © needed by sosren, fo Uecitions op Os 9006 BIG JOBS ! up. Fiad out now, about my great Shops TWELVE PEOPLE are in my t.- BM- ‘ ee Woe eo one - You NEED It, ‘Coth BEFORE. sud APTER Quickest, Easiest of Ways to = G:dusion. Expert Get My FREE BOOK \Y YOUR FARE HERE pare of extra cost, JOB WHILE LEA ARNING. Theal not NOW t BIG PAY JOB bu ut VAL hel You ¥ 1g aa Old, pee ted and ueated, Don't let money hold you ip eda IE xperienced | fo ana REER Sitors back Get ay ree Book. teal ng I- Find PA WATING and VALUABLE. YOUR FARE HERE. tet YOU Coupon below brings details. ATTEND EIT doy y= He 4} - EVENING: i helr fine Not Corre. DAY or EVENING WORK to da PAY YOUR EXPENSES while lear n iy v spon ence he'p » fied the real BIG Course JOB. LEARN how I get ready Employe YOU, and GLADLY. _Here at GREER SHOPS learn on BIG, ACTUAL IAF Machinery, what you are worth. Above is the important j|history of GREER COL- LEGE. Note the steady 26-vyears growth, thru genuine SERVICE, from the tiny Shops on the left to the tre- mendous Building on the right, filled with GREAT TRAINING Equipment. These COLLEGE Electricity—Autos— or DISAPPOINTMEN for pow HOLD the JOB it wor ik i truly ITY. If you can't hold the £100 a week » ob * . , A PREPARE. Be ready. Don't invite dis- viation a »ypointment Learn about GREER Dept. 901 SHOPS. Right now if you act quick, i can make you a most unusual short time offer. Clip coupon NOW 2024 Se. Wabash Ave. POPULAR MECHANICS ADVERTISING SECTION 10 $15,000 a year for GREER GRADUATES I will belp you get a position while learning also after eradua’ tion. Never be fe re euch w Opportunitie ET MY FREE OK NOW , EARN ABOU T THE BIG P ELEC TRIC. Al AVIATIC ad WORT D's BU SINESS 1 ® why GREER College selecte 4 these 26 Years: ‘Tremendous Success Get My Big Offer Now! Would an offer of $100 a week be OPPORTUNITY T ? If you covld be OPPORTU N- and — out. Address me personally CHICAGO, ILL. Erwin Green, President Address 59 GREER trained men are NEEDED. I] HAVE MADE hundreds of $10,000 A YE ik MEN. 90.000 in the last 26 years have come to GREER THOUSANDS MORE in the future will likely come here BE ONE OF THEM, Send coupon to me for openings. MEN WANTED elds and ONLY THE Learn to Boss the Job ~ 90,000 Students moves to always greater aq larters mean Gho WTH—PROGRE. Te | ERV- ICE. What is it y a like—ELEC- TRICITY AUTOS—or _ fasci- nating AVIATION? GREER vw me in you in EITHER, ns Yo SHOL LD BE ERWIN TRAINED, GREER, President Dept. 901 2024 So. [Wabash Chicago. iitinots Send Free Book indicated below and details of Spe cial offer, without oblicati« m to me ] }] Elec- Avia- L_j Autos J tricity LJ tion

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60 POPULAR MECHANICS ADVERTISING SECTION GEORGE F. JOWETT, Champion of Champions ad | * . will give you oe muscles like mine” [ witt make you a TWO-FISTED FIGHTING MAN with nerves f steel and muscles like iron. I will send the good red blood uursing through your veins like the onrush of electricity. In 90 days I will build you a new body that every man will nvy and make you feel like a lion, ready to tackle anything. I Was Once a Weakling I built my own body and I can build yours. My methods are ndorsed by HERMAN GorRNER, the strongest man in the world; {UR DANDURAND, the Canadian Sandow; HENry STEIN- Jim Lonpos, the Greek god; and ArtHur Gay, winner of the first prize in America’s Most Perfect Man Contest. My lessons are physiologically and scientifically correct. They ild without strain. They build from the inside out. They t new life and vitality into your internal organs as well as in your biceps. You’ll be strong, but you won’t be muscle bound—as pliant as a whip and as strong as a steel trap. Pair of Dumbbells Free To every person who takes my course I will give a pair of the patented Jowett Progressive Disk Dumbbells. They cannot workn and mu building. Here’s be equaled ior I I another point—my course is laid out personally for each pupil. Every week you receive a new set of exercises in order of rogression. You get Twelve Courses covering the Twelve Princ of Life and on conclusion of your course receive an em blem as a graduate of the Jowett Institute of Physical Culture I guarantee to build you over in 90 days or return every penny } c u have paid me. My easy payment plan provides a way for very eh en to be a Jowett I Get My Big Free Book i NERVES or STEEL All I ask is this: Send for my bi MUSCLES like IRON free book, ‘‘The ° ro of Bein Strong.’’ You'll get a real kick out of it because of the photographs and be- cause it shows how easily you, too, can have nerves of steel and muscles of iron. If you would like to lay your case before me in a personal letter, ] will give you a personal reply with- out cost et me show you how you can become as well built and as strong , , ca’s greatest. JOWETT INSTITUTE OF PHYSICAL CULTURE Dept. 4-M 422 Poplar Street, Scranton, Pa. Dear Mr. Jowett Without cost or obl t e d me a copy of your illustrated booklet, “The Thrill of ‘Being Strong.”’ Name — SS — Address ce cra anaes a Sn RD AD MND SED aD aD GED cD dene eee em eNO eel BF A RAILWAY | 76.1 RAFFIC INSPECTOR “—__ PAYS UP TO $250 ~\ per month ~ SALARY plus expenses 7 - If you are a norma! 4 man over 19 No You can earr _ ; $250 per m ets with expense Hunting the fascinat crowded pr for a Position “~ Railway Traf tion You'll be out in after away from dingy onous desk, mee seeing new place Completing practically your ow: dressed in good clothe your Training ii only to high railwa Promotions are rapid- Read what R. is a big se : pu 4 are t H. Kruger We'll train you for Trafix says: ‘‘ Hav- Inspection and upon com- ng complet ec pletion assist you to a po- nr me. em sition at a definite salary a or refund your tuition in Traffic There's no gamble ’ Inspection, I ing—no hunting for a Inspectors start after find that it is very interest ing work; also it is one of the most interesting studies of today. The work is ver; fascinating, and I would be glad to advise anyone wish- ing to take up = course s it is sure wonderful work, with a splendid future.” Standard Business Training Institute, Div. 2, Butfalo, N.Y. Theres Quicker, Bigger MONEY for YOU-in spare t $165 No Matter Where You Live—You Can Make $1000 to $5000 a Year—EXTRA! A Big money-making opport is waiting for YOU right N¢‘ in your own back yard! ‘I sands of my students are ca in BIG, the way you can—i or full time. Start with a flock—emall investment make a good profit. Eggs oultry meat are in big den Rich prices I'll PROVE t can put YOU among the big ey-makers QUICK! FREE Book Shows Way to Spare Time or Full Time YOU Can Cash-in BIG No matter where you live Success and BIG Profits city, town or country or Mail coupon below TODAY what youdo now,my proved _tor my Big NEW FREI ben ake Gane. alee on Book, “ How to he nef ot ~ oe ad for Profit.”" My fort aa You'll t Ww experience are yours. The $ $5000 a y “| Poultry Industry ra UP gimt-g- A 4 y heeds YOU. You need - “io nage: lle = in Ii ef r the G ev ‘ me sands of other an for 8 ° 1 ! ~ ' | National Poultry Institute, Dept. 411-D, a ~ | Washington, D. C., Att'n: Harry M. Lamon, Pres. | Dear Mr. Lamon: Send me your FREE Book, “Howt | Poudary for Profit.” 1 want to know more about y ! | tunity to make $1000 to $5000 a year, spare or full time | ' Name | | Address | ' _

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POPULAR MECHANICS ADVERTISING SECTION 61 UIT WOUANUDVUANDATANUUEVAEDNU NAD EDNUONU ONDA ENDED UNE AN 250 onth ss ARY ; ‘,,) This Genuine penses DW Soe ormal .- youd gu | as high as nth salar S paid, in ting, ur fession of fic Insp Can you copy it? Try it. How you copy it may give —— _ of what kindof adrafts- beoy er . man you wou you are 16 years old or mn hen. ; Get this older and will mail me yoursketch at once. Iwill a : Dor. : Rule for send you free, and prepaid, adraftsman’s Pocket our futur copyin rule just like the one shown here. T raffic yt g This will go to you entirely with my compliments. n com. © & po- salary, uition this Jack I will send you also my Pay-Raising Plan and Successful Draftsmanship. Don’t wait. Copy s etch now, mailto me, Draftsmen Needed in all These Industries—Get A Job In me oat Auto Work “ Electricity P Aviation Motor Bus Work Building Work . The automobile lectricity is the com! viation | tin ite ine Motor bus buildi t sb profes Jvorine Rule dustry is one of the potire foree of the world” fancy. It It A toes. gecterbun pa. ©, bonding Wo struc. soon, ae 3 Free. ~Jack ftamen are needed fo ormous propor. beve become leading ture can be erected eatest Frousands of drafts. pee | 'y deparment of th eg “rat men are world ee yithout plans drewn ‘ascinating ory k. aa nt essential t it I'l) train dreda of drafts b raft ma KLET wale you for the x = a bome. you Fou guick at. home for —> = ork 7 2S yeu an arenl- - @ job tion. show you the tectural draftsman. FREE—My Pay-Raising Plan Write to me. I will send you this new book. Not by me, makes $475 a month. L.V. Broughten, acatalog... My Pay Raising Plan and Money _ trained by me, makes$300a month. ..I can give Making Advice. I — = rove cnet ie Se Savadge, you many more names of Dobe trained drafts- rain: ed by me, makes $00 amon 1 Due men who are making big salaries. They wrote 5 tr pree, trained by me, refused $600 a te to me just as I am asking you to write. They cau: * he makes more in his own business. A. H. asked for my Free Book. They saw that oppor- Bernier, trained_by me earns $7000 to $9000 a tunities in all the great industries were tremen- ayear. Arthur Dewalt, trained by me, makes _ dous for draftsmen. Through drafting you can more than $400a month. D.C. Stroop, trained _—_ get into almost any industry you want. These Money-Making Age or Lack of Education No Drawback Tools Furnished t Me! You do not need previous experience. You do not need to be a high school graduate. My practical, home study Y u GET THESE FINE UALITY, course gives you just the kind of training you need to be- Y Ne IMPORT RAFTS- come successful. Your spare time is all that is necessary. {AN OOLS, rst a soon as you Earn While You Learn . Ba, 0 finer tools can be You can start earning extra money a few weeks after be- e for practical drafting work. ry my training. I give you special work and tell you 1 Train You at Home, New, ow to make :~ , Quick, Sure mployment Service wey After training al - > _* you to get a job without charging you ‘0! a cent for t thie service. Empioyers of draftsmen come to me for men because they know men I train make ¢ Money Back If Not Satisfied What could be fairer than that? I don’t ask you to take any chance. 1 train you under a positive Money Back Agreement. if my train- ing does not satisfy you get every penny Mail Sketch—Get Free Rule My practical working method makes y step in learning drafting, as rasa moving picture. That’s yi train you so fast to be a draft sman. } tarted now. Get into a_ better position, D g 8 good straight salary the year around. M Engineer Dobe Of t.scn ail this coupon. + 5 ' ENGINEER DOBE : 1951 Lawrence Ave., Div. 13-59 Chicago : Here’s the sketch. Send me free rule; also send me free of al! cost books “‘Successful 4~———7—~ & and my “‘Pay-Raising Plan’’—how > to earn money while learning and proof of big money paying positions. a ve te t for a Aad, pst ‘you. s FEE DT eR a “Ss costo! Draftsmanship"’ and} hay Fay Kale ing Pi ame ’ ber vraftemen are peoted a oeerene at’s the ind of profes- & s get into. f EEE TEED LIT OEP a ' an sansvine Denes

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62 POPULAR MECHANICS ADVERTISING SECTION The © CAR aN F ; Model Airplanes a ed Set No. 1 —— - GA / Only ¥ os, ‘ ; ‘* = $1 50 i rae r All / & v ¥ se 6 ¢ Aluminum — Complete a san /Construction 3 BOYS — at last, here js a genuine aluminum model air t ‘ Ily flies. And at a small price I r »oplane—Set No, 1—is a copy of the famous Spirit of 8. | Ww ad 18 ir es, fuselage 12 inches, powerful 1 © prox r i dise w s. Weight complete only at x I 5 model pla that¢ “ . 7 mak i “ a lot of ne I fit is d on cardboard w and f © nest Pliers only tool nece r 4 t bolte ts, wheels, ng sad {fuselage covering materia $i paid (3 for $4.00 Great fun, learn how to make and fly airplanes. Order Jobbe rs, = alers and schools write for jor discounts, THE 7 MOUNT CARMEL FREE Employment Service! MEG.CO. There are more calls for ‘‘National-Trained-Elec- trical-Men” than we can supply. Jobs are open now Dept. M paying $50 and up a week —but you must first get the right training. Get it at National—a world- famous institution with a quarter century record of success in training big pay men. All These Advantages: ; ; Unlimited Training Until Competent. —s 32 hea Free Employment and Welfare Service. a —_— Million Dollar Training Shops. Personal, Individual Training Guaranteed. You actually perform work that employ- ers pay big money for. 6. Official Diploma _—— al and certified rec- iii ord of work per- formed. HH £ fects vity- i 7 es +e" : _ ; your || Opportunity! | Ream \ ~ Mount Carmel, Conn, Se wh : ARITOON Send $1.00 for Laugh Producing Program of k ings with Instructions. Catalog of Chalk Talk = on bree BALDA ART SEKVICE, Dept. 1, Oshkosh, \ Play Piano By Ear Play popular song hits perfect ly Hum the tune, play it by ear teacher--seif-instruction. No te ous ding-dong daily practice-.just 20 brief, entertaining lessons, easily mastered. At Home in Your Spare Time i for J R EE ft t tors. | FREE! Read how — in- } and” 1] sures your s Send trick i ds , This Big, Free | for this free ‘E “pahewe$ al cat- nr ed , Hi] alog—illustrated by actual ‘ Book agent ov | photos of students training Ent at Piano’ How to Quickly | under instructors on a half is PAY | million dollars’ worth of new Niagara School of Music Make BI 1 electrical equipment Mail Dept. 300, Niagara Falls, N.Y i} coupon now, ANH 3 Throw Your VOICE f Into a trunk, under the bed cr anywhere. Lots of Fun fooling the Teacher, Policeman or Friends. Barrels of Fun. THE VENTRILO _ alittle inetrument, fits in e mouth out of sight. use.! with above for Bird > — etc. Sent with full inatr uc otk es us NEVER See Py 32 ‘PAGE BOOK on VENTRILOQUISM. rmula for Secret Writing, 12 Money Making Se rets and the marvelous NOVELTY X-RAY WONDER With it you can apparently see the bones fr Dept. 525, 4006 Figueroa St., Los Angeles, California. Send me your big free illustrated catalog of Electrical Op- portunities l Electrical School r | | Cha cc se ec cee eee ee ee es me ee ee ee oe co Name TEEETETLUTLEUEPEUUETEETTT TTT TTT ° lote of fun’ with Also 10 Big. Mp Address | ee with every d re ee ee ee ee ee the above Novelt 10¢c Age coated Case aneeed hon eer | by prepaid mail f Ventrilo Company, Dept. 609, Norwalk Com LARGEST and OLDEST Mail Order House in Connect —

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POPULAR MECHANICS ADVERTISING SECTION 63 | Will Train You | (4 at Home to Fill a Big-Pay| Radid Job |_ Onstruction odel airpla {8 If you are earning a penny less than $50 a week, send ~ e BPep for my book of information on the opportunities in ot of fun f Radio. It’s FREE. Clip the coupon NOW. A flood » plainly of gold is pouring into Radio creating hundreds of big c plet pay jobs. Why go along at $25, $30 or $45 a week y i when the good jobs in Radio pay $50, $75 and up to $250 a week? “Rich Rewards in Radio” gives full information on these big jobs ande xp slains how you can quickly learn Radio through my easy, practical h | | Hes res es the | study training Salaries of $So0 to $250 a Week PROO c Not Unusual The amazing growth of Radio has astounded the world. In a few short vears three hundred thousand rider ounts, ‘30f the 100 you By 3 jobs have been cre: ated And the biggest growth is | C@# build ) j still to come That's why salaries of $50 to $250 a - week are not unusual Radio simply hasn't got } | | Ware nearly the number of thoroughly trained men it needs, - \ a You Can Learn Quickly and Easily - Th in Spare Time Hundreds of N. R. I. trained men are today making $375 One big money holding down big jobs —iIn the Radio te Id, Month in You, too, should get into Radio You can stay home, ; hold your job, and learn in your spare time. Lack of ——— Spare Time high school education or Radio experience are no drawe backs. tly I made ne mont! Many Earn $15, $20, $30 Weekly corcisinn On the Side While Learning Radio Sets.” I teach you to begin making money shortly after you enroll. My new practical method makes this possible omy Larle Cummings ee hkosh, \ mings, | | give you SIX BIG OUTFITS of Radio parts and . 18 Webster St., teach you to build practically every type of receiving ny Haverhill, Mass. set known M. E. Sullivan, 412—73rd St., Brooklyn, N. Y., writes, “I made $7 20 while studying.” G. W ar Page, 1807—21st Ave., S., Nashville, Tenn., “ I picked oe up $935 it 1 my spare time while stud lying t.. ~~ Your Money Back If Not Satisfied 0 G FF My course fits you for all lines—manufacturing, " > selling, servicing sets, in business for yourself, operating ‘ime on board ship or in a broadcasting station—and many a others. I back up my training with a signed agree a men* to refund every penny ol your money il, after cor pletion you are not satisfied with the lessons and ir P uM h structions I give you. 450a ont sic Act NOW—64-Page Book is FREE Y n ee I Send for this big book of ridhse, Find out quick re tit Radio information. It has put k | ind = best hundreds of fellows on the road about this — ped Radio to bigger pay and success. Get the South- it See what Radio offers you, j 10¢ iso oner and how my Employment De- I pe partment helps you get into F} I I un Radio after you graduate. Clip t $450 a or tear out the coupon and mail { it RIGHT NOW = Frank M. Jones, J. E. SMITH, Presideat, Dept. 44H _E. Smith, President. ao. 44H, National Radio Institute, Washington, D. ¢ Dear Mr. Smith: Send me your Free book Rich Rewards in Radio” giving information on the big-money opportunities in Radio and your practical method of teaching with six Radio Outfits I understand this places me under no obligation 1G —— + | National Radio Institute ngelo, Tex. Washington, D. C. Name Age NDER Address er City State th g Occupation = 10¢ ik, Conn. ticut DOPTITAD MEROEBWANMICG AanrwrRrnmrarean aqmancecaas

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Be LARGEST and OLDEST Mail Order House in Connect'«v't | 64 POPULAR MECHANICS ADVERTISING SECTION Look What These Cooke Trained Men are Earning Makes $700 in 24 Days in Radio “Thanks to your interest- ing ( ourse I made over $700 in 24 days in Radio. Of course, thisis a little above the average but I run from $10 to $40 clear profit every day; you can see what your training has done for me.’’ FRED G. McNABB, 848 Spring St., Atlanta,Ga. $70 to$80 a Week for Jacquot *‘Now I am specializing in autoelectricity and battery work and make from $70 to $80a week and am just getting started. I don’t be- ieve there is another school in the world — ex — Your les- 60D8 are a to stody. RO BERT J IAG QUO 2005 W. Colorado Av Colorado oon Colo. $20 a Day for Schreck *‘Use my name asa refer- ence and depend on me as a booster. The biggest thing ever did was answer your advertisement. I am aver- aging better than $500 a month from my own busi- ness now. I used to make $18 a week.”’ A. SCHRECK, Phoenix, Ariz. $3500 A Year For Beckett **When I began with youl was just a common laborer, going from one job to another, working for any- thingI could get, and that wasn’t much. Now my sal- ary is $3,500 a year and the Company furnishes me with an automobile.’’ C. O. BECKETT, 108 Maple Heights, New Lexington, Ohio no extlag SF - RSX WKB e is the Big PayMan pow WPA NWT aA YM AOmyeraarrccac ot tfits ay T Will Train ¥ at Home to fill Job! It’s a shame for you to earn $15 or $20 or $30 a week, when in the same six days as an Electrical Expert you could make $70 to $200 ~and do it easier—not work half so hard. Why then remain in the small-pay game, in a line of work that offers no chance, no big promotion, no big income? Fit yourself for a real job in the great electrical industry. Big: I'll show you how. Today even the ordinary Electrician —the “screw driver” kind—is mak- ing money—big money. But it’s the trained man—the man who knows the whys and wherefores of Electri- city—the Electrical tye ho is picked out to‘ * the ordinary Electricians—to wed the Big Jobs— the jobs that pay $3,500 to $10,000 a ‘Year, ,Get in line for oneof these* ‘Big Jobs.”” Start by enrolling now for my easily learned,quickly grasped, right- up-to-the-minute, Spare-Time Home- Study Course in Practical Electricity. Age or Lack of Experience No Drawback You don’t have to be a College Man; you don’t have to be a High School Graduate. As Chief Engineer of the Chicago Engineering Works, I know exactly the kind of training you need and I will give you that training. My Course in Electricity is simple, thor- ough and complete and offers every man, regardless of age, education or previous experience, the chance to become, in a very) Short time, an “Electrical Expert,” able to make from $70 to $200 a week. No ExtraChargefor Electrical Working Outfit With me, you do practical work—at home. You start right in after your first few lessons to work at your pro- fession inthe regular way and make extra money in your spare time. For this you need tools, and I give them to you—5 big complete working outfits, with tools, measuring instruments and a real elec- tric motor. ATTA TT eMy Trey ase MAIL COUPON FOR MY FREE BOOK L. L. COOKE Chief Engineer Be an Electrical Expert Earn $3,500 to $10,0C0 a Year Your Satisfaction Guaranteed So sure amI that you can learn Elec. tricity—so sure am [I that after st with me, you, too, can get into tt money’’ class in Electrical work thatI w guarantee under bond to return ev: wed aid me in tuition, if, ke en 3 inigshed my Course, you are not was the best investment >: uevern back of me in my Ss arante¢ cago Engineering Works, Inc. ,at dollar institution, thus assuring to ev dent e nrolle ~ not only a wonderful tr in Electricity, but an unsurpassed § Service as we ell. Get Started Now — MailCoupon I want to send you my Electrical I and Proof Lessons, both Free. Thes« nothing and you'll enjoy them. M start today for a bright future in Ek Send in Coupon—NOW. L. L. COOKE, Chief Instruction Engineer L. L. COOKE SCHOOL OF ELECTRICITY Dept. 2150 Lawrence — Av.Chicago L. L. COOKE, The Maa Dept. 19 Who Makes 2150 Lawrence “‘Big-Pay Ave., Chicago Meo Send me at once without tion your big illustrated t complete details of your Hor Course in Electricity, inclu outfit and employment serv I nent ensinnvtntcnzcceensnnncccenamocian orn rT AT | |

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POPULAR MECHANICS ADVERTISING SECTION 65 Claesih ed “Advertisements WORLDS BEST WANT AD MEDIUM

vertisements in this sectio 30 ce r r n, 0 nts per w T um words, able in advance ro be in ; He ord, each insertion, minim 0 ds, payab d € serted der proper classification in January issue, copy should be in our A, ‘ sh { our offce November ‘ P 1 9th

ADVERTIS sau “TRAN! W Ne SAVE Money on auto and truck repai ane LANK a : OF F _ Advertising Gears, axles, bearings, motor and tr — USED Motorcycles, all makes. | cane sake St., Chicago, Il. sion parts at 50 to 75% off fact a - prices; price list free: used Bo bs owest 1 1897), Chicago's most progres- prices. Satisfactory parts guaranteed. P ot and less. Rochester Harley David gh omg will mail free on request their | Service. | Price lists free es rompt | 129 West Main St., Re re nano re Advertiser I c 719 ° ree Century Parts — St., Rochester, N. Y i ge AC iser’s tate Book, with L0., 1712 Lafayette Ave., St. Louis, Mo ; BARGAINS in used — us I es map in colors. Gives com- RADIATORS At wholes: —~- ill makes. N |} used motorcycle parts for I ition of best p » new . olesale prices All No Catalogs. J. B. Dahl, 36 as i ee ee standard makes Satisfactio , “ Archer Ave., Chicago, 11 Deni, 3068 " . es n the United States and Send for prices, statin n guaranteed. RICYCLES. 7; * _ ( Our copy department has seasoned Independent R di 1g make and model. Pia + ha — , andems, reducing, training n give on advertising and selling piggy onl adiator Co., 1119 S. Wabash | Store, 175 Ww oF gy Lakewell Bicycle ‘ie 2 A . g . ‘ ake, Chicago : _ TOOL Salesmen and " ~ {DVERTISE In 24 Big Sunday New 4 saresmen and mechanics witk ~ : ig Sunday News- sales ability se ; a some papers, 24 wor ie $15 ;.00. Excellent for secur- ome ee ee pad electrical tools to AVIATION » = smen _and business oppor- and very Liberal commissi ges. Easy sales, NEW Book “Making G a 1.000 leading | cialty Co. Girard, Pa. Homer Gee | tis see tow to Ge temneal te scone weeklies, ma order magazines OAT 4 ard, ra * FF se o fit yourself for marve S . ; é . TON ; 5 - 7 oppor 2g elous Eve f Free. Wade Advertising, Bal- R. ONOMIZER Saves gasoline Guaran- YY ot a 8 open to flyers and mechanics | » te Chicane send. Write Economizer Manufacturing on ~~ —, stirring story of Col. Lindbergh as ' . ; me, Ga S Wire / chief air mail lo 7; ° . we FORE Advertising get our catalogue. ~ 42 MIL E 7 of “Bud” Guenes tr ~ = anstructor. lise No ree 25 years in business. The e S On T gallon” WonderfuT mots- pilot Published t n barnstormer to chief la issified agency in the world. — gas saver All autos 1 free. Critch- ames ak ie - ny well known Robertson i icon yy Agency, 20 W. Jackson w, L1-805, Wheaton, IIL. of gradu ate 9 jy “ id alin hundreds J ( go " . od 1 accidents Arn w 1998 A 7 — AUTOM system of fiyi aug gee ae hool ri New 1928 Advertisers Rate Guide TIME Count OBILES pilots. G cin — by active afr mail page Includes everything Lowest Piha a ; as in applying for patents. See training ship uner a licensed and inspected es. E. H. Brown Advertising Agency, | Regi tered P 155, Clarence A. O'Brien, | charges ge bond, no breakage S. Dearborn, Chicago D °C ered Patent Attorney, Washington Robin’ fact kero ‘field Ryan’’ and s And Counts In applying for patents. See an Imick, Box M1283, Troy, Ohig aren - ie ene avigation, design, und 155. Clarence A. O'Brien, *RICES Reduced’ — e_ ’ ' ) other fascinating sul 1 — ‘ t : e Order b: : Endorsed by exper - ibject ates i Patent Attorney, Washington, charger now at these low pri Ms eters enployu toy — vag Diploma given. Free ng ( — Chargers with capacitie f from 1 to free Natios + _ J mple details sent t yatteries se nan + : a i n ne FOR ADVERTISERS Send a a 4 om at fre . $9.50 to $62.50. 19 10 1 So. Broadway, Los Anesie be RTISE—z8 Words in 20? rural Sarr, Columbus Ohio. g. It’s free. Adams- AVI STORS. Pilots mect si = rs $10: : ~ bane 2 salesme - ‘ iggers, nL. 5 ite tee, ere See, YOU Are wanted to resilver mi ie capes i : a 4 ay weesers Ceemee. We 00 ston ton” Semmens iin silver mirrors at = pe ng and need men and we oe _ ADVE RTISE RS Wanual. 1929 edition. tableware oy ey platir g autoparts, going ‘o train them ourselve Or Bn — Owl, Ti : “ano Spri , rite for informatio to earn while you 1 muity wl, Times Bldg., New York. Sprinkle, Plater, 77, Mar I ation nee if ji , ear Wire or write at WORDS Insert 50 magaz s “=r - » Marion, Ind . if interested Varney Aircraf oh. ~ pecan - ) magazines $2 00. AVE Money—Garage equipment rec Peoria, Il ircraft Corp., eer gency, Shawano, Wis. tioned and guaranteed like new U on MODEL Airj \VERTISE In weekly papers. ~~ bargains in test sta : nusual page eta My irplane supplies Send dime ‘ | ribats Lists car washers, battery r propeller and pr lict or, Hartford Bldg., Chicago. ee air compressors, et Shipped nd c 1G] Roval h ic J. t. Model Airplane F ria easy tert c. pec 1 ul Ave, swthorne. N. } SALES PROMOTION cumaiene ea po hat = you need to STUDENTS, Send one d ; J ; —s nent ? > a 2 ' i f — nce LS oe — Daily Sales Developed tox M1284. Troy, Ohi 2. C. Galbreath, wings and card entitling you to free « -! - 28 years for clients “by ot ° —“hTinrtTrny sioaniaion service of the Acme A e counse! ago i oe ie ir direct BATTERY Aid pos Ts = - irmen. Acme Airways 8 copy, campaigns. One product, sion on batteries ny ae “ ral prevent corr I= 82 Proctor Bldg., Troy, N. Y _— ; n idea; this year $100,000 orders | ical Co., Milwauk Sample 25 Ai i Chem- FLYING Instruction book 7 Fifty year old conce . . =: am. aukee, Wis Complet se r one dollar concern desired 50 USED © — _ " ylete, simple, understandabh! representatives in 1925; we SED Constant potential outfit—120 am- by Clevenger, or f woes Written cnen comin Gib ea tet Coote oat eal kaon like new, | Send for “M tern Flight. ee at 2 d aa ian . ik Pw, : 4 de ight.’’ . 4 athe at $3 each, for another Ten ptr gas Ree repainted A wonderful bar- craft Company, Dept. PM1 Col wate “ts Air- Sales Promotion Manager Larkin Co. ng E. o~ on trial and allow plenty of Colo , ado Springs, ; a aoe problems for free diagnosis. | Ohjo. 2. M. Connor, Box M1282, Troy, TIME Counts in ap lying Ruf C. Johnson, 118A Woodbridge Ave - pages 154 and 15 ; Pees for patents. See ; FOR FORD OWNERS Registered Patent Att m . Wash a LET 7 rd. Cc SUS e 1ington, TON T TER SPECIALISTS AURORA Underslung parts and 3.1 racin SPEC 7 | \'T Experiment! Mailorde ms gears, speedster bodies, headligt - ed : CIAL \% rubber strand 7 r_ letters, , lies, headlights, hi com- airplane 1 for model ( campaigns selentifically written pression head. See Sport Factories ad irplanes—fresh stock—200 feet $1.00 post- awe P.. 000 satisfied clients. Long page 156 ; : ad. —, of ready to fly airplanes and onsultation free. Finkel-Ad ~~G2 MILES On T_ saat supplies 10 cents. The Clint Tov Cor * . -Ad- 2 MILES On T gallon. Wond moles Sort ie Clinton Toy Corp., ia 131P Glenwood, Jersey City, N. J ture gas saver All aut ~ l eggs fe Ser os North Haven, Conn iso BUSINESS ADDRESSES low, L2-805, Wheaton, II ree. ritch- eH .. _— let and blue prints on kes IN 7 heart of New + oh wl ~ sportplane. Contains also ay” Aiveus aa x. a _York New York MOTORCYCLES. BICYCLES AND flight instruction, motors to use. et mr . ¢ cpm 7 4 - + forwarded daily, SUPPLIES woe he ar. Rent or buy a rib mold red ~~ Sdward Armour, M-1, 136 make ribs Free literat .o~ © th stake , , MOTORCYCLES Che ( : © iiterature Russell Aero > = aper than bicveles », Stadium Pl. Ft. Wayne, It BUSINESS $25 to Easy terms. Tires ; an eet AVIATION Rooklet . Ind SORIVE a SERVICE seems $2: Forks $3: Tanks $5: Wheels ne. Xelphin , bookie sent i aoe ’ . Mail from mailorder houses | Coaias Saddles $5: Handl we +42 eenee m0e 4 net ~ ail Ouse add : andle malt * 4 STEE - . - om wome listed 20c. Larson, — $15; Motorcycle Tires. $: Png ei N os —, 7 : a ete correctly! Read Air ve., Chicago ires $7: Airplane En os uc Navigation sf eteorology by Capt. Rict g ngines $15: Bicvele ard =Dunean $3.50 tnai : mich AUTOMOBILE SUPPLIES Tires $1.25. Send 50c for catalog. Price | Marr, Distributor _postpald. Write to T OP Dreseiaa i. ; c utter Denincer Rochester, N. ¥ ° vort tor, 729 Greenwich St., New @) ty ait, Able anc elastic SEAS 4 — . L , , illon Instructions $1 Wil- le _ HING Price Reduction! Fine Har- DURATION Model airplane war Ve 8:0 Seminole Boulevard, St. Peters y-Davidson motorcycle bargains New 6" twin, $3.00 Sn ef eee . ard, § eters- used and rebuilt motorcycles, $50.00 and 4 2 Marx Ait . iy 6 L flyers. Catalog 0 Parts new and used. Lowest price a on nga — bargain bullet in fu t Salt Lake, Ut oy t, 668 East 8th South, t supplies on ces re Mress <nuth’s , “ ; — ne, aanene wheels, radiators, Agency, 2525 Fond du Lac eggs tent sm VARIOUS Sizes wood. reed ale . tag prators, gears, carburetors, Wis Exclusive w= Dari “seen rubber band hee DE asst 100, R - i “ complete $15. Brakelining 50% utors e Harley-Davidson Distrib- piesa tigger Bt : t : vel ; nion skin ‘trightman, 2065 Main S 7 ’ oF, ~sl ' —" sig Ne for t., Hartford, “MOTORCYCLES, a ene, five for $1.00. No stamp wil alse Knights. 1512 Locust, St. Louis, Mo 0 do set | cireular on free three foot 1 iel hove s, Mo. Shop, 3050 Hurlbut Ave., Detroit, Mi t

POPULAR MECHANICS ADVERTISING SECTION Lo

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66 ~ WARD H VV t K i- i t Ss \ r fiyi ri fa S WW , P ( Mo. T Bl ~ “i Vi ' Sa uae | fine Ss i f bi t al I 1A ( H - te Y SIMPLEX M ( \ Ma Se f lv t 9 Ol Lt K t | vt \ need Aircraft, 114 Oli y ri 1 - I Ame r pra I r to f tra l ( t than ar tor’ ‘ ! i ren ‘ ori 2 He h Air ( ( I BUl » And \ n la 2 foot wi Z vith 12 hp ot lrawi com- nlet I f I € Wa r ( 1 Ed Bldg Cincinnati Ohi BLILD O r eT lane Ad | 1ot De 1 ' » Hawle \ Box Ss Die Calif BUILD Y ri ete pla $7.50. Special pr ist I. P Sel M St Milwaukee Wis AIRPLAN I ‘ 28 t 200 hr Smith, Box 1 H Tex BLUEPRINTS 1 f signed es tl fl noplane $2 i $5 r 2 Allison Airpla ( Lawrence, Kans rhKO I s $ } zs $1 ¢ } } Aerodrive boat and sied ‘ $8 \ r’s he 1 re gor t oO rd Air ft 1309 » Chi ° THI s AV Me f A A t ng 4 Amer Sc fA I l Mi gan A ‘ I POPULAR ylinder

r $ rificed $7.50. Real airpl ] 8 foot 1 £g awa $5. \ rt ¢ Carle Place, N. Y BIGGEST, I Catal Model Airplane Pa S i Ideal Cor pany, 19 We 18th 8S t, New York FLY Wit t ! e B ! sour own ‘airplane at N t Bool with f how to build f a r Pr e doll Hod iB St Sprir 1, Ma IT’S New! I rpiane, 12s page 19 j tr ! ver ir . war to | vy a it fil Re } led by lead pi s and fi h 3 Sent Dost 1 for $1.00 or w for free de tive « Roth D Airw 2502 Ur t St. Paul M BOOKS AND PERIODICALS TH EDITION J ff pr "Rad Theory and Operating.’” by Mar Tex Loomi rhe st lard radio text and ref ence | k f \ \ rl 9 ' ver ) flex i F Pr $3.50 For sale by hundre of t r ! America and many forei oO be ret 1 Mrect { lisher Send check r ! I Publishir Cc par I g ton. D. ¢ BOOKS | iM 4 New nest Phi ini M N INDI Full Y $2.51 erty y Snon & Char erlair ‘120 P.M Street, New POPULAR MASTER Ke ) f z ratior iH i $2.7 in ‘ FREI I I f » bool Adare 8 & I St Yonkers, STRIAI 4 Wright book tions for ma fully illustrated Lib- MECHANICS HYPNOTISM Easily learned Les guaranteed Postpaid, $1.10 Smith Pu ( Le Springfield, Mass

PICTURES

AND POSTCARDS

ING 1 Oo La L P G Wiggle wi Sor t ew. On Tip Top 8S East De i Ma ~ CHRISTMAS Greeting rd he if l roa : | folder Mi nh t ‘ 1 $1.t ( T 1 Hoffman 7B i = \ N STIX” Mor mail—Ss M ne of rtunit 2 Lark ic 2 i \ Milwa Wi FREE B W | va t w Humorou and iteresting Kind ‘ ke. 10 snay card Red hot pocket t Copy Amer greatest illustrated n book All for 25 White Mule Be r Da Wi “ART Pictu 500 all different. Parti l H rd Sales Cx Dept. 15, Box 529, San Francise Calif

MAGIC TRICKS, BOOKS AND NOVELTIES JOKER

THE Book of 1,000 Wonders’’ will be sent postpaid for 1} Explains many mysti- f t with coins, card handkerchief et i I Al ‘ tai com] ri f trick ke puzzles, book ' iding act spirit listic ef- fi illusion A curios and imported nov- t f it y foreign land Large as- ‘ t west prices You will amaze and your friends! Send 1l0c today. Lyle DD Station A-5, Dallas, Tex ~~ MAGIC—1 3. For a is W 1 a n le ctior I f Acts i ritual Rope 7 i pro- f Cc S D Ill ae | \\ i ott: , ' ex i 4s r iL! SION And trick catale - I l ] ( N. J MAGIC I } method A ick every week P icular free: t k 10 I rst Magic (¢ R 208 18 Olive, St. I i M ~ SIX Mystif ard trick lone with ordi r I rd I il le l I larg ta WwW 1™M ( D A. Box 1 Stati Cc, i \ Calif LATEST Fr model i i set of tr parent art cards all for $1.00 WW is ( 336 Marcy Ave., Brook- FREI ith $2 rder die box Send 20 for r large catalogue of tricks, wigs, sen- t 1 «¢ ape Oaks Magical ¢ Jept 8 Oshh t Wi ELLECTRI¢ I Sever nt ) $1 ( rs Campbell, Calif SEVEN M il Delusior nd Gilt Mors Park, I NEW |} trick je: three for § Cat £ free Professional 1 I M Minneapoli Minn MAGICAL Trick puzzle novelti ( Matz N l Readir I’a

GAMES, ENTERTAINMENTS AND PLAYS

PLAYS M 1 re instr cor bl f it j gs lia recitatl iver and make-up R Cat né&c s W } 4 BLOCK-BALI t ed cl $2. «68 } Ohio FOLKS Nearl laughing playin llywood Burle hilar I game Society in convulsions $ t- ! | Hollywood Games, Box 690, San Jose, Calif. MECHANICS ADVERTISING

WwW ADVERTISING SECTION Christma game Series piease if ‘ u ; We s ‘ if ! r = { xo } Bostor M ROYAL Gift-hox yntal x rate ' " rtment for b Philateli Mi n 500 MIXED VU. 8 Weatherby, Lakewood, ECTION

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POPULAR ° t-OFF Countries only 10c. 1) rravancore, Jamanica, St. S Martinique, Ivory Coast, irg Peru, Newfoundland, elous packet 78 different stamps rent countries, including all re. Bargain price l0c. Big vals with each order. C. D. y, 6, Flatiron Bidg., Fort Angola, Pierre, Estho- South a “0 different s tamps rayne foreign and 60 including $1 and Free, with tells ‘‘How Properly,”” only 25¢. np yhlet which Stam Collection re ric e lists of albums, sup- ndre ds of bargains in sets, Queen City Stamp & Coin 604 Race St., Cincinnati, Ohio. tGH Air mail and 25 different only 15¢ to approval appli- bargair 100 British col- 1 Africa, 45¢; 100 French 1,000 different from all over All 4 packets for $1.50 L. 1439 East 7th St., Plainfield, — os 1) Airmail stamps, including in triangular stamp; Portu- Cross set and 10 different Cen- nian stamps Approvals and free ih order. Curhan Stamp Com- ter lass - packet loc. Select approvals. ( | Qler, 3275 46th St., Long Island, 10> d 19¢. different, Central t, beau- News, ~ Cataloging nearly page illustrated Stamp Company, si.D Stamps 95¢e Forty West Coast a All wi Fifi, Hebrides x rAMPS nial mais, rid containing good Papua, Australia, Solomon Malay = sorne et Many stamps $2. Big f t free $10 Vincent, Box 261, t Australia » State loc to $2 present 4 varieties catalog This amazing offer State size of “Tssues, value $1.25, for approval collection, coun- ed Leduc, Redlion, Penna. \R “Colombian Republic, Antio- » approval applicants Richard 005 Midvale Ave., Philadelphia, i AL CU Different stamps ($6.00 linge approval sheets; p sibum: perforation gauge; ale and ruler to approval ap- for nly 20 Edgewood Stamp G Milford, Conn 5 Different 10c, including tamp and 5 Newfoundland, to plicants Price lists of Canada, We list 250 countries in dime Specials: 500 different 25c; 1.000 75 2,000 different $2.50 Vic- Dept. 4, London, Can. Stamp collection from 20 different t 1 sending Se mailing cost for maut Stamp Co., Dept. 213, Canaan, Conn RIANGLE i Discount special ap- vith 109¢ packet containing triangle, ets, airplanes, early U. 8S. stamp, an stamps. Murray, \ Tower Bldg., St. Louis LEN‘ aT Colonies free “Tigers, Chiefs 2c postage Stamp ronto, Can DIFF 0 Grove er 100 Jungles, Empire Foreign postage 25x Napp. Beloit, Wi MIXED 30c; 100 ( rles Peugh, Elma, Wash = ORE IGN Stamps 3 cents. rth Branford. Conn. TENTION 1929 Price list of U. 8 ] price list of foreign stamps ete ever issued. Free on request. Var. precancels, Lufbery H t Dl ices paid for U. S. and foreign tamps and collections of medium a } grade. F. Marquis, 15 Park Row, rk City RST Flight air mail covers and 29 29 countries for 79c. To appli- for Approy als. Brooks, 19 Pleasant St., fass. MIXED Ife; 35 Different U. S. Ie. ~ Stamp 30 Athol St., Spring- MECHANICS ADVERTISING WORLD'S Greatest values: go, Airmails, Nigeria, 215 diff. Con- high value U. 8., 10 to approval applicants, 100 diff. U. 8. 30c, 1,000 hinges 9c. Lists Hawkeye Stamp Co., Cedar Rapids, 39, Iowa STAMPS—50 Different foreign stamps; illustrated album; stamp hinges: perfora- tion gauge; big illustrated catalog—send 10¢ for complete outfit. W. Betts, Clear- field, Pa SEND For postage stamps at- list” of tractively priced. E. T. Parker, Bethlehem, I >a. 100 WORLD-WIDE, Including British, French, Portugese colonies, and 10c cata- log value from approvals, only 10¢ to new customers Bell Co., Box 455, Washington, D. C. REGULAR 25c Packet, including Monk and Monkey, 10¢ to applicants for World- Wide approvals. Martin Huet, Box 245, Chicago ~~ PREMIUM To serious applicants for Brit- ish Colonials on approval. Thorndike, Box 472, Wesleyan Station, Middletown, Conn FREt—Hidden treasure packet to ap- proval applicants Roosevelt St., Far Rockaway, N Donner, Y v0 DIFFERENT Turkey > approvals Rubin Huffman, 405 Pennsylvania Ave., Brooklyn, N. Y “TZ SNAPS Washington, D. C., $1.00. © R. Rar 1001 Mirimar Drive, St. Peters- burg, Fila. ~ AIRMAIL—25 Different 25¢, 1.000 O.K- Hinges l0c, 3,000, 25¢ O. K. Stamp Co., Box 581, Utica, N. ¥ ~ 50 DIFFERENT U.S. postage Se to appli- cants for U. 8. and foreign ap als. 100 British colonies 25¢; 25 Guatemala 2% 1,000 hinges lOc, 3,000 25¢. Glendale St amp c ‘41 Linden, Glendale, Calif MAGNICAROCIOUS Packet foreign stamps, beauties from distant lands (Many richly colored, unusual designs), free for 2c. Gray Stamp Company, Toront Can “FREE 50 British Colonial if approvals requested Postage 4c terkeley Stamp Co., South Berkeley, Calf FREE, 12 Diff large showy picture stamps for a request for my popular ap- provals. Postage 2¢ Premiums with every purchase A. Rauer, Palmyra, N. J ~STAMPS—1> Different varieties free. Try our le specials Send 2c Wood Patterson Stamp Co P. O. Box 565, Pecos, Tex STAMPS On approval %ec up. Free pre- mium Herbert Keigwin, Middletown, N. Y “500 DIFFERENT 4c, 1,000 Diff 90 Anderson, Gouverneur, N. Y ~ “WASHINGTON Stamp News” tells about new United States stamps and first day covers Sample copy free A. M. Nickles, 213 Seaton, Washington, D. C FREE—Send for sample copy world’s most beautiful stamp magazine. Stamp Collector, Dept. P. 719 Lodi St., Syracuse, N. Y FREE Five fine Congo to approval appli- cants Bernard Karch, Bengies, Md ~ 500 WORLD Stamps. old and new. com- memoratives, 10c Arco Stamp Co., 3206 W. 95th. Cleveland, Ohio FREE 100 Diff. to approval applicants Postage 2c. C. BR. Tempe, 1310 Gaffey, San Pedro, Calif ~ MALAY States: 10° different 1% Lists free. Allion, Angola, Ind ~ 700 DIFFERENT Danzig i5c to approval applicants. Importer, Box 156, Needham, Mass. 1,000 UNITED States and foreig mixed 25e. Johnel, 3114 Seminary, Chi » Wm ** SE 25 Canada to approval ae ints Prall, Somerville, N. J “PREMIUM 25 U. 8S. only with approvals Refer. please. F. E. 10 No. West- ern Ave., Chicago, Il ~ 50 TNITED States, 15 Portuguese colonies, to approval applicants. North Halsted Gaerte, 47 1 50 foreign, 15 British for 10c and premi Theo. Nelson, Chicago, Tl. “THREE Complete sets for 10 cents Tos- nia 1917, Honduras 1865, Prussia 1993. S E. Saxe, 1427 No. 58th St., Philadelphia, Pa BIG Value! 25 airmails 10 Free! 100 stamps with 50% approvals. Webster Stamp, Co., Box 11, Tremont Station, New York LIBERIA Vieweards with Liberian post- age stamp cancelled at Monrovia, 12 diffe sent one dollar Stamp Company, Samonle 12. cent Plainfield, N Plainfield POPULAR MECHANICS ADVERTISING SECTION SECTION 67 ANNIV ERS ARY OFFER! 15c six beautiful sets ‘Occupati n Commemorative,”’ “Aire mail,” Cc nerity,* Pictorial,"” **War.’* Also three packets: (Internati nal), (Brit- ish) French, Portugese Colonies), (Bul- garia). Approvals, lists, discounts Deer- ing, Fairmount, Marlborough, Ma 200 DIFFERENT Stamps, with free pre- mium only 10 Skillman, Titusville, N. J. LINDBERGH Cuba airmail stamp unused only 10 Skillman, Titusville, N. J FREE--Choose rt Ail different 200 foreign, 50 France 15 Newfoundland 0 Switzerland, 10 Iceland 100 Austria, 25 airmail with Mekeel’s Stamp Weekly. Bev- erly, Mass., three ntl Remit 25¢ 150 GOOD Mixed foreign i > cents Stanton, Niantic, Conr UNITED STATES— Send on approval. Send me your want list Ref. please. M. Hanna, New Kensington, Pa 200 DIFFERENT Stamps. Zanzibar: Al- bum, l2c. Liberty, 3974 Arsenal, St. Louis, Mo. EXTRAORDINARY Packet! 60” different stamps from Nyasaland, Persia, Natal. Trans- vaal, Rhodesia Monteneg Nigeria etc Only Se! with excellent approva Viking Stamp Cx P. O. Box 18, Sheepshead Bay Station, Brooklyn, N. Y FREE! Loose leaf postage stamp album at rate of 8 pages each month given with subscription to monthly journal Send 2c stamp for prospectus United Stamp Co., Marquette Bidg., Chicago, Il] 100 BRITISH Colonials, all different, “in- cluding some of the ni varietic for 25 $ Approvals of the tter grade stamps for advanced and mediur ectors Also beginner's selection. Lists free Your name n our mailing list guarantees you satisfac- tion. Humber Stamp Co., 401 Quebee Ave., Toronto 9, Canada AMATEURS Attention! Low price a sets on approval, Wickham Stamp Co., caucus, ar LIBERIA Snake Triangle and two other triangles in our packet of 53 genuine foreign tamps for five cents Crowder Company, Waverly altimore, Md 50 DIFF. Soviet Russia 2 Approvals if you wish. Glenn R. Knight, Box Sau- ilito, Calif 10 DIFFERENT T? States 10 60% Seidenberg, Baroda, Mich ipprevals 109 DIFFERENT i Azerbaijan Zanzibar, etc, 10¢ to apr al »plicants Floyd Marsh, 524 Hamilt Ave Indian apolis, Ind 00 DIFFERENT, 20c; 600, 5 1,100 $1 2,000, $3.50. Fred Onker 630 79th St Brooklyn 00 STAMPS 17 1,000 Hinges 2 Ask shout special approval di int Elmer, 61 Court St., Boston 105 CHINA, Et 2X Album (500 illus trations) 3c. Bul lard, Sta. BB, Boston 10 DIFFERENT Stan many unused high values, free to collectors requesting our Net Approvals. Postage 2 cents. Christen sen, Milwaukee, Wis STAMPS, 100 all different Postage Lists free P. M. Quaker Stamp Co., Toledo. Ohio ~ REVENUES -Telegraphs—Every country Pretty—Intriguing—Cheap Mint $5,080 revenue free A applicants with references Vanderhoof 114 oa Denver, Col HIGH-CL is Ss proval References Re juired Pikes Peak Stamp Co., Colorado Springs, Colo 110 NEW Europe All Different, a won- ferful collection catalocuing several dollars, free to collectors re ting our Net Ap- provals Postage 2 cents Badger Stamp Co... Milwaukee, Wis BEST One cent approvals in P. Hand, 1117 So. 60th St., Pa America. ¥ Philadelphia, DANDY Mint stamps 2c to those request- ing approvals Harvey Teeple. Decatur, Ind 1,000 ALL Different stamps £1.00 New price list of all United States stamps free. Voorhees, 7 South Dearborn St., Chicago STAMPS sent on proval at 70% ‘ount Reference required Emory Renoil, janover. Va 505 DIFFERENT Stamps, cat. $14.00 for ce to those ree provals “O dif | ferentt Sweden |? ind 1.000 hinees 7 ( ‘o., 68 Hudson, different stamps n County Stamp J. 60

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68 POPULAR MECHANICS ADVERTISING SECTION

FREE G ny air mail (5 var.) for new OLD Coir urge Fall selling catalog of | GERMAN Cameras, lens¢ B applicant of my; l , and approval ins for sale free to collector nly Cata I Riba Wa Los Angele Calif and ! y nt Cha Ww log quotir price paid for coins, ten cent Schmid P. O.| Box 4832, Frankford Sta William Hesslein, 101A Tremont St., Bos- | MOTION PICTURES Philadelphia, Pa tor Ma FILMS—Five reel w TT — FREE! 115 Different st to approval | 20 ASSORTED Foreign it postpaid , in list Alton Fil applicant Zc 5 é Paige Stamp Co., | 2 Oddehon, Box 681, Kansas City, M | Creek, Kansas Ci M Oak Park, I —(ALIFORNIA Gold—Quarter size, 27; SWAP um Fil St STAMPS, 100 ¥ t af " srazil, $% size, 53c; 3e piece and catalog, 1 ree Stewart Marshall, R ri Peru, Cuba, Mexi te., 10 25 erent Norman Shultz, Box 746, Salt Lake, Utah , FEET Of i 1 § 25; 1,000 mixed, 40c; 1,000 hinges, OLD Money wanted. D 1 know that coin | N° lists. Sunset Film Ex l5e. List free C. Stegman, 5941 Cote Bril collectors pay up t $100.00 for certain 1 t r alif liante, St. Louis, M¢ S. cent And high premiu for all rare ~ 24 VARIETIES Cuban st s, 10 cent ns? We buy all kinds. Send 4c for lar List 6,000 low-priced stamps free Ad- n folder May mean much profit to you dress (Ct bers Stamp ¢ 111P, Nassau Numismatic Co., Dept. H, Ft. Worth, Tex St New York City, N. ¥ 200 DIFFERENT stamps 10c;_ 1,000 FOR BOYS Hinges if t Cariton, 80 W. 8o Temple, Salt Lake. Utal “THE Book of 1,000 Wonders’’ will LINDBERGH P issue ete sent postpaid for 10 Explains many m I Wirt! rs é Ave B kivn, N. Y fying tricks with coir cards, handkerchief STAMP 4 free ¢ for 1,2 et you can d Al stamps with 1 j f 50 st ps from catalog of magic trick k different tries f ¢ ent B. Nagle escapes, mindreading act 1101 M Re Pa fects, illusion plans, curi JUNGLE Packet. t l and id . elties from mar foreign trie i " Scarce t sortment, lowest price You will amaze and staloging to ¢ ‘ 1 to appr I mystify your friends! Send 10c today. Lyle applicant Wolf. 2962 West 24th, Brook- Douglas, Station A-5, Dallas, Tex. yn Y “DE LUXE Doll house plans $1.00.” Any- APPROVAL St , et sent on request ne can build for Christma Cc. W. Noller, Paul Cornis! Schenect N.Y 41-67 Forle St Elmhurst, I I THIRTY Canadiar including m- EARN Christma money Order 50 sets memoratives fiftee ent ipproval appli- Christmas Seals Sell for 10 et When a ' ants. Reid 8 Yonge St., Toront ld return $3.00, you keeping $2.00. No | Projectors, including ama i FOR Different st Grant work t fun. St. Nicholas Seal Co., Dept. | Ccucation. | " ee ig 6317 18th Ave., Brool 3PM, Brooklyn, N. Y ee ee ee ee COLLECTORS, Tr ir mission mixture DO You own a set roi AW We sage. 118 West Madison St.. heavy neels, $1.00 Ib. Yorton, B ipply thin lumber. White pine, t wood “TNT . PM, Sy: e, N. ¥ r whitewood %’’, 3-16" or %" x 7” x STARTLING Bar “or e pie $1 00 tnaid r ‘ ame projector tu BEA IFUL S&S free itl bargair F Whe Gardner ws - “igs Gardner W i for the 192nd Ra proval \ St p Co., Box 31, Eugene - . gram Never in |} ich Oreg a BOY AR Make ¢ one Sell Book bargains been offered guar FREI Brit lonial 4 et tal r e} to friends. Send 10c for paratu Write for your copy $1, w for 2 { Reuter, | pit Rosebud Art, 237 Lafayette St., New markable motion-picture ex erton. ¢ ' York $2.00 Sixty-six page cata FREE Tiue-Biue Book. Ex @ stamy CAMERAS AND PHOTO SUPPLIES Sa Ses See Sgn BB a ; ~—— a ‘ : ‘ Madison St., Chicago, Tl SPLENDID P free. A is. 7 PROTOFORMS—Latest product in the pi oat a Gace oo age 2 4 { Drake, Chicago ture ‘field. A te new a diff Figg ey Br ‘ NEWFOUNDLAND Postage. Send w aed Gacitinaa dak ak dices ales on _ An | City. Me ‘ ist Will quote t uit ri es Rev. But pituremen should send for deta at oF “; rIME Counts in apy f ler, St. George Ne inaiand Other including beginner will find it a r ‘ ’ nd 155 ‘ . LANDSLIDE Packet with $1.00 Lincolr aioe eaoestuaite. Aeciien sew eek Registered Patent Attorr $1.00 Frank 10c. | Appr Golder t Exclusive territory. Get in on ground D. 4 Rule St ps Box 1248, Chicas floor Hurry application National Photo- BIG Mone in pl grap COVERTCO P t 100 ifferent tammy form ¢ 448 N. Wells St., Dept. 20, Chi- ture prove Catal A 10 cents witt i int approval i Ill York Institute of Photog Covert Sta ? State, Rochester, N. Y PHOTOGRAPHIC Equipment and - St New York 101 DIFFERENT Fr vith 50% At ( f eve description re listed and MOTION P € f provals, 2c ta Noemus Stamp Co 1 in our 228-page log It will t roll Send f 312 East 23rd St New York I 1 to secure a Dy » i 1 ‘ 804 8S h W Ave UNITED St 1 Canadian 32-page free ir price e low W al leal I price list free. St bought. Stanley Gib- | in used ¢ vhich are sold under the same FILMS, 100 Feet i il bons, Ir 8p Park Row, New York City £ rante as new g I Ask for ir Bar- I e, Dept. A, 13 Chest THOUSAND Foreign stamy le: twenty gain B Central C era ( Dept. E136, eT eM foreign ins $1 Prof. McCreery, Chatham ! S. Wabash Ave Chicag 11! WANTED To buy—S¢ Ontari BIG Money in pl graphy, motion pi Simplex and Motiograph i PENNY Approvals that Satisfy Neil ture projection Catalog 49A_ free New tra mechar and stat M Gronhberg. Box 5441, Philadelphia, Pa York Institute of Photography, 10 W i gair P. O. Box 202, Bir RARE COINS St.. New York eee riMk ¢ ts in applying for patent See Only moderate nital 40 OLD . — = pargein Frices. ‘ . : ; ' frown. Warsaw. N. (¢ Theatre Supply Co.. Memphi I _AMI RI AN . Ger r 4 Per a ver EARN Big ne with ir camera in MOVIE Filr ] ft § +n . [ P = a ‘ t -atalog your spare time ising Halldorson Home shipped anywhere on rf ou nf ne b apia a’ P t Lam Write for booklet Home Particulars on request UNITED State Large cent tw ent Portrait Photography’ and catalog—both free 177 Golden Gate Ave., S bronze, three-cent nickel and bargain list The Halld n Company, 4747 N. Western MOTION Picture enthusiast ] 25¢ Thirt lat large cent $1.00 Ave Chica versal movit nd st et : George . : 2eakemen_ | for it richt now BR Max Mehl. X | American Photography, 116 Camera House __vEREMEN, Bi : : “fr matist, Mehl B Dent. P. Forth Worth Rest 7, Ma | seal €1 €950 montt Fx Tex. ‘Largest Rare Coin Firm in the U. 8. | | FILMS Developed. Special Trial Offer | Necessary. 810 Railway B —— — = - ; | Any Size Kodak film developed 5c, prints 3 . ‘ _RARE \ nited 3 seed and fore = % | eact Trial 6x10 Enlargement in handsome I I . war meda 1 decoratior Chinese ry folder 40¢ Overnight Service Roanok RACE Missing peonle. Fx and catalog Alexis Mengelle, Colorad Photo Finishing Co., 209 Bell Ave., Roa Open to all. Write N Springs, noke, Va quarters, 169 East 83rd, New }¥

7) POPULAR MECHANICS ADVERTISING SECTION

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POPULAR

GOVERNMENT Jobs $1,260— en—women, 18—50. Steady i offs.’’ Pleasant work Paid — Short Experience unneces- 1 itments yearly Full th sample coaching, free. Write Franklin Institute, Dept. K-14, . Y GOVERNMENT wants men ¢ and up at start Railway M examination coming. Let our r Government examiner) pre- for thig and also Rural Carrier, y Customs, Internal Revenue, and s. Write today for free book- ‘ 8, Patterson School, Rochester, Y ‘ plete instructions for recol- ’s shoes and pocket books, 2 or easily applied after you learn Profits $10.00 daily Reid, Miami, Fla in photography, motion pic- tior Catalog 49A_ free New ite of Photography, 10 W. 33d ~ York Y A Scientific Profession. Sanita- gy— Microbiology Extension tia courses Diplomas— Degrees R Urinalysis outfit and prospectus f Col » of Microbiology, 722 Cal- Hammond, Ind ’ l’ ire for any civil service ex- without seeing our catalog. Free. ( Correspondence College, Washing- OK For Uncle Sam.”’ Postoffice railway postal clerks. $1,700 Men 18—45. Sample coaching free. tely. Franklin Institute, Dept. r. N ’ id for photoplay and magazine We revise, develop and copyright > imission Established 1917 Universal Scenario Company, i Santa Monica Bidg., Holly- » J ediately men-W er 18 for government position, $125- No experience required. Steady tions with full pas Write, Oz- 101, St. Louis, Mo Schools, 801 Reaper Block, Chi- \ \PER Linotype operators highest en Easily learned, home or Free catal Linotype Institute, ont {[ANICAL Dentists earn up to $125 Big demand Learn at Los Angeles 9 mont Day or night classes individual instruction. No book Fiee employment service. Write for Sr Dental Institute, Dept. 8, Hill St., L Angeles, Calif 8 learn auto mechanics and elec- Big pay Big demand Free cat- Stevinson School, 2008 A Main 8t., City, M rRICITY Easily learned frown Hawk- trated Electrical Guides Write for trical question book Audel, 65 W New York OUBLE Entry Bookkeeping mastered in with keys; guaranteed; diplo- International Bookkeeping Institute, 8 Springfield. Mo — YS—MEN 16 Up Become auto me- — $1,000 year Particulars free Institute, Dept. K-400, Rochester, = DY Law at home. Lawyers earn os to $10,000 yearly Send for catalog School of Law, Reaper Block, Chi- COME <A landscape architect Un- rofession; wonderful opportunity iking. Easily mastered by mail ile you learn, Est. 1916. Write

: American Landscape School, 56, N.Y POPULAR

MECHANICS ADVERTISING SECTION STUDY Mechanical dentistry and earn up to $125 per week Learn at home in spare time to make crowns, inlays, et Write for information Modern Dental Institute, 49 South Main St Salt Lake City, Utah

RADIO OUTFITS AND SUPPLIES

CHEMRAD Radio chemical outfit. Ex- perimenters, you should know radio chemi try, the alluring, thrilling, new science Complete outfit includes chemicals, metal apparatus, instructions sufficient to carry on chemical radio experiments, even televisior Send $1.98 money order, or sent C. O. D Satisfaction guaranteed Chemical Radio Co., 4730C, Drexel tlvd., Chicago TIME Counts in applying for patents. See pages 154 anc 55. Clarence A. O'Brier Registered Patent Attorney, Washington, DC NEW Long distance ‘‘pocket’’ radio $2.00 No tubes or batteries required. Useful and practical, loud-speaker volume, order direct Spencer Laboratories, 116 Atlas, Akron, Ohio FIVE Tube sets $9.90 In table model cabinets Require repairs See our dis- play advertisement on page 172. This issue Chas Hvoodwin Co., 4240 Lincoln Ave., Dealers in bankrupt stocks TRANSFORMERS 2,000-y., $800; 6050 7% and 7%, $5.50; 550v., 5-5, $4.00; chokes 250MA, $7.50; 160MA, $5.00; 100MA, $2.00

Write for specifications Radio Parts Co., Orange, N. J “NEW B-Battery Eliminator 135) (vts., only $7.90 C. O . Money back if dis- satisfied Nat'l Co., 2309 Lawrence, To- ledo, Ohio WANTED: Men to work with National Ra- dio Service organization. No selling »me Radio Doctors, Inc., Dept. M, Essex St Salem, Mass.

TRADE AND TECHNICAL SCHOOLS OUR Com

ercial radio operating and junior

engineering course pays our graduates $150 to $300 monthly from start Rapid advance- ment. Winter term begins in January. Write for catalog of course including Extension Course Loomis Radio College, Dept. 5 Washington, D. C LEARN Decorating, sign painting, papet hanging, card writing Practical training, Idest school in United States Chicago Painting School, 448-A North Clark St., Chicago, Ill “YOUNG Men—No perience Become R. R. Station agents rraphers, or radio operators Earn $150 to $300 monthly; n layoffs; rapid advancement For free in- formation write Illin Telegraph, Room 711 117 N. Dearborn St., Chicago, Il “WANT A foreman’s b? You may be a good mechani it if you can’t read blue- prints you haven't a chance I train you quickly Write me your trade Carroll Rumsey, 266 Drexel Building, Philadelphia TELEGRAPHY—Both Morse and wireless taught thoroughiy Big salaries. Wonder- ful opportunities Expenses low; chance to earn part School established fifty-four years. Catalog free. Dodge's Institute, Fern St., Valparaiso, Ind LICENSED Radio doctors earn $:5.00- $100.00 per week Big demand: investigate at once. Free booklet. Radio Doctors, Inc., Dept. A, Essex St., Salem, Mass BUSINESS OPPORTUNITIES TOOL Salesmen—Sell to auto mechanics guaranteed line of 1209 Oldforge tool wrenches, pliers chisels screw irivers punches, tool boxes Exclusive territory Give complete information about yourself first letter. Quality Tools Corporation, New Wilmington, Pa SHAVE Without a r—Yes, absolutely harmless Send one llar for three large packages, enough for 60 clean shaves. (Agents wanted.) Cervenec System tox 4 suf- falo, N. ¥ HE Men onl) Send one dollar currency for information regarding United States Pat ent No 559,886 Particulars mailed promptly upon receipt of above Address Midwest Promotion Cp., 5 North Mair Hutchinson, Kans NO Peddling. Start own business. Home office Free folder describes 67 money-mak ing opportunities. No outfits. blite ¢ 54 Flizabeth St New York RUSINESS Profession of your own and earn big income in service fee See Steph- enson Laboratories, display ad page 148

MECHANICS ADVERTISING SECTION

69 $8,500 IN 17 Weeks—That’s what Charles Worthen made. Do as he did, specialize in real estate U my successful system, be- gin at home in spare time, few dollars starts se

you Full information free Address Amer- ican Business Builders, In Room C5, 18 East 18th St.. New York City CANDIES Homemade are only business where ‘‘Little Fellow’’ has the “‘Big Fellow’’ it a disadvantage Turn your kitchen inte ill candy shop Many now rich, started with no capital Trade secrets taught by man who made big succe himself Free talog Capitol Candy School, Desk AH- 917, Washington, D. ¢ FREE Sample Will interest mechanics, carpenter masons, common laborers, any- one that is progressive Address 43 Ww Cowell, Grayling, Mich STAKT Mail order business Learn how Write for details Mail Order News, 500 Fifth Ave New York MIRRORS Kesilvered at home. Costs less 5 cents per square foot you charge 75 cents I ense profits 1 like new brassy worn-off autopart reflector tableware, toves, et Outfits furnished. Details free. Sprinkle, Plater, 1 Marion. Ind COMPOSITION Floor making earns In- dustrious men $12 and more daily if used as trade Or make isiness of it with profits up to $10,000 yearly Openings everywhere. Semi-Tile, Box 4 Hollis, N. ¥ MANUFACTURE Paint, varnish about 60e gallon Formula $1.00 Louis Mar- tinek, Corona, N. Y MAKE Your wn products Formulas processes furnished, $1.00. Satisfaction guar anteed, or money refunded Clore, Indus trial Chemist, Crawfordsville, Ind EXTRA Money and a chance to establish ir own independence can be made with ell chosen spare-t ( upatior We help 1 find it Write A itional Service, 316 Third St New Westminster, B ; NEW Candy formula ill kinds for home, shop factor Originating I specialty. Pelmo Guillory, 2 Loop St San Antonio, Tex FREI Sook Sturt your own little busi ne u here elling novelties by mail. My beginner utfit ntains everything required novelties ircul instructions etc De- riptive book free Hadwi A-74 Cort landt St New York KING Syste ii rder business co- operation idea It's new Honest! Differ- ent! Big profit Details free. Evans P King Co Wi ingtor Del ANYONE Anywhere, may earn good pay raising muskrats in per in their back yard Bulletin free International Fur Co tox 638, Dept. 7. Inglewood, Calif MAIL Order |} ne information We divulge actual s irce f Americar made g ls. how ell 1 illy, by mail or through agents Chemica inalysi for l money-saving information pportunt tie Service catalog 16 tusiness Inf mation Syndicate tox 1OTIA, Knoxville Tenn TIME Counts in at gz for patents. See pages 154 and 155 ‘ nee oO Brie Registered Patent Attorne Washingtor D. ¢ OPEN Toilet ¢ is shop nywhere We Furnish everything s ple and = detai free Write quick Liebig teaver Dar W DAYLIGHT & for trucks, stores, can make you rict | the yourself Blue Print and Busine Information, two dollars Free-Ray I ratories 019 Willow &t., Chicag Ti! FOR Rest bu t opportunities read Dolsen Herald, ‘ 10c. Mail Order Business 6x9, free Advertise inch times, $8.00 Circular maili $2.5 sand 5,000 monthly 2 vear experience Paying i rint circular supplied 6 «Liberty St Brooklyn, N. ¥ MAIL Order business is your opportunity ‘ree particulars Pruett System, Brook field, Til RIG Mails fr everywhere, 10 Free with order for M Dealers, Agent’s Whole ile Directory 60 pages, entirely revise i 40 teli e, 6618 Quimby, Cleveland Ohio

Page 248

70 POPULAR MECHANICS ADVERTISING SECTION

LL R Port Pr s MAIL Order busi: your opportunity LIQUID Cold Ider M f ! f i B iser's f hand t } by expert 28 I r Ss s $9 I ear ( ear exper € how t tar elli f “W 1 ir Por } ) S } j kée t | or t \ A ed Chemi ] mond H N Y capital Fascinatir profit c Set J Goob € en | o0.6 I r . FORMULAS I f rite f " 4 D P $s Phila ia Ss per ed j l } M ‘ t k ~ I Ny for ther ten if at i $100 FARTS 3 CHEMICAI xpert w f h f ( ] i & r and le All Li free ] free ( r D s ! k W. L. ¢ Ph. D., 228 Gor Ave MONEY M I in 1. Y S s KX. Y vy co | P NEED M 0 i DON'T Se for I I $ N. ¥ orde } * elf Make ( pr I t FORMULAS ( P 1s I ‘ h ¢ j ti e test 1 La ( 8 1 Ss PD Il Vv t k fre Nat il ‘ zo ACCOUNT ¢ s fic Laboratories, 1984W Broad, Rich DON'T Sell for others. tunit | icular Bam Renf ! 1, Va elf Make your mn pr Ca ‘ ‘ CHARTERS: Dclaware; | eapest; | articles, household specialti« START A ¢ ite Dr. hit n free f Colonial Charter Co., Wilming- profit Valuable booklet free fecti P P t Make a ton, Del ” Scientific Laboratoric 1984W |] ogee ae Ad reports $364 profit —TNPATENTED Ideas can | 1 Yell | mond, Va. _ in tw We " Wr Long you how and he you make the ile. I ree SUCCEED With Y r Own Kak High §$ Springt 0 I lars (Copyrighted Write W I Make them yourself. Formulas, | Sa Gr e, 810 Baltic Building, Washington, Trade-Secrets. All lines. Catalog LOID 7 : = jerf dD. ¢ free. B. Tt axiy «« Wa r amazing ery: re r, new ft A BUSINESS of Your Own Making— FORMULAS—170 Mone ker ish t i x I es! Not a Spa ng Glass Name and Number plates il trated talog 2 Ice | polist sn maint or wa With 1 Cheekerboards, Signs tig book and sam- K) Park Ridge, Il si ple guarant ea : , ea ple free E. Palmer, 540, Wooster, Ohio 000 VALUABLE For manufacture I I earing $14.00 gal MECHANICS, Painters, carpenters, start National Service 37 Mari lon profit Clear ¢ i th tt furniture refinishing, painting, handyman Ohic ; . To s ate “ne aout) dial Miller, Chemist shop on nearly nothing ; winning plan bey ~ See Ride Ta io F = brings ecu mers quickly John Braceland FORMULAS—hHigh £ ~~ . —a : 1439 So. Ninth. Philadelphia, Pa processes for pr ing 1 r MILI IONS St: t tage \RTIFICIAL Marble sanitary flooring in- best selling st t ! pate ‘ ; ou Ps poset sheiagegccren structions, covering wood or cement flooring formulas t re claw InGisper ¢ ee % inch thick, fireproof, waterproof, all col- Miller, Chemi 7 E. J no 8] . r . 7 or low cost Orr ental casting, concrete ment } f r ! el I € ru € = . “ ‘ ) leg +i rarcder I er I er-mache ’ SHO! s t r Lear \ Star 1 i t € f it t he i lt , r 7 everythi men ind = ow n, $ ) t i it. ¥ I $ thing \ S ie ic Amer H $10 e¢ operatir our “New 8 or more per ‘ Rer . ‘ K . t s ilty Candy | ri Pe where t to ‘ f Pe. é Opportunity lifetime: booklet free Ww wi need mo ¢ ATTENTIOD kestat for : a H er Ragsdale, Drawer 4, East Orange, into this busine W ayste t N J 1 need t \ ‘ agency; office : . . — SUCCEED With Your Own Product license. No d i Sta p fr et Hayes Re A i Make them yourself Formula Processes eat, and food |} ul ‘ U Trade-Secrets. All lin Catalog, circulars elling t ! free B. Thaxly Co., Washington, DC r in the v 1 sg LEARN the c« tion t me Good t ‘ food i come quick result Interesting bee me nd ever ~ ful ¢ lecting’’ free National Collec ré g t r tors Assn., Long St., Newark, O} er ¢ ir e. Your? TELEGRAPHY la t y TELEGRAPHY—Both Morse and wirel« ; § ! t taught thor hh} Ri ric ww I } } ! Re ( » ‘ Ex } » | ; € 3, 1 « hed ff ' » | I I t P , n ( f D I H | ® . x is v Ind We furr ‘ } for you to t ‘ I CHEMISTRY » Srey f ¢ wr SUBSCRIB I e new 1 ( } 1 ¢ A \ ! Ar Z ( est 111 I I I fi f il ne ex f ent i I Ref j r ine, ne¢ for X- I t R ig A ] l t light, radi et Three ( A k ! . { . ¢ »wTt T 7 ; ‘ggeh ooie PRIVATE 1 , to ir ediate yearly ibe Pop- = -., 4 ‘ r Cher Dept. DP, Swe ro, N. J Se BOOKLET Of experi ents cl l , a” 1 get all the repeat t t 10% George Ott, 1218 Chestnut ain Ghar ethaae at ball a on K r, Penna cot a salt. Wilaent YOUR Chemical problems ed and w : ‘ Extre y for ila r nr ¢ rm ed f r . ) \ : ‘ W. Stedman Riel 1, Industrial \ f ‘ mist, Box 2402, Boston, Ma " € ] ¢ j I 7 A FORMULAS AND TRADE SECRETS National Scientific J isc BRINGS Big bunch mail year. Ken- | ANY Formula 50c, Catalog 1 Rernerd | Broad, Richmond, Va tucky A ( neton, Ky VW 852 George Cl AGENTS I'll pa DELAWARE Incort ator Charter fee FREI } i g describir r e for ‘ small: fort ct G. Guyer, 901 Market line Western Chemical, § Ore ‘ e of my | i St., Wilmington, Del TRANSFERRING Photogr n I full or 7 time. You t BUSINESS Oy rtunitie Men a et for " **Erie,’’ Waukegar I $15 a day Ride in Cl nen met ne Big profit } A OUR Tested detailed f , ms tribute te ‘ Tee Barr ( D ee n, Pa thers we Particulars and new e ¢ 1 furnish ¢ - | 1929 catalog free. Grinstead Company, O finest super sale tf SIXTY Successful mail order prbpositior i ‘ sized packages low pr K. H ‘ 919 Metr ta Chicag | . « 0 nt | LATEST I i S r= SELL by Mail! Be ks novelties, bar | ple Scheiderer R. I - =o v Va ~ 97 D rains Large fit rt irs Free Mar ille, O Pp ¢ - 0 B-Elfco, 5 South Dearhor Chicag INDUSTRIAL Chemi fur hes for : I MADE $30 a Week Home. French | Plat All _ line “ 2S See oe be Seaindine” 1 sear? gees Deeb 1 ¢ nteed. Lists free. J. F. Mazur, 941 | ture 5 er. All aut l ooklet tell Ashbrook 67, Marengo, Ohi ; 4 Lorain, Ohio. w, L3-805, Wheaton, Ill.

“J bo

POPULAR MECHANICS ADVERTISING SECTION

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POPULAR MECHANICS ADVERTISING SECTION 71

/ oO $100 Weekly. Men wanted to EXCLUSIVE Agents, either sex, can build MY Agents make $90 a week wearing and r e the fastest selling automobile a steady repeat business with Darn E-Z Ad- showing my beautiful new free raincoat and in the world’’—Brite-Lite—the hesive Fabric Cement. 100% profit. Money Kiving away free hats Write today yon gnetic safety and emergency lamp back guarantee. Write quick. Dept. PM 2, yours Robt. King, 230 So Wells _ rt a perpetual flashlight No bat- Darn E-Z Laboratories, Dayton, Ohio AB-12, Chicago i . it yuy It sells itself on sight. TIME Counts in appling for patents. See NEW Invention—400% profit. Liquid k ts now being allotted to live pages 154 and 155. Clarence A. O'Brien mend for fabric and | rosy —— quit Write for demonstrator and sales Registered Patent Attorney, Washington, Every worn any have 100 pos a ~ 1 to National Electric Corporation, dD. Cc LE J “rere og De other fast sellers St.. Newark J 7 oT - : i . ept. 472, 6129 Went- * ifer more for the money f sooty nd tone ay em yor en NC ENT Ss sewing kits offe re fe P mo or res anc €8; supersedes vulcanization AGENTS ¥ P : ther article on the market. Con- at a saving of over 800 per cent; put it on Men's ee Seu seammne’ Ee L 2A. — t spools of thread, assorted colors cold; it vuleanizes itself in two minutes, and Leather vests Dress and rece 4 , ats tockings, lingerie and apparel is guaranteed to last the life of the tire or Ledieg’, sease. ead chitien annel x uirts en, assortment of needles, thim- tube; sells to every auto owner and acces- sweaters nr ill ees “1 yi n’s = i rwear, threader, premium coupon. As- sory dealer. Full particulars how to make big Northern Sales Co 101 os a , _— free n attractive, decorated box. Re- money and free sample, address Amazon - i ERT We — as : ems. _SUiCage. profit 150%; sample 25c Other Rubber Co., Philadelphia, Pa., Dept. 505. on Ire > ” 4 ( 1.8, sheepiine coats eathe cK- +O A Soe a WANT Distributing Agent for Handslick, | ets, shirts: popular prices Ount fk =. . 2 powdered hand soap; removes anything from Commission 25% with bonus Hydro Rain- ( fs—3135.80 Daily in advance, intro- hands; everybody a customer; sample free coat Co., Dept. 45, 718 Indenendence ~ R ew insured hosiery for men, women, Solar Products Co., J-2142 8. Troy, Chi- pe ° » 4 ndependence, Chi Must wear or replaced free. 57 cago IO. o—— : t ) colors including latest “Silk to | “GENUINE Gold Leaf Letters anyone can $100 WEEKLY Appointing agents Mother sses ladies’ hose. Nyland made $595 | put on store windows. Guaranteed to never Hubbard Foods. No canvassing, delivering irculars nth Edwards, $460.60. Mrs. tornish. Large Profits. Enormous Deman¢é or investment Mother Hubbard Products, ( $425.4 Why not you? Even spare Free Samples. Write today. Metallic Lette. 4-F, Congress, Chicago ; iid pay you $3.00 an hour. No Co.. 438-D North Clark, Chicago BE Independent make, ell your own 3 e needed We furnish samples. “DONT Sell for others. Employ agents goods. I profits. Catalog depend- ‘ Write quick. Macochee Company, yourself. Make your own products Toilet able formu special selected agents’ best 2, Cincinnati, Ohio articles, household specialties, etc 500% sellers free R. Lustro, 626 Reaper Block, MAKE These guaranteed biggest selling profit Valuable booklet free National Chicago irself. Have others selling them Scientific Laboratories, 1984W Lroad, Rich- AGENTS, Portraits, photo-pillow tops, i ill; profits immense! Loid-Lac mond, Va. i - frames, sheet pictures, medallions, photo- ! Automobile Refinish. Tuf-Nit pre- AGENTS $240 Month Bonus besides ewelry, soaps, perfumes, laundry tablets iery runs Kazok automobile dry Producers earn auto. Introduce new guar- food products, toilet preparations, luminous My ‘‘Eye Opening’’ literature of anteed hosiery—126 styles, colors Finest crucifixes. Catalog 200 specialties free 0 1 many other automobile, food, silks Credit given. Samples furnished days’ credit Jas. C. Bailey Co., Station eaners soaps, polishes free. Wilknit Hosiery Co., Dept. 6031, Green- C-12, Chicago — M ! wn goods for one-fourth what field, Ohik GENERAL Agents: Something new. Whirl | Brand” and other goods cost you. AGENTS—If you need money write for wind = seller Repeat washing powder M Chemist, 706-A Chemical Bldg., free sample So Easy Mystery Polishing Cloth Washes clothes without rubbing Women & Oni Mohler, Box 453-F, Chicago throw away washboards Big profits Ex ‘RESENTATIVES Everywhere sell 5-$35 YAY Easy Sensation ea clusive territ t Write today free package ly known trade-mark protected oon p EK ah. ; pues % 4 ‘\ ~~ anaes lge Co., 82 Putnam St., Tunkhannock, for mortise locks Rasily dem- Oiler Every auto owner interested. Makes ‘ . Easily sold Send 25 cents for any motor run better and quieter Sold on BIG Xmas seller! Merchants need colored Special wholesale rate to represen- | 20 days’ trial. No selling experience nec- | @mbossed signs. Everyone buys. Extra large Keelock Manufacturing Co., 529 essary. Wonderful opportunity Ww C protit Dime brings fifty cents worth of sam . Brooklyn, N. ¥ “ Pierce Co., 2422 Prairie Ave., Chicago, Tl ples. Franklin 22 Third Ave., New York PORT Your own goods German ex- so — we : SOMETHING New $15-$25 new ine published in English, offers $15 TO $25 Day E. Z. Just patented product costs l5c, sells 50 TT bargains latest novelties; oppor- Master Mfg. Co., 2430 No. Tripp Ave., Chi- year round. Write Reliable Co for btaining profitable agencies. cago, Tl - & S. Dearborn St Chicago Square Deal Supply, P-246 Fifth $20 DAILY Selling box assortment 70 en AGENTS—Latest patent guaranteed bread N rk graved Christmas cards with interlined knife. $1.00 seller. Sam furnished. Ter- Men’s neckwear; wonderful proposi- | envelopes to match. Sells $1.00, costs you | ritory open. Ideal Utensil Co., Otis Bldg., Astor 18-M Broadway. New York ie Sample box sent free upon request Chi : . MacDonald Company, Vineyard Haven, Mass - . _ — . . Up on pearls; every woman a ae “ BIG Pay ever da showing Nimrod’s good money maker. Write Ori- MAKE $75 Weekly applying genuine gold | aqj-VYear Sellers! Dress, work and flannel rl. 925 Broadway. New York leaf window signs. Our lower prices give hirts, overalls, pants, sweaters, underwear, New and better Lemon pie filling larger pronte a yee hee — pajama leather coat lumberjack play- th 1 lemon juice. That's just ples. Premier P-179 N ells, Chicago oor + ae Seeadinens eiineannanian Rie f the 0 quality items in the great EARN More money. 31 page catalog tells outfit free Nimred Co., Dept. 8, 4922-28 f household necessities. Samples how, free. trookins, Warren, Ark Lincoln Ave., Chicago profits full or spare time Ter- GET Our free sample case—Toilet articles, WRITE For free catalog phonographs en Write quick Blair Labo- flavorings and specialties Wonderfully pro- record and ipplies Orthophonola Mfg STCL Commerce St., Lynchburg. Va. fitable. LaDerma Co., Dept. A, St. Louis, Co., 757-F, Broadway, New York PALLY Genuine DuPont Fabrikoid Mo ee COMBINATION — lroning-table-stepladder No laundering—wash on the ta- AGENTS—Sell raincoats (34) ample Agents’ harvest Cc. R. Smith, Freeport, like linen Also other DuPont furnishe Write for free raincoat offer Ohio Doil-Ette Corporation, 1018 Wa- Barton Co., 8, Marshfield. Mass - MARVELOUS Seller—War Souvenir Me ( ag NO Peddling Start own business. Home morial ; Columbia Portland Oreg KISTMAS Specialty Make $3.00 office Free folder describes 67 money-mak- Samples ng stores and homes our beau- ing opportunities. No outfits Elite Co., ARE You old at fort Neo aur adver Christmas window display cards; also 84 Elizabeth St.. New York tiseme n page 44 of this issue. The Ele ‘ t sales cards - Useful Holiday WANTED—Agents to sell snow lugs to teo Thermal Company, 2112 Morris Ave., a 20 other wordings aan sna. automobile and truck owners. Britzius Mfg Steubenville, Ohio € te lay Consolidated, p9-Q, Co.. Dover. Minn IT’S New—it great Sells everywhere ‘ Van Buren, Chicago — ad how! Metal polish in tubes i= on GENTS $20 Daily! Latest patented AGENTS—Best health garment men and portunity you can’t sfferd te mies Trial ! board pad and cover combination women ever patented; keep $2. remit us $4 fume tee P. M. Reid. 1619 Clark. St ( eed Low price Sample for your- Satisfaction guaranteed f Liberty Brace-Belt, i : es ’ f fr ohne an Braiding, 329 AS, West Inc., 2929 Broadway, New York 510-335- DAILY —Stmnly showing new ree ia NEW Baseball game board. Makes all Polly wrench. 10 wrenches in on NDOOR Racing—Fascinating new game. the plays of regular games Quick sales anteed seller Sample free Gellt $5.00 an hour Big season ahead large profits Send $1.58 for agents’ sample. Co., Dept. 6F, Rock Island, Ill l entertainment. Ideal gift. Sam- Chester Brown, 510 Van Buren, Chicago $300.00 BEFORE Xmas taking orders Tor postpaid Write quick Manowar, . : > s : : miinostens Bultial Muckies: ether fest. ott N. State. Chicago BIG Money in Christmas display signs. eHiNestone SnNtial Put Omer te ellers - | Merchants buying for holiday business Experience unnecessary. Pay daily. No in- ENTS—Make a dollar an hour. Set! | 500% profit. Free sample. EverReady, 52-A | vestment. Qutfit free. Chaton, 600C Blue nd of sharpeners. Sharpens all knives East Ninth St.. New York Island, Chicago Is quickly Demonstrating sample om : : ENERGETIC Agents wanted everywhere for ‘remier Mfg. Co., Dept. 86, Detroit, MAKE $2.00 Every hour. Sell every home article appealing to men and women. Richard wonderful preparation: mends hosiery and Lavers Asbury Park ‘ : clothing without sewing. Invisible. Results —_ CRIFICING Showroom samples, ex- |. guaranteed. Send for free sample of work INVESTIGATE Our unique sales plan fall dresses. Peddlers, storekeepers, Queen City Laboratories, PM-12, Cincinnati 250 household favorites, quick sale 100% lress parlor people, write Hirschlar Ohio profit steady busines Davi Household lobbers, 249 West 3 New York _ *roduct Yept. 510. 23 ) rt we - 1 Vest 34th, ew York $20 TO $40 A day selling amazing Gitenife + nla Dep 10, 234 W North A ‘AND New Xmas proposition Chance on cards to stores Ranks, garages Large : 7 _ ip Everybody buys Collect: your companies buy in thousand lots We imprint HUSTLER Agents: women. Earn on in advance. Free outfit, A & J names Wasy sales, big profits Free sam fifty dollar n week staple article & Novelty Co., G163 W. Washing- ple outfit Gits Co., E5419 W. Chicago vear round seller t ill classes Foamadent ‘ hicago, Ave., Chicago, Ill Co., Jamaica, N. Y Box 19

POPULAR MECHANICS ADVERTISING SECTION - 9

Page 250

A( p $ W are broa Y take c deliver New Brand k and free ( i Shirt ( 1581 ( or AGENTS ) M Sell silk M pla piar use W ef I ( si y ( 0 DON'T = f I y reelf \l r ‘ article ! id i ‘ profit \ free Scier I tori S4W Br mond, V fabr

POPULAR MECHANICS ADVERTISING SECTION W lan i i B 3 | Nati al i, Rict and troduci Free f r New Way I r ie Dey M iT t Ohio $1 A DAY Sure Sell ed i leather shoe { uled low ‘ x styles; men vyomer chi er F ree Outfit off mmplet ine hoe ir leather at put Consolidated Shoe Syste D t 11 Eau Claire wi WELLS Cleared $620.00 in one hw **Busine G und =free¢ ervice Write free utf Prof. N Dept 34. Naperville, Ill SELLING Like blazes! 4 ‘ ilet goods a riment at $2.2 with 2 piece ur fing set free to your customer { profit E. M. Davi Dept 11, 234 W. North A Chicago AGENTS—Mer : irpose $9 ¢ rkmar p fit guaranteed! $2 ior Ivance Free k Fitz-1 ilorir Co Dept. 172-4 Ss h Whitle | AGENTS—Make $3. = hour - ox ders f t nating K ner tle No ‘ r Write ‘ ( il Prod ‘ De Mi 7. Newark. > | 12 MILES O l W lerful ture \ l f ( low, L4-8 Wheaton, I WILLING T f $1 : r Bu Ax M Weather 8 loor | I M ed ‘ ( W M store ‘ f set R York OUR Pa ¢ Send $ f Auto-1 . 42 | Cit I SELI a Koel & Mor Ss M YOUR |} Prod M them t G teed formu t ! \ ne I jaltie R Box X, St New York $12 DAILY St new t Looks like lit W like saundering You tt rd liver. Pay dai Ss e fre 152 Irvir Park Stat ( igo HOUSEREEPERS Di orner earn big mone elling ¢ Shields; write toda Ideal Stairw ment ¢ 1) t PM ( r oO SELL Beautiful Style Tail pajan ber acket ind neckt to wearer at factory price Many earn $50 first week in spare ti weekly full time ¢ Howard Shirt 121 Van Burer 37, Chicago PORTRAIT Agents 1 re any other f ent Writ« new P t enlargement lion \ J. Kroll & ¢ 2 State ( I ~ AGENT H n-t ing dre spare ~ f he off I § 84 I St., New York \ ~ T c f . ‘ for 12 0 $ ad rerritory protect Write M Morelar Cl I St I elphia, Pa SOMETHING New kiver t t | t Magr Eeme Ww 0 € t j ak " Ex ence ‘ 1 $ hour Full t evenir Write for ] Wonder p ¢ Fisk Bld Dept A, Ne Yort AMAZING New varie r s ever vomar I ¢ n ‘ plar Inventor 1902 San P Oakland ( f $ 000 PICTURE M rie ace nv ing Beginner in make $100.00 t I es talk, Experienced men mak I Free book. “Profits in Por trai explains § e free Picture Man Fri nar Dept. 8-B, 109 W Austin Ave., Chicago JUST Out—New patented apror No tring r stray $20.00 a day every day; over 100 profit; cc issior lail Write for free offer Sta-Put ( De; 212, St Loui ~ BECOME you home town leading busine r Sell full line of groceric motor oil I erybody a cust er N apital or experience nece ry Selling itfit free Write Loverin & Browne Ss State Chicago WE Start you 1 a protected busine of y vr $100 S200 eekly easi made w it apita assing, I ze New intr ior District I ‘ men or women f facial 1 age in t ent; «¢ r lemand and prof few ' you I par- aw Com r 68 M ing Work ‘ AGENTS §$ M t D> K it bh k like ne R ase } l r er N p or ' é fom 7 Wor } Mah ( Lesueur Ce M MAKE } ‘ red Wr P ‘ ‘ : Ma W Br I v p W ] ( R ' F ” { I r ¢ I AGENTS—1 Py Perfect ¢ , r ation, insuring I pportunity to t t ti I n Mills, Everett, M AGENTS r for (

r end 25 er 1 Medina Rosa. 78 M ( Mex ~ BIG P elli iseful I ect ur Part ilar free D ( W Lé non, N. H 2 SECONDS $ ¢ nplete tire } Detmer, Oni with More Quick A Tool Sold ingly 19 three £100 Andersor Mont old 1 week Get details for good territ vest time now {. More Rim 1 falo, N. Y “~AGENTS— Big profit : ing board pad and er Eve buys Write for outf offer! B Blanket C Dent. I Burlingt AGENTS—Mosco Corn nd ¢ mover will buiid you a st t Send to for p et-size trial Mc Company, 418 Searle Bidg., R N. ¥ MAN In each town t plate reflectors, bathroom fixture refir mirror chandeliers: b new met apital or experience required Ss f manufacturing at home starts M money-making busine Outfit f Free particulars and proofs Gun Ave. H, Decatur, Il

Page 251

POPULAR MECHANICS ADVERTISING SECTION

S Wanted—-To sell Electric Hair ( Retail at $8.75. Guaranteed “ every home The Master Appli- ance Box 33, Facine Junction, Wis. VU Polishing clot! they produce Be our local representative—big r you. Testing s: 4 Arveo ; Dept. F, Grosse Owner tire agent wanted each lo- e free demonstrating tires and ers for new heavy duty Mellinger ranteed 15 months against all road Shipped on free trial Get your und earn $300 monthl no capital e needed Write Mellinger Tire

( 282, Kansas City, Mo., Warren ( kland, Calif. joney and Past Sales Every owner { Initials for his auto. You charge $ ke $1.35 Ten orders a day easy \ r particulars and free samples. 4 Monogram Co., Dept. 40, East Or * aes a a 5 GRAM ' made it. Unequaled, amazing detailed offer, «gs y re »» New Bedford, free. Concentrated Products Co., Box 3772-P, —— Tampa, Fla a NA Sale v6 per POLMET Polishing Cloth removes tarnish | “°* * ste Geass. Slee me from metals without the use of liquid, paste peasy P rhe 1 a ss line or powde oO igents s it sells ie , 2 ; . ; 18 pe oe ; can I le vo "Galea beautiful 4 color * sree Lion Mfg Co., Ince., oro St., Boston, Mass : Bn W. Erie, Chica OUR Luminous Crucifix Shines in tne inst: ate — _ -_ Yaa Riana ee Dark. Every one amazed at the wonderful ee ce rasor blades with effect Easily demonstrated—easily sold out taking blade from razor. Se to every W. G. Hannan Co., 2543 So. State St, | Self-shaver. Popular price. Over 150% Chicago profit Quickest, ea tropper ever ir AGENTS—Engraved name plates, eigns, | ‘ented. Hono-St Corporat! HC4, Bal- numbers, ete., easily sold, profits large timore, Md srett Bros., Roxbury Crossing, Boston, SEVEN Eleve Brand new. Punch Mass board Side en $200 weekly Free CALIFORNIA Perfumed beads selling like | Catalog. Nothing t rr Ru 9 Mad- hot cakes Aoons coining money Big ison, Chi profits. Catalog Free Mission Factory P, ; : ' 2328 W. Pico, Los Angeles, Calif. 78 ' BE LL ts hit : $ veekly empty PHOTO Medallion Men and Women, the usa aha a a largest line of Photo Novelties in the world - veaggp oan , . ont. be 4 Lowest prices, quickest service Send for eral reper mo © Seles Co, S500 catalogue showing over’ 200 money makers Ravenswood, Chicag Photo medallions, photo medallion clocks, IF You want £6,000 the first year write me photo mirror photo fountain pens, photo personally Strong retail store line Na- powder compacts, ploto jewelry and photo tionally advertised Established company butt ns Gibson Photo I welry Cc 608- Liberal week vance to a Succes Busy 614 Gravesend Ave., Brooklyn, N. ¥ eason now. Geo. R. Willia 2010 Euclid P t. 1200 evelar } HIGH-GRADE SALESMEN WANTED a aR - SALESMAN $1! Week! selling fa $273 PROFIT One day. That’s what A. I mous Gilbr medallions, photo Bradley made without experi e, just show ewelrn photo fountain per ete 400% ing the most amazing automobile light you rofit Quick ‘ Write for free partic ever saw; 38,000 candle power without glare; t Gilbert Photo Novelty Co., 8 Cooper fits inside regular reflector, easy to install: Square, Dept. J. 9 New York City wonderful patented device i 7 y Pocit t tatir eliminates glare without A PAYING P . representative pocket big money wail ; f character r a . Lon aeal arcana nn whirlwind seller make tounding demon- = Bg lietoge addi. . Permanent stration; low cost; ager eaning up 30 Write now for free book *"Getting Ahead.” profit: big repeater: sells on sight Finch Tanners Shoe Mf ( 0311 C St Boston, sold 1,298 sets in six 1 will sett | 3% ae over 20,006 sets this ye 24,000,000 pros- WALKER Made $ ) first day selling pects want this light: write toda; Aerial collection system to d t ind merchant Electric ( 326 West Ohi : Chicago. Costs $2.50 Retai $7.50 Write Adju UNEMPLOYMENT, Elections, make slow | Ment Bureau, Mobile, Ala collections for all merchant Give them SALESMEN | tributor To sell di what they need Not st collection system rect t bank wye lent erchants Complete automatic credit 1 collection plan garage ill busine 1 professional men Gets cash and keeps t r for merchant the new Deluxe Reco r Ta t Keeps and for you u get cash on repeat ‘ Sav orders for supplies without call-backs. Auto- t erage matic income for you. 250% on original iculars sale Full or spare time Judge by re- emple sults! Commonwealth J Publishing Cx 508 Court Bld Dept :. M i Mir So. Dearborn, Chicago a ———$_— ee SELL Thien lab r Br 1 new FEW $1,000 Monthly earnings ads are propositior ( r t | elaborate truthful Our men actually e c outfit free 4 nee $500 regularly selling ou rm ] tiou M Q1132 the newwceomer in electric window salesmen s R e, Ct is making a big hit More for the money - than anybody give Business posters for EVERY Home a } Make big mone every line. Changeable letter system too Take order ret , Experience Permanent business for you working with us nnecessar No d eason. Com! ior Territory protected and repeats credited. Fat paid weekly. We liver lect. Write Perry commissions, ‘ull details will prove very Nurser Dept. R-1 Rochester interesting. Display Products, Ltd., 409-A WONDERFUL 1 , S fifiv @ East 31st St., Kansas City, Mo. elones minut Re n sight at $3.50 — - ——- steacticn mrnmnneitios s r leal Zonk $50 TO $75 Weekly selling new improved | Attractive Drone il Sealer Ci ' t coveralls and service coats wit istomer’s Jaftre N a name embroidered on back to garage il . stations, ete. Advertising value and unusual SELL Printing at % 1 Big co construction gets the big orders. We pay ior Ul r Pr wines . biggest commission Free outfit, Am. B. LIBERAL ¢ for selling adve Co.. 329 West Monroe, Chicago. tising thermomet le by worl est $10-$20 DAILY Selling printed stationery manufacturer f tl eter Profitat and new advertising specialtic blotters and proposition for energeti - er Writs Eiving envelopes. Good sideline. Liberal commts- | past employment and reference + nancy sion. Free sample outfit. Embograf, 4558- more men neece Taylor Brothers Compar 62 Elston. Chicago Divisi of Taylor tr ent Companie —CHRISTMAS Cards—-Start early. $2.00 | Rochester. N.Y - hourly, spare time. 8&7 samples free. Win- PROVEN Money-maker: New electric hot dermere Press (Established 1900), 6702 dog machine; s¢ $ se ion $6.50; Dorchester. Chicage buyers t iy on ht Leonard E. Dickerson, “YOU Gan make $9 to $ y with guar- Dept. 1 Springfield, Mo 7 anteed home necessits Sell dealers or di- WANT Sideline income of $4 7 8 yeu rect. You are exclusive territory renresenta- Write for free pocket s k of new tive. Send 35¢ for sample and territory ap- ivertising kitcher Ider = erage two pointment. Moth-O0-Way Distributing Co., easy orders a day fr retail and ether firm Worcester Bldg., Portland, Oreg. Box E-222, Boonville, N. ¥ -_—Am eT TT OU lUhT|DUCm KOTO OOOTVT KA OTe

iyrwerwe ese SOS Ar rah «= etek ea he ta

ABSOLUTELY New.

73

Page 252

74 SALESMEN nufacturers, Calling on ma

depat mt stores, institution chools, ¢ Sell he iilding uperintendent a_ giant pump jaranteed product removes stop pages in plumbing pipe 1) commission on eacl le Regular ter may be placed on tri I Pocket selling ou fit free i a iy Corporation, Key 4H, 79 Madison Ave New York City SALESMEN—$i5-$100 Weekly selling high grade signs, calendars, fans and no cities; full or part time Big commissions paid pr pt Sample outfit ied Write today Scioto Sig Co., Dept L Kent ol SALESMEN—Men’'s Ra Swi G et ind Jacquard tie New artling feature highe i I Wor rt itfit free National Service Mill 2054 83rd St., Brook lyn, N. ¥ BIG -P every da showing Nimrod’s All-Year Seller Dress, work ar shirt pant weater ul paja it her { ‘ l T \ suit ‘ Experience unnece I fit free Nimrod ¢ Dept. 65 Lin \ Ch IT’S Lega New i aplent liffere G I whirling whee fasci € every! Merchant buy eager Clear up $ $150 weel Cigar Store Dept A, l EARN $20 A d Establish 1 e for life ng r $1 a year, $1,500 accident poli Write W. Cc. S 1} So. LaSalle Chi ) $18 TO $2 Daily; | est seili line of 2-pir i $9.95 and $12.50 I , wool g ) (regular $28.00 value All-w reoa $18.50 Splendid 1 coats \ nd t iit IR est ¢ mi r I tfits Ji I er, I Dept. 212 250 S. Spaulding Ave., ¢ 1 tl SALESMEN: If 1 are an average ( man and willing to wort i 1 wet V have a roy iti at ne¢ 1 $100 to $150 per week constar Cr i n re peat busine 4911 Lineoln Ave., Chica SELL Adverti id = penci 8 lid Christma per iiler l qualit r ymmmissions; dandy side-line U ing Pencil Works, Quincy, Il $100 WEEKLY Easily earned selling patented electric water heater Sel for $6.50 You pay us $%.00 Jiffy Electric Water Heater Co., 842 Maxlow, Detroit, ~ SALESMEN—Farn $10

ders for Dazzler giow electri signs Big commissi ive terr r High grade propositior Write Chicago Sigr Sales Co., Dept OH! What a sidelin e getter $41.00 ¢ 1 Collects accounts ] tors dizz (2 first Ww iver and ¢ Full mmissior ll reorder

( Federal Sample free

$60-$200 A WEEK. Genuine Gold Let- ters for store windows. Easily applied Free samples Liberal offer to general agents. Metallic Chicago. ALL-YEAR-ROUND Profitable selling wonderful new water softener and cleaner. Removes grease, oil, ink and dirt quickly Every home and business place a live prospect 100% profit. Big repeat or- ders Exclusive territory. Write for free opegie. Seacoast Laboratories, Sea Bright, Letter Co., 438-A North Clark, business PUNCHBOARD Salesmen. 2 hours $100 every week New line Lowest Full commission on business log free Puritan Co., 1409 n, Chicag SELL Printing 600 free cuts defy commissions advanced. Pocket outfit free. Kaeser & Blair, Dept. 13, Cincinnati, Ohio LET | heip you build up a repeat order business *s, auto oil, paint, poultry and stock lies No rent, no investment in go pay Write Hitchcock Hill Co., W! Grocers, 38 W. Kinzie, Dept. 1, laily prices. repeat Novelty Cata- Jack-

line Ju ‘tition. Largest items

big, perma- handling gro- sup- is Chi- SALESMEN our line newly patented mers This new, thoroughly eliminates competition, es easy Ni holls PUNCHBOARD Karn 20° selling dealers Sta-tite’’ ham- practical idea and low price makes Tool Co., Lemont, IIL. Salesmen It's easy to

repeat nmissions with the Lin- Merchants everywhere use ds Someone sells them! Why Big pay every day Catalog free Sale Co., 9 South Clinton, Chi- D Sell for others, Employ agents Make your own products Toilet household specialties, ete 500% profit Valuable booklet free National Scientific Laboratories, 1984W Broad, Rich- mond, Va SALESMEN—Become Independent Own your business; experience unnecessary, sell- ng our $7,500 Accidental Death: $50 A ident; $25 Sick Weekly Benefits—$10.00

yearly Other amounts proportionate anteed steady il me from renewals, posited Insurance Department, pees. Dept. A, 40 Clinton Street, Newark,

TO Market 3A garage door holders, si:

action, quickly installed, inst irage owners builders dealers exclusive territory proposition Stevenson Co., 1118 Packard, Ann

$5 SALE—$5 C with lifetime mmission

renewals New combination life-accident policy Write immediately United Under writer PM-2, Willow Hill, I! SELL Printing: 40% commission daily Lowest prices, with or without posit. Cor right cuts free Inquiry brings pocket out fit Salesmanager, 1522 Wells, VanBuren ig., Chicago

FURNACE Carburetor for any heating fur-

Hartford, Conn. nace or boiler. Eliminate 80% of smoke and ; ; > = soot Reduces coal bill one-third Fasi BIG Money-: alci Make $200 installed and operated We offer you a monthly extra Show new, exclusive line permanent business with a big profit Give coveralls ar S Adver sales experience, reference and territory cov broidered or ast ered when answering. The Campbell-Haus- Outfit free feld Company, Box 9, Harrison, Ohio Dept. A —_— - eo ~ NEW Profit sharing plan—150% protit SELL $75 to $200 weekls Soaps, extracts, toilet electri ity, articles, food products, et« Free samnle tition heci case Experience unnecessary. Carnation low. _ Unusua Co., Dept. 2500, St. Louis, Mo ican Store - —__——_— St., Chica SELL 365 Electric signs 7c apiece. $8.50 “ oe - “ profit every sale Srilliant, blinking colors SPLENDID Sideline Excellent profit Gileo, 217-CA N. Desplaines, Chicago selling to trade finest mplete line vendi machines, et ) ples, sell from catalog PUNCHBOARD Salesmen. $200 weekly Specialty Mfg. Co., B724 N. Racine, Chicag Liberal plan assures sales Latest assort- ments Nothing to carry Full commis- GOLD Leaf Window Letter ind = script sions on repeats. M&L Sales Co., 301 W signs; no experience; 500 profit. Samples Adams, Chicago free Our letter made Hazelhurst $200 “ 7 week. Consolidated, 69-V West Van Buren SALESMEN—Feur $15.00 sales to mer- Chicago chants net you $40.00 daily Sayers Sy tems, 2813 Sheffield. Chicago, II! NEW! r! Make $3.00 an hour daily. rtising Work Suits.’ HELP WANTED Every workmar business prospect Higt grade low-priced coveralls, shop-coat 2- $2.00 AN Hour for special advertising plece overal Fir name and advertise work among local families Exceptional ment woven on back Outfit free John portunity; pay starts immediately. Americar Leeding Co., Dept. PM12, 70 E. 18th, Cl Products Company, 2195 Monmouth, Cin- cago, I innati, Ohio. io fa PACSee ATA OF 4AS8 £2 ee emm 4 Geog eneaboesaesd$s = POPULAR MECHANICS ADVERTISING SECTION

WHY Not sell

us your spare tir ; an hour, $19.70 daily easy full time I duce 12 months guaranteed hos styles, 39 colors for men, women childrer pe cluding latest “‘Silk to the Top’’ ladies’ hy and men’s fancies No capital me rience needed We furnish sa l \ plan. Macochee Hosiery Com P 26012, Cincinnati, Ohio YOU Are invited to re ' home Immense profits | t tableware, etc Write Sprinkle, Plater, 287, Mari ADVERTISING Work—$5 to $20 Everything furnished Write W. M. } 7 New Market, Va MEN—Big money Free ump! Gp Box 471, New York SILVERING Mirror French pla Pp ented process, easi learned I . profits. Plans free. Wear, Excelsior Springs Mo PERMANENT Business your own; 1 and women, earn $55 to $100 weekly perating ur original Specialty Candy Factorie Few dollars starts you home spare time: wa instruct and furnish everything Booklet free Ww Hillyer Ragsdale, Drawer ( East Orange, N. J OBTAIN Employment Get positi t, quickly, anywhere Use clever “Wa ( t Win.”’ One person was ffered “ jobs! Complete methods, 50 cent Mone F promptly returned if wanted New Idea Service, Box 39-1, Station K, New York INFORMATION TECHNICAL Information, anyt! Money ned if we cannot answer mercial Service Co., Dekum Bldg., P Oreg TIME And Labor-Saving hundreds of the in Shop Notes for 1928 l together there are 6,000 sh 4 15 volumes comprising the $4.50 postage prepaid. Send postman when he delivers | Mechanics Co., Room 810 St., Cl go MAILING LISTS 99 GUARANEED Mailing list A rate Reliable Guaranteed rhe t produces business; compiled for p ible business r individual Li every { business r ind kind of any | f le r

where Cc g i atior nr N nal List Broad, Ne N LATE Name Oppor it eek T fresh, active Guaranteed rrect right De Muth Compar Englewood 1,000 1928 RURAL Women name $ Sh green, PM1427 North Penr 1 apolis, Minn.

TYPEWRITERS AND SUPPLIES TYPEWRITERS, all standard makes. $ up. Fully guaranteed Free trial Write for complete Nort hwester illustrated lists Typewriter Exchange, 121 N. Chicago TYPEWRITERS Remingtons, Francisco Av

Factory Rebuilt R Underwoods. New Royal, RB ton and Corona Portables ew Ex lograph”’ Rotary Stencil Duplicator $ Terms Catalog Free Pittsburgh T writer Supply, 945—339 Fifth Ave., I Pa burgh SIMPLEX Typewriters $3-$8; Remir $12.00; catalog 5 Deme 114 For Prov., R. I TYPEWRITERS—AIl wv Ils Dee Ty ikes $6 ft Ful guaranteed Exct Ada, Okla TYPEWRITERS <night 1512 Locust pewriter Motor le St. Loui $3 to Mo

PRINTING, ENGRAVING AND MULT GRA PHING

200 LETTERSHEETS 1100 env $1.00 postpaid J. 3 a», 249 | St New Bedford, Ma 200 LETTERHEADS And 100 ¢ $1.00. 200 letterheads, 84x11. 150 « 2° 00 250 ecards $1.00 Catalog H Print MAKE A Shon Portland, Ind pleasing impression “4 ness cards $1 postpaid. John Poke ton Ave., Chicago.

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$2.00 Intro- ery—47 Ten, in- PS hose etpe- New Park rors al » parts Mation. Week! Runion, Pop- Pat- mense prings, nen and erating Lories,”’ me; we Booklet r 350, Popular Ontario POPULAR ‘VELOPES, 100 Business size let- printed, $1.00 Crane, 1111 E. Kansas City, _Mo. a TING Presses, type, supplies. List Bargains. Geo. Foster, 4342 bey, Chicago. iE RMILL Printed social stationery; 0 ets, 100 envelopes, $1.00 delivered. W n Press, East Orange, N. J i NESS Stationery: 5m letterheads, $12 m bill heads, $11.25; 5m_state- 4 $10.00; 5m 6% envelopes, $10.00. Pr of all kinds. Write for samples. ( il Printing Co., Allendale, 8S. C. CH, Letterheads, envelopes, cards, ¢ Sherman, Printer, Merriam, Kans. a. TE RHEz ADS $5.50 Thousand; envel- ope 250; circulars colored bond, $3.00; - rds, folders, books, publications. Low pr superior work. Battlefield Press, Get rg, Penna. Free battlefield souvenir. BOND Letterheads, cards, envelopes, ‘ $2.00 each postpaid. Earl Kelley, Sw Vt PARTICULAR? ‘“Neargravure” t s stationery. "Nuf sed. Samples, t appreciated); state business. days, Knox, Ind. “MON UOGRAM, Boxes stationery $20. processes prices Solli- ( me cards $1. P. Laflin, Coshocton, Ohi . “FINE Printing—Low prices warge mod- ern plant (thirty employes) in small town, low operation cost. Special prices on sta- thoner circulars, pamphlets, ruled forms, utalog large or small orders Write for samples and prices. Shenandoah Publishing House, Inc., Box 1040, Strasburg, Va ~All) LETTERHEADS 8%x1l and 250 En- ve $3.00 cash Print anything lowest pric Catalog free. National Printing, Goshen, Ind. LETTERHEADS and 100 Envelopes, $ postpaid, Oberman Co., Box 1042, Chicago ELEGANT Envelope slips. $5.00; S%x8% circulars, $10.00 Folders, booklets, catalogs lowest prices. Samples. Goodprint, Ha nburg, Va z LETTERHEADS And 100° envelopes $ elivered. Cards, labels, circulars, cat- gs, et Thiacomas, Martinsburg, W. Va. NEOTYPED Form-letters on bond with printed letterhead: $2.75, 500; $4.25, 1,000 Printing, multigraphing, low prices. Sam- ples free. Boggs, Box 826-P, Columbus, a) ~PHILATELIC Gossip — large 52-page weekly, three months with premium 25c. G ip Print, Holton, Kans . ENVELOPES, White (printed) 6% 241b., $8.50. We print anything. Lawrence Envelope Co., 700 So. Kedzie, Chicago. 250 BOND Letterheads, Envelopes, Bill- heads Cords $1.35 each. Economic Press, UALITY Printing! Reasonable Prices! Send for Free Standardized samples and Prices Folders Circulars Catalogs our specialty. Earnest Fantus, 525 South Dear- born. Chicago MULTIGRAPHING Business correspond- ence two dollars thousand Hammermill etterneads, four dollars: inexpensive quality, three dollars Miscellaneous printing. May- era Corporation, Monmouth, Il VE Print stationery, booklets, catalogs, ilar Samples. Commercial Press, Ba- t a, Ohie SAMPLES 3 Raised | letter printing with spe- prices free. LaClyde Service, Westfield, 000 6% Envelopes printed $1.85. Free les Spors Printery, Lesueur Center, BUSINESS Cards 98c. Other print- P Samples free Hanzer’s, )S. Cleveland, Philadelphia, Pa 0 BOND Letterheads, envelopes, cards, 5 each. Quality, satisfaction, samples. H. Curtis, 811 Harrigan, Kalamazoo, Mich. RUBBER STAMPS RUBBER Stamps! Name, es 25¢; three lines, 35¢. DeLuxe Stamp orks, B572M, Auburn, Nebr. PRINTING. OUTFITS AND SUPPLIES PRINTING Presses, type, etc. List free. Pox 676, Wichita, Kans PRE-USED Printing presses. List for 2c stamp. Richland, Pa. reasonable, address, two Type sup- Popular Bar- MECHANICS ADVERTISING PRINT Your own stationery, cards, book- plate. Christmas cards, circulars, pamphlets, etc.; complete outfits, larger, $11. $29 rotary $149. Print for others. Easy and interesting rules sent. Write for catalog presses, type, paper, etc. Kelsey Company, K-11, Meriden, Conn. — “PRINTING Outtits—Presses, type sup- plies, type novelties. Send stamp for cata- logue. Model Press, York, Penna. DUPLICATORS AND DEVICES YOU can make 50 to 100 copies of a letter, notice, etc., at a cost of three cents on a Heyer Quality Duplicator. Write for free trial offer. The Heyer pusticater Co., 909 Jackson Blvd.. Chicago, ADDING aREKINES NEW $3.50 Automatic adding machine. Adds, subtracts, multiplies, absolutely accu- rate. Capacity $999,999.99. Fully guar- anteed. 75,000 pleased users. Makes add- ing easy, positive, quick. Eliminates mis- takes. Saves time. Postpaid $3.50. Bas- sett Co., 1458-X, Hollywood Ave., Chicago. FOR THE HOME GRANDFATHER’S Clock Works. $5.00. Build your own case; instructions free; make good profits selling your friends. Clock works with chimes for old or new cases. Write for full particulars. Clock Co., Ruff- ner St., Philadelphia CEDAR chests only $11.65—‘'Red-i-Kut’”’ complete with rich copper trim—you as- semble and save half—send for pictures. — Furniture Company, Guttenberg, wa ~ LACQt CER Your own furniture, save money Hand sprayer, $2 e Ferretine, 226 Pine, Chicago. “WALNUT Boudoir clocks $3.50- Guar- anteed timekeepers Box 221, Painesville, Ohio. BOATS AND LAUNCHES BOATS More popular than ever; be up to date, build your own boat during your spare time this winter using our knockdown ma- terials and save money. 55 new designs. Send 25c for 1929 catalog. Brooks Boat Co., Ine., Rust Saginaw, Mich MAKE lo hr Whoat; bluep! c. Wee- sho-Uco, 31s t Office, Detroit, Mi h. NEW Boat Book—Revised edition of Popu- lar Mechanics boat building book contains valuable new information on building row- boats, speed boats and portable folding boats for tourists for use with out-board motor as well as other valuable articles on canoes, motor and sailing craft of various types. In addition a valuable book on Outdoor Sports the Year "Round. Both for 1.98. Pay postman price plus postage when he delivers package. Popular Mechanics Company, Room 810, 200 E. Ontario St., Chicago, Tl. GUNS, SPORTING GOODS, ETC. HUNTERS And trappers: See and try the ‘“‘Screw-Bug,’’ a mechanical ferret for routing rabbits, skunk and other burrowing allowing five animals Sold direct by mail, days’ trial with an absolute money back guarantee. Price $4.00 each with order, or collect plus postage Free circulars The Grabow Co., Dept. A, Franklin Square, L 1., New York SHOTGUNS On monthly payments; all gauges; double barrel hammerless; full price $25; single barrel hammer guns $10; Ameri- can manufacture known for 50 years Write for catalog Franklin Sporting Goods, Am- pere, N. ~KRAG Rifles—$10.50; Sprineflelds, : Luger carbine stocks, $1.50; exercisers, $1.20 Write for complete catalog Hudson Sport- ing Goods Co., W54 Warren St., New York. ARCHERY BOWS—Arrows, and all raw materials. Send for complete catalog. Stemmler Co., Queens Village, N. Y¥ FIELD GLASSES. TELESCOPES AND MICROSCOPES C-FAR Field glasses $2. Consists of two rimmed lenses in neat leather case, slips into vest pocket, weighs only 1% ounces. Gives 6 diameters magnification. Money back if not satisfied. Send $2 today to Buffalo Optical Co., Dept. PM-7, 574 Main St., Buffalo, N “VSED Fieldglasses; $2 to $75." J. Loring, Dept. J, O-we-go, N. Y. Alden SECTION “I un FOR SMOKERS AUTOMATIC Cigarette making machines Rolls, glues 50 for 10 cents; illustrated folder. Postpaid $2.50. For home use Automatic Cigarette Machine Works, 6247-51 Broadway, Chicago. SEND lic Silver or stamps, for sample package 20 finest quality cigarettes Large tin special smoking tobacco sent for 1 Direct -to- smoker French Tobacco Com- pany, Dept. 65, Statesville, N. C. RAZORS AND BLADES SHARPEN Razor blades. Build a business for yourself. Easy, light work. - Opportuni- ties everywhere. Little experience necessary Our machines produce perfect work, hol- low-grinding, honing and _ stropping all blades. Established 1916. Write for free catalog. Velvet Edger Mfg. Co., 6001 Gram ercy, Los Angeles, Calif ANTIQUES, WAR RELICS AND INDIAN Gooos INDIAN Stone relics. 28-page catalog 5 Grutzmacher, Mukwonago, Wis. GENUINE Sioux Indian costumes and beadwork. Buying direct from Indian. Prices reasonable. Free price list Lyon Curio Store, Clinton, Nebr SEND Se For fine new list Yndian relics antique firearms. F. E. Ellis, Webster Groves, Mo FOR Dens. Relics and medals from Europe’ s battlefields. Illustrated catalog te International, 885 Flatbush Ave., Bro lyn, PHONOGRAPHS AND RECORDS BUILD Your own photongraph Parts catalog and instructions to build new horn mailed for 10« American Phonograph Co 4116 West 24th Place, Chicago. MUSIC AND MUSICAL INSTRUMENTS SONGWRITERS: Get in touch with me at once. Bell, D-6, 4718 So. Broadway, St Louis, Mo “NEW Patented bow and instructions for playing music on a « n hand-saw. Post pa aid $1.08 H. O. Nichols, Lowell, Ind SONG-POEM Writer Address Monarch 226 W. 55th Dest 204, New York SONG Poem Mane. ul’” proposition Hibbeler, D1 tone, Chicago “MUSICAL Accessories SIT Ruekle Si Indianapolis, Ind. Get circulars, dis nt SONGWRITERS, “Substantial” “Advance royalties are paid on publishable work Anyone having original ideas for songs may submit poems for examination and free ad vice Walter Newcomer, 1674 Broadway New York SONGWRITERS: Subr ng or poem Same _ returned ately if not accepted Chester Escher, 1547 Broadwa) New York City POEMS Wanted, 50-50 plan. Great Fastern Song Bureau, Dept. 27, Thomaston Me FREE— ‘Seng Writers Guide,” Beaver 1257 Elm, Green Bay, Wis SONG Writers: Send for our ‘‘Publish- ing Agreement."’ McKinley Music Printers, 1501 E. 55th St., Chicago. “SONG Poe solicited. A different pror ositior Richard Broughton, Sioux Falls, S. Dak ~ VIOLINS, Deep, meliow, soulful—on credit Easy terms for wonderful instrument. Get details today Gustav F. Henning, 302 University Building, Seattle, Wash ~CORNETISTS—Trombonists—Sa xophonists —Clarinetists. Get ‘‘Free Pointers." Name instrument. Virtuosi School, Buffalo, N. Y “PLAY Piano by Ear. A Sound System Rooklet free. Boucher’s Harmony Studio, Ottawa, Can. _ 7 “SONG Poem W Ts, Write Sequoia Sor writers’ Service, Sherman Branch, Los An geles. Calif a ~*BANJOS” Should interest all musicians on account of the popularity of the Banjo, as it easily increases a Player's income Illus. Catalog of 48 pages free. The Beacon Banjo me Inc., Groton, Conn., U A I ANT Song Poems 3544 ‘X Racine. Chicago. _ “MUSIC Composed” to_ words Bauer Bros. (formerly of Sousa’s Band), Oshkosh Casper Nathan Wis. POPTILAR MRERCHANICCAR ANnvrorremnnr errcmmnar fie

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76 POPULAR MECHANICS ADVERTISING WRITE Songs Big money and reputa- tion Write for information J. Gordon Pub. ¢ 201 N loyne Ave Chicag PATENT ATTORNEYS PATENTS—Write for our fr book How to Obtain a ter and Record of Inventi Blank Send 1 or sketch of inventior for inspection and in tions free Terr reasonable See advertisement on page 156 and 157 Victor J. Evans & Co 134 Ninth, Washingtor py. ¢ TIME i page H nd 155 Registered + Patent DC ~ LACEY'S Patent free See ad pag INVENTOR’S mation, free Fr Attorne Engineer New Yor “PATENTS Procured reasonable ra with t to pay Sales negotiated Staff of regi ittorne ind engineers A complete ervice for inventor Write for particulars Invent Service Bureau, Union Trust Bids Washington, D. ¢ INVENTORS—Why pay more? HH. M *laisted registered patent attorn ; thirt yea ‘ e patent and=trade-marl i x Bivd St. Lou M PALI ts} instru n I r patent tice ex iner Moderate te Booklet A rt Ja 27 Barrister Bldg Washi DD. ¢ PERCY Ss WEBSTER y 4 Saving i L ] Stockton, Calif Patent 4 h et f t INVENTORS: Ser for booklet telli how t ite nd sell r i ntior a ‘ cost RK Burch, Patent Lawyer, 900 I St.. W D. ¢ “PATENTS P ice er sonal f ] t er Hig referer M fee Se ketcl r model for actual search and advice George P. Ki el, Master Patent I i-I Legal B Wa gton, D. C ~INVENTOR'S Advisor with ical movemer ent free Labir TI ark row, New York ~ JOHN PATTEN DUFFIE, Registe pat- ent att ‘ ictor Bldg Washing Db Cc Reasonable rate Advice free Booklet ~ PATENTS. Prompt personal service Write for informatior Albert E. Dieterict Registered ten Lawyer 621% QOura Bldg., Washington, D. C “PATENIS—Write tor tree instruction Send drawing or model for examinati Carl Miller Re istere l Pa t t At rne for er Patent Office examiner 259 McGill Bldg Washingt 2. © ~ INVENTORS: Send sketch or model for advice and exact ost f atent Ask for to Obtain a Patent.”’ w should know Es- tablished years. Highest refer- ences. Prom Reasonable charges Chandlee & Chandlee, 414 Seventh, Wash- ington, D. C our Free book: ‘‘How Tells what every i: PATENTS Procured Trade Marks Re istered \ Comprehensive, experienced, prompt service wr the protection and de- velopment of your ideas Preliminary ad- vice y furnished thout « e. Bool let of information and fe rm Idea free request Irving L. McCathrar 200 Owen Biidg., Washington, D. C., or 41-R Par Row, New York PATENTS, Trade-Marks, Designs. This firm has 27 years’ experience and gives ex pert personal service at reasonable rates. We properly protect your invention. Write for free information and exact cost of procuring patent before proceeding John B. Thomas Co.. 902 F St N. W.. Washington. D ¢ ADVICE Free! Patents procured—Rea- sonable—efficient Service 25 years’ expe rience Chester W. Brown, Registered Pat ent Attorney, 510 Van Buren Street, Chi- ca PATENTS Sooklet free Highest refer- ence Rest results Promptness assured Send model or drawing for preliminary ex- amination Watson E. C an, Patent Washingt » = * Lawyer, 724 Ninth St PATENTS, Trade-marks, Copyrights. Re- liable services by an experienced practi tioner devotir personal attention t¢ e } case Inquiries invited References fur nished R P. Fishburne, Patent Lawyer, §25-A McGill Bldg., Washington, D. C SI har for disclosing MONROE E. MILLER, Ouray Bldg Washington, D. C Patent Lawyer; Me- ehanical, Electrical Expert Booklet and Priority Record blank gratis St.LL Your invention before patenting Write for free particulars ’. T. Green, 801 Baltic Bldg., Washington, D. C. ESTABLISHED 1864 Milo D. Stevens Company Free Booklet Patents Track Mark Copyrights Offices, Monadnock Chicago; Barrister Building, Wash- dD. C INVENTORS—Write for our Guide Book, ‘“‘How to Get Your Patent,”’ and Evidence of Invention Blank Send model or sketch o your invention for our prompt examination and instructions free Randolph & Co., Dept. 430. Washington, D. C I tell Free , UNPATENTED Ideas can be sold. you how and help you make particulars (Copyrighted) Greene, 806 Baltic Suilding, dD. C. Write W Washington and Allwine, 221 LANCASTEI Ouray Bldg Washington, D. C “Originators of the Form Evidence of Conception.’ Be fore disclosing your invention to anyone send for blank form to be signed and wit nessed. Form and patent information bul- letin free. FOR INVENTORS PATENTS If you have an invention which you wish to patent you can write fully and freely to Munn & Co., for advice in regard to the best way of obtaining pro- tection Please send sketches, or a model of your invention and a description of the levice, explaining its operation All com- I ations are strictly confidential Our Hand-Book on Patents is sent free on re- quest This explains our methods, terms, e regard to Patents, Trade Marks, Foreign Patents, etc “Scientific Amer- ican’’ contains Patent Office Notes, De- sions of interest to inventors and par- ticulars o Munn & recently Company, patented inventions Solicitors of Patents, 1523 Scientifie American Building, 24 W 10th St., New York City: 524 Scientific American Bldg., Washington, D. C 131 Tower Bldg., Chi Ill 666 Hobart Bldg., San Francisco, Calif.; 521 Van Nuys Blds., Los Angeles, Calif INVENTIONS—Write for our free book ‘‘How to Obtain a Patent’’ and Record of Invention Blank Send model or sketch of inventions for inspection and _ instructior free. Terms reasonable See advertisement n p 156 and 157. Victor J. Evans & Co Nint} Washington, D. C TIME Counts in applying for patents. See I ¢ 154 and 155 Clarence A. O’Brien Registered Patent Attorney, Washington, dD ¢ LACEY'S Patent Sense. Valuable book free See ad page 159 INVENTIONS Wanted. If vou have pat ented r unpatented idea write Chicago Metal Novelty Co., 8390 South Chicago Ave., Chicago INVENTIONS Developed and cor ercial- ized Frank G. Buffum Mfg. Co., Louis iana, Mo I SELL Patent A nationally respected ervice for the inventor Charles A. Scott, M Garson Ave., Rochester, N. Y INVENTIONS Wanted—-Patented unpat ented If you have an idea for sale, write Hartley, Box 928, Bangor, Me INVENTORS—Cash in on your inventi now! Don’t delay the sale any longer! Send for a free copy of ovr specially pre- pared booklet, ‘Turn Your Patent Into Money,”” today! It contains helpful infor- mation for all inventors M Rund Mer. Classified Advertising Popular Me chani Magazine, 200 E. Ontario St., Chi- ca . WE Sell patents by calling personally on manufacturers any part United States. Write for ter Birk & Green, 300 So. Halsted St Chicago “PROFIT On your patent. 2230 page book $2 on approval Tells how to profitably sell patents, new ideas. Patent Enterprises, Cal- ifornia Bldg., Los Angeles. Calif GET your wn patents Legal blanks complete instructions $1 Cutting Sens Camnbell Call UNPATENTED Teas can he sold T tell you how and help vou make the sale. Free particulars (Conyrichted). Write WT Greene, 807 Baltic Bldg., Washington, D. C POPULAR MECHANICS ADVERTISING SECTION WANTED—Patented device to manufacture on Cinnati Automatic Machine Ohio INVENTORS Uhiversal - ain 900 mechanical m t tions Tells how Suggests new your attorney e (revised Write to B. er, - ill Bidg., W SELL Your’ invention Write for free particulars 802 Baltic Bldg., Washingt medical or royalty basi Co., editi D Dieterich, 621 Ouray Big tegister Cir Educat vements ; to obt ideas E r and avoid nm) $1.t P. Fish 1 Patent ashingt before pa W. T. Gre n, D. ¢ PATENTS FOR COMBINATION Cookie ghnu proven practical 150 in use Rare tunity for oven and doughnut kettle facturer Humphreys, 815 Bayswater Burlingame, Calif OUTRIGHT — Or I Indi es ffice and r Ire loor bell indi he upant ! e, or set at any other desired i Paul Kosecki, 6627 23rd Av Ker i CASH Or 1 alt Pate fi display device Milwaukee, Wis OUTRIGHT—Wonderful lapsible shoe hiner E. J Main St Tu Ariz ~ OUTRIGHT Morning Dew Okla ~OUTRIGHT—Li D ices for shaft and cylinders f mar engir new mechanics’ horizor r Harvey Wescott, 132% N St B ee ~ OUTRIGHT Or Patent metal cigarette exti ra { i eal bu t it ! ashe ifa t re Richard B. Mattson, B r, Mict 4 COLLECTION of fety locks for sale on r l i Cc write to Giuseppe I 2550 Ave Up, |} ( 0 ~ BABY f er of iw tachable high chair I en sells lik } »® M Jaffe, Hotel Strand, } H ( ~ METATI Safet el vents ft er i I { wWT1 ¢ erli Ave I) Mi COST Mar t re A Mel ( Ww ~ TIME ¢ . for pat pag 1>4 ‘ 4 oO Re tered Pa Att Was! Dp. ~ SWIVEL For all ir ling tele hone € ver twisting and we Patented R. B. ¢ 819 ¢ St Topel Ka FOR Sale—Fisking b Send for cop Jose 1. S 730 2 New Yorl LATEST Nove \t nee airplane Patent applied f Addr 28, Whitesboro, N. J ~ OUTRIGHT — Seif 1 ifter r home ind } P. Cor 67th St Rrooklyn, N. ¥ ~ OUTRIGHT, A é 7 Hubbard 1382 Fernw is cl Ohio CORN Husker tright royalty Something new Earl MecNee Ww Ind OUTRIGHT Or 1 Ar for manufacturer Ex e to manufacture Ty. g 1 { i Henr Starker 2 Vv 1 Place Cit N J EXTENSION Holder—B insta gaged or released. I to wed Manufacturi: hea Cl W. Smi Tame St Green Island N ~ OUTRIGHT Or royalt Ss grit ’ §.-Car patent ma i fect! engages and diser f hie ie hand operation J Ant Ne trand, Nebr PATENT ied for. One-half ro\ ilty Aut ! ile Mi l ne ring Walter S. Shallenberger, 208 M« Ave., Charleroi, Pa SECTION SALE Morning Dew Manufacturing health

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health Cin nnati reene rd easier, OUR lle POPULAR ORIOUS Small, wood, wire, house- extremely useful, valid patents 20 Magnolia St., Oakland, Calif “TABLE Measuring and sacking can ercial and household use Patent |. B. Fisher, 208 South Main St., Kans i LES I bg RERS Or promoters—First € S. and Canada rights on ict Ob. Ss. No 533,483 Great NT— Fortune in stop-direction signal jsible all around. Sale or royalty. 6 Rush St., Chicago (1GHT— Method of mixing water and Engines got 63 miles per gallon. k, 43 Benefit St., Ashtabula, Ohio. Sale outright or on royalty, patent power generator For particulars G. Silvestrin, 320 Spofford, Port Ont Can KIGHT—Simple mechanical dandelion destroys plant permanently with Louie Mauch, 846 Corona St., { pSTORM Hat retainer. E. 102, Cleveland, Ohio. RIGHT Reasonable pipe joint for bathtubs, basins, sinks. Patented | States and Canada. Robert Dawson, n, N. J 1R Sale—Patent on dirigible head lights mobiles and trucks, very simple and also cheap to manufacture, a system y will want Sell for cash and roy- Arnold E. Daly, Mather, Manitoba TENT Pending, attachment for deep id and power pumps; pump runs one- smoother, cheaper, inexpensive, demand unlimited Samuel Mc- 00 25th St., N. W., Canton, Ohio. patent can be turned into quickly! One inventor sold his Louis Pich- a cost of only $3.50 Send to- 1 free copy of our booklet ‘Turn y Patent Into Money.’’ M. L. Rund, M Classified Advertising, Popular Me- Magazine, 200 E. Ontario St., Chi- SURVEYING INSTRUMENTS E On transits and levels Rebuilt nt All kinds and makes Cash Write today for descriptive list Warren-Knight Co (Man mtectuvers Sterling’’ Transits and Levels) 136 N. St Philadelphia LARGEST Stock of new and used survey- ments in the country direct from Satisfaction guaranteeed or money ed Also farm levels Wissler, 619 idway, St. Louis, Mo. MODELS AND MODEL SUPPLIES HIP Model Fittings: oklet 1E Counts 2 ee See 34 and 15 Clarence A. O’Brien, Patent Attorney Washingtcn, ODEL Steam engines and boilers for » boat Six cylinder radial engines el airplanes New catalog lic. Model e Shop, 212 Price St., Rahway, N PECIAL Machine builders, tool and die inventors’ models kind Dept. L ne Corporation, ile Aves production work Quality Hardware Ravenswood and Chicago, Tl. Our experience be your guide. Mod- t are models; tools and equipment n manfg Patterns of all types; ring in all branches Satisfaction ed. United Machinery Company, Cin- 0.. a. & VE make working models for inventors experimental work and carry a com- tock of brass gears and model sup- Send for catalogue The Pierce | Works, Tinley Park, 111 MECHANICS ADVERTISING AGENCIES WANTED LISTEN! Manufacturers, m iil order houses, I am interested in latest noveltic Carlos A. Suarez, Villegas Havana, Cuba FOOD Products, spices, fruit syrups, san- itary rubber goods. Send me your proposi- tion Excellent market. Carl A. Suarez, Villegas 3, Havana, Cuba. MANUFACTURING CONTRACT Manufacturing of metal parts, ideas developed, metal stampings, models, dies and screw machine product Schroer Manufacturing Co., 2221 Campbell St., Kansas City, Mo. ACME Model Works, 200 North Jefferson St., Chicago, Ill.—Working models, mechan- ical, electrical and optical apparatus designed and built. Screw-machine work. Stamping MANUFACTURING Models, dies, stamp- ings, brass work, one or thousands, Cir- cular free. Baum’s Metal Specialties, Kansas City, Mo SPECIAL Machinery or parts, dies, tools, metal specialties, models, special gears, stock gears and model supplies Send for Catalogue. The Pierce Model Works, Tinley Park, Tl. ECONOMICAL Manufa turing from sheet, bar, wire or tubing. Models, dies, speciai machinery. Swanberg, 5124 N. Kildare Ave., a 1icago “WIRE goods made to order cx ley Mfg Co., 530 N. Western Ave., licago. MACHINERY, TOOLS AND SUPPLIES NO. 1 Brown & Sharpe universal miller with dividing head, $175.00; 12’’x5’ Barnes engine lathe 5.00; No. 60 Health grinder, $275.00; 24° " Barker back geared crank shaper, $400.00; 16°" Walentt shaper, $145.00; 20’’x10" Flather quick change lathe, $375.00; 24” Hamilton drill press, complete, $135.00; Quincy air compressor with tank and hose $65.00; 10°" bench drill press, $19.00. Terms to suit Write for z winnati Ma- chinery & Supply Co. Second St Cincinnati, Ohi ~ COMBINATION Bench saw only Runs with % horse power motor Will rip S980 and cros Consists of 6 inch saw, grind- ing, dril polishing, sa tt its 100 other real Washir € - tors, $5.50, % H. P. $15.75 $13.95, electric grinders $7.55 bargain bulletin No. ¢ Washington St., Chicago, Il ~~ HEAVY Duty portable electri jrilis. commas be stalled by two men; %°’, $22 $18.00; %°", $64.00; %"’, $78.00 Ten Bucs down balance easy terms Here is something new, just out Refillable pencil and spark plug testers combined. Send $1.00 for sample today General Distributing Company, Duluth, Misr “WOODWORKERS, New accessory for cir- cular saw Makes int } Guaranteed. Price irs 2 layton’s Works! 1 Mi “AMERICAN Steel split pulles plete with bushings, any standard size. 50% di count from list price. Wise, wine or phone totwinik Brothers, Inc.,”’ 67 New Haven, Conn CONCRETE Building t k machines and molds Easy payment Catalog free. Con- crete Machine Co., 5 North Main St., St Louis, Mo. COMP RFE 2SSORS, Twin cylinder, for small tire shops Duco spraying J. Trockman & Sons, Inc., 110-112 Lincoln Ave., Evansville, Ind. Water St., START business ¢ your own, small in- vestment required loing nickel, copper and silver plating This work in big d Information free Electro Platers Supply Co., 547 Considine Ave., Cincinnati, Ohi ENGINES. MOTORS AND DYNAMOS ADEYES—%” 3-16" $3.50 hundred, ir ae 18e dozen. C. Libby, Tucka- Send Dime for f A. J. Fisher, 1002 Etowah Ave., Oak, Mich : E Modelmaker, a macazine for all in- ted in making working models, boats, Sample 10c Mode!lmaker, 122 Lib- St New York MODEL And experimental work at lowest Wagar Model & Machine Works, 115 linton 8t., Chicago, EXCEPTIONAL Offer, absolutely new mo- tors, 2 year factory guarantee; latest tyne % regular cost; shp., $20.00; %4hp $9.75; %4hp. double she ft grinders complete, $14.50 Motors all a. 110% 60 cycle, 1 phase 1740 R.P.M., constant duty, plug and 9 ft cord. For shop or home use. Shipped F.0.B Chicago, cash with order Maynard Miller 518 No. . Sawyer _ Ave., Chicago, Ill TIME Counts in applying for patents. See pages 154 and 155 Clarence A. O'Brien Registered Patent Attorney, Washington, » © SECTION 77 NEW %\% Horse, 110 volt, 60 eycl speed, alternating motors with rd pulley and two-year factory guarantes each % horse 110-220 volt l,o0 speed Wagner repulsion induction alternating mo- 22. it ] sizes alternating and eal Surplus Company Chica bearing generators, It lighting plants $1 hp 32 volt motors $° General fata repulsion, a. u » All brand new Write for be ‘ Do not buy consult u fir yer Distributing Company, Du- luth, Minn FOR Sale: %& hp. motors, 110 volt, 1.750 R.P.M., 60 cycle alterr ting current Slightly used Good = runni niditior $5.00 each, while they last. Cas h with order The Maytag-Chicago Co., 7 W. Madison St., Chicago, Ill EDISON And Graphophone electri uni- versal motors with speed governor and idler $5.00 plus express on 10 Ibs. Geo. Schulz, Calumet, Mich NEW *2Hp. Westing! $26.00 4hp., $6.50; for direct current 0 +4 volt motors with emery wheel, buffer and drill chuck $6.50 8-day time switches, $7.50 Many other bargains in larger motors, also generators Queen City Electric Co., 1736 Grand Ave., Chicago, Il AUTO Engines make excellent pe in the shop, mine, mill or farm I We make the Fit any make vertisement b \ GOVE RNORS For » engines when used for power plants Circular Candee-Smith Governor Co., 215 W. Manchester Ave Los Angeles, Springville, N. Y or St. Cath erines, Ont SARGAINS—Motors, machiner wash. $5.55 %hp., $17.50; electric tric grinders, $7.45; farm ; generator $15.95; ele ner $295 100 othet bar bargain bulletin No. 636 , 627 Washington St., Chicago DAM Engines—One H. P $18.00 $12 f James Chambless, sessemer Ala SE W Motor General — tri s hp $9.50; % hp., $26; 1 hy $ 50 Mail $ will ship C. O. D. ar ere. Motor Spe- cielties Co., Crafton, Penna MAKE your own—half and one horse power electric motors. A. C. Induction ‘ tor model shows winding connections | 1 sight Quic easy way Gaines Bros., Box $81. Ga nesville “ELECTRIC Mot new Money back 1 H.P. $16.00, 1 } $ ) H.P. $40.00 Others to 10 H.P. Tell us your motor problems Ter Srothers Motor Co., One Martin Ave., Giendale, Long I land, N. Y BENDING MACHINES THB Famou Hossfeld ‘‘Wrenchles Universal Iron Bender the last word in Lending machines jends metal cold or hot, into most any conceivable shape, in cluding Bye Bolts and Automobile Spring Eyes. fends up to 1” bars or l's” 7 i col Thousands in use by all classes of trade, from the smallest oeee to the largest railway systems Write f circular and prices Hossfeld Mfg. Ce ‘Winon 1, Minn BLACKSMITHS BE a Master Mechanic Blacksmith and Expert Tool Maker and Dresser with col- ored tempering charts. Price $1.00. Val- ible samples free. W. M. Toy, Sidney, or WANTED—MISCELLANEOUS MAIL Us your discarded jewelry, gold, crowns an i bridge watches diamond silver, pl n Money promptly m uiled. ( ls returned ff offer refused United States Smelting Works (The Old Reliab le), Dent. 71 Chicago Tit NDRI DS Of people have sent their old gold r, platinum jewelry lental work to me te gran irs toda Highest prices paid. Satisfaction guaranteed or good returned. F. Polcer, 2408 South Cicero Ave Cicero, Mm FOR SALE—MISCELLANEOUS ADDRESSOGRAPHS. Letter folders, mul- tigraphs, envelope sealers, duplicators, less than half price Guaranteed Pruitt Co., 117 No. Market, Chicago. POPULAR MECHANICS ADVERTISING SECTION 79

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78 POPULAR MECHANICS ADVERTISING SECTION

DON'T 8S 1 ashes! Save coal More HUNDRI Do Hunting hounds cheap. Sup- MIRRORS Resilvered at home. (Co heat ‘ an r 1 in ented n ealed a a pli Catalog Kaskennel K-62 errick 5 cents per square foot; you charge in for } ec, I ir or i y Ill Immense profits plating autoparts, refle ! install + your Id . ST Lt ‘RN ARD Pups pedigreed, prize tableware, stoves, refinishing metalwar ! i ictions for only $1.00. I x winning ck. Melvin O. Brown, Russell, Outfits furnished Details free Write 4, Cincinnati, Ohio Iowa Sprinkle, Plater, 288, Marion, Ind FOR The Home Add conveniences v4 HIGH-CLASS CGoonhounds and combina- YOUR Favorite” magazines, sul ed your e at slight cost Cozy breakfast tion d also puppies Honest dealing through us cost less Lists free P r nook fortable seat bookeast mantel No Sunday visiting. Sam. Levers, Wooster, Publications, 9416a 115th St., Rict i hel thes chut¢ linen closet or any Ohio Hill, N. Y , sect atule it eature Witt : f rag fol pcs ther a a an By » RAISE Guinea pigs; easy to raise; little ARE You old at fort See our Wi ee Me , sr ; Reet aie i" B : ~ ace required; ver profitable. Particulars tisement on page 44 of this issue. The ‘opul hanics k entitle oul ven ind booklet how to raise free. Cavies Dis tro Thermal Company, 2112 Morri : ‘ficult hes Mens ry a ae tributing Co., 3102 ©. C. Station, Kansas Steubenville, Ohio wo d uty «whatsoever wee oe Cit lo WOOD For nu gz toys sen ithe aes coal xk and when postman I I r making toy _ Send $ ? lelivers it pay him the price $2.50 and few GOLD Fish—imported Japanese fish samples. E. Brumbaugh, Suncrest, W. Vq sents postage. Popular Mechanics Press Artistic aquariums, aquatic plants; inter- ‘ARTOONIST: Sell your dra . 2 “DO Motadin a hoon esting circulars free. Pioneer Aquarium Proven plan. Castle Studios, Indeper K 200 +I oO rio St Chicago. I Shop Wis Mo FARMS AND FARM LANDS HUNTING Hounds cheap; trial. Litera- PANAMA Hat from Panama. The » ACRE Orange g . % Sauers, Fort ture free A7, Dizie Kennels, Herrick, Ill thing different’’ for Xmas Real Pier i FOR Sale Minks, squirrels, raccoons, woven fiber Only $4 50, postage paid. Give CALIFORNIA, 2 Aer me homesites foxes, ferrets, muskrats, ginseng, rabbits, size L 8. Dennis, Box 431, Balboa, « on paved street j town of 40,000 skunks, wolf pups, opossums. B. Tippman, Zone, Panama people, east of Los Angeles, with 4-room | Caledonia, Minr TIME Counts in applying for patents. § bunga ilt t order with bath gas, pages 154 and 155 Clarence A. O'R electricit ind water 1,000 bird poultry PERSONAL Registered Patent Attorney, Washi: house and 2-car garage all for $4,800 D. Cc rerms $1,200 down, balance like rent. Send — entenaen ype Home treatment for pile MACHINE Big money maker embr for free illustrated b let J B. Roof, Rik yurself of this horrible, painful ailment name initials on handkerchief et I r rated Ow rs 708 Quinby Bldg., oy it con m-sense way without ointment ple free Particulars Jed Company | Angel Calif yw other drug Send $1.00 now for full Broadwa New York City VITENTION! Get acquainted ish for | Prepaid treatment L. W. Hudson, 1439 GOLD, Silver, copper, lead, zine or your | rty, far hotel or retail store, | Hast 7th, Plainfield, N. J each. Buskett, Joplin, M no matter where ited, confidential service OCCULTISM, Yoga, magic incense. Cat TEAR Gas revolver, fountain per Hayes Business Age Cincinnati, Ohi slog 10 Hindu Publisher Garrick Bldg., makes them helpl Non-injuriou . FOUR Hundred e tidewater ninsula (hicag Ferretine, 226 Pine, Chicago f I ed r'w resice H FREE Cont Expert playir ard FLYING Squ Pet ipr } eese raised thout f lir Sports Geni scier honest Grad Yarbroug! } e novel . a pair xpr G I rM r, Va General Deliver Mayw | fe leliver cua ‘ Wildw GET Quick is! i for r property ARE You ld at forty See our iver Farm, W iville, Tex het D fre Write Fisher | tisement on page 44 of this issue. The Elec- PATENTED Clini removers at Aue fl ibal. Mo ro Thermal ¢ par 2112 Morri Ave price Write for free ir Gust ( LAND Sa $ \ $5 ntl buys 40 Steubenville, Ot ‘ r 1 McPherson, Ott ‘ lowa = thern M iri. Price $200, Send MEN—A e, healthy mplexion ELECTRIC Air exper for list. Box 22-N, Kirkwood, M ists you Sunine Tan’’ gives this effect | s9¢- Nelson. 1709 Brook Ka HOIC! M I Itasca dence’ ee ree | oie ( ( in site intrap ( sca reagent Manhatt rat 25 3d : Park finnesota. Tet Write | Ave. New ¥ “4 oe ARTIFICIAL Flowers, how t k G BE. ( nn, 1 i Searl D Moine . : , ; pur . milliner tage pageantr I FREI Va e book telling the uses of door decor ‘ auto 5 - roots’ and her Box 29, Station L, New lispla wind ons md . SMALL Fit and =poultry far near York instructions in Hand k for W Also I Angele Ten years to pay Send for INGROWING Nai rrected without knife nstructions for ea te tal a free il trated klet Fontana Farms I a: information free Jugene Eaton, k end esk set paper } Co wnet R 1 617, 631 S. Spring St., 166 Brandon, Oreg »sk *ndars ewelry le clocks, ¢ Los Angeles, Calif. : = TOBACCO Or snuff habit cured or no Roth books for $1.48. Sent ( 7 , » £ yay $1.50 if cured Remedy sent on trial. man price Is postage SELL your property quickly for cash, no pa ; ; matter whic located Don’t pay big com- Superba Co N Baltimore, Md l lechani 3 Pre Room 811, 200 FE. 0 missior Particulars free Real Estate ADVICE, Information, any subject, 2 ae Salezsmen ¢ Desk B. Lincoln, Nebr coin Reference Fred Klotz, Reading, P from 4 ) foxes in f MONEY ma n Mich, potatoes. $10 | | YOU Need a better grip on mathemati ar detest Gn eek Ge” ee oo 3 down now and easy terms buys land near Tell us to send you a copy of ‘Mathematics , oe —" 2 — He P " oO markets, lakes Vrite day for the Practical Man,’’ only $1.50. By A. Hadle anstead igart & (« , Ist Nat’l “hon : ense methods it removes the mystery R Car ni Se your 1 o Azo ilties so algebra and caleu are Write Smith’s Art Service, Wenatchee, VW — — NEUEN“ EES ple Assuming your knowledge is And art studente are Dr OZARKS 10 acres ne ar Ww hite River to arithmetic you quickly and easily r “pi Tce ate pow witha ~ and proposed power dam, $100, $5 montt working knowledge of algebra, geor chinery. Semple ses D eautien ‘wed 10¢ Se Alvin Zim man, 1802 N ith, Kar trigonometry and calculus Simply “pay M eT ay Sprit tr i Ohi . City, K »stman when he hands you the pack- hai nt : Seer 4 PECAN-Orange-Fig grove On the Gulf’ Address Popular Mechanics Press, TATTOOING Outfits, supplic Iilustrated nt} oma ( aan , oe Big Room 810, 200 E. Ontario St., Chicago, Ill list t free ““Waters,”’” 965 Puttnam, Detr quick returns Suburban O irds, Dept. PRECIOUS STONES ~ HOME OPATHIC And Biochemic pre Mf. Ocean Sprin M tions sent postpaid to all parts of , AUSTRALIAN Opals, black opal fire world. Manua and booklet free H y ROOTS AND HERBS pals, cabinet specimen List free. Norman Bros. (Cx 5547 Ravenswood Ave., Ch S MEDICINAL Ter ; barks, flower Seward, Optician, Melbourne, Australia pil ee tablished 1855 ate. tos ny ills. Over 1,000 varietie WEEDS—Cut ther ith bar on Ree : dopa . 5 ae MISCELLANEOUS u em Ww cutter . , Wri e r log Botani Co., 145 W Shaw Garden Tractor Also plows, cult 112th St., Chicago ' vates and runs belt machinery Low prices NSION Clothes line poles: A table a - o MUSKRATS a oy ; ne Po ithe y ~annot ~ - - i Immediate delivery Shaw Manufacturing > ) e ositive i > pushe ‘ompany ) > ‘ Jale rg ns. or blowr lown. Ideal for campers as tent Company tI epartment _ tay "9 Vy ones ~ 4, . , a ~ - s OHIO Improved Chester White boar —— pastes, mucilages, bleaching, renovating, col- Renita: bacetee an (pigs no kin. $10 ich), vaccinated, adie oring metals, dyeing, glass heat treatment — =e of nn 00 — ereed, Fred Ruet Bs Sciota Nil . pedi f metals, household formulas, ice cream ; - — ~ a 7 , ‘ 7 . : stadia tate iB . mnfectionery, chewing gum, lapidary work a mg a oy you have | DOGS AND PETS exterminating vermin, lubricants, paints oe to sel oo cerry A ~ “ «new - — iments eannins lave any reasonable proposition el RNARD 6Punpie - The varnishes, photography, condiments, canning atari iy - _ candela sathed ar reason ble formulas, rubber, soap, candles, soldering readers all about it—they’ll respond quic Phot bmitted Write Hel- toilet preparations, perfumes, waterproofing Our booklet How to Create More | . Ik1-P Met _ Mont sal fireproofing writing materials Send no ness’” contains some very interesting c n ; E = money Just write a postal When postman ful facts Write today for your co - : inds + hook pay $5.50 and postal charges free M. L. Rund, Manager Classified FON Terrier Collie English, German Popular Mechani Pre Room 8&I1f 200 vertising, Popular Mechanics Magazin Stiepherds tarnes Farm, Fairfield, Nebr. E. Ontario St., Chicago, Ill E. Ontario St., Chicago, Il

DMADTITT AD MECUANTC ANVERTICING SECTION

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POPULAR MECHANICS ADVERTISING SECTION 79

+ A i Practical Mec ITS al Techni cal Up-to-date Books on Aviation—Electricity—Recipes and Processes— Diesel Engines— Ship Models—Miniature Boat Building—House Wiring—Automobiles—Mechanical Movements—Heating—Piumbing— MWachinery—Lathes and 50 other Practical Subjects. “I nt your information on practical, mechanical, technical or scientific subjects up-to-date—if you want it complete, nd authentic, then write for the free Henley BOOK catalog It brings you a list of modern, well-printed, reasonably I thoritative books on every subject from aviation to soap making and automobiles to plumbing. I hort list of twenty of these recognized authorities, books that are used in 1 Models T and A Ford Cars, their I f schools and colleges and consulted and studied by workmen and experts construction, operation and repair, by t Yo n look at any one or more of these books for five days and make Victor W. Page. Complete practical prin- eve ‘ ou can a av any one GF . - Ive Gays ane Mak ciples of new and old model Fords and Ford- sion of their value after you see them sons. 223 special diagrams and photos. Un- questioned authority Up-to-date A real guide for owner and repairman. 572 pages Enclose no money. Order BOOKS by uener ee 35 seer ane ae 72 page I st of titles Check the books you want by drawing a circle around their 1 Mechanical Movements, Powers the coupon When the books arrive deposit the purchase price with your and Devices, by Gardner D. Hiscox d if not satisfied in every respect, return the books within five days and 17th Revised Editior ‘1 engravings of will be refunded at once and without question Fill in and mail the mechanica ice ppli ances with " t os » Ce >a " and rel Ge completes pt eme valuable ‘ Norman V. Henley Publishing Co., Dept., PM- W 15th oe ented tm Iechonien "409 pages. Price, $4.00 1 Modern Aircraft, by Major Victor W. 6 Diesel Engines, their application and 1 Mechanical Appliances, Move- ‘ An 855-page indisputable au- operation — Marine Locomotive Sta- ments a Construction Novel- inexpert. Every phase of thein- tionary. 565 pages. 341 illustrations. Price ties, by Hiscox ns and descrip- plained Modern aircraft, its con- $5.00. tions of man lifferent ntr ate — snical maintenance, operation, control Ship M oo ;wrar am ce ces and rt l of operatior octavo , p Model Making, by Capt.! TeCs ‘ oo ~ 4 book used * prac + y = How to make simplified or particular . pages. 1000 illustrations. Price $4. .00. & fields and schools eference fo 1odels of decorative ships ach volume ts in all branches. Beautifully bound ante fully yd _ Each . 1 Practical Steam, Hot Water Heat- ted. 400 illustrations. Price, $5.00. — . : ing and Ventilation. All systems, 4 1ot water, vecuul or, etc.. new systems 7 How to Make a Model of the U.S.S. of hy water circulatior nd ventilation 4s ” Dri Seviand un-to-~date , meee See atra. 2 Everybody’s Aviation Guide, by Constitution.” Price, $2.50. R ul , pas istri Victor W. Page 600 questions I Price, $4.00. ers to make the layman “‘air wise How to make Worthwhile Mode’s of Q ‘ } ‘ - : uestions and Answers on Steam, : e the beginn the proper founda- g Decorative Ships. Price, $2.50. 17 Hot Water, Vapor and Vacuum ) nguage. 247 pages, 140 illus- . : “ 1 : o} Price. $2.00 Practice. 500 qu nswe Excellent . —— u How to Make a Model of a Clipper = text for apprentices and inr erienced fitt Ship. Price, $2.50. Cover i ! ad n heatit il entilating f systems I Ss. 157 illustrations. Price ‘ a A BC of Aviation, by Major Victor W . , , 3 ‘ 60 pag Tf simple inderstand- 10 House Wiring. Full modern informa- $2.50. - : readable, well printed, pro- {% tion for successful, safe hou “tery Standerd Procticat Plumbing. Sth f trated information that every <0 pages 106 diagrams, plans and illustra- ~~ Rest « W beginner ought to have. Hand- tions. Revised. Price, $1.00. Ae plun =~ Excellent inst cover. Price, $1.00. beginners ant seteremee tos soramed ( 11 Miniature Boat Building, A. ( workers. A standard for mat ears. 444 Str Leitch Naval Arct , = to page 00 full page plates and 264 additional 4 He mley? s 20th Century Recipe Book: build working models « f sail an i power boat illustrations. Price, $4.00. of re cl formulas nd thatrun. Includes building their steam power ee y ' esses for anufactur “4 PPacrne plants and boilers for blow torch firing. Shows 1 Modern Plumbing _Mustrated. lities. New revised edition. 807 every step. Five full sets of plans. Others atest 8 por ed ay OGs OF sai ¥ r t page Illustrated. Price, $4.00. fully described. 242 octavo page 00 pro- installation. 5 niarged Et a. Sue f ; gressive drawings. Price, $3.00. pages. 67 full page illustrations. Price, $5.00. H 20 kathe Work for Beginners. Om ns n 5 Everybody’ s Electrical Hand Book. 1 Modern Gasoline a by up a new we amateu \ llustrated information on Victor W. Page, member 8S I uable aid pw machinist or pprentice “lt i ot é larms, electric wiring, elec- Every phase of design, construction, opera- foresees all questior nd ercomes all -~ nees et A money-saving home tion, maintenance and repair of all model difficulties. Shows how t et up lathe, ex- sices pages. Numerous diagrams. Pocket ears including the New Ford. 1130 pages plains tools and correct way of using them he J $1.00. 1000 illustrations. Price, $5.00. 240 pages, 167 illustrations. Price, $2.00. K S = a = cheap Tear this Out and Put it in the Mails Now Norman V. Henley Pub. Co., , owt. PM-3, 2 West 45th St., New York, x Gentlemen: Please se nd me copies of ae books whose numbers I have checked at the left When . , Cire le around they arrive I will deposit the purchase price plus a few cents postage with the postman and if not ; numbers you want thoroughly satisfied will return eitber all or part of the shipment for complete refund within five days ; . ~ : GRD Ds din 0's v.00 0.0.000:9500002000000600060000000860088 rea Street Address bas : if you 11 12 13 14 15 cis... State » i We will pay the portage if you enclore carh with your order B 16 17 18 19 20 Check here for catalog of all Henley books on more than fifty practical and scientific subjects If outside of U. 8S. remit when ordering and add 15 cents per book to pay registration charge ] | a

VrhAMITy,T AM i-AMTAWAarTAe i~A rere eee se ae es) Oe eee ee

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seseseteaer

Discovered / <The Scientific Secott of Caruso’s Amazing Vocal Power post mortem of Caruso’s et vat showed supe rb develop- ment of his Hyo-Glossus mus- cle—again proving the sound- ness of Eugene Feuchtinger’s theories of voice production.

Eugene Feuchtinger, A. M., Musician-Scientist, who dis covered this scientific method Sor developing the voice. The arrow pointa to the all- important Hyo-Glosssus mus- cle, the ‘‘keynote”’ of the Phy- sical Voice Culture method.

we Discovery Professor Feucht inger, A. M— famous in the music cen ters of Europe discovered the secret of isolating the Hyo-Glossus musc' He devoted years of his life to scientific research and finally perfected a system of voice training that will deve’op your Hyo-Glossus muscle by simple, silent exercises right in your own home nce the Professor brought his discovery to America ver 10,000 happy pupils have received his wonder- ful training. 100°. Improvement Guaranteed The Perfect Voice Institute guarantees that Physical Voice Culture will improve your Voice 100%. You are to be your own judge—take this training—if your voice is not improved 100% in your own opinion, your entire tuition will be refunded. 2 # Send th Inspiring Book FREE pene euneh send you FREE this valuable work, “Physical Voice Culture’. You assume no obligation. It may be the first Step in your career. Do not delay. Perfect Voice Institute 1922 Sunnyside Ave., Studio 13-59 Chicago TTTTTTTTIIrIrrrrirririitiiitiititittt i. 1922 Sunnyside Ave. Perfect Voice Institute seddiea;so Chicago Please send me a copy of your new book, ‘Physical Voice Culture’, FREE. I —~ RR that it is mine to keep and there is no obligation on my part. I am interested in OSinging OSpeaking © Stammering 0 Weak Voice Name a ninieteaateen Gabioteimil Address on oun

for Heating or Cook Stoves, Ranges or Parlor Furnaces Here is a reliable, trouble-free and safe natural draft oil burner. It is just as easy to operate as a common kerosene lamp Any child can light with a match It makes its own gas from liquid fuel, pro- ducing an even, clean, white, hot smokeless flame It has the patented LACO mineral wick, in- destructible, and guaranteed to give per- The New LACO fect satisfaction. Will resist 2.000 degrees Natural Draft Oil Gas

of heat without breaking down. No noise ; sian aaa only sound is that of perfect combustion. $18.00 re Burner can be turned extremely low with- ¢ i out smoke and without flame going out

The I AC is diat t a class by itself. Far super full rinat 7 Laco Gas Burner Co, 2!" ss. YS 114 Union St., Griswold, Iowa ' idaho " Wrestling Book Learn at

. Be an expert wrestler. Learn at home by mail. The greatest wrestlers of all, Frank Gotch and Farmer Burns, both world’s champions have prepared the most wonderful course of les sons ever written on Physical Culture and Expert Wrestling. Be strong and healthy! Handle big men with ease. great tree book telis you how. Don't delay. Write now. State your age. Farmer Burns School, 3:379 Ry. Exchange Bldg., Omaha, Neb. it DIANO : Jazz taught by mail. Note or ear lessons for adult beginners. Also Self-inst tion system for advanced pianists Lear Bass Styles, 976 Jazz treaks, hundre Trick Endings, Hot Rhythms, Sock, St and Dirt Effects; Symphonic and W Harmony in latest Radio and Record 8 W rite for Free Booklet WATERMAN PIANO SCHOOL. 1826 W. Adams St., Los Angeles, Call! Be a drummer! Trap Drumming made easy in a short time. Our free instruction cours nished with genuine Ludwig Tr Drum Outfit. Develop your natura of rhythm. Go to your nearest dealer write for full details. | | LUDWIG & LUDWIG, 1611 North Lincoln Street, Chicago | BIG VALUE FOR 10 Cts. 6 songs, words and musit; 25 Pictures Girls; 40 W ays to Make Money: 1 Joke Bk Book on Love; 1 Magic Book; 1 Book Letter ing: 1 Dream Book and Fortune Teller; |! Book: 1 Base Ball Book, gives rules for gam Toy Maker Book; Language of Flowers: | s Telegraph Alphabet 12 Chemical Experin Magic Age Table; Great North Pole Game Conundrums; 3 Puzzles; 12 Games; 30 Ver Autograph Albums All the above by m 0 cents, and 2 cents postage ROYAL SALES CO., Desk 317, Norwalk, Cone

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POPULAR MECHANICS ADVERTISING SECTION 81 Tremendous growth of the new giant industry Electricity—has created overwhelming de mand for Commercial Electrical Engineers Large electrical concerns are actually pleading 2 for men combining knowledge of electrical Zz with thorough commercial training he Commerical Electrical Engineer is the ‘‘key- man” of the modern electrical concern rhis big new field pays high salarie offers wonderful opportunities for advancement Now—at the School of Engineer r of Milwau . kee, you can become a S Commercial Electri- cal Engineer in 12 short months—or sé cure the Elec. Eng neering Bachelor of z Science degree in 3 years Large well- e equipped school for ¥ 2 years a leader in — American electrical edu- cation. Our graduates are succeeding in all ' parts of the world. Our Electrical Engineer- 12 months Practical ing B. S. Degree in a | training, we know 3 vears! 4 fits men for big paying 4 “ positions Practical Engineers teach you! rhey know what to teach and how to teach it so you can earn money with it! Hundreds thousands of dollars worth of actual commer machinery to work on Earn Living Expenses > lo men who are oo + desire t enter this new and highly profitable field— wi offer an opportunity to earn! ng expenses while ert e e attending the School of Engineering. Our plan reduce iat El t educational costs to a minimum and give valuable ost as er ec rician practical experience Low tuition fee Radio Clut = School Orchestra. Fraternities, Be IN 6 MONTHS ree ge. p P are re \ » he ieb ; Just 6 months and you are re ady to enter the — e business of Electrie Contracting, Power Plant and Substation Opera- as rse is complete—-covering electric light wiring, motor wiring, meter I 1 operation A.C. and D. C. armature winding, motor generator tI le tics, operation, and repair, transformer Operation, etc P = Great Industrial Co-operative Program in - Milwaukee's leading electrical concerns ire have united with the School of Engineering St in a gigantic program of Industrial Coopera- W tion. This program, unlike anything ever ds attempted by any Engineering School in the country, insures students at the School of Engineering a practical training geles, Call! to fit the needs of the councry’s large — a industrial concerns More than that q this plan offers possibilities for er: actual employment both while attending the School of Engineer- hart ing, and after graduation—even a shor financial assistance for worthy stu- rs dents Send coupon for FREE de- ’ tails y | ra ' S. Govt. requests S. of E Students TT SSSR EER Sees ress eeeeee tees SSRSSERRT SSS S STEERS ERE eee eee ira issist in acceptance tests of . School of Engineering of Milwaukee, lealer esel Engines for Panama Canal, 4 Dept. PM 1228, Milwaukee, Wis . : Without obligating me in any way please mail free Photo- Chicage RADIO AND ELECTRICAL S story book. “Rise to Success Through Electricity” Cust off the -- REFRIGERATION S press), and NEW Bulletin regarding the course | have marked Ss with an X Cts. in nese monthe—just 8 Commercial Elec. Eng. for Eee Refrigeration “ - sar ig ~ , t High School Grad. 1 year tadio t o 2 years g mat ¢ we tte ho gets into the game “ 4 mS. Eng. B. 8. Degree 3 yrs Practical Electricit 3 I 4-4 Ay needed for s Automotive Elec Home Lab. Service gan responsible well-paying ge ~~ ; your rn 1 ou ar > 1 Mors Ve train you quick! poms : I am interested in your Earn While You Learn Pl erin f ice you in a good posi- s ame; li daily broadeasting from s Name Age Ver formerly WSOE). ACT = : m . . 4 lress ik, Cona s Addre GCHODL°f ENGINEERING J 4 City af Milwaukee : Founded 1905 __ PM 1228 __ Milwaukee. Wis. 5 Faueat DODTITT AD MITCTaANTSCC ANVEDTICIWC CreTinw ov

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This new self-massaging belt not only makes you look thinner IN- STANTLY— but quickly takes off rolls of excess fat. IET is weakening—drugs are danger- ous—strenuous reducing exercises are liable to strain your heart The only safe method of reducing is massage. This method sets up a vigorous circulation that fee'ns to melt away surplus fat rhe Weil Reducing Belt, made of special reducing rubber, produces exactly the same results as a skilled masseur, only quicker and cheaper Every move you make Belt to gently massage 5 sults are rapid because thi ) nd 4 every Fat Replaced by Normal Tissue causes the Weil yuurabdomen. Re is belt } for From 4 to 6 inches of flabby fat usually vanish in a few weeks Only solid, normal tissue remains The Weil Reducing Belt is en- dorsed by physicians because it not only takes off fat, but helps correct stomach disorders, con- stipation, backache, shortness of breath and puts sagging internal organs back in place Special 10-day Trial Offer Send no money. Write for de- tailed description and testimonials from delighted users. If you write at nee, you will receive a special 10-day trial offer The Weil Company, 912 Hill Street, New Haven, Conn queasesssassssssasessss SCSSCCSCECCeeeeeeessesseeeseEseeseesEEEe . : THE WEIL COMPANY, 912 Hill St., New Haven, Conn. § H Gentlemen: Please send me complete description of the Well § s Scientific Reducing Belt, and also your Special 10-day Trial 8 s Offer. . : i : : NE ORT NG UE ET a ae PO ee aE Ee = . . 7 . 4 : 3 Addre . . . . . . . § City State : . . w puccccccccsccccccceccccescccesccsscssccsssnssessesssssecescasces This is.the GUITAR you hear on the radio and records. The Gibson Mastertone Guitar, with its rich cone of such depth beauty and carrying power, embodies finest materials and most expert crafts- manship; acclaimed as world’s finest guitar. Easy playing qualities make it easy to learn. Send coupon NOW for FREE BOOK and details of Easy Payment plan. Men- tion which interests you: Guitar, Banjo; andolin: Ukulele. . GIBSON, Inc. 1203 Parsons St. Kalamazoo, Mich. Gentlemen: Send Free Book and details of payment plan on [Instrument] PENNE. acocaunpuensanagsnsiuatinsnengpemmneapenedesnnges i" Dh GPG Bh cncccccctccebavstaussesente City POPULAR MECHANICS ADVERTISING SECTION 500 counse tor 92228 Haven't you often wished that you could draw cartoons illustrate some idea, sketch some pretty fa ete? You can do ull of these things. One of Auer most famous Cartoonists and illustrators veloped a great, simple system for succes branches of Commercial Art. This syst bas revolutionized the entire theory of drawing. |; means that drawing can be as easy fo: writing — much simpler than shorthand, bookkeeping or typ« ting We are now placing this origina st for learning Drawing, Art and Cart y consisting of 34 lessons with over 500 Illustrations within reach of every one. If you will devot few hours each week to the Course WE ABSOLUTEL) GUARANTEE that you will learn to draw a: draw well before you have half finished the If we fail to make this claim good, we wil! every cent paid us, By eliminating a large of force for answering correspondence, expensive cat alogs, etc., we are enabled to make a price of $2.0 the cheapest price ever known for a hig! home study course. Many have sent us lett« ilar to that of Rob’t P. Davis of Detroit, whx “I can't see how you ask so little. It is more ¢ I expected."" Learn to draw. It isa big no matter what field you are in. Send No Money If you order the : we will ir a once, Just order the course and $2 gk drawing outfit, cor « on arrival pay postman . Be = pam ils, pene ce oman eaarenm ‘er 8 — plus a few cents postage, payment in full ae: Brgy og for the entire Course and Drawing Outfit lf not entirely satistied, return within five daysand we will Refund Money. Address: LEDERER SCHOOL of DRAWING, Dep!. 296-X, Chattanooga, Tenn Orders from outside the U.S. A. are payable $3.28 cash with orde BE AN OFFICER in the U. S. Coast Guard $1700 Up to $7,500 Yearly $780 yearly at the U. S. Academy while training Yo rank F.nsign to Captain in service. Age requirements 18 to 22 rite Dept. D for information. yy A heer 4 PREPARATORY SCHOOL Ga. .w. Washington, 0.C to go to work without any additional! cost and SIGNS. LEARN AT HOME IN SPARE TIME DEMAND INCREASING. $75 WEEKLY. EPARE NOW FUTURE UNLIMITED. CIRCULAR FREE Universal School of Lettering “rex”: Poultry Guide FREE We Tells all sbout chick’s-care, feeding and raising %j for profit. Also describes Hot Water & Electric . “‘Ideal’’ Incubators $11.50 Up With Original Patented EGG TURNING hg ““Ideal’’ Brooders -- $6.90 Up Coal, Oil, and Electric Brooders, Poultry Supplies, Baby Chicks. Special LOW PRICES!’ Write Today! J. W. MILLER CO., Box 12, Rockford, Ill. INCREASE YOUR POULTRY PROFITS! By proper Breeding, Feeding, Housing, Cullir Marketing AMERICAN POULTRY JOURNAI how to do it, and in addition a series of Colored Pictures slanatory ont tell and show many thi not Just red pictures of birds but pic 1 natu er before shown by a poultry r. 12 Issues of > haga | Poultry. ‘Journal contain about 1000 panee-Price 25e8 year— rs KMERICAN P POULTRY JOURNAL, 14-536 S. Clark St., CHICAGO RAISE BELGIAN HARES NEW ZEALAND REDS—Chinchillas—Flemish Giants MAKE BIG MONEY—We sup poly stock and pay you following prices for all you raise Selgian Hares $ New Zeaiands $3 each —Chinchillas $4 each— Flemist $5 each. 32-page pe book, catalog and contrac’ copy of Fur Farming magezine, telle how to raise mink, fox, etc., for big oredite, ‘all forgl0c. Address OUTDOOR ENTERPRISE CO., Box 25, Holmes Park, Mo. FOY’S BIG BOOK, in Colors A complete guide: to successful Senter and Gaaee Raisin Low prices on CHICKS, Breeding a and PIGEONS rite Today! FREE El! FRANK FoY. Box 18, Clinton, lowa LAN 8 &* Poultry Houses ctotes, lustra + secret of getting winter errs, pb >. 289 fit an ged eenet of Send 25 —~ 4 INLAND POULTRY JOURNAL, Dept. 5/4 Indianapolis, ind. American with e methir —— i

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* Govevemnent ¥ Job is a Good Job, > $1260 to $3400 A YEAR STEADY WORK MEN~WOMEN 18 to 55 VACATION WITH FULL PAY Is Your Job Steady? Compare these conditions with your present 1 condition DO YOU GET $1,900 EVERY YEAR? HAVE YOU ANY ASSURANCE THAT A FEW YEARS FROM NOW YOU , GET $2,300 to $2,700 A YEAR? You Can Get a Job These positions are not hard to get. Country residents and city residents star ud equal chance Experience is usually unnecessary, and polit- ical influence is not permitted Let us show you how. Get Free List of Positions ill out the following coupon. Tear 7 and mail it today now, at once DO. IT NOW—This investment = two cents for a postage stamp m: result 1n you getting a Govern- ment Job. ith FRANKLIN INSTITUTE, ramen) §=Dept. K. 173, Rochester, N. Y Rush to me, free of ch: arge Copy of 32-page book, iow to Getal Government Jobs now obtainable; Send sample coaching. b Railway Postal Clerk.. Postoffice Clerk {) City Mail Carrier () Rural Mail Carrier [ General Clerk ssrA TOT Ll lhUC EO TO OSS OC or ee 5S. Gov (1) a full description of the posit ernmen (4) Tell me how to get the neon I have ch e ked Prohibition Agent-Investigator Name Address ‘PICK YOUR JOB jo m checked below c POPULAR MECHANICS ADVERTISING SECTION Free A list of t l ($1900-$2700 $1700-$2300 $1700-$2100 2100-$3300 $1260-$2100 ($2300-$3400)

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84 POPULAR MECHANICS ADVERTISING SECTION At last the average fellow now has a chance to get into aviation. At last the ordinary young man can train for jobs paying $80.00 a week and up get into the world’s most fascinating pro- fession—the fleld where men arein BIG DEMAND where the demand is getting BIGGER and BIGGER—where OPPORTUNITY is positively the GREATEST! It is important that you train with a company operating a regular transport Previous Experience Personal Instruction from cov ine =~ This means that all planes are Not Necessary Famous Aces nt ies Sep 1 effic 2 Our instructors aresoefficient You get personal flight instruction strictly up to the minute and efficiency is our courses have been made so pnder fsmous sces, Only U. 6. Licensed at its height Phat is one reason why simple that you don’t need tO jearn everything about aviation includ A.S. T. Students are in big demand. The a” aes a ak cae Ur Be en oe ei - A. 5. T. is endorsed by the profession and is , grad repaiciag—everything neccesary $0 & tween a monoy nda you for BIG PAY ” regarded as the largest financially responsible ‘or today he is making $150.00 Fill in Coupon—Mail company in Chicago actually engaged in Don’t Worry About To ay air transport service, with hangar and shops ; First of all—fill in coupon and mail at in Chicago's million doffar airport and — An Education hee orks . school using the latest eo mathematic Ue quali, George without any sozcil grape equipment. Theonly €/ 2000080858 ' 8 s. Toda aking $110 a week soo, you ean comme to Chi one in Chicago with a — ] nape — a take up the practical work. But ‘ Ryan monoplane Bee mee ‘ 1 Free Employment Service = {1 to mail coupon today a te eS A See re a pe aulatall, ontagiatipcuabapera Get Our Big Book Wright wheel and — &@ tion. please send ine your big book » ‘ i-partment where every year we pla We will send you absolutely FREE our motor, Laird commer- © Home Study. is ir ¢ paying jobs. We d big book “AIRWAYS” w tells you ” Practical Course in Chicago. o ything possible to get positions for how easy it t t into avietion and cial and Swallow . graduates. L. Dagan landed a job how hundreds of men who were doomed planes in its fleet co | $150.00 a week one hour after he to small pay—are w meking $80.00 : i us to help him a week and up—ACT NOW, Waco and Simplex 2 a Fill In Coupon—Big Book Sent FREE planes You can & a AVIATION SERVICE & TRANSPORT, Inc. (0) eo : ’ ba variety of planes A. we Ter - a , a 203 N. Wabash Ave., Dept. 13-59, CHICAGO, ILLINOIS —T. students train on BERBER ESE BREESE RES © AUTOMATIC DRAFTING TABLES The only ones that make drafting easy These tables, used by professional engineers for speed and accura are ideal for beginners. For a limited time only, we will give complete and up-to-date mec! cal, architectural or structural DRAFTING COURSE FREE with each purchased table Mr. F. W. Reinish, New York City, writes: “I owe my pres Automatic Drafting Table, which enabled me to draw_ neatly gestive layout to convince my prospective en ple ver Write today for literature and details of drafting course. JEROME W. HURYCH MFG. CO. 24-31 Kindred St. Astoria, Long Island, New York Extra Money Quick . : Here’s An Easy Way! Begin Right Now! —to bring you a fine cash income! Thousands are making Fireside Without taking any time away SS eee °O : a ae o thousands of dollars and doing ene By = = . _ their own work besides. We supply wor at 10me ecorate beauti- you with everything you need Big ful giftwares the Fireside way ~ Generous Complete Kit WITHOUT You can do it—in spare EXTRA COST. It’s a cinch! We moments. No previous training nt $5,000 position t t J and quickly absolutely guarantee your success. required No special ability R . 2 oa a ae - needed No tedious study No F E E " | pe Mich | memorizing. With the Three Fill out = mail a my om , rf 1 7 2 Bool | 3 hea Wis oe “8 . x coupon at once. Send me your wonderful Free Boo Simple . ee p rs nt ye i by Mon Without any ob- | colors. This does not put me under | sieur etit t 1e great artist : ligation it brings j obligation Director of Fireside Industries, it you wonderful | is just fun! We want men in Fireside Book in | Pes dc ccces every community. Be the first! pon gg | é 7 everything. : Fireside Industries, ,°°p*; S&¥ Act now! ' Address 7

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POPULAR MECHANICS ADVERTISING SECTION 85 Heres My Guarantee to Car Owners: Sone _— E OFFER | EE casouN - hace mpensst® ad test- eu ae alrendy 4 er o mi Ss “% * bs ber - pres , = t y ‘st ely Mis \ i ie .! > +e . m Dakota. ~ 4 that ry Pukws ¥ ~ ; tis! y pn ev ver $90" Ve } - ae @ } be \ “ 1 ne fe ory y 7 } on’ ale , ' anon whatyewill re- >< | eats } at a he rf ’

Save 4to}2 |

a ‘| Your Gasoline: Or This Daring Trial is FREE ‘ean Accept this daring offer to test this amazing gas-saving device on your car—the test is free if unsuccessful in your opinion. Read below how it works—learn about money-making plan— Then mail coupon before offer expires. $75 TO $200 IN A WEEK! How It We The Stransky Vaporizer was in- vented by J. A. Stransky, former can- didate for governor of South Dakota It is based on a newly discovered scientific principle that has been tested thousands of times by car owners, dealers, mechanics and other author- ities. It has no delicate parts to get out of or- der. You can attach it in about three minutes and it needs no further attention. And it also | ga. cso HINK of saving gasoline like this! J. R. Wood of St. Louis reports hI hat he increased his gas mileage from able '/ to 30 miles per gallon on an Olds- mobile, during a 3,000 mile trip. [hat would mean a saving of 1,300 ra gasoline miles! And _ thou- nds of car owners have reported eage as follows: Ford, 20 to 40 es a gallon; Chevrolet, 30 to 40; . 19 to 22; Buick, 17 to 32—and

n : Mane have used it for three to cleans out carbon an astonishing new way. eight years and still praise its saving i asoli at _ nd praise its saving in gasoline, Mail Coupon Below a. 7 ncreased engine power and less carbon trouble. if d , ith $ in Oden - ll ; é he . ; you do not save gasoline wit Hours ver two million car owners have installed it. this amazing device—the test No wonder it sells so quickly that Williams made doesn t cost you a penny—and you My gas bill has e429 3 | Cc 5 - . - win a cash forfeit besides. Over two ' been cut in half. My | in ours, ronk $ | in an hour, Herrick $157 million car owners have accepted engine —_ as good ne day! You can make big money in full or spare this test offer Mailing the coupon as new went out me just showing this amazing device to car owners ig - ; bring you full details. | Saturday a out three | a } eng ‘ ou will also learn a definite $75 hours and secured 16 | | letting them test it themselves. to $200 in a week plan. Your re- orders quest will not obligate you. Rush J. A. Williams i the coupon today ae. — )

The STRANSKY ls. " . Stransky Mfg. Ce., , W-10 Stransky Sioa, | Pukwana, S. VAPORIZER . Yes, send me full details without obligation Saves Gasoline Soe ' Address J.A.STRANSKY MFG. CO. Bugtinessen 2 tats

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POPULAR MECHANICS ADVERTISING SECTION Tobacco Is Hurting You Look at the facts square in the face, Mr. Tobacco User. You may think tobacco is not hurting you. : That is because you haven’t as yet, perhaps, felt the effects of the nicotine poison in YOU! system. For you know that nicotine, as absorbed into the system through smoking and chev ing tobacco, is a slow working poison. Slow, yes—but sure. Tobacco is lowering your efficiency. It When your hands begin to tremble— res ‘ , akeac ; ¢ . P . and your appetite begins to fail slows amandown. Makes it harder for 7OR A cee haenesan ts hin nine” tawentthen~ to concent rate your mind on your work. You and slight exertion makes you short of breath— haven’t near the amount of ‘‘pep’’ and energy ace. a right to suspect that . " ava i , . . cy} . oo A is getting the upper hand. you would have if you stopped using it. There's oes anatdndenenndl Gacteer WA cath cate Geet theee o many 4 man twice as old as you in years who's twice as only a few of many symptoms of tobacco poisoning young in energy, simply because he lets tobacco alone. And YOU know that the use of tobacco in any f Some day you will realize to what an alarming extent is an expensive, utterly useless habit. You know tobacco has undermined your system. ought to quit. Tobacco Habit Banished Let Us Help You 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 formin a very fewdays. Not the slightest shock to the nervous system. Your tobacco eraving will usually 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 marvelously quick, scientific and thoroughly reliable. It is in no sense a substitute for tobacco. After finishing the treatment you have absolutely no desire to use tobacco again or to continue the use of the remedy. It helps to quiet the nerves and make you feel better in every way. Asingle trial will convince Results Guaranteed °° 60r ei vinine: money-back guarantee goes with each full treatment. We will refund every cent you pay for the treatment if after taking it according to the easy-to-follow directions, it should fail to banish the tobacco habit completely. Let us send you our free booklet on Coupon for the deadly effects of tobacco, to- Free Proof gether with testimonial letters from men allover the country telling how they have been absolutely freed from the tobacco habit by this simple home treatment. You could not ask for stronger proof that Tobacco NEWELL PHARMACAL CO. Dept. 300 Clayton Station St. Louis Please send, without obligating me in any i your free booklet recarding the tobacco habit proof that Tobacco Redeemer will positively ‘ ¢ from the tobacco habitor my money will be ret i Redeemer will free you from the habit than the evidence we will gladly Name .. eceeescceerecesoserssccscoserscnenes send on reguest. Just mail the coupon—or a postal will do. NEWELL PHARMACAL co. Beant Cal DER y cccenceecsecccnccesssccs 90s envepeesnoscoceee - Dept. 300 Clayton Station St. Louis, Mo. Town......... cnnewemieetee — State

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POPULAR MECHANICS ADVERTISING SECTION ./ 25) Bald . c .* PD , pe (Aull 87 amazing hair fluid which I discoveredmyself andwhich grew hair on my head. a This Ampoule is absolutely free. Don’t send any money. There is no C.O.D. No charge whatsoever. All I want isan oppor- tunity to show you how easily I grew hair on my own and hundreds of other men’s heads. Merely mail the coupon below for free Ampoule. Here Is How I Used to Look I was just as bald as this picture. It is a true photo- graph without any tampering or retouching. It is exactly as I used to look. Then look at the full head of hair I have in the pic- ture on the left. As I have stated so often, I don’t know whether I am the first man who discovered this great secret, but I do know I[ have it, that I grew my own hair and that Iam growing hair on the heads of other men all the time. \|}) Bald Men Sxovi82?/ @ What I accomplished on my own head ard on other heads I can do for you, provided you are under 45 years of age and loss of hair was not { caused by burns or scars. Anyhow, I must succeed or you pay nothing. No apparatus. My home treatment is simple, quick, inexpensive. Mail This wa ee SE _ Free Coupon! ‘free coupon Mail the coupon today — Right Now —I will send you, im- And Brennan after Vree- grew his hair. Write and I will tell you Bren- « nan's story ‘and give you bis eddress. Here is Bot Wiseman grew hie bead of hair with my won- Jf derfu! hair Gorn fluid Al about Wiseman and how he did it, if you write. You will get bis address, too. : : } . a = ay ' mediately, one full Ampoule of my marvelous fluid which I 1359 Euclid- Windsor Bidg. t and ' discovered, of which I hold the secret and which grew my ® Vreeland CLEVELAND, OHIO ne H own hair on my bald head. Besides the Free Ampoule of ® Please send me, entirely free, one full Ampoule of the ed Fluid, I will send phetoerate, names and_ addresses of B same Wonderful Hair Fluid which grew your hair. men and women who successfully used my Wonder Fluid ? | for Dandruff, Falling Hair and Baldness. , 5 My Name | Vreeland ocvisn.c$ wea My Address 1359 Euclid-Windsor Bidg., Cleveland, O. State

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POPULAR MECHANICS ADVERTISING SECTION

| a 8 Ot CP OP CP CP CEP CLL ® CP® © + 1g | | eee a th ie eel ee ae ia aed tae ed ad | ly \ NM . ° mt “, rls Lyes 1 ulge on + 1M Ny = Chri Morni ‘ | oe ristmas Morning i! { : ) If You Give Hima Set of | ‘ ou Give Hima Set of | Vanish Almost: i i ‘ e ) Lh y hanic ; —Instan | } —_ a. y= i! NY goes i! \ OG () i i! i! i! y Scientific, Painless Treat- \! ment Used by Doctors, ly MA Hospitals, Sanitariums 1) oe y normal boy from 10 years of age and up will ;’ ¢ revel in the 4 1) interesting and worth-while tl B —Now Offered to +) to make and do that are described in the 4 mam: ‘ ‘ volumes of the Boy Mechanic Library He can learn | \, 4) to make almost anything a boy could want by follow ‘| /* the simple directions in these books and there is en 2 &, ay = CVariety and scope to suit all tastes ‘ 1M Each volume has 480 pages, 1000 articles and aver \' “\y 3 pictures per page Each book is 7x10 inches in size . ) 1% inches thick Beautifully bound and printed j , Set weighs 14 Ibs uw, \y The following few subjects have been selected at rar ‘4 ", from the 4000 just to give you some idea of the seo: ‘ “0 contents: | (. Boats Carpentr ectrical devices \’ | cor Ps « Photograp ¥ | | | games i | . ‘ es $ 4 : ‘\ £ $i { | work Flow Thousands of men and women suffering from rheumatism, paralysis . ns \' neuritis, bronchitis. skin diseases, headaches, constipation, sprains, | tr Metal w « 4 prostate trouble, goitre and many other ailments, even hay fever M odele Se . “| and asthma. have found quick relief, new health and vitality with f pm j 4 Aa ‘, this marvelous scientific invention Iry it ) Wood working Power d s “| b Price per set complete $7 Single volumes $2. I ‘, ' = < I eh ee ai pk) a oe ore State : “y Room P-12 Chicago, if A 7 | . ' . . ae O27 oe eo ee ~*~! : sili : << SS etetete tote PTITTTITITIIIIINIILLLLLIT ILL LLL |

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POPULAR MECHANICS ADVERTISING SECTION || 4etually See- | & Rupture , Shrink! O wonder over forty thousand people have dropped their cruel steel springs and hard cushions and pads in favor of this amazing rupture discovery---a re- markable system that actually tends to shrink your rupture in a new way! Send for a free sample of Airtex, the air-celled material that “breathes.” Breathes Air Note above how you can squeeze this rupture invention in your fist. That’s because it is made of air-cells and flesh-soft. Then when you open your fist, it regains its normal shape. But when you place it over the rupture, it becomes cup-shaped, thus tending to shrink the rupture area back to 7 _ i ! normal size! Clever Sample Free Write name and address on the coupon below. Mail it at once. It will bring you a free sample of these amazing air-cells and newly discovered facts about rupture that show you how to do away with truss torture. ACT NOW! {Sa@eoeeceresseseee*----- 89 g NEW SCIENCE INSTITUTE, ] 1 2155 Clay Street, Steubenville, Ohio i P Send New Free Book and Interesting FREE SAMPLE of ' 1 AIRTEX without obligation. , ' ™ : ES SECT eT ee PCC re TT eT Tee eT - ioc nds in csasccesceckesetesceatennsisdents 1 i i INSTITUTE Bo CiY wee eee eee eee eee eee neeeen es State ieeseeeewen i aN “155 Clay St., Steubenville, Ohio

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90 POPULAR MECHANICS ADVERTISING SECTION OTC ETO AE

~\ inZoMagic Minutes oy | KOTAL gives the BEAUTY *,) and LUSTRE of an yo Expert Paint Job at 1/20th the Cost! NOT A POLISH—NOT A PAINT This Amazing New Liquid, dis- covered in a famous industrial research laboratory, has startled the Motor World. Just flow KoTaL on with a cheesecloth pad as easy as wiping a car with achamois. NO Rubbing—NO Hard Work. Results are Amazing—with one sweep of your hand you restore BOTH the COLOR ( = YW | = he | and Original Mirror-like FINISH to A E Dull— Drab—FadedCars. Gives a glass hard protective coat that does not hold dust and the Lustre Lasts for months.

Wy)

EARN Makes shabby OLD cars look like the a day they were driven NEW off will make fortunes in Aviation Airplane $5 $] the dealer’s floor. Words cannot de- Drafting and Designing is the biggest job in oO scribe the startling transformation the biggest industry of modern times 4 Warranted harmless to any finish | new field of opportunity has been opened up Every Hour You Work Manufactured by a long established by our improved method of training. highly rated, financially responsiblecon- STUDY AT HOMI W cern and sold under the STRONGEST oa ry $200 a eek GUARANTEE ever put on any EASY TO LEARN is Easy Money product. PAY AS YOU GO $1000 Would Not Buy the Start EMPLOYMENT SERVICE Write for booklet outlining interesting We Give You FREE. Get the Facts courses in Airplane Drafting, Aviation, Air- port Management, Weems System of Navi- We Furnish FREE every sales help conceivable. We back gation—endorsed by Colonel Lindbergh you to the limit Man Alive! Here is the Biggest thing in the Commander Dick Byrd, Lincoln Elisworth. motor industry today—it’s going over like a house afire. Admiral Moffett and others Everybody claima big money KoTa men actually make u Hustlers laugh at $100 per week Millions of cars need this Quick—Economica Magic finish which adds 25 to 40 to resale values. Demonstrates vteclf instantly. No Talking PACIFIC TECHNICAL UNIVERSITY Needed Men who have tried to sell everything on earth and failed are making ood with KoTal Even inexperienced country boys make money hand over fst Strike while the Tron é Hot. Get the facta amd get them now We will send Dept. B you our Big FREE BOOK illustrated in colors, and Agente’ FREE TRIAL SAN DIEGO CALIFORNIA OFFER. Good territory is going fast. Act NOW Act at once. Send TODAY. E. RICHWINE & CO., 17 W. Jackson Blvd., Dept. 139, Chicago YOU'RE NEXT - Now Watch YOUR

Men or women earn $25 to $50 a week at home Ail or time. Fascinating work. Nothing to sell We teach y at home. Furnish all tools and materials ARTCRAFI STUDIOS, Dept. 50. 427 Diversey Parkway, Chioag

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¥ id nha POPULAR MECHANICS ADVERTISING SECTION 91 GENUINE MODEL T ERE’S your chance to own that genuine Model T Coro- na you've wanted—on the easiest terms ever offered - at ONE- THIRD OFF regular _ price! Complete in every detail: back spacer, ete., NEW MACHINE GUARANTEE. Recognized th world over as the finest, strongest, sturdiest, portable built. fat oF Yours for 10 Days FREE : Send Money BALANCE .’ Only a limited number of these sple *ndid machines availabk EASY TERMS To get one, you must act now! Experience the joy this persona! writing portable typewriter can give you! Use it 10 days free! See how easy it is to run and the splendidly typed letters it turns out. Ideal for the office desk, home, traveling. Small compact, 4 . Carrying light, convenient. Don’t send out letters, manuscripts, reports, bills in poor handwriting when you can have this Corona at such Cc ASE a low price or on such easy terms. Included—If You Act Now 93510. SAVED eroid carrying case, oiler, instructions free on this Send no money just the coupon. Without dela; | tape we will send you the Corona. Try it 10 days S. i decide to keep it, send us only $2—then $3 a th until our special price of $39.90 is paid (cash price “0.40). Now is the time to buy. This offer may never peated. Mail coupon now. ; Smith Typewriter Sales Corp. Dept. 3-C, 360 E. Grand Ave. Chicago, Il. .* Peeneaeet® LS SOE ES OF mm me mm ee ! 3 : Smith Syoeutans © Sales Corp. . Corona Division) 4 H 360 E. Grand Ave., Chicago, Dept.3-C ; ‘ Ship me the Corona, FO. B. Chicago. On arr ~ ye I'l deposit $2 4 with express agent. If I keep machiac, I'll se you $3 a month § until the $37.90 balance « of $39.90 price is paid: ae clas to vem cain § Ay vom ry then. Iam to have 10 days to try the typewriter { Sir t to keep it, I will repack and return to express agent Y Saoal will sotamn my $2. You are to give your standard guarante ' . ' ‘ Name i ' ' ' ' 4 4 s , . Address — ~ ; Bmopleyed by

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92

THESE BOOKS MAKE PROMOTION SURE! ERE in seven handsome volumes is a complete education in power plant practice Under the editorship of Terrell Croft, a staff of engineering specialists have put into the books everything the power plant man needs to know in order to get to the top.

Power Plant Pr tice ‘'st0etiusvatens an ac Ice 3706 Illustrations With the sid of this library dre de of an it # men have stepp« d into bigger You the sa pportunit a little spare-ti ading y ‘ ident al knowled I seossed vy the highest r 7 gineers With these ks to guide you scan fit yourself for the big-pay jobs i r r plant field » library vers the entire field—boilere ngi ' t injectors—foundations— electrical st

boiler atte wee feed water tres ent of boile and en- »umps and pump

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spiping, ete. HIGHEST with tl e Kind = | PAID MEN man ‘needs in his daily | | pn gen oy work. aipatiaw POSITIONS OBTAINED. in yuer work—tl you want RAILWAY EDUCATIONAL ASSOCIATION to 5 ae x +" Anat nf ~ Estab. 29 Years. Desk D-1-12, BROOKLYN, WN. Y. you want the big pay that porn e with increased know!l- po mes —get these books. Free Triat_No Money A COMPLETE COURSE IN

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: = “H ” 7 . = ow to Draw Funny Pictures’’ by E. C. Matthews, w : McGRAW-HILL BOOK CO., Inc. s 200 new drawings by the world-famous Eugene Zimmer: . 370 Seventh Ave., New York : “Zim” has made the world lauch for forty years, and wa BS Ghip to me, ok arges preosid, the seven volumes of the POWER PI ANT 8 25 years leading cartoonist on Judge. Learn from this mast & LIBRARY, price $1 If wat isf I will send $15 1$2.00 = 22,000 papers and magazines and advertisers everyw @ & mont il the special price of $ O hus been paid. 1f not wanted I will returt s want new drawings. This Complete Course prepares y . . Lessons graded from simple sketches to complete cartox S Name . 160 pages, cloth-bound, 2-color jacket. Complete Cours« . ° one volume, postpaid, $3.00. S Home A ‘ : FREDERICK J. DRAKE & CO., Publishers s ® | Room 510, 179 No. Michigan Bivd., Chicago, U.S.A SD aaN MME 5c5 Seaadipns ae gasnesabadedsesncussncaceendidxioannseiilen se s | —_ + e - SR nameaaiens We MUNI din = ° so emmy OPPOFtUNities in the 438% 34 REAL ESTATE EDUCATOR > murs | radio industry and <9 Pi . ‘ [varia outlines the Ra- tee 2 Re 4s A most comprehensive yet concise arrang j | ae 4S 3 ete | | ment of useful facts about buying. selling, leas! 4 seutee | “Ss SS S and sub-letting of Real Estate, contracting, f of home Ae Ax Me “ erection or repairs, mortgaging, transferring, insuring, et study: Jer = “oe 4 e New revised edition. 288 pp. Price $2.00, postp LESS 8 WP ot | | POPULAR MECHANICS PRESS, 200 E. Ontario St., CHICA JVC VtTTe 8 «6F p C -

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ewe Wwe mo. OK POPULAR MECHANICS ADVERTISING SECTION 93 Amazingly Easy Way to get into ELECTRICITY Don’t spend your life waiting for $5 raises in a dull, hopeless job. Now...and forever....say good-bye to 25 and 35 dollars a week. Let me teach you how to prepare for positions that lead to $50, 860 and on up to $200 a week in Electricity NOT by correspondence, but by an amazing way that teaches vou Electricity in 90 days! Getting into electricity is far easier than you imagine ! n Without Books 1 ¥9Ubay: ack of experience—age, oradvanced we help to make you a master elee- G h F tion bars no one. Ildon't care trician, teaching you far more et t e€ acts ion’'t know an armature than the average ordinary elec- iirbrake—I don’texpect trician ever knows and fit- it makes no difference! ting you to hold big jobs after ack of money stop you. graduation, f the men at Coyne have re money than you have, vhy I have worked out ishing offers. ’ Earn While Learning need part-time work to Coyne is your one great chance to get into electricity. Every ob- stacle is removed. This school is 30 years old—Coyne training is Jobs, Pay, tested—proven beyondall doubt —endorsed by many large elec Future trical concerns. You can find outeverything absolutely free Don’t worry about a job, Simply mail the coupon and let Coyne training settles the job me send you the big, free Coyne question for life. Big demand book of 150 photographs...facts for Coyne-trained men. Our ...jJobs.. . salaries. ..opportu- employment department nities. Tells you how many earn ex- , Ay you wine sana aa aie se 4 ‘ ad penses while training and how we . | r living expenses Prepare for Jobs gives you lifetime service. assist our graduates in the field. This i » you get it. Then, in 12 Like T Two weeks after graduation does not obligate you. So act at ef weeks, in the great roar- e These Clyde F. Hart got a position once. Just mail coupon. »ps of Coyne, I train you Here are a few of hundreds as electrician with the Great ver dreamed you could of positions open to Coyne- Western Railroad at over $100 ed...on one of thegreat- trained men. Our free em- a week. That's net unusual t * A jloyment bureau gives you a. 4 - = tys of electrical appa- F fetime employment service. We can point to many Coyne ever assembled... real : Armature Expert . $100 a Week men making up to $600 a thi engines, power plants, Substation Operator, $65 a Week month. $60 a week is only the s vitch board . Auto Electrician . $110 a Week . - Ww rds, transmit- Inventor . Unlimited beginning of your opportu- tions. ..everything from ff Maintenance Engineer, Soo ewk nity. You can go into radio, FREE } Se e Stat ) « ”) - ells to farm power and Radio Raect ys rf Wa Week battery or automotive elec- ting... full-sized ...infull trical business for yourself Boo ation every day! and make up to $15,000 a year. NOW IN OUR attra Bb : KS-NoClasses NEW HOME ill books, no baffling no classes, you get jual training... all actual work ... build- al batteries ...wind- real armatures, oper- r real motors, dyna- and generators, wir- suses, etc., etc. 3 a glimpse of how PaaS ek»kVE7a=- H. C. LEWIS, Pres. h > eproo modern home whersig’is in: | COYNE ELECTRICAL SCHOOL, Dept.%-72 stalled thousands of doliars*® 500 S. Paulina Street, Chicago, titinois worth of the newest and “ most modern Electrical Dear Mr. Lewis : equipment of all kinds. We Without obligation send me your big free catalog and all details of Free Employment Service, Radio and Auto- now have the largest qucunt of floor space devoted t motive Courses without extra cost, and how I can “‘earn exclusive teachin f prac- tical electricity in the pr d 7 while learning,.”” 1 understand I will not be bothered by overy comfort and conven any salesman. jience has been arrange to make you happy and con- k tented during your training. COYNE ELECTRICAL SCHOOL H.C. LEWIS, Pres., Dept. 98-72c¢ $00 S. PAULINA ST. Founded1s9¢9 CHICAGO, ILL. Name Address City State

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iu ba big § ee 7 | - P| How This Amazing Strip of Lifetime Bronze Homes Weatherstripped A New Cheap Way. Snug Comfort and Amazing Economy Without In- Now stallation Expense. Red-D-Piy Quickly Tacked Around Doors and Windows, Keeps Cold Air Out, Warm Air In! Anyone Can Do It. Guaranteed To Save Cost In Fuel Alone Within 2 Years! Valuable Territory Open—$100 a Week Is Easy! Mail Coupon ‘or Amazing Details At Once! A New Business Offered That 2ays $5000 to $10,000 a Year AH AMMER, scissors, and a ne: pd package of Red-D-Ply—that’s all it takes now for anyone to make any door or window 100% weatherproof! Takes less than half an hour to close up the ‘‘clear- ance crack" permanently Then you laugh at cold trafts, rain, dust ind soot Heating bills, cleaning and doctor bills take a quick tumble. Saves home owners $30 to $60 a year in fuel alone under money-back guarantee, so agents clean up sensational profits. Red- L)-Ply is finest spring bronze, edges hemmed to prevent buckling, holes for tacks punched clear through. Will maintain its efficiency for the life of the house Easy as A B C to apply The fast- elling sensation of the age. Walter Vernohm of Mo. made $142 in a single day! is your opportunity t get into a real worth-while business, steady, increasing profits and big repeat business I sample and proof of big earnings year and mail the coupon below. It costs get the facts this amazing opportunity NOW. RED-D-PLY r free $5,000 a nothing to more ust Discover he Lifetime Bronze Weatherstripping That You Just Tack Right Or RED- D MANUFAC TURING Cco., Dept. W-10 3711-15 Parnell Ave., . Louis, Mo. RED-D MANUFACTURING CO., Dept. W-10, 3711-15 Parnell Ave., St. Louis, Mo. Send illu trated rmation on Red-D-Ply, free sample, and details y "1 Distribu ffe lamt bligated Namo Addres Clty State . Send me illustrated information and free eample. I am interested only in Red-D. POPULAR MECHANICS ADVERTISING SECTION How To Secure A Government Position Why worry about strikes, layoffs, hard times? Get a G ernment job! Increased Salaries, steady work, trave good pay. I'll help you become a Custom House Clerk, Railway Postal Clerk, Post Office Clerk, City Mail Carrier, Rural Carrier—or any other Government job you want I was a Secretary-Examiner of Civil Service. Commission for 8 years. Have helped thousands. Now FREE My 32-page book tells about the jobs opep—an how uu get one Write ARTHU RR. PATTERSON, Giv Service Expert, PATTERSON SCHOOL, Wisner Building, ‘i 0 Rochester, 00 REAL ESTATE SPECIALIST. Maurell made after das b That's what Anthony C getting my free book. Knew nothing about real estate until he learned my successful system young and old—are making big money my way FREE BOOK Tells How Start at homein spare time Build ne fitable business of your own. N apital experie oe Send now for full details and positive proof of amazing ¢r ey- making success. Address President, AMERICAN BUSINESS BUILDERS, Inc. Dept. 4412 18 East 18 St., New York FREE BOOK ON MIND TRAINING An instructive book which explains an amazing syste! training already used by more than 650,000 people Let us send you a free copy of “Scientific Mind Training how you how and why Pelmanism is the only system of teac! developing ali the mental Pm ey at the same time Endors« such distinguished men as Judge Ben B. Lindsey, Sir Harry |! Jerome K. Jerome, Prince Charles of Sweden and hundreds of Write TODAY to THE PELMAN INSTITUTE OF AMERICA 71 WEST 45th STREET DEPT. 612 N. Y.C employment serv for "FREI gt NATIONAL ART SCHOOL, Dept. “24- 42. ‘1008 N. Dearborn, ieee BE AN OIL ‘EXPERT! Trained men needed! Geologists, Drillers, Refiners (Chemist Still Men), Oil Salesmen, earn 2 to 10 times more than in other Write today! FREE Booklet! Petroleum Engineering Univ: Dept. 232, Fort Wayne, Ind Why pay $2.00 for new radio uaranteed high quality 2 arawik tubes for only 39¢ ea check or money order These and thou- other bargains are shown in Borawik's g Radio Guide. Newest coast-to-coast radio sets epeakers, parte short wave and television sup »plies, ete all at lowest prices. Send for free copy today w » 1012 Canal Sta., Chicago, U. S.A. Mail This Coupon pw for Pree Radio Guide —_— — —_ — Now

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Hind! POPULAR MECHANICS ADVERTISING SECTION 95 This is the Medium Size Eveready Layerbilt “B” Battery No. 485. 3% inches thick. 45 volts. $2.95. .2. $2.75. It’s a fine battery of its type—cylindrical cell. BUT, just add 20 cents to your price and get the Eveready Layerbilt Me- costs you ur only dium Size “B” Battery No. 485. 20¢ more Same outside size as the older battery, but more active materials inside, and so you buy 25% longer life with your 20 extra cents, Another great battery bargain! Both these Eveready Layerbilts are made of flat cells that fill all available space in- side the battery case. This construction avoids the useless waste spaces between the cells of the older, cylindrical cell type of bat- tery, and eliminates soldered connections be- tween cells. The truly modern “B” battery is the Eveready Layerbilt. These two batteries, exclusive with Eveready, are longer lasting and more economical. Look for the name Layerbilt on the label when you go to buy “B” batteries. NATIONAL CARBON COMPANY, Inc. New York f San Francisco N ever was SO much Unit of Union Carbide and Carbon Corporation TUESDAY NIGHT IS EVEREADY HOUR NIGHT extra service a... ll 9 P. M. Eastern Standard Time . ies Through WEAF L + na gpa N. B.C. bought for so Radio Batteries pe. ented Eveready feature. Only 8 P. M. Pacific Standard Time Eveready makes Layerbilt Batteries. Through N. B.C. Pacific Coast network > WaT t few extra cents You are a “B” battery user. You are most probably interested in one of two popular sizes. You use, in the majority of cases, either the heavy duty size, or the medium size. If vou use the heavy duty “B” batteries, which is the most economical thing to do, you can xet the Heavy Duty Eveready No. 770, which contains cylindrical cells, for $4. BUT for only 25 cents more you can have the famous Lveready Layerbilt No. 486, which is the same size, outside, but which contains more active materials, and lasts 30% longer. For your extra quarter you eet from a quarter to nearly a ~ third more service. a ee Never before did 25 cents buy “o> | » much battery service! If you use the medium size, ‘ou can buy the Eveready Medium im Dat) ae) costs you onl Size “B” Battery No. 772 for elaine ¥ s is the famous original Eveready Layer- “B” Battery No. 486+ The longest lasting all Evereadys. 4 7/16 inches thick. 45 volts. $4.25. EE AND HEAR THE NEW EVEREADY RADIO SETS

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—— How the 762-Foot “‘Graf Zeppelin’’ Would Have Appeared to Passengers on a Steamer Deck; a Composite Photograph Showing the Huge Dirigible Somewhere over the Atlantic on Its Historic Voyage—See Page 889

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YOUR subscription to POPULAR MECHANICS MAGAZINE expires with THIS issue Renewal for one year $2.50 Circulation Department POPULAR MECHANICS MAGAZINE Renew my subscription to Popular Mechanics for one year, starting with the issue. I will send $2.50 on receipt of bill. City State

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POST CARD —_ STAMP HERE Popular Mechanics Magazine 200 E. Ontario Street Circulation Dept. Chicago, Til.

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POPULAR MECHANICS ADVERTISING SECTION 113 —o—_—_ 7 —_ a ee) re holes for screws, a man needs Automatic Push Drill No h eight sizes of drill-points, hd Price, $2 60 —————— =-. —— No. 15—a ratchet driver, turn on blade for starting ittle screws with thumb and Price (4 in. blade), 80« 0) is a husky “Yankee” plain I r that stands all, rts of Price Sin blade 7S« ‘“YANKEE”’ Tools a a \L are fine gifts for man or boy — . © — *« a mechanic, handyman, motoris tool on earth of its kind is Kine tools, they have all the in. }. $8.20. Lucky man, who ingenuity their.name implies. 7) Make work interesting. Save time, labor. : BIL). And, remember, your hardware . 1590 Raschet Hand store is a real gift shop. The Drill are fine gifts for motoriats. lealer is expert in ki 1owing wha 1530, $5.25; No. 155 men and boys want. Let ies * Toot atehiiiaie tell you what ers to give a os | Ca = ) bibs thold= = ae mechanic; what tools the handy- we = man needs for making things for 5 the home. For driving screws quick and | ee ee easy... simply by pushing on hows all th. the handle... every man want eee this “Yankee” Spiral Ratcl ielp a man to mak things by saving Screw-driver No. 3 A. time and labor Write us for th ee ee +) sto ancl loa book. | rice. D ve ° Fhree bits include " Yankee”’ Tool Book FREE NortH Bros. Mrc. Co., Philadelphia, U.S. A “YANKEE” — “‘That’s the best there is!’’ says the tool dealer.

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114 POPULAR MECHANICS ADVERTISING SECTION ss f, 5 ~ Eo . =a . %. i ; SILENCED! ESTERDAY America’s arise—welded by electricity. skyscrapers stormed into the air to the deafening clat- ter of the riveting hammer. Electric welding! An electric arc, guided by expert hands, knits metal together with To-morrow, this ear-splitting joints as strong as the metal racket will be silenced. Si- itself. Already it is written in lently, swiftly, easily, and at the book of progress that a considerable saving in cost, construction’s drums _ shall our great new structures will _ be silenced. The G-E monogram is assurance that the products on which it appears are electrically correct and dependable. 530-33C GENERAL ELECTRIC

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POPULAR MECHANICS ADVERTISING SECTION / New Features ‘\ 1929 Model e xclusively in the “ Delta’ shop, in additi bP many) \ivantages, include: Mit Ga ) ‘ k ‘\ full details, send coupon below. i Make the Things You Have Always Wanted to Make se easy and so quick with the Handi ‘ I money on repair work arn tur spare time ( mplete in- nd B ie Prints furnist ed A few eds of articles y« can make indi-Shop”’ shown be low. Blue Prints included x , ey & Lares * VO ie 1929 Model in the ode Porta Eectric Hamdi-Shop. Exclusive Features Many Exclusive Advantages In This Big Husky Home Workshop The DE a TA Handi-Shop is a in torize workshop, complete, efficient, and PRAC TH \l nN DESIGN! "ie everything from bi full-sized Seuuiimem, tunshee Setiie tanm. ty Gadi ite detail work Note the two-shaft motor that pernuts two or three « /perations at one — —the heavy Triplk Foundation U-Shaped Lathe Be rods he prac- tical arrangement of the C eee teak sine 3 the cutting of large lumber with ut interference—the Im- proved Tilting Tables on the Circular Saw, Sand : Dise, and Jig Saw Has automatically oile ed br is J od phe a AI I. rw path d is completely assembled on heavy ven- the workshe oD Permi eered w ul base to carry « two or three This combination of advantages rr » more. IS portant operat FOUND EX¢ LUSIVELY IN THE PE] cA HANDI lime withowt continen tt; SHOP! No wonder even last year’s Handi-Shop wa dismantling _~ set-up outstanding value And now, with the many addai- tional exclusive features of the new 1929 model this shop is in a class by itself—above all comparison at a new price that is surprisingly low. 10-DAY TRIAL = i23:. 7 IN YOUR OWN HOME hed a without obligation. See how PRACTICAL, ho FI- spr or chatter. CLIENT is this sturdy, full-sized machinery under ab working conditions Study its manyeexclusive ad- vantages. You will find the Handi-S mplet Write for Val- with all necessary pment r Circular Saw wable Book med with nation on ‘ useful and ing, Wood-turnir _ Jig Sawing, Sanding, Drilling, Grind ing Pend Buffing. Easy Terms Then if you decide Handi-Shop, you can hav choice of three convenient methods of payment Send Coupon at once for FREE beautifully illustrated literature giving complete 7 1 lhe n « the New 1929 Model Delta Han pr ctic: i v to keep the want t? book, enclose li t « -—Keeecem Delta Specialty Company, Depl. A. 128 1661-67 Holton St., Milwaukee, Wis. Shop, and full details of the 10-day Trial ae aot TREE Castres’ Ss ' Offer and Convenient Payment Plan at i Plans Delta Specialty Company oe hg Dept. A. 128 1661-67 Holton St., Milwaukee, Wis.

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116 POPULAR MECHANICS ADVERTISING SECTION Sx e 2 WEY Model Build- ing--For cut- ting out and shaping up innumerable small parts. Pattern Mak. ing- For deli- cate work on atterns of intricate de- sign. n Making -Forcuttin out bloc letters. Antique Furniture- For matching odd pieces and parts in restoration work. Fr HAMS] & he Mark of a Complete Line of pager restgemence lectric Drills Make the long winter evenings shorter! You can do it with one of these Motor Driven Scroll Saws. It's a Goodell-Pratt Tool--and thousand and one uses for it, real tool--a there are a Increases range of work You can do these jobs yourself which you'd otherwise have to have done for you, and save both time and money. Stimulates pride of accomplishment With this saw, you'll derive the satisfaction which can be had only when you have done ai/ the work yourself the pride of the creator and builder Saves you time Think of much better how more work you can do, and do it more accurately; and of the real pleasure you'll derive from working with a tool which is designed right, made right and priced right No. 1075 Motor Driven Scroll Saw $36.00 If your dealer hasn’t one of these in stock and cannot supply you, write us direct. —— Jeweiliry- For roughin, out shapes or ornaments o! soft metal. A special at- tachment can be pro- vided to take ~ Jeweler’s Sav Blades. Inlaying- For the finest kind of inla work in both wood and so/t metals. Wood Carv- ing - For cut ting out de- signs for app lique wood work, Cabinet Work - For great varict of uses, suc! as cutting grills orna ments, toys etc., etc, GOODELL-PRATT COMPANY -%oZoniihc, GREENFIELD, MASS.US.A. GOODELL~PRATT Fol ole mi cielo) aie gele) &— sae ie

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r=" . 4 A. 6. GILBERT’S 2 Erector Motors Powerful battery motor in No. 4, No. 77 , I Famous EREETOR. Ses A.C. Gilbert's Olympic oe a epee POPULAR MECHANICS ADVERTISING SECTION 117 C Send for your free copy of Hello boys J A.C.GILBERTS SPORTS BOOK Tells allabout “worlds sports the 21928 EREC F OR ouldiauuine ' Send today for my free Olympic Sports Book. It’s it world famous athletes and Erector. Erector gives days you will never forget. Build with your own wonderful mechanical inventions, and have your operate under their own ~ Everything necessary co ae neath the cover of the bound chest. Oh _ boy! thrill building models ' vhiz and hum along, ‘J (rere ke the big ones engi- ’ ) : Er build. With its exclu- (ine nd feature patented / Y you can build and e airplanes, auto- es, trains, steam locomotives, der- bridges, hoisting nery, power plant construction equip- ol oa dose rip- Soe Autemahiie Chassis 1 a eet’ Why the New 1928 ERECTOR is the worlds greatest toy AC: 1 Patented Trumodel features Erector Square Girder, Like real cirders engineers use. Exclusive feature. Makes sturdy, strong models—ell Erector 5ets No, 7! Famous 110 volt Universal Motor in No. 8 Trumodel RAatS SPORTS TALKS Set and up t on these big radio Completely assembled gear box, adaptable to every po ble rear 66600000 O° Every Monday combination, and reversing movements Convertible t s drun - ie ° eoee hoisting engine Standardized for use with battery or 0 motor. Assembled in No. 4 Set and up Heavy, solid, steel truck body 14% inches long. Complete Exclusive feature. In No. 74 Set and up 6:30 Eastern Time, tral Time. Pick out on now New York Providence Philadelphia Washington Buffalo Pittsburgh Cleveland » 3% inch solid steel disk wheels. Balloon tires I lusive feat tic Giant Channel Girders Straight and curved I e ture in No. 77 and up NAIAau- Ww Detroit Lerze solid steel model building tray Srandard holes for mode Cincinnati building Exclusive patented feature Mar other ¢€ ! St. Louis patented features Des Moines Milwaukee Sensational New 1928 Features Denver Louisville 1—Multi-unit control Gives realism Insur uccessful oper ; Atlanta 2— Famous 110 volt Universel Motor tomotive models of Pulsa 3—Patented machine irame toundation Exelusive Erector Control : } cl ; B Houston part Adaptation makes possible genuine machinery mode every descriptri 4 Chicago 4 New Giant Channei Girder Straight and curved \ ple r re by 136 ha nd ches San Antonio patented Erect rechannel girder. embodying all its fe ire ; ae oston 5— Duplex Base Plate Double standard holes, possible t ‘ ‘ id steel. 14 A it Kansas City of two sizes and increase adjustment adaptabilit I — tatie s on entire Red patented feature truck body, id stee Cone Pulley, Helical Gear, Cams, Rac ete cactiileal ilding tra' roa Lidl ‘7 | rful motor, assembled 1—Dandy Beginner's Set. Builds 460 Know All About the EREr Po or it/ gear box, steel disk lel $1 1.00. Greater Erector ' | Delinan tires Gears and Big Red Wheels. Build Get the whole ster wheels, mMalLooOn ire 2 models. $2.50 with a series of exciting & * ~~ every automotive ac- THE BIG FOUR sports talks by Amer- ns Pp nies 95 Ibs Famous No. 4—Powertul electric motor, ica’s most far ~. - ith ° a _— mpletely assembled gear box, builds letes Coupon bri / tp scientifie thr ills for models $5.00. this free to you M: iil 7, — ae ha * New Big No. 77— Builds the Steam Shovel it today. every day in the year, teel model building tray Motor and r box Builds 727 models. $10.00. erris Wheel Builds 57 models. $8.50. 3005 Electrical Set—FHlectrifies and tuminates 5. by No. C Set—Erector Airpiane Set. $10.00. CIE. . ccccvcccocccccccecesoseces State...... - 7',.—Motorcized Erector Builds the The A. C. —— Co., New Haven, Conn. sis. Builds 747 models. $15.00. 63 Erector Square. - 8 -Trumodel Set 110 volt Universal Please send free n f A. C. Gilbert's Olympk Motor All features described above Sports Book and Gilbert t catalog Mo re parts. Builds 827 models. $25.00. : o. 10—Giant Fly Wh-el. Contains every esture Over 20C0 pieces. 110 volt Name ; 6osvenet eeeccces itor. Builds unlimited models. $50.00. . a" ; ERECTOR ACCESSORY SETS with PS6G 110 Volt Motor. “s Set—Big Girder Set Builds the eT rer rer Trt t

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—_ = i 4) POPULAR MECHANICS ADVERTISING SECTION — ee OHO) ) =e: ET pe oe) IE ORS OO 85-0 9 E Senay _ Model AJ $e

DPD) = N

(o) 0 Owed

h © — —

DK —_— a

his Christmas — et a Flying Scale * nee odel of a Real Airplane: , : ET the thrill of Model Building and Flying with an IDEAL Model of 2 Real Airplane! IDEAL Models are the most perfect. — of large Airplanes it is possible to make in Models that will fly. They are miniature duplic: ates of real machines, and are guaranteed to fly when correctly constructed. IDEAL Complete Con- struction Outfits show how to build them and

ie & Se SeO © $520 | x= —1a

: oS contain everything required; all parts and mate- 4 rials with Scaled Plans, full size Diagrams and nt - Patterns and complete Building- > ft. Flying Model of th« Flying Instructions. > “SPIRIT of ST. LOUIS’ An exact model-reprodu of the most famous Air] in the world st span; weight 10 oz Av derful filer when corre constructed. omplete c or struction Outfit . 67.50

x L Here are the most popular Mo yours new and get it for Chris — 5 Se P “a r Wan, ee Tee, eee 3 ft. Flying Model of the | iI onan ce A i pene FOKKER Monoplane A perfect Model of the tri- mote cod Mono yplane which

4

[eee

- ( a iander Byrd flew over js the orth Pole. Has all the 7 e 3 ft. Flying Model of the a mal features of Evew LE +4 } DeHAVILLAND vs sg the or al and is guaran- Airplane { } CECIL PEOLI An accurate Model, 1-14th ac teed to fly when correctly : H Racing Airplan tual size. The most po pt — constructed Outfit con- A handsome 3 ft Mor | S| . 7 ~ ; achit ie of Biplane type, eeag Soar taing emmert te plane made largely of A ; i 4 36 in. Champi onshi p Racer. to build and will fly wonder-* build and fly the Model num; can be assembied ~ | Flies far and fa Very easy full when correctly _con- - : , A satan and quic cl Just the M i i to construct. ¢€ a Con- structed. Gomngests Con- Complete Construc tion for yo —l struction Outfit $3.75 struction Outfit. .$7.50 Outfit...... wenn. « hae ~ te Ourht 6.00- 4 IDEAL Model Airplanes and Supplies for Model Builders are sold by Toy. Sporting Goods and Depart- ment Stores. Ask for them by name—IDEAL. If unobtainable, we will fill your order upon receipt of price. (West of Denver, Colo., and in Canada, add 50 cents to each price mentioned above.) Plans for Model Airplanes IDEAL AEROPLANE & Big Catalog Models & Parts any one. of the following Miadake SUPPLY COMPANY, Ine. cot acon tall insormation 8 —_ > Oe © Samal mailed for 25c: New York-Paris . Seale Models, and the mo yst con Spirit of St. Lovis FOKKER De Largest Ma ufacturersof Mod¢ 12 catalog of arts, Supplies ! t Havilland; Curtiss; NC-4° Se aplane; Established in 1911 and Materials for building all Nieuport, Bleri

or Taube he of Model Airplanes. No Model lit Ried ~ ae y P ~ oll Racer. ; atalog ‘of 26 W. 19th St., New York City for your oer right away. || — — Ga See ee ee ee er <8

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POPULAR MECHANICS ADVERTISING SECTION 11 THE 0O BOX of Gillette Blades = Fo Si, “ar | ey OE EVERY TIME HE ; SHAVES IN 1929 A | HE LL THANK YOU fl 5 ( SMART, masculine gift — box that’s bound to be appreciated all over again each morning. Generous measure ; for generous shaving comfort! Not a short-lived , present, not a frivolous one, but a soundly sen- \ sible, month-after-month gift that appeals to a = 9 ° 1 man’s practical nature. > |i sie ca sa vols es : And the distinctive thing about it is its new- t{ ness...it is presented by Gillette for the first time iJ this Christmas. You can be sure, when you choose ~ the Fifty Box for him, that he has never before . I received a similar gift for Christmas — or any other time. | Brand-new! . ~~ t P.S.—When empty, this strongly-built little > " « 1¢ famous doub ° ° | ry te : ' 7 :' capes perfect chest makes an ideal cigarette box for your desk. i Gillette Blades (o inl iiabamadine ift Or use it for stamps. Or even on your dresser 3 1 away in a sturdy, for collar buttons. Its usefulness is varied and its & ict, colorful box. An life is long. | il, personal way to : - _, me = ten lenwtthe Stow Sean, GILLETTE SAFETY RAZOR CO. BOSTON. U.S. A.

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120 POPULAR MECHANICS ADVERTISING SECTION — ge? en ae uy Ree aad } a Dae ei STANLEY PLan ! s How to Make a Model Sail ee A AG TPA xy Your aed is + safe when he is working Set No. 904; 12 tools— oak cabinet. Price $15. Set No. 907; 7 tools in cardboard box. Price $5. This set includes plans for making a tool cabinet. Set No. 902; 20 tools—oak cabinet. Price $25. with tools Fun for him—plus something more—this working with tools and wood. A chest of tools will keep your boy’s mind occupied profitably. Your boy’s spare time deserves your thought—your guiding in- fluence. And—did you ever stop to think—how few toys make lasting gifts? Tools, with Stan- ley Plans to get him started right, will keep him interested all year ’round—and many years to come. There are 25 Stanley Plans: STANLEY and wood boats, dog houses, tables, « work benches, etc. They 10c each at your har dealer’s. There is, also, o book “‘How to Work with 7 and Wood”. Your har dealer has this, too. You: it for $1. On the left are three t l Stanley Tool Chests. Ther 16 altogether, ranging 1 from $5 to $95. Ask your | ware dealer for catalog sl g them all. Or write to 1 free copy of Catalog N« The Stanley Works, A ing Dept., New Britain, ‘ TOOL CHESTS The all-year-’’round Xmas gift

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POPULAR MECHANICS ADVERTISING SECTION 121 = mw, ty @y > ! movement of the switch at any distance from the track and your CIONEL will start, and stop, and réverse itself at any speed, with the precision of a real railroad train. You don’t have to touch the train! It’s all done electrically by means of LIONEL’S marvelous 100% ‘“Distant-Control’”’, with you as the operator at the Switch Tower. Signals change, crossing gates raise and lower themselves, warning signals flash red and green as the semaphore arm goes up and down, controlling perfectly the movement of your train. With a ‘ LIONEL model railroad you learn the principles of electric om railroad operation—so true to life is every detail. And ee remember that only LIONEL can produce such handsome, BYMheans of Lionel’s 100% “Dis- accurate copies of actual railroad locomotives and cars! te7t-Control”” one or more trains Han be orereted on a series of . t — kly and »sitively con- See the wonderful LIONEL demonstrations at all Toy, Hardware, a aggre oo hon ak peat Sporting Goods, Electric, Furniture, and Department Stores. at the New Lionel Power House No. 840 shown above. 1g THE LIONEL- CORPORATION Dept. i 15-17-19 East 26th Street NEW YORK C)TY “STANDARD OF THE WORLD SINCE 1900” ELIE TRAING “MULTIVOLT” TRANSPORMERS Tools get ypical re are price hard- ing for a FREE~— 46 Page Cata = aL for the new Lionel catalog del Electric Railroads—46 STS in full color. Also send us *" name and we will write personal letter telling him should get a Lionel for nd how little it costs,

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122 POPULAR MECHANICS ADVERTISING SECTION C & L 158 This blow-torch is especially made and priced for the man who likes to do odd jobs around the house, or to tinkey with mechanical things. It will last a lifetime if it js abused. The usual retail price is about five dollars. VV hardware, electrical and automobile accessory stores have it—or can get it for you quickly. Look for the red handle Whatever you need in a blow-torch you'll find | in the Clayton & Lambert line PERHAPS you use a blow-torch only once in a while. In that case you don’t need a torch built for hard use on every kind of a job, every day and all day. And you don’t need to pay the higher price, either. Not when you can buy the new Clayton & Lambert 158. It’s a low-priced blow-torch, but we don’t know where you can buy a better blow-torch at any price, outside of the Clayton & Lambert line. It’s husky, with a strong, thick base that protects the tank. Everything in it is made to exacting pr: cision standards, so that it works right— and keeps on working right as long as it is not abused. It holds its compression. And it gives you a hot flame in a jiffy. On the other hand, if you do use a blow-torch in your daily work, we believe you'll find the Clayton & Lambert 32 not t better suited to your needs. For in addi- tion to the excellent qualities of the 158 it has the new, patented Clayton & Lam- bert gas orifice. That orifice is made t the exact size for perfect operation. And it cannot be spread and enlarged by the needle-valve. Nor can it clog; every time you turn the torch off, the needle- valve cleans the orifice. Blow-torch users have made the Clay- ton & Lambert line the most popular in the world. Hardware, electricai and sup- ply houses sell these Clayton & Lambert blow-torches — you can identify them easily by the red handle. CLAYTON & LAMBERT MANUFACTURING CO. Detroit, MICHIGAN

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POPULAR MECHANICS ADVERTISING SECTION 123

Lady's Dinner ring, beautifully hand engraved, lace work design. ISK Solid White Gold, 3 genuine blue white dia monds, 2 French blue triangular sap phires, £2.46 a month cr >

Caz cas rf } t blue white dia 18K Solid White Gold “BR ae #75°° n idy’shand en- engagement ring. i “Solid Wt te Gold gt ii8K SolidWhite “A. A. 1" diamond . mene . ster se HB phe chase ty Gcld mounting. $2.21 9. $3.96 » month Guaranteed Savincs finest-quality bluc engagement ring hand

: c cs white diamonds ISK carved floral desiy Direct Diamond Importations Solid White Gold Finest grade, blu mounting. $3.95 a m« white diamorn HF and volume sales, enable us to offer ones - nonaie ¥ you genuine diamonds, standard watches and exquisite jewelry at sav ing prices with the added advantage and convenience of dignified credit

_ ~ HOW TO ORDER — 7s , CA? $36 Just send $1 with your order and Handsomely engraved New,lady’s friendship your selection comes to you on 1 ite. >> é, ISK Solid White Gold ring, 18 Selig White Days Free Trial. NoC. O. D. to pay —" > ~ TT To wedding ring, 5 genu- Gold, 3 perfectly on arrival. After free trial, pay balance it > w - - raha > so 00 e bine white dia-_ matched, blue white in twelve equal monthly payments. cas *57 cao 875 monds. $2.38 a month. diamonds. $2.98 a mo. 10 DAYS FREE TRIAL The “*Mayfair’’ 18K Artistically hand « . A . SolidWhite Gold beau- graved 14K solid white Satisfaction Guaranteed tifully hand pierced gold, newest styk If not satisfied after 10 days trial, return lady's mounting. Fin lady's mounting shipment at our expense and entire deposit est grade, genuine fiery first quality, blue will be refunded. Written guarantee bond blue white diamond white ciamond ob. 1t with every purchase $4.71 a month a month All Dealings Strictly Confidential A Full Year To Pay! No extra charges Convenient You take no risk-satisfaction absolutely Credit at

guaranteed or money back

tely hand en- iand pierced anes 14K solid Green Solid White Gold . ° x Gold ring, 18K white for lo ue ‘ey, genaine ties FES MP, ALA. T is Cala we whiff iamond. { ms white — $3.88 a month FREE (ier llustratec catalogue of genuine diamonds; Bulova, El rin alt? am, Hamilton, Howard ll no watche fine Cash Prices ee

14-The “Princess Pat’, 14-K SOLID WHITE GOLD engraved case curat ey 15 movement. Ge ‘ WRIST

wel ACRAT” flexible bracelet Sa ee yewelry Iverware at bargain price Write now to get your FREE copy

CA12-The “Madam Jenny” atest from Paris, expressing lern vogue. Guaranteed Elgin vement. As dependable as it is } tiful. Supplied in GREEN JADE, BLACK or RUBY _ ENAMEL $2.83 a month

. 2 i .> a My SS Ss of : ag . - \ . : ; = De wes: on -covemmepevenransete ener pensseorgrensmenesesbeesvesssennemneer at: at < ily adver- r Waltham, Elgin o ‘ strap watch. CA1I6-Uitra fashionable, diamond wrist watch, hand « y engraved, Green graved 14-K SOLID WHITE GOLD case, 15 ruby and Gold filled case. apphire jewelled movement. 2 blue white diamond od 20 years. Radium 4 french blue sapphires. Genuine 50 rate and dependable. WRISTACRAT” bracelet; patented priced, $2.12 a month. safety clasp %? 79a month ROYAL DIAMOND annWaATCH Co. ADDRESS DEPT.11-M, 170 BROADWAY, NEW YORK, N.Y.

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POPULAR MECHANICS ADVERTISING SECTION Micrometer No.11, illustrated above is designed to have increased measuring capacity. The new shape of the frame at the anvil and spindle ends allows measure- ments not possible with ordinary micrometers. Good Tools Keep Production On A Precision Basis With American industry always aiming for faster production, there is the constant dan- ger that speed will lead to carelessness—that haste will make waste. Incre::sed use of precision tools reduces the dangers of increased speed. Brown & Sharpe Tools are at work all over the world making possible rapid work on a precision basis. Brown & Sharpe tool equipment enables manufacturers and mechanics to keep pace with the increasing demands for production, Ask your dealer for Catalog No. 30 listing over 5000 items. Or you may get a free copy from us. Dept. P. M., Brown & Sharpe Mfg. Co., Providence, R. L, U.S.A * PLANER AND SHAPER GAUGE No. 625 af —_ Pim . * STAINLESS STEEL RULE No. 350 —f) ) ~» *THICKNEss Lit // » GAUGI | 5 No. 648 /|* DIE MAKERS’ | ~~ SQUARE No. 552 * COMBINATION SE! No. 438 ip. * OUTSIDE SPRING CALIPERS \ No. 811 s ww * SCREW PITCH GAUC lo. 630 2 5 Z— * ADJUSTABLE SQUAI No. 554 * A description of this ¢ appears in Catalog No. 3 IBS «wORLD’S STANDARD OF ACCURACY’

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POPULAR MECHANICS ADVERTISING SECTION 1 PER

15 ia. wing spread. Strongly built, elf of Steel. Finished in two-tone gold and biue bronze. Strong spring \méter sends it s. 4n. model of spinning around floer, pre- O-date Sport pellers whirring. S$ 00 geri Spare hye (West of Miss. $2.20) pee Se rubber — r s. Speed motor. (West of Miss.

GI o . aa SPEED TOYS for CHRISTMAS! & «=< . UST a hint of the wide array of speed toys shown in the new Only 10c! Kingsbury Catalog. The most lifelike realistic toys you ever | mest i : Pte! 3 saw! Equipped with spring motors that give amazing speed and ma i et of a long service. If your dealer hasn’t these Kingsbury Christmas a od with novelties in stock, order direct from us. - ao Kingsbury. Mfg. Company, 83-M Myrtle St., Keene, F R E E : ing. Send for your - ms Moror DRIVEN Toys eee ir, 35¢. New Catalog foo showing over forty 3 » of the most inter 4 esting speed toys Fj Free for the ask

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126 POPULAR MECHANICS ADVERTISING SECTION

— $155 Weight 375 tbs.

THIS LATHE WILL —Do Turning —Boring —Chucking —Grinding —Cut Screw Threads —Make Bushings —Reface Valves —Finish Pistons —Bore Connecting Rods —Undercut Mica —True Commutators —and do hundreds of

oa | —-- 9" x 3’ New Model — SOUTH BEND Jr. | es | —ar-¥ > | ae mee St LATHE | 00 PST 50). ‘00 eo pa ed 18in. 3751bs. 31.00 12.40 155.00 |ment wich “four, Seder | 12" 23in. s00tbe. 32.00 12.80 160.00 |8ce'%ks Steni'mnthis| Ye-H. P. Reversing in. Ibs. 33.00 13.20 165.00 = yt @ period en ee 36in. 1S0lbs. 34.00 13.60 170.00 \mer’ j hy, Write for FREE Time; » %, Payment Catalog 40 Sinn 3 .— showing 5 57 sizes and types of New Tp, e 7. nt > Model South Bend Latheswith Prices,

, “~ “ me WW =

+, ae: ‘ DS ON Down Payments and Monthly Pay- a cog “8 %, ae ments on each size. Catalog also %, Gea Sars , shows larger sizes of lathes from iS *e 4» Mgrs a eee ee : ane 2p ~* : ly $18.64 r month , Wi en » Oe, *, Fill out and mail coupon. 9x3 ee Oe eee rentained f afm se * Motor Driven Bench Lathe, comple! Res 9N & ® OR, * SOUTH BEND LATHE WORKS Brin & MW 648 E. Madison Street SOUTH BEND, IND., U.S. 4 oT 4 +, New York City: J. E. Beggs Co., 183 Centre St.

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hreads itators dreds of | im the hop ricg Dp ation y. and 1% Shop iors ne d pte POPULAR MECHANICS ADVERTISING SECTION 127 “Hello boys / Tell’ em you built it with — Cr... GD>.. GJ s% 4 FP ae , here’s your chance to give mother and dad a real e. Build furniture, airplanes, toys, bird houses, and eds of other practical things. Tell dad you will start J ~ n, as soon as you get your Big Boy Set. Lift the lid & big red brass-bound Tool Chest, and you open up world of exciting thrills. Call in your pals. Oh, How their eyes will pop! Bos Builder’s Plan B ells exactly how each job is done, and ’ is a tool for every purpose. Find out way how smart you are with your Look over my Big Boy & ( sand Machine Shop outfits at yood store. Pick out your Set ut right in building wonderful When You Buy Your Tool Chest See that you get these Feature Tools Let’s Go vs, want to make things hum? Boys \ rand new Motor-Driven Ma- . Shop is the greatest thing I The big No. 780 is the treasured Boys’ Size made for boys since Linven'ed possession of thousands of Tred- 49. 79¢1—11 pieces with Plan Book, or. A complete scientific blooded boys. They wouldn’t swap : shop, combination portable it fora million dollars. 26 pieces in No. 701E—13 pieces with Plan demountable drill, emery all, 18 Ibs. of scientific fun, the kind Book, $1.50. _seratch brush, buffing wheel, you'll never get tired of. Chuck-full Ne. eet i with Plan Bo \nd—Boy, here’s news—this . of he-man tools for the boy builder. $2.58. ; . “. r , _ hool } lea No. 707—19 pieces includ P shop’s equipped with alg H.P. Two complete books show ¢ Book, $3.50. sal Motor for A. C. or D. C., with and exactly how to build Marsal ds No. 765—23 ’ ' a witch, cord and plug. Send the . ‘ear , er See Bis ° 2 pieces, Teal tools ; of wonderful useful things. See Big ianl aaweted R and get the booklet that tells you 2 ° rm , 1 > rds and pictures Boy at your favorite Poy Sh yp. — Plan B . -00. The New 1928 Line Includes These Important Dad’s Size Desirable Features : No. 780—26 pieces, real he re to get these big exclusive features in Dad size ¢ hests: bie cross-cut 1 IG BOY TOOL CHESTS have more and better tools than ar ther chest equal level, pane e lue t 2 Plan I $, br 2 \ metal spirit level In No. 765 and 1 ip. ces reg groans + } s ligt quality, ground face Blo K P) ane In N 765 No. 785 eynet ane , A ‘i ; Lup , i ieve ‘ 4 neh Plane. The kind that real carpenters use. in i br 785 and up. bound che $15.00. ‘ of _—s th Home Wo 1rkshop Book clot In all No. 790—3 pie plane, r Size sts. e as 6 vy 1928 Plan Bo . In all sets. . . 2 PI I 7 rpenter’s apron “is ali Dad Size Chests. —every needed toot : r ay, = hammers. In Dad Size Chests. che 1 lock, $25.90. Haws i letal Tray u— be. ase-hound Ches x Red ore s-bound Chest. ; The A. C. Gilbert Co., New Haven, Conn. A. C. Gilbert’s Olympic Sports Book 23 Erector Square. | want to know all about this greater 1928 Erector Sours ; hes . Lg ee rod » J % silbert’s Olympic Boy Tool Chests. Get the whole story, together ; ~ oo de ° ries of exciting sports talks by America’s most hletes. The little coupon brings this free book Name Just write in your name and address and mail the - n today. A. C. Gilbert’s Radio Sports Talks Street Suvi ePeeGbhe akin Sku ede aewaweeenine ry Monday night, 6:30 Eastern Time, ! 5:30 Central Time, WEAF and entire red network. See Station Listing Page cr seote ity —TRTTTTTLI LLL ° state

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128 POPULAR MECHANICS ADVERTISING SECTION fre res no tun like | Chemistry with EMCRA THE CHEMICAL OUTFIT “ oe a 7 Bea Boy Chemist! © [1 Work Wonderful Chemical Experiments in Your Own Labor: story—Start Y our Own Chemistry Club—Astonish Your Friends with Marvelous C hemical Tricks! ( ‘HEMICAL experimenting is the finest sport you ever had; shows you the wonders of chem- ical science, gives you practical information you can use every day and introduces you to one of the most fascinating and valuable scientific subjects—the Science of Chemist You can make soap, dyes, ink and paint; test food, water, soil and metals analyze lots of things and learn their chemical contents. Perform tricks of chemical | magic, too, and surprise your friends; and experiment with chemical sorcery and produce wonderful changes When you get your CHEMCRAFT you can join the Chemeraft Chemist Club and be the Chief Chemist of your own local Chapter and that means more sport! These new outfits are the finest ever made; more chemicals and apparatus, more and better experiments, liberal quan- tities of chemicals and nicer boxes and wooden cabinets Seven Fine Outfits to Choose from! Each is a complete chemical laboratory con- taining safe chemicals, all necessary apparatus and a Manual of Instruction Hlere are five practical outfits; select yours now. Look for CHEMCRAFT in any store where toys are sold; be sure you see the name on the box and insist on having the best out- fit If unobtainable, we will send your set, fully (CHEMCRAFT No, 2— are expla “w prepaid, upon receipt of price as listed here. ee 2 ee ane anual | ‘ I i c eces Oo apparatus wu id ea The PORTER CHEMICAL COMPANY and 181 experiments are repeated n ur 113 Summit Ave, HAGERSTOWN, MARYLAND given in the Manual of Price $1.0 | Instruction. Price $2.25. ia | a Fenn | . . rT * © ‘ Try Chemistr ‘HEMCRAFT No. 3—there are 40 different ° 4 epiais thee 25¢ Sot! » chemicals and pieces of apparatus in this FREE Magazine ‘ ' 4 . 1 fine outfit. 264 experiments are explained in { | Tak lot t “a , t £ nstruction . 5 , ; Mi , the Manual of Instructiot Price $3.50. for Boys! | oad 1 : s 5 of ateriee m™ ‘ ¥ (SHEMCRAFT No, 5—the ed s “1! Cheme: i most popular outfit of all. 60 : bh Ne - i chemicals and pieces of apparatu - or | i] pa th more than 375 experiments | i] explained in the Manual of In- al | struction. Price $5.00. i i 4 ‘ i 7 REF 4 | ieciiee| ! fam) it | (4 * r s > > > ait - ‘ ~ ry ay adit Cian Maen ital $4 You’re there with a CRO: LEY Genu tgevee battery type Ba i} $ MACOY’S SWinvow AC El r GEMBOX $6 | PASS CASE THE C ROSL EY RADIO CORP ORATION * Cincinnati, O. Powel Crosley, Jr., Pr: | Genuine Gold Corners | Morocco Goatskin STEEL . ae 1] | J Well made in every wa) I dges turned | d j and stitched; pocket for business cards 5 aLueLlite Diamon | Shrine or Masonic Emblem FREE. Gold Hy stamping. name and address, 35e per line . e\tra. Clipthisadv.andenclose$ibill. 5 Window Pass Case $1.00 9 Window Pass Case $1.50 1 Carat Elite Diamonds. t 13 Window Pass Case $2.00 for their dazzling rainbow _brill You'll be delighted Elite Kh . another dollar for beauttful solid gold pass all others Stand acid ar S. or Masonic Pin (Rea. $1 and ash pond Handsomely agecendiive yr Catalog **8'*— Jewelry, Novelties, Leather - sterling Guaranteed. | 0OKS like ‘5250.1 00. ods, etc. for Xmas gifts Collar and Cuff Links Given - owner offe mes $85.00 M ACOY PUB. & MASONIC SUPPLY CO. [ | combination ans 1. od pe small Elite ci sei, oh 35 W. 32nd St., (Est. 1849) New York eee tage hy, A. an SS ie pects ELITE JEWELRY HOUSE, Dept. 161 2, 6343 $. ‘Ashland Ave. Chicago th,

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POPULAR MECHANICS ADVERTISING SECTION 129 You CAN BUILD ...... Worth While Things ONLY WITH Worth WhileTools % AR=CON UTILITOOL ——— 8.00 ll veel) ) ] | Whether your objective is profit, or merely - | the joy and satisfaction of ‘making things,” Easv Terms . ° . . a * 5 | the degree in which you realize your aim is — 4 Ar-Con Utilitool units may be purchased dene . ran , , al; 7 SY singly or in any combination of units if the | dependent directly upon the quality of your AR ee ee e eee ee netugresl at the star workmanship and the ease and speed with which it Moreover, the purchase can be made by con- is accomplished. And these in turn are dependent enient time payments, if desired. Send for = , s oo al fully illustrated descriptive circular and com- ipon the quality and efficiency of the equipment plete price-list, with terms. The coupon is for > vou have to work with. | your: mn a Che Ar-Con Utilitool was designed to squarely meet ‘ the need for a home work-shop that could match the results of commercial equipment—a work-shop tT = ‘ ae be . built for strength, and as non and durability rHE AR-CON TOOL CO. under constant hard usage. Its sturdy one-half 500 Fassett St. Poledo, Ohio a horse power ball-bearing repulsion-induction type r---------------- ame we al motor—the most efficient type built—provid " ; ‘ : | } ¢ 1. . | | The Ar-Con Tool Company, } uundant power for any work the outfit will be wise ae oe H 1 . | 500 Fassett Street, Toledo, Ohio. | ca ed upon to do. i} rhe complete Ar-Con Utilitool consists of a rugged | Mail descriptive circular on Ar-Con Utilitool, with motor-driven lathe with full accessory equipment | prices and tern including grinding wheel and cotton buffs; a circu- | lar saw table; jig and scroll saw; sanding dise and | Name 08. table, and all necess: ry accessories. Here is a work- i ‘ shop. that will do everything you ask it to do, in | Street Address. ..........+++0008. the way you want it done. City and St >. Tih el | M

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130 ME Me Watch Dog of Power CHROME, a preservative, guards power when your Burgess “Super B” Batteries are not in use. Thus extra life and serv’ce are added. The valuable properties of Curome in lengthening battery life were long known to scientists, but it remained for Burgess engineers to discover the secret of utilizing Chromein battery construction. The year’s noteworthy achievement in radio enjoyment and economy is the Burgess “‘Super B” Batteries CVO DEVO DPD FOOD FOOT OOOD FOE OS OF FOOD **Super B’’ No. 22308 is a medium size heavy-duty 45-volt battery designed for general, all around use. **Super B”’ No. 21308 is the largest size Burgess heavy-duty 45-volt battery—made especially for heavy- current consuming sets. POD TWOP DF YOO DE WOO DF WOO DF WOL OS WOODS YOO DT WOLD These two “Super B” Batteries answer practically all radio set requisements. BURGESS BATTERY COMPANY General Sales Offices: CHICAGO In Canada: Niagara Falls & Winnipeg BURGESS “SUPER aan BATT POPULAR MECHANICS ADVERTISING SECTION SAVE $10000 ON WORLD'S FINEST CUSTOM-BUILT SETS! This new 80- page Hi-Q Con- write for this Book set selling for $59.00 to $100 00 struction Man- more. ual is the most importantradio book of the year shows you how to save at least $100.00 or how to make a big, steady in- come through the New CUS- TOM-BUILT Hi-Q Receivers Junior Hi-Q This greatest of all Hi-O Man- uals is complete with text, photos and dia- grams. Covers every detail of Hi-Q building. Gives full inf. or- mation on power amplifi- ers, short wave adaptors, in- S i= - ia 2) if av soe Ng 29 at $54.35; Sstallation, Junior A.C. Hi- antennae, house O 29 at $103.95; Master Hi- wiring and a wealth of Q 29 at $99.50; Master A.C. other data. Shows you Hi-Q 29 at $151.80—4 won- how to save mone, derful completely shielded your own set and how to ‘coast - to-coast’’ instru- make money building for ments acknowledged to others. be the last word in sen- le . ° rice 25 cea sitivity and knife-like se- Price 25 cents postpaid lectivity Write for unequalled ; yourcopy to- in tone qual- MHammarlund day befor ity by any Roberts first editio: ready-made is exhausted Ou sore a oy) Hammarlund-Roberts, mM 1182-X Broadway, New York City i F RE — CATALOG Includes complete yarts for HF ISOTONE N TYRMAN “80.” MADISON- MOORE “AC.” New TH« DARSON Power Amplifier. Also write for Special ¢ | on the World's Finest DYNAMIC SPEAKER. Dis« for Set Builders. ' CHICAGO RADIO APPARATUS CO. 415 S. Dearborn Street Dept. Pm CHICAGO, iLL CHI - RAD’S NEW 1929 Just what millions of homes have been waiting for. 300,000 already sold. Write tomy oo life size picture and A ie r num ON LAMBERT MFG. CO., Wichita, Kans. an ns You Let meshow you how tomake big money right from the start. I've prepared a FREE book explaining ail details. First week's profit pays for all equip ment. You can get all the battery chars ing business in your community with my Service Station Charger—it s years ahe of ordinary chargers—handles 50% to 70% more t teries. I expl iin everything—start you ina business of your own and put you on the way «n = to big money. Write for FREE Book. Cc. F. HOLMES, Chief Engineer, Dept. PM Independent Electric Works, 5116 Ravenswood Ave., Chicagc

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— ‘ST rs! ing for $100.00 eatest O Man- mplete texe, nd dia. Covers ‘tail of lilding. l infor. non m plifi- ‘t Wave Ss, in- tion " » house ith of ‘Ss you Wy on how to ing for [paid te for Opyto- Yefore edition austed irk City GIANT BLOCK SETTING CRANE In harbor construction work great e] cranes are used to place 200-ton crete blocks in position on the sea bed. All these operations are repro- luced in miniature by this Meccano rane operated by the two-way elec- ic motor, 686 Models and a Two-Way Electric Motor to Run Them for $5.00 Shown above is the famous No. 1X Meccano outfit which contains hun- reds of precision parts; four big swivel base wheels, braced girders, plates, trunnions and a complete book ! instructions, The Set ti magnificent 2X special Leader iat all the boys are talking about uilds 734 special models and has the ‘elusive Meccano reversing electric tor. It contains a set of four solid Massive tread tires giving the last word n realism. This set costs $10.00 and is packed in a fine wood cabinet. Get Your Meccano Set Today and Join the Experts. } potened two-way electric motor isa re This i of workmanship because it embodies all uiples of construction of standard types. gear clear idea just how these gears mesh. Prominent automobile schools use this Meccano model in their classes. compensates for difference in POPULAR MECHANICS ADVERTISING SECTION 131 bly gives a splendid, The differential gear is a device which transmits the power evenly to the road wheels and ai the same time i Makes MOST... BIGGEST... and BEST MODELS Construction parts that satisfy the expert never have approved the construc- tion of the New Perth Amboy (New Jersey) projected suspension bridge if they had not been able to examine a scale replica of it made with Meccano. Meccano is the equipment that graduate engineers and ar- chitects employ to make their scale models; it is the choice of the experts, and if you wish to build models for real fun, or for profit — as they do — you must join the experts. [ies U S. War Department would Cast your expert eye over this automobile chassis shown above. Here are only a few of its speci- fications: geared transmission operating three speeds forward and reverse ; positive differential gear; Ackerman improved steer- ing; friction clutch; torque rods; foot brake on cardan shaft; in- ternal expanding brakes; radia- tor fan; semi-elliptic laminated §&% springs;dise wheels; Dunlop tires. Junior engineers the world over prefer Meccano in the ratio of one thousand to one. Meccano’s pop- ularity is no accident, but founded on solid worth. Make this test your- self. Compare Meccano’s flat stee! strips and girders with any others on the market. Note particularly the equidistant holes set one half inch apart and micrometer tested to the 1/1000th part of an inch. Whether you purchase a small Meccano set for a dollar or a de luxe outfit for $17.50 only one quality is used throughout —the best. A new leaflet containing detailed instructions how to make the motorcar illustrated above—easi- ly understood diagrams and clear directions make it possible for you to build your own car from radiator to rear axle housing— as well as countless other models just as interesting, is free for the asking. Just drop a penny post- card with your own name and address to MeccanoCo.,Inc., Div H, Elizabeth, N. J. In Canada: 45 Colborne St., Toronto. Over 43,000 hours this famous clock made of Meccano parts has ticked away, varying no! more than a few seconds a year will be sent free A booklet describing how any boy can build this cloch to all who wrile for u. WEE Ce AN@D THE TOY THAT MADE ENGINEERING FAMOUS

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132 POPULAR MECHANICS ADVERTISING SECTION

SS ~~ % ~} aS Xa : ‘ > Televisi LATEST CAS Pe. . ; aa aS Catalocue RADIO \ QZ \y as . CIRCUITS \ ey Roe . \ \ y oe Supplement 500 —.. \ eee any ILLUSTRATIONS nL \ ee N BUY FROM RADIO’S OLDEST

Be s t this gr 14 MAIL ORDER HOUSE net pri We are the ok de st ests —— exclusive radi Radio S} ( ra mail order house in the country. All orders are parts mail ' positively st vit ped within twenty-four hours é . . quick, prompt, courteous service. We cart 1 larger . A variety of radio parts, radio instrument iccessories \ I r € —s radio findi gs than any other rad » house in the We are ready now to appoint a You will find in Catalog Ne 18 the lar est assortment of the country If radio merchandise in this countr Radio Spec t earrie radio merchandise more ratio *) rt ind rad terial t n ar ther house in ' : ; ; : the country. You will fin iin th atalug positively the largest We carry the Largest Va ma Fi variety of radio merchandise BUT If you ar n need of tain small rad arts ¢ t * j a periathere, anything from 8 werew go copper ribbon, telephons diay acm RADIO SPECIALTY CO parte there a t fr & acrew to ppe telep lia; Agms, as well as thousands of the small radio findings *9 St. NEW] RK

ee he —=— tenes of High Quality Condensers and . Resistors “THE RESEAR WORKER-—A F! MONTHLY PUBLICATI: Set Builders, / 1¢€ meet »50-tube ar problem. pu seule cult AMERICAN TRANSFORMER COMPANY * ME Transformer Manufacturers for 28 Years 24 Emmet St., ay N, J. (Dan -Ashe Radio C) J 206 N. 10th St. Ry’ St. Louis,

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POPULAR MECHANICS ADVERTISING SECTION 133 — ee — - | you | Ssess | this ook [ 7 he 100 inch Hooker Telescope Uc. Wilson Observatory >. 1 h has increased the known D. 18 erse by half a billion stars. | ! movable parts weigh 100 rite » but can be regulated down | minute fraction of an inch. f The telescope is a symbol of H or spreme accuracy. It in turn is i lependent upon a perfection of ! VI _ hanical workmanship in sion chich Starrett Tools play a i ] t part. | Logue _ T ] i or Ip Nement to » 1d youll find Starretts Search for the underlying causes of the which such progress would have been ma- breath-taking mechanical achievements that terially impeded. have spurted human progress over the past Tool dealers everywhere are glad to seil you three decades and you'll find principal among genuine Starrett Tools. . ar - = - them the development of the art of precision There are over 2500 Starrett Tools, some of ee workmanship on a grand scale. which you need to do better work more easily and with greater satisfaction. Your tool dealer APHS— The L. S. Starrett C y takes sincere i he. OS. Starre ompany takes sincere has them. Ask him and write us to send you a and honest pride in the fact that it has given free copy of the complete Starrett Catalog to industry and engineering the tools without No. 24°*AP”’. THE L. S. STARRETT CO. World's Greatest Toolmakers Manufacturers of Hacksaws U nexcelled Steel Tapes —Standard for Accuracy ATHOL, MASS... U.S. A. 5 0. 2208

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Pocket Gen There, in one word you have the real POPULAR MECHANICS ADVERTISING SECTION

with thi a plane, to the Westclox Pocket Ben

Do Away with ee

Large or <n urfoces eas smooth action of belt five times faster than by hand. | “Machine Tool Builders for 20 Years "|

oor pla f Hand Teav ng a flat even fini or refinishing furn tur woodwork, stairs Bor or Works from any jin ( No experienc | PORTER- CABLE MACHINE CO. 1704-10 No. Salina St. | SYRACUSE, N.Y

Bis value [N KOGRAPH retrens roa 10 DAY FREE TRIAL R) Writes with ink smoothly, answering ourpe se of pe ase pencil Never SAME SIZE AS S, scratches aks or dries $7 anoSfQ75 Makes 3 cuban copies T 8 at one time with orginal FOUNTAIN in ink. PENS & WARD SMOOT™ SEND nO goss I CAs une °@ $1 Ip ao we stage. Sent prepa eo cont ont with ore er Money bt kift hed, within 1¢ + catrogvan® 9 write for tt re Sales p | r

INKOGRAPH COMPANY, INC. 649 Centre Street. Ne wi t--no inve stment- ne

or permit to own this reason why Pocket Ben is in high PE 6 shot Automatic Use favor with millions of men. Right— on time! A thoroughly dependable, *WITH You need no license NoPermit or fun or self-detense. neeps aw Secmee. Frightens thieves, scares away jogs--a real home protector. Fool your riends. Same as an e xpensive automatic in construction, finish, appearance, durability; automatic magazine loading and ejection of rteidges. § instantly and powerful report. Guaranteed absolu ty safe. Send 26 aw Coy - to 88 for automatic

precision-built timepiece. Neatly Stn bar ewtetiaee. 2 ey Dept. 23-412 finished GENUINE LEATHER HOLSTER FREE designed. Handsomely Attractive and trustworthy. For that boy of yours— Pocket Ben is just the gift for Christmas. Boys like what men like. Built by the makers « WESTERN CLOCK COMPANY La

With Motor windshield of anycar. 1500-40 Knowlton St.

WOODWORKING MACHINES Den and othec Miiisclen Cabinet Shop Special No. 19 Salle, Illinois sd ‘290 lows You ought to have this Neu handy Parksin yourshop . 5 | Compact, complete n Auto Clock oti e desiened like a bie ‘ . | ore pt we pane yer gt he Good looking - | : at Floor space require nike convenient—reliable. 72in. Does any kind of cabine Quickly attached joinery work. Write for circular to dash or above The Parks Woodworking Machine Co. | Canadian Factory: 333 Notre Dame East, Montreal ]

Cincinnati, Ohio

(et Ser Mi ( in 0 an)

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tic

POPULAR MECHANICS ADVERTISING SECTION 135 FACTORY TO YOU-SAVE 50%-COMPARE WITH COSTLIEST OUTFITS BEFORE YOU BUY oy a powerful new Mfj,-; aie = 3) DAYS AC Electric or Battery Get Gur Send No Money 9th Anniversary \ Offer! rvelous new, iranteed, lighted 1-dial \ll Metal Super shielded rom cabinet.

RTS On Choice of Cabinets AC or Battery Sets 30 Days’ Trial

f>Ric chi assigns A. ~ uine wal- =ae_ ty 7. foe a. A type. Elec- ‘i = ee em tro - dyna > mic ormag | netic puw- | er speaker racefulSpinet [" 70)” J

AC-9 vith front switch, built-in AC power sec- zraph pick-up connection and all latest features AC tubes and cabinet extra

FREE

Latest-Powerful.New | ARACO Cathedral Toned, Super Selective, Long Distance Getters ry ets : * Battery or ' Electric ac S Electric ‘elebrating its 9th successful ur, edge _—_ selecti with its costly e America’s big, old, reliabl R audio «sturdy nstr Stent features, on .. Corporation springs a genuine nsa- including pl ywraph pick-up con- tion in high-grade sets W it! its nection, ease of tu ‘ing, beauty, and 715° latest, Super-powered, 1-dial Miracos econom 1 Miraco will make you the All Electric wholly self-con- the e1 f many whose radios cost + tained, hum-free, AC-8 and AC-9, 2 to3 times as much! — using AC tubes or the nosctiupesemesne Many thousands of . new S-tube Ultra ior . Mira s- yught ter C-9 batteries or Eliminators BIG DISCOUNTS 30 day | 1e compari- $8375 —you are guaranteed Fx ve 1 . sons—are cutting bee the greatest val res and to User-Ag , ' through | als ani! get- savings in the fine set - ; ting st to coast, Cane field BATTERY OR AC i, Cuba, Mex with

, ~ . . 1 Compare a Miraco with § ELECTRIC Outfits

the tone and power of highest-priced radios, for a ec wtly sets Miracos are 30 days in your home. Surprise and en- laboratory-built with finest parts tertain your friends ret the opinions and embody 9 years’ actua! expe- Unless 100% delighted, don't buy it! Re- rience in constructing fine sets turn everything —the complete ¢ t t Approved by Radio's highest au our e\pense Your decision is tinal thorities absohitely! Only exceptionally fine radios, « — ‘latest approved type, at roch (the Deal Direct with Big Factory mm prices, could possibly back up so) Eeyervythir re es 1 splendidly Metal “ liber ally unconditional a guarantes i ir t itol t ir “ nd coupon how for Amazing S} il £ Fa tory Offer! tant enthu | the outfit 39 te la then decide Liberal ear finishes Don't Confuse with Cheap Radios = eusrantee one << Play ents a irat Elec With its rich, clear ( athedral t ‘ lots oft t insure satisfact ’ ' hi um-tree operation tremendous dealing d tw I i € “kick yn distant stations andr ” builders of f t ith sueces ilyear MIDWEST RADIO CORP’N, 407 RD stem Bidg., Cincinnati, Ohio, U.S. A BEAUTIFULLY ILLUSTRATED CATALOG, AMAZING SPECIAL FACTORY OFFER Testimony of Nearby Users — All the proof you want four honesty, fairness, size, financial integrit)

_ © radiv experience and the performance of our sets including Amazing Factory Offer—sent with catalog

el MIDWEST RADIO CORPORATION THIS COUPON Pioneer Builders of Sets—9th Successful Year IS NOT bd 407-RD Miraco Bldg., Cincinnati, Ohio AN ORDER WITHOUT OBLIGATION, send free catalog, Amazing Special Factory Offer, te_timony of nearby users, etc. © User Agent Dealer Check here if interested in an EXCLUSIVE TERRITORY PROPOSITION NAME ADDRESS

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136 POPULAR MECHANICS ADVERTISING SECTION

rendering i visible in the LIANT IT ‘shikes.” % = Quite simple to vee. tons or switch pla sizes, and $1 postpaid. JOHNSON SMI LUMINOUS PAINT Make Your Watches, Visible by Night wri iii: precticaly uncbini: able sep st ao exorbitant price, we have at last easceeded in LUMINOUS PAINT, which, applied to the surface of any article, emits rays of white light, k. XMS DARKER THE Hueity. THE MORE BRiL: of your watch or clock will enable vou to tell i the im, time by night tee of your electric lights, match boxes, and innumerable make 33 ‘our own Luminous Crucifixes, Luminous Rosaries, etc. Smal! bottle, price 25c. Large

Clocks, Etc., producing this remarkable A little applied to the dial You can coat the push but- otrer — you can do it. TH & CO. . 830 RACINE, wis. wis.

CIGARETTE MAKER Roll your own and save money. Better and 6 gute eaves more than

NOVELTY BADGES

wear, 7 y rte to their trifling. coat ie. 3 tor 25e, or per anywhere.

GREAT Bmaliest Uible in the Worid. Bise of & post- age stamp. 200 Pages. Baid to bring luck to the owner. A

Make good money riends, church acquaintances, be seen to be taved. omming | oom to Sc oe. 3 for 40c, 12 for Ee ‘loo for $7.50 “te with gold edges. Price 50¢ © $1.25, $4 “80 vor Gos.

w ithabunch of these bills, it is easy for each person of limited — to ear

ro time and peeling oft a genuine bill or two from the outside of the roll, the effect created will be found to be all that can be desired. Prices, postpaid: 40 Bills 20c, 12 50c, er $3.50 thousand postpald. MAGIC NOSE FLUTE The Magic Nose Flute, or Hu- manatone, is « unique and novel musical inetrument that ie played with nose and mouth combined. There is just a little knack in playing which

Post quired after a little prac- : tice, will enable you to Paid produce very aeweet that somewhat resembles a flute. There ie no fingering. and once you have maste ~ gon @ eon play all kinds of music with facility Wouen played as an accompaniment pare or any other musical instrument, ‘ect is as charming as it is surprising. music thes

GOOD LUCK RING quaint and finish ; skull and ecrosebones design, sparkie out of the eyes. Said to zo Saverste brand of tobac- Very strik seful, handy. | uncommon. Pocket™ size, wee 4% os. Made lated" 38 rts. two brilliant, nickel plated S03 7 65c postpaid anywhere bring good luck.

seeds omit Py Stomen, Coin, Money Order, end Pore! jen Stampe sise oc accepted.

Exploding Cigarettes JUST LIKE ORDINARY 9 ARETTES. BUT REAL STARTLERS! Tie arettes of excellent flashing geme They ays! -— tte ie nba Soe-third nh per Ss one-t amoked, t vietim 25¢ ppd. gots a rye great surprise it goes off with a loud BANG! A great mirth provoker yet entirely harmless Price 25¢ box. SURPRISE MATCHES

More fun than fighting with your wife. Look just like ordinary matches. Put up in boxes just like reg- 10c*! ular Safety Matches As the victim tries to light one he gets quite a surprise Piles 10¢ per box, 3 boxes for 25¢, 12 for yt 75 cents.

The lever leske eannct & be Keyless opened unless

Lock you know the eombination. No necessary. For ‘aed logker bieyele, too ebest. mail box thousands of Bhackle and tumblers nickel plated. Weighs trifle over one ounce, Bmall yet arena, Becret and fu c instructions with each Ls r 3 tor 65c postpaid. Postpaid

Wonderful X-Ray Tube erful little nstrument pro- ducing optical lilusions both carers and sheep startling. ¥ you can see what is apparently the ow fingers, the lead im a lead pencil, ry — ior opening in & pine stem, and many other similar illusions. A mystery that no one has to satisfactorily explain riee 10c, 3 for 25c¢, tdosen 750. Johnson Smith 2 &Co. Every Boy His Own Toy Maker A great book for boys. It gives plain, practical instrue- tions for making all manner of

toys, machines and other ar- ticles, amusing and useful Telle how to make a Steam Engine, a Phe eaare hie Cam-~< era, a Windmill leroecope, Electrical Machi .. Galvanic | Battery, Electric T Seocrank, i Electrotyping fpparatus. Telephone, Kaleid: eco) Me agic Lantern, Aeolian Harp; way to mal ° Boats of all kinds, Kites, Balivons, Paper Toys, Maske, a Racks, oaty na, Carts, Toy Houses, Bows and Arr Pop Guna, Slings, Fishing Tackle. Rab hit « an 200 illustrations Postage Stamps accepted. Serpent’s ; Box contains 12 eges. When lit with a match, each one gradually hatches iteelf into a enake several feet long, which curls and twiste about in a most ee manner rice per box, 10c postpaid, 3 for 25c.

JOHNSON SMITH & CO. RACINE, wis. 1929 CATALOG on receipt of 25. ‘son eee ong better than ever. Only book of ite hina in of all the latest tricks in magic, the newest rubber stamps, unususl and and plants, etc.. rocurable

unprocu Cnreck, etc. Unused LANK CARTRIDGE PISTOL panoaiel Otter Leena? eamgas) 4 nae givatoal 100 Bleck Cee and 5. ae Catalog of latest aoveltien Pall for Shi by E oni Cannot go

cel " SOc per Special Holster (Cowboy Type) for pistol 6Oc. THROW YOUR VOICE Into a trunk, under the bed or any- where, Lots of fun fooling the teach- er, policeman or friends. THE VENTRILO a little instrument, fits in the mouth sight, for Bird Calls, ete. Any- one can use it. Never Faiis. A1l6 e€ courseon ventril-

pa _ oquism, the Ventrilo, ALL FOR 10 CENTS It is made in the shape of and looks like a segelat Automatic Pist one is likely to stop and ask you whether it is real or not. Thue

to prove itself very handy in an emergency On pressing the trigger opens up as shown in the Hlustration at the right, revealing nine © * articles—Opera and Field Giaas, leleseope, Mirror, Magnifying Glas « Burning Lens, Reading Glass. Sun Dial, Sun Compass. ete. In t of the re er there in_a place for various pocket necessaries, eux Aid Articles, Buttons, Pins, ete. The Pistol ie of sheet metal, blue that can he carried comfortabiy in pocket. PRE $1.00 postpaid

tion of « ca tol; acte ‘ EAL CART! ES of miniat te IMustrati . actual « ‘ tnuches } “—¢ at e ttac ate Loads like s regular pistol. Pull the trigger and it goes off with on i uc Pistol ie break open type; illustration shows position for loadin entirely of high grade steel, nickel plated, ag barrel, hand ’ engraved handles, complete in box Ra Se en PRICE $1.75. oy toe nar wit! handles per bes of 35 nS DRNSON NSON SmitH & Cb., Devt. 830, RACINE, Ww! MICROPHONE T TRANSMITTER BUTTON hiy eenenve d ter Button t You can ensity make a b phone by using thie Tranem the sound w You ean build your ow without beries expensive equipme:t. It i and inexpensive Kou ean install ai outfit home and hear conversations being held al! « house You can connect up different ro« hotel This outfit was w by secret » operatives during the war. It is being weed stage. It is ultra-sensitive and is the great vention in micro-phones. You ean m button almost anywhere—eard board box ipes, stiff calendars, on the wall behind « rame, ete. Button is eo light and emall it « be detected. Persons can be overheard + suspecting it. You can listen in on convers in another room. A deaf person in the « can hear the speaker. Connected to pic piano or other musical instrument, musik heard hundreds of feet away Button may used to renew te! tranemitters: often makes an old line “talk up” when nothing else eal microphone for radio use; carries heavy ourrent and is extreme!) tive. Amplities radio signals. Countless other similar uses will « themselves. Experimentere find the button useful for hundrede of mente along the lines of telephones, amplifiers, loud spenkers, ete fascinating stunte aoe J be devised, such as holding the | button agai throat or chest speech without sound waves. PRICE $' JOHNSON Smitn a & "Co. DEPT. 830, RACINE, W

BLANK CARTRIDGES 50c

s. r

0 Ss

Pi P.

rw

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POPULAR MECHANICS ADVERTISING SECTION 137 REMARKABLE VALUE IN WRIST WATCHES | MAGICIAN’S BOX OF TRICKS Apparatus and Directions for a Number of Mys-

} a nog : Enough for an re Ev rs en . $ 00 OW ANYONE CAN DO THEM It ie great fun mystifying your friends. Get this Conjurer's Cabinet, and you will | be tue cleverest fellow yous _ You may ges True Lover’s Knot,sym- Me hawe @ lot of E, wis. bolic of love or friend- ; t fun, with thie . little . 'N ship. Very pretty, yet A | show not showy. Each rin = a Tne | : regula Nolen made by hand by golc pe andstarts to grow ‘ j Made entirely ROven ; in 20 minutes. Taken ‘ netal, hav- atsTy wire expert. It | out it dries up and , img 8 mitt good and it ts good. goes to sleep till put 4 lens Oe ey tae in water again. 10c, 3 “kt f seed into one ots 0 larmile in a Price 50c postpaid for #5c, 75e dos. p pd 4. While [amusement wearing the "an the victim is absorbed in admirati of the ee tty jrings Made in a | Great Fire Eater | SQUIRT ROSE | 222 P22 2282 Reconkett [finish (to, resemble plati- expectation ao io brought tnto # tion, and the |DUM), with wording on - A great trick by Cherrver experiences a very ereateurprise §0cp.pd. |enameloid, as illustrated. = RB which you hn 25c Johnson Smith & Co., Dept. 830, Racine, Wis. |Price only 25¢ Postpaid. parently reatue 6é be . fire from mouth, to The “Little Giant’? Typewriter ve sternation of all.) A First Class Writing me Quite harmless. All) Machine For $1.50 apparatus neces- A perfect little typewriter for $1.50, te sary sent complete } There are thousands of persone whe X for ONLY 30c. p. pd. JOHNSON SMITH would like t ~ n typewriter == Whose needs a: ueh-eme - he ad SEEBAC KR fant tee @tpeuse ettached to the pur ¢ osco bE chase aud use of « fifty or seventy-five dollar machine lo such persons we jeations sce this A REAL STARTLER. This ie the confidently recommend owr Little instru. most popular of all equirt tricks. The Giant. Itie strongly ‘ ode, but emote ‘ to your flower in your coat looks eo fresh and in construction, so that anyone can ’ see what t pted to inhale qitick'y learn to operste it, and write ‘ a be the deliehasal Sohane Then e i me as rapidly as they would with pen ll your back. ment to prese the bulb. Geewbillikens. aod ink. The letters of the alphabet resting Don't yump? here is a very long most frequently used are so grouped as to = - one to write rapidly, the numernle oa ae ~ 3 easily reaches tét i to 10, and the punctuation marks being together. With this machine you can send od " et your coat or troweers, and the your best gir! typewritten love letters, address envelopes, make out bills, and do almort Ry i ke you ore techine. Just like hav- enowgh to make a dosen any kind of work not requiring o large, expensive machine, With each typewriter inet tbe eyes at the back our head. — oe one loading. PRICE 25¢ at ~x! a tube of ink and full printed instructions for using the machine. Price com- $1.00 PRICE 25¢ postpaw for 65e pespaid. $1.50 by mail postpaid to any address in the wortd.

ca “kta teers JOHNSON SMITH & CO. > Racine, Wis.

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138 POPULAR MECHANICS ADVERTISING SECTION Stages the button “ and let the ‘MOTROLA . wind your phonograph The Motrola is a small electri: motor that replaces the winding | crank on your phonograph. Read- ily attached to outside without marring the w work or affect ing the mechanism. Merely pre«« the button and the Motrola winds your phonograph more quickly and evenly than you can crank it 1 Stops automatically when spring | 4 reaches proper tension. | 1 Your (ld phonograph with Motrola Paint, Whitewash, Lacquer, Insecticide, ish, Stain, Disinfectant Compressing Unit At- tached to Spray Gun 3 and e eectric pick up to your radio use In the | gives the same results as the costly home, factory, new machines. QUICKLY, EASILY APPLIED Anyone can apply or detatch the Motrola in a few minutes, using garage, shop, farm, If you prefer hues ‘ r elate to buy di- Pl igs into any « le rect, wewillship ete. tric S« ket. At your deal- postpaid anyv- only a screw driver. Winds any mak ’ “8 : or size of machine. No parts t& er’s—or direct from us. where in the U. S. A. Just for- wear out—costs only a cent a month The Atomister Corporation ward check or for electricity. Attractively finished equipped with light socket plug money-order - - with vour name and 10 feet of cord. Sold with our . alifie ruaré re. Thousands anded- 6 a unqualified guarantee rusand A! now giving dependable, labor saving dress. Spe- >) ; . >»: e service. Ask your dealer for dem- cial Price 4 . onstration,. Write us today for illustrated descriptive folder 32 Hamilton St., Rahway, N. J. Model B Compressing Unit Sep- arated from Spray Gun JONES-MOTROLA SALES CO. Dept. 112, 370 Gerard Avenue New York City EDW, Tava | { MEN WANTED >\ ecome |! facit g contr tors ARDS i telel ai fe! || de ser es $30.00 yer day——no lay “ofl you | . yr | increasing—New \me | yY_* | | finest work and are easiest t } | I at a a Complete information sent free t obligation Write today — AMERICAN FLOOR SURFACING | | - MACHINE COMPANY } Ss == 5 523 S. St. Clair Street Toledo, Ohio ] i) Match Your Coat and Vest With New Trousers. FREE SAMPLE DON’T DISCARD YOU R o D SUIT. We coat ind vest another ys ) etting new tr to tech Tailored to y« A. easure Wit! p tterns to select from we can match almo pattern. Send vest or sampk of cloth t lay, will submit FREE best match obtainable. AMERICAN MATCH PANTS CO., Dept. C.0. 6 W. Randolph St., Chicago, !!!. Buy your metal roofing, shingles, Spanish tile, sidings, ete., DIRECT from the world’s largest ms vnufs weturer of sheet metal build- ing materials, at BIG SAVINGS Thousands of Satished users » own our own rolling mills. Enort , productior ts eee ‘ ikes pri nigger span You get the [any varieties. Edwards metal roofs last BUCHSTEIN’S 5 FIBRE i I MB better. Resist rust, fire and lightning =~ g, shingles, et f COPPER BEARING : ig, L . . 4 ¢ r neat ight ‘ " " ’ a ents at special pr cone steel stands the «é _— pa a r - Out! sts the buildit to which applied. dD. BUCHSTEIN 610 3rd Ave. 5 MINNEAPOLIS, MINN Ready Made Same and ages Low in cost. Easily erected. Permanent lo ‘All t aut diel Utes $0 eal 9 ir purse p se. Now’s the time for action. Write for Re ing aad Material Book No. 150 and for Garage Bool ~~ FREE— EDWARDS MFG. co. SAMPLES BOOKS 1200-1250 Butler St., ESTIMATES Cincinnati, Ohio tells time in dark smekeoner. tested and adjusted. Rush y er Quantity limited. Send no money, pa postman $3.85. SENOS 621 broadway, New York, Dept. 23-F-12

Page 303

fon A aph ectric nding Read. thout fleet. press winds tickly mk it. pring *trola dio ostly ED n the using make ts to ronth shed, plug nh our sands aving dle m- 0. rk City ———— Pay

go, tL IMB

POPULAR MECHANICS ADVERTISING SECTION 139 THE AMAZING NEW 5000 HOUR ELKON RECTIFIER FOR “BR cae -ELIMINATORS ‘me

i On i J 2 +, tT 32 P. R. Mallory & Co., Inc. Ros et? » 3 gt a

Head aod Eye must «ynchronize m testing the Elkon EBH Rectifier 350 Madison Ave., New York City L

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POSES Ge-Ovs SET, Vet Vom ee UE eee 140 POPULAR MECHANICS ADVERTISING SECTION

38 Below Zero is not too cold when you have a SUNSHINE Radiant Heater. Makes and burns its own gas. No piping or installation costs. Gives you clean, healthful, safe, SS modern gas heat. Floods the room

gler Made $168.00 in ave qi" with cheery warmth. Penetrates Two Days! every corner. Easy to carry any- ae 4 where while in operation. A beauty ee in design and appearance. a = Cheapest heat you ever had! Pays for itself first winter in fuel economy alone. Beats coal or wood heat. No. back-bre: aking splitting of wood or carrying of coal. No soot iwhes or odor Brit g cheery warmth to thousands of homes now! Guaranteed 15-DAY TRIAL To prove its astonishing value we'll send the st NSHINE anywhere on 15-day trial. STARTLING Use it in your Leos or store. Test it in 1 FRE Money -Saving Offer if ve £ *erov o vour own satisfactior . . ry way _ Pri € your « ~ itisfaction Get our world-beating offer on 1929 model ow convenient : ~ ics 8 ; 1oW convenient and economical It 1s. You'll be utterly astonished how low priced is the SUNSHINE PRODUCTS CO. 22zsc2,Ms forts nathan | made «Kansas City, Mo. Write today! pant Meda 5 eS CLEARED [EXPERT SOLDERING ONE DAY freien orcepceimencer. Se

is VO solder gz l 8 are e ill sub t esti- So writes W. H. nN of Ohio. Letter from Cali- cain Gen aan roblem eee fornia man reports $11275 sales in three months; that demands careful and expert workmanshi} New Jersey $4000 profits in two months; Pa. $3000 Write: profits in four months. Ira Shook $365 | | C. F. VERZIER, 278 Pearl St., New York, N. Y. & sales in one day. Bram bought one outfit A\\ » April 5 and 7 more by August. Iwata . > bought one outfit and 10 more within a year. J. R. Bert says “‘only thing I ever bought that equaled advertisement.” John Culp says:““Everything go- | ing lovely. Crispette | over

LIGHTING FIXTURES Ready to hang Direct from the manufacturer. Complete wired, including glassware. Send { new catalogue No. 29. Just Reduce Prices. Special Proposition to Deaile Erie Fixture Supply Company, Ine. ) Station A

good old world after . Soh $700 | ahead end of 2d week. | Wholesale or retail. 30 Days Free Trial —a— 3ig profits either way. New Modets now ready for delivery ¥ ‘ we ke meg to direct fre ae = Bot bar vil you get the tow pr ices Business is pleasant, | RIDER AGENTS WANTED Faipment st he usual prices, oney. te r facture a food Sen Suaresien rices and product. Mead terms on RANGER Bicycies. WE START YOU IN BUSINESS Furnish secret formulas, raw material and equipment. Little capi- tal required; no experience needed. Build a Business of Your Own a No limit to the sale of Crispettes. Everybody likes them. It's a GE em delicious food confection. Write for facts about a business that 2 will make youindependent. Start now, in your own town. PROFITS $1000 MONTH EASILY POSSIBLE Jf : only 2. Send postal for illustrated book of facts. It contains enthusias- accurate timekeeper -

tic letters from others—shows their places of business, tells how As 7 tanhed and adiestes F pews and when to start, and all information needed. Free. Write now! 9, x my LONG-EAKINS COMPANY 9 - radium dial — ge leather strap. Order this bar; ain 1228 High Street Springfield, Ohle today. Pay 06 delivery only a »etage eet U.S. rie 561 dredbaese New York, N. Y¥., Dept. wio

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Pan. ade in ys! hey | 3.80 ith cai POPULAR MECHANICS ADVERTISING SECTION 141 Home Ciaftsmans Wonder Shop AT if W SE down. ~ 4) > — a - —— = SS ON TRENT — TILTING OP TABLE SIZE In xn — _ ACE HIGH 385 SCALES 3 years of testing, experimenting and improvement 1s wrapped up in each new Red Jacket Home Work Shop. The finest tools and accessories that can be made go with each assembly order. Red Jacket equipment is designed, tested, approved and guaranteed by Wm. L. Aylward, a nationally known craftsman and manufacturer, who has developed his hobby into a co-operative association of thousands of craftsmen. Make It Yourself if j Portable — Interchangeable — Complete Pemaan Ce eel item RED JACKET Home Work Shop Finest Quality Hand 1 | The new Red Jacket Combination of Electric tools brings ne t uaranter you a Red Jacket Band Saw and in aduition the powerful vem ’ i ‘ Red Jacket Master Drill Motor with direct drive to the a stage j ness Ethics ay Waco Craftsman’s wood turning lathe (capacity 9"x36"), Ask 7000 Happy W. ileih@. uilasm. & also compound and 18” rests, a tilting top mitre saw with both depth and side gauges, scroll and jig saw, and all accessories for both portable and stationary power drilling, buffing, grinding and cleaning. Attaches to light socket and converts your work bench into a complete private tool and machine shop. It is a complete chest full of electrically driven tools designed for the private use of tool lovers and men who create, repair and appreciate handy tools at home. NOW! Make Things at Home Electrically Send coupon at once for information valuable to those interested in be: * tiful handiwork. Itis FREE. It tells you now easy it is to operate a Red Jacket set of tools and lists the advantages and Smee that are free to member craftsmen. Don’t miss knowing all about Waco, You are invited. Look out for imitations. There is only one Red Jacket » Waco—s willnot find WACO TOOLS sold by retailers. All sales made dire t v teed factory. SPECIAL CRAFTS COURSE FREE E ts ores SPECIAL CRAFTS COURSE and blueprint service 45° Tit c ; t i ot . Top Table at is free to Red Jacket Shop owners—all there is to kn: mn you it- , t = about handicraft methods, raw materials, woods, - ing, sawing, turning, designing, carpentering, decc at- ing, is taught by special correspondence. =m» BUY ON YOUR OWN TERMS Only $10.00 down. Liberal discount forcash, Easy monthly pay- ment plans. It is no hardship toowna Red Jacket. SEND THE COUPON--interesting Literature Free in i MAIL 1 Al. WACO TOOL WORKS, Inc., $216 W. Kinzie St., Chicago Manager, Dept.112. Please send me all free information and literature on Red Jacket Assemblies and FREE Services. The most elaborate and unusual drill motor ever designed for Ss dria ing power. I, dnelinns wind nied Gare & This Headstock furnished where mo esectricsly 45 avaisaost, MASTER DRILL| PAGCOR, coccccccsecss

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Rae Acents, 56 . _? ees. iFSVerw Wea ov F Agents, 561 Broadway, New York, N. Y¥., Dept. W10 112 POPULAR MECHANICS ADVERTISING SECTION

Vi

engineers tical ty Order today « The Makers of the famous C-O Garage ec Tools and Equip- 3-jaw chuck: 11x6* be nch ment, known the space; 23° high; weight 62 world over, offer you a pounds. 7 Utility-Drill complete ready for the job, for Bores holes up to ¥4*; works ONLY $34.00 in 9° circle; 2'4° up and 4 > . snindie r 7ice Not an attachment nor q own spindle run; 7 makeshift, but a real drilling T4uge on ——_, 1100 to machine designed by master <<V0 Spine lle speec Here's real drill value — read these specificati« pe motor, Also furnished in other volta rif you need more CANEDY-OTTO MFG. Dept. PM. ust ser ‘e plants, factories, all ns: Ver- mechanics and farm and 110 volt, 60 home craftsmen. cycle, single phase, AC with rd and switeb; belt drive Ide: il for garages, repair and

gesandcycles. Pricesonrequest information write for circular FULLY GUARANTEED

¢ Chicago Heights, Ill.

Diamonds HERE ( Every Quality) | We of Market rice Legitimate Offers of a % Century House - Jos. DeRoy & Sons See why this 1 less 3/16 ct. faultlessly cut blue-white dia- mond is just $118. Try to match at 60% more, this, or other startling cash offers. Examination free ‘of course. A % century institution, now of 10 large loan a

rated financially over a million dollars, operating the world’s largest diamond banking house. Leone a over $35,000,000.00 on Diamonds, Jewels, Watches, in sums of $5.00 to $5,000.00. All Details Free With Latest List Jos. DeRoy & Sons, 1975 DeRoy Bldg. Opposite Post Office, Pittsburgh, Pa. Yes, you can send me free, in plain envelope, detailed reasons, for startling diamond offers to individuals, dealers, wholesalers alike. Mail this coupon now!

a as Caen Name SE concusscctonnunsnccsnenescesnnesesesmnneannee Low as : $60 a Carat for Diamonds

DISTRIBUTORS Men and Women to sell K. P.—The Aluminum Cleanser without a com- petitor. Not sold instores. Priced right. Liberal commissions. Write now for details. If you mean busi- ness, this will interest you. KEYSTONE PRODUCTS COMPANY £00 Sarah Street Pittsburgh, Pa.

Sport Bodies for Fords AT FACTORY PRICES! This Model sc" $38.50 Prime $ e Other Bodies f Ra

AURORA Hi- COMPRESSION HEAD Speed up Your Model T Like Model A Ford Price $900 Send 10e for Booklet A-2showing complete line of Sport Bodies and Equipment. SPORT FACTORIES, AURORA,

ILL.

SALESMEN! $100 WEEKLY HOLDFAST SCREW SELL COX DRIVERS Als

Garages, Radix » Men, ete. Se rT; Holding, Self Releasi: and Proposition, 50e. S. J. COX, Dept. F, Franklin, Pa CAN YOU SELL GAS at 5c PERGAL.? If so write me quick. My Distr high as $3,000.00 per month. Let me SEND FOR FREE TRIAL Proof of astounding success and my $15.00 a Ae Bean to Distributors Frank See sembbee nate: thor Dept. 805-T. B., 154 E. Erie St., Chicago, | **Shame on you!** Are you nervous, embarrassed in com pany of the other sex? Stop being shy of strangers. ( the terrible fear of y« our superiors. Be cheertul and con fident of your futu sur faults easily overcome you can enjoy life to the fullest. Send 25c for for this amazing book. RicHARD BLACKSTONE, 8-4712 FLATIRON BLDG., NEW YORK

itors make as how you how

man whe These rail 983 W

»owns a Ji attractive the modern restaurant Business good e ear profit and over JE RRY oO’ MAHONY, Grand St. =e i A Good Profit—365 daysinthe year! Rain or sunshine. hard times or good, summer or winter, is all the same RRY O'MAHONY LUNCH CAR business-getting Dining Cars have all the convenier and cost far less. They can be shipped anyw!t very day of the year. Many owners are making $10,( t dows We bi 3 5 finance 1 tell x wtecest. JB atalog ther re r z Inc.—Dining Car Manufacturers Elizabeth, New Jers

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POPULAR MECHANICS ADVERTISING SECTION 143

IRLIIZAXILI LIA ALLL RAIA LRA ARATE cen ”) MY CERI VIN : 7) 47) .

PRENE A SPEEDWAY SEOE JUST IO PROVE YOU CAN MAKE ang 4 LIKE THIS! © =s —

” Yours for The Asking Everyone who fills in and mails the coupon will re- ceive free of all chage, il- lustrated plans and instruc- tions for making this beau- tiful Priscilla Sewing Cati- net Perhaps you read about it ina recent issue of Popular Mechamies, but I want to show you how to make it in one-fourth the time on my MOTORIZED work bench— the Speed Way Jig Saw Bench Saw shop! ‘tern Makers Built heavy and Discard Your Hand

Free Trial and Instructions Free Plans and Materials d We are anxious that every owner ofa “i SpeedWay Shop all get the maxi~ ‘4; mum pleasure and profit from . That's why we have establishes SpeedWay Per-onal Service ment 24 Blue vcr FREE

" is part of the Sad “soeret ¥ paseo Tools With each shop we in 24 Blue Prints of we a perfect line seconds. Rips, mitres, Furniture, Toys, et« hat anyone can make with blades included grooves, cross cuts Don’t let hand tools put a limit on the Speed Way Shop Mr. L. 1 Hull | in charge of your Craftsmanship. Let me show our Personal Service Dept., w answer your you how to start with this simple special questions ~ re is a real service depart- Priscilla Cabinet— zo on into grooving, ment at your beck and call mitreing, mortising, scroll work, wood Free Crafts Books

turning—make Humidors Fancy Gateleg Tables, ete. Why limit your Wher P 5 Rigg" : ; ingenuity when it is so easy to own a : 7 br “medetagl Anco, Sag WwW wt V = a J — a} SpeedWay Shop? Remember— Speed- Pa x spon Hee, Be ee go or od who Way is the Shop used by Manual > alain - . tion to be sent free with Training instructors every wher« a0} , Motorize Your Work- pega Action Needed! cannot ce ue Special Offers like this in- Bench Nnitely se the coupon today and we will You can be sure you're getting the the Pris illa ¢ abinet plans and Instructions right shop when you realize that at once SpeedWay alone has been serving the World's Industries with Portable ck! Electric Tools for the last twenty , years. I want you to examine the ex- WY = > lle they clusive features of a SpeedWay_Shop * Ree 4 MAIL TODAY? ast, we aregiv-

eee Te Trivial Down Payment SPinais Mama Pe Ce 4 lumber to makethe beau- We'll show you how to earn or save the small down pay- Dept. 2D, 1832 S. 52nd Ave. tiful magazine ments that come due just once a montl So simple, too, Cicero, U1, basket shown for any man who knows bis AB s about tools Ask Ge: at the left It what Mr. Watts of Miami, Fla id Send in the coupon c ‘ plete pleas is yours to keep today! ~ as en? ELECTRO MAGNETIC TOOZ CO. } . i Department 2D 1832 S. sand Avenue s aoe . CICERO (Adjoining Chicago) ILLINOIS : vesecee

or making are included, of course! Jrcvccecccescecesess tAte..ccccce

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POPULAR “There’s the new Ned Tyson” He’s making $6500 a year now “I usep to know grammar school together. him when he was a kid—we went to Then his father died and he had to go to work. Got a job with Brooks & Watson as a clerk, but could: head. “Then something seemed to wake him up. We all see that he was doing better work, “Then Old Man Brooks became interested —wanted to know how Ned happened to know so much about the Ned told him he'd been at home at nights through the International Correspondence Schools, ‘H'm,’ sai? Mr. Brooks, ‘I'll remember that.’ “He did too. Put Ned out on the road as for a year or so and then brought him into the as sales manager. rt scem to get a could business. studying a salesman main office “He's getting $6500 a year now and everybody calls him ‘the new Ned Tyson.’ I've never seen such a change in a man in my life.” An International Correspondence Schools course will help you just as it helped Ned Tyson. have the happy home—the you'd like to have. It will help you to bigger salary—the At least find out how. Mail the Coupon for Free Booklet INTERNATIONAL CORRESPONDENCE SCHOOLS “I he ersal Ll ity comforts Box 5584- F, $s route, Penna, Without cost or bligat r t copy of your book- let, “Who Wins and Why,” a ~ full parti ulars about the subject fore which I have marked X in the list below: BUSINESS TRAINING COURSES (] Business Management LJ Salesmanship Industria ment J Advertising igement Business Correspondence t vy Ca and Sig n Lettering P. A. Stenography and Typing I Civil 1 Servic e ta iy Mail Clerk Cor Ss | Subjeots Hi h Seh ol Subjects TECHNICAL AND tT) Electric Engineerir Architect Electric Lighting Architect "B luepri Mechanical Engineer ] Contractor B r Mechanic il Di ftsman Arc nT Dr iftsman } Mac! Shoy ‘ Cor te Builder Railroad I S tural Engineer Gas Engine O; verati ng }) Chemistry CJ ata } Civil Engines l = \uton » Work Surveying and Mapr rect ines Plumbing and Goalies Agricu wane CJ XN vication } Steam Engineering L} Mathematics Radi PIII scScthraneucnenodecesncesasqucanandadsei dacapialietnnecehedaendbatnnet ckahesnuemnsneeeoneieneniibis treet Address City State Occupation Persona residing in Canada should aend thia coupon to the Interna- nal Correspondence S ola Canadian, Limited, Montreal, Canada MECHANICS ADVERTISING SECTION -for radio work You'll find there is a Crescent- . Smith & Hemenway Plier for No. every phase of r: dio ind electri- 942 : \ cal w I Long, slim noses for si: 50 \\ hard-to-reach places, keen diag- onal cutters for skinning and ,\° cutting wire, and many other 5° for general work—all with char o— ] acteristic Crescent easy action, ] dependability them at and long life. See your hardware dealer’ CRESCENT TOOL COMPANY 210 Harrison Street Jamestown, N. Y. CRESCENT i TOOLS Catalog on rejuest 4 i] ‘Spinning Auto Light The Flying Ace SPINS WITH THE WIND Spinning NIGHTor nd Smith & Hemenway airplane windmill rai: auto light Beautiful color ec nati f ns The most beautifu in the world The Daddy of all Red, White & Blue White & Orange Red Gree Yellow for Taxis Special « $3.20 pt of $3. M sap inch. gammaten, tie ight te Complete...” *: ( wt A ' MOTORCYCLES Price $10 and up purchased through our Co-Operative | Pian for as low as $1.00 down and $1.00 per week Indians Harley-Davidsons Ace Henderson and Clevelands Send ten cents for Bulletin A reycles shipped te all parts ef the wer WALKER-INDIAN CO., 78 Brookline Ave., BOSTON New Aero Green Book for 1929 Contains 25 new circuits—Short wave tion needed by every amateur and for your copy Aero Products Corp., Dept. 498—4611 E. Ravenswood Ave., Chica: MOTOR CYCLES CHEAPER THAN BICYCLES $25 TO $5! k:asy terms ires $2.! 50: cits, $6; fr: imes, $3; for $. 7 $3; wheels, $4 chains, $2: saddles. > and broadcast—inf set builder. Send 3; tanks, engines, $15: handle bars, $5; engines for airplar $15; used tires, 29- - see $2.50; new, $4.50; truck tir 33x5, $6; 36x4% 30x34, $3; new bicycle tir $1.10; bo: it, airplar une oad ice sled propellers, Pre Lites, $4 00. Send 50c for ¢ atalog, PRICE CUTTER DENINGER Rochester, N. )

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POPULAR MECHANICS ADVERTISING SECTION

WS UZ, DIAMONDS SZgsn; WIN HEARTS > DIAMONDS aan CASH OR CREDIT Values Beyond Your Expectation in Worthwhile Christmas Gifts A genuine Diamond ring, pin or bracelet, awatch, wrist watch, pearl necklace, onyx or emblem ring, mesh bag, sil- verware etc., is su re t p'ease We have « il hae propriate for We me comparisons. Gaserncreen SUARANTERD oR UR MONEY BACK SEND FOR FREE CATALOG Big 132-page book il- lustrating our Dia- monds, Watches, Jewelry, Silver- ware and gift articles for all occasions,sent absolutely

No. 12 Beautiful blue white Diamond

. 8 B “‘Elite’’ solid 18-k a whit J roid. . $4.90 t with 3 Diamonds, $22.50; 5 Diamonds, txts 7 Diamonds, 50; 9 Diamonds, $2.50; 12 ar amonds, 67.50. Allplatinum, $25. With 3 Diamonds, $50; 5 Dia- monds, $70; 7 Diamonds, $80; 9 Diamonds, $100; circled by Diamonds, $200. 17 Jewel Elgin No. 14, Thin Model White gold filled,£20 year quality case; 12 ize; silver dial; assorted patterns, $23.50 $2 35 down and $2.35 a month. 7 makes of Railroad Watches, guaranteed to ~

OO

/ @

Blue white Diamond; ex- quisite solid 18-k white gold ring. $150

inspection. Credit at Cash Prices

CREDIT TERMS: Pov enotentt down; balance kly, semi - monthly, or monthly at your conve —my All goods delivered on first rh ment. On request we will send any article (NO MONEY DOWN) for your free examination. LOFTIS BROS. & CO, National Jewelers Dept. G-894, 108 N. State St., Chicago, ill. Stores in Leading Citvea— Established 1858

Wrist Watch No. 868 Solid 14-k white gold, 15 Jewels, Gold filled bracelet to match. $35. $3.50 down $3.50 a month.

12-inch scale model of Lindbergh's Spirit of St. Louis, Scientifically designed ana very realistic. jses from ground by own power and flies 30 ft. or more. Stays in air to 10 seconds

send for BIG FREE BOOK of Guarantwed Plumbing and Heating. Everything cut-to fit. 50 yrs. in business. Thousands of cus tomers. “You saved me $400 .00,"" says Mr Edw. Borkosky of N. J. Write today HARDIN-LAVIN CO.. 107-17 C Pershing Rd CHICAGO — NEW VEST POCKET ADDING MACHINE ben, —— D. Chillicothe. ¢ o. ADDS, SUBTRACTS, MULTIPLIES, DIVIDES A G E N I S P . ROFIT \BaBy CALCULATOR) Does work of $300 machine. Guaranteed 5 years GENUINE GOLD LEAF LETTERS | | WB 08 8b oF sna ioscstencninie. tu

ly t

it in 2 or Shours. No Construction set all parts end full directions, i in U.S., only 50c (no

Satisfactio mn or money end Mann & Ben-

lion dollar Ace —— nicl t\ tain pocket , oN : guaranteed to never tarnish. Anyone can put them co a6 0 8B} aye le " id Aes ope A. > -— —- —— on stores and office windows. [:normous demand, nished. Everybody should carry one for figuring world | te profits. Paul Clark says: Smallest day $28.70. ON L. Reel made $920 in two months. Write today FREE ftp ao

a free sample and liberal offer to general agents.

— —_-_—— 29 METALLIC LETTER CO., 433-B N. Clark St., CHICAGO TRIAL Total Cost ~ mmm SEND NO MONEY —Just name and address We will et ( i . On d pay $ 4 ' 1 he ft « : add i ’ f ie AGENTS—SALESMEN Gah ieragoe™ memes back. THOUSANDS OF This is west pr 4 wractica aleulator made Why . ss os P teed den G tations?” Order f thet - $50) ALL-IN-ONE patented Cigarette and Guarantee . i w Match Case. Holds a package of cigar- | j-—-=—=-=—=— Mail Coupon Today -—-—-<---- | ettes and box of safety matches. Beau- BABY CALCULATOR SALES CO., (MANUFAC TL RERS s tiful, grain finish Black or Brown Du | Dept. 41, P. O. Box 1118, CHICAGO, ILI t \ Pont Fabricord. Keen and convenient Cj Iam enclosing $2.50-—send adding machine pre ~pald A whirlwind seller for agents. Costs | C) Send po or Machine C. 0. 1D. $2.50 plus postage i $3.60 dozen, $36.00 gross. Write today | (10¢ ad nal in Leatherette Case ire for complete details | Name m( = ALL-IN-ONE SALES CO. Address Dept. A-12 4648 Grand Ave. City State Ne Sample, sec MINNEAPOLIS, MINN. AGENTS Write for big scion and territory propesitic mee

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146 POPULAR MECHANICS ADVERTISING SECTION aT - | ~ E chy aX ; oS ‘“Lava-clean”’ hands .. Men—you who love to tinker—here’s just the soap you need. Cleans quickly and choroughly the toughest-looking pair of hands that ever fussed around a work bench. Makes more lather in 15 seconds than ordinary soap in 60, and even hard or cold water won't discourage it. Millions use it. ‘‘Good old Lava,”’ they call it. Gets hands clean! Not just ‘“‘surface clean,"’ but clean 'way down deep. As easy on your hands as fur-lined gloves—because it’s made from the finest of vegetable oils. All grocers sell it. Full size cake of Lava Soap FREE! Mail this coupon Procter & Gamble (Dept. W-1228) Cincinnati, Ohio . Please send me, FREE, a full size cake of LAVA, the hand soap that removes a// the dirt and grease. NGM1Oe cccccccccccececesccccecerecccesences UO. 6 ab Ch dob ne me i020 0008 460s Kabob edanss New Book CTO PRICE. ay aVE 14 tol% New FREE book quotes 2 Reduced Factory Prices. : Lower terms—year to pay. 7 Choice of 5 colors in New @ Porcelain Enamel Ranges. New _Circulat- ing Heaters — $37.50 up. 200 stylesand sizes. Cash or easy terms. 24-hour - shipments. 30- day FREE trial. 360-day Furnaces +h 4% test. Satisfac- tion guaranteed. 27 yearsin business 700,000 customers. Write today for FREE book. KALAMAZOO STOVE CoO. 3Y1 Rochester Ave. Ranges *3775 Kalamazoo, Mich. “A Kalamazoo **’ Trade Mark Registered Direct to You” MYERS ELECTRIC; IRON CORD HOLDER A wonderful invention. Ker out of way while ironing. G ironing board. Tested and a; f by Good Housekeeping Institut: é AGENTS WANTED se, Do Sample 50 cents postpaid = Cc. A. MYERS CO. 6339 Woodlawn Ave., CHICAGO, LL..U SA DATENT NO 4416.060 AMPLE 5 a y, J ACLNTS WANTED 66 KE” players, the tegal Octofone is made for you. This new, uniquely shaped instrument has the deep mellow tone of the Spanish Guitar and can be tuned and played just the same as a “uke’’! Nothing new to learn—no les- sons. The same chords on a brand new instrument Can Be Tuned Like 8 \ Different Instruments By mere changes in tuning the Octofone can be tuned and played like 8 different instruments—the ‘uke,”” tenor guitar, tenor banjo, mandolin, mandola and other in- struments played with a pick. FREE booklet of instructions ac- companying each instrument tells you how to tune the OCTOFONE eight different ways \ / Your dealer will be glad to give / further information, or write us. Regal Musical Instrument Co. 3207 Grand Ave., CHICAGO Beautiful HOUSES 3900 and BUNGALOWS CAN BE BUILT FOR AND UP This and many others in my new book, Building Plans for Modern Homes, will save you hundreds of dollars. One of the mostcompleteand comprehensive books of plans ever published by any architect. New edition just offthe press. Nearly ¢ floor plans and photographs of Color houses, bungalows, etc., costing from t ena $200 up; gives sizes and cost to build. ARCHIT ECT Sent postoaid for $3.00. 101 Tremont St.. BOSTON. MAs* ne en sd | FREDERICK H. - Show Gibson tailoring and make $100.00 a week and more. Real style, finest made-to-measure tailoring, all- wool fabrics. Remarkable values at $23.50 and $31.50, Ssles come wonderfully easy and quick, even if you have no previous experience, Your custo S satisfa nis always — and oe cape ge ag le commissions paid in ad- come Gasecar yout We handle Solvation, collec. tions and give active co-operation in helping you build a big pay- ing business. High grade sam- ple outfit, with over 100 la wool samples, to business for yourself. W-go0 Throop sty oop St. Dept. z-516, Chicago

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No. 6132. Solid Gold Men’s Initial or Emblem Ring 2 Genuine Diamonds, 14-Kt. White Gold Top, Emblem (any lodge) or any initial (Old Fne- lish) Yellow or White Gold in- laid in Genuine Hope Ruby or Black Onyx. Mention if desired in solid white gold or green gold, same price. Terms (6 Mos. to Pay) POPULAR MECHANICS ADVERTISING SECTION A Ring You Will Be Proud To Wear Genuine Full Cut Diamonds [No Chips} SEND NO MONEY No. 6746. Genuine Double Head Cameo (raised hand-carved heads) ; 1-piece stone. Heavy Shank in White Solid Go'd or Green Gold Genuine -onyx, (nicely shaded Send pumber of ring, size of finger, initial or emblem desired, and ring will be sent for Inspection Stone Ask for Free Jewelry Catalog BUFFALO JEWELRY MFG. CO. “The Mail —a — ' $2 4 t. ( ty J ler’ “xact size o ene ee 501 Washington St., Buffalo, N.Y. Order House” , ring Ask for Keds by name They are not Keds unless the name Keds is on the shoe GIVE YOUR FILMS A CHANCE! They deserve it. Send for Sample. See what good prints look like. Ask for prices. FRANK SCOBME, 43-D, SLEEPY EYE, wan. | Theyre Shooting GENUINE AiR RIFLES Now- ys Everywhere Are Turning By The Thousands To The Gun of Guns —-The BENJAMIN Boys who hit the mark, the leaders and the leaders to be, in sports, in play, and the careers to come, sense the difference when they take hold of this real air gun. It’s the gun that shoots regular air rifle shot with utmost efficiency, accurately, safely (only a trigger pull will release it). No springs to break or weaken, lasts a life time, giving all the magic power of compressed air under perfect control. A pump stroke and you can shoot—additional power depends on strength of boy. Guaranteed for one year. Price, postpaid, $5.00, but see your dealer first and ask to see and feel and aim this gun. Right away, though, get your copy of “The Shooter’s Art”. Y” BENJAMIN A / Shoots Regular Alr Rifle Shot oA. AY! Using Compressed Air As eas Shooting Force ie : SEND THIS COUPON IN TODAY! Ok Send this coupon at once to learn all details of this amazing gun and to get your copy of “The Shooter’s Art’’. All your life you’ll be glad you read it—how to aim, hold and handle your gun. Learn to hit moving targets and be an all-around crack shot. It’s FREE—Send Now! FREE TO BOYS Address Benjamin Air Rifle and Mfg. Co. 609 N. Broadway, St. Louis, Mo. Gentlemen: Please send me FREE, without obligation, a copy of “‘The Shooter's Art.”’ Town Stat Dealer’s Name Town ........... DBDDDDDHDDHHHHHDHHHHHddS®@

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148 POPULAR MECHANICS ADVERTISING SECTION The Fairchild Boy $5 She’s a Wonderful Bus! Fly this genuine Clinton ‘‘seale model”’ plane and grab all the prizes! It has 22-inch, high-lift wing, all-metal motor mount and propeller, rubber- tired aluminum wheels. Will fly over 200 feet, dip, zoom, roll like a real plane. The Fairchild model shown above, the Fokker or the Spirit of St Louis sent postpaid anywhere in UNIOR Ce}: re Gy mnasium Play A compact, malleable iron hom the U. S. for $5. Your Way gymnasium consisting of a Roy ARMY SCOUT To ing Machine, Punching Bag Army Scout Plan Chest Weights, Parallel B shown at left, or the Strength Chinning Bar, Wrist Ma: Navy Scout, $3.50 All planes ~ ae ady | Wall Ladder, Massage Roller, ete. Fits te y, ane uar- } a7 a : anteed to do it! | any spare space, 7144x9 feet. Dural Order now. | ‘ = attractively finished and easily erected Catalog and free glider 10c Hundreds sold to indoor workers and ¢ who want to enjoy daily gymnastics and to |} THE CLINTON TOY CORP., Dept. p12 physically fit. An adult’s equipment, priced r North Haven, Conn. ably and sold on easy terms. Write for Booklet. DEALERS AND JOBBERS, WRITE GYM JUNIOR CO. ae rt re Without any knowledge of Music or Notes you play in a fe | utes, perfect like an Artist, latest hits, songs and danc« | study or practice Nobolyv can see the@frangement models. $40.00, $55.00, $70.00. Every instrument guar: ve ny mode Is of gen line MOVIE MACHINES, some Interesting circular No. 1 and Roll List mailed free a as low as $3.75, all using standard size big theatre films. | TREASURE SALES COMPANY, 1690 Boston Road, New York Our stock of films is the most complete and lowestin | 21 price— with an exchange service. Films of leading stars Ts, ind rel jus subjects are available. DON’T DELAY " i) e/ WRITE FOR FREE INTERESTING CATALOGUE fi 7 _£. - New Free Catalog! NOW! P > MOUNT MFG. CO. || ‘yes EPC® Send _today for our PARAMOUNT MEF & t cenariiadiaa® Meseaies ; ing bargains in Plumb- ing, Heating,Hardware, 4’ Millwork, Roofing,Paint so” \\ Dept. 1371-L BOSTON, MASS. IS and Electrical Supplies. Absolutely Free! STANLEY PLUMBING SUPPLY CO., inc. 400 N. 12th St. Phila., Pa. SANTA CLAUS Finds it easy to get a pair of NORTHLAND SKIS down the chimney. Ask dad to tell him vou want the kind of skis the experts use. Genuine Northlands bear the deerhead trademark. Free book- let on ‘“‘How to Ski.” $2.50 Commission in Advance! Workma ‘it, Guaranteed! re ~Work or Dress! Looks, Feels I Weare Like Iron FRE "E Kit! FITZ-U-TAILORING CO., 172, South Whitley. Ind. | WANT a new bu “8 profession of your with all the trade y« attend to? Then becom | a foot correctionist in a few weeks earn big income in service fees,—not m¢ nor chiropody—easy terms for home training, no further « “00 a a Co. needed, no goods to buy, no agency. Addre 38 erriam Par t. Pau inn. Stephenson Laboratory, 1 Back Bay, Boston, Mass

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POPULAR MECHANICS ADVERTISING SECTION 149 ILVER STEEL AWS mm! ATKINS Na.400 HAND SAW SHIP POINT r— No.!0 HACK SAW * t saw made Silver Steel, Nickeled steel adjustable frame Point blade. Perfection handle Non-Breakable or Silver Steel Home Workshop blades LL ft Men who have home workshops get ATKINS rcs great pleasure and profit in making No.0 things, with ATKINS Saws and Tools. toa-PN-) 4 - | ly, high-grade saw for boys or They save tirne, work and material in “Miia Mak? Btehes te best 20 in. polished blade cutting wood and metal—do the work Scraper you ever used. All sizes far quicker, easier and better. Saw Books FREE Only in ATKINS Saws do you get ” Get these two helpful book- y y g “SILVER STEEL,” that takes a /ets— “Saws in the . ’ 4 . ome an é hom i Silver Steel blade. Apple sharper cutting edge and holds it ion.” Both 7 7SO Row- indle. 8 to 18 in. length longer. Only an ATKINS Saw is sent FREE— E. C. ATKINS Ba, “Segment Ground” to make sawing —_ mail us & CO., Est. 1857 ag, a . ° ec Ss. i i . _— easier and prevent binding. And only jejow ?°" ¢ Roe sine mag Bars, ATKINS Saws have Perfection Han- o Please send me chine, dles to eliminate all wrist strain. ; “Saws in the Home” itsi stable handle with compass, See ATKINS Saws and Tools for home and "Gow Sense, "* Sse. ole and metal-cutting blades workshops, at your hardware store. y rable PN en asessésseeceebauen : E.C. ATKINS & CO. ___ Est. 1857 ,¢ 1 426 S. Illinois St., INDIANAPOLIS, IND. ; OUNeTS Leading Manufacturers of Highest Grade Saws for Every Use; Saw ; Address.. oO keer Tools, Saw Specialties, Plastering Trowels, Machine Knives, Grind- renst ing Wheels and Files. roklet, AVENU Make $25 to $50 per day _N. i. $25 To $50 and be Your Own Boss! Per Day Drilling Wells! 7 Cash in on demand for good wells in every com- t tv! Any man with mechanical turn of mind easily operate one of our drills, make big 9 money, be independent, work the year ‘round! A , few hundred dollars starts you in this big pay- 4 ry business-—pay balance out of earn- j 3! Write for FREE CATALOG de- few bing ARMSTRONG ALL STEEL ‘ ces. WELL DRILLS—gasoline traction or i raction models. rant Write now—today—Armstrong Mfg. Co., 810 Chestnut St., Waterloo, Iowa. N Wwe Li h W ig ew York e & t © a A sturdy, practical electric drill, GLUE ‘ con — agg for making 7 dif- 43 fully guaranteed for one year. Spe- eren projects Page's raf LAGUC, 6 Gloucester, Mase $ og cially designed for light and inter- 9 HOW TO MAKE YOUR OWN [E PAGE $s ATTRACTIVE FURNITURE Send 10 cents for LePage’s New Third Home Work Shop Book, containing Le \ 17 Ennex Ave —S mittentwork.Weighsonly4pounds WN \ Built to use in even the tightest \ WOODWORKERS corners. Many of the large indus- “at Weighs _ trial plants are buying this drill by ee ] Only 4 the dozen. — A TTENTION is Uses direct oralternatingcurrent, —_—_ " Pounds and is supplied to you for 110 to 125 cara Chis bandsaw-lathe am volts, 200 to 250 volts or 32 volts. combination fits in Fitted with a special Jacobs Chuck. TS! exactly ith 1 4 Universal Bore upto '4". Stop and start switch . actly with W rat Motor in the handle. Comes complete with nar ou are doing. 10 feet of cord and socket. Price post- Lik Bandsaw ean be _ paid anywhereintheU.S.A.—$18.75. 0., Des . ised to rip and Write for Send check or money order. If not —_— cross cut 7 satisfied return in5 daysand money usines ross Cut. 3-speed our catalog will be gladly refunded. In ordering, r lathe insures first showing be sure to specify voltage used. ; . y‘ iss turning. complete line. ect me - WRITE Jones Motrola Sales Co. ne« KORNAU MACHINE COMPANY “gc ~*~ “oem Station A CINCINNATI, OHIO ca Mass.

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150 POPULAR MECHANICS ADVERTISING SECTION © go00INUsc: SAW A SHOPFUL OF TOOLS WITHIN ARMS |} REACH! __ SAW TABLE RAISED a” SHOWINC EMERY WHEEL , SAW | GUARD AND #)__("9pn™ N THE DRILL AT ~ iy ’ 2>- short space of TACHMENT ~~ } | four years, the Devitt 8- Inch Combination Saw has become F.0.B. PHILA a practical necessity in thousands of shops, factories and households eve rywhere. Many imitators hav: PLANER AT- spruitg up, but Devitt leads them all. Think of the convenienc: TACHMENT and economy of this handy little machine that will rip, cross cut Con SAW TABLE bevel, miter, groove, mortise, tenon, drill, rab bet, grind, buff : und ~ polish. Attachments are easily and quicky adjusted. The saw and motor, when set up for work, occupy very little room. Saw is equipped with 14 H.P. 60 cycle, 1750 R. P. M. 110-volt A. C Motor which can be attached to ordinary light socket, and pr: vide power for other purposes when wanted. A cut up to 2!4 = 7/4 SHOWINC SANDING . pisc . , can be made without planing. Comes complete with following ATTACHED cay t= attachments—12”x16” table, 8” Combination Saw, iron pulley f — saw table, 10” ripping fence, adjustable cut off miter gauge, motor } TABLE _ en 4 — 1102 SOUTH 2mpn ST. PHILA.PA. Start'a Welding & Battery Shop Lead Burning Outfits... Welding Outtits.... Soldering Outtits

+] Spee ede up all meneuring T nterlo a Gecaeectedeen oe aan measurements, ae weil MASTER SLIDE RULE ae ¢ steide Any length, 2 te Lead Burning ‘Torches 64 8 ft., 20c lineal ft. If not at dealers, sent postpaid Welding Torches.... 10 Cutting Torches... 40 j Regulators and Gauges 9 Paint Sprayers.. 14

We iding Supplie 8 Boe Sw Acetylene Machine ( P. O. Box 2 Hamilton, (0 MASTER RULE MFG. CO., 813 E. 136th Street, NEW YORK j Dealers and Agents Write for attractive preposition

You can get yourself no Better Christmas Gift than A Gerstner Tool Chest

Now you can convert that old Ford give gael’ 5., car into a useful farm tractor without

Ideal for Toolmakers and Machinists altering any Ford parts. We furnish i Write for free catalog the traction wheels, drive gears and } aon auxiliary axle and mountings, ready | C TS. l, mh a to clamp on tothe Ford frame. Pulls LOPE” OMS. 16° plow. = Write for Free Parttculars 460 Columbia St., DAYTON, OHIO Shaw Mfg. Co., Dept. 4512, Galesburg, Kan.

WA D E AMATEUR MECHANICS, REPAIR SHOPS, INVENTORS, STUDENTS real machine tool for the home work bench—capacity 4* dia. x 12° length For Metat—Wood C« , Flere mal Turning— Facing — Boring — Drillin Winding—Thread Cutting. Aecurate Strong ‘ - Aa, Slide-rest has travel entire length of bed Lesdecre w inside bed. No. 1 Lathe, plain here jock, $28.00. Wo. 2 Lathe, back-geared headstock, $58.00. Extra for iathes with 1@ inches °e LATHE aan centers, $7.00. Complete line of accessories at equally 4m prices. Write for free catalog THE GEROLD Co. Dept. P-49 120 Liberty St. New York

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POPULAR MECHANICS ADVERTISING SECTION

KNIVES STEEL

Specify Simonds for Economy eq CUT EASIER WEAR LONGER In industrial plants, where eve cost factor is vigilantly whtched. Simonds files are always found at work. They save valuable hours of working time because their ac- curately cut teeth do their work faster. They saveworthwhile dol- lars of tool expense because their tough teeth last longer in hard use. Send for copy of booklet, “File Facts,” FREE. SIMONDS SAW AND STEEL COMPANY Fitchburg, Mass. SERVICE SHOPS Established 1832 IN PRINCIPAL CITIES

her openings, y. back if 10 days’ trial doean't satisfy $3.65, prepaid, cash with order; $3.90, ( D. Handle only, $1.75 cash, $1.90 ©.0.D. Agts. Wntd. Too! Service Sales Co., Box 4605, Sellwood Sta., Portignd, Oregon MUuastration , clearly shows ia flexibility of . Rorenting filustrated circular free. Write ocay. > Agents wanted. ARKOGRAF PEN CO.. 1171 E. Stark St., Portland, Oregon

For the Handy Man! TORIT TORCH No. 23 Uses acetylene only from a Presto autotank. Finest thing you ever saw for Radiator and Battery Re- pine. Soldering, Light Brazing, eating, etc. Complete with 4 tips, soldering copper, hose, connections.

TP 24 MEUM Frame $°750 Gime 20.708 naoaron eaarreny woan TP 26 LARCE FLAME —_— . 00 99.90n.00 ADAPTER -& Exce . HEATING . USE witrt ept tank) SOLDERING COPPER Seeesne oases 173 2042 ST.PAUL WELDING & MFG. CO., 177 w. 3rd, St. Pau, Minn., v.s.A.

In the Far Corners of the

Ss NOWN throughout the world for their phenomenal strenet and amazing per 7 formance, CO! WELL tools are prized t mechanics everywhere y accomplish re- markable results under the most adverse condi tions and do work that no other tools will do They are made by our special CORN WELL proc- esses, which insure their unvarying quality. There Is No Substitute for Cornwell Quality Mechanics are amazed at the startling tests which demonstrate the superior quality of CORNWELL tools Your n back if any tools fail to do what we « m We Stand the Ris

¥ ‘ aad cae _ = b i ; Published in English and Spanish The Cornwell Quality Tools Co., Formerly at Cuyahoga Falls, Ohio) Send me new illustrated catalog with prices on full line CORNWELL CATALOG -FREE Dept. E, Mogadore, Ohio. WELL Handmade Tools of CORN Where Employed Name Address City Stat

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152 POPULAR MECHANICS ADVERTISING SECTION Fastest NOW— GET MY GREATEST Used by The United States Government it's easier, now, than ever before to own this fastest cutting, easiest-moved, most powerful Log Saw ow you can make wig pore sawing firewood, stave- bolts ice, shingle timber, ete RITE TODAY FOR FULL DETAILS try 30 QTTAWA mse i Mey . wood business. Don't let the 350 Cuts a Minute ! — Re a — ready money stop yor Puts the OTTAWA Working For You! ONE WHOLE MONTH to_ wee the member, we sell on very easy terme Now you have a log ( AWA t ) « . yer , » P ° eld pn on rok yp tAntonny —s Every caw To Save You Freight —— and eet your ma- in & few second que to you & few da nye 8 you order, it’s all sawed up 3 ship from fac ' vor to you of without an Backed by 10-Year Guarantee =i,’ BRANC ot ot : Y F R EE E Send ine your name one a on a posteard today for my wonderful new edition of the ood Sawing E: ope Be sure to investigate—it will help you to make big money HA RRY OVERM: A N, Pres., OTTAWA MFG. COMPANY 1745-L Wood St., Ottawa, Kans. 1745-L Magee Bidg., Pittsburgh, Penna. ScrroerenS sc ROLL SAW ton Home or Smal Shop The saw a Working Model Ship Coaler ; T’S no ordinary toy. It really ‘“‘grabs’’ coal, pebbles or whatever you wish, carries them to the chute and dumps them in your ship or truck, all at a high rate of speed! For More information Write for Our Scroll Saw and Tool Catalog ='Y * You just sit at the controls and make it run! You can SCHROETER BROS. HARDWARE CO. pe patna w build it yourself with your own hands. ex Washington Ave.. ST. LOUIS, MO. machine Or, if you prefer, you can make a real scale model auto- ad Assem| mobile just like a big one from gear shift to differential! Plymo th Or a tri-motored airplane that works. CEDAR CHEST We send you an easily understood instruction booklet for eusnelt any one of these models, free! Booklet usually costs 10c. Ralf — ides Send 20c if you want all three. Just send us your name - - a and address and that of three of your friends. Mention cut- wit which booklet you wish. A wonderful chance. Act now! meeseeee. Oe Complete Order 1 8.49 RediKut so you n ~~! n MECCANO COMPANY, INC. a ee DIV. H-2 ELIZABETH, N. J. = =_Semawers tone I Offer You THIS OFFER WORTHIO: | $42 a DAY ~and a et Write quick for new proposition. We ‘ ® é At offer $8.00 a day and a new Chevrolet oO our Coach, for demonstrating and taking o> Cards, stationery, circulars, tag, labels, paper. Complete aca p+ Relastites, Tecan t — 7 Outfits, $8. 85 up, Job Presses $11 up, ‘Rots ary $149. Card No E rience reauired. S le fi Ws i? Cutters, $3. Save money. Print for others, big profits. wed _— aes ate —— FOG. HRMS GSES Alleasy rules sent. Write fore stalog bre sses, type, paper, —— pad HD cards, ink ete. THE KELSEY CO., T-37, Meriden,conn. | COMER MFG. CO., Dept. W-5137, Dayton, 0. NOW! You Can Do Your Own NICKEL-PLATING | For Plating Nickel Brass” Miake $150 to $500 a Week | Wr, Gold ee, New Scientific Invention Enables Anyon: See = a To Nickel-Plate Anywhere with Aladdin Portable Outfi 4 the This marvelous Invention enables anyone to NICKEL-PLAT! | — anything—anywhere; in the Home, Garage, Office, Store or Sh: tow —in fact, you can do all the NICKEL-PLATING on any aut: mobile with the ALADDIN ELECTRO PORTABLE OU TE I “lniroduclory {in a very short time—without removing any of the parts. Tl Offer terests every auto nected nite because you can SEE THE NICKEL FLOW NOW take ¢ Plater to the job instead of taking the job to the Plater. This off: | wonderful ECONOMY to users and BIG MONEY-MAKIN possibilities to AGENTS. Positively guaranteed to do 8 we clai WRITE FOR FREE BOOKLET | AGENTS. : P. J. F. BATENBURG Dept. 44 RACINE, WISCONSIN |_WANTED EVERVWHER

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ble this neuth DAR EST

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' Palmolive Shaving Cream POPULAR MECHANICS ADVERTISING SECTION 153 Among those presents RIGHT up in the front rank of things to give for Christ- mas put Eveready Flash- lights. Not only because that’s one of the easiest and most successful ways out of the Christmas-gift dilemma, but because it’s the sensible thing to do. Everybody, from six to sixty, wants a genuine Ever- eady. Not just “a flashlight,” but a genuine Eveready. Yes, it’s important to insist on this point. Genuine Ever- eadys have ALL the newest and best features. There are models and types for every possible purpose. This year, brighten the lives of all to whom you give. Start them right with the flashlight habit, that national movement to save skinned chins, banged heads and ripped clothes. Give them the world’s best portable light-maker—a genuine Ever- eady Flashlight. Best in the world. 10-year uarantee, lowest prices. REE instruction, ask for FREE catalog RUATTA, SERENELLI&CO., 1014 Blue Island Ave. Dept MChicago. lil. |]

“5 New Delights for Men”

JER: aD ne p2Y° PRICE ONLY Underwood, Remington Royal. etc. ¢ All late models comotetel refinished 14 brand new. GUARANTEED for tea A years Send nomoney—biz free catalog AY shows actoalmachinesin fullcolors Get D our direct-to-you easy payment plan and 10 days’ trialoffer. nte national Typewriter Ex, 1866. LakeSt., Dept. 1294, Chicago, til.

DEAFNESS IS MISERY Multitudes of persons with defective hearing and Head Noises enjoy conversation, go to Thea- treand Church becausethey useLeonard Invisible Antiseptic Ear Drums. Tiny Megaphones fitting in the Ear entirely out of sight. No wires, batteriesor head piece. They are Unseen Com- forts and inexpensive. Write for booklet and swornstatement of the inventor who was himself deaf. A. 0. LEONARD, Inc., Suite 699, 70 Sth Ave., New York

WuRUTIIZER THE WORLD'S © LARGEST MUSIC HOUSE / in the little Saxo: 200 Years Ago tin it Shoenesk lived Hans Adam Wurlitzer, Master Violin Maker. His shop was a gathering place for musicians of the time, for he was a teman. When he died his shop passed into the hands of his eldest son, and for seven =, down to the present lay, the descendants of Hans mm Wurlitzer have carried on his work.

Today in every Wurlitzer instrument you will find a quality, a character, that could pot come from mere excel- lence of manufacture. It is the heritage of these seven generations of music craf

any Warlitzer Instrument in your Own Home OU may now have an‘ Wurlitzer instrument for a generous tree trial in your own home. Examine the instru- ment, show it to your friends play it as much as you wish. No obligation to buy—no expense for the trial We make this liberal offer because we want you to try for yourself thes« wonderful instruments, the re- sult of 200 years’ experience in musical instrument Building Easy payments are arranged t uit ‘ r convenience. Tt \ Ir omy to trv a n Wut rument in your n home Send for New Catalog | € greatest mu lcoat gever pul hed ( er $000 artic every wn instrument described and illu ted: manv of tt < rs Cyive ou lowest prices and al { Free t I y | ment ent FREI 10 Obligation Send this Coupon em shown in tu

sees SSCS SCP eeeeeeeeeee THE RUDOLPH WURLITZER CO., Dept. 1779 117 E. 4th St., Cincinnati Swe che y free, your new illustrated catalog. with prices and descr Ad . ity Instrument... ‘ hich y * SSeS eee eee ee eeeeee

Copyrieht, 1928, The Rudolph Wurlitzer C«

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154 POPULAR MECHANICS ADVERTISING SECTION M Take the First Step Today If you have a useful, practical, novel idea for any new article or for an y improvement on an old one, you should communicate with a competent Registered Patent Attorney AT ONCE. Every year thousands of appli- cations for patents are filed in the U.S. Patent Office. Frequently two or more applications are made for the same or substantially the same idea (even though the inventors may live in different sections of the country and be entirely unknown to one another). In such a case, the burden of proof rests upon the last application filed. Delays of even a few days in filing the application sometimes mean the loss of a patent. So lose no time. Get in touch with me at once by mailing the coupon on the opposite page. Prompt, Careful, Efficient Service This large, experienced organization devotes its entire time and attention to patent and trade mark cases. Our offices are directly across the street from the U.S. Patent Office. We understand the technicalities of patent law. We know the rules and requirements of the Patent Office. We can proceed in the quickest, safest and best ways in preparing an application for a patent covering your idea. Our success has been built on the strength of careful, efficient, satisfactory service to inventors and trademark owners located in every state in the Union. NO CHARGE for Information On How to Proceed The booklet shown here contains valuable information relating to patent procedure that every inventor should have. And with it I will also send you my “ Record of Invention” form on which you can sketch your idea and establish its date before a witness. Such evidence may later prove valuable to you. Simply mail the coupon and I will send you the booklet, and the ‘‘ Record of Invention”’ form, together with detailed information on how to proceed and the costs involved. Do this NOW. No need to lose a minute’s time. The coupon will bring you complete information entirely without charge or obligation. Ah A NNSA ALOR IESE

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| Copy wht 2. The RB ph Wur zer ¢ POPULAR MECHANICS ADVERTISING SECTION 155 My Patent Law Offices Ji Across St t From 1).S. Pat. Office Above is a view of my draft- ing and specification offices where a large staff of ex- perienced experts are in my constant employ. All drawings and specifications are prepared under my personal supervision, held in strictest confidence in strong, steel, proof files, which are accessible only to thorized members of my staff. Feel free to me fully and frankly. Your case will my personal attention. It is probable 1 can help you. Highest references. I RST—clip the coupon and get my free Do THAT right now. Strict Secrecy Preserved ommunications, sketches, drawings, etc., OO ™ ££ - ye nenrn Clarence A. O’Brien Tar CORD OF INVENTION | Registered Patent Attorney ber of Bar of Supreme Court of the States; Court of Appeals, District of Columbia; Supreme Court, District o ( mbia; United States Court of Claims Practice confined exclusively to Patents, Trade marks and Copyrights » Clip this Coupon ad Mail it Jom! CLARENCE A. O’BRIEN, Registered Patent Attorney 70-H Security Savings and Commercial Bank Bld¢., Washington, D. C. Please send me your free book, “‘ How to Obtain a Patent,”’ and your “ Record of Invention” form without any cost or obligation on my part. RS ON ey ere nee pere ieee emer ry een (Important: Write or Print name cle arly.) Address. . A in eiwss Fa eet ot ote wba

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156 POPULAR MECHANICS ADVERTISING SECTION PATENTS wars

Have You An Idea? FOR THE PROTECTION Our Offer: OF YOUR INVENTION YOUR FIRST STEP The inventor should write for our blank form “RECORD of INVENTION’? This should be signed and witnessed and returned to us together with model or sketch and description of the invention for INSPECTION AND ADVICE No Charge for the Above Information Our Five Books Mailed Free to Inventors Our Illustrated Guide BOOK How to Obtaina Patent Contains full instructions regarding U. S. Patents Our Methods, Terms, and 100 Mechanical Move ments illustrated and described. Our Trade Mark Book

2.4 =)

zh

me TT wd Shows value and necessity of Trade Mark Prote an mm fh tion. Information regarding Trade Marks and uw yom Ee tatr competition tn trade. iho pg . % <a ue Our Foreign Book ap - = We have Direct Agencies in ForeignCountries,and sé 2 ie cure Foreign Patents in shortest time and lowest cost. ? t*e fe 7 - thes n" Progress of Invention Description of World’s Most Pressing Prob- lems by Leading Scientists and Inventors.

Our Philadelphia Office Sule 518-519 Liberty Bidg.

a / We Regard a Satisfied Client as our best advertise- vi ment, and furnish anyone, upon request, lists of clients | | in any state for whom we have secured patents. | { | Highest References—Prompt Service | ’ a, ‘ = —Reasonable Terms j a - a t é aS ae =. Mise cbess | | e A litle @ fe eg) ) ypatee® PATENT ATTORNEYS

WT ‘ ; ils i Main Offices: 789 9th St., N. W., Washington, D. C. Our Washington Office, Victor Bldg. Opposite U. S. Patent Office

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| ON ON Pe] nd or or on it its. ve PC re st. b- rs. eC- its POPULAR MECHANICS ADVERTISING SECTION 157 ELAYS ARE DANGEROUS INPATENT MATTERS IMPORTANT! To Avoid Delay! YOU SHOULD HAVE YOUR CASE MADE SPECIAL IN OUR OFFICE to save correspondence, secure protection and early filing date in the Patent Office. To secure special prep- aration of your case send $25.00 on account with model or sketch and description of invention. Our Chicago Office Suite 1110 Tacoma Building Our Pittsburgh Office Suite 514 Empire Building MAIN OFFICE, VICTOR J. EVANS & CO.—VICTOR BUILDING, WASHINGTON, D. Cc. Our Lawyers Practice in all U. S. Courts and defend Clients in Suits involving Patents, Trademarks and Copyrights All Communication: and | CUS ORGANIZATION OFFERS (ERrec el Data Strictly Confidential. | PERSONAL SERVICE gEalals Interference and Infringe- | By Experienced Patent Lawyers, @@ io 5 ET” ment Suits Prosecuted Solicitors and Draftsmen [FREF) VICTOR J. EVANS & CO.| | COUPON PATENT ATTORNEYS NEW YORK OFFICES CHICAGO OFFICES | 1007 Woolworth Bidg. 1110 Tacoma Bide | PHILADELPHIA OFFICES PITTSBURGH OFFICES SAN FRANCISCO OFFICES | mimi ee C0 Se. BAR wl 518-519 Liberty Bldg 514 Emptre Bidg. 1010 Hobart Bidg. MAIN OFFICES: 789-9th Street, N. W., WASHINGTON, D. C. Gentlemen: Please send me Free of Charge your books as described on preceding page | Name_.. | | Address ee ee ee Pen ee ee ge gee . Our San Pranéioce Gilco _—_———_—— | sm Suite 1010 Hobart Building j

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158 POPULAR MECHANICS ADVERTISING SECTION cee | = | r ‘ ‘ ~~ ,’ TRADE-MARKS + DESIGNS T ) { G FOREIGN PATENTS | | DB) T be T “* PATENT ATTORNEYS Associated since 1846 with the Scientific American ScrentTiFiIC AMERICAN BUILDING ScrieNTIFIC AMERICAN BUILDING 24 W. 40th St., New York City Washington, D. C. Tower BuILpDING Van Nuys BurLpinG Hosart BurtpinG | Chicago, I'l. Los Angeles, Cal San Francisco, Cal Books and Information on Patents and Trade-Marks by Request. Associates in All Foreign Countries —_—= é | Send us sketch or model for advice and exact cost of patent. Our book “Hew to Obtain a Patent’’ a | sent free. It tells how to apply for Patents, ‘11 Here is N’ most EN ible book ever offered to inventors — arks, Foreign Patents. Copyrights, ete.; gives in{ ; ae . ss ition on Patent Procedure: tells what every inver ! One thousand needed inventions listed and described. Arranged | should know. Thousands of Inventors, who are out as follows: General Problems; Automotive; Mechanical; Elec- | clients, are our reference. 4 / trical; Chemical; Radio; Marine. Separate chapter on the Ten | > ‘ Most Needed Inventions. This book may give you one idea | SAAS O CUAMELEE, 2s Washington, 0c. | that will win you a fortune. Nothing else like it has ever been | published. Compiled at enormous expense. Edited by Raymond Francis Yates, formerly Managing Editor of a leading scientific PA I E N I S magazine. Over 100 pages, durably bound. Price $1.25. T rade Marks, Copyrights, Patent L a reg ey te W SEND NO MONEY illustrations, 100 mechanical movements. Sent 21 on CH i Cut out this advertisement and send it to us with your name and address, plainly written, and your song of this remarkable book will A LB E R T E. D I ET ER be sent immediately. Pay the postman only $1.25, plus postage, on | formerly member Examining C > all U. S. RE — ne er — back, after 10 days’ examination, if desired. Lim- REGISTERE ited edition. Write NOW. (Outside U.S., 81. cash with order.) ' ne “” | | PATENT LAWYER and i SOLICITOR BUREAU OF INVENTIVE SCIENCE 621-A, Ouray Bldg Dept. 312 Rochester, New York | 30 Years’ Experience Wasiiueten, D. C. Booklet Free Highest References Promptness Assured _ Best Results —_ drawing or model for preliminary xamination of Patent Office records. ALL BUSINESS GIVEN PROMPT AND PROPER ATTENTION Listed Patent Lawyer in the latest editions of the Rand-McNally Directory of Bankers and Bonded Attorneys, published by Rand-McNally & Co., Chicago, Ili.; The Baggott & Ryall Directory of Guaranteed Attorneys, published by the Ryall Legal Directory Company, New York City; Flugel’s List, published by the Legal Directory Publishing Co. of St. Louis, Mo.; the American Lawyers Annual, published in Cleveland, Ohio; Eyre’s Law List, Bush Terminal Building, New York City. WATSO Rp E. © @) L EM A N Victor Building, 724 Ninth Street, N. W. REGISTERED PATENT LAWYER WASHINGTON, D. C.

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POPULAR MECHANICS ADVERTISING SECTION To the Man with an Idea l offer a comprehensive, experienced, efficient service for his ion prompt, legal protection and the development of his proposit Se nd sketch, or model and description, for adv ce as to cost. Preliminary advice gladly furnished without charge. Booklet of valuable information and form for properly disclosing your idea free on request. Write Today. IRVING L. McCATHRAN, Patent Lawyer Formerly with and successor to Richard B. Qwen 55 Owen Building 41-B Park Row WASHINGTON, D. Cc. NEW YORK CITY TRADE ~MARKS REGISTERED

INVENTORS ,2R0TEC.

Send for our Guide Book, HOW TO GET A PATENT Invention Blank, sent Free on request. or sketch and description of your invention for INSTRUCTIONS. No charge for the above information. RANDOLPH & CO. 301 Victor Bldg., WASHINGTON, D.C. STREET PTTIPi iii » and Evidence Tells our terms, methods, etc. Send model of

“=| Patents < ff MW te | Neen ntors who derive |: irge st deserved profits know ? OF a

i si] | and heed certain simple gt SS | wed | applying for patents. Our book PATENT- 1 SENSE gives these facts. iE LACEY & LACEY .“* i ee EY Toi E —_ WASHINGTON, D. Cc. ESTABLISHED 1869 os" but vital facts BEFORE Pa . . ~are rs Sent FREE. ” n FI & es “e ‘

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160 POPULAR MECHANICS ADVERTISING SECTION RN JEWELRY Ay DERATE pps PATENTS TRADE-MARKS Don’t Lose Your Rights To Patent Protection Before disclosing your invention to anyone send 4 for blank form **EVIDENCE OF CONCEPTION” || y q to be signed and witnessed. LANCASTER & ALLWINE 480 Ouray Bidg. WASHINGTON, D.c. | Originators of forms “Evidence of Conception.” . GEARS ‘Smactt The most accurate made and prices 22-Bird de- sign engage- * ment ring; 18K white gold; AAl blue white dia- mond. $1.00 with order, pay $4.00 to Postman; $6.00 a month, 21-Cupid en- gagement ring : with mwtif of / arrows, hearts and cupids; set with three blue white diamonds. $1.00 with order, $5.15 a month WHAT you po— Send $1.00 with number of arti- cle desired, and brief note stating (1) how long at address, (2) age, (3) married or single, (4) name of employer,(5)nature of work, (6) how long in eK, reasonable. We carry a complete lin Information will of gears in stock for immediate ship- be held strictly con- ment. Can also quote on special gears fidential — no direct inquiries sent to em- ployer. WHAT WE DO; We will immediately open a 10 month Charge Account and send selec- tion for approval and 15 days trial. If satisfied you pay balance in 10 equal monthly payments. Other- wise, return and your dol- lar will be refunded. No articles sold to persons of all kinds. Send us your inquiries. Write ror CaTaLoavE 10 CHICAGO STOCK GEAR WORKS 105-109 S. Jefferson St., CHICAGO BLUE BOOK ON PATENTS AND PRIORITY RECORD BLANK GRATIS MONROE E. MILLER, PATENT Lay SER 23-Roman scroll 411-2 Oumar. Building, "WASHINGTON, design; 18K white ELECTRIC I a: nee BA tICAL ANU MECHANICAL E count 1 blue white dia- 20 - Love Knot; 18K white gold set with AAIl blue white dia- mond. $1.00 with mond. $1.00 with one, 45 6 under 20 years of age. a $4.90 a EDGAR M. KITCHIN month, Attorney & Counsellor at Law Pate vt ani Trade Mark Specialist 605 G St. NW. W., Washington, 0. C ow Write for FREE Instructions. Send PA ~ ENTS Drawing or Model dee Sustnination. CARL MILLER, Patent Attorney former member examining corps U. S. Patent Office 260 McGill Building Washington, D. C. DIE- CASTING MACHINES Rr. o. coR Sactoman roaos ~ ERIE PA. 4 ”27- Two blue white diamond: four blue sapohires, 15 Jewels; 4K solid whit« may wrist watch. Complete with ible bracelet set with we erg, triangular cut a blue sapphires Sent to any Adult in- terested in the pur- chase of diamonds, watches > ia or jewel- sbote-tike expensive automate io sovearance Con it’s a Bulova ry. Ten defence. Frightens thieves, tramps, dogs—tool months your friends. Guaranteed absolute y safe. Auto- 26-New Hulova watch 15 Jewels; dust-tite caps"®agg to pay on matically loads magazine and ejects cartridges. radium numerals and hands. Nationally advertised every- paerg: tan Oeder Carns F420 ,,308 care inidges given Free. cash price $29.75. $1.00 with order $2.87 a month. New Friendship Ring _ $42.50 25-Beautiful design, 18K white gold, three blue white diamonds; four blue saphires. $1.00 with order. $4.15 a month. thine. NO PERMITor LICENSE REQUIRED Catch Fish! Eels, Mink, Muskrats with our new folding galvanized STEEL WIRE TRAP. Write for our FREE TRAP OFFER and 1Ba rgain Catalog. $1 Box of our famous Fish Bait FREE to introduce our tra; — WALTON SUPPLY CO., 3502 JUNIATA AVE., ST.LOUIS, MO. aan 1660 Papen ee TTT WE WILL TRUST YOU Pay As Low As $2.00 per Week Hendersons, Harley -Davidsons, Indians Slightly used and rebuilt. Hundreds to select from. Send 10c for list today. MYEROW BROS. CO., 15 Berkeley St., Boston, Mass., U.S.A

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uit] =x .* + = + a = - OU leek dians POPULAR MECHANICS ADVE A Conn for Christmas MeansYear-Round Fun H, BOY! Can you think of any bigger thrill than » have a Conn for Christmas? It brings you chances asure and profit that otherwise never would come fe-long source of joy. Cet in the Band or Orchestra e band, you go places and see things, get the ght whereve - resting events are happening ( estras offer wonderful chances for part or whole engagements at bi g pay! You Play Tunes At Once on a Conn 1's famous easy-playing features and the new in- on methods enable anybody who can whistle to tunes in the very first lessons. No more drudging ses; it’s fun right from the start. , ~ nr FREE TRIAL Easy Payments r exclusive features cost no more. You can y instrument f ot the band ra for free trial in your . Easy payments if you gla lly arrange 1, now for free and details of trial fter, nterestedio, ~ | ” INSTRUMENTS | | WORLDS LARGEST MANUFACTURERS G. CONN, £2., 1231 Conn Bldg... Elkhart, Indiana | tlemer Please send free literature and details of tr te | R.} | | | J KIISING SECTION 161 IWant toSend You a cumease Special: Watch for You to see and Our 21 Jewel Santa Fe Special Guaranteed Santa Fe Special Watches are today be Watches ove (dev ' Watch Sent on 30 civilized country in the Da Free Trial world, and are prob ably the best and most favorably known u atch in both Army and Navy In addition to our NEW LOW PRICE, I will send for your approval one of these Standard Watches, guar anteed for a lifetime of satisfactory service, not only by the Santa Fe Watch Company, but by the Great Illinois Watch Factory So accurate, Government officials carry them: so perfect and beautiful, jewel- ers say they are worth 1-3 to 1-2 more than we ask for them I will send you one to see WITHOUT ONI PENNY DOWN— allow you to wear it 30 days FREE then sell it to you on easy payments WHY NOT OWN A 21 JEWEL SANTA FE SPECIAL WATCH? You will never miss the few cents a day that will make you own one of these watches SEND FOR WATCH BOOK— illustrating in beautiful colors hundreds of designs and combinations in cases in the POCKET WATCH, MEN'S STRAP WATCH and LADIES WRIST WATCH. You can have your name or mono- gram and any emblem you may desire engraved in the Case to suit your own ideas. Write today for Free Watch Book, and make your selection at once, while this offer lasts. FR EE* limited offer! With every Senta Fe Special beautiful gold chain or strand of exquisite pearts M cou por 1 nd Diam Cat Dept. C-6 Thomas poet ied Recon Kansas '(Hor the Grea 1 Fe Mail / SANTA FE WATCH COMPANY / Dept. C-6, Thomas Bidg., Topeka, Kansas coupon, Please send prepaid nd without ot rt Wate Book Free. « to- / Money Down’ Offer on the nta Fe Specia Fe 7 day!, — —mmntmmmne ag AHeenamee + aoe ~ ees ee eee ee

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162 A pound of cheer to start the year SmoKing Topact0S DPE nn. CIGARETTESZ 4 - - D yl, wr the Yule log burning brightly and a pound canister beside him of the mildest, most fragrant pipe mixture that ever came out of the South— what more could a man ask? Give him the pound can of Sir Walter Raleigh Smoking Tobacco for Christmas. It’s protected in- side by heavy gold foil and the canister comes in a handsome Christmas carton. Brown and Williamson Tobacco Cor- poration, Winston-Salem and Louisville. SIR WALTER RALEIGH Who discovered how good a pipe can be milder POPULAR MECHANICS ADVERTISING SECTION THE LUCKY BOYS Will Get Them This CHRISTMAS ow’d you like to have an air rifle t! looks and feels like a real Remingto: | .22 caliber repeater? Wouldn’t any boy | _ crazy for one? Can you imagine a bett mt Christmas present? \ Remington has made just such an air rifle | for you. It’s a fifty-shot repeater built on the lines of a Remington .22 rifle. There are n levers sticking out to spoil the looks an pinch your fingers. The stock and fore-enc are made of fine American walnut and it ha a pistol grip. And, oh boy! how it shoots! You’d never believe you could shoot so far and so straight with an air rifle. It’s safer, too, because it has some special safety features to keep it from going off accidentally—just like a rifle that shoots cartridges. orm en f We can't describe half the improvements in this short space, but you can see them for yourself at your hardware or sporting goods store. When you get your hands on this air rifleand throwit up to your shoulder, you'll know what you want this Christmas We'll send you a circular telling all about it if you’ll write us for one. REMINGTON ARMS COM PANY, INC. Originators of Kleanbore Ammrnition 25 Broadway New York City Remington, AIR RIFLES © 1928, R. A. Co

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I a) M POPULAR MECHANICS ADVERTISING SECTION Rrra, AT 28f7"% MOT 4 Orem Le ee | f ia a os ote P ? ae a4 ot a he » HAT a wonderful Christmas gift! all the Coronas—the finest we have builtin all ourtwenty-years’ experience. No other portable has so many big ma- chine features. None can equal Corona’s record for durability. Attractive Duco colors at no extra cost—and a gay Christmas gift carton. At typewriter stores everywhere. Write for latest catalog. L C Smith & Corona Estat shed 1 ; 1212 Washington St., Svra e,.N. Sales offices in pr al cit oft ' The newest and most modern of Typewriters Inc 163

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164 We Show How You Save Hundreds of . Dollars Installing Your Own PLUMBING and carina Get wonderful FREE BOOK exp! aining how you can do your plumbing and heating “4000 great bargain offers including Sinks.” Water featers, Laundry Tut Sewage Disposal Systems, Fencing rinning, Paints, etc. All Fittings, Tools and Supplies. §-Room Wholesale Cut Prices Bungalow Furnace Rock-bottom, factory, wholesale prices Get full details No firm ever undersells us. on marvelous You make enormous savings furnace, steam here and hot water bargains. Automatic Electric Water EVERYTHING SENT ON APOROVAL Highest quality guaranteed Your money sent back at once if you're not Pa) tely satistied Com- System plete Best t Bathroom Outfit est . water Systems Greatest variety made Our of plumbing Bargain supplies atamaz- Catalog will ing prices. astound you. Save 1/, Startling Plan explains how you can be your own plumber—Plumbing and Heating Revolutionized 4 on Material ~« Save All Labor Cost Our No ou heating amazing plan is simple and easy. experience necessary rhousands of customers do their own plumbing and work Small, Easy Payments Many offers in our Big Catalog sold on small, payments Goods shipped in 24 hours. Largest stock in U. S. All questions answered. BURKE (4) BROS. 429 Liberty Ave., Pittsburgh, Pa. Catalog of 4000 Wholesale Bargains ex- Send your Big Free ital plaining how I can install my own plumbing and heating. Name Address City Showing Merchants S$! 00 aWeek it Pays to Advertise R.0.G f Michigan made $3 5 i —soid 5 machines in 254 hours THE EUREKA ADVERTISER (Automatic Wrapging Paper Printer) state vaden 2 9 days Automatically prin merchants’ * ADS” 7] his wrapping pap t ” bed tor ata only whe ate t wenty rolls of pay F s a- chines in tw t ~~ your commisnio We * prospect on y buy five or more ne fi each paper rack the ise SALESMANAGER, Dept. A-12, 1201 Cortland Street, Chicago, Ulinois New Hook-ups. This book shows how to make Short Wave Receivers and Short WaveAdapters. How to use the new screen grid tubein D.C. and C. Circuits. How fe ’ to build Power Am- oun: p'ifiers, and ABC Eliminators. Up to the minute information on all new radio developments. Set Builders, Fans, Dealers, send for it today KARAS ELECTRIC COMPANY 4028M N. Rockwell St. ‘C hicago, II. Please send me your free book Name Address City State 1028M POPULAR MECHANICS ADVERTISING SECTION ANNOUNCING Three new construction sets for building a 19 inch model of the famous Mississippi R steamboat - a keye State,"’ a 19 inch r | SQUAB BOOK FREE Breed squabs and make money. Sold millions for more than chickens. Write at for free 48-page book beautifully printe colors telling how to do it. You will be sur; PLYMOUTH ROCK SQUAB CO 634 H Street Melrose Highlands, Mass Use Ordinary Kerosene The most startling heat producing burner ever made. Indispensable on the farm, in factory, for boiling, cooking and heating Ideal for butchers, dairies, repair shops, for stoves, boilers, ovens, cooking equipment and numerous other uses. Will boil any quantity desired in half the usual time. soot Think of it! Improved oil burner produc es twice the heat of city gas at half the cost. Regulate (Burns OUTDOORS to any degree desired. Sosimple, @s We// as Indoors 4 easily installed and operated Double generator assures continuous ope a - with shut- Nothing to wear out. St arts in @ ji ffy ill last a tifa Every burner guaranteed fully to give cor ae. satisfaction “I would not take $500 for it if I could not get another,’ wr J.H. Cox, Mich. ‘It is worth its weicht in gold and is the best or market,”’ J. B. Asheraft, O. “Produces terrific heat and saves lot kerosene,"’ writes H. C. Kistler, Pa Also Burners for Cook Stoves and Heaters Let us send you our catalog of Improved THERM-0-GAS Burm HOME MFG. CO., Dept. 2613, 20 E. Kinzie St., Chicago, | to shapely proportions while you sleep ANITA NOSE ADJUSTER is SAFE, painless, comfortable. Speedy, permanent results guar- antee Doctors praise it. No Gold Meda} Metal to harm you. Small cost. Won 1923 Write for FREE BOOKLET BEFORE -AFTER ANITA INSTITUTE, 1212 Anita Bidg., NEWARK, N. J.

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POPULAR MECHANICS ADVERTISING SECTION 164

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166 POPULAR MECHANICS ADVERTISING SECTION We ~T a ga Fe ee FIRST PRIZE. Atwater Kent Electric Radio 2D PRIZE. Complete Camping Outfit, Value $115. 3D PRIZE. ‘Pathex Motion ‘Picture Camera and ‘Projector, Value $75.00. And 617 Other Wonderful Awards, Helbros Gold Watches, Athletic Goods, etc. BOYS! Here’s the snappiest contest ever staged. Two thousand dollars in prizes; 620 separate awards. All you have to do is answer five simple questions—and you can answer these easily when you read the Dorfan Official Contest Folder that you can get at any Dorfan dealer. This free folder tells you all about it. When you read the folder and the gripping page of “Marvelous Railroad Facts” you'll know how to make your short answers. Ask your dealer now for a free Dorfan Official Contest Folder. Wouldn’t you feel just “top of the world” to land that Model 44 Atwater Kent Electric Radio with the classy speaker and seven tubes and all accessories? You can do it! And what about the scores of other awards such as the Helbros 15-jewel, 14K. Wrist Watch worth $40 and Ken- Wel Basket Balls and Footballs. And 2000 handsome Engineering Certificates given away besides to winners. That makes 5620 chances to win! These prize awards are to show the appreciation of the Dorfan Company for the interest that millions of boys have shown in Dorfan Electric Trains. But you don’t need to own a Dorfan to win a prize! All you do is write out the brief answers to five easy questions. When you go to the dealer to get your free Official Contest Folder you’ll probably notice the Dorfan Trains with the famous take-apart engine which you can take apart and put together yourself. Because Dorfan engines are made of non-magnetic metal, * no power is lost through induction as is the case with ordin- /* ary engines made of sheet steel.All the“juice” there is, hums into speed-power. Now, don’t forget those prizes. If your dealer does not have the free Dorfan Official Contest Folders, send us his name and address and we will see ~ . - - y that he is supplied. The Dorfan Company, 137 Jackson | St. Newark, N. J POWERFUL ELECTRIC TRAINS ° with the Take-A part Engine ™~ The Year Around This Gift Brings Joy to Young and Old Shes as you may through the | endless list of possible gifts—you will find nothing that assures so much genuine, lasting pleasure, to everybody, as the modern harmonica. It is easy to learn—simple to play— yet it is a real musical instrument. Its tonal accuracy and musical range satisfy completely the desire for self-expres- sion which is equally natural to girls and boys, men and women. At modest cost, the harmonica pro- vides a gift that is welcomed with en- thusiasm by old as well as young— that means months of joyous melody for the player. ~ AND”. The ideal in mbodying almost two octaves in the diatonic scale. Ten single holes, 20 reeds, brass plates, heavy convex covers finely nickel-plated. In hinged box bearing photograph of the United States Marine Band. Priceeach50c. FREE INSTRUCTION book willbe mailed, postage paid, on request. Just use the coupon be- low, or send a penny post-card. } 7 | | M. HOHNER, Inc. eo | 114 E. 16th St., Dept. 505-M, N. Y. . Please send free Instruction Book | } Name : | ] ! | l Addres ] ge ee

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—— EO SS SS SS SS SS aS aS a a OU SCF POPULAR MECHANICS ADVERTISING SECTION 167 , \ A GuaRANTEED Toot Or UNuimited Utiity As Finely Built As The Most E Expensive Automobile Motor Wit Stanp Years Or Harp Use! NOTA TOY- MUST BE E SEEN TO BE E APPRECIATED f| = = : all Complete With Motor 1 Attach HE W ilb; ar a 4 ‘ombin;: ation Listed Below for $35 0oF. oO. B rain Saw is used and endorsed by _4#.P. 60-evele, 1750 RPM. 110-volt A. C. Motor | 12” x 16" 7 5 oe Spec iw onstt cte d V-Belt | the most highly skilled crafts- ” Combination Saw Iron V-Pulk wt , Iron V-Pulley S ft. Cord and I ios ~ men! It is a finely constructed — 10” Ripping Fence 6" puting Wheel - ‘ ‘ P Adju ble Cut-off jaw Drill Chuck machine that will be invaluable — Mitre Gauge Emery Wheel : 6” Sander 2’ Dado Insert yund the shop, factory or home. Absolutely Saw Guard Large Sub-base, 24” x 8” - } ‘| “4 } : k oo it é ue ] Rs Motor plugs into ar light socket and you're read npact. Note base which makes it a rea port- for work. Planer attachment to smooth pieces up t 3 2° wide can had r ily $10.00 extr ) e outht. Phil is Apes ( ve D » He his sturdy machine will make a « it up to 24 ithe ut py nend tor Frees lder of ful w details 1 owe Ibar ing. It will rip, cross-cut, bevel, mitre, groove, mi Wilbar Workshop), and other Hardwar enon, drill, rabbet, buff, grind, sand : and polish At. are quickly and e: asily adjusted. Bronze bush- yn each end of mandril with grease cup is only one of many points of superiority this saw has over others. feature provides perfect lubrication at all Wilbar Jig Attac — “ceeee THE WILBAR CO. y and acc irately marks. Easily ns le ee 0 2012-14 E. ARIZONA ST., PHILA., PA. i i CC ELL LOTTE I RT Ce ee eee ee ee ee PO ‘New Food Idea Pays Big Profits! | []R WIN AUGER BITS | | en! Investigate th onderful NEW Bro Bobby ASI LESS D nk hnut. Selislike wildfire! You cam esally make DEMANDED BY ELECTRICIANS, CARPENTERS, PLUMBERS, HOME MECHANICS, INSTRUCTORS eek spare time; $5000 to $8000 year fulltime. Investment No expe rience ‘heeded. Write today for big special offer. THE IRWIN AUGER BIT CO., WILMINGTON. oO. Food Display Machine Corp., Dept.1359, 500-510 N. DearbornSt., Chicago DO ALL YOUR OWN PAINTING | New—Quick—Eas yWa Pps i flag onre sh Elec tric ne can Own a spray ou qu Spray Pied pe ce painting easy ee ana i cate ¢ sw e it would be = Outfit impossible with a brush A wonde il an h-g e finish 18 apphed as if by j —— lightning Your Auton bile Furni ture. Wick: > ie Screens, etc or in fact i anything around the house can be finished this 20th Century w Ly \ ou 2a ‘et | have to learn to operate these outfits, as the KB Seces Gun iteelf is the skilled workman Agents Wanted FOR FREE WRITE ‘route: (Xxceum Clearer $4.95 A ““KOCH BROS. MFG. CO., Dept. 31, 2335 Nelson St., Chicago

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168 $4 $4 Down—$1 Weekly Here is an exceptional value. A finé quality, genuine blue-white diamon full o fie ry brilliance is set in this macnificent lady’s ring. The 18 Kt. solid white gold mount ng is hand en- ¢ graved in_a fascinating bow-knot #4 sign. Your friends will think 4g you paid at least $75 for it, io akes a marvelous ft Days Oo” Trial SEND NO MONEY Just fill out the coupon below — that’s all, When article is delivered, pay the smal! deposit to the post- man and the balance in small equal payments taking one year to pay. MONEY BACK ° GUARANTEE You assume no risk in buying from this old established reliable con- cern. You have 10 days free trial, If you are not satisfied that whatever article you buy is not the biggest bargain you ever saw, re- turn itand we will refund every cent you paid. Al! credit dealings are kept strictly confidential. No red tape — no needless delay. ee | LOWEST PRICES wt EASIEST TERMS Try as hard as you please, you cannot buy elsewhere and get as good value for your money. The terms are so easy that you'll never miss the money. Every- thing sold on written guarantee. WRITE FOR FREE BARGAIN CATALOG It brings our large Jewelry Store right into your home. Gives weights, grades and complete description so you can buy diamonds like an expert. Gives you in- formation other jewelers dare not tell W Fine quality, biue-white genuine diamond set in man’s massive 18 Kt solid white gold en «raved ring. $110 7 fine quality, genu diamonas set in solid 9 8: $9 Down—$1.80 a Week , blue-white diamonds and 10 are set in this magnificent 15, Kt. solid white gold, engraved dinner ring. Equal to any $150 ring Here's the very :atest style man's strap watch. Choice of white or green 14 Kt gold filled case. It is fitted with a 16 jewel BULOV4 movement guaranteed - curate meena, , Equip 1d with pa 4 Diamonds—4 Sapphires|;. are set in the dain 14 Kt. solid white id case. Finest {3 je vel movement} ranteed an accurate gh ented “* pusT-T * cap which heed av om rosgrain rib! dust and dirt drome entering movement und to like this smali|Radium dial—removable straps. Soild on wrist watch. Vay presenta: Ga) case. Reduced from $55. verti i $4 Down-—$1 Weekly. $3 Down— ‘si Weekly. ° AGENTS WANTED—EARN $100 WEEK. WRITE FOR DETAILS STERLIN rg & WATCH * DIAMOND IMPORTERS— NC 000 sTocK— ESTABLISHED 1879 _1540 BROADWAY ___ DEPT. 2 2550 NEW YORK STERLING DI DIAMOND & a WATCH ¢ CO., inc. 1640 Broadway, Dept. — N.Y. ()Please send No._..____pric on ten days free trial. I agree to pay for it according “ys your terms. (Deposit can be sent with order if you prefer.) Send me your FREE, beautifully illustrated catalog. credit at Bationally ad- §$ sed treet Address ity & State POPULAR MECHANICS ADVERTISING SECTION DOES AWAY > WITH POLISH A marvelous liquid called Nu-Rex—a new fluid of amazing properties which does away entirely with all polishes and waxes—has just been discovered MAKES OLD CARS LOOK NEW Nu-Rex re juires no rubbing, painting, cleaning or w ing Just the sweep of the hand and the drab surfaces vanish before your eyes, and the hidden « gleams forth with wondrous iuster from under t marvelous protecti apply Nu-Rex in washing your car $100 WEEKLY DEMONSTRATING Nu- — This is a proposit at will make car owner wants a demonstration, I will make a sale, and every will bring you repe business In spare time you can easily make $5.0% $10.00 per hour for yourself. REFINISH YOUR OWN CAR FREE Right now men are being appointed in various localitir cover a few ing——so easily minutes’ time Anyone « it’s easier t ion th yon ig mone very dem sale to take care of the big demand Sam ple ipply of Rex furnished free to workers ro get full partic and free iple offer, send your name and addre once to NU-REX PRODUCTS Co. Sta.c. Dept, 100 __ Milwaukee, Wis A PRACTICAL COURSE IN MECHANICAL DRAWING By WM. F. WILLARD k for home study. Each exercise is « of the student by practical applicati practice 160 Pages. 157 Drawing Price $1.00 Post paid POPULAR MECHANICS PRESS 2° Ani in the every leal b mind day €. Cotario St CHICAG TRY THIS RAPID NEW EASY WAY TO Put aside slow, messy paint brushes and give ever ing ‘around the place a new, handsome fii sh this quick, efficient way. Haywood improved Payntgun makes paint- ing Autos, Furniture, Woodwork or any surface a joy! Try it yourself and see how surprisingly easy it is to get highly superior results. Now Anyone Can Do Finished Work—NO Streaks Smooth, even coverage—no streaks or brush marks. Beautiful blends and antique effects easily obtained. Old rundown furni- ture and car surfaces restored to original show-room beauty Send Only $1.00 Simply pin a dollar bill to this coupon and mail t« aay Your Payntgun, con ple te with I t sprayer P p, tank ar hose will once for $8.65 C. O. D. plus postage, or ; ree trial. We trust joes not t you return i 1 good ditior ip refunded at once D> t at 1 Keep things brightened up easily j ail coupon TODAY Send for Literature Haywood Company 2330-T Ogden Ave., Chicago, Illinois ) Attached find $1 00 Send at once H ‘ wood Payntgun for $8.65 C. O. D. plus postage, or 8 Day Guaranteed lree Trial '¢ ) Send Literature j Name f adar ee ee eee ee ee ee ee Des se ee es ee ee

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POPULAR MECHANICS ADVERTISING SECTION ye peconer. \“No-FrRostT’ Offers 5a Here’s an absolutely new money-making idea. easy profits—quick profits. 169 SHIELDS CLEAR j Brings : You can make $50 a week in spare time $100 a week in full time—helping me handle orders in your territory for No- big profits— Frost. No-Frost is a new scientific preparation that is absolutely guaranteed to keep steam, frost, fog, rain, sleet, mist, and snow off auto windshields windows, eyeglasses. Think of it! Keeps glass clean, bright and clear in all kinds of weather. x * : ron Anyone, Anywhere, Can Make Big Money Det SHOW WINDQWS nyon , nyw r +] an a I on , vou do is demonstrate to housewives, No-Frost on the glass. It doesn’t show. It won't mobile owners, stores, garages, etc., and take streak, smear, mar, or scratch. Yet keeps glass tie { rders. We don’ t sell to des ilers. All business clean and clear as crystal. A necessity for every auto owner, be your locality must come through you. You *orekeeper, street car conductor, locomotive engineer, house- ; et the wrofit m every order. Lv Ty d ne wife, and everyone who wears eyeglasses. Prevents accidents Y / : y ave emon and takes the place of mechanical devices that don't work tion brings you 2 to 4 orders. Just put a little half the time. Wis — VAUGHN CLEARS $125 IN ONE WEEK iughn, Ohio, cleared $125 in one week and says is more money and friends than ever before. \len and women everywhere are making amazing rofits with No-Frost and my 350 other fast-selling ducts. H. Heintjes, N. J., cleared $30 in 1 day. M K. R. Roof, 8. C., made $50 the first week in re time. Mrs. B. L. Hodges, N. Y., averages $18 $20 a day—day in and day out. H.C. Hanson nped his pay from $25 a week to $75 a week— do and say in this easy pleasant work. You don't risk a penny Yet it’s an opportunity to pocket hundreds—yes, thousands of dollars in clear cash profits. You can make $10 to $20 a day—right from the start. JUST MAIL COUPON Introduce No-Frost in your territory while it’s new; before imitations are put on sale in the stores. Skim the rich cream off the profits. Clinch a big permanent, repeat business Make more money then you've ever made in your life before Get the facts and read the proof. Mail coupon today—NOW! Stee eeeeeeeeeeeeeeeee Albert Mills, Pres., 750 Monmouth Ave. Without cost or American Products Co., Cincinnati, Ohio send me full deta | he works only part time. You can make these y profits too. obligation ls about the money- SEND NO MONEY making possibilities of your amazing new product NO-FROST | Name ist put your name and address on the coupon. Give me a chance to prove that you can make $50 Address... to $100 a week. r experience, You don’t need capital, training, I furnish everything and tell you just what to +4 SS ae Flying Cloud Model Miniature model finishes 20° | Co details, Set consists of Hull Block, 3 Blocks, Steering wheel, Anchor, Bell, Capetan .Bitts, Flag, Spar materials. Rigging Brase wire, Pins, ete., also all materials for Deck Houses and rails. Com- plete set with instructions, $10.00 plus px e for 5ibe. Hull shaped and sanded, $1.00 extra. Figure bead 50c. (Print or write plainly) “SPIRIT of 7 ok DESCENDING IN PARACHUTE Also Something Sensationally New! tiful new line of Sailboate that really sailf Totally unlike anything you have WN b 4 before it vey can't sink nor capsise. Have sutomatic rt ~ & control, | nished in brilliant colors, authentic and carefully rigged. Our “Captain” \ i> | 2 25° racing dem ready to sail is ed $10.00. Order one today. Or send p Vy S r our big Ship M« del Supply cata! a ROY HANCOCK, 323 Douglas Ave., +iL en d Portsmouth, Va — + NATIONALLY KNOWN MFR. WITH COUN- try wide sales organization, splendid mfg. plant, ample \ position to develop big sales in a short time on any item that Rta, into his business. 110 UNIQUE MODEL AIRCRAFT CO. Address Charles G ; a‘ Dallas, Texas ; capital, annual sales running into millions and invest- PATENTS PENDING i ing half-million annually in advertising, desires to add i and market new articles of merit. Patented household THIS HELIOCOPTER is a recent invention by a former U. 5 1 and mechanical specialties especially desired. Mfrs. expert aviation mechanic. Heliocopters, the dream of inventors, ! and inventors, having worthy articles which have not may help solve the future problems of aviation “Spirit of Ze th ! developed successfully because of lack of capital rises Vertically. Parachute relesste sutomationly when © Oem la I 1Cce ily because pital, down, protecting the craft from the fall. Just what you have been nio sales organization or other reasons, should get in waiting for. Made of expensive materials, including brass fittings i connection with advertiser. Owners of newly and fine silk parachut: Assembled in two minutes and GUARAN- ! patented household and mechanical devices, ready TEED TO FLY. Order now and get a real novelty for the holida ! to market may find it extremely profitable to write, Price, postpaid, insured mail, $3.00. If real handy with tools, you i civing full information, for the advertiser is in can make one yourself. Plans and specifications, 25c. In ordering, i print name and address to avoid mistakes. Do not send stamps. ] ! J Perry, 7th St., St. Louis, Mo. Dept. H, 5725 Oram St.

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170 POPULAR MECHANICS ADVERTISING SECTION Get our big new 1929 Radio Catalog— hot off the press. Con- tains thousands of amazing bargains. Latest, nationally ad- vertised Radio equipment. Latest in Ham Transmission equipment. Everything at lowest wholesale prices. NEW RADIO CLUB—Big Prizes Get all the facts } ng “Ether Trappers” Club, now. No dues. Many advantages. Write for tai FREE ship at once, This Big Book of money- saving bargains is yours FREE. A regular Radio pthc Write today for your copy of this book, AMERICAN RADIO & MERC. CO. Dept. 26 American Radio Building KANSAS CITY, MO. - SOLDERALL rs | s. fg _ tN PASTE FORM . Se Cc Clyde Ges rr, Famous Buescher Saxophonist B beam Sow Oe on the Big Mone and a sae of Fun First-Class Saxophonists make big money and the Every Electr ical Connection needs Solderall for perfect reception The SOLDERALL CO., NEWARK: INTERESTED in | pared hate and pl sant. You might easil become = TELEVISION? fom Brown or a great record-maker f. ‘ , . . , . } Wri r literature on 7 like ( lyde Doer Ol sent le Kru ger Or Jose ph fawn y The can SP E i] D « Smith. $100 to $500 weekly is not unusual for TROL CLAROSTAT® p of correct scanning dis k oper t Brings in screen image and } See -this latest Clarostat; ir ¢ case, amply ventilated, protect screw terminals; controls smal such musicians to earn. PRICE $500 tor from standstill to full spe« pushbutton for quick start and 1 BYUESCH mentary acceleration; 25-500 ohm fixed or variable resistance True Tone Saxophone CLAROSTAT MFG. CO., Dept. G.H., 285 N. 6th St., Brooklyn, N. It’s the ideal instrument for social entertain- SPEED TAT ment. It is a key to social popularity. At parties, cI everywhere, the Buescher Saxophone player is the center ot attraction. REG. U. AT OFT Easy to Play—Easy to Pay The Buescher Saxopl o play Y 1 don't have to be talente« bi dies bt g eas ‘ y, we n e it easy to pay for B er Saxophor Play and earn while you pay Only a Buescher 5 ves you these extra feature Sr n Pads, greatest improvement, easy to rey ceme Patented Automatic Octave Ke erfect S \ I onvenient key arrangement . a on anv Buescher Saxophone, Cornet, 6Daye irial 5... ment Fil itandr ] pon for rmat Mention instrument in which y re terested Buescher Band Instrument Co. 2617 Buescher Block Elkhart, Indiana aE NEW 1929 Catalog ts ee ee ee ee oe ee oe ee ee ee ee crammed full of the FINEST, ND INSTRUMENT CO (485) I NEWEST, Nationally known A: 7 Buescher Block, Elkhart, Ind | | C.sets, consoles, cabinets,dynamic it ob'igatir me ur . nle end speakers, kits, eliminators and ac- : ; . | cessories at Lowest Prices. Largest stock of radio ¢ parts. Prompt delivery. Write for our Free catalog ; - 1 | WESTERN RADIO MFG. CO | | 126 W. Lake St. Depot. PM-12

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POPULAR MECHANICS ADVERTISING SECTION Enjoying Fan Confidence! TONATROL Trade-Mark Concerts, sporting events, speeches, jazz— how much better they come in if your vol- » Con- ume is just right! b Tonatrol enables you to control volume smoothly and adapt it to each occasion There are types designed expressly for your circuit whether it’s battery or A.C. Can be had with filament switch or power owiti h attached $1.50 to $3.00 Pats. Pending r “103 4104 ;

TRUVOLT All Wire RESISTANCES Reg. U. S. Pat. Off. The ideal variable, fixed and tapped voltage controls Truvolt Variables simplify B-Eliminator construction by eliminating difficult calculation and making all adjustments easy. 22 stock types $3.50 each. Truvolt Fixed resistances are adjustable to different set values by the use of sliding clip taps—an exclusive Truvolt feature! Made in all desirable resistance values and current ratings. Electrad specializes in a full line of Controls for all Radio Purposes, including Television. Mail coupon for full information.

Pastor STOP- | § 00 CHRISTMAS SPECIALTY 7 Salesmen and Agents wanted every- WATCH if fe P a y where to sell stores and homes our beau- tifal Christmas Windo “ Display Carc F an 4

no Christmas Sales Cards, ““Usetul Holiday “Gitte” and 20 other wordings Sold day or evening alone or as a side line; ideal with Christmas Greeting Cards. Cash sales: no order taking Write today for free literature Consolidated Co. 65A Wes! Van Buren, CHICAGO ination Watch and Stop-Watch. luable to inventors and scientists; } hanics and machinists; engineers, f Keeps accurate time and gives ' Hourly ®@ second timing independently. : in U. S. A.’and used by the ‘ , nent after tests proved it the rable stop-watch made Un- ble crystal, nickel finish case. teed STERLING STOP-WATCH CO,, 2x RE 20 Sirus.

ENJOY % THRILL’ ELECTRIFIED RADIO at SMALL COST Banish forever all the annoyance ard expense of buying new “B”" B itteries with a row NSEND “oR” POWER UNIT. Hooked up in a few moments—and you have permanent »ovre r rom your light sock

y) = > Pa 2 wa =z ® = > =< ® = °o s Recharges RUN-DOWN OR WEAK **B” Batteries (dry) overnight. Makes them last three times as long Uses less current than 25-watt lamp For an ttam DC or AC any cycle Don't throw that time on. Use same tubes now away your “B"’ batteries—invest $1.00 in your set. No changes in this guaranteed charger, renew their You'll be amazed at the way life and save mone; No extras to buy Townsends improve your recep iy tee —_ idd to distence getting e 0 1a 50,000 ow se No Harmful Acids—No = [ <n coupon today for full infor- 5 Tubes to Burn Out mation and free trial offer. ‘ ; $1.00 Send $1 00 currency, st amps, check or Townsend Laboratories, Chicago, Ill. .

money order, plus 10c to cover mailing ——— COU PON - ee ee cost Charger will be sent postpaid sa inaaila - Complete If not satisfied, return within 5 days FOWNSEND LABORATORIES, bo/ <8 Dept. 15. 713 Townsend St., Chicago, IL. and your money will be refunded a ry mail = = | Please send me full information on the Townsend “‘B"’ Power lay NOW You can't lose—we guarantee you and Free Trial Offer sction or money back ROLL-O RADIO COMPANY ee | Address......... Jept. G-23, 3rd and Sycamore Sts., Cincinnati, Ohio |

TrARrTPPT A ..hUC RK TS OSS kar ee A Peres on ae me eee -_

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POPULAR MECHANICS Profitahle-Useful-Interesting A HOME CRAFTSHOP i \p £4 AKE the things you've always wanted to \ oN * make—at home—with this complete equip- ff ment of high grade motor-driven tools—use- . ful, beautiful, salable things of wood for home, = yard or garden. Handles every wood-working job K from the simplest repair to fine cabinet work In- ™~* cludes the famous H & A Wood Lathe, Rip gt Roby Scroll Saw and complete accessories. The ! . ‘ motor drives the whole outfit; JUST PLUG INTO Ls rHE NEAREST LIGHT SOCKET SOT B iton the H & A unit plan, if you choose—Just NE] - items you w ant or can afford now, and add ot S as you need them Use it for your own Wy plea e and recr ion, or turn your leisure hours into cash by making things to sell What a Wonderful Christmas Gifte / An outfit to delight the heart of any man or boy who loves good tools All items priced separately, - so 1 can make up your own assortment All \ easonably priced WRITE TODAY for descrip- fia tive literature and price list ~~ r —_ HESTON & ANDERSON oe 1612 Western Ave. Fairfield, lowa «| aMotorLike This! ' = 4cylinders bring new thrillsto ou &Y ing. The Super Elto Quad drives racers better Je than 35 miles per hour — comfortable runabouts at 25 miles — cabin cruisers at 15 miles. Brings luxurious motor boating within reach ofall. Send for catalog of Quad and other Super Elto models. ges ©The Super Etto’ ELTO OUTBOARD MOTOR CO., Ole Evinrude, President, Mason lia St.. Department AA, Milwaukee. Establish a Good Future DON’T BE A SHOP WORKER START a business of your - own NOW—no experience necessary The only key machine that cuts ALL kinds of keys. No hand-filing Make first keys by number without taking locks apart Instructions furnished free WRITE TODAY BEISSER KEY MACHINE COMPANY 407 Fort St. East Detroit, Mich., U.S. A. DODITITT ARP MECHANICS ANVERTISING ADVERTISING SECTION > Prevent the ups and downs of your tubes. Install AMPERITES— the filament control that keeps voltage constant. AMPERITES insure long tube life and better rece ption. A type for every tube — battery or A. C. $1.10 with mount. Teadiall Company ing (in U.S.A.) SSUYEANKLIN ST., "NEW YORK FREE New)" Am- perite Blue circuit di lagvame. Write Dept. } RITE The “SELF-ADJUSTING” Rhcostat 00 DOWN 10 Day FREE Trial | You can have a ge nuine L. C. Smith (the orid’ 6 only ball b part at } writer) for $1 do est price ever o r Easiest ter All the | 1928 sperating "stan bn t Re-newed G 1 |ARANTEED FOR t | YEA wn ar e shit No red tape i - Trial. Free Type Course, Tool W ~ .. Cover i seu ane Write for $1 down o “offe rand free manual Smith Typewriter Sales Corp., 11C-360 E. Grand Ave., Chicago, I!!! Lathes $6.00 to $75.00. Largest : line of small lathes in America Brings Send six cents for 32 page catalog this Lathe of lathes, drill presses, bench saws, jig saws, band saws, etc to You SYPHER MANUFACTURING COMPANY Dept. D Toledo, Ohio HS PAINT » SPRAY | DOES THE WORK OF QUICK, EASY PROFITS ! ! , Practically no investment. Small space undandBIG I PRO}! autos, furniture— paint! housesand barnswith HB quick spray n eth (ne man does the work of five with br = for itself on easy monthly payments JAYS’ TRIAL Write today for details HOBART BROS. CO. 30 DAYS TRIAL Box M1251, Troy, Ohio QUICKLY PAYS FOR ITSELF. required. Steady dems I'1S refinishing usli In beautiful wainut cabinets THE MOST ASTOUNDING OFFER Ever made in radio Tuned radio frequency circu't for Tone Quality Guaranteed ‘or pet icctivity ollowing s i $0 © k og k. } . , Ox 26 $ ! t $ \ I i t iUxX Dept. Ps ene Linccin AG GODWIN co. ytZA0, Lines DEALERS IN BANKRUPT stocks SECTION

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abinets FFER fio circuit uality tivity POPULAR MECHANICS ADVERTISING SECTION 173 tortheTool Room- LATHES / teers New Model South Bend Machine Shop-Repatr

Manufacturin Shop Service Station Back-Geared Screw Cutting ) Precision Lathes the same plant where 40,000 other h Bend Precision Lathes have been ured for the United States Govern- Ford, Westinghouse, Bethlehem Steel y, U. S. Steel Corporation, and hun f other large industries in the United nd 78 Foreign Countries. Easy Payments if Desired ll down payment brings you any » use while you are paying for it. We ediately upon receipt of the down

‘ Junior Back Ge: ared $ y Cutting Bench Lathe 150 16" x 6’ New Model South Bend Quick Change se § Gear, Back Geared Screw Cutting Lathe 540 Other Popular Selling Sizes The Prices of Popular Selling S zes with Countershaft and Equipment

' Standard Quick Size of Lathe Shipping Wt. Change Gear Change Gear ue a x 3° 490 lbs. $235.00 $270.00 a x4 725 Ibs. 300.00 335.00 +4 Quick Bel’ s Gest $335 13" x 5’ 1110 Ibs. 352.00 402.00 , ————- | gle Eo 1550 Ibs. 130.00 490.00 | 16" x 8’ 2035 Ibs. 510.00 570.00 Used by America’s Largest Industrial Plants The best proof of the quality and accuracy of South Bend Lathes is that they are used in production, tool room work and in general ma- chine work by America’s largest industrial plants. For example General Electric Co., Western Electric Co., Packard Motor Co., Oldsmobile Co., Houdaille Engineering Co., Victor Talking. Machine Co., Black & Decker Mfg. Co., International Harvester Co., and in many departments of the United States Government. rs 4’ Quick Change Ges ar “ $908 FREE — Write for No. 89-A Catalog ra « Driven Lathe - describing 57 sizes and types of New Model South

Pr . Bend Lathes. Check off in the squares of »“ 4 Ne * a ~ coupon below, indicating Lathes and Books,” EG . . ° é @ a”. “att in which you are interested. ow SES * at COA Ok 4 P o$ “a SOUTH BEND LATHE WORKS = Sess roa srr Vy > Main Office and Works So Sagres 644 E. Madison St. Pd os Sev South Bend, Ind., U. S. A. Po ee ives > —— — —4 New York City, J. E. BEGGS CO., F hy LO a Brake Drum Lathe 183 Centre Street oe O72 Sea ¥ indles all Brake Drum work with- Carried in Stock by Machinery °° o OX RS Lathe, Wheels to 32" diam. $475 Cities Throughout the .»° PS SAY. Sf Lathe, Wheels to 36" diam. - 650 World. os Vike MEW” ef } Lathe, Wheels to 42" diam. 1400 oo SPELLS: FE SS SF oe ss TOPS FC - ~ re

POPULAR MECHANICS ADVERTISING SECTION 17 wt

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174 POPULAR MECHANICS ADVERTISING SECTION ;

WITTE TREEAND LOG SAW OUTFIT FULL YEAR TO PAY BALANCE A = t C tt S.= Now you can get my latest improved tree and ras u er SSS ‘ log sawing outfit for a small,

factory-to-you, down payment of $25.00. MAKE MONEY THIS WINTER clearing land, sawing wood, cross ties, fence posts shingle butts and other kinds of timber. CUTS 15 TO 40 CORDS A DAY on a little cheap fuel Easy to start in all kinds of weather. Plenty of steady, low-cost power. Use the engine for feed grinding ri shelling and other power jobs

\¥ | Magneto Ving”, Equipped Cash or Your Own Terms \ Full Year To Pay—No Interest. My Life- time (Cuarantee protects you Write for Special Tree and Log Saw Folder, and new, low, factory-to-you price list. > Save 25 to 40 per cent Over 250,000 WITTE - Sawing Outfits, Engines and Pumps in use. Ls ED. H. WITTE, Pres. V WITTE ENGINE WORKS ENGINE BUILDERS SINCE 1870 7749 Oakland Avenue, Kansas City, Mo. 7749 Liberty Street, Pittsburgh, Pa, TIILILILLILILILLLL 1 Mat 5

ABARARRARARAAE ~

Change to Tree Saw in 3 Minutes Saws them down level VAAN AAAY

Cal. 30-40 Six Shot pr

— KRAG CARBINE Price | ne qualities of a high price r d conditior | jit a working parts $ ar. Send today for our Free 40 atalog of money saving values and ( goods. Deposit juns, Ammunition, Cutlery, Sports « yov't goc required on all orders Money refunded If not satisfactory } W.Stokes Kirk,1627-P.M. North 10th St., Philadelphia, Pa | METAL TURNING LATHE $49.50 o All th In fine use guaranteed fo 50-page illustrate

Also 7 in. swing 3 speed cone pulley Speed Lathes $10.50)

New Outing Kit $5 Goodwin Mfg. Co. crrimnn iowa A Gift for every man and boy

Six Power Pocket Telescope t bser listant —— bjects with eaxe and clearne CHLORINE HOME TREATMEN1 Scout Knife th sturdy cutting blade, screw driver, For those who suffer from Colds, Bronchitis, Catarrh, Whoo} reamer. bott ind can opener, is a it r necessity Cough and respiratory diseases is now available for home . : ‘ Bel EES = | Pour the contents of ampoule into vessel and breathe the m« Reliable Compass, pocket size, is indispe ible on } cated air in yourroom for one hour. Treats one to six at & ae < This simplified treatment, endorsed by thousands, produce Pocket Magnifier that is always useful Con poe pnb aren with elaborate apparatus has At your dealer, or direct, postpaid, $5.00. ; Special Offer Three Home Treatments WOLLENSAK OPTICAL co. . Mailed prepaid onr ce pect SLO or 854 Hudson Ave., Rochester, N. Y. Medical Products Corporation Detroit, Sateh.

JUST OUT Spors No. 9 Combination Pen and Pencil

AGENT’S 66 Sells for $1.35. Make $15 Ideal Xmas Gift. Comes in SAMPLE Cc daily easily . Sdifferent Holly Box. es Guaranteed 2 years. ee kK Money bac SS I if no oe pleased i) ee i — _ fitted v Write for FREE WHOLESALE catalog. smooth writing STY LO 1 F.SPORS & CO., 1028 MAIN STREET, LESUEUR CENTER, MINNESO’

176 POPULAR MECHANICS ADVERTISING SECTION

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2 | MBRWBAABeBasBawaawawy POPULAR MECHANICS ADVERTISING SECTION 175 Give Hima $° Wins Masonic Gift! Bb as. Heavy cou Gifts that he will SOLID appreciate Latest style, genuine leather, 5 GOLD PIN window pass case, with gold trimming. Masonic or Shrine , emblem stamped on free. Name t the right size. Latest style. A or other pone 35c aline extra. ting remembrance and an appre- Our leader: it’s a dandy. 9 win- ited present. Large variety dows $1.50, 13 windows $2. Masonic, Chapter, Sand § 00 0° A NOVEL CHARM Degree, Shrine, Grotto, A most mysterious watch charm of E.S., De Molay SEND FOR OUR CATALOGUE heavy plated gold. Shows the — and Compass when revolve rs Some- thing different. Packed in an ‘= 00 REDDING MASONIC SUPPLY CO. INC. (Est. 1859) Dept. P. M., 200 Fifth Ave., New York attractive box. Catalogue suggests many other gifts. eee we FOR YOUR CONVENIENCE -— — ~- — — — — —— \ ic cnn bi eee een ee a ee Rete el GR tidwhecdeeeteceee bands eke Enclosed find SOT. cc ee eeO OSS HOSS EESHESCHOHOHESOCESESESEC® State ecoeceeseoeeeeseeesesesese $ eeoccececeeeees . > ™ ROW LEGS? fl MODE L AIRPLANE | MOTOR THIS GARTER ( Pat’d) ' Tanks. se pr tor for model aircraft $4.90 Makes Trousers Hang Straight IDEAL CuhisT3 ful little or. "bends omens alii. If Legs Bend In or Out 7 Amalgams ate -d Sales & Service Corpor: ation Free Booklet—Plain Sealed Envelope eK. 542 West Souleward Illinois _ THE T. GARTER Co., Dept. FE Information on any book free. Write eosin South Bend, Ind. Mechanics Press, Chicago, IL. Boice-Crane Workshops $48 and Up! Boice-Crane specializes in workshops. Five are illustrated in our catalog. One of them is sure to meet your exact requirements. Send 10c for the new 1929 Boice-Crane SO0-page catalog describing e-Crane Workshops consist of individual ma- shown and are better for your shop because chine is always ready for use—no attach- to change. Each machine is efficient, accu- owerful and far superior in size and capacity. t be compared with flimsy attachments. Will do the five workshops, individual machines r work and a wider variety of jobs. All machines and Books of Designs. 1 at one time without interference. You are not . “one man shop In all our 14 years experience mat ch ne manufacturers, these new e machines are the greatest values f Tered at such W. B. & J. E. Boice Dept. P. M. 12-D Toledo, Ohio As Illustrated Band Saw, 12” $35.00 Universal Handi- saw $30.00 Universal Jig Saw $12.00 Handi J ter, 4” $28.00 Lat! 77x41" ( t ( $26.1 lathe, $13.50 Complete shop as shown with two ‘s h. p. motors belts, pulleys, tools, $192.60. POPULAR MECHANICS ADVERTISING SECTION 177

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176 POPULAR MECHANICS ADVERTISING SECTION Kills Glare of Bright Lights —, i 4 OPPORTUNITY / ht for men who want | to get ahead in a , ANENT, WELL PAYING BUSINESS for themselves. Hundreds of men all over the country are m — BIG MONEY sharpening saws on oley AUTOMATIC Saw Filer. _ wz else like the Foley—it files saws itom itically better than the most expert hand filer, and faster too | No Competition with | FOLE Matic SAW FILER

y ire ti e business. You can get } de af tha file — iro! carpenters, c tractors, ‘fa te s ch ls, t enet ¢ Ww n it rdware stores, saw mills, wo ioe = lly plants tha t t . ts due to gla aie i i busine th suanie, the Luse The Libe ” Jang ak ving & oa the Foley files them AUTO ML ATICALLY. with $5.00 AN HOUR TO MEN WHO WIL. el and trues eS Se ae ee HELP INTRODUCE IT dw lo for ther n your F they wil fe . 7 a = - aw I give yo “all th » busine ‘ Sarl onan. E. Fuller Made FREE SAMPLE OFFER $3. 00 in 40 yunpeoperynall that they will be able to make demonate roe tal | 5 to 8 hand eaws h saw filed and averace Liberty Menatosterng Company, ys: a |

5to8 hand saws an ¢~ our easy.

rry ‘> s ° _ Nee — 7 o \ “ a pi ‘. l am a carpenter work- aa = od 1 cae waiting haters ‘ . os ae I got my machine. Have ay 100 Gay anc he — * ToD be )saws a tl Ps already made $130.” * * * rae my mech P aa mont : > 7% 1-ir w wing “rene ‘ rol s 8 d -_—_ ope From Nel Emstad have sharper 1ed « rver 2000 | (=F = © . eS at rise Have filed 225 saws saws with the filer — it , * man eat ar autifu and works absolutel co. 38 . aad a ‘ you all assen perfect Not bad for L ne coreg says L. J ; = i SS SS. r < detin. - -== C Speedo -Plane Fi = = — Sek nee o-Plane Flyer 3 Rises from the ground nome to great I sights 2 nd lide * pe orfectly t Money-Making Plan Has ‘wing spread of 16 inches. Motor stick. 14 tn nen —, See ne, Oe peller ‘Mat h its performa ce a i ty r 3 I

| SPEEDO MANUFACTURING COMPANY Dept. m, 283 Albany Av SROOKLYN. y NOW! You Can AIRPAINT| It’s easy ¢ pa hye Homme Suttte $10.50 Paasche. Airbrush Co., 1955 Diversey 7 CHICAGO

FREE

OXO0-GAS | Oil Burners {| Will Heat Sov, Ronses, Cotter Steam Tables, Tanks, | Vuleanizers, Water Coils, Rendering Ket

MAIL THIS COUPON TODAY

ae ee ee ce Ovens, Griddle ots re ' Foley Saw Tool Co., Inc PM 12-28 | B | | ‘ —_ - | ’ Ls id Pot 4 | 234 Foley Bidg., 11 Main St. N.1 | Machines, ete. | Minneapolis, Minn. No Noise—No Smoke—No Soot—No Ashes Gentlemen: Please send me Free Plan to build a business | Require No Mechanical Skill to Operate | filing saws on the Fole | Can be Installed in 30 Minutes | | Last a Lifetime | i Responsible Dis te utors Wanted | ot ; Wy role for 1 u ted catalog. [Oty Ste | |] DORAN OIL BURNER co.

111-12 No. May St. CHICAGO, ILL.

170 DOPYDTITT AVP MECTANTSC OC ANWODTICINGC croenmrpAar

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POPULAR MECHANICS A Condenser That Has Made Radio History . ra i A TE AE | | The Hammarlund ‘“*Midline’ Condenser holds an enviable leadership in the radio world. ts super-quality of desigr performance makes it the choice of radio engineers and experienced fans. Be safe—use Hammarlund Condensers in your receiver and enjoy radio at its best. Write for folder. HAMMARLUND MANUFACTURING CO. 424-438 W. 33rd St., New York, N. Y. For Betton Radio ammarlund PRECISION PRODUCTS DON’T INVEST Until You IN- ». VESTIGATE the ~MULTICRAFT ee The greatest inven- “ ed tion in time and labor ner The turret revolves. Any desired tool instantly ruse. A postal will bring full particulars. Send for it NOW Tessmer Machine & Tool Co., .if2%3*$?. Detroit, Michigan BeYourOwnBroadcaster WITH AMAZING NEW MICROPHONE ONLY $1.00 COMPLETE ehir Thousands of laughs and ‘ 99 tricks are hidden in this No “Extras clever Microphone. You can actually do your own broad- casting with this remarkable ‘ to Buy phone s to wenn all invention and fool all your SP RY ee friends. Instructions tell you eter how you can hook this instru- t } “ay ment up with your own loud speaker. Connections can easily be concealed. No erterence hme nt er tire trument. MONEY BACK GUARANTEE i only $1.00 with order blank, and add 10c in stamps or for n st. Keep ten days. If not actually tickled return it to us in good condition and your money e refunded Order NOW! R. B. SPECIALTY CO. 318 Sycamore St., Cincinnati, O. with your regular radio reception. This great for parties, your friends will it. Full instructions accompany IS of ] Llling ¢ results ekKled Dept. E-306 ADVERTISING SECTION | | | | POPULAR MECHANICS ADVERTISING SECTION YOU CAN DO IT! Half an hour shows you how. practice makes you an expert. good to be true, but is. No school—no tuition. One week's Sounds too Here are the facts. There’s a big demand for the work Clarke FlorKraftsmen are doing! The demand for fine smooth floors grows greatet every day. Millions are spent every year sanding old and new floors—in homes—in office buildings. $25.00 to $75.00 per day can be yours. And here’s the point. No one can do this work so easily so beautifully as the Clarke FlorKraftsmen. Your ambition to succeed, to have the things you want, the extra savings—the ex tra luxuries, can all be yours. There’s no mystery no magic about it. The facts we will send you show the way. It’s a sure big pay proposition Over a thousand Popular M« chanics readers who have seen our announcement in the last six months, are now making from two to five times their previous earnings. Costs noth ing to get the facts. Be sure to send the coupon NOW CLARKE SANDING MACHINE CO. Dept. T-12 3831 Cortland Street CHICAGO, ILL. Originators and for It years Manufacturers of Portable Sanding Machines. answers all calls CLARKE SANDING MACHINE CoO., Ca. VACUUM. PORTABLE SANOER Dept. T-12, 3831 Cortland St., Chicago, Ill. Please send me the facts about Clarke FlorKraftsman- ship. No obligation to me. A Or anne mane ¢ Name State. PIrITTiiitititiitit iii iii iii TTT LILI - Q Zz

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178 POPULAR MECHANICS ADVERTISING SECTION 21 Jewel BURLINGTON Write! —while this special offer lasts!—for the NEW Burlington Book, showing in colors the NEW 71 Jewel Burlington in all the latest designs — including the New Burlington Bulldog, the New Lady Burlington, new strap watches—in fact, a watch for everyone! Always a masterpiece, the New Burlington is now better than ever! 21 Ruby and Sapphire jewels; adjusted to the Second, to Temperature, to Isochronism, to Positions; 25 Year Gold Strata Case. 00 Down -30 Days Mal Yes! Carry this watch masterpiece for 30 days, with no obligation to buy unless delighted! Only $1.00 down, the balance in small easy monthly payments at our rock- bottom, direct-to-you price, saving you from 25% to 40%l But don’t delay! Take advantage of this offer NOW! While this Special Write! ! Offer Lasts! Find out about this special offer of 30 Days Trial ant $3.50 a month— made for a limited time only. And our FREE New Burlington Book. It shows how to ju ~ the real value of a watch and avoid purchasing watches that are overpriced. Just fill out the coupon and mail ic TODAY. Burlington Watch Co., Dept. 13-59 19th St. and Marshall Blvd., Chicago Canadian Address: 118 Princess St., Winnipeg, Man. Please send me (without obligation and prepaid) your new free book on watches, also your special $1.00 down, 30 day trial offer on the New Burlington Watch. Print name and address piainly, PATENTED) SHOWS BIG SIZE MOVING PICTURES Safefor $4295 Non-Inflammable Safety Film: the Home 54 FT. FILM GIVEN Jeieaag The following ree ire only a few in the filz and are genuine, gee! by the actors thems film is the same size as used in Charlie Chaplin in * ‘Making | Pies” Wm.S. Hartin* “Western Train Robber, Tom Mix in “The Battle on Horseback Also Slides, Drawing Slides. 1 Tickets and Prov Machine ING COUPONS in and 54 Every live boy sh« Ft. Film at home or club a } Moviegrapt hat Com- pictures the same plete for movies with $6.95 French lenses structed along prof lines The electr ( cluded for conne lamp socket bulb will fit Ca had for an Dr teries fo witl ~ > trici xf ing of ord cog parts.,\ the comedy film in the country f machines Size of machine a r Weight « a? te 6 rive goo g iré money back. Reference American 1 Boston, Mass Order your machine today tn time for Ci and 84 ft. Fim LIBBEY & NICHOI S $6.95 complete, prepaid in U P.O. Box 52, E. Milton, Ma: Set Builders-Dealers! Save Money! Send for the most complete book of nationall ' Parts, Kits, Cabinets, Consoles, Speakers, Power Unit Sets, etc. All at lowest wholesale prices. Quick s« on all your needs. Write now, it is FREE SETBUILDERS SUPPLY CO. 124 Romberg Bidg. Madison and Market Sts. CHICAGO, ILI Is Your Car...... Genuine KEYSTONE MOVIEGRAPH A Gas Eater New Invention Increases; Mileage on Auto Gas && Eater from 131, to 34.6 Miles on a Gallon An astonishing new device has been per- fected that is amazing car owners every- where Goerzen reports increase 13% to 34.6 miles on his Dodge sands have been installed and users report 30-40 and more miles on a gallon of gas. In i ee addition power is increased, instant start- ing and dashy pick-up is noticed one car- rset Dé | bon formation disappears I ar RSS | owner in the country needs this aew in ention cos it pays for itself in a few days’ time, yet it will save hu dollars for its owners in gasoline $100 a Week Tervitory Open $5.00 an he tremendous lo eight. ideal ~ FREE for their =i rkerst mG ck ne arvel Whirlw your loca 5 Sopra sto owner w i i partiouiase | Whirlwind Mfc. Co., oe eons Ce 999 378-E Third S MILWAUKEE, W NMWMNNTT AD UWMOKVWVaANeC ATV doDTICmIwwoe CLreorTmown

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APH 2S y Films FREE 4 th °° ybbery”’ back” I } pen suv POPULAR MECHANICS ADVERTISING SECTION 179 A $100 SHIP MODEL FOR #428 You can put a beautiful Ship Model together in a few hours of pleasant pastime Let the World’s Largest Builders of Ship Models supply you with all the necessary parts cut to fit and ready to put together for the models, Santa Maria, Mayflower, or LaPinta. You need not know anything about ship building to assemble one of these models If you have hever seen a ship model you can put one of these models together in a few hours by following our diagram and instruction sheets which explain and show you exactly what to do with each part All you net 1 is a small tack Will You Pay* 00° 3 Year Jorg 915, 09 BUSINESS “From Nothing to $15,000 @ Year! og No dream—but an_actual fact! L. E. Berry, Barnes- ville, O writes —‘* Have builta business upfrom noth- ing to $15,000.00 a year. I , owe my success to your Hay- 1 1 Haywood proved plan has e OV er “16 000° men _independent Free c. W © for free books "Steps to § 88 . waYwooo TIRE 2330-T Ave EQUIPMENT co. Home Electric % Hair Clipper , ¢ ‘ more a year—easily. Fugo—the in- | on direct and alte ke $5000 or g ie stantaneous automatic fire extinguisher- needed and I T. aaae My) wanted in every home, store, theatre, garage, shop, | Thousands in 1 Rigidly g Socket sch« automobile, \ he st fi ytecti vail- / ahi + aL Within pn ane ry t hre pr ctioD avail TEN Days’ FREE TRIAL ing it nd nor Re charged tn astfy —pay postm $8. 75. ke nd t Amazing 30-second demonstration clinches — ch one acld , “ 4 sella oth Territ ee goin fast Write at ence fer wonderful State whether 110, 220 or 32 v ; STene & 1. pecition “4 Py will make you big meney. THE NATIONAL FORMETAL CO. . 6535 Metta Ave., N. E. Cleveland, Ohio Dealers and Ressaepaiiakinnn Wanted Belle City Appliance Co., 1022 12th St., Racine, Wis. Fits 1 Qt. Size $5.00 2 Qt. Size $7.50 Hf your hardwat trical dealer can’t supply you, write hammer to tap the parts in place The diagram ma ikin g it impossible for you to go wr ng. ‘These mod when mpleted are exact in ever i the famous old sh y represent, and when I eted ll add a dis- ne o your home. We also have parts for the model S for the Con stitution at $6.98; all other models listed at $4.98 ‘ eac! PCSSSSSSSSSS TESST ESSE S SHEETS ESTEE HSER REECE e Se SANTA MARIA $ MINIATURE SHIP MODELS, INC., Dept. PP-2 : viens ° o _ —_ s 3818-24 Baring Street, Philadelphia, Pa. . 25 High; od W ide; 27 Long . Please send me the « plete parts cut to fit and ready : . + ’ + for ‘ XT ir beautif tea ane trated booklet contai phot ind = to put together the . & Iwill pay post | t t : Hy Please print name and address “plainty to aveid Gehan. Hy . . dels, | an iniature ip odels, Inc.,: °°" Dept. PP-2, 3818 BARING STREET s ; . ‘ t s i PHILADELPHIA, PA. pe See = 2° eoceooocccccscocsescsscesse : _—— Wee = Sample $1.18 3 for $3.00 Postpaid A Genuine $2 Knife for $1.18 Postpaid Handy shaped Blade makes this knife best for mechanics, sports- ; men and farmers; light but strong; re-sharpened easily. Stag = handle. German silver finish; blades file tested, hand sorged from razor steel and warranted. ‘HOW TO USE A RAZOR.” a we pi oo birect at Factory Prices Hand Forged Razor Steel Blades Send for our 100-page FREF Listand Maher & Grosh Co. 106 A St., Toledo, Ohio POPULAR MECHANICS ADVERTICING cretTraw ala

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180 POPULAR MECHANICS ADVERTISING SECTION —FREE— S&B 8" Combination Saw | Aone Back Cuarante mwas | 18 Tools In One} 4%’ Band Saw Sent toy You on 15 days approval 12” Band Saw Positively a sensation and at this LOW PRICE you can NOW do the 1001 things you wanted quick and eusy. This 12° BAND SAW * has a tilting table, with Miter and sturdily built. Ideal for the shop or home. S&B Scroll Saw Here is the outfit of practi- F.0 CHIC AGO cal usefulness. Will cut wood and light metal true to : marks. Table top tilts to 45degrees, mak- $3 500 F.0.B.Chicag ing it convenient and easy to cut at proper without Mot ingle Thousands of jobs can NOW be done by any man or boy with the accuracy Scroll Saw . f a real mechani This S&B Belt Tightener WONDI R SCROL L SAW is free : 1 H. P. Motor-40°-1002% overload Double Shaft Extension | from vibration. Detights 18 Tools in One—Greatest Machine You Ever Saw Boy THE S&B 8-in. COMBINATION SAW (18 toolsin one) ts the ideal machine for the shop, factory or the home will rip, cross cut, bevel, miter, mortise, groove, drill, tenon, grind, rabbet, buff and polish Motor is mounted on a base that is a part of the machine proper. Run from any light socket, also provides power for othe r purposes when the saw jis not in use Complete with attact ents and price includes 1 H. P. Motor, 60-cycle, 110-Volt A. ¢ Price $35.00 F. O. B. Chicago Shipping Weight 100 Ibs 00 (Planer attachment to fit on table top will smooth pieces up to 2 in. wide, $10 extra.) F . O. B. SCOTT-BANSBACH MACHINERY CO, Write for Complete CHICAGO Illustrated Folder— 1,H.P. A. ¢ 130 So. Clinton St., Dept. 97, CHICAGO, ILL. Dealers Wanted. Motor $15 extra AWhole Winters 5s Big Profit: COLUMBIA RECORDS | For All Make Autos. me Agencies Wanted. 9 The world famous electric recorded records, A iy 1 SENT "TO. IN TRODUCE eas ae an our Te / MOISTURE does it. Increases mileage 1/4 to 1/2. Faster getaway Tunes will fill your winter evenings with real d More power. Higher top speed. Eliminates hard carbon from —_ entertainment. CRI CHLOW, Inventor, SA- 805, WHEATON, ILL., U.S Amazing New _ Vapor as Saver 15290—Two Little Girls in Blae The Fatal Rose of Red - - Sung by Leo tei 152 88—Home Sweet Home Where the River Shannon Flows .75 Sung by McMichen’s Melody Men. 135201—A Corn Licker Sull in Georgia. Parts 1 and 2 Sung Le. Mc Michen, Puckett, Tanner, Make big earnings, tah _- rs for made-to-i1n V neasure suits at less T eiraenes ar prices. Giant ‘ cago wholesale house makes w greatest values at $23.50 and $29.50 y profit $4 and $5 per sale in advance—we deli’ Norris, Nichola and Brown. collect. No exnerience needed, work full or p: art x Send no deposit. Write for det 15140—A Fiddiers® Convention a G a FREE OUTFIT our unique money-making plan prewee by McMichen, Tanner, Puckett, ing like it ever before offered. Act at once. a5218—L ‘te Marian P Eaune. GENERAL TAILORING CO., °&%"-529 South Franklin St., Chica here Is My Mama? - 75 Sung by Al Craver and Charlie Weils. 1507 4—Bully of the Town. Pass Around the Bottle e .75 Gid Tanner and His Skillet Lickers Wtth Riley Puckett. 15189—Wednesday Night Waltz. Good Night Waltz - - -75 Leake County Revelers. SEND NO MONEY—Unless you wish. Records will be shipped C. O. D., 75c each or allfor $5.25 plus C. O. D. charges. Send only 75c¢ each if you send cash. No extra charge on cash orders—postage paid. GUARANTEE—If not entirely satisfied send records beck to us and ge tyour money back, including postage. H Ou R H WACLOCK Profitable spare time work for { Turn idle hours into welcome d by building clocks from our inst! tions. We furnish plans, instructi blue prints, works, dials, and materials at surprising low pricé You make a big profit building art clocks for your friends. Banjo Clocks, Mantel Clocks, works as | as $1.65. Beautiful Grandfather Clo« with chimes. All styles, all prices. ASK FOR OUR ATTRACTIVE FREI BLUEPRINT PLAN AND CATALOG AMERICAN CHIME CLOCK COMPAN 1670V Ruffner Street, Philadelphia ST. Lou IS MU sic co., St Louie, Mo., Dept 829. Send records | have marked x Send them C. O. D., or | am enclosing money order (slate which you prefer). Name Town State Street or R t I ) TRY? POPULAR MECHANICS ADVERTISING SECTION

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a So xtra POPULAR MECHANICS ADVERTISING SECTION 181 is Ic ‘loc! AWN hia You Can Easily EARN:150 45/300 Di Profits COSTS Only #16 MONTHLY Paysforitself—No Expenseto You ; Barnum cleared $350 the first Bigger Profits month Wilson cut his - tr bills in two and doubled his for You business. Start a money-mal vour own—Make Battery Charging tl Maker in your shop Tou can do it v IB § Auto and Radio }"“")° vith I Battery Business ara ndeceedagtoner cag Good Now far better charge in one third the time required b ma hall ae muon for carremt us old slow sive bulbs to burn out Start 30 DAYS’ TRIAL AT OUR RISK Pays for Itself and a Profit Besides | tterv Service Silent Twin ““~ Compressor t m they buy Bring ‘mh . » witl Air Service Pees ther fellow’s HB Silent Ser e will do it Only $11 mnths Increased business for it. Check No. 2 in cou- Electric Test Bench rhe best paying Auto Electrical work now av uilab le to small shops with this new low-priced HB Test Bench—-that does iny benches costing $100 to $150 more Costs only a small part of the extra profit brings $20 monthly Check 3 slow for particulars. »> and sell ‘em for $100 more Hit} Paint Spray is going into f Garage Does the work of five ter Big profits in contracting erior decorating—or production rience necessary. Check No m this profit naker HB Equipment built in HB Factories does more and costs less Any item can be had on 30 Days’ Trial and easy monthly terms It pays for itself with a handsome profit for you. a BROTHERS Successiul manulacturers ~sincel893~ BOX M128 TROY, OHIO Tear Off and Mail Today fobart Brothers, Box M128, Troy, Ohio. d A plete information on the items T've checked trial offer easy payment terms—informatior iipment will increase my earnings HB S Hour Battery Charger ) HIB Air Service No. 3 ) HB Test Bench No. 4 ) HB Paint Spray. V like Address better work and makes more tests than | 150,000 MILES IN 7 YEARS —never without a 1-lb. can of SMOOTH-ON No. 1 ONTINUOUS TOURIST” CRAW- FORD has driven this flivver since 1921—in Siberia, China, Indo-China, India, Africa and Australia—and has found Smooth-On No. 1 indispensable. In rat- tling over ice in Siberia, and elsewhere on rough stretches without 10ads, Smooth-On No. 1 was the only thing that would keep the nuts and grease cups tight, and stop radiator leaks. In Indo-China, when the circulating pump broke, a Smooth-On repair got the car back to civilization. In Mr. Crawford’s case, not one extra pound of weight can be carried, but he would never be without Smooth-On. Get Smooth-On No. 1 in 7-oz., 1-Ib. or 5-Ib tins at any hardware store or if necessary direct from us HIS booklet tells how to stop not only water leaks in radiators, cracked water jackets, and at loose hose con nections, but also how to stop gas leaks from the tank, gaso line lines and exhaust system, and oil leaks at gaskets and at cracks in crank or gear case. It also tells how to make he adlight posts, nuts, hub caps and bolts and grease cups stay tight, and shows dozens of simple money saving Smooth-On repair jobs Sent free if you return the coupon Write for FREE BOOK SMOOTH-ON MFG. CO., Dept. 37, 574 Communipaw Ave., Jersey City, N. J Please send the free Smooth-On Repair Book Name.. Address. . POPULAR MECHANICS ADVERTISING SECTION 183

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IS2 POPULAR MECHANICS ADVERTISING SECTION A Brand NEW INVENTION! OPENS NEW FIELD FOR AGENTS PAYS $90 TO $125 WEEKLY BIG PROFITS ON EVERY PHONE AND ELECTRIC IRON Se il only de in existence that prevents kinking, snarling and Nothing in World Like NEVERKNOT men bu ing 1 to and business al “Reserve Ba ink General Elec ec Mellon National Bank and ! ther big cor tnies, tself out the way, et eve ich of its se “? feet is avail- able f use A new k of switeh plug prevents scorching and saves electric bills rHIS SET IS A “GOLD MINI FOR HOUSE-TO-HOUSI WORKERS FOR YOt HAV! Spiny agg byphnig dies buy instantly a see it saves its own cost ide cnenetese Neverknot Switch Plug Cord Set and a Neverknot for vour tele phone cord are given to you free at once if you work for us. Agent without experience g $90 to £125 weekly with these new i camerene I » don't de Send now for une srepeatt on Neverknot Ca, Dept. 12-V, 4503 Ravenswood, Chicago, Ill. You Can Play q ParAmericai, Clarinet Everybody likes a Clarinet, the sweetest singer of them all. Clarinet players are in constant demand, at big salaries. The Pan- American Clarinet isa beautiful solo in- strument for home, church, school, or private entertainment.Famous band leaders learned the Clarinet first! You can! They are so easy to blow -—and to learn io play. Remarkably LOW-PRICED Pan-American Clarinets are called “the greatest valueforthe money on the market’’ by America’s foremost band and orchestra leaders. Tested and found su- perior by the leading artists. Send coupon below today for our remarkably low price offer.Easy Payment Plan—and catalog of complete line of Pan-Ameri- can Band and Orchestra in- struments. SEND NO MONEY MAIL COUPON ese eee ee i The Pan-American Band Instrument & Case Co., Elkhart, Indiana Jept. G-23 YES—S« on i me complete information on PAN-AMERICAN other band instruments would lik arn to play irinets anc to k Address My local Mus “J would not part with it for*10,000” So writes an enthusiastic, grateful cus- tomer. In like manner testify over 100,000 people who have worn it. The Natural Body Brace Comfortable and Easy to Wear Overcomes Weakness and Organic Ailments of women and men. Develops erect, graceful figure, brings rest- ful relief, comfort, health and strength. Not Sold in Stores— Made to Measure=—Makes work easy and wa ing a pleasure; replaces and supports misplaced ternal organs; reduces enlarged abdomen; straight ens and strengthens the back; corrects stoopi: shoulders; develops lungs, chest and bust; relie backache, curvatures, nervousness, ruptures, stipation. Get Well—Stay Well Write today for ill trated booklet, me urement blank, etc., and read our very liberal propositi« HOWARD C. RASH, Pres., Natural Body Brace Co 123 Rash Building - - Photos SALINA. KANSAS Size 16x20 inches — bri e for fail figure or bust, ups landscapes, or pet animals enlargements of any pert or ‘ap picture. Safe return of x * riginal pl ote guaranteed ‘SEND NO MONEY ? et m pm sto or J and within | > sive pour te -autiful life-like | on ment siz ie 20 in. guaranteed fadeless, | Pay postman 98c plus postage or send $1 00 | with order and we pay postage i 4 ECI | With each enlargement we wi send FREE obey j “tinte ed minis thre | FREE OFFER \ reproduction o f pb gto out eg antage now of this amazin r photo today. UNITED PORTRAL id ‘COMPANY fi 1652 Ogden Ave. Dept.369 Chicago, tll. AGENTS! DEALERS! BIG MONEY IN RADIO Demonstrate Metrodynes at home. Big pro! its. Demonstrating set on 30 days’ free tri Write for money making proposition. METRO ELECTRIC CO 2161 N. California Ave. Dept. 23, Chicago, tI! ti) =i (FOR XMAS—BUY THIS ) *AIR-MAIL EXPRESS” “2 -_ Complete Construction Set NO, 211 (Ilhustrated)— Wing spread 33 in length over in. Made a record flight of } seconds, flying over & Body is balsa wood, lacquer finish: wings adjustable, when landing special snap Saates 1ers hold motor in ph ce finished propeller, detact abl ous Seeoncen Dea Is, 1 i gear, ete.. cut to shape wir covering dope—ever needed, packed in box with full instruc tions and peared Vv Price. $5.00. No. 211A—Beautifully finished, with silk wing ‘ fly, $10.00, “SKY-HAWK” Model No. 20—Flies fast and far Made of balsa wood; ! lacquer finisna: yellow stabilizer green rudder Ly metalhanger: wirelanding gear, with celluloid wheels. Le 19 in Pa cked in box with flying instructions. Post; Other models from 25¢ o2 5. Clip this ade. and en- Y Se close 10c for big new » 4 WY catalog P. f ss} 4 As ) es G BROADFIELD fe ape AEROPLANE CO, _ es MODEL AIRPLANE Hempstead, N. Y. d —E Coan POPULAR MECHANICS ADVERTISING SECTION

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POPULAR MECHANICS ADVERTISING SECTION PUT THIS 350° HOME FREE For!l0 Days-No Deposit: i A New and Improved Workshop Here is a workshop built to a standard of perfection— accurate in operation -most durable in construction—easy to operate. It is absolutely depend- able and will withstand severe constant service. Try it for ten days at our expense and you will be convinced of its superiority. Suitable for Carpenters, Home Workers, Pattern Makers, Etc. Furniture manufacturers use MAC —the Popular Mechanic Work- shop—for making furniture models. Manual Art Schools use it for instruction. Home workers use it for pleasure and profit. Carpenters use it for making repair parts, spindles, chair legs, cabinets. It is ideal for making all kinds of furniture. The Lowest Price for Sucha Sturdy, Complete Workshop MAC, THE PoPpuLAR MECHANIC, represents the utmost in value and dependability. Now you can have an accurate, practical workshop at a big saving. Once you use MAC you will be convinced of its superior qualities. That’s why we want you to fry it for 10 days at our expense. Modei 70— ar S fl = de = kee P it, agree to re! i F ; rour r send the coupo in ac radance ith your terms. ick Arbor and y u min » sen the — Flange, 6” ? Adare ms 6 lamp, Two urning oupon ou 1 1. | Tools and Socket Dealers: Write for our Proposition! My | enches Midland Appliance Corporation | City he 1s

Dept. R10

219 N. Michigan Ave... Chicago POPULAR MECHANICS ADVERTISING SECTION Way meme cme eee ee eee ee

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184 POPULAR MECHANICS

A Sensational Offer! Only $1.00 and you get the famous21-Jewel Studebaker Watch direct from factory. Bal- ance in easymonthly payments! Lowest prices ever named on similar quality. You save % to 50%. DOWN 21 JEWEL~Extra Thin The Insured Watch Ladies’ Bracelet Watches, Men’s Strap Watches. Diamonds and Jewelry also sold on easy payments. This company is directed by the Studebaker Family of South Bend, known throughout the world for three-quarters of a century of fair dealing. 100,000 satisfied customers. Send coupon at once for full articulars of our amazing offer. Studebaker 21- Lhe Watches have 8 adjustments—heat, cold, isochronism and 5 positions. An insurance policy is given free—insuring the watch for your lifetime! WRITE FOR FREE CATALOG! A copy of our beautiful, new, six- color cataiog will be sent Free to anyone sending the cou- pon below. Shows 80 magnificent, new Art Beauty cases and dials. Latest designs “ye gold, green al and white gold effects. Exquisite thin models. Masterpieces of the watchmaker’s craft. Special Offer: Watch Chain FREE To those who write at once for free Catalog we will in- clude particulars of our special offer of an exquisite Watch Chain free. This offer is for a limited time only. Send coupon st once—before it expires. Studebaker Watch Co. /, Directed by the Studebaker Family—three- Z 10 quarters of a century of fasr dealing ( WATCHES — DIAMONDS — JEWELRY Dept. No? South Bend, Ind. Canadian Address: Windsor, Ont

wee ee PCC SOC e TTT eet tt ttt) > * See eee eeeeerere |! SPECIAL OFFER COUPON ! i STUDEBAKER WATCH COMPANY ] Dept. N907 South Bend, Indiana I Please send me your free Catalog of Advance ] I Watch Styles and particulars of your $1 down offer ] I a Please send me Jewelry Catalog free. ] i i Name : eee BR Be Dic ossicccceccieanessnasinisoonseies - I Cites oF Past CGS. .cccccccccccecccccceccscescscceccoseces ] I ] 1 State ]

POPTIT AR MECHANICS ANVERTICING ADVERTISING SECTION

The New Victoreen

A super radio achievement embodying vital improvements which make it the most remarkable power supply on thi market. Makes any good set better—pro- duces marvelous tone quality. Uses the new U.X.250 Tube. Twovoltage regu lator tubes assure a constant voltage potential of 90 and 180 volts, thus making possible the use definite known values of “C”’ voltage As a re fluctuation in the output circuit cannot affect t first audio and thus cause distortion Four voltages are supplied—0-90 variable, and 450 volts constant potential. FREE BLUE PRINTS and full constructional data on the new Power Sup- ply, and the new Victoreen A. C. and D. C. Circuit are yours for the asking. Write for the ones yor want. 90, 180

GEO. W. WALKER CO. Merchandisers of Victoreen Radio Products 2825 Chester Ave., Cleveland, Ohio Victoreen | Quality Radio Parts |

be

‘awe ADDING PENCIL<* S INVENTION Adds-Caiculates. Absolutely accurate, Guaranteed s 7. Turn spare time int ust showing $ MONEY MAKER itto triends. Getenmploend Mharetere now $ aDD-0-GRAPH CO., Dept. 24, SALTILLO, miss. *

MASON, FENWICK & LAWRENCE. PATENT LAWYERS 600 F St., N. W., Washington, D. C. Send sketches.

Estb. over sixty years. Electrical and Chemical Inventions carefully handled. | Practice before the U. S. Courts and the Patent Offic Prompt and careful service | TRADE MARKS REGISTERED

THREAD CUTTING LATHE A REAL Lathe. 9° swing; 30° betwe centers. Speedy and accurate Spec attachments and tools available Write tod 12” Band Saw Circular Powerful, practical. Notatoy. Pr at Has tilting table Price $ and other 1 Bronze bearings. only 30 chine H 1516 F ood Axe Rossbacher Machine Co., ‘*"$S?eoo‘Suic CEROTION

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POPULAR MECHANICS ADVERTISING SECTION POPULAR MECHANICS ADVERTISING SECTION 187

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ING POPULAR MECHANICS ADVERTISING SECTION SILVER ACE Models fly CONVERTIBLE [ Monoplane - Biplane - Seaplane Soo feet! Biplane Seaplane _ : _ The perfect Xmas Gift The vast superiority of SILVER ACE MODELS is due to the fact that they, like Sold Ready-to-Fly, Partly As sembled or Knocked Down Spend your money wisely and buy aSILVER ACE from on of the hundreds of best stores which carry them. If your dealer . » . »] > >f the big planes today, represent a great advance in expert engineering. does not sell them, remit to u Their beauty will thrill you, and they have the design, power and with soc extra for shipping very light weight to outfly any scale model you ever owned. PRICES: “ o7= : “ } | cS » simple ict and amazingly strong . Yet § IL\ ER AC ES are simple to construct and " azingly str Specify Spirit of St. Louis or Cabin Ty for their feather weight. The 30-inch wing span monoplane weighs only : Ready-to-Fly Monoplang - $ 334 ounces. Its silk covered demountable wings, semiflexible propeller Partly Assembled and landing gear resist shock. Knocked Down : , ' Contest Kit You can build a cabin monoplane of the Ryan-Stinson-Fairchild uses Made of Wines type, or of the Spirit of St. Louis, as you prefer, with a day or two of Date of Pons fascinating work. Add an extra pair of wings or SILVER ACE pontoons Catalogue and you can still fly your model over snow and ice, for it is waterproof C. O. D. orders not accepted THE AERO MODEL COMPANY, 329 Plymouth Court, C Misael © A N A RIES °xno'surrics WOOD WORKING aranteed singing Canaries, Parrots and Fancy MACHINES ( “ lete stock of cages, s pore and remedies ‘ . shop wn te t ve for FREE instructi booklet and catalo Portable ee eet " = —- are CHICAGO BIRD & CAGE CO., 4225. State Street. Dept 192, Chicago, at. | FOR HIS CHRISTMAS Bartlett Compeued Lever Snips $2.70 to $9.50 sturdily built for accurate em™c ient work Ta them out on the job and eut labor ec H for fact . large | Heavy Equipment fy ee ae ea cient machines for quality-quintity product THE CRESCENT MACHINE CO., 93 Columbia St., LEETONIA Cuts Ps h “ i 8-in. for $4.00 n., $8.00 14 $9.50. ——_ FOLDER ON REQUEST Bartlett Mfg. Co., 420 E. Lafayette Ave., Detroit, Mich. WRIST ADDING MACHINE SS’ GARMING D\UNUSUAL Size of a Dollar, Han mn Watch F ‘ob, ete Capacit len r ene Push kevs th pencil. Agents sell hundreds per Make them for you day and make 50°‘ it sells to ever = ‘ . b. i riends. Cash u n body. Sample $1.00 prepaid to first fri nd — :s BIG PROF ITS. It’seasy tor aSAN' MAR LA. or MAY ELOWI del sailng ship toornar i etees Miens. thems of ate Corner Hull is completely assembled, Santa Maria ready torig and paint —all sails Size—26" x 12” x 26° shields and flags fully pictur« decorated in a autiful colors. Complete instructions and color —_ tur furnished to en ible y kt » finish Only one of its kind made: No « aye nt work necessary: Nothing to cut Everything complete and can be finishe in a few hours: Excellent pastir Plus a small parcel post charge. Send check or money order and mention ship desired. Satisfaction is guaranteed, Agents. 10days money back guarantes E. R. HANSON CO. REDSTONE, MONT. R. W. Helmer reports this from Minnesota on Trippe Auto Reflectors. Wonderful device 100% more light and no glare! Pocket big money waiting for you now. hirlwind seller, makes astounding demonstration—low cost ~agents cleaning up—300°% profit— big repeater—sells on sight. Over 300 sets sold inone town | of 2,000 people. GET YOUR FREE SAMPLE OFFER TODAY — Wire or write. AERIAL ELECTRIC CO " © FRS 1639 Mascher & Turner Sts. wos GUFT CRAFTERS rincscetenixrs

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POPULAR MECHANICS ADVERTISING SECTION 187

NS» = mat fe AH ina piace ie tas AOE { {! H ii DO} WAT | HHS [EXERC [ee Electric +i <= AY SSS et \< = Complete 4 Including Planer, Saw, Lathe and lectric Motor and Many Useful Attachments ry Vv u Ls i i _

F kind of Fast-Accurate-Complete rniicerking operation \ COMPLETE all-electric shop to use at home or in business. Costs a lot less than most other outfits. Fast and accurate for every kind of woodworking operation: Planing, sawing, turn- ing, drilling, grinding, sandins buffing, ete Saves time, does better and cleaner work, too. Amazing low price $89 ...- Easy Terms~— The Work: ce Wor xdworke r has pow- er, strength, and capacity to handle

The Planer any job quickly and economically and Circular mitering, tapering, rabbeting, bevel- Saw are ing, slotting, turning, cross-cutting, each coms: ripping Every unit works from Sinn atin motor—parts are sturdy and well P - fashioned. The WALLACE GUAR- and may be ANTEE assures replacement purchased of defective parts for one vear. separately at the cor- responding Become an expert woodworker make tables, chairs, stools, scre ens, : lamps, lattices, ences cabinets, low price of doll houses, book cases, chests $25.00 each. make woodworking vour hobby

and turn it to profit, as hundreds do.

Terms are all in your favor. Small down payment brings the Workace COMPLETE. Monthly payments so small you'll mever miss the money Many pay for their Workace out of profits it rnakes socanvyvou Send the coupon Dow and we'll see that you get full details immediately. FPSSST SSS SS TEV ESTES ESTEE SEES EEE ESTEE SESE e EEE EE Ee

: : « J.D. Watlece & Co 4 = Adams Street and California Ave 4 § Chicago, Il. . . : s I t W ka } etri W lw i . ee it I want to k % 4 . " terms igt awa 4 : 5 : Workace 14” Band Saw ® Name : complete with guards. Add $75 Tene R : - a s . $19 for motor and belt H 4 H Am intere i et ‘ s 4 .

DMYMITYT AD Borrmrawyrera a Krwrre reser ar ee a

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185 POPULAR MECHANICS ADVERTISING SECTION ‘What would I do if I lost my job?” SuUPrpose your employer notified you tomorrow that he didn't need you any longer? Have you any idea where you could get another position? Don't have this spectre of unemployment hanging over your head forever. Train yourself to do some one thing so well that your services will be in demand. Employers don't discharge such men. They promote them! Decide today that you are going to get the specialized training you must have if you are ever going to get and keep—a real job at a real salary. It is easy if you really try. Right at home, in the odds and ends of spare time that now go to waste, you can prepare for the position you want in the work you like best. For the International Correspon- dence Schools will train you just as they are training thou- sands of other men no matter where you live no matter what your circumstances or your needs. Mail the Coupon for Free Booklet TT ERRATIONAS. CORRESPONDENCE SCHOOLS ‘The Universal Ur ty”? Box 5581-F, Scranton, Penna. W it t or obligation, ple I 1 copy of your book- “Who Wins and Why,’’ and full particulars It t subject which 1 have marked X ‘ BUSINESS TRAINING COURSES BR iness Management Busi Industrial Management s ard Le ir 1 Perse at Saami Stenography and 1 rraffic Mar igement } t ri ilesmanship Illustrating rtising Lumber Dealer TECHNICAL AND INDUSTRIAL COURSES Textile Overseer or Supt. Cotton Manuf Ends continuous wiping. RUBBER takes off dirt, FELT puts on chemical that keeps vision area clear for hours, in rain, fog, mist or snow. CHRISTEN’S SAFETY WINDSHIELD BT ADE Fits any style windshield wiper —just take out old blade—insert Christen blade. Once “broken in"=—after two or three hard rains—a few strokesclear giass—and it stays clear. Guaranteed for 1 year. Protects glass from ugly scratches—addstodriv- ing safety and pleasure. Over 1 }4 million in use, Standard 714-in. size. Special 9 in. size, 60c. Wherever auto 3 accessories are sold. V.H. CHRISTEN MFG. CO. 821 Orleans St., Detroit, Mich, _ 2 ASHER, “Washes-Cleans-Dries-Polishes in ONE Quick Operation. Amazing new invention com- pletely re tionizes window washing. Carries its own water supply * Rt minates all tl and unpleasantnes Five times as fast as old methods! Ne pall. No brush. No sponge. chamols. Your hands never touch water “with the NEW AUTOMATIC. Can be used with or without pole. Every housewife, auto-owner, store keeper and fa tory owner a live prospect. Sensational den —_ on nee at sight. Big repeat busi- “MAKE $90 To $150 A WEEK! Agents coin tremendous profits. Going like wild- fire. Sells for only $1.95. Liberal profits for agents. $10 to $25 a day easy; $200 to $300 a week possible. WRITE FOR OUR FREE SAMPLE OFFER You risk nothing. Don't delay. Write for money making propositi today NATIONAL INDUSTRIES, Wrigley Bidg., Dept. 1512, CHICAGO LATEST CATALOG OF RADIO: NEWEST SETS AND KITS ‘ newest standard parts, sets, kits at bie A, BARAWIK COMPANY iiize, const ste. Play Tune in 10 Minutes mese New Amazing INSTRUMENTS New Kind of E-Z Playing Tenor Banjo, Ukulele, Mandolin and Guitar equipped with exclusive patented invention that seummentent to play Patent Pending 10 DAY TRIAL = = No eid ige of musio > quired o long monthe of tire- some pia: ice. No expensive les ‘ay by numbers at first— learn to play by note automat- ically w nite playing tunes. Popularity! Big Money Astonish your fr fends, | center of attraction at all parties. Produce rich harmony, ayncopated s. Loads of fun! Money-making chances. 10 DAY TRIAL—EASY TERMS ("= "~ on Special 10-Day Free Trial Offer. Play tunes at once or trial costs you nothing. If eatished, pay at rate of few cents a day. Send for of E-Z Playing Instrumente. Contains Free Catalog*:: »ig money saving values. (If you have strument, you can secure E-Z Play- ing Method separately.) You risk nothing. No obligation. Bend todays |

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POPULAR MECHANICS ADVERTISING SECTION 189 a DIKE ARO gs ES FS eH ses ra io ee AN Pe Di Pes EGE | Now ~ AVOID STATIC | Enjoy Real REC Pleasure RQ Ss SSS > Bena . up with shrieks, howls, fading and other annoyances. Y Endorsed by Experts don’t have to! Get reception—music, singing, speaking B-AERIAL has been sub- as el ar and pure as if the artists were in the next ted to the severest tests roon Get increased volume and better long dist e nd has convinced many reception. Get sweeter tone and finer selectivit wit it id arkable pe —s ont Rae listortion Use the whole earth as a static and n e hiter Secaee peremenes. Be with SUD-ARMIAL! will tell you that Sl iB AERIAL is the reliable sys |1 Flow This New Ground Aerial Works

t rence mproving epg oshanaaviner SUB-AERIAL takes the radio waves from the gr l, where ensitivity and distance get they are filtered practically static-free, delivering to \ ng abilit faradio. Read radio all the no ites in their true, natural for Interfere the r endorsements ——— from other radios or stations is either eliminated or greatly te \ en 8 ee “vs ers reduced Cut through and enjoy remarkable select Trial of = B-AE ~ po = Your radio is more sens tive in picking up distant signals May 8th. 1928 are free from lightning risk and have a permanent gr ind I am very glad to state that guaranteed for 25 years And the “ ne On ter testing many Aerials in afford to be without this great new invent Laboratory I find your ib-Aerial is the best for clarity of tone and elimination Low Original neared U pkeep C ost f static, also for aa vol- |} SUB-AER IAL sdenien tity tiie = Your Sub-Aerial will fill a less than mal Its first cost is the only ne SI iy. mong the AERIAL is nant inent. No trouble—no hard work, or risking your neck on roofs 7 TRY IT FREE i Can be installed in a few minutes ave been We know so well the surprising results you'll I installed get that we'll let you put in a SUI hat my sect AERIAL entirely at our risk. You be the popes judge. Don't take down your overhead ad never aerial. Pick a night when there is absolute alotofstatic. If Sub-Aerial doesn't sell itself to you right then on per- formance— you needn't pay usa cent owt Pha Fo teno, Okla on SUB-AERIA Ye ™* “a f be surprised Do it NO Ww Underground Aerial Systems St. Clair Bldg., Dept. 805-T. S. Cor. St. Clair & Erie Sts., Chicago, Ill. Replace Your Old Noisy Aerial with SUBAERIAL

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190 POPULAR MECHANICS ADVERTISING SECTION - TTL? a ETHYL Knocks out that “ knock’’ north . east - south - west HETHER you live in Canada or Florida, Maine or Cali- fornia —or anywhere in between — you will find Ethyl pumps, at which a superior motor fuel suitable to your climatic con- ditions is on sale. Ethyl Gasoline knocks out that “knock.” Makes carbon an asset. Increases the performance ot any type of car — whether of low or of high compression. Try Ethyl in your car today. ETHYL GASOLINE CORPORATION 25 Broadway, N.Y. 56 Church St., Toronto, Can. 36, Queen Anne’s Gate, London, Eng.

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POPULAR MECHANICS ADVERTISING SECTION 191 Superphonic 7 is a world beater! An excep- tionally high grade receiver that is amazing the Radio World. Latest. 7 tube tuned radio frequency circuit, using 4 radio frequency ampli- fiers, detector and 2 stages of audio. Power tube ean be used in last audio stage. Extremely selec- tive,marvelous’sensitivity. Single drum dial contr Straight line wave lengt iensers permit accurate, equally spaced tuning over € re wave band All sx ckets spring ishioned to eliminate microphonic noises. Bakelite subpanel [8 14 ir Clear and realistic exceptionally beautiful, walnut x 1Sin. Complete chassis. No extra parts to buy All parts mounted ready to wire No special tools needed. All hook-up wire and colored battery cable included. Value $60.00; our price $16.95. SIMPLE WIRING DIRECTIONS Very easy to wire this set with the instruction we Just connect a few wires. All you have to do is to follow numbers. Simple as adding 2 and 2. Can be wired ina few minutes by anyone. No radio knowledge needed. Make money by wiring these sets in your spare time and s¢ ng them to your friends COMPLETELY WIRED deep} insures minimum dielectric losses reception guaranteed Ar nish, metal front panel 7 ir furnisl If you would rather receive Superphonic 7 completely wired we will be glad to have it wired for you at an additional harge of only $2.00. Please indicate on your order whether or not you want Superphonic 7 wired RADIO EQUIPMENT COMPANY Dept. 10-M, 551 S. Weils St., Chicago, Il. te Mh SINGLE DIAL TESTED AND APPROVED } awe mark p Severe laboratory tests ive prc ithere irka ol this set. Owners everywhere are s¢ ung u ete pr ing its wonderful receptive qualitic EF. Richmond, Detr Michigan, write rried out my Superphor fir w weak | W irprised to 5 ot long t i re 1. lex ae i I ver A fr ir 4 I | another outfit f B.J.G I ( rado, say Wired se t ‘ ( t tr Plen ‘ 1 I i M.A N. ¥ nds telegrar | , Supery ‘ M. Madse ( I D 4 “ t rad | ‘ i \ i 1 it r r ( Dry ( \“ up got 12 out of towr tation ver cle SEND NO MONEY Fill in the coupon and mail it today Wwe o ediately Uponarr il pay only $l¢ l or $18.95 (completely wired) plus a small de irge. | eign countries s« 1819.50 (ready t wire rs wired) with order. We pay shipping charges RADIO EQUIPMENT CO., 551 S. Wells St... Dept. 10-M, Chicago, I. cen

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POPULAR MECHANICS ADVERTISING SECTION

S$ FELLOWS = Learn ELECTRICITY. | Fre may Ant a a 200, 00 a, 4 | Uneek . eg Gy oe | ; bid taal és i ee H.C. LEWIs— | President |

a Mr. H C. Lewis, Pres. : COYNE CLECTRICAL SCHOOL, Dept. 98-75 + ey Pauliaa Street, Cateage, Ill. r Mr. Le a - y-- me an z Be |

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PARENTS! What greater gift can you confer on your chil- dren this year than life- long fun and entertain- ment? Love of music means love of home, an appre- ciation of the finer things in life. Here is a chance to give your boy or girl that love without the te- dious practice that most instruments require. The Xylorimbaiseasyto play. No teacher is needed Practice is actually a joy. Remember, the Xylor- imba is the guaranteed product of a company established nearly half a century ago—a company that stands back of every promise it makes. Send for BIG FREE Book! HINK of the best Christmas gift you have ever received. Multiply the pleasure it gave you by ten, and still you have only an idea of the joy you can give yourself this Christmas if you act at once! Start to Play the Very First Day! Haven’t you, like millions of others, envied the fellows who “bring down the house” with snappy xylophone or xylorimba numbers? Haven't you longed to create your own music, to be looked up to wherever you go, to be able to make real money in sparetime? If you have, this ad spells O-p-p-o-r-t-u-n-i-t-y. The xylor- imba—wonderfulforhome,indemand at dances and gatherings— is nevertheless the easiest of all instruments to play. In fact, on the very day you get yours you play simple melodies, even if you can’t read a note of music right now. In afew weeks you astonish your friends and fam- ily. All your life you have the joy that come. to those who can entertain. . ty Plays 20 Minutes; Gets $20! Ralph Smith, Chicago, pl: iyed twenty minutes at wedding; his “‘pay’’ was $20. Altho only 12 Turk McBee, Jr., plays big-time vaudeville ex clusively. Harry Breu- er, New York, has

made thousands of friends thru his xylophone selections on the radio, L. E. Hallman, Reading, Pa., writes: **Made$300in 5 weeks—sparetime.” And now !}.C. Deagan, Inc., (world’s largest manutacturer of xylophonic instruments) has made it so easy to own a xylorimba that noth- ing stands in your way. Sizes and styles to fit every age and pocketbook. A five-day free trial that eliminates ris Free, easy lessons that make teacher unnecessary—and, best of all, sucheasy paymentsthat theyare hardlv noticed. Will You Investigate? Everyone wantsto be popular. Everyone wants to make extra money. Everyone wants to be center of attraction at gatherings. But these ad-

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vantages don’t come by the mselves. Oppor tunities must beseized. This is youroppor- 4s tunity will you pass it up without in- o vestigation? The accompanying cou- .@ pon will bring our big FREE book o to your door. It tells all about .@ the Deagan line, the free trial, ; Cw the easy payments. Remem- .¢ se ber, no cost or obligation! Pe Simply fill in and mail Pd e Ord the upon but do it \ > .y c before it slips your ¢ =~ - \ nit q " la vy is os mind. Toc , ore cc. as good ee le 4+ a > —_— as any Do it o & < oe NOW! oo Pa » dll ie oa ~) ‘ x¢

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cAnd Now A MACHINE To Make Shaving 5027 Easier’ and 100% Cheaper! Invention Arouses a Whirlwind of National Amazing Records of Unbelievably KEEN, Cool Special Introductory Offer in Force Right Now! Unique Interest! . Ac hie ves Shaves . MAKES ONE BLADE LAST 365 DAYS! HIS is the age of amazing scientific discoveries. And now comes the most surprising invention of all; a machine that absolutely revolutionizes shaving! Just think of a device that can take any Works on all brands of blades except Dur- ham. Reproduces the magic diagonal stropping-stroke of the master barber. Re- verses blade automatically, first one side and then the other. Starts with strong pressure and finishes light. Nickel jig flies Agents! 930 a Day ordinary razor blade on the market and multiply its sharpness 50% to 100% in exactly 11 seconds! And just imagine what a slick, painless shave you can get when your blade is just about twice as keen as any you have ever tried before! No More Blades to Buy But that isn’t all. KRISS-KROSS not only strops blades to unbelievable sharp ress—but it makes them last almost indefin‘tely! Day after day week after week—you can keep using the same old blade and still get smoother, better shaves than you now get from a blade right out of a fresh package! Any number up to notify you when blade is ready with the keenest cutting edge steel can take! Generous Introductory Offer KRISS-KROSS is never sold in stores but only through authorized representa- tives in each locality. Right now, we are making a generous offer and are giving a new kind of 3-way, adjustable razor FREE to introduce KRISS-KROSS. Use the coupon below to get details of this un- usual invention and offer. See for your- self how ingenious KRISS-KROSS is and what undreamed of shaving comfort it holds in store for you. No obligation. Clip the coupon now. Mail it to-day! KRISS-KROSS is an astor ishing money maker ar excellent protits t men who are willing brings to acta our representatives tn their home territories. Many earr $30—S60 a day and other are making $5000 and $75M a year clear profit. Spare time agents often take in S12 an evening and up t $200 a month. We give you an extremely generous prop osition and show you just how to get started the easiest way. Write for information and see just exactly what we offer. It will pay you to in Check bor below vestigate. line of mail it coupon ’ to-day: of cases are on record where one blade has lasted ~ver a year and is still going strong. And M. T. Main of Kenosha, Wisconsin, has used one single blade for more than {ve colid years cf the coolest shaves he ever got in his life! ty. oie ae 7“ KRISS KROSS RHODES MFG. CO., Dept. W373 ST ROPPER 1418 Pendleton Ave. ST. LOUIS, MO. =—| ee ee ee ee ee ee ee ee All Rejuvenates ] 1 vi , J Rhodes Mfe. Co., Dept. W-378, ‘ , 4 yr ac Vs > A t. Louis, o. NMlakes o Wonderful Xmas Gift! | g {Without obtig Ave. a ek aie trated explanation showing how KRISS-K ROSS q venates all types of razor blades (except: Durham give me details of your special introductory offer gihel at pre KRISS-KROSS makes unique Xmas gift that membered for years to tractively boxed in holly a novel and will be re come. At- wrapper for Razor blades KRISS-KRCSS is so re- markable that it is more a you are giving * y complete fllus- J i ' ee 3-way razor away . holiday season. Inexpensive. Also || § Name ; blade-rejuvenator than a ideal remembrance for business i| nad ' stropper. It embodies 7 houses to give emplovees or special Sk bf - ' t customers. Town State { mechanical teatures that z Check here if interested in becoming a represent have long baffled inventors. — = oo ee ee ee ee ee ee ee ee ee

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