Popular Mechanics 1922-06: Vol 37 Iss 6

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OPULAR aivw Oo? MECHANICS MAGAZINE WRITTEN SO YOU CAN UNDERSTAND IT

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Learn Auto and Tractor Trade Fill a Job Like This! A Raiseot $150a Mont How 8 Weeks’ Scientific Practice With Tools Lifted Me From a Laborer’s $12.50 a Week To a Foremanship at $2,400.00 a Year A TRUE STORY—By Louis Beimer MARLIN, TEXAS At the age of 20 years I was drawing $12.50 a week— laborer’s pay. At the age of 24 I am a foreman and my salary is $2,400.00 a year. But it didn’t take me four years to make the jump. I qualified for the advancement by only eight weeks’ scientific practice with tools. Then, in two quick steps, I reached my present position. Those eight weeks were spent in one of Henry J. Rahe’s big auto and tractor schools. I earned $50 a month before I went there. On my return home, I went to work for $150 a month and in a very short time was made foreman at $200 a month—a total salary increase of $150 a month, due entirely to Rahe training. If you want to get ahead QUICKLY, take the quick, easy, thorough course at a Rahe School.—Louis Beimer. "ll Pay Your Railroad Fare To CHICAGO or CINCINNATI I'm going to start hundreds of men to QUICK success in the next few weeks, just as I started Beimer. Be one of them and travel FREE to my nearest school. I'll pay your railroad fare to my school nearest your home, no matter what part of the country you live in. Special Course for High School Students Limited Classes now forming for June 12, 19 and 26, July 3 and 10. Write NOW for SPECIAL LOW RATES. out of the army Be a Specialist! (ni p 8 of unskilled job tous nters! My easy, practical course in motor-maintenance engineering will make you an expert—a specralist—in just a few weeks! A Job Is depen For You! This is a BIG year in the n are needed. It’s YOUR big otor business. Thousands of Rah¢ ypportunity. Let me prove it! Wr -trained specialists ite me today.— Be Sure to Address My Nearest School Rahe Fractor SCROOLS CINCINNATI Ninth and Wainut Dept. 892 CHICAGO Michigan and Ontario Louis Beimer who says Rahe training put him on “Easy Street”’ in two months. Wayne Russell, 20 years old, of Waldo, Ark., says Rahe training multiplied his pay by ) EN. I earned $1.50 a day before,” he writes “My salary is now $1.50 an hour.”’ W. W. Peace, another Rahe graduate, writes of getting $250 a month ar expenses operating a tractor in the oil fields. Emanuel Rushfeldt, Vulcan, Alberta, says, “Earning $10 a day. Formerly earned $50 a month; 20 years old.” Thousands of Rahe-trained ex- perts make success reports like these. Thousands of Men Needed: $3,000 to $10,000 a Year! More than 40,000 men taken the “Rahe Way” cess. Thousands more are needed now. I never knew a better time to start. Calls for fahe-trained men come from all parts of the country. Quick, Easy Training No “book-learning” required just easy, scientific practice wit! tools on etigines, cars, tracto! Master instructors tell you t! “hows” and ‘‘whys.” I furnis! everything. And in just a fi weeks you'll be ready for BIG MONEY My big illustrated b details of free fare low tuition and pr of what Rahe tr will do for YOU -~a card will do. have to suc- Write for ther Mary Ps

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of ig ee gd * Popular Mechanics Magazine REGISTERED IN U. PATENT OFFICE WRITTEN SO YOU CAN UNDERSTAND IT JUNE, 1922 No. 6 When the Brakes Are of First Importance | THE WEST, logging camps are mostly situated in the hills, and the heavy loads of logs have to be hauled out, always downhill. Often that helps to make the hauling easy, but sometimes the grades are so steep that it makes it too easy—so easy that it entails difficulty. In- deed, in these instances the term hauling is a misnomer, for that implies pulling the load, and the operation actually consists in pushing against the load instead of pulling it. Two and a half miles of spe- cially constructed track is used at one western logging camp for transporting neavy loads on a large motor truck down eo aa 2 =: a very steep grade. The truck is six wheeled, and has powerful brakes on its four rear wheels. These brakes are con trolled exclusively by one man, while another takes care of the driving ind steering, The wooden track has a continuous serpentine wire cable fastened to it so that it keeps the wheels from slipping when the brakes are on, and helps the traction in going upgrade. Along the center of the track, and between the cat wheels, are two wooden guides that help the driver to keep the truck from leaving the track. Specially Constructed Track for Hauling Heavy Loads on a Truck down a Very Steep Grade: Two Operators Are Necessary, the One on tke Right Having Exclusive Control of the Brakes on the Rear Wheels. The Driving and Steering are Done Entirely by the Other Man - = * * a)

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818 POPULAR PROTECTION-SIGNAL DEVICE FIRES TEN SHOTS As a protection against burglary or theft, an alarm signal has been devised which is adaptable to many uses. In size, it is only a little larger than a big watch, which it resembles. It is loaded with 10 blank cartridges which are fired by a fuse on the inside of the device. In case of danger it is only necessary to release a safety catch on the face of the device and drop or throw the signal, keeping hold of the finger ring, from which the alarm is released when flung. This action ignites 7 " 4 * J S eel er ee MECHANICS HIGH-PRESSURE GAS SYSTEMS TO SOLVE FUEL PROBLEM In the interest of economy and as the first step toward the solution of the fuel problem, engineers are now seriously con- sidering the plan of converting the coal at the mines into gas which would be distributed through pipe lines to distant cities. Under this plan, large gas plants would be erected at the mines, and the gas would be piped under high pressure to the cities, where it would be used for nearly all purposes where coal is now employed, such as steam and _ heating plants. At reduced pressure, it would be introduced into the service mains for household uses. Under present conditions, it costs more to transport and dis tribute a ton of coal than the coal itself costs at the mine, and the saving of these charges should be sufficient to defray the costs of installation and upkeep of the gas plants and pipe lines. The value of the by-products recov- ered during the distillation of the coal would form an important source of revenue which would go far toward reducing the cost of gas. The secondary economies resulting from the use of this clean fuel would be beyond cal culation. Better economy of the heat contained in the fuel would be manifest immediately, while the abolishment of the smoke nuisance in the cities would effect savings in innumerable ways. Long-distance transmission of electricity over wires and the transportation of oil for great distances through pipe lines now = are common practice, so, while By Pulling the Finger Ring of This Alarm Signal, the Fuse is the distribution of high-pressure Ignited, and This Causes 10 Blank Cartridges to be Fired in Rapid Succession the fuse, which in turn fires the 10 shots in succession. The device can be at- tached to windows or doors to act as a burglar alarm or fastened to a parked au- tomobile, and may also be carried in the pocket to be used as a distress signal in case of holdup. After being fired, the case may be returned to the manufacturer for inspection and reloading. @ Announcement was recently made that the government of Brazil had officially changed the name of the River of Doubt, discovered by Theodore Roosevelt, to the Roosevelt River. gas may at first appear as a rad- ical departure, it is, in fact, but a logical step in the interest of economy and convenience. RADIO APPARATUS WILL MAKE MOUNTAIN CLIMBING SAFER A French engineer, after years of study, has succeeded in constructing radio ap- paratus capable of withstanding the severe atmospheric changes of high altitudes that would break ordinary instruments. It is proposed that mountain-climbing parties in the vicinity of Mont Blanc be supplied with small wireless outfits with which to summon aid in case of necessity. ~

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me — * REMARKABLE GLIDER FLIGHT IN SWITZERLAND ——— Above The Motorless Glider in Flight over the Snow-Covered Hills. On This Flight the Glider Was in the Air for 40 Seconds and At- tained a Height of More than 150 Feet in Its 600-Yard Flight. Right: About to Take Off for a Flight. This Machine Appears to Be Much Smaller than Those be- ing Used for Gliding Flight in Germany. It is Patterned Much after the Standard Airplanes, the Constructi n, How- ever, Being Much Lighter. The Glider is Launched by Moving Forward against the Wind from the Top of a Small Hill

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820 POPULAR CANON WALLS SERVE AS POLES FOR TRANSMISSION WIRES With a right of way that runs through solid rock, the Denver and Rio Grande Railway finds that in certain cafions it 1s

Placing the Wires on Steel Brackets Set in the Wall was Found to Be the Most Practical Method of Carrying the Wires through This Narrow Cafion more practicable to use the sides of walls than to try to set poles along the tracks,

Locomotive with Tender and Driving System at Each End, Designed to Accommodate a Large Boiler with Great Steam-Producing Capacity in Proportion to the Total Weight: It was Built in England for Use in Natal, South Africa

MECHANICS Braced steel brackets driven into the walls of the cafon serve to carry the wires. To reach these, it is necessary to use hanging ladders which are made of 2 by 4-in. pieces held by heavy cables. The railway, in many places, has to divide its right of way with a stream. NEW LIBRARY AT LOUVAIN NOW BEING ERECTED The library of the University of Lou- vain, that was destroyed by the Germans during their march through Belgium in 1914, is to be replaced by a building which is a gift by the people of the United States to the Belgian people. The new structure, the contract for which is already let to a New York concern, will cost more than $1,000,000, and will be in the style of the Flemish Renaissance, sur mounted by a tower 375 ft. high, with a main building 220 ft. long and 150 ft wide. In the tower is to be a belfry, and a carillon, or chimes, that will play the national airs of all the allied nations. The corner stone of the building was laid with appropriate international ceremonies, July 28, last year. DOUBLE-DRIVE LOCOMOTIVE WITH BOILER IN CENTER Very unusual in design, at least as far as this country is concerned, is a loco motive built in England for use in South Africa. The object of the design is to obtain the greatest possible power for any given weight allowance. <A very even distribution of the weight over the axles is obtained by placing the boiler be tween two driving systems, which are in connection with a tender at each end The boiler itself is like that of any other locomotive, and at its fire-box end is th: cab. This construction provides room for a very large boiler with great steam producing capacity.

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_— = «<< HIGH-TENSION DIRECT-CURRENT POWER FROM HOUSE CIRCUITS New Machine Changes 110-Volt Alternating Current to 10,000-Volt Direct Current—Inexpensive Wireless Sending Sets for Amateurs Is Probable Result By H. A. LANE ESEARCH, study, and practice dur- ing the history of electricity have resulted in the present-day usefulness of this wonderful and invisible force or energy. The mere pushing of a button to illuminate a home, and the throwing of a switch to put huge machines into op- eration, were considered marvelous when first introduced, but are quite common- place now. Today one of the most absorb- ing problems con- fronting the minds of those engaged in the electrical industry, is the development of wireless telephony and telegraphy. Nu- merous broadcasting stations enable repro- ductions of the voices of noted speakers and singers, and also musical scores, to be heard within the fam- ily circle for the bene- fit and entertainment of all who care to lis- ten. To enjoy the concerts, speeches, etc., which compose the “current events” of the radio world, all hat is needed is the possession of a re- ceiving set with the ordinary simple wiring for an acrial. Should the amateur, however, desire to do any sending or broadcasting, he must first install costly and more complicated equipment, such as motor-generator sets, large batteries, vacuum tubes, filaments, or similar apparatus found in the usual sending stations. This entails a con siderable outlay of money, and is a draw back to persons who are not supplied with sufficient funds to carry out thei: ideas of an experimental nature. To these experimenters and amateurs, great ‘ t pos

“Transrectiformer” Which Changes the Ordinary House-Circuit Current to High-Voltage Alternat- ing Current, and Then Rectifies It to Current sibilities have been opened up by an in- vention of C. H. Hulbert, of Chicago. This man, whose typical and sound maxim is, “Thinking about anything is all right, but if you want results, you must work it out,’ has patiently perse- vered in his theory since 1907. At that time, when employed by the government in the Philippine Is lands as an expert electrician, he con ceived the idea of producing high-volt age direct current from a_ low-voltage alternating source, In short, rectification was his constant thought. Those famil iar with alternating current know the characteristics of the sine wave, and its de viation from “zero” to “maximum,” on one side of a given line, and then the re version back to zero again, from which the curve extends to a maximum on the other side of the lin« The progression from one maximum to the other constitutes a cycle, frequency, o1 revolution. This cycle, therefore, consists of two actual deviations from the center, or zero both of equal strength, but in opposite directions. [ Direct Therefore, if an alternating current has 60 complete cycles per minute which is the common lighting voltage used in homes, and an interrupter, o1 spark gap, is employed in the circuit and operates 60 times per minute, it can b« readily seen that during the periods when the gap is closed, an even flow of 60 hall cycles will ensue, producing a direct cur rent

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822 POPULAR Acting upon this theory, Hulbert tire- lessly pursued his experiments, trying various windings, or coils, and experi- menting with different voltages. Al- though having left the employ of the government and embarked in mining ventures on the islands, the hard-working genius gradually became convinced that electrical research was his real field. In July, 1921, he decided to come back to the States and completely develop his idea. The results speak for themselves. His vision has been

Y rewarded with the pro- duction of an instru ment that performs, at one operation, the as- ARARAA T VVVVV * VARIABLE tonishing feat of trans- =‘Odoovmon forming low-voltage STs aime: alternating current to a 4) high-voltage direct one ~ By connecting the ap paratus to an ordinary 110-volt, 60-cycle alter nating-current lighting circuit, it is possible to

MECHANICS care is taken. The apparent economy of the apparatus will aid many chemical and physical-research laboratories in colleges, schools, and factories, which have been forced to omit laboratory work requiring high-potential direct current, simply through the lack of necessary financial means. Continuous-wave telegraphy will also be greatly reduced in cost by the invention. Other uses to chine can be put which the Hulbert ma are X-ray photography, smoke precipitation, the testing « joh-te | ee esting of high-tension . 730-0 -50 insulating materials, as WW well as many practical CHOKE COIL | és ; : “t adaptations in the in | dustrial and _ scientific amen world, where the meth 4 . 2) (©) ods now in vogue ar | expensive and ineff cient by comparison. Wireless operator who have examined thx

obtain 10,000-volt = di rect current at 30 milli- amperes, thus yielding | WY | || apparatus realize the 6) @ © ¢ aiidae oes Y ||| possibilities of a new NO 6 RHEOSTAT —)PANEL ON TRANSRECTIFORMER method of selective 40 OHMS, 3 AMA | sending, while power engineers are impressed 300 watts of power. In addition to attaining | _—— a rr "ov. 60 CYCLE CO with the production of

this remarkable result, oa, = there are no rotary or vibrating parts to get out of order, no jars to break, no cells to over heat, no fragile and ex- pensive vacuum tubes to replace, and no fila- ments to burn out or depreciate. Especially appealing to the experi- menter is the great durability of the ma- chine, it being practically impossible to burn out the windings, if but the usual

BALANCED CONDENSER IN OIL Wiring Diagram of Transrectiformer Which Illustrates the Different Connections high-voltage direct cur rent. X-ray experts are astonished to learn that alternating current could be transformed and rectified to any de sired potential and wave form of direct current. The united opinion of those who have wit nessed demonstrations of the machine is that a great field of use- fulness awaits the practical application of this noteworthy invention, but that, as yet, its real worth cannot be estimated.

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Any Kind of Tune, Soft or Loud, can be Played on This Whistle under the Hood, Which is Controlled, as Shown, by a Handle near the Steering Wheel

AUTOMOBILE WHISTLE PLAYS ANY TUNE AT ANY PITCH Any tune can be played by any auto ist, musically educated or otherwise, on a novel kind of auto accessory in the form of a whistle that is under the hood. and is operated by a handle near the steering wheel. The pressure necessary to blow the whistle is supplied by the exhaust gases from the motor, and the volume, as well as the pitch, of the sound is under perfect control by means of the operating handle. Already, it is stated, a great number of these whistles have been installed on automobiles.

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POPULAR * MebAdaea Tete MECHANICS ey AMS SERV Left: Part of Electrical Equipment Known as Dimmers, Which are Used to Vary the Brilliancy of the Lights. Center: St. Mar k’s Church in New York City. Right: Portion of Elaborate Switchboard Which has been Installed in the Church to Produce Unusual Lighting Effects UNUSUAL LIGHTING EFFECTS PRODUCED IN CHURCH vastly different from hose ordinarily used in churches, have been produced in St. Mark’s Church, New York City. The Rev. William Norman (;uthrie, conceived the idea ot delivering meaning Lighting efte rector, “prismatic sermons,” the use o! varicolored lights in syn- chronism with tl sermon. Realization of this unusual undertaking required “eee Saharat shone aoe rathet elaporate electrical equipment. Fixtures, having lamps of red, blue, green, and amber color, were uniformly distrib- uted throughout the interior, each lamp being so that r the various diffusion of two or more of them, could be obtained from the switch- board. Clear lamps and spotlights, with wired either of tints, or a special shields that conceal them from the congregation, are also installed in sufficient numbers to provide’ proper illumination for reading purposes. Fa- vorable comment on the innovation has been plentiful, and it is thought that the same, ora similar, course will be followed : 3 places of wot nip in other HOME REFRIGERATION PLANT SIMPLE AND NOISELESS Refrigeration, as a home has been made simple and automatic by the introduction of an ice machine which op erates on the ammonia-absorption prin ciple. This method results in the drawing out of the heat in the refrigerator, and process, creates a perfectly dry, cold atmospher: No moving parts are incorporated in the apparatus, which consequently functions without any noise and needs practically no attention or The outfit, which requires city-gas and water connections, care. Simple and Noiseless Home Refrigeration Plant, Sh ing Generator-Absorber, Condenser Coil and Outgoing and Return Pipes and an outlet through a claimed to be less expensive in operation than the cost of ice in maintaining the same temperature, drainpipe, 1

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824 POPULAR MEMORIAL TO ROBERT E. PEARY TYPIFIES ARCTIC EXPLOITS A monument has been erected at the Arlington National Cemetery in memory

€ PyR 7 Granite Memorial to Rear Admiral Peary in Arlington Cemetery, Unveiled April 6, the Thirteenth Anniversary of His Discovery of the North It Is a Reproduction of the Earth, with the Embossed Star

MECHANICS of the late Rear Admiral Robert E. Peary, discoverer of the north pole, and was un- veiled April 6, the 13th anniversary of his achievement. The monument is fashioned from a design of the explorer’s own sug- gestion. It is in the form \% of a large globe with the terrestrial continents and islands embossed on it, and in proper axial posi- tion with the north pole, represented by an em- bossed star. This globe rests on a solid granite base, upon which are suitable inscriptions. The actual unveiling of the monument was done by the late admiral’s daugh- ter, who was born in the arctic regions during one of the polar expeditions, and was known as the “Snow Baby.” The cere- monies were under the auspices of the National Geographic Society, and were participated in by UNDERWOOD & UNDERWOOD President Harding, the orth Pole: yore , . “ ae Pole ‘Shown by an Sccretary of the navy, and other high officials. “DIREC T-POSITIVE” HOME-MOVIE CAMERA A’ interesting development arising out of the invention of the so-called “direct-positive” photographic paper is the direct-positive motion-picture camera, This camera, in operation and appearance, resembles the ordinary one, but instead of the celluloid negative film, it uses the new paper, which eliminates printing and makes it possible to show the pictures within three minutes after the exposure has been made. The camera also offers a ready means of satisfying the curiosity of thousands of potential movie stars— not to mention the millions of “fans’— who are anxious to see how they them- selves “register.” To show the subject in continuous mo- tion, the “film” is punched and cut into separate pictures by a special device, and the cut pictures inserted into a booklet provided for the purpose. By running the booked pictures between the thumb and index finger, the illusion of motion is produced, as in the almost-forgotten Edison “mutoscopes” of the early nine- ties. The machine utilizes perforated paper of the same width as the regular motion-picture film. However, it is not restricted to the use of perforated paper ; an additional device incorporated in the camera enables the operator to use plain paper at will, which, in many Cases, is a desirable advantage. Under ordinary operating conditions, six exposures per foot of paper are made. \s the machine holds a roll containing 200 ft., about 1,200 pictures are possible before it necessary to reload. The camera weighs 10 lb.; measures 6 by 7 by 12 in., and is equipped with a high grade lens. A counting device connected to the crank handle registers the number of exposures made, each revolution of the crank handle causing oné exposure. The photographic medium is a specially prepared bromide paper, requiring one minute for developing and two minutes for fixing and toning. It has a remark ably high speed, rivaling that of a good grade of fast dry plate. Two fully timed exposures per second are possible even with the scant illumination furnished by a 500-watt lamp. Of course, with the illumination produced by high-actinic higher becomes lights, or under daylight, much speeds are possible.

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This Is the Camera for Taking Moving \ Pictures at Home on Strips of ‘“‘Direct- | e? Positive’ Paper. Each Revolution of the Handle Causes One Exposure to be Made, and Two Fully Timed Exposures per Sec-

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The Finished Pictures can be Bound in a Case, and When Allowed to Slip Rapidly un- der the Finger, will Give the Appearance of the Subject in Motion

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826 ELECTRICALLY HEATED KNIFE AIDS BATTERY MEN Storage-battery, tear-down, and reassem- bly work has been facilitated by the intro- duction of a knife having an electrical- A Special Electrical-Heating Element in the Knife Makes It an Easy Matter to Remove the Sealing Compound from Storage Batteries heating element in the blade, which is fastened in a heavy handle. Attached to the handle are rubber-covered wires terminating in clips for connection to any six-volt cell, which quickly heats the ap- pliance for the removal of sealing com- pound or the resealing of batteries. POPULAR MECHANICS REDUCE DUSTINESS OF MINES BY USING WET DRILLS Investigation by the Bureau of Mines has shown definitely that the so-called wet drills, used in mining, aid materially in reducing the dustiness of the air in drilling places. It has been found, how ever, that if not operating properly, or il out of repair, the wet drills may throw into the air a mist or fog laden with mi nute mineral particles which is almost as dangerous, when breathed, as dry dust. Also, if water, or compressed air and water, under excessive pressure, is forced through the drill, this mineral-laden fog is produced. but even at their worst, the wet drills produce more healthful condi tions than the dry drills. CENTURY-OLD STUMP MILL STILL GRINDS GRAIN After more than a century of useful ness, an old-fashioned stump mill in South Boston, Ind., is still grinding grain today The burrs, or stones for the mill, were brought over to this country from France 117 years ago, and were placed in position by the great-grandfather of the present owner. lHlorsepower is used to operate the grinding mechanism, and 20 minutes are required to grind a bushel of wheat or three minutes for the same amount of coarse feed. | This Old-Fashioned Burr Mill is Still being Used Today, Although It Is More than 100 Years Old. Horses Walking around the Circular Path Furnish the Power

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POPULAR MECHANICS 827 In Using This Watercycle, the Bather Lies Partly in the Water and Turns the Pedals with His Feet, and the G ear-Driven Propeller Sends the Craft Ahead at Good Speed. The Entire Machine Weighs Only 20 Pounds A LIFE-SAVING WATERCYCLE FOLDS INTO SMALL SPACE A watercycle has been invented by a \Visconsin man which can be used for life-saving purposes or as a pleasure craft for bathers. The frame is made of alumi- num tubing and is of knockdown con- struction, held together by thumbscrews. Buoyancy is supplied by two air-inflated tubes, in balloon-cloth cases, which slip over the side tubes ofthe frame. The watercycle is forced through the water by a gear-driven propeller which is operated by bicycle pedals, the machine being teered by a rudder and handlebar. A “lazyback” is supplied when the cycle is to be used as a pleasure craft. The dif- ferent parts of the machine are adjust- able to suit persons of different build, and when dismantled, can be folded and packed in an ordinary suitcase. The com- plete machine weighs only 20 Ib., and when used by a life-saver should develop much greater speed than the fastest swimmer. EXPEDITION TO INVESTIGATE MOUNTAINS OF BURMA With the object of investigating some features in the mountain structure of northwestern Yiinnan, and western Sze- chwan, an expedition, consisting of scien- tists of the university of Glasgow, Scot- land, is on its way to Burma. The district is one of special geological and biological interest. It includes mountain ranges that are believed to be a prolongation of the Himalayas, and that contain peaks of from 20,000 to 25,000 ft. in height. Zoé- logical and botanical collections will be offered to the British Museum of Natural History, and to the India Museum, Cal- cutta. NEW REPRODUCING APPARATUS AIDS RADIO RECEPTION Wireless enthusiasts now have available a new regenerative receiver and a repro- ducing appa- ratus, which will greatly aid in the re- ception of broadcast ra- dio communi- cations. The receiver has a condenser with two ca- pacities brought out to separate binding posts, the lower ca- pacity being used for wave lengths up to 350 meters, while the higher capacity is used from this point up to 500 meters. The sound- chamber arrangement possesses a special metal diaphragm, which is said to yield the finest quality of reproduction.

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POPULAR MECHANICS This Model of the Underground Workings of Two Mines Shows How the Drifts, Tunnels, and Shafts, as Well as the Stopes, or Rooms from Which the Ore has been Taken, would Appear If All of the Surrounding Ground were Taken Away INSIDE WORKINGS OF A MINE VISUALIZED BY A MODEL In a recent lawsuit between mining companies in Utah, a model of the mine properties involved was constructed and used as an exhibit in order to show the inside workings of the mines. These mine workings form a very complicated net- work of rooms and hallways, sometimes extending to great depths, and the model shows in three dimensions the different openings and their relation to each other. he tunnels, raises, and shafts are made of brass rods, bent, cut, and soldered pre- cisely to scale. The stopes, or rooms which the ore has been extracted, are made of wood. The model is mounted on a board, showing a map of the mines as they appear horizontally. from NEW TELEPHONE CABLE LAID ACROSS IRISH CHANNEL A new cable, 251% miles long, has been laid from Port Mora, Scotland, to Port Patrick, Donaghadee, Ireland, which will vreatly improve telephonic communica- tion between those two countries. If the new cable is found to be satisfactory, trunk circuits will. be provided between Glasgow and Belfast by joining up the land lines. The new cable contains four copper wires, insulated by balata, which provide two so-called “physical” circuits. A third circuit will be obtained by the sys- tem known as superposing, forming a so- called “phantom” circuit, which is equiva- lent to a third trunk channel that operates without interfering with conversations carried on over the two physical circuits LIFE-SAVING BELT ADOPTED BY BOLD BOOTLEGGERS Recent raids in Milwaukee, other proof that the ways of the boot- legger are de- vious. In one of these raids, the chief prize co.sisted of a life-saving belt, the inte- rior of which was designed to hold liquor, instead of the old-fashioned cork composi- tions. In use, the belt was hung by straps from the shoulders, resting just under the armpits, so that by pressure of the arms the vender could force the liquid through a faucet affixed at the top. by prohibition authorities furnished Wis., have an-

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830 STRIPS OF MULCHING PAPER PREVENT WEED GROWTH Weeding would become a lost art if the use of mulching paper could be ap- POPULAR MECHANICS TO PRODUCE ELECTRIC POWER WITH LOW-GRADE COAL The problem of the utilization of low- grade coals and lignites is one of utmost importance to Australia. Recent investigations on low-grade coals, containing about 50 per cent of water in the raw state, show that their fuel value can be much im- proved by heat treatment below 400°C. (750°F.). A patented ap- .paratus has been designed for drying and heat-treating the low- grade fuels in a continuous proc- ess, using only the sensible heat in the burnt gases passing from the boiler. This process is now being tested in a commercial way, and, if successful, will be used for the generation of electric These Pineapple Plants are Growing through Slits Cut in the Strips of Mulching Paper, Which Prevent the Growth of Weeds plied to all gardens as successfully as it is in growing pineapples. In this case the strips of paper are rolled out where it is desired to plant, and slits are cut in the paper through which the pineapple suckers are planted. Nothing more is needed until harvest time, as the paper strips prevent the growth of weeds, and conserve the moisture. This method has been introduced in the Philippines, where it has increased the yield of pineapples, according to good authorities, TESTS OF DARKENING EFFECTS OF VARIOUS FLOOR OILS Under the direction of the Department of Agriculture, investigations extending over a period of six months have been made regarding the comparative darkening effects of various floor oils. Three types of mixtures were tested, in an occupied apart- ment, upon pine floors which were very old and dark from many coatings of shellac and varnish, and it was found that a floor oil consisting of one part of boiled linseed oil to three parts of tur- pentine was the most satisfactory. This oil had a cleansing effect, retained a high gloss, and did not darken to any extent the floor, to which it was applied with a mop. qit is stated that on nearly 9,000 farms in New Zealand some form of electric milking machine is used, power. It is claimed that by the use of this new process nine boil ers will give the same steam out- put as would be obtained from 12 boilers fired with the untreated fuel. THREE-SECTIONAL TOP LID FITS ANY GRAND PIANO A patent three-section top lid for grand pianes, which can be fitted to any make of instrument and entirely does away with the projecting point of the lid at the curved corner of the instrument, has been brought out by one of the largest piano makers in England. The new lid is much neater in appearance than the conven- tional one. When folded back, it leaves the top of the piano almost entirely clear, and objects on each side of the front of the piano top, such as lamps or candle- sticks, are left undisturbed by it. Three-Section Top Lid for Grand Pianos, Now in Use in England: When Folded Back, as Shown, It Is Very Compact with No Projecting Point at the Curved Middle of the Right-Hand Side of the Instrument

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POPULAR MECHANICS RADIOTELEPHONE BROADCASTING OVER LIGHT WIRES RECENTLY Major General Squier announced a new and remarkable development, of his invention, in the art of broadcasting wireless telephone news and concerts. This is an outgrowth of “wired wireless,” and a demonstration was held in the signal- corps headquarters where the usual receiving instrument was attached to the electric- lighting wires instead of to an antenna. To install the receiving apparatus, it is only necessary to remove a light bulb from its socket and attach a cord similar to those used for attaching a vacuum cleaner or electric iron. The broadcasting station is connected with the lighting circuit through a lamp receiver, and the wireless impulses travel over the circuit in much the same manner as is the case in using wired wireless over the telephone circuit. This method of broadcasting brings to every home where electric lights are used, the concerts and news that have previously been broadcast in the air. It is not necessary to erect an antenna; simply remove a light bulb and plug in the receiving set, and radio news is immediately available. No headpieces are required, as any of the regular loud-speaking instruments can be used. The further development of this idea should do much to relieve the present congestion of the air. NEW MEANS OF CONTROLLING is ERRATIC RIVER CURRENTS > At last, after 342 years of experimenta- tion, a means has been devised for con trolling the treacherous currents of west- ern rivers. The method applied consists of these tests it is believed that this new in driving a number of concrete piles, method of controlling a river current will about 35 ft. apart, into the river bed and be of incalculable value in reclamation anchoring to the top of each six l-in. to work, and in protecting river banks. 144-in. cables, about 100 ft. long. The other ends of these cables are spread out fanlike, and are connected to the stump ends of hundreds of cut trees, the inter- gradually deposited among the tre branches, forming in time a bar, and making possible the diversion of the stream in any direction desired. Thor ough tests have been made on the Platte River, in Nebraska, and from the results solid sand @ Investigation is being urged as to the advisability of the creation of a United States Aeronautical Academy, to hold the lacing boughs of which fill up any part of the river from bed to surface. The sand held in suspension by the running water same relation to the air service that West Point does to the army and Annapolis to the navy.

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POPULAR DESIGN WALL-POCKET HEATER SET FLUSH IN WALL To meet the demand for a small auxil- iary heating unit with which to remove the chill from the bathroom, or other small room, a wall-pocket eas heater has been designed seueeeneeeel which sits a — aaa flush with the eeceett wall and oc a3gae cupies no 3353aaas | floor space. It abe f can be set into the wall in the space between the studdings, and because of its insulated construction, does not constitute a fire hazard. It burns with a yellow flame, and no air mixer is used, which prevents the possibility of back-firing. The reflecting back is arranged to direct the heat toward the floor from where it rises. ONE GASOLINE ENGINE DRIVES NOVEL POWER SHOVEL It has long been recognized that, to meet certain conditions, a gasoline-driven power shovel would have advantages ovet machines using other forms of power. Gasoline-Driven Power Shovel Actuated by One Engine: The Dipper is Thrust into Digging Position by Hold- ing Line A and Hauling on B, and Raised by Holding B and Hauling on A Any Combination of These Motions may be Effected MECHANICS Many attempts have been made, patterned mostly after the steam shovel, to adapt gasoline power to this type of machine, but all of them have been open to criti cism. Now, however, a new type of gaso- line power shovel has been placed on the market which is a radical departure from the accepted designs. In this machine, which has successfully passed its preliminary trials, all power is supplied from one slow-speed gasoline en gine, and there are no motors, engines, or clutches on the boom. The application of the power for digging is most in genious, all operations being controlled through two cables. At the knee of thx boom is a shaft carrying two pinions and a drum of larger diameter. Two racks on the lower side of the dipper arm engage the pinions, while the two operating lines are fastened to the drum. One of these lines passes over a sheave near the top of the boom and then to the winding drums, while the other line passes to a sheave near the dipper, and thence, over the end of the boom, to the drums. The dipper can be put through any motions possible with the steam shovel, even to the shaking of the dipper to free it of sticky material. The boom may be raised or lowered in the usual manner, while the swing is controlled by a sepa rate clutch. The shovel is mounted on tractor treads and is self-propelled.

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Electrical Equipment Which is Installed at the Central Office to Operate the Measured Telephone-Service Sys- tem: The Two Duplicate Time Clocks are Seen Above and the Pole-Changing Switches Below, Together with Meters, Knife Switches, Fuses, and Other Necessary Apparatus PHONE SERVICE MEASURED LIKE ELECTRIC LIGHT HE the world is now Wash., where about 6,000 subscribers are paying for just the amount of talking they do The new = rates, which are now on trial under orders of the Washington State Board of Public Works, are based on the time con- umed in actual talking the telephone, as gas, electricity, and wa- ter are metered. Under this system the service compariy asserts that it iS possible to reduce the over cost to 85 per cent of ts subscribers and in- crease the capacity of its plant by 2,000 tele- phones without adding to the exchanges. These changes are made possible through the development device known of a as a first metered telephone service in Everett, given in Measured-Service Equipment Which is In- stalled at the Subscriber's Home or Place of Business, Showing the Recording Meter above the Telephone “telechronometer,’ which accurately meas- ures the length of time each telephone is used by the calling party. Incoming calls are not registered. For more than a year the telechronometers have been tested, and last December the y were or- dered placed on all tele- phones in the Everett system. Just recently the work was completed, and the change made from a flat-rate basis to a “pay-for-what-you- use” system, The cere mony of throwing the switch that turned the current into the new system was witnessed by a large number of engineers, public-utilfty officials, mayors, coun- cilmen, and others, from the Pacific Northwest. Among other advan tages of the telechro- nometer, the company $33

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834 POPULAR claims that it will discourage and prob- ably eliminate “listening in” on party lines, as it will cost the eavesdropper money to take down his receiver and gather the neighborhood gossip; unneces- sary and frivolous conversations will be reduced to a minimum, and the use of ten, eight, six, and four-party lines will be increased, because there will be less traffic on the lines. Tests made with the telechronometer while the system was still on a flat-rate basis showed that 50 per cent of the sub- scribers used 78 per cent of the service at a cost of .64 cent per “telechrone,” which is the term used for one minute of conversation. The other 50 per cent used only 22 per cent of the service at a: cost of 2.27 cents a telechrone. Yet all paid the same flat rate for a similar class of service. Telephone service is now given for as little as $1 a month, which entitles the subscriber to 60 telechrones a month. If he uses more than that amount he pays one cent a telechrone for it. Single- party business telephones that formerly cost $6 a month are now $5.25 a month, which entitles the subscriber to 600 tele- chrones, or almost 24 minutes of conver- sation, each business day. The telechronometer is a little device located close to each telephone and regis- ters the time consumed by the calling party, after “central” has made the con- MECHANICS nection. Registration is stopped the in- stant the receiver is replaced on the hook. No influence outside the control of the subscriber can cause registration. The inventor describes the telechro- nometer as a train of gears that controls the dial pointers which register in tens, hundreds, and thousands. Movement of the meter is caused by a polarized relay, which operates as follows: When a sub- scriber removes his receiver from the phone and the operator has made the desired connection, current flows from the central battery to the telephone trans- mitter and the telechronometer begins to register, and when the receiver is hung up, the current is reversed and the meter stops registering. Thus the pointers on the dial measure the exact time of the conversation. The apparatus at the central office con- sists of a duplicate pole-changing switch, each set being controlled by a standard time clock. The unit of time movement of the pole-changing switches for local service is 15 seconds, and the meter dials register one unit for every four current changes from the central pole changer. The two big clocks located in the cen- tral office of the Everett system are guar- anteed to operate with no more than 10 seconds of variation in 24 hours. Any de- fect in the meter would only cause it not to register, and the telephone company is willing to take this chance. FOUR SETS OF HEADPHONES ON RADIO APPARATUS Four sets of headphones, or receivers, can be attached to a new article of radio equipment which has recently made its appearance. The appliance is placed on a table, or stand, and an ordinary receiver Radio Apparatus Placed in Center of Table So That Four Persons can Listen to the Broadcasting held tightly on top of it by means of an elastic band. Rubber extension tubes are then affixed to its base, and an assembled quartet can “listen in” to the broadcasting. EXPERIMENTS IN PRODUCTION OF GERM-KILLING DYES Great strides are being made, in Eng- land, in the production of various dye- stuffs that arg poisonous to some particu- lar disease germ without being in any way injurious either to human beings 01 to any others. Proof that success is being achieved in this direction is demon strated by the fact that at sewage works where the disposal of the sewage depends upon bacterial action, it is now possible by the use of a specific dyestuff to kill other microorganisms which are destruc- tive of the purifying germs without in- juring the latter. Similarly dyes have been produced which pick out and destroy disease germs in the blood.

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COpyY RIGHT, HENRY A. HITRER'S SONS CO SCRAPPING THE WARSHIPS : OF THE U.S. NAVY By f1.G. Laytor LL the glamour, romance, and best traditions of the United States Navy are bound up in the dismantling and scrapping of the many units purchased by the Henry A. Hitner’s Sons Co., of Philadelphia, and now being junked at its huge yards there on the Delaware River. From the old and tiny “A-1 Plung- er’ submarine, one ot the world’s first successful undersea boats, to the moni- tor “Monterey,” built in 1887, and on through the list to the former queen of the navy, the battleship “Wisconsin,” all functioned in the creation of history’s second most powerful naval force. The Limitation of Armament Conference at Washington restricted a completed or under-construction naval program of the United States from approximately 1,370,- 000 tons to 525.000 tons. This necessitated the scrapping or sale by the government of 845,000 tons of all types of its maritime defense to maintain the 525,000-ton first- line naval-strength ratio accepted by the United States as a signatory to the terms of the naval-limitation treaty. The sale of this huge tonnage total Irom our naval list has created a new industry and thrown upon the market for purchase by the highest bidder hundreds of completely equipped fighting craft. The number runs into the hun- dreds, as it takes a great many mixed- caliber battleships of the 12,500-ton “Mis- souri” type and “Eagle” boats of 500 tons to balance capital completed or under construction, 35,000-ton bat- ships, of the tle cruiser or predreadnaught types repre- sented by the 33,190-ton “Tennessee.” This new industry may be best pre- sented by the methods employed at the Hitner yard when it bid successfully for a navy whose total tonnage and fighting strength exceeded that of the States in 1910, or of Italy ning of the World War. Here, tied to the long docks and groan- ing protest as they strain at their haw- sers, are the battleships “Maine,” “Mis- souri,” and “Wisconsin,” for example, and, picking at random from the others, the once proud first-class cruiser “Co- lumbia,” and coast-guard battleship “Num- ber Four,” formerly the “Iowa”; the monitors “Ozark,” “Monterey,” and “Tonopah,” and the destroyers, Eagle United at the begin- 855

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836 boats, and other craft that are just numbers. Powerful oxyacetylene torches wielded by masked and hooded gnomes are cut- ting through the 11-in. nickel-steel turret armor of the “Maine,” while a giant 125- ton crane is snaking out of its barbettes one of the mighty 12-in. 40-caliber rifled guns that once maintained the principles of this federated republic. Farther along the yard, the little sub with its paper-thickness shell is being POPULAR MECHANICS armament conference. Creature of the brain ef J. P. Holland—Robert Fulton of the submarine—the early trials of the “A-1” were the subject of almost as much ridicule and scoffing as marked the first efforts of Fulton on the Hudson River, but the basic principles of the “A-1” are found incorporated, though modernized, in the “S-41,” built nearly 25 years later. Nothing can destroy the place in the history of maritime armament which these old fighting craft hold, or efface from the proud record of our navy the part which they played in its upbuilding, yet one feels a little tightening of the throat when he witnesses a huge piece of side armor go creaking aloft to be dropped upon a pile of scrap, or sees the oxy- acetylene torches cutting up the 12-in. rifles for junk. But the process of con- verting our one-time de- fenses into peaceful uses must go inevitably for- ward. The armor is thrown into open-hearth furnaces, and emerges as one of the most valuable by-products of this big scrapping job. Its alloy Strip of the Waterline Belt of Hull-Armor Plate, “Weighing 25 Tons, being Cut with an Acetylene Torch into 25-Foot Lengths for Open-Hearth Furnace Billets ripped apart with chisels to the accom- paniment of the Gatling-gun-like staccato of compressed-air hammers. The obso- lete monitor “Monterey,” modernized edi- tion of Ericsson’s gallant “Monitor,” with its surface-flush deck, built, 35 years ago, by the Union Iron Works of San Fran- cisco, is rapidly being converted into open-hearth billets, but its 10 and 12-in. rifles still grin menacingly through the turrets of its Ssquatty superstructure, as they did in the early nineties when the “Monterey” was the most powerful battle craft afloat, and as a coast-guard unit was held by naval experts to be invincible. From it grew the double-turreted, 16-in., 25-mile range, super-rifled capital dread- naughts of the “California,” “Arizona,” “Pennsylvania,” and “Tennessee” types, for whom it dies that they may live. The little “A-1 Plunger” was the grand- father of the modern submarine cruiser “S-41” of proved success, that has elimi- nated it from the future navies of the world as “commerce destroyer” by the dis- content of nickel ‘steel makes it adaptable to many peaceful uses, par- ticularly in the automobile industry, into which most of it will find its way. Gray- iron foundries will purchase the small scrap resulting from the crumbling, by huge stone pile drivers with a 100-ton impact, of the almost human machinery which operated gun turrets, ammunition hoists, and refrigerating systems. After being treated in combination with low- grade iron ore, it will be recreated into engine beds, and frames of harvesting and other agricultural machinery. The most precious junk of all is the copper, gun metal, navy brass, manganese, bronze, lead, zinc, and navy compositions, which are sorted into their different grades and sold to metal dealers, and in some in- stances, as with the equipment from the “Maine,” will take form in new ship cast- ings, steam pumps, and. propellers. Complete destruction is not necessary in the case of all the craft. The hulls of some of the torpedo boats will undergo a transformation to adapt them to peace- ful pursuits. This has already been done

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to f COPYRIGHT, UNDERWOOD & UNDERWOOD » Huge Blackboard in the Office of the Chief of Naval Operations, on Which the Daily Movements and Locations of Every Ship in the Navy are Recorded Prevent for Scrapping, Any Possibility Offensive Use Aft Turret of the Battleship ‘“Wiscon- sin,” Listed i Showing of Holes Burned through the 13-Inch Guns Their COPYRIGHT, HENRY A, HITNER’S SONS CO

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838 POPULAR MECHANICS with the,destroyers “Truxton,” “Wor- vices. Destroyer armor is light, and huge den,” and “Whipple,” which will ply 10-ton “crocodile” shears cut it into pieces = — that are remelted and ' rolled into various shapes adapted to structural steel, rails, and sheet plate. Farther along the yard, two old English troop ships, the “Malabar” and “Hotspur,” are lying in the berths once occupied by the international cup defender “Columbia” and Admiral Farragut’s old flagship ‘‘Franklin,’ which were previously scrapped by the same firm. They are valuable junk, these British ships, being constructed of the purest wrought iron, which will be treated through several processes — and converted into stay- PHOTOS COPYRIGHT, HENRY A. HITWER’S SONS CO Torpedo-Boat Destroyer Bulkheads being Sheared into Standard Sizes for bolts, and other forms re- Use as Ordinary Structural Plates in Any Kind of Construction quiring a_ rust-resisting Work in Connection with Peaceful Industries r a metal. The list of the between the United States and Central war craft that now lie at anchor in the America, carrying cargoes of fruit. En- Delaware River or already in process of be- gined with kerosene burners, they are ing scrapped at the Hitner yards’ 1,000-ft. large cargo carriers, and of such light draft that they can navigate shallow rivers on high tide De lie off plantations for ee loading, thereby eliminating lighterage cost. Their clean lines give them great speed, which makes unnecessary the ex- pensive refrigerating system used in slow fruit boats to the States. Such destroyers as are not converted are being ripped apart with powerful chisels operated by compressed-air de- View of the Battleship “Maine,” Tied Up in the oe Yards of Henry A. Hitner’s Sons Company, of Phila- delphia, Ready to be Scrapped: It can be Seen That Part of the Waterline Belt of the 11-Inch Hull Armor has Already been Removed

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EE SS **x* - 3 i Above: Superdreadnaught “‘Washington,” to be Scrapped Although Nearly Three Parts Completed. It was to have been Armed with Eight 16-Inch Guns in Its Main Battery, and Fourteen 5-Inch in Its Secondary Battery. Its Estimated Cost Was $20,000,000 Upper Right: In Another Part of the Henry A. Hitner’s Sons Company’s Yard Is This Partially Dismantled Tor- pedo-Boat Destroyer Lower Right: The Holland “A-1 Plung- er,’ Known as the Grandfather of the Submarine. This Product of the Brain of J. P. Holland—Inventor of the Sub- marine—Was the Precursor of the Mod- ern Undersea Warship, Such as is Exemplified in the Powerful Submarine Cruiser “*S-41"" Below: Modernized Forms of the Fa- mous Ericsson “Monitor,” the First Armorplated, Turreted Battleship Ever Built. These Two Coast-Defense Moni- tors are being Made Ready to be Dis- mantled kkk PHOTOS COPYRIGHT, HENRY A, HITNER’S SONS CO

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Above: A 40-Ton Plate of 14-Inch Hull Armor being Swung by a Crane from a Freight Car to the Ground in the Henry A. Hitner’s Sons Company’s Yard on the Delaware River, Philadelphia Upper Right: Pile of Power Compres- sors Ready to be Scrapped with an Oxyacetylene Torch, Which will Cut Furnace Industry Them into Billets for the Open-Hearth Lower Right: Crocodile Shear Cutting Up a Plate of Protective Deck Chrome- Nickel Steel Armor from a Scrapped Torpedo-Boat Destroyer. This Valuable Alloy is Adapted to Many Peaceful Uses, Particularly in the Automobile ap Pile of Battleship Boiler Tubes Part of the Yard Ready to be Broken Up and Then Thrown imto the Furnace to be Formed imto Billets xk PHOTOS COPYRIGHT, HENRY A. HITHER'S SONS CO

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waterfront, include, in addition to those already mentioned, the cruisers “Detroit” and “Raleigh” ; the destroyers “Stewart,” “ Bainbridge,” “‘Perry,”’ “Barry,” “Dale,” “Paul Jones,” “Hull,” “Law- rence,” “Smith,” and “De- catur’’; the monitors “Canonicus,” “Mahopic,” ‘Catskill,’ ‘‘Jason,”’ ‘“‘Ajax,”’ “‘Nachant,”’ “Puritan,” and “Mianta- nomah,” as well as Eagle boats, submarine chasers, mine sweepers, and sub- marines. Junking of ships on a scale of such magnitude as this has probably POPULAR MECHANICS CorvarGut, HENRY A. HITHER’S SOmS CO. Above: Close-Up of a 25-Ton Strip of 11-Inch Waterline Ar- mor Plate from the Hull of a Battleship being Cut into 25-Foot Billets with an Acetylene Torch. Left: Interior of the Hull of the Torpedo-Boat Destroyer “Worden,” being Converted into a Fruit Freighter to Trade be- tween This Country and the West Indies never before been under- taken at any one yard in the world, and certainly not here, although this yard has for 30 years spe- cialized in that business. @The trunk telephone between Sydney and Melbourne, Australia, has been duplicated by super- imposing a duplex tele- graph circuit upon each of the circuit wires. The new cable is 580 miles long. PORTUGUESE AIRMAN HALTED BY WRECKED AIRPLANE In an attempt to make a transatlantic flight from Lisbon, Portugal, to Pernam- buco, Brazil, two Portuguese naval air- men, after covering more than three- quarters of the journey, were forced to stop at St. Paul’s Rocks because of the wrecking of their seaplane. The start was made on March 30, from Lisbon, and the route followed was to the Canary Islands, thence to Cape Verde Islands, and to St. Paul’s Rocks, where the flight stopped on April 18. St. Paul’s Rocks are only about 500 miles from Pernambuco, the goal of the airmen, so one may judge how near they came to succeeding in their venture. They used only a small type of naval sea- plane equipped with a 360-hp. engine and having a fuel capacity for only 18 hours’ flying. This is the first attempt to fly the Atlantic from east to west in a seaplane, and while they fell short of their goal, the distance covered speaks volumes for the ability of the men and the reliability of their machine, as no extensive patrol was maintained to guide the airmen.

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842 POPULAR MECHANICS RADIO EQUIPMENT INSTALLED ON RAILROAD TRAINS Radiophone Equipment Installed in a Buffet Car on the Lackawanna Railroad being Tested Prior to Its Regular Use on the Trains Radiophone equipment has been installed on trains of two rail- roads in this country, namely, the Lackawanna, and the Chicago, Milwaukee, and St. Paul. Both these companies have converted buffet cars into virtual receiving stations, wherein the passengers can don headpieces and listen to the various broad- casting. Or, if the headpieces are not desirable, the occupants may be = using six wires, and the other road two, with the entire set be- ing grounded through the axles to the rails. Although activities along this line have hitherto been more or less of an experimental nature, it is thought that the suc- cess achieved by these companies will induce other railways to pro- vide similar amusement for the traveling public; also, that the the Lackawanna Railroad Buffet Car ~~ Connected on Top of the Train before Making an Experimental rip with the Apparatus next logical step will be to install trans- mitting apparatus on these trains for the further convenience of the. passengers, entertained by means of a loud- speaking horn, which is also connected in the circuit. The coaches are surmounted by spe- cial aerials running the length of the cars, and are of different construction, the Lackawanna Aerial of Radiophone Equipment on Top of the Chicago, Milwau- kee, and St. Paul Railroad’s Buffet Car, Showing How Two Wires are Carried on Two-Foot Posts, the Full Length of the Car Radiophone Installation on the Chicago, Milwaukee, and St. Paul Railroad who will then be enabled to send messages while en route. @Wattle wood and the spent bark from the _ wattle-extract mills, are to be used in the manu- facture of wrapping paper, ac- cording to the announced plans of a company in Natal, South Africa.

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POPULAR MECHANICS 843 = i or * é eS Se ee Perea oe » LIGHTHOUSE FLOATS FIVE MILES DOWN A RIVER Houses in cities—even large ones—have often been moved from place to place, and now the same thing has happened to a lighthouse of quite respectable proportions. The structure is 55 ft. high, and weighs 80 tons. It was put aboard a large scow at its original site on the Niagara River, and was then towed five miles along the river to Grand Island, where it was put ashore. The inhabitants along the river front rubbed their eyes to see if they were awake, when they saw the well-known lighthouse floating majestically along the river. A NEW CUSTOMER FOR THE GASOLINE-FILLING STATION THs little airplane has been designed in the search for a small machine that would be within the reach of all enthusiasts. It weighs only 500 Ib., and is small enough to be kept in the garage. The claim is made that it can be manufactured for less than the price of a small cateeneiite, See flying speed is 100 miles per hour, and it is so small that it can land on, or take off from, a space no wider than the ordinary city street.

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844 POPULAR UNUSUAL HAND-CARVED CLOCK MADE ENTIRELY OF WOOD A remarkable clock has just been com- pleted by an ironworker of Peoria, IIL, in which all of the parts, even the shafts Hand-Carved Clock “)" Which was Made Entirely of Wood, Showing the Intricate Design Achieved by the Maker. Insert: Another View of | § the Hand-Carved Clock. | Illustrating the Set of Wooden Gears and Pinions COPYRIGHT, INTERMATIONSL and fretworked gears, are carved by hand from solid pieces of wood. It has taken three years to make the clock, which not only tells time but also gives the day and month, weather prospects, and other information. However, its worth as a timepiece will depend on how the gears and pinions withstand climatic changes. IECHANICS ELECTRIC-LIGHTING PROJECT FOR FRENCH VILLAGES Shell-torn districts of northern France are being repopulated by returning na- tives, and these have made use of the miscellaneous electrical equipment left there by the different armies. Generators, driven by gasoline engines, have been put in use, and the cellars of ruined buildings, or the poorest wooden huts, are furnished with light and power. So great have been the benefits derived from these small and crude outfits, that the ministers of agriculture, finance, interior, and of the public works, have obtained the approval of the president for the establishment of an inter-ministerial commission. This commission will draw up a program for the distribution of electrical power in the rural communities and also endeavor to find a way for the proper financing of the project. THREE-MILE-A-MINUTE MARK REACHED BY RACING CAR On Thursday, April 6, over the Daytona beach course, Florida, the coveted speed mark of three miles a minute was reached by Sig Haugdahl driving a specially de- signed racing car. The official time for the measured mile, recorded electrically, was 19.97 seconds, which corresponds to a speed of 180.27 miles per hour. The previous record made on this same course was 24 miles per hour less than the new mark. The car used by Haugdahl was powered by a 250-hp. aluminum hydro- plane motor, weighing only 610 Ib. The body of the car is only 20 in. wide and is streamlined. Even the axles and all exposed bolts and nuts have received the same careful treatment. Left: Rear View of the Specially Designed Motor Car Which Traveled at the Rate of 180.27 Miles per Hour, Showing the Unusual Lines of the Body. | the Driver at the Wheel, and Displaying the Peculiar Bullet- Right: Side View, Showing like Streamline Design

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ccSs— SSS H COMMENT an? REVIEW (These pages were printed April 25, 1922.] ACKSONVILLE, Fila. has an active Association of Commerce, that does things well, but its members are even more proud of the Junior Association of ommerce, largely, but not exclusively, composed of young men who are sons of members of the parent body. These budding captains of industry last month scored a tremendous success in a “Made in Jackson- Enter prising ville” week. The event opened with a mammoth street parade, Junior composed entirely of exhibits of things made in their own city. The largest auditorium in the city was packed with exhibits and A. of C. crowded all week. In addition to local residents and the thou- sands of winter tourists in town, large delegations attended from down state, for the event was advertised widely in a very attrac- tive, and therefore effective, way. The few old men doubters who failed to realize the tremendous power of organized young men changed to enthusiastic boosters the first day, for the way the boys carried the enterprise over the top was something inspiring. What these young men—most of whom are under 25—accomplished, is a demonstration of wonderful possibilities to the young men in other cities, and an example well worth following throughout the country. The Jacksonville juniors, who conceived and carried out the idea entirely on their own initiative, proved their mettle in a big success, both financial and otherwise, and their first effort has already become an annual event. If the seniors have already preémpted the “made here” week elsewhere, there are other equally good things waiting development. ’Attaboy! 1 0) ) "THE Portuguese have always been daring navigators, and still stand among the best sailors in the world. The attempted flight of two of them from Portugal to Brazil has been watched with interest from day to day by the entire world, which, within a few hours, knows of their departure or arrival at each station. It is to be hoped the wrecking of their seaplane Trans- at St. Paul’s Rocks will not seriously delay the completion of their journey, for which.a new plane is reported under way from Ocean Portugal. F lights In several countries, plans are under way for an airplane cir- cumnavigation of the earth, and it is not unlikely the present year may witness at least the attempt to do so. The Pacific Ocean, of course, presents the longest “leg” of the trip, but even these severe conditions are not likely to delay the effort very long, nor discourage these intrepid trail blazers of the air. Deserts and other wildernesses of the earth are already being explored by airmen, who are discovering routes and means of entrance which have hitherto ed caravans and horsemen. Before many years, the secrets of jungles and mountain fastnesses, which thus far nature has guarded so jealously, will be an open book and familiar to children in grammar-school grades. 1/0) | - HE province of the magician in these days is to amuse and entertain by an | appeal to both the eye and mind. No longer is he an individual feared for the evil influence he was once supposed to exert. On the contrary, magic is one of the finest types of entertainment we have. To perfect himself requires the patient, unsparing practice of a lifetime, and the place of high Magicians regard and affection which the magician may attain was notably D manifested a few weeks ago when Keller passed: on into that, eserve greater mystery than any even he had known. Protection A mystery is something we cannot understand; with an ex- planation, the mystery vanishes and the subject of it immediately loses its interest and attraction. On several occasions, in our effort to bring to our readers the earliest information on all subjects, this magazine has explained and illustrated just how certain unusually baffling major mysteries were performed. These stories were acquired in what seemed a perfectly honorable way, having come in from paid contributors. We are so elated at getting these “scoops” that it never occurred to our editorial department that what we expected our readers would regard as enterprise, in reality was a most unfair and unjust i thing to do. Not until Harry Houdini, president of the Society of American Ma- cc —— 4) +

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846 CSS

cS=— POPULAR MECHANICS

gicians—1,000 strong—explained the matter, did we realize what an “exposure” meant to the performer. A major mystery is the product of the brain of some magician, to the perfection of which he often works for years, and in some cases has expended thousands of dollars in experimenting and building one set of costly apparatus after another. And when it is finally a success, and he hopes to receive the reward he so fully deserves, there is no possible way in which he can protect himself. The act cannot be copyrighted; neither, like an invention, can it be patented. To do so would involve a minute description of how it is done. He is therefore helpless to protect himself except by an appeal to the fair-mindedness of publishers to refrain from tearing down in one short article that which he has worked so long and hard to produce, and on which he must depend for the finan- cial return to which he is entitled. The case is a most unusual one, for which we recall no parallel. This magazine has already published its decision to refrain hereafter from describing how such mystery acts are produced, and we feel sure our readers will not only approve our decision, but join with us in the hope that all publishers will adopt the same policy; for whatever satisfaction the reader may obtain from this knowledge cannot compare with the interest and pleasure he would otherwise have enjoyed in witnessing a clever and scientific performance. oo BOSTon, be it said to her great credit, finds time in these whirlwind days to recall and suitably observe many of the anniversaries of great historical im- portance in the annals of our country. We would all be better Americans did we more frequently follow this example. The recent anniversary of

the ever-thrilling ride of Paul Revere and William Dawes was The Days observed by exercises in Faneuil Hall and on the Boston Com- f°76 mon, and the ride itself was reénacted. 7 It is impossible to refrain from contrasting this event of 147 and Now years ago with the facilities of today. Then, the breathless, hard-

riding horseman was the only quick and certain means of com- munication. Today, either the telephone, telegraph, automobile, motorcycle, airplane, or wireless would transmit the alarm in a period of time rang- ing from a few seconds to, at most, 15 minutes, although the splendid spirit of patriotism in which the farmers responded then could not be excelled by anything which modern invention has yet provided, or ever will. 1/0) <5) i HAT the taxes which go into the government treasury are being paid in very large part by the comparatively few, is plainly set forth in figures compiled by the New York Globe, which claims that fifteen to twenty million persons failed properly to report their incomes in 1921. It estimates the amount which should have been reported, and was not, at the staggering

A Few figure of $46,000,000,000 during the past five years. Of nearly six Pay the and one-half million farmers—owners and renters—less than six qT. per cent reported an income of over $2,000 in the year 1919, which axes was by no means a bad year agriculturally. Among the wage earners the percentage was only one-eighth of one per cent. The investigation showed very little disposition on the part of the rich to evade proper returns. Doubtless thousands of the smaller taxpayers failed to report through sheer inability to make out the income-tax report, which baffles even the best lawyers. The present system, a relic of war times, is atrocious and should be changed to one which people generally can understand.

H. H. WINDSOR

aS) — —<} +)

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POPULAR MECHANICS LEA SAR ieee * UNVEILING OF MEMORIAL TO BOOKER T. WASHINGTON A MEMORIAL to Booker T. Washington has been erected at the Tuskegee Institute, and was recently un- veiled by Alvin J. Neely, president of the Tuskegee Alumni Association. During the ceremony he presented a gift of $75,000 from the association to the institute. ODD DEPARTURE IN HEATERS USED IN SWITZERLAND “Linear heating” is a term used by Swiss engineers and defines the method employed by them to obtain heat by means of electrical resistance. Instead of utilizing the coil of wire so commonly seen in this country in heating elements, they stretch the wire, tape, or band, in a straight line between the terminals. These conductors are then incased in iron pipes, or flexible coverings, and carried through the rooms, offices, or workshops, in much the same manner as hot-water pipes. “WALKING BOOKS” ADVERTISE FREE PUBLIC LIBRARY The librarian of Stockton, Calif., re- cently hit upon a clever idea for increas- ing the popularity of the public library. A display sign, 4 by 2 ft. by 15 in., was made in the form of a book and was carried about town by a boy who walked inside the sign. Messages to the public, describing features of the library, were printed on the sides, back, and inside “pages” of the book, which bore imprinted on it the name “Anne Othority” as its author. This “Walking Book” Made of Sign Cloth Tacked on a Light Frame, is Carried about Town by a Boy, and Acquaints the People with the Attractive Features of the Free Public Library

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848 POPULAR MECHANICS ARC-WELDING MACHINE USES ALTERNATING CURRENT Welding, usually accomplished hereto- fore by the oxyacetylene method, or by the use of — bulky direct- current out fits, can now be done / with an al- ternating- \ current \—- yarn res La \ Arc-Welding Machine Which Uses Alternating Cur- rent, Showing the Contacts on Top for Obtaining the Different Controls That Yield Extreme Flexibility of Heat Range machine. This contrivance, the invention of three Kansas men, has incorporated in it an effective heat control, enabling 14 different temperatures, which are obtained by the stepping-down process, or in other words, with an induction coil. Voltages ranging from 100 to 110 are maintained, while the amperage is reduced from 170 to 30. Thus the practical value of the apparatus is apparent—that of producing heat at a workable point without affect- ing the voltage—and almost any kind of welding can be performed, owing to the extreme flexibility of heat range. ENGLAND-INDIA AND AUSTRALIA AIRSHIP SERVICE PROPOSED Plans are now being considered for the formation of a company to establish an airship service between England, India, and Australia. It is proposed to have a biweekly service to India, with a weekly extension to Australia, the service to be increased as necessity demands, The aim of the company would be a mail and pas- senger schedule of 5% days to Bombay, while the present trip takes 17 days. The time to Australia would be 11% days as against four to five weeks now required for the trip. The company would require no capital investment by the government, only a guarantee of interest. NEW HYDROELECTRIC STATION IN VALENCIA, SPAIN The second most important hydroelec- tric company in Spain has completed the construction of its station at Dos Aguas, which is the junction of the rivers Jucar and Gabriel, in the province of Valencia. When completed, the station will furnish 100,000 hp., and will greatly assist in sup- plementing the present inadequate power and light service of Madrid. SPECIAL PHONOGRAPH SENDS CONCERTS BY RADIO The fact that it is not always possible to employ expert musical talent for broad- casting wireless-telephone concerts has led to the development of a_ special phonograph for transmitting music. The tone chamber is larger than that of the ordinary phonograph and is supported on three posts which rest on a sound box similar to the body of a guitar. It is claimed that this machine is not only louder than the regular phonograph, but produces its tones more clearly and free from foreign vibrations, This Phonograph for Transmitting Wireless Music Has a Special Tone Chamber Resting on a Sound Box, and Produces Exceptionally Loud, Clear Tones, Free from Interfering Vibrations

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The “Well of the Apostles”: Obtained. The Primitive Method of Dipping Water from the Well in Jars Is Still in Vogue Here ITH the Jews to the ends of the earth deeply stirred by the fulfill- ment of prophecies which lead them to believe that the hour of the founding of their New Zion is about to strike, and with many of them actually planning a return to the land of their forefathers, the question of the potential ability of that land to support a greatly increased population at once arises. The political division called Syria, roughly comprising a 200-mile-wide strip of the country at the end of the Mediterranean, had an area of 130,050 square miles and an estimated population of 3,326,160. Approximately one-third of this area was included in Palestine proper, and rather less than one-fourth of the population. Can a semi- desert region of this kind, which was hardly more than self-supporting at its best, give sustenance to a population of five or ten times the 700,000 souls that eked out a precarious existence there be- fore the war? If not, the movement of any great number of people to Palestine, no matter by what motives impelled, would bring about an upsetting of the economic balance that could not but re- sult in a great addition to the world’s burden of suffering. It Is from Such Sources as This That the Present Water Supply of Palestine is While it is probable that the Biblical description of Canaan as a “land flowing with miik and honey” was largely due to the impression of a number of rich oases made upon the minds of a people who had journeyed long over barren sands, yet it is far from being today the barren desert that it seems to the casual visitor As a matter of fact, Palestine, which is in about the same latitude as southern California, has soil, topography, and cli- mate strikingly similar to those of this most fruitful region of North America Rich and fairly well watered coastal slopes, and deeply indented arid interior valleys, are common to both regions. In the matter of rainfall, Palestine, with its annual precipitation of from 20 to 25 in., is at a distinct advantage over southern California, which does not average much over 16 in. Probably this difference in rainfall is about offset by the fact that California, with higher and better for ested mountains, has far better natural storage areas than Palestine. There is no possible doubt that the Palestine of Biblical days, with a rainfall not greatly in excess of that of the pres- ent time, supported an almost exclusively agricultural population of many millions. 849

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850 POPULAR As there was nothing of the character of modern irrigation works ‘at that time, this must have been made possible by the fact that the country was well covered with trees, so that the rainfall, which now rushes off in savage floods with the ac- companiment of heavy erosive action, was stored in the earth. If almost complete deforestation was not brought about dur- ing the centuries of incessant warfare of earlier times, it must have come shortly after Turkish control was established. In no region long under the Star and Cres- cent have the trees survived in more than occasional groves and patches. Even Greece was almost completely denuded of its forests during the years it was governed by the Porte. Nevertheless, al- though Palestine is a man-made rather than a natural desert, the problem of its reclama- tion is a more difficult one than that of many great areas—like the Imperial Valley, in Cal- ifornia, for instance— which had never before known irrigation or cul- tivation. This is because there is no great river from which water can be diverted by a gravity flow, nor yet any readily available power which can be used in pumping. Neither coal nor oil MECHANICS such a project will be an engineering one —the construction of the necessary works at a reasonable cost. Given the power that can undoubtedly be developed through such an installation, the restora- tion of Palestine to a productiveness that will support a population of many mil- lions may be reckoned as an absolute cer- tainty. There are several extensive areas in the world that are below the level of the sea —notably in the western Sahara and the Colorado Desert of our own Southwest— but none where such a project as has now been put forward in Palestine could be advanced seriously. Yet, this boldest of modern engineering projects, unexampled _ though it is, is quite simple in its basic con- ceptions. A 37-mile tun- nel through compara- tively soft rock, a turbine installation to develop tens of thou- sands of horsepower, a transmission line to a great pumping plant 60 miles away, a couple of main canals to carry the lifted water, and the usual system of lat- erals and ditches—con- struct these at a cost that will not leave too heavy an interest charge against the land re- claimed, and Palestine can be made to provide are produced sufficiently This Old Donkey-Driven Grist Mill at Bei- “milk and honey,” to close a hand to make rut-Jibrin will Be Only a Curious Relic Say nothing oO rrain se at “sc : When the Dead Sea Hydroelectric Project y . = f g their use in pumping Makes Electric Power Available and fruit and sugar, for plants economically fea- sible, and the absence of perennial streams of sufficient gradient and volume precludes the possibility of hydroelectric power in that manner. Yet it is because some kind of power is indispensable to any extensive recla- mation in Palestine, that these normally prohibitive limitations have not been al- lowed to bar completely the door of the futur One source of power, though a hitherto untried one, still remains—the sea. I do not mean tidal power, for the Mediterranean is practically tideless; but rather the utilization of the difference in elevation between the surface of the great Middle Sea and that of the deeply sunk valley of the Jordan. As the Dead Sea is almost 1,300 ft. lower than the Mediter- ranean, and as the supply of water from the latter is inexhaustible, it follows that the principal problem in connection with a population vastly in excess of that ruled over even by King Solomon. Without it, any attempt to found a New Zion through greatly aug menting the present population of Pales tine would be almost certain to result in failure, if not in disaster. No one with the least interest in hydro electric development can ever have visited Palestine without remarking the power possibilities latent in the proximity of the Mediterranean to the Dead Sea de- pression, but the fact that the Turk was in control of the country put even a tentative study of the engineering side of such a project out of the question. The first time I ever heard it mentioned was in 1912, when a French engineer with whom I had crossed from Bagdad to Aleppo, pointed out the comparatively slight “divide” our train had surmounted in passing from the depression of the

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PCPULAR MECHANICS 851 Jordan, below the Sea of Galilee, to the It was doubtless the fact that the level of the Mediterranean at Haifa. He _ blighting rule of the Turk in Palestine is said he had often discussed with his col- over for good and all, that encouraged leagues of the DeMorgan archeological the eminent Norwegian engineer, Albert mission the excavation of a tunnel and Hjorth, to make a detailed study on the canal that would carry _ water from the Mediter- ranean to some _ point above the lower Jordan Valley, where a fall of a thousand feet or more could be obtained for a hydroelectric installation. lle was of the opinion that most of the canal could be made an open cut, but that highly ex- pensive aqueducts might be needed in maintaining the level across the deep wadies draining to the lower Jordan. The power generated, he said, could be distributed all over Palestine and used for pumping from wells now laboriously dipped from ne a The “Well of Jacob,” One of the Many Perennial Wells with Which Pal- by buckets, and, if the estine is Plentifully Supplied: Irrigation Canals will Bring Water to This thing were done in a big Country Where Water is Now Carried in Jars from Wells. In Localities > |. ° > Which cannot be Reached by Canals, Water will be Pumped from the Wells way, it might also be used for raising the water of the Sea of ground for a project of the character Galilee to the level of the fertile plains of suggested by my French companion. As Ksdraelon and Kishon, and perhaps on Mr. Hyorth’s plan calls for a tunnel from to the broad, rich plain of Sharon. “How- the Mediterranean directly under Jeru- ever,” he concluded, “no money couldever salem, I take it that his surveys have be found for such a project as long as the proved that such a bore would be prefer country is under Turkish rule; so why’ able to the more or less open, but much waste time talking about it?” longer, canal from a point near Haifa. a Fy" «eo ee 2 o m This View of a Section of the Damascus-Beirut Railway Gives an Idea of the Barren Aspect of th through Which It Passes. It is Proposed to Electrify This Road with Power Generated by Water Flowing from a Spring e Country

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852 POPULAR Doubtless the first thing an engineer would investigate in studying power de- velopment and irrigation for Palestine is the possibility of turning to advantage the fall of the Jordan between the foot of the Sea of Galilee and the head ot the Dead Sea. As the latter is 1,292 ft. below sea level and the former 682 ft., the Jordan will be seen to have a fall of 610 ft. in its sinuous course of 185 miles. As the river is very winding, a canal of something like 60 miles in length would suffice to carry water to a point above the head of the Dead Sea. Unfortunately, the valley of the Jordan itself is so restricted that the comparatively small area of land com- manded by such a canal, if built for irri- gation purposes only, would not warrant the expense of its construction. On the other hand, if built as a supply canal to a Construction Work Progressing on the Hydroelectric Power Flume Which will Carry Water from a Well That is Traditionally Believed to have Sprung from a Footprint of Abraham power plant, the diversion from the Sea of Galilee would be so considerable that not enough water would be left to pump to the rich plains above. I do not find this project mentioned in the Hjorth re- port, but I set down these limiting con- siderations here because, offhand, the idea of a gravity diversion for both power and irrigation from the Sea of Galilee seems not unfeasible. The tunnel would leave the Mediter- ranean in the vicinity of Jaffa, long the port of Jerusalem, and said to be built upon the cliffs where Andromeda, chained up to be devoured by a sea monster, was rescued by Perseus. It would strike at once into a chalk deposit of the upper cretaceous era, and its whole course, it is believed, would be through comparatively MECHANICS soft limestones and marls. As this is the easiest kind of excavating, it is hoped that the tunnel, in spite of its unprece- dented length, would not involve much more time in its construction than the short bores of Simplon and St. Gothard The size and the gradient of the tunnel are points that will be governed by the magnitude of the reclamation project— the area to which water will be pumped and distributed. Obviously, the greater the fall of the tunnel, the swifter the flow; and the swifter the flow, the smallet the diameter of the bore needed to pro- vide a given quantity of water. Also, the greater the fall, the greater the head that will have to be sacrificed at the Dead Sea end. Thus, a fall of 2!4 ft. to the mile would make a total drop in the 37 miles of 92% it., leaving an efficient head of about 1,200 ft. In tice, doubtless it will be found most economical to give the bore a much greater fall, allowing the increased volume of wa- ter to compensate for loss of head. Just where the most economical mean will be established wil! depend upon the power demand. Perhaps the first point upon which an engineer would seek assurance in considering a project of this kind is the extent to which the rise of the ba- sin into which water is discharged from the power plant would affect the efficient head. As the Dead Sea has no outlet, this, offhand, might seem to impose a serious limitation upon_the amount of water turned into it. For- tunately, in this instance, the difficulty is one which provides its own remedy. Prac- tically all of the water that flows to the Dead Sea is brought by the Jordan. But as the Sea of Galilee is but a collecting basin for the Jordan, any water pumped from the former for irrigation would reduce by just so much the flow of the latter into the Dead Sea. As it is probable that more water would be taken from the Sea of Galilee by pumping than would be added to the Dead Sea from the spillways of the hydroelectric plant, it follows that a fall rather than a rise in the surface of the latter is likely to take place. If this was considerable, it would, of course, mean that in time there would be a gain prac-

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POPULAR rather than a loss in efficient head, but even disregarding any reduction of the flow of the Jordan, Hjorth figures that the evaporation from the furnacelike heat beating upon the Dead Sea would just about take care of the additional salt water flowing into it. It is estimated that the. Dead Sea receives on an average of 6,500,000 tons of water a day, all of which (except its mineral content) is re- moved through evaporation. For one of his tunnels, Hjorth estimates a flow of 20 tons per second, or about 1,750,000 tons MECHANICS 853 nual flow, however, this can be readily effected by a dam at the foot of the lake to hold up the flood discharge of the rainy winter months and widen the stor- age area. Still further increase of water supply could be brought about by divert- ing the very considerable flow of the Yarmuk, which now empties into the Jor- dan some miles below the outlet of the Sea of Galilee, into the lake itself. Some further storage could also be effected by a dam at the Lake of Huleh, Hjorth’s plan calls for two main canals per day. For a short time this would at suitable levels, roughly paralleling the have the effect of raising the level of the _ general course of the Jordan. These Dead Sea a foot or more a year, But with increase of surface would come LAKE OF HULEH increase of evaporation, ~) Si SEA OF | and Hjorth figures that PLAINS OF GALILEE ‘ when the present 4,000 HAIFA ESDRAELON “or, L ie all ai AND KISHON Piven square miles of the sea a ann © would be increased to PUMPING PLANT oF raaMy 4.800, the heat of the sun would suck up an amount equal to the whole addi- tional flow, and that no further rise would take place. In any event, the danger of loss of head from a filling up of the Dead Sea is not one that need to be reckoned with. The Sea of Galilee is the principal collecting basin for the waters of the lower Jordan. It is 13 miles long, with its greatest width 714 miles. Its depth varies from 140 to 160 ft. Although its surface is 682 ft. below sea level, its waters are TRANSMISSION LINE DEAD SEA -1,292 FT. fresh, clear, and not heavily impregnated with minerals. They are not only free from alkaline or other salts that would render them dangerous for irrigation, but are even drinkable, being used by the inhabitants of Tiberias and the other vil- to the lages upon the banks of the lake. The main stream of the Jordan heads upon Mount Hermon, at an altitude of 1,705 ft. Besides the Sea of Galilee, its only other important collecting basin is the Lake of Huleh, 7 ft. above sea level. There are no accurate figures available on the discharge of the Sea of Galilee to the Jordan, but this is known to be suffi- cient for the irrigation of some hundreds of thousands of acres of land. Should it prove desirable to increase the mean an- This Map Shows the Proposed Location of the Tunnel for Carrying Water Power-Generating Station, and the Line, Pumping Plant, and the Three Levels of Irrigation Canals. The Figures under the Names of the Bodies of Water Indicate Their Situation above or Location of the Transmission below Sea Level would be supplied from the great pump- ing plant at the foot of the lake, and from them laterals would run to carry water to all of the extremely rich:land in the valley of the Jordan. This has never been accu- rately surveyed, but it is known to run to many thousands of acres. A third and much larger canal at a higher elevation would start at an altitude somewhat above sea level and run to the southwest. This would carry water to the tens of thou- sands of thirsty acres of the magnificent Plain of Esdraelon, and the equally rich if somewhat less extensive area of Kishon The final and nearer the Mediterranean.

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854 culminating step, in the event the installa- tion at the Dead Sea is made large enough to generate the necessary pumping power, would be to carry this canal to a point from which the great Plain of Sharon—the ancient granary of the He- The Principal Fall in a Stream Coming from a Spring: Electric Power is Generated from This Fall, and is at Present Utilized to Op- erate Street Cars, and Light the City af Damascus brews, Greeks, and Romans—could be commanded. The details of the project do not appear to have been worked out to a point where more than an approximation of the acre- age reclaimable has been arrived at, and this, of course, varies greatly according to the areas the water is carried to. If the plains of Esdraelon and Sharon are in- cluded in the scheme, this might well run to several hundred thousand acres. The water available from the Jordan drainage area is the limiting consideration, as the generation of enough power for pumping is merely dependent upon the size of the tunnel from the Mediterranean. Searcely less important in the long run than the Sea of Galilee project in restor- ing Palestine to fruitfulness, will be the utilization of a part of the power from the Dead Sea hydroelectric plant for pumping from wells. A land with so many perennial springs and wells as this can hardly fail to be underlaid with inex- haustible reservoirs of water that can be tapped by deep boring. There has never been an attempt to develop artesian water in Palestine, although the formation is such that it is more than probable that flowing wells would be brought in at no very considerable depth. But with cheap power, even good pumping wells would make possible the irrigation of many rich POPULAR MECHANICS wadies and plains in the south and west of the country that cannot hope to be brought within any extensions of the Sea of Galilee project. Some of the best paying crops in California, Algeria, and India are raised by water pumped from . wells under conditions no more favorable than those which should ob- tain in Palestine for this kind of farming. Other uses to which Hjorth suggests putting the power from his Dead Sea plant are the pro- duction of fertilizer with nitrogen from the air, the exploitation of the vast deposits of asphalt, and for extensive works for the manufacture of salt from the sea water dis- charged at the spillways. All of these projects would dovetail effectively with the general scheme of restoration. Inno place in the world have lands been tilled longer than in Palestine, Cropped to the point of exhaustion as certain areas are, the cheap and con- venient fertilizer from the nitrate plant would be of the greatest help in bringing them back to full fruitfulness once water is available. The exploitation of the asphalt deposits, besides being an im- portant industry in itself, may, as in Trin- idad, bring the discovery of oil in its wake; and nothing could more effectively supplement cheap electrical power in Pal- estine than cheap fuel. The advantages offered for the cheap and expeditious manufacture of salt promise to be more favorable than those enjoyed by any other spot in the world. The plan is to construct a _ horizontal canal which would take the brine dis- charged from the turbines and distribute it in a thin film over the broad expanses of sun-baked rocks bordering the Dead Sea. Evaporation would be almost as fast as in an oven. The residue could be col- lected for refinement as often as the in- crustation on the rocks demands. A comprehensive system of reforesta- tion, carried out concurrently with the construction of the power and irrigation works, would in time act to conserve the by no means inconsiderable rainfall of the country, and ultimately make it pos- sible to raise crops by irrigation from the augmented flow of streams long dry.

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POPULAR MECHANICS 855 MOTOR BUSSES ON RAILS REPLACE STREET ——s YY) = eM” Te x This Bus is Operated by the Street- Car Company on the Highway and is Used as a Feeder for the Interurban Line. It Runs on Schedule Time and Makes Connections with the Busses That Use the Rails When the “jitneys” and motor busses and rubber tires. The cars operate on first made their appearance, the street-car schedule time and have given complete companies were their most bitter critics, satisfaction, both to the company and to but now they have adopted them for their passengers. The cars drive on all four own use as a means of reducing costs wheels and negotiate heavy grades with and furnishing better service. At Man- ease, even under adverse weather condi- hattan, Kan., they are used not only for tions, while, because of their lighter interurban service but on the city streets weight, the maintenance costs for cars is well. Special bodies were fitted on and track are considerably reduced. They standard truck chassis, and steel wheels are said to operate more quietly than the were substituted for the wooden wheels _ street cars formerly used. These Motor Busses Operate on the Street Railway Sane and .Replace the Electric Cars. The Special Bodies were Built on Standard Chassis, and Flanged Steel Wheels Replace the Wooden Wheels and Rubber Tires

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POPULAR MECHANICS CONTROL “GOLIATH” AIRPLANE WITH AUTOMATIC PILOT That the automatic stabilizer is des- tined to play an important part in control- ling an airplane when flying through fog, is forecast by a recent test carried out in France. A Farman “Goliath” airplane, equipped with the same form of stabilizer that was used in making a flight across the English Channel some time ago, rose from the flying field through 4,500 ft. of dense fog into clear air above. After making several turns at this altitude, the engines were throttled down and the au- tomatic stabilizer brought the airplane down in safety to within 150 ft. of the ground without help from the pilot. SELF-HEATING SOLDER IRON WITHOUT VALVE OR PUMP Combined blowtorches and _ soldering irons, the latter being therefore self-heat- ing, have been made in various forms, but seldom without a pump to obtain air pressure. A pumpless and valveless blow- torch is made possible by the use of de- ~ 857 natured alcohol in a very handy self- heating soldering iron now on the market. Inside its handle is a tube, the lower part of which is the reservoir for the alcohol, while the upper part is filled with asbestos Above: Combined Blow- torch and Soldering Iron. Below: Handle Cut Away to Show Construction. Right: | rq Solder-Meiting Pot packing. Just above the handle is a prim- ing cup in which a small quantity of alcohol is burned, furnishing enough heat to generate gas under constant pressure in the handle. This gas blows through a pinhole into the burner part of the tool, onto the end of which is screwed the soldering point. Once started, the process is continuous until all the alcohol is con- sumed. POWERFUL STEAM TRACTOR HAS TWO ENGINES Two engines are built on a powerful oil-burning steam tractor, which has been designed for universal use, although con- sidered especially adapted for the lumber industry. During the summer, two ordi- nary steel wheels in front andtwo track-laying wheels at the rear are used, while in the winter the front wheels are exchanged for sled runners. The implement is rated at a load capacity of 10 tons, has a speed of six miles an hour, weighs 8% tons, and its wheel- base is 126 in. The two engines develop 30 hp. each, and are mounted, one on either side, midway between the front and rear of the machine. for Use in the Lumber Industry of the North: Steam Tractor Which is Equipped with Two Engines, One on Each Side, and Which was Specially Designed In the Winter, the Two Front Wheels are Replaced with Sled Runners

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858 AUTO SERVING TABLE STANDS ON RUNNING BOARD Placed on the running board of any automobile, a new serving table can be quickly set up for the convenience of the OPYRIGHT, UNDERWOOD & UNDERWOOD This Gives an Idea of the Convenience of the New Auto Serving Table Which, When Not in Use, can be Folded and Occupies Little Space in the Car hungry motorist. Lunches or refresh- ments can also be served on it at picnics or outings, and when not in use the table can be compactly folded so that it occu pies very little space in the car. The con- struction is simple, and such that the table can be adapted to different cars. POPULAR MECHANICS OLD CAPITOL AT WASHINGTON GIVEN TO WOMAN'S PARTY Standing on a terrace, surrounded by huge shade trees, and within distant view of the great dome of the present Capitol, at Washington, is the old Capitol, in which President Monroe was inaugurated in 1817, and where congress sat from 1815 to 1819. The old Capitol has been divided into three houses, and these are to be remodeled into one great mansion imme diately following its rededication, on May 21, with much elaborate ceremony, to the ise of the National Woman’s Party. This has been made possible through the gen erosity of a member, who gave the $146,000 necessary for the purchase and recon truction of the building. With the dedi cation of their new national headquarters the formal inauguration of the Woman’s Party will be celebrated. PRIZE CONTEST IN BED MAKING FOR HOTEL CHAMBERMAIDS Of new efficiency contests there seems to be no end. Introduced at a fashionabk California hotel for the amusement of winter tourists, the chambermaids’ bed making competition apparently takes first place for novelty. Lining up eight beds on the lawn of the hotel, the maids started at a given signal to make the beds assigned to them. Prizes were given not only for speed, but for the best-appearing bed, the neatest bed, the most securely tucked bed, and for a number of other points of perfection. A cup was later awarded the best of the bed makers, and she was declared California’s champion in that event. Left: The Novel Bed-Making Contest in Progress, with the Eight Beds of the Contestants Lined Up on the Lawn of the Hotel. Right: Awarding the Cup to the Champion Bed Maker; Prizes were Given Also to Some of the Other Competitors

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POPULAR MECHANICS 859 OPY RIGHT, ROTHACKER FILM CO. “Talking Pictures” in the Making: In the Center Is the Noted Actor, Frank Bacon, Delivering a Speech. At the Left Are the Camera Man, Promoter, and Director, Taking Down “TALKING PICTURES” MADE WITH AID OF RADIO “Talking pictures” have been demon- strated as a practical possibility by Chi- cago men, who adopted the synchroniza tion of radio and the motion-picture machine as the basis for their experi- ments. An ordinary picture is first en- acted, then duplicates of this film are made and distributed to numerous the aters. The actors and actresses now re- pair to a radio-broadcasting station, where the original picture is thrown on a screen before them. As the story unfolds on the screen, the assembled cast again speak their parts, simultaneously with the action of the film. The projection machine in the station controls the starting and the operating speed of the machines in the theaters, so that, as the voices are broad- cast, the different audiences are enter- tained with a synchronous blending of both action and sound, all of which makes the picture seem almost lifelike. the Words of Bacon So That He can Later While at the Right Is a Stenographer Who is Repeat the Identically Same Speech MANHOLE AND STREET DRAIN IN COMBINATION INLET Combining a manhole cover and a street drain in one casting, is the result attained by a recent invention. The drain installed in a bed of con- crete, with the top of the drain hole on a level with the top of the curb. The cover is fitted securely into the manhole opening with a bar, which locks it in place. is @ “Radio with your shine,” is the motto of a western bootblack who has installed a radiophone, together with a large sound magnifier, in his stand. Customers drop ping in for the daily polish are entertained with broadcast concerts and news from a radius of 4,000 miles

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860 POPULAR MECHANICS MITER-SCRIBING INSTRUMENT COPPER-SULPHATE WATER IS FOR IRREGULAR SURFACES TIMBER PRESERVATIVE An ingenious patented device makes it In some of the western mines the water as easy to scribe a miter on a surface that is pumped from the mine contains a with irregular and curved contours as considerable amount of copper sulphate, and experiments have shown that this acts aS a preservative in protecting the mine timbers against decay. Timbers which have been allowed to soak in this mine water for two or three weeks, some times outlast three sets of untreated tim- bers. AUTOMATIC AERIAL CONVEYOR FOR SHINGLE BOLTS \mong the cedars of a mountainous locality in British Columbia, the engi- neers, in connection with a shingle mill, have built an ingenious conveyor for the shingle bolts, or bundles, that is entirely automatic. The conveyor has a length of three-fourths of a mile, and there is a difference of 900 ft. in elevation between the heading where the bolts are loaded onto carriers and the terminal where they are automatically dumped on a plat- form, for reloading in railroad cars. Be- tween these two points are stretched aerial cables, on which the carriers run with trolleys. The loaded carrier is auto- _ i eT ~ GS matically locked to the haul-back cable, co peggy Magy Rage ell Rs gy nay = and in descending, its accumulated mo- Used for Laying Out Slopes at Any Required Angle mentum 1s sufhcient to return an un- on a flat surface. The instrument will be loaded ascending carrier, and also to run particularly useful to tinners, and fitters “ small electric-lighting plant. of eaves troughs, and for scribing miters juan on gutters. It will also be useful to wood workers, particularly to cabinet and pat- tern makers. In addition to. scribing miters, the instrument can, of course, like any other of its type, be used for laying out slopes at any required angle, or as a simple straightedge. Automatic .Aerial Conveyor with a Carrier Loaded with Shingle Bolts, Shown Descending and, by Force of Gravity, Driving Upward an Unloaded Carrier, as Indicated by Arrows: In Foreground Is the Dumping Platform for Reloading onto Railroad Cars. Insert Shows a Loaded Carrier Leaving the Heading

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POPULAR MECHANICS 861 LONDON’S MIGHTY MIDNIGHT MOTOR STREET WASHER FoR many years, every night as the clock strikes twelve, every street in the West End of London, England, has been flooded and scoured with water. Formerly this was done with hose and sprinklers. Now it is being done with a motor street washer that has sprinklers mounted on the front of the powerful car, which throw the water in great streams to a distance of from 25 to 50 ft. The machine can be used also as a first-aid fire engine, as it will throw a jet of 175 gal. at 100-Ib. pressure. The illustration—a night view—shows the machine operating as a street washer. MACHINE PLOWS AND HARROWS _—» 7a SOIL IN ONE OPERATION \ harrow is now being manufactured which, the makers claim, does the work of the ordinary plow and the disk har- row in one operation. In place of disks it has knives, which cut and pulverize the vil to a depth of six or seven inches. hese knives are shaped like boat pro- pellers, which gives a rolling effect and leaves the ground well plowed but smooth and even on the surface, so that a single trip with the machine over a field will give sufficient prep- aration for seeding. @ According to recent announcement, the Japa- nese are producing, from the inner bark of the mitsumata plant, a good grade of vegetable leather which is said to be al- most as tough as the so- Above: Bottom View of the Harrow Resting on Its Skids, Ready to be ~ r Moved to the Next Field. Below: In: Operation, the Propeller- called French kid. Shaped Blades Cut and Turn the Soil, and Leave a Smooth Surface

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862 POPULAR CARRIER FOR SHIPPING EGGS STANDS ROUGH HANDLING Because of the enormous loss occa- sioned in shipping eggs, the problem of a In This Egg Carrier, the Diagonal Strips of Cardboard inside the Rectangular Openings Form Flexible, Individual Protecting Pockets for the Eggs design of an efficient carrier is a fertile field for research. As hens do not work to any standard, the carrier must have a certain amount of flexibility, and yet be rigid enough to protect the fragile con- tents. Ina recently patented carrier, diag onal strips of cardboard, placed inside the usual rectangular openings, hold the eggs in individual pockets which are protected from the shocks received in shipment. AUTO ELABORATELY EQUIPPED FOR CAMP AND OUTING USE Elaborate equipment has been installed in a motor-car camping outfit designed and built for a Philadelphia man. The body of the car has wide doors fitted with locks, and all the windows are operated MECHANICS by a mechanical locking arrangement. The interior is finished in gray art leather, and has folding, or removable, seats for day use, while at night four canvas ham- mocks can be swung. Inside the machine, at the rear, is a marine-type cookstove with burnished sheet-aluminum paneling around it, and which has a copper fuel tank. Numerous shelves, brackets, and compartments are provided for lantern, vacuum bottles and jars, sugar, spice, tea, and eoffee containers, and other outing necessities. SANITARY PAPER FLY TRAPS MADE ORNAMENTAL Sanitary on account of its effectiveness, and not unsightly, is a newly patented paper fly trap. — It is collaps- ible on a dished base so that it is con- venient for storage or shipment. It made of decorative pa- per, and it ex- pands into a cage, ornae- mentally shaped, with a conical top of lighter color than the bot- tom, as to attract the flies upward. is so The flies enter the trap through small openings at the base, whither they are attracted by tempt ing food. The trap may be suspended from the top or stood upon its base. Motor-Car Camping Outfit: Left, Exterior of the Specially Designed Machine, Showing the Wide Doors and Numerous Windows, Right, Interior, Showing Cookstove, Vacuum Bottles and Jars, and Other Equipment

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POPULAR MECHANICS This Special Locomotive, Used in Connection with the Plans for the Ascent of Mount Everest, Is Remarkable for the Small Diameter of Its Driving Wheels and Its Short Wheelbase, and Also for the Fact That the Fire Box is Made of Copper LOCOMOTIVES OF STRANGE TYPE IN HIMALAYA MOUNTAINS Special locomotives made in America have played a highly important part in the plans of the British expedition to ascend the world’s highest mountain peak, Mount Everest. To reach the present headquarters, the expedition’s materials and supplies were conveyed over the Darjeeling-Himalayan Railway, on which several of these special mountain-climb- ing locomotives have been placed in op- eration. These locomotives were built to the individual specifications of the railway company. They were designed to with- stand the severest strains. One peculiar feature is the copper fire box; another, the small driving wheels, having an out- side diameter of 26 in. The wheelbase is only 5 ft. 6 in. Soft coal is used for fuel, the fuel capacity of the tender being 1,680 Ib. The total weight of the engine is 36,250 pounds. ' CHEMICAL PROCESS CONVERTS SAWDUST TO CATTLE FOOD A chemical process for converting saw- dust of the soft woods into a carbohydrate food for dairy cattle is-now being devel- oped at the Forest Products laboratory, at Madison, Wis. Preliminary manufac- turing and feeding tests indicate the suc- cess of the process. This would mean turning much of this waste product into profit. TAX-COMPUTING MACHINE HAS CHART FOR ANY TAX RATE Tax calculation is made easy by the use of a simple computing device in connec tion with specially designed charts. With the turn of a small handwheel it shows instantly, through a slot for the purpose, the correct amount of tax, or any other valuation, on sums of money from $10 to $10,090. The charts are figured for dif ferent millage from 4 to 35 mills. All that is necessary is to put the chart for the required mill rate in the machine, and turn the handwheel until the amount to State, County. City, Boro. and School Tax at £5) Mill Rate . . Computing Machine for Telling Instantly the Correct Amount of Tax at Any Rate, from 4 to 35 Mills, for Each of Which a Special Chart has to be Placed in the Machine be valued reaches the left-hand end of the slot. Opposite that will be displayed the required valuation, or taxation. It not only time and labor, but eliminates the human liability to errot saves also

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S6 | POPULAR SALUTATIONS IN LETTERS WITH METAL LABELS A very snappy salutation in connection with a letter is conveyed by means of a thin metal label, 1 We ~ YY in. square, with the S word “Greetings embossed on it in bright gold let- ters. This is at- tached to one corner of the pa- per, and is held there by two small y S Wt, ~ Pw triangular catches bent against it. The greeting is good all the year round, and is used by business concerns to take the chill off formal letters.

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Va MECHANICS

BLUE COTTON NOW BLEACHED TO INCREASE ITS VALUE Cotton growers and manufacturers will be interested to learn that a method has been discovered whereby the bleaching of blue-bender, blue-Texas, or blue-stain cotton, is a practical possibility. The re demption of this product, heretofore cheapened because of its color, is ex pected to prove a boon to planters all over the world. @ As a means of visualizing the methods of manufacture of American machinery and products, and their use, motion-pic ture films are to be made by the Bureau of Commerce in cooperation with the Bureau of Mines. The films will be dis- tributed in this country and abroad TRACTOR-DRAWN BRUSH PLOW FOR LAND CLEARING Breaking down and burying dense brush growths under the furrow slice may seem impossible, but this feat is suc- cessfully performed by a recently invented brush plow, which is drawn by a power- growing brush, and small trees up to 15 ft. in height and 3 to 4 in. in diameter covering the whole *with earth. Land- clearing experts, judging from lately con ducted tests, expect that the new plow will revolutionize pres

The High-Arched Beam of This Original Brush Plow was Hewn from the Trunk of an Oak and Reinforced with Iron Bands ful tractor. The plow has an arched beam that increases the clearance from the ground 8 in. over that of the ordinary implement, and enables it to bury in the furrow standing brush of any size that the tractor is able to override. It is claimed that the outfit will actually break down ent-day methods. Un doubtedly, it will greatly speed up the work of clearing brush-covered land, and prove invalu able to settlers engaged in this labor. The de- velopment of the plow is the last the mechanical of cut-over land. brush step in clearing The Tractor-Drawn Brush Plow in Operation: Because of the Extra-Large Clearance in the Throat, the Brush Plow can Turn Under Any Stand- ing Growth That the Tractor Is Able to Override

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TERRIFIC BOILER EXPLOSION ON LARGE FERRYBOAT The boiler of a ferryboat that plied be- tween Port Huron, Mich., and Sarnia, POPULAR MECHANICS 865 SIMPLE CAMERA ATTACHMENT FOR STEREOSCOPIC VIEWS The amateur photographer who has taken pictures and later been disappointed Wreck of the Ferryboat After Its Boiler Exploded: In the Back- ground Is the House upon Which the Shell of the Boiler Landed Ont., burst with terrific force on March 26, last, while the boat was lying in the Black River. The shell of the boiler -was hurled 100 ft., and landed on a house, which was completely destroyed, the red-hot coal in the fire box igniting. the neigh- boring houses; and caus- ing much damage. The hull of the ferry- boat was torn. to pieces, and the fireman and engineer were buried in the wreck- age. Two deckhands were hurled 25 ft. to their déath, and besides these four men killed, there were 17 persons injured. DRIVE RADIO GENERATOR WITH SINGLE-BLADE PROPELLER In the effort to eliminate head resist- ance and produce a clearer and more constant tone for radio transmission from airplanes, a generator driven by a single-blade propeller has been tested. This gener- ator is carried ‘on a special mount- ing on the side of the fuselage, and preliminary trials indicate that bet- ter results may be had with this style than with the older styles of generators. View of the Shattered Hull of the Ferryboat Lying in the Black River, Michi- gan, Showing How Completely It was Wrecked When Its Boiler Exploded by the flat appearance of the prints, can now arrange to take stereoscopic views with his regular camera. A simple attach- ment can be fitted on the tripod which holds the camera in correct positions for This Simple Attachment, Fastened on the Tripod, Makes It Possible to Take Stereoscopic Views with the Regular Camera taking the two views of the object neces- sary for producing stereoscopic pictures. @ Recently a musical program, played on a phonograph at the Canadian wireless station at High River, Alta., was heard by a station on Maui Island 100 miles from Honolulu, or about 2,800 miles from the sending station.

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SHREVEPORT CHURCH HAS MANY UNUSUAL FEATURES By ARCHIE RICHARDSON RADIO broadcasting station with a coast-to-coast radius and a 10-story tower are novel features of the First Bap- tist Church of Shreveport, La., erected at a cost of $500,000, and used for the first time Sunday, April 9. The struc- ture, uniting a main building of four = Y —= ECHO Bt ORGAN "a> Oe ee Ea carillon of 13 bells, and the connecting rooms of the main building provide for a Sunday school of 3,000. A roof garden has accommodations for 1,000, and will be used for regular services, concerts, and social meetings in the summer. There is also a banquet room that seats 500 at two GENERATOR: Section through the 2.2. @..& Third-Floor Plan of — Church Building, Show- ing Arrangement of Spe- i cial Rooms for Classes, and Auditorium with a TOWER Seating Capacity of 2,500 to 3,000 Persons Church Building, Showing Wires Leading from the Pulpit to the Radio Gen- erator on the Eighth Floor of the Tower and Thence floors and the 10- Story tower, con- tains 51,000 sq. ft. of floor space, and accommodates 7,000 persons. The main audito- rium has a seating capacity of 2,500 to 3,000, and is equipped with a four-manual organ, echo set, and chime connection for special music features. Even the deaf are provided for in this church, for a ‘so-called acousticon has been installed in the pulpit and connected with the pews by concealed wires. The tower, on the ninth floor of which is installed a with t RH This Roof Garden, with a Seating Capacity of 1,000 Persons, will be Used in Summer for C certs and Social Meetings to the Antenna tables, and a nursery in the base- ment is provided with sand piles and, under supervision cares for children of mothers who are attending serv ices, or who are oc cupied during the week. The dining rooms of the church furnish noon lunches to several hundred working girls daily, besides serving banquets ~— several times a week. ‘Situated almost in the heart of Shreveport’s business dis trict, the tower dominates the city’s sky line.

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POPULAR MECHANICS =—{s}— {S— 4 a “i atid Above: This Church in Shreveport, Louisi- a {ar ana, Is Four Stories High, with a 10-Story = —S Tower, Seen in the Center Background. Below: Close-Up of the Tower; a Wireless Antenna will Reach from This Tower to a Steel Tower to be Erected at the Right, and will be Used for Broadcasting Sermons to Smaller Churches in the Surrounding Country Many small churches throughout the neighboring section have in- stalled receiving outfits to take ad- vantage of the offerings of the Shreveport church. Several of them have no pastor, and are able to have sermons only one or two Sundays a month, but radio has now made it possible for them to enjoy the same opportunities offered members of city churches. The management of this church consists, besides the pastor, of a staff of 10 supervisors.

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POPULAR WOODEN LEG FOR ELEPHANT AS ADDED ATTRACTION An elephant having a wooden leg would be a-rare and curious sight, at least so Wooden Leg Which is Fastened to the “Knee” of the Elephant in Preparation for the Gaze of Curiosity Seekers thought the proprietor of a small recently, when he had a peg constructed for one of these huge animals. The peg, solidly fashioned of 4-in. oak, has a metal Cap at the top for the insertion of the ele- phant’s “knee.” With this makeshift limb —only worn during the day—the behe moth hobbles around, much to the won- derment of the spectators, and the result ant free advertising incidentally yields lucrative financial returns to the owner circus, VENTILATION OF MACHINERY INCREASES EFFICIENCY Investigations covering many different kinds of machines, especially electrical machinery, have shown conclusively that machines need constant ventilation to ren- der them more efficient. Rotating machin- ery, or machines which have a large number of smaller working parts, such as printing machinery, textile, paper, and grinding machinery, and practically all electrical units, need moving air about them to carry away fine dusts and fumes that, sooner or later, raise havoc with the moving parts of the machine. Excess heat and static charges of electricity are practically eliminated by currents of mov- ing air, particularly if the air is properly conditioned, or moistened, before being passed over and about the machine. While MECHANICS lack of ventilation shows scarcely notice- able effects in short periods of observa- tion or tests, in the long run they may become very injurious. Therefore, exten sive studies are often made, taking into consideration even such things as the direction of rotation of all moving parts of the machine, with a view of design- ing and arranging types of blowers that will properly ventilate the machine. OVERHEATED AIR COMPRESSOR STOPPED BY FUSIBLE PLUG Fusible plugs are being used in South Africa to protect air compressors, and pipe lines in connection with them, from excessive heat in the air, with accompany- ing formation of dangerous pressures. When the plug fuses it releases by means of a valve the overheated air from the mains, and at the same time acts on an other valve that shuts off the steam sup ply to the compressor engine. To restart the compressor, a new fusible plug is in- serted, and the valves are reseated. Com- pressed-air systems in South Africa are likely to suffer from overheating on ac count of the almost constant high atmos pheric temperatures. NEAT CONTAINER FOR SENDING TOKENS OF FRIENDSHIP Instead of sending candy and flowers in separate packages, it is now possible to combine these tokens of affection in one attractive package. A container has been devised with space at the top for candy, an individual flower holder and water compartment in the center, and a division COLLAPSIBLE PERFORATED AREA FOR FLOWERS This Novel Gift Holder Provides Spaces for Candy and Fruit, and a Flower Holder with Water Container Below for fruit at the bottom. A card at the top, bearing an appropriate sentiment, completes the assembly.

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POPULAR MECHANICS A Fare A Me i , We bg ei Fo Scaffold for Painting the Large Dome in a San Francisco Department Store: Its Boom That can be Swung Around, Raised or At the Left It is Suspended with owered, and Lengthened or Shortened. At the Right Is a Close-Up of the Painter’s Seat CLEVER METHOD OF PAINTING INTERIOR OF LARGE DOME Over the main part of one of San Fran- biggest department stores is a large dome, and the building superintend- ent of the store has devised a very in- genious scaffold to facilitate the painting and cleaning of it. Suspended from the center of the peak to about the level of the bottom of the dome is a steel cable, which is rigidly braced by four guy ropes. Pivoted at the bottom of this cable is a long derrick boom, from the end of which is slung a comfortable seat for the painter. This boom can be swung around the dome, raised or lowered, and lengthened or shortened, so that any part of the face of the dome is easily accessible. cisco’s TWO LONDON-PARIS AIR-ROUTE PLANES COLLIDE AND FALL On April 7, two airplanes flying in pas- senger service between London and Paris, collided in mid-air about 70 miles north of Paris and fell in flames, with a loss of six lives—three passengers, two pilots, and a mechanic. The crash was due pri- marily to the fog, as the pilots were unable to see each other until too late to avoid collision. The planes were flying at an elevation of about 400 ft. when the crash occurred. This air route has been in operation since 1919, and has been re- markably free from accidents, considering the large number of passengers carried, as this is only the second fatal accident. The other occurred when a plane, in taking off, struck a tree. CORRUGATED RUBBER TUBES FOR AUTOMOBILE TIRES Corrugated red-rubber tubes for auto- mobile tires are the latest addition to the field of motoring, and are the offering of a New York inventor. The purpose of the corrugations is to prevent overheating, sticking, and pinching of the tube within the tire. The innovation is also claimed Corrugated Red-Rubber Tube Inflated and Ready for Use in a Tire: Insert Shows a Cross Section of the Corrugated Tube, Dis- playing the Thickness of the Rubber — \ to aid the vulcanizing process, and to in- crease the life and elasticity of the rubber.

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870 POPULAR COMMERCIAL FLYING SERVICE STARTS IN CALIFORNIA A passenger air route has been estab- lished between Los Angeles and San MECHANICS USE OF PHONOGRAPH TO MAKE MOVING PICTURES AUDIBLE The use of the phonograph in connec- tion with moving pictures to make the actor’s speech audible has q been tried for some time, but never with very satis- factory results. A demon- stration was recently given in England of a newly invented apparatus which electrically syn- chronizes the lip move ments of the actors on Above: Francisco, Calif., and two regular trips will be made each day. Flying time between the two cities will be five hours, with a stop at some central point for luncheon and rest. The single-trip fare is $50, and the distance approximately 400 miles. @A portable radiographic installation has been set up on Flores Island, near Monte- video, Uruguay. It is to replace the sub- marine telegraph which has hitherto con- nected the island with the mainland. Five of the Airplanes That Made the Flight When the Service was Inaugurated. Below: A Close-Up of One of the Planes That Carries Four Passengers and Pilot the screen with the sounds emitted by the phonograph. That part of the problem was solved perfectly, but there still remained the character- istic defects of the pho- nograph, such as_ the scraping of the needle, and occasional harshness or indistinctness of the voice. These defects were enhanced by the ampli- fier horns, which were indispensable in spread- ing the sound over a large auditorium. If these shortcomings can be remedied, and clearness of enunciation, together with tonal volume, can be obtained, the perfect synchronization of the new ap- paratus should make audible moving pic- tures a practical success. FOLDING BED FOR TOURISTS FITS REAR AUTO SEAT When touring by automobile, it is essential that all available space should be utilized to the greatest possible ad- With this in view, a bed has folded, vantage. been constructed which, when the Left. Folding Bed Frame, So Made That a Collapsible Tent Frame can be Attached to the Four Corner Posts, as Shown at When Folded, the Bed Frame Takes the Place of the Rear-Seat Springs

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POPULAR takes the place of the springs in the rear seat, while the mattress and bedding can be used as a cushion. When the bed frame is extended for sleeping, a folding tent frame can be attached to the four corner posts of the bed, making a service- able shelter in case of rain. In this way the tourist is assured of a.comfortable bed at night, and also makes good use of the space in the rear seat by day. IMPROVED AUTOMOBILE TIMER HAS ONLY TWO WIRES On a certain popular light automobile the standard timer in connection with the motor has four wires, two of which, being next to the fan belt, are soon damaged by it. In order to avoid this, a new timer has been brought out that has only two wires on the side that is away from the belt. Another improvement in this new timer is extreme simplicity, there being only one moving part. Further- more, the contact maker revolves with the The revolving and stationary made of camshaft. contacts are copper, and the Outside and Inside Views of New Timer with Only Two Wires, to Replace, on a Popular Light Automo- bile, the Standard Timer Which Has Four Wires, Two of Which are Easily Damaged by the Fan Belt brush holders are of brass. All these parts are inclosed in a bakelite case that is per- fectly nonconducting, and is rust and moisture-proof. LOUD-SPEAKING REPRODUCER FOR DICTAPHONE RECORDS A new dictaphone reproducer has been invented, which is claimed to be far superior to present instruments of its class. In place of the usual sound box, there is a small device containing an armature held between the poles of a magnet, and the grooves in the record impart the vibrations to this armature and set up electric currents, as in the MECHANICS Sil ordinary dynamo. The volume of sound can be altered by shifting a small lever, and increased to such a degree, it is This Dictaphone Reproducer Makes It Possible to Se- cure a More Accurate Control of the Volume of Sound claimed, that head receivers are not nec- essary. This tone-control feature has spe- cial appeal where many persons dictate on the same cylinder. ORDINARY SEAL HAND PRESS MADE INTO FOOT PRESS Converting ordinary hand presses of any size, such as are used to emboss cor- porate seals on stock cer- tificates, bonds, or other docu- ments, into a foot press, has been made possible by an eastern inventor. With his ma- chine, this is accomplished without drill- ing any holes, removing the dies, or in any way altering the hand presses which are quickly in- serted, or taken from the outfit to be replaced with a different seal. The apparatus is of rugged and simple con- struction and requires but little more than one square foot of floor space.

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872 POPULAR MECHANICS WORK ON CANADIAN DRYDOCK ORDERED ABANDONED It is not often that a work of the mag- nitude of the drydock which was being built at Esquimalt, B. C., by the Cana- dian government, is abandoned in an incomplete condition. Work had been in progress on this contract for over a year and more than $1,125,000 had been spent, Fs when peremptory notice was received from the authorities by the contractors, : ordering immediate cessation of work. Although rumors had been afloat for ; some time that a temporary shut-down ~ might be ordered, pending an investiga- tion by the new government as to the advisability and necessity of this work, the order to quit came as a complete sur- prise to all parties concerned, couched as it was in such terms as to leave the inference that abandonment was intended. In the 12 months since construction commenced, 160,000 cu. yd. of rock were excavated, and over 100,000 cu. yd. of material dredged from the approaches to the dock site. Several large timber cribs, intended for portions of the permanent work, were also constructed and in proc- ess of receiving their filling of concrete, preparatory to being sunk into position. As to the cause of the abandonment order, nothing definite is known, although it is thought that the outcome of the disarmament conference at Washington, together with the Japanese treaty arrange- ments, probably have a good deal to do with it. Esquimalt has for many years been the most important British naval station on the Pacific coast. “ee The Wide British We Ry Ge 110 Feet ® he Long and 1,100 Feet TREES GROW FROM STONE BAGS USED AS FLOOD PROTECTION In protecting the embankment of a railroad in Chile that was in danger of being washed away by flooded streams, wire bags filled with cobblestones and small bowlders were used extensively. In placing the stones in the heavy, galvan- ized-wire bags, many willow sticks were forced in among the meshes of the wire. The bags were placed end to end along the river’s edge for several miles. Som«c time later it was observed that the willow sticks had taken root among the rocks and were growing rapidly. Accumulating sediment from the river aided the growth until finally a most desirable hedge of young willow trees still further aided in keeping the waters of the river from en croaching on the roadbed. Columbia, Work on Which was Stopped by the Government: have Been General View of the Uncompleted Drydock at Esquimalt, Dock was to

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a Wing- ‘Type | Ditcher at Work on a Railroad: The Wing or Scraper Attached to the aes Car, Which is Moved by a Locomotive on the Track, is Adjusted to Give the Desired Section to the Ditch at the Side of the Roadbed. The Wing Cuts the Soil and Shoves It Ahead DITCHING MACHINE DOES WORK OF MANY MEN N the great work of extending and maintaining America’s railway sys- tems, the ditching machine plays a prom- inent part. Recent improvements have made the present-day ditching machine a wonder worker in changing the appear- ance of a railroad’s right of way. When it is considered that a modern machine can do as much work in a day as a gang of 200 section hands, it is apparent that such a machine must rep- resent real construction economy. The wing type of rail- way ditcher has been de- veloped from the old-type spreader car. A heavy car is equipped with a scraper blade, or wing, that is shaped to con- form to the standard sec tion of the ditch and roadbed shoulder. This blade cuts the soil and shoves it ahead until it can be thrown clear of the roadbed. A _ larger type of machine has wings on both sides and can thus clean the two ditches at the same time. In operating the ma- chine, it is often neces- sary to make three or four runs through the cut, depending on the nature of the soil. On the last run, a steel template is Last Run of Ditcher = fate Made with Steel Template on the Bottom of the Wing to Finish the Roadbed Shoulder, the Ditch, and the Side Slope to Standard Form used on the bottom of the wing to finish the roadbed shoulder, ditch, and sid slope to standard form. When working under average conditions, a machine should move about 400 cu. yd. of material in a day and finish almost a mile of ditch A heavy locomotive is required for this work. It is run at a speed of four to eight miles per hour, varying according to the quantity and nature of the material to be handled and the condition of the track. When the second wing is used, much back haul is eliminated. With both 873

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874 POPULAR MECHANICS

> o of ? - + * <& _- * Sat ae 2” a -. 74 -~ t “es + uN - : << eta S Another View of the Wing-Type Ditcher Making the First Cut in the Process of Forming the Ditch and Road- The Steel Frame Supports the Air Cylinder That Operates the bed Shoulder: Wing, Which Is 15 Feet Long and 5 Feet Deep wings in operation, the outfit is so bal- anced that a higher speed is possible. To operate this outfit, only one or two men are needed in addition to the regular crew. The car is fitted with cast-steel cutting shoes that clear the track of obstructing material. An upright steel cross frame supports the vertical air cylinders used for operating the main wings. The wing measures 15 ft. in length and 5 ft. in depth. For transportation, the wings are folded compactly against the car.

AUTO SPEEDOMETER CHANGED TO MAKE SOIL SURVEYS In making the traverse surveys neces- sary for the production of soil maps to a scale of 1 in. to the mile, which are

SPRING BRAKE

READING WIRE “x FOR QUICK READINGS RED FIGURES FOR AID IN SUBTRACTION FOR ACCURATE READINGS Standard Automobile Speedometer Changed to Make Possible Measurements in Hundredths of a Mile, Reg- istered on the Large Dial Attached to the Trip Setter of the Speedometer being made everywhere by the U. S. Bureau of Soils, measurements were taken in the past by the use of the com- mon odometer attached to the front wheel of a buggy. Now that the buggy has been replaced by the automobile, the odometer has been replaced by the speedometer. As this instrument in its standard form records only .1 mile, changes had to be made to make readings possible to .01 mile. The speed and _ season-mileage registers are left unchanged. In connec- tion with the trip-mileage register, the trip setter that extends from the side ot the speedometer head is changed so that it is permanently connected to the trip- mileage gears. On the shaft of the setter is then screwed, and locked with a nut, a large dial with a scale on its circumference graduated to suit the required readings @iIt has been found that copper salts added to casein glues greatiy increase their resistance to moisture and also make them more durable when exposed to the action of molds and fungi. Glues con- taining little lime are specially improved by the addition of copper, which does not shorten the life, or period of workability, of the glue, as much as an addition of more lime would.

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iG SRE i 3 AM tH, IDSE

‘NORTH | “4 OLE FLIGHT nae — a - ~~

The Three-Masted Schooner “Maud,” Leaving Puget Sound on Its Second Trip to the Arctic Regions, in Com- mand of Captain Roald Amundsen and with a Picked Crew: The Intention Is to Enter the Ice Floes before Winter, and after being Frozen In, to Drift with Them across the North Pole UTFITTED and provisioned for a seven-year cruise, the power schooner “Maud” left P uget Sound early this month with Capt. Roald Amundsen, discoverer of the South Pole and conqueror of the Northwest Passage, and a crew of picked men, who will make a second attempt to drift across the polar basin in ward instead of to the “Maud” lost its north, and the propeller near Cape Serge, Siberia, in October, 1921. Short of supplies, Captain Amundsen returned to Nome, Alaska, and from there came to the United States. At Seattle the famous exploring ship

the vicinity of the North Pole. The “Maud” carries with it two airplanes, one of which is to be utilized, if necessary, for the final dash to the pole and return. Captain Amundsen is a Nor- wegian scientist and explorer. He is 50 years old. He reached the South Pole in 1910-11. Financed by the government and King Haakon VII of Norway, Captain Amundsen left Christiania in July, 1918, and entered the Arctic through Bering Strait in the fall of the same year, intending to freeze in with the icepack and drift across the polar sea. How-

of Commodore Peary, the “Roosevelt,” was chartered to succor the ‘‘Maud.’’ The **Roosevelt’’ reached the “Maud” and towed it to St Lawrence Island, where there was no ice to impede its progress, and it sailed under its own canvas to Seattle, 2,500 miles southward. As the “Maud” is flat-bottomed, with out a keel, the feat is con- sidered without parallel in Pacific marine annals. Returning to Norway, Cap- tain Amundsen perfected plans to continue his search for the North Pole. There he procured the services of Norwegian-

ever, the vagrant ice floes moved to the west, then east- Captain Roald Amundsen, Who Expects to Take the “Maud” to the North Pole army flight officer to pilot the airplane, an all-steel |]L-6 plane, obtained in New York, 875

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876 POPULAR which held the endurance record, hav- ing made a nonstop flight of 2,400 miles a few months previously. Because of its bulk, the machine was to be flown across the American continent before being dis- mantled and MECHANICS frozen into the polar icepack, thus mak- ing impossible a repetition of the last mishap. When the ship is ready to pro- ceed under its own power, the propeller will be lowered again into the water. stowed away in the ‘‘Maud.’’ Unfortunately, it was wrecked on the trip, but this did not al- ter Amundsen’s plans, and the large plane car- ried will be able to take the whole crew out of the Arctic, should the ship be crushed in the ice. Another modern inven- tion, with which the ship will be It is believed by scientists that the polar icepack, vast as a continent, is carried across the North Pole from the Pacific to the Atlantic and back again in cycles of three to five years. Many ships lost in the ice on the Pacific side of the Arc- tic have been disgorged by the floes, years later, on the equipped, is a long - range radiophone outfit, and it is not beyond the bounds. of possibility that this Arctic voyage, far from being the lonesome venture of earlier explorers, will be relieved by frequent exchange of news or other information with the centers of civilization. A * nae ™ > a - . é % ey, F 4, a Part of the Crew of the “Maud,” with Doctor H. V. Sverdrup and Cap- Scientist and Navigator Respectively, Who have Accompanied Captain Amundsen on His Various Explorations tain Oskar Wisting in the Center, The “Maud” has been fitted with a de- vice for lifting its propeller when it is Comfortable Living Quarters on the “Maud,” and Four of the Siberian Eskimo Sailors Warming Their Hands at One of the Heating Stoves with Which the Ship is Equipped enough to last Captain Amundsen believes his ship will Atlantic side. The “Maud” will enter the Arctic via Nome, in time to nose into the eternal ice floes when the winter freeze begins. Once in the grip of the floes, the explorers will have nothing to do but drift, make observations, and gather mag- netic and meteorological data. New lands may be discovered and claimed, and it is possible rich mineral deposits will be found. These will ac- crue to the kingdom of Norway, under whose flag the “Maud” sails. The personnel of the party will comprise eleven men: Captain Amundsen, commander; Capt. Oskar Wisting, personal friend of the ex- plorer and his com- panion on the South Pole trip; Dr. H. V. Sverdrup, eminent Nor- wegian scientist ; the pilot of the plane, and a crew of seveti Siberian Eskimo sailors, who have re- mained with the “Maud” ="* since the last unsuccess- ful attempt to reach the pole. Although provisions seven years are carried,

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POPULAR MECHANICS 877 cmerge in the Atlantic Ocean within three to five years. It is expected the ship will reach a point nearest the pole in the early spring of 1924. With the “Maud” as a base for operations, the big plane will then be brought into use for the final dash to the North Pole, while the other plane, a Curtiss Oriole type, christened the “Kristina” before it was delivered to the explorer at Curtiss Field, on April 6, will be used for scout- ing purposes and other incidental service. It is equipped with an electric self-starter, can stay in the air seven hours, and __ coprarcur, yacrewood & unoeewoon like its or chi ry Christening of the ‘Kristina,’ at the Curtiss Field: In the Foreground, Left ike its mother ship will to Right, Are the Pilot, Lieutenant Omdahl; the Sponsor, Miss tly the Norwegian colors. Lily Raynor, and the Explorer Himself ELEVATING END GATE ATTACHED TO MOTOR TRUCK The appearance on the market of a_ elevating gears are driven trom the en iew elevating end gate for motor trucks gine shaft, a simple shifting of a con- hould come as welcome news, not only venient lever raising or lowering the end to the driver who has to load the truck, gate. Should the truck be stuck in the hut also to the .- . merchant who is anxious to speed up deliv- eries and = re- duce costs. The elevator is at- tached to the rear of the truck and the mud, the elevat ing screws may be used as jacks to lift the truck until skids can be placed under the wheels or \ the depressions filled in. This Elevating End Gate Takes Much of the Labor Out of Truck Loading. The Hand Truck is Run onto the ate When in the Low Position, and by Shifting a Lever, Gears on the Engine Shaft are Thrown In and the Gate and Load Raised

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878 POPULAR WISCONSIN’S NOVEL METHOD OF ATTRACTING SETTLERS Wisconsin’s method of adding to the population and wealth of the state is dis- tinguished by absolute originality, and what is better, by unparalleled success, Like all states, not to mention Canada, where immigration is desired, Wisconsin uses printed pamphlets describing the at- tractive features of the state, but it uses these only as a secondary feature—the Reduced Reproduction of a Large Chart, Showing by Dots the Locations of the 5,280 Families Who have Settled in Upper Wisconsin Since the War, as a Result of the Immigration Bureau’s Work primary feature of its method of at- tracting new residents, and of retain- ing them after settlement, being an en- tirely personal appeal, an appeal from man to man, from the director of immi- gration directly to the prospective settler, and a supervision of his interests after his arrival in the state. This method can be best illustrated by describing a typical example. In reply to a bureau of immigration classified adver- tisement, there came an inquiry from a man in Iowa. In reply to this went a long personal letter from the director of the bureau, interpreting an accompanying pamphlet on “Farm Making in Upper Wisconsin,” and pointing out the use of an inclosed “certificate of inquiry” to be presented to any person or firm from whom the prospective settler might pur- chase land. This certificate is a protec- tion to the land purchaser, and it warns the land salesman that the Wisconsin Bu- reau of Immigration intends to keep in touch with the purchaser during the MECHANICS whole transaction. Thus is the immigrant in a large measure protected from falling into the hands of unscrupulous land agents, and should he nevertheless do so, he could appeal to the bureau to have his wrongs righted. The first inquiry from the man in lowa was followed rapidly by another, asking for a soil map-of a particular county. This was sent to him, accompanied by a pamphlet on the subject, and another per- sonal letter from the director of immigra tion, fully explaining the soil map and de- scribing the characteristics of that county After that came several “follow-ups,” all personal letters from the director with the object of maintaining the interest ot the man in Iowa, and offering. service by men who are experts in their respective lines of work. These letters make the prospective settler better able to avoid mistakes in purchasing and selecting land. Every branch of the Wisconsin farming industry is described, from land clearing to potato growing, with special pamphlets on each subject. Then came the final punch, a short note with an intimate touch—so intimate that it even mentioned how irresistibly it made the director’s stenographer smile at the very idea that the man in Iowa wouldn’t realize how splendidly he could make good if he would come to Wiscon- sin. It was explained that every member of the department felt the same way about it as the stenographer, and the man in Iowa was asked kindly to “just write a note on the back of this sheet and return it to us in the inclosed stamped envelope.” The reply came within a week—not from Iowa, but from Wisconsin. That last note had converted the prospective into an actual settler. The result of this kind of work has been that, since the war, 5,280 families have located in northern Wisconsin to develop farm homes. Two large charts have been made, one covered with dots representing new families located on the land during the last three years, and the other showing, with similar dots, each new family that has been directly assisted by the immigration bureau. The second chart has nearly as many dots as the first @ Corrosion of the iron apparatus used in the process of manufacturing sal am moniac, can be prevented by allowing the solution to flow over pieces of calcium carbonate. Complete neutrality of the solution is said to be obtained by thi method, which has recently been patented in Great Britain.

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POPULAR MECHANICS 879 MACHINE LEAVES ONLY CHIPS IN PLACE OF STUMPS When the Tractor Wheels Force This Machine Ahead, the Rapidly Revolving Cutter Arms Reduce the Stump to Chips in a Short Time, and Leave Only a Moderately Large Hole in the Ground, as Shown at the Left The problem of removing stumps has been attacked from many angles, includ- ing burning, dynamiting, and the use of many forms of stump pullers. Now an- other machine has made its appearance which is a radical departure from the usual designs. At first sight it looks like NEW FORM OF GUIDE FOR USE WITH LONG BELTS In driving farm machinery, such as a thresher or sheller, from the drive pulley of a tractor, it is often dif ficult to place the two pul leys exactly in line. In order to prevent the belt from slip ping off the pulley, a guide has been de- vised with flanged, conical rollers, which hold the belt in place but do not fray the edges as a stationary guide would. ANCIENT MOUNTAIN HIGHWAY BECOMES MODERN RAILWAY The most important of the old Nor wegian highways crosses the Dovre, the most famous of all Norway’s mountains, and for more than a thousand years was the main route between north and south. Now, in place of this mountain highway is a first-class state railway, which, al- though only 100 miles long, it required 10 years to build. The fact that only 10 miles a year could be built will be under- a wind wagon or a machine for testing airplane propellers, but in place of the propeller is a rapidly revolving four-blade cutter, which, when forced ahead by the tractor, reduces a stump to chips in a very short time. The engine furnishes all necessary power for traction and cutting. when it is learned that 23 tunnels 1ad to be constructed with a total length »f about five miles, and altogether 87 bridges had to be built. Moreover, the iilway had to 3,335 summit. stood cross a 3,335-ft. SUPPORT FOR NONSWIMMERS MADE IN ANIMAL FORM On the order of the inner tube of a iire, much used by nonswimmers to make Hoating and deep- water bathing safer and more enjoyable, a buoy- ant contrivance of i more elaborate character has been devised, that has the appearance of an exaggerated duck, or other am- phibious animal. This improved float, or buoy, is not blown up like the tire tube, but is made of water- proof material = filled with a very light packing. It sur- rounds the body of the bather, like the tire tube, but is much larger and has a duck’s or other animal’s head in front.

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880 RADIO OUTFIT COMBINED WITH AIRMAN’S OXYGEN HELMET The use of the oxygen helmet has be- come a necessity when attempting record altitude flights because of the rarefied air = This Is the Type of Suit Which must be Worn When Flying at Extremely High Altitudes. The New Oxygen Helmet will Also Contain a Wireless Sending and Receiving Set at the upper levels. The army air service has now designed an oxygen helmet in combination with a sending and receiv- ing set for wireless-telephone messages, so that the airman may keep in communi- cation with the ground station, no matter at what altitude he may be flying. The radio generator will also furnish current for the electric-heating elements con- tained in the airman’s protective suit. NEW TYPE OF LEATHER BELT TO PREVENT SLIPPING A type of leather belt that will not slip on a pulley has been invented in France. It is of oak-tanned leather and has riveted on the under, or pulley, side strips of chrome leather. The manufactured sizes are from 1 in. to 16 in. wide, with the chrome strips %6 in. wide by %e in. thick, and a “%e-in. space between strips. The rivet attachment consists of a single line of brass rivets, 2 in. apart, in each chrome strip. It is claimed that the combination POPULAR MECHANICS of oak-tanned and chrome leather gives the ideal of tensile strength in the former and efficient adhesion in the latter. In the ordinary belt the presence of air be- tween pulley and belt is a cause of slip- ping; in the new form of belt any such air is squeezed into the spaces between the strips. Comparative tests with an ordi- nary belt and one of the new type, each 3 in. wide by 14 in. thick, showed the co- efficient of friction of the latter to be greater than that of the older style. MONUMENT UNVEILED IN PARIS TO VICTIMS OF BOMBARDMENT It will be remembered that on Good Friday, four years ago, the church of St. Gervais, in Paris, was struck by a shell from the famous German long-range gun, located 75 miles away. A large congrega tion was in the midst of its devotions, and 91° persons were killed and 150 injured On the fourth anniversary of this sad event the archbishop of Paris unveiled a monument in the restored church, erected to the memory of the victims. Monument Erected in the Church of St. Gervais, Paris, to the Memory of the Victims of the German Bombardment, Good Friday, 1918 @ Designed to meet the peculiarities of the roads and local conditions, the first Japanese automobile has a wheelbase of 84 in., and a weight of 850 pounds.

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POPULAR MECHANICS 881 TEST AMPHIBIOUS MOTOR CAR ON RIVER RHONE Paddles, Forming Part of the Four Wheels, Furnish Means for Propelling the Car in the Water \nother motor car new which will travel equal- ly well on land or water, the product of an in- entor of Lyons, France, has proved success- The Amphibious Car is Here Approaching the Bank of the Stream after Travel- ing on the Water landing stages rr small craft, the car was ea ly steered in fac of a rapid cur- rent, and thu traveling now on the road, now on ful in prelimi- nary trials which have been held. It was first tested on a canal in the neigh- borhood of the great silk center, and with 10 passengers on board developed a speed of 744 miles per hour against the current. Before this preliminary trial it was driven ilong the road from the inventor’s garage ind after the trip made its way home with perfect ease. A more exacting test has now been car- ried out on the swift-flowing river Rhone. I:ntering the water on the quay side, by vay of one of the inclined planes used as NEW AUTOMATIC BALL VALVE OF EXTREME SIMPLICITY Consisting of only two parts, a noise- automatic ball valve, the invention of i veteran journeyman plumber, is_ the essence of simplicity. The valve is in the form of a spindle, threaded into a socket so that when the floating ball in connec- tion with the spindle is in the required position, the valve has moved onto a valve seat in the socket, automatically closing it. The thread has a large pitch, and the least movement of the ball re- opens the valve. It is made of brass, ind has -little to get out of order. Two Float Tanks Supply Buoyancy for the Car When in the 15 Water, and the Wheels are Drawn Up by a Special Arrange- ment So the Paddles will Be at the Proper Depth the river, about miles were covered during the tests. was this second that he lis amphibious Indeed, so successful test that the announced ; ; i intended shortly to take inventot car to Calais by road and there try to cross the Channel to Dover. Propulsion in water is obtained by paddles, forming 1 1 part of the four wheels, which are raised by a special mechanism w floated. In this way the paddles are at the right level. This test car is fitted with a 14-hp. motor. Two float tanks support it when in the water. 1ien the car is Simple Automatic Ball Valve Seen Assembled Below, and Disassembled Above, on an Enlarged Scale, Show- ing the Only Two Parts of Which It Consists—a Spindle and Socket

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POPULAR FLOAT BRIDGE LATEST AID FOR ROAD BUILDING Supplementing the work of the “finish- ing machine,” a float bridge—the latest item of equipment for the construction of and Bridge for The Smoothing Belt is Operated by the Lever Fastened to the Bridge, Which is Mounted on Wheels Combined Float Finishing Concrete Roads: concrete roads—has recently been devel- oped by a Cleveland company. The essentials of the apparatus are a combined belt float and substantial bridge extend- ing across the pavement, all of which can be easily handled by one man. A lever moves the smoothing belt back and forth over the soft surface of the work and at the same time automatically advances the machine with each stroke. It is claimed that after the concrete has been struck off, tamped, and surfaced, the use of the float bridge prevents the “hair cracks” appearance of in the finished product. == ~ e A eh nt Ri ln wr cetoneptein MECHANICS EVENTS OF AMERICAN HISTORY TO BE SHOWN IN FILMS That the study of American history may be made something besides the mere drudgery of memorizing names and dates is presaged by the announcement that many of the more important events are to be made the subjects for motion-picture films. More than one hundred reels ar¢ to be made under the auspices of Yale University, and every effort will be made to have all details authentic. ELEVATING-PLATFORM TRUCK HAS GASOLINE MOTOR Elevating a platform, 26 in. wide by 54 in. long, with a load of 4,000 lb., from a minimum of 11 in. to a maximum of 16 in. from the floor in eight seconds, is pos- sible with a new gasoline-driven truck The lifting mechanism is operated by hydraulic pressure derived from a 15-hp. 4-cyl. tractor engine, which is mounted at the rear in a closed compartment containing the transmission, governor, vacuum tank, radiator, etc. The machine has a forward and reverse speed of six miles per hour, will climb a 10-per-cent grade fully loaded, and has a brake-lever pedal so arranged that the removal of foot pressure automatically causes it to stop. High-grade roller and ball bearings are used in the running mechanism. Elevating-Platform Truck being Used in a Machine Shop for the Purpose of Transport- ing Heavy Bins Con- taining Miscellaneous Unfinished Parts from One Department to Another: The Control Levers, Gasoline Tank, and Siren Horn can | be Plainly Seen in Front of the Operator. The Insert Gives a Bottom View of the Elevating- Platform Truck and Shows the Lifting Mechanism Which is Actuated by Hydraulic Pressure ie from the En- gine

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“Ohe ROMMEL af Ae RECALLED MAIL te. ID you know that there is a depart- ment in Uncle Sam’s postal service whose business it is to “snatch back” let- ters for the sender—letters which, if deliv- ered, would entail all kinds of undesirable consequences, every possible phase of hu- man tragedy or comedy? On the quick action and accuracy of the employes in this department ofttimes hinges not only hundreds of thousands of dollars, but even human life itself. Thirty thousand such cases were handled by the Chicago office during last year. A man, holding a high position with an eastern corporation was going from New York to San Francisco. He stopped off in Chicago in order that he might get some special-delivery mail which was to meet him there. This mail was coming from the West, and on its receipt at this point hinged a $2,000,000 contract and the decision as to whether he should go straight on to San Francisco or re- turn at once to New York; be should he fail to receive . — it, not only the contract would be seriously jeop- ardized, but he would be left in a quandary as to his next move. On his ar- rival he went to the hotel ~ By Grace Orh him just as it was about to be placed in a bag bound for Kansas City. The man was saved and all was well; but the margin of safety was exceedingly narrow. Another instance: A young man (well groomed, but evidently much disturbed in mind) came into this department of the service one day; gave his name as John S., and wanted to get back a letter ad- dressed to Miss Mary Blank; said he had put a “wrong inclosure” in this letter, and it was extremely important that it be cor rected. He gave proof of his ownership of the letter and it was given back to him on the reason given by him—“wrong inclosure.” But, being wise in human lore, the employe knew that John had probably (in a fit of anger or jealousy) written a nasty letter to Miss Blank (per- haps breaking his engagement to her) and mailed the letter immediately; a little later he came to, regretted the letter, and wanted to get it back. Many, many times in the course a year this kind of situation and the postal service turns omnipotent and holds up the consequences of the letter written on the im- pulse of the moment. A large manufacturer was sending out price lists to his outlying representa- of arises, and asked for his mail, and tives: some 20.000 of these was told by the clerk, letters had just been placed “Yes, we did have some in bags and sent to the mail for you, but we have down-town post office. A just sent it back to the “John had probably (in a fit of wire came in that market post office. You know our "ger or jalouny) iritten a wii. prices had gone up. If instruction was to hold tater he come to and wanted to get those letters should be de- mail for you 24 hours and the letter back.” livered, he would be the then forward to Kansas City. Sorry; it loser by thousands of dollars. There was has not been gone half an hour.” By quick action, the regular forms were re some unlucky chance his mail had arrived 24 hours ahead of him. And he dared not miss those letters! He went at once to the postmaster, and with the assistance of the hotel authorities, explained his dilemma, proved his identity and owner- ship of the mail, and it was rescued for sorted to, and with strenuous effort the letters were intercepted before they left the city office. Of the many reasons given for the re- call of mail, that of “wrong inclosure” predominates; and these words are a con venient symbol for the letter written in 883

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884 haste, or for the changes necessitated by Prac- the fluctuations of the tically 90 per cent of the requests for the recall of [)\j J) market. thy mail come from the rail- |} | | roads, and nearly all are jj) local recalls. Telegraph f) recalls average only about SB one per day in the Chi- aes cago office. Beace However, the law f makes provision for the ff recall of mail anywhere (with the exception of mail sent to Great Britain or its colonies, to which reference will be made later), whether it be before it leaves the post office of the sender, en route on train or ship, or in a foreign country. Appli- cation is made by the sender to the local postmas- ter for a recall, giv- POPULAR MECHANICS vidual, it is easily evident that the exercise of the greatest possible care is neces- sary, or the wrong piece of mail may be given back, or given to the wrong person, or to one who is desirous of using it for some illegitimate purpose. Nevertheless the romance clustering around this particular de- partment of the postal service is ex- ceedingly inter- esting and of fers almost as varied an appeal as does the hu- man equation itself. GIGANTIC TURBINE PLANT DESIGNED A German professor has prepared a de- sign of a super- power station in which the units “The clerk or the erpense of the a¢e nde ee sum of money to cover return telegram or cablegram, local postmaster wires either the postmaster of the railway addressee (at the who also deposits a sufficient ing the reason for such, and he wires either the railway will be of 160,000 kva. each, or almost three times as large as the case may be) clerk or the post master of the addressee (at the expense of the sender, who also deposits a sufficient sum of money to cover return telegram or cablegram, as the case may be). The letter is returned, the sender calls for it, ind leaves a receipt which is kept on file. \ foreign recall is handled through the second assistant postmaster-general. This course of procedure applies gen- erally except to Great Britain and its colonies. ter which is once posted to that time on the addressee. The United States takes the other view; namely, that a let- ter is the property of the sender until it has been placed in the possession of the addressee. Hence the whole procedure rests upon the sender’s Here the law considers the let- be from f the proeperty on ot as the largest turbo- generators that have so far been con- structed. The turbines are designed as double-flow machines, with steam admis- sion in the center and exhaust at both ends. The weight of each unit will be about 600 tons, of which the rotor repre- sents nearly 222 tons. Each station will have six units, one being held in reserve. One hundred boilers of 10,750-sq.-ft. heat- ing surface each, will be required, and the cooling water necessary could be sup plied only by a large river. The sta- tion would consume 50,000 tons of coal per week, which would be handled in trainloads from th: mines and dumped into bunkers at the station, to be fed into the boil ers by bucket convey ors. lt would be trans- , ported from storage by establishing his owner- ship of the mail to be recalled. While this law proves a mighty boon to many an anxious indi- emcee —_ “The letter is is kept on file.” a ae ce returned, the calle for it, and leaves a receipt which overhead railroads. Five of these super-power i stations would be able to supply the total power demand of Germany. sender

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POPULAR MECHANICS 8 x ST | Bt 2°45) 4. “> abe ene. 2, * ¥. RUNAWAY TRUCK DEMOLISHES ARMY BARRACKS W HILE delivering coal with a truck in the Panama Canal Zone, the driver attempted to back the machine against a coal shed, which was located on the lower side of a road leading up a hill, and lost control of the vehicle. Breaking through the light guard rail at the edge of the highway, the heavy truck plunged down the incline and crashed into a large building being used as an army barracks, The impact was so great that the building collapsed, as shown in the accompanying photograph, burying beneeth the débris a soldier, who was the sole occupant and who received but slight injuries from the unusual accident. WHITE CEMENT BLOCKS FOR CROSSING MARKERS blocks. The latter has \ new method of outlining the limits of street crossings, which does away with the necessity of painting the lines on the pavement once or twice a year, has been ingredient the effect of producing a very hard, tough, durable, glasslike finish which, it is thought, will withstand heavy traffic. adopted by the city of Portland, Ore. White cement blocks, 6 in. in cross sections and 2 ft. long, are set into the pavement with their edges flush with it. They are slightly crowned on the top side so that they project about 1 in. above the surface at their cen- ters. Each street inter section requires 56 of the blocks to outline the four crossing limits, there being seven of them placed on each side of each crossing. Hydrau- lic cement, mixed with a solution rich in celluloid, is used in making the Hydraulic-Cement Blocks are Used to Mark Street Crossings in Portland, Oregon. Being Exceptionally Smooth, Hard, and Tough, They are Expected to Last Several Years, Thus Eliminating the Yearly Painting Job

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836 POPULAR EVAPORATOR TUBES ARRANGED IN DIAGONAL LINES A new type of evaporator has been designed which appears to combine the advantages of the older styles in which In This Evaporator the Steam Passes Downward through One’ Bank of Tubes and Returns through the Other Bank. The Liquid being Evaporated is Intro- duced in the Shallow Pan beneath the Tubes the tubes were arranged either vertically or horizontally. In this new evaporator the tubes are placed in banks along diag- onal lines, and the construction is such that the steam passes down through one set of tubes and returns through the other set. By this method of placement it is possible to use tubes of smaller diame- ter, which.are claimed to be more efficient for the transfer of heat. Also, the water condensed from the steam flows by grav- ity in the same direction that the steam is traveling. The liquid to be evaporated is introduced in the center below the two banks of tubes. IECHANICS PROCESS FOR ELIMINATING DISEASES IN COTTON Boll rot and other fungus diseases of cotton may be eliminated by a process which is the result of many experiments, extending over a period of two years, made at the University of South Caro- lina. The cotton seed is first dried and heated to a temperature of about 212°F. It is then subjected to a treatment by sul- phuric acid, which removes the lint and kills all fungi, particularly the boll rot. It was found during the experiments that a very large proportion of the seed treated was perfectly sterilized by the sulphuric acid alone, without previous heating. Seed treated in this manner was found to sprout much more rapidly than untreated seed. ABANDONED CHURCH BUILDING UTILIZED AS A GARAGE An abandoned church building in Wash- ington, D. C., has been converted into one of the most commodious and service- able garages in the city. The old wooden floor was replaced by one of concrete, and part of the steeple was torn down, the remainder serving as support for a large water tank. The garage accommo- dates the numerous milk con- wagons Between the Limbs of the Trees can be Seen the Front of a New Garage in an Old Abandoned Church Build- ing. Part of the Old Steeple is Replaced by a New Water Tank nected with the largest dairy in Washing- ton. The front exterior of the building was repaired and finished so that it looked like a new stone building.

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POPULAR MECHANICS 887 Screened-In Body Which is Built on an Automobile Chassis and Which is Used to Transport the Hounds ts the Starting Point of the Hunt: The Fox Horns and Other Necessities of the Hunt are Seen on the Top of the Conveyance “HOUND WAGON” TRANSPORTS CANINES TO THE CHASE Yelping and eager for the sport, fox hounds belonging to a southern estate are hauled to the chase in a specially designed “hound wagon.” This consists of a dou- ble-decked, screened-in body built on the chassis of a small automobile, on top of which are carried the fox horns and other necessities of the hunt. @iIt is announced that Tufts College, Medford, Mass., is to commence giving a lectures by radiophone under the auspices of the faculty. The lectures will be broadcast twice a week. series of RESIDENTIAL PART OF CITY DAMAGED BY OIL GUSHER Before the discovery of oil, Signal Hill was one of the most beautiful residential sections of Long Beach, Calif., and many of the finest homes were located there Now, however, it looks like an oil field which has strayed into town by mistake Recently one of the oil companies operat ing there brought in a well which proved to be a gusher, and the entire section was drenched with a spray of black oil whic! ruined trees and gardens and caused un- told damage to houses and furnishing The oil spray was carried in some cases a distance of three miles from the oil well. LST} lk set oo, pee cg pili Mew Left: This Gives Some Idea of the Appearance of the Trees after being Drenched with the Spray of Black Oil rom the Gushing Oil Well. Right: Before the Discovery of Oil, This Was One of the Most Beautiful Residences in Long Beach, but It Is Now the Office of One of the Oil Companies

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COMMUNITY CENTER AT ISOLATED POWER PLANT By CHARLES W. GEIGER

COMMUNITY, E Be wren | a* SEPTIC TANK U 10,000-GAL. RESERVOIR *~

This Plan Gives an Idea of the General Arrangement of the Community Center, Which is Laid Out in Ac- cordance with the Natural Contour of the Country. All Living Quarters wi'l Be Convenient to the Power House, but Far Enough Removed to Be Quiet N our industrial development, the more progressive companies have given in- creased attention to the physical and mental welfare of their workers, not en- tirely from altruistic motives, but because they realized that the mental attitude of the individual had a direct bearing on the quality of his service. A _ cheerful, contented worker brings to his task a

‘Taal er.| - ae — 2 anls BA.) | Xe anié BR u j 5 - ~ lene use) ~ teat | ro I

This Ground Plan of the Clubhouse Shows the General Arrangement of the Rooms, and the Separate Wing with Rooms for the Single Men. The Covered Passage from the Wing to the Clubhouse will Permit Persons to Pass between the Two in Comfort in Rainy Weather spirit which makes his work a pleasure and a source of pride. That the mental attitude is favorably influenced by at- S88

SUPPLY CELLAR

a DINING LIVING | 2 E _ —— y ROOM ree Resp é SOFT. Jj (SFY

tractive surroundings and comfortable accommodations has been realized by one of the power companies on the Pacific coast, and has found expression in the community-center development at one of its power plants. The station is located in the high mountains among beautiful surroundings, but will have one great drawback—isolation. The company has sought to overcome this by the creation of the community center, where all the conveniences of the modern city will be available, There will be attractive cottages for the married men and their families, and a spacious clubhouse for > social gatherings, with one wing given to rooms for the single men and visitors. The plan has been care fully laid out, and

all construction will be of such na- ture that it will har-

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POPULAR MECHANICS 889 This View of Three of the Cottages Exemplifies the Care That has been Used in De- signing Them So That They hould Have an Individual Appearance. Right: The Power House with Its Beau- tiful Surroundings monize with the sur- roundings. Native rock ill be used for the foundations, and dif- rent combinations of ustic exterior cover- ngs will be used, so hat each home will ive an individuality its own. @ In order to impress the points being rought out in a safe- ty campaign, the Bu- reau of Mines is mak- ing arrangements with | a number of produc- ; ing oil companies in California to make moving-picture films of the petroleum in- dustry. ceees:. aff Zs wei! - ee eee le “4 fem = a ef fh St weweccsewarere fr eres This View of the Clubhouse Gives an Idea of the Way in Which It will Blend with the Surroundings. The Foundation will Be of Native Rock. and the Exterior of Rustic Design. The Separate Wing will Contain Rooms for Single Men — ptr Saw

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S90 POPULAR SLACK PULLER TO REPLACE BLOCK AND TACKLE For pulling the slack out of guy wires, or for any similar work, to much better advantage than with the customary block and tackle, a special slack puller has re- cently been placed on the market. In- stead of re- quiring the work of sev- eral men, as is often neces- sary with the block and tackle, this puller can al- ways be oper- ated by one man. The pulling power is obtained by a pair of bevel gears that operate a bronze nut in connection with a long threaded rod, at the end of which is a strong drop- forged hook. The gearing is driven with a ratchet crank, which gives one man plenty of power for any ordinary wires. RUBBER GRIP FOR PENCILS PREVENTS SLIPPING Adaptable to various sizes of pencils or penholders, a soft-rubber sleeve has been invented to eliminate the constant slip- ping down of the fingers when writing. The sleeve, or tube, has longitudinal slits plas IPE LAR am - ‘ i Left: Rubber Grip for Pencils, Showing How the Ends are Twisted and Pushed Together. Right: Rubber Grip before being Twisted cut in it, which permit the regulation of the tube to any desired finger position. MECHANICS This is accomplished by twisting the solid ends of the appliance and pushing them toward one another, after being placed on the pencil or pen. OIL PRODUCTION IS LESSENED BY DELAY IN DRILLING Recent investigations by the Bureau of Mines have shown that a delay in drilling into an oil formation after it has been opened may cause a loss up to 50 per cent in the ultimate amount of oil pro duced from a well. When a well pene trates the oil formation, the oil is forced out by the pressure of the gas included in and associated with the oil. This gas pressure may cause the oil to move through the deep layers from surrounding territory and be forced or pumped out of a well on adjoining property. This ex- plains in some cases why the first well drilled in a new field may have a much larger production of oil than wells drilled at a later time. COMBINE HOME SAVINGS BANK WITH NEAT DESK WATCH There is no doubt that the home sav- means of ings banks have been the inducing peo- ple to save their money, but, unfortu- nately, in some cases the little banks have been put away and forgotten. Now, how- ever, one type of these metal banks has been com- bined with a watch to form an attractive desk clock, and this is an assurance that the bank will be kept where it will be always ready to receive any spare change. The bank has a capacity of $12 to $14 in the various coins, in addition to which there is a slot for the insertion of paper money. @ At a recent wireless-receiving contest the championship was won by a young man from Chile, and a new speed record was established when he received 49!» words per minute sent in continental code by wireless.

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POPULAR MECHANICS 891 ONLY MOHAMMEDAN MOSQUE IN WESTERN WORLD For the first time in history a Moham-_ worshipers will face Mecca when they medan mosque has been erected in the perform their daily prayers. western hemisphere. Although = : there are many thousands of Moslems in America, most of whom observe their religious customs as far as possible, they have never had until recently any mosque or house of worship in the new world. Now, however, a building has been completed in Highland Park, a suburb of De- troit, which is typically Turkish in design, having two minarets, one on each front corner and a small tower of similar design in the center of the roof, these three towers all bearing the star and a ae crescent. The auditorium is so Mohammedan Mosque in Highland Park, near Detroit, Showing arranged that. in accordance with the Towers Adorned with the Star and Crescent: Although There 1 . . oe Are Thousands of Moslems in America, This Is the First Mosque the ordinances of their faith, the Ever Built in the Western Hemisphere AUTOMATIC SLACK ADJUSTER FOR BRAKE RODS kor use on railroad cars, an auto- and on the wheels of the car, for which matic slack adjuster for brake rods has without this device, the only remedy is to recently been placed on the send the car to the repair shop. The slack adjuster is attached to th: brake rod of the car truck, and has a small hose connection to the main air-brake cylinde: through a port 3 in. from the cylinder's end. When shoe weat a % causes the piston in this cylinde: { Right: Automatic to travel bevond this port. com Slack Adjuster, At- 7 : tached to the Brake pre ssed air is admitted automati en ee ee cally to the small cylinder of th 5S iTle ose = * nected to the Main slack adjust r, where it moves Air-Brake Cylinder. forward a pawl that engage Above: The Ad- : . . : 2 : juster Detached ratchet on the bt ike rod in, suc a manner that, when it is returned market. It automatically adjusts the rods by the action of a spring in connection in connection with the brakes, so as to’ with it, the proper adjustment 1s made to 1 } | le shoe to act again compensate for wear on the brake shoes cause ft TIRE ROPES REPLACE CHAINS ON MOTOR-CAR WHEELS \rmored tire ropes s, as substitutes for , : 7 - le commonly seen chains, have been pro duced by an Ohio man, for use on any motor car when it is difficult to obtain good traction. The covering of armor extends over the width of the tire, and a wedge clip is emploved to keep the rope from shifting. When the armor becomes te. ; worn on one side, it is an easy matter tO At the Left is Seen the Armored Tire Rope, Showing twist the rope so that another part of the the Wedge Clip That Keeps It from Shifting. The , Manner of Attaching the R to the Wheel and Tire armor will be exposed to wear. is ~ Se ys ‘Right — -

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892 POPULAR MECHANICS MOVING PICTURES TO ILLUSTRATE EINSTEIN THEORY N ATTEMPT is is a miniature req being made to d n f +} ‘ } visualize by means rl will 1 ed in of the movies Pro- enmitens a fessor Einstein’s reproduction of tl much-discussed the- nocturnal heavens ory of relativity. Already many feet of film have been made in this at- tempt to picture the intricate principles involved in the the- ory in such a man- ner that anybody can understand them. In doing this, all the tricks of the movie camera—such as double exposures, lap dissolves, miat- ting out, high and shown in the upper right-hand picture In this the stars and planets are made o colored glass, and can be manipulated as desired. With these objects, the process of makinga film is shown inthe lower picture, An- ther T rt of the film will be devoted to the application of the principles to ox currences of every- low speeds — have day life, so that they been resorted to ‘ will convey concrete Demonstrations of ideas to minds that this kind in connec - — - = are old or young, tion with the astral simple or complex, universe will be given in an interesting manner by the This will be done by means of pictures of adventures use of the objects shown in the accompanying pictures, of an extraordinary nature that might happen to human in which the small ball in the upper left-hand picture beings by a strict application of these principles. MODELS SHOW BEST TYPES OF COTTON WAREHOUSES Model fireproof cotton warehouses that of Agriculture. These warehouses com pay for themselves in a few years out bine utility with every known fire-protec of savings in insurance rates alone, have’ tive device. They range from one-story recently been designed by the Department buildings with wooden walls that can be This Model of a One-Story Cotton Warehouse of Reinforced Concrete Exemplifies the Best Features in Fireproof Construction. The Sectior at the Right Shows Automatic Fire Doors and Concrete Loading Platform

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POPULAR MECHANICS 893 knocked down in case of fire, to four- bale is automatically disengaged ac the story reinforced-concrete buildings that proper floor. To lower the cotton, a cir- are practically indestructible. cular or straight chute is provided. One- One model is a one-story three-sec- story buildings of this type can also be iion brick structure with concrete founda- constructed. tion and loading platforms. Continuous Of the 3,000 cotton warehouses in the fire-brick walls, 18 in. thick, separate the sec- tions, and extend 18 in. above the roof to pre- ent the spread of fire . Irom one compartment to another. Additional sections can be added as the business may require. he roof is graveled, and park-proof. There are ‘utomatic sprinkler sys- tems throughout. Double doors at front and back provide continuous pas- sagewavs for trucking This Model Shows the Proper Construction When Wood is Used, the Ware- = ; Pap © house being Built in Sections, with Walls That can be Knocked Down through the building, and in Case of Fire, to Aid the Firemen in Reaching the Flames United States less than 300 are properly con- structed to secure the minimum fire-insurance iy ate, which is 10 cents per “ee $100 of value per annum. a ee é ‘ blk The majority of ware- , rn houses are improperly constructed a regards fire hazard and pay fire insurance rates of 50 cents to $3 per $100 of value. Applying these — rates to a 3,000-bale ca This Is a Model of a Four-Story Cotton Warehouse of Reinforced Concrete pacity warehouse, the and is Equipped with Fire Doors between Sections, Which Close Auto- matically When a Certain Fixed Temperature is Reached saving in premiums on cotton stored in a on light is admitted through skylights, and story fireproof building would pay for the rough windows over the doors, structure within five years. \ reinforced-concrete building in four — tories is the most improved type of cot- Q@Recent statistics show that one-tenth of mn warehouse known. Spread of fireinthe the lead produced in the United States is uilding is prevented by automatic doors used in the telephone industry. hich close when the heat reaches 160° F. These doors are controlled by chains with one or two nks of soft metal that melts at this tempera- ture. Concrete platforms are provided on each floor for trucking and sorting the bales, a chain elevator being used to raise the bales to the va- rious platforms. Hooks on the chain catch the a ee vi axle of the truck c: “es This Model Shows the Proper Construction for a One-Story Warehouse ing the ec vagysly “4 When Brick is Used. It is Built in Scctions, with 18-Inch Firewalls ng the cotton, and the between Them, Which Extend i8 Inches above the Roof

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894 POPULAR EXACT-SIZE PICTURES MADE WITH JEWELERS’ CAMERA Jewelers will appreciate the introduc- tion of a camera that will photograph any article up to 5 by 7 in., yielding a re- production which is exact to size the finest de- tail. The ap- pliance, which hangs on the wall by hinges, is 40 in. high, 10 in. wide, and 7%4 in. deep, and has an adjustable table on which objects to be photographed are placed and automatically focused by means of a lever at one side of the framework, thus enabling any person to operate the camera. HOLDER FOR COMPLICATED SHAPER WORK DONE WITH SHAPING SAW Work similar to that done on a shaper or a milling machine, is now being done with a machine tool that does all its cut- ting with a saw blade like that used in a hack . saw. This is carried centrally in a -—w® —— four-sided frame that enables the blade to be put under proper ten- 2 s1on, » elimi- and: MECHANICS nating all blade is vibration and chatter. mechanically lifted from The the work on the noncutting stroke with a uniform lift on every stroke. There is a uniform feed pressure through the entire cut, and this is regulated automatically by the resistance in the material being cut. The speed can be regulated to suit all classes of material. The machine has various fixtures for angle-cutting opera- tions, and for cross-feeding. It is driven with an individual motor. The outstand- ing advantages of the machine are the great saving of stock in many jobs, as compared with similar work done on a shaper, and a corresponding saving of time. CAR-HEADLIGHT IMPROVEMENT AIDS DRIVING AT NIGHT Night driving over country roads has been greatly aided by the introduction of cea, @& Beadiion improvement which can be easily and quickly mounted on any car. The accessory re- flects the light so that the road ahead, the wheels, the ditches at the sides, and any oncoming machine are seen simulta- neously. Glare is prevented from showing above a 42-in. height, there- by eliminating the blinding of an ap- proaching motorist and reducing the pos sibility of an accident which often results from a careless use of the “bright lights.” At the Left is Shown the Saw with Which Work Similar to That Done on a Shaper, or a Milling Machine, can be Accomplished. At the Right are Seen Specimens of Numerous Kinds of Work Completed with the Shaping Saw

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POPULAR NEW SPAD-HERBEMONT PLANE FOR EUROPEAN AIR LINES \ new Spad airplane of remarkably clean lines has recently made its appear- ance on many of the European air routes. The passenger cabin, entirely inclosed and accommodating five persons comfort ably, is situated between the wings and just back of the engine compartment. The } i Power is furnished by one 250-hp. motor, and the plane carries suf- ficient fuel for a flight of 64% hours with five passengers. The flying speed is about 110 miles per hour, with a motor speed of ly 1,450 revolutions per minute. pilot’s cockpit is located farther back i1 the fuselage. AIR-STABILIZING ATTACHMENT FOR AUTO CARBURETORS Complete combustion of the fuel in an automobile engine, under all varying con- ditions of atmospheric temperature and density, requires some mechanical means of stabilizing the air so that it carries al- ways the same proportion of oxygen. An air stabilizer has been constructed for this purpose that can be connected to any car- buretor. The air passing in on all sides of the cylindrical device is first dry-fil- tered by an outside screen, from which it passes through six humidifying screens that are kept constantly moistened by MECHANICS 895 This Five-Passenger Spad-Herbemont Plane is Flying on Many of the European Air Routes, and is Powered by a 250-Horsepower Engine, Driving a Four-Blade Propeller capillary attraction from a bowl of water below them. The supply of water in the bowl is maintained from a tank bracketed to the dash under the hood. Thus the temperature and condition of the air that r I SUPPI TANK BRACKET BOLTED TO DASH UNDER HOOD EXIBLE TUBE TO SECONDARY AIR VALVE i CARBURETOR TUBE TO PRIMARY INTAKE OF CARBURETOR FILTER AND HUMIDIFYING SCREENS Air Stabilizer for Connection to Carburetors, Fully Explained by Notations: Outside Filter is Cut Away to Show Humidifying Screens and Internal Construction passes to the carburetor are kept uniform under all atmospheric conditions.

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POPULAR MECHANICS SIXTY-MILE BEACH USED AS TRACTOR ROUTE too — eos ANGELES SAN BERNARDINO WILMINGTON Along the California seacoast, extend ing from Capistrano south to Morena there is a piece of level coastal plain, some 60 miles in length and about five miles wide, which is given almost com pletely to the growing of navy beans. The hean farms are of va over st acreage, and trac- are used almost exclusively for cul- tivation. A paved motor highway runs north and south through the entire length of this bean country, but the tractor men are forbidden to use this highway because of the damage they inflict to the pavement if they do not go to the trouble of re- moving the cleats from the bull wheels of their vehicles. Obviously, the exclu sion of the tractors from the highway inflicted a serious handicap upon the farmers in getting from one field to an- other, and from farm to farm, with their ponderous vehicles. The difficulty was tors Above’ One of the Machines Using the Beach as a Tractor Highway. At Low Tide the Hard-Packed Sand Makes an Ideal Road for the Tractors. Left Map of the Coast, with the 60-Mile Beach Heavily Shaded made all the worse by the fact that most of the farmers do not own the tractors, but let their work to several different firms doing business in the tractor culti vation of lands. For several years the farmers have struggled along, getting their tractors from farm to farm as best they could. For the most part the tractors have been loaded onto motor trucks, and thus trans- ported with the expenditure of consider- able labor and money. Recently, how- ever, the problem of tractor transporta- tion from farm to farm vanished with the discovery, by one of the tractor men, that the hard sand along the seashore at iow tide olfers a convenient tractor high- way up and down the entire length of the hean country. The tractors may drop lown onto the seashore from almost any the 60-mile stretch, and once there, at low tide they have an easy route to any other farm in the system, without any physical or legal difficulties. { farm in THE CULTURE OF PECAN TREES TO BE TRIED IN CHINA Encouraged by the success of the pecan growers on the western coast of the United States, an attempt is to be made to introduce the culture of pecan trees in China. The College of Agriculture of the University of Nanking is distributing seed nuts at a nominal price to farmers or persons who are interested. Planting and culture directions furnished. are also

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POPULAR COLLECTING GAS-MAIN “SWEAT” FROM DRIP WELLS Soon after gas leaves the holder it be- vins to “sweat.” The cooler walls of the mains cause a condensa- tion of gas moisture that must have an outlet or the underground pipes vill quickly fill with this liquid. For this rea- son mains must be laid with sufficient fall to drain the accumulating condensation into drip located at certain points in the system. + vas wells STANDPIPE To [5 STREET LEVEL | | + GAS |MAINS -+ | ag DRIP WATER ; MECHANICS 897 40 ft. below the street, and often yields 200 gal., or more, at each daily pumping. Formerly, the pumping of all the drip water was done by hand, but the motor of a 788-gal. tank wagon now does this rr 4 r 8 These wells, or siphons, they are sometimes called, have varying ca- pacities, some of them in the city mains holding several hundred gallons. They are usually constructed in the form of a huge drum, having i. gaS-main outlet on op- another maller standpipe leading to the manhole in the treet above, so that the drip water can be pumped from Which the out. The wells must have The Insert onsiderable excess capacity, as the quan- of water often varies many gallons during the course of a day. Underground temperature may flow without is largest posite sides and increase or decrease the any apparent change in street-surface weather conditions. The deepest and largest drip in Brooklyn, N. Y., situated near outheast entrance to Prospect Park, well the is Hand-Pumping the Drip Water from One of the Drip Wells into a Bucket, Water is Pumped by a Motor into a Tank Truck: Shows a Cross Section of the Drip Well work for all except this deepest well. Its drip water must be hand-pumped, as the motor pump has not enough pressure The greenish-yellow fluid pours into a bucket, from which it is sucked by the motor pump. Drip water smells strongly of gas and is extensively used in the mak ing of high explosives, such toluene as trinitro ELECTRODES SELF-ADJUSTING IN ELECTRIC FURNACE Self-adjusting electrodes are the feature of a new electric furnace, and these are counterweighted so that the lower ends “So OR Am wh =e j : bc cmssteslnesiscsl Furnace in Cross Section and with Electrodes Inserted and Withdrawn the cut can be any predeter current desired from a When the power is electrical of 1 immediately when swing together in contact The counterweights rent off. regulated mined amount three-phase switched on, the the car them apart a 1S t + SO) ts LO araw ot line. the repulsion and tormation between vases pons rores di tance propor tionate to the strength of th: current. Should the power be reduced, the carbons are auto matically drawn closer to each other, which prevents the break ing of the heating are. Thus the outfit may be operated as either a “direct-arc” or as an “indirect are” furnace, depending on the kind of metal to be melted

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“COPYRIGHT LAW” OF NORTHWEST INDIANS Strict Rules— in Effect a Copyright Law, Although Inspired by a Different Motive— Protect the Totem Poles of Individual Clans against Imitation By FRANCIS DICKIE HAT a “copyright law,” very similar to that in force among the civilized nations of the world, existed among the primitive Indians of northern British Co- lumbia and Alaska long before the white man came, is a remarkable fact which the correspondent of Popular Mechanics dis- covered recently while traveling through the northern wilderness region of British Columbia in company with William Bey- non, of the Canadian ethnological re- search. Mr. Beynon is one of the greatest living authorities on the native peoples of this region. The copyright law’s exist ence is in connection with the totem poles, those symbols of totemism which are peculiar to northern sritish Columbia and Alaska; in fact in no other place in the world did primitive men make representation of totem designs in any mannet nearly resembling the immense cedar poles of the northern part ot! North America. The strange thing is that though much has been written of totem poles, and some pictures of them shown, the exist- ence of copyright has been entirely over- looked. In _ fact, the meaning of these poles, and the strange ceremo- nies attaching to them, have never been made known to the general reading public. Herewith is given for the first time the story of how these primitive peoples of North Amer- ica instituted a copy- right law along exactly the same lines as followed by the white men today. To be the owner of a totem pole was a sign of social position, rank, wealth, and power. Every native above the slave class aspired to raise one some day. In the erection of the pole a great amount of wealth had to be lavished; the more wealth lavished, the greater the owner’s standing in the community. The reader, noting the accompanying photographs, will see how some are much plainer than 898 Archipelago, Alaska, The Haida Tribe of the Prince of Wales on This Design of Totem Pole, Featured by the Very Unusual Addition of a Canoe others. But from the fact that one pole has less carving work done upon it, it must not be inferred that the plainer pole cost less in ceremony. Sometimes a very plain pole represents a greater outlay than a very extensively carved one. When a native decided he would have a totem pole, he and his family, and some- times, in the case of a great chief, the whole clan, set about gathering wealth to meet the occasion. These preparations usually began a year in advance; in some cases so long a time as three years was spent in preliminaries. While this was going on, the prospective owner called in of the artist the tribe, a of a distinctive class whose wages were very high. To the artist the pros- pective owner related all the traditions of each figure and crest he wished carved. The man artist then started to work, spending some- times months on the intricate designs neces- sary. His work was made highly difficult be- cause he must not in any way duplicate any carving already in exist- ence in the region. This rule was very rigidly enforced, marking the first workings of the copyright law in North America. When the art- ist had completed his labors, the prospective owner next called the peewee: oe te song composer, and to him in turn related the traditions connected with the various figures. The appointed com poser went away in solitude and created themes and words to suit the various carvings. When his composing was com- pleted he returned, and the prospective owner called in the singers of his house, varying in number from ten to a hundred The composer at once began rehearsal with these men and women and continued till they were thoroughly trained. The songs became the property of the owner of the pole; the composer did not re ceive royalty. Had a “Copyright’”’

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POPULAR MECHANICS Shortly before the day on which the pole was to be erected, the owner sent out messengers summoning near-by tribes. \hen these were assembled before his house, the owner intrusted to some tribe he particularly wished to honor, the rais- ing of the pole. When this had been set in the ground, the owner related at great length and with considerable oratorical vigor the tradition attaching to each fig- ure and crest carved on the pole, going into great details of his family history to demonstrate his right ae. to carvings, and further declaring them his par- ticular property. This constituted thr register- ing of copyright. This | done, all the gathered people were invited into the owner’s house and seated according to rank. Then began the really ex- pensive part of the cere- * mony, the presenting of cifts gathered in the last { year or more. In days be- : fore the white man came, these consisted mostly of furs, sometimes rare foods and canoes. In re- cent times, the gifts have heen white man’s blankets and money. In making this great display, a na- tive would impoverish not only himself, but some- family, and times his - — ee Left: Another Tsimshian Pole. Right: The Tlingit Tribe is Represented by This Simple Design FA PHOTOS COPYRIGHT, WM. BEYNON SON even clan. At the conclusion of the gift giving, great quantities of food were handed around. The eating concluded, the singers then related the history of the pole and its owner's rights to the various designs in use upon it, in which words and music they were so thoroughly drilled by the composer. They also declared the owner’s sole right to these songs. Thus the totem pole was erected among the Tsimshian, Haida, and Tlingit Indians of Britg@ ish Colum bia and These Four Poles, Executed by Various Clans of the Tsimshian Tribe, While Showing the General Char- acteristics of Totemism, Well Illustrate the Individual- ism That the Stringent Copyright Rules Enforced Alaska for hundreds of years before the white man came, and copyright declared upon totem-pole designs and songs. The past tense has been used through- out, for though an odd totem pole may still be raised among some of the very primitive tribes, the custom has prac tically passed, through the natives’ intet course with the white man. In fact, the Canadian government has stopped the natives impoverishing themselves by such ceremonials, which have been commonly known among white men as “potlatches,’ though their significance has been entirels lost upon the egotistical white man, for the most part contemptuous of the native to inquire closely into his doings So, soon the Indians who first intro duced the law of copyright will cease to need it. too

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POPULAR MECHANICS BP * a poe a. Ys GES 5 ew Left: A Magazine Cover and a Color-Harmony Testing Disk, on Which the Colors are Arranged in the Same Proportion as They are Used on the Cover. TROUT SORTED INTO SIZES BY ROLLER “SIEVE” Trout will automatically sort themselves into different sizes at the fish-hatchery pools, if a lately invent- ed roller “sieve” is in- stalled. The ouffit consists of a boxlike structure, in one side of which are fit- ted numerous tubular brass rollers. When the sieve is placed in a trout pool, the fish, fol- lowing their instinct to swim up- stream, al- ways attempt to get through the rollers. With the boxes set in various locations in the pool, connected by channels through which a current of water is flowing, it is said that in 48 hours the trout will have sorted themselves into their several sizes. HARMONY OF COLORS TESTED BY REVOLVING DISK It is a well-known fact that a pleasing harmony of colors attracts the eye much as musical harmony pleases the ear. In order to. test the harmony of color com- binations, a machine has been devised with which a colored disk is revolved rap- idly so as to cause the colors to merge, and this visual mixing of the colors gives the same result to the eye as would the actual The Disk is Then Placed on the Machine and Revolved and the Resulting Color Determines If a Proper Harmony Exists. Rapidly, Right: The Revolving Disk and Control mixing of the colored inks themselves. When a disk made up of the proper areas of harmonizing colors is revolved, a pleas- ing shade of gray develops. If this pleas- ing gray does not develop, it shows that a wrong combination of colors has been used, and that the color scheme is not at- tractive to the visual sense. COIN-COLLECTING APPLIANCE FASHIONED LIKE SCOOP A new coin-collecting appliance has re- cently appeared on the streets of Boston, Mass., and was in- vented by a man of that city. The out- fit is made of tin fashioned in the shape of a large Scoop, open at the top,in which the passers-by are asked to toss pennies, or larger coins, for the bene- fit of disabled soldiers. @ The devel- opment of an electrochemi- cal process for the manufac- ture of metallic calcium and of 97.5-per- cent caustic soda, free from chloride of soda, has recently been announced. The new process is claimed to be much cheaper than those now in use. Further information may be obtained from the fuel division of the Department of Com- merce and Labor.

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POPULAR MECHANICS 901 MACHINE WITH CENTER DRIVE erate simultaneously at each end of a LIKE TWO LATHES IN ONE piece of work, The machine is specially adapted for turning shafts, such as axles A new type of lathe with the headstock where no work is to be done at the centet ind drive at the center, and a tailstock portion, but similar work at each end. at each end of the ma- a sneiiens aed chine, is now on the mar- : ket. The headstock is very short, and carries a chuck at each end of the spindle, which is of cast iron and hollow. It is driven by a motor at- tached to the rear side of the lathe bed, and con- trolled by a treadle at the front of the machine. There are two carriages arranged to receive spe- cial magazine toolholders and with automatic-fee : ; pyar as oe T : : “ c-feed Front View of Center-Drive Lathe, Specially Designed for Turning Both devices. I ey W ill Op- Ends of Any Kind of Car Axles: Its Central Headstock Is Very Short WORN-OUT AUTOMOBILE TIRES USED TO BUILD FENCE W orn-out automobile tires have been used in the construction of a strange-appearing fence around an oil-service station in one of the western states. This station is situated in a rather remote locality, and as touring motor ists purchased new tires, they usually gave the old ones to the service man Instead of selling them for junk, the service man constructed a fence h ving 4 by 4-in. posts and a 2 by 3-in. railing, into which spikes were driven to Fence Constructed of All Sizes and Makes of Discarded Auto- support the hundreds of dis mobile Tires Which have been Nailed to the Wooden Railing. Nearly 300 Tires, Whose Original Value has been Estimated at carded tires of all sizes and More than $6,000, Form This Strange Fence makes. 7 @ FIVE TRACTORS REDUCE FARMING TO A SINGLE OPERATION EMPLOYING five tractors for only a few days in the spring, a western rancher performs at one time all the operations of spring planting on a 1,500-acre farm. The first tractor pulls a gangplow which turns the earth; the second draws a disk harrow, and the third pulls a spiked cultivator which finishes the preparation of the soil. The fourth tractor draws a seeding machine, while the fifth tractor, bringing up the rear of the pro- cession, pulls a drag for covering the seed.

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902 POPULAR TINY PILE DRIVER DRIVES PIPES AT POLE BASE Much of the labor and 90 per cent of the time required to drive ground pipes at the base of poles along electric trans- Th, i i 1 Ty, bdsesesierei Miniature Pile Driver, Illustrating the Method Em- ployed by Linemen in Driving Ground Pipes Instead of Using the Sledge Hammer mission lines have been’ eliminated through the invention of a portable pile driver. It trims down the old working time of two hours to 10 or 15 minutes, de- pending on the nature of the soil in which the work is done. The old method was slow, clumsy, and exhausting. The work- man was supported by climbers and a safety belt, and while thus held in posi- tion, he had to swing a heavy sledge. Often, because of his failure to strike a square blow, the pipe was bent or mashed. The new device consists of a piece of lineshaft, about 3 in. in diameter and 18 in. long. It is attached to a steel guide rod that will enter a 1l-in. pipe without rubbing. At the other end, an eyebolt al- lows a rope to run through a pulley, sus- pended froém the crossarm, to the ground man. The latter, by pulling down on the rope and releasing it, drives the pipe from 6 in. to 12 in. at each stroke. The new method protects the worker and keeps the pipe and pole in better condition, MECHANICS PROCESS FOR THE RECOVERY OF OXIDIZED COPPER A patent has been granted on a process for the recovery of copper from oxidized ores in which the basic reactions are be- tween the copper, metallic iron, and a little free acid. The finely crushed ore is heated to about 70° ia (150° F.) in agitating tanks containing finely ground metallic iron and a small amount of fer- rous sulphate. The copper is precipitated as a cement copper, and can be recovered either by washing or by flotation. The process is a regenerative one, it being necessary only to add metallic iron with each new charge. PROPELLERS CIRCULATE AIR TO HEAT ORANGE GROVE Saving the citrus fruit from damaging frosts is the aim of a California inventor who has produced a huge fan, or pro- peller, which is mounted on a _ 20-ft. tower. An electric motor is installed to drive the propeller blades, which are so constructed that they draw the warmer air from above, and circulate it through- out the grove. In extremely cold weather, large heaters will be placed under each fan, and it is claimed that four towers of this description are sufficient to serve a 10-acre orange grove, Large Propellers, or Fans, are Mounted on High Towers for the Purpose of Saving the Citrus Fruit from Damaging Frosts

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POPULAR MECHANICS 9033 Left: The Back and Front Views of the Machine Give a Good Idea of the Heating Space and the Steaming Compartment. Right: In Operation the Tank is Filled with Water, and the Cord is Attached to Any Light Socket. The Resultant Steam Quickly Loosens the Paper, Thus Facilitating Its Removal AN ELECTRIC STEAM MACHINE find that they had been defrauded. Evi- FOR REMOVING WALLPAPER dently the perpetrators trusted that the illegal nature of the purchase would re- The tedious task of removing wallpaper strain the victims from advertising the can be made a comparatively simple oper- nature or existence of the swindle. ition by the use of a recently invented _— machine. This little device weighs only 3 Ib., is easily portable, and operates from any electric-light socket. It is equipped with an electric heating element to generate the steam, which penetrates and loosens the wallpaper, making its re- moval a simple matter. It operates equally well on the walls or ceiling, and because of its construction is not a fire hazard, the temperature never being higher than the boiling point of water. BOOTLEGGERS USE TRICK CAN FOR SWINDLING CUSTOMERS At Newark, N. J., the weights and measures officials seized 42 short-meas- ure 5-gal. cans which were apparently de- signed to perpetrate a profitable bootleg- ging fraud. A small chamber of about a quart’s capacity was provided just below the screw-top opening, which was to be filled with liquor, the remainder of the can being filled with water. The cus tomers were allowed to draw from the can a sample of the excellent liquor placed in the small cavity, and gain the Five-Gallon Can with Sides Cut Away to Show the Arrangement Devised for Swindling Purchasers of impression that the can contained 5 gal. Liquor: The Small Cavity Just below the Screw Top = was Filled with Whisky, the Remainder of the Can Containing Water of it. This they would pay for, later to

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D0 POPULAR SPECTACULAR JUMPING STUNT FINALLY ENDS IN DEATH Spectacular jumps, or dives, from a small platform placed at the top of an 80-ft. ladder into a net below, was the Spectacular Jumper Shown in Mid-Air Just After He has Dived from the Small Platform at the Top of the 80-Foot Ladder chosen occupation of a father and three sons in different parts of the country. Advertised as the main attraction at county fairs and exhibits, these men pur- sued their hazardous calling until finally each, through slight miscalculation, failed to land in the net and was instantly killed. PRESERVING CRYSTAL PALACE TOWER TANKS FROM RUST Everyone who has seen the world-re- nowned Crystal Palace, near London, Eng., which was, 70 years ago, the first structure ever built for an international exhibition, will remember the great crys- tal towers that flank either end of the main building. Each of these high towers, built entirely of glass in what looks like a very slender iron frame, carries at its top a wrought-iron tank, 47 ft. in diameter and 38 ft. deep, with a capacity of 250,000 gal. of water, which is the source of sup- MECHANICS ply for fire hydrants, for blowing the great organ in the palace, and for the extensive fountain system in the palace grounds. Recent examination showed that the long-continued process of rust- ing had reduced the thickness of the tank walls from 25 to 30 per cent. On account of this dangerous weakening of the tank plates, it is now proposed to reduce the water pressure within them by reducing their depth. This would be simple enough if it were not for the fact that a weight equal to the weight of the tanks when filled with water is needed as sta- bilizers for the towers that are so large in proportion to their small weight. There fore the difficulty is to be overcome by filling a large part of each tank with cement, which will reduce the water pressure in the tank while maintaining the pressure at the points of delivery due to the water head. GAS BURNER IS ADJUSTABLE FOR ANY PRESSURE High gas bills are caused chiefly by the gas burner being more than 11, in. from the cooking utensil, according to recent investigations made by the Depart ment of Agriculture, the Bureau of Stand ards, the Bureau of Mines, and the Ohio State University. As a remedy for this condition, a burner has been produced that can be adjusted to give the correct EFFICIENT * = eve 4! Or 9 W CORRECT At the Top is Seen the Adjustable Gas Burner Which can be Screwed Up or Down, to Reach the Correct Position Shown Below height of flame, by being screwed either up or down, in accordance with the pres sure, and which can be fitted easily to any gas range now on the market in a time and with but slight cost. short

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POPULAR MECHANICS 905 PACK RUGS IN PAPER TUBES FOR SAFE SHIPMENT Packing rugs in paper tubes so - 5; that they will be kept clean and : ‘a protected from injury during ship- I i ment, is the method employed by | § ; a western concern. The tubes are des 4 if ie be . y of a suitable diameter, in length equal to the width of the rug being shipped, and made in two sections. Either of the sections can easily be removed by the dealer for display purposes, and then be replaced for delivery or reshipment. ‘ : > j %@ . a ‘ + @A British concern has succeeded in producing a paint pigment of ‘oa ii white oxide of antimony which , has none of the unsatisfactory ' features of paints formerly made with this compound. Paint made with it is said to be nonpoisonous. Paper Tubes in Which Rugs are Packed for Safe Shipment: One Section of the Tube can be Removed for Display Purposes THREE-WHEEL ROAD ROLLER HAS ENGINE AT REAR \ new design in gasoline-driven road _ flexible machine, capable of turning in a rollers, while it is unconventional, pro- small radius, which is a very desirable . thing in machines of this character. The roller is controlled much in the manner of an automo bile, and the driving wheels are equipped wit! a differential which can be locked with a pin in case it is necessary. The Above: By Placing the Engine at the Rear of This Three-Wheeled Gasoline Road Roller, the Wheelbase is Greatly Reduced, with a Consequent Increase of Flexibility. Below: Drawing a Scarifier. The Short Turning Radius Makes This Roller Particularly Useful for Road Work duces a machine of exceptionally short engine, transmission, and control are wheelbase by placing the engine at mounted on a subframe which is carried the rear. This feature makes a very on three-point suspension.

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906 POPULAK EMPLOY STEAM-OPERATED AX FOR CHOPPING REDWOOD Because of its fire and acid-resisting qualities, redwood bark is a_ desirable material for use in the manufacture of This Steam Ax Operates like a Steam Hammer, and is Equipped : with a Four-Bladed Bit for Chopping Redwood Bark to be No Used in the Manufacture of Roofing Material felt for roofing material, but it must be reduced to small pieces before going to the pulp machines. As a first step in the operation, one company uses a steam- operated ax for chopping the large slabs of bark as they are received. The steam ax is patterned aiter the familiar steam hammer, but is equipped with a four- bladed bit for cutting. A heavy shield ind screen protect the operator. NEW NONINFLAMMABLE GAS PRODUCED FOR AIRSHIPS Announcement has recently been made of the production of a new lifting gas for airships which is claimed to be non- inflammable and nonexplosive, and to have a lifting power almost equal to pure hydrogen. The gas is made by an electro- lytic process, and it is said that it can be produced at a much lower cost than an equal quantity of helium gas produced at the Fort Worth helium plant. MECHANICS STAINS ON LEATHER REMOVED BY SOLUTION OF RUBBER New methods for the removal of stains from leather goods have been developed by the Bureau of Chemistry of the Department of Agriculture. For the removal of grease spots ot any kind from any leather article, the best method has been found to be to coat the leather with a thick solution of rubber, in which the solvent evaporates rapidly When almost dry, this coating peels off quickly and removes the Stains with it. In excep tional cases it may be necessary to repeat the operation several times. The solution recom- mended is composed of unvulcan- ized Para or Ceylon rubber in the proportion of one part to ten by weight, of carbon bisulphide The fumes of this solvent are very inflammable and poisonous, and it is, therefore, essential to work at a distance from fire, and where the ventilation is good. Just be- grease fore applying the solution, the leather should be made slightly wet to prevent too strong ad- hesion. SHOW HOUSE NUMBER ON CURB TO GUIDE MOTORISTS longer will the motorist driving in a strange neighbor hood be compelled to peer along fron house to house searching for the num ber, if a tem devised by a western man is adopt- ed. Witha set of stencils he marks the house number on the curb in figures that are plainly visible from a passing auto- mobile, lanip- black and oil being used for the marking. SVYS- @ France has decided to sell her govern ment-owned railroads, as the operation under government ownership has not proved entirely successful.

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POPULAR MECHANICS 907 LOCOMOTIVE EXPLODES WITH UNUSUAL VIOLENCE Top of the Cab Blown 25 Feet across the Track, When the Locomotive Boiler Exploded with Great Violence While on the Track The Locomotive Boiler That was Blown Clear of the Frame and Hurled to a Distance of 100 Feet, is Shown Where It Landed While standing on a siding at Egypt, Miss., the boiler of a Mobile & Ohio locomo- tive recently blew _— es aye ae napa - a : Wi ‘Loe en. Locomotive Frame an art of the Smoke Box That Re- ; onmew eitel up, killing the en mained Standing on the Track After the Boiler Exploded : running gear, with Fineer, injuring The Engineer was Killed and the Fireman Injured part ot the smoke three other men, box, remained on and wrecking the locomotive in a most the track. The force of the explosion was sensational manner. The boiler itself so great that windows were broken two was blown clear of the frame to a_ miles away. distance of 100 ft The top of the cab was blown 25 ft. across the track. The loco- motive frame and JAPANESE HYDROGLIDER IS BUILT LIKE AN AIRPLANE AN amusement device has made its appearance in Japan which gives nearly all the thrills of flying but with the element of danger practically removed. It consists essentially of a tandem biplane carried on a float and propelled by an airplane motor. It has a seating capacity of about 20 persons, and instead of rising from the water, it glides over the surface at a fair speed.

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908 SCREWDRIVER WITH HANDLE THAT IS ADJUSTABLE Carpenters and mechanics will find use- ful a new screwdriver that is double-act- ing. It can be used like any ordinary straight-bit screwdriver, or by pressing a catch with the thumb or finger, the handle can be turned at right angles to the bit, en- |’ abling the | ia operator to | apply much u more force, and thus do = work with one hand that, with the old-fashioned tool, would require two hands, and possibly the help of a wrench besides. a” AeA ee POPULAR MECHANICS At the Left are Shown the Falsework of the Bridge and the Concrete Span Which Fell into the Water When Fire Destroyed Its Supports. Above is Seen the Concrete Span, Which Measured 12 by 12 Feet at Its Base and Tapered to 12 by 6 Feet in the Center FIRE CAUSES FALL OF HUGE CONCRETE SPAN Salamanders used to keep the concrete from freezing caused a bad fire in the falsework of the new Cappelen bridge now in construction at Minneapolis, Minn. The centralarch span of this bridge, which is to span 400 ft. of the Mississipp1 River, had been poured the day before. A heavy wind coming up the river, turned over a salamander and before the work men could guard against it, a fire had been started in the scaffolding and surrounding canvas. Firemen rushed to the scene, but difficulties in reaching the flame prevented its immediate extinction. Nearly half of the 400-ft. arch was torn loose from the and fell when the falsework was burned from under it. The damage done is to be repaired immediately, but no more chances are being taken on another such accident in the future. A fire hose has been placed ready for service at a moment’s notice. stove, piers, TO INVESTIGATE MIGRATION OF INSECT CORN BORER Because that insect pest, the European corn borer, has made its appearance in a narrow strip extending practically the entire length of Lake Erie, investigation is to be made to determine if the moths of this insect fly across. the lake. If per- mission can be obtained, observers will be stationed at the lighthouses along the American shore, in the belief that the moths will be attracted by the lights.

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KUDZU FORAGE PLANT AND SOIL BUILDER By C. E. PLEAS AN ARTICLE on kudzu, the remarkable forage plant which promises so much to North American agriculture, appeared . in the July, 1919, issue of this magazine. It attracted widespread attention and was received with such eagerness that, departing from our customary policy, we are again covering the subject with an article written by Mr. C. E Pleas, the man responsible for bringing the plant to the attention of the public and the recognition of the farming industry Editor plants, kudzu might properly be son regardless of the weather, as a ‘alled a typical American crop, not be- shower of rain does not ruin it. And it is cause it originated in Amer- ; most palatable to all farm ica, but because it seems animals, and has a feeding adapted to all well-drained , value equal to the _ best » oils in the United States, wheat bran, containing as from coast to coast, and an average 17.63 per cent from the Gulf to northern protein. Maine. No other fodder, While kudzu is a peren hay, or pasture plant is nial that trails on the adapted to such a_ wide ground, rooting at th range of territory, nor able joints, it is in no sense a to adjust itself to such a pest, but can be easily kept variety of conditions. in bounds or killed. It It is a perennial legume never spreads from seeds or of most marvelous growth underground runners, nor and hardiness, able to will a root sprout when cut withstand the coldest as off a few inches below the well as the hottest tempera- crown. tures found in the United Under very favorable con States. It does not require ditions, some remarkable iming or heavy fertilization, yields of hay have been nor is its growth restricted made, but under norma! to some particular soil or conditions kudzu should climatic condition. Like ET Ee yield, in two cuttings a year other leguminous plants, it from the Joints of the Vine with from four to six tons pet carries nitrogen-absorbing the Nitrogen-Gathering Nodules acre It cuts <asily and does . Appearing on the Roots o* not drag ahead of the mower ANKING high among the forage may be cut as hay at any time of the sea

icteria on its roots, mak- ng artificial inoculation unnecessary. It blade. It cures the quickest and bright may be planted in poor, rocky, hilly, est of any known legume hay. tumpy, or worn-out fields and still make As a soil builder or veclaimer, it prob reasonable return in hay or pasture. It ably has no equal. It has immense roots

A Field of Kudzu Growing Waist-High: This Hardy Plant Needs No Cultivation, and Is a Soil Builder Because of Its Ability to Extract Nitrogen from the Air and Add This Essential Element to the Soil

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910 POPULAR that penetrate deeply into the subsoil, and through the medium of the bacteria on its has the power of extracting nitrogen from the air and adding this es sential element to the soil. Yields of 40 to 50 bushels of corn are ual fol- lowing kudzu. roots MONORAIL DUMPING PUSH-CAR NOW IN USE IN GERMANY For use on farms, as well trial enterprises, a small sing ing car has been constructed as in indus- le-rail dump- in Germany.

It is Pushed, with the Pole At- Push-Car Used in Germany: Dumped and Righted Monorail and Also tached to One Side of It. It can be Slung on or off the Rail A long pole attached to one of the four sides of the body of the car is used for pushing it, and also for dumping and righting it. The body is supported on small flanged wheels that travel on the single rail. It is also provided with a sling for lifting or removing, RAPID METHOD OF CHANGING SCENES ON BERLIN STAGE There has recently bee Berlin a series of « craft that, it is n completed in <periments in theater predicted, will revolution- ize the ordinary methods of scene shift- ing. The time and labor involved by these methods of changing scenery are completely avoided by placing on the main stage a number of smaller ones, each with a complete setting of scenery required by the different acts. These smaller stages are mounted on rails so that they can be wheeled back, one after another, leaving only the required setting mi view of the audience,

MECHANICS

SOAP BUBBLES USED TO STUDY EXPLOSION OF GASES Everyone who for his automobile has a direct concern in the efficiency of engines, the study of which buys gasoline is being assisted by soap bubbles. These ire now being used at the Bureau of Standards in determining the rate of propagation of flame in combustible mix- tures of gases. Strangely years there been whereby explosions could be enough, for has sought a means studied un- der constant pressure free from compli- cating circumstances, but it was just recently pointed out at this institution that soap bubbles afford in ideal fashion just what is wanted. In these experiments a bubble, about 8 or 10 in. in diameter, is blown with the gaseous mixture around a special form of spark gap, adjusted to its center. This is set up behind a containing a narrow horizontal slit on a level with the center of the bubble, and upon which is focused a camera. The film of the camera is set in motion in a right angles to the slit, and a spark is passed through the gap, causing the bubble to explode. The progressive ignition of the gas appears through the sl line of light beginning at the spark gap and ex- tending in both directions along the slit, and as the film is moving while this is roing on, the resultant image on it takes the shape of a wedge, the exact form of the data Contrary results obtained under other con the velocity of propagation in screen direction at it aS a W hich to the ditions, fives desired. mixtures so far investigated is uniform.

Photographic Record of Two Soap-Bubble Explosions Viewed behind Slit: The Straight Sides of the Wedge Indicate That the Explosion is Propagated Uniformly

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POPULAR MECHANICS 911 USE ROLL-CHANGING MACHINE IN MAKING ROOFING The base of many pre- pared roofings is felt which is treated with various substances to render it water and weatherproof. This felt is received at the manu- facturing plant in large rolls, called “jumbo” ‘ A Fresh Roll of Felt has Just been Placed in the Holder, and as the Upper Roll is Exhausted, the Holder is Revolved to Make the New Roll Available ess should be continuous, so the rolls are carried on large spiders in such a way that as one roll is unwound another can be started through the tanks without stopping the ma- chinery. The holder is so arranged that the new roll can be moved into The Roll of Felt Going to the Treatment Tanks is Nearly Exhausted, and the Roll Holder has been Revolved to Bring the New Roll into Position, Where It can be Stcrted without Stopping the Balance of the Machinery, as It Is Vesirable to Have the Process Continuous position without being lifted from the floor, and rolls, which are unwound, and the strip of felt is passed through the treatment tanks, It is very desirable that this proc- the roll holder can be revolved when needed without interfering TIRE REPAIR WITH COMBINED JACK AND RIM CONTRACTOR For the motorist, a handy tool that serves two purposes is a combined jack and rim contractor to facilitate the re- moval of a tire for repairs. The jack is of the gear-operated screw type, the operating gear in connection with the hand lever being engaged by a double pawl, allowing the jack to be used for pushing when it is lifting the car, and for pulling when it is contracting the wheel rim. At the base of the jack are two pivoted arms with braces that slide in a rack on each side of the jack, so that these arms can be extended horizontally to support the jack when lifting the car, or at an angle of about 45°, so that their ends can be hooked over the wheel rim with the operation of the rest of the process. when used as a contractor. At the end of the jack is also a hook which engages the top of the rim and pulls it downward. Combined Jack and Rim Contractor, Shown at Left in Use as a Jack, and at Right as a Rim Contractor, to Facilitate Tire Removal for Repair Work

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v12 POPULAR LADDER HAS AUXILIARY LEGS TO PREVENT ACCIDENTS Accidents may be prevented by the use of an adjustable ladder fitted with auxiliary legs for the purpose of assuring a firm support on ground that is not level. The legs, of which there are three, are fas- Ladder with One Side off the Ground, but Firmly Supported by the Auxiliary Legs and the ear Leg Above, the Ladder is Set Up on Uneven Ground, and Below, It is Folded for Car- rying tened to the ladder body, one on each side at the base and the other at the top, and the former can be adjusted along the sides as desired, being held firmly in place by a sliding spring-pawl arrangement. For carrying, the legs are folded. “SURVEYING” TEST DRILL HOLES AN INTERESTING PROCESS In examining the structure of a rocky crevice in a proposed dam site on the Colorado River, in northwestern Arizona just-recently, engineers made the usual test drill holes in the bottom to a depth of from 50 to 100 ft. Desiring to check the theory that the stream crevice or canon itself mignt be a fault line, slanting drill holes were made, in both directions, athwart the stream, to a sufficient depth to intercept the fault escarpment beneath the water, if any were present. At first thought, it might be assumed that such drill holes would sag, and curve downward w*th the weight of the drills MECHANICS and drill rods, though the fact is, the whirling of the drill rods and their knock- ing against the walls of the drill holes, tend to lift the drill point so that the drill hole curves upward; the nearer the horizontal, the greater the rise per unit of distance, ordinarily. “Surveying” the drill hole is the deter- mination of the exact direction and posi- tion of the drill hole at all points, whether to right or left, or above or below the line projected from the starting point of the drill hole. To do this apparently impos sible job of measuring, it is only neces sary to fill a long slender glass tube or bottle with hot water, containing a small amount of melted paraffin and also a float ing spirit level, with a compass needle attached, the spirit level being so adjusted as to float in liquid with the bubble in a central position. This bottle, by means of a bail or attachment, is let down on a measuring line, and‘brought to a stop at certain intervals, usually not less than 5 or 10 ft. Here it is held quietly until the paraffin sets by falling temperature. On being hauled to the surface, it is easy to bring the spirit level to a level position, HOLE ‘ SPIRIT LEVEL AND COMPASS PARAFFIN —== SLANTING DRILL SURVEYING BOTTLE \ CANON OF THE COLORADO RIVER HOT WATER CANON WALL COLORADO RIVER WATER LEVEL DIAMOND-DRILL — TEST HOLES Diagram of Slanting Drill Holes Which were Made to Test the Rock for a Dam Site: Insert Shows Method of Surveying Holes and the compass, compared with a free compass, into the magnetic path, and ob tain the angle of the hole at that point, from both base lines, vertical and horizon- tal. This is repeated for the entire lengt! of the hole, and its exact position charted @Write our Bureau of Information, if you wish to know who makes or sells any article described in this magazine. Send no postage; the service is free.

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POPULAR MECHANICS 913

Ee pe

ol <e © nt SB

Ditcher in Operation, Showing How the Machine Throws Half the Dirt on Each Side of the Ditch When Operated in Alternate Directions: The Ditcher can be Used with Equal Effectiveness on Either Level Land or on Any Hillside Where a Team or Tractor can be Driven HILLSIDE AND TILE DITCHER DOES WORK OF MANY MEN Digging ditches for the laying of tile can be rapidly accomplished with a new implement which will dig a trench 30 in. deep and any desired width, requiring only one man to operate it. A specially designed share cuts the dirt and throws it into a bull wheel which is equipped with container compartments, or pockets. These pockets carry the dirt upward and deposit it upon a horizontal throw-off table, which is revolved by gears con- nected with the bull wheel. The outfit has a leveling arrangement that keeps the bull wheel and cutting tool vertical at all times, regardless of the depth of the ditch or the slope of the ground. TOWER TESTS WATERPROOFING MATERIAL FOR CONCRETE While concrete is ordinarily thought of as a solid, impervious material, there are, in fact, many small openings in it through which water can find its way, and this makes it unsuitable where a waterproof structure is required. This has led to a search for some substance which can be mixed with the concrete to fill these tiny openings and make the concrete water- proof. One company doing this experi- mental work has constructed a_ water tower in five vertical: sections, two of which are made of ordinary concrete and

the other three of mixtures containing some form of waterproofing material. By filling the tower with water, the effect the different materials have in preventing the water from finding its way through the concrete can be studied.

While the Water in the Tower Seeped through the Untreated Concrete, the Waterproofed Sections Showed No Sign of Moisture on the Outer Surface a a

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914 POPULAR 7° oa bs SS » wee | ed et Y man : MECHANICS iew of Lincoln Park, Lake Shore Drive, and Lake Michigan Roof of Proposed Chicago Hotel, Showing Two of the Five Bungalows Which will be Placed on the 7% of the Structure, According to the Present Plans of the Builders: The Hotel will be Located Where the Occupants of the Bungalows can Have an Uninterrupted NEW CHICAGO HOTEL WILL HAVE FIVE BUNGALOWS ON ROOF Five bungalows, per- golas with climbing vines, sunken gardens, fountains, handball and tennis courts, will change to a scene of great activity and beauty the top of a new hotel which is to be built in Chicago during the summer of this year. These bungalows will have many special elec- trical features that will make them highly at- tractive and convenient. The unobstructed views from the windows will furnish an added charm to these ultramodern homes, commanding a vista of Lake Shore Drive with its parks and water front. It will form a noteworthy addition to the list of new Chi- cago hotels. HISTORIC PINE TREE- LIVED 1,200 YEARS Twelve hundred years was the age of a historic old pine tree which grew on the edge of Lake Biwa, in Japan, and which recently died. Be- ing famous in song and legend, the tree was vis- ited by thousands of pilgrims every year, and was tlie center of time- honored religious cere- monies. The ancient pine was of the low spreading variety, at- taining a height of only 30 ft., but having a spread of 163 ft. from east to west, and 154 ft. from north to south. Another tree, 350 years old, will succeed to the near-worship which was formerly bestowed on the dead pine.

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POPULAR BLOODED CATTLE IDENTIFIED BY MEANS OF NOSE PRINT Nose prints of cattle are the latest means of identification used to determine the authenticity of any claim that an animal has a blooded MECHANICS 915 COMBINED TRACTOR-SNOWPLOW CLEANS CITY STREETS Added proof of the versatility of the modern tractor is given in the produc- tion of a snowplow at tachment,

pedigree. This method of identifying cattle was adopted by a University of Minnesota professor, who thus utilized a vari- ation of the familiar Ber- tillon system employed by the police in catalogu- ing humans by finger prints. Since the inaugu- ration of the system a few months ago, some 500 prints have been taken, and the _ closest examination has failed to reveal a duplication among the different breeds. Neither has there been found any change in the design as the animal grows older, o that a print attached to a registration certificate, at once identifies and prevents the substitution of inferior cattle. THOUSANDS OF PIECES USED FOR INLAID TABLE TOP \n Idaho man has recently completed an inlaid table top, on which he spent two years’ time in making the 12,215 pieces in its construction. Assembling the many parts was accomplished in seven days, and the finished product includes a checkerboard, at which game _ the patient worker will no doubt now spend his idle hours,

Wo SS \ \S RAH ROSS Say SSH MSMWWMMOAN 73317) yyy) yy i ee < ~ AS Wow WW ie } } '

Combined Tractor-Snowplow in Operation, Showing the Method of Attach- ing the Plow to the Front of the Tractor, and Also How It is Weighted which is manufactured by a Pennsylvania company. The arrangement is fastened to the front of the implement and heavy weights are placed on it, after which good results are obtained in clearing the sidewalks and streets of blockading snow- drifts. DISCOVERS NEW ATTRACTIVE NONMAGNETIC FORCE A statement has recently been made that a German scientist has discovered new attractive force which is nonmag- netic, and yet which causes attraction be- tween, not only iron, but also all other metals and even minerals. It is believed — that it will find imme- diate application in wire- less telegraphy and te- lephony, as the energy requirement is from 300 to 500 times less than that of ordinary electro- magnets for the same purpose. It is also claimed that this discov- ery will make possible speed of 2,000 letters per minute in telegraphic writing. | @There has been in- | stalled at the University

Inlaid Checkerboard-Table Top, Constructed of Many Thousand Pieces by an Idaho Man: The Design Attained Is Quite Intricate and Testifies to the Patience of the Maker of Indiana complete equipment for the analy- sis of oil shales.

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v16 POPULAR PROSPECTIVE RADIO CUSTOMERS LISTEN WHILE THEY SHOP The widespread interest in wireless- telephone outfits is intensified by the methods used by a specialty shop in srooklyn. Here the salesmen and the customers are alike supplied with receiv- ers, and they can thus pick the messages from the air and discuss the possibilities of this new feature of modern life. In this practical manner the prospective cus- tomer is brought immediately into touch with the magic of the air, and is elated with the simplicity of it all. FLOTATION PROCESS ADAPTED FOR CLEANING COAL Recent investigations by the Bureau of Mines have shown that the flotation process which is so successfully used in the concentration of metallic ores can be used for cleaning many Ameri- can coals of part of their ash and refuse content. Experiments on coals from the state of Wash- ington showed that this process would eliminate much ash which was not removed by washing in jigs. The investigation did not cover the commercial phase of the problem, and the success of this method will depend on the cost as compared with the pres- ent cost of putting clean coal on the market. The problem of cleaning coal becomes more im- portant as the present coal areas The Prospective Customers are Furnished with Receivers So They can Listen to the Wireless Messages and Discuss with the Salesmen the Merits of the Different Receiving Sets being Shown MECHANICS GREAT LOSS OF NATURAL GAS CAUSED BY “WILD” WELLS It is estimated that five “wild” gas wells in one field in Louisiana alone are allow- ing 30,000,000 cu. ft. of natural gas to escape daily, and steps are now being taken by the State Department of Conservation to curb this waste. The wells went wild owing to faulty drilling methods in use a few years ago, as the cas- ing was not cemented and the gas blew out be- tween the joints and caused a crater to form around the casing. At present some of these craters are as much as 250 to 300 ft. in diameter and are filled with mud and water. The gas tad escaping through this mixture gives the craters the appearance of boiling caldrons, and the roar can be heard a half mile away. In one case the derrick and drilling tools dis- appeared in the crater. TRACK TREADS GIVE TRACTOR GREATER PULLING POWER A new attachment designed to give the small tractor greater bearing area and in- creased pulling power, replaces the round wheels with two large sprockets. Outside of each sprocket is a cast-steel arm which projects forward and downward, carry ing at its front end a smaller idler wheel. A track tread passes around the sprocket and idler wheel, giving the tractor in- creased bearing area. . — are mined out and _ higher-ash coals come into use. The Large Ss rea ets Replace the Round Wheels, and the Track Increases the Bearing Area on the Ground

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POPULAR MECHANICS 917 Above: Automatic Car Dump, Showing an Empty Car Which has Just been Elevated to the Track by the Weight of Another Loaded Car being Dumped. In Front of the Car Is a Compression Cylinder Which Brings the Dump to Rest J NEWLY DESIGNED CAR DUMP WORKS AUTOMATICALLY An automatic car dump with several in- teresting features has been constructed re- cently by a southern concern. In oper- ation, a loaded car runs on the dump where a trip lever is struck, this action bringing a steel bar in front of the car wheel and stopping it in the proper place. At the same time a latch is released and the dumping mechanism operates. The loaded car is dumped on one side of the track, the weight of this bringing up an empty, previously dumped car on the op- posite side. When the empty car reaches a normal position on the track, its similar steel holding bar is released, and the empty car runs off the mechanism to make way for another loaded one. It is claimed that the apparatus can be ad- justed so as to allow the handling of 10 cars every minute. COPPER-SHEATHED SHIPS MENACE IRON VESSELS When ‘a ship sheathed with copper is moored nearer than 200 yd. from an iron ship the action of the salt water upon the iron and copper generates an elec- trical current which produces electrolysis in the iron hull and destroys it. As a re- sult of this, one of the regulations of the Navy Department is that no ship having a copper sheathing shall be placed inside of yd. of an unsheathed iron ship. Above: Automatic Car Dump, Illustrating the Manner of Dumping the Cars. The Loaded Car on the Left is be- ing Dumped by Grav- ity and at the Same Time Elevates the Empty Car on the Right to the Track. Left: The Dumping Mechanism FIREPROOF FLUE-HOLE STOPS INVISIBLE ON WALL PAPER Fires in buildings have often been caused by papering over a flue hole in a wall without proper protection, and to afford this protection there is now being made an invisible fireproof flue stop. It fits within the flue hole flush with the wall, so that when papered, the surface is Above: Fireproof Flue-Hole Stop being Placed in Hole. Below: Left, in Place Ready for all Paper; Right, being Covered with Wall Paper smooth and uniform with the rest of the wall. The metal stop is covered on the inside of the flue with a mass of fireproof material, so that there is very little pos- sibility that a fire in the flue might ignite the wall paper. on Sagenren reer ey

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918 POPULAR MECHANICS COZY APARTMENTS PROVIDED FOR TOURING MOTORISTS Touring motorists who follow a south- ern route will find in many towns, on the COMPANY WILL MANUFACTURE GERMAN AIRSHIPS HERE An American company has recently acquired the patent and manufacturing rights for the Schuette- Lanz type of rigid air- ships, and two new pas- senger ships are to be designed for this com- pany. Part of the mate- rial for their construc- tion will be fabricated in Germany and part in this country, where the ships will be assembled. That much of the hazard of TS aerial travel will be elimi- nated is forecast by the announcement of the company that it will use helium gas for inflat- ing the airships, which are to be used in com- mercial service between New. York and Chicago. Type of Combined Cottage-Garage, of Which Many have been Built along to Provide Shelter and Comfort for the Numerous Motorists Touring in the Sunny South the Highways in Florida Towns, way to Florida, automobile camps which are equipped with unusual conveniences for the transient occupants. One type of a combined cottage-garage has been evolved with ample space for two cars below, and comfortable living quarters above for two families. Outside stair- ways lead up into these cozy apartments, which are provided with gas, electric lights, and running water. SPHERICAL ELECTRIC FAN THROWS AIR RADIALLY Unlike the ordinary electric fan, a fan, spherical in form, recently patented, is so designed that it throws the air radially from it in every direction. This is made pos- sible by a_ con- struction of the fan blades so that the air is drawn in from above and below the fan, and then thrown out again in a radial stream of the width of the blades. Thus, the fan could be placed in the center of a room, and cool all parts of it equally at the level of the fan. The establishment of other routes will depend on the success of the ini- tial venture. The com- pany expects to have the first two airships in operation by next year. PHONOGRAPHIC SOUND BOX WITH PERFORATED DISKS Anything that eliminates sound waves that are disturbing to those produced by the action of the record itself, in phono- graphic de- vices, will naturally im- prove the re- production of instrumental and vocal music, This is said to be done in a patented phonographic sound box of the usual shape having the usual vibratory diaphragm at one end, and between that and the outlet a series of disks with registering openings, grad- ually decreasing in number toward the outlet, so that the sound waves are not affected by the sound box itself. @Whenever you find that you wish to know more about any article in the mag- azine, write our Bureau of Information.

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POPULAR MECHANICS Above: In This French Airplane, of Unusual Appearance, the Lower Wing Has a Span Greater than the Upper Wing, This Design being Adopted to Equalize the Stresses in the Wings. Right: The Wings are Set Much Far- ther Back on the Fuselage than Is the Case with Airplanes of Conventional ‘& Design AIRPLANE OF FRENCH DESIGN HAS UNUSUAL FEATURES Designed originally as a bombing machine, but capable of being converted for commercial use, a new French air- plane departs from the usual practice which has been followed in biplane con- struction. In this machine the lower wing is of greater span than the upper one, this construction being adopted in order to obtain a more uniform distribu- tion of the stresses in the wings, and to permit the use of wing spars of the same size for both wings. Another remarkable feature is that the wings seem to be placed very far back on the fuselage as compared with other airplanes. NEW DESIGN PROTECTS AUTO TAIL LAMP FROM DAMAGE To prevent the annoyance of broken tail lamps, an English concern has de- signed a lamp of unusually heavy con- struction. The body is formed of two heavy alumi- num castings, and the red glass is mounted be- tween. rubber washers held in place by a coil spring. A white light is provided on each side, one to illuminate the license plate, and one to show the road when the car is moving in reverse. The heavy casting protecting the red glass is held by four capscrews. INGENIOUS SILO TOP MADE WITH HINGED SEGMENTS Quite an ingenious silo top is in use on a farm in Ontario, Can. It is made of a number of triangular segments of metal- covered wood, each con- nected pivot- ally to the circular top of the silo with two strap hinges. These ’ segments are Le sO shaped that when turned down horizon- tally they overlap suffi- cientlytoform a close-fitting weatherproof top. When raised vertically, they are surrounded with wire netting so that the contents of the silo can be piled several feet above the top, leaving the silo com- pletely filled after settlement. en Pe IRON FOUNDRY TO BE ERECTED ON SOUTH GEORGIA ISLAND \lthough usually thought of as a bar- ren waste of snow and ice, it is inter- esting to note that the equipment for a small iron foundry has been shipped to the island of South Georgia—that re- mote spot where Sir Ernest Shackleton was buried. It is to be used for making repair castings for the whaling station at that point or for ships which call at the island three or four times a year. This will be a great convenience for vessels, as this island is 2,000 miles from civilization. 919

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920 POPULAR MECHANICS WIRELESS MESSAGES RECEIVED ON PHONOGRAPH RECORDS In the new wireless station at Lyons, France, two systems of receiving high- speed messages will be employed. One is USE AREAS OF GRAVELLY SOIL TO STORE SURPLUS WATER Because the rainfall of California is confined to a few months in the winter, the conservation of water for irrigation purposes during the dry season is of prime im- portance. Where suitable sites exist, this is ac- complished by building dams to impound the sur- plus water, which is drawn off later as re- quired. Where there are no suitable reservoir sites, it has been found that much of the surplus water can be conserved by spreading it over areas of gravelly soil where the streams emerge from the moun- tains. By this practice the underground forma- These poy ry Run at Much Higher Speed than the Regular Machines, tions hold this water un- and are Used in Receiving High-Speed Radio Messages Which are Recorded and Preserved on the Extra-Heavy Disks the method of making a photographic record on a strip of sensitized paper, and in the other method the message is taken on a special high-speed phonograph. After the message has been recorded on the extra-heavy disk, the latter is placed in a machine running at much slower speed, and can then be transcribed by an opera- tor. The reverse of this system can also be used in transmitting messages at speeds up to 150 words per minute. WOODEN RAILROAD CARS HAVE LONGER LIFE THAN STEEL Recent investigations by one of the large car-building companies have brought out the remarkable fact that wooden cars have a longer life than steel cars. The company claims that many steel cars less than 10 years old have had to be rebuilt, principally because of the corrosion of the roof, and even, in cases, of the principal beams of the car. The conclusions are contrary to the general belief that has been held by engineers in the past. @ Flying recently near Copenhagen, Den- mark, a Rumpler airplane used kerosene as fuel instead of gasoline. A special carburetor was used and the operation was entirely successful, the only noticeable difference being a decrease of 100 r.p.m. in the speed of the engine. til it can be recovered by pumping during the dry season. The method is now practiced on about a dozen streams in southern Cali- fornia, and has been found quite effective. QUICK-CHANGE SET OF TOOLS HAS DETACHABLE BITS Instead of the bulky set of chisels and punches, there is now available a com- pact set in which the different bits can be inserted as desired in a single handle. Seventeen tools are supplied in the set, 7 This Set of Percussion Tools Has Separate Bits Which can be Inserted in the Steel Handle. A Screw- driver Handle is Also Included and it is claimed that, as a percussion tool, each is as rigid under the hammer as the ordinary solid forged tool.

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POPULAR BASEMENT GARAGE FOR No American motorist who has driven in the busy district of any big city has failed to realize the seriousness of the parking prob- lem which the tremendous popu- larity of the motor car has created in recent years. Streets, laid out before motor vehicles were dreamed of, prove utterly inadequate for accommodating the cars which the public would like to park in the business dis- trict. That some solution must OFFICE-BUILDING TENANTS MECHANICS 921 The Space at the Left of This Recently Erected Los Angeles Office Building is Re- served as a Parking Space for the Cars of Clients and Patrons of Tenants of the Build- ing. Cars may be Parked Here Free of Charge for One Hour sands of persons, a large number of whom use motor cars. Not only has provision been made for tenants of the building, but for patrons of these tenants as well, 200 Cars. The Garage Is Directly under the Open Parking Space be found at an early date is manifest. Of peculiar interest, therefore, is the practical solution which has been worked out by the management of a new office building in Los Angeles housing thou- A a se Entrance to the Underground Garage: Broad, Easy-Sloping Ramps thereby siving occupants of this Lead to the Two Floors below Ground Providing Space for Nearly big structure a decided advan- tage over those in other build- ings. In the construction of this skyscraper an underground garage was built at the rear of the lot and adjoining the office building. This fireproof storage space accommodates nearly 200 cars and is Daiergeeus® Parking Space, Where Tenants of the Building may Store heir Cars during the Day: The Construction Is of Concrete, and Fire Protection is Afforded by a Sprinkler System. Windows Opening into a Well along One Side Furnish Part of the Illumination

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922 POPULAR reached from the street by broad ramps. Stalls in the garage rent for $20 per month. Here a moderate temperature obtains at all times, and a car and its con- tents are safe from exposure to the ele- ments, and also from thieves. The ground area immediately above the garage has been made into a fenced-in parking place for the free use of patrons of the building tenants. Outsiders who have business in the building may drive in here and park their cars. Each one is given a numbered claim check, which MECHANICS must receive the signature of the tenant in the building who has been called on. Countersigned thus, it is presented to the attendant in the parking place, and the car owner drives off without paying any parking fee. There is one limitation to this regulation, namely: that a person using the space longer than one hour at a time, must pay at the rate of 25 cents for each additional hour or fraction thereof. This is one of the first, if not the first, buildings in America to work out the parking problem in the Ld bh dbl Lidl bi -.3¢ me ERIN TE a a manner described. Both features—the under- ground garage and the free parking place for tenants’ patrons—are considerations which give this new building a de- cided advantage over older structures. In the short time since this building was completed it has been found that prospective tenants con- sider these arrangements for automobiles a decided advantage which is worth dollars and cents to them. There is every reason to The Parking Space is Protected by a Fence Which Prevents Unauthorized Persons Making Use of It Either for Storage Space or as a Passageway between Adjoining Streets believe that the addi- tional investment will prove a profitable one. AIR COMPRESSOR AND HOIST ON ONE SUPPORT A very compact combination of — an air compressor and _ hoist, the whole built as a unit, is a novel installation that will be particularly useful in all kinds of steel-erection work. The power is furnished by a 15-hp. gasoline engine, which drives the hoist by gears, and the water-cooled air compressor by belting. The com- pressor has sufficient capacity for driving a riveting hammer, or for calking, drilling, or reaming. The hoist is equipped with a drum that holds 700 ft. of -in. cable, and that has a “nigger- head” at each end for handling scaffolding, etc. Both hoist and compressor are equipped with friction clutches, allowing the op- eration of either independently. 7 The whole outfit is rigidly mount- Combination Power-Driven Hoist and Air Compressor: The Gas- ed on a frame made of channel steel. oline Engine at the Center Drives the Hoist with Gears, and the Compressor with Belting. The Whole is Rigidly Mounted on the Steel-Channel Frame * Tt

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-_ 7 POPULAR MECHANICS 925 In “Exposure Parks” like This, Located in Different Parts of the World, Samples of Roofing are Laid Out and Exposed to the Weather, and Their Condition Noted after Months or Years TESTING ROOFING MATERIALS IN “EXPOSURE PARKS” In order to test the wearing qualities of various kinds of roofing materials, one company has established what it calls “exposure parks.” Here the samples of roofing are exposed to the elements and their condition noted from time to time and a record kept. These parks have been established at various places for the purpose of studying the weather-resisting qualities in different climates. In this way the manufacturer is able to advise his customers which roofing is best suited to withstand certain climatic conditions. FLASHLIGHTS USED BY DOCTOR TO COMPLETE OPERATION While an operation was being per- formed on a patient at the County Hos- pital in Urbana, Ohio, the electric lights were suddenly extinguished by a lineman who was repairing some wires in the vicinity. The surgeon in charge of the case, with rare presence of mind, immedi- ately called for pocket flashlights, of which eight were obtained. With these serving for illumination, the operation was successfully completed, and announce- ment made that the patient would un- doubtedly recover. MINIATURE PISTOL RANGE IS VENDING MACHINE Shooting pennies from a pistol, at tar- gets in which are holes for bull’s-eyes, is the principle of a vending machine manu- factured by a Wisconsin novelty company. A penny is inserted in the spring gun, careful aim taken, and with the pulling of the trigger, the penny is shot at the target. When a bull’s-eye is made, the “sharpshooter” is rewarded with a piece of candy, gum, etc., which is automatically released by the impact of the coin. Miniature Pistol Range, Showing the Holes Which are Used as Bull’s-Eyes at the Left, and the Pistol at the Right End

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924 HARVESTING DATES REQUIRES BOTH SKILL AND AGILITY As dates grow in large bunches at the tops of trees which reach a height of 40 to 60 ft., it is quite a feat to harvest them, This Arab Workman Makes Use of a Rope Loop around the Trunk of the Tree to Assist Him in Climb- ing after the Dates When They are to be Harvested but the Arab workman becomes very adept at the task. He passes a loop of rope around the tree trunk and works his way up by leaning back against the rope and climbing with his bare feet on the knobby surface of the trunk. The bunches of dates, often weighing as much as 15 bb., are cut off with a sharp knife and lowered to the ground on a rope. POPULAR MECHANICS NOW SUCCEED IN PRODUCING UNBREAKABLE GLASS According to recent reports, a Bohe- mian inventor, after 13 years of research, has succeeded in producing unbreakable glass. At a recent demonstration, it is said, plates and vessels of the material remained whole when thrown to the ground from a height of 12 ft. Meat was roasted on a thin glass plate over an open fire at a temperature of 750°F. Tin was melted in a glass pot, and nails were driven in a piece of hardwood, using a piece of glass fora hammer. A thin glass tumbler was heated in a stove to such a tempera- ture that wood placed in it was charred to ashes. The glass not only stood the heat, but even remained unbroken when plunged into cold water while still in an overheated condition. The carborundum stones used for cutting ordinary glass can- not be used on the unbreakable glass, as even a diamond sometimes fails to cut it, due to its extreme toughness, TWO-SPAN RAILWAY CROSSING OF RIVER IN WASHINGTON In connection with the power develop- ment of the Skagit River in Washington, as part of a 26-mile railroad, the river is crossed at Devil’s Elbow by a bridge with two deck spans formed of Howe trusses, one span being 100 ft. and the other 150 ft. The pier between them was built upon a large natural bowlder, that very much simplified its construction. The curved approaches are on trestle bents. The bridge has a headway clearance of 80 ft., and has already withstood the highest water experienced in 10 years. & mated Two-Span Railroad Bridge, at Devil’s Elbow, on the Skagit River in Washington, Showing, at Left, the Huge atural Bowlder That Supports the Pier between the Two Spans: Shown to the Right, re Ordinary Trestle Bents, and the Spans are The Approaches, One of Which is ormed of Howe Trusses

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aes POPULAR MECHANICS 925 MACHINE FOR CLEANING OBSTRUCTED OIL WELLS Oil wells in which the flow of oil has been obstructed by the accumulation of sand at the bottom of by bevel gearing in connection with a driving pulley on a suitable stand at the top of the well. This may be driven by a belt from the drilling outfit at about 90 revolutions per minute. the well, can be cleaned by a machine that has recently been developed. To the bottom of the tubing that is used for pumping the oil is screwed a _ cutting bit that is about 2% ft. long, and that is split in two longitudinally. Each half is pivoted at its upper end, so that when the tube is rotated, they swing outwardly, and as they cut away the sand, gradually assume a nearly horizontal position. When fully extended, they clean out the sand _ Left: Driving Mechanism at Top of Well for Rotating the Cutting Bit at to a diameter of about the Bottom, as Seen at Center. When Rotated, This Opens Out to a Nearly 5 ft. The tube is rotated Horizontal Position, as Seen at the Right, Cutting Sandy Obstructions Away to a Diameter of Five Feet OIL AND AIR-COOLED MOTORS DEVELOPED IN ENGLAND As the result of tests made during the war at the air-craft factory at Farn- borough, Eng., it was the large crankcase, for around the latter are air passages through which a blast is circulated by fan blades on the fly- wheel, mounted on the crankshaft in front of the engine. The protruding cylinder demonstrated that in air- cooled internal-combus- tion engines as much as 40 to 47 per cent of the cooling was, under cer- tain conditions, done by the crankcase, The result has been the design of a so-called oil-cooled en- gine, in which the crank- case has been greatly enlarged so as to almost completely envelop the cylinders. Single-cylin- der, double-opposed and V-shaped four-cylinder motors designed on this principle have been ap- plied to motorcycles and to automobiles with very V-Shaped Four-Cylinder Oil-Cooled Motor of English Design: The Side satisfactory results. They View, at Left, Shows the Intake Side with Enlarged Crankcase for Cool- . ith Oil. i have proved to be as ing with Oil. The End View, at the Right, Shows the Overhead Valves quiet-running and as dependable as the best water-cooled engines, being very slightly affected by variations in atmos- pheric conditions. These engines are not entirely dependent upon the cooling action of the lubricating oil contained in heads are provided with cooling fins that are also reached by this air blast. @At a recent automobile show a team of three men took down a truck motor in the remarkable time of 14 minutes

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£ —____ —— } \ Ornamental Arched Bridge between Two Buildings of the Case Technical High School at Detroit, Erected as a Memorial to the High-School Boys Who Saw Service in France: For Each High School of the City There Is a Bronze Tablet Inscribed with the Names of the School Veterans —cratdtianiaceiagndaeeniae Photo of a Booth at the Recent Wis- consin Markets Exhibit Held at Mil- waukee, Being a Representation of a Box Car Ornamented on the Outside with Potatoes Wayside Shrine on a Wisconsin State Trunk Highway in Por- tage County: Inside the Struc- ture Is a Statue of the Virgin Mary with the Infant Jesus in Her Arms partment of a Consolidated School at Good- rich, Michigan, Who Built This Bus, as Indicated by the Sign on It 926

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* Spring at the Hermitage, } Tennessee, Old Home of President Andrew Jack- son, Now Supplying | Water for the Confed- erate Soldiers’ Home Trolley Poles at Stop Corners in De- troit were Formerly Striped with White Paint. Aluminum Paint is | Now Used and is Found More Read- 1 ily Visible at Night Attractive Road Sign Erected in New Jersey and Located Six Miles from Cape May, on the New State Highway Leading from Atlantic City, New York, and Philadelphia: It Is 12 Feet High, 40 Feet Long, and is Illuminated at Night by Eight Powerful Lights; the Lighthouse Is More than a Pic- ture, for It Has Two Revolving Lights, One White and the Other Red o - = — = | ’ “- 7 — a ¥ Near the Town of Dundas, Ontario, Stands é , ; an Old Long-Abandoned Cemetery. It is Now , , being Converted into a Park, and the Tomb- stones are being Collected for Preservation * ———— OOOO | ~ Novel Kind of Four-in-Hand at a Bench Show Held Recently in Cincinnati: Pretty Girls and Pedigreed Dogs were Hauled up and down the Promenade, with Girls Riding the Rear Oxen | |

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928 POPULAR SPECIALLY BUILT MOTOR CAR EMPLOYED FOR SLEEPING Employing an automobile for sleeping purposes is possible with a machine now MECHANICS EXPERIMENTAL PURIFICATION OF CANNING WASTES Tests made by the U. S. Public Health Service have proved that the waste liquids of tomato-canning fac- baie tories, and by inference, of factories packing any vegetable or fruit, can be purified and may be dis- charged with impunity into relatively small bodies of water. The wastes treated, consisting of liquids used in wash- ing floors, utensils, and canning apparatus, from which about 85 per cent of the solid matter held in suspension had been removed, were pumped into settling tanks, and Specially Built Motor Car, Showing How It was Designed for Quick Con- version into a Sleeping Compartment When being Used for Touring Purposes found on the English market. The car, a small runabout or roadster model, has a removable seat and back. These are so arranged that the occupant lies in a com- fortable position, his head near the dash- board and feet extending to the rear of the vehicle, thus allowing him to obtain rest while touring. the citric acid of the to- matoes was largely con- verted into lactic acid. The separated solids were disposed of in shallow beds of sand and cinders. The liquid from the settling tanks was filtered first through a bed of coarse cinders and then through sand, after which it was found that fish could live in it for six weeks. There were no objectionable odors in connection with this work. NOVEL ATTEMPT TO UTILIZE ENERGY OF WAVES A new attempt to utilize the energy generated: by wave action is interesting because of its novelty. A track, 75 ft. long, set at an angle of about 30° with the ocean surface, has been Above: The Drum at the Head of the Track, with the Cable Passing around It from the Car. Atthe Right: The Car at the Upper End of the Track, Showing the Surface against Which the Waves Strike constructed at Ocean Seach, Calif. A weighted car runs on the track, but cannot leave it. The front of the car presents a broad surface at right angles to the track. A cable, attached to each end of the car, runs over a drum at the upper end of the track, and over a submerged pulley at the lower end. The waves striking the car, drive it up the track, and when the waves recede, the car returns by gravity. In this manner the car is given a reciprocating mo- tion, which, transmitted through the drum, can be used to drive a pump or other machinery.

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i ie Left: By Turning the Crank at the End of the Truck, a Worm Gear and Pinion Cause the Legs to Extend, Raising the Truck Body High Enough So It may be Used as a Workbench. Right: When Used as a Truck the Extension Legs are Lifted Clear of the Ground TWO-PURPOSE FACTORY TRUCK HAS FOUR LIFTING LEGS \ factory truck with a capacity up to 2.000 lb. has been devised along rather unusual lines. At each corner it is equipped with an extension leg, and by turning a handle, the truck body can be raised to form a workbench or to assist in transferring the load to an auto trucl or car. The lifting mechanism is self- locking at any point. SMOKE TAKES SPIRAL COURSE IN TWO-PIECE PIPE BOWL With the object of producing a dry, clean smoke, a new pipe has been devised which consists of an inner bowl screwed into an outer shell. The threads are so formed that the smoke follows a spiral The Smoke is Drawn Down into the Bottom Chamber and Then Up along the Spiral Thread to the Stem path in passing from the bowl to the stem. The bowl may be removed for cleaning. AIR-MOISTURE ELIMINATORS OF DEMOUNTABLE TYPE Eliminator plates, used for the elimina- tion of moisture in the process of wash- ing air, are now being manufactured so wind Eliminator Plates of Air-Washing Process Shown Placed in the Angle-Iron Frames, Which are S!i>ped into Brackets Riveted to Air-Washer C ing that they may be installed or taken down with a minimum expenditure ot labor. Angle-iron frames, provided with slots in which the plates are placed and rigidly held, are slipp d into a bracket that is riveted to th ide of the air-washer cas- ng. This method of construction sup- plies an eftective means for cleaning, yainting, o1 ing repairs, as the entire set of plates or al unit thereof, can be removed or replaced with ease and facil ity, thereby reducing the possibility of corrosion, and extending the life of the plates.

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SOME NOVEL AND LITTLE-KNOWN ACCESSORIES This Dish Scraper Has a Rub- ber Blade Which Easily and Quickly Scrapes Dishes and Utensils of Any Size and Shape, Thus Saving Water, Soap, and Towels An Air-Purifying and Deodorizing Attachment for Electric Fans Which Circulates an Agreeably Perfumed Germicide Fixture Switch That can be Attached to Any Canopy, Ceiling A Refrigerator Basket Which is Built Something like the Ordinary Vacuum Bottle So a Pan, Wall Bracket, or That It Retains Either a High o Other Electric Fixture or Low Temperature as De- in the Home sired, Making It an Ideal Basket to Use for Picnics This Dish Drainer Runs the Water off the Dishes Directly into the Sink. It is Elevated at one End, While the Other Hangs over the Edge of the Sink A Cuff Holder That Enables the Wearer to Adjust the Cuff on the Forearm or above the Elbow, Making It Possible to Wash the Hands or Per- form Other Work without Soiling the Cuffs — An Electric Washing Machine Which Has a Light Mounted on a Vertical Arm to Illuminate the Dark Places of the Laundry: The Lamp is So Wired That It Is Independent of the Motor $30 An yone wishing further information on devices described in the editorial pages can

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INTENDED FOR THE HOME AND ITS MEMBERS This Combination Can Opener and Bottle-Cap Lifter Has an Aluminum Nonrusting Han- dle and a Crucible-Steel Cut- ting Edge ro An Electric Washer Pump Which Empties Water from the Washing into the Sink or Tub at a Rate of Eight Gallons a Minute ” Se a (yo? (gee K( (25/ er - « A Vanity Pillow That Opens like a Bag and Contains a Mirror, Powder, Rouge, and Other Make-Up Necessities The Use of This Small Heater, Which Burns Al- cohol, Keeps a Room Com- fortable on Chilly Days A New Rotary Fruit and Vegetable Press That Saves Much Time in Crushing Fruit for Ices, or Vegetables for Soup % “/ This Sanitary Dish Washer will Automatically Soap, Wash, Rinse, and Sterilize the Dishes, Glasses, and Silverware rm Combination Knife and Tape Measure Which Has a Blade of Good Steel and an 18- Inch Tape Measure Bathroom Toilet Cabi- net with Storage Com- partments for All Necessary Toilet Arti- cles, a Dressing-Table Top, Bevel-Glass Mir- A Swing for the Baby, Which Folds Compactly ror Clean-Towel and Is Easily Carried Drawer, and a Ham- When Going on an Outing per for’ Soiled Linen htas : . r7 . > ,- Af 1. J oa . ri obtain it by addressing Bureau of Infor tion, P r Mecha s Magazine, Chicago. 931

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932 BANJO RESONATOR AMPLIFIES ITS VOLUME SNAPPILY A resonator, or sound amplifier, that can be attached to any banjo, greatly in- creases its volume and gives a sharp, snappy qual- ity to the tone. It con- sists of a pol- ished brass cover that fits on the back of the banjo flush with its outside rim. On the cross- bar of the in- strument, at its center, there is clamped a threaded tube, one end of which is soldered to the center of the brass cover. The resonator is made to fit 10, 11, or 12-in. instruments, and can be attached or removed instantly without injuring the instrument in any way. WATCH CARRIER FOR AUTOS IS HANDY ACCESSORY Autoists making long trips in a ma- chine that has no clock permanently in- stalled in it, can have the advan- tage of this con- venience by the use of a_ watch carrier. This ac- cessory consists of linen-covered steel wire, which is bent in such a manner as to securely hold a 16 or 18-size timepiece. Fastened to the dashboard, the watch is visible from any seat. OIL DEVELOPMENT PREDICTED FOR SOUTH AMERICA Predicting a great oil development in South America, Dr. David White, of the U. S. Geological Survey, has stated that that continent is richer in petroleum re- sources, 1m comparison with the area, than any other, with the possible excep- tion of North America. This expert also claims that 13,000,000,000 of the estimated 60,000,000,000 bbl. of the world’s total sup- ply, lies under the surface there, waiting for some one to place it on the market. POPULAR MECHANICS Geologists have evidence of high-grade petroleum deposits, and in numerous re- gions the conditions are such as to war- rant the belief that oil would be found by exploration and drilling. CLOTH COVERS ON RADIATORS KEEP ROOM WALLS CLEAN As a cover for steam radiators a very simple device has been found to protect the walls and ceiling of a room from being dis- figured by the dust that always rises with the heated air from any radi- ator. The cover is made of coarse cloth, prefer- ably of a dark-gray color, cut in one piece to fit exactly the top of the radiator, with two end and sidepieces, a few inches wide, all neatly sewn together. The cover is removed from the radiator several times a week, and is cleaned by shaking. NEW CALIPER HAS SCRIBER FOR MARKING CENTERS On an ordinary outside caliper there has been pivotally con- nected to its legs, and on its central axis, a short tubu- lar sleeve, in such a manner that however its legs are opened, the sleeve remains al- ways on this cen- tral line, Sliding through this sleeve, and ex- tending through the pivoted apex of the caliper, is a rod that at its other end has a hardened point like a scriber. A helical spring on this rod tends to hold the jaws of the caliper tight on any piece of work that it straddles, and a little pres- sure on top of the rod with the hand that is adjusting the caliper will cause the point on the other end of the rod to mark or scribe the exact center of the piece of work.

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~ POPULAR SELF-GOVERNMENT PRACTICED BY DEPARTMENT STORE One of the large department stores of Boston has successfully tried a form of self-government patterned much on the order of the U.S. government. Employes elect members of the House by ballot. Department executives form the Senate. Four high executives form the cabinet, and the president of the company is the chief executive. Under this plan, the em- ployes practically regulate their own working conditions, and the system has led to a valuable exchange of ideas, the founding of welfare organizations, and a substantial increase in the store’s business. PLIANT-METAL SPRING COVER FOR AUTOS AND TRUCKS To keep all dirt, sand, and moisture from automobile and truck springs, and to maintain them in a constant state of perfect lubrication, a metal cover is being manufactured that can be made to fit any spring, and can be enameled to match the color of the car. The cover is a continu- ous, flexible-metal sleeve, that yields to any deflection of the spring, and yet re- Three Sections of Flexible-Metal Spring Cover, Shown Assembled Above and Disassembled Below: When Completed, Similar Sections Extend the Whole Length of the Spring mains at all times grease-tight. It is filled with graphite grease, which is forced in through a fitting provided for that pur- pose, and which gets between the leaves of the spring. PORTABLE BENCH SAW CUTS MITERS AT ANY ANGLE In a new portable bench saw, a motor and a circular saw are mounted on a frame that swivels in either direction, per- mitting both right-angled and oblique cuts to be made. The machine is pro- vided with a revolving table that is gradu- ated on its outer edge. This table fits MECHANICS 933 into, and revolves in, a circular base, on the side of which is a locking device. Above the table is a bar used as a gauge for holding the work, so that after the Portable Bench Saw for Cutting Miters on Any Kind of Wooden Fittings: The Handle in Front of the Base Is for Locking the Table at Any Required Angle table is revolved and locked at the desired angle, any bevel or miter can be cut quickly and accurately. On the housing of the saw is a control handle, and near it a simple switch, so that a finger of the same hand that depresses the saw into the work, starts and stops the motor with the switch. IMPROVED DEHORNER REMOVES BOTH HORNS AT ONCE For dehorning cows or calves, an in- strument that, it is claimed, will remove both horns in 30 seconds, is certainly an improvement over old methods of sawing still in common practice. The dehorner comprises stationary and pivoted cutting blades which engage the horns, and by the operation of a crank handle these cutting blades are moved so that the horns are cut from the animal. There are two pairs of cutting blades, which are adjustable laterally to fit any pair of horns, both of which are thus removed simultaneously. Two Views of Dehorner That Removes Both Horns at Once from an Animal

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934 STEEL KITCHENS PROVE AID IN CONSERVING SPACE Conservation of space is ai important problem in the construction of the mod- ern apartment building, and a kitchen POPULAR MECHANICS ALCOHOL AS A BY-PRODUCT OF A MEXICAN PLANT In Mexico, a plant known as the maguey, which is a species of the agave, or American aloe, has for a long time been utilized for the manufacture of sisal hemp. Up to the present the sap contained in the plant has been wasted, but it is now con- templated to utilize this also for the production of industrial alco- hol. The plant grows very ex- tensively in many parts of Mex- ico, and it is calculated that without any further cultivation, there could now be produced an- nually many million gallons of alcohol. The promoters of the enterprise in Mexico base their estimate of the value of the in- dustry to Mexico on the fact that the alcohol would be a valuable fuel for internal-combustion en- gines, especially of the gasoline type, which fuel it could easily replace at a very great reduction in price. The intention is to Steel Kitchen with Refrigerator and Shelves at the Left, Three- urner Gas Range in the Center, and Sink at the Right consisting of two steel cabinets, 18 in. deep, 30 in. wide, and 82 in. high, has greatly aided in this effort. One cabinet contains a three-burner gas range having a broiler burner in a large oven, and the other houses a refrigerator of 50-lb. ice capacity and possesses Spacious food compartments. Numerous drawers for cutlery, pans, etc., and shelves for dishes are provided, in addition to a standard 18 by 24-in. sink with special drain shelves, which is mounted beside the cabinets. When not in use, the kitchen can be shut off from the remainder of the living quar- ters by large wooden doors which match the interior trimming of the room. EXCAVATIONS WILL BE MADE AT RUINS OF COLOPHON A particularly promising site for exca- vations is that of the ancient city of Colophon, in Asia Minor, that flourished about 800 B. C. Permission has been granted by the Greek government to the American. school of classical study at Athens to make excavations there, and under the permit the school will do this work in collaboration with the Fogg Museum of Fine Arts of Harvard Uni- versity. Colophon was one of the twelve cities of ancient Ionia. utilize the fiber of the plant for making sisal hemp, leaving a resi- due suitable for making paper, and thus the alcohol would be entirely a by-product of inexhaustible quantities that could be sold at a very low price. UPPER HALF OF WINDSHIELD WIPED BY NEW CLEANER Realizing that the usual type of wind- shield cleaner gives the automobile driver a very limited range of vision, a new cleaner has been devised which wipes the entire upper half of the windshield glass. The wiper arm is attached to a piston in a tube which extends across the full width of the top. This tube is connected This Wiper Cleans the Entire Upper Half of the Wind- shield and is Actuated by the Suction in the Intake Manifold of the Engine

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POPULAR MECHANICS 935 to the intake manifold of the engine, and the vacuum at this point causes the pis- ton to move in the tube. An ingenious system of valves causes the suction to be applied to the other side of the piston when it reaches the end of its stroke. COMBINED SOLDERING IRON AND BLOWTORCH A combination gasoline blowtorch and self-heating soldering iron which can be used as the latter when combined, or as the former when the soldering point is removed from it, is now on the market. The part of the device that forms the han- dle, when used as a soldering iron, is a barrel 1% in. in diameter, and about 10 in. long, in which is the air pump and the gasoline container, and at the end of this is the blowtorch nozzle, with a removable soldering point, against which all thé Combination iia’ and Self-Heating Solder- ing Iron, with Its Heat- ing Stand Here Shown in Folded Position: With | the Soldering Point Re- moved, It Is a Blowtorch flame in the torch is directed. cotton wick assures the flow of gasoline regardless of the position in which the A heavy torch is held. A folding heating stand is supplied with the torch. “NO MAN’S LAND” AT RHEIMS CONTAINS 600 HOUSES “No man’s land” in the outskirts of Rheims, France, has had 600 houses con- structed on it during the last year, in which 4,000 persons will live. The new buildings are erected between the forts of Nogent-l’Abesse and Berru, and are equipped with every modern improve- ment, including nurseries for infants and playgrounds for children. @ It is announced that the recently com- pleted government railroad from Seward to Fairbanks, Alaska, has been officially named “The Alaska Railroad.” CONVENIENT DESK MEMO PAD KEEPS PAPER CLEAN One of the latest devices in office equip- ment is a memorandum pad for che desk which is so built that the paper, while This Convenient Desk Accessory Contains a Roll of Memorandum Paper Which is Protected from Dirt but Always Ready for Use readily available, is always kept clean. A roll of paper is carried in the holder, and a slight pressure on the top of the case enables the user to grasp the end of the strip, which can be drawn out and detached with one hand. ARTIFICIAL “NOSE” PLACED IN NECK OF HORSE Deprived of natural breathing facilitics through an accident several years ago, a horse in Cin- cinnati, Ohio, has been pro- vided with an artificial “nose.” The apparatus consists of a silver tube, which is in- serted in the neck of the animal, con- necting with the windpipe. A fine-meshed screen in the tube prevents the entrance of any foreign matter that might shut off the air supply, and the horse has been driven as usual since the operation, with no apparent ill effects, although its daily appearance on the city streets never fails to arouse interested comment

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CHILDREN’S PICTURE-STORY DEPARTMENT ( sent. Entertaining and Instructive, \ the Most Popular Scientific Instru- ment of the Day Is the Radiophone, the Interest in Which is Spreading So Rapidly That It Looks as If before Long No Well-Furnished Home will be Thought Complete without One. In Many Schools There Are Now Reg- ular Classes in Radio Instruction Such as the One Shown Above, Which Is at the Lane Technical High School, in Chicago. The Instructor Has No Difficulty in Holding the Attention of the Students —!_ — Snow in Southern California Transported from the Mountain Tops and Dumped onto a Green Lawn for the Kiddies to Enjoy Snowballing. Right: A Rabbit up a Tree, Although Rabbits cannot Climb. The Little Hill behind the Tree Was So Close to It That Bunnie could Hop Easily from One to the Other Village of Plymouth Modeled by Sixth-Grade Pupils: Houses are Made of Twigs, with Strips of Bark for Roofs, All in a Trayful of Sand

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OF MODERN ACTIVITIES AND INTERESTS A Real Live Alice in Wonderland, For It Is Alice Hastings being Carried by Natives through the Wilds of the Bel- gian Congo: She Was the Youngest Member—Only Six Years Old—of a Party of Americans Who were There Hunting ae. Gorillas A Brood of Ducklings Who Lost Their Real Mother, and Now Have as Foster- mother a Hen Whose Only Trouble Is How to Take Care of Her Brood without | Getting Wet Slingshot Made of Pol- ished Aluminum—Very Light and Smooth, Therefore Easier to Handle Than the Old b Ones of This Type An Overland Canoe Makes the Kiddie Driver Independent of the Water and Free from Its Dangers. It Is Self-Pro- pelling, and will Carry 200 Pounds ’ Story of the Landing of the Pil- grims at Plymouth Modeled ‘in Sand by Fifth-Grade Pupils of the Cutler School of Somerville, Massachusetts

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BEARING BUSHINGS RENEWED WITHOUT DISPLACEMENT In order to eliminate the necessity of replacing the bushing when a bearing becomes loose from wear, a swedging tool has been devised that will reduce the bore of a bush- ing as the result of a few strokes from a hammer. The tool consists of two parts, each of which has an end small enough to fit inside the bushing, with a shoulder that fits over the end of the bushing, and inside the hole in which the bushing is set. One of these partsis short, and rests on any support below the bushing under treatment, and the other part is long, and is above the bushing. Blows from a ham- mer on its upper end shorten the bush- ing slightly, and cause it to swell, thus reducing the bore as much as required.

STORAGE HOUSE FOR APPLES HAS GOOD VENTILATION Apples or other perishable commodities can be kept for a long period of time without danger of decay, in a storage house which was especially designed for the apple industry of the Northwest. The POPULAR MECHANICS walls, floor, and ceiling of the building are insulated with sawdust, mill shavings, commercial cork, or mineral wool. The doors are also insulated, while the win- dows have two thicknesses of glass, and have insulated shutters. Every 10 ft. along the bottom of the sides and ends, are 18 by 24-in. openings, or vents, and inside the structure is a false floor with the boards laid 11% in. apart and built just above the openings around the base. Top- ping the whole is a cupola in which are numerous vents, and which has a damper placed where it joins the ceiling. At night, in warm weather, all the vents are opened, and the warm air inside the house escapes through the cupola, thus pro- viding free circulation of cool air, which aids in preserving the fruit. ARMREST EASILY ATTACHED ON DOOR OF SMALL CAR Automobile owners now may avail them- selves of an armrest which can easily be attached to the door of the machine, thus adding comfort to the trip. The ap- pliance has two U-shaped brackets that fit over the door top near the wheel, and the rest is padded and may be covered to match the interior of the car.

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Ani Intormation as to wnere to obtain any specified ey materials or parts for making objects described in the following pages may be had. on from our Bureau of Information.—Editor. request, Supply of Gas Automatically Controlled By CURTIS RALSTON HE gas controller shown is a device which, owing to its cheapness and simplicity, may be used for many purposes where it is necessary to regulate the flow of natural or artificial gas used for heating. The controller, or regulator, working in connection with an ordinary expansion thermostat, opens the gas valve whenever the temperature falls to a predeter- mined point, and when the tempera- ture has risen to THERMOSTAT M BATTERY valve-opening coil to work as soon as its thermostatic contact closes. The whole operation takes place at a single “click” and occupies but the fraction of a second, and the amount of energy taken from the battery is so small that a single pair of cells will last for a long time. The electro- magnets are of the “shell” type, each being covered by two iron pipe caps, which are con- nected by a nipple. The coils are the desired maxi- mum the automatically closed, except for a sufficient flow of gas to supply a “pilot” light. Since the power for open- ing and closing the valve is supplied by Py : one or two dry /. cells, it is of great importance to cut off the flow of elec- tric current as soon ARM —_ CONTACT SEGMENTS 1 MaFIBER BLOCK ~ valve 1s ROCKING CONTACT SPRING SCREW TO REGULATE wound around a hollow core of iron pipe which diameter sufficient to accommodate the solid movable cores. A _ hole is drilled through the center of the upper pipe caps to permit has a insertion of the cores. Bell wire is used for the coil CONNECTIONS windings, and the PILOT LIGHT greater the number as the work is done and thus prevent waste of power; how this is done is clearly shown. The thermostat may be made at home, if desired, of turns the greater will be the “pull” exerted on the cores; also, more current will be re- quired to operate the device. The magnetic circuit is but the purchased article will gener- ally be found more satisfactory. When the thermostat gets warm, its expand- ing member curves downward, closing a circuit through the electromagnetic sole- magnets to the Levers. noid at the right, which then pulls down into it the iron rod forming the core, thus closing the gas valve. As the valve completes its rotation, it breaks the circuit through the closing coil and closes another circuit through the open- ing coil at the left, thus preparing the Above: Constructional Features and System of Wiring for Connecting the Thermostat, Battery, and Electro- Below: Regulator, Giving Front and Rear Views of the Device thus mostly all iron, which produces a very powerful type of magnet. When the controller is set up, the first adjust- ment to make is for the flow of gas for the pilot burner, and this is done by a Photographs of the screw in the bottom of the valve-closing magnet. The two _ thin-brass_ contact springs, which make contact with the segments on the fiber or hard-rubber valve disk, should then be adjusted to give a positive break, late enough so that rotation of the valve is complete.

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940 POPULAR Certain Features of Tree Surgery Patented While it is no infringement of an in- ventor’s right for a publisher to tell how a patented article is made, it is, of course, an infringement for any one actually to make the article for the use of himself, or others, without permit from the owner of the patent. For that reason this maga- zine never publishes in this department a description of how to make anything it knows to be patented. On page 283 of the February, 1922, issue, we published an article entitled, “How to Save De- MECHANICS cayed Trees,” being a description of how to perform divers operations of tree surgery. It now appears that patent No. 890,868, issued in 1908, and patent No. 958,478, issued in 1910, and now owned by the Davey Tree Expert Company, of Kent, Ohio, cover particularly the filling of a cavity in a tree with concrete in sec- tions, and the provision of a water chan- nel at the edge of the cavity, as described in our article. Our readers are hereby cautioned not to use the above features of the described process without having first secured consent or license from the Davey Tree Expert Company, Kent, Ohio. Sharpening the Lawn Mower The photograph illustrates a method by which lawn mowers are easily sharpened in a few minutes. The apparatus required By Revolving the Cutter Reel of a Dull Lawn Mower in a Direction Opposite to That in Which It Runs When Mowing the Lawn, and Feeding an Abrasive Compound onto the Blades, They are Rapidly Given a Keen Cutting Edge includes an electric motor; a_ large wooden pulley to fit the end of the cutter shaft; two clamps, a belt, and some oil and emery powder. The mower is clamped rigidly by the crossbar, the wheels and pinions are re- moved, and the wooden pulley is fitted to the end of the shaft. The proper speed for the mower shaft to turn is about 300 rp.m., and with the motor running at about 1,750 or 2,000 revolutions, the wooden pulley should be about six times the diameter of the motor pulley. The mower shaft must turn in the opposite direction to that in which it revolves when cutting grass. After the motor is started, a little oil and emery is fed onto the cutter edges and the horizontal knife at the bottom of the mower as well; they are then allowed to grind each other to a sharp edge by running the motor from 5 to 20 minutes. Ordinarily, the motor will have to be stopped at intervals and the knife set a trifle closer to the cutters by means of the adjusting screws. The ad- justment must not be made too tight or the motor may be overworked, and be- sides, the emery cuts better when the adjustment is little, if any, tighter than is proper for operating the mower. Scale Attachment for Setting Calipers Much work is spoiled as a result of wrongly or inaccurately set calipers. The usual method of setting inside calipers, by holding the end of the scale against a flat surface, is very deceptive, because if the scale is not exactly at right angles to the end surface, the calipers will be a little over or under the required dimension. Furthermore, as all ordinary calipers have rounded points it is ro easy matter to see when the setting is correct. The drawing shows a simple little at- tachment that makes the setting of calipers easy and accurate. It is made inthree parts, consisting of a sta- tionary endpiece into which a piece of '%-in. steel wire — = : HEAVY WIRE is tightly driven, onset anda sliding block. NP 5 so AO The wire is bent over at its outer end, and a “V” is filed so that the scale makes a snug sliding fit in the attachment, the opposite end of the scale resting against the endpiece. When using, the sliding block is moved to the required dimension as indicated by the scale, where it is held by the thumb until the calipers are set. When setting out- BLOCK side calipers, the legs are, of course, set against the outside of the endpiece and sliding block, the latter being located on the scale accordingly.

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POPULAR MECHANICS 941 Preventing “Sweating” of Concrete Much trouble is caused by the “sweat- ing” of concrete walls on the inside; this is usually caused by faulty construction, as concrete walls, like masonry, should be built with a dead-air space between the wall and the interior plaster. Many types of concrete walls provide for hollow spaces within the walls, but, in addition to this, the interior plaster should be furred out so as to leave a continuous dead-air space between it and the con- crete. In the case of barns, as cattle give off a large amount of moisture, some ade- quate system of ventilation is also very desirable. An Improved Bell Center Almost every mechanic is familiar with the usual type of bell center used in machine shops for mark- ing the centers on rough round stock; this cannot be satisfactorily used on square stock. The bell center illustrated, how- ever, can be used on either square or round stock with equal facility and satisfaction. As will be observed from the drawing, this center has four equally spaced arms radi- ating from the body at an angle of 30°. When in use, these arms rest upon the ‘STOCK edges of the square-stock face, insuring a more accurately located center than can be obtained by the use of the ordinary type, as this would rest on the corners, which generally have a heavy burr on them that throws the center off.—Chas. Homewood, Ontario, California. CENTER PUNCH A Saw-Filing Kink When filing a saw, swab the teeth with a solution of copper sulphate (bluestone or blue vitriol) and water. This will de- posit a thin coating of copper on the metal, and when the first set of teeth are filed, the unfiled teeth will show up very distinctly. This idea will be found a great help, especially where the light is poor.— F. L. Schneider, Palmer, Mass. Handy Container for Soft Soap A useful and economical method of holding soft soap, prepared hand cleaner, or left-over pieces of soap in the shop or COMPRESSION GREASE CUP » / | Ye TEE Soft Soap, Hand-Cleaning Compounds, and Fragments of Soap Contained in a Large-Sized Grease Cup are Economically Kept and Used in the Shop or Garage garage, is to place the soap or cleaner in a large-sized compression grease cup. The grease cup is screwed into a tee, and is fastened to the wall or woodwork by means of a short length of pipe and a pipe flange in the manner shown. The outer end of the horizontal pipe is plugged to prevent the soap from running into it. In use, one hand is held underneath the tee while the other is used to screw down the cap, which forces the soap out through the bottom.—Herbert A. Strickler, Buf- falo, N. Y. Skid for Use on Steps In a large public building, where pianos and other héavy furniture are frequently moved overa short flight of steps, the plank skid shown in the drawing has y proved very use- Li Ey. ful. Triangular a ee blocks, attached to ZS the underside of > “4 the plank, rest upon the stair treads, the num- ber of blocks de- pending upon the length of the skid; one for every other step will generally be found sufficient. The undersides of the blocks are covered with rubber or felt to prevent scratching the steps. When \\ RUBBER) | WOODEN BLOCKS not in use, the skid can. be pushed to one side, where it will not interfere with the use of the stairs.

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942 POPULAR Automatic Belt Shifter for Grinder Practically every shop experiences trouble because the workmen forget to stop the grinding wheel after they have * PULLEY SHIFTER PULLEY, 4 TIGHT LOOSE PULLEY PULLEY COUNTER- WEIGHT ro PLATFORM “7 When the Workman Steps on the Platform, the Belt is Shifted from the Loose Pulley and the Grinding Wheel Started. When the Man’s Weight is Removed, a Counterweight Pulls the Belt Back onto the Loose Pulley, Stopping the Machine used it. In order to make certain that this would not occur in a small machine shop, the arrangement illustrated was in- stalled, and worked with success. A platform, surrounding three sides of the machine, is elevated at the end near- est the machine, and connected to one end of the shifter rod so that, as soon as ihe workman steps on the platform, the belt is shifted over onto the tight pulley and the wheel begins to revolve. When the weight of the man is removed from the platform, a counterweight attached to the opposite end of the shifter rod pulls the belt back over to the loose pulley, stopping the machine. This arrangement not only saves a lot of the men’s time, but prevents accidents and saves power, as the grinder is running only when in use.— Ethan Viall, Barboursville, Ky. Hacksaw as Facing for Core Boxes The cores from a half-core box were quite satisfactory while the box was new, hut as the face of the core box was un- protected, the constant rubbing of the strickle, or strike board, soon wore down the face of the box so that the two half cores, when pasted together, formed an oval, instead of a round core. The core box was repaired and faced with tin, but this was soon cut through. It was then suggested that worn-out hacksaw blades be nailed to the edges of the box. The suggestion was acted upon, and since then there has been little or no wear on the core box as the hardened saw blades provide protection for the wooden edges.—M. E. Duggan, Kenosha, Wis. : MECHANICS Locating Cylinder-Head Gaskets The difficulty experienced when the cylinder-head gasket shifts while the head is being placed in position on an auto- mobile engine, can be avoided by the use of two simple locating studs. These con- sist of two cylinder-head bolts with the heads sawed off and slots sawed across their upper ends to facilitate removal with a screwdriver. The studs are inserted in diagonally opposite holes in the cylinder block, the gasket is placed over them, and the head put in position; when the bolts are inserted, they will coincide with the corresponding holes in the gasket, the studs, of course, being unscrewed when the head is in place. Knurl Holder Fits Toolholder A quantity of small brass thumbscrews were to have their heads knurled while the stems were held in a universal chuck. It was necessary to chuck the screws with the heads close to the chuck jaws, to prevent bending, and a regular toolpost knurling tool was found to strike against the jaws, besides being too heavy for the work. A hand-rest knurling tool, on the other hand, was not altogether satisfac- tory, and the difficulty was finally over- come by mounting the . small knurl [4 taken from -*& the hand- ; > holder in a Do specially made bracket, fit- ting into the 54 square BRASS SCREW HEAD BEING KNURLED ® %46-in. hole in an off- set toolholder. The bracket can be removed for use in a straight holder aiso, or in one offset in the oppo- site direction. While only one knurling wheel was used, the result on the small brass-screw heads was entirely satisfac- tory. The bracket was made of tool steel, for toughness, and the arms through which the knurl shaft passed were as thin as possible, consistent with strength, in order to allow the knurl to be used close to the chuck jaws. The square stem was offset to allow further clearance for the toolholder shank; by reversing the bracket, this offset can be made to come on the other side for use on work located close to the tailstock.

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POPULAR Cutting Springs after Winding When making a heavy wire spring in the machine shop, it is generally coiled on a mandrel held between the centers of a lathe. After the spring has been wound to the desired length, it is a good plan to turn the lathe spindle backward a few turns before cutting off the wire. This relieves the strain on the spring, and makes it safe to cut the wire with a hacksaw or pliers without danger of hav- ing the end of the wire fly back. Quickly Operated Jig Clamp A quickly operated jig clamp is shown in the drawing. The clamp is made with four lugs, one at each cor- ner, with the swinging leaf pivoted be- tween two of them, the ac- tual clamping being done by means of the cam-and-pin arrangement shown in the sectional dia- gram. In or- der to be sure of accuracy, the work is held by a floating foot, or center. A pin, driven through a hole i the top of the center shank, prevents it from falling out, and the center is ball- shaped so that it can adapt itself to the z | ] ts JIG BODY ot ail PIN CAM surface irregularities of the work.—J. Moore, Toronto, Can. Center-Punch Attachment for Square The attachment illustrated wifl be found a timesaver when laying out work. By setting the index mark on the attachment to a graduation on the square blade, any desired distance from the edge of the work can be prick-punched instantly; for greater rarer sone a pair of calipers, or an inside micrometer, can be used in setting. The base of the device, which is made of tool steel, is machined with a shoulder that fits against one edge of the square blade; a slotted extension opposite this shoulder carries a cam or eccentric that locks the attachment in place. The slot, and the construction of the cam stud, en- able the attachment to be used on blades of varying widths. The punch is carried in a sleeve, forced into a hole in the MECHANICS 943 shouldered end of the base; the punch point, an index mark is cut on the base, and the edge of the slotted extension is milled or ground exactly in in line with ECCENTRIC yo as DETAIL OF CENTER: PUNCH ATTACHMENT A Center-Punch Attachment for the Combination Square That will be Found Very Useful on the Laying-Out Bench line with the punch point also. A flaf filed on one side of the punch, and a small setscrew in the sleeve, prevent the punch from dropping out. Guard Plate for Knife Switch An unprotected knife switch is a real menace to the lives of those who work around it, especially if the switch is car- rying a heavy cur- rent. If it is not possible to use the safety switches that are now ac- cepted as stand- ard, the exposed knife switch can be made practi- cally safe by ap- plying an insulat- ing cover that will prevent accidental contact with the switch. The drawing shows a method in use at one plant. Here a piece of sheet fiber, or other insulating material, is attached to the switch by metal brackets. The insulating material completely covers the switch blades so that in opening or closing the switch, the operator cannot come into contact with anything but the handle—Clementine KNIFE ~ V, ' et INSULATING COVER Paddleford, New York City.

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SOME UNUSUAL JOBS FOR THE TRACTOR By GEO. G. McVICKER ANY farmers seem to be laboring under the impression that a tractor is only useful for drawing plows and other implements, and, when fitted with a power pulley, for driving a thresher or a circular saw. There ares many other jobs around the farm, however, for which the tractor could be used with a conse- quent saving in time and labor. A few such jobs are here described. The foundations of many barns and other farm buildings extend but a few feet below the surface of the ground, and very often the foundation walls will settle away from the building, due sometimes to undermining by rats, sometimes to heaving of the ground by frost. When this happens, only a small portion of the @vall supports the building. I found this to be the case with one of my barns after the frost had loosened the ground. Rather than employ a mason to relay the wall, section by section, I decided to try using the tractor to push it back into place. This was accomplished as shown in Fig. 1. A 3 by 12-in, plank, as long as the wall, was placed with its broad face against the latter. I then attached a 4 by 6-in. timber to the drawbar of the tractor by means of a chain, allowing the timber to extend forward between the wheels and protrude several feet ahead of the tractor. I toenailed this timber to the 12-in. plank, started the tractor, and, allowing the clutch to slip slightly, moved slowly forward in low gear. The foun- dation was thus pushed into position and held firmly until I had tamped earth sol- idly underneath it. I did this job alone in a little over an hour; with jacks or crowbars it would have taken several men much longer. It might be necessary, in some cases, to relieve the foundation of the weight of the building side, but this could easily be done by using levers. A jack is a tool seldom found on the farm, and when a small building is to be lifted, either for repairs to the foundation, or for making the foundation higher, or for plating rollers and skids under it, pre- paratory to moving it to a new location, crowbars are the tools commonly used. This method requires two or three men, 944 and makes a tiresome and time-consum- ing job. The building can be lifted, one side at a time, by using the tractor; this demands but little preparation and no materials that cannot be found on the average farm. The first step is to spike or bolt a 2 by 6 or a 2 by 8-in. timber to one side of the building, at a suitable height above the ground. The tractor is backed to within about 6 ft. of the build- ing, and a 4 by 6-in. timber is cut to such a length that it will reach from a point on the tractor frame just above the drive axle to the timber attached to the building wall. When this timber has been set so that it will stand a good push without slipping, the clutch of the tractor is slowly engaged, and the tractor, in reverse gear, moves back until it is against the building, as shown in Fig. 2. This action provides a powerful lifting effect, and raises the building as steadily and easily as a number of jacks. When the building is lifted, the tractor will hold it until blocking or skids can be placed in position, and then, by driving the tractor slowly forward, the building is allowed to settle on the blocks. The opposite side is lifted in the same manner, and if the building must be raised still higher, the operation is repeated, moving the timbers on the building lower, or us- ing a longer lifting timber. This is a safe and practical method, and the work can, if necessary, be done by one man. Removmg rocks from a field to be seeded appears to be an ever-waiting job for the farmer in localities where the ground is very stony, and many are in- clined to farm around the larger ones because of the work involved in moving them. With the aid of the tractor, how ever, rocks too large to be otherwise moved, without first breaking them, are easily loaded on a sled, hauled to the rock pile or stone fence, and unloaded, without any hand lifting at all being necessary. The sled used is no different from any common stone sled, except that a steel pulley is attached to the front end, as shown in Fig. 3. The only other piece of equipment necessary is a length of “6 or 1%-in. steel cable, one end of which is fas-

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pane Ow 7 _ eZ Merge Wy) Fia.4 JACK POLE —__ —~s = 6 OR 6 FT. /, Fig. 1 Shows the Tractor Replacing a Foundation Wall; Fig. 2, Lifting a Building for Foundation Work, or Preparatory to Moving; Fig. 3, ding, Hauling, and Dumping Heavy Rocks; Fig. 4, Removing a Heavy Wagon Box by the Aid of a Simple Device, and Fig. 5, Loading Felled Trees with a Minimum of Exertion 945 OUR

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946 POPULAR MECHANICS tened permanently to the front end of the sled, while the other is provided with a hook that will go into the eye of the tractor drawbar. A hole is poked underneath the stone with a long curved bar, and the cable worked through it. The end is then passed under the pulley, and hooked to the drawbar. As the tractor is driven ahead, the cable rolls the stone up onto the sled, the backward pull on the sled holding it in place until the cable rolls the stone forward against the pulley. The sled will then start to move forward, and without having to stop, the journey can be continued to the rock pile. When this has been reached, the cable is unhooked, run over the top of the pulley, and hooked to the drawbar again. The tractor is then started, the cable rolls the rock from the sled, and then pulls the sled on over the rock, without stopping the tractor, as it is driven back. I can, if necessary, lift a wagon box on or off the running gear by the exercise of “brute force and ignorance,” but I don’t like to do it, and I won't, so long as my tractor is at hand. I have a device rigged up, by the use of which so little time and manual exertion are required that it is a pleasure to watch it work. I set one 4 by 6-in. post, 10 ft. long, 214 ft. in the ground. At the top of this post, I pivoted a crossarm made of 2 by 8-in. timber, 9 ft. long, the pivot being a %4-in. bolt, and the pivot hole bored 18 in. from one end. The bolt passes through the upright post on one side, the other end being held by a piece of flat iron, bent and attached to the post as shown in Fig. 4. To the short end of the 2 by 8-in. piece I bolted a 7-ft. length of 2 by 6-in. lumber, bracing the two as shown, with two pieces of flat iron. It will be seen that, when the wagon is on the gear and the crossarm is just at the top of the box, the upright arm is stand- ing at an angle to the main post. Two loops of rope are placed around the box and over the crossarm, and the tractor is then backed against the upright lever arm. This raises the box clear of the running gear, which is then drawn from beneath, the cross supports shown in the illustration are placed in the brackets, and the box is lowered. One man does the whole job. Loading the trees felled for the winter’s fuel, or for a lumber supply, before haul- ing them to the saw, is easily a two-man job as ordinarily undertaken, and involves some heavy lifting. By using the method shown in Fig. 5, one man can do the work if necessary, and all manual lifting is eliminated. The necessary implements are a rope, % or 34 in. in diameter, 50 ft. long, a piece of the same rope about 10 ft. long, a chain long enough to reach around the largest of the logs, and a jack pole, as illustrated, 10 ft. long. Drive alongside the log to be lifted, about 3 ft. to one side. Wrap one end of the long rope around one of the mud lugs near the top of the tractor drive- wheel, at the rear, and, at a point on the rope near the center of the log to be lifted, take a half hitch around one of'the forks on the jack pole. The jack pole is set in a shallow hole, to prevent slip- ping, at the outside of the log, and in- clined at an angle of 45°. The other end of the long rope is fastened to a stump, or a stake driven in the ground, about 6 or 8 ft. ahead of, and to the outside of, the jack pole, as shown. The log is at- tached to the jack pole with the short rope and chain; then, with one hand hold- ing the end of the rope that is hitched around the mud log, slowly engage the clutch. As the tractor moves forward the rope will be wound on the drivewheel (the tractor should be steered so that it will), and the log is lifted. As soon as this happens, the jack pole begins to swing in, as the part of the rope between the pole and tractor is always taut, while that between pole and stump begins to slacken as soon as the log is lifted. As the forward movement continues, the jack pole is pulled in farther until the log is dropped in the center of the wagon. The placing of the jack pole, wagon, and stake demands a little bit of judg- ment, but after a few trials, the correct relative distances can be estimated with considerable accuracy, and the work will proceed with dispatch. Several other unusual chores for the tractor have come to my attention, such as using it as a snowplow, by attaching a V-shaped frame covered with boards to the front axle, and for heavy hoisting, by attaching the end of the falls of a block and tackle to the drawbar, then driving the tractor forward; these are but a few of the many that will occur to the wide- awake reader. Prolonging the Life of Emery Belts The life of emery belts can be con- siderably extended by treating them with paraffin wax. The wax is applied to the surface of the moving belt, or may be put on when the belt is idle. After ap- plying the wax, it will be observed that XE

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POPULAR MECHANICS only the cutting edges of the abrasive grains are visible, the voids between the grit particles being filled with wax. This is the secret of the extra-long wear. As any chips or metal dust cut from the work are forced into the wax, the emery is free to cut instead of clogging and breaking off. This method is especially useful in brass and aluminum work, as this material has a tendency to fill in more than harder metals. However, when the belt has finally filled up and become smooth, it may be made to.look like new by using a file card to clean out the ac- cumulated cuttings, after which another coating of wax is applied.—S. S. Suther- land, Detroit, Mich. Increasing the Oilcan’s Reach By the simple expedient of making a small collar, having a tapered hole, to fit over the spout of an oilcan, and attaching a suitable length of stiff wire to the collar, the range of the oil- can may be con- siderably in- creased. The wire, preferably of copper, is sol- dered into a hole in the collar. In use, the collar, with its attached { wire, is slipped — . over the spout of the oilcan; the oil fol- lows the wire and makes it possible to direct the lubricant into otherwise inac cessible places. The attachment can be put on or taken off the spout in a second. Jf HOLE FOR WIRE Driving Screw Hooks Quickly The manual-training class of a high school, in carrying out a project that re- quired a gross of screw hooks to be in- serted into boards, found the job very tedi ous, until the tool shown in the —— drawing was made. It was made froma stove bolt having a shank | that would fit into the chuck ofa spiral screwdriver, a flat being filed on the end of the shank to correspond with that on the screwdriver bits. The slot in the bolt head fits over the screw hooks, and inserting them then became a very simple matter—N. E. Studebaker, Houston, Tex. 947 A Carriage-Bolt Holder Carriage builders, automobile - body workers, and others who have frequent occasions to remove carriage bolts, are familiar with the tendency of the bolt to turn with the nut. As the head of the bolt is round, it is not al- ways an easy mat- ter to get a grip on it that will hold without dam- age to the adja- cent woodwork. \ The simple tool \\ illustrated has been used for a number of years by a man of long experience in work of this character; it should be made of the best tool steel and tempered as hard as a screw-plate die. The teeth are beveled, and the bevel must be on the upper side.— C. S. Simmons, Cache, Okla. (HEAD OF BOLT —_\—_— ‘ BEVELED TEETH Holding Nonmagnetic Materials on Magnetic Chuck In surface grinding brass, or other non- magnetic parts, considerable trouble is experienced if the grinding machine is equipped with a magnetic chuck. In or- der to do the § work, either the vise or special planer clamps must be used, that is, if the work is flat, as in ~ the drawing. | oa Such flat work, how- ever, having plane surfaces, can be held on the mag- netic chuck by using two steel plates of the kind illustrated, one on each side of the work, with a support behind them. The plates should be of such a width that, when placed between support and work, they will lie at a small angle to the sur- face of the chuck. The edges of the plates are beveled, and the beveled edges are placed as shown; when the current is turned on, the plates are pulled tightly against the work, clamping it to the CLAMPS EE —EE ——e | STEEL PLATES chuck.—John Homewood, Ontario, Calif.

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Stacking Hay by Gravity A western rancher raises alfalfa in summer on the plateau above a swiftly running river, which never freezes. His home and feed lots are located in the river valley below. It was not long until he encountered troublé in hauling the a

A Western Rancher’s Method of Stacking Hay by Grav- ity: His Crop is Raised on the High Land, Whence It is Shot down a 400-Foot Chute to His Feed Lot in the River Bottom

hay down to the river bottom, and he proceeded to eliminate the necessity of hauling, as well as much labor, by build- ing a chute from the hayfield above to the feed lot. The chute is about 400 ft. long, about 8 ft. wide, and has a semi- circular cross section. Throughout most of its length the chute rests on the earth. The lower end, being elevated so as to form a stack, is carried on a timber frame. From 50 to 75 tons of hay are shot down the slide each season, and a load can be put down in the same time as re- quired to put it on a stack below, as a stacker is also used at the top to move the hay from the wagon and drop it onto the chute. Flesh or Grain Side for Belts Many discussions have taken place in the past as to whether the grain or the flesh side of a leather belt should be run next the pulley. Definite data were en- tirely lacking, however, until a series of tests, covering a period of more than two months, and using five 4-in. single-ply belts, made by various makers, each belt

POPULAR MECHANICS being 30 ft. long, were made at Cornell University. All five belts were thoroughly run in before the tests, and every effort was made to reduce the possibility of error to a minimum. The method of testing was to take horsepower readings from the belts, when running on each side, the power being increased gradually until four per cent slip was reached. The results indicate clearly that the grain side is undoubtedly the best for power transmission, the flesh side transmitting, under shop conditions, on an average only about 50 to 60 per cent as much horsepower as the grain side. Under a higher tension than is usu- ally found in the shop, however, the flesh side shows a higher efficiency than this; under very favorable conditions, as high as the grain side. The tests show that there is a distinct advantage to be gained by running a belt with the grain side next the pulley. Lever for Tailstock Handle When drilling large holes in the lathe, extra leverage on the handwheel of the tailstock spindle makes the work easier for the operator. The attachment il- lustrated forms a handy way of get- ting the extra pressure against the drill point, as it is quick-acting and need not be removed from the handwheel in or-

> ae / ae EE der to clear the SC ELEATHER lathe bed. The T “J é “ae O lever is made from a oe as 7s” two pieces ofcold- =< rolled steel, one of 14 by 114-in. flat stock, which is forged to form the forked section, and the han- dle, made of stock to suit the width of the wheel. The ends of the fork are bent over to conform to the contour of the wheel, while the handle is turned at one end to form a good grip, and drilled near the other for the stud that holds it to the fork. The end of the handle is filed to the same radius as the wheel, and a piece of soft leather is passed around this end and held in place with screws. Down- ward pressure on the handle causes it to grip the wheel tightly, and apply the necessary pressure. When the lathe bed is reached, a quick upward movement re- leases the wheel and enables the oper- ator to take a new grip. (FOR STUD

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POPULAR MECHANICS Raising a Water Tank 25 Feet As a rule, when increased height is required for a water tank, the old one is scrapped and a new one erected, or if the condition of the old tank warrants, it is dismantled and then rebuilt on a new support; both of these 949 proper, to prevent it from falling or mov- ing under the influence of the wind. Each of the guys was provided with a tackle block, and as the tank was raised, the guys were slacked away, while keeping them tight enough to hold the structure steady. When the tank had been raised the proper distance, the methods involve the ex- penditure of consider- able time and money. — The photographs il- lustrate a method by 4 which a 60-ton tank was elevated a distance of 25 ft., and new sec- tions built into the steel tank support, without disturbing the tank. A wooden support was built around the base of the tank, the corner members of which were 14 in. square and 40 ft. long, while the rest of the framework and the braces were made from 8-in. timber. Two heavy chain falls new ironwork section was slipped into the gap and joined to the bottom of the old steel frame. The new sec- were fastened to the crosspieces, at opposite corners, and cable tackles and winches were attached to the other twocorners. The cables were then fastened to each corner of the tank supports. Six guy wires were at- tached to the bottom of the water tank Left: Building a New Testing Engines at the Muffler Many present-day automobiles are built without muffler cut-outs, and with such effective mufflers that it is difficult to tell, from the exhaust, when the engine is missing explosions. In a noisy shop the exhaust can hardly be heard at all if the throttle is nearly closed. Under such conditions, a strip of tin can be used to determine when the engine is “hitting” on all cylinders. This strip, which should be about 12 in. long and 4 in. wide, is held by one end in the fingers, so that the opposite end rests over the exhaust-pipe opening. The rhythmic striking of this tin strip on the pipe indicates perfect operation. A pause, or “miss,” in the stroke is noticed when explosions are missed, regardless of how slowly the engine is operating. By this means, adjustments may be made on the spot without the necessity of a road trial. Raising a 60-Ton Water Tank a Distance of 25 Feet by Section into the Old Steel Frame. During the Lifting, the Tank was Craged by Six Guys Fastened underneath the Tank. As the Tank was Li Right: ted, the Guys were Lengthened tion measures 24 ft. square, and the tank now stands 100 ft. in the air.—W. K. Crosson, Detroit, Mich. Scale Used as Depth Gauge Mechanics and others who frequently have occasion to measure the depth of small openings such as countersunk holes, short slots, and the abies like, will find the EDGE GROUND - scale altered as illus- ~] trated very conven- ient, because, as a rule, the width of the ordinary machinist’s scale is too great to permit the taking of such measurements. To convert the ordi- nary 6-in. pocket scale into a combination scale and depth gauge, it is only necessary to grind away one side of it for a short distance from the end, reducing the width of the scale so that it can be used in the smallest opening encountered.—P. A. Daschke, Astoria, N. Y.

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Magneto and Generator-Testing Base By J. V. ROMIG N° electrical-appliance repair shop, or even garage, is complete in its mag- neto and generator department unless it KNURLED NUT- is shaped with a boss, and, when drilled and tapped, is used as a nut for the adjust- ing screw; this piece is fastened to the angle members by small 14-in. round-head screws. The adjusting screw is 4 made of steel, and is fitted with a knurled handwheel, 3 or 4 in. in diameter. The clamp that holds the electrical units down on the base is built up of % by 2-in. flat-bar stock, riveted to- gether, with g¢-in. spac- ers between the two sides. One end of the clamp slips under the tightening nut in a longi- tudinal direction while the other swings radially, making a handy and quick-acting clamp. By notching it out in the center, as shown, it will hold the units under test tightly and squarely, and prevent them from slip- ping around. Holes are When Testing Magneto and Generator Units, Some Sort of Test Stand is Required to Hold the Piece Securely If It is to be Tested under Service Conditions. The Device Illustrated Eliminates Vibration While under Load has a testing stand or base on which to clamp the repaired units and test them under actual running conditions. In the device illustrated, the generators, starting motors, or magnetos are held rigidly, and a 14-hp. electric motor is large enough to drive nearly all ordinary types of gener- ators and magnetos. The magneto or generator is placed on the sliding base of the tester, the pulley adjusted in line with the driving pulley on the motor, and the clamp tightened. By moving the base away from the motor, which is done by turning the adjusting wheel on the front of the device, the proper belt tension is secured for driving the unit under test. Cold-rolled steel is the best material for building the base, a piece % by 7 by 15 in. being used for the bed. This is bolted to two pieces of 1 by 2-in. stock, shaped as shown, to form the feet of the tester. The sliding base proper is made from a piece %4 in. thick by 7 in. wide and 10 in. long. This piece is fitted with angle members on its sides, to make a carriage that will slide on the bed, and is also drilled and tapped for the two upright standards, which have a short thread on their lower ends. A flat piece of brass, 950 drilled in the feet, and the device is bolted to the bench in line with the motor. The motor switch should be mounted underneath the bench, to prevent it from being damaged by accident. Acetylene as a Primer for Cold Engines There is no question but that acetylene gas is very effective when used to start cold or balky internal-combustion en- gines, but in the opinion of many engi- neers of wide experience, such use is very dangerous. The explosion of acety- lene gas is so much more violent than that of gasoline or kerosene vapor, for which the engines are designed, that there is considerable likelihood of blowing off the cylinder head or breaking the piston. Acetylene gas is more easily ignited than a mixture of gasoline vapor and air, especially at low temperatures; with some motors, if reasonable care is exercised, no accident is likely to occur, but with others, especially with those having heavy fly- wheels, representing considerable inertia, it is highly probable that the cylinder head or some other part of the com- bustion chamber will give way before the flywheel has turned sufficiently to remove the pressure, by permitting the piston to

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POPULAR MECHANICS move on the downward stroke. This is also largely true of ether uSed as a primer without dilution. The use of an open flame in the air intake of an internal-combustion engine, as an aid to starting in cold weather, is seldom recommended, strange to say, yet this is very effective, offers no danger to the operator and practically none to the machine. Jack Prevents Distortion of Pistons The illustration shows a device used to avoid the danger of springing pistons out of shape when new pin bushings are to be fitted. It consists of a round steel body, the smaller diameter being -thread- ed, and the head having a recess cut in it to allow the bushings to project the proper amount through the boss without coming into contact RECESSED x. 4 i ™.. I with the jack. The threaded shank is fit- ted with a hexagon nut, the outer face of which is recessed in the same manner as the head on the oppo- site end. To use the jack, it is placed between the pin bosses, screwed tightly against them, and the bushings are inserted, after which the nut is slacked far enough to allow the device to be removed.—Edwin Kil- burn, Spring Valley, Minn. RECESSED HEAD A Riveting Kink In cases where a stud is being turned in the lathe for insertion into any part to which it is to be riveted, the work of riveting can be greatly facilitated, and a more permanent fastening obtained by means of a simple dodge. This consists in cutting a concave spot in the end, as shown in the drawing; the result- ing ridge is quickly upset with the ball peen of the machin- ist’s hammer, and con- siderable time is saved, as the ridge turns over quickly under the hammer blows and provides a substantial head.—G. A. Luers, Washington, D. C. STUD SPOTTED AFTER RIVETING 951 Scribing Long Straight Lines When a long straight line is to be scribed on a metal surface, and no full- length straightedge is available, a close approximation can be reached, with care- ful work, by means of a fine steel wire, PAPER UNDER RULE = | | - CLAMPS FOR WIRE STEEL RULE OR_ STRAIGHTEDGE. STEEL WIRE AMP FOR WIRE ; When a Long Straight Line is to be Scribed and a Single Straightedge of Sufficient Length Is Unavail- able, an Approximately Exact Line can be Drawn by Alining Two or More Straightedges tightly stretched, and clamped to each end of the work. In the drawing, a stee! bar is shown, as a simple example, which requires a line scribed down its length. The wire used is preferably steel piano wire, although iron or copper wire can be made to serve. There must be no kinks or bends in the wire, and to help remove such as are not noticeable, clamp one end of the wire in a vise and stretch it by hand as much as the material will stand without actual rupture; then do not allow it to become bent before using. Stretch the wire as tightly as possible upon the work and clamp the ends; if the scribed line is to extend to the ends of the work, carry the wire down over and clamp it at some other point. Make sure the wire does not touch the work enough to be thrown out of true, though it should lie as closely as possible to the surface. Shim up under the ends paper or thin metal if necessary. Then procure two or more steel rules or straightedges and clamp them along so that their edgés just touch but do not move the wire. Use a magnifying glass in setting them, if accuracy requires it. After the straightedges are alined and clamped, with thin paper under them as a safeguard against slippage, remove the wire and scribe a line against their edges. with @Small protruding points in the bottom of the box that retains the oilstone, will prevent it from slipping when it is used on the bench.

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Protecting Small Thread Gauges Thread gauges of the smaller sizes used around the shop very frequently have their usefulness impaired by the numer- ous knocks they receive in the course of the day’s work. Often, too, vibration will jar the gauge off the bench, or some heavy tool will be dropped on it by the care- less or busy mechanic. Accurate thread gauges are expensive to make, and are well worth protecting; for this purpose the device shown in the drawing will be found simple and effective. A sleeve is made to fit the largest diameter of the gauge, and long enough to cover its en- tire length. A slot is cut in the sleeve for about half its length, and at right angles to this, near the slotted end, a hole is drilled, and a pin driven in. The gauge shank is then drilled, close to the end, a drive fit for a *2-in. wire, after which it is inserted in the sleeve, and a piece of the wire is driven in. The ends of the wire are bent over the end of the shank in the manner shown, and adjusted until the ends will just spring over the pin in the sleeve. When in use, the gauge is pushed forward by grasping the bent wire, and when not in use, it is pushed back into the sleeve until the ends of the wire snap over the pin. -BENT WIRE Type Cases to Hold Small Parts Every workshop has as a part of its stock or equipment an assortment of small screws, nuts, bolts, and similar small articles, which are difficult to store and classify. To keep these things in order and within reach when wanted, requires a number of small compartments or con- tainers. One of the best ways of sorting and keep- ing in order such a stock of small articles is to use printers’ type cases. The case is a drawer about 32 in. iong, 16 in. wide, and 1% in. deep. It is divided into small compartments by wooden partition strips. A “double” case has 49 compartments or “boxes,” 2 in. square, on each side, or a total of 98 divisions. A “triple” case has three lots of boxes, 14% by 2 in., or a Several other total of 147 compartments. POPULAR MECHANICS arrangements of the partitions and divi- sions can be obtained. The boxes or compartments give room for but a few of each of the pieces and parts, but they provide a rather complete stock in a very small space, where they are always kept in order and ready for use. Old type cases can be obtained at bar- gain prices from print shops and supply houses, or new ones, together with stands for holding them, if a number are to be used, can be obtained from type founders. Such a case, mounted as a drawer, underneath a bench, will quickly prove its value.—]James W. Cottrell, Ham- monton, N. J. A Simple Punch and Die A die for experimental work, which is simple and economical of construction, is shown in the drawing. The die is made of casehardened machine steel, and is screwed and doweled to a cast-iron stripper. The shape of the sree. PUNCH die is scribed WASHER off onto the stripper, which PYE5ER is then ma- chined out to fit the punch. The punch should be made a good fit in the strip- per,asitserves DIE as a guide for the former. The punch is made suffi- ciently long to permit a rubber washer or sleeve to be slipped over it; this sleeve rests on top of the stripper plate. A hole is drilled near the top of the punch for a pin which holds a steel washer in place against the rubber. The rubber sleeve is compressed when the blank is_ being punched out, and is strong enough to pull the punch from the stock. Such a die can be operated in a vise or arbor press. STRIPPER Testing Ink for Acid A simple method of testing ink, or other fluids, for the presence of acid, consists in dropping some of the liquid under sus- picion into a solution of washing, or bak- ing, soda. If the ink is acid, the result- ing reaction betwéen the acid and the alkali will cause foam to appear. Blue litmus paper can also be used; this turns to a red or pinkish tint when brought into contact with an acid.

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POPULAR MECHANICS Tightening Nuts with Rounded Edges When repairing the car, it often hap- pens that nuts which are to be removed from some awkward location have been “chewed up” to such an extent that the edges have become rounded, and it is difficult to grip them properly. A socket wrench will usually slip around over such a nut without moving it, especially if the wrench itself is a little worn. One car owner, who does his own repairing, finds that by placing a piece of fairly heavy cloth over the nut, and then forc- ing the socket wrench over this, nuts in this condition can be loosened or tight- ened easily —A. E. Swanson, Los Angeles, California. Trimming Drawings with a Knife When trimming drawings with a pocketknife, using the T-square as a straightedge or guide for the blade, it often hap- pens that the blade of the T-square is damaged. To prevent this, yet insure that the drawing will be cut in a straight line, a narrow slot can be cut in atrian- gle through which the point of the knife blade is inserted. In trimming a drawing, the T-square is placed so that the slot in the triangle will fall on the trim line; it is then only nec- essary to insert the knife blade and draw it to the right, the triangle sliding easily along the edge of the T-square—A. K. Harrison, Chicago, II. Grinding Holes Straight A simple visual method of testing holes for straightness, while grinding, is as fol- lows: When the wheel is in to the full depth of the hole being ground, feed it to the opposite side until it just touches the wall. Then withdraw it frem the hole and note the sparking. If the sparks are heavier near the front of the hole, the diameter is smaller at that point. When the grinding wheel is moved over to the opposite side and the sparking is the same throughout the bore as the wheel is with- drawn, the hole is straight. 953 Preventing Hasp from Breaking When a padlock hasp becomes jammed between the door and its frame, it is not uncommon that the hasp is broken or pulled from its fastenings. Natu- rally, if the hasp could be kept out of the way, this would not hap- pen. The arrange- ment illustrated not only keeps the hasp from be- tween the door || and frame but || does it automati- cally. A hole is drilled in the hasp at the point shown, and a bicycle spoke is run through it and fastened to the door frame with staples, so that it can just slide. Owing to the tendency of the springy wire to straighten itself, the hasp will be thrown back automatically as soon as the lock is removed. "igi W\\ e/a Adjustable Block for Hacksaw Vise The movable jaw of a hacksaw vise is made to swivel on a stud or screw in order to get a firm grip on rough work, that is, in conse- quence, probably of unequal width. This, however, is the cause of a great loss in time when it is desired to hold short met y Wf, f j / f pieces of work fig it which may be |Psag/es - \G = less than half the rc ~~ WORK =A length of the vise TE a jaws. It is im- | SCREW possible to hold such pieces securely without packing up the other end of the jaws to the same width as the work to be held. The attachment shown in the drawing will be found much handier than the usual array of nuts, washers, broken saw blades, etc., generally used. The fixture is clearly illustrated, and is simply a piece of flat stock bent over at one end and tapped at the opposite end, as close to the vise as possible, for a knurled screw. The work is held between the attachment and the movable jaw, gripped tightly, and the screw tightened against the oppo- site end of the jaw.

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Some Ingenious Uses for Dynamite By J. L. BALL T requires an emergency job to sharpen the wits of the mechanic to a keen edge; this is especially true around mines, where crude methods are sometimes re- quired to get results, and some of these Left: A Sheave Wheel from the Headframe of a Coal Tipple, Removed Center: The Effect of Two Charges of Right: Blasting Out a Tight Key without Injury to the Shaft. Explosive on the Sheave Hub. methods are as unusual as they are ef- fective. It was necessary to replace some sheave wheels because the rims had be- come badly worn by the hoisting cable. These sheaves, or bull wheels, are in the headframe of the tipple, and should one of them fail from any cause, the damage would be considerable on account of the heavy weight of the steel cages and the loaded pit cars, The new sheaves were exact duplicates of the old ones, and it was planned to use the old shafts, to avoid the necessity of fitting new journal boxes. After every known method had been used, without success, in the attempt to remove the old shafts, it was suggested that dynamite be used to burst or crack the hubs. The wheel was blocked up, 1-in. holes, 6 in. Planting Sweet Corn That sweet corn planted in June gives the best quality of corn is the conten- tion of many expert gardeners, who main- tain that the very highest quality is not obtained by earlier planting. Sweet corn sown in the early part of May will produce a crop for the table in the latter part of July or early August, just when the summer is usually hottest. In these sizzling days the corn ripens so rapidly that only a portion of it can be picked at top quality. However, smaller early plantings, with the heavier plant ings in June, will bring out the bulk of the crop during the last of August and early in September, when the weather is not so hot, so that the corn will ripen more slowly, and its quality remain at 954 deep, were drilled in the hub at two op- posite points, and a V-shaped notch was chipped from the hole to the outer edge of the hub. It required a half stick of dynamite, fired separately on each side of the shaft, to crack the hub, the shaft not being injured in the least. The left and center illustra- tions show the _ sheave before and after firing the charge. The teeth of a large solid gear wheel of a clay-grinding machine were so badly worn that it was necessary to re- place it with a split gear. The position of the gear, however, was such that it required considerable work to get at th« key. A very small piece of 40-per-cent dynamite was placed in the keyway oi the shaft and fired, driving the key out quickly. It will be well to remember that but a small quantity of explosive is re- quired to do this work, and experiments should be made to determine this quan- tity, in order to avoid injuring the shaft and bearing. In another case two cracked spokes made it necessary to remove a 6-ft. fly- wheel from a high-speed steam engine. The key was quickly removed by placing a small piece of dynamite behind the head of the key, as shown in the right-hand illustration, the end of the key being sup- ported by a stout bar, to prevent its being bent downward, its best for a longer time. Corn is likely to remain longer in the “dough” stage in cooler weather, and be available for the table over a longer period. Plant- ings of corn 10 days apart until the end of June, provided the first was planted early in May, will give a crop succession from the last of July until well into Sep- tember. Corn planted in June gets a faster start because of the warmer weather, and grows more rapidly than that planted earlier, the young plants developing un- der ideal temperature conditions, which is also another reason why June corn is likely to have finer ears and be of better quality. When the corn has reached a height of about a foot, a light sprinkling of nitrate of soda is of great benefit. Avoid

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POPULAR getting the nitrate upon the leaves of the plants, and rake it lightly into the soil. When the corn is from 2 to 3 ft. high, some of the balanced fertilizers, or bone meal, can be sprinkled lightly and hoed in; that is usually all that is necessary to produce a good crop. These extra appli- cations will not be necessary if the soil is good, is rich to start with, and has been manured, but if there is any doubt about it, or in the absence of common manure, they will insure a good crop. Making a Clutch Shifter Stay “Put” A manufacturing concern had trouble in making the clutch on the countershaft of a bolt cutter stay in the forward, re- verse, or neutral positions, until the de- vice illustrated was installed by one of the foremen. Two pieces of % by 1%4-in. steel were welded together at right angles to make a T-shaped piece, the horizontal member of which is screwed to one of the overhead timbers. The other member extends down, PIVOTS aagt” parallel to the STUDS °£ - ts shifter lever “ ee ter is in neu- 3 fo \ : | tral. To the eo iae ie end of the We = - vertical mem- yy —h ber of the T SPRING \\/, | | x a short length | ‘\ of the same \) stock is piv- ‘cciaie | oted, making a link that is free to swing to either side of its station- ary support. Another link connects the shifter lever to the end of the pivoted arm in the manner shown. A coil spring is hooked over a stud riveted into the upper link near the lower pivot stud and over another located near the angle of the T. When the shifter lever is perpen- dicular, the link and spring are perpendic- ular also, and the lever has no tendency to move in either direction, but when the lever is thrown either to the right or left, the spring shortens and holds the clutch firmly.— Ralph Hanenkratt, Northville, New York. @The hole in which a broach is to be started should be drilled or bored. Using a broach in a cored hole soon impairs its accuracy. The face of the work that rests against the faceplate must be true with the bore, otherwise accurate work is im- possible. MECHANICS 955 Novel Tap Holder for the Drilling Machine Very often it is found necessary to re- tap large batches of nuts, which, for some reason, are too small. The holder shown is very convenient for securing and driv- ing a tap quickly without any tightening device, thus ena- bling the operator to insert and with- draw the tap while the machine is running. The shank of the holder is turned to fit the drill chuck, —- HOLDER SLOT while a slot, the ! width of the ——— square on the tap, 7A is cut across the 8 frontend. Acol- — + lar is made, of the g git same diameter as the holder, and fastened to the lat- ter by two screws, Between the collar and holder two rubber washers are placed. With the nuts held suitably on the drill-press table, the tap is pushed up in the holder. The rubber washers, being a wringing fit on the tap shank, will grip the tap sufficiently to keep it from falling, while the slot, of course, receives the square end of the tap shank and drives it. As many nuts as the tap shank will hold are tapped before the tap is pulled out and the nuts taken off.

RUBBER WASHERS Keeping the Drawing-Board Drawer in Place Draftsmen and artists using drawing boards of the type with a drawer on the underside, sometimes forget the presence of the drawer and tilt the board, dump- ing pencils and other ma- PAPER CLIP f

terials onto SJ the floor be- 5 causethe for, drawer slides tres out. In order | jasy to overcome TACY . i i Aone this objection, WY

and keep the drawer in its proper place on the drawing board, a paper clip is bent in the manner shown, thumbtacks being used to fasten the wire to the side of the drawer and the drawer slide respectively.

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956 POPULAR Potato Planter Made from Old Corn Planter The owner of the old corn planter shown in the photograph saved consider- MECHANICS in their place two wooden boxes of the same size were attached. A hole was made through the bottom of each box, at the inside corner, and a length of gal- vanized-iron spouting was run down to within 3 in. of the bot- tom of each shoe. In using the planter, one man sits between the boxes and another drives A peck or more of pota- toes is placed in each box, and the cut potatoes are dropped through the holes in the boxes into the furrows. The ground should be prepared for planting by using a corn lister, which ridges the ground, leaving furrows between the ridges. After An Old Corn Planter That was Made Over into a Serviceable and Effi- The Seed-Potato Cuttings are Placed in the Wooden Boxes and Dropped through a Spout into the Furrows cient Potato Planter: able money when he conceived the idea of making it over into a potato planter. The seed-corn boxes were removed, and Windlass Holds Hay on Truck With the introduction of fast motor- truck transportation into the business of farming, there came a demand for some means of securing loose hay in a manner that would make fast delivery safe. The solution comes in the form of a windlass. ‘With this arrange- ment, the ends of a rope are fas- tened to the for- ward corners of the truck body, the loop is passed over the top of the load, and down to the rear frame, where it is wound around a windlass; this draws up the -rope tightly. The windlass consists of a roller, in the center of which a pin is driven to hold the loop of the rope. The roller is mounted in brackets on the rear of the truck bed, with sufficient dis- tance. between the roller and truck to clear the rope. The windlass is turned by a rod, passed through a hole in the roller, and when the load has been tightened, the the potatoes have been planted, they are covered by driving a harrow over the ground. This method is much quicker than planting by hand, and when large tracts are to be seeded, there is considerable saving. rod is allowed to bear against the frame so that it prevents the windlass from un- winding, but is still immediately ready for use. This last feature is one of consid- erable importance, since the hay will often settle, after a short distance over rough or bumpy roads, to such a degree that the rope will have to be drawn tight again, before further progress, without danger of spilling the load, can be made.—Roy A. Houston, S. Charleston, Ohio. To Prevent Nails from Splitting Thin Wood Having to nail a number of narrow strips, I found that the brads, as ordina- rily used, would split them. Accordingly the points of the brads were flattened out or cut toachisel-like point. By driving the nails with the chisel end at right angles to the grain not a strip was split. Of course, a bradawl would have answered the same purpose, but, even had there been one handy, it would have been a tedious job to punch a hole for each brad. Where the grain of the lower piece is at right angles to that of the top one, and is in danger of splitting, the nail is driven through the first piece as described, then given a quarter turn with a pair of pliers and driven home. This idea has been used on 20-penny nails with success.

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. ; i i il i ma ateur. .N tH TANT MM nr al Information as to where to obta to obtain any specified ( materiais or parts for making objects described in the following pages may be had, from our Bureau of Information.—Editor. on request, A Motorcycle Delivery Truck By J. R. KOONTZ | cg several years we have had in use on our farm what one might call a “speed truck,” one for quick delivery, where the weight of the load is not over 300 Ib. It is very handy and useful, and there are hundreds of old motorcycles that have been discarded, not because of mechanical imperfections, but because of make of the cycle used, but in general will not have to be very different from those shown in the illustration. Stake sockets are bolted to the sides of the plat- form. These are made of flat iron, bent to hold the stakes on the side racks, which have strips nailed to each end to form grooves into which the end members Upper Lats ment of the Body Irons. Upper Right: A Rene Up Trip from Town with a Load of Binder Twine. Barrels of Oil for the Farm Power Appliances. Lower Left: Side and End Members of the Rack Body. Lower Right: A Load of Two Construction of the Platform Frame and Arrange- The Part at the Left Is a Cover for the Body their shabby appearance, that are just the thing for such a truck. If the motorcycle is equipped with a sidecar, so much the better. Remove the sidecar from the frame or springs and build the platform shown to take its place. This is built up of a framework of 2 by 4-in. lumber, covered with 1-in. boards. The necessary iron fittings for attaching the platform to the sidecar frame and motorcycle will vary somewhat with the of the rack body fit. Two iron rods, threaded at each end and provided with nuts and washers, will be needed to hold the sides securely against the ends. The narrow strips shown in the upper right- hand illustration are used to make the openings in the rack smaller, for hauling chickens, and a cover for use in the same connection is also shown. A detachable seat can be made for carrying a passenger when necessary. 957

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958 POPULAR A.truck thus made can be used with profit on any farm, as a gallon of fuel will go twice as far in it as in any other truck that can be made or used; it is especially handy for hauling milk to the station, but there are innumerable other uses for it. Homemade Soldering Blowpipe It is possible to convert the burner part of a “junior” incandescent-gas lamp into a soldering torch that will eliminate SECTIONAL VIEW OF TORCH \ | ell PORCELAIN TUBE PART OF GAS j BURNER USED, ~ HOSE , -~ SOLDER By Using the Burner from a Small Type of Incan- descent-Gas Light, a Simple Soldering Torch can be Made. The Burner can Still be Used for Its Original Purpose the necessity of using a soldering iron, except possibly for smoothing off the work. A short length of pipe is screwed into the bottom end of the burner for attach- ment to the gas hose, and a 1-in. length of porcelain-tube insulator is inserted into the upper end, to form a nozzle. The porcelain-tube insulator can be ob- tained from any electrician, and is the kind used to insulate electric wires pass- ing through woodwork. All that remains is to connect the burner to the gas supply with a length of rubber hose, and adjust the supply of fuel at the mixer—Herbert A. Strickler, Buffalo, N. Y. How to Lay Sod Properly Sod obtained on open land, as, for ex- ample, from close-cropped pasture, is the best for lawns. Such sod is exposed to the heat, and, being able to withstand drought, will naturally flourish under the excellent treatment it gets when removed, reset, and given water and every atten- tion. If a drought should occur, this sod is better able to adjust itself to conditions than that taken from cool, sheltered places, where the grass is tender, and more apt to suffer from exposure to the MECHANICS heat of the sun. The average sod is laid down dry, on a dry surface, and then watered on top; this being so, it is a wonder that more lawns do not die before they can be brought into good condition. It sometimes takes two or three weeks of constant watering and attention to get sod laid in this manner started, while, if some attention were given the matter in the beginning, no trouble would be expe- rienced. A good idea is to bring in the sod in the afternoon before the day it is to be laid. Prepare the lawn for laying by working it up; then sprinkle it moder- ately. Now arrange the sod in about the place it is to be grown, grass side down. After laying the sod in- this manner, sprinkle it. Allow it to remain in this condition overnight, and start turning it early in the morning. Sod treated in this manner will take root and grow at once. Bags Quickly Placed over Clothing A commercial dyer and cleaner uses a device that may be of use to others in the same line of business, and that will | also be appre- ciated in homes where the spare clothing and heavy winter garments are kept in moth- proof bags in the clothes closet. The device consists of a long hook, made of flat iron, which is suspended from the ceil- ing at a convenient height above the wrapper’s head. The bag is slipped up until its lower edge rests on the hook, then the clothes hanger, bearing the coat or other garment, is hung on the hook and the bag slipped down over it. The whole operation requires less time than the telling of it; the desirable features of the device will be apparent to anyone who has struggled with a long moth-proof bag. @ When a car is driven in rain or snow and the headlights are fogged, point the spotlight directly on the engine hood. This makes it easy for other drivers to see the machine, so that accidents are prevented.

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POPULAR MECHANICS Portable Pen for Chicks Growing chickens require green food if they are to thrive to the profit of the owner, and this is best provided when they have free range over a large field or lawn. Such freedom is not usually pos- sible in the town or city, but movable pens can be made to keep the chicks under proper restraint. Such a coop, that adapts itself to surface irregularities and that can be easily rolled up and moved from place to place, is made from ordinary lath and wire. A number of laths are cut in half, and wire is interlaced at the top and bottom to hold them together, two strands at the top and two at the bottom, At intervals, a somewhat longer stake, with the point sharpened for insertion into the ground, is provided. The pen can easily be set up in the form of a square or circle by bringing the ends together and driving the stakes into the earth—G. E. Hen- drickson, Argyle, Wis. Padlocked Door Opened from Either Side A plumber occupies half of a jeweler’s store as a showroom and has his shop in the basement, driving into it through an alley in the rear. There is also a stairway into the basement from the first floor. When the plumber was in the store and wanted to take his truck out, it was neces- sary for him to walk a considerable dis- tance to get to the rear of the building and unlock the Na al padlocked door. SLOT Doors — \ In order to make ( it possible to SMA open the rear basement door from the inside, the arrangement shown in the drawing was used. A piece of flat iron, drilled at each end to accommodate the padlock and a long bolt, passes through the eye of the hasp and through a slot cut in the door. The pad- lock is fastened through the outside hole and the bolt is slipped through the hole of the link which projects inside the door. A short piece of wire is used to pull the link through the slot, when closing the door from the inside.—S. A. Asquith, Los Angeles, Calif. 959 An Airplane Swing Much more thrilling and nearer to fly- ing itself than the sensation obtained from riding in an ordinary rope swing is a (*) SIDE VIEW — a iene SEAT supports [/\t-y i All the Thrills of Riding in an id Airplane are Afforded the Chil- dren by a Swing in Which the Occupant Rides in a Model Air- plane Body Made from Light Wood and Wallboard, Suspended by Wire Rope the experience of sailing through an arc in a dummy airplane that is proof against side-slipping, tailspins, and similar mis- haps. An airplane swing can easily be assem- bled, and will furnish endless amusement for the children. The triangular hangers are made of % by l-in. stock, put to- gether as shown, and the rest of the body is made of wooden strips, covered with wallboard. The ends of the hangers are bolted to a triangular steel plate, which has a hole drilled through its upper end for the accommodation of a hook. The planes are made of single sheets of wall- board, nailed to the woodwork, a segment being cut out of the rear edge of the up- per wing to allow the occupant to get in and out easily. No control stick is needed, as there are no movable surfaces, and the rider can hold on to the front members of the hangers, or an extra crossbar may be put between the members for that purpose. Bolts, with nuts and washers, should be used for joining the parts wherever pos- sible, because, owing to the strain, the pieces would pull apart in a short time if held together with nails. The swing should

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960 be suspended, preferably, by wire ropes, in. any good spot where there is plenty of clearance for the body, and at a con- venient height to enable the occupant of the swing to get in or out easily —Donald W. Clark, Buffalo, N. Y. Saving Room Space Considerable space can be saved inaroom in some instances if the bureau is quite literally “built in,” something after the idea suggested in the draw- ing. This is particularly applicable when parti- tioning off at- tic space into rooms, as there is al- ways a great deal of unoc- cupied space in the angle formed by the partition, joists, and rafters. This makes a much more attractive and sanitary room than where no partition is employed, as the partition may be deco- rated, and the room is easily kept clean; it is almost impossible, without a vacuum cleaner, to remove all the dust from the angles of the usual attic room.—L. S. Sterling, Delanco, N. J. Keeping the Medicine Dropper Handy The medicine dropper is needed only seldom in most families, but when it is needed, it should be right at hand; to insure this, the on ant simple little device shown in the «BENT drawing can be ieee made in a few minutes. Make a coil of spring- brass wire, giving the main portion about four turns, then bend up a single loop and bend the end of the wire down- ward, to make a straight, vertical should be filed to a This end sharp point, which can be stuck into the stem. cork in the bottle. Kept in this manner, the dropper is always “on the job.”—L. B. Robbins, Harwich, Mass. POPULAR MECHANICS Lens Hood Made from Drinking Cup The amateur photographer is usually advised, when taking pictures with the lens pointing more or less directly toward the sun or other source of light, to use a lens hood, or cap. The reason for this is to prevent the light from striking the lens directly and causing overexposed spots resulting from the reflection of light. A lens shield of some sort is also frequently necessary when photographing scenes of sunlit snow and water, where reflected light is apt to strike the lens. An excellent lens shade that collapses into a small space can easily be made from one of the familiar collapsible aluminum drinking cups, such as can be obtained for a few cents at almost any variety store. An opening is cut into the bottom of the cup just large enough to fit snugly over the lens mounting. The inside of the cup should be painted with some dead- black finish to avoid possible reflection. A Good Foot Scraper Ordinary types of foot scrapers fail in one thing: The bottom of the shoe can be cleaned on them, but the upper part of the toe, and the sides of the shoe cannot. —_— With the scraper : shown, every part of ms the foot can be reached. A long piece of flat- iron bar is bent into a deep U-shape, the legs being spaced about 10 in. apart. The closed end is turned back in the manner indicated, and the projecting ends are either thrust into the ground or fastened to the side of the steps. Holes are drilled as shown, to permit a section of to be fastened in the woven-wire fence top of the U. This square of wire acts as the scraper by means of which every part of the shoe can be cleaned. Growing Oriental Poppies The oriental poppy is the showiest and largest-flowered of all hardy perennials, with its great scarlet or orange cups above a mass of thistlelike foliage; in late May or June it is the sensation of the A single packet of seeds flower garden.

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POPULAR will provide more plants than any one garden can. ordinarily accommodate. They should be moved in August, as they are very hard to transplant, and invariably lose their leaves after removal, but these are not dead, and will appear again. It is best to sow the seed where the plants are to remain, rather than to transplant, and thin the seedlings out to about 2 ft. apart. This poppy entirely disappears after its blooming season, so that its loca- tion should be marked to prevent the roots from being destroyed by hoeing. It makes a growth of leaves in the fall so that its presence then can readily be determined. Opening Paint Pails The drawing illustrates an excellent way to open paint pails that are not fitted with friction tops. The center is cut out all around, about %4 in. from the edge of the can; this leaves a strip of metal that may be left flat, or bent slightly up- ward, and that prevents the con- tents from splash- ing over the edge of the container. Two slits are cut in this strip, about an inch apart, and the metal between is bent back, thus forming a convenient holder for the paintbrush. When the pail is not in use, it is best to cover it with a piece of cardboard, as this generally fits better and keeps out more air than a tin lid —Chas. Homewood, Ontario, Calif. Judging Prints for Good Sepia Tones When photographic prints are to be toned sepia, it is necessary that a pure black tone is obtained in the original de- velopment, in order that the prints, after redeveloping, may have the desired rich reddish-brown color. An effective way to judge whether any black and white print can be toned to a good sepia color is to view it by the light from a mercury-vapor light. If the black is not pure, it will have a grayish-black tone under this light, but, on the other hand, if it appears as a pure black it will produce a good sepia tone.— Chas. I. Reid, Dayton, Ohio. MECHANICS 961 Improvised Climbing Irons When a large flag became fouled around three of the flagstaff guy wires, the only way it could be untangled was for some one to climb the pole. To meet the situ- ation the man undertaking the job built the pole- climbing irons shown fn the drawing from %e by 1% by 134-in. iron. Straps, 1%4 in. wide and attached as shown to the irons, were provided to go round the flagpole and the ankles of the climber, the buckles be- ing placed on the outside so that they could be tightened during the ascent. A block of wood, curved on the underside to conform to the contour of the pole, is riveted just a little above the center of each iron. In use these wooden blocks operate as fulcrums when the wearer’s weight is applied, causing the strap to grip the pole tightly—Maurice Staller, Fowler, Ind. Hanging Framed Pictures When making a very light picture frame, 3 ft. 6 in. long by 12 in. high, and suspending it in the usual manner, the weight of the glass was found to cre- ate a strain on the lower part of the frame, and to exert a tend- ency to force the frame apart at the lower corners. To overcome this trouble, the picture frame was suspended as shown in the drawing, so that the whole weight of the frame was supported by the lower mem- ber. Two screwhooks are screwed into this member of the frame, and the wire or cord is passed through screweyes in the upper part. The supporting wire can also be arranged as shown by the dotted lines.

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962 Helps for the Berry Picker The harvesting of berries, and other small fruits, can not only be speeded up to an appreciable degree by the use of a) {= = aie > IN 9 5 4 Z = : : j Z ae Wl / peu Conveniences for the Berry Picker That Eliminate a Considerable Amount of Lost Motion, Making It Pos- sible to Harvest More Fruit with Less Exertion DOUBLE - DECKED WOODEN TRAY the simple ideas illustrated, but the work may also be made easier. Three wire brackets, of the type shown, are slipped behind the picker’s belt and serve to carry several nested boxes; this makes it pos- sible for the picker to carry several empty boxes so that the fruit can be sorted while picking. As the baskets are filled they are removed and leit on the ground, and later ‘collected in the double-decked tray, which is carried suspended from the neck. When picking, an aluminum drinking cup may be held in each hand so that the thumb and first two fingers are free to pick the berries and drop them into the cup, thus saving time by the elimination of much waste motion.—G. M. Beer- bower, Tarrytown, N. Y. Restoring Color to Tan Shoes It often happens that tan and brown- colored shoes, after.considerable polish- ing and wear, take on the appearance of black. When this happens, the shoes can be made to show some of their original color by removing all the old polish. This is done by rubbing them with a gasoline- soaked cloth. After allowing the gasoline to evaporate completely, the shoes are polished in the usual way.—A. C. Cole, Chicago, III. POPULAR MECHANICS Releaser for Parachutes It is a simple matter to attach a para- chute to a kite and release it after the kite is in the air. The simplest method is to soak a piece of loosely woven string in a saturated solution of saltpeter and let it dry. This prepared string is used as a slow-burning fuse. The parachute is attached to the kite or kite string with a length of the prepared string, in such a manner that when the latter is burned up, the parachute will be released. Similarly, the shutter of a camera can be opened, by arranging the trip lever so that it will be pulled hy a rubber band when the string burns down.—E. J. Bach- man, Fullerton, Pa. A Secret Box Lid A simple secret box lid, that is proof against being opened by anyone who does not know the secret, is made by pivoting the lid, near one end, by SHORTENED NAILS means of two == = ei nails driven as | through the | |= sides of the box into the edges of the cover. A hole is drilled in the middle of the oppo- site end of the lid to take a spring and a nail from which the point and head have been cut. When the lid is closed, the nail is pushed into a hole drilled in the end of the box, locking it securely. To open the box, it is necessary to push the bolt out of the hole in the box by inserting a heavy pin through a small hole, which leads from the outside to the nail socket, and by pressing down on the short end of the lid. The lid can be given the appearance of being solidly nailed by using shortened nails, and some other side may be made to appear as the cover. A shortened nail can be pushed into the small hole leading to the bolt, and, when in position, will conceal this perfectly. Some kind of mark should be made on the head of this nail, to distin- guish it from the corresponding one on the opposite end.—Frank Presnell, Chil- licothe, Ohio. SECTIONAL VIEW OF af

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HE radio-telephone receiver described in this article is of high efficiency, is very easy to build, and can be made for about one-third the cost of similar instru- ments now on the market, It has a nor- mal telephone receiving range of about 300 miles, although under exceptional conditions up to 400 miles can _ be reached; telegraph messages can be heard over a distance of 1,500 miles. Its A SHORT-WAVE RADIO- TELEPHONE RECEIVER By F. L. BRITTIN full-page drawing, thus allowing easy ac- cess to the circuit, and also permitting the builder to add one or two steps of ampli- fication at any time and inclose the whole unit in one cabinet. The full-page illustra- tion shews complete rear views of the tuner and detector, and also a front eleva- tion of the completed instrument. It will be seen that the binding posts marked from 1 to 5 are placed on each panel so that, Left: Rear View of Tuner, with Its Cabinet; Right: Complete Instrument. Note How the Binding Posts on The Use of a Cabinet for the Detector Is Optional Each Unit are Connected by Insulated Jumpers. wave-length range is from 150 to 400 meters, thus making it possible to receive the market reports, news items, children’s- hour stories, and concerts now being broadcast from many points over the country by government and commercial stations. A broadcasting station at Pitts- burgh, and the radiophone stations at Madison, Wis., have been heard in Chi- cago with this instrument, using but one tube. With two steps of amplification, it is possible to use a loud talker, enabling speech and music to be heard clearly throughout a large room. The completed instrument is in two parts, a lower cabinet, containing the tun- ing instrument, and a smaller one mount- ed on top, containing the detector unit. The latter need not be placed in a cabi- net, but may be mounted as shown in the when the instrument is assembled, post No. 1 on the detector is directly over post No. 1 on the tuner, and the others in cor- responding positions. The panels for both units are of %e-in. bakelite; that for the tuner is 18 in. long by 7 in. wide, and the detector panel 10 in. long by 7 in. wide. Templates for both these panels are shown in the full-page illustration also; the full-size outline of the panels, to- gether with the location of the various holes, should be laid out on a piece of cardboard, the cardboard cut to size, the holes drilled in the proper positions, and the templates used to mark the panels. The plate and grid variometers and the variocoupler are built up from knocked- down parts, obtainable from any radio- supply house. These parts may be had with or without windings. Those who 963

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964 POPULAR wish to wind their own coils and mount their own units should secure the neces- sary unwound forms, two _ stationary forms, measuring 14% by 4%4 in. square, and a rotor ball, 4 in. in diameter by 3 in. thick, being necessary for each vari- ometer, and a rotor ball and bakelite tube for the variocoupler. Each stationary form, or stator half, is hollowed out to take the stationary windings, in such a manner as to allow the rotor ball, with its windings, to be revolved inside the stator without touching the stationary coils, al- though they must be as close together as possible. The distance between the rotor and stator coils can be adjusted by means of the metal-strip bearings shown on each variometer. Each stationary coil of the variometer is composed of 30 turns of No. 20 single cotton-covered magnet wire. These windings are first wound on a ball form, supplied with the variometers; the coil seat in the stator half is coated with shellac, and the ball form car- rying the wind- ing is then MECHANICS or iron, threaded for 14% in., and has a ¥g-in. hole drilled through it, along its axis. A hole a little smaller than the diameter of the shaft is drilled through the ball, the shaft screwed into the hole tightly, and locked with a nut on the in- side of the ball. The front shaft is a piece of 144-in. brass or iron rod, threaded for half its length, and screwed into a hole directly opposite the tubular shaft. One of the flexible leads of the rotor coils is inserted into small rubber or “spa- ghetti” tubing and both leads brought through the rear shaft, one being soldered to the bearing strip, and the other led to the bottom screw on the stator. These flexible leads are made of small “litzen- draht” wire; this is easily obtainable. Both variometers are built and wound ex- actly alike. The variocoupler is also made up of two separate units, the pri- mary being wound on a bakelite tube, 214 in. high and 31% in. outside diameter, with a wall thick- ness of \%g¢ in.; 37 turns of No. 20 single cot- forced against ton - covered the seat and magnet wire clamped or are wound on weighted ; this tube, and when the shel- six tapsare lac has dried, —@ — —— 2 nen Ga, be- the ball form Yeriomasr Wound and Party Assembled: The RightHand View ginning with may be with- Shaft. One of the Tubular Shafts is Shown on Top of the Stator the first turn at drawn, leaving the bottom, the coils in place. These coils are wound clockwise and are joined together between the halves of the stator, near the rear, as shown in the rear view of the tuner panel, and also in the winding detail and con- nections of the variometers. The outside lead of one coil is brought out to a screw on the side of the stator, the outside lead of the other coil being soldered to a cor- ner of the rear bearing strip connecting the stator halves. The rotor coils are wound with 54 turns of No. 20 single cot- ton-covered magnet wire, 27 turns on each side of the ball. These coils are wound counterclockwise, the connections be- tween the windings being made on the inside of the ball, as indicated in the wind- ing detail, and the wire passed to the in- side of the ball through small holes drilled for that purpose. The outside leads are threaded through small holes running from the edges of the ball to the center, and are then soldered to flexible leads. The rear shaft of the rotor is 2% in. long, is made of 4-in. rod, either brass and spacing the taps equally to the top turn; the taps should be staggered, as shown in the rear view of the tuner panel, carefully soldered, and be led to the con- tact points on the primary switch on the panel. The lever of this switch is con- nected to the ground post, and the top end of the coil to the aerial post. The end of the first turn, at the bottom, is passed through a hole drilled in the tube, and clinched to hold the winding firmly. The top turn of the primary winding is clinched in the same manner, before be- ing led to the binding post. The second- ary is wound on a rotor ball similar to that used for the variometer, but 31% in. in diameter and 134 in. wide. Each coil is composed of 16 turns of No. 26 single cotton-covered magnet wire, the coils be- ing wound so that the current will flow in the same direction in each; the con- nection between the coils is made in the same way as on the variometer balls, but one of the outside leads of the rotor winding is connected to the front shaft,

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q

B-BATTERY SWITCH -—- PORTS -------- 080 , CONDENSER = de ¥ 4 f @+ ve : %& es —_—, - \ : | "| 3 " 7 2 e 2 a % o® one : ae g ~ =— 1: ” ~ : @ / a ae ee : oe BF as = mee i : 2 1 ~ eo JACK- x) TUNER-PANEL TEMPLATE, FRONT VIEW A Ty “ner l FILAMENT SWITCH ||}. sg) St | | | otey sa 7 sieu GRID Jeghs --- ” Bx Oo", | » VARIOMETER e°%e . Qo “IN , a , HL vv, Ee _ ab ge 3 - “he 2" 4 40™ 4 hog @ eo —ig--—t— | 9 ; AERIAL, sili 2" 4 @ _ vario- GROUND ile ° PRIMARY COUPLER Q) G) PLATE Ig 20 30 40 So VARIOMETER a ——eeeoeeeeS ee 1 | ae be nig ing : GROUND DETECTOR-PANEL TEMPLATE, VER War aT FRONT VIEW FRONT VIEW OF INSTRUMENT COMPLETED

Rear View of Detector and Tuner Units, Layout of Panel Templates, and Front Elevation of Complete Instru- ment: The Design Is Such That a One or Two-Step ~— inay be Added at Any Time, Using the Same Tuner and Detector. The Amplifier should be Built to Fit on Top of the Tuner Cabinet, beside the Detector 965

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966 inside of the ball, and the other to the rear shaft. These shafts are 44 by 2 in. for the front shaft, and ¥ by 1% in. for the rear shaft. The shafts are supported by bearings, in the form of metal strips, Ye by V2 by 3 in., drilled for the shaft, placed upright in the primary tube at the front and rear, and secured to it by small machine screws at top and bottom; the holes for the shafts should be drilled of such a size that the secondary coil will not rotate too freely, and the front and rear shafts should be connected to the bearings by soldered “pigtails” made of flexible litzendraht wire, to insure a good POPULAR MECHAN VX -ICS nections are made with No. 18 tinned- copper wire, covered with spaghetti tub- ing, although any good insulated wire of this size will do. All connections in the circuit must be thoroughly soldered. When the units have been mounted, the tuner unit is complete, with the excep- tion of the variometer dials, which read to 100°, and the variocoupler dial, which reads to 50 degrees. At the top of the full-page illustration may be seen the full details and connec- tions of the detector unit. The panel is mounted on a wood base, measuring * by 644 by 10 in., and is held in an upright ee, JOINED HERE TO STATIONARY COILS ~~~! --- JOINED HERE --- INSIDE ;ROTOR SECONDARY PRIMARY AERIAL $5 } J O..cROUND Complete Circuit Diagram and Connection Details of the Variometers: in P 1 f~ fi/ )\ \ iH \\\ 4 (/ \\ et Vike (Ue Ly a a0 ANU) , Nt \U —_2-MEGOHM ty 1 WY / wy! Y G.LEAK : STATIONARY / ROTOR’ COILS WV iL... CONS, Se ge “0O0S ' af ’ HX a, : ; 3 D &. _“ LEAD OUT OF G. COND. -d 135 | 194 ih —— STATIONARY 9 | ill ae SHAFT ~~~ ==. P COILS Fr | eal2t | — STATI R’ LEAD INTO ROTOR OFF, ON +3 STATIONARY COILS-. Si 7 _ MEAD INTO ROTO A —il | { | |! ees." : “# . TUBULAR SHAFT Q =4) iF ” (| ROTOR COILS INSULATED ~ ~ A-BATTERY JOINED ema FLEXIBLE , fan in\\ teh no LEADS} if | icsictieabiimenstas Pe (Ws - 4FRONT SHAFTZ X _— 7 EDGE ViEW_/ OF ROTOR r. | He METHOD OF S) — \\ .~ BRINGING OUT ‘ a ~ TERMINALS OF TUBULAR ROTOR COILS ; SHAFT ~~ YY ‘METAL TUBE SL FLEXIBLE REAR SHAFT : INSULATED LEADS WINDING DETAIL AND CONNECTIONS OF VARIOMETER — ~O me _PRIMARY O™-“Y SWITCH oO The Latter Show the Connections Only, and No Attempt has been Made to Show the Direction of the Coil Windings electrical connection. A lead from the front bearing is connected to post No. 1 on the panel, and a lead taken from the bottom of the rear bearing is connected to the screw that also carries the lead from the stationary coil of the grid variometer. The cabinet for the tuner unit is made of basswood, or other easily worked wood. The dimensions are as follows: for the sides, ¥4 by 6!» by 614 in.; for the top, 3% by 6% by 1754 in.; the base, Be > by 6%%4 by 181% in., and for ‘the back % by 6% by 1754 inches. The tuner circuit is very clearly illus- trated in the rear view of the tuner panel as well as in the circuit diagram, All con- position by means of two small metal brackets. The ports drilled in the panel are for the purpose of observing the bril- liancy of the filament in the detector tube. Directly below these ports the rheostat is mounted. This is an ordinary battery rheostat, made for panel mounting. The detector-tube socket, of the bayonet type, is placed on the exact center of the wooden base. The detector tube used is a soft or gas-filled tube. The B-battery is a standard 22%4-volt unit, tapped off in steps, the leads being brought out to the B-battery switch on the panel. This switch is necessary to control the voltage, as all tubes do not take the same poten-

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——— 4 4 ; POPULAR tial. The A-battery is an ordinary six- volt 40 ampere-hour auto lighting bat- tery; four dry cells may be used here, but the storage battery is recommended as it is more economical, If the builder wishes to make his own fixed or grid condenser, it may be made of two sheets of tinfoil, measuring 2 by 2 in., mounted alternately with three sheets of mica, measuring 2% by 244 in. These, however, can be pur- chased in the market for about 35 cents. The grid leak is of 2 megohms’ resistance, is of standard make, and is connected around the grid condenser as shown in the drawing. The variable condenser mounted just above the grid leak is also of standard make, arranged for panel mounting; it has 43 plates, and a ca- pacity of .001 mf. This condenser is con- nected to the binding posts marked A. A lead from the lower binding post A goes to the aerial post on the tuner unit, and that from the upper post A to the aerial proper, as shown in the circuit dia- gram. The phone jack is of the ordinary one-way type, and binding posts can be used here instead of the plug and jack, if desired. The on-and-off switch is used for cutting out the filament current when the set is not in use. The switch lever on the B-battery switch should also be kept on the off point when not using the in- strument. This circuit is also wired with No. 18 wire and all connections soldered. The B-battery can be placed on the base of the detector unit, as shown in the drawing, and the A-battery placed under- neath the operator’s table, the leads being brought up to binding posts arranged at the rear of the panel or base, as desired. The phones used are of standard make and should be of 2,000 ohms’ resistance. The aerial used with this instrument is No. 14 bare copper wire, it should be at least 75 ft. long, and should be strung up 30 ft. from the ground, insulated at each end by porcelain cleats or standard aerial insulators, and brought down to the re- ceiving instrument through a standard 100-ampere grounding switch, placed on the exterior of the building. The lead from the aerial is connected to the middle clip on the switch. The upper post marked A on the detector or panel is con- nected to the upper switch clip by No. 14 insulated wire, and the lower clip is con- nected by a lead made of No. 4 insulated wire to a 6 or 7-ft. iron rod driven into the ground on the outside of the build- ing. All connections must be carefully soldered. The No. 14 wire lead running to the instrument from the grounding switch should be led into the house MECHANICS 967 through a porcelain.tube. When installed in this manner, and the grounding-switch lever is thrown down when the set is not in use, the installation conforms to all the requirements of the fire-insurance under- writers; the aerial acts as a lightning rod, and is a protection rather than a source of danger to the building. It is advisable to place the instrument as near the aerial lead as possible. The ground lead from the instrument is connected to a near-by water pipe, steam or hot-water radiator pipe, or to a ground rod in the basement; connections to a pipe may be made by filing the pipe bright, and soldering the end of the lead to a ground clamp, which can be obtained at any electrical-supply store. It is a good plan to connect a switch between the A-battery and the detector panel, so that the battery can be cut out when not in use, as some one un- familiar with the set may forget to turn the panel switch off. To operate the set, place the phones on the head, push in the phone plug, see that all resistance is in on the rheostat, put the switches on the “on” points, and it will be noted that the filament in the tube is lit; turn the B-battery switch up to the 18'4-volt contact point, and then turn the rheostat until a hiss is heard in the phones. Turn the rheostat back until the hiss just disappears; this is the op- erating point of the tube. In some cases it is necessary to use the whole 221% volts on the tube, but this can only be deter- mined by trial. Signals, on some wave length, will now probably be heard, if so, adjust the variable condenser until they are at their loudest. The primary switch of the variocoupler is so constructed that, when turned from left to right, the instrument tunes from 150 to 400 meters. The secondary is ad- justed by means of the knob and dial on the panel. Some variometers work better when turned to the right, some when turned to the left, depending upon the characteristics of the set, so the final ad- justment of the dials on the panels will depend upon this. The dials should be so placed on the shaft that the zero points will stand at the index marks on the panel when the rotors are vertical. If one is tuning to 360 meters—the wave length of the broadcasting stations —it will probably be found that nearly all of the primary of the variocoupler will be in the circuit, and that the dials of the variometers have been turned through an are of about 80°. These adjustments take a little practice and patience, but the operator will soon find the knack. The

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968 POPULAR cost of building this instrument, as sim- ilar sets are marketed, without batteries, phones, aerial, or detector tube, is about $27.60 at current prices. The total cost, including aerial wire and_ insulators, grounding switch, batteries, phones, and MECHANICS tube, is about $45, using four dry cells for the A-battery. If a storage battery is de- sired, a good 6-volt 40 ampere-hour bat- tery can be had as low as $11. These prices are for first-class materials, which are necessary for good results, 1 piace of wood, 3 by 6% by 10 in, 1 bakelite panel, “46 by 7 by 10 in. 1 bakelite panel, 546 by 7 7 by 18 in. 1 piece of wood, % by 6% by 18% in. 1 piece of wood, 3% by 6% by 17% in. 1 piece of wood, +g by 6% by 17% in. 2 pieces of wood, % by 6% by 6% in. 1 pair phones, 2,000 ohms’ resistance. 1 variocoupler complete, knocked down, with or without windings. 2 variometers complete, knocked down, with or without windings. 2 variometer dials, reading 0 to 100. 1 variocoupler dial, reading 0 to 50. 1 V.T. socket. 1 V.T. detector tube, soft. 1 battery rheostat for filament control. 1 standard 100-ampere grounding switch. Making a “Kiddie Horse” chil- and can be [A A toy for the amusement of the dren, that costs little or nothing, that is practically indestructible, e~= PLASTER- OF AN MOULD PP ger a ; LEAD WEIGHT A Simple Toy for the Children is Pivoted on the Edge of a Mantel or Table. Once Set in Motion, ~ Figure will Continue to Rock for Several Minutes made from a piece of cardboard, some pieces of wire, and a small piece of lead. A horse’s head or other figure is painted on stiff cardboard, and then cut out, al- though a suitable picture pasted on card- board and cut out, will answer as well. The cardboard figure is balanced on the edge of a mantelpiece or table by the “legs,” or pivot, formed from wire. A somewhat longer piece of wire is bent at one end to clip over the card in the man- ner of a paper clip, and a lead weight is cast onto the opposite end, in the follow- ing manner: A cavity is made in a block of plaster of Paris, or wood, and after the MATERIAL LIST with _ .001-mf. variable condenser, complete dial (panel-mounting type). .0005-mf. grid condenser. standard 2-megohm grid leak. phone jack, one-way type, open circuit. phone plug. 15 contact points. 3 switch levers. 14 binding posts (preferably knobs). 1 22%4-volt B-battery unit, 1 6-volt A-battery, storage 6 switch stops. 15 nickelplated round-head wood screws, 1 in. ong, 4 flat-head screws, 1% in. sides of cabinet to base. No. 18 insulated copper wire for circuit. No. 14 bare copper wire for aerial. with black-rubber tapped-off type. batte ry preterrec long, for attaching end of the wire is inserted, the opening is filled with melted lead. The pivot and weight are fastened to the horse’s head in the manner illustrated. A slight push will serve to start the head wagging, and it will be several minutes before the figure comes to rest.—Adolph F. Lonk, Chicago, Illinois. A Simple Lawn Sprinkler Funds not being available for the purchase of whirling lawn sprinklers, the custodian of a public building over- came the lack by making sprinklers of his own that - were effective and practical- FLEXIBLE ly costless. A RUBBER HOSE standard of WRF wire was ~ NOZZLE made, and the nozzle end of the hose was fastened to the perpendic- ular part of - the standard. ° An 18-in. bate length of 3p. in. flexible rubber hose was wired over the end of the nozzle and the water turned on. In operation, the pressure of the water seeking escape through the nar- row aperture of the nozzle and_ hose, causes the latter to thrash about, scat- tering water in all directions. STANDARD

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POPULAR MECHANICS Restoring Typewriter Ribbons Typewriter ribbons that have been used to such an extent that they produce only a weak impression, can be given additional life by a simple method. Remove the ribbon and spool from the machine, and holding it in one hand, saturate it with alcohol or gasoline. Then pull the free end of the ribbon, while holding the spool tightly, thus causing the coils to compress and force the solvent through the ribbon. The ribbon is then placed in a warm place for about 12 hours, or until thoroughly dry.— Werner W. Baumeister, Cambridge, Massachusetts. Repairing Player-Piano Rolls At certain places on player-piano rolls the roll has a tendency to buckle or move slightly to one side, this being specially noticeable on rolls that have been used for some time. This is due to the fact that there are a large number of holes at that point or that the holes are so placed as to weaken the paper. Continued use of the rolls aggravates this condition as the paper becomes soft and warm. A good way to Pigs 20 prevent this is to paste a piece of gummed cloth on the roll, keeping as close as pos- sible to the holes without covering them. In some cases this is im possible, owing to the position of the holes. Then, a portion of the holes may be covered, taking care always to cover the back end of the open- ings, that is, the portion of the holes which is last to pass over the tracker board. The leading end of the holes should never be covered as that will cause the notes to be played slightly late, and to cover the center of the holes will cause two short notes to be played instead of a single long one. By covering the back end of the holes, the notes are merely shortened a trifle; this will not be found i } 4S GUMMED CLOTH’ objectionable, and, in fact, may even be: desirable in some cases, as the music becomes more “snappy.” The gummed cloth should be placed on the side of the paper that shows while in operation*— R. Hi. Kasper, Philadelphia, Pa. 969 A Double-Action Garden Hoe By cutting out a portion from the cen- ter of the blade of a hoe and pointing the projection on each _————— side, an ordinary hoe is converted in- to a tool that per- mits cultivating on : ~ CUT ALONG DOTTED LINE oo » ee sa pled Se" ane a se ES ofp pee fis — * A Fork-Shaped Hoe, Made from the Standard Garden Hoe, Makes It Possible to Save Time by Working on Both Sides of a Row of Seedlings at the Same Time both sides of a row of seedlings at the same time, thus minimizing the time and effort used. The blade is cut along the dotted lines, as shown in the drawing, with a cold chisel, and the rough edges are afterward smoothed down by filing or grinding. The implement is used as illustrated, and will be found quite effective for cutting small weeds and loosening up the soil around the roots of the plants.—Gregor H. Glitzke, Kansas City, Mo. Auto Mudhooks Made from Hinges Strap hinges of a familiar type can be made into very satisfactory mudhooks for the extrica- tion of a car from mud or sand. How- ever, the hinges should be of rather large size, for they must be Pent, EO shown in the drawing, so that the ends are in a line inside the wheel rim. The mudhook thus formed is clamped to the wheel by a bolt and wing- nut.

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A Bird Bath of Simple Design No garden can be considered quite complete without a bird bath of some sort, and it need not be an elabo- rate or expensive affair of concrete or stone to at- tract the birds, who are more appreciative of the water than of the container. The drawing shows a simple design for a bird bath that can be executed at min- imum expense of time and cost of material. A suit- able length of 2 by 2-in. stock is used for the upright sup- port, which is driven into the ground. An earthenware dish, such as flowerpots are set in, preferably one about 16 in. in diam- eter and about 2 in. deep, is used as a container for the water. Four horizontal arms, each 1 ft. long and 114 in. square, are fastened to the sides of the support to bear the dish. These arms are mor- tised, to make an opening into which the dish is inserted and which prevents it from being accidentally pushed off. Sim- ple brackets underneath the projecting supports can be used to add to the ap- pearance and solidity of the completed bath—Leo Rosasco, Indianapolis, Ind. Trouble Lamp Mounted on a Clothespin An arrangement by means of which an inexpensive dash lamp can be made into a convenient trouble lamp, that occupies little space in the tool box, requires nothing more than a spring clothespin. The lamp socket is fastened to the clothespin and provided with a suitable extension cord and plug. The use of the clothespin permits the lamp to be clipped to many parts of the car, and thus both hands are left free—J. G. Brown, Evans- ton, Ill. POPULAR MECHANICS Unusual Fish Bait A Pacific-coast fisherman has devised an original and successful method of catch- ing salt-water fish. A wide-mouthed, clear-glass bottle is used after the bottom has been removed. A cork, to which a pair of hooks is attached to hold the min- nows that constitute the bait, is fitted into the mouth of the bottle. Wire rings around the bottle at two places have a series of hooks attached to them, the rings being held the proper distance apart by wires which terminate in a loop over the cork; the entire bait is attached to the line with a swivel to prevent twisting. With the bottom of the bottle removed the weight is diminished when it is being pulled out, and although the bait is quite effective, due to the transparency of the glass, the fish is prevented from getting anything but a hook on the outside of the bottl.—C. C. Wagner, Redondo Beach, Calif. An Improved Tent Peg Many different ideas have been applied to making a — peg that will not pull out of the ground, but the one illus- I scsvere —_ trated has the ui %y SHEET merit of using the Wi cheap and easily obtained wooden pegs with a simple attachment that prevents them from being pulled out by accident. i A mortise is cut on one side of the peg to accommo- date a_ triangular piece of sheet iron, pivoted to swing freely. The pegs are driven in the usual manner, but when any undue strain comes on the tent ropes, the sheet-iron piece assumes the position indicated by the dotted lines and locks it as securely as the character of the soil will permit. Cooling Breezes from the Vacuum Cleaner The ordinary suction cleaner can be used to cool the temperature of a room without alteration of any sort. Simply place the cleaner over one of the hot-air registers and remove the dust bag. Be sure that the fresh-air intake pipe from

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POPULAR the outside of the furnace is open. If there are no furnace registers, the same effect can be obtained by setting the cleaner near a door or window. In either case see that the nozzle of the machine is raised slightly from the floor so as to allow free suction of air. When the cur- rent is turned on, a strong blast of air will be delivered through the dust-bag opening.—Chas. J. LeCompte, St. Louis, Missouri. Repairing Gun Locks After a double-barreled shotgun has been used for a long time, trouble is often experienced in keeping the hammers cocked — they occasionally snap off ap- parently with- out cause, and make the use of the gun ex- ceedingly dan- gerous. This trouble is caused by the wearing of the point of the trigger latch, as shown in the drawing. An accumulation of dirt in the notch of the hammer disk will also prevent the latch from getting a good hold. The remedy for both troubles is simple. Remove the side plate of the gun, take off the trigger latch, and with a fine file bevel off the end of the latch, re- moving as little metal as possible. After cleaning out the notch in the disk and giving it a light coat of vaseline, the lock is reassembled. SHARP POINT Preventing Use of Hose Faucet Many persons try to prevent meddling with hose faucets by removing the little T-head keys by which they are turned. This kink almost always results in the stem of the faucet being rounded off by the application of pliers and other tools. A more effective preventive, and one that is free from this drawback, is the application of a %4-in. pipe cap over the threaded end. The cap can easily be screwed on with a pair of pliers, or even by hand, to prevent the meddling of chil- dren. This is also an excellent method of stopping dripping faucets until new washers can be fitted—Doncaster G. Humm, Phoenix, Ariz. MECHANICS 971 Bedstead Shelf for the Sick Room The days in a sick room are monot- onous and soon make the patient nervous and fretful; a note of cheerfulness and variety, however, may be introduced by making a shelf to hook over the foot of the bed, on which fresh flowers, pictures, or other articles can be placed, The same shelf can be used with any style of bedstead, whether of wood or metal. Two iron hooks and a narrow board are the only parts required. Articles suggestive of the patient’s con- dition, such as medicine bottles and the like, should not be placed on this shelf, but kept out of sight as much as pos- sible-—Robert H. Neill, Ottawa, Ohio. A Simple Seeder When dropping seed in the corn hills, or planting the pumpkin or the melon patch, the stooping that is neces- sary in order to drop the seeds in the proper place makes the job somewhat fatiguing. So, to make such work easier as well as simpler, the seeder in the drawing was devised. A piece of thin tubing, about %%4 in. in diameter and 4 ft. long, was split at each end for several inches, 4 q and the split “® Aye portions flattened out; one end was bent around a piece of an old broom handle; the opposite end was sharpened, and about 3 in. from the point, a short piece of light angle iron was riveted to the back to serve as a foot step for forcing the tool into the earth. As this step is in a fixed position, the seeds can be planted to a uniform depth. To operate this seeder, it is forced into the ground, and the seeds are dropped through the opening at the top and fall into the cavity made by pushing the too) forward. By placing the foot in front of the blade, as it is withdrawn from the earth, the seeds are held and covered. —— HANDLE — SEED INLET RIVETS ANGLE IRON ee eee

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972 POPULAR Permanent Screen-Door Fastenings The necessity of using larger screws or plugging worn screw holes every year, when the screen doors are put up, can be ' overcome by ho \* \ = SOLDERED idea illus- trated. A small iron plate is fas- tened to the door frame with four screws; this is a permanent fixture. Be- fore fastening the plate in position, holes are drilled through it which coincide with those of the hinge. On the reverse side of the plate, and exactly over the holes, nuts are soldered. Flat-head screws are then run through the holes in the hinge of the screen door to take the place of the ordinary wood screws. The wood underneath the nuts is countersunk with a drill so that the plate will come flush with the door frame. VIEW OF PLATE Faucet Guard for Dishwashing Part of a rubber ball was used by a householder to prevent dishes from be- ing nicked and broken by contact with the faucet, while washing them in the sink. The ball was cut in two, anda ADHESIVE TAPE = hole, a little SECTION OF a smaller than RUSSER GALL ‘J the diameter — of the faucet spout, cut in the cup thus formed. The cup was then forced over the faucet in the manner shown, and held in place by adhesive tape —Truman R. Hart, Ashtabula, Ohio. Swimming under Water The following instructions, when care- fully followed, will enable any normal person, who can swim, practically to double the length of time he can remain under the water. The usual method of nearly all swimmers is to take the deepest adopting the. MECHANICS breath possible before plunging; they generally swim in a haphazard way, and come to the top just as soon as they think they are getting out of breath. To break one’s own record, one should observe the following rules: First, take several deep breaths, and then blow every particle of air out of the lungs, instantly draw in a full, deep breath, and then dive, going down deeper than usual; second, take regular strokes, about one a second, and always try to go one stroke farther than in the last dive. By counting the number of strokes taken under the water, the swimmer’s confidence is wonderfully increased, and he also is able accurately to judge his location at all times. The ability of a person to remain under water can be tested on land by practicing the above method and timing himself with a watch. This is the method used by most professional swimmers.—Carroll Pfleegor, Milton, Pa. Rubber Stopper Used as Spring A small punch, used for punching holes in the leaves of a loose-leaf ledger, was repaired in a simple manner when the spring that returned the plunger became broken. In order to make the punch serv- iceable until a new spring could be ob- tained, a rubber stop- per was used. A hole, a little larger in diam- eter than the punch, was drilled through the center of the stop- per and the latter inserted into the tool opening in place of the spring. Then, after a washer had been placed under- neath the head of the punch, it was inserted through the hole in the stopper. When the plunger was forced down, it was automatically restored to position as soon as the pressure had been released.— Dale R. Van Horn, College View, Neb. Drying Yellow Poplar Yellow poplar lumber, fresh from the saw, can be dried quickly and the danger of staining reduced to a minimum by pil- ing the boards on end. The object of this is to permit the moisture to drain off freely and improve the circulation of air around the boards. Lumber dried in this manner will be bright and clean, and can be shipped after a few weeks.

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POPULAR Planting Corn It is much better to plant four rows of sweet corn 5 ft. long side by side than it is to plant one row 20 ft. long with as many plants. The former method will produce more and better corn than the latter, be- cause there will be a better distribution of the fertilizing pollen, as, the rows being closer together, the wind will carry it between the rows. In a long single row, the greater portion of the pollen will be blown away without falling upon the silk to fertilize it and produce the corn. Each silk fertilized means more kernels of corn on the cob, and failure of proper fertili- zation causes bare spots upon them. Guard Prevents Dulling of Hoe Gardeners, amateur and _ professional, often damage or ruin the edge of their nicely sharpened hoe by striking a con- cealed rock. In order to prevent this, at least to a great extent, the guard illustrated may be used with good ef- fect. It con- sists simply of three narrow blades, at- tached to the face of the hoe, with the points extend- ing about % in. beyond the edge of the implement. The blades are made of stock heavier than the hoe, and the end and faces are sharp- ened. If large stones are encountered, the points of the blades take the bump, and even though they become dull, they do not prevent the hoe from entering the ground easily. To make a smooth job, the blades should be welded to the hoe. Skate Aids in Moving Furniture Having occasion to move a heavy dis- play table from one end of the store to the other, a distance of about 70 ft., with- out help, I placed a roller skate under each of the legs at one end, and thus rolled the table along to its new position easily.—H. B. Nissly, Sioux Falls, S. D. MECHANICS 973 A Carrier for Cork Auto Gaskets The flimsy cork gaskets used under- neath the various cover plates and about practically every detach- able part of an automobile engine, are difficult to handle with- out breaking, which makes them practi- cally unfit for use. To mini- mize the dan- ger of break- age, and con- sequent loss, a_ serviceable but simple carrier can be made that not only protects the gaskets but keeps them always visible, so that the mechanic can select any one of them without delay. This carrier is made from the back curtain of an old automobile top, containing a square or rectangular celluloid light. The material is sewed over the light to form an envelope, into which one or more sets of the gaskets can be placed, and as the carrier can be dropped and otherwise mishandled with small risk of damage to its contents, th: saving will rapidly pay for the trouble involved in making it. Key Guide for the Back Door By means of the key guide shown in the drawing, one can locate the keyhole in the darkest night as easily as during the day. The entire device is made from sheet metal. Four strips, each about 1 in. wide, are formed _ into a flared frame = and soldered over |/ a square opening cut out of a flat strip of the same material; this should be a trifle wider than the guide proper. In use, the attach- ment is fastened to the door with two screws, so that the keyhole comes in the center of the square hole. As the key is inserted into the guide, the tapering sides cause it to be directed toward the keyhole.

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POPULAR Cutting Sod around Trees To cut the sod from around the trunks of trees, and at the same time form a cir- cle, is a little more difficult than is generally realized. However, by the method shown in the drawing it is possible to de- scribe a circle and cut the sod at the same time. A loop of rope is tied around the tree and the spade is inserted into the opposite end. A circle of any de- sired diameter may be obtained by increasing or dimin- ishing the radius, represented by the length of the loop of rope.—Doris John- son, Rockford, III. A Strong Mower Handle In the rare cases that the handle of a lawn mower becomes broken, another, as strong and serviceable as the original, can easily be made from a strip of oak of the same dimensions. The new handle is split down its center for about 14 in. at one end, and a 14-in. bolt is inserted into a drilled hole about an inch be- low the bottom of the cut, and tightened, to prevent the piece from splitting. The split end is then steamed and the outer ends bent about 4 in. apart. A tenon on each of the bent parts is fitted into a corresponding mortise in the han- dle, which is made from a 14-in. piece of the same stock as the handle. An Auto-Theft Alarm State laws and municipal ordinances, in most cases, make it practically impos- sible to lock an automobile so that it is immovable, by chaining the wheels or locking the brakes. However, the use of alarms is not prohibited, and it is con- sequently possible to wire the horn of the car in such a manner that it will MECHANICS begin to blow as soon as the engine is started, and continue to do so as long as it is operating. This is accomplished by mounting a concealed switch under- neath the cowl, which must be opened when the engine is started, and running a wire from the generator to the horn; this does not interfere with the usual operation of the horn from the button on the steering wheel. Consequently, with the engine stopped and the switch closed, the horn will commence to blow as soon as the generator begins to operate. Simple Mounting for Small Motor When using a small electric-battery motor for different experiments in the amateur’s lab- oratory, it is generally found that the units, when con- nected in the usual manner, are awkward to move about. To combine the | Fleto con- two, the mo- — n tor is mount- pane A DING DV U ¢ ed on the top POSTS — of the dry cell by means of two steel, brass, or copper strips, attached to the underside of the motor base, bent as shown, and clamped to the binding posts of the battery. A switch of the type illustrated, or of any other type desired, is connected to the binding posts on the base of the motor, so that the latter can be started and stopped as desired—W. A. Saul, Cam- bridge, Mass. The F-Numbers of Lenses The F-numbers of photographic lenses, such as F/7.5 and F/6.3, etc., indicate the working aperture of the lens at which good definition is to be had, and hence the speed of the lens. The numbers themselves indicate the quotient resulting from division of the focal length by the diameter of the largest diaphragm open- ing. Thus, F/7.5 means that the diam- eter of the diaphragm opening is con- tained in the focal length 7.5 times; also, it may be seen that the smaller the num- ber of any particular lens the larger the corresponding working aperture and the shorter the necessary exposure.

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A Small Electrically By A. N. GREAT many amateur mechanics have frequent need of some appara- tus that will supply steam under light pressure for the operation of model en- gines, turbines, and such incidental work as opening storage batteries; and it is for just such purposes that the electrically heated boiler shown in the drawing was designed. First, an earthenware bottle, or jug, of the size required is obtained; this is cut off about 31% in. from the base, the opera- tion being easiest performed on an emery grinder. Two pieces of hard carbon are required, which are drilled and formed to the dimensions shown in the drawing, the bottom of the larger piece being cut away, CHIMNEY ~_ SMALL SAFETY VALVE CAN BE PLACED HERE VENT FOR FILLING WITH WATER CAN BE FITTED WITH PRESSURE GAUGE —— VALVE CLEARANCE HOLES ff , STEAM OUTLET t ' } CUT AWAY 2 FOR WATER oF I CIRCULATION | Y oO Heated Steam Boiler CAPRON the studs must be drilled through the bot- tom. This is accomplished by first ae ping off the glaze and drilling the hole with a twist drill kept moistened with turpentine, The holes having been drilled, a boiler is made from sheet brass, cop per, or iron to correspond with the dimensions of the earthenware jar, as shown in the drawing, with a horizontal support for the jar to rest upon. This latter piece, which forms the top of the fire box, is drilled to give ample clearance for the studs and should be free from contact with them, as indicated. To prevent any possibility of the water or steam working its way between the earthenware jar and the boiler shell and BOTTOM VIEW FOR STUDS, EARTHENWARE i Phe fis 1 ~ STUDS SCREWED | INTO CARBON ~ JAR, 3” DIAMETER ~! , i] A i lin e AB CARBON CYLINDER CENTER CARBON WATER LINE —~_ BRASS OR COPPER BOILER ~ “4 { Li bi-1- SMALL 110-VOLT LAMP STAINED ORANGE ee INSULATING BUSHING % \ TO 110-VOLT \ES UNE BY —. = An Electrically Heated Steam || 1- FIBER - ~% THICK 1 -SOFT RUBBER- Vig THICK _- IRON WASHERS | — HEXAGON NUTS FRAGMENTS OF REO i} AND ORANGE GLASS 1 MOUNTED ON SHEET MICA WITH GLUE OR CEMENT ~ SLATE Generator for the Amateur Mechanic’s Laboratory Which will Supply Sufficient | i] i) \ fe FRONT VIEW OF LOWER SECTION OF BOILER BASE Steam for the Operation of Experimental Engines, without Fire Danger as indicated, to permit free circulation of water around and through the heating element. Both carbon pieces are drilled to take brass studs which may be made by threading short lengths of %2-in. brass rod; these are screwed into the holes drilled for them, or they may be held by means of small metal pins. The carbon heating elements are to be assembled together in the bottom of the earthenware cup so that there is Me in. between them, and holes to accommodate out at the bottom, the seam should be silver-soldered, after the shell has been riveted in place, although brazing would be better. The heating element is then placed in position and insulated from the metal boiler with fiber disks, as indicated, a similar disk of soft rubber being used to prevent escape of steam or water. The top of the boiler is equipped with a steam valve, and the other necessary fittings, in- cluding a vent for filling the boiler, are brazed or riveted to the boiler shell. It 975

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976 will be impossible to rivet this piece in place unless it is concaved or “dished,” with a flange around the edge for the rivets. To simulate the appearance of fire underneath the boiler a colored miniature lamp may be mounted in the fire box as indicated, or by placing the light behind a fire door that has openings covered with red and orange glass. The efficiency of such a boiler is quite POPULAR MECHANICS high; the water enters through the four open spaces in the bottom of the outer carbon and is heated as it ascends through the annular opening of the heating ele- ment. The water is heated to the boiling point by its own resistance to the passage of current through it. The fire danger that attends the usual alcohol lamp is eliminated, and if the boiler goes dry, the current is automatically shut off,

Brush Hook Made from a Shovel The brush hook shown in the drawing. has been successfully used for cutting away brush, in clearing land along fence

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A Brush Hook Made from a Round-Nose Shovel That for Many Purposes Is Superior to the Ordinary Hook lines, and similar work; it is made from a shovel of the round-nose type. The blade is cut away along the dotted lines, and the resulting sickle is sharpened. For many purposes a hook of this character will be found superior to the ordinary brush hook, as a better blow can be struck and the sickle-shaped blade makes it pos- sible to handle several small shoots at the same time.—G. P. Melrose, Kamloops, B. C., Can.

Emergency Axle Repair An automobile tourist saved the trouble and expense of being towed to the nearest garage, when one of the rear hubs of his machine became broken. He removed the hub from the wheel so that the end of the axle shaft was exposed. A pipe wrench was put on so as to grip the shaft, and the handle was tied to one of the spokes in the wheel, thus holding the wheel on and causing it to revolve with the axle.— S. S. Spence, Kearney, Neb. Repairing Eaves Troughs Holes that are rusted through the eaves troughs of a building can be mended in a simple manner with ordinary cement, sand, and a little wire screen. A piece of the screen, a little larger than the hole to be cemented, is placed inside the trough to serve as a bond and reinforcement. This is coated with concrete made from equal parts of Portland cement and sand. This idea has also been applied to mend- ing the chipped corners of greenhouse windows, in positions where the holes were difficult to reach from the outside, and the repair was found to be much better than putty; the rich concrete made a perfectly water-tight joint between the glass and the wood, which was thoroughly wetted before applying the concrete.—Ansley Hitz, Chicago, Ill.

Pulling Screen Wire Taut Having to renew the screening on several large porch screens, I was at a loss to de- termine how the new screen wire could be drawn taut across the frames. In looking through the tool box,I found an old carpet stretcher which was tried out and found to answer the purpose in an ideal manner. To use the stretcher, the screen is fas- tened along one edge of the frame and the carpet stretcher inserted in the mesh on the opposite edge, drawing the screen wire taut. The stretcher was found to be particularly effective on the large frames, where it would have been practically im- possible to stretch the wire evenly by any other method.— Harry G. Schultz, Tea- neck, N. J.

CARPET STRETCHER

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POPULAR MECHANICS Trapping Rodents without Bait By setting a spring rat or mousetrap in the usual manner, and placing it so that its trigger end will butt against the wall, it will be found that the animals may be caught without bait. The reason for this is that they usually run along the wall, and across the trap, and as soon as they strike the trigger, the trap is sprung. This method is particularly applicable in a room where there is so much other food that bait would not entice the rodents.—Thos. A. Dickinson, Youngs- town, Ohio. Rustic Flower Vases A simple and effective flower container for the summer cottage or porch is made from a short length of a tree branch. The bark gives a rustic appearance to the vase, and a variety of effects are ob- tainable by judi- cious selection, the white bark of the birch being the most conspicuous. The container may be made of any diameter by using a section of the desired size, from which the interior has been gouged or drilled out. A “liner,” which is what florists call a container for water in such vases, may be provided by inserting a can, or other receptacle, into the hollow center. Washers for Garden-Hose Connections Having to use several lengths of gar- den hose connected together, it was found that much of the pressure at the nozzle was lost because the water escaped through the washerless connections. Look- ing about for something from which to make washers, it was found that the cork lining of the ordinary crown bottle cap just fitted into the usual hose coupling. The cork centers were removed from the caps, placed in the hose couplings, and the centers trimmed out with a sharp penknife. When connected together again, with the washers in the connections, leak- ing at the joints was entirely overcome.— C. E. Diehl, Mammoth, Utah. ~ -2 Improvised Developing Tray When a plate or two must be developed in a hurry, away from the dark room and its conveniences, a tray that will be suffi- SHEET CUT TO SIZE 22. OPERATION COMPLETED TRAY When the Photographer Is Away from the Dark Room He can Develop His Plates in an Emergency Tray Made from a Sheet of Stout Paper, Waterproofing It with Paraffin ciently satisfactory for emergency pur- poses can be made in a few minutes from a sheet of stiff paper. The sheet of paper to be used is meas- ured so as to be 1 in. wider at the sides and 2 in. longer at each end than the plate. For example, if the tray is to hold a 5 by 7-in. plate, the paper should be not less than 7 by 11 in. Fold up the sides and ends as illustrated in the first opera- tion. The second operation consists in turning the projecting ears back, and the third, turning the ends down to com- plete the tray. If convenient, the tray should be dipped in melted paraffin and allowed to cool, or a lump of the wax can be placed in the bottom of the tray and melted by gently heating over a stove or lamp. Do not use denatured alcohol or similar solvents in the waxed tray, as it will dissolve the paraffin and create trouble.—John H. Curtis, Philadelphia, Pa. Sanitary Poultry-House Floor The owner of a flock of chickens, on moving from one house to another, found that a piece of linoleum would not fit any of the rooms in the new home. This was trimmed to the dimensions of the chicken house and laid on the floor, producing a smooth, even surface and stopping up the numerous cracks in the board floor. The floor is kept covered with several inches of litter, and the linoleum has been found to make a durable, sanitary, and draft-proof floor—Paul H. Reuss, Kalamazoo, Mich.

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978 POPULAR Boat Rudder for Shoal Water In fitting a small rowboat with a sail, a removable rudder was desired, but, as this boat was to be used in shallow and SPRING - HINGE. A Rudder for Use in Shallow and Weedy Waters That Swings Out of the Way When an Obstruction is En- countered: Two Ordinary Clamps are Used to Hold the Device to the Seaneomn of the Boat weedy water, the rudder as well as the leeboards had to be fitted so as to swing out of the way when an obstruction was encountered; this was accomplished. in the manner illustrated. The rudder blade, made of sheet metal, is riveted in a slot cut in the end of a 14-in. iron rod, the upper end of which is threaded and fitted with a tiller made of iron pipe. A piece of wood, about half as long as the 14-in. rod, is fastened at right angles to a small block, and the two joined to a third piece by means of a stout butt hinge, as shown, a piece of spring steel about 8 in. long being screwed underneath the hinge leaf fastened to the horizontal strip. The other end of the spring slides on the vertical stick, between guides formed by driving in a round-head screw on each side. The rudder is strapped to the vertical wooden member so as to swing freely, and prevented from dropping by a machine screw bearing against one of the straps; the horizontal member is fastened to the stern of the boat by means of two iron clamps as in the drawing. A rudder of this type swings back when it strikes an obstruction, and as soon as this has been passed, the spring pulls the rudder back into place—Walter E. Bur- ton, Kenmore, Ohio. @ Silver-white or white lead, with yellow lake or Dutch pink, and a little lemon- chrome yellow, will give a very rich shade of olive-drab or amber color. MECHANICS Filing Papers in Binders Where office records were kept in post binders, it had been customary to indi- cate the contents by a label pasted on the top cover. Binders were then stored on shelves in stacks or rows, in which posi- tions the labels were concealed, and con- siderable time was lost in locating the particular volume wanted. The only other space available for a label or an inscription was the bound end, which was too rough for writing or pasting. The uneven edges were cut down to an even surface with coarse sandpaper, followed by No. 0 sandpaper, the surface thus pro- duced making it possible to write the title of the contents on it with a broad shad- ing pen and ordinary ink. Under this plan, it became as easy to select any binder as to select a book by its title— Waldemar Landry, Sr., Baton Rouge, La. Screening Center-Pivoted Windows One of the most perplexing problems, to many, is to put fly screens over a win- dow that is pivoted at the center instead of sliding. The difficulty may be over- come in the manner illus- trated. The screen is made in two sec- tions, each half the width of the win- dow. One sec- tion is placed on the outside and the other on the inside, as shown, and a strip of felt or rubber, cut from an old inner tube, is tacked to the screen frames in such a manner that they will always bear against the window and close the opening.—J. R. Linton, Sioux City, Ia. Indoor Trellis Made from Chain An attractive trellis for a climbing asparagus fern can be made of brass pic- ture chain. A chain is fastened to each side of the wooden pail in which the plant is growing, by a small hook, the other ends of the chains being looped over the curtain rod at the top of the window. Crosspieces of the chain are used to form a ladder effect—Jo Walker Humphrey, Kirksville, Mo.

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PRIZE OF $1,000 OFFERED FOR A POEM ON “SPIRIT OF TRANSPORTATION” To inspire workers in the office or in the machine shop of the automotive industry with a consciousness of the unseen romance connected with their hum- drum work, last year 12 paintings, by different artists, visualizing “The Spirit of Transportation,’’ were entered in a contest for a prize of $1,000, offered by the Clark Equipment Company of Buchanan, Mich. This year the same company is offering the same amount for the best poem on the same subject. The theme of the poem must show the influence of the motor car and truck upon civilization, and it will bear the same title as the pictures: “The Spirit of Transportation.’ Ihe conditions are: All poems must be typewritten on one side of the paper and must be original. Poems may refer to the paintings, or may be confined to the reneral theme. Poems submitted must be accom- panied by an assignment of copyright, and if postage is inclosed will be returned at the close of the con- test. The prize will be awarded by a board of judges, and their decision will be final. The competition closes June 30, 1922. For full details and registra- tion blank, address Clark Equipment Company, Bu- chanan, Mich. ANNOUNCEMENT OF THE FOURTH ANNUAL RACES AT PIKES PEAK, COLORADO Autoists will be interested in the announcement that the fourth annual Pikes Peak hill-climbing races, the biggest competition of the kind in the United States, will be held this year September 4. The Pikes Peak is the highest automobile highway in the world, and these races are the most spectacular contests of the racing season. To the car making the best time, regardless of class or event in which it is entered, is iwarded the Penrose Trophy, in addition to the cash- prize money. The cash prizes total $2,100. The courss 12 miles 2,200 ft. in length, and cars can run breast or pass each other with safety. There are three events; for A. A. A., class-C cars with piston lisplacement of 183 cu. in. or less; for the same class ars with piston displacement of 183 to 300 cu. in ind for A, A. A., class-D cars with a piston dis placement of over 300 cu. in. Address: The Cham- ber of Commerce, Colorado Springs, Colo. ’ Sn — —EE — 7 These parks, when well developed, produce revenue, stimulate travel to and through the state, preserve the beautiful native scenery and historic spots, and are in every way of benefit to the state. One of the features of these parks undoubtedly will be the establishment of free public camps, which have been so popular in the national parks. Two days of the conference will be devoted to business sessions, while the remainder of the time will be utilized by trips of inspection through the Palisades Interstate Park, West Point, a new state highway around Storm King, the New York Zoélogical Park, and the Bronx River Parkway. This will give the delegates an excellent opportunity to se« the splendid state-park development in that part of the country. INDIANA LITTLE THEATER SOCIETY OFFERS PRIZES FOR FOUR PLAYS The Little Theater Society of Indiana offers prizes amounting to $100 for four plays, and also a pro duction by the Little Theater of the plays selected, and their publication in book form. Plays submitted must be original and unproduced works by residents of Indiana. In form, length, and construction they must be of the one-act type. No author may submit more than four plays. Preference will be given to plays dealing with present-day life and local condi tions. Besides the prize money, the authors of the plays selected will receive one-half of all royalties lerived from their subsequent use, and from their pub lication. All plays must be typewritten, and must be mailed before June 1, 1922, to Mrs. William O. Bates, President of the Little Theater Soc iety, 756 Middl Drive, Woodruff Place, Indianapolis, Ind., from whom further particulars may be obtained NATIONAL FOREIGN-TRADE CONVENTION WILL INCREASE AMERICAN EXPORTS In connection with the ninth National Foreign Trade Convention, held at a hia, Pa., early in May, a series of nine brief articles on “The ABC of Foreign Trade” was widely circulated The object was to pomt out how closely related is prosperity in the United States to the volume of its foreign trad ] The main theme of the convention was financing and a Ta expanding foreign trade It was shown that domesti onsumption alone cannot dispose of the full produc HIGHLY EFFICIENT MUSICAL SERVICE tion of Amet gp get ind that tl ¢ surplus - _> REGARDED AS CIVIC ACHIEVEMENT pe ee a oe ee ee By the terms of the Edward Bok award, $10,000, sides that, there are certain raw materials of whi with a gold medal, is given annually to the person the surplus is very much greatet It is ¢ timated vho has been judged to have performed the most that nearly 50 per cent of the cotton and ! lly 25 noteworthy civic achievement for Philadelphia The per cent of the wheat produced in this country have first bestowal of the award, this year, was for a form find a foreign market, and it is obvious how muc!l of service that is not commonly associated with the the southern states in the ne case, and the norther idea of civic achievement It was given to Dr. Le states in the other, must be affected by the failure t pold Stokowski, conductor of the supremely fine find a market for any portion of this great sury orchestra that has made Philadelphia famous through It should be realized that the difference between good out the musical world. He has done other work of times and bad times in the United States is the dif value to the community, pz irticularly in making music ference between imple reign markets and a lack available to people of modest means and small oppor f them tunity. He has, on his own account, offered an annual prize to meritorious local musicians. He has, wherever possible, coéperated with local artists and musicians, nd with the public-school authorities in the encour gement of music. Thus, it is evident that his worl was appropriately characterized as civic achievement THE SECOND NATIONAL CONFERENCE IN INTERESTS OF STATE PARKS The second national conference on state parks, which 1as been called in the interests of state-park develop 1 } EXAMINATIONS IN THE AIR SERVICE TO APPOINT FLYING CADETS Examinations are now being ld in the air servi for the appointment of flying « et Both enl | men and civilians are eligible At the time of ageli cation, candidates must be unmarried male tizer vetween the ages of 20 and 27 years. They must b« high-school graduates, or possess an equivalent ed cation. They must be of excellent character, and ound in physique ment by John B. Payne, chairman of the conference, The base pay of flying cadets is $75 a month, wit! will be held at the Bear Mountain Inn, Palisades a ration allowance not exceeding $1 a day. Other Interstate Park, New York, May 22-25, 1922. The allowances, such as clothing and equipment, are the first national conference was held in Des Moines, Ia., same as those of a private in the air service in January, 1921, and since that time a great deal has term of enlistment is three years, but may be short been done in this work. The importance of a national ened by an earlier successful completi of the development of state parks cannot be overemphasized prescribed course, when the cadets will be commi

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O80 POPULAR sioned second lieutenants in the Air Service Officers’ Keserve Corps. Examining boards are located at the various flying stations in the United States and its dependencies, and applicants from civil life will be required to pay all ex- penses incident to their appearance before the boards. The next class for cadets in airplane service is scheduled to commence about July 1, and for balloon and airship service about September 25, this year. Other information and application blanks can be ob- tained by addressing the War Department, Office of the Chief of Air Service, Washington, D. C. TRIENNIAL COMPETITION FOR PRIZE FOR BEST WORK ON ELECTRICITY The triennial contest for the prize known as the George Montefiore Foundation, which was won last year by Dr. J. B. Whitehead, of the Johns Hopkins University, is again announced by the Association des Ingénieurs Electriciens Sortis de Il’Institut Electro- technique Montefiore, of which L. Calmeau, Rue Saint- Gilles 51, Liége, Belgium, is general secretary. This prize, amounting to 21,000 francs (normally $4,200), 1s awarded for the best original work in French or English upon the scientific advance of electricity and its technical applications. Though known as the com- petition of 1920, the next award will be made in 1923, and works may be submitted up to April 30 of that year. PRIZE OF $100 FOR THE BEST POEM BY ANY COLLEGE UNDERGRADUATE Through the Poetry Association of America, Witter Bynner, its president, offers a prize of $100 for the best poem, or group of poems, not exceeding 200 lines in length, written by an undergraduate of any col- lege or university in the United States. No limit is placed upon the number of entries by any one person, and previous publication does not disqualify. On each page of the manuscript must be written the name and address of the contestant, and the mark “P. S. Contest.”” The contest closes May 15, 1922. Poems should be addressed to Haniel Long, 5559 Beeler Street, East End, Pittsburgh, Pa. PRIZE-ESSAY CONTESTS TO ENCOURAGE TEMPERANCE STUDY IN SCHOOLS Temperance study in the public schools is being encouraged through the National W. C. T. U. by the offer of prizes for essays on the subject. The essay writing forms a part of the class work in the schools, which is promoted by a local superintendent, in each state, of the Scientific Temperance Department of the National W. C. T. U. A leaflet is issued containing a full list of the subjects and rules for the prize- essay contests, which can be obtained by addressing either the state superintendent or the Department of a Instruction, National W. C. U., Evans- ton, Ill. TWO PRIZES OFFERED FOR THE BEST HUMAN SPINES IN NORTH AMERICA For the two best human spines in North America, cash prizes to the amount of $1,500 are offered by the National League for the Prevention of Spinal Curva- ture, an osteopathic organization. Women over 18 years of age may compete for a prize of $1,000, and girls or boys under 12 years for one of $500. The contestants for the prizes must be examined in each instance by a graduate of osteopathy, who has re- ceived his degree from one of the associated colleges under the American Osteopathic Association. The contest closes May 25, 1922, and the prizes will be awarded June 15. Address, Dr. Nathaniel W. Boyd, 126 East Washington Lane, Germantown, Philadelphia, Pennsylvania. MECHANICS FOR BEST NAME FOR RECKLESS DRIVERS CASH PRIZE OF $25 IS OFFERED It is desired to find an appropriate name, or epithet, to apply to the motor driver who disregards the traffic signal, drives on the wrong side of the street, tries to “shave” another vehicle too closely, and who through his carelessness and recklessness endangers the lives of all, but particularly of children. For the best name denouncing an offender of this kind, a cash prize of $25 will be paid by the American Automobile Associa tion. The name must be submitted not later than May 15, 1922, and the prize will be awarded May 29. Address, A. Association, 1108 Sixteenth Street, N. W., Washington, D. C PRIZES FOR BEST SYSTEM OF MANAGE- MENT OF HOUSEHOLD EXPENSES _ To encourage economy and good accounting methods in the management of the household, which is best done by the adoption of a budget system, as fully explained in a little volume entitled, “‘Menter Plan of Home Budget,” the publishers offer $5,000 in cash prizes. For the most complete budget record on the Menter plan for a period of at least six months, end- ing Dec. 31, 1922, a first prize of $500 is offered. Besides this, $4,500 will be distributed in $25 awards to 180 of the best records sent in. Address, The Menter Company, 467A Seventh Ave., New York City, @ For the best lists of household uses of a cleansing cream, called “‘Sanlo,”’ the manufacturers offer a first prize of $50; a second of $25; a third of $10, and three others of $5 each. The prizes will be awarded by the officers of the company and its advertising department. The contest closes Aug. 31, 1922. Ad- dress, Contest Department, The Parker Sanlo Co., Inc., Rochester, New York. CONTESTS PREVIOUSLY ANNOUNCED Medals, Diplomas, and Money Awards: Announced August issue, 1921; awards offered by the Franklin Institute. For Service to City of Philadelphia: Prize $10,000; announced September issue, 1921; awarded each year by Edward Bok, former editor of The Ladies’ Home Journal. One Million Francs for Best Motor: Announced January issue, 1922; closes June 1, 1923; address, Aero Club of France, Paris. Best Slogan Describing Razor: Prize $500; an- nounced January issue, 1922; closes June 30; address, Durham Duplex Razor Co., 190 Baldwin Ave., Jersey City, N. J American-History Essays: Prizes, $3,000 for pro- fessors, $2,000 for specialists, $1,000 for school-teachers, $1,000 for students, and $500 for undergraduates in U. S. colleges; announced March issue, 1922; closes May 31. Address, Knights of Columbus Historical Commission, K. of C. Bldg., 199 Massachusetts Ave., Boston, Mass. Best Setting of a Song: Prize $100; announced April issue, 1922; closes July 1; address, D. A. Clip- pinger, 617-18 Kimball Building, Chicago, II. Man-Propelled Airplane: Prize 20,000 francs; an nounced April issue, 1922; closes September 13; ad- dress, Maison Peugeot, 80 Rue Danton, Levallois Perret (Seine), France. Posters to Incite Kindness to Animals: Prizes, $25, $15, and $10 for each of eight groups; announcea May issue, 1922; closes May 20; address, Poster Ds partment, American Humane Association, Humane Society Bldg., Albany, N. Y Essays to Incite Kindness to Animals: Prizes, $25, $15, and $10; announced May issue, 1922; close May 20; address, Essay Contest Department, Ameri can Humane Association, Humane Society Bldg., Al bany, N. Y. IN accordance with the editorial policy of this magazine never to accept compensation in any form for what appears in our reading pages, and also to avoid all appearance of doing so, we are obliged to omit the name of the maker or the seller of any article described. This information, however, is kept on file and will be furnished free, by addressing Bureau of Information, Popular Mechanics Magazine, Chicago. [Editor.] TE LL sre

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POPULAR MECHANICS ADVERTISING SECTION 1 Victrola homes are happiest | The Victrola is the one instrument that | presents in the home the best music of every | kind and description in the tones of actual | reality. The genius, the power, the beauty of every voice and every instrument—the diverse gifts possessed by the foremost artists of this | generation. Their Victor Records played on | the Victrola—a combination that is essential to perfect results — duplicate in the home the public triumphs of these great artists. Victrolas in great variety—$25 to $1500. Lag Victrola “HIS MASTER'S VOICE” REG. U.S. PAT. OFF 5 | Important: Look for these trade-marks. Under the lid. On the label. | Victor Talking Machine Company Camden, New Jersey

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- POPULAR MECHANICS ADVERTISING SECTION FOR USES WHICH INVITE DECAY, YOU SHOULD SPECIFY, AND INSIST ON “ALL-HEART” WOOD. IT WILLPAY YOU. NEW Buy your Cypress by the Cypress Arrow, Sin Ss e€ —— Ul — ‘Vhade Mase Ree US Pn Orme Look for this on every board or bundle of fered as Cypress. It identifies the TIDE- WATER product, the true ‘‘Wood Eternal,** AND SPECIFY “ALL-HEART” — The Cypress “Pergola-Garage” Why should a garage be homely? This one isn’t.— (Is it?) The man driving out is the owner. He is well satisfied with the fact that he has en- hanced the beauty of his grounds at the same time that he has protected his car. The picture shows how your garage may look if you will allow us to send you, with our compliments, and with no obligation at all, the Complete Working Drawings'(on sheet 24 x 36 inches) including full specifications—enough for any good carpenter to build from. Perhaps you enjoy such work yourself. If so, you can’t go wrong. It might even be possible to remodel your present garage on these lines. If you do so, of course you will know what kind of lumber to buy. ‘‘If you build of Cypress you build but once.’® You know *‘the Wood Eternal’® is the champion pergola lumber—does not tend to shrink, swell or warp like so many woods—takes paint and stain beautifully, but does not need either, except for looks—lasts and lasts and lasts and lasts without them. (See U. S. Govt. Rept., reprinted in full in Vol. 1, Cypress Pocket Library. Just mention that you'd like this book, also.) This Pergola-Garage is AN’ ADDED SUPPLEMENT tothe 13th big reprint of VOLUME 28 of that home-lovers’ guide, counselor and impartial frienc, the famous Cypress Pocket Library. It's FREE. Will you write? When planning a Pergola,Mansion, Bungalow, pasture-fenceor sleeping poreh,remember,‘‘ With CYPRESS you BUILD BUT ONCE” your service with i SOUTHERN CYPRESS MANUFACTURERS’ ASS’N.¢ 1219 Poydras Building, New Orleans, La., or 1219 Graham Building, Jacksonville, Fla. Sip Let our “ALL-ROUND HELPS DEPARTMENT” help YOU MORE. Onur entire resources are at Rel Ble C i INSIST ON TRADE-MARKED CYPRESS AT YOUR LOCAL LUMBER DEALEB’S. IF HE HASN'T IT, LET US KNOW IMMEDIATELY ~~ eer

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wm =~ = | — | BiG

Popular Mechanics Magazine

6 N. Michigan Avenue, Chicago, U.S. A. H. H. WINDSOR, Editor London: Hachette & Cie, 16-17, King William Street, Charing Cross, W. C. 2 Paris: Hachette & Cie, 111 Rue Reaumur Melbourne, Australia, The Australasian News Co.

iSSUED MONTHLY To all other countries in the Postel Union SUBSCRIPTION: In United States, and its possessions, Cube, Mexico, and Canad, per year, postpaid - SINGLE COPY, 25 CENTS $3.00 3.50 All subscriptions are discontinued at expiration. Please examine the date printed on your wrepper. Entered as Second Clase Matter Sept. 15, 190%, at the Post Office at Chicago, Illinois, under Act of March 3rd, 1879. Entered as Second Clase Matter at the Post Office Department, Canada. Published monthly by POPULAR MECHANICS CO. Copyright, 1922, by H. UH. Winpsor. Copyright to Australia

Vol. 37 Contents for June, 1922 No. 6 Air Compressor and Hoist on One Support......... 922 SO, PUD pcenenavedsesenetencpedesdietbsins 926 Air Compressor, Overheated, Stopped by Fusible Plug 868 Clock, Unusual Hand-Carved, Made Entirely of Wood 844 Air Moisture Eliminators of Demountable Type..... 9 Coal, Flotation Process Adapted for Cleaning........ 916 Airplane, French Design, Has Lower Wing Larger Than Top ....--cccecceceeers oo as eseee set seeeees aioe, Goliath, Controlled with Automatic Pilot... 857 Airplane, New Spad, for European Air Lines........ 895 Airplane Service, Commercial, Starts in California... 870 Airplane, Small, Is New Customer for Gasoline-Filling > Station Airplane, Wrecked, Portuguese Airman Halted by... 840 Airplanes, Two London-Paris Air-Route, Collide and SS Pe eee oe esteeceesecees 869 Airship Service to India and Australia Proposed..... 848 Airships, German, to be Manufactured Here......... 918 Airships, New Noninflammable Gas Produced for.... 906 Alcohol as a By-Product of a Mexican Plant........ 934 Apple Storage House Has Good Ventilation......... 938 Automobile Armrest Easily Attached to Side of Door. 938 Automobile Boat Tested on River Rhone............ 881 Automobile Elaborately Equipped for Camp and Out- ine GOW sc kn toned rade bennens 040 heed oon onees 862 Automobile, Racing, Three-Mile-a-Minute Mark Reached GH sinc cndecs«¢0cc aches sas sesveksicnnn 844 Automobile Serving Table Stands on Running Board. 858 Automobile, Specially Built, Employed for Sleeping.. 928 Automobile, Specially Designed, for Transporting Canines to the Chate.ccccccvcccoscccccsecccccees 887 Automobile Speedometer Changed to Make Soil SArVONS onde ccducaeea dees shapes beeen ttunnsteese 874 Automobile Tail Lamp Designed for Protection...... 919 Automobile Timer, Improved, Has Only Two Wires. 871 Automobile Tires, Corrugated Rubber Tubes for... .. 869 Automobile Wheels, Tire Ropes Replace Chains on... 891 Automobile Whistle Plays Any Tune at Any Pitch... 822 Automobile Windshield Cleaner Wipes Upper Half... 934 Automobiles, Pliant Metal Spring Cover for......... 933 Automobiles, Watch Carrier for, is Handy Accessory 932 Ax, Steam Operated, for Chopping Redwood........ 906 Banjo Resonator Amplifies Its Volume Snappily..... 932 Bank, Home Savings, Combined with Desk Watch.. 890 Barracks, Army, Runaway Truck Demolishes........ 885 Bearing Bushings, Swedging Tool Renews without errr Te (use abned weedens 938 Bed Making Contest for Hotel Chambermaids....... 858 Bed, Tourists’ Folding, Fits Rear Auto Seat........ 870 Belt Guide, New Type, for Use with Long Belts..... 879 Belt, New Type Leather, to Prevent Slipping........ 880 Bootleggers, Bold, Life Saving Belt Adopted by..... 829 Bootlegger’s Trick Can for Swindling Customers... .. 903 Bridge, New Steel, to Cross Columbia River........ ‘. 828 Caliper Has Scriber for Marking Centers............ 932 Camera Attachment, Simple, for Stereoscopic Views.. 865 Camera, Jewelers’, Makes Exact Size Pictures....... 894 —— Wastes, Experimental Purification of....... 928 afion ~ anc alls Serve as Poles for Transmission Wires. 820 Capitol, Old Washington, Given to Woman’s Party.. 858 Car Dump, Automatic, Newly Designed............ 917 Carburetors, Auto, Air Stabilizing Attachment for... 895 Cattle, Blooded, Identified by Means of Nose Print.. 915 CONNIE ENS soviet su0sccsdtesnuas< cSeasdedccas 936 Church Building, Abandoned, Utilized as a Garage... 886 Church, Shreveport, Has Many Unusual Features, by Archie Richardson . err ag Ses 866 Coal, Low-Grade, to Produce Electric Power with... 830 Coin Collecting Appliance Fashioned Like Scoop..... 900 Colors, Harmony of, Tested by Revolving Disk...... 900 Comment and Review, by H. H. Windsor........... 845 Community Center at Isolated Power Plant, by Charles i MT nndeTwulstpsensewskaeeine es ehenes Saha Concrete Span, Huge, Fire Causes Fall of........... 908 Concrete, Tower Tests Waterproofing Material for.... 913 Container, New, for Sending Tokens of Friendship... 868 Conveyor, Automatic Aerial, for Shingle Bolts....... 860 Copper, Oxidized, Process for the Recovery of....... 902 Corn Borer, Insect, to Investigate Migration of...... 908 Cotton, Blue, Now Bleached to Increase Its Value... 864 Cotton Seed Treated for Elimination of Diseases Cotton Warehouses, Models Show Best Type of Crossing Markers, White Cement Blocks tor......... 885 Crystal Palace Tower Tanks, Preserving from Rust.. 904 Date Harvesting Requires Both Skill and Agility.... 924 Dehorner, Improved, Cuts Both Horns at Once..... 933 Department Store, Self-Government Practiced by..... 933 Dictaphone Records, Loud-Speaking Reproducer for. 871 Ditching Machine Does Work of Many Men........ 873 Dome, Large, New Method of Painting Interior of.. 869 Drydock, Canadian, Work on Ordered Abandoned... 872 Dumping Car, Monorail, Now in Use in Germany... 910 Dyes, Germ Killing, Experiments in Production of... 834 Egg Carrier, Cardboard, for Shipping............... 862 Electric Fan, Spherical, Throws Air Radially........ 918 Electric Furnace, Self Adjusting Electrodes in....... 897 Electric Lighting Project for French Villages....... 844 Electricity-——-High-Tension Direct-Current Power from Reowes Circuits, Or H. A. Lame. 2.0. sscccecccece 821 Elephant Has Wooden Leg as Added Attraction..... 868 Engines, Oil and Air-Cooled, Developed in England.. 925 Evaporator Tubes Arranged in Diagonal Lines....... 886 Ferryboat, Large, Terrific Boiler Explosion on...... 855 Floor Oils, Test Darkening Effects of.............. 830 Flue Hole Stops, Fireproof, Invisible on Wallpaper.. 917 Fly Traps, Sanitary Paper, Made Ornamental....... 862 Garage and Cottage Combined for Touring Motorists. 918 Garage, Basement, for Office Building Tenants...... 921 Gas Burner Is Adjustable for Any Pressure......... 904 Gas Main “Sweat” Collected from Drip Wells....... 897 Gas, Natural, Wild Wells Cause Great Loss of...... 916 Gas System, High Pressure, to Solve Fuel Problem... 818 Glass, Unbreakable, Now Produced............+++0+ 924 Glider Flight, Remarkable, in Switzeriand........ --. 819 Harrow Plows and Pulverizes in One Operation..... 861 Headlight Shield, Auto, Aids Driving at Night...... 894 Heater, Wall-Pocket Gas, Set Flush in Wall......... 832 Heaters, Odd Departure in, Used in Switzerland..... 847 Horse, Artificial Nose Placed in Nock of.........-. 935 —, New Chicago, to Have Five Bungalows on SE. wctennsbardn cons Scagbeeeannsekeenet eeueens House Number on Curb to Guide Motorists......... 906 POGUE DONOR... cccnsnn khan sb Geedeevewnac ewes 930 Hydroelectric Station, New, in Valencia, Spain...... 848 Hydroglider, Japanese, Built Like an Airplane....... 907 Iron Foundry to be Erected on South Georgia Island 919 Irrigation and Water Power Development to Restore the Holy Land, by Lewis R. Freeman............ 849 {Continued on Page 4]

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[4] [Contents—Continued] Jack, Automobile, Combined with Rim Contractor... Jumping Stunt, Spectacular, Ends in Death......... Kitchens, Steel, for Conserving Space..........-++++: Knife, Electrically Heated, Aids Battery Men....... Kudzu, Forage Plant and Soil Builder, by C. E. Pleas Labels, Metai, for Salutation in Letters.............- Ladder Has Auxiliary Legs to Prevent Accidents.... Lathe, Center Drive, Resembles Two Machines Leather, Rubber Solution Removes Stains from...... Library, Free Public, “Walking Books” Advertise... Library, New, being Erected at Louvain............ Lighthouse Floats Five Miles Down a River......... Lighting Effects, Unusual, Produced in Church..... Locomotive, Double Drive, with Boiler in Center.... Locomotive Explodes with Unusual Violence........ Locomotives, Strange Type, in Himalaya Mountains. . Logging Truck Runs on Wire Covered Track........ Mail, Recalled, Romance of the, by Grace Orb...... Memorandum Pad, Convenient Desk, Keeps Paper Clean Memorial, Booker T. Washington, Unveiling of..... Memorial, Robert E. Peary, Typifies Arctic Exploits. Mill, Century Old Stump, Still Grinds Grain Mine, Model Visualizes Inside Workings of Mines, Wet Drills Reduce Dustiness of............. Miter Scribing Instrument for Irregular Surfaces..... Monument Unveiled in Paris to Victims of Bombard- DE datnteecs ceeded eesadseasetencanasteeeanes Mosque, Only Mohammedan in Western World...... Motion Picture Camera, “‘Direct-Positive’” Home..... Motion Picture Films to Show Events of American PD Gacacendenetscduadeceaceunceswenses skate Motion Pictures Made Audible by Use of Phonograph Motion Pictures, Talking, Made with Aid of Radio.. Motion Pictures to Illustrate Einstein Theory Motor Busses on Rails to Replace Street Cars....... Mountains of Burma, Expedition to Investigate...... “No Man’s Land” at Rheims Contains 600 Houses. . Nonmagnetic Force, New Attractive, Discovered... .. North Pole Flight, Amundsen to Attempt, by Law- EE renee nae Oil Development Predicted for South America Oil Gusher Damages Residential Part of City........ Oil Production Lessened by Delay in Drilling Oil Wells, Obstructed, Machine for Cleaning........ Operation, Flashlights Used by Doctor to Complete. Orange Grove, Propellers Circulate Air to Heat Paper, Mulching, Prevents Weed Growth........... Pecan Trees, Culture of, to be Tried in China Pencils, Rubber Grip for, Prevents Slipping.......... Phonograph Sound Box with Perforated Disks Phonograph, Special, Sends Concerts by Radio Pianos, Grand, Three Sectional Top Lid for......... Pile Driver, Tiny, Drives Pipes at Pole Base........ Pipe Bowl, Two-Piece, Smoke Takes Spiral Course in Plow, Tractor-Drawn Brush, for Land Clearing Power Shovel, Novel, Gas Engine Drives........... Press, Foot, Ordinary Seal Hand Press Made into... Radiators, Cloth Covers for, Keep Walls Clean...... Railroad—Brake Rods, Automatic Slack Adjuster for Railroad Cars, Wooden, Have Longer Life Than Steel Railroad Crossing, Two Span, of River in Washington Railroad Diner, English, Electrically Equipped....... Refrigeration Plant, House, Simple and Noiseless... . River Currents, Erratic, New Means of Controlling. . Road Building, Concrete, Float Bridge Aids......... Road Roller, Three Wheel, Has Engine at Rear Roofing Materials Tested in “Exposure Parks’’...... Roofing, Roll-Changing Machine Used in Making.... Rugs, Paper Tubes for Shipping................000. Ruins of Colophon, Excavations will be Made at.... Saw, Portable Bench, Cuts Miters at Any Angle Saw, Shaping, Does Complicated Shaper Work...... Sawdust Converted into Cattle Food by Chemical I hata lla ak Sree bla rai od WE AEN. ED aR GN we Screwdriver, Adjustable Handle................e0-- Settlers, Wisconsin’s Novel Method of Attracting..... Ships, Copper-Sheathed, Menace Iron Vessels........ Signal Device, Protection, Fires Ten Shots Silo Top Made with Hinged Segments.............. Slack Puller to Replace Block and Tackle........... Soap Bubbles Made to Study Explosion of Gases... . Solder Iron, Self Heating, without Valve or Pump.. Soldering Iron and Blowtorch Combined............ Stage Scenes, Rapid Method of Changing in Berlin. . Street Drain and Manhole in Combination Inlet Street Washer, Motor, London’s Midnight........... Stump Removing Machine Leaves Only Chips Surveying Test b sete eee rill Holes an Interesting Process... Swimming Buoy for Nonswimmers Made in Animal EE os 056d ead ohakde 0 d0 0.444008 e oOSe ee aaeens Table Top, Inlaid, Thousands of Pieces Used for.... Tax Computing Machine Has Chart for Any Tax Ne ccc aka oatana ede Che henen ds ceheshabeabhewee Telephone Cable, New, Laid across Irish Channel.... Telephone Service Measured Like Electric Light..... Tile Ditcher Does Work of Many Men..... ae Timber Preservative, Copper Sulphate Water Is Tires, Worn-Out Auto, Used to Build Fence........ Tool Set, Quick Change, Has Detachable Bits...... Totem Poles “Copyright Law” of Northwest Indians, by Francis Dickie ..........--+++++s se Sew ecesoces Tractor, Powerful Steam, Has Two Engines......... Tractor Route, Sixty Mile Beach Used as........... Tractor Snowplow, Combined, Cleans City Streets. . Tractor, Trac Tractors, Five, Reduce Farming to Single Operation. Tree, Historic Pine, Lived 1,200 Years............. ¢ Trees Grow from Stone Bags Used as Flood Pro- tection Trout Sorted into Sizes by Roller Sieve............. ¢ Truck, Elevatin Platform, Has Gasoline Motor..... Truck, Motor, levating End Gate Attached to...... Truck, Two Purpose Factory, Has Four Lifting Legs | Turbine Plant, Gigantic, Designed...... eebececceess Valve, Automatic Ball, of Extreme Simplicity Vending Machine, Miniature Pistol Range Is........ Ventilation of Machinery Increases Efficiency...... Wallpaper, Electric Steam Machine for Removing... Warships, U. S. Navy, Scrapping, by H. G. Layton. Water, Surplus, Gravelly Soil Used to Store........ Watercycle, Life Saving, Folds into Small Space..... Waves, Novel Attempt to Utilize Energy of........ Welding Machine, Arc, Uses Alternating Current... Wireless Apparatus, Four Sets of Headphones on.... Wireless Apparatus to Make Mountain Climbing Safer Wireless Equipment Installed on Railroad Trains... Wireless Generator, Single Blade Propeller Drives. . Wireless Messages Received on Phonograph Records Wireless Outfit Combined with Airman’s Oxygen er Pore TT Te ere eee Wireless Reproducing Apparatus, New, Aids Radio ED, 56.0 66.05.40 bate ctnsse evceséetseespeses Wireless Telephone Broadcasting over Light Wires. Wireless Telephone Customers, Prospective, Listen Whike. They Shep. ..cccccvrcovese eeecccooecee SHOP NOTES Acetylene as a Primer for Cold Engines............. Se , DINE, sc cc accchcnedise 0btacn es Belt Shifter, Automatic, for Grinder.............. Belts, Emery, Prolonging the Life of...... Belts, Flesh or Grain Side for............... Block, Adjustable, for Hacksaw Vise............. Calipers, Scale Attachment for Setting.............. Carriage Bolt Holder, Improvised.............. Clutch Shifter Made to Stay “Put’’............ Concrete Walls, Preventing Sweating of........ Core Boxes, Hacksaws as Facing for............ ee ee EF re Drawing Board Drawer, Keeping in Place..... Drawings, Trimming with a Knife............. Dynamite, Some Ingenious Uses for......... Engine Testing at the Muffler.............. Gas Controller, Automatic, How to Make...... Gaskets, Cylinder Head, Locating....... caries Gauge, Depth, Scale Used as.......--......... Gauges, Small Thread, Protecting...... apa tae Hasp, Preventing from Breaking................ Se |S OE eer ere DEGOR, GEE TR sccccccsceseccessees OR OR 3 ere eer Sig Clame, Quictiy Onorateds. .... cc cccccccessce Knurl Holder Fits Lathe Toolholder........... Lawn Mower, Sharpening with Power.......... Magneto and Generator Testing Base........... Nails Prevented from Splitting Thin Wood..... Nonmagnetic Materials, Holding on Magnetic Chuck Nuts, Rounded Edge, Tightening.............--+->- Oilcan, Increasing the Reach of............-.-- Pistons, Jack Prevents Distortion of............-- Potato Planter Made from Old Corn Planter...... - Punch and Die, Simple, How to Make , errr eee i EE CR ne cea bunniheee ee ane Screw Hooks, Driving Quickly........... Scribing Long Straight Lines........... [Contents Continued on Page 6] Treads Give Greater Pulling Power to 916 818 865 920 827 §31 - 916 950 941 942 Ga 948 953 ~~

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POPULAR MECHANICS ADVERTISING SECTION DRAKE $

PRACTICAL

BOOKS

MECHANICAL 3 9 3 3 Taal 0 1 0 ORDER ON 5-DAY TRIAL 8 The books listed below will perfect you in your chosen trade — pave the way to the big positions. L Written in non-technical language—easy to read and understand. Every book covers its subject Z completely. An entire course of instruction condensed into one volume. Your choice sent : postpaid — you benefit 5 days — money refundedin full if not entirely satisfactory. Order direct from this page )1 Handbook for Millwrights.Cloth $2.00 | Steam Boilers...... Leatherette $2.00 i4 Modern Blacksmithing. ...Cloth $1.25 | Swingle’s Catechism of Steam, H Machine Shop Practice....Cloth $2.00 Gas and Electrical Engineer- 72 J Mechanical Drawing and Ma- BP cesesicscedscs Leatherette $1.50 00 AUTOMOBILE chine Design ........... Cloth $2.00 82 | od Pattern Making..-..-..-- Cloth §1.50 Painting Books 77 Nig cares Scene Painting and Bulletin Art a | Carpentry Books =| “ene Painting and Bullets Cloth $4.00 84 Cloth Binding A Show at Sho’ Cards....Cloth $4.00 81 Modern Carpentry, 2 vols...... $3. 00 es Pe cc vensenenl Cloth $4.00 23 The Steel Square, 2 vols........ 3.00 | Strong’s Book of Designs...... 68 Wooden Boat and Shipbuilding. i. = seeesseressens ses - Leatherette $4.00 103 \ Modern Estimator ............. Strong’s Art of Show Card Writ- 135 Timber Framing .............. 2" 00 s ee Cloth $4.00 90) Builder's Architectural Drawing.$2.00 | Signist’s Alphabets....... Cloth $1.50 9 PEE ncansccekeseneeecenseas $1.50 | Modern Painter's Cyclopedia. 4. Practical Bungalows .......... $1.00 ore resesecesscsscoeceees Cloth $2.00 28 Low Cost Homes...........sss. $1.00 | Automobile Painting...... Cloth $1.50 348 00 ami Estimates, Costs and Profits, BOG DUO ccccwes a0ese - $1.50 , 334 Stair Building and Hand Rail- Painting and Decorating.Cloth $1.50 318 ° dadiiclenktaddéwedéonenna $1.50 | New Hardwood Finishing.Cloth $1.50 442 Automobile Books The Amateur Artist...... Cloth $1.50 365 Electrical Books New Stencils .........+.- Cloth $1.25 990 Automobile Ignition, by Manly F B k F . MEL Pets - Le satherette $2.00 | Practical Applied Electricity... - oe arm DOOKS Automo Vi e arting and Light- Alternating Current ........... 7 , 880 ing, by Manly...Leatherette $2.00 | Piectrie Motor Control Systems. st 4 — ee nsores sees — oe - Brookes’ Automobile Handbook. Wiring Diagrams and Descrip- Farm Engines Cloth $1.25 jinn fan Barer Leatherette $2.00 SE Ghévsssveeevenasesoones 80 | Traction Farming........ ‘Cloth $1.50 83 Ford Motor Car, Truck and Electrical Tables and Data..... $1.50 Tractor, by Manly...... Cloth $1.50 | Armature and Magnet Winding.$1.50 aie git Starting and ~~ oe Modern Electrical Construction. .$1.50 Remedies an epairs, y Modern Electric Hlumination. . :$1.50 Manly cssacreee. Leatherette $8.00 | Electricians’ Operating and Test: and Reference Books Automobile Battery, Care and i’ hatcbniwueds das bead eveseod 1.50 | Better Business Letters Repair, by Manly.Leatherette $2.00 | Motion Picture Operation....... DT wiskecetetneywhase Leatherette $1.50 950 Automobile Catechism and Re- Drake’s Electrical Dictionary...$1.50 | Better Business English..... 041 pair Manual...... Leatherette $1.60 | Electric Motors, D. & A.. oe . $1.50 ee ree Pe Leathere tte $1.50 = 4 Tires and Vulcanizing, by Tuf- Electrical Measurements and Me- Retter Advertising.. Leatherette $1.50 U%e BOGE cvccccccccccccesces Cloth $2.00 "errata 1.50 | Finger Prints Simplified. .Cloth $2.00 94 Gas and Oil Engine mantis. Drake’s Telephone Handbook...$1.50 | Practical Bricklaying.....Cloth $1.25 — FB 88 . @xaencupecédasmesaoaasens Cloth $1.50 | Modern American Telephony....$2.00 | Practical Instruction for Detec- 9E Automobile Upkeep and . Easy Electrical Experiments. . Me cL avesdibamenreied Cloth $1.00 94C Oe PI vc ckcincdscasens 8? 2) eee einem aceiae Cloth “$1. 25 | Practical Plumbing ...... Cloth $1.50 94 Motorcycle Handbook, vad Manly Wireless Telegraph and Tele- Hot Water Heating....... Cloth $1.50 a. =6=6—hlolCO«sép pig he ae i -Cloth $1.50 phone Handbook........ Cloth $1.25 | Elementary Chemistry....Cloth 4 94 Telegraphy Self-Taught...Cloth $1.25 | Courses in Civil Service...Cloth $1.50 7 Shop Practice Books S “aera Cyclopedia of Wecipes. “Cloth $1.50 . Star Speaker. 9 Sheet Metal Workers’ Manual. . $2.00 | s team ngineering “Mod ot: ee = 7 i ‘@ ._ es OUR MONEY-BACK PLAN —— | 953 ‘ The books listed above are only a few of the many in & CO 952 : our catalogue, which you will receive promptly after 1cCK J. DRAKE ” 94 filling out and mailing us the attached coupon. For amen nue Q quick action order direct from this page—cross name of 008 Michig2® Ave aa each book wanted and send in with price quoted. We y 1 ll g2U prepay postage and send the books on our money-back Chicago, iil. e paid, your 9 plan Please send me free, new hy over 100 4 FREDERICK J DRAKE & co GENTI MEN logue which lists and fnew my kK -- ° ° illustrated car nical Books for Home * ~ wm ica’ e 94 PUBLISHERS 4 bute as 1008 Michigan Ave., Chicago alll aalishnonoonnrrmnne . w y 95 Drake Books Are For Sale at All Book Stores | sa dhl ;$lt™ O a 94 and my address .---++*"* 9: Mail Coupon For FreeCataloSue = mmr

Your Guide to Home Study

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6 POPULAR MECHANICS ADVERTISING SECTION DonTSWEATOVER A AircHenSrove! No excuse any more for fussing and fuming over a hot kitchen stove in summer time! No need of keeping a hot fire going all day just to do a little cooking. Amaz- ing new invention does away with this dirt, muss, and _ kitchen drudgery. Amazing Invention Gives plenty heat when you want heat. You turn it off instantly when you don't want heat. Cheaper 5% oil. Burns 95% air Saves money, time, labor, health. No fires to make, no ashes, dirt, smoke, odor, chopping, shoveling, carrying dirty coal or wood. Quick Heat tirecivaive Don’t let your coal-and-wood stove turn your kitchen into a roasting-room. Wonderful invention—Oliver Oil-Gas Burner gives quick heat at turn of valve. Fits in fire box without adjustment. Note how simply it works, Ab- solutely safe. Lasts lifetime. Fine all seasons. No roasting Summer kitchen. Ready heat in chilly Fall and Spring. 3 times more heat in Winter. FREE BOOK telling all about the “New Kind of Heat,” sent free. Also amazingly low introductory-price offer including 30-Day Trial. Write today. OLIVER OIL GAS BURNER & MACHINE CO., 2014-F Pine St., St. Louis, Mo. Oldest, Largest Manufacturers of Oil-Gas Burners in the World. AGENTS cao 4 agents earn as high as $500 a , $25 a day spare time is easy. Exclusive territory. Big all-season seller, Write for Special Offer. ‘Hotels Need Trained Executives Nation-wide demand for trained men and women in all de- artments of hotels, clubs and apartment houses. Uncrowded eld; fine living, quick advancement in the big hotels of the United States —- now America’s Fourth Largest erie Statistics show that ONE IN EVERY TEN HO WILL HAVE AN OPENING FOR A MANAGER THIS YEAR. Thousands of other positions also open to those who ualify through training ’ . The Lewis Bec 901 guarantees to sive, you the valuable knowledge that it xv hae taken some of the most successful hotel men years to obtain--men ’ who are now making $5,000 to rt 50,000 a year. All of your training ’ will be under the personal direction of Clifford Lewis—-a hotel expert of national reputation A few spare-time hours a week given to Free - . the simple, clear lessons of the course will open the way to ® Coupon s good position, a fine living and a handsome salary. The train- Lewis ‘ey ing willin no way interfere with your present activities. HOTEL . Send today for FREE BOOK, “Your INING Big Opportunity.’ Don't wait a min- TRA & Opr SCHOOL e ute you may lose the opportunity Room 319 ©o, of aflifetime. Mail the coupon Washington, D. C. “ NOW. Your whole future may Send me Book™ = ion ™~ de pend onit. Founded 1916. he FRE 30 ur B Opportunity.” " O\. pREINIna Sonoon Name...... Wie bans Mone" 7“ Clifford Lewis, Pres. ease rm ame »., Room 319 Berees .nccccccrccccccccccccses Washington, D.C. + ee er eee [Contents—Continued from Page 4] i 2g SS 8 Oe Se eee ee Soap, Soft, Handy Container for...... a dl Springs, Cutting after Winding................. Square, Center Punch Attachment for..... Switch, Knife, Guard Pilate for........c0sccecess. po OS EE 5 Pee oe Tap Holder, Novel, for the Drilling Machine... Tractor, Some Unusual Jobs for the........... Tree Surgery, Certain Features of, Patented........ Type Cases for Holding Small Parts........... Water Tank, Raising 25 Feet... Windlass Holds Hay on Truck AMATEUR MECHANICS Automobile Mudhooks Made from Hinges.... Automobile Theft Alarm, Improvised.......... Automobile Trouble Lamp Mounted on Clothespin DGES TREE, TOROTMONET. oo ccc cccccqecccecwsness Bags Quickly Placed over Clothing. . Berry Picking Made Easy............-. ED, PO POMGRS Th. ns cccceccccwccscece Bird Bath of Simple Design........... Boat Rudder for Shoal Water................. Box Lid, Secret, How to Make.......... Brush Hook Made from a Shovel............... Bureau, “Built In,’’ Saves ee ale oe eae Climbing Irons, Improvised...... I INI «an 2.0 ado ada ps eae « Door, Padlocked, Opened from Either Side. OUND DEORE, TROGIR. «cc ccccicrswercses Faucet Guard for Dishwashing............-. Faucet, Hose, Preventing the Use of.. Fish Bait, Unusual, for Salt Water Fish........ OE WE, MOUNDS 6 6 6 cnneceasee 06 stuns. Foot Scraper, Simple, How to Make.......... Furniture, Skate Aids in Moving Gaskets, Cork Auto, Carrier for.............. Cem BOG, TONNE 60 eins cccccceenes Hoe, Garden, NPE ET Ie Hoe, Guard Prevents Dulling of............... Horse, Se, SOON OR TNR, 6 cc ccccsesccvces Hose Connections, Garden, Washers for....... Key Guide for the Back Door...........-..+--5:: Lawn Mower Handle, Strong, How to Make.. Lowe Goetebier, Bleee... i ccctcccctsdccssess Lens Hood Made from Drinking Cup Lenses, the P-BMumbers of... 1... .cccsccccccecdccs Linoleum Makes Sanitary Poultry House Floor. Lumber, Yellow Poplar, Drying............. Medicine Dropper Kept Handy on the Bottle Motor, Small, Simple Mounting for. Motorcycle Delivery Truck, How to Make. cbc ce ban aees beds ceed e~na’ Parachutes, Toy, Release for Pen, Portable, for Chicks............. Piano Rolls, Player, Repairing.......... Pictures, Framed, How to Hang Poppies, Growing Oriental............. ae Prints Judged for Good Sepia Tones............ Rubber Stopper Used as Spring... Screen Door Fastenings, Permanent ee | rrr Seeder, Simple, How to Make. pba Shelf, Bedstead, for the Sick Room...... Shoes, Tan, Restoring Color to Sod, Cutting around Trees Sod, How to Lay Properly........ Soldering Blowpipe, Homemade... Steam Boiler, Small, Electrically Heated. Swimming under Water ee EE Ie, ee eee Swing, Airplane, How to Make , ccnle ceedeeewes Cackeen ane Trapping Rodents without Bait Tray, Improvised Developing........... Trellis, Indoor, Made from Chain Typewriter Ribbons, Restoring................. Vacuum Cleaner, Cooling Breezes from Windows, Center Pt, MOON 64 008 cb cccoses Wireless Telephone Receiver, Short Wave 958 ae 9° 977 978 969 970 978 . 963 cesr. in iness STUDY AT HOME Become lawy ly trained men win bigh "positions and big su i and public ities now than ever $3,000 te $10,000 Annually We guide you step by step. You can tre'n at home during spare time. Let us sene and letters from you records le r le ote udent admitted to the in various . Money refunce ding to our G Bond if dissatisfied. Degree of Ll. | conferred. aful lied. Low cost Johone Lay, Lisrary.. Get ow ‘civabie 130 page’ Law Guide™’ #03 rary our D *Evidence’’ books FREE. Send for them—NOW. LaSalle Extension University, Dept, 6641 Chicase, !!'.

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— wv SProwovrnm~ ~~ 63 oat POPULAR MECHANICS ADVERTISING SECTION 7 Let These Guides HAWaINs Hawa HAWKINS Fxanodl Fxcweol Ecos) L | [Gune | ‘Cune) ‘Cue! Gupe. Vig V5 | 3500 PAGES $1 A VOLUME 4700 PICTURES $1 A MONTH Know the facts in Electricity. They mean more money and better psition for you. Hawkins Guides tell you all you need to know about Llectricity, Every important electrical subject covered so you can ul dersts and it. Easy to study and apply. A complete, practical |} working course,in 10 volumes. Books are pocket size; flexible covers. Order a set today to look over LEARN ALL ABOUT M agnetism— Induction —Experiments— Dynamos—Electric Machin- Motors — Arinatures — Armature Windings Installing of Dynamos—E lectrical Instrurient Testing—Practical Man: agement of Dy namos and Motors—Distribution Systems— Wiring— Wiring Dia- rams—Sign Flashers—Storage Batteries—Principles of Alternating . irrents and Alternators—Alternating Current Motors—Trans- formers—Converters— Rectifiers— Alternating Current Systems—Cir- it Breakers Measuring Instruments Switchboards — Wiring Po wer Stations— Installing — Telephone— Telegraph— W ireless— Bells ghting—Railways. Also many Modern Practical Applications of Electric ity and Ready Reference Index of the ten numbers. SHIPPED FREE Not & cent to pay until you see the books. No obligation to buy unless you are satisfied. Send Coupon now—today—and get this great help library and see if it is not worth $100 to you—you pay $1.00 a month for ten months or return it. HAWKINS HAWKINS ELECTRIC Solve Your Problems Hawks Hawi Hawatns Euerraical’ — Etecre Lurcreat Cue; jG ne GUIDE _ ee ee - ; j Al; 5 a I i | wininc | i + POWER ” ‘ ey er end L GUIDES vovwmes VOLUMES Send No Money--Send Only This Coupon THEO. ph erty y &cO 72 Fifth Ave., New York City Please submit me for free examination, HAWKINS ELEC- TRICAL GUIDE, (Price $1 a number). Ship at once prepaid, the 10 numbers. If satisfactory, lagree to send you $1 within seven days and to further mail you $1 each month until! paid Name seem eee cesar seer reese seseseesesesees oreee CCCUDMBUOR. . 0c ccc ccc ceeccescessecesceseseeseseseeeees® soecee Employed DY... .. ccc ccccccccccccccccccceseseseseese seeeeeee BEOGNO BGGIGER, 2 oon 0000 0000060660006500000000000060008 seeeree ROSSTORED .. co cccvecccrccccccecsceseccccuceoeoesoscogesonse PM JU NE 33

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8 POPULAR MECHANICS ADVERTISING SECTION 72,000 Men at $3600 Per Year to Fill Vacant Draftsmen’s Chairs Write to me today if you want to sit in one of the many vacant Many a man who has written to me now earns $3600 or more. chairs like this—if you want a TY position as a skilled The draiteman’s Sazins 5 they ‘ot om 2 me gave them the draftsman at $3600 a year. Now the time to get teedy for powgs to command this There wil be no obligations on al pre arog SS ga ee Closest estimates fix the number of men who will be needed ous aEw > cen you personally ove month during 1922 at 6000. Write t to me and I will tell Lehr ay mT ihe grade draftsman. This c is yours I make you a first-class, big money-earning draftsman y ’ De very few months—in plenty of time so that you will beready. | Will you accept the opportunity? I Guarantee to Train You Until You Are Placed in a Position Paying from $250 to $300 per Month Bo qther man or tnotitudion can imitate my method. I fa Goo Mind of Destrention you need to held one of the teach you personally. | give you private instruction. pice paying 41—-"7 1 know what the big firms demand Tassie ponese how f a success as a drafteman. ember, 1 train you until you are actually placed in For 2 years {have been doing the highest paid expert yo yl — from $250 to $300 per mon’ € ing work as chief draftsman So write to me today. Do not put this conestantiy off. So the instruction you get from me ts practical. Theat Positions are open right now—this very minute FREE! $25.00 Drafting Outfit Here is the high-grade drafting outfit which I give you with- out one cent of expense to you. Every instrument of the highest quality. Everything you need. Packed in a hand- ‘ some plush lined case. Just the kind I use myself. Chief Draftsman Dobe, 4001 Broadway, Dept. A135, Chicago, II]. Chief Draftsman Dobe S008 Becaduan: Bape. £108, Chtenee, 8. adel vaitbaiaien While Learning maueeen =, raftemansh wiptnesre, gies, —y~" your Rook, oe you pnd dy my may to aa = pow ba me fe Ag This uccessful Draftsmanship. * and full particulars of your li some begin this practi **Personal Instruction’’ offer to a few students ' — why tS not te “abi 6 - ° - now at ~ their way as they go along. ite for this Ty today, if you are a man dreaming of a big | Name. Mail Coupon Today There are no obligations in sending your name and address to me on this free coupon. Send it today. 1 will mail you at once Address ___. absolutely free and prepaid my new book, ‘‘Successfal peak. now ana 7 tt will tell you why so many men are needed rig now and it will tell you how to earn money while learning. = send the coupon now ban on

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POPULAR MECHANICS ADVERTISING SECTION 9 I Teach Piano a Funny Way So People Told Me When I First Started in 1891. But now, after over twenty- five years of steady growth, I have far more students than were ever before taught by one man. I am able to make them successful players of the piano or organ in quarter the usual time at quarter the usual cost. To persons who have not previously heard of my method, this may seem a pretty bold statement. — But I will gladly convince you of its accuracy by referring you to my graduates in any part of the world. There isn’t a State in the Union that doesn’t contain many players of the piano or organ who obtained their training from me by mail. Investigate by writing for my 64-page free booklet, ‘‘How to Learn Piano or Organ.” My way of teaching piano or organ is entirely different from all others. Out of every four hours of study, one hour is spent entirely away from the keyboard, learning some- thing about Harmony and The Laws of Music. This is an awful shock to most teachers of the “old school” who still think that learning piano is solely a problem of ‘finger gymnasties.”” When you do go to the keyboard, you accom- plish twice as much because you understand what you are doing. Within four lessons I eons you to play an interest- aly, not r + in the origin- al a but in all other keys as well I make use of every possible scientific help—many of which are entirely unknown to the average teacher. My patented invention, the COLOROTONE, sweeps away playing difficulties that have trou- bled students for generations. By its use, Transposition—usually a “nightmare” to students—becomes easy and fascinating. With my fifth lesson I introduce another important and exclusive invention, QUINN-DEX. Quinn-Dex is a simple, hand- operated moving- picture device, which enables you to see, right before your eyes, every movement of my hands at the key- board. You actually see the fin- Marcus Lucius Quinn Conservatory of Music Studio PM 46 598 COLUMBIA ROAD, BOSTON, 25, MASS. DR. QUINN AT HIS PIANO From the Famous Sketch by Schneider, Exhibited at the St. Louis Exposition ers move. Instead of having to reproduce your teacher's nger movements from MEMORY—which cannot always be accurate—you have the correct models before you during every minute of practice. The COLOROTONE and QUINN- DEX save you months and years of wasted effort. They can be obtained only from me, and there is nothing else, any- where, even remotely like them. In all essential ways you are in closer touch with me than if you were studying by the oral method—yet my lessons cost you only 43 cents each—and they include all the many recent developments in scientific teaching. For the student of moderate means, this method of studying is far superior to all others; and even for the wealthiest student, there is nothing better at any price. You may be certain that your progress is at all times in accord with the best musical thought of the present day, and this makes all the difference in the world My course is endorsed by musicians who would not recom- mend any course that did not maintain the highest musical standards. It is for beginners or experienced players, old or young. You advance as rapidly or as slowly as you wish All necessary music is supplied without extra charge. A diploma is granted. Write today, without cost or obligation, for 64-page free booklet, ‘‘How to Learn Piano or Organ.” FREE BOOK How To Learn Piano QUINN CONSERVATORY, Studio PM 46, 598 Columbia Road, Boston, 25, Mass. Please send me, without cost or obligation, your free booklet, “How to Learn Piano or Organ,”’ and full particulars of your Course and special) reduced Tuition Offer. Name Address 242444 4S 4488

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10 Course in Two Years! You Want to Earn Big Money! And you will not be satisfied unless you earn steady romotion. But are you prepared for the job ahead of you? Jo you measure up to the standard that insures success? For a more responsible position a fairly good education is necessary. o write a sensible business letter, to prepare estimates, to figure cost and to compute interest, you must have a certain amount of preparation. All this you must be able to do before you will earn promotion. Many business houses hire no men whose general knowl- edge is not equal to a high school course. Why? Because big business refuses to burden itself with men who are barred from promotion by the lack of elementary education Can You Qualify for a Better Position? We have a plan wheecby you can. We can give you a com- plete but simplified high school course in two 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 DO IT. Let us show you how to get on the road to success. It will not cost you a single working hour. We are so sure of be- ing able to help you that we will cheerfully return to you, at the end of ten lessons, every cent you sent us if you are not absolutely satisfied. What fairer offer can we make you? Write today. It costs you nothing but a stamp. AMERICAN SCHOOL Dept. H-A74, Drexel Ave. and 58th St., Chicago

POPULAR MECHANICS ADVERTISING

SECTION

BY DOING Every phase of all branches of ELECTRICITY Taught by Actual Practice In America’s foremost and oldest institution for trade training No Books Used Individual Instruction Start Any Day A SPECIAL and SEPARATE Course in Ignition, Auto Lighting and STARTER Sys- tems. Write for FREE 64- page catalog. THE NEW YORK ELECTRICAL SCHOOL 44 West 17th Street NEW YORK CITY

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BY MAIL at home—spare time— KES and Become an Auto ih eM idee eX pert on repairing MANIKINSE and electrical systems. DYKE’S SCHOOL OF MOTORING, Box 300 Granite Bidg., St. Louis, Mo. wiTH A department of the Firm: A.L Dyke, Publisher. Origina land only system o! its | indorsed by leading motor authorities of the world Booklet

Complete Conservatory urse by Mail Wonderful home study music lessons under great American and European teachers. Endorsed by Paderewski. M aster teachers guide and coach you. Lessons a marvel of simplicity and completeness Write naming course you are interested in Ewane, Harmon Voice, Public School Music, fella, Cornet, Py njo or Heed Organ---and we will sen University Extension Conservatory, 621 Siegel-Myers Bldg., Chicago AnyInstrument iolin, Cornet, Mandolin, Guitar 3. t

Send for our free lesson which shows how easily you can master Drafting by the Chicago ‘‘Tech’’ Method and pr: pare for a high salaried job. You get FREE Lesson ; .-.- Automobile Easincee. & «-- Architect $5 000 to $15,000 iding tract 4,000 te $10,000) .-.-Automobile Repairman $2.500 to $4,000 «+-Civil Engineer $5,000 to $16,000 --. Structural Engineer ---Basiness Manager _ $5,000 to $15,000 -».Certified Public eprcunten t ,000 to $15,000) .. Explain how I can qualify for positicn checked: $5,000 to $10,000) ...Employment Manager $4,000 to $10,000) ..

---Accountant and Auditor $2,500 to $7,000 ---Drafteman and Designer j $2,600 to $4,000 ..-Elortrical Enginee r $4,000 to $10,000 ---Gereral Education In one year. & Name ...-High School Graduate . Lawver ,000 to $15,000 -Mechanical Enshicee $ Shop Supert — a. ou” intenden re $3,000 to $7,000 $4,000 to $10,000 .. Steam Engineer $2,000 to $4,000 -Foreman’s Course } tae Engi $2,000 to $4,000 . Sanitary neer _ $2,000 to $5,000 -Telepbone Engineer $2,500 to $5,000 ..- Telegraph Engineer $2,500 to $5,000 n two years .-Fire Insurance Expert $3,000 to $10,000 Address.

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AVIATION Information Send us your name and address for full information

spare time, to quality. | plane Industry” aise sent free if you answer at once. Aviation =< Airplane Y\ Find out = = - how re home, opportunities now open , de we rion se ontn the Alr- FREE many gre* AMERICAN SCHOOL OF AVIATION 3601 Michigan Ave. Dept. 119-A

regarding the during CHICAGO

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oa!) >» ieee —~- Pr re reat ring Alr- Go POPULAR MECHANICS ADVERTISING SECTION 11 o You Want A Bigger Salary? It doesn’t matter what you are Today or what you were Yesterday. Tomorrow is your bright, clear day of Opportunity. Nothing can keep you down if you really make up your mind to go up. Maybe you've gotten a bad start. Perhaps you haven’t had a decent raise in years. Or perhaps you are among those thousands who have had their wages cut—or have been thrown out of a job. But you aren’t going to curl up and quit, are you? Right now, when trained men are in such demand, you've the best chance you ever had to get out of the rut and do something worth while. But you’re “too old to start over,” you say. Nonsense! When some of the big men of this country were your age, they weren’t earning half what you are getting today. But they didn’t quit. They worked! They studied! They learned to do some one thing well. At 35, Henry Ford was working in the me- chanical department of the Edison Electric Light & Power Company. At 38, John R. Patterson, who founded the National Cash Register Company, was the proprietor of a small and none too successful country store. At 25, George Eastman, president of the Eastman Kodak Company, was a bookkeeper in a savings bank. At 22, Edison was a roaming telegraph operator—out of a job—too poor, when he arrived in New York, to buy his own breakfast! Forget what you are today and decide on what you want to be. No man has failed until he admits it to himself. And no real man ever admits it. Why, man, in just one hour a day— in the spare time you will never miss—you can fit yourself for a better job and a bigger salary. What Do You Want To Be? An Automotive Engineer? The vice-presi- dent in charge of engineering of the Packard Motor Car Company is an I. C. S. student. A Ship Builder? The world’s greatest ship builder is an I. C. S. student. An Architect? The Equitable Building in New York, and many others were built by I. C. S. students. An Engineer? An I. C. S.-trained engineer has just written to us that his income has been increased to $25,000 a year. Do you want to advance in Business? In Advertising? In Salesmanship? Many of the country’s foremost Advertising and Sales Managers have won success through I. C. S. training. Accounting? Commercial Law? All over America, bookkeepers, accountants, office managers, private secretaries, are reaping the rewards of time invested in I. C. S. training in these subjects. Do these positions sound too good for you? Are you afraid to take the same chance these men took—and get the opportunity to make good as they did? They were in worse jobs than yours. Some of them had no schooling beyond a few grammar grades. But they for- got about what they were—and they thought about what they wanted to be. Get out of the rut, and get out today. You've got it in you to make good in a big way, if you will only learn to do some one thing well. Your Chance Is Here! No matter where you live, the I. C. S. will come to you. No matter what your handicaps, or how small your means, we have a plan to meet your circumstances. No matter how limited your previ- ous education, the simply-written, wonderfully-illus- trated I. C. S. lessons make it easy to learn. No matter what career you choose, some one of the 300 I. C. S. courses will surely suit your needs. When everything has been made easy for you— when one hour a day spent with the I. C. S. in the quiet of your own home will bring you a bigger in- come, more comforts, more pleasures, all that success means, can you afford to let another single priceless hour of spare time go to waste? This is all we ask: Without cost, without obligating yourself in any way, put it up to us to prove how we can help you. Just mark and mail this coupon. _——— = — — — TEAR OUT HERE — — — — — — — - INTERNATIONAL CORRESPONDENCE SCHOOLS BOX 5639-( SCRANTON, PA. Without cost or obligation, please explain how I can qualify for the position, or in the subject before which I have marked an X: ELEC. ENGINEER BUSINESS MANAGEM’T Electric Lighting & Railways SALESMANSHIP Electrie Wiring ADVERTISING Telegraph Engineer Show Card & Sign Ptg. Telephone Work Railroad Positions MECHANICAL ENGINEER ILLUSTRATING Mechanical Draftsman Cartooning Machine Shop Practice Private Secretary OoODon0oRoo Toolmaker Business Correspondent (}) Gas Engine Operating BOOKKEEPER [J CIVIL ENGINEER Stenographer & Typist [}] Surveying and Mapping Certified Public Accountant (] MINE FOREMAN or ENG’R TRAFFIC MANAGER LJ] STATIONARY ENGINEER Cost Accountant () Marine Engineer GOOD ENGLISH L) ARCHITECT Common School Subjects Contractor and Builder Architectural Draftsman Concrete Builder Structural Engineer PLUMBING & HEATING Sheet Metal Worker Textile Overseer or Supt. CHEMIST Pharmacy CIVIL SERVICE Railway Mail Clerk AUTOMOBILES Mathematics Navigation AGRICULTURE Poultry Raising [ French Airplane Engines (J Spanish WIRELESS LJ) Banking OOOOOoOoDDoOoOoOoooDODODODOOUUUL sagan neae Name peenassevecs Street 2-1-22 and No. City oes ‘ . .... State OCCUPBUUOD........2.0.0. 0. ceeeeecceeecnenee Persons residing in Canada should send this coupon to the Interna- tional Correspondence Schools Canadian, Limited, Montreal, Canada

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2 POPULAR MECHANICS ADVERTISING SECTION DoYouLiketo Draw? Here Is a Simple, Easy Way | to Draw a Comic Face Make a square with pencil, Pencil as shown in the small squares above. all pencil guide lines after the drawing is completed. then add to it with Erase We will not give you any “grand prize,” if you draw this picture. Nor will we claim to make you “rich in a week.” But if you are anxious to develop your talent with a successful cartoonist, so you can make money, send a copy of this picture with six cents in stamps for portfolio of cartoons and sample lesson plate, and let us explain more in detail. Some of the most successful cartoonists are former students of this school. It is not hard to learn to draw orig- inals when you are shown how in a practical way. = THE W. L. EVANS SCHOOL OF CARTOONING “The School That Has the Reputation” 821 Leader Bldg. CLEVELAND, OHIO SEND NO MONEY Justa postcard. I willsend youmy new, complete, revised course in CHARACTER READING— PSYCHO-ANAL YSIS for five days’ free examination Most lucid, practical instruction on this subject. 50 years’ experience put into this course. Shows you how to read character—to “‘size others up,”’ to KNOW YOURSELF Fight persons out of every ten are in the wrong job, are you? For what are you best fitted? Can you overcome your weak points? Are you easily dis- couraged? Are you getting on? BE MASTER OF YOUR DESTINY instead of its victim! Overcome your failings, dor nate circumstance. Get the job you want at the salary that’s right! THROUGH MY CHARACTER READING COURSE secrets are revealed that took me a life-time to penetrate. Your hidden powers are developed your influence made vital, you find what type of persons to cultivate as friends, what type to avoid what type you should marry. ON APPROVAL This lavishly illustrated Course, with photographs diagrams and charts, showing types, characterist and composite, with their traits; the significance of wrofile contour, the concave, convex and plain, and ->ERSONAL SELF-MEASURING EFFICIENCY CHART ANALYZING YOUR OWN CHAI ACTER, all this sent for 5 days’ examination fre« If not satisfied, simply return it tome. When, how ever, you realize that the Course can be a tur! point in your career, then remit $2.00 which pay the Course IN FULL (no extra charges of any } and secures also personal instruction privilege { an analysis of your own character FREE. Address PROF. HENRY DICKSON 1041-K Chicago Ave. Evanston, Ill. Complete Vacuum Tube Radio Set FREE With PROFESSIONAL COURSE 3 EST Theory, Instruments, Text Books, Service HENRY DICKSON m- t aw on Me ory Training and Principal Dic! jemory School Also Complete Course for Amateurs Send for Free Booklet NEW YORK WIRELESS INSTITUTE 258 Broadway, New York Dept. 700 Wonderful, new device, guides your hand; corrects your writing in few days. Big improvement in three hours. No failures. Com- plete outline FREE. Write C. J. Ozment, D-34, St. Louls, M TRI STATE COLLEGE OF ENGINEERING Makes you a Civil, Mechanical, Electrical or Chemical Engineer in two years, 48 weeks each. No entrance examinations. H School Diploma not required. Compact courses made u; essentialsonly. Expenses low. For cateiog address 100 *“*M’’ STREET, ANGOLA, IND. 40.000 Opportunities in Hotels Nation wide demand for high saiaried men and women; past exper!- ence unnecessary; we train you by mailand put you in touch with big opportunit Big pay, fine living, interesting work , quick advancement ; permanent. Write for Free Book, “Your Bi LEWIS HOTEL TRAINING SCHOOL, Room 328, Washington, D. C By note orear. Withor without music. Short Course. Ad beginners taught by mail. No teacher required. Self-Instr tion Course for Advanced Pianists. Learn 67 styles of Ba 180 Syncopated Effects, Blue Harmony, Oriental, Chime, M and Cafe Jazz, Trick Endings, Clever Breaks, Space Filler Slurs, Triple Bass, Wicked Harmony, Blue Obligato, and 4 other Subjects, including Ear Playing, 110 pages of REAL Jaz 25,000 words. A Postal brings our FRE® Special Offer ; | Waterman Piano School, 259 Superba Theatre Bldg., Los Angeles, Cal

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r Free POPULAR MECHANICS ADVERTISING SECTION 13 “Big men are only little men given a fair chance to grow.”—J. Ogden Armour troduces Band-Saw to Box-Car —Wins $6,000 Job! “Lucky chap!’’—that’s what they’re saying about John Erie. - a short time ago Erie was tied to a humdrum job in the general offices of the ‘‘Continental.”’ Now he sits at a big mahogany desk and swings a $6,000 position. Here’s the story, true in all particulars except the names. Under the Problem Method you @ill work to all purposes side by side with trained traftic men, handle the very problems met daily by the traffic directors of the railroads and by the big shippers. They will answer every question you ask, make every point clear, direct your training every step of the way. You will cover, under their instruction, the entire field of traffic, including the organization and administration of a traffic department, freight classification, rates, claims, law of Carriers, procedure before the Inter- One of the “leaders” in the Con- tinental line was a band-saw. The utfit weighed only 780 pounds, but it was a rangy affair, too big to get thru the door of a box-car: it had to be shipped on a flat-car. Strange, but it had never seemed to occur to anyone to find out whether it would be cheaper to ship the machine in a box-car—or whether the design of the machine could be changed in some simple way so as to permit of such shipment. But it occurred to John Erie. Erie, you see, was studying Traffic Management in his spare time, and he had learned that when shipped on a flat-car—according to the classifica- tions of the Interstate Commerce Commission—the band-saw had to be Just a short time ago he was tied to a humdrum tion in One.”’ state Commerce Commission, ex- press service and rates, ocean traffic and trade—even to the point of work- ing with the actual forms, agreements and contracts in everyday use. Send for ‘‘Skillful Traffic Management’’ No need to urge you to act—not if ou’re real executive timber. You dee that the thing to do is to get the facts. They are contained in aa interesting booklet, “Skillful Traffic Management.’’ The coupon will! bring this to you without obligation, to gether with details of our ne payment plan; also your copy of thz inspiring book,"’Ten Years’ * hn “Get this boo zx, said figured as weighing a minimum of job —out in the general office. Now he sits at a a prominent Chicago executive, even 1,000 pounds—more than five times wtual weight! Erie recommended that the frame be cast in parts and bolted tovether. Thus it could be readily “knocked down” and loaded thru a box-car door. The change was made—it saved his company $6,000 a month —and John Erie stepped into the job of Traffic Manager, at a salary to start of $,000a year. Business Needs Competent Traffic Managers— Pays Them Well Just an unusual opportunity, you say—with Erie on the job to take advantage of it. Don’t you believe it! Millions of dollars, literally millions, are being wasted every year by the big shippers, just for lack of really competent trathic managers. We know of a former rate clerk, for example—a LaSalle- trained traffic man—who recovered for one of the big packers more than $200,000 in cash, simply by proving a correct rate of 51.53 a hundredweight on certain shipments as against the rate of $1.60 which the company had been paying. Men whocan effect such savings are in demand. Large in- dustrial concerns, railroads, chambers of commerce and boards of trade are actively bidding for their services. Such men com- mand big incomes. Salaries of $5,000, $7,500, $10,000 and up are not unusual. The rate-clerk just referred to promptly won ad- vancement. He is now traffic manager for the largest cement company in the world. Train by the Problem Method Why content yourself with the slender earnings of the routine man, when right in your own home by the LaSalle Problem ethod you can quickly prove your title to the big mahogany desk? big mahogany desk and swings a $6,000 position. if you have to pay five dollars for it.’ We will send it free. Mark—Sign— Mail the coupon—NOW. a_ee— JVOUIRY COUPON = oo = LaSalle Extension University Dept. 664-TR Chicago, Ill. Please send me catalog and full informa tion regarding the course and service I have marked with an X below. Also a copy of your book, ““Ten Years’ Promotion in One,” all without obligation to me. Oo Traffic Management— Foreign and Domestic: Training for position as Railroad or Industrial Traffic Manager, etc. ‘ Other LaSalle Training Courses LaSalle is the largest business training institution in the world. It offers training for every important business need If more interested in any of these courses, check here: O Business Management O Banking and Finance DO Salesmanship O Modern Foremanship O Higher Accountancy and Production Methods O Railway Accounting and O Personne! and Employ» Station Management ment Management O Law— Degree of LL.B 0 Expert Bookkeeping O Commercia! Law O Business English O Industrial Management a Commercial Spanish Efficiency 0 Effective Speaking © Modern Business Corre- OC. P. A, Coaching spondence and Practice ee Present Position Address ..... LaSalle Extension University The Largest Business Training Institution in the World

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14 t POPULAR MECHANICS ADVERTISING SECTION Have 5000 Learn Radio Free For Sweeney Trained Men So confident am I of the practical training that is offered you in this Million Dollar trade school that if you will agree to take the necessary preliminary work, I will agree to employ you upon graduation. This position requires not only automotive training, but radio training as well. But to equip you for this work I will give you a free course in radio. Furthermore—I need you NOW, and to make it possi- ble to get the right sort of men I WILL PAY YOUR RAILWAY FARE TO KANSAS CITY. | Want Sweeney Trained Men to act as my salesmen and representatives to sell radio sets, storage batteries, accessories, etc.—to open garages, tire shops in 5000 places where | am opening sales branches. E. J. SWEENEY Sweeney Trains You To Fill Positions Like These Chauffeurs $90.to 150. Truck diner wine: You ey Ualcamiger 100 to200. st Whrldars $(40.to 200. ne ly Now Bationy Mam $150-to 200 Bie npn dy for PROFIT PANT tg j $6.to10.aday ABLE. EMPLOYMENT after Auto Electrician . PP bo H eight weeks’ training write me today. Do not delay—for this opportunity may not occur Tradtor Enya $10 0 again. For when these jobs are filled I cannot offer ‘ such employm nt agreement any longer. Garage 150 to40 amd This is the _ time I have been able to GUARANTEE A JOB And I can only guarantee a certain number. But you can b« Saleaman S150 to 500 one of those who take training UNDER MY GUARANTE! OF EMPLOYMENT IF YOU ACT NOW. Please do not apply unless you are willing to take eight w>eks course of training. LEARN A TRADE If you are mechanically inclined and want an assured position write me today for a sample contract. I will make this offer only to those who are sufficiently in earnest and sufficiently en- ergetic to write me at once. Naturally, I will employ only Sweene) trained men. For fifteen years I have trained young men mechanically inclined

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POPULAR MECHANICS ADVERTISING SECTION 15 Jobs Open Now BRANCH MANAGERS WANTED! You have heard of RADIO? Do you know about the new business that is taking the world by storm? Do you realize the opportunities in this business? What it means ‘o handle and install radio sets? To act as salesmen. Why, one man last week vot orders for over $2,000 worth of radio supplies—everybody wants to hear the voices in the air. Let ie tell you about the opportunities in RADIO. Remember my RADIO COURSE IS FREE. Not a ent extra charge. Probably you have read my advertising before. But this is a spécial offer. I want 5000 go-getters. Give ourself a real training. If you will qualify I WILL HIRE YOU. If you are in earnest write me today. | Pay Your Railroad Fare This training takes in NOT ONLY the sweeney System of Practical Instruction which was endorsed by LEARN A TRADE he Government during the War in turning out over 5000 auto echanies, and which has put 46000 men into the auto business n civil life, but INCLUDES without a cent’s extra cost the new Now is the time for you to learn a trade. I teach men to be successful auto mechanics. Can REE RADIO INSTRUCTION and my new offer to PAY you make a tire? Can you weld a OUR RAILWAY FARE to Kansas City no matter where broken crank case? Can you build ou live. a battery? Can you repair an auto- mobile? Can you go anywhere in | the U. S. and get a job in a garage, Get My Big Free Catalog repair shop, auto agency, tire shop, one . : ; welding concern? Can you get a FREE rhe first step is to send me the coupon or write a job as a driver of cha"ffeur? posteard for my 72-page illustrated catalog. It all about this Million Dollar trade school. It tells how to up yourself for a real job. It tells how thousands of men just vou, without any special knowledge but simply a liking for echanies, MADE A LIFETIME SUCCESS as a result of iY SSS" his simple training. I don’t care how old you are. I don’t ty, ‘AA YJ S This FREE Book Tells You ire how small your education, for I teach with TOOLS \OT BOOKS. It tells also about this new radio busi- Ly How to make money. How to make your own sets. hy) VAY 5 It s about the school and our big swimming pool and how dents enjoy themselves whilelearning. It gives you in the ih n words of hundreds of men just what they learned here wh" i what they have donesince graduating. And my special 49) ffer. This isnot in the catalog. But I have big plans. iy ed 5000 salesmen and representatives to handle Ai eeney batteries and radio supplies. I want man- ry ers for branch offices. I will Bire you if you are fy itt arnest and will qualify. And if you write me fy ( - 7D 7 A\) —— Op vi * Scr I will send you SAMPLE CONTRACT. /\ La ! if you are willing to go to work I WILL PAY YOUR RAILWAY FARE to Kansas ¢ Write me NOW. EMORY J. SWEENEY, President. ORY J: SWEENEY, President 1023 Sweeney Bldg., Kansas City, Mo. Send me your offer of a guaranteed position, your big free catalog and full details of the Sweeney eight weeks’ course leading to an immediate money-making oppor- tunity. For Big Offer and Catalog Mail this «sy Nattic ee ccceee cere eet Coupon Today SD Se 0 OS Re a ee \O COLORED STUDENTS ACCEPTED

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UBRARY PASTE FREE! This Ad-Writer’s Wonderful Working Outfit Yes, FREE to you, acomplete Ad-Writer's Working Outfit! Not a penny to pay. You

Alli These

get this superb outfit as a FREE gift on our sensational new offer. We want to Articles interest 5,000 more men in the great pro- FR EE fession of ad-writing. The ‘‘field’’ needs more ‘ood men and needs them badly. We want to 1 Drawing Board nterest 5,000 men quickly in the opportunity— a4 enare hence this amazing free offer. The 5,000 ad- 2 Dra Pencil —— —- will go i | gs = action A Double Line Rul- ecessary if you want one free. i “se today for full details. OSs MME SONPOD | 2 Sinaie Line Rut- $200-A-Week Ad-Writers Use The Same Tools These are, real ad- ' - writers’ ‘‘tools’’— 1 Ad Rule the ere came kind used vy the men who are ; Sader retting , $300 a week. There’s inspira- oe ay ergs gy instruments. Yoo work at - oe ‘ou st. “*Jus e thing’ say successful ad- | SO Sheets of Paper writers, ‘to start ad-men off right.” i Gre LEARN TO WRITE ADVERTISEMENTS

Ad-writing is the best paying profession in the world. Statistics prove it. One ad-writer, formerly a bookkeeper makes over $1,000 a week. Another, an ex-shophand, earns over $200 a week. Scores step right into Ad-writing from other lines. No special ‘‘gift’’ required—just common sense plus some training. Let Page-Davis experts train you —by mail. Learn in your spare time how to lay out and write that “‘ring the bell.’’ y Mail the eougen for our ee ee ee OW >? FREE Ad -writer’s working outfit offer. ie Don’t delay--thousands will speak for one of these outfits. Only 5,000 to be given free. Get the coupon in the geile today. It brings also WV Free Coupon Page-Davis School a-i8 CHICAGO , ILLINOIS I want an Ad-writer’s working out- fit free. Give me the details of this offer and also particulars of your course in Ad-writing. This places me under no obligation, information on the famous Page-Davis Course in ie ing-- fi Shestes acl Now.” Page-Davis School Dept. A-18 7 Street and Number ..................... Please Mention Popular Mechanics | POPULAR MECHANICS ADVERTISING SECTION

Study YOURSELF—and promotion, more money and steady employment are certain. We help you “find’”’ yourself in the field where you fit best. We analyze you and assist you with our free em- ployment service. Ask for the free booklet ‘‘Self- Appraisal” and learn how you can insure advance- ment and a better job Want a Better Job? Vocational Service Corporation 116 S. Michigan Ave., Chicago BRUSHES int SUPPLIES Dept. (61)

, —_ . a | Zz j . Largest sign shops and_ studios use BLUE HANDLE BRAND brushes and supplies. The PtO- NEERIine Established 1899. Recognized Quality Tremendous purchasing power, and long years of practical experi- ence, permit us to offer the highest quality supplies at the lowest prices. Thos Cusack Co. of Indianapolis, write: “W offer you the highest recommendation for your goods.” Write for our new 1922 catalogue .Jt's FREE DETROIT SCHOOL OF LETTERING, 1186 D. S. of L. Bidg. SUPPLY DEPT., Detroit, Mich., U. S. A. C netsHOW OD ) vk J Ee

Chas. J. Strong © ounder

_———

» AD ENGRAVING Earn while learning. Most practical watch school Individual instructions. Graduates in great demand. Book free Chicago School of Watchmaking, Dept. 20, 4840 Lincoln Ave., Chicago

BIG PROFITS FROM POULTRY We Teach You How; Easily Learned at Home; our guaranteed methods make success &_ ; certain; write for free book Ve? <23, lets “How to Raise Poultry SS for Profit’? and “Absolut —— — ” ) — Evidence. Free. The National Poultry Institute, Inc.,Wsshington D.C. ye . . * « WORK hile Learning Electricity —GET OUR FREE OFFER S & H Electrical Works °°°* ¥ 3,302 5-S°°°" ** LEARN WAT CHMAKING 4 we) STATEMENT OF THE OWNERSHIP, MANAGEMI p CIRCULATION, ETC., REQUIRED BY THE ACT OF Ct GRESS OF AUGUST 24, 1912, of Popular Mechanics Magaz published Monthly at Chicago, Ill., for April Ist, 1922. State of Illinois, County of Cook, es Before me, a notary public in and for the state and county aforesaid, per appeared H. H. Windsor, who having been duly sworn according to law, depos says that he is the editor and business manager of the Popular Mechanics Mas and that the following is, to the best of his knowledge and belief, a true statement

ownership, management, etc., of the aforesaid publication for the date showr above caption, required by the Act of August 24, 1912, embodied in section 443 Laws and Regulations, printed on the reverse of this form, to wit: 1, That the and addresses of the publisher, editor, managing editor, and business 5 Publisher, Popular Mechanics Co., 6 } Michigan Ave., Chicago, Ill

Windsor, 6 No. Michigan Ave. cago, Il, Managing Editor, J. L Michigan Ave., Chicago Ill, Business Manager, H. H. Windsor, 6 N« P Chicago, I. 2. That the owners are (Give names and addresses of individua or, if a corporation give its name and the names and addresses of stock holder or holding 1 per cent or more of the total amount of stock}: H. H. Windsor, 6 N gan Ave., Chicago, Ill., L. B. Windsor, 6 No. Mic higan Ave., Chicago, Ill., Fir and Savings Bank, Trustee H. H. Windsor, Jr.. Chicago, I. 3 known bondholders, mortgagees, and other security holders owning or hold cent or more of total amount of bonds, mortgages or other securities are |i! t none so state): None. That the two pecagraphs next above, giving t of the owners, stockholders and security holders, if any, contain not only t stockholders and security holders as they appear upon the books of the coms also, in cases where the stockholder or security holder appears upon the book company as trustee or in any other fiduciary relation, the name of the person or tion for whom such trustee is acting, is given; also that the aaid two parsgrar statements embracing affiant’s full knowledge aud belief as to the circumst conditions under which stockholders and security holders who do not appesr books of the company 4s trustees, hold stock and securities in a capacity that of a bona fide owner; and this affiant has no reason to believe that any o association, or corporation has any Speeeent direct or indirect in the said st oth v han as 60 stat »y him. or other securities than a H. WINDSOR, I H. Sworn to and subscribed before me this 27th day of March, 1922. th J. GRAHA (My commission expires June 17, 1924.) Nota

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id ey nt ou Id Ve ist n= lf- »W e. rb yn go Bids. D.C. — icity FER en St. school. Book free. , Chicago POPULAR MECHANICS ADVERTISING SECTION 17 You Might Call It Luck If Only One Man Had Jumped to Such Amazing Earnings -but Hundreds Have Done It! HEN a man steps from a $50 a month job / as a farmhand to a position that paid him $1,000 the very first month—was it luck? When another man leaves a job on the Capitol Police Force at a salary of iess than $1,000 a year nd then in six weeks earns $1,800—is that luck? Probably the friends of Charles Berry of Winter- set, Iowa, and of J. P. Overstreet of Denison, Texas—the two men mentioned above—call them lucky. But then there is F. Wynn of Port- land, Ore., an ex-service man who ~arned $554.37 in one week — and George W. Kearns of Oklahoma City, whose earnings went from $60 a month to $524 in two weeks. And C. W. Campbell of Greens- burg, Pa., who quit a clerking job Last week my > P amoun tec to E = , $554.37; this week on the railroad to earn $1,562 in vill go over $400.""— in. Portland, thirty days. There is nothing exceptional bout these men. They live in all parts of the ountry—they had been engaged in all kinds of ork. Many had been clerks, bookkeepers, me- hanies. Some had already achieved successful places in the business world. "i No Limit to the Opportunities \nd then in one swift stroke, they found them- lves making more money than they had ever eamed possible. The grind of routine work—the nstant struggle to obtain even a slight increase in rnings—the discouraging drudgery of blind-alley all this was left behind for careers of immediate and lant success. And great as are their earnings today, they looking forward to increasing them constantly—in fact, there is no limit to the amounts they may earn—only their own efforts can de- termine that. The remarkably quick success of these men sounds like luck—the sheerest kind of luck But of course it cannot be that—not when hundreds have found the way to such amazing good fortun —all through the same method. There must be a definite, practical, workable plan behind their sudden jumps to big earnings The Back-Bone of had never earned ! than .$60 a nth. Last week I ; ed $306 and this Business $218." — Geo. And there is. In the first place 4 oe d ‘ st place they By sa Okla- discovered a vital fact about business yea _ They discovered that the big money is the Selling end of business. Salesmen are the very life blood iny concern—upon them depends the amount of profits mad« \nd for the men who are in the “‘Star’’ class—who are Mas- rs of Salesmanship—there is practically no limit to their irnings. . And that is how the men whose pictures you see and hundreds others like them, found the way to_their present magnificent omes. They are all Master Salesmen now! New Way to Enter This Field Yet previously they had no idea of becoming Salesmen— many didn’t even think it possible to do so. But they learne« of an amazingly easy way by which any man can quickly become a Master Sales- man—and in his spare time at home! Secrets Only Master Salesmen Know Salesmanship is not a natural gift— it is an art and science that is open to any man. There are fundamental rules and principles that anyone can put into practice—there are Secrets of Selling that put any man who knows them into the “‘Star’’ class “The very first The proof of this is in the wonderful] month I earned success achieved by men who, without — . bot +e any previous Selling experience, have “"“t}, setae tam suddenly become Master Salesmen thru Winterset, lowa ; the National Salesmen’s Training Asso- ciation Step by step—in their spare time at home—they were taken through every phase of Salesmanship Every underlying princip!e of sales strategy was made as simple as \-B-C Thru the National Demonstration Method every form of Sales proble m is solved Startling Proof Sent Free Whether or not you have ever thought of becoming a Salesman, you should examine the facts about the tremendous possibilities for big earnings in this fascinating field Read the extraordinary stories of others and see how easily you can do what they are doing. The PROOF is so overwhelming that it may mean the turning point in your life, as it has in so many others “After ten years in the railway mail Simply mail the — below It will service I decided to bring you by mail the whole wonderful make a change story, and in addition a great Book My earnings dur- ‘“\fodern Salesmanship” and full particu- a. =, lars about the remarkable system of than $1.000."—W. Salesmanship Training and Free Employ- Hartle,Chicago, Ill. ment Service of the N. 8. T. A Right now—tear off the coupon and mail it today. It costs you nothing to do this—it obligates you in no way National Salesmen’s Training Association Dept. 12-G CHICAGO, ILL. NATIONAL SALESMEN’S TRAINING ASSOCIATION Dept. 12-G, Chicago, III. Please mail me Free Proof that I can become a Master Salesman and qualify for a big money position. Also send your illustrated Book ‘Modern Salesmanship” and partic- ulars of membership in your association and its Free Employment Service. This is all free of cost or obligatior Name Address City Sate Age ccupatior

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18 POPULAR MECHANICS ADVERTISING SECTION LEARN CARTOONING If you like to draw, de- velop your ability and quickly raise your income Hundreds of others who had the same ambition have become successful cartoon- ists through the Landon teaching cartooning. They are now earning from $75 to $400 and more perweek. The Landon Course of Cartooning with the famous Landon Picture Charts teaches you how to make original drawings. As your eye follows sketch after sketch on these charts, you learn just how and where to start a drawing and place each line in completing it. 3 You can learn during . your spare time, at home —and a personal criticism service on each lesson cor- rects mistakes which you may make. Celebrated cartoonists and educators everywhere pro- nounce Landon Picture Charts as the greatest achievement in the teaching of drawing. No other plan gives you such a thorough understanding of the funda- mentals of drawing—none develops originality so rapidly. The opportunities in cartoon work were never so great as at present. Write today for sample Landon Picture Chart, long list of successful Landon students and full informa- tion showing the possibili- ties for you. Please state your age. “Che Landon School 338 National Bldg. Cleveland, Ohio Picture Chart Method of | we CO A i eid I oe a ¥ s I Teach by Mail / [ CAN make a good 8 penman of you at your home during spare time, a 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 eam and will do the same for YOU! Beautifully Illustrated Book “How to Become a Good Penman” It contains general infor- or FREE t mation, with testimonials and beautiful specimens of penmanship showing what others have accomplished by the Tamblyn System. (Your name clegantly written on acard Uf you on close stamp for postage.) WRITE TODAY. Address F. W. TAMBLYN 418 Ridge Bidg., Kansas City, Mo., U.S. A. How to Box 40 By Terry McGovern, Cc ames J. Corbett, J. Gardner Smith, M. D., Arthur P Keeley and Gus. E. Keeley. How to Box to Win, How to Build Musc'« How to Punch the Bag and How to Stan Walk or Run. This interesting book written by exp« is known also as ‘‘ The Book of Health and Strength.’ It will greatly assist everyo: in keeping fit, in putting them in condits to master a strenuous undertaking eith: physica! or mental © 3illustrations. Size 444x744 in. Paper copy . 135 page SHREWESBURY Pure ese co S525 West Lake S . How TO BOX: eRe: SAXOPHONE, or TENOR BANJO in 20 JAZ Christensen Schools in most cit or Learn by Mail. Write for Bookiet money-making teacher's opportunity. | AXEL CURISTENSEN, 16 E. Jackson, Chicago, !!! | WANTED! . S\U.S. RAILWAY MAIL el ' heard ee $190 # FRANKLIN oe one TITUTE te , = Set. D178, Rechester, N.Y 7 diy send me,by return ma!!,!' é pT telling how I can q ly get into the U. 8. Gov't ser’ Hundreds Railway Mail Clerk ($1600 to $2 Needed year) or as City Mail Carrier or 1 y Office Clerk ($1400 to $1800 a year f Name a oe ys £ Address

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—<—$— POPULAR MECHANICS ADVERTISING SECTION

Become a Radio-trician Learn at home the greatest profession of to-day and the future. Become a master of i aie instal- a ti lation, operation, maintenance, repair, mechanics, design, inspection, sal hi HE world is aflame with Radio. Never before in the history of the country has an industry leaped to the forefront as rapidly as this great, new science. Hundreds of thousands of radio receiving sets are in operation— tens of thousands of sending stations will be erected—and this enormous craze is permanent. Even to-day manufac- turers are months behind their orders! Improvements are being made every day which must increase the demand for radio equipment to even greater proportions than now. Men of foresight, men of vision know what this means. Never before has there been such an opportunity. Radio-tricians are needed to-day everywhere. More and more will be needed as the demand for radio in- stallation, radio operation, radio maintenance, radio repair, radio salesmanship becomes greater and greater. Wherever you go, there are hundreds of radio sets to be installed—wherever you go, thousands upon thousands of dollars worth of radio equipment is being sold—wherever you go, there are radio sets to repair; and if you seek adventure, there are radio sending stations calling to you from ships and land stations all over the world.

v The Pioneer School The National Radio Institute has a record of over 8,000 students. It is.the pioneer school. It teaches every phase of radio from the ground up. It teaches by means of ac- tual practice, actual assembling of a radio outfit, actual operation of radio equipment. It teaches by problem and principle so that National Radic-tricians are in demand every- where. Here is a profession which is paying enormous earnings to men all over the coun- try to-day—a profession that will make hundreds of men wealthy—a profession far more lucrative than that of any other tech- nical or mechanical employment you can secure. What will you do? The world is aflame with radio. What are you going to do to “cash in” on the de- mand for men, for equipment, for experi- ence? Are you going to sit idly by wonder- ing what it is all about, or are you going to make the most of this, the greatest oppor- tunity presented to men of ambition in 50 years. Write at once for the complete catalogue to the National Radio Institute. This is the turning point in your life. Upon your decision this instant may depend your entire future. Mail the coupon, or write a letter NOW—for your own sake! NATIONAL RADIO INSTITUTE, Radio Headquarters Dept. 1085 Washington, D. C. T NATIONAL RADIO INSTITUTE, Radio Headquarters Dept. 1085, Washington, D. C.

| . dy ‘nad a z e } lh s k tel ~ h " | ‘ n becor Radio-t nt g , j | | | Name | | cua See ee iW ame au ae oem ae aoe eee oe oe ==

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20 POPULAR MECHANICS ADVERTISING SECTION Learn Drafting RAFTING offers exceptional opportunities to boys and young men because drafting itself not only commands good pay, but it is the first step towards success in Mechanical or Structural Engineering or Architecture. And drafting is just the kind of work a boy likes to do. There is an easy, delightful way by which you can learn right at home in spare time. For 30 years the International Corre- spondence Schools have been givin boys just the training they need for success in Drafting and more than 300 other subjects. Let the I. C. S. help you. Choose the work you like best in the coupon, then mark and mail it. This doesn’t obligate you in the least, but it will bring you the information that will start you on a successful career. This is your chance. Mark and mail this coupon now. oe ee oe oe oe TEAR OUT HERE — — — — — — = International Correspondence Schools Box 5643-C, Scranton, Penna. Without cost or obligation, please send me complete information about the subject which I have checked below: [] DRAFTING [] BUSINESS L) CARTOONING ] CIVIL SERVICE AUTOMOBILES }] PHARMACY 7 CHEMISTRY C) C) }] ARCHITECT [) ADVERTISING C C) }] BOOKKEEPER GOOD ENGLISH |] WIRELESS ] CIVIL ENGINEER C] AIRPLANE ENGINES ] SAI ESMANSHII ELECTRICITY ACCOUNTING rsu RVEYING Name.......... Address.......... Occupation...... Peraonmg resiauing in Canada should send thia coupon to the Interna tionat Correspondence Schools Canadian, Limited, Montreal, Canadg Please Mechanics Mention l’opuia You won't get fired or laid off if you work for Uncle Sam. When everybody else is worrying about his we: or looking for work, the Uv. Civil Service Employee is ae good, steady pay in a pleasant occupation of his own selection. $1600 TO $2300 A YEAR GUARANTEED Let me train you to pass the U. 8. Civil Service Examination with HIGH RATING 80 you can get a ition QU ICKEST—at $1600 to 2300 guaranteed. I have trained THOUSANDS, and I guarantee you a position, or money back. GET MY FREE BOOK I was Civil Service Secretary Examiner for 8 years a: KNOW how to qualify you in your spare time. My fre book aoupieins everything. Be sure to write postal for NO Get into the Railway Mail, Post Office, Rur ¢ a Departmental, Internal Reve nue, Immigratio Custom House or Postmaster Services right aw ay and stop worrying about money or jobs! Write me now. Arthur R. Patterson, Principal, Patterson Civil Service School, 86 Wisner Bidg., Rochester, N. Y. HOW TO BECOME A PROFESSIONAL PHOTOGRAPHER Earning $35 to $125 a Week An interesting illustrated booklet (fre ; on choosing a vocation, the exc: pt nal opportunities Photography Offers you and how to avail yoursel! of these advantages. Motion Picture—Commerc ial—Portraiture Three to six months’ Practical course. Modern equipment Da or evening classes. Easy terms. Call or write for Catalog N°. 49 N. Y. INSTITUTE OF PHOTOGRAPHY NEW YORK CHICAGO BROOKLYN 141 W. 36th St. 630 So. Wabash Ave. 505 State St -*3,000 SALARIES- are often 44 managers. Numberiess traffic positions pay * to $5,000 per — aks Yeon of dollars are wasted annuaily because of rance of cheaper ways to p to a You can be a traffic expert stop lo make big money for y Thousands ots men e n ed New home stuc dy Act Learn at Home—Book Free !x::2'%: ct quickly mak ( tified Traffic Manager. You can very soon qualify for a salou did t ion. Write quick for big new illustrated book describing this wor = in detail. Write today. Address Dept. 106, 4043 Drexe’ Bivd. American Commerce CHICAGO, HLL TAMME If you stammer attend no stammering schoo !ti! large F REE book entitled “STAMMERING, Its Orig Advanced Natural Method of Cure,’ boundincloth a edin puregold. Ask orspecial: uitionratcand al of “The NaturalSpeech Magazine.” Largest. best and most successfulgchoolin the worldforthe cure ing, stuttering,etc. Nosing-song or time beat. Ww ‘The North- Westero School, 2317 Grand Ave., hilwauk: Wis. ; pmsmor uce this beautiful Violinin your district. Be firs ) to show how easy it is to play with help of three new in\ tions and my scientific instructions. You can play it in one wees *Vielin Paying’ Easy to Learn ®You ean learn as rey as Jperes Surprise your friends. My new inventions make it v easy. Have been teachin: 40 years. Write your name and addrcss_on bottom of page 4! Sénd for free violin offer and three new Violin invention PROF..A. HINCHCLIFFE. 233,Broadw2y

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ure nt Da o No. 49 HY OKLYN State St $7 j At Wis. POPULAR MECHANICS ADVERTISING SECTION 21 FREE RAILROAD FAR LEARN IN THE GREATSHOPS OF EARN IN3% MONTHS Make this the most profitable and enjoyable summer of your life. rt city in the country on beautiful Lake Michigan, and the greatest electrical center in the world “150 °400 A MONTH Come to Chicago, the greatest summer We will pay your railroad from any place in the United States. See the country at our expense And at the same time become a skilled electrica the great shops of Coyne. EARN WHILE YOU LEARN Our Employment Department helps place students in jobs to earn a part or all of their ex- enses while studying. No charge for this service. Hundreds have worked their way through The catalog explains fully. Learn in 32 Months %ks or useless theory. You are trained on $100,000 of electrical equipment Everything from door bells ver plants. You work on motors, generators, house- 1utos, batteries, radio, switchboards, power plants— rything to make you an expert ready to step right into a m paying from $45 to $100 a week Learn electricity the « lectric al center of the world. Here you see the mighty er pl ants the great electrical manufacturers and marvelous t en displays You truly live with electricity in cali Training is Complete whole world of electricity is open to the,;Coyne trained man trained completely He can make big money as Power Operator, Superintendent, Telephone man, Construction auto, truck or tractor electrician, battery man, radio t or he cay go into business for himself as electrical contractor, auto ighition or battery expert and make from $3,000 to a year Hundreds of our graduates today are making ney and you can do the same if you grasp this opportunity ow Send for full particulars today Great Summer Resort City tuated on beautiful Lake Michigan, is the Nation's playground Marvelous boulevards, beautiful parks £ beaches, zoos, lake trips, amusement parks. Coyne is he lake and bathing beach Chicago's daylight saving time ) chance to enjoy these things by daylight One of Chicago’s Many Big Pleasure Boats Radio Course FREE Besides paying your railroad fare we include with your regu course (1) 4 complete course in auto, truck and tractor electricity and storage batteries Greatest outlay of auto electrica and batte ry equipment in the country (2) Complete training in Business Management—trains y: thoroughly to run a business of your own (3) Course in Radio—the marvel of the age installing and operating—build your own set Every student is given a life scholarship—he can stay as long as he likes and return.whenever he likes Greatest Offer Ever Made rhis is the greatest offer ever made by a school a limited time offer withdrawn. SEND COUPON NOW 2:30,» minx send that coupon in right now for our big free catalog and full particulars of this wonderfu offer Constructing and it is for Our departments may soon be filled and the B. W. COOKE, President SOOTHE TRADE & ENGINEERING SCHOOL Dept. 16 39-51 E. IMinois Street CHICAGO, ILL. cc, ~§ B. W. COOKE, Pres. COYNE TRADE & ENGINEERING SCHOOL Dept. 16, 39-51 E. tMlinois St. Chicago, til. Dear Sir Please send me free ur big catalog and full particu ars of your special offer of fre« | railroad fare and 3 extra c«

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bo ) $100.00 a Week He Doubled His Pay and now enjoys the comforts and pleasures of a real income Tv Why not double your pay? Thousands of our students have done it and thousands more will do it. You can be oneof them. Do not think for a moment that it is luck or pull which brings success and real money—far from it. It is prenaring for the big opportunity and knowing what to do when the right time comes that does it. The men who have made successes for themselves were ready when their main chance came, Your main chance, too, will come. Are you ready for it? Remember the Empty Lot? The older fellows were playing ball and you were watching, wondering if you would ever get a chance to play. You knew if you only got a chance you would show them. Sure enough, one day they hollered, **‘Come on, kid, grab a bat!’’ Your chance at the pill had come. That is ‘the way with life. Your chance at the pill will come, but, if you want to stay on the team, you will have to deliver the *goods—and that you can do only if you are prepare od. ae big money and the permanent job go to the man “‘who You Can be the im “Who Knows” We willshow you how. Without loss to you of a sin- gle working hour, we can show youasure way to success and big pay ‘Kleree number of men in each of the positions listed pe om their salaries because of our help. We want to help you, ake a check on the coupon against the job you want and we will help you get it. Write or print your name on the coupon and send it in today. AMERICAN SCHOOL Dept. G-A74 Drexel Ave. and 58th St., Chicago AMERICAN SCHOOL Dept. G-A74. Drexel Ave. and 58th St., Chicago Send me full information on how the PROMOTION PLAN will help me win promotion in the job checked, ove Architect ..Lawyer wine Building Contractor “lies Shop Practice ......Automobile Engineer ..Photoplay Writer osetia Automobile Repairman ...Mechanical Engineer nial Civil Engineer ... Shop Superintendent ‘ ry Engineer “plement Manager “Steam npc exceed Sanitary Engineer Surveyor (& Mapping) Telephone Engineer Telegraph Engineer High School Graduate ire Insurance Expert Bookkee per Draftsman and Designer rical Engineer Electric Light & Power consed General Education te] Address POPULAR MECHANICS Please Mention Popular Mechanics ADVERTISING SECTION | WE TEACH COMMERCIAL ART Properiy Trained a. Earn $100 a week and up. Meyer Both Coilege—a De ppastenent of the Meyer Both Company—offers you s, difke erent and practical training If you like to draw, yy your talent. Study this practical course—taught by the largest and most widely known Commercial Art Organization in the field with 20 years’ success—which each year produces and sells to advertisers in the United States and Canada over ten thousand commercial drawings. Who else ild give you so wide an experience? Commer cial Art is a business necessity—the de mand for commercial artists is greater every year. It’s a highly paid, intensely interesting profession, equally open to bot! men and women. Home study instruction Get facts before you enroll in any school. Get our special booklet, “Your Opportunity”— for half the cost of mailing—4c in stamps. MEYER BOTH COLLEGE of COMMERCIAL ae meng sa Ave. at 20th CHICAGO, int. ‘Free to Writers! WONDERFUL BOOK—read about ~ Tells how easily Storiesand Plays arecon- ceived, written, perfected, sold. How many who don’t DREAM they can write, suddenly find it out. How the Scenario Kings and the Story Queens live and work. How bright men and women, without any special experience, learn to their Own amazement that their sim- 5 paw Ideas may furnish brilliant plots for Plays ™ and Stories. How one’s own Imaginationmay ‘ ide an endless gold-mine of Ideas that me Happy Success and Handsome Casls a Royrities. How new writers get their names } into print. How to tell if you ARE a writer. How to develop your “‘story fancy,"” weave P clever word-pictures and unique, thrilling, fealistic plots, How your friends may be your worst judges. How to avoid discouragement and the pitfalls of Failure. How to win! This surprising book is absolutely free. Nocharge. No obliga- iting fo: ‘Write for it idress ton, THORS? PRESS r you. Ms AUBURN, NEW ¥ YORE aoe by mail to Birds, 553° oi “econ all kinds of birds, animals, fish and game heads, make cugs, tan skins ount your own specimens and ake money preserving for others. Men, Women and boys learn easily ‘and ey. Buccess guarantee. or no tuition rite today tor our woD derful FREE book “Hew to Learn to a Birds an@ Animals. N.W.Schoo! of axidermy, A177 Elwood Bidz eo Ornaba, Neb, > TAMME tER iS posse we Se we -- ee yen! geste — y our natural dividua! lessons. Reed a no soheal “il ye you howe our free booklet, “How To Stop Stammering. SAMUEL A. ROBBINS, D Boston Stammerers’ Institute Ave. Boston , 246 17, Mass. hits um the tune, ~~ rit on. * No tedious ding-dong daily practice— just brief, entertaining lessons which you can master in no time Send for the Free Book. how to start if y musical ability at which friends will marve'. Niegera School of Music Dept. 462, Niagara Falls, 8.. Play p Bo

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POPULAR MECHANICS ADVERTISING SECTION

Price Reduced Down goes the price on these famous Auto Books. We have in- duced our printers and binders tocut the price they charge us. We pass this saving oD to our customers. Mall Coupon Now For FREE Trial

POSITION

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y Put Your Name On This Pay-Roll Men like you are wanted for big-pay positions in the fascinating field of automobile engineering. fit yourself for one of these positions. school. We have made it easy for you to You don’t have to go to You don’t have to serve an apprenticeship. Fifteen auto- mobile engineers and specialists have compiled a spare time read- ing course that will equip you to be an automobile expert without taking any time from your present work. AUTO BOOKS 6 Volumes Shipped Free Now ready for you—an up-to-the-minute six-volume library on Automobile Engineering, covering the con- struction, care and repair of pleasure cars, motor trucks and motorcycles. Brimming over with advanced infor- mation on Lighting Systems, Garage Design and Equip- ment, Welding and other repair methods. Contains everything that a mechanic or an engineer or a motor- cyclist or the owner or prospective owner of a motor car ought to know. Written in simple language that anybody can understand. Tastefully bound in American Morocco flexible covers, gold stamped, 2,650 pages and 2,100 illustrations, tables and explanatory diagrams. A library that cost thousands of dollars to compile, but that comes to you free for 7 days’ examination. Only 10ca Day Not a cent to pay in advance. First you see the books in your own home -

PARTIAL LIST OF CONTENTS More than 1906iue Prints of Wiring Diagrams Explosion Motors Welding Motor Construction and Repair Carburetors and Settings Valves, Cooling Lubrication Fly-Wheels Clutch Transmission Final Drive Steering Frames Tires Vulcanizing ignition Starting and Lighting Systems Shop Kinks Commercial Garage Design and Equipment Electrics Storage Batteries Care and Repair Motorcycles Commercial Trucks Glossary

¢ or shop. Just mail coupon and pay express charges when books arrive. ¢ decide whether you want to keep them or not introductory price of $24.80 has been paid $45.00.) Society. (Regular price $12.) gain offer must soon be withdrawn N Don’t take our word Ow for it. See the books without cost. There is so much profit in this offer for you, e not a moment in sending ¢ —just the coupon. American Technical .¢ Society, Dept,A-!9-A ,¢ @ Reference You can read them and study them for seven whole days before you If you like the books e send only $2.80 in seven days and $3 a month until the special ¢ A-19-A (Regular price ¢ Along with the set-goes a year’s con sulting membership in the American Technical This great ba: o ine a that we urge you to waste @ been eipt af books and the $12 Con 1g Member for the books. Put the @ books and the $12 Consulting M 4 ; Name...... @ Address. oe ¢ # Dept. ¢ ¢ # American Technical 2 Society Send No Money _$ ,“!<2¢° Hinsis Please send me the 6-v @ set, Automobile Engineer ri Gay

within 7 days’ and ‘ slance t $3.00 a month until $24.80 |} aid. Then you send me a re ywing that the $45.00 set J r] are mine and fully paid for coupon in the mails to- g think I can get along without the bo« after the seven days’ trial 1 will return day. Send no money o them at your expense CHICAGO, ILL. eu eeceeseeeeaesenauanane

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° 24 POPULAR MECHANICS ADVERTISING SECTION Position with Unlimited Opportunities” 0. Trego, Waterloo, BF A RAI WW TRAFFIC INSPECTOR Earn Up to $250 Per Mo. Position GUARANTEED Hundreds of openings for trained Traffic Inspectors Any average man can qualify Steady, pleasant, outdoor work; travel or remain near home. Something new every day. Splendid Opportunities Start at $110 per month, expenses paid, after 3 mos. spare-time study at home. Advancement rapid with experience. Earn up to $250.00 and $300.00 per month. Many splendid opportunities thru contact with big railway officials. Read What G. O. Trego Says: “‘Having completed your course in traffic inspection about nine months ago and received a position within a few days thereafter, I now feel it my duty to ex- press my gratitude to you for the help which was extended me after I began work. And that was far more than I expected. “T find railway traffic inspection to be the most in- teresting position with unlimited opportunities that any man could look for. I find that being a railway traffic inspector does not only enable a man to receive higher positions in railways, but it also verses one so he is more capable of conducting any kind of busi- ness which may be chosen for the future. *‘T must admit that the price paid for the course of traffic inspection is the best investment I made.’ YOU TAKE NO RISK If position is not obtained for you, enrollment fee is refunded without question. You have nothing to lose! Send coupon for full details and booklet No. D-585. STANDARD BUSINESS TRAINING INST. BUFFALO, N. Y. 2 eB eS SS SES 8 ee ee eee eee eee ee ee ee ee ee ee Standard Business Training Inst., Buffalo, N. Y. Send me, entirely free, Booklet No. D-585, giving full particylars about course in Railway Traffic Inspection. tailway Name Street City... You can produce most wonderful, soft, sw: music from any common carpenter's saw wit violin bow orsoft hammer. If you know how No musical ability required—you need not know one note from another Easy to Learn in 3 Weeks I ABSOLUTELY GUARANTE! teach you to play popular music within t! weeks. I will give you all the secrets tricks I have learned in my ten y: success a8 & BAW Musician —secrets never before revealed and unknown to other m)s- ical entertainers. Very little practice required—it’s all in knowing how. I furn ‘ specially tempered Musical Saw and com, course of instructions. Send today for complete pres information ** How to Play a Saw. C. J. MUSSEHL - = = 312 MACK BLDG. FT. ATKINSON, wis. ‘Learn to Draw in One Evening “—just as I did. I made actual pictures in an hour after course arrived. Charles Lederer’s wonderful method of dr ing, as he calls it, makes drawing almost aseasy as writing. Be long, I was holding down a well-paid position as a newspaper art Complete Course Sent FREE Just mail le tter or post card to Lederer’s publishers. Address them as “Independent Corporation, Dept. D-456, 319 Sixt! Ave., New York.” Say “Without obligation on my part send me Lederer Complete Art Course for five days’ free examinatio: Examine this course. See how easily you can become an ar almost “while you wait." Then, if you decide to keep this wonder- ful short-cut to a new, dignified, well-paid profeasion, all you to dois to mail = © only $3.00 in full payment. There wil! | further charges. ou do not wish to keep this course just r it to them oehin ry days. You do notrisk a penny. But quickly. Better — letter today. NAVIGA TION TAUGHT BY MAIL Hundreds of Ship Officers need: Merchant Marine and Navy. 8a “4 up to $412 monthly and living ex- venses. You can qualily through ( tain Warren Sheppard’s Home 8: Course on Navigation. Chance ofa aE / lifetime to_see the world as a ship's officer ata big salary. Write for free Book, “Your Futere is on the Seven Seas.” World Technical Technica] Institute, Dept. 100A, Fuller Building, Jersey City, NJ. 'HicHerR Epucation| Courses in English, Spanish, Mathe- matics, Chemistry, Drawing, Educa- tion, Business and in 35 other subjects are givenbycorrespondence. Beginany time : Ghe University of Chiraga b.. ae 30th Year t Divisten 4. Chicago, II! _ LEARN MOTOR MECHANICS Our Big Shop Standard methods prepare you for the paying jobs—make you a real mechanic. Test and Tro work alone is worth tuition. Completely equipped s! Get full information. Write for Big Free Book 1OWA STATE AUTO & TRACTOR SCHOOL “The Quality School” 739 Nebraska St., Sioux City, tow — — RADIO FOR THE BEGINNER An up-to-the-minute book in plain language preset ing the principles of radio, the vacuum tube, radio tu and helpful suggestions for the Beginner. Handy po size, substantially bound. Price $1.00. Address: ALFRED FOWLER 18 Board of Trade Kansas City, Missour

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how , wis, dr sour POPULAR MECHANICS ADVERTISING SECTION 25 How Do You Look in a Bathing Suit? Are you proud or ashamed of your appear- ance? Do you often long to hide your skinny arms or legs, your flat chest or your narrow shoulders? Perhaps you are one of those with a stout abdomen, which not only hinders you in your every effort, but is most un- pleasing in the eyes of others. Are you Satine’ to go through another summer just as you are today? Or do you have that longing for big, broad shoulders, massive, muscular arms, well shaped legs and a deep powerful chest? These are the possessions we long for as we step out on the beach. For at this time we are judged by our physical appearance. It is now up to you as to whether others will admire you or scorn you. Why All This Muscle? With massive muscles come mighty strength, powerful personality, tireless energy. You will also possess internal organs which function properly thus causing your entire being to fairly thrill with life and vitality at all time. A Real Strong Man You can be one. Now is the time to start You ean completely change your physical appearance before the summer is over. You can fill out your chest, broaden your shoulders and develop arms to be justly proud of. And with it you will attain the vim and pep that EARLE E. LIEDERMAN Dept. 2006, 305 Broadway, New York only a real live blooded athlete knows. Those who now look at you and smile will envy you for your physical charms. They will look up to you and respect you. Get busy then, for time flies. Summer will soon be here. What impression are you going to make? Decide right now that this dominant physique will be vours Send for My New Book “Muscular Development” It contains 26 full page photographs of myself and some of the athletes I have trained. This book is bound to interest you and thrill you. It will be an inspiration to you. There is not an- other book like it on the market. I want every man and boy who reads this page to send for a copy. Jt is absolutely free. Remember, this does not obligate you in any way. L want you to have it, so it’s yours to keep. All 1 ask you to cover is the cost of wrapping and postage—10 cents. Now, do not delay one minute. This may be the turning point of your entire life. Tear off the coupon and mail at once while it is on your mind. EARLE E. LIEDERMAN Dept. 2006, 305 Broadway, New York City Dear Sir:—I enclose herewith 10 cents, for which you ire to send me, without any obligation on my part whatever, a copy of your latest book, “Muscular Develop- ment.” Please write or print plaints City Stat SSeeeaea ieee -SSeeaeeaeue Se

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26 Make Your ENGLISH Win for You! You are sized up every day by the way you speak and write. The words you use, the way you use them, how you spell them, your punctuation, your grammar —all of these tell your story more plainly than anything else youdo. And it is astory open toall. An unusual command of language enables you to present your ideas, in speech or on paper, clearly, forcefully. convincingly. Sherwin Cody’s Wonderful New 100% Method Self-Correcting! A simple method has been invented by which you can acquire a command of the English language from the ground up. Sherwin Cody, perhaps the best known teacher of practical English, after twenty years of research and study, has perfected an invention which places the ability to talk and write with correctness and force within reach of every one with ordinary intelligence. Sherwin Cody was amazed to discover that the average person in school or in business is only 61% efficient in the vital points of English grammar. That is because the methods of teaching English in school left you only a hazy idea of the subject—they did not stick in your mind. But Sherwin Cody’s new invention upsets all old standards of teaching Eng- lish. His students secured more improvement in five weeks than had powtousty been obtained by other pupils in two years. Only 15 minutes a day of spare time with ‘100% Self- Correcting Method” will, within a very short time, give you an easy command of language. 15 MINUTES A DAY PERFECTS YOUR ENGLISH Mr. Cody was granted a patent on his unique device, and now places it at your disposal. It overcomes the only weak point in instruction by mail. It actually takes the place of an instructor at your elbow. It assigns you lessons in Expression, Spelling, Punctuation, Grammar, Reading and Conversation, corrects them for you, and anticipates your questions. It even grades your papers and assigns you your class percentage till you reach the 100% mark. Yet so simple are the lessons that only 15 minutes a day are required, and each minute is fasci- natingly interesting. If you feel your lack of New Book Free language power, if you are ever embarrassed by mistakesin grammar, spelling, or punctuation, if you cannot command the exact words to express your ideas, this booklet will be a revelation to you. Merely mail the coupon and it will be sent by return mail. Learn how Sher- win Cody’s new invention makes command of language easy to gain in 15 minutes of your daily spare time Mail this coupon or a postal AT ONCE. Sherwin Cody School of English 56 Searle Building ROCHESTER, NEW YORK SHERWIN CODY SHERWIN CODY SCHOOL OF ENGLISH 56 Searle Building, Rochester, New York Please send me at once your Free Book “How to Speak and Write Masterly English.” Name.. A ddre SS City State | | | | POPULAR MECHANICS ADVERTISING SECTION Good-paying positions in the best studios of the country, await men and women who prepare themselves now. For 28 years we have successfully taught Photography, Photo-Engraving and Three-Color Work Our graduates earn $35 to $100 aweek. We assist them to secure these positions. Now is the time to fit yourself for an advanced position at better pay. Terms easy; livinginexpensive, Largest and best school of its kind. Write for catalog soday. ILLINOIS COLLEGE OF PHOTOGRAPHY Box P, 999 Wabash Ave. Effingham, Illinois Your Opportunity in MECHANICAL DENTISTRY Ambitious men of all ages can rise above small salaried positions into this pro fession of unlimited possibilities. Taught by actual practice—day or evening. Three months’ course. Moderr laboratories. No previous knowledge o1 experience required. No charge for tools or equipment. The men we train are in demand. Established 30 years. Catalog fre« Address your inquiry to Dept. 2 cr OoOLS ° BODEE “*ecnanical DENTISTRY PHILADELPHIA BROOKLY 15 Wano Walnut Sts. 15 Flatbush Ave NEW YORK N 436 W.52 St. EARN MONEY EARN Show Card Writing by our new, simple Directograph system and earn money in your spare time at home. No canvassing or soliciting. We guarantee to supply work and pay you cash for the — yeu do. Write for full particulars and free let. WEST-ANGUS SHOW CARD SERVICE 76 Colborne Building Toronto, In Your Spare Time at Home for BUSINESS or PROFESSION Course by Correspondence through Lecture System es was give for years at resident classes of this college. We coach you free t pass the Bar Examination. Complete 1921, 13-volume librar I terms. Organized1910. Low enrollment fee. Write for free book Hamilton College of Law, 431 S. Dearborn St., Dept. 66, Chicage SHORTHAND IN ONE MONTH Boyd—the Wonderful, New, Easy System. Writ hold World’srecord. 100 to 150 words a minutein 30 days guara! teed. New Principles—dictation first week. Best for Court Reportin: and Secretaries. Also Typewriting, Bookkeeping and Commer: Law. Send today for Catalog and Money-Back Guarantee CHICAGO HOME STUDY SCHOOLS, 802 Reaper Block, Chicago, I! St AW i XPER “HOW TO BECOME AN EXP! F It contains specimens and tells how others bec Your name written on a card if you enclose stamp. T. M. TEVIS, Box 25K, CHILLICOTHE, MO. Write for my FREE BOOK; PENMAN.’ expert writers

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or TD or "he ame ve yO» ago er at Ih | POPULAR MECHANICS ADVERTISING SECTION 27 Because Our __OUR STUDENTS SAY __ Blaine, Wash.. March 8-22 |F iret Hawaiian Conservatory of Music, as. P. Holland, Bes Sir I received my Guitar in good con- dition and am now on my ninth lesson I am having no trouble at all, and ust say that I am more than with the course and the simplicity of it Any person who will just half try will sure succ have never studied music of any kind. Conse- vently did not know one note from snother and thus far I have committed ali my lessons t« memesy am ina way h endlennped by the lose of the index finger of the right hand but by little practice I find no great difficulty n playing or picking the different anges #0 say any person who has lof their fingere with a little practice ild experience little or no diffeulty by your wonderful method. I will be pleased to recommend your course my friends. Very ag | TY! B.R. SOUTH. Class No. K1-12,053. San Quentin, Galil. Jan. 15-22 First Hawaiian Conservatory of Music. 5 Wor worth Building, City. ear Sir Lessons 18 and 19 came last evening You Can Play the Hawaiian Guitar Just Like the Hawaiians! Native Hawaiian (Instructors Will Help You Our improved method of teaching is so simple, plain and easy that you begin on a piece with your first lesson. tn half an hour you can play it. Thousands of successful students prove this to be true. ONLY 4 MOTIONS We bere reduced the necessary motions you | learn to only four, and you acquire these in a very few mm Then it is only a matter of a little practice to acquire the weird, fascinating, tremolos, staccatos, slurs and other effects that make this instrument so delightful. The Hawaiian Guitar plays any kind of music, both the melody and the ac- com paniment. FREE Just think of it. 52 lessons on this won- derful guitar. You get a beautiful large sized Genuine Hawaiian Guitar absolutely free as soon as you enroll for the lessons. All the necessary picks, the steel play- ing bar and §2 pieces of music are included without cost to Special Arrangements for Lessons if You Have Your Own Guitar Wes snd I was pleased to see that they are beginning to get hard, or at least a } 4 ttle bit more to learn in them. I ay ny USIC ave a great deal of spare time to put 2 on the Guitar and I enjoy it. Your A A NAME ATO urse is the simplest and most inter- sting I have ever tried to learn. 1} In half an hour after you get the free ; ry lenogn up te fine and can pisy! Hawaiian Guitar and the first lesson, sy readily mee that when I have| You can play Hawalian Melodies. 8 od with ail. of the lessons I will Tear Off and Mail Today First Hawaiian Conservatory of Music, Inc. 233 Broadway (Woolworth Bidg.), New York City Please send me full information about your 52 easy lessons and FREE GUITAR OFFER. to play most anything and In a very short time after a little prac- ping it good. I am, in . iation, tice you can play any kind eof music NAME Yours truly, J. B. FERGUSON. as well as Hawaiian, both the melody NAME. wc cece ee eeenneee eeeee eeeee eeeeeeese P.S. If at any B ath you wish to se my name as a reference for your and accompaniment. | course you may do so, aa I think that (RPE c 0 60006000 005060600088008 eocccsccces oe soy one who takes it up will derive a [ TEAR OUT COUPON ] nee creat benefit from it and never regret itt aneneeeesneshananers —. 0 er Print name and address clearly. P.M.6 Wonderful opportunities con- MONEY you thoroughly to start your own business or make good money as mo- ahs and Tractors | [Time ts" ROPP’S CALCULATOR . | Desk Size, - - $1.50 py Saves Both a ows pri cea, | Posmet Quantities: Pocket size, cloth, bas ~ 4 weights, ete ; sar com mo paper, -35 tor expert, driver, shop foreman, etc. — = — Summtue 7,000 Graduates making ness. WELLS & EDWARDS 852 George St. Chicago, 1H. Send for free book catalog good. Catalog Free Cleveland Automobile School, 1814€. 24th St., Cleveland, 0, shana * THERE'S MONEY INIT” - _=_—_— ===, 4),-L EARN TELEGRAPH Y=: E- —_—— — ee — HOME —E-— cee ~,.-—--——_ -MORSE AND WIR ELES —— St: a we ee ow 2 meat © we wee mmm mee ew TEACH YOURSELF ne tet twa Delemane tien ie tte Mee teat nental Messages, | at any speed, just as an expert operator would. Adopted by U.S. Government, and and Telegraph Schools. 3 styles. Catalog free. OMNIGRAPH MFG. co. 16-22 Hudson St., NEW YORK not spe nd & Spring, Summer and Learn Watchwork, Jeweirywork | WHY fins ee? Ba and Engraving. A ifine trade commanding a good ape bundre ds of kinds for collections Some ‘worth eac 8s p witt y in- lary, and your services are alwa\s 7 each imple outdoor work 1m indemand. Address ) structions, pictures, pricelist. Get posted now. Send Peoria, Ill., for our bon pee mg AL, Dept. P, Bradley Institute, 25¢ (NOT STAMPS) for my Mlustrated Prospeetus. ry Mr Sinclair, Dealer in Insects, Dept. 6, Ocean Pa Railway Mail Clerks AIL CLERKS $ 1 600 to $2 300 Year Ea FRANKLIN INSTITUTE, Dept. D177, Rochester, N. Y. Sirs: Send me without charge, (1) sample Railway Mail MEN—BOYS OVER 16 rs Clerk Examination questions; (2) Schedule showing places SHOULD WRITE IMMEDIATELY S$ in all coming U.S. Government examinations; (3) list of many government jobs now obtainable. Steady work. No layoffs. Paid Vacations & —— Common education sufficient. Send coupon today—SURE y Address...

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28 $15 to $25 a Week at Home in my Spare Time ByWm.S.Coulthard I needed money. I had a lot of time on my hands in the evenings, Saturday afternoons, ete.—for I had no hobby—and besides my expenses had been mounting fast—so you will see the receptive mood I was in when I saw your little ad, “MAKE MONEY AT HOME.” I sent for your free booklet I read it. Your plan looked good to me—your guarantee so liberal —and on investigation I found you were reliable, so I accepted your offer. If others could make money by your plan, I could That was less than a year ago. Now I am earning $15.00 to $25.00 a week, each week, writing show cards in my spare time. In addition to this, I still hold my regular job, and my salary has been increased there, too. I believe my spare time work has made me better satisfied with life, and so I'm doing my regular work better. I have been offered positions writing show cards, interested, as my — aa is perfectly 1 certainly am glad I enrolled in your school—my spare time money is exceedingly attractive. Besides, 1 find show card writing an interesting occupation that fills in those evening hours that used to drag so. In fact, it is really a hobby now with me—and a profitable one, as you can well imagine. Only last week I received a check from your school for $70.00 for work done over the last three weeks. Of course, you'd have paid me regularly each week if I'd bothered about it, but I was too busy to tell you the amount of work I'd finished. There are times, however, that I feel show card writing by your simple method is almost too good a thing—that’s when I have so many orders ahead that I cannot see my way clear to finish them— and have to turn down work. Your system of supplying work to your students has certainly helped me, but sometimes you send too much—I'm only working at it in my spare time, you know. Please note this, and don't try to overload me too much. By the way, I think you'll be interested to know that previous to enrolling in your school I had never tried my hand at any work of this nature I’m glad to thank you for what you've done for me—and you can certainly use my name and tell prospective students, for I feel I'll be doing any one a real good turn if I can help them get started in this profitable work.

but I am not satisfactory, but Yours sincerely, WM. 8S. COULTHARD. NOTE:—The above is the story of Mr. Coulthard. It tellsTof facts, for Show Card Writing offers a marvelous opportunity to both men and women, either for spare time or full time work hat Mr. Coulthard has done and is doing, you can do. Colbran, Dusen- berry, Wendt, Blade, Poulson, Charles, Wright, Babineau and many other men have proved it. Mrs. Litherdale, Mrs. Lush, Mrs. Le Moine and dozens of housewives have Ps udded to the family income in this way Girls like Pa Misses MacDonald, ee oe — — 4 Yd are but a few of those who have bettered their P positions in this pleasant way. Al! these 02” ~ American owe their success to the American Show « i _ -_ make money at home—without canvass- tic ulars if you -y send ge? ing or soliciting. It is understood that this your name anc ad- 4 places me under no obligation of any kind. dress to them. <¥ «ae 7 Name.. , pregndyeeaes Use this pee (Print your name plainly) Soupon “ Coury a + Address TrPTTT TTT Tr te 7 In full) a — GO EEE teat eee e tener ees eeaneeeeeeeeeeeneeeeeens /7 State...

POPULAR MECHANICS ADVERTISING SECTION

"7 $2 (os é We can teach you DRAWING in ‘e AON. your own home { / during your - Our 18 spare time. years of success ful teaching prove our ability. 10 Courses in Commercial and lilus- trative Drawing, Teachers Normal and _—- Art: Endorsed b h art authorities. Students Pireaneal by inembers of our -Faculty ‘are ‘filling ‘high-sala-

ried positions. Artist’s Outfit FREE to Eavetied tudents. Write today for Art Year sFREE VS | ook.

SCH@DL“APPLED ART AppuepAnrBipe.No. 2 BATTLECREEK MICA.

Keystone Institute Automotive Course A splendid opportunity to learn the automobile busi ness by comprehensive instruction and actual practice Your success assured after finishing our course, whether | as mechanic, salesman, or garage owner. Complete equipment, expert instructors, every modern facility for a thorough knowledge in this ever-growing field. Day and night courses. Write for full information tc The Vice-President, | 133 N. Fourth Street, Reading, Pa. ane For more than s ELECTRICAL iisions scrinor in" school has been training men of ambition ead imited time, for the electrical industries. Condensed course in Electrica! ENGINEERING °3)'3 == ates to secure good positions and promotions. Theoretical and practical Electricity, SToctometic s, Steam and Gas Engines, Mechanical Drawing. Students construct dynamos, install wiring and IN ONE YEAR test electrical machinery. Course with diploma,com plete Thoroughly equipped fireproof dormitories, din- ing hall, laboratories, shops. Over 3000 men trained Write for catalog. 30th year begins Sept. 27, 1922. BLISS ELECTRICAL SCHOOL 404 TAKOMA AVENUE, WASHINGTON, D.C LEARN WATCH REPAIRING Bea watchmaker—you can learn this profitable trade by corresponcence in a few weeks in your own home by the DeSelms Chart System. After you complete the course you will know a watch from A toZ. You will know just what the matter is and how to repair one. When you Graduate you will be & practical watchmaker audi ception rand competent to fill any position. Positionsfor our graduates. Ask for our Free Book. I texplains our system and terms THE DeSELMS WATCH SCHOOL 23 Perry Street ATTICA, INDIANA

men with training are ip

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oo Ya 2 ts. POPULAR MECHANICS ADVERTISING SECTION 29 If He Had Passed It Up He Would Still be a Laborer at $2a Day. No Money, Nothing Ahead but Hard Work, Longer Hours—and Regrets. But He Didn’t Pass It Up He decided to learn Mechanical Drawing. He buckled down to Draftemen are often advanced to Chief Draftsmen, Chief Engineers, work with the Columbia School of Drafting. When he had a Production Managers and so on. julet half hour to spend he spent it—as a wise man spends money to get full returns. GET THE RIGHT TRAINING. Mr. Claflin. the founder and * ; Cc a Se f MADE $275 EXTRA IN 3 DAYS. He ntl ved $275 director, stands personally in back of the Columbia School o Ww. for one drawing that only took him three days to Drafting You spend no time in long-winded theories—useless and expensive to you. You start on actual drawing work the day OW HOW ABOUT YOU? Are you working up hill or down? you receive your first lesson. ‘ount the money in your pay envelope next pay day. You'll find the answer there. YOU NEED NO PREVIOUS TRAINING. The course is easy to understand and easy to follow. Many students are qualified MAKE $35 TO $100.00 A WEEK. We will train you to be an even before they complete the course expert Draftsman in your spare time at home by mail. lots of room for you if you act now. There's SUCCESS CALLS MEN OF ACTION ONLY. If you are a man of action clip the coupon now and show that you are a man of action PROMOTION IS QUICK. WE'LL QUALIFY YOU for a high- c Keep right on top of -* opportunity to make real money. Don't alaried position in the drafting field and keep you in touch with © looking for a pair of scissors. Tear the coupon off and mai! penings for Draftsmen in the big machine shops, industrial plants tright now. We Rave a special offer for those who reply prompt! ind United States Government departments. Men who start as Get started now. What We Give You PRACTICAL PROBLEMS. ou are carefully coached in practical Drafting wor WE HELP YOU GET A JOB. We help you get « position as a prac- | Draftsman a6 soon as you are qualified. PER vite AL INSTRU CTION AND 8UP ERV ISION THROUGHOUT ik oe RS ou receive the personal! instruction and help of Roy = pr aoe 5 of the Columbia School of Drafting and a ‘peastion! teman of many years’ experience. DR AF TSM LN'S EQUIPMENT. We furnish you with « full set of pment and Drafting Instruments as shown in the picture melow ‘when you enroll. You keep both sete on completing the course INSULTATION PRIVILEGES. You are free to write us at any r advice and suggestions regarding your success. b t IPLOMA. The diploma we give you on completing the course atteste it proficiency asa Drafteman. It is an “entering wedge” to success EE sv PSC RiP TION TO DRAPTSMAW' s Pr Bt ICATION , “THE A ure ¢ subscription t ur helpful. inspiring ‘ ° ‘The Compens” co > Drafting ; Outfit FREE We give you free with our course this professional Draft- ing outfit. It is yours to keep when you complete the course. U. S. Civil Service Commission Needs DRAFTSME The following are a few of the many pes tions open in Government Departments fron time totime. The salaries are starting salaries, subject to increase. Practically all of them carry a bonus of $240 a year additional Architectural Designer . $4,000 Chief Draftsman (Aeronautical) Naval Aircraft Factory, per day 15.04 Aeronautical Draftsman—Field Service of Navy Department, $5.20 per day to $12 per day. . nd in this coupon today FREE BOOK ®.3.:):228-8%: will se sad you our book, “Your Future in Drafting,” which tells you all about our new method of teaching Mechanical Drawing and gives full details of our special offer to those who reply promptly. THE COLUMBIA SCHOOL OF DRAFTING Roy C. Claflin, President Dept. 1755, 14th and T Sts., N. W., Washington, D. C. — ———-Free Book Coupon-——--—- 7 F OLUMBIA SCHOOL OF DRAFTING, | Dept. 1755, 14th and T Sts., N. W., Washington, D. C. | Enter my name for a free subscription to “‘The Compass” and also send 1 me without charge your illustrated book on Drafting, telling me how 1 I can secure your complete Home Study Course and your help in secur- 1 ing a position as Draftsman | { Name ] Addres , City State |

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30 POPULAR MECHANICS “ Look At Him Today!” “Six years ago he started in here just as you are doing. Now he’s General Manager and makes more in a day than he used to make in a week. The first week he was here he began to train for the job ahead by studying in spare time with the International Correspondence Schools. Inside of six months he got his first promotion. You’ve got the same chance he had, young man. Follow his example. ‘Take up some I. C. S. course right away. What you are six years from now is entirely up to you.” This is the story of thousands of successful men. ‘They did their work well, and in sparetime, with I. C.S. help, trained themselves for advancement. ‘That’s the thing for you todo. Whatever your chosen work may be, there is an I. C. S. Course that will prepare you rightat home fora better position with bigger pay. More than 130,000 men are getting ready for pro- motion right now in the I. C. S. way. Let us tell you what we are doing for them and what we can do for you. The way to find out is easy. Just mark and mail this coupon. _—— a TEAR OUT HERE wm we we ee ee INTERNATIONAL CORRESPONDENCE SCHOOLS BOX 5641-C SCRANTON, PA. Without cost or obligation, please explain how I can qualify for he position, or in the subject before which I have marked an X ELEC. ENGINEER s BUSINESS MANAGEM’? Electric Lighting & Railways -}) SALESMANSHIP Electric Wiring |) ADVERTISING Telegraph Engineer ]} Show Card & Sign Ptg. Telephone Work C) Railroad Positions MECHANICAL ENGINEER |) ILLUSTRATING Mechanical Draftsman _} Cartooning Machine Shop Practice _) Private Secretary Toolmaker |} Business Correspondents Gas Engine Operating [}] BOOKKEEPER cIV IL ENGINE ER |) Stenographer & Typist Surveying and Mapping ar ertified Public Accountant -}] MINE FORE MAN or ENG’R JTRAFFIC MANAGEB STATIONARY ENGINEEB [J Cost Accountant } Marine Engineer [}GOOD ENGLISH ARCHITECT }¢ a ae sot Subjects Contractor and Builder a row 8 VIC Ss Architectural Draftsman _} Railway Mail « erk _} Concrete Builder [JA AU TOMOBL LES. Structural Engineer =P agg i+ uF J ‘} seseeeal- rt n oo000o0 COC PLUMBING & HEATING Sheet Metal Worker Textile Overseer or Supt. |] CHEMIST LJ Pharmacy P _ > Raising D French Airplane Engines (J Spanish [J WIRELESS LJ Banking Be cncsvicsvescenisntcemabinben aeavndinttintiinianestntenaaiitessnuntintinenecngetpeinssedinntnibamile ee Street 2-!'-22 SE TITITEN scthsesiiiccnpighibadionnetieioensdeadahtdiagluioitiinierelesosncendpmasasuienanmapie debaaletatttinadeanadiinial a ~ wie ainesauneneneee State Occupation... Persons residing in Canada should send this coupon ti tional Cor the Interna- reaspondence Schoola Canadian, Limited Montreal, Caneda. Please Mention Popular Mechanica ADVERTISING SECTION THE PRACTICAL Automobile, Wagon, House and Sign Painter By W. F. White Postpaid, $1.00 This book is written for the man who wishes to paint his automobile, or his home, or wagon. It will tell the in- experienced just how to do it, and it will tell “him” how to mix paints. It also painters’ recipes wand trade secrets of Bound in Cloth—157 pages—Size 5x7% Postpaid $1.00 SHREWESBURY PUBLISHING CO. 5525 West Lake Street Chicago, Mlinois LEARN PIANO ) TUNING MAKING TRIALS contains many great value. OF TRUE TONE By TUNE-A.- PHONE Wefurnish our accurate teaching device with tools, Action Moéel, lessons, and analysis of business advertising which makes you a master of the tuner's art. Diploma given graduates. 18 years’ experience in teaching the By ipgeprntent nt nad lucrative profes- sion by correspondence than oral instruction. Write today ys ys REE booklet wd | guarantee plan. NILES BRYANT SCHOOL OF PIANO TUNING 22 Bryant Bidg. Augusta, Mich. IN YOUR a “own Yor cam mad Thun Likethuqudly HOME Piano, Organ, Violin, Mandolin, Guitar, Banjo, etc. Coginnars or advanced a pevers. By weekly. be gay make everything riain niy ex cover cost © music Write for FREE book klet which “Sxplaine everything in fu &MERICAN SCHOOL OF MUSIC. 51 Lakeside Bullding, CHICAGO RING You can learn by our modern and original system of instruction every part of the Watch Repairing Trade at home as good or better than at a shop. You can earn money while learning and secure a well paying position or start in business after com- pleting our course of instruction. Good watch repairers are always in demand and earn from $30 to $70 per week. For particulars apply to the wesconee SCHOOL OF WATCH REPAIRING Mason St.. MILWAUKEE. wis. LEARN AUTOMOTIVE ENGINEERING A business for “live wires."" There is a constant demand for trained Repairmen, Chauffeurs, Truck Drivers, Demonstrators, Automobile Salesmen, Garage Managers, etc. COURSES $25 AND UP Positions secured for all competent graduates without charge Diplomas granted. Write for free booklet, SReee COLLEGE OF AUTOMOTIVE ENGINEERING 24 Wabash Ave., Dept. 16 Chicago, tif nois Learn Chemistry at HOME Chemistry offers the greatest opportunities to-day of any profession If you want to know how you can learn chemistry at home, in yo ur spare time, write to one of the foremost authorities on Chemists Dr. T. O’'Conor Sloane, care Chemical Institute of New York, Home Extension Division 6, 140-P Liberty St., New York City Dr. Sloane will send you full information FREE, by return mail.

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POPULAR MECHANICS raftsman’s Complete Ortiagt Everything Used by Expert Draftsmen Given You Absolutely FREE Outfit Includes “professional” complete set of fine drawing instruments with double set of compasses and dividers all in velvet lined case. Drawing board. T square, two triangles, protractor, universal curve, triangular, standard scale, water-proof ink, pens, pencils and all accessories—furnished you free in this expert's complete outfit. Draftsmen Make $225.00 to $500.00 a Month There is a tremendous demand for trained draftsmen. Now is the time to start. Draftsmen get good pay from e start and can work up to $500 a month end more. Draftsmen are needed everywhere. Once you are ned you can choose your own business and work inany rt of the country 1 please. Coyne 1ining makes 3M hs’ C erything easy for ont Ss se at o4, Govne student, | © p 1 Youcan quality as.an ediately cates Cc expert draftsman ae der a " | by 3 months’ intensive training bow ~ at the y arse | went to work 1" he schoo! in ¢ hicago age for Armour & Co cheap. Possibilities of “ - and earning way while study- Vork was easy for me lf. ng. Ifyoupre fer to Five months later come to ec hoolinstead of | accepted a position tae “Home Study in New Yorkat a large course, cheek coupor rease in salary.” and send it for com- plete information B.W. HOME STUDY “DEPT. TRADE & ENGINEERING SCHOOLS Recognized Producer of Successful Men 39-51 E. Illinois St., Dept. Al77, Chicago, Ill. ADVERTISING SECTION Easy to Learn at Home from Great School Known all over the World The Coyne Home Study course guarantees to train you. Remember, the Coyne Trade and Engineering Schools are recognized by educators all over the world. Students come from all over the world toget Coyne train- ing. Why? Because of the Coyne school’s long established, tremendous reputation for successful teaching by its great staff of experts. Coyne is not a ‘‘one man” school, but a t educational institution, 22 years old, an acknowledged adder and originator. Coyne originated the ‘Learn by Doing” method now endorsed by educators everywhere. Coyne has graduated thousands of successful, prosperous men all over the world. You can't makea mistake if you write for the Coyne free book. Coyne students say every minute of the course was enjoyable. Some students took good positions three months before their course was finished. Send for FREE Book Mail this coupon for our interesting book, ‘‘Drafting, the Foundation of Industry,” sent you free It explains all about the Coyne home study method and shows you how to become a draftaman in the quickest and easiest way. You want to know all about this great institution Don't pat it off Send for this book now It’s absolutely free, no obligation It contains the most valuable information you will ever get in your life Send the coupon now Check Coupon Below and Mail Now! Coyne Trade and Engineering Schools, aiso full information about the Course in Drafting. (Check course you prefer.) Home Study Course School Course Name Address A RERE ERE EES SES SEER ESSEEE, Ciuy.. ee ccccccccccoccesesosess State . Department A177 39-51 E. Illinois St., Chicago, Ill. Dear Sirs:—Please send me, absolutely free, without obli- gation, your book, “‘Drafting, the Foundation of Industry,” phtch

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POPULAR MECHANICS ADVERTISING SECTION Weg ‘OH oo ve — —— “Electrical Experts” Earn $12 to $30 a Day Today even the ordinary electrician—the “‘screw-driver”’ kind—is making money —big money. But it’s the trained man—the man who knows the whys and wherefores of Electricity—the “Electrical Expert’? who is picked out to “boss” ordinary electricians—to boss the big jobs—the jobs that pay $3,500 to $10,000 a Year. Get in line for one of these “Big Jobs’ 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. My Course > in Electricity is the most simple, thorough and successful in existence, and offers every man, regardless of age, education or previous experience, the chance to become, in a aged short time, an “Electrical Expert,”’ able to make from $70 to $200 a week. ‘ I Give You a Real Training As Chief Engineer of the Chicago Engineering Works, I know exactly the kind of Xx training a man needs to enable him to get and hold good positions, and to earn pd big pay. I not only know, but I give you that training—I will train you as I Chief have trained thousands of other men who, today, are holding splendid elec- Engineer X\ trical positions, or are in business for themselves as Electrical Contractors. Chicago X\ FREE ELECTRICAL With me you dofPRACTICAL work A 2 at HOME. You start right in after the Engineering X\ Working Outfit 6.4: few iessons to WORK AT YOUR Works PROFESSION in a practical way For this you need apparatus, and I give it to you ABSOLUTELY FREE. For alimited period, besides mak- . Sei 50 Law- ing a slashing cut in the cost of my tuition, Iwill GIVE each new stu- ee x A, ~ o. Ill X dent ABSOLUTELY FREE OF COstT, a complete Electrical Working ence Ave., Chicago, . Outfit, consisting of Voltmeter, Ammeter, Electric Motor, Bells, Wire Dear Sir:—Send at once Sam- X Gauge, Wire for Wiring, Tools, etc., for home and construction work. ple Lessons, your Big Book, and X But You Must Act Today full particulars of your Free Outfit and the two Home Study Courses This offer is positively limited, and may shortly be withdrawn all fully prepaid, without obliga- Fill in and send me the coupon, or drop me a post-card, giv- tion on my part ing me your full name and address, and receive full particu- lars of this great offer. But do it NOW—TODAY— X before it is too late. Name ; . L. L. COOKE, Chief Engineer N CHICAGO ENGINEERING WORKS Address Dept. 1-A, 2150 Lawrence Avenue, Chicago, Ill. The Cooke Trained Man is the “Big Pay Man | 6 Too, Can Learn Oe Ue Se EXTRA SPECIAL! Radio Course FREE An up-to-the-minute Home Study Course— the latest wireless de- velopments—given free to all who enroll for my great Electrical Course NOW:., Two courses for the price of one. Mail coupon for full particulars. What's YOUR Future? Today you are earning $20 to $30 a week. In the same six days as an Electrical Expert, you can make from $70 to $200, and make it easier —not work half sohard. Then why remain in the ‘small pay’’game- in a line of work that offers—No Big Promo- tion—No Big Income— No Big Future? ; Fit yourself for a Big Job. Your Success Is Guar- anteed So sure am I that you can learn electricity— so sure am I[after study- ing with me, you too get in the “big money ciass in electrical work, that I will guarantee under Bond to return every single penny paid me in tuition if, when you have finished my Course you are not sat- isfied it was the best investment you eve! made.

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POPULAR MECHANICS ADVERTISING SECTION 33

CLASSIFIED ADVERTISEMENTS] WORLD'S BEST WANT AD MEDIUM

Advertisements in this section, 25 cents per word, each insertion, minimum 10 words, payable in advance. To be inserted under proper classification in July issue, copy should be in our office May 25th.

AUTOMOBILE SUPPLIES AUTOMOBILE Parts, guaranteed new, yr all cars. Save money; get parts direct st wholesale. We ship immediately from tock, transmission and differential gears, bearings, Shafts, gaskets, flywheel gear rings, pistons, rings and other parts for any car When necessary we make gears special from old samples Get our whole- le prices today. Wire or write us when you need parts in a hurry. State make of car, model and parts wanted. We refund your money, including transportation charges, if parts are unsatisfactory Me- chanics Gear Works, 3708 North Halsted Street, Chicago, Ill. AMERICAN Garage & Auto Dealer pub- lishes each month interesting and helpful suggestions and information on _ sales, merchandising, advertising, business man- agement, accounting, welding, cutting, braz- ing, practical and progressive hints for vffice and shop for ‘‘small-town’’ auto-

motive dealers, garagemen, repairmen, mechanics. Subscription price $1.00 per year Sample copy on request American Garage & Auto Dealer, 1004 Lake View Bidg., Chicago.

AUTOLOG! Only accessory on the mar- k for keeping monthly record of gas, oil and mileage per gallon, Clamps on steer- ing wheel. No larger than a watch. Price, 00 Satisfaction guaranteed or money back. Autolog Company, Dept. P, 1032 So. Grand Ave., Los Angeles, Calif. AUTO Parts—Save 25-90

New gears

© bearings, springs, radiators, magnetos 1000 models. Bankrupt supplies, retopping fit Brightman Auto Exchange, 321 Windsor Ave., Hartford, Cann. Largest in the East. AUTO Parts; Case, Overland, Paige, Studebaker, Ford, Maxwell; also starters and generators, Motor Service Co., 715 \ Spring, St. Louis, Mo. ALTO Top Roof Covers easy to put on,

\ drive 100 tacks and save $15 to $49. Ford Roadster $5.20, Touring $6.95 and $9.9 Chevrolet, Dodge or Maxwell $13.95. All other cars $16.50 with plate glass lights. Ford regular side Curtains, $5.95 up. For r cars $11.50 up. Ford Seat Slips, Roadster $3.15, Touring $6.25, or tailored, Roadster $6.20, Touring $9.90, other cars $4 tw $ Ford Cushions $5.95 All goods 1S car manufacturers use and guaran- teed to fit Printed instructions given how to apply. Send for samples Prices de- livered at your door. Equipment Co., 30 Canal, Cincinnati, Ohio AUTC Parts for any car We save you 10 to 90% and ship same day order is re- i We have gears, shafts, bearings, rings, pistons, pins, rings and bushing< ler head gaskets, top slip roofs, clutch leathers, radiators, coils, magnetos, Atwater Kent, Connecticut, Delco and Remy igni- ‘ystems and parts. When you want ito parts, write us giving make, model d parts wanted. We have it, will get it, or it is not made. Guarantee to please sou or will refund your money. Auto Tire and Parts Co., 501 Broadway, Cape Girar- deau, Mo. PER Cent Saved on Auto Parts

W ave you up to 95 per cent on slightly used gears, axles, bearings, springs or motor parts for every make or model car, we furnish new parts at savings up to per_ cent; send for our prices or order t from this ad; all parts guaranteed to £g complete satisfaction or your money re- f ed in full. Our reference Packers ite Bank of Kansas City Rrown Auto king Co., 1803 East 18th St., Kansas { Mo. \IK Compressor with Tank and Hose $50. With Motor $72.50. Suitable for private public garage, tire shop, painting or aning. Also Motor in the Head Buffer e size $18.50, Shop size $25. Garage $106. Battery charging outfit. home garage size $14. Send for our large 100- catalogue, describing all kinds of Air pressors, Vulcanizers, Garage and Bat- utfits. Equipment Co., 21 Canal St innatl, Ohio.

AGENTS Wanted. Colpin Magneto Re- Charger charges any magnet, charges Ford Cars, Trucks and Tractors without remov- ing parts, all from A. C. light socket; guar- anteed to do perfect work or money re- funded. $32.50 with order, balance $5.00 per month for five months. Liberal dis counts. Magnetizer Manufacturing Co., 150 W. Florence Ave., Los Angeles, Calif GARAGE, Repair or Harnessmen: Write now for complete proposition that enables you to quickly and profitably make new or repair old flat belts for cars, trucks, tractors or small shop machinery. See our adv. on page 150. Lakewood Fabric Belting & Mfg. Co., 1518 W. 117th St., Lakewood, Ohio AUTOMOBILE Owners, Garagemen, Me- chanics, Repairmen, send for free copy of our current issue. It contains helpful, in- structive information on overhauling, igni- tion troubles, wiring, carburetors, storage batteries, etc. Over 140 pages, illustrated. Send for free copy today Automobile Digest, 505 Butler Bidg., Cincinnati. PROTECT Your Rights. Write for “‘Rec- ord of Invention,’’ which contains form to establish evidence of conception of your in- vention, Prompt personal service. Pre- liminary advice without charge. J. Reaney Kelly, 612-G, Columbian Bldg., Washing- ton, D. C. PRONTO Series Gap Mica Spark Plugs Guaranteed life of motor. Positively shoots through oil 100° Government Air Mail Service test. Real dealers and distributors write. Pronto Mfg. Co., Omaha, Nebr.

VULCANIZING and Repairing is a pay- ing business. Forty million tires need re- pairing every day. Make big profits in tire repair. Easy to learn. Instructions free. No hard times, Always busy. Get into this moneymaking business quick! Plants $200 up. Write for free catalog. Equipment Co., 1 Canal, Cincinnati, Ohio.

AUTO Owner Tire Agent wanted each locality to use and take orders for hand- made Mellinger extra ply and cord tires: guaranteed by bond for 8.000 and 10,000 miles (no seconds); shipped prepaia on ap- proval ; get your tires free; no capital or experience required; make $100 to $300 weekly. Write for wholesale prices and sample section, Mellinger Tire Co., 929-K Oak, Kansas City, Mo.

AIR Compressors—Genuine Brunner Com- pressors, new, on very atractive terms; send post card Brunner Mfg. Co., Dept. A, Utica, N. Y.

AUTOMATIC Compressors, Grinders, Bat- tery Chargers, Motors. Unusually easy a Write us your needs. Hobarts, Troy. Ohio.

ELECTRIC Service and Battery Stations send your jobber’s name for booklet en- titled ‘‘The Testing and Repairing of Auto motive Electrical Equipment as a Profitable Business." Electric Machine Corporation, Indianapolis, Ind

AUTOMOBILES

SELL the new B. & C. Pedal for Fords. Positive neutral without guesswork. FElim- inates use of emergency lever. Send for

literature, Burnham-Cote Co., Holyoke, Mass. LEARN Automobile Painting, Retrim- ming Business at home No previous ex- perience required Profitable work every- where. Worth many times the cost. Auto- finishing Co., Sheboygan, Wisconsin. RUST-I-CIDE Chemically Kills Rust Automobiles: Body, Fenders, Rims, Springs. Bottle postpaid 35c. Sales Agents’ oppor- tunity here. The Rusticide Co., Cleveland, Ohio. AREND Piston Rings—Patented Sept. 27 1921. Adjustable. Send for circular and price list. John Arend, Mankato, Minn. _ AUTO Parts, Tires, Tools. Factory-made Pistons, Pins, Rings. National Accessories Co., Box 404, Detroit. SALESMEN—Motor Oils. tlake Oil Co 94 Ives Street, Waterbury, Conn ike “HOW To Sell Patents’’ free. Patent News, F, Washington, D. C, MAGNETO Charger, Guaranteed; Free Trial. Reliable. 426 Mary St., Utica, N. Y SAVING fuel and oil, stopping oil pumping, decreasing carbon deposits is accomplished by Zelco, the zine-coated pis- ton ring, price 45c each; peened by special process. If your dealer doesn’t handle, order of Zeleco Piston Ring Division, Zelnicker, St. Louis. Distributers wanted.

STORAGE Battery Charging Earns Un- usual Profits, using HB Chargers $20 starts. Balance payments. Hobartsons, Troy, Ohio. FREE Inner Tubes. Patent. Photographer, Ohio AUTO Motors Supplies: Buick—Michigan —Stoddard-Dayton—E. M. F.—Cadillac— Overland—Continental and Buda Motors All types, $50.00 each and up. New Dixie Magnetos $20.00. Splitdorf High Tension Magnetos $10.00. Kellogg Pumps $3.50. Auto-Lite generators, new, $10.00. Air Gauges 65c. Remy Ignition Coils, new, $3.00. Electric and gas headlamps, coils, distributor heads, air compressors, etc. Write for catalog. Motor Sales Dept. 15, West End, Pittsburgh, Pa

Veteran's War National Home,

“AUTOMOTIVE Service Monthly.” a pocket-size trade paper containing the best reading matter on modern practice in ser- vice work that it is possible to secure and a review of the articles on service and re pairing now appearing in all the motor papers. Every foreman or superintendent should read every issue to keep posted up to date on his job $1.00 a year. Send order and will bill up with first number, or send cash with order and a useful smal! tool souvenir will be included F. M Dampman, 98 Park Place, New York.

AUTOMOBILE Owners, Garagemen, Me- hanics, Repairmen, send for free copy of our current issue It contains helpful, fn structive information on overhauling, igni tion troubles, wiring. carburetors storage batteries, etc Over 140 pages, illustrated Send for free copy today Automobile Digest, 506 Butler Bidg., Cincinnati

DYKE’'S Automobile Encyclopedia con tains the greatest array of automobile facts ever published in one volume. Several sep arate books containing the same informa tion would cost in the neighborhood of $21.00 New enlarged edition, 968 pp., 3362 illus. Cloth $6.46, American Morocco, $7.96 postpaid Popular Mechanics, Book Dept., 6 N. Michigan Ave., Chicago.

STUDEBAKER Four-cylinder seven-pa senger touring, like new, $440; accept $200 eash, balance twelve monthly notes Miss Kay, 499 East 163rd St., New York City, is Ue

AUTOMOBILE Repairman’s Helper. In Two Vols, An excellent new work that gives every operation required to adjust or repair the troubles likely to be found in all Standard cars Vol. 1 Repairshop Prac tice, Passenger Cars, Trucks. 535 pp., 417 figs. Price $3 Vol. 2, General Shop Prax tice, Passenger Cars, Parts and Acces sories 528 pp 128 fics Price $3 Popu- lar Mechanics Book Dept 6 N. Michigan Ave., Chicago

PATENTS—Write for our free illustrated Guide Book and Evidence of Conception Blank. Send model or sketch and descrip- tion of your invention and we will give our opinion of its patentable nature Highest references Prompt service Reasonable terms. Victor J. Evans & Co., 185 Ninth, Washington, D. C

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POPULAR MECHANICS ADVERTISING SECTION FOR FORD OWNERS JULES Oil Circulator stops any Ford | A WONDERFUL opportunity to learn to from pumping oil, doubles oil mileage. | fly by our uew method, includes three bh FORD Owners. Stop your Ford from Guaranteed. $4.00 each. Special intro- instruction in the air and one month Chattering by installing Bredar’s Ball Shim, ductory price, $2.00, C. O. D. Money back | tensive shop course, complete at $1( Price $1.50 _Write for information and if dissatisfied. Electric Machine Corpora- Heath Airplane Co., Chicago, Til. Agency ty i oe Bredar’s Son Mfg. Eon, Indianapolis, Ind FOR June we offer the greatest bars 0., Toc sland, FORD Owner: Should you lose your Igni- in the history of aviation. Dope $ FORD Car Repair Book sent free. This tion Key, “‘don’t get stuck on the road”’ ; turnbuckles, all sizes 25¢c; aero clot! complete, well illustrated, valuable book ex- be prepared. Learn the secret of: running | yd.; shock absorber 5c ft.; Curtiss or G plains in a simple way the Causes and your car without the ignition key. Full in- motors $200.00; new propellers $18.00: Cures of Overheating; Repairing Ford struction for a dollar bill. Fred Brewer, pins 2c; steel ‘tubing 5e ft.; airplane Timer; Curing Piston Ring Troubles; Car- 129 Park Place, Brooklyn, N. Y. steel 5c Ib.; other wonderful bargains buretor Adjustments and Repairs; Connect- “READ’ Ball-Bearing Clutch Screw el Gan. Heath Airplane ( ing Rods; Transmission Troubles; Care and | doesn’t drag, it rolls. Makes Hand Brake uicago, Sit. i Repair of Rear Axle; Stopping Axle Grease | Operate Easily, 20c (coin) Address AERIAL propeller attachment for boats oe sive Cw > —— ally every os *‘Read,’’ 78 Kingston Ave., Brooklyn, N. Y. Blue —— only, T5e. Aeronautica! hase © ore ar epairing. Send 2oc : LEX Starte > saci plies ulletin, 4e. Ostergaard A coin for three months’ trial subscription and Pn —inw hw A ay Fe Works. 4269 Worth oeneennets Q t aluable > book free ¥ . 7 . *° . i. - gy EL Re A BIGGEST, best catalogue Model Acr gomery Bldg., Milwaukee, Wis MOTORCYCLES. BICYCLES AND planes, Parts and Supplies; Se postpaid aetz. =. : SUPPLIES Ideal Aeroplane Co., 67% West Hi SPEC IAL Offer . Ford and i Own- New York. a era! 100% Saving! Factory to User. 91.35 EXCELSIOR, Henderson parts; new ot INVENTORS desiring patents should wri brings postpaid 4 Genuine Blue Flame . Spark Plugs. 10 for $2.50. Money back if | US¢d—parts lists, 10c, Expert repairing. | for our Free illustrated Guide Book and is ‘ net satisfied. Crimp Grip Company, Belvi- Excelsior Motor Supply Co., 100 N, 12th dence of Conception Blank. Send moe! or dere, Til. Dept. St. Louis, Mo. caetch = — of its patentable na a BREECHES, puttees at exceptionally low ure. est references. Prompt servic WONDERFUL Mayer as a prices. Write for Bargain Bulletin. Union | Reasonable terms. Victor J. Evans & ( mileage; easier starting. Sold everywhere | Merchandise Co., 100 Summit St., Toledo, | 187 Ninth, Washington, D. C. since 1910. Former price $18.50. Our price Ohio while they last, $7.75. Send no money, just — — - name, address, and state if car has self- - as - 908-1908 Twin Indions. WELDING starter, Pay postman on arrival. Order arleys. s L aggett, Barnesville, Md. today Jaffe Radiator Co., 741 W. Van HARLEY-DAVIDSON, electric, 3 speed, vo . | Buren St., Chicago. fully equipped, $135.00; also other makes ae Sncoclenedio—& complet; | - - . ‘ ~ « on wn on B oe FORD Sport Model Fenders, Something | Write for our bargain list and our casy exy-acctyiens. b BM. boy _ ons a aie . Ask f “ let payment plan. Lavin Motor Supply Co., S new and very classy. Ask for complete | j959 N Napa St., Philadelph Pa sistance and thermit. Welding of al! w: description. Star Supply Co., Lima, Ohio. — ee ac pas. : able metals fully discussed. 326 py FORD Speeders 70 to 80 miles per hour SHAW Motorcycle, Super H Model, 2- ills. The accumulated experience « . | One ye a how. D. L. McCreery, inch tire, chain drive, new, never used, in | welding brains of America is yours for $ + ora Colo y os s * | original crate; $110. Roy Bates, Janesville, | Money. back if not satisfied. Pr KEEP Cool. Breeas brackets make the | — BUILD j mee: | ee ee Sh Pe A LE ool. € ckets P , J wn sidecar, trailer. heels “hicago. windshield adjustable. Prepaid $5 Agents. 28x3, with “pall bearings, $6. All arts MOTOR Grinder and Tire Buffer i pee oy — See. eee: ee snenp. Unwin, 305 Broadway, New York, | matic Compressors, Battery Chargers, \i incoln, Neb |! 4 tors. Unugually Easy Payments. Writ: FORD Magnetos Recharged in Five Min- BARGAINS in used motorcycles, new and Hobartts, Troy, Ohio. utes without removing any Secret exposed Anyone can do materials you already have. Nothing extra to buy. Fully charged magneto removes cause of ignition troubles, gives easy start- ing, bright lights, more power, saves gas. Complete simple instructions and wiring liagram 50c coin or money order. The Auto Electrician, Box 261, Middletown, N.Y. YOU don’t have to get under or raise the hood, U-See-It shows exact amount “ oil from the driver’s seat day or ni Built like time-tried gauges in the big a: Endorsed by experts. Nicely finished, strong, durable; special patented features, easily installed. Absolute money - -back guar- antee. Postpaid in U. S. $4.75. Oil-0O- Meter Mfg. Co., 420 Sycamore St, Evans- ville, Ind. EXCLUSIVE territory open now. Noth- ing placed on market in recent years im- proves driving a Ford car as our Duplex Gear-Control A permanent utility Will outwear the car. Holds gear in neutral or low. Makes hill-climbing a pleasure instead of hard work. Retails for $6.00. For par- ticulars address Morris & Burns, 278 Twelfth Street, Oakland, Calif. PROTECT Your Motor; save time, clothes and temper with our water-proofed, detachable belts for Fords. Regular price 50c each. Six belts sent postpaid for $1.25. State model when order- money, superior, used motor wheels. Lists free. Seeber-Hof- heins, Buffalo, New York WHY buy a used motorcycle? A new Cleveland costs only $185. See page 139. POWERPLUS Indian twin, fine condi- tion, $75. Geo. Laatch, Altamont, Il. BALTIMORE Police Indians, ‘20 model Elec. Equipped, $160.00; °21 Model, Elec. Equipped, $210.00; 22” Truss Frame Bicy- cles, $23.00. Howard A. French, Baltimore, SEND for big list of slightly used motor- cycles on our easy payment plan. Howard Cycle Co. Broad St., Trenton, N. J. 152 _N. USED parts for all motorcycles cheap. State wants. Schuck Cycle Co., 1922 West- lake, Seattle, Wash USED and new parts, Indian, Excel- Harley, Reading, Thor, Henderson, Get our price lists. Kingshighway Cycle Co., 1166 North Kingshighway, St. Louis, Mo. a DON’T buy a Bicycle Motor Attachment until you get our catalogue and prices. Shaw Mfg. Co., Dept. 27, Galesburg, Kan. NEW motorcycles have been reduced 10%. Our prices have been reduced 35% Send for big bargain list of rebuilt motorcycles. Western Supplies Co., 359 Hayutin Bldg., Denver, Colo. USED motorcycles, new and used parts; ing. Money refunded if not entirely satis- oan aan See our adv. on page 150. Lakewood ae us. Mahowald Cycle Co., Mankato, ‘abric Be Mfg. Co., 15 f t . a Soe Chie — BOYS, build your own cycle car! Send — a 25c for building plans and list of parts. INVESTIGATE—Ford Owners, Dealers We can supply motor with clutch and all and Salesmen: We have a Ford low- parts at low prices. Shaw Mfg. Co., Car speed and —- ne for all — Ford Dept., Galesburg, Kan Cars and rucks. Eliminates the neces- - sity of holding low-speed pedal down. Re- Pe gt a Soe — tail price $3.00. Good proposition for wa Fg mney 3 a. z i > dealers. Huck Low Speeder Company, Vir- | “uncle Piston Co., Muncie, ind. ginia, Til CYCLO ‘“‘Modified Vapor’’ System is the AVIATION only all-year hot-spot manifold automat- ically regulated without moving parts. Big NEW Standard 3-seater plane, 100 h. p. gas saving Cyclo Manifold Co., South motor, full set of instruments, ready to High St.. Akron, Ohio. fly; immense bargain at $975 Aero Ex- THE B. & C. Pedal for Fords. Elim- | S22%ge, 38 Park Row, New York, N.Y. inates use of emergency lever and finds THIS Is Your Chance of a lifetime to neutral for you. Salesman wanted Send become an Airplane Expert. Write Leslie for literature. Burnham-Cote Co., Holyoke, Coombs, Chief Engineer, Central Airplane Mass. Works, 3254 Lincoln Avenue, Chicago. CONVERT Ford into 14%-ton truck. Com- plete auxiliary springs $20. Unwin, 305 Broadway, New York, Zz. SPEEDSTER Fans Don't fail to see “*Red-I-Kut’”_ad. Page 141. LACEY Patent Sense. See page 158. HEATH propellers represent the most effi- cient method of aerial drive. Each pro- peller individually designed for the particu- lar work to be done, as laid out by Amer- ica’s oldest aeronautical Engineers. Pro- peller sine 4c. Heath Airplane Co., Chi- cago, NY BOOKS AND PERIODICALS STUDY Human Nature, know peu make more money, Send 10 cents “‘Personal Power,’’ a little book that i the way. Address, Progress League, ‘ Unian Square, New York, N. Y. “36 ACCOUNTING Problems Solv P. A.”’ Cloth bound, loose leaf original, up-to-date, valuable. Pre $1.00. Walhamore Company, Lafayette B!\g Philadelphia, Pa. BOOK on boxing and home exercis Jock Malone, 25c. Progressive Pub! St. Paul, Minn. 1,000,000 INDUSTRIAL Facts Ca tions, Receipts, Processes, and Secrets for every business are contal: the 1016 page book ““Moore’s Univers \ : sistant and Complete Mechanic,”” 5 gravings, cloth. Price $2 postpaid |! lar Mechanics Book Dept., 6 N. M R : Ave., Chicago. PROFESSIONALS—Palmistry and !) f tionary $4. Criginal Master Key $5. « ' logues 2c. Sovereign Company, 16! i more, Buffalo. BOOKS All kinds. Lists. Hig A2241 Post Street. San Francisco, ( . OUR new catalogue listing over five i dred carefully selected practical bo - der eighty different subject groupi be sent free upon request. Popula ( chanics Book Dept., 6 N. Michiga Chicago. “4 CONCENTRATION Learn how your mind upon one subject despit ruptions. Wonderful possiblities psychology of thought contro! be Another book, “‘How to Conquer |! ! shows how to avoid worry, doubt ‘ \ ness; gain contentment, 50c. Bot - Satisfaction or money back. Cent: lishing Co. 108 W. 34th Street, ZB York, N AGENTS- Big date Radio books. sition. Norman W. Henley Publish! 2 West 45th St., New York. | ELECTRICITY Taught by expert while you learn at home; electrica proof lessons free; your success gua profit selling ov! Write for agen! and position secured. Chicago Ene Works, Dept. 51A, 2144 Lawrer Chicago. TOY maker book, 64 pages, il! Postpaid 10c. Western Puzzle W Paul, Minn.

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ar to hx F h Or d write rd Ev adel or ble na service & lets POPULAR MECHANICS ADVERTISING SECTION 35 LATEST Magic — Professor Hoffman, world-famed authority. New stunts, card tricks, sleight of hand Handsomely hound. Illustrated, $2.15 postpaid. Spon & Chamberlain, 120 P. M. Liberty Street, New Lork 4 a ce ANY book you want at r cut- rate prices. Don’t buy until you see our bargain list. Send postal for free copy. Midwest Book House, Dept. 20, 58 West Washington St., Chic ago THIRTY-FIVE Cent Electrical and Me- hanical Books Fully illustrated. Other popular subjects. Send for list Spon & Chamberlain, 120 P M Liberty St., New York AMBITIOUS Writers send today for Free copy America’s leading magazine for writers of photoplays, stories, poems, songs. In- structive, helpful. Writer's Digest, 603 Butler Building, Cincinnati, Ohio. LIGHTNING Cartoonist’s Book, Secrets Tricks, $1.00, Christman, 2925 Euclid, Kan- sas City, Mo. PLANS for Poultry Houses. All styles. 150 illustrations; secret of getting winter eggs, and copy of “‘The Full Egg Basket.’’ Send 25 cents. Inland Poultry Journal, Dept 74, Indianapolis, Ind, INDU STRIAL Alcohol, Wright’s book everybody wants. Full directions for mak- ing with drawings of necessary apparatus, $2.50 postpaid. Spon & Chamberlain, 120 P.M. Liberty Street, New York, N. Y. INSTRUCTION Book (for shop use) on vulcanizing auto tire, boots and shoes, $1 pili. Equipment Co., 3 Canal, Cincinnati, ¢ PICTURES, POSTCARDS & NOVELTIES MEMBERSHIP and dozen girl beauties, tureau, 233, Champaign, Il. SURPRISE Friends. Tour Rocky Moun- tains while staying home. Ten magnificent views 30 cents. Return for mailing. Great fur Hadler, 4085 So. Broadway, Denver, _ TRU E-BLUERS _ everywhere. Exchange tals Organized 1908. Membership: ur, $1: half, 50c; quarter, 25c. Hundreds listings, 10e. Ed Ericson, 622, Elroy, Wis. 7000 STOCK Magical Goods. Catalogues lic. Address, Gilmagico, Morgan Park, Ill TRICKS, Puzzles, jokes, magical appara- tus, plays, stage supplies, mind-reading acts, and sensational escapes 160-page illustrated professional catalogue, 1l0c. Oaks Magical Co., Dept. 548, Oshkosh, Wis . 200 KINDS iron, wood and wire puzzles Leader and illustrated list l0c. Western Puzzle Works, St. Paul, Minn. 0 FREE. 7 beautiful French Colonials to hew approval applicants. Frank Hadley, Plainfield, N. J 1, 1% AND 2c Approvals Company, 1 Weld St., Weld Stamp New Bedford, Mass. BRITISH Colonies, 50 different 20c. Browne, 111 Willow, Wollaston, Mass 50 DIFFERENT Wars 10c. F. Buffham, Lake Ave., Racine, Wis MAGIC—Tricks, Books and Supplies. For Amateurs as well as the great professionals Anyone can learn through our instructions. Feature Acts in Mind Reading, Spiritualism, Rope Ties, etc. Large illustrated Profession- al Catalog. 10c. Chicago Magic Co., Dept. B. 140 8. Dearborn St., Chicago, Ill. 250 MAGIC Tricks 25c. Big Catalog 2c. Harvey Teeple, Decatur, Ind. STAMP COLLECTING START a Stamp Collection—65 different stamps from 65 different foreign countries, including Africa, Asia, Australia, Europe, West Indies, ete. Our pamphlet which tells “How to make a collection properly,”’ and price list of albums, packets and sets, all for only 16 cents. Queen City Stamp Co., Room 36, 604 Race St., Cincinnati, O. EXCHANGE Postage Stamps with Friends in every country. re 25 cents International Stamp Club, 4002 Brooklyn Ave., Seattle, Wash., U. S. A LIBERAL Offer: 500 mixed U. S., 1,000 hinges, 100 diff. foreign, Bargain Stamp paper 6 months for 25c. Weatherby, Medina, Ohio. PACKET 1,000 different Stamps (Fine). While they last, $2.80. (Approvals.) W Leppert, P. O. Box 438, Far Rockaway, ™% 4 STAMP News of the world. Send for cur- rent issue, l5c “The Albermarle Stamp Collector,’” published monthly, Bethlehem, Penna. $1.00 WORTH of Stamps for 10c. Hull Station H, New York, 150 NICE Stamps 3c No approvals Alvin Johnson, Hawarden, Towa. 1,500 DIFFERENT stamps $5.00; 1,000. $2.50; 500, 75c; 300, 45c, Fred Onken, 630 79th street, Brooklyn. FREE—New Europe, 20 diff., to appli- cants for my %. %, 1, and 2c approvals; also the higher-priced stamps at 50% disct. Send reference and receive extra premium Chas. T. Egner, 1335 Pike St., Philadelphia, a. FREE, 25 U. S. stamps with 60° approv- als to reliable parties 100 different U. 8. 25c. C. Seidenberg, Merton, Wis. FRENCH Colonies Free—Beautiful Pic ture set, including Native Chiefs, Tigers, Pictorials. 2c Postage. Empire Stamp Com pany, Toronto, Canada. 100 DIFFERENT Stamps and Perforation Gauge for 10 cents. I. Sonnee, 675 Ivy St., St. Paul, Minn. 3 NYASSA Giraffe stamps free to approval applicants. Wilmar Edgar, Cherokee, lowa 200 STAMPS and subscription Stamp Magazine 15c, Harvey Teeple Decatur Ind. STAMPS, 50 Varieties, Africa, Brazil, Peru, Cuba, Mexico, etc., 10« 50 different U. S., 25c; 1,000 mixed, 40c; 1,000 hinges, 10c List free C. Stegman, 5948 Cote Brilliante, St. Louis, Mo BEST one-cent approvals in America F. P. Hand, 1117 So. 60th St., Philadel- phia, Pa 1OIN Live Postcard club: Sample paper, catalog, 10c. Harvey Teeple, Decatur, MOROCCO, 42 different, catalog $3.00, 60c. Greaves, 3 East Crescent, Rotherham, England. Ind, “BOLIVIAN Iaicky Beans.’” something original; each bean everlasting, natural, brilliant, scarlet and black; for earrings, whes, watch chains, rings, bangles, etc., ‘0 per dozen. Address, Weeds, Chaca- o 430, Valparaiso, Chile, South America. YOUR portrait copied on a handkerc hief si $2.00 Acme Service, 733 Cen- il Ave., ‘Los Angeles, Calif. GAMES AND ENTERTAINMENTS Vi NTRILOQUISM taught almost anyone at home. Small cost Send 2c stamp today for particulars and proof. George W. Smith, — om M-287, 125 N. Jefferson Ave., Peoria, nois PUZZLES, perplexing peg, Wire, three-way wood, figure eight interurban trolley, ult crescent, 25c each, $1 all. Address, Puzzle King, Evans City, Pa. ey a 1c disappe aring coin trick and Magic og, 25¢ Western Magic Co., Box 606, on C, Los Angeles, Calif. SNEEZE powder, greatest fun maker on th sottle, 10c. C. Fenner, 2401 Jeffer- Louisville, Ky ENTE aa get Books, Puzzles, J Catalog free, Wi ipple, Chicago. Tricks, Anderco, 4047 North “MARGO” Psycho-Sphere. The greatest tt novelty out Everybody wants one Descriptive Circular free. James T. Herr, Desk C, 2919 W. North Ave., Baltimore, i 67 TRICKS, 400 Jokes, Riddles, Toasts, Fortune Telling Secrets, Funny Readings 1 big catalog, 10c. Ideal Book Shop, INC North Robey, Chicago MAG “ ~ Trick Cards and Tilustrated Cata- ‘ V. Youngblood, 16 Grove, g ! urlotte, Ri Cc PACKET Desirable Stamps to Approval Applicants. Goldstein, Burdette Ave., Cin- cinnati, Ohio. STAMPS—50 different Jamaica, Vene- Zuela, ete., only 7c; 100 all aif. 10e; 1000 all diff., $2.50; 100 diff., I ny 1000 Hinges, 10c; 50 per cent apt Tne with every order. List free. I buy stamps. Write L. B. Dover, Dept A Longmont, Colo UNITED STATES Columbian Issue tc- 10c. 8&8 var. 22c. Postpaid. New United States Price List free on request Midwest approvals contain honest value stamps Write today for a selection. Address, Mid- west Stamp Company, Kemper Building, Kansas City, Mo 115 DIFFERENT Foreign Stamps, includ- ing Zambesia, Zanzibar, Argentine, Georgia, Herzegovina, Holkar, Liechtenstein, Mada- gascar, Mozambique, Newfoundland, Rou- mania, Montenegro, Ukrainia, Venezuela, 20c. Liberty, 3974 Arsenal, St. Louis, Mo FREE! Finest Perforation Gauge with beautiful price list. Ask for approvals. Ad dress, Allen Sears, Dept. P, 220 Lathrop Building, Kansas City, Mo 25 FOREIGN Stamps, cat. from 3c to 20c each, total at least $1.50, for 40c. Mrs Louise Kellogg, W. Hartford, Conn FREE! 30 Different Unused French Colonials to applicants for approvals who send 2c postage. Nickles, 122 Florida Ave., Washington, D. C, 1,000 HINGES and 25 U. 8S. free with approval request and 10 cents St. Elmo Stamp Co., 4501 N. Ashland Ave.. Chicago. CHINESE Famine Set, also 50 different French Colonials, for 25c. Jacob Fischer, 1539 North Lawler, Chicago FREE. for approvals sending 2c. precht, Valparaiso, Ind. 100 different stamps to applicants Richard P. Lam- R EDUCED Prices! Tricks, Jokes, Novel- 8. Catalog 6c. Lyle Douglas, Station A, alla Texas, 1,000 HINGES 7c to applicants for net priced approvals. Excel, 939A Webster Ave., Chicago SWEDISH Stamps free Approvals % postage F. Seebeck, 1957 Toronto St., Re gina, Canada. 100 FOREIGN Stamps sent free. Cornish } A Company, Schenectady, N. STAMPS Free—War Stamps, Surcharged, Unused, Pictorials, British, French Colonials 2c postage. Midland Stamp Co., Torouto Canada, 158 GENUINE Foreign Stamps—Mexico War Issues Venezuela, Salvador and India Service Guatemala, China, etc., only 10 Finest approval sheets, 50 to 60% Agents Wanted tig 72-p Lists Free We Buy Stamps Estab. 29 yrs Hussman Stamp Co., Dept. 54, St. Louis, Mo. LIKE Triangular Stamps? To introduce our Sudden Service Approvals we'll send triangular Fiume, set China ships, large $1.00 United States revenue, also packet 50 foreign, millimetre scale, perforation gauge, ruler and bargain lists for only 9c! Fen- nell Stamp Company, Dept. P, Fullerton Bidg., St. Louis, Mo. FREE! Sectional Loose Leaf Postage Stamp Album at the rate of 8 pages each month given with subscription to our monthly Journal Send two-cent stamp for pros pectus, United Stamp Co., 140 8. Dearborn St., Chicago, lil BIG Variety Packet Foreign Stamps free for 2c postage. Gray Stamp Co., Station E., Toronto, Canada STAMPS sent on approval at 70° dis- count Reference required Emory Renoll Hanover, Pa. STAMI’S Free provals, John P 24 VARIETIES Cuban stamps, 10 cents List of 6,000 low-priced stamps free. Ad- dress Chambers Stamp Co., 1LIP, Nassau St., New York City, N. Y¥. Ask for money-saving ap- sorresen, Cedar Falis, la 105 CHINA, etc.. 2c. Album (500 illustrations), 3c. Sta. A, Boston. stamp dictionary, list, Bullard, 55 ALI Different Stamps, including China, Japan, French Colonies, etc., given to ap plicants for our high- grade approval selec tions. Send references and 2c stamp to the Edgewood Stamp Co., Dept. H, Milford, Conn.

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36 20 UNUSED stamps Postage, 2c. Fisk Stamps, All different Toledo, Ohio free PACKET of 23 stamps, no two countries alike. Packet hinges. Set of $1 and $2 U.S Rev all for 5« Mention paper Miam) Stamp Cr Toledo, Ohio STAMPS, 20 Postage 2c, Mention Co Toledo, O different, free Quaker Stamp unused, all paper FREE 10 different Scandinavian, milli- metre scale, gauge, book, lists, etc., to all sending 10c for 57 different Siam, Ceylon, (Juatemala, etc 200 different, 25c; 300 dif- ferent, 60c; 100 different U. S., 25¢. Hawk eye Stamp Ce Cedar Rapids, 39, Ia 100 DIFFERENT from 30 different cour tries, 5c. Lufbery, Yalesville, Conn, RARE COINS SEND for thi iw—Civil War Cent historically nteresting, and large 50 page illustrated coir iutalog for only ten cents, This offer is just to get acquainted You'll be surprised how pleasant and profitable you'll find « Hlecting Start now B Miax Mehl, Numismatist, Mehl Bldg., Dept h Fart Worth rexas zargest rar oin establishme in the United States WILL Pay I y Dollars Cash for ckel of 1913 with Liberty Head Watch your hange We pa ash premiums for all rare coins Send 4c for Col Circular Numismati Banh Dept H, Fort Worth Texas CALIFORNIA gold, $% size, 27¢ fle size, 53 piece and catalogue, 1 Ad- dress Norma Shultz ‘vloradk Springs Colo HALF Dollar Sfze California Gold, 52c¢; Flying Eagle Cent, list, 10 Holco, An- nawan, Il CALIFORNIA Gold, Quarter size and Co- Jlombia nickel coin only 30« Italy 20 cents and catalog 10 Homer Shultz, King City, Mo. OLD coins. large Spring selling catalogue of coins for sale, free Catalogue quoting prices paid for coins, ten cents William Hesslein, 101B Tremont St., Boston, Mass. $2 TO $500 Each paid for hundreds of old coins Keep all old money Send 10 cents for Illustrated Coin Value so0ok 4x6 Guaranteed Prices It may mean your For- tune Address Clarke Coin Company, Ave 2, Le Roy, N. Y¥ FOR BOYS BOYS, get ready for the Fourth. Make powder for colored lights, green, pink, red, blue, yellow, white; also invisible ink. Re- eeipts each 20c, or all for $1 Edahl, 2854 Van Buren, Chicag 500,000 YOUNG hares wanted this year from lub memb only Join National Club now, $1 Get $20 paid Giants free We buy young Send stamp. sulletin Board tox SS, Elkhart, Ind, BOYS!—You wh ke grippin thrilling stories of achievement will want to read “Victories of the E: er,”” a book that tells in a way you c% understand it how the great feats 1 railroad engineering, building great bridges, ships, dams, canals harbors, tunnels, mining, et have been a complished A. Williams, 487 pp. 259 ills Price $2 ystpaid Popular Mechanics took Dept 6 N. Michigan Ave Chicage PLAY mouth gan It’s easy Com- plete instructor, 25« Instructors for violin piano, tenor bank ocarina ukulele or drums, 2k G. Elsea, Bowling Green, Ohio. INEXPERIENCED, I built radiophone following simplified diagrammed _instruc- tions Just out $1 Box 263, Los An- geles, Calif. ELECTRICITY Taught by experts; earn while you learn at home; electrical book and proof lessons free your success guaranteed and position secured, Chicago Engineering Works, Dept. 51A, 2144 Lawrence Avc., Chicago BOYS te te aeroplane free. Hurlbut Ave., Get Aert Mich flying model Wr Shop, Detroit CAMERAS AND PHOTO SUPPLIES Professional finishing Prompt ser- KODAK Pictures! amateurs Lowest Your films are entitled to good work- for vice prices manship We guarantee it Developing— Printing Enlarging Copying—Coloring Framing—Mounts and Folders ree valu- able booklet an photography and price list with your first order Any size roll devel- ped 10: Six 2%x3% prints 2% Six %4x5% prints 3k Beautiful 8x10 enlarge ment mounted 65« Mail your films and be sure of good pictures Photographic Insti- tute Dept. M, Wedgeway Building, Schenec- tady, N. Y. JUST Published—Our new complete 128- page cataicg and bargain book of new and ised cameras and supplies Our goods are guaranteed finest quality obtainable. We have thousands of satisfied customer Write at once for this bargain bulletin, just hot from the press. Address Central Camera a 124 S. Wabash Ave Dept. E 58, Chi- ag lil ONE roll film developed and six print made for twenty cents Expert workman- hip at ordinary prices Pioneer Studio, Vinton, Iowa. PHOTO Mounts for Amateurs We are the only manufacturers selling direct to amateurs exclusively Therefore, all Mounts and Folders purchased from us are of un- xcelled quality and artistic perfection, at a price most pleasing to you Send stamps, five cents, for sample and prices (State Brown or Gray.) We know your decision will be an order I. P. C.-Universal Cor- poration, 270-276 Hudson Avs Albany, N ~ KODAK Finishing. Not the cheap way, but the most reliable Our Quality Work insures best prints from every negative. ‘iet particulars and List of Prizes. Send us your orders Moen Photo Service, 21-A LaCrosse, Wis, SEND your next Roll Film and 20c or six Film Negatives, one hand-tinted free Address, Az-U-Lyk-M, Dept. C, Bristol, Vt. EXPERT Photo Finishing, any size roll l#e prints, 3 for 10c. Frank C, Miller, 1110 Franklin St., Cedar Falls, lowa, LUSTRE Prints—Best yet Sample roll finish, 25c¢ Mounting corners free Reed Studio, Norton, Kan. DEVELOPING Prints 5c cash with order. No stamps. Address, Harry Nichol- son, Photographer, Castleton, N. Y. 10 KODAK enlargement, beautifully $1.00. Kodafin, 387 Belleview Place, Wis. CAMERA $7.50 Durso, 25 Mulberry, 8x10 colored Milwaukee, list City, other bargains New York 1x5 free N GLOSSY Prints three cents, Rolls oped seven cents MacFarlane's 4150 Hamilton, Cincinnati, Ohio. devel- Studio, Daguerreotypes or Faded OLD Tintypes, Pictures of loved ones can be restored so as to produce beautiful enlargements and perfect likenesses under our new process, Individual pictures may also be produced out of groups Satisfactory results guaran- teed. Prompt work. Roanoke Photo Finish- ing Co., 512 Bell Ave., Roanoke, Virginia BIG Money Saved on Photographic Lens and Apparatus—goods exchanged; repairing done Ralph J. Golsen, 1128 Argyle St, Chicago, Dept. P. BASS Camera Bargains are known the world over Write your needs Largest stock of Graflex, Kodaks and Motion Pic- ture Cameras in the world Bass Camera Company, Mail Order Division, Chicago, Il) KODAK films developed and _ finished with attractive margin designs 25c. Some- thing new. New England Photo Service, Box 1202, Boston, Mass. Write for Free how “HAVE You a Camera? sample of our big magazine, showing to make better pictures and earn money. American Photography, 790 Camera House, Boston, 17, Mass. POPULAR MECHANICS ADVERTISING SECTION MOTION PICTURES EARN $75 to $125 a week Lea tion Picture Camera operating Wond opportunities in taking educational mercial and amusement pictures. Our course prepares you thoroughly and qu at home Free catalog America I tute of Cinematography Ine Dept Steinway Hall Bldg., Chicago, I AMERICA’S Greatest Fortunes hav made in the Moving Picture Bu Small investment needed We furnish plete theatre equipment Easy pay Openings everywhere Catalog free arch Theatre Supply Co., Dept. F, 724 Wabash Ave Chicago, Ill. MOVIE Camera, 200-foot F. 3.5 kk Tripod with panorama and tilt, mograph motor-driven projector reels of films, $3 to $5 reel Ray Avene, New York WE buy used portable suitcase ar fessional moving-picture machines H prices paid What have you for Monarch Theatre Suppl 724 & W Ave Chicag I}! MOTION-PICTURE machine and ready to run; in fine conditior Address Box 8. Sioux Falls, So ) FILMS cheap Home projectors, $ Professional projectors $250. Addr Sales, High Ridge, Mo MOVIE Cameras, $20 Drawing trating Stereopticon, $15 Catalog 302 E. 23d, New York TWO Movie Cameras, first-class cor Joseph Dorothy, 517 West 148th, New City $35.00 PROFIT nightly Small ¢ Starts you No experience needed machines are used and endorsed by ¢g ment institutions Catalog free Moving Picture Company, 482 Morton Chicago JUST Out! Send for one at once Complete Cinema Hand Book. A course in motion-picture making fr film to the projected image 0S crammed full of authoritative inforn Postpaid to any part of the world or of $3.90. Everything in Motion Pi Apparatus Cameras from $20.0 $1500.00 Write for information t Motion Picture Headquarters of World 3ass Camera Company, Dept 109 No. Dearborn St., Chicago, IIL BIG Profit Nightly—Moving Picture DP ness—small capital starts you, easily a plished Teach you—furnish eve Ralph J. Golsen, 1128 Argyle St ( Dept. M CLEARANCE Sale—500 reels hig Film Two » six reel subjects I Movie stars Special $3.50 per while they last Stock up now List Monarch Theatre Supply Co I Fourth, Memphis, Tenn BUY direct from Manufacturer N rebuilt Moving Picture Machines for | Schools, Lodges, Churches, Traveling and Theatres, Mazda—Are or Ga plete outfits—Film and Supplies D Monarch Theatre Supply Co M Tenn FILMS for Toy and _ Professiot chines All famous movie stars, > reel and up Machine bargains als for big list Free Monarch Theatre > Co., Dept P. M., 724 S. Wabash Ave cago, Ill FILMS For Sale—$2.50 per Reel dress Queen Feature Service, Birt Ala. writing photoplays No correspondence Wainwright MAKE money free to beginners Producers League, Louis. FREE to Writers—A wonderful litt of money-making hints, suggestions the A B C of successful story and play ing. Absolutely Free. Just addres A Press, Dept. 12, Auburn, New York \ SCENERY TO RENT for Opera, Plays, M Catalog. Amelia Grai SETTINGS Plush Drops. adelphia,

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POPULAR MECHANICS ADVERTISING SECTION 37 EDUCATIONAL AND INSTRUCTION MECHANICAL Drafting and Tool De- guing taught by mail Students trained latest drafting room and machine shop tice Complete outfit of instruments nished J. Harding, 76 Brighton Highland Park, Mich. PATENT Drafting. Complete instruction ik teaching this artistic, high salaried iness for 50 cts. Patent Drafting Syn- ite, Box 858, Schenectady, N. Y. THE most profitable Art as well as the easiest to learn, Sign Painting and Show card Writing. Complete course $2.50. Hall’s Sign Shop, Franklin Square, Worces- ter, Mass., Dept. A. INVENTORS—Write for our illustrated uide book and Evidence of Conception Slank. Send model or sketch and description for free opinion of its patentable nature. Highest references, Prompt attention. Rea- sonable terms. Victor J. Evans & Co., 167 Ninth, Washington, D. C. ROOKKEEPING self-taught in a week th ‘Dukes’ Columnar Bookkeeping.”’ e, $4 Newton A. Dukes, E-13 Fox street Station, New York. DOUBLE Entry Bookkeeping mastered in hours with 8 keys; guaranteed; Diplomas. rnational Bookkeeping Institute. Dept. Springfield, Mo. WORLD-ROMIC System, Masterkey to All Languages. Six Textbooks, $1.73. French Chart, 37¢; Spanish, 37c. Pronunci- ation—Tables, 70 languages, 30c each lan- guage. Languages Publishing Company, 8 West 40th Street, New York. TELEGRAPHY PENMANSHIP—improve your handwrit- *! $1 monthly. Prince, Station H, New York WHAT’S Your Future? Develop winning sonality, be popular. Higher business positions, social acquaintances, and larger arming eapacity. Success depends largely personality, no matter what business 1 are in or have studied. It’s a wonder- ful thing Free literature. Write today. Personal Service Bureau, Box 235, West Palm Beach, Fla. LEARN to design patterns for men’s ing Always in demand Lesson 1, e dollar. Start today. Cheapest course f its kind, Box 187, Baltimore, Md, ROPI’S Calculator and Short-Cut Arith- shows the answer as quickly as a watch shows the time to all problems likely ) ur in office, store, shop, bank, farm r factory Price, pocket size, paper 35 nts; cloth, 50 cents; leatherette, $1; desk cloth, $1.50 postpaid. Popular Me- ics Book Dept., 6 N. Michigan Ave., Chicago. LEARN advertisement writing. Home em- ment evenings Sell your “copy” by mail Dime brings Preliminary Lesson. . ane, 74 Cortlandt Street, New York, PROFITABLE results from practical per- il instruction in drafting. Write Box Bangor, Maine. “WHAT to Invent For Profit’ free. Pat- t News, N, Washington, D, C. HAVE a business of your own; the most fascinating, best paying business-profession the World, a foot correctionist; easy terms for training you at home in a few weeks, a Ww protected system that has enabled men and women to rise in one step to greater arnings than they ever thought possible; capital required or goods to buy, no ney or soliciting. Address, Stephenson Laboratory, 1 Back Bay, Boston, Mass. ARTIFICIAL Marble, sanitary flooring in- tructions, ornamental casting, concrete plaster, papier-mache decorations, garden furniture, statuary, Rubber-moulds, Electro- metallurgy, particulars and 200 illustrations aye * Chris Mahler, Box 122, Huntington, TELEGRAPHY—Morse and Wireless— taught at home in half usual time and at trifling cost. Omnigraph Automatic Trans- mitter will send, on Sounder or Buzzer, un- limited messages, any speed, just as expert operator would. Adopted by U. 8S. Govt. and used by leading Universities, Colleges, Tech- nical and Telegraph Schools throughout U. 8 Catalog free. Omnigraph Mfg. Co., 18 Hudson St., New York, TELEGRAPHY (both Morse and Wireless) and Railway Accounting taught quickly. hig salaries. Great opportunities. Oldest and largest school; established 46 years. All expenses low—can earn large part. Catalog = Dodge’s Institute, H St., Valparaiso, nd. WIRELESS BROADCASTED music and news re- ceived over ordinary telephone. Operation as a telephone not affected. Send 25c¢ for complete instructions and blue prints. Earl Barnes, Elec. Engr., 6207 Linden Ave., Seattle, Wash. WIRELESS telephone—complete receiving outfit. Full instructions. Best and cheapest on market. Frank Taylor Mfg. Co., Nor- wood, Ohio, RADIO OUTFITS AND SUPPLIES THE Home Radio—How to make and use it At last! A simple explanation of the making and use of a home radio outfit. Every step in construction is carefully di- rected and illustrated with numerous work- ing diagrams. Bound in cloth. Postpaid for T5c. ‘‘Broadcasting Guide,”’ 25c. Radio Educational Service, 200 Sth Ave., R-416, New York City. BUILD Radio Sets. We supply parts or complete units. Catalog 15 cents. Easily understood assembly drawings, Crystal De- tector Set, Non-regenerative Receiver, Re- generative Receiver, 2-Step Amplifier, 25 cents each. All five $1.00, No stamps ac- cepted. Hatfield Airfone Company, Dept. D, Owego, N. Y. TUDY Bacteriology—become a labora- expert Course interesting, can be istered in few months at home or in school, Good paying positions open, Degree eranted our graduates, School 13 years old. nd for Announcement. American College Racteriology, 2923 8S. Michigan Ave., Chicago, TIL ‘ SUCCEED: Home Shorthand, $2.50. Send m order. We are responsible. Byrne I hing Company, Tyler, Texas, WANTED: Information exchanged about mmercial uses for air compressors. Ad- 3 Resinesring Dept., Brunner Mfg. Co., A, AMBITIOUS writers—send today for free y America’s leading magazine for writers photoplays, stories, poems, songs; instruc- helpful. Writers Digest, 708 Butler ig., Cincinnati. WRITE articles, stories, news, in spare se for newspapers and magazines. Big Copyright book free. Press Syndicate, . St. Louis, Mo. . VOUBLE Entry Bookkeeping mastered in ’ hours with 8 keys; guaranteed; Diplomas ernational Bookkeeping Institute, Dept. Springfield, Mo. “PHOENIX Radio Apparatus.’ Within an hour after receiving your set you can tune-in on concerts, press reports, etc., over unheard of distances Write for lit- erature. Phoenix Radio & Varts Co., 119 West 4th St., Cincinnati, Ohio. CRYSTAL Set that gets radio concerts, Build it right, boys. Plans and full in- structions for building at small cost, high- grade, fine adjustable Crystal Receiving Set, fifty cents postpaid Dept. 27-R Shaw Mfg. Co., Galesburg, Kans. STORAGE batteries for automobiles and radio Buy direct from manufacturer and save money. Prices on request. Radio sup- _ DO you know anyone who is not interested in radio outfits and equipment? In days we received 393 inquiries concerning radio outfits—and every mail brings many others. These inquiries, in most cases, could be converted into actual orders, so you see what you are missing by not advertising in this column. Send us your copy and remit- tance for our July issue, forms for which close May 25th. Get the business! J. Roy McClellan, Manager Classified Advertising, Popular Mechanics Magazine, Chicago. RADIO Special: 6-volt storage battery, 40 amp., $12.00; 60 amp., $14.00. Shipped fully charged. W. & G, Tufts, Manufac- turers, 336 Newbury St., Boston, Mass WRITE for catalog showing complete line of Elmco Shielded Radio Apparatus, tuners, detectors, amplifiers, transformers and sock ets. Electric Machine Corporation, In- dianapolis, Ind. WRITE for literature on Simplex Radio- phone Cancert Receivers. . & H, Radio Company, Anthony, Kan. RADIO Manufacturing—Parts, complete units, any quantity, high-class workman- ship, prompt service; send samples or draw- ings for lowest quotations. Address Vogeley Bros., 828 Metropolitan Avenue, Brooklyn, a. . RADIO Cabinets: We build special cabi- nets and cases to order. Tell us what you want, and get our price. National Cabinet Co., Dept. R-1, Dayton, Ohio. BUILD your own Radio Receiver for $5.00 and hear the concerts nightly. Our Blue print No. 149 explains all. Price, $1.00 Experimenters’ Service, 45 Pinehurst Ave., New York, N. Y. RADIO for the Amateur—Building, In- stalling, Operating Stations for Radio Com- munication treated simply in ‘Practical Amateur Wireless Stations,” a 136-page book compiled by Editor of Wireless Age 115 illus. and diags. Size 6 x 9 in. Price, 75c ppd. Popular Mechanics Book Dept., 6 N. Michigan Ave., Chicago. RADIO Receiving Set, Easily made Construction blue print, 25 cents. Two-car garage plan, 25 cents. The Plan Co., 4413 Lillibridge, Detroit, Mich. RADIO Supplies, all kinds, We special- ize on variometers at $4.50, variocouplers, $3.75 each, immediate delivery, postpaid General Radio Supply Co., 5056 Broadway, Chicago. RADIO—Simple, complete blueprints and illustrated instructions for home manufacture and operation. Stamped addressed enve- lope and 25c coin. Cottrell, Box 259, Chicago. CRYSTAL Set that gets radio concerts Complete with instructions for installing and operating, $25.00. Shaw Mfg. Co., Galesburg, Kans. RADIO Receiving Sets and Parts, Send 0c for large catalogue with_hook-up plans Ray, 326 5th Avenue, New York. NEW Radio Books — Construction of Radiophone and Telegraph Receivers for Reginners, 75c. How to Make Commercial Type Radio Apparatus, 75c. A B C of Vacuum Tubes Used in Radio Reception, $1 Prices postpaid Popular Mechanics Book Dept., 6 N. Michigan Ave., Chicago. RADIO Apparatus and Supplies. Stand- ard makes Quick delivery Universal Radio Co., 20 East Jackson Bivd., Chicago, Ill RADIOPHONE receiving station. structions, 60c Baltimore, Md MAKE $60 weekly with Radio advertis ing. Plans, 30 cents Address today! H. Vogt, Sioux Falls, So. Dak. _ THE Best in Radio. Write for circular Howard Lindsey, Sacandaga, N. Y¥ ; “RADIOPHONE wiring diagram. Send 25 cents Dunphy, 52 Bramhall St., Port- $11.00 will construct Complete plans and in Nelson, 213 East Lafayette, plies. Dealers wanted. General Battery land, Maine Servic Ss 92 Ww i LBivd., } sel Station, 921 ashington vc TRADE SCHOOLS “RADIO for Beginner’’—gives funda- mental facts necessary for successful opera- tion of receiving outfit, presupposes no knowledge by reader. Best book on market, Send $1. Frank Taylor, Norwood, Ohio. JOIN Radiohelpers Members exchange hints; Questions-Answers, Practical Advice Bulletins. Those without sets, build one. New, simplified method free to newcomers, Membership, $2 Los Angeles, Calif. Radiohelpers, Box 263, MAKE money writing for newspapers $2,000 to $10,000 yearly; good pay for spare-time work Experience unnecessary Men and women needed everywhere; edi torial, reporting, special articles, stories, sports writing, local correspondence, et Special privileges, press pass, etc, Qualify quickly in spare time at home under veterar newspaper men. Fascinating book free Explains everything Write today News paper Training Assn., Dept. 26, New York City, XN. TF.

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BUSINESS OPPORTUNITIES ZERO Pie (ice cream in chocolate shell). Anyone can make it. Any kitchen has com- plete equipment. Secret formula and com- plete instructions sent for only $2.00. You can make profits at once. Big sales, picnics parties, soda fountains, etc. Start a paying business today. Zero Pie Co., 313 26th Ave., Milwaukee, Wis $3,000 TO $6,000 Yearly. Want it? Others are making it. Send check or money order today for our invaluable books ‘‘How to Sell Real Estate,’’ $3.00—and ‘‘How to Conduct Real Estate and Insurance Business,’’ $1.50 Absolute satisfaction guaranteed. Free cata- logs. Realty Book Co., Dept. 52, Cleve- land, Ohio. THE new concrete street and railroad tie, patent 1,399,123, patented Dec, 6, 1921, for sale—$1,000 and 5% royalty; safer than any railroad tie at the present time. Pete Jarnowski, Lombard, Il. specialty GET into the business. Amazing profits je will send you free book explaining our system. Write immediately. wonderful opportunity awaits you National Scientific Labora- tories, 624 Main, Richmond, Va. BE Independent, establish profitable safety-razor sharpening business, Small in- vestment — no experience—sure success, Agents wanted every county, demonstrate, sell machines Odell Mfg. Co., 428 Boyd, Los Angeles, Calif ATTENTION manufacturing Enormous profits—manu- facture ‘“‘Frazen Feast.’’ Ice cream in @ sealed chocolate shell, 10c bar, costs 2c. We furnish everything. Frozen Feast Co., 211 6th St., Racine, Wis. LEARN a trade. Painting signs, plates, gold letter making Our do the work Outfit absolutely free. dress Thomas Clark, 505 Line Ave., wood City, Pa. MOVIES: With the one in your locality you can operate a good paying practical business without capital or experience. Address ‘‘Goss,’’ Box 59, Canaan, N START Profitable Mail Order Business at Home. We teach you by successful teeny Particulars free. Waihamore Compan Mail Order Dept., Lafayette Bldg., Phila. delphia, Pa. ADVERTISE—25 day papers $10. +A experts. Cope Agency, name Ell- words in 20 big Sun- Sales letters built free 233, Champaign, PATENTS—If you have a patent to sell or lease, send particulars te Supply & ° a mand, 1819 Broadway, New York, N GOOD income in spare time writing news, stories, articles, letters, advertisements, photoplays; experience unnecessary; details free Dickinson, Oklahoma, Okla HOW only $10 down starts profitable Branch Mfg. Business Request details. Address P. O. Box 425, Chicago, Tl. LATEST Book on Patents. Send your idea for search of U. 8. Records. H. L. anywhere Woodward, 712 9th, Washington. EXCLUSIVE distributors for chemical compounds. Mechanical. Splendid _re- peaters, Samples $2.00 Refund made. Voleano Manufacturing Co., Los Angeles, Calif SAMPLE % pound of rubber bands 20c, with business proposition. Martin Co., Loeb Bldg., Partland, Ore. MONEY in mail-order business Names of 30 supply houses 10c. Pennell Com- pany, Covington, Ky. $1,000 STARTS you assembling motor- eycle, automobile trailers. 200% profit. Unwin, 305 Broadway, New York BECOME a Battery Manufacturer. Write for particulars to Lavender Battery Mfg. Co., Webster City, Iowa. 20,000 FORMULAS—money makers, 530 pages $1.10 “‘Ideal,”’ 5501-F North Ro- bey, Chicago. SELL Cigars; territory assigned; large commissions. Address Graham, 27 Warren, New York . o ADVERTISE. 30 words 100 magazines, $1.50 Pennell Company, Covington, Ky. “WHAT To Invent for Profit’ free. Pat- ent News-C, Washington, D. “HOW To Sell Patents’ free. Patent News-H, Washington, , & PRESSED paper novelties; fans, lamp- shades, garlands, flowers, bells and other flat folding decorations and novelties. Paper and hand-presses, for cutting and assem- bling, furnished manufacturers and home- workers. No experience necessary. We buy these goods all year and place large orders for same. Big demand throughout the United States and in other countries. Lib- eral profits and very easily handled, owing to light weight. Write for information only if you mean strictly business. Tissue Paper Novelty Works, 1685 Southern Boulevard, New York, MEN Wanted to earn $3,000 to $10,000 a year. Prepare quickly and easily through our amazing system for profitable and per- manent business reclaiming waste paper for largest manufacturers in country. Bovs do the work—you simply direct. Practically no investment necessary—a few dollars will start you Simply send name for big free opportunity book—a post card will do Write The Traub System, 303 Traub Bldg., Kansas City, Mo. $5,000 TO $10,000 a year Agents and crew managers who own Fords get into new and unlimited field. Great demand, indis- pensable Ford necessity. Endorsed by oil Stations, garages, expert mechanics, and users as only practical, satisfactory device of its kind. Quick sales, big profits, no competition. We furnish selling plan. Re- quire small investment and eight hours’ work daily. Otto Mfg. Co., 420 Sycamore St., Evansville, Ind. PATENTS—Trademarks. ing an invention, the inventor should write for my blank form “Evidence of Concep- tion.”” This should be signed, witnessed and returned to me with sketch or model, upon receipt of which I will promptly render Before disclos- opinion as to patentable nature and send booklet on Patents Highest references. Prompt attention. Reasonable terms. Clar- ence B. O’Brien, Registered Patent Lawyer, ee Floor, Southern Bidg., Washington, ». C, ENTER a new business. Earn $3,000 to $6,000 yearly in professional fees making and fitting a foot specialty, openings every- where, with all the trade you can attend to; easily learned by anyone at home in a few weeks, at small expense; no further capital required, no goods to buy, job hunting, soliciting or. agency. Address Stephenson Laboratory, 11 Back Bay, Boston, Mass. SALESMAN-PARTNER with $500.00 for % interest to open real estate office in live location. Experience not necessary, but must be a salesman, and willing to work. This proposition will earn $10,000.00 to $20,000.00 a year. References exchanged. My reference First National Bank, Chicago Give age, experience, and reference in first letter. D. E. M., 9th Floor, 78 E. Madison, Chicago. PATENTS Procured—Trade Marks Regis- tered. A comprehensive, experienced, prompt service for the protection and development of your ideas. Preliminary advice gladly furnished without charge. Booklet of in- formation and form for disclesing idea free on request. Richard B. Owen, 30 Owen Building, Washington, D. C., or 2276-K, Woolworth Bidg., New York. ATTENTION !! Go into business for your- self. Establish and operate New System real estate; business brokerage, and In- surance Agency in your community. Of- fice at home; earn $5,000 year. Representa- tives wanted everywhere; send stamp for booklet. Hayes Realty Association, Cin- cinnati, Ohio. “BUSINESS Opportunities,"” an unusual book filled with practical productive money- making plans to fit the needs of every person. $1.00 prepaid. Particulars free. Send to- day! Sell Rite Mfg. Co., 799 Military Ave., Dept. A, Detroit, Mich. PROTECT Your Rights. Write for Record of Invention which contains form to estab- lish evidence of conception of your inven- tion. Prompt personal service. Preliminary advice without charge. J. Reaney Kelly, 612 G, Columbian Bidg., Washington, D. C. CAPITAL to invest. Will buy outright or underwrite any meritorious stock, Form companies, develop your business, finance your patent. Save money. Address Sta- tistical Office, Box 617, Schenectady, N. Y. START manufacturing imitation Meer- schaum pipes. An expert can’t tell it from a genuine. Address G Seattle, Send $2 money oraer for de- tails Hielscher, 111 W. Main St., Wash. POPULAR MECHANICS ADVERTISING SECTION 668 WAYS to make money—2,716 las in ties,”” 3 volumes; Order at once. Ideal Book Shop, 5 North Robey, Chicago price, $3; yours “Encyclopedia Business Opporiu forr for 501-VF CASH business ing your own $125 to $1,000 if interested in profitable business, cond Call or write for free } cal let. yr Kaye, 149 Broadway, New y $30 A WEEK evenings: I made it small mail ofder business. Book |et stamp tells how W. Scott, Cohoes, N. Sample and plan 2% Y WANTED, local ful plan appeals to Nets you $35 weekly 622 Washington Calif. Building, Los representative; sux theater manag Theatre Bulletin ¢ Ar 2 OPEN hat and clothes cleaning par! Big profits home. Partic ulars free, Sta N. Y. Box 27, New York, B SPECIALTY-Proprietary manufact ur small capital; re-orders; unlimited large profits. The Thaxly Co., Dept Washington, D. C MAKE money with your camera formation free Send stamp. Lan 409B Wright-Callender Building, L \ geles, Calif “MONEY-MAKERS for Live Wire Free. Box 562, Fort Smith, Ark. NO money needed or have excellent sions; prefer men calling on railways, large factories. plenty of money real article. if you reputation; big « power if you are right; highly rated in Dun’s and Brad Manufacturers, 1600 Kingsland Av Louis. DOLLARS yearly in your backyard Particulars free. Metz Mushroom dope. East 89th, New York, N. Y. are resp You can We are nationally know I I ha stree € S SELL or finance your business or tion. Write Box 474, Cleveland, ir Ohio. BECOME Master Dealer—Learn Real Estate Success. Be Independent. | Profits Either Sex Special Offer |! Stephens System, 618 Wysor, Muncie, | GOOD money easily earned at hom time silvering mirrors: structive book tells how. Patterson Brooksville, Ky, no capital. Fre« & { IF you have about $1,000 and cay organizing sales force, to sell article by every merchant, which should net you Chicago. wholesaler and reta $10,000 profit year, write Sales Director, 826 Reaper | al nee I MADE $30 a week home. French making. 15 years’ experience; free tells. Ashbrook, 67, Marengo, O. bx BE Independent. We to manufacture unexcelled tions. Earn while you learn. Result anteed. Particulars Free. School metics, Box K, Omaha, Nebr. Toilet Pre teach by mz Ss 8 FREE—Formula Catalog. 8 tories, Boylston Building, Chicago. & H. La LEARN the collection business. G come. quick results. Interesting “Skillful Collecting,”’ free. Natior lectors Assn., Long St., Newark, O bookle a START a l’aying Business of Your ‘ Be a business new Tire needed. Business ambitious? $200 once. Wonderful Co., 11 Canal, MARBLE mixing instructions wood or cement flooring % inch th proof, waterproof, low cost, sanitary ors. Particulars, 200 illustrations man. Any location always will start opportunity Cincinnati, Ohio. Eat Chris Mahler, Box 122, Huntington, } LET Me Show you how to ma mouey. Absolutely new proposition a products, Materials cost $2.00 $16.00. One man sold a thousand worth in a week. and sales rights to one man in each te Write today for booklet 5, Crouch, © 309 Broadway, New York. SILVERING Mirrors! My exclusive Tartaric business. 23d Street. Booklet free H. Bars Oakland, Calif. Exclusive manufactur method opens enormously pr’ Vuleanizing and Repair St good Ar you Wr J a N. } I

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on Diant hav WY stree d N 10 r bookle val ( POPULAR MECHANICS ADVERTISING SECTION 39 MAIL Order Business is your opportunity. Rreniser’s Famous Handbooks teach how to tart small, grow big. Sell merchandise, ervice, ideas; enormous profits. Spare time to begin. Get complete set, 11 books, $3.00, and be posted. Breniser, 335 Walnut, Phila- delphia. Descriptive Catalog and big batch interesting mail order information, 25c, None free. $100,000 CORPORATION wants capable man; open office; manage sales for High Class New Device. Every Home a Prospect. Big money-making possibilities for the right man. Opening in every city. Cost $2.00, retails $5.00. $500 to $2,000 necessary to finance exclusive agency. Scott Corporation, 82 W. Washington, Desk G, Chicago. EXCEPTIONAL Opportunity for Sales Manager capable of handling state distribu- tion. Marvelous new Adding Machine, Re- tails $15. Work equals $350 machine. Tre- mendous possibilities. Unlimited profits. Write quick for details. Lightning Calcu- lator Co., Dept. B, Grand Rapids, Mich. RESPONSIBLE Corporation wants gen- eral sales managers to open branch office, nage salesmen. $500 to $5,000 necessary; expenses allowed to Baltimore if you qualify. Address Manager, 603 N. Eutaw St., Balti- more, M CLEAN Wallpaper and Window Shades this winter and spring. Big demand. large contracts. We show you how. C. swanson_& Sons, Mankato, Minn. THIS May Be Your Opportunity. A large, modern Middle Western manufactur- ing institution will consider proposals from inventors and small manufacturers, with a view of manufacturing on royalty basis or of buying outright. Small brass products preferred, but any high-grade proposition will be considered. Address P. O. Box 426 Kokomo, Ind, aes WE Start You in Business, furnishing everything; men and women, $30.00 to $100.00 weekly operating our ‘‘New System Specialty Candy Factories’’ anywhere. Op- portunity lifetime; booklet free. W, Hillyer Ragsdale, Drawer 4, East Orange, N. J. _ “SCHEMER Magazine,”” Alliance Ohio, prints big profit schemes; one subscriber making $25,000 from three; another $19,000 fiom one. Try your Juck. Year, only $1.00; three months, 25c. Atte, “eee: lantitel CHEMICAL Expert will furnish Formulas and Trade Secrets. All lines. Lists Free Ww. L. Commnings, Ph.D., 228 Gordon Ave., Syracuse, N. A ELECTRICITY Taught by experts; earn hile you Jearn at home; electrical book and proof lessons free; your success guaranteed ind position secured Chicago Engineering Works, Dept. 51A, 2144 Lawrence Ave., Chicago. CHEMISTRY CHEMICAL Analysis. Chemical and In- trial formulas. Burson Chemical Lab- oratory, 227 West 4th, Ottumwa, Iowa. CHEMICAL and bacteriological examina- s guaranteed accurate. Formulas, proc- es Write me about your chemical prob- List free. J. F. Mazur, M. B., 937 W. ' St., Lorain, Ohio. FORMULAS AND TRADE SECRETS LUMINOUS Paint. Genuine formula sent on receipt of 50c. foney making painting gas and electric light chains, hangers, push buttons, clock-dials, statues, ete. kL J. Richard, 866 Main St., Fitchburg, Mass. 550 RARE Formulas for 25¢ (coin). We can furnish any formula wanted for 50c. Allen’s Enterprises, 1227 Milwaukee Ave., Chicago, Til. ABSOLUTE Money Getters'—New catalog of novel, startling propositions free; postal will do. Fitzgerald Laboratory, Box 49-B, Stapleton, N.Y. MY Surprise Collection, six big money- making formulas, 25c (no stamps). H Rennacker, 358 Cherry, Meadville, Penna 500 SUCCESSFUL money-making formu- las and trade secrets for 50c Postpaid. Rudolph Bijergaard, Rollag, Minn. 1,600,000 FORMULAS and recipes—1016 pages, $2.00. Englewood Book Shop, 70214, South Winchester, Chicago. ABSOLUTELY any formula. Satisfaction guaranteed. Price, $1.00. Robert Tyler, 256 Park, Newton, Mass. FORMULAS worth buying. Literature free. Hager Supply, 509 2s8th Ave. So., Nashville, Tenn. 10,000 SELECTED scientific, chemical, technological and practical recipes and pro- cesses including hundreds of so-called trade secrets for every business alphabetically ar- ranged in one large volume of 800 pages. Price, $4 postpaid. Popular Mechanics Book Dept., 6 N, Michigan Ave., Chicago. FREE—Twelve Processes. Enclose 2¢ postage. Signs, 52 Levant, San Francisco, Calif. FORMULA catalog free. CC. A, Lutz, Apartment 464, York, Pennsylvania. REMARKABLE Discovery—Positively re- moves tettooes, coal marks, moles; safe, sure, simple process. Criginal since 1918, Formula $1.00. Harding Co., 142 Dearborn St.. Philadelphia, FORMULAS of the better sort, Write for our free catalog. National Scientific Labo- ratories, 624 Main, Richmond, Va. FREE—Formula Catalog. 8S. & H. Labora- tories, Boylston Building, Chicago. AGENTS WANTED AGENTS, Men or Women, full or spare time, earn $25.00 to $100.00 a week and be your own boss representing the Ho-Ro-Co 3 . Co., manufacturers of the wonderful Ho-Ro-Co Tonic, the great blood purifier and system builder; some profit-maker. Ho-Ro- Co Medicated Skin and Scalp Soap for the baby, toilet, bath, skin and scalp; a re- peater. Over 100 other fast-selling special- ties, toilet preparations, perfumes, flavoring extracts, spices, medicinal preparations and household specialties Every item a fast seller and a big profit-maker. Don’t fail to ask for our free sample case offer. We furnish advertising matter and samples free of charge. Ho-Ro-Co representatives are successful. Write today. Ho-Ro-Co Mfg. Co.. 154 Locust St., St. Louis, Mo. 0 FORMULAS, 20c. Luminous paint— Resilvering Mirrors—Renewing dry batteries Mechanics’ Soap—Gas Tonic—Carbon re- ver. Puncture Plugger, 20c each. En- re collection, 50c. Ideal Book Shop, M1FF, North Robey, Chicago 00 THINGS to Sell by Mail!’ A valu- ible up-to-date compilation of fast selling iggestions, plang and methods. Prepaid, *!.00. Walhamore Company, Lafayette Bldg., Vhiladelphia, Pa _ 1,000,000 FORMULAS. Trade Secrets. for very Business, $2.00. Ideal Book Shop, IMF, North Robey, Chicago, FORMULAS—Catalogue free. CF, North Robey, Chicago. SOMETHING New. Will cut glass any ckness, any desired shape and design. ulike a glass cutter this cuts right through like cutting paper with shears. No ichinery or chemicals needed. Very sim- » Valuable to glaziers, etc. Secret, $1.00. . J. Richards, 866 Main St., Fitchburg, iss, “Clove r, “ AN opportunity to obtain a real valu- ® money-making formula for polishing ‘tos and furniture. This is not a 25-cent dollar formula proposition, Send 75 nts for test sample. A. Drelling, 3055 limon St., Philadelphia, Pa. WHIRLWIND money-maker for agents— sample free. Sell powdered Hanslick, an absolutely new, non-competitive, and un- beatable hand cleanser. Removes grease, grime, ink, paint, etc., without slightest in- jury to skin. Its use spreads like wildfire Cheaper than all others. Sells in cans (or bulk with dispensers) to garages, autoists, mechanics, factory and office folks, to house- wives, hardware stores and to auto supply houses. Huge quantities used weekly by mer- cantile houses. (Names on request.) sig repeat business assured. Exclusive agencies, crews working for you, fast sales, splendid rofits and a permanent business for wustlers. Live ones can clean up $500 a month. Send 2c stamp for postage on Free sample, Complete sales plan goes with it. Write quick to Solar Products Company, 124 W. Lake St., Chicago, Ill. $50-$100 WEEKLY—Whirlwind _ Seller. Klean - Rite. New Washing Compound. Women crazy about it. 300% profit. Pre- miums for customers. Distributing Samples Free. Write Quick. Bestever Products Co., 1941-K6, Irving Park, Chicago. WHY work for others? Make and sell your own goods. We show you how. Enor- mous profits. Write quick for free book ex- plaining everything. National Scientific Laboratories, 624 Main, Richmond, Va. AGENTS—Send for sample ‘‘Fretnot’’— the washday wonder. Be convinced you ean do a whirlwind business, You can clear at least $20 to $100 weekly, according to Spare or whole time. You don’t have to talk; if she doesn’t buy at sight, leave sample; she will be looking for you long before you are able to make the rounds again Samples furnished free. Premiums for your customers. Exclusive territory guaranteed to agents who can produce Credits given. Don’t call. P. M. Motter & Sons, 20 E, Jackson Blvd., Chicago. WCULD $18 an hour interest you? Clarke made this selling amazing windshield cleaner; for autoists, motormen, engineers; works like magic; one rub keeps glass clear 24 hours; cleans entire windshield; works while you drive; chemical-felt sheds water like a duck’s back; snappy metal holder fits pocket; guaranteed year: sells $1; Smeet sold 2,000 few days: amazing details free Security Mfg. Co., Dept. 622, Toledo, Ohio SALES Agents. Men or women. $210 a month. Steady employment Take orders for Jennings New (Guaranteed Hosiery for men, women, children Written guarantee with each pair to wear and give satisfac tion or new hose free. Ail styles. Finest silk hose. Low priced. Write for complete line of samples. Big money for spare time. Jennings Mfg. Co., Dept. 368, Dayton, O AGENTS—Earn $50 to $100 a week sell ing Marquette Tire Tool Simple demon stration sells it. Removes tires in a jiffy Every owner wants it. Thousands in use Exclusive territory going fast. Agent's sample $1.25, retails at $2.50. Write for full -particulars or send $1.25 for sample and particulars. Marquette Mfg. Co., Dept A, 218 S. Wabasha Ave., St. Paul, Minn AGENTS—Sell articles which repeat and on which you can build up a _ permanent business. You can do it with ‘“Zanol’’ Products, a high-class line of Soaps, Per- fumes, Flavors, Coffee, Tea, Baking Pow der and other Pure Food Products and Household Necessities Write today for New Money-Making Plan American Prod ucts Co., 5886 American Bldg., Cincinnati, Ohio. DISTRICT Managers—Rig profits. Men capable of organizing and managing crews of lady solicitors, can easily clear $50.00 to $100.00 per week with the B. & G. Pro tector, the original and best protector on the market. Every woman needs and buys it Two grades. B. & G. Rubber Co Dept. 155, 618 Penn Avenue, Pittsburgh, AGENTS—We pay $9 a day taking orders for Insyde Tyres. Best and easiest seller ever put on the market Guaranteed to give double tire mileage Any tire No punctures or blowouts. Every auto owne buys on account of low price Enormou demand. Write quick for agency. American Accessories Co., B-678, Cincinnati, Ohio, TERRITORY = Salesmen—First popular price Fire Extinguisher ever made Ever home, garage and office can be sold. $90 a week can be made. No capital or ex perience necessary. You take orders, we deliver and collect—pay you daily Writ for territory. Thurston Mfg. Co., 278 Foe St., Dayton, Ohio AGENTS Wanted—Brand new article with wonderful sales possibilities Appli cants must be big enough to handle County rights on exclusive basis. Our con tract assures you a permanent and substa: tial business. Sample fifty cents Money refunded if we do not connect. Dept. 21, Bethlehem Utilities Co., Bethlehem, Pa. AGENTS, $8 a day. Take orders for Blue Ribbon Cutlery Set Stainless steel Aluminum handle Guaranteed We de- liver and collect. Pay you daily. Big de- mand Easy to take orders. No capital needed Write for sample outfit Parker Mfg. Co., 378 Awl St., Dayton, Ohio. LIBERAL Commissions for Selling Adver- tising Thermometers made by the world's largest manufacturers of thermometers. Profitable proposition for energetic men Liberal commissions Write, giving past employment and references Only a few more men needed, T. B. Div. Taylor Instru- ment Companies, Rochester, N. Y MIAMI, Florida: The World's fastest growing city. Wealth, Climate. Tuckerman & Snare.

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40 $100 REWARD will be paid to the first person who proves that the Keystone Econo- mizer fails to save 25% to 50% of any car’s ordinary gasoline consumption and entirely eliminate carbon. This is a bona fide offer. The Keystone Economizer is a real gasoline saver which has made good. Results Guaranteed. More mileage, more power, less cost. Fits any car. Easily at- tached. Saves its cost in a month. $4 post- paid, Splendid offer for factory representa- tives, agents and salesmen Write or wire for particulars to Keystone Economizer Co., Stock Exchange Bldg., Los Angeles, Calif. AGENTS, Salesmen—Get distributing con- tract for ‘Lightnin’ Gloss,’’ new refinisher for automobiles. No polishing or rubbing. Dries dustless 30 minutes. Permanent gloss. Wonderful seller. Retails $1.50. Get busy. Big profits. Makes old cars new. Address Lightnin’ Gloss Co., Wichita Falls, Texas. AGENTS—$50 a week taking orders for guaranteed hosiery for men, women and children. Must wear 12 months or re- placed free. All styles and finest line of silk hose. Write for sample outfit. Thomas Mfg. Co., Class 262, Dayton, Ohio. AGENTS—$100 Weekly New invention for all automobiles. You're backed by re- liable concern in business for over five years. Products positively guaranteed. Honesty, Quality, Service, our motto. If you're sincere, write at once. Ovee Mfg. Co., Dept. 180, Louisville, Ky. “THE Mucilage Fountain Pen’ pocket with your fountain pen. No fingers. Lasts lifetime. Never dry. office or home. Sample 50c U. 8. Agents wanted. panera terms. Box 292 Steger, Ill., 8S. A. SELL CurManCo ia Changeable Signs in One. Every storekeeper buys two and three at 200% profit to you Nothing like t. You will want nothing better to sell this year. Currier Manufacturing Company, 29 Minneapolis, Minn. PORTRAIT Agents—Earn ing our Photo Medallions. *"—Carry in sticky Handy stamps. Jax Co., big money sell- Everybody buys. You charge $3.00; make $2.40 each sale. $10 daily easy. Big variety designs. 4-day service. Perry Photo Novelty Corporation, Section 16, 360 Bowery, New York. STARTLING Agents Proposition—$100 weekly selling Rolly’s Washday Wonder, New Chemical Dirt Solvent, Harmless, Cleans without rubbing. Enormous profits. Repeat orders assured. Experience un- necessary. Territory going fast. Samples free. Rolly Chemical Co., Al, Hastings, Neb. POPULAR MECHANICS ADVERTISING SECTION WHY work for others? Make and sell your own goods. We show you how. Enor- mous profits. Write quick for free book ex- plaining everything. National Scientific Laboratories, 624 Main, Richmond, Va. TEN Dollars daily easy selling Klenzall. Washes clothes without rubbing. 300 per cent profit. Sale first order guaranteed. Free samples. Quality Products Co., Altoona, Pa. AGENTS— Buy quickest sellers at direct from manufacturer lowest wholesale prices. Big profits Unquestionably best proposi- tion ever offered. Write today, National (27), Woodhaven, N. Y. 300% PROFIT The modern washing wonder. Bigger and better. Exclusive territory. Sample and particulars free. Snap Products, Dept. X, Rochester, N. Y. PROFIT selling Lighters. Lights without matches or fric- tion. Sample 25c, Pocket Size Rapid Mfg. Co., 10 E. 14th St., New York, N. Y. AGENTS Wanted to sell the latest self- selling novelties. Territories for live ones Sample 1l0c. Dept. A, R-D-K Novelties Co., 1429 Lexington Ave., New York. $15.00 DAILY Easy selling the New Am- beroid Unbreakable Combs; kind you can hit with a hammer; write for wholesale prices. Oliver Gandy, Crisfield, Md. AGENTS—Mason sold 18 Comet Sprayers and Autowashers one Saturday. Profits $2.50 each. Particulars free. Established 30 years. Rusler Co., Johnstown, Ohio, Dept. D. AGENTS German Barber Razors. World’s best make. Money back guarantee. Dozen $14.00. Single sample $1.50. Money order. Address Berg Co., Times Building, , A Snap Laundry Crystals 300% Gas and Cigar New York, N. A BUSINESS of Your Own—Make sparkling glass name plates, numbers, checkerbeards, medallions, signs; big illus- trated book Free. E. Palmer, 511 Wooster, hio. 300% PROFIT—Every Home, Store, Office and Garage Needs. Easily carried, quickly sold. man Company, City, Mo. 200 PER Cent Profit cloth.”” Makes all metals look like new, quickly. We guarantee sales. North Texas Supply House, Weatherford, Texas. Free sample. Address Chap- 839 Dwight Bldg., Kansas selling ‘‘Shyn- BIG Money—Broken dents prevented by Fords. arms, cranking acci- Non-Kick Device for Burnett sold 144 in two weeks; made $216. Write for particulars—exclusive terri- tory. _Non-Kick Co., 717 Central, Kansas City, Mo. AGENTS—Cost $5—Your Profit $89.50 transfer monograms on autos, trunks, bags, furniture, etc. No experience, no license. Write for free samples. Co., Inc., Dept. P, TEMPERED Copper? 80° Copper Chisel. Cuts Steel. Unaffected by Heat. Big Seller. Send 25¢ for Agent's Sample and Full Par- ticulars. Wm. J. Eberle, A. M. & M. Bank Bldg., Milwaukee, Wis. AGENTS Coining Money selling Universal Gas Saver for every gas stove. Wonderful device. Cuts gas bills in half. Big profits. Write quick. B. C. Moore, Gas Saver Co., Tg a, Kansas. SOMETHING Big—Dime puts you on our Globe Monogram 244 Market St., Newark, mailing list one year. You receive latest money-making opportunities, propositions, from manufacturers and supply houses everywhere. Kentucky Agency, AGENTS and Distributors wanted to sell our Radio-Gaslighters. 25-cent sellers, $9.00 per gross. Universal demand. _ for proof. Ignition Products Company, Inc. 12 Union Square, New York. Latest styles. The Undersell stores. Covington, CAPS made to order. newest agents’ idea out. $10.00 daily easy. Armstrong Cap Factory, 210 Superior Ave., Dept. 70, Cleveland, O. YOUR Opportunity—Big money. Sell our Brushes Best quality. Lowest prices. Wonderful variety. Homes, (ffices, Hos- pitals, Apartments, Garages, Large Users. Write Springfield Brush Works, Springfield, Mass, MOST Wonderful Seller. 6c profit every dollar. No stock to carry. License unneces- sary. Sample free. Mission, 2421-MP, Smith, Detroit. CHEVROLET Anti-rattler for gear shift lever. Sells on sight. Send 25c for sample. Prottco, 972 Hoover St., Los Angeles, Calif. CALIFORNIA Rosebeads selling like hot cakes. Agents coining money; new stuff. Big profits. Catalog free. Mission, 2421- PM, Smith, it. Live men to distribute our Good commission. Per- 526 16th Ave., Mil- SHOP Agents Machinists’ Tools. dieu Tool Mfg. Co., waukee, Wis. AGENTS Wanted to sell the only anid latest real pocket pencil Sharpener. Sample mailed 25c, Fred Voogt, West Frankfort, Ii. COUNTY Distributors country for Household profit. Sizz Chemical Co., P. Indianapolis, Ind. AGENTS—Everywhere. Fifty men to sell every housewife and laundry in the United States the newest ‘Labor Saving Laundry Device.’’ Nothing like it in the world; easily demonstrated; sells on sight; Money Back Guarantee. Big Commissian and bonus. Exclusive territory. Mail $1 for sample and particulars. Barrett wanted t hroughout necessity. 00% 0. Box 1151, thousand Iron Stand Company, 1340 Broadway, New York AGENTS—Sell Real Solid, 99% pure and seamless Aluminum Ware. Put up in sets or single pieces. Big money for the hustler. Aluminum ware is a repeater and builds you a business. We have several other money-making lines for agents. Write for circulars, H. C. Aluminum Co., Fredericks- burg, O AGENTS—Don't on page 146. C. B overlook our proposition Haven Co - Particulars, $31 YOUR Clear Profit With Only 5) Selling Pure Gold af Monograms { Automobiles, Trunks, Bags—Window a; Wagon Letters. Applied Instantly. N experience necessary. No. 1 Outfit bring you $32.50—Cost only $1.50—You mak $31.00 profit. Get Colored Catalog. Fy — Ra} comes a" 36 Designs **Hurry.’’ ulife uto-Ai ‘0 tior Hartford, Conn. ——— TAILORING agents wanted to sell guara teed tailor-made suits and overcoats. \ ship fre 0 prepaid, large traveling sam outfit, 250 all-wool fabrics at $15.00 and for guaranteed suit or overcoat. Wr today for fall and winter samples. | Rose & Co., 411 8 Wells St., Chicag Dept. 500P. IMMEDIATE Commissions—no investm —no delivering—no collecting. Pay-d every day. Profits larger than usual. Tha our proposition No. 1 For the agent t) buys to resell—our proposition No. 2 w instantly appeal. 100% profit and k Goods. High grade guaranteed alum!: sacking utensil specialties and staples Our Free Goods Offer is unusually interest}, We maintain a 24-hour shipping sched Exclusive territories granted and protect: Get yours before it’s too late. Perfection Aluminum Mfg. Co., Desk A., Lemont, | AGENTS: The kitchen, not the fr porch, is where sales are made. The Mar Plan takes you right in. It secures holds the housewife’s attention; makes « call count. A _ splendid proposition itse:' but helps introduce your regular line if carry one. Novel, original, profitable. Cor plete plan and sample of fast seller y 20 cents, Stamps will de. Money-ba guarantee. Address The Martin Age 214 West 34th St., New York City, N. . AGENTS calling on motorists and garag make $100.00 weekly selling original Tin Doh. 12 years the leading repair for av tires. No heat—no tools—repairs netures permanently in 2 minutes at cost of 2 cents Send 40 cents for big $1.00 outfit, Mor refunded if not satisfied. Write at or for full particulars. Atlas Auto Sup Co., 652 W. Austin Ave., Chicago. AGENTS to demonstrate and sell to owners. Nationally advertised auto 1 that removes that dull gray film, rest: the factory lustre, and leaves a giass- har dust-proof surface. Thousands of instan prove quick sales result from demonstratio and steady growth of profits from repea business. For free testing sample and tails, address C. 8S. Manfg. Co., 502 N Whittier, St. Louis, Mo. AGENTS: Make $75.00 a week sel!)!o¢ our strictly All-Wool made-to-measure su at $26.50. You collect profits in adva and keep them. We supply finest selling « fit in America. Many exclusive mon making features. Tailoring, raincoat side-line men, part or full time, get touch with us immediately. Address Dx 101, Goodwear, Inc., 843 W. Adams & Chicago, LARGE profits selling Spee Dee. 1 marvelous hand cleaner. Washes ha without water—no grit, motorist and mechanic, buys on sight. Quick repeat orders rol! your profits Send 20¢ to cover pos on big 27 ounce can. Write for particu at once States Chemical Co., 652 Austin Ave., Chicago. acid or lye. Fy garage and fa AGENTS—To sell universal vise att: ments that have exclusive features and by plumbers, steamfitters, automobile rages and manufacturing plants. Aft big profits Fully guaranteed and easily sold. Samples, advertising mat and territory free to live agents. Add the Universal Equalizer Company, %& Pearl St., Cincinnati, O MEN and Women are now making money with our new proposition ss Everybody uses it. W selection. Continuous repeater. New selling ‘“‘leaders’’ that are in big dema Quick sales and splendid — Wr today. The Pioneer Soap Co., 35 St. | Ave., Dayton, Ohio $5 TO $15 daily guaranteed hosiery; must wear or re! free; no capital or experience requ just show samples; write orders. You in advance; we deliver and collect; « outfit furnished, all colors and grack cluding silks. Mac-O-Chee Mills © 106, Cincinnati, Ohio. high-grade line introducing new

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sell from our catalog to wearer. POPULAR MECHANICS ADVERTISING SECTION 41 RE our part time shoe agent in your cality. Pleasant work, good earnings. We send hoe book with your name on front cover 100% pro ‘exas, sold “BIG Money Makers. For particulars ect to your customers. fdr : 116 South uddress Tanners Shoe Mfg. Co., Boston, Mass. t. 15. MAKE = oe All _ business, Something New! professional Sells $5. Costs $1. _ Broonxs, 20 first day, profit $80. Big Sells quickly. Experience necessary. Write today for _ territory inted me gy outfit free. Federal As- ciation, 71-K Asylum St., Hartford, Conn, en need nN eekly repeater. Large factory offers u big profits on 150 fast sellers. Toilet ft sets, flavoring extracts, remedies, soaps ng you $8.00 to $25.00 daily. Howe of nois makes $4.00 an hour, Sample out- free to workers. Lincoln Chemical wks, Dept. 155, 2956 No. Leavitt, Chicago. _ FORD SELL Minitmend for tires and tubes— st 2c. Repair; surpasses vulcanizing, saves 0%, Every auto and accessory dealer vs. Profits amazing. Shaw made $21 st day. Hart $155 first week. Particulars { free sample. The Colonial Rubber vv., ept. 85, Philadelphia, Pa. AGENTS—Make 200% profit selling only ce for cleaning Carpet Sweeper and ~uum Cleaner ——.. e._peling a. ery housewife. exclusive sel 8 live wires. Sample, "Des- Wal iles Co., Dept. C, 189 Market St, a J Driver Agents—New, patented, hermOcone Vaporizer. Installed three min- es. Wonderful results instantly. No dis- tisfled users. Sells Five Dollars. Lasts fetime. No adjustments. Money-back cuarantee. Endorsed by leading Engineers- Motor Manufacturers. T. B. Funk Co., lianapolis, Ind. _A DISCOVERY destined to revolutionize re Industry. Only practical air-filled uncture-sealing inner tube. Fully guar- teed Autoists buy on sight. One sate ls another, $100 pital unnecessary. liana Ave., Chicago. weekly. Experience or A. Wenstone, 3025 pr P PICTURE men ask how to ot oe ints at cost, Our plan is easy. Uni rint Co., Sta. D., Chicago, Tl. ture Man Friedman’’ frames. Friedman,”” Dept. PORTRAIT Agents—$50, 000 is what “‘Pic- made canvassing. Free reular ‘‘Profits in Portraits’”’ tell hows. 24-— uur service prints, finished portraits, Samples free. “Picture Man 8, 127 N. Dearborn 8t., Chicago. £ MANUFACTURE something new with our iaranteed solid metal oe: makes article ‘ox3 costing Ic, sells 10-25c, outdoor and ndoor, like wildfire; price $7.50 with in- tructions; sample 25c. New Jersey Special- y Co, 16 Bergen Sta., Jersey City, N. J. PORTRAIT Agents—$50,000 I made can- ising. Free circular ‘‘Profits in Portraits’’ ‘plains how. 24-hour Service Prints, Por- ts, Frames. I finance you, guarantee de- very. Samples free, Write today. Fried- in’s Studio, Dept. 8, 127 N. Dearborn, ucago AGENTS—Men and Women—We start u in @ permanent business without any vestment. Whole or spare time. Big ne, easy sales everywhere. Handsome necessary Write rofits No eo w Netional Mfg. Co., B-33 West Ho- en LIVE Agents Wanted. New device, de- sned to fill a known demand. Sells for 0. Agents get $1.00 les and resales, Sells on sight tg. Co., Box 934, Hartford, Conn. AGENTS—$5 to $10 daily selling Snow ‘ust Washing Compound. Washes clothes thout rubbing. Women wild about it. & repeater. Free samples boost sales. ‘clusive territory. 300° profit. Sample Norman E. Conrad, Wabash, Ind. THE only practical auto-cover on the irket. Covers or uncovers your car in- intly. Unlimited possibilities. No compe- tion. Dealers and public garages every- here interested. State territory wanted in t letter. Beard Manufacturing Co., udinsburg, Ky PROTECT Your Rights. Write for Record Invention which contains form to estab- evidence of conception of your inven- n. Prompt personal service. Preliminary vice without charge. J. Reaney Kelly, :_G. Columbian Bldg Jashington, D. C PORTRAIT crews get our rock bottom ‘es on_finishing. Service Art Sta, D., leago, Til. commission on all M. & 8. ’ PROFITABLE side line for salesmen call- ing on banks and financial houses. Several states still open, Give ———- of lines ry Bronze now selling and itin & Embossing Co., 126 Los Angeles, Calif. Jest Third Street, EASY Money—$18 daily—Something new. “Simplex’’ Ironing Board Covers. Re- markable invention every woman buys on sight. New agent sold 100 first two days (profit $75.00). Write quick, W. J. Lynch, Springfield, TL AGENTS: Make $50 to $100 weekly sell- ing our rebuilt typewriters All standard makes $15.00 up. Guarantee five years. One month free trial. Send for agents’ en. Typewriter Exchange, Whole- sale Dept., Fordham, N. Y. AGENTS: See our display adverti t WIRE twisted sanitary Brushes-Mops, Dusters, Automobile Brushes, etc., are the leaders in specialties. Restricted territory for live wires. Steelset Brush Co., 487 Broadway, N. Y. City. VINOBAR Co., 536 Washington St., San Francisco, Calif., sole manufacturers, Ex- ceptional proposition. Food beverage, Ex- clusive territories. New invention. Dif- ferent, unusually attractive, repeater. Sam- ple, $1. Big profits. AGENTS Big profit selling our up-to- date Radio books. Write for agenis’ propo- sition. Norman W. Henley Publishing Co., 2 West 45th St.. New York SALESMEN can sell our tools to every hotel, because they pay for themselves frst time used. Address J., 1040 Georgia St., Los Angeles, Calif. on page 128 in this magazine, then write us immediately. Wide awake agents need no other line. Address, Sales Dept., The Kaxo Company, Cambridge, 39, Mass. AMBITIOUS Agents are coining money manufacturing and selling Orange Blossom Shampoo. Pleases particular customers; repeat orders assured. Materials obtainable ee Machinery unnecessary. Interest- et free. Address Norman M. Ovri, East San Diego, Calif. CHAFFIN Polishing Cloth cleans with- out ———s 25c seller 150% prott, $10 daily easy. Every housewife buys one to ween Free sample demonstrator. af- fin assy Co., 5511 Euclid Ave., . 0. WONDERFUL Fast Seller; new auto ae- vice makes tools, etc., accessible without Cleve- removing Tom: Retails $2.00. Agent's Ene $1.00. Act quick for territory. Whiting, 294 Washington St., Boston, GENTS Tinvaniaws Big money taking orders. Guaranteed Electric Hot Piae. We deliver and collect. Pay you daiuty, full or spare time. Lentz Specialty ©o., Box 3, Highland Park, Detroit, Mich. AGENTS—-Build substantial business sell- ing afticle that steadily increases and re- ue. Territory being rapidly assigned rite for particulars today. The Zeeta Company, Inc., Dept. 18, 1819 Broadway, New York City, N. Y. AGENTS: Something new. Wireless guar- anteed umbrellas. Adjust new top in min- ute. Handles collapse to fit suit-case. Other features. ay —— Free sam- ple. Ps ad Mfg. Dike St., Day- le 0. SALES Agents for exclusive county repre- sentation on Dico spark plugs. Hustlers make $60.00 and he weekly. Every car and tractor user prospect. Write quick. Dayton Ignition Co., Dayton, Ohio. ALUMINUM Brush Agents. Aladdin Pol- ish for aluminum and other metals; highly rofitable side line, 30c-$1.00 sizes for omes and public places. Sample, 4c. Address Texply Co., Somerville, N. J MEN’S shirts. Easy to sell Big de- everywheve. Make $15.00 daily Undersell stores. Complete line. Free samples to workers Chicago Shirt Co., 9 So. Clinton, Factory 205, Chicago TAILORING Agents Wanted--Make $50.00 to $100.00 and more per week, selling our wonderful all wool one price line. Suits sell for $29.50. None higher. Retail stores ask at least $50.00 for the same quality. Also strong line of featherweight fabrics to sell at $16.75 per suit. You collect your profits at once. We ship C. O. D. to customer ior balance. We furnish beautiful 6x9 swatch outfit and powerful co-operation. Hustlers write at once. Salesmanager J. B. Simpson, Inc., Dept A-112, 831 West Adams Street, Chicago, Tl. WANTED—Men to sell Lawn Mower Sharpener. Sample $2.00. Simplex Sharp- ener Co., Dept. A, 819 Goodwin Street, Peoria, DL WANTED. Representatives in every coun- ty to sell the Statyte. Every chair owner a prospect. Exclusive territory Liberal commission. Sample 50 cts, Address Foss- Fischer Mfg. Co., Coldwater, Ohio. TWO Real Money Makers. Self-threading needles. Needle books cost 5c, sell at lic. Send for samples. Atlas Needle Works, ony aoe. Madison Sq. Sta, New York, 2. SALESMEN: $100.00 and commission to sell guaranteed cord and fabric tires direct from factory at lowest prices Goodstock Tire Company, 1100 South Michigan Avenue, Chicago, IL WANTED: Experienced agent to organize crews to sell standard automobile equip- ment. Big money to right man Paul «i. Towsley, Ashton Bidg., Grand Rapids, Mich SOFT Drink Extracts, Non-aleoholic fla- vorings, Toilet Preparations, best agents’ proposition for men or women selling house- wives direct. Fletcher Production Company, 415 E 69th, Chic ago PURE 23-karat gold leaf and many other styles of entirely new window sign letters aoe Window Lettering System, 210 Dover Boston, Mass. AGENTS—We are glad you saw this ad. Wonderful seller, sample of actual size, 2% Don’t miss answering this ad. Rovin, “sol Breitmeyer Bidg.. Detroit, Mich. SOLD man-to-man $40,000 formula. Imported horse-hide razor sharpener. Show sample, sale sure. Neat case County rights. Success insured. Habanix Com- pany, Toledo. AGENTS Wanted—Salary or coramission oe demonstrating and selling our Marvel Can Opener and other specialties. Staples Mfg. Co, Box 289, Mt. Vernon, Ind TWENTY good propositions for wide- awake agents There is one to suit you Particulars free. The Lawrence Products Company, Dept. M. Beaver Dam, Wis START Little Mail Order Business any- where. Home employment evenings. Every- thing furnished. Stamp brings Instructive Booklet. E. Pier, 72 Cortlandt Street, New York, N. ¥ FISHER Safety Steering Device ‘““Makes a4 Ford Drive like a Packard.” Agents wanted every county. Good money. Fisher Sales Co., Lincoln, Nebr EARN “Flo daily silvering mirrors, plat- ing and refinishing metalware, autos, chan- deliers, bedsteads. Outfits furnished. E. vos + Laboratories, 286 Fifth Avenue, New or poy Make $1 hour, selling useful l5e article. Every housewife buys Big commission. Jerome Mfg. Co., 25 East 99th Street, New York. QUICK Seller—New auto accessory. Fits any car. Se retail. Agents’ “ee In- dispensable Products Co., 1757 N. Whipple St.. Chicago, Tl AGENTS—Just out ‘‘No-Sag’’ for screen doors Big a" aoe. by Anderson & Co., attachment sample 25«c. North Easton, ass. WORLD'S Fastest Selling Auto Acces sory! County Distributors wanted; write to- day. G. L. W. Spring Oiler Co., San Diego, Calif AGENTS: Lowest-Priced one. Leaf Win- dow Letters Free Samples erty Letter Co., 77 Chapel St., Conn. Address Lib- New Haven, [NTS sell used clothing: make $10.00 to 25.00 day easily New wholesale method. Crosby Co 609 Division, Chi- cago : “BLADEKNIFE” knife from any twenty cents. son, J AGENTS, sell new Fords. Big seller. For Burnham-Cote Co, Holyoke 17¢ PROFIT on 25¢ sale. sellers. ABC “ya Co., Washington, c THE Agent’s Guide—Tells where to buy almost everything. Copy 10c. Wilson Pub- lishing Co., 1400 Broadway New York SHEEP wool polishers, cleaners, 100% profit. Home, commercial, auto us¢ Bennington Duster Co., East | Boston, Mass $30.75 PROFIT on $2.50 outfit; gold ini tials for automobiles, etc Ww rite Natidnal, Station D, Brooklyn, N, ¥ means genuine discarded blade Address, L. L. Martin, pocket Sample Pater- pedal for literature, write »__ Mass . Two new fast Box 1715B, Neutral dusters,

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42 AGENTS Wanted—Big artificial flowers Lotos 1734 N. Halsted St., money in selling Manufacturing Co., Chicago.

SELL Ladies’ Art Embroidery Needle Sample 50 cents Eugene Marquis, 5200 North Keystone, Indianapolis, Ind BIG Profits. Fast sales. Every house- wife buys. Polishing cloths. Pease Supply Company, Keene, N. H. AGENTS, $100 weekly with latest inven- tion. Raymonds Manufacturing Co., 31 Fast 132nd St., New York AGENTS—Don't overlook our proposition on page 146. C. B, Haven Co,

GOOD prices paid for butterflies, insects See Sinclair’s Display Advertisement, page 9 27.

AGENTS—Don't overlook our proposition on page 146, C. B. Haven Ca.

WHY work for others? Make your own goods. We show you how mous profits. Write quick for free book ex- plaining everything National Scientific Laboratories, 624 Main, Richmond, Va. NEW Garter, Patent Pending. Free sam- ple. Art Co., 513 North Dearborn, Chicago, “HOW to Sell Patents” Patent News-O, Washington, D. C. MANUFACTURERS Agents—District Managers—Crew Managers—Get immediate- and sell Enor-

free.

ly our proposition, Mother Goose Wringer Mop-—-New, Patented, Perfect. Saves the back—Housewife stands erect to do all scrubbing—Hands never touch the water. Retail $1.50. More than 100° profit. Sample prepaid $1.00, We had to double size of factory last year to handle the orders, You can make a small fortune. The Alline Com- pany, 6523 Euclid Avenue, Cleveland, Ohio.

AGENTS—Enormous profits selling Genu- ine Gold Leaf sign letters, Guaranteed not to fade. Establish a permanent business or

travel. Anybody can do it. Free samples. Guarantee Sign Service, A 430 South Cali- fornia Ave., Chicago. AGENTS—Easy, quick sales. $60 to $100 weekly. Valuable free premium to _ every customer. You write orders. We deliver and collect. Commissions daily. No capital or experience, Wonderful new solid alumi- num handle, big cutlery set, sells itself. Best year-round proposition. ample — free. Also free Ford car offer New Era Mfg. Co., 803 Madison St., Dept 21, Chi- cago, EVERPLAY Phonograph Needle plays 27,000 times, Better tone Preserves records. Fits all phonographs like ordinary needle. Not a jewel. Point renewed as used from 9 inches of soft special alloy wire coiled within the needle. Saves $40. Retails $1.00. No dealers to buck Big profits, Fverplay, 1 McKay Bldg., San Francisco, Calif. AGENTS: We want Guaranteed Batteries ing and Lighting; quality and price. and reproduction.

agents to sell < our for Automobile Start- our Batteries are right in (Ford size sells for $16.00.) We will furnish you instructions for installing, and pay you a good commis- sion. Box 96, Defiance, Ohio. MOTOR Ignition Amplifier—A Wonder Invention! Gives new power to an old motor and more power to the new. Sell to garages,

accessory dealers and users. Quick action, big money and _ satisfaction. Write for prices and literature. Motor Ignition Cor- poration, Mfgrs., Albany, N, Y.

BIG Profits Selling New $3.50 Automatic

Adding Machine. Absolutely accurate. Fully guaranteed. Quick sales. en daily easy. No competition. Pocket size. Bus- iness people everywhere positive customers. Thousands being sold Tremendous de- mand. Here’s high-grade money-maker. Bassett Co., 1458-D, Hollywood Ave., Chi- cago. HIGH-GRADE agents for entirely new accessory for any automobile. Makes night driving safe Can carry in pocket; every ear owner buys. Fits any make. Men who can stand big profits and stay on job. Ray Auto Filter Company, Marion, Ind AGENTS coining money with our wom- en's household aprons goods; and other rubberized children’s aprons, pinafores and sun- bonnets, utility bags, etc. Best goods made at least prices. Write for catalog 11 The 466 Broome St., New Schafuss Corporation, York, N. Y

SALES Representative wanted every coun- ty to give all or spare time. Position worth $1,200 to $3,000 yearly. No previous expe- rience or capital necessary Write for full particulars A. A. Silver-Chamberlin Co., Clayton, N. J. SELL Mengo Stictite and tubes. Every Auto buys Appoint Sub-Agents. Exclusive territory. Sales Plan and Free Sample. Mengo Products Co., 533 Rosedale, Pitts- burgh, Pa. SIGNS for stores and offices. new. $50 week easily m ide. System, F150 W. Austin Ave., WANTED— Agents and Salesmen to handle Europe’s Famous Wonder Glass, the newly imported Prism ‘‘Binoculette.’’ For theatre, hunting, yachting, races, touring, aviation, ete. This is the smallest and of its size the most powerful Glass in the world. Can be carried in vest pocket or ladies’ bag. Retails at $25.00. Confidential wholesale price to agents $12.50. Send money with order to George Mayerle Optical Co., Gen- eral Importers, established 1894, 960 Mar- ket St., San Francisco, Calif. (Send for catalog.) 3 IN 1 Bags,

Patches for tires Owner and Dealer

Entirely Chicago Sign Chicago.

$5 per dozen. Sells for $1.25 each. Send 50c for sample, Write for pa of 100 sure sellers. Economy Sales Co. Dept. X, Boston, Mass. CABBAGE Cutter, 5 vegetables, like aluminum, dulls, 20,000 users Cincinnati alone, en- dorsed by Good Housekeeping Institute. Sample 48c. Meyer Co., Orland Ave., Cin- cinnati, Chio. AGENTS—Sell Our Marvel Make $4 on every $2 invested your opportunity. Write us now. Vernon, Ind, Mfg. Co., Mt SELLS like hot cakes; big profits; new ironing wax; perfumes clothes with lasting violet perfume. Working outfit 10c. Yankee Manufacturers, 380 Atlantic Ave., Brook- lyn, N. Y. LATEST, niftiest, simplest folding auto- mobile and camping stool ever devised. Sells also like wildfire at parades, public gather- etc. 100° profit. Mincke, Alhambra,

knives, slices 20 don't rust, never

Can Opener. Our tip— Staples

ings, Calif. AGENTS Make $1.50 on every shirt order from manufacturer direct to wearer. Menzin Shirt | Co 3863 srd_ Ave. .. New York City.

$10. DAIL Y Ea y with my specialty. 500% profit K. Home, 1957 Warren, Chicago. “GLARESCOPE’’—New auto accessory, just out, nothing else like it on the market: $15.00 to $20.00 daily easy; retails at $2.00

Write for exclusive proposition. American Reflector Co., Hammond, Ind AGENTS—Unusual opportunity. Hand some profit to live agents Every attoist convinced by demonstration. Write today for attractive proposition. Address Blasdel Products Co 4319 McPherson Ave., St. Louis, Mo. EXTRACT Men:

Sell Vanilla, Lemon and Orange in bulk at one-half price. Wonder ful goods. Profit 200%. Address Trask, Manufacturer, Temple, Maine.

$25.00 REWARD paid for any Corn Great Christopher Positive Corn Cure cannot re- move. Also good for Warts, Bunions, Moles and Callouses. Price 35c. Particulars free. -y sar Specialty Corporation, Buffalo,

AGENTS make $50.00 Yankee Wringer Mop; sample free. Co., 2248 North Ave.,’ Chic ago. AGENTS Men and women, in spare or full time, make big money selling household necessity. Every home a prospect. Quick sales, big profit. Territory open, Write for particulars. Judd & Leland Manufac- caries Company, Box 21, Clifton Springs, weekly selling Scheff

AGENTS—Sell Patented and Cigar-Case Moisteners, Start making money at once. culars, cuts and sales plan. Co,, Dept. M., Milwaukee, Wis MEN or Women—Enormous Profits ing Duo Guaranteed Products. Easy at every house, All or spare time, repeaters Write Quick, Duo Co., Y-1, Attica, N. Y. oa SELL Pudding Powders—Delicious des- sert. Fast sellers; quick repeaters; big profit. Send for terms and sample. C, H. Stuart 75 Broadway, Newark, New_York. Co., 75 yar AGENTS—Sell Electric Body ly Batteries for Nervous Diseases and Rheumatism. Indianapolis, Ind Nealeigh & Co., Lighters Big Profits Write for cir- Drake Mfg Cigar

sell Sales tig Dept.

‘liams

POPULAR MECHANICS ADVERTISING SECTION EVERYBODY Double Strength necessities Big repeaters. Duo Co., Dept. F-1, uses Extracts. Extracts, Complete Write Attica, N. Y

AT Last—World’s Ureatest chine Almost human. Retails $15 equals $300 machine. made, demonstrating garages, factories tracts, multiplies, Speedy, accurate, Five year guarantee. amazing profits tected territory. Write quick. Calculator Corp., Dept. F, Grand Rapids, Mich. to _ stores, Simple, easy; divides, durable, adds, Liberal trial

AGENTS Sell Stain Remover. Huge Sample. Write today Inc., Newark, N. Y., profits. Dep

Adding Ma ; wort $500 monthly easi office sub automatically handsome Tremendous demand offer. Pr Lightning Smith Bldg AGENTS—Advertising Pencils, ready se|! ers, tion So. excellent sideline, North American Pencil Works, Canal St., Chicago. Write for proposi

Sell Duo line today Neverfail Iron Bust and Big lin Sinford Beal Co t. 6. 310

AGENTS—$60-$200 ples. store windows Liberal offer agents. Metallic Letter Co., 431-C N. St., Chicago. a week.

GALLAGHER made Selling guaarnteed Collection by all business men. Sheffield Ave., Chicago, Systems, 1 Sayers Mfg., Ii.

BIG profits. flectors, Rear View loot Serapers and accessories. Car buy one to gross. Write trated catalog and agency prices. Sales Corporation, 11-D Grand Michigan Mirrors, owners, Dealers Sell Plate Glass Wind D j Aluminu: 20 nationally advertis Garagt quick for ill Ray Rapid

POLISHING Cloth — great profit Get our proposition. Newton Co., 19 Main St., Newark, N. Y. seller — t Free San Gold Sign letters anyone can put « to general Clark $336.00 in one wee! is i i &

FREE Sample ‘‘Rain Shield Wiper.’’ tails $1.00 it) Every Autoist Cloth. No Paste. No ment (1) Rub keeps Windshields 48 Hours against Rain, Snow Storms. vention Just Out. Prevents Accidents makes $12 Hour.) necessary. Wonderful Pocket Write Quick for Your Free Life (B) Corporation, Hartford, Buys Quickly. Sidel "Sonn. R Costs You 25 Cents (300% Pr (Ww Experience | Mechanical Attac! clea Sample. Nu

100% PROFIT selling our felt rug homes, hotels, offices, ete Everbody We are manufacturers, not jobbers. Pr defy competition $75 week easy. Felt Rug Comptes. 56-C Newark, N. J.

SOFT Drinks In Powder add cold water and sugar; no trouble. F for the home, picnics, parties, dances, et Many make $10 to $50 day. Ten-glas package, best drink you ever tasted, a particulars 10c postpaid pany, 4403-11 Madison St. ~ AGEN Eg NTS: 1922's 8 Greate st Sensation piece toilet article set selling like blazes $1.75 with $1.00 dressmaker’s to each customer 922 E. M cago. PLYMOUTH Bags popular bag in green, brown leatherette, cretonne $7.20 and $10 per dozen paid Write i. Condon, Mass. LIVE Agents make $10 Day sell Eureka Strainer and Splash Preventor every water faucet. Takes on sighi advertised and known, Get details A. B. Seed Filter Company, New York. , Chicago.

Davis Co., Dept. 506,

We black, lined. blue $6-$6 Mfg., 12 Pearl St.,

11 ing bu Newa Bergen Street ; ten kinds. Ju Morrissey Cor shears fr Line up with Davis f Chi are gelling th and Sample 65¢ pre for free samples of materia Sostor f Wide today 73 Frankilir MAKE 600% Profit, Free Samples, Low: priced Gold window letters for stores, fices. Anybody can do it. Large dema Exclusive territory. Big future. Side Acme Letter Co., 2800-D, cago. SELFOLITE—Agents, Streetmen—Self lights any fire while user sleeps, or any ti! Performs surprising stunts. Newly paten'

Sample 25c, postpaid; money back. Par ulars. Kaytwo Mfg. Co., C195 Station Boston, Mass. AGENTS: Big Profits Genuine G Leaf Window Letters anyone can put Seripts and 57 varieties Chicago A Co., $42 Altgeld St., Chicago Congress, ! ‘ it 1

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Duo line day Ma work sil Tices, sub pally some land ; Pro thing sldg.. and line Co., sell posi , 310 Sam ut or neral Clark week used 2815 1 De- pinum rtised arages illus Rapid apids — big ons & * Ri Prof No ttach - clea > ! (wil > Ur Jelin: Nu in, igs to buys Street :. Just Fine $s, et toston, selling or for Widely today anklin Lowest ps, of- mand deline. Chi elfolite y time itented Parti ion A » Cx mut Ul POPULAR MECHANICS ADVERTISING SECTION : 43 $1,000 PER man per county. Get yours Inexperienced men pulling down star —. men’s profits. Write for proof: How ~~" ers, ministers, clerks—men in all walks of life—made big money in whole or spare time. You can do it. Amazing proposi- tion—wanted everywhere Exclusive _terri- tory—no sales limit. A hot or cold run- ning water bath equipment for any home at only $7.50. Self-heating. No plumbing nor water works required. Investigate. Terms. Send no money. Write letter or postal to- day. Allen Mfg. Co., 654 Allen Bidg., To- ledo, Ohio. PORTRAIT Agentse—A new portrait, something entirely different. Write for par- ticulars, also catalogue and price Fidelity Portrait Company, Dept. 100, 3047 Harrison St., Chicago, Il. WHY work for others? Make and sell your own goods. We show you how. Enor- mous profits. Write quick for free book explaining everything. National Scientific Laboratories, 624 Main, Richmond, Va. AGENTS—Big Profits, Gold Sign letters easily applied, samples free. Liberal offer to General Agents Dept. C. Interstate Sign, 2620 No. Halsted St., Chicago. EARN Big Money Fast applying Litho- gram Initials to automobile doors. Every owner buys. $1.35 Profit on each sale. Full particulars mailed. Address, Lithogram Company, 17-S East Orange, N. J. ay Transfer Flags, Novelty Si Fatales Free. Write Hinton Co., Star ty, n PORTRAIT Agents, who want good work prompt service and who desire to pur- chase their frames at factory prices, should write us at once for catalog and price list. W. G. Hannan Co., Dept. A-5, 57 E. 18th St., Chicago, Ml. AGENTS—New patented curtain rod, ne- cessity in every home; big profit; 4 to 10 sales at every house. Write for free sample. Home Curtain Rod Co., Providence, R. I. LARGE shirt manufacturer wants Agents to sell complete line of shirts direct to wearer. Exclusive patterns. Big values Free samples. Madison Mills, 503 Broad- way, New York. AGENTS—Clever Invention! Inkspoon makes every pen a fountain pen. Fast office = ny big profit, demand increasing every- ~y xclusive territary offered. Sample . —? Company, Tribune Bldg, New York, AGENTS: Big Money Monogramming By Transfer Method. Catalogue Showing Over 50 Styles and Particulars Free. Motorists’ Accessories Co.. Mansfield, Ohio. YOU can make $12,000 a year seiling well-known, standard, advertised make hand-drawn chemical fire engines, motor fire apparatus, extinguishers, hose, and com- plete line of fire-fighting sundries. We have several openings in good territories. Other men are making $1,000 a month in territories not so good as we now offer. Address Ajax Fire Engine Works, Bush Terminal Bidg., 10, Brooklyn, N. Y. AGENTS Make $10 a day selling Presur- own Trouser presser and creaser. Connolly, 55 Vesey St.. New York. AGENTS wanted to sell ‘“Havana Treat’ Se cigars to Smokers and Stores, Havana Treat Cigar Co., Utiea, N. ¥ $200 WEEKLY. Free samples. Sell gold sign letters to stores, offices. No experience. Big future guaranteed. Can travel. Ex- clusive territory. Become our general agent. Acme Letter Co., 2800D Congress, Chicago. MAKE $25 to $50 Week representing Clows’ Famous Philadelphia Hosiery, direct from mill—for men, women, children. Every pair guaranteed. Prices that win. ‘= he “How to Start’’ tells the story Clows Company, Desk 31, Philedsipbic “ro PP cae | = letter -_—— Boma, ——_ c., without xX ous experience Transfer "Make $27.50 on $2.50 Out fit. Auto M am Supply Co., 16 Green St., Newark. N. GOOD income, spare time, refinishing chandeliers, brass automobiles, etc., by new method; producing amazing results; every household possible customer; experi- enee unnecessary; simple plan of manufac- turing at home starts you in big money- making business. Write for free samples, ~~ 4 finishes, ete. Gunmeta] Finish Co., Ave. , Decatur, IL GOLD Leaf Sign Letters; make and sell; profits exceed 1,000%; aapeiee demand ; Sartioulens free. Johnston Co., Quincy, m AGENTS—Texe Remedies 200%. Address Int'l. Remedy Co., 1331 Franklin, St. Louis, Mo, EASY, Sie work for Mechanics, Shop Men, s, during spare hours; will add many ,- 3 to their salaries. Also want persons who can give full time. Big — assured. Novelty Cutlery Co., 67 Bar ” Canton, . IF you need good live agents—fellows who an get the business—ask me how others are doing it. I'll gladly render the necessary assistance, J. y McClellan, Mgr. Cilas- ified Advertising, Popular Mechanics Maga- zine, Chicago. FREE—Formula Catalog. 8. & H. Labora- tories, Boylston Building, Chicago. BEST Proposition on Earth. Kitchen ialty Every Woman \ Sa | 1 it in existence. “— Et Best Novelty Mfg. Co., Dept. C, 160 N. Wells, Chicago. WE Start You Without a Dollar. Soaps, Extracts, Perfumes, Toilet Goods. Experi- ence unnecessary. Carnation Co., 201 Olive, St. Leuis. AGENTS and portrait men. Crew man- agers. We give you more for your money. Better and quicker service. est prices on frames and glass. Rejects credited. Catalog free. The Pioneer Corporation, 1259-A West 63rd St.. Chicago AGENTS—Stamping names on Pocket Key Protectors; sample Check with your name and address, 25c. Stamping Outfits, Em- blem Checks, Check Fobs. Name Plates Hart Mfg. a Desk 2, 303 Degraw St., YOU can be your own boss with our Key Check outfit. Good for $5 a day stamping names on pocket key checks, fobs, etc. Sam- ple check with your name and address, 20 —e,. _ Die Works, Dept. M, Winches- ter, N. AGENTS make 140% profit. Iradium (luminous) crucifix shines in the dark. Sells for $2.00. Costs 84c. Complete line religious articles, crucifixes, bulbs, switch plates, house numbers and match boxes. Novel! Crnamental! Useful! Every home a prospect. Big sales. Get free demonstrati outfit. The Pioneer Corporation, 1259 63d St.. Chicago, IN. AMERICO Booster auxiliary water car- buretor makes autos burn water. Eliminates carbon. Low cost; liberal profits; details oo. Americo Co., Dept. 178, Cincinnati, 0. ANY man handy with paint brush can Start new mechanical business on nearly nothing; needed everywhere; nearly all profit; experience not required. ‘John Braceland, 1457 So. Ninth, Philadelphia, Pa. SELL Necessities. Everybody needs and buys the “‘Business Guide.’’ Bryant cleared $800.00 in July. Send for sample. It’s free. Nichols Co., Box 4-B, Naperville, Ml. PATENTS—Write for our free illustrated guide book and Evidence of Conception Blank. Send sketch or model for our opin- ion of its patentable nature free. Highest references. Prompt attention. Reasonable terms. Victor J. Evans & Co., 163 Ninth, Washington, D. C. PORTRAIT Agents: Our goods will make you big profits. Delivery guaranteed. Re- jects credited. Prompt shipments. Send for latest catalog and prices. Adam J. Kroll & Co., 602 Blue Island Ave., Chicago, Ill. DICHINOLINDIMETHYLSULPHATE It’s a Chemical. Millers The Chemist supplies Latest Manufacturers’ Formulas for Food Reverage, Household, Automobile, Summer Specialties in all lines. Grape-ola New_Bev- erage with the Kick. Stamp brings Lists, Valuable Information to start a business aying Fifty to Five Hundred Dollars week- y with small ~eeeeee Miller. Chemist. Tampa, Florid WANTED—Tailering Sales Agent—Make big money from very start—$60.00 to $75.00 weekly. Largest made-to-measure tailoring house, furnishing an equipment of five hun- dred woolens, wants you to take orders. Sat- isfaction guaranteed. Biggest merchants in many towns have started with our line. If you want to establish yourself perm In business and make big money write for full particulars, giving your experience as salesman or tailor’s sales agent. H. F. Foster, Sales Manager, Lock Box 483, Chi- cago. AGENTS—Best seller: Jem Rubber Repair for tires and tubes; supersedes vulcanization at saving of over 800%; put it an cold, vul- canizes itself in two minutes, and is guar- anteed to last the life of the tire or tube. Sells to every auto owner and accessory dealer. For particulars how to make big money and free sample, .address Amazon Rubber Co., Amazon Bidg., Philadelphia, Pa., Dept. 505. AGENTS—If you are making less than $300 a month our proposition on Sentinel Burglar Alarms for windows and doors will interest you. Many agents earn $20 daily. Brand new inventions. No wires, batteries or nails. Instantly attached to any door or window. Handsoemely nickel plated. Sell on sight. No competition. Provides cheap burglar insurance. Big money makers. Write today for extremely liberal terms to agents. Sentinel Alarm Co., 140 8S. Dearborn St., Chicago, Il. AGENTS: Big profits. Best and cheapest window letters made. Easily applied. Dime brings five samples. Particulars free. Stai- brite Co., 1115 Second Ave., New York. MAKE §$2 an Hour. Article that removes iron rust, grass, medicine, fruit, mildew stains. Cleans Panama and Straw Hats. Bleaches clothes. Sells Every home. Write for free demonstrating outfit and start tak- ing orders at once. Christy, 81A Union, New- ark, N. Y. AGENTS: Big Returns, fast office sellers; particulars and samples free. One Dip Pen Co., 2 Daily Record, Baltimore, Md. AGENTS make a dollar an hour. Sell Mendets, a patent patch for instantly mend- ing leaks in all utensils. Sample age free. —— Mfg. Co., Dept. 404-B, Am- sterdam, N. Y. BIG money and Fast Saies. Every owner buys Gold Initials for his auto. You charge $1.50; make $1.35. Ten orders a day easy. Write for particulars and free samples. American Monogram Co., Dept. 40, East Or- ange, N. J. OUR Ex-Cel Luminous Crucifix shines brilliantly in the dark. Churches, hos- pitals and individuals are only waiting for a demonstration before buying Agents make handsome profits W. G. Hannan Co., Dept. B, 57 E. 18th St., Chicago. HIGH-GRADE SALESMEN WANTED SALESMEN can earn $5.00 a day selling our line of Calendars Fans, Pencils, Whistles, Yard Sticks, Blotters, Fly Swat- ters, Signs and other Novelties Liberal commission Sells entire year Fine side lines. Local and traveling agencies. Live capable men can build up a big local trade or a big business in a wide territory One of the finest lines on the road Only one case to carry High-grade salesmen can make $5,000 a year Address Model Calen- dar Co., Dept. 226, South Bend, Ind. ONLY one policy a day means $130 per month profit; same on renewals. Policy pays 5.000 death: $25 weekly benefit for injury or sickness. Premium $10 yearly. Full or spare time Easy seller Write quick for territory. Underwriters, Dept. K-30, Newark, N. J HAVING sold 150,000 of a household ap- pliance in New England we now offer direct salesmen and district managers in other territory equal opportunity to earn from $2,500 to $5,000 yearly The Reeves Com- pany, 65 Broad Street, Milford, Conn. TO a Few Salesmen—real producers—e live manufacturer offers a proposition of ex- ceptional merit. Plenty of opportunity to develop and advance. Get your applica- tion in at onee. Auburn Brush Co., 315, Lynn, Mass.

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44 POPULAR MECHANICS ADVERTISING SECTION MAKE big money selling new, self- adjusting Robert Wrench Most wonderful tool on market. Sells for $1.85. You make almost 100% on each No free samples Robert Wrench Co., 71-C Murray St., New York. SALESMEN—Sell Zim’s Peerless Collec- tion System (108 letters). Professional and business men need it. Has special, exclusive features, Sell $7.50. Costs you $2.00 Creditors’ Association, Minneapolis, Minn. SIX Live Patented auto auge, windshield cleaners, © investment. Big commissions Sales Mgr., 42, Sta. C, Omaha, CALIFORNIA Rosebeads cakes. Agents coining money. Absolutely new. Big profits. Catalog free. Mission, 2421-SP, Smith, Detroit. SALESMEN sell ‘‘Ratskyll,”” our non- isonous Rat and Mouse Exterminator. Vonderful new discovery. Ready for use, no mixing, no bait required. Harmless to man, poultry, cat, dog and other animals. Rodents die outside premises. No odor. Call on hotels, restaurants, bakeries, gro- ceries, department stores, mills, etc. Good salary and commission. Empire Special- ag Co., 1549 N. Wells, Dept. 301, Chicago, I 312 McKnight Bldg., accessories: Oil hose clamp, etc. Address Nebr. selling like hot SALES district managers wanted for Dominant Polish, the new wonder that is being adopted everywhere. If you have small capital we can make you a remarkable of- fer, one that will put dollars in your kets while you are making cents now. exclusive territory granted Dominant eee Co., 163 South St., New York City, :. Y. SALESMEN—$200 to $500 monthly easily earned demonstrating wonderful Two-pound Desk Adding Machine. Sells for only $15. Equals work of costly machines, speedy, ac- curate, fully guaranteed, big demand, stores, offices, garages; enormous profits. Exper- ience unnecessary, it sells itself. Write quick for trial offer. Address, Panghorn Adding Machine Co., Desk 600, Grand Rapids, Mich. SALESMEN to sell new invention of popular-priced combination fire and burglar alarm; can be handled as side line by cigar, hardware, drug, candy salesmen aod others; big profits, wonderful opportunity for good workers, territories limited, nationally advertised. Send 25c for sample and par- ticulars at once. Frank’s Products, 702 Broadway, New York City. MAKE $50 Daily. Something New. Profit. All business, professional men need it. Sells $5. Costs $1. Brooks, Texas, sold 20 first day, profit $80. Big weekly re- peater. Sells quickly. Experience unneces- Write today for territory wanted. outfit free. Federal Association, 71-D Asylum St., Hartford, Conn. EASY to sell Groceries, Paints, Automo- bile Oils, Roofing, Stock Food to consumers from samples, no capital or experience necessary; steady, profitable work. Commis- sions advanced. Satisfaction guaranteed. 50 400% Sample ears in business. Write for full particu- ars. Loverin & Browne Co., Wholesale Grocers, 1775 S. State Street, Chicago, Ill. A FIRST-CLASS Side-line Salesman can obtain a most desirable arrangement We are established manufacturers” selling a specialty to banks. Samples light and com- pact. Address, Continental Banking-S up- ply Co., Mexico, Mo. SALESMEN—Find out about ‘‘Smack,”’ the new soft drink flavor. There's nothing else like it. Exclusive ter- ritory. Big profits. Write today. Pitkin & os 399 Commercial Bidg., Newark, New fork. No competition SALESMEN—If you want year, write me. Strong line Nationally advertised, vance to producers V. Morgan, Mer. 1920 Euclid, Cleveland, Ohio, Dept. 200. CREW Managers, Distributors: Fast- selling $4.69 household necessity. No capi- tal required. Protected territory. We de- liver and _ collect. Attractive sales plan. Address, Eastern Keenware Co., Franklin- ville, N. Y. SELL patented necktie holder. 25 five for one dollar. Gross: six Standard Metal Stamping Works, tre, New York SOMETHING New, a Necessity. $6,000 this for retail stores. Liberal weekly ad- cents; dollars. 224 Cen- All bus- iness and professional men need it. Sells $7.50, costs you $1.40. Big repeater, Sample free. Merchants Ass‘n., Minne- apolis, Minn. LET’S Go! We produce, you sell ‘‘Lyns- Lens’’ shade everywhere electric lights are used, Unusual moneymaker. Write, Lynds, Wilburton, Okla. SALESMEN, Sell B. & C. Pedal tor Fords Write for particulars. Burnham- Cote Co., Holyoke, Mass. MAKE $50 to $100 per > week selling di- rect to wearer our $20, $24, $28 line of Virgin wool made-to-measure Suits and Top Coats. You get your profit the minute sale is closed experience not necessary. We teach you how and furnish everything to do business with; no extra charges for dou- ble breasted or fancy coats, extra sizes or skeleton linings. House of Campbell, Camp- ay Building, 456 South State St., Chicago, SALESMEN: Sell State pocket maps, showing auto roads, to advertisers and dealers, Easy to sell. Get our splendid offer. Standard Map Company, 127 W. Ohio St., Chicago. BEST Seller: Jem Rubber Repair for tires and tnbes; supersedes vulcanization at sav- ing of over 800%; put it on cold, vulcanizes itself in two minutes, guaranteed to last life of tire or tube; sells to every auto owner and accessory dealer. Get particulars how to make big money and free sample. Amazon Rubber Co., Philadelphia, Pa., Dept. 510. ASKO—Salesmen to sell Auto Acc. as side line; can carry sample in vest pocket; sells on sight. Big comm. Write for sam- ple. Allen Specialty Co., 2721 West Lake St., Chicago. “OUTOSITE,”’ aluminum hip suspenders, 50c. Shirt down, pants up. Enormous seller. Woods, 501 North Seventh, St. Louis. SELL Advertising Pencils. Big Commis- sions. Quick Sellers. Write for Propo- —. Keystone Pencil Works, Altoona, a. 57 MILES per gallon made with new pat- ented gasoline Vaporizer. Write for par- ticulars. Vaporizer Co., Pukwana, S. Dak. EVERYRODY Eats Every Day. You can handle Sugar, Flour, Canned Goods, Dried Fruit, Coffee, and entire line of groceries, as well as Paints, Roofing, Aluminum Ware and Automobile Oils, with no rent to pay; no money invested; take large orders from samples. Goods are guaranteed and proven quality. Selling experience not necessary. Steady, profitable work for “‘workers.’” Address Hitchcock-Hill Co., Dept. 200, Chicago, Ill. Reference: Any Bank or Express Co. $300 PER month and bonus guaranteed salesmen successfully demonstrating wonder- ful new adding machine. Retails $15.00. Work equals $350 machine. Genuine oppor- tunity. Full time or side-line. Lightning w apeaaad Co., Dept. G, Grand Rapids, ch. AGENTS—$60-$200 a week. Free samples, Gold sign letters anyone can put on store windows. Liberal offer to general “a Metallic Letter Co., 431-E N. Clark Chicago, LIVE Wire Distributors and Dealers everywhere make money selling Seal-Fast inner-tube repair kits because of the un- equalled efficiency and our aggressive and helpful sales promotion and advertising co- operation. _ Write Sales Manager for par- ticulars. Robert M. Bowes Co., Indian- apolis, Ind. HELP WANTED _$5-$10 HOURLY during spare or full time laying Stamco Marbleized Flooring. No experience necessary. Indestructible, noise- less, waterproof. Most substantial and or- namental interior flooring for homes, public buildings, ete. All colors, easily prepared and applied. One job brings many. Enor- mous profit. Field unlimited. Formula, complete instructions and sure selling plan, : Stamco Products, 2412-F, Ogden Ave., Chicago. WHAT is it worth to you? Distributor— District Manager—Salesmen or Agent—to have the agency for best line of Rubber Specialties on the market? Hot Water Bottles, Bathing Caps, Combination Shop- ping Bags, Pure Rubber and Rubberized Aprons, Rubber Gloves, and forty other fast-selling articles needed in every home. Profits range from 100 to 150 per cent. Write B. & G. Rubber Mfg. Co., 618 Penn Ave., Pittsburgh, Pa., Dept. 156. GOVERNMENT positions Men, womer 18, over Wanted for railway mail, posi office, other government positions, Examina tion soon Salary $1400-$1800 year. Ex perience not required Particulars free Write Columbia School of Civil Service 411 Pope Bidg., Washington, D. C, $100 MADE in one in small town without in local advertising week by young mar capital or expense business. Why can't you do likewise? Free book tells how. S Myer, 211 7th St., Louisville, Ky. DISTRIBUTOR or sales agency to repre sent line of sanitary brushes sold direct to home, Oldest concern, excellent proposition with exclusive territory. Large commissions Wire Grip, 29 Mercer St., New York, N. Y WOMEN wanted: Become costume de- signers. $140 month, Learn while earn- ing. Sample lesson free. Franklin Insti- tute, Dept. D-595, Rochester, N. Y. $35 WEEK. Learn while earning. Boys men. Become automobile experts, Write a Institute, Dept. D-401, Rochester, FIREMEN, brakemen, baggagemen, sleep- ing car, train porters (colored). $140-$200 Experience unnecessary. 810 Railway Bu- reau, East St. Louis, IL START Silvering Mirrors, Auto Head lights, Tableware, etc. Plans free. Clarence Sprinkle, Dept. 28, Marion, Ind. LEARN Plating—Automobile Refinishing. Plans Free. 427 Carroll St., Akron, MEN—Boys over 17. Government Railway Mail portunity. Commence $135 sure raise to $195. Painting Norman Rorick, Ohio. Become U. 8 Clerks. Big op- month. Quick Pleasant work traveling constantly. Every second wee off—with pay No _ layoffs Common education suf Pull unnecessary. Write immedi ately for free list Government positions open Franklin Institute, Dept. E-3. Rochester, N. Y. EARN Money at Home; We Pay You $15 to $50 weekly during spare time. No ex perience necessary writing show cards. We instruct by correspondence, and keep you in steady work Sho-Rite Sign System Dept. 270, 5439 Field Ave., Detroit, Mich STRICTLY Homework. We buy your product. Materials obtainable anywhere; ho canvassing nor experience; ong propositions plans, samples, formulas, 25c; details dime money back. Co-operative “Club, Augusta, Maine. WANTED—Men to learn motion picture machine operating. Positions secured Salary $50 weekly; small tuition in easy payments. Write today. Box Sioux Falls, South Dakota EARN $10 daily silvering mirrors, plat ing and refinishing metalware, autos, chan Outfits furnished. |! 286 Fifth Avenue, New deliers, bedsteads. Decie Laboratorie 3, York, N. MEN—Boys. Clerks, $125 Franklin Institute, New York. START Little Mail Order Business any where. Home employment evenings. Every thing furnished. Stamp brings Instructiy Booklet. H. Pier, 72 Cortlandt Street, New York, N Y. GOVERNMENT needs’ Railway Mail Clerks, $133 to $192 month. Write for free Become Railway Mail month Write immediate! Dept. E-21, Rochester specimen questions. Columbus Institut E2, Columbus, Ohio, = WANTED—Men—Boys over 17. Become Railway Mail Clerks. Commenve $1 month. Common education sufficien.. Lis positions free. Write immediately. Frank lin Institute, Dept. E-21, Rochester, N. GOOD prices paid for butterflies, insects See Sinclair's Display Advertisement, pace o7 ai. $135 MONTH. Become Railway Mai! Clerks, Big opportunity. List positic free. Write immediately. Franklin Inst tute, Dept. E-21, Rochester, N. Y. MANY Ways to Make Money, 25c. Browning, Memphis, Tenn. “WHAT to Invent for Profit’ fr ne News-B, Washington, D. C, U. GOVERNMENT Jobs. Men—Wom: $92 a $190 month. List positions o free. Write immediately Franklin |! tute, Dept. E21, Rochester, N W. D

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ju- fail ely ter hiv ory tive New fail free ute, pme 5133 List nk POPULAR MECHANICS ADVERTISING SECTION 45 SALESMEN—Become Independent. Own your business; experience unnecessary; seli- ing our $7,500 Accidental Death, = Acci- dent, $25 Sick Weekly Benefits; $12.50 year- ly; other amounts proportionate. Guaran- teed steady income from renewals. $250,000 deposited Insurance Department, Registra- tion Dept. A, Newark, N. J. SIGN Letter Agents and Painters: 500% Profit. Gold and Silver Sign Letters for Stores and Office Windows. Anyone can put on. Big demand. Free Samples. Me- tallic Letter Co., 431D N. Clark 8t., Chi- cago. FINGER Print Lesson based on Henry System included with Detective Course. Particulars free. Write, American System, 1968 Broadway, New York. WANTED—Men, women over 18 for United States Government positions. Good iy; lifetime jobs. Experience umnneces- ary. Write for full information. Chicago Civil Service College, Dept. A, Kesner, Huilding, Chicago. ALL men—women over 17, willing to ac- cept Government Positions $135 (Traveling or Stationary), write Mr. Ozment, 101 St. Louis, Mo. SILVERING mirrors, French plate taught. Fasy to learn, immense profits. Plans free, Wear Mirror Works, Excelsior Springs, Mo. UNITED _ States Government Wants Men. Excellent positions at attractive sal- aries. Railway Mail Examination soon. Let our expert (former United States Civil Service Examiner) you for this and other fine itions. Write today for free catalog PM. Patterson Civil Service School, Rochester, N. Y. JACOBUS Copy Pulls Business. Advertising Service, Irvington, N. COMMERCIAL Engraving and Printing, the most practical and complete book on en- graving, printing and allied subjects ever published. Over 800 pages and 1500 illus- trations presenting over 3500 distinct ideas on 35 separate subjects. Cloth, price $15.00 pode We highly recommend this book. opular Mechanics Dept., 6 N. Michi- gan Ave., Chicago. ADVERTISE in 24 Big Sunday Newspa- pers, 25 words $15.00. Catalog listing 1,000 leading Dailies, Weeklies, Magazines, 4c stamps. Union Advertising, Baltimore Bldg., Chicago. INCH Displa ew 161 Maga- zines Thrice $15. Year $50. Page $100. Wood’s Popular Service, Atlantic City, Jacobus N. J. MAILING LISTS 100 AGENTS’ names $2.00. Send for list of classifications. Pennell Company, Covington, Ky. EVERY county, 2,075 Nebraska farmers, 5 Jeston’s Service, Box 769, Omaha, TYPEWRITERS AND SUPPLIES TYPEWRITERS. All Makes. Save one- half. Thoroughly Rebuilt in our factory by the ‘famous “Young Process.’"” Fully guar- anteed. Free trial We handle all stand- ard makes. Cash or sold on easy terms. Write for Catalog. Young Typewriter Co., Dept. 320, Chicago, Ill. BE a Railway Traffic Inspector! $110 to $250 monthly; expenses paid after 3 months’ pare-time study. Splendid opportunities. Position guaranteed or money refunded. Write for free booklet CM-46, Stand. Busi- ness Training Inst., Buffalo, N. Y. toa UNDERWOOD Typewriters at far less than manufacturer’s price; rebuilt, all worn parts replaced, guaranteed as new. Cash, installment payments. rite for Cat- alogue A-151. Typewriter Emporium, es 1892, Montrose and Ravenswood Ave., Chi- cago, Ill. STORIES, poems, plays, etc., are for publication. G ideas bring big money. Submit manuscripts or write Literary Bu- reau, 522, Hannibal, Mo. START a Paying Business of Your Own. Be a business man. Any location. 8,000 new Tire Vulcani and Repair Stations needed, Business always good. Are you ambitious? $100 will start you. Write at ence. Wonderful opportunity. Equipment Co., 175 Canal, Cincinnati, Ohio. WRITE Articles, stories, news, in spare time for newspapers and magazines. Big pay. Copyright book free, Press Syndicate, 553, St. Louis, Mo. MAKE money writing Photo-plays; details free to veginners. No correspondence course. Producers’ League, 230 Wainwright, St. Louis. INVENTORS desiring to secure patents should write for our book, *‘How to Get Your Patent,”’ tells our terms and methods. Send sketch for our opinion of its patentable na- ture. Randolph & Co., Patent Actorneys, 620 F, Washington, D. C. OUR gts gold window sign letters are an excellent money-making proposition for a — & Sign System, St. Antotne roi FOR ADVERTISERS THOUSANDS maintain New York ad- dresses. Why? How to increase your ad- vertising results. Free. D. Way, 42 Broadway, New York. FIFTY genuine photo postals from any photo or preduct, $2.00; 500, $12.00; Sam- ples, 10c. Address Barbeau, Oswego, N. Y. 25 WORDS in 50 weekly and Sunday newspapers $5. Agency, 233, Cham- paign, TL INCH display 100 magazines, $4.00; three time, $8.00. Pennell Company, Covington, ADVERTISE your ad in 100 magazines or 5e per word. Sample copy 10c. Harley s Snell, 1021 State Ave., Cincinnati, Ohio. ~ You R_30-word advertisement in 75 maga- zines $1.50. Riley Publishers, 1333 8. 50th Court, Cicero, IL Aly Makes. $100 used typewriters, $6 up. ree trial. Write for illustrated Bar- gain ist 287. Northwestern Typewriter Ex- change, 320 Goethe Street, Chicago. TYPEWRITERS, all makes, $15.00 up. Guarantee five years. One month's free trial. Special proposition to agents. Type- writer Manufacture Exchange, Fordham, New York, INFORMATION RELIABLE information furnished on any subject or money refunded, T5c. Go-tipae- = ak ae Times Plaza, Box J64, Brook- yn, BUSINESS SERVICE SALES Managers: Exclusive state ter- ritories. Finger print check and signature protector, Positive identification. Cannot duplicate or alter. Attractive proposition. Address Chesney Finger Print Protector, Lincoln Inn Court, Cincinnati, Ohio. RELIABLE Information. Authority cn organizations, individuals, ratings; where buy or sell; personal calls; business repre- sented; contracts handled promptly; $1. Cottrell Service, P. O. Box 259, Chicago. SOUTH Carolina, Rock Hill, Collections, Legal Business. J. H. Foster. INCORPORATE. Our lawyers do the work, saving you time, annoyance and money in incorporating under the most liberal laws of Ar a. Laws and forms free. Southwest- ern Securities & Investment Co., Box D488, Phoenix, Ariz. DUPLICATORS AND DEVICES oo can make 50 to 100 copies of a let- ter, notice, etc., on three cents’ worth of Heyer Quality Compound. Write for free catalog and samples. The Heyer Duplicator Co., 162 N. Wells St., Chicago. WANT a “Modern”’ Duplicator to_ print Typewritten or Pen Written Letters, Draw- ings, Lessons, Music, Bids, Menus, Maps, Specifications or anything in one or more colors? Prints two a minute, $2.25 up. Special sale on; 30 Days Free Trial. Book- let Free. J. E. Durkin-Reeves Co., Pitts- burgh, Pa ADDING MACHINES NEW $3.50 Automatic Adding Machine. Adds, Substracts, Multiplies. Absolutely ac- curate. 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-C, Hollywood Ave., Chicago. FREE Trial, Marvelous new Adding Ma- chine. Adds, Subtracts, Multiplies, Divides, automatically. Work equals $350.00 ma- chine. Price only $15.00. Speedy, durable, handsome. Five-year guarantee. Used by largest corporations. Write today for cata- log and free trial offer. Lightning Calcu- lator Co., Dept. E, Grand Rapids, Mich. PRINTING, ENGRAVING AND MULTIGRAPHING 250 GOOD Bond Letterheads or Enve- lopes printed and mailed $1.50, or 1,000 for $4.50. — r Hatton Printing Co., Hatton, N. Dak. 150 NOTEHEADS, 100 white Envelopes printed and mailed $1.00. Samples print- ing free. ‘‘Sun Co.,"" Mohawk, New York. 500 LETTERHEADS and 500 Envelopes $4.65, 20 lb. bond paper. Samples. Well- man Printing Co., Huntington, West Va. 1,000 HAMMERMILL Letterheads or En- velopes $4.00. Full Line Samples Free. Quality Printshop, Marietta, Ohio. 1000 FULL-SIZE Hammermil! Bond Let- terheads $3.65. Postpaid. Cther stationery in proportion. Business building Multigraph letters cheap. Samples free. Charles B. Hatfield, Box 353, Owego, N. Y 5000 5%x8% CIRCULARS, $8.50; 5%x 6%, $6.50; 3%x5%, $4.50. Attractive col- a paper. Samples. Bargain List. Good's Printery, Harrisonburg, Va. PERFECT Printing. Everything reason- able. 1000 bond letterheads $4.75. Samples free. Address, Lewis Stationery Co., Troy, New York. 200 HAMMERMILL Bond Ietterheads, Envelopes, Billheads or Business Cards, $1.00 postpaid. Race Printing Company, Hudson, N. Y, ELEGANT Calling Cards, 33% com- mission. Agents, sample 25, your name, 25c. Good’s Printery, Harrisonburg, Va. GET our samples before ordering else- where. ‘‘Adverpress,”” Station C, Milwau- kee, MERCHANTS: Lowest prices on Highest Quality Advertising Pencils. Sample with your Ad. on imprinted in Gold, 10 cents. R _ & Co., 422 Walnut St., Yonkers, PRINTING Presses, Type, Supplies. No Junk. Catalog Free. Lawrence, 1426 South St. Francis, Wichita, Kan, 100 BOND Letterheads—100 Envelopes to match; embossed $2.00 Samples. Wolf Advertising Service, Danville, Il. WE print anyting. Circulars, stationery, Catalogs. Samples. Commercial Press, Ba- tavia, Chio. 100 BOND Letterheads, $1.35. Others reasonable Leonia, N. J. 100 =Envelopes Economic Pres: REDUCED prices for better printing. 1,000 Bond letter-heads, $5.00; 1,000 good envelopes, $4.25; 1,000 four-page folders, 3%x6 inches, $12.00. Catalogues, cir- culars, booklets our specialty. All printing at reduced prices. Samples free. antus, 525 S. Dearborn S8t., Chicago. QUANTITY Users save 30%. Wolf Roll Labels, Sta. E, Philadelphia. PRE-USED Printing Presses, Type and supplies. List for stamp. Popular Bar- gains, Richland, Pa. EMBOSSED business, personal stationery. Samples, stamp. Daniels Co., Pittston, Pa

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46 1.000 LETTERHEADS or_ Envelopes $3.00, sent prepaid. Samples Free. Moni- tor Press, Morrisville, Pa

PRINTING Outfits—Presses, type supplies type novelties Send stamp for catalogue Model Press, York, Penna

RAZORS AND BLADES

edge 2« W akonda, BLADES double, 3« Ss. D. resharpened ; one Ervin Mikkelson,

BLADES Resharpened 2c single edge, 3c

double. Guaranteed service Standard Safety Razor Corporation, Pittsburgh, Pa BLADES, resharpened, one edge 2c; dou- ble 3c. New York Edge Co., Glen Cove, a’.

FOR MEN

Men, if tender if your Forty sciatica or are gone, WHY Men Are Old at depressed, if backache, feet annoy you, if nerves sleep is disturbed, send for a simple drug- less treatment that cannot interfere with your work or doctor's care If you are suf- fering you will bless this book Write now before you forget. The Electro Thermal Co.,

2128 Main St., Steubenville, Ohio I WANT to send Free to every chronic pipe smoker in the country a good, big, generous sample package of my pure, sun- cured, nature-flavored Old Green River Pipe Tobacco No money to pay If you are a tobacco crank, all the better. Try the pure stuff. No syrup, flavoring or dope. After you try it free, I'll show you how to cut your smoke bill one-half and get more pipe joy. Just send name and address, and say whether you want mild, medium or strong. Pete Moberly, Box 820, Owensboro, Ky.

TOBACCO

HOMESPUN Smoking Tobacco, mellow—10 Ibs, $1.50; 20 Ibs 2.75; de- livery guaranteed. We furnish free recipe for preparing Smoking Tobacco Exchange, Sedalia, Ky. mild and 9 7h

PURE Red Leaf Tobacco quality guar- anteed. Best chewing, 4 Ibs. $1.25, 10 Ibs, $3.10. Mild smoking, 4 Ibs. $1.00, 10 Ibs, $2.10, delivered. O. D, Collier, Agent, Mar- tin, Tenn. “Collier is absolutely honest and reliable.’’ Martin Bank, Raymer, Cashier.

GUNS, SPORTING GOODS, ETC.

BASEBALL _ Players use Hollman’s Glove Pep. It’s great Softens the leather makes the ball stick, breaks in new gloves quickly; 2 sizes, 50¢ and $1 Send Paul Hollman Company, 6029 St. Lawrence Ave., Chicago, lil.

GUNS and Pistols of any tradley & Son, Savannah, make repaired. Ga,

OPTICAL GOODS

ULTRALEN’S Microscope. Patents pend- ing Model with magnification gradually variable from 2,500 to 62,500 times, $1.60. Others from 100 to 250,000 times Some- thing new Circular P-7 free Address, Specialty Mfg. Co., Milton, Pa

DIAMONDS, WATCHES AND JEWELRY

CHINESE Lucky Rings, said by the Chinese to bring good luck to wearer, gen- uine silver plated, come in ladies’ and gentlemen’s styles, adjustable, will fit any finger Price postpaid in plush-lined ring box, 50c, (no stamps.) William H, Me- Clure, 1257 South Jefferson, Saginaw, Mich ANTIQUES AND RELICS WORLD War Relics collected from Europe’s Battlefields Catalog 10c. War hotos, actual warfare, 275 diff. $5. Sample set 14 views 25ce, Lieut. Welsh, 50 Fort- greene, Brooklyn, N. Y.

GENUINE Indian Baskets and Wampum, Wholesale catalog. Gilham, Kelseyville, Cal.

FOR THE HOME

MAKE Inexpensive Iceless Refrigerator. Blueprint 35c, William Quemore, Cam- den, New Jersey.

PHONOGRAPHS AND RECORDS

BUILD a genuine Choraleon phonograph and save over half Big profit building and selling. We furnish motors, tone-arms, full instructions and all necessary parts. Send for catalog and free blueprint offer. Chora- eon Phonograph Co., 622 llth St., Elkhart, nd, POPULAR MECHANICS ADVERTISING SECTION

Mt SIC—Composed, arranged, orc} trated test service at “‘knockout’’ pric« Paul Jeffries, Michigan, Arctic, Atlant City, N VIOLINS—Deep, Mellow, Soulful—or eredit. Easy terms for wonderful istry ment. Get details today, Gustav F. He ning, Box 2043, Denver, Colo CORNETISTS — Trombonists — Saxop ists—Clarinetists. Send for ‘‘Free Pointers Name instrument. Virtuoso School. Buffal New York, WRITE Songs. Big money and reputatior Write for information. J. Gordon Pub. Co 201 N. Hoyne Ave., Chicago. I WANT Casper Nathan Garrick Chicago.

song Theatre poems, Building,

PATENT ATTORNEYS

PATENTS—“‘How to Obtain a Patent’ is the name of a book which every inventor should have. ‘It will be sent free upon request, and will tell you what you want to know about whole story patents. It contains the It describes the different parts of the application and explains in simple language the prosecution before the Patent Office, It tells about joint applications reissues, agreements, assignments, licenses interferences, infringments, process patent design patents, trade-marks, and prints and labels. If you are interested in patents either as an inventor, manufacturer or owner of a patent you will enjoy reading this bool which was written by a lawyer who has had twenty-five years’ experience in patent mat ters. If you have an invention and will send us a sketch, model or photograph of it we will promptly make a search of the Patent Office records and advise you whether or not, in our opinion, your invention is patent able, our charge for the service being $5.00. We feel that our experience twenty-five years has fitted us to render prompt and efficient service which will mer it your confidence. Write today. Talbert & Talbert, 463 Talbert Building, Washingto dD. C.

BUILD your own phonographs. We can supply you with motors, tone arms and all accessories at wholesale prices.. Write for catalogue AX Pieasing Sound Phonograph Co., 204 East 113th Street, New York, N. ¥

BUILD your own phonograph. Write for

our parts catalog American Phonograph Co., 3515 North Crawford, Chicago SUPERIOR Phonograph parts make real musical instruments Prices low Superior Phonoparts Co., Erie, Pa. WONDERFUL Cabinets.

Bargains in Phonograph Hunter Factory, McHenry, ILL

BUILD your phonograph. Quality Phono- parts, Highest quality spring and electric Motors, Tone Arms, Reproducers, Amplifiers, Case Material and Accessories. Free Blue Prints and Building Instructions. Big sav- ing. Wonderful results. New catalog mailed for ten cents Hoosier Manufacturing & Supply Co., Phonograph Supply Department, 313 Baldwin Block, Indianapolis, Ind

MUSIC AND MUSICAL INSTRUMENTS

: “IT WONDER Why You Hang Around.’ tiggest novelty song hit going Only l5e FISHING TACKLE per copy. Eastern Music Co., North Adams, Mass FISHERMEN, Attention! Don’t dig for SONG Writers-—Have wonderful proposi- worms, Wormite brings them out Some tion for poem or melody writers Ray Hib- thing new. No trouble Sample ten cents beler, D110, 4040 Dickens Av., Chicago. in coin Address, United Supply Bureau, ——$—————__— — Elizabeth. N. J. “MUSIC Composed’ to words. Bauer Bros. (formerly of Sousa’s Band), Oshkosh, Wis. MAIL old gold, unused postage, war and BOATS AND LAUNCHES thrift stamps, Liberty bonds, silver, plati- num, diamonds, jewelry, watches, false teeth, magneto points, etce., new or broken. 16’-ROWBOAT, 12% * -Rowboat, 12°. Cash immediately Held ten days, returned Folding Rowhoat Easily made Construc- if unsatisfactory Ohio Smelting Co., 205 tion blueprints 30c¢ each. Wee-Sho-U Co Lennox Building, Cleveland, Ohio, West Market, Detroit, Mich eras - <a RAG Jazz Piano, Saxophone, or Tenor PALMER four-cycle motor for Rowboats, Yacht Tenders. Price $98.00. Also two and four-cycle to seventy-five horsepower Cat- alogue free, Palmer Bros., Cos Cob, Conn

“HOW to make your Send for booklets. L. W 152 Kneeland St., Boston, boat leakproof.’’ Ferdinand & Co., Mass

Banjo in 20 lessons. Christensen Schools in most cities, or Learn by Mail. Write for Booklet, or money-making teacher's oppor- tunity. Axel Christensen, 16 E. Jackson, Chicago, Ill WE player North

Sell and Standard Ave suy rolls Wabash Exchange 65-note Music Co., 183 Chicago, Iil PATENTS promptly procured. Persona! careful and efficient service Highest ref: ences Moderate fees Send = sketch model for actual search and advice. Georg P. Kimmel, Master of Patent Law, 51 Loan and Trust Bldg., Washington, D. ¢ WOODWARD. New Book sketch H, L. Woodward, 714 ington, PATENT, Trade-mark and Copyright s; cialist Prompt, personal efficient ser ice. Advice on request. M. E, Jones, Law yer, 509B 7th St., Washington, D. C

Send y 9th, Was!

PATENTS. Booklet free. Highest refer ences. Best results Promptness assured Send model ot drawing for preliminary ex amination. Watson EE. Coleman late Lawyer, 624 F Street, Washington, D. C. ROPB, Robb & Hili offer a_ strictly professional service to manufacturers and inventors in patenting inventions and regi tering trade-marks, a service which is the result of 20 years’ experience Write for free booklet and names of prominent man‘ facturers and inventors represented by u Send sketch for preliminary advice, 811 M Lachlen Bldg., Washington, D. ; 1348 Hanna Bidg., Cleveland, Ohio. PATENTS — Trademarks — Write for « free illustrated guide book and Evidence Conception Blank. Send model or sketch and description and we will give our opinion its patentable nature free. Highest references Prompt attention Reasonable term V tor J. Evans & Co., 166 Ninth, Washingt Db. C. INVENTORS!

Send sketch or model your invention for opinion concerning pat entable nature and exact cost of applying for patent. Book, ‘‘How to Obtain a l’a ent,’ sent free. Gives information on pat procedure and tells what every § inver should know. Established twenty-eight y« Chandiee & Chandlee, 426 Seventh 5! Washington, D. C.

PATENTS—Herbert Jenner, patent art ney and mechanical expert, 622 F St., Was! ington, D. C. 1 report if a patent can be ha and its exact cost. Send for circular

PATENTS—Trademark, copyright; fol Write Metzger, Wa free; results procured | ington D. ¢

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POPULAR MECHANICS ADVERTISING SECTION 47 PATENT your invention. But note: a patent is no better than its claims. Be sure ur patent is as good as your invention. Patent claims skillfully drafted by Lamb & eo., I SS 1419 G Street, Wash- gton VATENTS, Trademarks. Before disclos- g an invention, the inventor should write my blank form Evidence of Conception. rhis should be signed, witnessed and re- rned to me with sketch or model, upon re- cipt of which I will promptly render opin- as to patentable nature and send book- on Patents. Highest references. Prompt ention. Reasonable terms. Clarence B. 0 Brien, Registered Patent Lawyer, Seventh Fioor, Southern Bldg., Washington, D. PATENTS Procured, Trademarks Regis- d A comprehensive, experienced, mpt service for the protection and de- lopment of your ideas. Preliminary ad- « gladly furnished without charge. oklet of information and form for dis- ing idea free on request. Richard B. Owen, 30 Owen Bidg., Washington, D. C., 2276-R, Woolworth Bidg., New York. VvATENTS, Trademarks. Thirty-five urs’ experience. Send model or sketch or opinion as to_ patentability. Free Invention Guide.” Highest references and personal attention assure best results. Franklin H. Hough, 522 Washington Loan & Trust Bldg., Washington, D. C. PATENTS—Prompt, personal efficient ser- ice by an attorney-at-law, skilled in all inches of Patent Practice. Over 12 ars’ actual experience; full information pon request. B. P. Fishburne, 331 Mec- | Bidg., Washington, D. C. PROTECT Your Rights. Write for Record f Invention which contains form to estab- lish evidence of conception of your inven- tion. Prompt personal service. Prelim- ary advice without charge J. Reaney Kelly, 612G, Columbian Bidg., Washing- dD. PATENTS, Trademarks, Designs and Copyrights. Registered firm of attorneys- t-law Careful, prompt, personal service assured. Moderate fees. Full information free upon request. Gross & Collings, Ouray Bidg., Washington, D, C PATENTS Secured. Co-operative per- al service. Send sketch or model for earch of U. 8S. patents and patentability nion. Moderate fees, payable in in- tallments Trademarks. Eugene Stevens, Barrister Bldg., Washington, D. C. 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 de- vice, explaining its operation. All com- munications are strictly confidential. Our vast practice, extending over a period of seventy years, enables us in many cases to advise in regard to patentability without expense to the client. Our Hand-Book on Patents is sent free on request. This ex- plains our methods, terms, etc., in regard to Patents, Trade Marks, Foreign Patents, ete. “Scientific American’’ contains Patent Office Notes. Decisions of interest to in- ventors, and particulars of recently patented inventions. Munn & Co., Solicitors of Pat- ents, 623 Woolworth Bidg., New York; Scientific American Bidg., Washington, D. C.; 801 A Tower Bidg., Chicago, Iil.; 611 Hanna Bidg., Cleveland, Ohio; Hobart Bldg., 582 Market St., San Francisco, Calif. PATENTS—‘‘How to Obtain a Patent’ is the name of a book which every in- ventor should have. It will be sent free upon request, and will tell you what you want to know about patents. It contains the whole story. It describes the different parts of the application and explains in simple language the prosecution before the Patent Office. It tells about joint applica- licenses, interferences, infringmeuts, process patents, design patents, trade-marks, and prints and labels. If you are interested in patents either as an inventor, manufac- turer or owner of a patent you will enjoy reading this book which was written by lawyer who has had twenty-five years’ ex- perience in patent matters. If you have an invention and will send us a sketch model, or photograph of it we will promptly make a search of the Patent Office records and advise you whether or not, in our opinion, your invention is patentable, our charge for the service being $5.00. We feel that our experience of twenty-five years has fitted us to render prompt and efficient ce which will merit your confidence. Write today. Talbert & Talbert, 464 Tal- bert Building, Washington, D. C. PATENTS = Secured. Prompt service. Avoid dangerous delays. Send for our “‘Record of Invention’’ form and Free Book telling How to Obtain a Patent. Send sketch or model for examination. Pre- liminary advice without charge. Highest References. Write today. J. L. Jackson & Co., 244 Ouray Bidg., Washington, D. C. 900 MECHANICAL Movements and 60 Perpetual Motions illustrated and explained in my book. Inventor’s Universal Educator, 5th Edition—Tells how to procure and sell patents. Government and other costs. Covers the Be from A to Z—160 - a rd bound. Contains noted risions 8. Supreme and State Courts on Pateas cases. Mechanical Movements greatly assist inventors—suggest new ideas that might eee of great aid in perfecting inventions. ells how to select an Attorney. Has valu- able information regarding Patent Sharks. Selling Agents and promoters. Price, $2. l’ostage free everywhere. Fred G. Dieterich, 621 Ouray Bldg., Washington, D. C. PROTECT Your Rights. Write for Ree- ord of Invention whch contains form to es- tablish evidence of conception of your inven- tion. Prompt personal service. Prelimi- nary advice without charge J. Reaney Kelly, 612 G, Columbian Bldg., Washing- ton, Dd. Cc. PATENTS. Have you an idea to patent? Write for ‘‘Inventors Record’’ and Instrue- tions for its use Terms and advice sent immediately upon request Address, Wm H. Mulligan, 135 Woodward Bidg., Wash- ington, D. C INVENTORS, if you have an idea, before spending unnecessary money for a patent, write Inventors & Engineers Consulting Co., P. O. Box 344, Washington, D. C INVENTIONS. If you have one we may develop and make it for you. Special facili- ties, confidential service, square deal. Castonguay Engineers, Thompsonville, Conn “INVENTOR’'S Guide,” free on request; end very valuable information and advice rite Frank Ledermann, 21 Park Row, New York, N. Y. MODEL Making and experimental work: Modern Shop; expert workmen. Manufac- turing. Lamson Model and Experimental Works, 625 W. Jackson, Chicago. I SELL Patents. Established 1900. Ad- dress, Charles A. Scott, 773PM Garson Avenue, Rochester, N. Y. PATENTS. Write for free illustrated guide . Send model or sketch and description for free opinion of its patentable nature Hi t references. Prompt attention. Rea- sonable terms. Victor J. Evans & Co., 157 Ninth, Washington. D. C. HAVE You an Invention? If so, write for our free book. “‘How to Get Your Patent,” tells our terms and methods. Send model or sketch for our opinion of its patentable na- oe. gngndetee & Co., Dept. 144, Washing- on INVENTORS. Send sketch or model of invention for advice Write for Evidence of Discl e form and Book on Patents, PATENTS and Trademarks obtained. Prompt service. Write for our new book patents. Established in 1889. DP. viftt & Co., 369 7th St, Washington, Dd. c PATENT applications filed on partial yment plan. Trademarks, copyrights, etc. \ilo B. Stevens & Co., 685 F St., Wash- ton; 352 Monadnock Bik., Chicago. Es- blished 1864. VvATENTS. Have you an idea to patent? Write for ‘Inventors Record’’ and Instruc- us for its use. Terms and advice sent mediately upon request. Address, Wm. I! Mulligan, 134 Woodward Bidg., Wash- gton, D. C. INVENTORS—Send for form ‘Evidence f Conception’ to be signed and witnessed. Form, fee schedule, information _ free. Lancaster & aoa, 221 Ouray Bidg., Ww ashington, Dd. INVENTORS Aided. Ideas developed. We seek the valid patents. Richardson & Rogers, 7 Albee Building, Washington. }xperimental machinery built. Practice in all courts, COMPLETE patent applications $15. To uy or sell patents write Patent News-G, Washington, D. C. Only Inventors” news- per. Yearly $2. Copy 20c > MONROE MILLER, Ouray’ Building, Washington, D. C., patent attorney, me- hanieal and electrical expert. Best quality ' work and results. Moderate charges. INVENTORS’ Guide,”’ free on request; ves Very valuable information and advice. ‘rite Frank Ledermann, 21 Park Row, Ww York, we Free. Prompt Service. Merton-Roberts & a, 182 Mather Building, Washing- ton, D. Cc. LATEST Book on Patents. H. L. Wood- ward, 711 9th, Washington. Send your idea. PATENTS, Trademarks Before disclos- ing an invention, the inventor should write for my blank form Evidence of Conception This should be signed, witnessed and re- turned to me with sketch or model, upon receipt of which I will promptly render opinion as to patentable nature and send booklet on Patents. Highest references. Prompt attention Reasonable terms. Clarence B. O’Brien, Registered Patent Lawyer, Seventh Floor, Southern Bidg., Washington, D. C. MODELS— Developing your idea, mfgr. same is my specialty. Why experiment? Write me and get facts. Henry Backer & Co., 904 Evans, Cincinnati, O PATENTS FOR SALE PATENTS _ secured. Prompt service Avoid dangerous delays Send for our “Record of Invention’’ form and Free Book telling How to Obtain a Patent. Send sketch or model for examination Pre liminary advice without charge. Highest references. Write today. J. L. Jackson & Co., 242 Ovravy Bldg., Washington. D. C ANTI-SLIPPING Sandal or Gaiter— 13,474-1; Coat Fasteners—13,508-1 Ad justable Skirt Hanger—13,561-1; Anti- Skid or Traction Chain for Wheels 13,711 1; Jack for Journal Boxes—13,211-1 Tal- oy & Talbert, Talbert Bidg W ashington, » € PATENTS Procured. Trademarks Regis- tered. A comprehensive, experienced prompt service for the protection and devel- opment of your ideas. Preliminary advice gladly furnished without charge Booklet of information and form for disclosing idea free on request Richard B. Owen, %0 Owen Bidg., Washington, D. C., or 2276-R, Woolworth Bldg.. New York, INVENTORS and Manufacturers For developing your invention, designing and constructing Automatic Machinery, Labhor- saving Devices for all purposes, Coin-Con- trolled Beverage and Food-Dispensing Ma- chines, Consult John Frick, Mechanical En- gineer, 1640 N. Park Ave., Philadelphia, Pa. AUTO Signal, visible al! directions, ad- vance of danger, manually operated, il- luminated, disappearing: rig stop; fits any vehicle. Al! year seller. Ad vertises itself. a. a ty 27 West Ohio St., Chicago INVENTORS Send sketch or model of invention for advic« Write for Evidence of Disclosure form and Beok on Patents, Free Prompt Service Merton-Roberts & Com pany, 181 Mather Building, Washington, dD. Cc CASH or Royalty Auto safety adjustable PATENTS Obtained Complete applica- tion $15 “Patent News Plan’ saves money. Patent News-E, Washington, D. C. GET your own patent Complete instruc- tions $1. Cutting Sons, Campbeli, Calif. INVENTORS: We sell patents on com- mission. Patent Co,., Peterson, Iowa. headlight focusing device with mechanism operating from dash d. Patent pending Simmons, Fortes & Smith, Box 595, Rocky Mount, N. ¢ : PATENT us Sectional Boat Very meritorious and practical device. Will sell outright or on royalty. Write: 8, Zgliczynski, Patterson Station, Box 11, Baltimore, Md AN Automatic newspaper dispensing de- vice; have a perfect working model; out- right, royalty, or partner M. A. Kelley, 4222 Calumet Ave., Chicago.

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48

7 PATENTS Land Rolle Chicken Feeder, Cement Block Machine Mixer, Post Mold and Staple Fastener. W Keller, Kearney, Nebr. DON'T miss this big profit; three new much needed articles. S., Canadian, I oughtright or royalty Address Alex Nagy, LY Livonia, N,

ROTATABLE elbow

- shaped chimney cowl, positioned by the wind; prevents dow! draughts. Best offer accepted, Will Me- Cullough, Salem, Ma. NEW Book. Send sketch of your idea for proper advice. H, L. Woodward, 713 9$th, Washington.

NEW cheap household necessity for daily use. Frank Beuckman, 534 N. 22nd Street, East St. Louis, Ill PATENT = 1,353,582 Music-stand turner Reasonable offer takes it. ticulars. J. O. Gemsey, Montevideo, OUTRIGHT or Royalty

8 leaf Par- Minn Cushion handle

scissors Patent pending Write L Warren, Como, Miss. DON’T buy or manufacture without book by H. L. Woodward, 701 9th, Washington SEVEN Inventions. Sale or royalty Uneke Sales Co., Nevada, Mo. OUTRIGHT or Royalty—Resilient wheel for automobiles and_ trucks All metallic wheel, outside of the rubber fabric tire No punctures, blowouts; no air. Strong light, cheap to manufacture. Patent pend- ing J. E. McRoberts, Box 181, Parma, Idaho. ~ FOR Sale—vU.

S. and German patents on

CASH Safety P. S. Smith, Box OUTRIGHT: ter investigate. lubricator 595, Rocky Pat. No. 1,128,871. Chas. Holik, Sparks, land roller, chicken feeder, machine mixer, post mold fastener. W. lL. Keller, Kear- filling plug. Mount, N N. C, Bet- Okla.

7 PATENTS, cement block, and staple ney, Nebr. Yo you?

have a worth-while Why don’t you tell our two readers about it? Most of them cially interested in patents and new inven- tions. Ask me to tell you how other in- ventors successfully sold their patents. J. Roy McClellan, Manager, Classified Adver- tising, Popular Mechanics Magazine, Chi- cago, Ill. FOR Sele: scratcher, haven't million are spe- patent,

Handy and economical match Can ‘

be pinned on inside of garment, Cash or royalty. Big seller. E, L. Hane, 3346 Warner, Chicago, Ill. PATENT 1,392,105 on Tube Brushes, for sale. J. Bergesen, Sr., 261 E. 3lst, Brook- lyn, New York, PATENTED

cattle dehorner for sale out- right, royalty or partnership. Make offer. Van Amber, 7326 Princeton Ave., Chi- cago.

MODELS AND MODEL SUPPLIES

MODELS and Patterns manufacturing Address H. Mason City, Lowa. Light made. W. Hathorn,

WE make working models tor imventors and do experimettal work and carry 2 com- plete stock of brass gears and model sup-

POPULAR MECHANICS ADVERTISING SECTION METAL Specialties, Dies, Tools, Pat Articles, made for Canadian market. To & Stampings, Limited, Toronto, Canada MODEL Making and experimental Modern Shop expert workmen. Manufact ing Lamson Model and Experimy Works, 625 W, Jackson, Chicago. EXPERIMENTS developed, dies, mod and manufacturing, machine designing }

wor

timates and information promptly give: Address Schroer Bros. Machine Works, East 25th Street, Kansas City, Mo.

METAL Specialties. If of metal, we make it for you. Complete equipment. Ws: ern Die & Stamping Works, 721 Fulton s: Chicago, Il.

IF you want dies and metal stamping write us. Lyons Machine Works, L la. SPECIAL Devices and Machinery 4 veloped and built and fixtures at reasonable rates. Jig designed and built for inter changeable and economical manufacturing Punches and dies made for all kinds « metal stamping Machine work to order Simplex Tool Company, Woonsocket, R. |

WIRE Goods, all kinds made to order Cooley Mfg. Co., 524-530 N. Western Ave Chicago. LET us be your factory! Write toda Logan Machine Company, 222 South Clint Street, Chicago, Illinois.

f

DRAWING INSTRUMENTS

: 4. “ : ao plies. Send for catalogue. The Pierce Macel BARGAIN price. 5%” Compass Draw Egg Separator, issued 1913. rite for Works, Tinley Park, Ill. ing Set, with pen and pencil attachme: - F > ‘ Se » ° y . drawings and specifications. Sell cheap for and lengthening bar Bow Spacer, B ee ee) Sees ee INVENTORS—Write for our free illus- | Pencil, Bow Pen, 2 Ruling Pens, Box { ‘ , rate ee , trated guide book and Evidence of Concep- | Leads. Cloth pocket-book case, _ vely PATENT: Tool that every carpenter must tion Blank. Highest references. Prompt at- lines, complete i Send_ for particular use. If you want to manufacture and mar- tention. Reasonable Terms. Victor J. Evans Kolesch & Co., 138 B Fulton Street, N ket a practical self-selling tool, here is | & Co., 165 Ninth, Washington, D. C. York your opportunity. Hancil Cordrey, Chula —— — Vista, Calif, PUNCH.Press work, tool and die making, = " . - model and special machine work wanted SURVEYING INSTRUMENTS s a Sale—State ~ ——— a. Se Completely equipped with new machinery of ional merry-go-round; horses jump hurdles the latest type. Prompt delivery, reasonabl ‘ . and the like Patent applied for. F. Bur- prices onestaneads Quality Nhs teen & THE Golden Combination; complete draw row, 131 South Ave. 19th, Los Angeles, Machine Co., 6154-56 N. Clark St., Chicago ing outfit in ane instrument. Used by St Calif . : : . : — lents, Civil Engineers, Abstractors, Draft ; MODEL making and experimental work; paces ishiae ete. Write for free noth ANTI-THEFT device for automobiles. Has Modern Shop expert workmen, Manufactur- | Golden Compass Co., Elkhart, Ind. been tested for over a year Manufactured ing. Lamson Model and Experimental 7 be cheaply. test offer Address George A Works, 625 W. Jackson, Chicago. NEW and used surveying instruments Ifarris,. Terre Haute, Ind, R. R. C rect from factory. Satisfaction guarant: Gin wry "ct ” on o y 7 od. ssler, 619 Bros 1 MANUFACTURING, 3c, sells 25c—wire. FOR MANUFACTURERS St ym 4 refunded. Wissler, 619 Broadw I5e, sells 50c—sheet metal Demand un- pov ne limited; blessing to every farmer Health failing—must sell both Fredrick Back- ATTENTION, Mf: Poultry Fumigator, MACHINERY, TOOLS AND SUPPLIES lind, Detroit, Minnesota. new invention; sell reasonable, Andrew = Woudema, De Motte, Ind. OUTRIGHT or Royalty—Adjustable lad- Sonatas dliredasssce Terese aed MACHINISTS. Attention! Why not der avoids danger of tipping on sloping vr MODEL making and experimental work; alf Sivak cian Geen dae ofl ice level ground ; very practical Martit Enke, Modern Shop expert workmen. Manufactur- ~~ SR pan Be dw 1346 East 28th St., Oakland, Calif ing. Lamson Model and Experimental | cabinet projection, and detail drawing PATENT for sale, portable sheet-metal Works, 625 W. Jackson, Chicago. > we ge | i oe < ~ ge and instruct water gate for irrigation; simple, practical, PATENT Rights—Worth $25,000 to any or latest type standard size suitcase sty aa ton Ber dates wie & OC. Specialty Manufacturer. Address all in. | tool case. Five large blue-prints, | pr Edwards, Box 932, El Centro, Calif quiries to L. J. Aldridge, Victor, N. Y¥. t ae ya + R. Davis, 909 " ae . ; ; z Sth St., avenport, owa. PATENT 1,151,573, handkerchief cootng WANTED—Metal Stamping and Model : device for fever and headaches; made of work taken on contract basis. We are FOR Sale. 24”x10” Engine Lathe, Ta metal; no competition Make offer. J ideally located and equipped to develop | Attachment, Screw-cutting, all char Dolgonas, 1520 N. Washtenaw Ave., Chi- patents. Meyers Company, Box 263, Bed- | sears. Price $250.00, Gallagher Br cago, ford, Ind. Uhrichsville, Ohio. IMMENSE fortune to be made on two | [EXPERT Drafting and Engineering Serv- PULLEYS, Grooved and Motor. Red new electrical devices, Patents pending ice Designs furnished, Rates reasonable. ing Gears Light Transmission Machin: For full _ particulars, address _ Nicholas Pelishek Engineering Company, Clinton- Send for catalog. Winfield H. Smith, Bu Feinen, 277 Grant St., Buffalo, N. Y ville, Wisconsin. falo, N. Y. FOR Sale or Royalty, adjustable knee sup- ONE 16x6 Engine lathe, 200.00; port, applicable to all guitars for Hawaiian MANUFACTURING Kempsmith universal milling machi Steel Guitar playing Cc. A. Ullman, 1980 $175.00; one 24-inch drill press, $185. Estrella Ave., Los Angeles, Calif. : : ~ : one straighten arbor press, $30.00; quant LET us be your machine shop! We build of chucks, small tool. Standard Mach FOR Sale—United States Patented Traf- models and will do your manufacturing. Tool Co., Columbus, 0. = : fic Signal for automobiles; visible all direc- Victor Eng. Co., 2524 W. Chicago Avenue, a Ginn H. Pope, Canada. tions. 169 Ahrens St., Ontario, Kitchener,

PATENT: Ford and Chevrolet tank cap, without threads or spring; sale or royalty Cc ’. Arnason, Balaton, Minn PATENTS For Sale To sell, buy or ob- tain patents write Patent News—P, Wash- ington, D q ICE-CREAM Bar application; new idea; real money-maker; excellent for proposition promoter. Holco, Annawan, Ill

RECENT Issue, stamped metal specialty; cheap; Big market l Becker, Mack- inaw,

| Chicago. PATENTED Articles, Models,

Brass Work.

Machine Construction; Dies Made. Baum’s Metal Specialties, Kansas City, Mo. STANDARD Metal Stamping Works, Tools, Dies, Patents. POWER Users—Have economy and advisability steam thentic 224 Centre, New York.

you considered the of changing from to gas producer operation? Our au- book ‘‘Power Gas and the Gas Pro- ducer,”’ written by a recognized authority on this subject will enable you to judge intelligently. Price, $1. postpaid. Popular Mechanics Book Dept., 6 N. Michigan Ave., Chicago.

CONCRETE Mixers, 3-ft. capacity, $39.9 i 1% horsepower engine and magn Circular free. Address McCart! Brothers, Port Washington, Wis LAG your pulleys than leather. prepaid, $4.

rivets. Bet 20 years’ success. 10 sq. f W. S. Raymond, Niles, Mi CONCRETE Building Block Machines a without

Molds. Catalogue free. Concrete Machi Co., 303 South Third St., St. Louis, Mo WANTED Information about new compressors. Write for free manual Er gineers Dept., Brunner Mfg. Co., [ ms Ms

Page 215

POPULAR MECHANICS ADVERTISING SECTION 49 TOOL Handy Set, made of best steel most useful and practical tool on the t Postpaid $1.25 National Special- 2M Union Sq New York City OTHERS have successfully sold their ma- ! through our umns » can you. for proof J. Roy McClellan, Man- Classified Advertisiig, Popular Me- Magazine, Chicago ENGINES, MOTORS AND DYNAMOS dol- current dollars ttville, Pa. FOR Sak New footpower thirty oO fourth horsepower rect r tat tt ty-Hve Theodore Carlson, Kelle ELECTRICITY Taught by experts; earn while you learn at home electrical book and proof lessons free; your success guar- anteed and position secured a wo hn Works Chicago gineering rence Ave . Dept 1A 2144 Law ELECTRIC motor sockets, wire nduit and supplies, includi cleats, loot I witches New revised wholesal prices. Illustrated Catalog Hyre Electric ¢ 633-GH, South Dearborn 8S Chicag PAYMENTS easy monthly brings Elec- tric Motcrs. Any size. Hobartmotors, Troy, Vhio FOR MECHANICS ) WILL purchase a new \% h. p. 60- l r. Get one while they last. Bellevill I! PROVED Robertson-Thompson Steam Indicator with reducing wheel, three } et complete, pric $45.00 prac- Ww Wissler, 629 North Broadway, OMOBILE Owners, Garagemen Me- RKepairmer send t copy of nt issue. It contains helpful, in informatior overhauling ignt- Abie wiring irburetors storage Over 14 pe illustrated Automobile Di- incinnatl es, © 7 Butler py ‘ sldg., PECIAL Garage General Electric Co, 1 41 : P., $110.00; 3 H. P., $128.50; 5 H. P., All sizes, both single and Poly- Motors, for immediate delivery. Special ging generators, all voltages Write for Manufactured By g Motor Sales De; 15, West End, irgh, Pa LECTRIC Motors, 5¢ Heavy Duty % Pp r General Electri and other 110 Volt, 60 Cy Single \ riginal pa ages laranteed ( I yivania Exchange l’a ALTERNATING and direct irrent motor r New and rebuilt All guaranteed year Special prices Get our price before buying. Motors exchanged and j Hyre rn St., Electric C ( RM Chicago. South ELECTRICAL Machines, Universal, Portable $30.00 and $65.00; Electric and & Ib $2.50 and $3.15 ; Motors, $9.00 and up Dry Cells and ght Batteries Xe and 10 Nitrogea, Lam] Fans, et it extremely es. Agents with capital wanted. All 1 standard, new, guaranteed Send t t lists W buy yu surplus Blum 254 W ilst Jlec- Strauss «& w York, INVENTORS Send sketch or model of invention for advice Write for Evide e of Disclosure form and = Bool on Patents, Free Prompt Service Merton-Roberts & Company, 183 Mather Building, Washing- ton, D. C ALUMINUM Solder that will stand the test Send ft sample no personal ‘ is). Formula $5.00 John Brackman, 7 South Oakley l IF you have an id free book, ‘‘Patent Advice und full it tructions for proceeding Address Wt iH iward Bldg Mulligan, 133 Wo Washing ton, D. C Notes Volume 17 mtains 702 a 3 ih as Half Trav Boring Machine, Toggle Pr red Forge, Oil-Gas Generator, Mo ble for Drill Press, et 224 pp. 496 ills 1) nts } tpaid Popular Mechanics took Dept., 6 N. Michigan Ave cl ig PATENTS guide book Write for our free illustrated and Evidence of Conception Isiatl Send model for sketch and descr tion of the invention for our opinion of its patentable nature free. Highest references Prompt attention Reasonable terms Vic- tor J. Evans & Co., 184 Ninth, Washingt Db. C BLACKSMITHS BLACKSMITHS Farmers Inventors, ve be } f Here's what y werful Iron Bender. Bar tructed Bends any shape Capacity . ad 1%” dia. hot Price $7.00 or if 1 prefer » make one you lif w wor y lrawings f fift ts A Hossfeld, 815 Kk. Center St., BLACKSMITHS, Lister Any Handy man can make m re money d 3 easy Forging and welding solid, with Toy’s Mod- ern Methods of Blacksmithing Hardening and tempering to a standard with red tempering charts A for e dollar. Sam ples Free. W. M. Toy, Sidney, O ELECTRICITY For 10 \ » Generator Op any ma ! Produces ¢ for Mov i ire Machines Schools I i ‘ Ete free par 1 Monarch Thea Supply Co yep. AG 724 South Wabash Ave., Chicago POWER Attachment for Ice Cream $7 ) Cat tached to at i ze! Gives the g luction be ud f Z Winfield H, Buffalo, N. Y. Hf. P. ELECTRIC M Repulsion I Ss 1 | make 110-220 ¥ gle phase, 1725 R. P. M Pr ) I oO. 1 Cl i ish w W 1 i quiren ts in el i W“ 1ave ( 1 A I r Sales Co 20) Ea Jack 1 Chicag Lil RARGAIN—New 1 Wag le ty y 1 3 ) at yu price $12 ash h ‘ g Electr ( Ss h S Chicago RENEW Dry Ratter ruara 1 p J I N RK FOR THE SHOP SHOP Notes for 1922—Bench Lathe, Fl tri Soldering O ( I Troubles Road R neh Oh : tench Miller, are among the urticles in this new volume 224 pp ) ee paid Popular Mechar Book Dept., 6 N. Mich- igan Ave., Chicago FOR SALE—MISCELLANEOUS | 15-CENT repainted Golf Balls $1.75 dozen; also be r grades 000 New f Clubs, Bags and Balls, best make at spe al prices Ladies and Gent right and left-hand clubs All Guaranteed Send for free price list. Money refunded. Free delivery on every $10.00 purchas Weil Cur ty Shop, 20 South Second St., Philadelphia BRAND new aute with 10 Ibs Big money 1 tll REVOLUTIONARY Scientific Achievement Price 30c, Pri : ver and all tar Rose, 1352 Clint ADDRESSOG Letter ‘ rs, iltigr 8 nvelope Sealers, Duplicators th half price, Guaranteed, Pruitt ( , 112-B N, La Salle, Chicago th p ! hed meta Ad Ave., Bronx, N M LUMINOUS Paint Rottle Labora tories H, Box 316, Portland, Or REAL ESTATE AND FARM LANDS GOOD Farm Lands 20, 4 Acre tra r } tling city in Micl i $15 t > I 1 only $10 to $50 wn and > to $20 per 1 th Inv gate his I Write today for I ! t KR i formation Swigart i Co P-1259 Fir National Ba ild cl ig $700 GETS 240-A Farm, with H r ry Cows i Calves, 1 t I i road; 10 I looking 1 g oO $3,850 with $700 Pag Free Cat Ss t Fa Ag )-] Nassau Ne York Cit Y OKLAHOMA I s W f forma tion Bua fc t Shav Okla $5.00 DOWN, $5 ) monthly: 20 ur ed fruit t I lt “ jlland (zat I g. hunting rapt M4 Acidres Alfred Zimmer 1800 N, I I ( Ka 4 ATTENTION ( Acq 1 Cash for Fart H Retail Stor » ma re i lential > Ha Busine A ( t- Ohio I WANT I s for h | il ‘ + R. A. MeN W Didg 0 1 Nel FLORIDA O i ! is Ww As mos ( w r ‘ ! i f Vay from r t 8 4 M ll t miss Ww t i i f grov ir L ! A i f many i K wr f I J t I I e ‘ I io A 4 I \ Fruitland Park, Fla FREE G t La 0 ? 1 112 page book V B 4 I i lists and d ~ 1 very inty I S tells i pla to hov red F l igrat and | “ Ww t ) nts } s id w Publishir ( Dept. 71 j St. | M ] | Mi NESOTA pg 7 imber I Add 3 l I New R i, W | SELL y r proy y y f asi > t r where | i DD pay big t ! Dar f Real Esta Salesr ( LD B, Lit Neb WANTED—MISCELLANEOUS PARCEL Mail Boxes, s rustpeoofed $4.00. 17x17x14. Motivepower, ¢ Ono, AIR Compre t T ill I Cle iH l p us $ Ba ( ging f r (rarag vA S14 I \ \ * Vi Drill 1 (ir ler $25 00 S > 2 g pag atalogu all kind Compressors, Vulecar (Farage i J hut I i Co 167 ¢ With M ’ $7 Suitable fo ile CASH Paid Mail us your discar i ‘ ! ix i ! I \ Sa | Stamps and old H = M ent I | a i ] l 4 ’ " i ~ ~ g W I 0 I Dej 7 ( 4 I DOGS, BIRDS, POULTRY AND PETS FOR Sal guaranteed { i i] 6 It itv 1 Foxhound 1] guarant Write ri ' it rr

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POPULAR MECHANICS ADVERTISING SECTION

ATREDALE and Boston Puppies for sale. PERSONAL Ripon Kennels, Ripon, Wis. OPPORTUNITY Calls You Success SILVERBLACK Foxes $300, Skunks $10. awaits you Join the Thought, Force, Time payment Booklet dime, Arthur | Health, Success Association Secure seven Schumacher, Lockland, O, wonderful lessons which positively teach you oe the laws of Concentration, Success, Memory, WHITE Mice, $1.15 pair, prepaid: great | Will. Power, Influencing Others, Read pets Frank Wyss, 2033 Arapahoe, Denver, People at Sight, Self-Control, Banishing Colo Fear Procure these Remarkable Formulas ieee Develop the power God gave you, make 0G wners’ Text Ro. aad RES good use of it Write for information to- dae for dog | mel ~ ae 5° ba ey on f. Hancil Cordrey, Box 175, Chula Vista, feeding r of 4 Sent free with — three scr to Sportsman’s | GRAPHOLOGIC study of character. Fi Digest. : 25 ! (coin or stamps) to- trial study send 25c¢ and handwriting of day Sportsman’s Digest 07 Butler Bldg., ourself or anyone whose character may in Cincinnati, O. terest you. Address Amad. Feyo, Box 140, — Station G. New York City, N. Y¥ BARGAINS Collies, Airedales, Bulldogs, | CIGARETTE habit positively cured or Rabbits, Pigeons, Canaries, Parrots. ( ata- | money back. Scientific method—no_ drug log breeders Exchange, Minneapolis, State number of cigarettes used daily, en- Minn, | closing one dollar. Address The Antitine | System, 503 Bensen Street, Camden, N. J BE Wise! Be Cheerful! Be Prosperous! BELGIAN HARES, GUINEA PIGS, ETC. New way plan brings wonderful result | Valuable pointers and your personality re- vealed for 10c and birthdate. Thomsor BELGIAN Hares A very interesting and Heywood, Dept. 985, Chronicle Bldg., San instructive book on raising Belgian Hares Francisco, Calif. and other rabbits. It tells how to select YOUR Horoscope covering full year for the ok. how to make the hutches nd | 35e. Includes pong orton valua — 10W, when = what to feed them, ble daily guide, large pictorial chart and 10w to pre pare for the young, weaning, mar- special forecasts for each month. Scientific, keting, killing, their ailments and every- complete. Try it! Money back if dissatis- thing the beginner should know. Price 25c; fied. Give birthdate. Address, H. Daniels, — _—— Rabbit Culture, Fredericks- Flatbush Sta., Box 32, Brooklyn, N. Y ‘ ~ ne. = YOUR Horoscope—Life revelation show TT Ff . tet : in our character, talents, suitable occu patABBIT Folks. Write for big spring an 6 Glas oa aaa cone yargain list and literature All breeds. : . . ell Company Grandview Rabbit Farm, 3114 Hamilton, | birth date, 10c. The Astrolite Company, Fl Paso, Tex. Sharpsburg, _ Pa.

BREED Squabs Melrose Highlands, 77, TOBACCO Kills Manly Vigor—Quit easily. Cigarettes, chewing, smoking, snuff, con- quered or no charge. Small sum if satis-

Book free. E Massachusetts. Rice,

try or rabbits; Mo. RAISE guinea pigs. easy to raise; quired. We guarantee market. and booklet how to raise free. tributing Co., 3102 Grand Ave., factory. Stops craving; harmless. Full treat- ment on trial, Perkins Co., 34A, Hastings, Nebr. FREE—Stop using tobacco. We will give free information how to conquer habit easily and permapently. Results guaranteed. Anti- Tobacco League, Bex K, Omaha, Nebr. Pay better than poul- little space re- Particulars Cavies Dis- Kansas City,

TOBACCO or Snuff Habit cured or ne pa; $1.00 if cured Remedy sent on trial) s perba Co., TP., Baltimore, Md.

MISCELLANEOUS

PORTABLE outdoors. Playhouse. Thousands indoor Plans Uv se buildin ig

instructions 25¢c coin Kubler, Cliff Ave., Springfield, L. L, 3 MYSTERIOUS Mathematical Cc Sample pack 30 Dollar’s worth fun ler Sales Company, Box 228, Lexington, |

will find

ART Metal Workers—You book “‘Metal Work and Etching’ a plete manual on making book end sets, pad corners, paper knives, letter ers, stationery racks, rocking blotter calendars, arts and crafts jewelry, et pp. illus Price 50 cents postpaid P lar Mechanics Book Dept., 6 } Mi Ave., Chicago. GOOD prices paid for butterflies, i: See Sinclair's Display Advertisement, 27. LOCKSMITHS: Send $1.00 for valu chart for cutting tumbler padlock Globe System, 278 Washington St., New N. . LOCKSMITHING from A Z tricks of the locksmith trade, $1" 50—n back if dissatisfied H. Routson, Andover St., Oakland, Cal CUTS anybody can make.

Simple, cheary

process. Specimens, particulars 6tamp, Day, Windfall. Ind. SAVE incorporating expenses and ex profit taxes and avoid personal liability organizing your company on the Comn Law Pian under a Declaration of Tru Anyone, anywhere, can fill in Demaree Standard Forms, issue shares and beg doing business same day. Pamphlet bh

free. C. 8S. Demaree, Legal Blank Print 613 Walnut, Kansas City, Mo, ARTIFICIAL Eyes. $3. Booklet free. Dx ver Optic. 559 Barclay, Denver, Colo.

pounds; air, darkened with a stoop. game was up a There is a big fession. expanded c: Common scho« YNVICT 6138, escaped from the Charles C Hair, Easy enough to identify him from his photograph and this description, = may say—but, i Yet he was captured and identified so positively that he knew the A Finger Print Expert made this identification and secured the reward MORE TRAINED EXPERTS NEEDED NOW! State, ynstantly $3000 to $10,000 yearly LEARN AT HOME IN SPARE TIME quirements. Many of the country’s greatest experts I arned their profession in this great s« hool. A few hours’ spare time a week soon fits you for a fine position as a Finger

wy Height, Eyes, pang Penitentiary; Name, ondray; Age, 37; t. 8 in.; Weight, 141 light brown; Condray took the name of Brown”, dyed his his skin, grew a mustache, put on weight and walked nd returned to the penitentiary without extradition chance for you in this uncrowded, fascinating pro- City, and Private Bureaus being established and Trained men in great demand. Many earn 1 education, ex yn sense and ambitior , the only re-

Dept. A135, Gentlemen: gation in Secret Serv 4ddress... Present Occu patton UNIVERSITY OF APPLIED SCIENCE ‘, FREE! 1920 Sunnyside Avenue, Without anv obli- N whatever new, fully illustr: sted FREI Finger Prints and you sional Finger Print t Outfit. wy Print Expert. J for a limited time. A professional Finger Print Outfit—a course in Secret Ser- vice Intelligence Also a complete book on Finger Prints sent at once you will mail this coupon. Write today. ,. UNIVERSITY OF ‘A APPLIED SCIENCE % 1920 Sunnyside Ave. & Dept. A135 ‘.. CHICAGO, ILL. Chicago, Hil. your * Book on y if rofa FREI re (OG igence and the Fr ree P fee . send me r<

ive ‘

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ree POPULAR MECHANICS ADVERTISING SECTION 51 A Better Job Now! Why take small pay from uncertain jobs? Why be buffeted around from this to that, and not know whether you are going to have a job tomorrow or not? You can change all that. Learn a trade. Know autos—how to repair them and take advantage of the countless opportunities to make big money. Pave the way fora business of your own—a business that can make you independent for life. You ean do it with a few weeks’ train- ing at the Michigan State Auto School—the great auto-trade school in the heart of the industry. Be a Trained Man—Successful! Fellows just like you step out and make great successes. Trained men wanted all the time—everywhere! More than 10,500,000 autos, trucks and tractors in use. All need service and repairing. 50 million tires, millions of batteries to be kept in commission. More men needed for good jobs. More garages—more electric service stations—more tire-repair shops—welding shops —battery stations needed. This means amazing opportunities for the men DETROIT who start now. Fit yourself to win a good job, or to start a business . THE HEART OF THE AUTOINDUSTRY} | vour Own. Very small capital is nee a d. You are right on the threshold « big money if you decide now to make this your business. Come to the Auto Senter Learn Autos in a Few Weeks by Factory -Endorsed Methods Come to Detroit Here is where autos are made. Come to the Mich- igan State Auto School where you get first-hand experience and knowledge Great auto factories endorse and recommend M.S. A. 8. training. The Cadillac Motor Ce. savs: ‘We believe vou have the best and most com- plete school of its kind The Hudson Motor Co. says: ‘“The best equipp “d and most efficient school in America.’ You can learn the business thoroughly on latest equipment. You visit the great Detroit auto- plants. Get first-hand knowledge and a quality -training that means certain success, if you do your part Get AIIF —_— a CoupontT Toda os Decide now to gr ep this op; OF accessomy Pacromies “© GENTE FacToRies inclined—there are big-money j i bus ssof opportunities wait f Classes always oper Your er ment includes I fe-Memb« rsh with pn ege t me back at any time to brush up on thelatest equipment, an d get new r making idea Investigate Let us sl ou what we can do f vo Mail the ce big illustrated catalog Colored Otadents Not Solicit ed MICHIGAN STATE AUTOMOBILE SCHOOL A. G. ZELLER, President 306 Auto Bidg. 3729 Woodward Ave. DETROIT, eg H Mail a To Da ~ aeeenead STATE AUTO SCHOOL 306 Auto Bidg., Detroit, Mich. € Gentlemer Send FREE ar dy without obligation i] ‘ a your illustrated catalog, and Aut = 1 News, giving complete information and showing portunities t B ana advantages of a Factory I ndorsec a Di troit-Tra t ing to make the most money | ’ : Nat j Stree I ) ] he factory idersed School @ 4

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ree) 4 : r “I Knew You’d Make Good” o | ALWAYS felt you had it in you to get ahead. But for a time I was afraid your natural ability would be wasted because you had never trained yourself to do any one thing well. Yes, I was afraid you would always be ‘a jack of all trades and master of none.’ “But the minute you decided to study in your spare time I knew you’d make good. You seemed more ambitious—more cheerful—more confident of the future. And I knew that your employers couldn't help but notice the differ- ence in your work. “Think what this last promotion means! More money—more comforts—more of every- thing worth while. Tom, those hours you spent on that I. C. S. course were the best investment you ever made.” OW about you? Are you always going to work for a small salary? Are you going to waste your natural ability all your life? Or are you going to get ahead in a big way? It all depends on what you do with your spare time. Opportunity _knocks—this time in the form of that familiar I. C. S. coupon. It may seem like a little thing, but it has been the means of bringing better jobs and bigger salaries to thousands of men, Mark and mail it today and without obligation or a penny of cost, learn what the I. C. S. can do for you. .— — om oe — — TEAR OUT HERE @ ee em ee INTERNATIONAL CORRESPONDENCE SCHOOLS BOX 5640-C SCRANTON, PA. Without cost or obligation, please explain how I can qualify for the position, or in the subject before which I have marked an X: ELEC. ENGINEER BUSINESS MANAGEM’T Electric Lighting & Railways SALESMANSHIP _) Electric Wiring |} ADVERTISING i} Telegraph Engineer \} Show Card & Sign Ptg. _} Telephone Work () Railroad Positions 5 MECHANIC AL ENGINEER () ILLUSTRATING ij Mechanical Draftsman L}) Cartooning } Machine Shop Practice _) Private Secretary ‘Toolmaker (] Business Correspondent Gas E ‘~_ Goering |} BOOKKEEPER CIVIL ENGINE () Stenographer & Typist ] Surveying and Map cate ng Cl Certified Public Accountant [}] MINE FOREMAN or ENG’R () TRAFFIC MANAGER 5 STATICNARY ENGINEER [}Cost Accountant [} Marine Engineer (_}GOOD ENGLISH ) ARCH |] Common eee Subjects |} Contractor and Builder [) CIVIL SERVICE }] Architectural Draftsman Railway Mail Clerk -} Concrete Builder [| AUTOMOBILES } Structural Engineer [ } Mathematics ‘] PLUMBING & HEATING C) Navigation Sheet Metal Worker } Textile Overseer or Supt. [} CHEMIST a Pharmacy AGRICULTURE Poultry Raising French Airplane Engines (J Spanish WIRELESS U Banking 12) "! ) Ww Street 2-\-22 ii citisussnssinencnsenncemaceieissnasaintduidemeneeseis State Occupation . Persons residing in Canada should send this coupon to the Interna- tional Correspondence Schoola Canodian, Limited, Montreal, Canada. POPULAR MECHANICS ADVERTISING SECTION | New Simplified Method of Learning Drawing Amazing shortcut method now teaches you Illustratin; Cartooning, and De signing in half usual time. You lear at home in spare time, yet your work receives the pe: sonal criticism of one of America’s foremost Artists. N matter what your previous experience or education h been, this method qualifies you for the fascinating, hig! salaried profession—Commercia! Art. FREE BOOK Write today for our handsomely illustrated Free Booklet which tells you how at the cost of but a few cents a day you can learn to draw pictures that bring you from $5 to over $500. Read about the big demand for Artists b Newspapers, Magazines, Department Stores, Advertisir Agencies, and Business Concerns—about the amazing success of our students. Special short time offer « Complete Artist’s Outfit Free to new students. Writ for Free Booklet and details of this offer. Mail car today. Address Washington School of Art, Inc. 1849 Marden Bidg., Washington, D. C. CRYSTAL RADIO SET, $4.75 Complete in Cabinet as shown. Head Telephone and Antenna, $5.00 extra Satisfaction guaranteed or Money Refunded 2°%E)3] CORONA RADIO CORPORATION 265 Canal Street, New York “HOW | BEAT THE GAME” The Inspiring Story of how one poorly paid garag mechanic won success, his own business and a bis income, Tells how you can increase your salary fron 100 to 500%. Send for it today FREE. Ambu Engineering Institute Dept. 16-A 2632 Prairie Ave., Chicago, Ill. TWO GREAT FUN MAKERS 4% The dog head is made of metal, with rubber }> bulb.When pon squeeze bulb the dog barks and it’s at can tell the difference from ve real thing. The ca! cat is yb + the pape way . | only the soun oe duced by a bellows within sack cat’ smneonw will fool any eat or your friends. Both are smal! enough to be concegled +n the pocket. da of these peoge bare been sold in Chicago Postpaid 5 Cents THE ruse 60, Det 3. 3137 MONROE ST. CH st. CHICAGO, aL. Using our New Method r tents Mechanical Device n Have a business of your own from $2,000 to $6,000 a year lett ing store windows, show cards, barns, roofs, walls, fences, and signe of all k Studente can have establiehed business ‘doing finest of work in thirty daye. Yee you etep by step. Absolute satisfaction guaranteed. Write today. Details free AMERICAN SCHOOL OF LETTERING Dept. M Omaha, Nebras>

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= — wr, ng POPULAR MECHANICS ADVERTISING SECTION YOUR CHOICE FREE $ Violin, Mandolin, Guitar, Ukulele, Hawaiian Guitar, Banjo or Banjo Mandolin, Tenor Banjo or Cornet, Banjo Ukulele, Actually given away, absolutely free, to first pupils in each locality. Last year we gave away thousands of high-grade musical instruments on this sensational offer, now repeated for YOUR benefit, We have the most wonderful new system of teaching NOTE music by mail. Take your choice of any of these magnificent instruments absolutely free and learn to play by this easy to learn method. Can have you playing stand ard note music in 4 lessons A very small charge for lessons—just a few cents a week— your only expense. Your success guaranteed. Pay nothing if you fail to learn; you take no risk. Complete outfit free with every instru- ment. Don't wait a minute, but mail the cou- pon NOW. To Advertise Our Copyrighted Course Our plan is, $2.00 monthly for lessor charge for instrument Ukulele and banjo ukulele given free with 20 lessons at 5 a lesson. Tenor banjo, banjo and Hawaiian Gui- tar given free with 32 lessons at 5S0c a lesson Violin, mandolin, guitar and banjo mandoli given free with 56 lessons, 43%c a lesson r net free with 56 lessons at 3c a lesson. Les are mailed one each weel Fill out the and enclose $2.00 and you will get an ment you will be proud to own. At end of week if you are not delighted with instrumen and lessons, send outfit back and w vill fund your money. Do not delay, but mail the coupon today fore it is too late Be sur to state you want a ree Violin, Mandolin Ukulele, Hawaiian Mandolin, Tenor Ban antee any one of thes worth $20 or more, FREE INSTRUMENT COUPON Slingerland’s Correspondence School of Music, Inc., 1815 Orchard street, Chicago, Llinois Please send me one. ‘ err (Name instrumen I am nelosing $2.00 r first month's ons, but if I at not " fiec t end of eek’s trial vi l t rn yputhit ind $2.00 is to be re d me or, T will nonthly t L le t paid for - hen fu ! on with order. o oo

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on ~ POPULAR MECHANICS ADVERTISING SECTION Ree amwe, Health! Energy! Deformities | of the Back Greatly benefited or entirely eured by the Philo Burt Method. ! : IC The 45,000 cases success- tren t . a fully treated in our experience » Mt TT of over 20 years is absolute NG oe proof of this statement. At last there is a quick and inexper sive NCU No matter how serious your deform- way to physical power—glowing health— pulsing vitality. Electricity in its most scientific form for the human system! A Violet Ray of tremendous curative nature. Not a Vibrator—not a massaging device. A penetrating RAY of ENERGY that heals and invigorates. Endorsed by every doctor, physical culture and beauty expert. & U ity, no matter what treatments you a have tried, think of the thousands of sufferers this method has made well and happy. We will prove the value of the Philo Burt Method in your own case. The Philo Burt Appliance on 30 Days’ Trial Since you run no risk there is no reason why you should not accept our offer at once. The photographs here show how light, cool, elastic and easily adjustable the Philo Burt Appliance is—how different from the old torturing plaster, leather or steel jackets. To weakened or deformed spines it brings almost immediate relief even in the most sertous cases. You owe it to yourself to investigate it thoroughly. The price is within reach of all. Send for our Free Book today and describe the nature and condition of your trouble as fully as possible so we can give you definite information. PHILO BURT CO. 53-17 Odd Fellows Bidg.. Jamestown, N. Y. TOBACCO USER Can you quit tobacco? If not, do you know why? Do you know its effect on mental and physical efficiency? Thes« and other questions answered in booklet written by on who has treated thousands for the tobacco habit. Fre« for the asking. Write DR. T. H. TRINWITH, Black Bidg., LOS ANGELES, CALIF. NO JOKE TO BE DEAF —kvery Deaf Person Knows That [ mo myself hear, after being deaf for 25 year with these Artificial Ear Drums I wear them day and night. They are perfectly comfortable. No one ‘sees them. Write me and I will - 7 tell you a true story, how I got deaf and how I make you hear. Address odiented Ear Drum 8, 1906 GEO. P. WAY, Artificial Ear Dram ( Co. (Ine.) 80 Adelaide St., Detroit, Mich, A remarkable book on health and beauty via -Rex Violet Rays Sent to you FREE We have just published a remarkable book for free distribution. This book ex- plains in detail the mani- fold uses of Violet Rays in treating almost every known human ailment. This book also contains charts and diagrams of the nervous system, and organic locations, and fully describes just how the Violet Ray works “ ad its many seeming miracles, writ- ten in a simple style—devoid of all technical language. 10-day free trial will prove all we claim Use Violet Ly aye is the privacy of your home. Day by 9 , day you will see the difference in your physical fitness— the condition of your sinews and muscles. WE WANT on t ear YOU TO BENEFIT by this great modern invention and i offer you our book on perfect a russ health and a ten day trial of | the Vi-Rex machine FREE. Brooks’ Appliance, the Write for the book and det ails modern scientific invention, the | of the free trial offer TODAY. wonderful new discovery * that relieves rupture, will be sent on Vi-Rex Electric Co. — 4 No obnoxious springs or eee Dept. 26, 326 W. Madison St. Brooks’ Rupture Appliance CHICAGO Has automatic Air Cushions. Binds and draws the broken aoe _» y~ as you would a broken limb. No salves. No lies. Durable, cheap. Sent on trial to prove it. Protected by U. S. patents. ’ Catalog and measure blanks mailed free. Send mame and address today BROOKS APPLIANCE CO., ‘i26c State St., Marshall, Mich.

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POPULAR MECHANICS ADVERTISING SECTION 55 CONQUER Your Weaknesses Master yourself—correct your physical @efects— banish the ailments that make your life an existence of misery and regret throw off the shackles of Catarrh, Constipa- tion, Indigestion, Dyspepsia, Bad Blood, Rupture, Rheumatism, Weak Heart, Vital Depletion, Weak Lungs, Anemia, Nervousness, Poor Memory, Fear, Bad Habits, etc., and the numerous other results of neglecting your body and violating natural law (see Consultation Coupon). Show them that you can and will be a healthy. vigorous man with a real man's ambition, spirit and endurance—the powerful man that Creation and Civilization demand you to become Get Rid of Your Handicaps Build up your body and brain and get the joy out of life You can't be successful, popular or wanted in the home, in business, in society—anywhere, without the health, and strength and vigor of a real man People you come in contact with instinctively analyze your physical and mental condition If you are not vigorous and magnetic—if you lack power, endurance and vitality, everybody will know it. You know how these things affect you when you see them in other veople You know that nobody has the least bit of respect for a weakling. They can't have confidence in a man that may end up any moment on the scrap heap of worn out and useless humanity You wouldn't have much respect for a business associate who was groggy with Constipation, yellow with Biliousness, weak, anemic and handicapped with Rupture, Flat Feet, Weak Back or some other physical defect—you wouldn't have confidence in a man whose bad living habits showed clearly in his face and bleary eyes you wouldn't want to do business with or associate with an irritable, grouchy person with frazzled nerves and a wretched, unreasonable temper. Now look at yourself with the same eyes. Are you guilty of these physical and mental defects? Do you not recognize the many faults and weak- nesses that have often robbed you of success in business, preference in society and cheated you out of the priceless benefits of real friendship and companionship? Judge yourself without favor—then get busy to root out the elements of failure and make yourself a teal man, Win Back Your Vigor and Vitality Let me he!p you as I have thousands of others. Accept my hand in friendship as you would a brother's and I will show you Nature’s Way back to Health and Happiness I'll teach you how to get rid of the ailments and physical defects that are ruining your body and brain. I'll build you up externally and internally, by the same scientific methods that won for me the World's award as the finest specimen of physical and health attainment I have dedicated my life to the task of rescuing sick, ailing human- ity from the bog of Weakness and Poor Health and thousands of my pupils gladly testify to the wonderful effectiveness of my methods You can apply these scientific principles with the same satisfactory and permanent results I want to hel» you—I can rebuild and restore you with STRONGFORTISM The Modern Science of Health Promotion The Principles of Strongfortism are based on my discovery—that internal mus- cular harmony and strength is the Key to lasting, abundant Health and Vitality The Heart, Lungs, Stomach, Bowels, and other vital organs function thru virtue of the contracting power of the muscles contained in their structures Circulation, Diges- tion, Assimilation and Flimination are largely the result of internal muscular action. The Strongfort Methods go to the very cause of all ailments and weaknesses and by scientifically strengthening and developing the important internal muscles, provide 100% results when all other methods disappoint LIONEL STRONGFORT Once you accept Strongfortism, you enter a new life’ The results are immediate Dr. Sargent, of Harvard, declared and positively thrilling. You feel the rich blood racing thru your body—vyou feel new jj] that “Strongfort is unquestion- gtrength and power developing in every organ and structure—you acquire new poise ably the finest specimen of phys: and a magnetic personality You can't fail with Strongfortism I guarantee it ical development ever seen.”’ > My Methods Are Beyond Physical FREE CONSULTATION COUPON Mr. Lionel Strongfort, Dept. 848, Newark. N. J.— Culture Please send me your book, “PR« IMOTION AND CON- Do not confuse the Science of Strongfortism with gym- SERVATION OF HEALT H, : STRENGTH AND nastie or ordinary physica! culture Courses. I am not merely MENTAL ENERGY,” for postage of which I enclose a | a developer of bulring muscles—I am far more than that for I iNe piece (one dime). I have marked (X) before the sub have devised a real science thru which weak, ailing men are ject -- ~~ ae — interested. Also on those JI may write restored to the Glory of Perfect Health—to the Summit on extra line below of Health, Happiness and Success, without the use of dope Colds Increased coer Memory and drugs, lifting and stretching machines, unnatural deep- Catarrh a — + p+ oma yg breathing, starvation, diets, nerve-racking routines or other 4sthma imples allin air foolish fads and fancies. From start to finish Strongfortism Hay Fever Blackheads Weak Eyes is practical, sensible and scientific, and planned to suit the Obesity Insomnia Gastritis pupil's individual needs Headache Short Wind Heart Weakness a . pnmess A we ee oper ivoutetion upture tomac kin Disorders Get My Book It s Free Lumbago Disorders Despondency The truth about the scientific application ofjnatural law is Neuritis Constipation Round Shoulders contained in my wonderfully interesting book, **Preomeotion Neuralgia Biliousness Lung Troubles and Conservation of Health, Strength and Mental Flat Chest Torpid Liver Steop Shoulders Energy.’’ It will tell you frankly and plainly how you can Deformity Indigestion Muscular banish your ailments and build up 100 per cent Health, Strength Describe) Nervousness Development and Vitality. It's absolutely free. Mark the subjects on the Neurasthenia Weaknesses Great Strength free consultation coupon on which you want special confiden- Diabetes (Specify) tial information, write additional subjects on extra line one : send with 10c to help pay postage, ete. I'll do the rest. Send ¢ : y = ai for my free book Right Now TODAY. H Mention other ailments here § Name , LIONEL STRONGFORT ; «« Occupation Physical and Health Specialist Founded 1895 y sureet Dept. 848 NEWARK, N, J. § City State

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Improve Your Figure Control Your Nerves—Enjoy Life Be Free from Nagging Pains and Ailments How? Correct your posture and strengthen your muscles and nerves by using for a little while this gentle, easy, natural sup- port. Nearly 200,000 have done it with the wonderful Natural Body Brace Overcomes weakness and organic ailments of women and men. Brings restful relief, comfort, ability to do things, health and strength. Develops Erect, Graceful Figure Does away with the strain and pain of standing and walking; replaces and sup- ports misplaeed internal organs; re- duces enlarged abdomen; straightens and strengthens the back; corrects stooping shoulders; develops. lungs, chest and bust; relieves backache, cur- vatures, hervousness, ruptures, consti- pation, after effects of Flu. Comfort- able—easy to wear. KEEP YOURSELF FIT EVERY MAN with heavy abdomen, rupture, stooping shoulders, backache, shattered nerves, or other spinal trouble, should wear my brace. Wear it 30 Days Free at Our Expense Write me in confidence today, stating your condition and desires. I will answer quickly and send illustrated booklet, measurement blank and our very liberal proposition. HOWARD C. RASH, Pres. Natural Body Brace Co. 223 Rash Building, Salina, Kansas I Make Strong Men That is my business. I make no otherclaims. But what I promise, I fulfill. I willincrease your arm one full inch in 30 days and your chest in proportion In three months I will make you a finished strong man. Are you interested? Read my book “Physical Perfec- tion.’ It tells you how. All I ask is 10 cents to cover postage and wra pping. Don’t put it off. Send to- day. Arthur L. Hyson 100 Langdon Bidg. New York City skin can be quickly cleared of Pimples, Blackheads, Acne Eruptions on the face or body, Enlarged Pores, Oily or Shiny Skin. $1,000.00 Cold Cash says | can clear your skin of the above blemishes. WRITE TODAY for my FREE Booklet—*‘A Clear-Tone Skin” —telling how I cured myself after being afflicted for fifteen years. E.S.GIVENS, 129 Chemical Bidg., Kansas City, Mo. 56 POPULAR MECHANICS ADVERTISING SECTION STOP USING A TRUSS | Do Away With Steel And Rubber Bands Inner surface is made adhesive to se- cure the AO- PAD firmly to the body, keeping the PLAPAO continual- ly applied and the Ri m._ slipping. o straps, bucklesor springs attached. Soft as velvet—easy toapply. FREE to 5,000 Truss Sufferers ‘lo the extent of 5,000 sufferers who may apply I will LUTELY FREE, a suffic’ at quantity of the Pla) itively convince them that this is the only logical, common- sense way of treating rupture. Plapao is a highly ‘astringent medication placed within the Plapao-Pad and be mag Gpoetnes through the skin, creates a wonderful feeling of relief and at same time tends to strengthen the weakened muscles and thus permanently close the rupture opening. The process of recovery is natural, so you'll have no use for a truss—you can throw it away forever! Old and young have testified under oath that the Plapao-Pads cured their rupture—many of them long-standing, aggravated cases—without delay from work Patent allowed in U. S. and foreign countries. Awarded Gold Medal r Rome and Grand Prix at Paris. Send N 0 Money ; —for a sufficient quantity of the Plapao is sent without charge to enable you to | give ita thorough test; : on-Slip- ping, yet Non- "Rigid Pad andWhst is Within It That “yo pos- ou pay nothing for this-trial now or ever. Write for it and full information today. dress 8t. Louis, Mo. Plapao Laboratories, Block 1427 Buchstein’s Fibre Limb is soothing to your stump—strong, co neat, light. y paymente —— for all Aeleamitios . BUCHSTEIN CO. 113't Gih St. S., MINNEAPOLIS, MINS Deafness For over 25 years Perfect Hearing has %& been restored in nearly every condi- tion of deafness by the use of our 29m“ Little Wireless Phones for the Ears.’ The Wilson Common-Sense Ear Drums effectively replace what is lacking or defective in the natural ear drums; require no medicine; are simple little devices easily fitted into the ears, where they are invisible. Soft, safe and comfortable to wear. Writ rite today for FREE book, explaining the causes of DEAFNESS, and giving ——— of hundreds whose hearing has been happily — LSON EAR DRUM CO rated 829 Inter-Southern Bldg. COrpul isv ILLE, KY. s NO MORE BALD HEAD HEN our VACUUM CAI is used a few minuter daily. We accept no pa antil you have tried the Cs 60 daye and are satisfied. The Vacuum Cap is an appliance that draws the blood to the Hair Roots and starte a new health crop of hair. It stops Dandruff, stops the hair from falling out Bought py Doctors and men who know that it is the on! reasonable HAIR GROWER known to ecience. No Dr es rite for application blank, testimonials. an booklet on “ HAIR,” sent sealed in plain envelope, FRF! THE MODERN VACUUM CAP CO. Y 559 BARCLAY, DENVER, COLO.

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POPULAR MECHANICS ADVERTISING SECTION 57

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 YOUR system. For you know that nicotine, as absorbed into the system through smoking and chew- ing tobacco, is a slow working poison. Slow, yes—but sure. Tobacco is lowering your efficiency. It When your hands begin to tremble— , ; and your appetite begins to fail— slows aman down. Makes it harder for you and your heart seems to “‘skip a beat” now and then— Tobacco Is Hurting You te ~ poe geet pe mind ry 0 . > > Free Proof = Nene pan a ——— from the tobacco habitor my money will be refunded | they have been absolutely freed from the tobacco habit by this simple home treatment. You could not ask for stronger proof that Tobacco edeemer will free you from the habit than the evidence we will gladly . send on request. Just mail the coupon—or a postal will do. NEWELL PHARMACAL CO. Dept. 300 St. Louis, Mo. Name Street and No. ............

L EE ee ee,

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POPULAR $95 AnHour! “Every hour I spent on my I. C. S. Course has been worth $95 to me! My position, my $5,000 a year income, my home, my family’s happiness—I owe it all to my spare time training with the International Correspondence Schools!” Every mail brings letters from some of the two million I. C. S. students telling of promo- tions or increases in salary as the rewards of spare time study. What are you doing with the hours after sup- per? Can you afford to let them slip by unim- proved when you can easily make them mean so much? One hour a day spent with the I. C. S. will prepare you for the position you want in the work you like best. Yes, it will! Put it up to us to prove it. Mark and mail this coupon now! oo oe oe me we — TEAR OUT HERE — oe oe oe oe ee INTERNATIONAL CORRESPONDENCE SCHOOLS BOX 5642-C SCRANTON, PA. Without cost or obligation, please explain how I can qualify for the position, or in the subject before which I have marked an [] ELEC. ENGINEER [} BUSINESS MANAGEM’T Electric Lighting & Railways }) SALESMANSHIP Electric Wiring J ADVERTISING Telegraph Engineer J Show Card & Sign Ptg. Telephone Work Lj Railroad Positions MECHANICAL ENGINEER [] ILLUSTRATING Mechanical Draftsman } Cartooning Machine Shop Practice Private Secretary Toolmaker [} Business Correspondent Gas Engine Operating BOOKKEEPER CIVIL ENGINEER Stenographer & Typist Surveying and Mapping Certified Public Accountant MINE FOREMAN or ENG’R _JTRAFFIC MANAGER STATIONARY ENGINEER }Cost Accountant Marine Engineer GOOD ENGLISH ARCHITECT Common School Subjects Contractor and Builder sE - CIVIL SERVICE Architectural Draftsman Railway Mail Clerk Concrete Builder é }] AUTOMOBILES Structural Engineer Mathematics PLUMBING & HEATING Navigation Sheet Metal Worker | omy Agr Supt. & pet bei CO h extile Overseer or Sup *oultry Raising Frenc CHEMIST ; T }Airplane Engines) Spanish () Pharmacy LJ WIRELESS Lj Banking COLI f J LOO) mono mi 100 ; | Name... Btreet and No. City... Occupation Persona residing in © tional Correspondence anada should se Schools Ca Interna- Canada, d this coupon to ihe nadian, Limited, Montrea’, MECHANICS ADVERTISING SECTION has enabled John G. Anderson, Aurora, IIl., to keep on the payroll since his right arm was amputated some yearsago. The reproduction (from an actual photo- graph) shows Mr. Anderson at work on an intricate machine using his Carnes Artificial Arm. INCONSPICUOUS - SERVICEABLE The Best Substitute for the Natural Arm. To see himon the street you would not realize that his right arm was artificial. Wearersof this wonderfularm find that it practically takes the place of the natural arm. With it you can dress yourself, use knife and fork, carry grips, write, pick up large and small objects—in ae do practically eve rything that was possible before. Even gh the amputation be at the shoulder, the CARNES ARTIFIC TAL ARM bends at the elbow and wrist, and the fingers open and close as desired. WONDERFUL BOOK SENT FREE 2vcry, soles? man or woman should write to- day forthe wonderful illustrated 190 page book showing with actual! wer what can be done with this invention. Write today to NES ARTIFICIAL LIMB CO. 208 oe BUILDING KANSAS CITY, MO. $150 $400, Month YOU Ass an Expert Auto Mechanic EASY TO LEARN HOW In 6 to 8 Weeks’ Time Come down to Washington—th Nation's Capital. Drop in at th American Motor Schools. Go thru our big new $250,000 building Watch the y men who are learning, by act practice, every detail of construction and repair, aut electricity, battery building vulcanizing, tire repairing, welding. Lots of these fellow will soon own their own garay $5,000 to $10,000 a year. Many aut ind be them will soon be holding down good jobs paying fr $150 to $400 a month You too can get your start tows ards success in the making from Aut business with the help of the American Motor Schools FREE CATALOGUE Fillin and send the following coupon and we will send y« free our illustrated catalogue telling about your opportu) it) the auto business and how we will help you to make good. 1} acting promptly you can save $50. Mail the coupon NOW. American Motor Schools, Inc., 16th & You Sts. Washington, D. C. c a the Cc. Se eel The American mater Schools, 16th & You Sts., N. Dept. 257, Washington, D.C. Please send me, free of charge, illustrated catalogut information regarding your Auto Mechani s Course Dept. 257 Pp Inc., Name Address City . tate pT,

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nn 1 ne noe POPULAR MECHANICS ADVERTISING SECTION 59 ‘ SUCCESS “Since I've been taking your lessons I've made over $200 with my violin. Your lessons surely are fine."’—Melvin Freeland, Macopin, N. J. “When I started with you I knew nothing about the Cornet or music, but now I can play almost any piece of music.” Kasson Swan, Denmark, Col Co., Nova Scotia. “IT want to extend the hearti- est approval of your Piano Course. It has done more for me than years of other les- sons."’—Moxie N. Lewis, 319 Jefferson, Neosho, Mo “The folks at home are de- lighted to hear me play the Organ so well. You have a wonderful system of teaching music.” M. F. Allard, Cara- a quet, N. B Piano, Organ, Violin, Cornet, Guitar, Banjo, Mandolin, WRITE! This is your opportunity. Writ: Harp, ’Cello, Trombone, Flute, Clarinet, Ukulele, Saxo- tinjare ME poms how wg been “Pl jee phone, Piccolo, Sight Singing, Harmony and Composi- name and address very plainly 0 » Hawaiian seamed Tenor Banjo, Automatic U. S. SCHOOL OF MUSIC —— —_ Fraps. 76 Brunswick Bldg., New York longer need the ability musie, no “numbers,” yet simple, play be shut out of vour life wonderful, amazingly easy for even U. S. SCHOOL OF MUSIC ‘ ; ane i “* @ mere child. 1 76 Brunswick Bidg., New York City ) ast mail coupon or pr stal to- Please send me your free book Music Lessons in Your Ow lay for our new Free Book. Amazing Offer ——————— eee ee the following course Let us tell you how you can ° We wont tom ave ONE PUPILIN |! 1 AC JICALITY AT ONCE to help wily, quie kly ’ thoroughly advertise our wonderful easy system ot ' Koos cut on Causes arn to play your favorite teaching music. FOR A LIMITED | TIME we therefore offer our marvelous iusical instrume nt by note lessons at practically no cost —charges | Name ur own home, without a teacher, a merely to abous the cost of ‘ Pleae \ ur New ove ome $ sheet music, postage, etc eginners or loth — Different A... np bp advanced pupils. Get all the proofs, | mie , — F tacts jotters from pupils. AMAZING acavens ‘ icher way—no tiresome, dr FREE OFFER and fascinating New I ise-—no inconve nie nee, no tric Book ay issued. 1 City State BIG PAYING HOTEL JOBS OPEN MS: ag" BECOME 4 LIGHTS trained men and women; we ain you by mail; get zu years’ hotel -, perience in few months; earn $3,000 to $10,000 ayeer; st fine living; MAKE MONEY CHALK TALKING. SEND $100 FOR SNAPPY k ie fascinatingly interesting; quick advancement. Sead for BOOK today! PRO naa pan. CART OONaT Bari Phen OunnAntel LEWIS HOTEL TRAINING SCHOOL, Room 329, Washington, D.C. C/ACULAR FREE. BALDA ART SERVICE, E,Q], OSHKOSH,WIS, $100 a WEEK for DRAWING How would you like to make $100 a week as a commercial artist? If you like to draw, you are indeed fortunate—well-trained artists are always at a xremium. They readily earn $75, $100, $150 a week, and even more, and beginners with practical ability soon command $50 a week. LEARN QUICKLY AT HOME IN YOUR SPARE TIME Develop your talent—put your natural ability to its best use. The Federal ‘“Master’’ Course, endorsed by high authorities, teaches you by mail in your spare time. No expe rience needed, each step Is clearly explained. You receive individual personal criticisms on all your lessons. - a be Send for “Your Future,” a aple ndid book showing work of F ederal Students, telling ( / te —_ all about this remarkable course, and pointing out opportunities that will surprise j ) . you If you are in earnest and 16 ye ars old or more, write oan for this free book, ~~ Ss A kindly stating your age 7. { _S) FEDERAL SCHOOL OF COMMERCIAL DESIGNING, 677 Federal Schools Bidg., Minneapolis, Minn. WANTED RAILWAY MAIL CLERKS $1600 to $2300 Year Franklin Institute, Dept. D176, Rochester, N. Y. / MEN - BOYS OVER 14 SHOULD 4 Sirs: Send me, without charge, (1) ne ae Railway Mail Clerk amination Questions; (2) schedule showing SEND COUPON IMMEDIATELY / sinees of ry oe U ri er —~ kA. " ceemaimanhaind ™ 4 Steady Work No Layoffs Paid Vacations , Common education sufficient . Send coupon today—SURE , Address (3) list of many Government jobs now obtainable 4 Name

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60 If you way tobe a yore fi POPULAR MECHANICS ADVERTISING SECTION Ask for a free copy of this this booklet | It is a frank, man-to-man discussion of personal develop- ment that we are glad tosend every ambitious young man. It does not paint any “blue-sky dreams”’ that you cannot realize but it tells how we are helping thousands of young men to make the most of their study hours. We will also give you the “Six Reasors’’ why you should select the United Y. M.C. A Schools t congenial or Letter-pay1 friendly counsel is free. Tear Out and Send This Slip United Y.M.C. A. Schools’ Correspondence Courses, er positions for which they afford training: Accountant » help you to qualify for greater responsibility, mors Our ng work, and larger manhood, Flectrical Engineer Advertising Man Factory Management Agricultural Courses Farm Management Architect Foreign Languages Auto Mechanic High School Subjects Banking Foremanship Better Letters Highway Engineering Bookkeeper Machine-Shop Building Construction) Practice Ste Business English Leadership Courses Structural Drafting Business Law Locomotive Operator Surveyor Business Organization Mathematical Courses Tool Designing Civil Engineer Mechanical Engineer Tractors and Farm Civil Service Plumber Machinery Concrete Engineer Poultry Husbandry Fae Management Dairy Farming Radio Operator Use of the Slide Rule Draftsman Salesman Secretarial Shorthand and Type- writing im Engineer } Radio Engineer ane Youan er-Service Electrician Railroad Engineering Mant United YM.C.A ni e + . . % | 315 Lexington Ave. choo S New York City. Without obligating me, please advise regarding the cece eres esseseees ° Ps course Age and Occupation ES Te Tee TT) COREE ee re Full Address 2-Ju Please write piai Comics, Cartvons, Commercial, News- paper and Magazine lliustrating, Pastel Crayon Portraits and Fashions Earn money become a metho d quickly develo our talent in @pare time y Mall o yee | Classes. Write for terms and list of successful students ASSOCIATED ART is 87-B Flatiron Building wy Our simple oR THIRTY-FIVE EASY LESSONS 50> IN RADIO A systematic course of element: ry principles written in a simple and concise lesson course, easily under stood. Thousands bev e taken up Radio for entertainment and ar ope ri iting thei irown amateur sets This book embodies all the principles and application of everyday radio for the home andin business. Paper cover Price postpaid 50c SHREWESBURY PUBLISHING CO. 5525 West Lake Street Chicago, II. f yEssonts irre SELL US . $ Our UUs MES You can earn money writing show cards in your own home. N« canvassing—A pleasant, profitable profession easily and qutek'! learnt by our new simple graphic block system—Artistic ab not necessary —We teach you bow, and supply you with work - Distance no object. Full particul: ars and bookiet free Wilson Methods, Lti.. Dept. M, 64 Richmond East, Toronto, Canada }- TO HIGH SCHOOL Study at home in spare w the world’s largest hn mc school. Your choice of any four of the -_ ( owing subjects Grar a Composition, nerican Literature, Er ! Literature, inst ry, Physics, G gy, tronomy, Chom TE Al @) Plane Geometry, Solid Geometry, 1 ee Write today international Corre spondence Schools, Box 5647-C, Scranton, Pa. fon remy! Geogra Zoolo Biology, LEARN AT ELECTRICITY “4éme Send for catalog which tells how Burgess Home Trair enables men and boys to get good jobs and keep the Burgess Electrical School, Dept. P-6, 744 E. 42nd St., Chicag: Big Money Made byagents sellingo wonderful Facial tend Perfumes, Toilet Articles, Spices, Extracts,etc. Free cake of soap and agents terms mailed toany address Dept. 455 LACASSIAN CU, ST. LOUIS, MO. yet. Nine separate articles in one. F-verybo- 507'T og Wonderful tn- 0 strument. Great- wt s est thing - ay dy delighted with it. Odd, curious and interesting. Lots $ of pleasure as wellas very use- ul. Itisadouble Microscope for examinisg the wonders of nature. It is also an Opera Glass, a Stereoscope, a Burning Lens, a Reading Glass, a Telescope, @ mpass, a Pocket Mirror, and a Laryngascope—for examin- ing eye, ear, nose and throat. {t is worth all the cost to locate even one painful cinder in the eye. Foids flat and {its the pock- et. Something great—you need one. Don't missit, Sent by mail, with 300 page Novelty Catalog, ONLY SOc or 3 for $1.25 JOHNSON SMITH 2 CO., Dept. 640 3224 H. Haisted St.. CHICAGO 3— be it the pronunciation of- Bolsheviki, the spelling of a puzzling word, the location of Murman Gast-/ contains an accurate, final answer Regulor and India-Paper Editions Write for specimen pages,prices, etc and FR 400,000 Words. 2700 Pages. 6000 Illustrations. G.& oc. MERRIAM CO., Springfield. Mass. EE Pocket M @Ps_ Per Popular Mechanics

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les, ree eas. 0. Oo, FPO} @e meee Beamer _ POPULAR MECHANICS Why Miss Half > the Fun in Life? BE POPULAR — Learn to dance well! Arthur Murray, America's greatest dancing teacher, has in- vented a remarkable new easy method which enables anyone to learn all the new- est dances at home—in a few hours — ai very little cost! No music or partner needed positively guaranteed! dancing by mail.” FREE DANCING LESSON — To prove you can learn easily and quickly. Arthur Murray will send you a lesson absolutely free. Also, the Secret of Leading, How to Gain Confidence and other dancing helps, in plain cover. For mailing, send 10c,. Act now and be a good dancer soon. Arthur Murray, Studio 253 100 Fifth Avenue New York HEMISTRY Success “60,000 learned =4 Good salaries await trained men. No work is . 3 more interesting—no other profession offers Sh greater opportunity for advancement. You can > learn quickly and easily at home—in an hour ~ a day of the spare time that now goes to waste. Write today for full particulars. BVA Seen New Gum Vending Machine Makes You $10 to $20 a Day Pays Rent for Store Owner Install onein your store or any iblic place and get this easy profit Requires ho attention Always works. Machine's profits y therent. Write us about re- ult penny and nickel machines. linished like new. In excellent ning order. Pay their cost in 10 days Write or wire today for full par- ticulars. 25 down payment. Balance C.O.D. Mints $30 per se—2,000 5 cent packages. Single boxes, 100 5 cent packages, $2.50. SILVER KING NOVELTY CO. 400 Williams Bldg. Indianapolis, Ind. Wrestling Book FREE me pm ex pene sapeiee. pace oe Dome Oy ——— ae m: onderfu gocone proper orld’s champions Farmer Burns and Frank Gotch. ae book tella you how. Secret polde FAW 3, “Bon tdelay. Be strong. healthy. andle big men with ease. Write for free book, State your age. —— Al77Ramge Buildin reece Depts., factories, banks saauserieg pt finger print meshed of identificati« pad. rai ale. BE A FINGER PRINT T. air at home in spare time Witt ouT Write for ¥ * r. aidehe telling uses of finger printal and how to learn this profitab ‘le profession. POSI fi s ‘scHoaL ‘OF | FINGER PRINTS, Room 9 7003 N. Clark St., Chicago, II!. TOBACCO OR SNUFF HABIT CURED OR NO PAY $1.00 IF SUCCESSFUL No matter whether used in pipe, cigarettes, cigars. chewed, or used in the form of snuff, Superba Tobacco Remedy contains nothing in- jJurious. no dope. poisons, or habit forming drugs. ay id — Loy ea GUARANTEED. osts nothing if results are not satisfactory. WRITE FOR FULL TREATMENT TODAY. SUPERBA CO. M-i9 Baltimore, Md ADVERTISING SECTION A Bigger Job— and Yow’re the Man Are you hunting a bigger job, or does the bigger job hunt you? Why waste priceless years at routin work, when you can acquire in a comparatively few months the specialized knowledge that big firms pay big money for? Literally thousands of men have doubled and tripled th cir incomes by home study business training underthe LaSalle Problem Method. Let us show you how you can do just as well or better. The coupon wi! it ring you complet: information, toge the r with details of ourcomvenie a payment plan; also your free copy of are markabl book —"*Ten Years’ Promotion in One.” Make your start toward that bigger job today. phage ee eg tee Coupon ——" = —- el LaSalle Extension | University Dept. 664-R Chicago, Ill. Please sena me catalog and full information regarding thecourse and service I have marked with an Xbelow. Also @ copy of your book,* ‘Ten Years’ Promotion in One,’ all without obligationtome. j O secre, Training for Official, Managerial Sales, and Executive positions. o Salesmanship — Principles and Practice: | Training for Sales and Advertising Executives, Solicitors, Sales Promotion Managers, Salesmen, | Manufacturers’ Agents and all those engaged in retail, wholesale or specialty selling. Oo Higher Accountancy: Training for positions | Auditor, Comptroller, Certified Public Ac countant, Cost Accountant, etc. | | Oo Traffic Management— Foreign and Domestic: Training for positions as Railroad and Industrial Traffic Manager, etc | oO Railway Accounti and Station Manage- ment: Training for iway Auditors, Comp- trollers, Accountants, Clerks, Station Agents, | Members of Railway and Public Utilities Com- missions, etc | Industrial Management Efficiency: For Exec- utives, Managers, Office and Shop Employes and those desiring practical training in industrial | management principles and practice. Modern Business Correspondence and Prac- | tice: Training for Sales and Collection Corre- spondents; Sales Promotion Managers; Credit and Office Managers; Correspondence Super- | visors, Secretaries, etc. Banking and Finance: Training for executive positions in Banks and Financia! Institutions. Modern Foremanship and Production Meth- ods: Training in the direction and handling of industrial forces — for Executives, Managers Superintendents, Contractors, Foremen, Sub- foremen, etc oO Personnel and Employment Management: | Training for Employers, Employment Managers, Executives, Industrial Engineers. | Oo 0 O00 Law: Training for Bar: []Commercial Law. LL. B. Degree. (J Effective Speaking. | CJExpert Bookkeeping. Lic. P. A. Coaching. [] Business English. (J Commercial Spanish [ Name Please Mention Popular Mechanics

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62 POPULAR MECHANICS ADVERTISING SECTION HOMEMADE FR A [)]() arrararus is the title of a new book soon to be published by Popular Mechanics Magazine Popular Mechanics Magazine is famous for its clear constructional articles and the publisher takes pride in being able to present a Radio book of the very highest standard, so clear that anyone, no matter how slight his knowledge of radio, can, by following the simple directions, build a first-class outfit. This book will cover thoroughly the construction of radio apparatus from the simplest crystal receiver up to the most advanced radio- telephone transmitter, completely illustrated by drawings and photos, and, to the last detail, “Written So You Can Understand It’ The theory of radio transmission and reception will be touched on very briefly, as the purpose of the book is to describe, step by step, the actual construction of the apparatus and ali auxiliaries. There will be ten complete articles on increasingly efficient sets, 5 receiving and 5 transmitting; the cost of materials for making will range from $10 to $100. The instruments described could not be purchased for several times the cost of construction. In addition, there will be a number of shorter articles, describing the making of condensers, high-speed keys, and detectors, operat- ing suggestions, symbols, code, extracts from laws governing radio, etc. About 180 Pages with over 100 Illustrations, including many Full Page Drawings. Attractive Cloth Binding. ihe

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POPULAR MECHANICS ADVERTISING SECTION

“RADIO TELEPHONY FOR AMATEURS” By STUART BALLANTINE Formerty Expert Radic Aid U. S. N. is the book that tells the how and why of radio telephony. Written so you can under- stand it fully. The biggest help to the ama- teur operator. 200 pages, freely illustrated. $1.50 net, by mail $1.65 Send for your copy DAVID McKAY COMPANY, Philadelphia

ANY BOY CAN BUILD THIS 20° CAT BOAT with our complete | Construction Set. “Ee saint We have other boats, en- zines, boilers, etc. Catalog Free The H. E. Boucher Mig. Co. 154 Lafayette St., New York

DO YOUR. own ELECTRICAL WORK AND WORK FOR OTH- ERS IN YOUR SPARE TIME Anyone with the aid of Electrical Kinks can do wiring and repairing of door bells, burglar alarms, garages, electric irons, vacuum clean- ers, washing machines, table lamps, ete., in fact most anything electrical used in the home, The book has 131 pages, 75 illustra- tions and the cost is ONLY $1.00, postpaid. Send the money today—you may need the book tomorrow. HOME BOOK CO., 388 Arcade Bidg., Cleveland, Ohio & A Method will stop |24 Send for free 200 page book. It MMEF ad manently stop stammering or a in a Se been en A natural guaranteed hool for Stammerers’ ° 2 ton Bide 71-77 Adelaide &t.. Detroit. LEARN WATCHMAKING and become independent. Good-paying positions secured. kasy to learn. Send for FREE CATALOG. ST. LOUIS WATCHMAKING SCHOOL, Dent. 5. ST. LOUIS. MO The Dying Pig | Popular Watch Charms

The most laughable

novelty yet pro- duced Made of rubber and you | have only | to blow it | up and) Very V etty little curiosities and decid- " etand| edly novel. Fitted with Magnifying the pig on his feet, when he begins to squeal Leneee th st enlarge the pictures to a very as he slowly collapses and finally lies down | surprising degree ;in fact, it seems alreee nnd dies in the most natural manner 7 incredible tuat a clear picture could be sa blow him up ae often as desired, aed possibile in such a emal!l compass, and how one h time he will go through the aame per- a and distinct they show up when jrinaace to the great amusement and de- ou look through. ‘ome in assorted ‘aht of your friends, oe Actresses, views puneen < ‘ana! Price 15 cents; 3 for 40 cente: one dosen | Lord's Prayer in type, e' $1.35, mailed postpaid. | Price 15c; 3 for aoe; ‘$1.35 doz. Johnson Smith & Co., 3224 N. Halsted Street, Dept. $40, Chicago

63

T takes but a moment to mark the career of your choice, sign your name, clip out and mail the coupon printed below. Yet that simple act has started more than two million men and women toward success. In city, town and country all over the world, men are living contented lives in happy, prosperous homes—because they clipped this coupon. In every line of business and industry, in shops, stores, offices, factories, in mines and on railroads, men are holding important posi- tions and receiving splendid salaries—be- cause they clipped this coupon. You too can have the position you want in the work you like best, a salary that will give you and your family the home, the com- forts, the little luxuries you would like them to have. No matter what your age, your occupation, your education, or your means —you can do it! All we want is a chance to prove it. That's fair, isn’t it? Then mark and mail this coupon. There’s no obligation and not a penny of cost. It’s a little thing that takes but a moment, but it is the most important thing you can do today. Do it now! _—— — = — — — TEAR OUT HERE — = — — — — — - INTERNATIONAL CORRESPONDENCE SCHOOLS

BOX 5644-C SCRANTON, PA. Without cost or obligation, please explain how I can qualify for the position, or in the subject before which I have marked an X: ELEC. ENGINEER [}] BUSINESS MANAGEM’T Electric Lighting & Railways _} SALESMANSHIP Electric Wiring -] ADVERTISING Telegraph Engineer [J Show Card & Sign Ptg. Telephone Work [) Railroad Positions MECHANICAL ENG INEER _) ILLUSTRATING Mechanical Draftsman _| Cartooning Machine Shop Practice Private Secretary | ag [} Business Correspoadent }Gas Engine Coereting J) BOOKKEEPER CIVIL ENGINEER [} Stenographer & Typist {} Surveying and Mapping [jwertitied l’ublic Accountant [}] MINE FOREMAN or ENG’ [} TRAFFIC MANAGER LJ STATION ARY ENGINEER _] Cost Accountant |} Marine Engineer [} GOOD ENGLISH L}) ARCHITECT [}Common School Subjects {j Contractor and Builder [} CIVIL SERVICE {|} Architectural Draftsman J) Railway Mail Clerk Concrete Builder |} AUTOMOBILES Structural Engineer |_| Mathematics PLUMBING & HEATING _] Navigation Sheet Metal Worker = AGRICULTURE {) Textile Overseer or Supt. Poultry Raising (2 French 7 CHEMIST Pj Airplane Engine si Spanish (J Pharmacy [J WIRELESS LJ Banking FI sacs ce cess sesso censescnengy sonntpenepebanensnanssevetizecstocceoceseesoesees Street 2-11-22 Ce ET ee aicrenrincscnnctonscastnestacepngtivitesnretinmnenne State Occupation

—) Persons residing in Canada should send this coupon to the Interna<- tional Correspondence Schoole Canadian, Limited, Montreal, Canada

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POPULAR MECHANICS ADVERTISING SECTION BASTIE SOENTNCSEEYSBULT WATCH { ; a EOIN IC Ae ene RFECTION Years ago watchmakers discovered that ol Bearing "sapphires being the hardest known materials were the best from ing parts of a watch whichto make the bearings for the revol\ For nearly thr juarters of a century Waltham has been in- venting and perfecting machines for tilding and locating these most important parts The machine illustrated is the perfected result of the ly and development related to this very important facto Nowhere else in the world can you find such a machine. Created ind built at the Waltham factory, it performs a task day after lay undreamed of, except by Waltham up-keep ost of anv watch made today This is one m dependability Colonial Series No. 1420 Waltham, Mass Raised Gold Figure Dial, Solid Gold Case Catalogue No. 116. $85.00 liamonds genius ~ason why the Waltham Wat« here in true watch value. Buy a Waltham Watch and enjoy the pride you will have in its exclusive qualities Write for a valuable booklet that is a liberal tion. Sent free upon request. The Waltham Watch Company watch duca- THE WORLD'S WATCH OVER TIME Where you see this sign they sell Waltham Watches GIFTS THAT LAST ROM the application of the first wheel to mechanics, the elimination of friction, through the development ings, was one of the greatest problems confronting man rubies and This machine locates one bearing (or jewel) with the other so accurately that friction, the greatest enemy of good time-keeping, becomes a minor consideration in Waltham Watch construction When you own a Waltham Watch, the mechanical perfection of its parts insures you accurate time and the lowest possible h leads every- of service and Makers of the famous Waltham air-friction quality Speedometers and Automobile Time-pieces used on the world’s leading cars WALTHAM ol bear- rc Ze . Stag DOADYDTITT AD MECUANICC ANULEDOTICINC crnrrdrTrAEa

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POPULAR MECHANICS ADVERTISING SECTION 115 BUILT FOR HARD WORK

— f ~ » a L2@ (AACE SVLARCK must be made of sturdy stuff. By its ability / for work, EversHarp holds its leadership. Day after day, its lead is driven to constant sharpness, writing thousands of words, smoothly and steadily. A minute for reloading and the work goes on. Every part of EversHArP is made with precision. The exclusive patented tip is gauged to the thousandth of an inch. It holds the lead firmly. No other pencil has ever been made like EversHArp; no other pencil can be like EversHarp. Put EversHarp on your working force. With no wasteful whittling, no loss of time, it is a positive economy. Styles for pocket, chain or woman’s purse, in gold, silver and enamel, 65c to $65. Made in U. S. A. by THE WAHL CO., Cutcaco. Canadian Factory, The Wahl Co., Ltd., Toronto EVERSHARP Reg. _ 8. Pat. Off

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116 POPULAR MECHANICS ADVERTISING SECTION Guardians of the Circuits The telephone at your elbow seems so simple an instrument, it does its work so quietly and quickly, that it is difficult to realize the vast and com- plex equipment, the delicate and mani- fold adjustments, the ceaseless human care “behind the scenes” in the cen- tral offices. Behind the scenes is the terminal of all the underground and overhead lines on the streets and highways. Here are the cable vaults; the great steel frames containing the thousands of separate wires and fuses for the subscribers’ lines; the dynamos and storage batteries; the giant switch- boards through which your telephone is connected with the other thirteen million telephones in the Bell System. And here, in charge of this equip- ment, are the guardians of the circuits —the wire chief and his assistants— master electricians and experts in tele- phony. Their first duty is the pre- vention of “trouble.” .By day and by night they are constantly testing the central office equipment, the over- head and underground lines, the sub- scribers’ individual wires. And when, from some cause beyond control, “trouble” does occur, nine times out of ten it is repaired before the tele- phone subscriber suffers the slightest inconvenience. It is the skill of the men behind the scenes, together with scientific develop- ment and construction, efficient main- tenance and operation, which make it possible for you to rely upon the tele- phone day and night. “ BELL SYSTEM” AMERICAN TELEPHONE AND TELEGRAPH COMPANY AND ASSOCIATED COMPANIES One Policy, One System, Universal Service, and all directed toward Better Servi«

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ns nes ae” Eee POPULAR MECHANICS ADVERTISING SECTION 117 “Topkis taught me value” ‘D like to have the money I’ve wasted be cause I was afraid to buy an athletic union uit priced as low as a dollar. I cheerfully gave p double, year after year. “I didn’t know Topkis then. ‘Finally, a salesman in Johnson’s shop argued ne into trying Topkis. He landed me as a re-time customer. “My dollar never betore brought me as much juality and value. Loose, airy fit that lets my kin breathe. No skimpiness; no bagginess; no pinch; no pull. “Wear? That’s where Topkis shines. Keeps ” > $1Ze, too. TOPKIS BROTHERS COMPANY, Wilmington, Delaware 250 Broadway, New York City General Sales Offices: Topkis Athletic Union Suits are made of best nainsook and other high-grade fabrics. Pre-shrunk—full size guaranteed. Be sure you get your correct size—38 if you wear a 38 coat, and so on. No good dealer will ask more than a dollar for the Topkis Men’s Union Suit—although many will tell you it’s worth more. Men’s Union Suits, $1.00. Men’s Shirts and Drawers, 75c per garment. 75¢ for Boys’ Union Suits, Girls’ Bloomer Union Suits, and Children’s Waist Union Suits.

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118 POPULAR MECHANICS ADVERTISING SECTION IVER JOHNSON BICYCLES Keep Fit After a few weeks of bi- cycle riding you'll eat better, sleep better, feel better, and work better. An Iver Johnson Bicycle so combines natural exercise with pleasure as to make the exercise enjoyable rather than tiresome. The truss-bridge frame, seamless tubing of nickel steel, drop-forged parts, two- piece crank set—these are some of the features that guarantee the strength, speed and durability of every Ive Johnson Bicycle. The oldest firm in America making bi- cycles continuously. Write at once for free bicycle catalog ““B4.’’ Firearms catalog ‘‘A 4’ also sent on request. IVER JOHNSON’S ARMS & CYCLE WORKS 4 River Street, Fitchburg, Mass. New York Office: 99 Chambers Street San Francisco Office: 717 Market Street Chicago Office: 108 West Lake Street Keep an Iver Johnson re- volver in the home for self- Ask your dealer tc show you protection it's accident- an Iver Johnson Champion proof—you can “Hammer single barrel shotgun. Ac- the Hammer.” Quick, curate, dependable, moder- accurate, safe. alely priced.

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POPULAR MECHANICS ADVERTISING SECTION 119 Cost You Less _— Champion Regular now 75°, Champion X now 60° your Dealer has Champions and cantellyouwhy. . , you should buy a full set. . CHAMPION SDARK PLUG CO. _____ Foledo , Oho. se Oi

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120 POPULAR MECHANICS ADVERTISING SECTION Z No Money¢ Down! Our determination to this year deuble our sales of the world famous Santa Fe Special and Bunn Special Watches prompts this matchless offer. / Santa Fe Special NEWEST 21 Jewe MONTGOMERY i 00 k DESIGNS DIAL While other watch dealers are raising their prices, asking : a you for larger monthly payments, and making payment Adjusted to Positions terms harder for you 4 meet, we are offering ven our Adjusted to Temperature new model Santa Fe Special, no advance in price, no ‘ 2 money down, easier terms and smaller monthly pay- Adjusted to Isochronism = ments. WE realize the war is over and in order to Adjusted to the Second double our business we MUST give you. pre-war inducements, better prices, easier terms and_= smaller Thin Model All Sizes payments. Without one penny of advance payment let us place in your hands to see, to examine, to inspect, to admire, to approve, a real masterpiece in watch creation A watch which passes the most rigid inspection and measures up to the exacting requirements of th great Santa Fe Railway System, and other great American Trunk lines Page twelve of our Watch Book is of Special interest to you Ask for our Watch Book Free—then select the Watch you would like to see, either the famous Santa Fe Special or the 6-position Bunn Special, and let us explain our easy payment plan and send the watch express prepaid for you to examine No Money Down REMEMBER —no money down— easy payments buys a master time- piece—a 21-Jewel guaranteed for a lifetime at about half the price you pay for a similar watch of other makes. No money down—a.won- derful offer. Santa Fe Watch Co. 66 Thomas Bidg. Topeka, Kans. a ee / ee ON | ee ee / eet SANTA FE WATCH CO. 66 Thomas Bidg., Topeka, Kans. Please send prepaid and without obli- gation your Watch Book free, explaining your “No Money Down” Offer on the Santa Fe Special Watch re OP ef |

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POPULAR MECHANICS ADVERTISING SECTION 121 4 Cash Prizes will be Given Away First Prize | $500 Reproduced from an Actual Photo- graph of One of Our Rebuile Un- woods. Big Shipman- Ward 30th Anniversary Contest Open to Every Reader of This Publication. No Purchase Nec- essary. No Obligation! — Here’s an amazing offer! A contest that’s dif- ferent from anything you, ever heard of before! It means real money for you. And there’s no obligation, purchase, , guessing, fees, or payments of any kind! We are giving $1,500 way, and anybody in the U.S., except our em- ployes, is eligible! THE PRIZES FIRST PRIZE e ° $500.00 Second = ° ° 250.00 Third = 100.00 Fourth a 50.00 Fifth ys 50:00 Sixth a 50.00 Seventh 4 25.00 Eighth ee 25.00 Ninth an 25.00 Tenth “ 25.00 Eleventh 25.00 Twelfth “ 25.00 Thirteenth “ 25.00 Fourteenth “ 25.00 Fifteenth “‘ 25.00 Sixteenth ‘ 25.00 Seventeenth to forty-first ‘ TWENTY-FIVE $10.00 PRIZES We make this big contest offer in celebration of our thirtieth business birthday. Since 1892 $s company has been in business in Chicago, and boasts over 337,000 enthusiastic custo- mers. It isn’t necessary to own a Shipman- Ward Rebuilt in order to compete in the big rofit-sharing contest. Any reader of this paper, excepting our employes, is eligible. Just sign the upon to the right, and get thedulldetails now. Our contest plan is so simple that anyone has a good chance of winning. Don’t delay, get your chance to win hundreds of dollars in cash a lutely FREE. Just sign the coupon and mail it as soon as possible. That’sall—and you're under no obligation. So tear out the coupon now! Guaranteed Five Years ve 4 Puts It In Your Home Yes, that’s just what we mean. This genuine Shipman-Ward Re- built Underwood sent to you for ten days’ free trial. Put it in your home by paying $3 down—we'll refund that $3 and pay transpor- tation charges both ways if you don’t want to keep the Under- wood. See for yourself—compare our Underwood with any other typewriter, any make, at any price. if you decide to keep it, you can pay on easy monthl payments~little more than rental. Less Than Factory Price Just think of it! Less than the factory price of anew Underwood and yet it’s impossible to tell a Shipman-Ward Rebuilt from a brand new machine in appear- ance, durability or quality of Typewriter work. The same three full-size models being made and sold by The Underwood Company today —the same up-to-date features! Two-color ribbon, back-spacer, stencil device, automatic ribbon reverse, tabulator, etc. And the famous Underwood feature—ab- solutely visible writing—the entire line of typewriting is visible at all times. Standard 4-ow single shift keyboard. Easy Payments Remember, it doesn’t cost youa penny to try the machine. Then, you may pay cash at a substan- tial discount, or monthly pay- ments so small that you will never miss them. Either way you get the world’s standard typewriter ata big cash saving to you. Getall the facts now—mail the coupon today. Emporium SHIPMAN-WARD MFG.CO “The Rebuilders of the Underwood” Also Manufacturers of THE LIGHTNING COIN CHANGER Est 1892 A212 Shipman Bidg. Ravenswood and Montrose Aves. Chicago his is a photograph of the Shipman- Vard Plant. The big Anniversary con- t marks the 30th year of this company n Chicago. In this plant are manufac- tured the famous Shipman-Ward Re- built Underwoods. Q Act Today! 5 a a a a ene SHIPMAN-WARD MFG. CO. A212 Shipman Bidg., Ravenswood & Montrose Avenues, Chicago. (PLEASE MARK WITH A CROSS) (CD Please send full farticulars sbout you Thirtieth Anniversary Contest. (D Also send me your beautiful Catalog ar tell me how I can get a Shipman-War Underwood for 68 down, This does + obligate me to buy, Name Street or R.F_D Post Office _____ State

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POPULAR MECHANICS ADVERTISING SECTION Peaaiienn” and Motor Mechanics Starrett Thickness GageNo.71 Contains six leaves particularlyadapted for adjusting motor tappets. Also useful for gaging slots. The six leaves have, re- spectively thickness of .0015, .002, .003; £04, .006 and .015. Auto mechanics have been looking for this tool. in the Starrett Catalog No. 22APand special who know Starrett Tools prefer them for their superior quality, more efficient design, greater durability and dependable precision. When they buy Starrett Tools they know they're getting value for every penny spent. Illustrations: and complete descriptions of the entire Starrett line of fine tools are given Supplement of new tools. Copies free on request. THE L. S. STARRETT CO. The World's Greatest Toolmakers Mannfacturert of Hacksaws Unexcelled ATHOL, MASS, Starrett T-Handle Tap Wrench No. 93 An extremely handy tool for holding prac- tically all small tools to be turned by hand. New clamp construc- tion insures firm grip on tool. Heat treated jaws guarantee durability.

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POPULAR MECHANICS ADVERTISING SECTION 123 ed it N is the time to build r BS of O your Harris Home! BRE TS ' , j ; i, And here is a mighty organization of thirty great departments ready to as 7-4 serve you, anaged by aoe material buyers, designers and practical builders. We . have vast stocks bought at huge quantity price savings which are now at your com- mand, sole aim and purpose is To hel et a home that will entirely you g satisfactory at a price that will mean a substan- tial saving in actual dollars of your money. , The combined efforts of these great departments in experimenting and testin ye materials and methods of construction have produced for you a GUARANTEE ‘e home, expert machine cut, bundied and marked—the last word in building economy. . Not One Penny in Advance 3° So sure are we of the super-excellence of our material and our GUARANTEED ry Ready-Cut System that we will ship you any HARRIS HOME without the pay- ment of one cent down. Our Plan k explains our liberal terms fully. S - FREE Plan Book The latest edition is waiting for you, contains our FREE PLAN OFFER and 4 hotographic reproductions, with floor plans and specifications of 100 beautiful o omes. ail coupon today, sf Building Material of All Kinds Ws or over a quarter of a century, thrifty wise buyers have realized that bere is the & open door’’ to real economy, whether it be a brand new home or material for im- of provements or repairs. Our big stocks of brand new building material, all pur- 4 chased in tremendous quantities at savings that are passed along to you are ready y for quick and complete shipments. Bi “PRESTO-UP” Patented Bolt-together Buildings! The wonder buildings of the age. Guaranteed buildings, for quick Industrial hous- ing. Individual Homes, etc., extra strong, practical and suitable for all year ‘round habitation in any climate, SO ditferent plans. They come to you in easily handled sections—painted and stained, ready to bolt together and move in. Plumbing and Heating! Hot water and heating systems, warm air heating plants, pipeless furnaces and plumbing material of every kind— Roor the product of America’s leading makers. Our mammoth plumbing stock offers unlimited possibilities for you to SECOND save money. Our heating plants are guaranteed to heat CCOND FLOOR PL your home in any weather with big fuel economy. Mail AN the coupon for our Plumbing and . | Heating Bo: x pee get Lon “| of our Expert Engineering Service, HARRIS BROTHERS CO. “ HARRIS BROTHERS co. These books are FR. EE and sent post HICA id, ark an * in the squares to 5 1349-1525 W. 35th St., C GO ndicate which ones you wish. / deel AW cian Bx Home Rook of “‘Presto-up” = a Sc SOS BY isk? eae sO 5° a > S58 - LAG Book of Plans Houses and Garages ; Hee SO a Es ee, 2 Building Material Plumbing and | Mm Se3 ep es SOR BOOK C1 Catalog” CO iiecting boos | 4 7S ey) Bite p28 4 eh. eS oe Dee tb0bR kde bEbes 08s owes ; : “ r Any tf a EE ee ee ED ‘ ‘ me Re a : OR i ag

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124 POPULAR MECHANICS ADVERTISING SECTION i 4 i ~ faitaibaitailadwibaita Says Ss -semmme > Down Brings This BRAND-NEW TYPEWRITER Pay the balance in small monthly payments. We will ship the typewriter to you for ten days’ free trial. $ The Annell’ is Standard in size, appearance, con- struction and mechanical operation, with an action so smooth and a touch so responsive as to be a source of constant pleasure to the experienced operator, and making the progress of the novice immeasurably easier. It turns out beautiful work. The type is clear, clean-cut, hard; the alignment and spacing are utterly perfect. ‘The speed is unlimited; no operator can crowd the Annell’., Extremel simple in construction, it is trouble-proof, sturdy. and will last a business life- time. It embodies the ideas and experience of me- chanical geniuses who have been making typewriters and typewriter improvements for generations, Every Operating Feature The Annell’ has every late-style feature and modern operating convenience — each letter completely visible as written (together with all the previous writing), Back Spacer, Tabulator, Two-Color Ribbon, Right- and Left-Hand Shift Key, Shift Lock, Margin Release, Adjustable Line Spacing, Adjustable Margin Stops, Paper Release, Automatic Line Spacer on Carriage Return, Adjustab le Paper Fingers, etc., also the 42-key, 84-character Universal Keyboard. Rubber cover and all extras shipped with each ma- chine. Big Saving—Over a Year to Pay We are the only company selling a Standard 42- key, 4-Row, Brand-New Typewriter direct to the user by mail at practically the wholesale price of other high-grade typewriters. Our remarkably low rice and monthly payment plan enable you to buy a Seomih new typewriter easily and conveniently—over a year to pay. Fully Guaranteed We protect you with an ironclad guarantee against any flaw in material or workmanship. No Risk—10-Day Free Trial We will prove its high-grade quality by sending the Annell’ to you forten days’ trial. Use it on any of your work. If not satisfactory, return the machine to us. We will refund the express charges and any money you have paid, and the trial will cost you nothing. You are the only judge. Could anything be fairer? Send for Information, or Send the Coupon Send coupon or a postal today for full informa- tion about the greatest of all typewriter offers. Don’t miss it. Act now. ANNELL’ TYPEWRITER CO. 629 No. 230 East Ohio Street, Chicago i NOT AN ORDER -MAIL TODAY Gi ANNELL” TYPEWRITER CO. 9 No. 230 East Ohio Street, Chicago. ; Send me complete information about your wonderful typewriter offer. This places me under no obligation. Please Mention Popular Mechanics Sngersotl atches The Utmost in Value ORE than merely low price sets Ingersoll apart from ever} other watch. There are other low- priced watches. Ingersoll watches are reliable, sturdy, honestly good-looking, as well as sold for so little money Your dealer will show you the complete line. Announcement By an arrangement c mp eted on Mar gist, the Ingersoll assets were purcha y the Waterbury Clock Company. Thu Ingersolls are now marketed direc tly L manu facturer - who have m ade In 7eT lls from the beginning Waterbury Clock Company Factories: Waterbury, Conn. Sales O New York San Francisco 137 Centre St. 360 Fremont St. Chicago 215 W. Randolph St. RADIO DETECTORS Size 344x2’. An improved tector of real merit Ni plated posts. Fibre bas Price 75 cents, postpaid Dealers get our pel es on and Binding Px | SYPHER MANUFACTURING couren ' Dept. M , OF

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- MPANY D, OH! POPULAR MECHANICS ADVERTISING SECTION 125 SAVE HALF - INSTALL YOUR OWN PLUMBING-~HE ATING 23°35 Send for Our Big Handy-Man Plumbing and Heating Encyclopedia It shows and explains our NEW EASY METHOD—how to save lled labor, unnecessary material and heavy work. Any handy nan can do the installing with our simplified systems and working lans. OUR NEW EASY METHOD saves much cutting, thread- g, timeand material. Even dre are ope r the big saving by ising our products and NEW EASY METHOD will surprise you. Big Book Saves Labor and Material ery builder, mechanic, farmer, etc.,needs this BIG INSTRUCTIVE PLUMBING AND HEATING ENCYCLOPEDIA Besides being our whole sale catalog, it contains hundreds of floor plans, elevations, diagrams and installing sketches from ‘ simple st to the most difficult ~ og ms, showing our EASY METHOD of es your own plumbing or heating, gives ireds of mechanical] rules, kinks, receipts, short cuts, ete., how to lay out lumbing and heating, estimate costs, repair ks, ete. It shows and describes over 10,000 FACTORY FITTED — ing and heating fixtures and supplies with -* sale prices; helps you to select the best plumbing outfit, or heating plant, to meet your needs. Any handy man can the insté alling with the aid of OUR HANDY-MAN PLUMBING AND HEATING ENCYCLOPEDIA. Our Factory Fitted Plumbing and Heating BATHROOM OUTFITS, TOILETS, LAVATORIES, BATH TU i SINKS, LAUNDRY TUBS, WATER SUPPLY SYSTEMS, WATER HEATERS, PUMPS, PIPELESS AND WARM AIR FURNACES, HOT WATER AND STEAM PLANTS, PIPE, FITTINGS, VALVES, ete. All out- fits factory fitted for the handy man, with beauty, durability and EASE OF INSTALLATION built through and through. SEND 25¢ FOR YOUR COPY TODAY : | HARDIN- LAVIN co. 4547-57 COTTAGE GROVE AVE., CHICAGO Enclosed find 25c. Please send me your HANDY- hala i MAN PLUMBING AND HEATING ENCY- — —— CLOPEDIA with wholesale discounts, and mail Street | me your monthly bulletin, “Service.” 25c¢ to be re- and No. __ - = | funded to me with my first order. City State et a -. > ake it a Real VER the hills to vacation land —with care left far behind! Fifty miles or five hundred, good $ roads or bad, just say where you want to o> vacation! go and a Harley-Davidson will take you ne 5 there—comfortably, swiftly, economically. Miles are but pleasant minutes — dis- tant lakes, streams and camping grounds are but a jaunt one ay when you ride a Harley-Davidson. With your pal and a week's provisions in the roomy sidecar, S you're off for the time of your life—-a [> > vacation you'll never forget ! 7 And you don’t spend most of your vacation money for carfare when you ride a Harley-Davidson. 50 miles for a dollar—gas, oil, tires and all. That's all it costs! Ask your dealer for a free demonstra- tion and his easy payment plan Or write us for illustrated literature HARLEY-DAVIDSON MOTOR CO. Milwaukee, Wisconsin Attractive dealer proposition for un- u- assigned territories. Address Desk A-2 Harley-Davidson lv “Worlds _ ten Motorcycle “ky [nnn COU PON -— — — — — — — — - — — - - | an

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That noon whistle means “‘Icy-Hots !” AT a piping hot dinner from your Icy-Hot Lunch Kit — feel good all day! An Icy-Hot Lunch Kit keeps your dinner fresh and tasty, and your coffee piping hot and full of flavor. This summer have refreshing lemonade or other iced drinks icy-cold in your Icy-Hot on the hottest day. Dinner from an Icy-Hot tastes just as good as at the dinner table at home. The Icy-Hot Lunch Kit is all- metal, dust-proof, moisture-proof, and is built for lifetime service. Icy-Hots are always on the job keeping hot things piping hot twenty-four hours or cold things icy-cold three days. Get an Icy-Hot Lunch Kit today and enjoy a regular hot dinner when the noon whistle blows tomorrow! oy neon womeen OF Look for name Icy-Hot on bottom. Sold by reliable dealers every- where. Send for illustrated catalog. THE ICY-HOT BOTTLE CO. 192 W. Second St., Cincinnati, O. ICY- HOT VACUUM PRODUCTS Madein America, of American Material, by Amer- ican Labor. Built for Lifetime Service tle 4 Ono ~t3. The ic y-Hot —~s C uci ati, : y-Hot products 192 w. Secon® * Jete catalog ° ‘ jy comp Please sem Name . ¥ Numbe and + Street 4 p.O KEEP CONTENTS HOT 24 HOURS: COLD 3 DAYS. Please Mention Popular Mechanics POPULAR MECHANICS ADVERTISING SECTION —HERE IT I[S- | THE MERKEL MOTOR WHEEL A self-contained power unit to convert the bicycle into a motor driven machine, can be fitted in place of the rear wheel of any standard bicycle. | The final answer to the transportation ques tion. No skill or special tools required to in stall it. It is equipped with a clutch, thus permitting motor to run when you stop your bicycle in heavy traffic. All working parts automatically oiled. The Merkel Motor Wheel is not a TOY or Make shift. IT’S A PRACTICAL POWER PLANT. De signed to meet the long felt desire of the Bicycle rider POW ER—Enough to master all hills on the highways SPEED—Sutflcient for safe riding. Simplicity of operation, any Lady or Gentleman | Girl or Boy owning a Bicycle can operate it. ECONOMY—No other Motor vehicle in the World can be operated as chez aply - A. Merkel Motor Wheel, FOUR MILES for ONE CENT. SATISFACTION—More — you have hed with your bicycle, because it will speedily take you there and back without exertion on your part. Price $85, F.O.B. Springfield, Mass. Send for Merke! Catalogue If there is not a dealer in your town selling Merkel Motor Wheels, write us—we want agents everywhere | HENDEE MANUFACTURING CO. | MERKEL MOTOR WHEEL DEPT. SPRINGFIELD, MASS., U.S. A.

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POPULAR MECHANICS ADVERTISING SECTION 127

The power you may never need HOUGH you may never have occasion to draw WESTINGHOUSE upon the reserve power of your Westinghouse pc wok 1 with thi Battery, the mental serenity you derive from knowing Soe elentinahen it is there is priceless. oe Se ee bat ~ Westinghouse Batteries carry the name, reputation — SS and guarantee of the world-recognized sponsors of the Station air brake, automatic railway signals and other appli- ances for safety in transportation, They are not only rugged in construction, vigorous and resourceful in WESTINGHOUSE : b built “ : ”» Thei ] AD 10 action, | ut are pul t “oversize. eir extra p ate area R —running as high as 25 per cent in common sizes—

Retina 9 means larger capacity, longer life, greater dependabil- eliminate a yat- . . . . tery trouble in ity. Truly this is the kind of battery you have been mw poem looking for!

One quality battery—the best Westinghouse can build! WESTINGHOUSE UNION BATTERY CO., Swissvale, Pa. | WE STINGHOUSE BATTERIES Play Well in 4 Weeks eS:

il ight & Months to Pay , Latest C Melody Saxophone Outfit complete, onty 395— DIAMONDS »west price ever quoted, Sent on 6 days’ trial. it satisfied, tras ay om y S108 mo: eae f ” § months, 5 No interest to pay—no ex- ra Su it inciudes finest nicke a od and ric “bly lined i Ase, + tion Book, Album of Popular Gexephe me Solos, F ‘a wo Ce t a Day | cre ic Lyre, Carrying Strap, M« cutheloes and three fine Reeds, r a e n s ” Diamond bargains—128 pages of them. The greatest Diamond hook ever pub- ) i ‘Masterbilt Saxo hones Usbed sent free for your aame and address eo choice of millions of doliare ° Highest quality. built in perfect tune, assembled and tested by worth of diamonds sent upon request. No y down. Terme on low conten cents a day. 8 per cent yearly increase in value guaranteed, Extre 6 per cent Ws it T bonus may be yo of od. 128- k, thousands beresins. a ee ay fi fir obliga! otlone tions. Write NOW to Dept. A177. 1 Maiden Lane

experts all latest key improvement«, light, quick action and beautiful finish, Order direct from this advertisement or write for Free Catalog Folder today pee Sazophone Shop, 427 s. Webech Ave. 9 Chiesee n est Exclusive ers in xO

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128 ENDERS SALES COMPANY 105-111 West 40th Street, New York POPULAR MECHANICS ADVERTISING SECTION SAFETY RAZOR Just like ‘ace with ° Perfectly Simple Simply Perfect ENDERS SELLS FOR $1.00 with six blades of the best quality Swedish-base steel. Packed in black Keratol box, velvet lined. Extra blades, package of 5—35 cents. INCANADA —Razor, $1.50; blades, 50 cents. For Sale by all Up-to-Date Dealers Everywhere CIGARETTE EJECTOR | **‘Just Press the Button’’! and up it comes! Latest in “smoke” cases. Keeps cigarettes perfect, pre- vents crushing. Works every time, smoothly, noiselessly. Every smoker wants one. Mailed to you for $1.50 if not at your dealer's. NT making big money. Sells easily from AGE S $1.50 to $16.00. Write quick lee on clusive territory. Dealers, get big retail offer. THE LYONS MFG. CO., Dept. M. P. \ 342 YORK STREET, NEW HAVEN, CONN. J $3 Cash Buys Tupewriter LL . Balance Only $5 Monthly 8 wm! Save 35 to 60% on all Standard makes— “ i |W =. ms Underwood, Royal, Remington, etc Every machine thoroughly rebuilt and GUARANTEED. Try 5 days at our m expense before you buy. WRITE at once for Free Descriptive Circular and Special Low Prices. WYNN TYPEWRITER EXCHANGE f.tcites, "yt: Nd f. JUST WHAT YOU WANT! The NON-SKID Ink Stand put" Cannot move, slide or stray from where lace it. A cork insert at bottom does the tr Made of iron. Will hold any regular size d ink bottle. Lasts alifetime. Heavy eno to be used as a paper weight. Mailed day your order is C received. KOLESCH & CO., Sole Mfrs. let. 1855 138-A Fulton St.. New York Postpaid Be the First in Your Club School, City or Town, to wear this; all wool sweater, double collar and Your choice in colors. This jersey * selected by 10,000 of my customer last season. Your chum will ré mend it. Send for my big illust catalogue. Write me and learn m) for your club's order. Popular Pr Best Grade Sporting Goods Base Basketball, Tennis, Golf, Footbal! WRITE ME NOW Jack Shannon Co., Dept. 46, 111 So. Dearborn St., Chic OLISH, | DAUBER BRUSH combined |: convenient article. Poli in a tube enclosed in ' case on top of brush, and * tube is used up, new may be obtained at le stores everywhere, 25 Buy of your dealer or direct, stating whether t tan, ma any of whte is c Fime opportunity for agente. Postpaid anywhere $1.25 Address Sales Dept The Kaxo Co., Cambridge, 39 Mass HAWAIIAN iM. DIAMONDS

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hica gt Mass DS POPULAR MECHANICS ADVERTISING SECTION 129 —APPEARANCE HE appearance of Brown & Sharpe Machinists’ Tools is in keeping with their superior accuracy and dependability. It reflects the careful workmanship which produces them. Add this micrometer to your kit. Its splendid finish will be a continual source of pride. The thorough reliability of this accurate measuring instrument will give you the confidence to carry through the most difficult tasks with sureness and speed. Your dealer will gladly show you this tool. Ask him for our No. 28 Catalog or write us direct. BROWN & SHARPE MFG. CO. PROVIDENCE, R. I., U.S. A. BROWN & SHARPE MACHINISTS’ TOOLS The First Precision Tools in America The Best Precision Tools Today Moore Push-Pins Glass Heads -Steel Points Moore Push-less Hangers To hang up things Ask your dealer to show them Sold» er a 107% packet Moore Push-Pin Co. Wayne Junction Philadelphia You'll Get A Year’s Wear or more when you buy SuSPENDERS No rubber to rot. Phosphor, Bronze Springs give the stretch Ask Your Dealer for Nu-Way Suspenders, Garters and Hose Supporters If he hasn’t x them, send direct, giving dealer's name. Every pair guaranteed. Nu-Way Strech Suspender . Mtrs., Adrian, Mich. Send for a Complete Catalogue of MASONIC BOOKS @Jewelry and Goods | REDDING & CO. Publishers and Manufacturers ~ Dept. P 200 Fifth Avenue, New York

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130 LOFTIS BROS, & CO. "i354 E high ech ei cbouia have ool girl » Every high wage-earning girl needs one. a charge account with LOFTIS. Any price you wish. The beautiful Ring and Wris OFTIS BROS & CO. fs cers 108 N. State Street, i. SELF- FILLine ~ JNK PENCIL * INDEPENDENT ” Meets alt require- ments. & filling, a Seeee Mee cing scold Sue 1 point. Your Name in Goid—35 Cents Extra AGENTS WANTED _4.C. ULLRICH & CO., 161 Washington St, New York HOME LOVERS’ BARGAIN BOOK FREE Showing Over 10,000 Furniture Bargains All selections loaned free for a month. Take a year to pay if satisfied, paying little by little almost as you please. SPIEGEL, MAY, STERN CO., 1108 W. 35th St., Chicago Now you can buy famous, 9-pound N ational Type- writer direct from the fac- tory, after 10 days’ trial— absolutely free. You be the judge. Then we give you 10 MONTHS TO PAY Same machine as used by thousands of doctors, wycrs, bankers, salesmen, students, writers and busi- ness men in 31 countries. 10. Months Every feature of best, stand- to Pay ard size machines. 28 keys 84 characters. Brand new—not a rebuilt typewriter. Rend indgy tor sur 46 Days’ Free Trial Stes saa'ié 0 ays’ Free ° Moenths’ Easy Payment Pian. ee NATIONAL TYPEWRITER CO. Dept. 7F. Fond du Lac, Wis. \ POPULAR MECHANICS ADVERTISING SECTION Sp ecial-to introduce my PAR- AMOU NT SHIRTS All New York is wearing Par- Amount Shirte—has for years. I have ten Par- Men’s Shops in New York City. I have just « decided to make itp for you je of New York a to wear the same latest patterns customers get satisfied with 4 warehouse mer- chandise, or price. I can olter aw fais amp = “Ghished shirts of Genuine d material that so ars two or Gescewiney, shirts. Tocen skim ped— big com- fortable coat style shirts, the roomiest made. Non-fraying -bands, box at selected — buttons, but- PAR-AMOUNT SHIRT SHOPS General Offices 155 East 57th St., New York PRasioent taking orders for Non-Alcoholic Food Fla- vors. Every variety. Putupincollapsible | tubes. Alw>s fresh. Three times the ff strength of bottled flavors. Not sold in stores. Fast repeaters. Big income every day. Men and Women devoting full time can make $6 to $9 a day. Big money for spare time. Largest concern of ite kind in the world. Over two million dollars worth of orders taken last year by our Representatives for Zanol Pure Food Products, Toilet Prepara- tions, Soaps, Laundry and Cleaning Specialties and Household Supplies. Every article guaranteed. Write for Sample Outfit and Money Mak- ing Proposition. American Products Co. 6677 AMERICAN BUILDING CINCINNATI, OHIO “BOW LEGS and KNOCK. KNEES” UNSIGHTLY SEND FOR BOOKLET PHOTOS OF MEN WITH AND WITHOUT THE PE! PERFECT LEG FORMS PERFECT SALES CO. 140 N. Mayfield Ave., Dept. §, Chicago, Ill. AGENTS *6 A DAY rm! $60~ $200 a ao. ‘ — GOLD SIGN TT ERS for stor as and office window ape on. No experience necessary. Saas demand OFFER TO GENERAL AGENT METALLIC. LET CER CO., 433B, N. Clark St., “CHICAG! ‘

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POPULAR MECHANICS ADVERTISING SECTION 131 W.L.DOUGLAS FOR MEN AND WOME YOU CAN ALWAYS W LDOUGLAS SHOES TO YOU AT ONE PROFIT nue ss 2.8% ~ Hoe” AGAINST SAVE MONEY BY WEARING | SOLD DIRECT FROM FACTORY “ Seg ¥* Kn STAMPING THE RETAIL PRICE Fe! AT THE FACTORY | THE STAMPED PRICE 1S YOUR PROTECTION UNREASONABLE PROFITS BY MORE THAN FORTY YEARS EXPERIENCE IN MAKING FINE SHOES They are made of the best and finest leathers, by skilled shoemakers, all work- ing to make the best shoes for the price that money can buy. The quality is unsur- passed. Only by examining them can you appreciate their wonderful value. Shoes of equal quality cannot be bought else- where at anywhere near our prices. Our $7.00 and $8.00 shoes are excep- tionally good values. W.L. Douglas shoes are put into all of our 108 stores at factory cost. We do not make one cent of profit until the shoes are sold to you. It is worth dollars for you to remember that when you buy shoes at our stores YOU PAY ONLY ONE PROFIT. No matter where you live, shoe dealers can supply you with W. L. Douglas shoes. They cost no more in San Francisco than they do in New York. Insist upon having W.L.Douglas shoes with the name and retail price stamped on the sole. Do not take a substitute and pay extra profits. Order direct from the factory and save money. = 4 Write to-day for free Catalogue of our MOVIE MACHINES $700 & $8090 SHOES ALSO MANY STYLES AT $5.00 & $600 W.L.DOUGLAS PRODUCT IS GUARANTEED W.L. Douglas name and portrait is the best knownshoe Trade Mark inthe world, It stands forthehigheststandard of quality at the lowest possible cost. The intrinsic value ofa Trade Mark lies in giv- ing tothe consumer the equivalent of the price aid for the goods. £ Catalog Free, President y, W. L. Douglas Shoe Co., 728 Spark St., Brockton, Mass. te) PRES * 25 cis'|| We Pay $22, Day more than machines costing ten REAL MOVIES FOR THE HOME times its price. Easily carried Wonderful Models $6.00 to $25.00, with film with you anywhere. ; SaeA ween: MFG. 6e.. Dept. M Boxi3 Boston, Mass. BIG OPPORTUNITY for any man working spare time or full time Easy to take orders on and get our 48 p. catalogue of IDEAL Model account of low price Big gest prop Aeroplanes, Parts and Supplies. Tells how g ition ever offered to our Special to build Aeroplanes that fly like real ones. Re es sentatives. Write for de monstrat- IDEA R Y co. 159 Wooster St cor, W. Houston Wew York City ing sample, terms and territory. THOMAS MFG. CO. Chest 448, Dayton, Ohie

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132

Free Book of DIAMOND BARGAINS Send for the most com- plete catalog of Dia- monds and Jewelry ever published, showing ex- quisite gifts of every de- scription—every article a rare bargain. Anything you select will be sent for FREE examination and approval. If satisfied, pay only one- fifthpurchaseprice— balance in 10 months. Send TO- DAY for catalog No. 62-L. \

set with perfectly cut, blue- white Diamond. Price $45 = Terms: $9 Down, $3.60 a Month, Solitaires from $25 to $1000 SWEET Engagement Ring f “THE HOUSE OF QUALITY LW-SWEET INC. 1650 - 1660 BROADWAY, NEW YORKL

and Summer FO RCA M Wear Best quality, lowest prices. Our money back guarantee covers all purchases. Army Shelter Tents...........---+s++% $3.00 Khaki Riding Breeches 3.00 Khaki Trousers ..... 2.50 Flannel Shirts ..... ; .. 8.00 Khaki Shirts . Ss Camp Cooking Grates. .30 Folding Mess Pans.. . od Athletic Shirts .. : ae Army Folding Cots 4.00 Army O, D. Wool Blankets 2.75 Army tents of all sizes and for Camps or outings. RUSSELL’S, Inc., 245 W. 42nd St., New York Formerly Army & Navy Store Co. Catalog 112 Free on Request

sn complete line of high grade nationally known band and orchestra instruments before buying. Big FREE catalog senton request. Easy ment plan---PLAY WHILE YOU PAY. FREE lesson certificate with each instrument. ‘3 Musicians Earn Big Pay. Learn to play from we Jenkins’ Band and Orchestra Books. First violin m or cornet parts FREE. Our 44 years in business is your guarantee of reliable service, Post card ' GS zs BIG FREE CATALOG. \ > J. W. JENKINS SONS’ _— co. ¢ 910 Jenkins Bidg. Kansas City, Mo. oy POMS CANO ANGDA VL 644 OMVVDAYDAD. “one © TEV eres CALF ODO

POPULAR MECHANICS ADVERTISING SECTION

Ask for Proof that you can Hear! For fifteen years we have been urging every deaf person to try the Acous- ticon for ten days, abso- lutely free of cost or obligation—this because we are confident that our constant and expert effort has succeeded in keeping it more effi- cient than any other device. We again urge you to accept the 1922 ACOUSTICON For 10 Days’ FREE TRIAL No Deposit—No Expense If you learn of another hearing device which claims equal efficiency, ask for the same free trial which we offer and compare the two in your own home. We will be very happy to have you choose the one which suite you best and return the other. Let no one con- vince you but yourself. DICTOGRAPH PRODUCTS CORP. 1307 Candler Bidg. 220 W. 42nd St., New York City eating L RON AGENT MAKE $12 A DAY New ecientifico development mekes ae remarkably easy. No wires } —all seif » e. clean, quick heat, easily regu- —< Costs — cent for 3 hour’s use. ves steps. Cats ironing time in half. Sells fast. Mrs. Wagner, Ohio, sold 25 in ant hours spare time. Moyer, Pa., made 3164. 00 in one week, You can do as well. No experience necessary. Work all or spere time. You simply take orders, we deliver by percel post and do collecting. ee per a Fe seme day you take orders. Send for Catalog and FREE OUTFIT OFFER. Write today. AKRON LAMP CO. 35 Iron St., Akron, O.

40.000 Opportunities in Hotels Nation wide demand for high salaried men and women; past « @nce unnecessary; we train you by mail and put you in touch with bic opports Bic Paty fine living. Mw Te quick advancement; permanent. W rit for Your B LEWIS HOTEL TRAINING SCHOOL, Room 328, Washington, D. (. Build Your Own

|PHONOGRAPH

IT’S EASY WITH OUR HELP SAVE A few hours’ interesting work saves over OVER half and gives you a machine to suit your ideas. We furnish motors, tone HALF arms, case material, blue prints and full instructions. Piays any record Make fine profit building phonographs for your friends. FREE Write today for our Blue print offer. wanted for Choraleon Phonographs. AGENT CHORALEON PHONOGRAPH CO. 622 ist St., Elkhart, Ind.

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AVE VER |ALF POPULAR MECHANICS ADVERTISING SECTION Send today for this free booklet. T pacer pee ss - 4 Own a Corona! Increase your income HIS wonderful little 614 pound folding typewriter pays for it- self in time it saves and work it turns out. Fold it up—take it with you—typewrite anywhere, CorROoNA The Personal Writing Machine REG. U.S. PAT. OFF TL PESRES SEES Seen: Mas eeeesas TTITITITITITLL LLL tl tt TITTTIT Tlie paseweees = ans pmeeee as Corona Type- writer Co., Inc., 108 Main St., Groton, N. Y. 4. = TITETTITT IL — fret) Pe sod ona The New- Day Dentifrice : \ Z 50 a Day FREE AUTO OFFER Men and women to distribute nples and take orders in city nd farm homes. We show you ecure Auto by our plan. No ex- @ GET THIS wrience necessary. Write quick. ~—~ REE GAR THE JIFFY SOAP | PRODUCTS CO., Dept. 1 1, Dayton, Ohio how to make $7.50 a day and Guaranteed for 2 years solid Wear or your money cheerfully refunded, These pants are a **Won- der- Valoe™ worth $6.50 sent to you for $1.97 asa sample of fine tailoring. AGENTS WANTED EARN $50.00 a week in your spare time. No experience necessary, Write today for our BIG FREE OUTFIT with dozene of the newest styles and attractive woolen samples to choose from. Everything sent FREE. WASHINGTON TAILORING CO. Dept. F-345, Chicago, Illinois Ms nding. FREE Trial strip of Tirro. Mail cou- pon below. Stop that leak this new way To mend leaky hose; the neck of a water bottle; broken crockery; torn sheet music; to wrap a golf club; to insulate wires; to seal preserving jars—use Tirro, the new waterproofed mending tape. Bauer & B lac k—spe Cli il- ists in tapes a 28 years —make it. Extra strong, extra sticky. Clings to glass, metal, rubber, paper, china. Mends some things tem- porarily, others perma- nently. The Handy Andy of the home and garage. You can color it to match the article mended. Try it. “Won- derful!” you'll say. Three Sizes: Small, 15c: Me- dium, 25c; Large, 60c At Drug Stores =. (~ we — MAIL THIS Tirro For Free Strip BAUER @® BLACK, 2500 Dearborn St., Chicago. Mail me a strip of Tirro. Please Mention Popular Mechanics 133

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134 Puts this - ‘CFces ete bane Diamond CLUSTER RING ON YOUR FINGER There is no red tape about this pheno- menal offer and we are positive you will be entirely satisfied with this won- derful gem, It’s true, a $1.00 bill will putthie beautiful ring on your bas seven D-rfect cut genuine diamonds Looks like 1% carat’ Compare this gem with al 1-2 carat d you will see that it resemblesa $700 oo 7. perfectly cut, 7 sperkling, brilliant stones are set A aalied beats. not just Platinum Top which gives it added beauty Send us a eye bill with yous, name and ress and =e w —_—— this wonderful bargain to you by retur: Wear it 30 DAYS if not satisfied after 30 days, return refund your money. Never in history has such a, bai d.Tryto buythiscluster forlessthan $85. You agree we offer a res! bargain. This is oneof, mong bargains ijlustrated in our Free cata- logue. Rush your order today to Dept. AC50. Shimer ‘gman 37 MaidenLane N.Y ple from all other Air- flee, The Benjamin is really a strong air- pump used to compress the air in the air chamber to any degree of power desired. From one to six etrokes of the pump give all the force necessary. Each adk itional stroke gives increased power. The Benjamin works on the ame principle as all air-drille and air-hammers— with this difference: You control the shooting Jorce as you de- sire. Look att “ of hardwood. It hows how Benjamin power ts regulated as you wish. You can't have accidents with a Benjamin. It's safe, always, because you control the “s wer. The Benjamin never loses shooting orce, and has no springs to get out of order or shake youraim. Write us for an interest- ing folder about this wonderful air-gun,. AIR-RIFLE & MFG. CO. 615 N. Broadway, St. Louis, Mo. Pacific-Coast Representatives: Stuart & Otte 220 Wilcox , Bidg., Les t- Angeles, Cal. &.. POPULAR MECHANICS ADVERTISING SECTION Make Big Money! OWN YOUR BUSINESS Kingery Pop Corn Poppers and Peanut Roasters are proving the business salvation of thousands of men. You need but little capital and your dividends are enormous—70c profit on every dollar Adaptable for outdoor use, shows, drug stores, fruit stores, general stores, confectioners, news dealers—for any one who wants to make big money with least expense of time, effort or capital Write for new 1922 catalog showing FULL line for any location or any business. Over a hundred styles Most reasonable prices and terms. THE KINGERY MFG. CO. Established 1876 Cincinnati, Ohio Dept. 242 St. Chicage -~, Cards, circulars, labels, tags, book, menus, paper Press, $12. Larger $5. Job Press $150 up. Save mone Print for others, BIG PROFITS. All easy, rules sent. Write factory TODAY for press catalog, TYP! cards,paper. THE PRESS CO. D-37, MERIDEN, CONN. . . . 99 ‘*Lighting Fixtures READY TO HANG (Direct from Manufacturers) Completely wired, including glasswar: New designs. Send for catalogue No 24 Send for DEALERS’ proposition ERIE FIXTURE SUPPLY CO. STA. A. ERIE, PA. Write today for your FREE copy of this complete Sporting Goods Catalogue. Buy by mail and save money Every price is cut, every article is absolutely guaranteed. Your money back if you are not satisfied. It shows fishing rods—split guaranteed 12 Ib. test cast tents 7 x 7 ft. $7.65; tents kk . athletic goods. Standard qualit: 7 St = Big savior. “Write today for this complete Sporting ond Athletic Catalogue Address: Dept. G-10 Montgomery Ward & Co. Kansas City b.2m voste at at elle tices; au hese Lolo s2s.08 ouits out-of -doors, it bamboos as lines at aber Ts on a

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POPULAR MECHANICS ADVERTISING SECTION AN INCOME FOR LIFE Do you want it? Then send for this free book. — shows you how the man and woman of average means buy outright, with two oy to pay. Bi web qrace listed and su dividend paying securi Steel, Westing- house, ern Union, etc. This Gloreting book explains in detail ond 1 You can phe g five times as much with your * available cash 2 You can take immediate advantage of pres- * ent low prices of high-grade securities. 3 You get all dividends and market increases from date of purchase. 4 You have two years to pay through this * new monthly payment plan. 4 You are absolutely protected fluc- * tuations and are guaranteed against call for additional funds. You can start “An Income for Life” by small monthly payments which you will never miss. The business man or woman, farmer, teacher, mechanic, in fact every one who is thinking of his future and will lay aside $10, $15, $25 a month or more can take ad- fees ew ee vantage of the present oppor- tunity to secure high-grade securi- ties at bargain prices and start building “An Income for Life.” Don't fail to write for this valuable book today—it’s more than worth while. It means “AN INCOME FOR LIFE GET THIS BOOK lownsrment Seawr (ties Cv Investment Securities Co. Suite G0 Moffat Bidg., Detroit, Mich. a A powerful portable lam power pure white light. dairyman, stockman, etc., needs. giving a 3uvU candle Fast what the. farmer, Safe — Reliable Send for New Book ft! GOVERNMENT The Best Light Co. 324 E. 5th St. Canton. 0. — Economical — Absolutely 3 ont Pes On Musical proo urns either gasoline or kerosene. Light Ni ¢ h in weight. to hgents wanted ted Write for Catalog. Instruments O a rg e VERY known instrument illustrared, many in full colors. All details and complete descriptions. A veritable musical encyclopedia—absolutely free! Beautiful HOUSES ‘nd BUNGALOWS *900 _ CAN BE BUILT FoR his and many others in or ook, Building Plans for formes, will eave you hundreds of ars. One of the most or ompr nsive books of ed by any architect. New editio: so = of tue ane and ied hoe FREDERICK H. GOWING ob ‘tig from $200 ap: gives shes and ARCHITECT 101 Tremont St., BOSTON MASS. You may now have any musical instrument for a week's trial in your home at our risk. No obligation to buy. Re- turn the instrument at our expense at the end of a week if you decide not to keep it. The trial will not cost you a penny. | Monthly Payments A few cents a day will pay. Special combination offers in complete musical outfits —welvet lined case, all accessories, self-instructor, etc., all at direct factory price — everything you need at practically the cost of the instrument alone. Wurlitzer instruments are known all over the world for artistic quality. Used by the greatest musicians, bands and orchestras. Wurlitzer has made the finest musical instru- ments for over 200 years. Write Today. Wurlitzer has stores in over thirty cities. But no matter where you live, Wurlitzer is no farther than your nearest mail box. Send coupon today. uild ‘Sent id for $2.00 > = | m Make $15 to $25 a Day! THE RUDOLPH WURLITZER CO., Dept, A177 Wanted at once—150 live sales- 117 E. 4th Street, Cincinnati 120 W. 42nd Street, New York op Lay n - y*% - --. 700 W. Jackson Blvd., Chicago 250 Stockton St., San Francisco apply. $90 to $150 a week for the right Send me your new catalog with illustrations in color and fall i and lanterns ever descriptions of all musical instruments, also details of the hae aon Se i Wurlitzer Free Trial Easy Payment Plan. No obligation 300 Candie Power of Light Mews at a Cost of 1-8c Per Hour! ° a wera Quicklit” Lampe and be ste maeeh like city ene. Address — 3 feature! gl 5 GT PO a ET ee LD QUICK! for Sa” om aa ( State mumcal instrement in which you are interested.) and ba The Kudoiph Wurkizer © gud big s., All free and Copyright 1922, ur . Please Mention Popular Mechanics

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136

S Easy and Economical UILD your wireless station. on the ABC sectional sys- tem. Start with just the first UNIT —(a complete receiving outfit in itself.) Whenever you wish, add other ABC UNITS —just like a sectional bookcase —without discarding a thing! Ask your radio or electrical dealer about this exclusive fea- ture of ABC UNITS. JEWETT Mec. CORP. Canadian Pacific Building New York

From H-P. Pulls 234 All other sizes Lower Write for big FREE Catalog O9e:

* Direct From Factory WITTE factory price direct saves you money. New quotations are from $20 to $400 less than they were last year. All sizes and styles cut in proportion, including Leg Saws—Tree Saws —Portable Cutoff Saws and Stationary Buzz Saws. . ° Specif hs Lifetime Guarantee 3y oni we will send catalog and lowest price—CASH or EASY TERMS, as you wish. WITTE ENGINE WORKS 1744 Oakland Avenue, Kansas City, Mo. 1744 Empire Building, Pittsburgh, Pa. |_ =

Pittsburgh | $44.95

POPULAR MECHANICS ADVERTISING SECTION

Catalogue Te FREE catalogue tells you the kind of a Wire- less Telephone to own, so that you receive in your own home all the latest news, music, church services, lectures — everything broadcasted throughout the United States. Every home will soon have a wireless telephone outfit. We now offer complete outfits from $! 5 up. Everyone interested in radio should see our low prices on yarts and accessories. Write for this book. Learn about he miracle invention of the age. Easy to install, assimple to operate as a regular telephone. One copy of this booklet is yours, FREE, Write for your copy. Address Dept. R-6 Montgomery Ward & Co. Kansas City Chicago St. Paul

HIGH GRADE WIRELESS| Head Receivers, Microphones, Keys, Jacks, Plugs, Etc. ramen ty eo COMPANY

STATE AND 64TH STS. CHICAGO, U.S. A. |

caeauuadt? FREE TRIAL—EASY TERMS i Your choice of all STANDARD MAKES, UNDERWOOD, ROYAL, SILENT SMITH, Se Rebuilt b: L. C Self-starting REMINGTON, ete, the Famous ** - Guaranteed ¢ as new, Time payments or rentals with pects pur. west cash prices. chase _ privilege, Largest stock Write for special prices and term<« YOUNG TYPEWRITER CO., Depot. 356 CHICAGO

GALENA PATENT WICKEL DETECTOR tur ano sing 4«©60 RADIO we DETECTOR This is th« sma liest and lowest priced de

tnings a& NICKEL HOLOER w ell and AND BINDING better than POST many$5.00)

detectors H as cou ety ior sotio Dase: all metal part LN ba ~~ ans nickel plated ;fur nished complete with galena crystal. Study flustration and notice new features. Note particularly patent nickel detector cup and binding post. Size 14%x1% : xlinch. Sent prepaid anywhere. Price complete If habe build your own radio set you must have the RASCO catalog contain'ne 185 illustrations and 50 vacuum tube connection diagrame—the greatest collect published in any catalog . Catalog contains the greatest assortment of parte and rey materialsin U ‘BS l5c: n stampsorcoinforthiscatalog. “Rasce Has It RADIO SPECIALTY COMPANY, 98E Park Place, N. Y. City

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POPULAR MECHANICS ADVERTISING SECTION 137 To get the most from your Radio Set use “A” and “B” WESTINGHOUSE RADIO W BATTERIES W The Westinghouse “A” is made exclusively forradio. Its heavy plate and separator insure long life. It furnishes just the type of strong, steady, constant current of low volt- age that radio reception needs. It will stand continuous use without growing “tired.” The Westinghouse “B” is the best answer yet found for “B” battery problems. With occasional recharging it will be constantly full of energy, and will last indefinitely. It is noiseless, clarifies the signals, does not polarize. Its adjustable contact gives adjustable voltage by which you can take the howl out of your vacuum tube. Don’t let inefficient peg > your radio pleasure, Get Westinghouse “A” and “B” from your radio dealer or the nearest Wectantene Battery Service Station. Adjustedtothe Second 21 Ruby and Sapphire Jewels Adjustedto Temperature 25 Year Gold Strata Case “The best Westinghouse can build.” Adjustedtolsochronism Your Choice of Dials _ Adjusted to Positions Unctuding Montgomery R. R. Dial WESTINGHOUSE UNION BATTERY CO, Row dens in Thin Cases Swissvale, Pa. —— FF How to Get Rid of Moles | A simple, safe home ome aA 15 years’ success in my Moles (Also BIG Growehs) Dry Up. ‘ Ask for Free Booklet of Fall Particulare Only One Dollar Down will buy chis masterpiece of watch ; manufacture. The balance you are allowed to pay in WM. DAVIS, a. D. emall, easy, monthly payments. The Burlington —a 21- ma 124-5 Grove Ave., _ Wood bridge, N. J. Jewel Watch — is sold to you at a price much lower than that of other high-grade watches. sides, you have the D EAFN E ~ os I ~ I selection of the finest thin model designs and latest styles M MS E RY in watch cases. Don’t doer pe ?? the FREE Watch I know because I was Deaf and had Head Nolses for Book and our SPECIAL OFFER over 30 years. My invisible Antiseptic Ear Drums re- stored my hearing and st Head Noises, and will ° e do it for you. They are Tiny Megaphones. Cannot be iloThis 4, seen when worn. Effective when Deafness is caused by Catarrh or by Perforated, Partially or Wholly Des- pecial Offer, lasts troyed Natural Drame. Easy to’ put in,easy to take out, Are ‘Unseen comforts.” Inexpensive. Write for Booklet and - my sworn statement of how I recovered my hearing. — . Get the Burlin; Watch Book by sending this coupon. he A. 0. LEONARD, Suite 226, 70 Sth Avenue, New York City Find out ota oun special ~ which j is being made for only a -y— time. You will know a great deal more about watch buying when you read this book. You will be able to ‘‘steer clear” of the over-priced watches which are no better. Remember, the Burlington is sent to you = soy Sue Dollar down, balance in small monthly paey- the coupon for watch book and our special offer TODAY! Do not delay one minute! i rh Burlington Watch Com Bettas io Ss Mama Bled, Chae Please send me (without obligations and prepaid) your free book on watches with full explanation of your $1.00 down offer on the Burlingron Wank. UE ————————— eee SaaS _ iNaMme Se, Me Address -————— —————— ———————~-—------—— -_-— | Please Mention Popular Mechanics POL ST, u2

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138 POPULAR MECHANICS ADVERTISING SECTION Evinrude Outings No. 3—Hunting the wild water lily 679 Evinrude Bldg. 69 Cortiandt St., New York, N. Y. 780 Commonwealth Ave., LA Mass. 211 Morrison St., Portiand, Exploring —1922 Style! Prospecting strange waterways—seeking new fishing grounds and camping places—seasons at the waterside offer scores of added joys when there is an Evinrude in the family. Just a twirl of the flywheel and away you go. Swiftly, too, for only heavy, built-in engines equal Evinrude’s farcous power and speed. Two Evinrude models—the Standard, for rugged, year ’round service; or the sportsman’s Lightweight, weigh- ing only 50 pounds complete—are on display at your sporting goods and hardware dealers. See them, or write for free catalog describing the Built-in-Flywheel Magneto, Tilt-up Attachment and other Evinrude features. EVINRUDE MOTOR CO. . Milwaukee, Wis Distributors: 440 Market St., San Crensteae. Come Standard and EVINRUDE iis: DETACHABLE MOTORS FOR WATERCRAFT Old down Canoes O steady that it rides rough water with ease—so light, that it answers every pressure of the paddle 80 strongly built, that it lasts for years—that's an “Old Town Canoe $54 up from dealer or factory. “Old Towns” are the lowest-priced canoes New 1922 catalog shows all mod ‘els in colors. Free. Write forit OLD TOWN CANOE co. 1266 Middle Street Old Town, Maine, U.S. A. because it is built on sound engineering prin- ciples all through. Play Safe in Buying a Row-Boat Motor you can't afford to take any chances. No matter what style of motor you require, there isa _ \) isconsin tachab! ee Row boat MOtOr thet will suit you. For six years this standard little motor has been making § GOOD under all conditions—in the hands of thousands of users. And no wonder, when you examine its mechanical construction. It has a number of exclusive features that you should know about. Write for catalog TO-DAY. WISCONSIN MACHINERY & MFG. CO. 19 Minor Street, Milwaukee, Wis, Catch Fish, « Mink, Muskrats ete. , in large numbers, with our new, fold- ing, galvanized Steel wie Traps. They catch them like a fly-trap catches flies. Made in all sizes. Strong and durable. Write for Descriptive Price List, and our Free booklet on best bait known for attracting all kinds of fish. J.F.GREGORY, Dept.24, LEBANON, MO. f Money Saving argai ns B Bargains fi ns, oh Gohing tackle und citer ator ee qe me await those ot eet 3 or this big, beautifully illus trated free catalog. : Baler nen- boas we «h sationally low prices. Write a now for your free cop oe eaten: — Ling = Compeny G 0°”? 34 West 28th St., New York \. ea Build Your Own ies LOWEST PRICED and BEST BOATS 'e the World Built by BROOKS SYSTEM Broots K. D. Outfits make & Building a pleasure. You can ea ly and quickly assemble your ow boat by using our simple meth Let Us furnish you at trifling « 34 our instructions, Full Sized / 14 terns, a K. D. Outfit with parts 2 ready Shaped and fitted. or bu you a Completed Boat Brooks Models speedy, staunch and seawort! y.T of satisfied patrons. Get our prices on C building, they are lower than eve pend 10 cents for BIG catalog fu jlof information for BOA buyers. Brooks, Oldest Established Boat Builders BROOKS MANUFACTURING COMPANY Address Cat. Dept. Saginaw, Mic!

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allt nd ht TS tn ict

POPULAR MECHANICS ADVERTISING SECTION 139 ose FOR THE BASS SEASON

“‘Abbey’”’ Hard Braided Silk Casting Line Steel gray in color, smooth, firm and free from —~ 9m fections. One of our best lines for bass, pickerel or muscallonge. Fifty yards on spool, two connected. DOG. «i usted Racktnaiinkbs enemas F G H Tested strength, lbs............... 28 23 18 Retail at, per spool. ae $3.85 3.50 3.25 Ask your dealer for the famous Abbey & Imbrie tackle. Catalog on receipt of 10 cents Established ABBEY & IMBRIE This is Our Division of Baker, Murray & Imbrie 102d Year 97 Chambers St. New York

AMERICAN Dept. 614 2047 W. Chicago Avenue, | Only $45.00 For This Job Complete

ee, Than » Mienhant Hide

MOTORCYCLE BARGAINS Save 25% to 65% on Slightly used and Rebuilt Motorcycles, Side Cars, Johnson Motor Wheels, Evans Power C; ies, Bicycles. Send for Free oney Seving xp wenn pb mL hi ha c etc. MOTOR CYCLE Co.

board, Not (if, smetal parts, Sood arts, Rit hosts Gomnatete iT radiator made 5 Designed low Fish lack of wind i. . Price set ap$90, farther on request-} Auto Co. Dep. 120, Louisville, Ky.

Because it’s built that way Write for Complete Catalog RACINE BOAT COMPANY. Dept. 61 Racine Wisconsin

s Seturday Seans’s $ Sauer June 3rd “Our Boy Scout troop on 16 mile ry ride today. Frank Nortoa got a punkture. I had tube of Neverieak Tire Fluid in my first aid kit. Squeezed Neverieak im his tire and stopt the leak instantly Neverleak has saved many a delay. It's the old favorite —— Sacistactory or money back. 25c a tube at all bicycle and repair shops. PF REE—Send for handy Neverieak Pencil Clip. in attractive colors, holds pencil firmly tn place. BUFFALO SPECIALTY CO. 102 Ellicott St. Buffalo, N. Y. hy NEVERLEAK TIRE FLUID. “HEALS PUNCTURES ON THE RUN.”

Sa

Over $200 Profit Weekly Above Expenses All over the U. S. and Canada, we are establishing vulcanizing ser- vice stations. We instruct you and furnish the most modern methods and equipment— THE ANDERSON Known the World Over We have 34 schools in U. S. and4in Canada. One is near you. School pays you $5 per day while learning to oper- ate the station which you start in your town or elsewhere on small capital. Write for full particulars TODAY. THE ANDERSON STEAM VOLCAINEER co. Menutactwurers of Modern Tire ® 103 Williams Bidg.

epair Equipment indianapolis, U.S. A.

THE MOTORCYCLE FOR TODAY'S DEMANDS LOW PRICE. Cleveland is the lowest-priced. real motoreycle. Economy. Cleveland goes 75 miles to the gallon of gas—15,000 miles on one set of tires. Strength. Cleve- land uses Mo-lyb-<Jden-um steel. Safety. Low saddle, perfect balance, light weight. Write for catalog “M."" If not sold in your city, recom- ven rte mend a dealer

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140 HIS INSPIRATION They met after years of separation. As boys they had attended the same school. One, was a leader ineverything worth-while. He could out run, out swim and out ride any boy in his class. The other was of sluggish mind he didn’t de velop an active body. He w as none too fond of the great out of doors and the sturdy sports of boyhood These two boys grew up—then went different ways. Years passed — they met accidentally on a busy thor- oughfare in a large city. sad but wonderful contrast Each had developed true to bovhood form. One was the picture of robust manhood and healthful happiness—a leader in business—a leader of men—a suc- cess. Over the desk in this successful man’ private othce was a little framed photograph, showing him as a boy during his school days—mounted upon a Dayton bicycle flashing across the finishing tape a WINNER. This picture had been his inspiration for because } years, Dayton Bicycles **Leaders Since Your Dad Was a Boy’’ have been the selection of winners since your Dad was a boy. Made complete in our own enormous factory; manu- factured by men who have given their brain power for years in assuring every Dayton bicycle owner that his is “‘a bicycle for champions.” These men are working for you Do this right away: Get our new booklet —“ How to Choose a Bicycle.” It will be sent free and postage paid if you will use the attached coupon. This booklet tells a lot about bicycles in general, and the Dayton in particular Write for it NOW. Use the coupon. Cycle Division The Davis Sewing Machine Co., Dayton, O. FILL IN— CUT OUT— MAIL TODAY The Davis Sewing Machine Co., Dayton, O. Please send me, without obligation, your booklet No 28, “How to Choose a Bicycle” and the 1922 Dayton Cc at alog. Name St. and No City and State. Age POPULAR MECHANICS ADVERTISING SECTION TUBE WITH EACH TIRE FRE SENSATIONAL CUT IN STANDARD TIRE PRICES! Two used tires for less than the usual cost of one, and a free inner tube with each tire! No double treads or sewed tires. Our big volume means best_tire values. Act now and cut your tire cost in two. Thousands of steady customers are getting full mileage out of the - & 000 MILES tires and you, too, can get : You can see the mileage in our tires. Order and prove it—but order now! This is @ special lot selected for record-breaking sale. Supply limited and oin. ouble quick £0104 OTE THE BARGAIN PRICES ON TWO TIRES OF SAME SIZE 2 Tires $21.45 22.45 23.45 24.90 1 Tire $7 8. ee CREA am GOGO or orc Arrange oe &S 25 35 2 45 10 65 11.85 12.45 13.25 14.95 SEND NO MONEY! Shipment C.0.D.express or parce! post. Examine tires on arrival and if not fully satisfied return same at our expense and your money will be promptly refunded. State ‘whether straight side or clincher, o tT ORDER NOW! yp TIRE & \ Sunes COMPANY 2721 Roosevelt R Chicago, Mlinois “JIFFY CAP” Make Full Time Money Selling a100°,, Ford Necessity—Not Just an Accessory! Every Ford owner avoids the disag greasy struggling sold" prospect because he five minutes of sweaty gritty or crossed threads that he spends f gh peas tank The Jifty Cap brings smiles to his face as y demonstrate it, and his hand is in his pocket before f talking This articie sells for $1 Write toda for our active eelling pla A samy “ ty $1.00, CHICAGO AUTO SPECIALTY CO. 1349 Bauwans St. Chicago, M1. DRIVE 100 TACKS AND SAVE $25.00 ing $ in back irtain. WEE boosted ehete aians lie s. Ford R vadater $8.20, Touring $9.95. Chevrolet, D de gg seat hoadster 310.4%, Touring $13.05. Al ms De up er ‘ s $16.50, with plate giass | Side Hack Curtain likeeut, Ford $2. Ot her care Delivered $3 extra. Ford Side Curtains that op w Roadster $10, Tour ns 316, Ford r , my reain 1s, Roadster $6 $8.9 Othe urs $11.50 up. ord Seat Slips, I Doe r $3.15, Touring $6. i te ee Sh Other cars $4 to $32 Ford Cust be same as car mfrs. use and guaranteed to fit. Printed tructiona given how t rly five model and year of your ear P Fae Wigan d i ship C.O.D., or send for eamples. Pr we include War Tax Paid and delivered at AUTO EQUIPMENT co. 32 Cana! Street. Cincinnati, Ohio $45 Buys This Motor Cycle It's a Harley-Davidson, 16 - tw magneto and clutch, It werand can be » and go on the open r «'y at a d which thrills, This is one of hun dreds of bar- gains in use T t Send f f big bargains ond tr motor cycles Repairs s exchanged. Send us your machine to be overhauled. Oliver Cycle and Motor Co., 1045 N. Grand Ave., St. Louis. Mo. RELIABLE —— MAKES that you can DEPEND on. Enjoy the glorious experience © going wherever you like—-whenever you like. The price is within your means—35% to 50% less than oth ers. These machines are slightly used, thoroughly oan d or rebuilt. Send for catalog MYEROW BROS., 258 Columbus Ave, Boston, Mass.

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hio

POPULAR MECHANICS ADVERTISING SECTION 141 AAA

World’s Best Roofing at Factory Price Don’t buy Roofing of any kind until you get our big Free Boof- ing Book, describing full. line of Edwards Famous “Tightcote” Jalvanized Roofings, Sidings and Ceilings, and our lowest faco- tory prices. Then see for yourself how much we save you by selling direct and saving you all in-between dealers’ profits. EDWARDS : Metal Shingles e*_,process.

"Gergen. sizes of Portab! iegeest Wide Sorgen. of +, bt ie j " ue - 4 Wt dy sarees FREE for | & THE EDWARDS MFG. CO.. were 600-650 Pike St., Cincianatl, O. oe

| MAKE inTO So YOUR FORD Tuis SPORT CAR ther types down to $ Famous sure Gt. Aat+Fat life-size patter and simple lastrestions _ all details, You enn easily convert oe ‘ord into thie fest, saucy fe bundreds heave done with a few Bhan worth of | « materi! from the hardware Pal store. No need to! ay up the car. The “PAL” with conical os patterns Pressed Metal Streamline Rear only $6.40 delivered. Built low, rides wonderfully enay. Order NOW while we can make good de- livery. Send Se coin for vlwatrated preapetine <fS of Sport Bodies ,” - a Co., 84K

Keen, Classy Up-to-the-m inute Topeana “Gosum"™ Windshields. &

$10. 00 A DAY PAID Weekly to one man in each county taking orders for COFFIELD TIRE PROTECTORS. They — punctures, blowouts, stone yruises and fabric breaks. Double tire mileage. Pay for themselves on first tire; used over and over again. . Pure live rubber; no metal, no fabric, no friction. Easily applied; no cement or tools required. Nothing ke it. Absolute three-year guarantee. Users are boosters niimited demand. Every truck or auto owner alive prospect. No capital required. Checks mailed weekly. Write to COFFIELD TIRE PROTECTOR co. | 309 Court St, Dayton, Ohio EARN $75.00 to $150.00 A WEEK y Repairing and Rebuilding TIRES with the createst P, mey Making VUL ZER ever placed on the market. Does meee Week at One Third the usual Coat of Repair. You can guarantee Repair Work to outlast the balance of the tire. Complete IlMustrated netructions with each ma- say Wwe = yes how and

2 today for Circular Ne. BBV. The Adams-Barre Co. 1248 North High St. Columbus, Ohio

To Work! I YOU go or come from work in darkness—the Delta Electric Bicycle Lamp is just what you need. Every bicycle should be equipped with thislamp which—with itsstrong, pierc- ing beam—protects against accidents. No. 80 solves problem of rear red light —complies with all the laws. Mounts left side front wheel under axle nut No. 27 mounts on handle bar. Ask your dealer, or either model sent prepaid for $2.25 complete (less Battery). . Delta Electric 5 100 DELTA BLOCK MARION, IND Standard Makers of Electric Lante Automobile Spotlights, Bicycle Lamps Flashlights and ali kinds of Dry Batteries New York San Francisco Winnipeg

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142 POPULAR MECHANICS ADVERTISING SECTION Miracle No. Radiator frozen. Result—steady leak in lower left corner. Couldn't spare car for expensive repairs. Poured RADIATOR NEVERLEAK into radiator and completely stopped the leak. This happened three months ago. Repair solid as ever Time lost—5 minutes. Cost—75c. If your dealer hasn’t Radiator Neverleak, send 75c for full size can. Guaranteed satisfactory or money back. Carry a can for emergency. Buffalo Specialty Co. BUFFALO, N. Y. “Oh Boy! 25 MILES PER HOUR! is record of our stock using our special 1922 motor. pan Bo can assemble this car. Send 30 cents for plans, instructions and price list of parts. - SYPHER MFG. CO. 146 Sypher Bidg. TOLEDO, OHIO _ LEARN HOW TO GET FREE TIRES FOR YOUR OWN CAR! 1000 more Car Owner Agents wanted at once. Write for full conditions on which full set of famous new proc ons Full Mold Oversize Multiple Weave INTER- NATIONAL Tires given FREE to Agents in Exclusive territory! Rock bottom wholesale prices and free wonder- ful fast selling plan given you right from the start. All tires 8000-mile guaranteed Non-Skids! AND READ THIS GUARANTEE! To any person returning an international tire to us ace om panied by a sworn affidavit that it did not give r other make leas of price, we wit replac ‘such tire ‘absolutely free ‘of charge! INTERNATIONAL TIRES PIRON (No-Rip) TUBES We need not remind you that this offer of F RI L rIRES 8] to live agents, exclusive agency, biggest di ute ane ironclad guarantee will get us the required scents almiomt overnight Get all the details now! Be in business f yourself Tie u ir own territory with these FREE TIRES and your first orde r. DONOT DELAY OFFERIS LIMITED: All in r as t. this great FREE TIRE and AGENCY OFFER ie sent you fre together with bank references. Write us for them AT “ONCE! Dept. 109 INTERNATIONAL RUBBER CORPORATION, Grand Rapids, Mich. TWO-YEAR GUARANTEED gee BATTERIES SAVE 50% | | Vamous “Royal” Batteries- highest quality made—now selling direct from factory to car owner. You save half. We ceive written 2-year guarantee—longest on any battery Big responsible organization backs guarantee. Batteries for any car, tractor or gas engine. Send nomone Save time. Order Yirom this ad. Bat- tery, fully charged, shipped immediately— by express C.O.D. You run no risk. Our loca- tion same for eig! t years. References: Nat'l Bank o {the Republic, vr or Bradstreet. f you want descrip antieeni Ria Fr ee Booklet | tive matter first, send SPECIMEN PRICES for free booklet. Givee full details of this eu Ford-Dort-Chev.518.80| prion Deterr. Gel tis bookies betore yx uy any battery ive year Overtand-Buick 21.85) and mode! of your car. . Jame Maxwell-Dodge 25.60) «-£€ BATTERY CO., Dept. 108 me 50% saving on allears | 646 N. Michigan Blvd., Chicago Largest Exstucive Mail Order Battery House in America mbers of Chicago Association of Commerce EARN $150.00 A WEEK BY YOURSELF with a DUNCAN VULCANIZING PLANT Includes every tool and vulcan izer for a high-grade repair bu ness. Will handlej the work of six men. We start you in business for as low as $125.00, balance easy monthly payments, and teach you approved factory metho ds of tire repair, at home or in or of our own repair shops, FREI also pay you $5.00 to $6.00 per day for the last eight to ten days, when you take the cour in one of our repair shop schox in connection with the purchas: of a No. 10 or No. 3 Equipment Can you beat this big char to own your own business upo 80 sinall a capital? The Duncan will cure two or three times as many tires a day as any other mou It is the only mould made that will operate with sand bags equally as well persists M. DUNCAN COMPANY Offices and Factory: 341.349 East Ottio St. Dot's, Chicago, U.S.A. Make Full Time Money Selling a 100°% Auto Necessity — Not Just a Rich Man’s Accessory Every car owner is a “sold” prospect beeause he realizes his need ! Tr an accurate, easy, clean way to save his tires by knowing th they have just exactly enc AL air Hurry Accurately” You can take h rder for thie & wantesd » ney back VIS- IBLE TIRE TESTER by a simple de ition, Sample Sels 25. Write today for our attrac tive selling pte $3.00 1349 Bauwans S i Chicago Auto Specialty Co. Inc, '°*2,Bauwens St. mo tole BIG PAYING HOTEL JOBS OPEN to trained men and women; we train you by mail; get 20 years’ hotel experience in few months; earn $3,000 to $10,000 a year; fine liv work is fascinatingly interesting; quick adv ancement. Send for FREE BOOK ¢t LEWIS HOTEL TRAINING SCHOOL, Room 329, Washington, D. C. CUSTOM TAILOR MADE nal Made in our custom sho} after your order is receiy 4Qe2d ue We ship ordinarily in 2 or ‘ot days. Perfect fit guarante: Post Paid when correct name, year a i model of caris given. You ¢ easily apply it yourself. We furnish instructions anc all ne sary tacks, welts and fasteners. Our catalog No. 10, wi! samples, is free for the asking LIBERT Y TOP & TIRE CO., Dept. E-7, Cincinnati, O SEND for the INT os lca CATALOG Factory Our net price ! to Con- © fauto wom + sumer plies direct— Wholesale rice PAY Ss t save >? ONLY money ONE uying Direct (ror PROFIT Factory For Ford and Chevrolet—prices from $27 International Body Works ** eae “Chicago, Til. |

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POPULAR MECHANICS ADVERTISING SECTION 143 A Torch with Hundreds of Profitable Uses Torit Acetylene Torch No. 13 PRODUCES A HOT INSTANT FLAME For radiator and battery repairing, for soldering electrical connections, pots, pans, etc.; for preheating fenders, tempering tools, joining brass tubing, remov- ing rusty bolts and nuts; for light brazing and hundreds of other uses. A Practical Outfit for Every Mechanic Uses Acetylene Gas Only Complete with 4 different tips and soldering copper, rubber tubing and tank connection.. $7.50 ST. PAUL WELDING & MFG. CO. 177 W. 3rd St. ST. PAUL, MINN. MOTOR REPAIR (ops BOOK FREE jai Why spend dollars, when you BOOK a: can make perfect Automobile and Household repairs quickly and easily with SMOOTH-ON IRON CE. MENT No. i at a few cents’ expense ? Write for this book and learn how—it’s Free. Smooth-On is sold in 6 o2..1 0h. and 5b. tine by Hardware and Auto Supply Stores SMOOTH-ON MFG. CO. Dept. 37E Jersey City, N. J. SMOOTH-ON IRON CEMENT N° For Motor and Household Repairs Make Your Bike t & MOTORCYCLE Make your ‘‘foot-power”’ bike a depend- able. easy-running, light-weight motorcycle at small cost. You can doit yourself with the SHAW MOTOR ATTACHMENT Compact. Easy to attach. No special tools required. Battery or magneto. Thousands in use. Write at once for free book, prices, terms; also about Shaw Motorbicycle. Write for SHAW MEG. CO. FREE 95 to 125 | Miles per gallon! Please Mention Popular Mechanics Afternoons yy 7 U Ss 2. What fun to be able to ride wherever you like, in a machine you can afford er 60 to 70 miles to the gallon, all upkeep corre- spondingly low, no garage rent. Comfortable, easy to ride and handle. Cheaper than carfare to ride to work. Write for literature covering the 1922 models. Numerous Improvements. Two brand new models. Substantial price reductions, Address Dept. 37 Hendee Manufacturing Company Largest Motorcycle Manufacturer in the World Springfield Mass.

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144 POPULAR MECHANICS ADVERTISING SECTION Patent Pending The F-B-Oil-Saver Does All These Things or Money Back eg gery Saves a to 50% of lubricating oi Reduces carbon. Ends spark plug fouling. Keeps oil dirt-free. Reduces wear—improves lu- brication. Saves gasoline. Stops all oil-leakage. Sells for $ 152 Eventually on All Fords Dealers and Agents Make $10—$30 a Day! Dealers and agents make won- derful profits selling the F-B- Oil-Saver. It saves more money for Ford owners than any device ever brought out. Note at left what it does. A Sure Sale Nearly Every Time Agents close from 50% to 75% of all prospects talked to. Just put it on a Ford. Show the owner what it does. Only an No instant to demonstrate. tools, no installation costs. Hundreds of agents make from $10to$30aday. No mechanical ability needed. The F-B-Oil- Saver sells itself. Satisfaction or money back guarantee, on every sale. We back you on that. Dealers make big money, too. All Ford owners want this device. Write for our proposition. State whether dealer or agents rights wanted. Don’t wait. going fast. Good territory is Write at once. PENINSULAR CORPORATION, DETROIT, MICH. 1148 Penobscot Building, Dept. E End Lighting Troubles with “Union” Fuse Junction Block Prevents wires burning from grounds, or lamps flickering due to loose connection. Cuts repair bills. Eliminates fire danger. Permits use of standard lamps for pa ht or dim lights instead of naate onal wiring. Sent post ai if not datistac story. Write for booklet. 1503 W. 15th St., Chicago Ford Owners riced double-flament type. Easy to install. No d for 2. 50 if not at dealers. Money back CHICAGO FUSE MFG. CO. Eastern Branch, New York Seute your old Ford or Chevrolet Chassis with one of our new distinc- tively modern bodies. Speedster designs. ritory open for live _— dealers and FEDERAL 1 1424 S. Blue island A’ ve. Federal Auto Beay Cont: Torento, Ont.; Campbellton, N. B. FORD and CHEVROLET SPEED BODIES Dealers MAKE DRIVING A PLEASURE Up-to-d: te Roadster, Touring ya a Ford bodies as low as $29.50 and i : a Make rea profits. Dtrect OTOR SU SUPPLY’ Cco., Inc. Chicago IAN DISTRIBUTORS $20 Puts an HB Charger in Your Shop Balance in easy monthly payments. HB Battery Charging will carry your overhead. WNo repairs, no renewals, steady, money-making service. Costs you 4c to 12c)per battery, customer pays 75¢ te $2.00. Quicker, better service with an HB, at lowest cost, means Big Monthly Profits for you. Sizes for 8, 10, 16 or 32 batteries. back guarantee. Seld on money- Let us recommend size to fit your needs. Write to- day. Ask about HB Air Compressors, Motor Grinders, Tire Buffers, Lighting Generators, Ball Bearing Motors, etc.—all sold on easy payments. Equip your shop to make more money. Write us. HOBART BROS. CO. Box M6 TROY, OHIO Charging Pays $3000 a Year) Battery $1500 to

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$$ ® ind its

POPULAR MECHANICS ADVERTISING SECTION 145 TireAgents Make $1,00 1,000, Easy! From Skidmore of Ohio eet Your Job Make big money on side. Turn spare hours into cash with my new home outfit. Vulcanize automobile tires. Mend tubes. Repair um boots and rub- r goods of all kinds. Do thriving neighborhood bus- iness. Many men started economically. L. D. Weis, O., running better than $15 daily. c. L. ) W. Va., averaging more than $47 day during past six weeks, and so on, Little Money Starts You! Write me. Get my help. Begin now. Season just opening. Tire repair work galore everywhere. I furnish everye thing, including machine, tools, clamps, materials and direc» tions. No experience needed, Everything plain and easy. Allinstructions learned in one evening. Can't go wron Marvelous proposition. Wm. Howe, Mo., says: “Biggest li tle machine I ever saw.”’ Steve Marchand, Texas, writes: * having wonderful results with your machine.” Others = making extra money—you can too! Mail Postal To Me, Tonight! Get full details. It’s a proposition you can handle. Place ma- chine anywhere—garage, shed, basement. Has wonderful capacity. Work is easy, pleasant and fascinating. Starts you in big paying business, Puts you on road to independence, Send quick for full information, Address me personally, M. Haywood, Pres, Haywood Tire & Equipment Co. 974 Capito! Ave. Indianapolis, tnd. CORONA CAR Co. The Sport Car DE LUXE TheCarforYoung America Eighty Miles totheGalion & Day's Ride for a Dollar Half the price of a Flivver 1912 SOUTH WABASH AVE., CHICAGO SAVE MONEY Buy your automobile battery direct from factory—highest quality made. You save 50%. Globe Batteries For the past two yous Globe Batteries have been sold to some of t est users of automobile batteries in Chicago. ames of these satisfied users furnished on request. These same batteries

listed below. Save time. Order from this > Batteries shipped immediately—express CO. WRITTEN TWO-YEAR GUARANTEE ; 6 VOLT 11 PLATE | 12 VOLT 7 PLATE Or Overland, Elgin, Ford, | for Dodge, Maxwell, Crow- Scripps- Booth, Grant, Dort, sris- Sanen. Hupmobile, poy Elkhart, egal, Franklin, Bris Usual’ Cost $32.00. $12.50 | $52.00" Our Price” $18.00 om? Price 6 VOLT 13 PLATE GLOBE STORAGE BAT- TERIES L4 ty RADIO

for Oakland, Velie, Nash, Studebaker, M: uxwell, Cc mee, vrolet, Mitchell Hud 20, Paige, an gent 4 ‘50. vow 45% Cisne “Goa. 36 40 bt ¥.+4 6 80 4.50

Shipped fully charged ine tor installation Begin now to get 100% battery service at half cost, by sending us your order today. GLOBE BATTERY COMPANY Dept. P, 1219 S. Wabash Ave. Chicago, Ill.

AV AT ahacte! "4000AYear Make Big Money without risking one cent. I'll start you as I have started so many others in a business of your own. All or part time. The MELLINGER PLAN is revolutionizing the tire business. No capital or experience needed. 1 Guarantee Your Profits Let me prove that you can earn from $100 to $400 a month and more Hundreds, discontented with mere jobs, got this MELLINGER PLAN and today are making big money GUARANTEED BY BOND 10,000 MILES Mellinger Hand Made, over-size Cords and Extra Ply Tires — the finest, most serviceable tires made i GUARANTEE MILEAGE—some do not. Whether you want CASH or guaranteed mileage for yourself at LOWER WHOLESALE PRICES, write me today. Get my inside figures and discounts. My new low getces amaze everyone. Better ires for less money makes business

rollin. One Billion Dollars will be spent ) for Tires in the next few months. Tires SF are shipped prepaid on approval. ge Salesman Kit show- actual sections of tires, fobrie, rubber, cord, tubes, etc., in substantial portfolio < Shows secrets of tire con- Le struction. Sent free if you're in dead earnest. Tweedie of Maine selis $1,436.00 in few short weeks; A. M. Amigo, Santurce, P. R., sold $4.024.00 in 7 months; Hinchcliff, Pa., Sells $1,500 first month. Others do as well. If You Own a Car, Write Me Quick! Don't buy anybody's tires until you see these amazing values. I appoint only one agent in each locality. I will make you a surprising offer that will give you aeet of tires FREE. Be first in your locality to get my confidential offer. Mail Coupon right now. GET MY FREE BOOK The most fascinating book you ever read. Wonderfully illustrated. Reveals in detail the remarkable Metlinger Plan that has proven the golden key to thousands, tells all about tires, facta of con- struction, how tires are sold, explains manufacturers’, jobbers’ squalene” profits. Don't Wait—mail coupon today — Cet this bie Free book never read anything like it. It's Free to you —simply send coupon today.

MELLINGER TIRE & RUBBER CO. 1018 Oak St, Kansas City, Mo. ee me ee B. L. Mellinger, Pres., 1018 Oak St, Kansas City, Mo. Without obligation, send me your Free Book, details of the Mellinger Plan, and Wholesale Prices and how, without investing any money, I can become your authorized agent Psa kn ctapasetepndessnsenoceestendestase Address ...... jaan ITTV TT reir

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A Friend in Need! Last tube punctured—patches won’t stick—you’re ready to start home onthe rim. Then along comes a helpful friend and shows you how to vulcanize that puncture for good in five minutes. He’ll tell you that he wouldn't take ten dollars for the feeling of security his Shaler Vul- canizer gives him and advise you to get one at the next garage or accessory store you pass. You'll do it, and next time the emergency comes you'll thank your lucky star that you were prepared, Costs Only $150 Slightly higher west of Denver and in Canada Vulcanizes boots, rubbers, gloves, coats, etc. No gasoline. Each Patch-&-Heat Unit contains its own fuel. A match is all you need. C. A. SHALER CO. 2005 Fourth St., Waupun, Wis., U. S. A. 35 MINUTE VULCANIZER VULCANIZER 5 MINUTE) Type, , = No 5S. [nd re) POPULAR MECHANICS ADVERTISING SECTION —- ROMBERG SE More Mileage’ ee ota ! : et Size- Id orNew THE foremost item to con- sider in the upkeep of your car, is fuel consumption. Are you getti every ounce of ey rom the gas you buy? There isa way | | —the New Stromberg | apne makes a slave of | Ge epioes a “‘full days’ | work’’ from every drop— makes a galion farther. It means actual econom Wier i through the saving of fuel. Tue make of your car—its e or condition cannot alter the fact that a sub- stantial saving, a notice- able increase in efficiency of operation and additional = ris evident where the mberg is installed. Made by STROMBERG MOTOR DEVICES Co. Dept. 614 64 East 25th Street Chicago, tl, y Ja 4 New TROMBERG Does it! (oy -W-3-10)-1 wae) - ADVANCE NQOR LOCKING HANDLES for FORD Closed Cars Installed quickly by anyone. They fit in pla of original handles. Ford owners deligt with them. Left handle locks automati: right handle locks with key. Fully guar teed. Agents: Beautiful eam pie pair f furnis with full particulars Canada, heck, money order or C.0 C. B. HAVEN CO., P. O. Box 129; Detroit, Mich., or V Windsor, On oe wit Autos 4, Wanted to introduce and take orders for our NEW PROCESS STORAGE BAT- TERY. Plates can- not sulphate or buckle. No expert attention required. One-half cup water every 3 months. Made for autos, radios, lighting outfits and all other battery purposes. Guaranteed 2 Years The biggest money maker and greatest business builder ever known. Write today for our exclusive proposition and low wholesale prices, HARSHA BATTERY CO. Dept. 10. 21 East Van Buren St. CHICAGO Please Mention Popular Mechanics

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OSE Sl POPULAR MECHANICS ADVERTISING SECTION 147 pone Brings Th is Genuine DIAMOND RING forl0 Days FREE TRIAL Set in Platinum § Most Sensational Ring § Offer Ever Made : Think ofit—sevenbril- — tony | steel blue genu- & by a secret process ina — Setting of solid platinum & Bet so closely . Ls that & oe, Only close inspection will _—_ . tinguish it from a Solita : valued at $350.00. Shank of ring is 14 kt. solid gold. TEN DAYS’ FREE TRIAL You take no chance—if itis not satisfactory at the end of ten > days, or if you can duplicate this genuine diamond ringinany & jewelry store for less than $65.00, your deposit will be re- & unded to you. SEND ONLY $2.00 one the ring cual gus to you in a handsome on ben. char e guarantee bond a s to quality a ¥ : ice only Bayete ance : Free Royal Bargain Bulletin. fir strates and describes over 800 special offers in Diamonds, Watches and Jewelry & which we are making this month from our $2,000,000 stock. & Address Dept. 541, ROYAL DIAMOND & WATCH rare) 35-37-39 Maiden Lane - New York FORDS RUN 34 MILES on Gallon of Gasoline Wonderful new carburetor. Guaranteed to re- duce gasoline bills from one-half to one-third and increase power of motors from 30 to 50% Start easy in coldest weather. Sent on 30 DAYS’ TRIAL Fitsany car. Attach yourself. Fords make high as 34 niles to gallon Other cars show proportionate sav iam. Send make of car and take advantage of our special 30-day trial offer. Agents Wanted. AIR FRICTION CARBURETOR CO. 3380 Madison Street Dayton, , Ohio EA VACCUa itd he For filtering, purifying, clarifying and removing im- pene from water—medicine and ALL beverages -ACCU-FILTER nickel plated, guaranteed not to tarnish, $8.00 complete. (Plain brass $6.00 com- plete) Send check or money order 5-day trial— money-back guarantee. Agents, dealers, jobbers, write for proposition VACCU-FILTER SALES CO., Inc. 134 West 32nd St. Dept. P New York City \/ RAISE BELGIAN HARES “sic SOROFITS. we PAY @ 1. 60 sorose ech Also Cavies, Mink, Skunk, Fox. Muskrat, Etc. Easily raised anywhere. 32 f Cata’ von Piisstrcted ook “COMMON SENSE RABBIT AISING quarterly ry and cites America’s leading smail stock magazine, all for 10 esas cents. A “ ws __ Outdoor Enterprise Co., 1005 0. E. BLDG bels gow and does good. Puts pep in jaded muscles. Athletic trainers recommend it for rub- downs. An antiseptic too, for cuts, scratches, skin abrasions, etc. Excellent for mouth Liberal and throat. Few drops trial bottle, suffice. $1.25 at drug- postpaid gists or postpaid. s0C, We F. POURS, Inc. ‘Absorbine J! THE ANTISEPTIC LINIMENT for A Nickel « No muss, trouble, dirt—no moving of batteries —loss of time—no effort on your part—no technical or professional knowledge needed. The Homcharger successfully meets all charging conditions, and is the only rectifier combining the following essential Homcharging features: 1. Self polarizing. Correct battery either way and it will always charge. No danger of reverse charging, ruined battery or burnt out Rectifier. 2. No delicate bulbs to break or burn out. Only one moving and two wearing parts. These are replaceable as a unit, after thou- sands of hours use, at small cost. Cannot be injured by rough handling. 3. Operation stops and consumption of cur- rent ceases immediately upon disconnecting battery. 4. The only charger costing less than $100.00 that will fully charge a battery over night. Gives battery a taper charge—exactly as recommended by battery manufacturers. Guaranteed not to harm your battery even though left connected indefinitely. 5. Highest efficiency of any three or six cell charger made. 6. No danger of fire. Approved by the Underwriters. Attention, Motorists Will charge your auto battery as well as radio battery. Send for Bulletin No. 58 for further information. F or 8% ale by all ri adio, ele -etric: al and accessory dealers, or shipped express $ pre paid for purchase price 1 8. 50 $20.00 West of the Rockies. THE AUTOMATIC ELECTRICAL DEVICES CO. 129 West Third St. Cincinnati, Ohio Branch Offices—New York, Chicago, Pittsburgh, _ Los Angeles, New Orleans, Detroit, Toronto, Philadel- phia, Baltimore, Dalias Largest pre nal of Rectifiers in the World Please Mention Popular Mechanics

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148 POPULAR MECHANICS ADVERTISING SECTION AKE$|© PerHO Hundreds of Auto Repair With a Weldene Scored Cylin-

UR your share of these handsome Broken Motor Blocks, Water Jackets, Aluminum Crank profits. ACT TODAY or the Cases, Fenders, etc., can be repaired without dismantling other shop in your neighbor- or preheating by the Weldene Process. No Acetylene. Any hood will beat you to it mechanic can do it. PROVE IT: 10 DAYS FREE TRIAL Order a Weldene Scored Cylinder Outfit The price of the WELDENE SCORED CYLINDER OUTFIT is only $20.00. It is ae ner Ce oa is no other process like it. H reds Try it on Scored Cylinders and be convinced. in repair ohope, , auto fac Pos Cusranined. . nee After ten days, if you are not perfectly satisfied that it will repair job wi it. rORDER TODAY. “ow send for free . aad we til sclend Your money aod tontemtation chasese, SOO WELDENE COMPANY Serr. OTTAWA MFG. CO. 1T41H Weed St. Ottews, Kas.- months. Buy it now! De Luxe #E™ FOIL BURGLARS Catalog Free Contains the most wonderful assortment of Watches, Diamonds and other jewelry. Send for your copy to- day. Address Dept. 532-L. Capital, $1,000,000 “The House of Quali L.W. SWEET "INC 1650-1660 Broadway New York

Make sure your home or buildings are’ Next to be robbed. Thousands of dollars recious valuables lost yearly because m ocks are worthless and offer no protectio Test your locks with this wonderful set of Ma Keys—5 keys in all, and each one different. Have . proved their power to open theusands © different locks and showed hundreds the‘ their homes and property really weren't protected. Endorsed and used by real estate rm bankers, firemen, detectives, policemen, ! owners, etc. Novel key chain FREE. Send only $1 today. Money back if not satisfied. MASTER KEY CO. 121 Manhattan Biock Milwaukee, W's

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POPULAR MECHANICS ADVERTISING SECTION 149 ITTE LOG SAW [ier Short Time Only

F. 0. B. Pittsburgh $70

Study the specifications of this Motor—Make com- parisons—You will not find its equal at . and Best Log Saw anything near our price It is built for long service. The size, 9x614x614 and the Look! See What You Get— Big Surplus Power weight, 28 Ibe., show it isnt in the cheap ——_ 4-cycle engine— weight over axle (not on

iss. It’sa W uner motor, fully guaranteed, R

1725: 60 cycle—1 phase. Has pulley, cord and plug handles)—two-wheel truck—easy to move. % Ss cm ping weight, 36 lbs ? Direct geared (no chains or belt) Lever controlled mt \ real motor—runs your drill press, small lathe, washing or clutch—Arm swing motion. We have only o1 —- og Saw , other household machinery; radio equipment, milking ma- —-Our bigge st and best (at_ advertised price hy pay 4 chine, pump, ete. $50 more for any saw. Order direct from this ad. t Lifetime guarantee—Cash or terms—Immediate Ship- 2 Send cash with order or we T : at ams ac ‘s , ‘Me $13 50 wits ship C. 0. D. if you prefer ment. Tree Saw at small extra cost. Catalog Free. ; THE F. BISSELL CO. WITTE ENGINE WORKS a ar 812-822 Lafayette St. Toledo, Ohio 1748 Oakiand Avenue, KANSAS CITY, MO. “ Wholesalers of everything electrical 1748 Empire Building, PITTSBURGH, PA.

STICK THIS ON A POSTCARD MYERS WONDERFUL SEWING AWL Union Tool Chest Co., 22 Mill St., Rochester, N. Y. Tools in Handle Mf | AN AMAZING VALUE

me the free booklet that describes completely Union Tool

Chests, including new zine covered line, for machinists, tool a ikers, carpenters, electricians, plumbers, repairmen, conduc- = _— The Awl house and general use. No obligation on my part. “ : For All PR caved ccnes dy enssesdiuhnewesksedeaeswiseel ve | A complete repair shop in itself, Sews anything heavy or light, leather, shoes 4 . aes harness, buggy topes, canvas, belts, et Si. 00 Postal. | c. A. MYERS OMPANY, 6339 Woodlawn Ave., Chicago, I.

It’s Easy to Build Things BURN YOUR NAME ON TOOLS 0 with a | wittHs ~ | » Boice Pony Bench Machine | t a ——— Six Machines in One « ARKOGRAFE does . ith « Does the hundred-and-one things so often desired, with a Protect your tools from speed and accuracy that is amazing and at a cost that is

| ’ | theft. Write any name, engrave any design ridiculously ae yw on metal ow ity as easily as writing Z I ally adapted for cutting at kinds of wood, fibrous materials, and aper wi en pencil. plete a' j soft metals up t . thick will make easy such dit 4 t operations ae outhe $3.50, a any w ~~ Int esd on n ff, r ‘on ng cabbetting «r i tenor ete ing descriptive circular f Wr jay. jf os Special attachments simp! ify p lishing, buffing ae sa ois and drilling Agents Wanted. Arkograt Pen Company o7y7_— A Ideally guited tor: ein Private Shops, Manual Trais ng Se} Cab- 895 Capitol Ave. Portiand, Oregon eee Oe ™ 7 » | inet and Pattern M ake Shops, Furniture Repair Shops, Print Sho ‘ps, =a | Contractors’ 8) pe, ot basily driven by % H. P| Motor | — | Handles 4” and 5” grinding whee , 6" saws, 6" 4 4 8" sand > ' fehcte: west Sat Fs Nota ce THE HANDIEST TOOL in » the W "ORLD

a t rated. ” tor ved. Ready to mount on separate OLSON $.- ce of Mac ‘ine complete wit? special $37 95 | 4 MAGAZINE uipment. id hu : aoc ‘i Sold on Money Sect @ Guarantes. Write | eit —_ : : ae Screw Driver . | ns TW > Lane enough to hang a door - Also ask about our Bench J. ~— Bench | — ] QESCR> “Small enough to fix a bell Mot t Driven tage | 2 - Three blades, one awl, guaranteed. Fits any M and 1-3 H. P. Bal L Bearing > common screw and makes holes. Ask you eee el es _ on Motors. | | | = hardware store of send $1.25, prepaid. — : W. Elevate, clean and grade your grain in one operation. A powerful fan {© pe = —y docs all the work. Only one moving part. No buckete, chains mt = or gears to get out of order. No inside scooping necessary. One man = can move it. Assembled or taken down in five minutes. Costs only 5 half as much yo style elevators. "FREE Bo itself in a few days. name today for FREE Bostiet deecribing the Wis Lo | FREE! Liberty Grain Blower and 1922 price offer. wi Midwest Steel Products Co., 448 wt, Baak E -, Kansas City,Me.

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150 POPULAR MECHANICS ADVERTISING SECTION REDUCED PRICES Back to Normalcy -- 20% Further Reduction SOUTH BEND LATHES Standard Quick Standard Quick Change Gear Change Gear Change Gear Change Gear 9°x3’ Lathe $176.00 $216.00 | 16"x 8’ Lathe $452.00 $512.00 11°x4’ Lathe 228.00 273.00 | 18°x10" Lathe 656.00 721.00 13’x5’ Lathe 304.00 354.00 | 21°x12' Lathe 848.00 923.00 15°x6" Lathe 376.00 431.00 | 24°x14’ Lathe 1140.00 1230.00 64-page Catalog No. 73 for 1922 sent free to any address : ESTABLISHED 1906 How to Run a Lathe A:5%peeebook. | SOUTH BEND LATHE WORKS address for ten cents, silver or stamps acce pted. 625 E. Madison St. SOUTH BEND, IND. LAKEWOOD FAN BELT FASTENERS N AKE or repair your own flat > belts for Autos, Trucks, Trac- tors,ElectricW ashersand small Shop Machinery with Lakewood Quick attachable Fasteners. T wo sizes— in. and 1 in.; used alone and in com. fl binations handle eight widths fiat belting. Simply square up ends, rivet half of fastener to each end, slot together and go, Belt can be re- moved from pulleys instantly, but can’t open in driving. Complete Fastener with rivets, 15¢ per set; 2 for 25c; 6 for 6oc; or 12 sets in neat slide box for $1.00. Specify size = }' wanted, Sent postpaid same day order received. Fine proposition Also for V-Type Belts for Garage, Repairmen,and Dealers, LAKEWOOD FABRIC BELTING & MFG. CO, 1518 W. 117th St., Lakewood, Ohio PARKS New Rapid Upright Hollow Chisel Mor- tising and Boring Machine $90 Do better work—q uicker—with this Parks. Makes mortisesof any size and kind, up to 6 in. deep. Adjustable bed plate tilting to angle of 45 degrees; can be raised and lowered to take work up to 12 in. thick. Takes hollow-chisel bits from 4 to % in. and boring — with iZ in. shank from \4 to 2 in. Operates with 1to1% H. P. Frame construction is 2in. angle steel, joints electric welded — the best you can get. 10-year guaranty, 30-day trial. It isthe well known quality CRESCENT machines that justifies you in selecting one them each time you have nee wood workin machinery and will always give you satisfact in every particular. Ask today catalog of band saws, saw tab! ‘ jointers, spepere planers, bx planers and ma ers, swing saw disk grinder. om off table f chisel mortiser, variety wood w« er, Universal wood workers. THE CRESCENT MACHINE CO., 93 Columbia Street, Leetonia, Ohio LATHES 9 to 18-inch Swing List price $'45and up accordin¢ to size. When ready to buysend for Lathe Catalog and pric« W.F. & John Barnes Co. 100 Ruby Street, ROCKFORD. IL! » MOTOR BARGAIN 4 hp. A. C., Fan-Cooled 13= Send for catalog THE PARKS BALL BEARING MACHINE CO. 1500-1540 Knowlton Street CINCINNATI, OHIO Canadian Factory, 200 Notre DameEast,Montreal . Split phase 110 volt, 60 cycle Rated 4 hp, but tested at the factory for 50% over- load. “Motor weighs 24 Ibs. bare—not a toy, but a sturdy heh. power, electric motor, suitable for operating bench lathes and -_ resses, grinders, radio sets, washing machinery, churns, cream separat Cie ventilating fans and the like. Operates at 1740 rpm. Every motor shipped has wired to it the Guaranteed for 1 year manufacturer's GUARANTEE SER- VICE TAG, which entities the purchaser to a new motor should any defects develop within a year, also to expert advice at amy time during the life of the motor. Same motor with Grinder and Buff—6 inch motor 25 00 wheel and 7 inch buff, complete with cord and plug NORTHWESTERN ELECTRIC CO., 408 So. Hoyne Ave, CHICAGO

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hat POPULAR MECHANICS ONE-HAND-y ELECTRIC DRILL Weight 3 lbs. Capacity Y% in. Westinghouse Universal Motor Guaranteed Knight Engineering & Sales Co. 30 West Walton Place, 210 W. Seventh Street, Chicago, lil Los Angeles, Calif. 4°GET BUSY” MAKE SCREENS WITH DIAMOND FREssep ste = CORNERS mortises, mitres, screws or tacks required Unbreakable’ > minutes. Big profits ty Tt Ty — Sample set by mail, 50c postpaid. DIAMOND HARDWAREMFG.Co. 224 FOURTH AVE., PITTSBURGH. PA, - Machinists & Toolmakers very tool arranged in order. No one ate mechan —— —— out one. A Gerstner Case costs n more than some a and will last a lifetime. Catalog free. TI7 Columbia Street DAYTON, OHIO TOOL CHESTS | WIRELESS OPERATORS —Amateur and Professional—need SOLDERALL—25c &. and TORCH, $1. A Paste That Turns Into Metal When Heated A match will do it, but best results can be obtained by using our new improved torch. Requires no acid or soldering iron. Joins or repairs wires, metal or metaiware, Sold by Hardware and Electrical Stores, or sent by US postpaid. SOLDERALL CO., Dept. P 129 Sussex Avenue NEWARK, N. J. Dealers Send for Quantity Pri Prices Beware of imitations with ADVERTISING SECTION 151 Send for this ~ -FREE BOOK Get this big free book that gives all kinds of valuable hints and informa- tion on shop practices. Tells you how to increase production and how to get more service from your metal cutting saws. Gives full information on selecting the proper saw to fit the job. Besides this, the book is chock full of other valuable time and money sav- ing suggestions. Learn about the Atkins “‘Non-Breakable”’ Hack Saw Blade which cuts faster and easier without breakage. When you send for your book, if you enclose 10c and tell us your work, we’ll send you a sample of either 8 or 9 inch blade. 26 % Added Service Atkins KWIK-KUT power hack saw ma- chines use 76% of the blade at every stroke and cut cleaner and faster. Other machines use just 50%. Think what this extra 26% means in a year! ““The Saw in the Shop” gives you full details. It makes no difference for what purpose you use saws, wood or metal. Send for one or more books— “Atkins Metal Saws,” “Atkins Hack Saw Chart,”’ “Atkins Metal Cutting Machines,”’ etc. Tell us what use you make of saws. Fill in the coupon NOW! E. C. Atkins & Co., Inc. Dept. P, Indianapolis, Ind. I am interested in saws for.. Address Please Mention Popular Mechanics

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It Will Pay You to Own A MONARCH JUNIOR Lathe “‘The Biggest Little Lathe Built’’ There are hundreds of things made of metal or wood, for the shop, automobile and home, that you can make witha MONARCH JUNIOR lathe. This sturdy dependable small engine lathe, guaranteed to do work with 1/1000 of an inch accuracy, was especially designed for inventors, experimenters and small shop owners who need a lathe of their own. The Greatest Achievement in Lathe Building MONARCH JUNIOR With Bench 9 in. Engine Lathe $225 Legs It is easy to learn to operate the MONARCH JUNIOR and even beginners can't jam it Itisequippedin every detail same as the bie MONARCH and is guaranteed to do all small work that any other lathe will do. You can find room for a MONARCH JUNIOR practically anywhere in asmall shop or work-room in yourhome. Write today for catalog and full information about this remarkable low priced engine lathe. THE MONARCH MACHINE TOOL CO. 400 Oak Street - - Sidney, O. 152 POPULAR MECHANICS ADVERTISING SECTION ET out and get under with your trusty Ber- nards. Trouble over quick. Grip and Cut do the trick. The only pliers that grip like a vise and cut like a cleaver. Hardware dealers. MADE IN SEVEN SIZES Send for illustrated Plier Booklet M (2) PERNARD PLIERS Wa.SCHOLLHORN CO. na JAWS NEW eS OUTSIDE CUTTER JUARANTEED CO it , — LEARN DRAWING Here is your only chance to get one of these splendid mechanical drawing outfits—at our special price. Instruments are made of gen- uine solid German Silver and fine steel, and come in a handsome velvet lined case—4 x 8 44 inches, closed. Experts consider these in- struments among the highest grade made Until further notice we will include with each set of instru- ments—A Practical Course in Mechanical Drawing. This course in mechanical drawing is most simple, thorough and suc- cessful in existence, ar ad offer rs every man, regardless of age, education or previous ex- rience, the chance to become a successful draftsman in a short time and make up to 100 per week SE ND NO MONEY Just send us your name and ad- dress and pay $6.98 on arrival of instruments one Free Course. ine struments fully guaranteed or money back, This offer is limit or particulars mailed on request. NATIONAL “INSTRUMENT co. 4704 North Hamilton Ave., Chicago, Ill. SAMSON No.1 HAND PUNCH Handles Interchangeable. Punches and Dies as Illustrated Maximum punching capacity y,” thru 20 gauge untempered metal. Willalso Per- forate Paper, Card- board, Leather, etc., upto 4” thick- ness. A Powerful Punch of general utility, made of Drop Forge Steel. Throat 136” deep. THE MACHINE APPLIANCE CORPORATION 351 Jay Street, BROOKLYN, N. Y. - or z = Oo z =) a 1 n ae = fo} » cs °o " w N ~ NEW SINGLE PHASE A.C. MOTORS 14 H.P. $47.00 % 4% H. P.—110 H.P. 58.00 volt, 60 cycle, H.P. 62.00 1725 speed, com- 4 H.P. 76.06 plete with cord, H.P. 89.00 plug and groov- H.P. 108.00 Include pulley ed pulley, $13.00 and base. ONE YEAR GUARANTEE 14 H.P. and larger, 110/220 volt Rep. Ind. Type Satisfaction gusventeed or money refunded Illustrated Catalog of Motors and Supplies FREE HYRE ELECTRIC CO., 615-H So. Dearborn St., Chicago e{670) 8) WO CIO ey-a use mtoleleymesele) pee wel e) &. The Midget “‘FIVE-IN-ONE” Slide Rule is a combination Mannheim, Log- Log, Add and Subtract, Polyphase and Binary Slide Rule. It will instantly add, subtract, multiply and divide any combina tion involving whole numbers, fractions, decimals and mixed numbers. Gives every possible root and power of every quantity. The graduations «re ; printed on metal, coated with white celluloid and are grease and waterproof. While it is the most versatile calculator ever invented, ite operation & simple and easily understood. Diameter 4 inches Price with 16-page Instruction Book, $1.50. Leas igeees ayy > ng case SOc extra. © ‘atalog free. if you are not satisfied. GILSON NSLIDE RULE CO. Niles, Mich * au ICK AND ACCURATE INSIDE MEASUREMENTS! Exact Inside Lr mye to Smallest Fraction of Inch USE IT for all measuri ‘inside or out. The on only interlocking, sliding Rule. Ideal for Carpenters, Mechanics, En, ngineere. Electricians,ete If potat dealer's. send his name and 20c per ft.for rule sent prepaid (any length, from 2 to tt. MASTER RULE MFG. CO., INC. o4,‘SSE" 555%, DAML MG. Co. Dealers and Agents: Write for Liberal Proposition

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‘tions are juloid and the most eration & 4 inches , $1.50. talog {ree ied. :s , Mich a, ane: Wy YA 44 | epWARD COLDGNITH zy DELICAvaesaNn DA ZED re * 2 [STUEPE- AGENTS AND SALESMEN $75.00 to $150.00 a week. Lowest price gold and silver sign letters for stores, offices, automobiles, ete. Large demand everywhere. Anybody can do it. Exclusive territory or travel all over while youearn. Write for free samples and catalog. ACME LETTER CO., 2806 X Congress St., as BLANK Cae PISTOL Well made and effective modelled on latest type of Revolver; appearance alone is enough to scare a_ burglar. Wt en loaded it may be as ef- etive as a real revolver with- t danger to life. Does rot shoot real bullets but takes standard .22 Cal. Blank Cartridges, obtain- able everywhere. A Great Protection Against Bur- glars, Tramps and Dogs. You can have it lying about without the danger attached to other A PRICE $1.00 Postpaid. Blank Cartridges .22 Cal., shipped express, 50c per 100. JOHNSON SMITH & CO., Dept. 840, 3224 N. Halsted St., CHICAGO a N An uncrowded occupation. Excep- tional opportunities iy live men and women. Raieod at home. wl tf You Can Tell it from a GENUINE So ner ra' ite MEXICAN DIAM ees ond bes come | rhe Oy YE jocstocted 1 cases gem MPORTING (Exclusive controllers Mexican Diamonds) POPULAR MECHANICS ADVERTISING SECTION ow TIME TO START | “‘Red Devil’ Pliers made in 100 styles—one for . Known and used the world over, Style 1024—61% inch shown here, $1.10. The Handles Give You a Firm Grip HE new style extra broad handles fit your hand like a glove. Dentyne knurling gives a firm grip. No bruised knuck- les—no pinching— no exasperation from trying to do good work with poor tools. Wed Dewil/ Slip Joint Plier Has a multitude of practical uses. Once you’ve used it, you’ll never do without it. Forged of tool steel, for strength and backbone. “Red Devil” Pliers have stood the test for over a quarter century. Used by skilled mechanics the world over. Ask the man who knows tools. “Red Devil’’ Slip Joint Plier No. 1226—7 inch, shown here, bonded for 2 years’ hard service. Price $1.20, from dealers or us. “‘Red Devil’’ Tools—American made Mechanics’ tool booklet free SMITH & HEMENWAY CO., Inc. Manufgcturers of “‘Red Devil’’ Tools 260 Broadway, New York, N. Y. “Red Devil’’ Glass Cutters—the glaziers’ stand- ard tools of the world. ‘It's all in the wheel.’ Made in 40 styles. No. 024 shown here, 20c. Please Mention Popular Mechanics

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154 POPULAR MECHANICS ADVERTISING SECTION YOU fiake “18 prorrr With Our MAKE Introductory Offer Givi These $1.25 : Senae-iatinn Shears FREE

piece Toilet Article only $1.75. TOTAL STORE VALUE $4.60 $18.00 a Day PROFIT on only TWENTY Sales

Buy eee Direct from Headquarters Save from 25° to 40% on standard makes of new and rebuilt motors. Get the proper size and type of motor to suit your | exact needs — and get it fully guaranteed by a motor merchan dising house backed with 20 years of dependable service direct | tousers. Write today for catalog No. 70. It quotes prices on motors of every size and type.

Electrical Equipment Bought, Repaired or Exchanged. THE FUERST-FRIEDMAN COMPANY “Reliability Built In.’”’ CLEVELAND OHIO Lucky 11 Toilet Set— Retail Value $3.35! MY! HOW THEY SELL! You get the attention with the free Shears. | Walter Harris sold 800 boxes in six weeks. Profit over $100 a week. You can do this too. The H D Act Now! Sell like hot cakes year round. A A M M O N baby could sell Lucky 11. Don’t wait ; a minute. Save time. Send $1.75 for complete outfit in- Folding Portable Typewriter seep = ary Forays aaa for Greve ng our ns, including 30 other packages 1 E. M. DAVIS CO., Dept. 2356, CHICAGO, ILL. rer hi PLES BAAD = q “ Brin e EF own Luminous Crueifires time by night. eaevcevercereesecarerscssas stevens: Luminous Rosaries, ete. Small sizes, SOc and $1 poetpe’ Johnson Smith &Co.,. HHT. Halsted St," “Bopt 144, Chicago

4 CASH VALUE $165. 30 DAYS TRIAL H Genuine blue-white perfect cut diamonds now sold H direct to you by DIAMOND IMPORTERS at wholesale H prices on c it at 40% discount. 18 Kt. solid, white, 3 si3) ri 7.60; 1 ca free. yagoret only $49.00; 4carat H-P $38.50 314 H-P $54.50

Sm OTTAWA Engines. : 4H-P 1 carat $195.00. If satisfied, pay s down Only sold H and balance in 10 monthly payments. We guarantee to direct from factory. $75. 95 H you or refund your money. Order direct from this 3, months’ trial. Easy 5, 7; 10 12, 16, 22 H ad. or write for 128-page bargain catalog of other jewelry Terms. Write for En- Low Prices H $1,000,000 and 43 years’ experience back our guarantees ; ine BOOK and Sale owen Loc saw

B.GUTTERSSONS 342 ‘seh het/TSRk oevamen re. co. $64.50 - ae 7 OTTAWA f

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ces on nged. NY DHIO OUR POPULAR MECHANICS ADVERTISING SECTION PATENT oe aE OFFER— Free Opinion as to Patentable Nature TRADE-MARKS Before disclosing an invention, the inventor should write for our blank form ‘‘Record of Invention.”” This should be signed and witnessed and if returned to us together with model or sketch and description of the invention, we will give our opinion as to its patentable nature. Our Three Books Mailed FREE to Inventors OUR ILLUSTRATED GUIDE BOOK HOW TO OBTAIN A PATENT Contains full instructions regarding Patents, Trade-Marks, Foreign Patents. Our Methods, Terms,and 100 Mechanical Movements illustrated and described; Articles on Patent Practice and Procedure, and Law Points for inventors. OUR TRADE MARK BOOK Shows the value and necessity of trade-mark protection and gives informa- tion regarding unfair competition. OUR FOREIGN PATENT BOOK We have direct agencies in all the principal foreign countries and secure foreign patents in the shortest possible time and at the lowest cost. Write for our illustrated Guide Book on Foreign Patents, sent free to any address. LIST OF PATENT BUYERS SENT FREE Cantaining unsolicited letters from manufacturers and others who are constantly writing us regarding the purchase or leasing of meritorious patents. We endeavor to assist our clients in the commercial development of their inventions. Specialization—Our Staff The field of invention is so vast that it is impossible for any one man to become an expert in all the different classes of invention. For this reason Victor J. Evans & Co. employ a number of patent lawyers and mechanical experts who have been selected for their special knowledge and ability in certain lines of invention. Each case is placed in charge of experts in the classes to which the invention relates. THE VALUE OF YOUR PATENT will depend much upon the skill and care with which your case is prepared and prosecuted in the United States Patent Office. That every case intrusted to us receives our best efforts, and that our work is done consistently, skillfully, and thoroughly is evidenced by the many unsolicited letters of commendation that we receive constantly from our clients. We will furnish upon request lists of clients from any State in the Union for whom we have secured patents. Our New York, Philadelphia, Pittsburgh, Chicago and San Francisco Offices Owing to the growth of our business we have established for the benefit of our clients Branch Offices in New York City, Philadelphia, Pa., Pittsburgh,Pa.,Chi- cago, Ill., and San Francisco,Cal. These branch offices being located in these large commercial cities together with our Main Office located near the U. S. Patent Office,in Washington,enables us to more promptly handle the business of our clients, particularly as the branch offices are in constant touch with the Main ce and fully equipped to handle patent business in all its branches. Highest References— Prompt Attention Reasonable Terms c——-——— — ——-FREE COUPON-— — — — — — — baat i NH \(ady Ww Liye = | ™ ahh 1 ny LGN Wil i Oi VICTOR J. EVANS & CO,,Patent Attorneys | NEW YORK OFFICES PHILADELPHIA OFFICES 1007 V/oolworth Building PITTSBURGH OFFICES 514 Empire Building MAIN OFFICES: 765 9™ STREET. N.W., WASHINGTON, D.C. Gentlemen: Please send me FREE OF CHARGE your books.as described above. Name. _ .... CHICAGO OFFICES 1114 Tacoma Building 714-715 Liberty Bldg. SAN FRANCISCO OFFICES Hobart Building Address... ..... eer nia Dos ab EES

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156 POPULAR MECHANICS ADVERTISING SECTION PATENTS F YOU HAVE AN IN- vention which you wish to patent you can write fully and freely to Munn & Co., for advice in regard to the best way of obtaining protection. Please send sketches or a model of your invention and a description of the device, explaining its opera- tion. All communications are strictly confidential. Our vast practice, extending over a period of sev- enty years, enables us in many cases to advise in regard to patentability without any ex- pense to the client. Our Hand- Book on Patents is sent free on request. This explains our methods, terms, etc., in regard to Patents, Trade Marks, Foreign Patents, etc. If you are a reader of the SCIENTIFIC AMERICAN you are probably aware of the fact that it has a special appeal to the inventor. Each issue contains a de- scription of a large number of recently patented inven- tions. Pending patent legis- lation as well as the most recent rulings of the Patent Office and the courts are considered in its columns. MUNN & CO. SOLICITORS OF PATENTS 672 Woolworth Bldg, NEW YORK Scientific American Bldg., WASHINGTON, D.C. 801 A Tower Bldg., - « CHICAGO, i... 611 Hanna Bidg., - CLEVELAND, OHIO 582 Market St. SAN FRANCISCO, CALIF. Can You think of a simple, practical idea that will fill one of the many requests we have on file for new inventions? It may mean a fortune for you. Thousands of things are needed right now. Your brains can help. Send today for our great new book— “Inventions and Trade-Marks, Their Protection and Exploitation” and learn more about making money from ideas than you ever knew before. It tells many things that are wanted, too. A postal will do— It is free We Help Our Clients without charge, to get Patents | Advertised the dollars out of their For Sale ideas—having facilities Free none others possess, in Invention and Manufactur- Advice free. Don’t ing Supplement delay—get the book at once. man with an idea. erica stries Send for freesample -~ alate ge copy. One year’s WASHINGTON, D. C. subscription, 50c. | PATENTS Published for the /GENDFOR SO THIS FORM DON’T LOSE YOUR RIGHTS TO PATENT PROTECTION Before disclosing your invention to anyone send for blank form “EVIDENCE OF CON- CEPTION” to be signed and witnessed. A sample form together with printed instructions will show you just how to work up your evi- dence and establish the same before filing ap- Plication for patent. As registered patent at- torneys we represent hundreds of invertors all over the United States and Canada in the ad- vancement of inventions. Our schedule of fees will be found reasonable, The form “Evidence of Conception,” sample, instructions relating to obtaining of patents and schedule of fees sent upon request. Ask for them—a post card will do. PATENTS AND J —ATRADE MARKS IIANCASTER €&de*8. ALLWINE ‘ 204 Ouray Bldg. “25 Washington, D. C. Originators of forms “Evidence of Conception.”

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its ed POPULAR MECHANICS ADVERTISING SECTION 157 PATENTS Booklet Free Highest References Promptness Assured Best Results Send drawing or model for preliminary examination ALL BUSINESS GIVEN PROMPT AND PROPER ATTENTION WATSON E. COLEMAN, Patent an sane 624 F oF Sian Weatingion, D.C. PROTECT YOUR RIGHTS WRITE TODAY FOR FREE BOOK ABOUT PATENTS and “RECORD OF INVEN- TION” for establishing evidence of conception. The book tells how to proceed, the usual cost of obtaining a patent, and contains good sound pri actical advice every inventor should know. RECORD OF INVENTION’ ‘should be filled out, signed and witnessed before you disclose invention to anyone. Send rough sketch or model and description for free re- port upon patentable nature and cost to Patent, etc. Prompt, personal service. Reasonable fees. Partial payment plan. Preliminary advice without charge. J.REANEY KELLY PATENT LAWYER 612-COLUMBIAN BLDG. WASHINGTON, D.C. PATENT TE MES To the Man with an Idea I offer a comprehensive, experienced, efficient service for his prompt, legal protection and the development of his proposition. Send sketch, or model and descrip- tion, for advice as to cost, search through prior United States patents, etc. Preliminary advice gladly fur- nished without charge. My experience and familiarity with various arts frequently enable me to accurately advise clients as to probable patentability before they go to any expense. Booklet of valuable information and form for properly disclosing your idea free on request. Write today. Richard B. Owen, Patent Lawyer 9-303 Owen eee Washington, D.C. 2276-E Woolworth B » New York City If You Have an Invention and Desire to Learn How to Secure a Patent Send for our Guide Book, HOW TO GET A PATENT, sent Free on request. description of your invention and ; we will give our opinion as to its patentable nature. RANDOLPH & CO. 600 F St., N.W., Washington, D.C. Tells our terms, methods, etc. Send model or sketch and

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158 POPULAR MECHANICS ADVERTISING SECTION ST OTD ZZ Diiciain PROCURED | TRADEMARKS REGISTERED Send disclosure of invention, design, or trademark for actual search ot U. S. Patents and novelty report. Validity and infringement investigations. Patent and trademark suits prosecuted and defended anywhere in the United States. Discriminating clients appreciate my efficient service. No literature will be sent you as this is a professional service, individual and Personal. Specific information and advice given regarding each individual case. Specialize in prosecution of pending cases that have been previously rejected by the Patent Office. Specialize also in unfair competition litiga- tion before the Federal Trade Commission. George P Kimmel, Master of Patent Law 53-I Loan & Trust Bldg., Washington, D. C. ee i§ PATENTS ENTS and TRADE-MARKS r one of the oldest patent firms in America, and “te cut a clientage extending to all parts of lowest cnt we afford Inventors and Manufacturers, meen Be ow ae, a service noted evidenced by many well — — — — — — — — —_ — = — — — — — — — — — — — — for Patents, Trade Marks, Foreign Patents, Copy- rights, etc.; gives information on Patent Procedure; tells what every inventor should know. ‘Thousands of Inventors, who are our clients, are our references. Chandlee & Chandlee, 25 Years Experience. 422 jth St. Washington, D. C, Send us sketch or model for patentability opinion and exact cost of patent. Our book “‘How to Obtain a rn nt a 646 F St. Washington DC. Patent,’’ Sent Free on request. It tells how to apply ESTAS LISHED 1869 PATENTS GEARS smait as §8=€6—corPee Taacmstte. Weeairy s commplots lise of gears in stock for immediate shir ment, Can also quote on special gears of all kinds, Send us your inquiries WRITE FOR CATALOGUE. CHICAGO STOCK GEAR WORKS 105-109 S. Jefferson St., CHICAGO Send for our free book of patent information. k 802 F St., Washington, D. C. DEANE Ca Tart 16 S. Broad St., Philadelphia, Pa. Inventors should write for our “Evidence of Disclosure”’ fort It’s Free. Avoid Dangerow C. L. PARKER PGorpe, U.S. Patent Otices PATENT LAWYER Delays. Send sketch or mod MCGILL BLDG. ; of your invention for exam WASHINGTON, D. Cc. nation and advice. Ask for Free Book “How to Obtain a e ae Patent.”” Highest references. Write to-day. Patents, Trade Marks, Copyrights, Patent Litigation Merton-Roberts& Co.,184 Mather Bidg., Washington,D.C. Handbook for Inventors, * * Protecting, Exploiting and Selling Inventions,”’ sent free upon ——_ AIDED. Ideas de yweloped. Experimental = - INVENTORS Machinery Built. Individual Servic: RICHARDSON & ROGERS, 7 ALBEE, WASHINGTON Practice in all Courts. | TRADE-MARKS. We seel the valid PATENTS SEND FOR CATALOGUES Gear and Exrpertmental Parts Materials of all Kinds ..... Model Engine Circulars... ne RN COLBURN GEAR & MFG. CO. Saccess 5 Woodworth St., Boston 22, Mass if you “have an tdea to patent write _ The - WONDERFUL PATENT ADVICE” and for eis er RECORD which ERICKSON ee ae contains full instructions for proceeding | | Willnot - Personal Service - oon. WH. MULLIGAN. PATENT LAWYER. nor draw 02 Woodward Bldg. Washington : stump. ERICKSON ARTIFICIAL LIMB CO., 38 Wash. Av. N., Minneapolis. Minn at

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ee ne essors ass Minn sins POPULAR MECHANICS ADVERTISING SECTION MONEY MAKERS for AGENTS SHOCK-PROOF LAMP, the new unbreakable mill type lamp, is fast replacing the old style. Stronger and gives many times the downward light. As its name im- plies, it is 5 es y POOF; stands jars and sudden knoc 80 prevalent in GAR- AGES, FAC TORTES, MILLS, SHIP- YARDS, STEAMSHIPS, MINES—yes eveninthe HOMES. Lasts longer and is sold for less money . Big money-saver. FREE tnd. fer om our tay S PLAN explains how easy OOF . ry GARAGE, FAC TORY. MILL, RAILROAD YARD, STORE i MTOME is looking for just this chance to get a better lamp for less mone y jitisa BIG MONEY MAKER, AGENTS everywhere are “cashing-in.’ Thisis YOUR ‘opportunity « Don't letit get by. Grabit. FOR OUR AGENTS PLAN TODAY SIVE TERRITOR Given to agents who qualify. Now is the time EXCLU to get your share of BIG } {ONEY and EX- CLUSIVE TERRITORY. GET THE AGENTS PLAN TODAY. IT CO8TS YOU NOTHING. MIDWEST LAMP CO., 143 W. Austin Ave., CHICAGO MAKE $600 to $5000 A YEAR Any place, wherever people pass, you can start your own business. Make $600 to $5000 a year selling fragrant delicious Butter-Kist Popcorn and Toasted Peanuts; also cones, soft drinks, sandwiches, coffee, gum, etc. The Butter-Kist way makes it easy. BUTTER-KIST MACHINE and HOUSE The famous Butter-Kist Popcorn Machine and Peanut Toaster is now sold with this specially designed ready-to-set-up, low-cost house. Handsome, « venient, storm proof, takes little space, attracts busine Butter-Kist good- les are proved moncy makers We help you start. Write for new reduced prices, easy terms, today HOLCOMB & HOKE MFG. CO. 2026 Van Buren St., indianapolis, indiana W orid’s laryest manufa rs of pop corn machines and pean at “tonstere PATENTS Secured Prompt service. Av oid dangerous delays. Send for our Record of Invention” form and Free Book telling How to btain a Patent. Send sketch or model for examination. Pre- ninar ¥ anes e without che urge, Highest references. Write TO- DAY. J Jackson & Co. 327 Ouray ; Bidg.. Ww ‘ashington, D C What a Man Should Know Rejuvenation without “freak” surgery. Have richer blood, lower pressure, boundless energy, perfect gestion — youthfulness Banish constipation. _ Lengthen ir life—be genuinely happy. Testimonials without num- r; write for convincing proof. BYRON TYLER, Food Specialist 308 Gibraltar Bldg. Kansas City, Missouri Blank Cartridge Pistol FREE REVOLVER STYLE Well made and effect- Sal prove just as effective » Feal revolver without danger to Does n shoot real bullets, but s the standard .22 Calibre Blank — lees obtainable everywhere Great Protection ) Raginns Surgiars, ramps and ou can have bout witho ~y the danger atta hed to other revolvers. stensively by leading firms for a dollar. For a limited time only we are gi ¥ subscribers to the RACINE BI trated magazine ay Ad- ' 1 these Pistols to secure LETIN, a large monthly evar Lanne ccacbeutall of coda ea n resting items all over the world, articles on p »pulur science, myste ry gic and mirth, money- king wrinkles relating to every trade and mant utnc tu ealth hints, tried and ed recipes, gossip about well known persons. Thousan yp f dollars given away in a u, met : me ntion a free $1,000 Ener irance Policy in every issue to each subscriber tletea’s ote more combine to m ne of the most interesting magazines pub- Gulla: m America. Send ONLY $1 00 for a three years’ st sheoription to the Racine ulletin one we will send you the Pistol free, und the magazine for three years. dept. 839 THE RACINE BULLETIN racine, wis. 159 Radio Inventions Needed! ERE is a new Industry in which millions of dollars have already been invested. Yet it is only in its infancy. There is room for thousands of new inventions. Who will make them? Will you? If you invent a Radio improvement, will you know exactly how to perfect it, patent it, market it? Do you know the habits of thought and the methods of work that produce new ideas? Let Great Inventors Show You How to Invent Every man, woman and child is born with inventive faculties. Some develop them to a greater degree than others, and are successful in- ventors Invention is an orderly process of the mind, whic h combines two or more known facts to produce a new fact Anyone who develops the right mental process can become an inventor Every successful in- inventor has this type of mind, developed by constant experience over a period of perhaps many years Heretofore those who succeeded in the field of invention had to discover all the principles themselves But, now, just as any stude nt of medicine, law, or engineering can take full advantage of all the recorded experience in these fields of study, so can YO! take the same kind of short cut to the habits of thought, and the methods of work required of successful inventors. A new Course for home study, prepared by R. F. Yates and other inventors, gives you exactly what you need Little Inventions Win Fortunes The men who invented the bottle top, the crimped hairpin, the vacuum tube for radio, the thin lead automatic pencil, the snap fastener—all these men, perhaps, got their ideas in a flash, and founded their fortunes as a result of a single idea But in every ease their minds operated in accordance with the scientific laws of successful invention. Edison says Invention should be taught as a profession."”” Every inventor realizes the hopelessness of groping in the dark for the habits of thought and methods of work required for successful invention. Trying to invent without know- ing the fundamental requirements of invention is like trying to build a bridge without knowing engineering ‘ Id Every man at some time or other has an Don t Waste eas! idea for something he would like to invent, but his mind doesn't know how to work. He doesn't know what to do about it—doesn't know how to think along inventive lines—and soon someone whose mind is trained along inventive lines invents just the thing you may have thought of Write FREE BOOK A wonderful book explaining this wonder- for ful new course in detail has been written and will be sent free to those genuinely interested This book ex- plains the course in detail, and proves that anyone can become an inventor who trains his mind—it may be the beginning of a fortune for you. If you have ever had an idea for an invention, or if you would like to become a spare-time or professional inventor, and if you would like to know what to invent, send in your name at once on the coupon NOW! Only a limited number of these books are available for free distribution Bureau of Inventive Science 46 WISNER BUILDING ROCHESTER, N. Y. = ee ee ee ee COUPON — Se BUREAU OF INVENTIVE SCIENCE Dept. 46, Wisner Building Rochester, N. Y. Please send me your free book rhe Science of Invention Name Address City.. swe iveseds ae State

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160 POPULAR MECHANICS ADVERTISING SECTION BIG MONEY FOR YOU! THE BUSINESS FOR YOU! 5 9 : . | Make and sell Crispettes, delicious confectio: 0 A Week Easily Possib e Everybody loves them. Can't get enough. Come again . ~. . : again for more. Easy to make For the first time, Mr. Average Man, you are given furnish everything. Raw materials the opportunity to get into this immensely profit- plentiful and cheap. Profits enor- mous. able business that has made thousands of operators rich. Let us show you how to be a scale operator! Buy machines from us at wholesale—only a small investment needed. Your money quickly doubles itself. No merchandise for you to handle—no time wasted—-one hour a month enough at start. Just put scale on location—it does rest. Scales Are Piling Up Fortunes Start making yours today. Some scales have earned over $80a month. Own only a few and be independent. We make 90% of all coin machines—and we know what scales will do. Our scales are all newest type of construction—best payers. No safer, more profitable investme nt for you FREE! Write for Free Books “Making Your * Fortune With Pennies,” ‘‘How to Own Your Own Scale Business,” ‘What Harry Williams Did with Five Scale 3,” General Cata- Quick success possible anywhere—cities, small towns, vil! log, and Inside Money-Making Secrets Amazing market—crowded streets; surging throngs at f; known only to operators. carnivals, parks, etc.; wholesale to grocers, bakeries, druggists soon. Possipilities unlimited! Need no experience. Little ca starts you on road to phenomenal earnings. WRITE—GET MY HELP — BEGIN NOW ! AGENTS or Anyone Who Wants to Make Money! If interested in hooking up with the World's Largest Manufacturers of Coin Opera- | Othere are making money—lote of it Letters just received during thie ye t ted Machines, with no investment on your part | wonderful successes. You can succeed, too. Start is all you need. I'll tind rite tod Sell achine fabulous e: : | you. Furnish everything—complete outfit, materiale, secret formula, fui! write today. Sell coin machines abulous earn- | tions, wrappers, ete. Send post card for illustrated book of facts. Tella how ¢ ings possible Single machines have earned Explains most successful methods. Gives all information needed. It's free. over $200 a week. Address Dept. 5B. } now! LONG EAKINS COMPANY Address All Inquiries on Seale | 628 High Street Springfield, Ohio Operating to as = — MILLS NOVELTY COMPANY [BUILD YOUR OWN | — JACKSON GLve. AND om GREEN STREET Dept. 24 | : : | IRELESS TELEPHON . ; ; ' This wonderful invention now within the reach of all. | We Want Agents |. bulb and 2 amplifiers. Best regenerative hook-up. Receive | Hear free music, latest news,market reports by radio = - = s ty . nals allover U.S. Equals $150sets. Blue prints, instruct list of parts complete to build and o were ate the famous “Universal Radix 50 : ( Re al pleasure and education for the whole family. Mak« “Universal Radiopbone”’ and save $50. Simple as A-B-C. | | . 3 | phone. Order “se today . Com o = y; no stamps accep Per set, prepaid for 77 > > You can’t afford to mise thie ‘The ar to sell the Ne Ww Improved AMERICAN RADIO CO., 27 Warren St., New York, N. Y. Arrow Razor Sharpeners. No. 1 Arrow sharpens any kind of Safety tazor Blades. No. 2 Arrow sharpens FOR ALL PURPOSES iId-style Open Razors. Each Arrow ANDARD MANUFACTURERS has two genuine Norton Hones OMPT DELIVERY Easy to operate. Evenly hones both sides of blades Pocket size, nic kel- ALL SIZES UP TO 5 H.P. plated and fully guaranteed. Ever * 4° man wants an : ’ We Specialize In Small Motors & Generators man wants an Arrow. Great seller. A live proposition for every Agent. ALL PHASES AND FREQUENCIES IN STOCK AT ALL TIMES Special to Our Agents Largest exclusive Mail Order Small Motordealers in the world. $3.50 Puts You in Business CHAS. H. JOHNSTON, Box QTR. West End, Pittsburgh,Pa. One No.1 and one No. 2 Arrow sent to you for $3.50, WIRELESS, TELEPHONE GENERATORS postage paid, on receipt of Money Order. Very attrac- 500 VOLT- 100 WATT - 3400 R.P.™. tive prices in larger quantities. Arrow Razor Sharp- FOR VOS rf GENERATOR SETS eners sell to consumer at $2.50 cach Ask for territory. Mail your order today! Money order, draft, or C.O.D. WESTERN APPLIANCE CORPORATION | | 642 Beaubien Street Detroit, Michigan CATA Los cz="ADD TO YOUR INCOME $21, si0;28) sss “AMERICAN’ Key Cutter EASY WITH New Improved Green Automatic Machine Sharpens, Hones and Strops all kinds of safety razor blades, im one operation, from four to six blades per minute. For both Quality and Quantity, this machine ig in a class by itself. There is nothing like it on the market. Let us send you our descriptive literature explaining everything, including the “AMERICAN” Key Curter—cuts square, angular or round slow. AMERICAN SHARPENING MACHINE CO. (Inc.), Dept.6, 184W. Was ington $t., CHICAGO

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~~ v! 110 a

POPULAR MECHANICS ADVERTISING SECTION 161 $2,500 Monthly for Miller with WILLEY UNIVERSAL VULCANIZER Walter J. Miller invested 3175 in 1919, came to our plant for instructions for three weeks Since that time he has bought his own home. Heis now doing $2,500 worth of business per month, employing 2 men and making big money. Sold on Installments Tire repair business is all cash Only small investment necessary. There never has been such an opportunity to enter this big money field. ““" Thousands and thousands of used cars are be- ing bought ont used. Most of them have worn tire equip nt They must go to the vulcanizing shop for repairs GE ae you practic cal training in our plant and shop or by mail FREE. rhe machine ve self contained, burns coal, wood, kerosene or gas. Economical to operate. Set upin afew minutes. FULLY guaranteed. WILLEY UNIVERSAL VULCANIZER CO. 26 Willey Building Battle Creek, Mich. AUTO OWNERS WANTED To introduce the best automobile tires in the world. Made under \ our new and exclusive Internal Hydraulic Expansion Process that eliminates Blow-out— Stone- Bruise—Rim-Cut and enables us to sell our tires under a 10,000 Mile Guarantee We want an agent in every com- munity to use and introduce these wonderful tires at our astonishingly low prices to all motor car owners. Write for booklet describing this new process and explaining our amazing introductory offer to owner agents. Hydro-United Tire Co.

Gept.(00—Chicago SanFrancisce Pottstown, Pa

: ——— vy > ; Over a Hundred Styles and Sizes Send for new illustrated e: ms slog showing latest reduced prices. It’s Free. 10 days’ trial given SENECA CAMERA MFG. COMPANY 300 Central Avenue Rochester, N. Y. Goods are sold......... In In U:! 8. $4.00 in Canada

If your dealer cannot supply you, write us direct, en- closing $3.50 together with dealer's name, and the Campfire Grub Stake will be sent anywhere in U. &., parcel post paid. Order at once. CAMPFIRE MFG. CO.

Lea Boatman’s Bank Bidg. St. Louis, Mo. RC rare +

Which Way? ON’T take chances —you can snow your direction every time if you carry one of the

Nime Styles. Ask your dealer for prices. Inher /nstrument Companies Rochester, N. ¥. There's a Bees or Toker The:mometer for Every Purpose,

ERE is the ideal all-purpose craft —The Moto-Row — combination power and row boat at a price made possible only by quantity production Designed with ample sheer and ful! flare forward, it is extremely dry in a smashing sea. Constructed of selected airplane spruce, copper riveted, mounting a depend- able 2-hp. motor beneath rear deck, protecting it from exposure and theft, The Moto-Row represents a sturdy, convenient boat—without rival for fishing, sporting and vacation purposes. Built by Sidney McLoud, Marine City, Mich Moto-Row's reinforced ske pre peoote the propeller in shallow water and a er boat to be beac hed ut injury Sis- pagsouper capacity, 7 MS . Balt water equipme atte oxtre. Illustrated Catalog on Request,

BELLE ISLE BOAT & ENGINE CO., Dept. I, Detroit, Mich.

TE

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162 POPULAR MECHANICS ADVERTISING SECTION Get This Wonderful Ring. If You Can Tell r ] it From a Genuine Diamond Send It Back] These amazing, beautiful CORODITE diamonds posi- tivel match genuine diamonds in every way—same | zling pier ot of living palubow fire. They, alone. payee — ‘all their experience to see any difference Prove ma expat phate Corodite Diamond 10 DAYS FREE i nw woke thie San te ——— nee return the Co de to keep the eset the price prt Corodites have uine stones. MK Go ao fee Belcher Wai Gold. Ron Ring ©“ % ve ‘e Pomecn Finished _ 4 latin im Finish ' lar artleather velvet lined case free with each } SEND NO MONEY *: Keep your pL monee ot right at home. Just send your | and number o bg as shown by strip of paper My iy end t to end around finge= joint. Your ri ( will come by return ma a, ng enrivee devote, amount shown wi \ postman. e © keep r send f ond your money will be immediately Teterned. ~. Ay ates E. RICHWINE Co. 333 South Dearborn Street, Dept, 38, Chicago, Ils We are sole importers of Corodite Gems for the United States Change it to Comfort the Renulife Way For the dull, annoying pain of a chronic head- ache, the sharp recurrent stab of neuralgia or the headache that throbs and or uns constantly, Renu- ife Violet Ray offers quick relief. It gives immediate relief, reaches the source of the trouble and remedies the cause By saturating every ce oll, nerve and fibre of the body with highly remedial electricity, waste tissues are eliminated and nature is allowed to build up new strength and vigor wherever disease has been - if Violet Ray treatments are pleasant and give no sensation of shock or pain. The youngest child or most feeble invalid can take and enjoy Renulife Violet Ray. This scientifically approved treatment can be used in your own home when- ever needed. It covers a great range of ailments and does its work thor- oughly and well. Send coupon today. Renulife Electric Company 1106 Newberry Bidg., Detroit, Mich. Send me without obliga- tion full information on Renulife Violet Ray and your free book “*Health.”” BBGIONB 6.04 ccs s 0s 0d2cves Easy to Play Easy to Pay True-Tone SAXOPHONE Easiest of all wind instr ments to play and one « the most beautiful. You can learn the scale in a: hour’s practice and play popular music in a fey weeks. You can take your plac: : in a band within 90 a if you so desire. Unrivalled for home en- tertainment, church, lodge or schoo! In big demand for orchestra dan music. The portrait above is of Donal: Clark, Soloist with the famous Paul Whiteman’s omy Fr T H I You may order any Buescher Instrumer ree ria without paying one cent in advance and try it six days in your own home, without obligation. | perfectly satisfied, pay for it on easy payments to suit y« convenience. Mention the instrument interested in and complete catalog will be mailed free. Saxophone Book Free Tells when to use Saxophone singly, in sextettes or in regular band; how to play from cello parte in orchestra and many other things you would like to know. Buescher Band Instrument Co. Makers of Everything in Band and Orchestra Instruments 2534 Buescher Block, Elkhart, Indiana SQUAB BOOK FREE at once for free book, prices, etc. Squabs are selling at the highest prices ever pur, known. Breed them and make money. Writ Plymouth Rock Squab Co.. 634 Howard St., Melruse Highlands, Mass ; Realelolhs Book FREE ‘mustrated. Facts about the easy, —— home industry — — grow- ng domestic hares for meat, “ur, fancy. Little space—cheap equip- ment. Big demand. We buy all ou raise at $7 to $18 per pair. | hy your spare time into cash. Book free —- write now. ‘THE AJAX EYELET FASTENER BINDS AND INSERTS AJAX EYELETS !° PAPER, CARDBOARD, LEATHER OR CLOT! It Saves Time by Punching the Hole, Feeding the Eye- let and Clinching It in One Operation. PRIC! Drop the eyelets WIT! into the maga- 1500 AJAX ei : EYELETS zine and go right ahead. Order from $10.00 your stationer or DELIVERED direct. IN U.S.A Write for our catalogue of office tools MACHINE APPLIANCE CORPORATION 351-353 Jay St. Spec. Dept. Brooklyn, N. Y-

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POPULAR MECHANICS ADVERTISING SECTION 163 Make *200.to 1000. Profit Monthly,

With Balba Perfume Sales Machines > People love perfume. Men, women and children will buy Balba. Its fragrance is soft and lasting and !t is easily accessible. Just think. Grown-ups and boys and girls spent $250,000,000.00 in one year in the United States for perfume, alone, at toilet counters. Consider how much more will be spent when a dime placed in a Balba Sales Machine will bring forth a conveniently sized bottle of rare Balba Bouquet Perfume. Balba Sales Machines, the serve-self idea applied to perfume sales, are popular. One machine holds 144 bottles, and between 3 and 4 people use it daily, with a profit to the owner of $4.00 per machine per month 100 machines bring E in $400.00 profit per month and can be easily hand!ed in spare time. BALBA

Ou a : = Bouquet Perfume Perfume Lee [poses ol - Of rare and lasting quaiity. Balba Bouquet radiates a ; fragrance of elegance and refinement about the wearer. Hun- n- dreds of regular customers buy from Balba Sales Machines, 0] 5 to 12 bottles of the soft, rich Balba perfume at one time, - because they can carry them easily in hand-bag, or pocket. 1c ald —S-, B : : tl ~ peut 25c to 50c Value for 10c a Bottle ~~ Lae Because all middlemen’s profits are cut out by the serve-self sales plan er of Balba Sales Machines. we can manufacture this high quality ice = in large quantities and give 25¢ to 50c¢ value for 10c a bottle. lf la O. ' . nes ~ Sold Only E Through Balba “a Sales Machines

ass To give highest quality, and largest quantity at lowest cost in an inexpensive bottle, Balba Bouquet Perfume is old only through Balba Sales Machines, on the serve-self plan, cutting out all overhead expense. Note the attractively ‘el-plated, practically thief-proof, easy to fill, simple to operate, Balba Sales Machines Weather-proof, used inside or out in small mace on wall or counter. . . We Want Balba Sales Machines in Every City, Town and Recreation Resort We have thoroughly proved that Balba Bouquet Perfume is a good er, it repeats, it makes new users Balba Sales Machines in good - a- WHERE BALBA MACHINES CAN BE show un increasing business, proving that the serve-self plan applied PLACED perfume is a safe, sane, logical selling method. We are offering a tested, Theaters Bath Honses Shoe Shine Parlore ven, big profit, permanent business to a live person (man or woman) in Pool Halls Factories Lunch Counters h territory. Instead of territory rights. we sell an allotment of Balba Denote Rest Roome Skating Rinks hines in proportion to population. We give the purchaser exclusive Retaeeete ‘eles feome thts to sell Balba perfume in that territory No perfume but Balba Cafeterias Candy Shops old like this. Balbais being advertised Nationally. Drug Stores Be to > ene ar Stores oving Picture Houses Over 500 Cities Already Taken oh yb Over 500 towns and cities are now under contract. Every mai! brings Eiceatess W contracts— Machines are now being shipped in large quantities and being Traine t up daily and National Advertising ts being placed—the contracts are Parka, ® R ing to men of action and vision— thousands of good cities and counties are : | open but it will take quick action \ New York, Chicago, Detroit, Cincinnati, Pittsburgh, Buffalo, Des Moines, : Los Angeles and Springfield, Mass.. are some of ae towns taken ° ; READ WHAT BALBA SALES MA- FREE Newspaper Advertising in Your Territory CHINE OWNERS SAY When you have bought and placed a full allotment of Balba Sales Ma- a ey a , chines, we will run advertising in your local newspaper, giving locations Of gyora wt ARO ~ ite 7 ye ret 100 ' | your Balba Sales Machines. This starts people buying Balba from your «tar nan, Michigan, say Balba Sales Machines ref advertising was tu achines put up, aver-

t

chines, and the high quality of Balba keeps them buying We tell you aged 3 plays daily ‘This ie at the rate of $168.40 clear profit monthly n ~ ~ place ae and handle them We are ranidly getting general *" t advertising cistribution, and are placing advertising in the National Weeklies and Women’s H RICE inagazines to make perfume users throughout the U. 8S. want to buy Balba. Send 10c Coin or Stamps VITH 07, H —with name and address for full size bottle of Balba Bouquet Per- a Guaranteed 1007, Earnings or Money Refunded = 5,3!" iret to < ‘ooo Ur proposition as well as our perfume is guaranteed. We guarantee é - ETS 00% earnings on the original machine investment the first year, provided Be the fret in pow tersitery to, mae s Fortune in Dimes. Get 00 machines are all placed in use and kept filled, or we will refund the original ee eter een ier ntary until yon eet our proposition . Read . price of the machines and perfume then on hand and take them back. what Balba Bouqueteria Owners say and send for your allotment Now RED “an THE BALBA CORPORATION of AMERICA Suite 46, Balba Bidg., Toledo, Ohio, U.S.A. T= BALBA,£. oF, cANADA

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164 POPULAR MECHANICS ADVERTISING SECTION NEW INVENTION $195 (ore Ends Tire Troubles weiie ooh aaa A remarkably simple and inexpensive in- priced complete motorcycle vention which makes blowouts impossible, “Beats eliminates 95% of all punctures and prac- all” tically does away with all disagreeable tire Low fuel cost changing, has been patented by Walter G. Critchlow, Suite 164, No. 716 Madison Electric lights | Dependable front and rear Speedy Street, Chicago. In addition to freedom from the annoyance of punctures and blow- outs, users report that they get from 5,000 to 9,000 extra miles wear from their tires. Mr. Critchlow is so proud of his in- vention that he is making a special 30 day aie trial offer to every car owner, and also vans offers $10.00 reward for any blowout that tally ge Bes occurs where his invention is used. He —_ 7 a opadetion Geis Ie ae wants one representative in each locality request — ee ae, as cee to take care of the tremendous demand that ogee goat costlier machines—requires no is sure to be created wherever his inven- territory not con- cany to bandlo—operates swiftly tion is shown. If you drive a car or want a to learn how you can make from $150.00 to $350.00 per month send Mr. Critchlow your name and address at once for full particu- lars, and a good size sample which he will send free of charge. ~ FORD CAR GIVEN _ Solve This Puzzie. Win Fine Prize is 812511521 The figures rep- 15) 8 (25/15/21) resent corres. onding letters 14:18'2 fn the "alphabet. r qn wurelisA, a e three words. What are the wor det To Men, Women, Boys and Girls or All can share in these EASY-TO-WIN prizes. Send the three Manufactured by CYCLEMOTOR CORPORATION Box 1031 = Rochester, N. Y. Nire User Car owner agent wanted in yd eommunity et A g e n t vce and t orders rine on are or full time for Harrison pars Wanted lade Tires at our low prices, fully GUARAN TEED 10,000 MILES (Not seconds) Finest materials used. Shipped on approval prepaid 15 B and so on, Capital or ex en: a . Semple words on a slip of paper with vour name and address. Resides the HEAVY sections een ~~ iF lee camee aller ayto! am going to aive eway Fhonerraphe. Bicyles, Gold Wetches HAND and get ourl ow factory prices to user agents ilverware, etc. and cash rewards. Send your answer. Act qiue HARRISON TIRE & RUBBER CO. Duane W. Sovterd, 537 S. Dearborn St., Dept. 98, _Chicago MADE 230 Indiana St., Hammond, Ind. srar w A. C. single ( > Paint your car, too. You can do it in a jiffy. Instruct ies lige Th \% th Po sis.o0 sd yy Yr. ‘ $32 oe RF — make it easy and help you save mechanic's bills new 3-ph., 60 cy., 220 V., 1800 RP ta codeagn Soonpiote, 5 H.P Complete ey top, back curtain, large can of enamel, 75.00: 3H. P.. $60.00: > H. P.. $50.00: 1 H.P $45.00. New Ford cars, $9.95. Same outfit for all other cars, $15.75. A. C. oscillating fans, 110 V.,60cy., complete, 12-inch, $20.00; Write for samples and Catalogue No. 3 16-inch, $23.00. Order your motors and fans while we have | | Special Offer for Dealers them in stock at these low prices. Our first policy, satisfaction or money back. CASH MUST ABSOLUTELY ACCOMPANY YOUR ORDER. A. E. Schneider Mfg. Co. General Motor & Machinery Co., 601 W. Adams St., Chicago, Ill 4265 Hudson Blvd. West Hoboken, N. J In price alone, you cannot find in the open market a welding outfit that resembles a \ equal to this ““Weldit’”? under $140 to $165. In design, proven efficiency and ev’ detail of actual quality it is not surpassed—we might say not even gyal at any price. Preferred by such representative users as Dodge Bros., Ford Motor Co., Owens B tt Mch. Co., Studebaker Corp., Timken-Detroit, American Shipbuilding Co., Tho St: arrett, General Motors Corp., it has stood the severest test of years and is acknow! ae j be the highest development S~ acetylene pow equipment. All of our appara’ is inspected and approved by the National Board of Underwriters The price of only $75 is direct to you from our factory, backed by our reputation a! absolute guarantee. No salesmen, commissions or dealers’ profits, we prefer to do bus direct with our customers at our own factory prices. Once you see this equipment you ® instantly recognize the great saving and superiority of service this offer represents. it isa value you cannot afford to pass, if you need or use acetylene welding. We suggest that you write today for complete information. Address: WELDIT ACETYLENE CO., 146 West Larned St., Detroit, Mich. Factory Prices on Everything for the Welder e

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| at w is a POPULAR MECHANICS ADVERTISING SECTION 165 Ideal for home-made phonographs, ex- perimental purposes and combination phonograph-radio sects. We have 357 small motors which are greatly under-priced for quick clearanee. You will never again equal this low price, when this lot is sold. They are universal motors, 110 volts, 60 cycle single phase, complete with turntable, cord and socket for immediate use. 1400 R. P. M. Motor has 1” — with flange for 4” flat belt. Housed in highly polished, nickel- plated shell. Don’t lose out on this remarkable offer. Order your motor today. Tomorrow may be too late. DO IT NOW! Price $10.00 f. o. b. Steger, Illinois. industrial Division Steger & Sons Piano Manufacturing Company Dept. 90, Steger Building Chicago, Ulinois WANTED 52822285. M ike big money from very start—$75.00 to $100.00 weekly I re st made-to-measure talloring house, furnishing an equip- dred woulens, wante y to take orders Satisfaction gus t merehants in many towns have aqertes with our line it ve want surself permanently in busine se and big money wales i or fu s, giving your experienc sales m on on Callen” soeales agent P. M. HORN, Sales Manager, Lock Box 483, Chicage Ties WONDERFUL INVENTION converts any ordinary cook stove into a gas stove OXO-GAS is made from kerosene and air Cheaper, cleaner and more effi- cient than coal. Responsible dis- tributors wanted. GLORIA LIGHT COMPANY 114 N. May St. Chicago, Ill. =~ DIAMONDS , Anniversaries, etc. Pa Here at 60% .- whee of Market Price) aa “This absolutely flawless diamond gem if 1/2 — 1/16 ct. at ome among bargains || fin recent list. Many other big values im our | lists. Buy HERE! Prices base based on loan values not market yy This 75 year old diamond \\ inking firm has thousands of unpaid loans \\ and other bargains. Must sell NOW. hy Pay Full Prices Any diamond sent Ry A — ay free quan nation at our risk. Send for Latest “List Describes Diamond Bargains in detail sae \b lou Can EAS/LY aE a”. | ity MO: PROFIT We 535720 per Year “For Yourself! / Millions have been made ~ on the 5c and 10c store idea 24 in: high. because these coins are freely Toasts spent Now comes the biggest penny Nuts at once. Set ay sales idea ever hit upon and electricity > has made it possible. A le vending fe” machine with new process buttered I’-Nuts on any count- er; uses ordi- nary electric 5) current. Less than in plain view. It keeps them toasted; an 2eper da serves them HOT. Moreover, it flashes an ele: epuates tric sign all day long saying “Eat "Em Hot--ic. * . . Stands Out Like a Light House! ‘ This sensational new type Sparta peanut vending machine absolutely compels attention. It gets the pennies by thousands, and serves fresh toasted Buttered P-Nuts so tempting that each cus tomer repeats again and again We have dozens of letters and affidavits stating that $30.00 a month i easily made by ONE well | apne machine and that $5720.00 a year is easily geetined. What you make —~ vends entirely on how n iy machines you have i where they are lo« ited, and remem ber, a tte + sum of money puts you es right WE SHOW You HOw! We give you 50 pounds of our own Butters P-Nuts FREI O! CHARGI with each and ever machine This means you cperate without pear cost for the first 44 cays. Your profits in 44 days will practically pay for each Ss your ma- chines. We tell you how to pk cht ichine to best advantage in theatres, clu ty de t barbe shops and many other crackerjack locations We send you free, by return mail, full and ‘complet information on this great Business Offer The Good Territory But Remember is Going Fast! We give every operator A-1 excl ve ter preOry ( seg tae ntly this aplendic offer necessaril ~ pon ‘bel top rr \ and get “tall details without. ony “obligation to y | sot , Pear me. OFFER ‘FREED COUPON «to you > a MFG. CO Ww 4 1-3 tonia Ave., ” De t. 2216 NOWg Grand Rapids, Mich. uf Gentlemen:—Send without any obligation, fu a nd complete details of your Great Offer on Sparta “Hot Flash” Peanut Vending Machines SPARTA MANUFACTURING COMPANY 1-3 tonia Ave., Dept, 2216 Grand Rapids, Michigan AIL TODAY SPECIAL Address. . SE ee a ener e (Mention approximate territory de sired) Please Mention Popular Mechanics

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POPULAR MECHANICS

ADVERTISING SECTION

AMOTOR FOR Attach powerful Belt Drive ROLLAWAY to your bicycle. Forget ) pedals. Ride in com- | fort. ROLLAWAY gives > positive, dependable power. Light weight. Runs 100 to 150 miles on gallon gasoline. Fits any bicycle. Economical—costs less than one-fifth cent per mile to operate. Shipped complete. Anyone can attach in few minutes. Outfit includes mot- or, reinforced fork, wheel and guaranteed tire. Hundreds in use. A wonder for economy and per- formance. Price, F.0.B. factory $65.00, Write for circulars. Adds joy, speed and comfort to cycling. Be Our Salesman! Buy ademonstrator. Sell. Good commission paid, Write today for our proposition. Address The Rollaway Motor Co. 621 Shepard Street Toledo, Ohio

DISTRIBUTORS Wanted Big Money For —\*X_ ~ FORD OWNERS \ Steer your Ford with one hand at thirty

miles an hour over rough roads. Shoot through sand, mud, gravel, in and out of ruts and over car tracks. Your front wheels CAN’T turn and ditch you. Your Ford will stick to the middle of the road like a Packard ur a Cadillac if it is equipped with Yate The Wheel Trails | Ay

“MOSPICO SAFETY SPINDLES Give another driver just five minutes behind your wheel after you put them on your car. You've made a sale. No talking necessary—they sell themselves. Liberal profit on every sale. All or part time. Get Exclusive Contract For Your County Hundreds of Ford owners within a few miles of you. Most of them will buy after a five minute trial. Make big money wherever you drive your car with these and other fast selling accessories of our manu- facture. WRITE US TODAY. Motor Spindle Corp. ‘bevRorr’ mn”

Here’s your chance to own a real TIRE REPAIR PLANT AT LOW COST With prices on Western Adjustable and Non-Skid Molds now reduced to a mini- mum—with the mileage guarantee abolished by manufacturers and a contemplated increase in the price of tires—with us giving you complete instruc- tions tree " either in one (4 of our schools \@ near you, or Jk by our home aS > ie study course as - feo : ry ; —_> : ] - ) it s your ~ opportunity to ‘ . Lie / q get in the vulean- izing business ind clean up! Prices of the Famous Western - -- Equipment are v now even lower than cheap ‘First Seller’ equipment,

for an outfit repairing all passenger tires, yet the same higher quality of material, workmanship and design, is maintair ned. They are > the same idjustable molds— the same Non-Skid Ri ‘aders with prices in reach of the man with more am bi ition than money Write us at once for particulars and tell us all about your own desires, ambition and conditions in first letter WESTERN RUBBER MOLD COMPANY 315-323 N. CRAWFORD AVE. CHICAGO

OTN NOL EOP THIS atc) its FREE! Everything you need in Auto Supplies at C4émazingly LOW PRICES. NEMCO BARGAIN SUPPLY HOUSE 1017 Jackson Boulevard~ cate ALLL

ne ———— GET A RAZO! This unique Razor-blade pocket knife is the handiest, safest 2 eral utility knife. Uses an old Gillette blade. Artists, writers, draftsmen, tailors, dressmakers, office men, women, school children ali need RAZO, Send 25c for your today. Great money maker for agents. RAZO NOVELTY CO.

23 E. Van Buren St. Chicago

Davidson ampion Motorcyc PRICES REDUCED ONE HALF Rebuilt and Guaranteed 1915, three speed twin electric $125; 1916, $135: 1917 $150; 1918, $165: 1919, $180; 1920, $200. ‘Shipped on approval. Catalog A free, describing Harley-David- sons, Excelsiors, Indi: ans, Smith Motors at $40 ¢ ar ind

upwards. Liberty Bonds tak ug va dation from hundr of satisfied customers. R and Ha Davidson Motor (¢ Ra a rv mn 198 ! =Davi dds 2 parts 100 page PARTS WISCONSIN CYCLE SALES. COMPANY 726 NATIONAL AVENUE MILWAUKEE, wis. Oldest and Larcest *Milwauk Dealers in ‘ . : World's Carne t the North- Motorcycle Cent« weet

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POPULAR MECHANICS ADVERTISING SECTION 167 Every Good Musician Praises the KING OR more than a quarter century King Brass Instruments have been built to the specifications of world- famous musicians. Every King Instru- ment has the latest improvements — is built by an expert — and is thoroughly tested in our sound-laboratory before being shipped. That’s why Every Good Musician Praises the King. Perfect Instruments Easiest to Play Whether you are just learning to play or area finished musician you will find these wonderful King Soqeohencs, Trom- bones, Trumpets, and Horns easier to play than — other make. The wonder- ul tone-quality of the King is admired by everyone. It’s easy to own a King Instrument. They are sent on trial, and sold on easy payments. By buying from the factory you save all the middleman’s profits. Get Price List of Used Instruments We now have on hand a large stock of used instruments of other makes, re- built and refinished to look like new. They are sold for cash at very low prices. Ask for our list of used instruments, also for our catalog of new factory guaranteed Kings — Mailed no charge. The H. N. White Company 5238 Superior Avenue :: Cleveland, Ohio G” TINS eon: gst Electric Motors Delon *= sig manufacturer of electrical equip- ent canceled his order after we had mallmade. Strictly high grade, en- tirely new motors. Chance of lifetime to get motor to run sew- ing, washing, ironing machine: com- pressor, bench lathe, drill press, ete. Write for circular. = REYNOLDS ELECTRIC Co. 2610 West Congress St., , Chicago Satity Be A Floor. Surfacing | Contractor New uncrowded field. Contractors ) prefer to sublet floor surfac- ing to American Universal r ontractors. Machine does work of 6 men. Works quickly, easily We set you up in business of your own, furnish office forms, advertising, etc. Make $5,000 to $15,000 or More— Yearly Prepare for big buildi ing boom abe new floors perfect, old floors like new Ev floor a prospe Big money in o floors N too small Deaton often pay for ma- chines Grot mo: ath with profit besides. Get full information, | ms THE AMERICAN FLOOR SURFACING MACHINE CO. ) ) 523 Se. St Clair St Toledo, 0., U.S.A “104 PROFIT Fh N 3*/2 HOURS Barton, Indiana, made that amount— making and selling Candy Floss. Others send in amazing 5 bariness Small, Chicago, says-- “Did $125 business on Sunday. ad Wendel, Kansas, writes, ‘‘ Averaged $128 a day for3 weeks.’’ Gardner reports,“2,437 sacks of candy sold from 11 a.m.to 10:15 p.m. Bi Candy Floss! Rees says: in - Floss is a delicious, novelty confection--fluffy, soft as cotton, white as snow, or any color or flavor. Can be made anywhere -- in store iow, i c picnics, summer resorts, bas i games, or er crowds gather. Machine easy to operate edirsos Yor tee hiccrrated beck of fasts. Drop poe as for freei tra! ir tal. Act now! Address — > ae CANDY SUCCESS Lo -———— Saeeneae’ it = : 5 WO (SRINWIVL | i] | | (aera | Order by Mail. | — i WeWill Ship at Once! H| i | If your dealer or jobber i | ))| cannot supply you with | Mi i aCrystal Receiver,write WA i, | direct. List Price $18. |, )| Murdock or Frost head | | set $5.00. AntennaCom- WW | i pletion Package, $5.00. MN | )) Variometer, unmount- HS /} ed, $5.00. Send Post Hl |) Office Money Order : with your order. ; UNIT In this-—the first of Radioceptor Units— you find a receiver which combines improved electrical effi- ciency with beautiful mechanical appear- ance. A very unusual and exclusive design of variometer forms the tuner--giving great- er range of wave lengtii than variometers heretofore designed. Only one adjustment. Continuously variable. No overlapping. Details of finish include dark mahogany box, highly polished and engraved bakelite pan- els, buffed nickel parts. The Crystal Receiver, altho complete in itself, combines with other Radioceptor Units to form a high grade long distance set. KANSAS CITY RADIO MFG. CO. 605 Grand Avenue Kansas City, Mo. | Jobbers and Dealers—Notice! | | Radioceptor Units are sold only through | regular trade channels. Write today for our proposition. Stock Radioceptor Units NOW and ‘cash in” on the popular demand. Please Mention Popular Mechanica

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168 POPULAR MECHANICS ADVERTISING SECTION Recharge Your Battery as Home Charges Both AandB Radio Batteries Don't be with we of y + Re dio Re ‘ t is being weed. Get a iving Set while your arger d charge your Chasser to your home lamp socket rminals and 1 will urges y and the B 22% t B batteries may ’ wed S\TISFACTION GUARAN- TEI local distr r ot Bi. you, write direc t ‘Valley Electric Conpeny Department C. St. Louis, $1 300 *F O.B.S8t. Lonia This Mystic Gifaeee Symbol of Good L' Health, Happiness = Long Life has beenlook- ed upon with the deepest reverence by the Chinese for centuries. It ia is reputed by them to be almost uncanny in its power to bring Lack, ‘itiches. ee pe wave. Health and Hav pinces: Amazing stories of g © are told by Brings Fanny 8 Brice “Zigfield Follies Star, 2,000.00 in 48 Hours | This famous lar idol “*Forty- eight hours after i at = eee try Canoes Good Luck Ring, I received a check ic for $20 t was an entirely un- 3 expected present. I ait it tthe ‘best of luck.’’ An actor who had been out of work over a year signed a contract three days after he put hie r on. A mechanic om of ro fur three monthe el The -_—— = L an society. Worn by rich and poor alike. Millions sold “4 the larger cities. Every man, woman and child should ae J on — Ly 3 nav oe Good ties cee. at ~ UIs or Send No. ) Money Don’t send a pb Just whether for gentleman, boy . We will send you a solid Stert Good Lack Ring at once by prepaid p ou receive the ring send us $1. CHING LING FOO ] Room 1057, 538 So. Clark St. Please Mention Popular Mechanics TAPESTRY RUGS Excellent quality. Beautiful Persian Patterns Attractive colors. Size 54in. x 27 in. Easy to clean hard to wear out. $5 value. Just send name and address. Pay postman $2.79 and postage on delivery. Still bigger saving on five—$6.62 and a pair of 8-in. steel household shears FRE! THE HOME BEAUTIFUL Dept.52, 12W.40TH ST., NEW YORK Only keys of their kind in existence—open and test thousands of different locks. Thousands of sets in use among locksmiths, realtors, policemen, detectives, firemen, mechanics, “hardware men, travelers, hotel men, ete. Endorsed by all as an invaluable household necessity and convenience in emergencies. Tell you instantly if your locks are burglar proof. Novel chain FREE with keys. Send $1.00 today. We prepay postage. MASTER KEY CO., iiiwautee, wis \ Noh Best Shave yo u ever had Genuine Bancroft Hollow- ground Razor—with the Everiasting Edge. Direct from manufacturer. Shaves clean. No pull- ing, scraping or smarting. Makes your face feel fine The Genuine gancrorr FREE TRIAL Send No Money. Rush name and Address Pay postman $1.75 on arrival. Userazor10days. If notsatisfactory, money will be returned. FREE: $1 HORSE HIDE STROP For 30 days only we will give a genuine horse- hide double leather strop Free with each razor. ee ee 75 Qrder at once while they last. NCROFT RAZOR oom. 151-A West 19th St. w York FROM every standpoint —dependability, formance, quick starting, fuel economy, lightness, compactness, “and low price —the Michigan Marine Motor stands unapproached. Here is a 4-hp., 4 cycle, 125-lb motor, = guaranteed "for one year. It rarely vires adjustment and may be re- paired at o— Ford garage. Admirably for tenders, launches. soning | boats, and other craft re- quiring a full-powered motor of unfailing reliability. With Bosch Magnet« impulse coupling, $20 ex.ra. ~— by Michigan Marine Motor Company Spectal Dealer Opportuntty BELLE ISLE BOAT & ENGINE CO. Dept. |. ~~,

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ck POPULAR MECHANICS ADVERTISING SECTION 169 Make This Test Yourself Pick up a pair of Neverslip Pliers—moisten a piece of paper between your lips and fit it between the cutting blades. Then grip your hands. Clip! The paper is cut clean as a whistle. And you can bet your bottom dollar that a plier that stands the paper test will cut anything from a ten penny nail to the softest wire. Neverslip Pliers cut clean because their cutting edges are made from high carbon crucible steel. But should the blades be- comes accidentally damaged, they may be quickly and easily replaced—for they are renewable and the plier itself will last for- ever. That’s why Neverslips are guaranteed to outcut and outlast any plier made. Most hardware dealers sell them. Write for Leaflet THE NEVERSLIP WORKS NEW BRUNSWICK NEW JERSEY NEVERSLIP side cutting pliers Neverslip Pliers are furnished in 6—7 and 8 inch sizes. ky Z Huh! Give up? You fellows can’t shoot against me’n Little Scout Ho! Looky there—tore another hole in it. Just ’cause you fellows’re bigger’n me don't mean nothin’. Shootin’ don’t take size. Aw, don’t get sore, You-all could punch holes in the old can, too, if you had one o’ those Stevens Little Scouts. Come on an’ try it once. Golly, boy! Watch ’at tin can jump. Didn’t I tell you? Aint ’at Little Scout a bear? Take a squint through the barrel Pretty, pretty smooth, eh? You betcha! And you can just store this in the old bean: When a Stevens barrel is rifled, with each motion the cutter removes only the 30th part of a thousandth of aninch. Just jot that down. I’ve heard fellows say, *‘Gee, I'd like to have a rifle, but it costs too much.”’ Stevens puts a crimp in that bunk. Look at the Stevens prices. That’s your answer. Shoot us in a postcard. Simply say, **Send me catalog.’”’ J. STEVENS ARMS COMPANY Department J259, Chicopee Falls, Mass. Owned and operated by the Savage Arms Corporation, Executive and Export Offices: 50 Church Street, New York Retail Price, incl. tax, $5.40 Stevens “Little Scout.”’ Solid steel barrel, .22 long rifle, .22 long or .22 short rim fire. A real rifle with a real rifle barrel. The famous Stevens Guarantee Every firearm turned out by the ]. Stevens Arms Co has attached atagon which isprinted the Stevens guar antee. This tag is your in surance for Stevens quality ind workmanship. Read carefully this guarantee Stevens Pleas Mention Popular Mechanics

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170 POPULAR MECHANICS ADVERTISING SECTION

Genuine BUSCH Jagdglas $] §25 A five power, extremely serviceable, handsome and well made field glass made by Busch (U . (Germany), needs no in- mitone) troduction, as they are known the world over. These famous glasses up to a short time ago ewere unobtainable at any price. They are unusually light and com pact, made of solid brass, covered with gen- uine moroceo leather | and trimmed with hard rubber Solid leather | carrying case and Head Set No. 2509 for $16.25. for $8 OO f IMMEDIATE DELIVERIES ASSURED

he Nerco “Unitone’ Head Phones are desig Oo give equal tone reproduction through bot phones and to receive sounds sharply and clea hey are correctly and scientifically built receiving broadcast programs | Nerco “Unitone’” Head Phones have num« echanical features + hey are light, stable and have non-rusting d hragms They contain guaranteed tur ignets., IMMEDIATE DELIVERY ASSURED £ - HAIR in ten minutes. Cut the children’s hair in less time than it takes to walk to the barber shop Adjustab . for long, short, clipper-effect or pompadour. We practice meeded. Any style finished like YOU want vo SPLIT hairs. Cuts wiry, silky, kinky hair. Reversible for ONE-ARM men, right or left-handed persons. EASY SHAVES, smoothest you ever had. Two-way SAFETY RAZOR—safe for LADIES—new safety guards blade corners for working under ar over bumps, hollow spots and behind ears. Life-time durability. Genuine SILVER PLATE, complete with extra blade. Price $1.00. F in Canada $2.00. Try it 10 days—if not patiehed you get YOUR MONEY BACK. Sold through DEALERS or direct by mail upon receiy of price plus 10c postage. DEALERS WRITE. State Agents Wanted in U.8 and Provinces of Canada. Mention your dealer's name J. H. COWAN CO. Rees. 20.5-S ae ~COWAN SALES CO. OF CANADA $22, "ctatrre Block. Winninss: Mer

| “AND | SAFETY | | met WASTED HOURS tpentia | | |

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| POPULAR MECHANICS ADVERTISING SECTION 171 — Make Your Face Show ) 8 pall ae eo 3) "AME 7“ rt ; | Every Boy Wants RAMI he C: Pop Gun. A Bis he ng. Rust. ADDRESS Aan. | er endl auanitr ponanad ble decanter nas INSTRU ME NT — ALL METAL PRODUCTS CO., WYANDOTTE, MICH. a a SS a = a.

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172 POPULAR MECHANICS ADVERTISING SECTION Don’t Strangle Your Ford! The natural wear of the stem ends of the intake and exhaust valves, cam shaft, cam bear- ings and tappet ends of your Ford engine results in improp- er timing of the valves, which causes strangling of the mo- tor. New valves of the or- dinary type will not help this condition to any appreciable extent. There is only one real remedy— Pyromite Tru-Timing Adjustable INTAKE AND EXHAUST VALVES FOR FORD ENGINES your s not developing its full power, put on a set of “the se valves. They multiply power, quiet .he motor, and do away with periodical valve replacement. Pyromite Valves will not warp, pit or corrode. Learn how to keep your Ford Valves Fa timed. Write for our special circular ‘‘E’’ Co. Steel Products Mfg. Dept. S. RACINE, WISCONSIN District Distributors Wanted “HOW | BEAT THE GAME” The Inspiring Story of how one poorly paid garage mechanic won success, his own business and a big income. Tells how you can increase your salary from 100 to 500%. Send tor it today FREE. Ambu Engineering Institute Dept. 16-B 2632 Prairie Ave., Chicago, I. LOWEST PRICES We guarantee you saving on full lng fine quality tents. You con have a wonderful, healthy, care-free, economi- eal trip with our Moto-Tent. No Petes or garage bills pays for itself in 2 nights. Up in 5 minutes—no poles needed. Buy direct— our guarantec Sn 0° rotects you. Sx7 tt. $6,50, 12 !be.: 7x7 ft. @ummtate Qu $7. SO, 15 Ibs. Don’: buy till you get our circular. with R AMERICAN y a EQUIPMENT co. and Stakes 700 So. Crawford Ave. Chicago, 1 n. 10c. CHARGES STORAGE BATTERY FROM A LAMP SOCKET At HOME Or BUSINESS With An F-F BATTERY BOOSTER, which ies FULL WAVE Mag- netic Reetifier for 105-125 volt 60 cyele A.C. Leave Battery Just is in Your Car, Bra Cc — Clipe on Battery is, Turn Switch, & Battery il) be Charged in * «. AMMETER Eliminates All GUESS WORK. A ‘Dapplete Portable Automatic C ~~ Unit, with Infusible Carbon Rectifying Brushes, which Charges uninterruptedly. No Skill Required. A Fully Charged Rattery Starte Car & Truck Quick , thus fewer Expensive Replacement Storage Batterice must be bought, when kept Fully ¢ harged So It Coste Less to Buy « Booster than to be without one. Do Not Think Y our Battery dead and worn out sim - becauee it will not start your car. Buy a Booster Pi with Life and Hear Engine Spin. A BOOSTER SAVES you MONEY & Lasts a Lifetime Bantam Type 6 charges A 6 volt Battery, Gampe $15 Type B charges 2 to 100 Volt Radio B Batteries $15 Radio Type A-B charges Both A & B Batteries $20 Bantam | ype 12 charges 12 volt Battery 5 amps $15 ype 166 charger 6 volt Battery at 12 amperes $24 Type 1612 charges 12 volt Battery at 7 amperes $24 pe 1626 Combination Type Charges Both oP = — —— igpag Mo my 5 . 46 The Larger Types a: mmended f y Batte: where time is limited. Bhipping Weights Complete * with AMMETER. y BATT ERY ¢ "LIPS. 12 ry 15 Pounds. Mat Check for Prompt Ex ——. Or if for Parcel Post Shipment ar Aah yy qhereee. forward the Type Fe4 Te .] we F.. for TREE Descriptive BC Os ER BU LLETIN . For GROUP eCHARGING write aleo for Pree 5 ROTARY wee ity 1h, Balen 24-A,. 8 et yy a Commercially, Rectifies for Wirelese H oltages FG. CO.,” "CLEVELAND: OIG. U.S.A. Canadian ‘een Battery Service & Sales Co. Hamilton, Ontario, Canada RADIO MESSAGE FORD SPORT BODIES 16 Undersiung Fixtures Valve Heads 4-Speed Transmission Speed Differential Gears Crankshaft Counterbalanc: “YOU CAN BUILD THIS CAR” and enjoy the pleasure and thrills of motoring Ford-Speed” bodies will fit ar chassis and convert > into a poouteta car that will give you sport, speed _safet my honey wee cae, jolly vacation, hunting and fish ripe in “God's I res ol TDOORS sd four Passenger Bodies lete Speed & I Specialties. Good Dealers Pr. position. Write for catalog. Speci tes w thie ment) Price $15.00 $9.95 12.50 15.00 8.95 x i wer Can 19.50 9.95 Steel Wheel Disce (5 12.00 68.95 Satisfaction or Money Back Guarantee: Te s 5 with order. balance upon de L. T. FORD SPEED & POWER EQUIPMENT MANUFACTURERS 250 West 54th St., New York Cable Address “F ordspee: Every Day Travel for . Less than a Penny € V4 a Mile TORS Economical Practical One Man Transportation comets = wo-Speed ear Clutch Rider Agents ie Starter Wanted Spring Fork WRITE for CIRCULAR—M when writing SCHICKEL MOTOR CO., 6908 Garden St., STAMFORD, CONN. Pullman Sleeper can be made out of your Sedan or Touring Car. ~ Folds int very small package. Will last for years. Save hotel bills. Li out doors for better health and a good time. $14.50. Send: money. Pay your postman. VANDERPOOL CO. Dept. 6. Springfield, Ohio AUTO seems From Maine to California Bush Agents are making mone Mr. E.J.K.. in Iowa sold four in two weeks and got a Bush Car Free for his freight preps aid. r. Van E., in New Jersey made $400 in two weeks, Mr Maine, made $200 in One Day. These men did thie thie spring. No experie required. More agente wanted. Write for details. Addrese Dept. 6 BUSH MOTOR COMPANY, BUSH TEMPLE, CHICAGO Always Accurate — Carter Oil Gauge for For $ 00 and Chevrolet (490 and F.A.). Attaches to Inst: ment board. Connecting tuberuns to elbow wh eme SCTEWS to lower pc teoc k. Nomoving parts. Car =———= get out of order. Satisfaction guaranteed « money refunded. Carter Moter Accessories Inc., 390 Pearl St., Buffalo, N. Y. MAKE A MOTOR CYCLE OUT OF YOUR BICYCLE with FA STEFFEY MOTOR ATTACHMENT. RI ¥ LIABLE — ECONOMICAL — EFFICIENT Easy to attach. Fite any wheel. Send stamp for circula STEFFEY MFG. CO., Dept. P, 5025 Brown St., Phila., Pa. re ena on ST , A a

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POPULAR MECHANICS ADVERTISING SECTION 173 | BANOS a WATCHES ij -] One Year to Pay j \ |

n Amazing money. maine Bla es « t Quali enuine am a ata nd j DIAMON Get DeLuxe Catalog FREE. Explains easiest credit Terms and Money Back Guarantee cay first if you wish. One whole year to a Use Your Credit. ne this gain Catalog. NO WloindGo,izz States No Dela | q The Penalty of —_— Dry Driving— Doomanens positions, Good salaries. Oil! It’s the life blood of your motor. And yet

| for nny

Pleasant work. Generous vacations. it’s usually the most neglected factor Scored And you can study at home in your ot . “we ae r : spare time! World's biggest corre- | cylinder ned bearings, broken piston rings spondence school Individual instruc- and connecting rods—that’s the penalty of dry ticn, ‘Thousands of successful stu- driving. Don't guess you have enough oil in your aes dents. Write today for full details, - “ Ana ene: Ml International Correspondence Schools, crank case. Know for a certainty Pla Box 5646+C, Scranton, Penna. Oil is cheaper than repairs. BA. OF HS Heegyh || B esyoo. oveor te yo arty Hn WILL BUY

vd in your crank c - | INN. / A Standard, Guaranteed the hood and neil the red- “tipped w wire. N . — | - moe TYPEWRITER | |) sitet cede “Works en same principle ‘as cit |

With Every Modern Writing Convenience gauges on some of tl most expensive ears Write Today for Illustrated Circular Adapted to Nash and Buick cars as well as For Explaining Try-Before-You-Buy Plan 7 SMITH TYPEWRITER SALES CO. Send $100 today for your gauge. It may save int Harry A. Smith) 910-218 No. Wells St., Chicago, Ill. | ta repair bill to-morr

I i . | * | ee RAJO MOTOR CO. 32%! A jointed figt ofeckeiccn live 206 By pd. RACINE, WIS, hic in height will ance oO mrt € and perform vari. Geet ie | ous gyrations and sy <— rou movement. hil } Ve y eperaner anay, | = — e . : v1 »e some 2 i. roms S. fe. | *—- DANGER i Serpent’s Eggs \ Box contains 12 ; IE . St with wuns,12 cess, When A VERY striking and uncom ( one ©, Fradually hatches mon ring. Silver finish, skull and aes = crossbone design, with two bril- ' several liant, Bashing gems sparkling out of the x feet long, eyes. Said by many to bring Good Lack ) sad ic : : to the wearer, hence its name,Good Luck j curls and twists about in a most life- | Ring. Very unique ring that you will take fike manner. Price per box, 10c ppd. | 3 pride in wearing ONLY 25 CENTS. ) JOHNSON SMITH & CO., Dept. 840, $224 North Halsted Street, CHICAGO _

one | K | | rie | AGO je Absolut 00 ist Positively will give beneficial treatment for most ordinary ailments ‘and increases | so u e *. vh od ; ilat Stops disease destroying action and imparts « delightfully = ee ~ stimulating effect on the w dy | é SEND NO MONEY ro ec ion Just your name ar od vddress, we will send Home Outfit by 1 ‘ v “ me i »y mai rie $12.50 « nollie t—5 day etrial, Money back if not satisfactory.

ts Beneficial Effects Have Been Acclaimed by the Foremost Physicians

LE The prok bit ve prices of ether Yikes oo stuses ranging fre m $35 to $100 x , | have deprived thousands of the benefits afforded through their ed Be wed OIL GAUGE FOR } h Violet Ray Outfit will last « lifetime and will pay for iteelf many times in its ov, ¥ | RE health giving benefits, Write for booklet —it's FREE | ENT Guaranteed to Last a ) Lifetime With Ordinary Use | ond | | 318 ae aarsTANKEE LABORATORIES, INC. treet N - VW. , Pa. ; iow York, N.Y.

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174 POPULAR MECHANICS ADVERTISING SECTION Nosmoke. Nogrease. No sparks simple to operate and durable. Sn all compact and is only ar "Borne 3 LIGHTS eee WITHOUT MATCHES Build Your Own Radio At Small Cost You ought to have your own radio in your home or office to pick up the market reports two or three times a day. That’s business. Also to get the ball scores and the evening concert. That's pleasure. We will furnish you the parts and a free book of instructions. We have good stocks at present, but do not delay. There never was such a demand for anything as there now is for radio supplies. Write today for Illustrated Price List. Washington St. Northern Radio Supply Corp. “ Srienctort. BINOCULARS highest grade genuine im- ported FRENCH CONDE prismatic binoculars, in fine calf skin case with straps. 8 power; 32 mm. 23 Oz Dept. A. 542-544 West Special value in . Sent on Approval brand new; not war stocks. Over 1000 prs. sold last year. Drop us postcard for illus- trated circular. BARLER &CO. 644-0 WN. Lorry yaa Ave. CHICA SHOOTS 300 FEET ™ — The AUTO-LITE isa patented lamp that throws a powerful brilliant light 300 feet. Light with- outmatches. Not affected by wind or rain you need is carbide and water. Safe, sure Trouble Shooting Camping Boating : FOR Hunting Hiking Boy Scouts ly refunded. No questions asked his guaran- Fishing Auto Tourists Night Emergencies tee is positively unconditional Thousands in The AUTO- sve! s constructed of brass, highly use, among satisfied owners. ORDER YOURS polished nickel finish. Light in weight, yet strong TODAY. Mail check, money order, draft or 4 inches high. Can be carried in the hand: hooked on to the front of your hat, in your coat lapel, fas- tened on to emi ull pote: s hung up or stand . culsed. Hardware Jobbers to a ‘neers ‘at "a cost oi Universal Lamp Co Co. RNS NIGHT INTO .DAY ORDER ONE TODAY Its usefulness, merits and value are beyond de- All scription—must be seen to be fully appreciated and ORDER ONE TODAY. You can't go wrong If, for any reason whatever, you don't want to keep it, return it, and your money will be prompt- cash for $1.25. It will be mailed postpaid the same day your order is rece ived DEALERS AUTO-LITE lamps carried by all leading If your jobber cannot supply you, order —ian direct. T 1016 S. Wabash Ave. - _—CHICAG Oo lit BURN *CO nn ght we | Maas GAS In Your Old Wood or AL STOVES Change your co wood stove into a stove in 3 minut Child can do it. sur sene Vapor Gas—hott coal or wood and cost Safe and simple. FREE TRIAL Just t turn a valve and get even heat inst: intly. No as! dirt, no smoke, no wood to chop or carry. No fires t and feed. No fuel wasted Cooks and bakes bett damage to stoves. Makes its own gas from common cheapest, cleanest fuel. Guaranteed five years. Mo if not satisfied after 30 days trial Write for FREE folder with proof and SPECIAL OFFER SIMPLEX UTILITIES MFG. CO. 610 Simplex Bidg. 2537 S. State St., Chicago Real Baseball The Bambeen Sates Co., Dept.662 Toledo, Oh [YOU CAN OVERCOME WEAKNESS anc ILL-HEALTH This big, valuable book sent without ob! you in any way. Learn how to treat y« for ailments caused by disordered n« i impoverished blood or poor circulat | Build up cells and tissues to healt! tivity, banish aches and pains and er Cate poisons, Merely send request for FREE BOOK | 5.S. CAPE, 610 W. Park Pi., Detroit, Mich _ | | | ' A Simple Practical Dependable Extinguisher for only it—push it. can afford one orders a day—others FUGO Automatic Fire Extinguisher Become our licensed Exclusive Territory agent —employ sub- each one brings you a good profit > agents , , risk—you don't invest a penny. We deliver and col- lect—you receive commission same day you take orders THE OHIO INSTRUMENT MFG. CO. 9416 St. Catherine Ave. We Guarantee Our Agents $60 a Week| ONLY 4 mee A DAY No Delivering—No Collecting Commissions same day you take orders AT LAST MILLIONS OF PEOPLE want a handy, reliab ») ruishe but they've held off paying $15 or $20. The FUGO AUTOMATIC— just patented costs only $5 and is just as efficient, just as dependable as the highest priced. Ever agents take orders on every call demonstration sells it book 10 orders Customers so pleased they tell others—sales multiply fast. . Our improved instructions guide you—you ¢ an't ¢ No Experience Needed wrong—a 5 minute demonstration and it's sold. neighborhood fire department will recommend it—boost » | | reliable fire extinguish Nothing tike it at the price—a 5 minute no talking—no arguments. An inexperienced agent can tak: easily. No competition—the field is unlimit Get Our Plan-—TODAY You don't hear of an invent like this every day—don't dela Trained agents will jump at t! opportunity. Write mew for full particulars showing » ossibilities for YOU. Samy ‘ugo Automatic FREI You take no Cleveland, Ohio

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ee eee ee nl POPULAR MECHANICS ADVERTISING SECTION 175 Increase Your Store Profits $600 to $5000 a Year! Get These MONEY- MAKING Butter-Kist Facts! END the coupon now. Learn how to add $600 to $5,000 a year profit—new found money—to your business the Butter-Kist way. How to meet high rents and other expenses—make a big profit. Other merchants are adding $2 to $18 a day to cash profits. $50 to $460 a month. $800 to $5,000 ayear. They pay entire overhead expense, includ- ing rent, from their amazing profits. This has happened in thousands of cases. BUTTER-KIST | Popcorn and Peanut Machine Pops, advertises and sells popcorn. Also sells toasted and salted peanuts. You make 60c to 70c profit from each $1 in sales. Three to four times greater per- cent of profit than cigar counter or soda fountain. Capacity $1 to $9 an hour—$6 to $54 in 10-hour day. Wonderful success—turns waste floor space into cash for you. SEND COUPON FOR FREE BOOK I* explains how the Butter-Kist machine oe hon lay, in EAS | A } ag | ej Buy Butter-Kist Goodies Popcorn, peanuts, etc.—in the trade marked packages. Look for merchants with Butter-Kist Machines. They are good men to know. STULL LUE Le =yuunsuunnueenuesuueauueavuusnsanesnuenovensnengvensvengneegnensnengnin HOLCOMB & HOKE MFG. COMPANY 2014 Van Buren Street, Indianapolis, Inciana oe people: coaxing fragrance makes them ~ buy; toasty flavor brings trade for blocks; stimulates other sales; pays like a little gold mine. It gives new low prices, easy terms, and letters from Butter-Kist owners. Mail coupon now! Holcomb & Hoke Mfg. Co. 2014 Van Buren St., Indianapolis, Ind. World’s Largest Manufacturers of Popcorn Machines and Peanut Toasters PITT ) PUCEUOUEUEDUEEUUREO EER EOE EOEEOEEEEEEUEEOETE sl

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176 POPULAR MECHANICS ADVERTISING SECTION Grand Lathes Not a Toy---Just Like a Big One For either metal or wood working— ideal for auto and electri repair shops, pattern and model shops Because of their simplicity and compactness, we are able to build into each Baby Grand Lathe the same Quality that characterizes the finer types of big lathes—and at a price within the reach of everyone, everywhere Put One on Your maguuregh at Home

Baby Grand Lathes d i ” prov » mea f carr z jew ht v D> rk on either r lor wood, WONDERFUI FOR THE “BOY ; : ‘They are ligh mpact and simple to operate, but at t _m a att ghest . k prod i. ya Banenl feaitioe s he < isa wonderful help to the de at ' The } priced GOOD ‘LATHE ed. ever prod f\ Write for { Prices and« . Details ;

6 In. Swing 12 In. Between Centers 20 In. Sf ) Bed THE WATSON MFG. CO. 26 Post St., Toledo, Ohio jee g

——$—$_—_<—<<<<—__ AGENTS eines. Hichst quality of Approve quality of

Lightning Rod. More than 1,000,000 buildings now pro This is new. Nothing like it. Simply ore: tected. Fire Insurance Cost give reductions in rates Go into battery building business. Easy. Your Chance to MAKE a real Success No mystery about it. Demand enormous. Sell a necessary protective device for every exposed far Possibilities astounding. ayo gee gent op, ik We Rurann Hand ibastre well w va ht ‘ MONE ) RIDE TO SUCCESS ON RADIO WAVE Wr ato baer EY gh Every receiving outfit uses storage battery. “ST. LOUIS LIGHTN:? NG ROD ge Over six hundred thousand in use today. In- 2140 DeKalb St. St. Louis, Mo. creasing at rate of hundred thousand month- ly. All must be recharged often Repa oe ee | CRYSTAL RADIO SET, hy Se 75 EVERY AUTO MUST HAVE BATTERY | Craiiliias tneihdianbeaiiaiiae Almost ten million cars swarming country. All—even Ford have batteries. Car owners seeking money-saving bargains You can quickly learn to build guaranteed batteries. Can knock competition sky high and still make big money. This is your chance. Op- } portunity has knocked. Throw open the door. | Drop everything and get busy. Nothing to AA! |, ——<— stop you. MAKE YOUR- +h7

lead Te ‘ie e and Antenna, $5.00 extra Satisfaction guaranteed or Money Refunded CORONA RADIO CORPORATION 265 Canal Street, New York

oSEre © ©

LITTLE MONEY STARTS YOU wifes or mothers S—— We furnish everything needed. Fit you out wash tub into a - complete with boxes, plates, terminals, tools, WASHING MACHINE: distillers, materials, supplies and directions. ~ ert Our instruction course plain and simpk You Tt'schild’s play todo your week's wash in 5to 10 minutes—clear can learn almost over night. No business on without wear, with the Vac Cup Attachment. No electric or wat« . - 7 ‘ mie power necessary. Vacuum and suction principle—formerly the Dod earth offers greater « han es for success No ind Zuill Syracuse “*Easy.”’ Sent on 30 days’ free trial. Easy month business on earth can be started with so lit- payments if desired. Send postal card for how to save work. tle money. Don’t wait a minute. Get in on BURLINGAME MFG. CO. 622 Sunset Ave., Syracuse, N. Y. ground floor. It's the coming industry De- — aieeees ons teed mand for storage batteries never better. Market increasing by leaps and bound WRITE QUICK FOR DETAILS a proposition you « handle. Nothing hard about it. Pleasant, fascinating work. | We help you to the limit We have been in business over twelve years. Have put sands of men into business. We'l same for you. Write or wire today. aywood Hypower Batter ry Go. |

NEW PAT? NT 500 STOTT \\ ¢ load kK ‘ Se for a package of ¢ ng tel ry ots 1363 Haywoor AVE. INDIANAP moe gu Fe va co | ' ~~ Bho rtaewnn eer in 24 hours. THE IRVING A CO., 1636 So. Lawndale Ave., Chicago, lib ess

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— ————_ fib POPULAR MECHANICS ADVERTISING SECTION 177 is low in price because it is simple in construction i rosley Radio goods are quality | 1 . 4 " . } Crosk y .Rhec Stat Oo! ods. Quantity production is re- | vacuum'and filament nsible for the reasonable prices control. Thoroughly Yos ey S >. re efheient. Price 0c Crosley Radio parts. CROSLEY : , er ee Cisiitians Ten, i . cute te Sone | write catalog . . pertect contacts anda Harko Senior Receiver | Sgecei Crouiey bes Pictured Below vireconnectio: UW y } Price 40c. lh and detector => t amy lifier bring in 3 = es oncerts loud ar , . — : loud and Crosiey Model es) nead | es alone. The hook- ’ = / ey non-regenerative, efhcient, Variable , nomen = / Dk t mistake the low price ‘ ) ™m capacity =S4 ‘ ' te wie on I Simpler and better =e 7 — Detroit, a ‘ its jua ) . ‘ 17S os > ss hed we ral Chicago, Newark, etc., are . ess, $1./ rularly in Cincinati Pittsburgh is stantly in Minnesota and Denver 4 Schenectady nightly on i 5 ; . l nectad ghtly on this receiver Crosle porceiatt ol +. £ gs 3 Well built, finely fin vacuum tube socket, base or panel mount ing, 60c. 5 $20 ie the pric Crosley Sheltran. without batteries | Highly efficient. Ra hea phones or | tio of 9 t 1. 3a se area 1%4°x214". 214” hig! $4.0F f your dealer cannot supply you, write for our mplete Radio Apparatus and Radio Parts Cata- g and send us his name. THE CROSLEY MFG. CO. D t CINCINNATI epartment PM522 eune y

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178 POPULAR MECHANICS ADVERTISING SECTION ONN RADIO CONCERTS »Xctured here are some of the artists appearing in 2 » Radio Con bove—Frank Westphal's e , nbo n Orct c Simone Mann a 2 - Brass Cho Ra en € estra, Chicago ban Francisco S uphonium Soloist > rct THIRD OF NATIONAL SERIES—Friday Evening, May 19 ONN radio concerts have taken the nation by storm! Our programs of March 17 and April 14 by America’s leading dance orchestras and nationally famed soloists have occasioned universal admiration for Conn enterprise. Segre | er Isham Jones, Joseph Smith, Frank Westphal, Hal Nichols, D. C. Rosebrook and g Eugene LaBarre @ _ Cornet Sol ) their orchestras have already played; Benne Henton, Charles Randall, John Leick Mable Keith Leick and Fred Tait have given solos. More oftheir calibre are to appear Travelers on shipboard 1500 miles from the Atlantic and Pacific coasts, people in Northern Canada and in Central America will enjoy the same music which will be heard throughout the United States May 19. Think of it—Conn Ltd. is entertaining people by wireless a quarter of the way around the globe May IQ programs u ill be broadcasted from New York, Station WJZ; Chicago, Station KYW; Denver, Station ZAF,; San Francisco, Station KDN; Pittsburgh, Station KDKA Kansas City, Sweeney Stat Detroit, Station WWI]; New Orleans, Station WAAB; Seattle, Wash., Station KCB Conn dealers are entertaining at radiophone concerts. Watch for local announcement Write to Conn Ltd. now for new saxophone book; FREE. Tells why the Conn is the world’s finest, choice of the famous artists on the radio programs 631 Conn Building C.G. CONN, LTD. Elkhart, Indiana Agencies in All Large Cities Conn New York Co., 233-5-7 W. 47th Ste Conn Chicago Co., 62 E. Van Buren St Conn Detroit Co., 243 E. Grand River Ave. Conn Seattle Co., 1609 Third Ave. Conn New Orleans Co., 317 Baronne St. Conn Portland Co., 127 Tenth St. (Oregon) Conn Cleveland Co., 1220 Huron Road = Conn Atlanta Co., Auburn and Ivy Sts. = WORLD'S —— =H LARGEST MANUFACTURERS 4 =a OF HIGH GRADE BAND AND ORCHESTRA_INSTRUMENTS — 4.

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POPULAR MECHANICS ADVERTISING SECTION 1 A Whirlwind Summer Seller Agents Are Making Fortunes / N? wonder this amazing new in- vention is making fortunes for agents. Everywhere, this new de- vice is doing away with the muss, F. W. BENTLEY dirt and drudgery of coal and wood of Philadelphia, says: fires—saving housewives from e Gods--some seller. I roasting kitchens in Summer. It le $215.00 today.” turns any coal range into a gas stove—in just one minute. Then simply turning a valve instantly gives just as much or as little J. Carnegey of S. D., says: Am 1 ihr — : heat as is needed—only when it is t! ive made Dig . ei. but did not needed. That’s why the Oliver t so much, Your Improved Oil-Gas Burner is mak- Burner is just the thing.” ing fortunes for agents. You don’t need ex- perience to get your share. The device 19 sells itself upon sight. Send the coupon today for full particulars. rch f e ~ ——-~ 7 1ed | @ nvention Turn Fire on and off with a valve ind e t e é al ple vill UPPOSE vou were a housewife who sweltering Sun - hens, and the dirt of ashes . +¢ is the thing had to sweat and fume and fuss over ; a hot mussy coal and wood stove in a No Experience Needed to asting kitchen in J ily. You'd jump at Make Big Money the chance to buy a device that turned coal _You do not need to bea high-y red and wood stoves into gas ranges and gave ; he Oliver's ; gt ‘Or . . every agent we a t 2} ’ " you a cool kitchen all Summer—gave as too, Aen 'B much heat as you needed in the Winter easily. We and banished forever the drudgery of build- — we are i . . quickly. ing fires and emptying ashes. ee ae 1 , COUPON SRMNOS FULL OFFER That’s why housewives all over the Mail this « country are clamoring for this amazing making any extravagant tt We new invention. That’s why salesmen are don’t have to. W tt the : } 1: 1 fae BR ‘ Writi W not oblisg " : B cleaning up on the Oliver Oil-Gas Burner. ectien ar h well ey Ee. It isn’t hard to sell a thing that everybody wants. get an exc , — And the Oliver makes an instant hit with everyone selling right f because just by the turn of a valve ke a gas But hurry. Send 1 , t stove—it gives instant heat only when it is wanted. in a = a 1 : 2 R | An ther thing: The Oliver burns 95% air and 5¢ seller. oil, the cheapest fuel there is. It is not a mere kero- sene wic kb ax A new inver tion turns the ind OLIVER OIL-GAS BURNER air into gas t is the that burns. Now you & MACHINE CO. know why W. it Drew of Mick gan made $85.00 in ne day; why L. Zucher of Ohio m ade $21.50 in 3 2014-R Pine St. St. Louis, Mo. hours; why R. Burger of Ontario in one week earned 4 $258.50; why A. M. Russell of C yanecti t has aver- Oliver Oil-Gas Burner & Machine Co. aged $660.00 for the last 6 m« nths: w one order 2014-R Pine St., St. Lowls, Mo. sent by P.M. Ford of Iowa gave Hy a profit of Please send me full facts about how I can make $646.25. big money representing you in my territory Also your plan if | wish to make big money in my Quick lea dite Profits spare time. These men know a good thing when they see and they know that an invention that makes effec- Name tive use of the cheapest fuel and at the same time frees women from the drudgery of wood and coal fires, Address.......

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180 POPULAR MECHANICS ADVERTISING SECTION Establish a Profitable Business of Your Own With a small investment vou can install our Complete Dry Cleaning Plant which will not only yield you good returns, but will grow into a large establishment. There is a growing and profitable field for anyone in the Dry Cleaning Busi ness and we urge you to avail yourself of this un- usual opportunity of in stalling our Complete Dry Cleaning Plant. Order our Complete Dri Cleaning Plant at once, o1 write us for full informa tion. Itis our earnest de sire to assist and co-operat: with you. Many men have made a success of this busi ness who had absolutely no experience when they first started. We furnish the inexpe: ienced man with a guide t Dry Cleaning. Has an Earning Ca- pacity of $480.00 per Week Portable, All-Metal Fir

—= y J, A Practical Complete Power «©». eee /) Ly “ 7 : NS aE . 4 = roof Building wjth two wi we GO" on Dry Cleaning Plant dows, one door and gas-tight 4 ie 2 a motor box with outside door and oe sx URE, Se, ventilator, a 34 H. P. Motor ar -er-—— J 2 ae sae : . Overhead Transmissio 1, One Sis Suit capacity Dry Cleaner, One Six-Suit Capacity Extractor, One 50 Gallon ¢ ipacity Gasoline Filter, One Scrub lable, O1 Six-Suit Capacity Electric Dry Room, and Underground Gasoline Storage Svsten Price Complete, as per illustration, except pipes leading from tanks s Price of Plant « ynplete without the building, $360.00 This is not a toy; it doe the same high grad work as machines that cost more money and | designed to start you i the Dry Cleaning Busi ness with the least out

~ 7 lay. This Plant consist of One Four-Suit ‘ we . pacity Hand D1

Cleaner, One Four Suit Capacity Hand Extractor, One 25-gallon Capacity Gasoline Filter and One Four-Suit Capacity Electric 00 Dry Room Price Complete ; . TERMS Send draft or Money Order for 1g the amount with your order. Balance payable upon delivery. Exp orders must be ac ; i companied by U.S. Exchange for the fullamount. All machinery is shipped F.O.B. factor G. R. SCHMIDT WOOLEN COMPANY The Most Complete Tailors’ Supply House ' Woolens, Tailors’ Trimmings and Supplies, Cleaners’ and Dyers’ Supplies, Launderers’ and Hatters’ Supplies 900-902 Washington Avenue, St. Louis, Mo.

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ou ne isl to in- in yr ls| POPULAR MECHANICS ADVERTISING SECTION {yn i} Hi Mi or 7 IM Hi L Hi} ‘ies i : MHI ‘ Young man—you want A BET- TER JOB—more money—oppui- tunity—success. chanically inclined write me today—don’t bother about a letter — just postcard will do—or clip and mail the coupon. ake You an Amazing Offer lf vou are interested in mechanical work, if vou are interested in ORK, this Million Dollar Trade School offers you an opportutiity that may never com: u again. Will PUT EIGHT WEEKS’ TIME in this great trade school IF YOU ARE A RI king now MY BIGGEST AND MOST SURPRISING OFFER—no tter where you live—no matter if 1 have had no previous experience— rhow old youare. But I will ike this offer ONLY to those who are ifficiently IN EARNEST and SUF- FICIENTLY ENERGETIC to write me AT ONCE. The Sweeney System famous the world over, can be had only the Sweeney School. Trains men to be mechanics by practical work. You vt y doing—no books—you do the work. The course takes only 8 weeks. No place in the world can you get so much real instruction—so much actual value, for so little money. Over 46,000 graduates. Write me to- dav—don't put it off—I've got some / Pick the Job™~ You Like Chauffeurs $90 to $150 Truck Driver $125 Tire Vulcanizers $100 to $200 Welders $140 to $200 Battery Men $150 to $200 Aute Mechanics $6 to $10 a day Auto Electrician $225 Tractor Engineer $10 a day Garage Mgr. $150 to $400 Demonstrator and information that Ande wy your eyes— but you must take the first step— ‘\ Salesman $150 to and 4 Write for my Big Free Book With your radio experience here you can Good Jobs for You go back home and install receiving sets or sellthem. You can make sets for your- self. You can run a garage. You learn to make a good $25 Ford battery for $7.00. You learn how to weld a broken crank case. You learn how to make a real 4000 mile tire from old casing and rubber. You can be a chauffeur or truck driver. You can be an auto mechanic—a repair man in a shop or factory. Learn about stationary engines. Learn tractor work. Be a demonstrator or salesman. Hundreds of good obs open to Sweeney trained men F.ven before he finished his course Runsey was grabbed by the American Radiator Co. at $150 a month as an expert welder. I will gladly send my 72-page illustrated catalorue FREE. Also a copy of the Sweeney School News, a most interesting monthly school paper published here. You will enjoy them. icinerbtitenmeneideemibianall Read the worthwhile stories of men like yourself who came to Sweeney's and found success. Read bow Frank Powell and Harry Wilson built up a $20,000 business in about two years after graduating. Read how Fibert A. Pence built up a $25,000 yearly garage business. These stories and others are told by the Sweeney students. Also I want you to learn how my students enjoy themselves after work in the swimming poo!, club and reading rooms, etc. No colored students accepted. AL JOB AND A LIFETIME SUCCESS? Jecause of the demand for Sweeney trained men I am automobiles and W s and WILL, CONVING ] yy IT MEANS Free Radio Come to the Sweeney School and learn Radio work without a cent’s extra charg: Receive inosengee learn to build and install Radio sets —get agencies and sell sets receive messages from all over the world—all this is now part of the regular eight weeks’ course without ad- vanee in tuition W ho is the right man ‘to sell and install y these simple receiving sets The garage man or auto mechanic These sets are cheap and easily made. Learn how to make them. The Sweeney School is always the leader. That is why I am offering this great new levelopment free SMT OO PAP FALLOT) and Tractor Business KOH Te ty If you are me- N NY 1024 Sweeney Bidg. N Kansas City, Mo. N Please send me free with- tN out an) obligation on n ah part. your 72-page catalog and iis your Sweeney School News. Te!! me of the opportunities in the Auto

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182 POPULAR MECHANICS ADVERTISING SECTION at N\\}/ 1 | Hf} VW, | \K h This Beautiful Book on . \Wood Finishing FREE | IVES complete instructions for finishing all wood—hard or soft—old or new. Explains just what materials to use and how to apply them. Tells how inex- pensive soft woods may be finished so they are as beautiful -and artistic as hard wood. This book is the work of experts—illustrated in color. Includes color card —gives covering capacities, etc. JOHNSON’ S WOOD DYE Use coupon bel rw f ‘ re »p ; “The Prop Pr Johnson’ $ Wood Dye is very ecasy to } Lreatment for Floors, Woode eg and Furniture. apply—dries in four hours and does not It is full of valuable ideas on Wood Finishing and i “ Semen Reuttiivinc. rub off or smudge. Penetrates deeply, sess eese@eceeeaeeeaeseseag bringing out the beauty ot the grain. : 4S. C. JOHNSON & SON, Dept. PA6, Racine, Wis. \lade in fourteen popular shades, all of ty eee ad tne eee nreetion See which can be easily lightened or dark- | : — ened. Color card in book. ‘ ' ADDRESS “The Wood Finishing Authorities”’ Dept. PA6 RACINE, WIS. Canadian Factory—Brantford § CITY & STATE ' S. C. JOHNSON & SON 1 i | § Dealer’s Name.. SR a ee ee

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POPULAR MECHANICS ADVERTISING SECTION 189 | a wi J I A Young man—you want A BET- TER JOB—more money—oppor- tunity—suceess. If you are me- chanically inclined write me today—don’t bother about a letter — just a postcard will do—or clip and mail the coupon. i | Will Make You an Amazing Offer if. you are interested in mechanic: ai wack: | work, he capes you are interested in automobiles s end WILL WILL WORK, this Million Dollar Trade School offers you an opportunity that may never come to you again. Will you PUT EIGHT WEEKS’ TIME in this great trade school IF YOU ARE CONVINCED IT MEANS A REAL JOB AND A LIFETIME SUCCESS? Because of the demand for Sweeney trained men I am making now MY BIGGEST AND MOST SURPRISING OFFER —no atter where you live—no matter if J = uu have had no previous experie ee Pick the Job Free Radio no matter how old youare. But I will make this offer ONLY to those who are Come to the Sweeney At sufficiently IN EARNEST and SUF- You Like School and leart : Radio wi oe FICH ¥ rl Y ENBRGETIC to write without a cent’s extra charge me AS ORS, Chauffeurs $90 to $150 Receive messages—learn to The Sweeney | tre Driver sas fh and orl Baie oe Tire Vulcanizers receive messages from all System $100 to $200 |} aver the world all this is 10 } o ‘ egular ¢ rh famous the world over, can be had only Welders $140 to $200 ae 2 Se ee weeks’ « rse without ad- n the Sweeney School. Trains men to Battery Men $150 to $200 vance in tuition. Who is the ' ye mechanics by practical work. You Auto Mechanics right man to sell and install learn b »y doing—no books—you do the these simple > actual work rhe course takes only $6 to $10 a day The e s receiving sets garag man or auto 8 weeks. No place in the world can Auto Electrician $225 mechani These ecto ane ' you get so much real instruction—so 5 ches and sily mad much actual value, for so little money Tractor Engineer $10 a day 4 ; a a Learn how to make tl Over 46,000 graduates. Write me to- Garage Mgr. $150 to $400 TheS a So] | day—don’t put it off—I've got some Demonstrator and the leader. That is why f 1e@ leadetl hat is why ormation that will open your eyes— Salesman $150 to $500 fer , ' ‘ ‘\ f im orering his rrea hew u must take the first step— Soll . Ww rite for my Big Free Book. Geveropmen f Y With your radio experience here you can Goo Jobs or ou go back home and install receiving sets or sellthem. You can make sets for your- self. You can run a garage. You learn to make a good $25 Ford battery for $7.00 ou learn how to weld a broken crank case. You learn how to make a real 4000 mile » from old casing and rubber. You can be a chauffeur or truck driver You can be, an auto mechanic—a repair man in a shop or factory. Learn about stationary engines Learn tractor work Be a demonstrator or salesman Hundreds of good jobs open to Sweeney trained men Fven before he finished his course Runsey was grabbed by the American Radiator Co. at $150 a month as an expert welder j I will gladly send my 72-page illustrated catalogue FREE FREE Also a copy of the Sweeney School News, a most interesting monthly school paper published here You will enjoy them a ABI SS Read the worthwhile stories of men like yourself who came to } Sweeney's and found success Read how Frank Powell and Harry Wilson built up a $20,000 business in about two years after graduating Read how Filbert A. Pence built up a $25,000 yearly garage business. These stories and others are told by the Sweeney students Also 1 want you to learn how my | students enjoy themselves after work in the swimming pool, club and reading rooms, etc. No colored students accepted. EMORY J. SWEENEY President 1012 Sweeney Bidg. Kansas City, Me. Please send me free witl out any obligation on m part. your 72-page catalog and your Sweeney School News. Tell me of the opportunities in the Auto and Tractor Business

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eueuewese@eeweeeae we we ee eee ee oy «S.C. JOHNSON & SON, Dept. PA6, Racine, Wis. { Wood Finishing and § NAME ‘ ' ADDRESS..... f CITY & STATE ' | Dealer’s Name.. . . evecresvcesccvese This Beautiful Book on Wood Finishing FREE IVES complete instructions for finishing all wood—hard or soft—old or new. Explains just what materials to use and how to apply them. Tells how inex- pensive soft woods may be finished so they are as beautiful and artistic as hard wood. This book is the work of experts—illustrated in color. Includes color card —gives covering capacities, etc. JOHNSON’S WOOD DYE Use coupon below f ree copy of “The Proper Johnson’s Wood Dye is very easy to sreamment jor Floors, Woodwork and Furntture. apply—dries in four hours and does not It is full of valuable ideas on Wood Finishing and a > Home Beautifying. rub off or smudge. Penetrates deeply, bringing out the beauty of the grain. \lade in fourteen popular shades, all of which can be easily lightened or dark- ened. Color card in book. : : ! S. C. JOHNSON & SON 1 i Please send me, free and postpaid careinn U food { Be f ““The Wood Finishing Authorities”’ Dept. PA6 RACINE, WIS. Canadian Factory—Brantford

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POPULAR MECHANICS ADVERTISING SECTION 189 i LE “ie vl i HH | A. y itil i ' It] MAHI | NH | i} HI i] i Mi Hi NN HI Hl HH — —-—— a ala Young man—you want A BET- =, | a ah Pal KK TER JOB—more money—oppor- } . . |) tunity—success. If you are me- 4 chanically inclined write me ao, today—don’t bother about a letter — just. postcard will do—or clip and mail the coupon. = of * i will Make You an Amazing Otter a) oat if you are interested in mechanic: ieuk, work, Frame you are interested in natdenchiie s s and WILL WILL WORK, this Million Dollar Trade School offe ‘Ts you an opportunity that may never come to you again. Will you PUT EIGHT WEEKS’ TIME in this great trade school It YOU ARE CONVINCED TI MI ANS A REAL JOB AND A LIF I > SUCCESS? Because of the demand for Sweeney trained men I am making now MY BIGGE r AND MOST SURPRISING OFFER—no y/ . matter where you live—no matter if - ~ you have had no previous experience— Pick the Job Free Radio no matter how old youare. But I will make this offer ONLY to those who are Come to tl ™ » A y . pcos a on o e Sweene uto sufficiently IN EARNEST and SUF- You Like eel coud Senten aie anal FICIENTLY ENBRGETIC to write without a cent’s extra charge ne ON earn tae wae cc Chauffeurs $90 to $150 J Receive messages —learn to . ulld and instal iadio sets The Sweeney Truck Driver $125 get acencies and sell seta Tire Vulcanizers —receive messages from all System $100 to $200 | iver the world —all ‘this is now art of the regula rnt famous the world over, can be had only Welders $140 to $200 te ity course with A, a 7 n the Sweeney School. Trains men to Battery Men $150 to $200 vance in tuition. Who is the be mechanics by practical work. You Auto Mechanics right man to sell and install learn by doing—no books—you do the these simple receiving sete? : actual work The course takes only $6 to $10 a day The gar ae an he 8 weeks. No place in the world can Auto Electrician $225 mechani These sets are \ you get so mus h real instruction —20 Tractor Engineer $10 a day cheap and easily made. nuch actual value, for so little money. Learn how to make the: Over 46,000 graduates. Write me to- Garage Mgr. $150 to $400 TI eee = dayv—don't put it off I've got some Demonstrator and The Swe ney S i 1s always rmation that will open your eyes— you must take the first step— ‘\ Salesman $150 to nel 4 Ww rite for my Big Free Book > d f Y With your radio experience here you can j Goo Jobs or ou go back home and install receiving sets L or sellthem. You can make sets for y self. You can run a garage. You learn to make a good $25 Ford battery d ou learn how to weld a broken crank case. You learn how to make a real 4000 mile » from old casing and rubber. You can be a chauffeur or truck driver You can be, an auto mechanic a repair man in a shop or factory. Learn about st atic nary engines. Learn tractor work. Be a demonstrator or salesman. Hundreds of good jobs open to Sweeney trained men Fiven before he finished his course Runsey was grabbed by the American Radiator Co. at $150 a month as an expert welder. I will gladly send my 72-page illustrated catalogue FRI ~_ RE Also a copy of the Sweeney School News, a most interesti monthly school paper published here You will enjoy the ma. oO ques | {C8 te worthwhile stories of men like yourself who came to Sweeney's and found success Read how Frank Powell and st ‘ Harry Wilson built up a $20,000 business in about two years after graduating Read how Flibert A. Pence built up a $25,000 yearly garage business These stories and others are told by the Sweeney students Also I want you to learn how my ? students enjoy themselves after work in the swimming pool, club and reading rooms, ’ etc. No colored students accepted. . KAN EMORY J. yt SWEENEY | President - “ 1012 Sweeney Bidg. Vig Kansas City, =e. Please -~ me free w out an obligation on P". you Y 72 we catalog and your Sweeney Scho 1 News Tell me of the opportunities in the Auto and Tractor Business

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have beer doin« or country of whole lives. able made My exclusive surface. ‘ires up to 10,000 miles guarantee mileage.” MADE $1436 Tweedie, of Maine, sells $1436.00 in few short weeks; A. M. Amigo, of Santurce, Porto Rico, sold $4024.00 in seven months; Keighley, of Idaho, says: “I have sold $900.00 worth of tires since MAIL COUPON TODAY I took the agency and all FOR BIG have given good satis- faction”; Hinchcliff, Pitts- FREE town, Pa., sold $1,500.00 the first month; A. Frank- BOOK! lin, Pennsylvania, _ sells $600.00 a month. Ye) |) Od) ee: 2 ee ee Mr. B. L. Mellirger, Pres. Mellinger Tire & Rubber Co., 1045 Oak St., Kansas City, Mo. Without obligation, send me detuils of the Mel- linger Plan, Free Book and Wholesale Prices and how, without investing money, I can become your authorized agent. Name. Address Earn and Bank Big Money started so many others, The Mellinger Plan is revolutionizing the tire business. Different from anything vou ever heard of. shipped prepaid on approval. of tire buyers have been looking for. t Guarantee Your Profits tET ME PROVE we vers CAN — FROM $100.00 TO $400 ONTH. don’t ask you to risk one poe AN an asset, not an expense whether you live Storekeepers, garage men, clerks, fi urmers, young fellows discontented with mere sople got this Mellinger Plan a daa over night made a financial success that changed their If you want to know the quickest way to make real money get my BIG FREE BOOK TODAY. Guaranteed Agents Wanted Start Money Rolling In by the Amazing Mellinger Plan in a business of your own. next few months golden flood Whether you want guaranteed mileage prices, write today Rut have all gone down prices and tak ke your car t care what you in city or I don’ jobs, all sorts Get the discounts amaze everybody tires for less money Mellinger Agents Get bead gives 10° ew construction Patent No. 68612, greater wearing I specifically guarantee by legal bond, Mellinger Ninety-eight leading Manufacturers say: ““We do not Mellinger guarantees mileage. This picture shows the MASTER SALESMAN. I send this sample Kit ab- solutely Free Literally FREE iakes them buy substantially bound portfolio c ontaining good size san iples ot fabric, cord, rubber, cross sections cut from tires and pure gum tubes. In 5 Minutes you can demonstrate tire secrets that the average dealer knows nothing about. This Kit was developed by a Mellinger Agent who sells over $50,000 worth of tires annually He says: “It’s like taking a prospect thru the Factory. The Kit sells the prospect and I take the order You have everything you need This Star Salesman’s but I will gladly send it to you in dead earnest. if You Own a Car! to start right in taking orders Kit is very expensive Free if you are WRITE ME QUICK. Don't buy anyone's tires unti! you see these amazing values— see these tires on your own car. THINK OF IT. Oversize Cord Tires for less than fabrics used to cost. if there is no authorized Mellinger Agent in your locality, | will want one owner to show and recommend Mellinger Tires. I will ship this magnificent Cord Tire prepaid. For a little of your time and enthusiasm, I wili make you a sur} rising offer that will give you a set of tires FREE. Be the first from your locality to get my Confidential offer. Mail the coupon, today—right now; tear it off now. It’s your big opportunity the golden key to thousands. DON’T MISS IT PLAN saves car owners big without risking one cent I will start you, as I have Begin all or part time. A positive proven success No previous experience needed. No risk. Save car owners money. Tires Just what millions Piles up profits for Mellinger agents. One Billion Dollars You c will be for tires ir spent the an dip your hands into this out want CASH, CASH, CASH, or simp tires for yourse lf at LOWER yber, Get the all the money you hee cotton, labor, chemi facts. Buy at whealensll See how the MELLINGER money. My new low prices my inside figures Setter makes business just roll in for here's a BIG REASON WHY by Bond 10,000 Miles Mellinger Hand-made, Oversize, Cords and Extra Ply Tires are the finest, most service- Super-vitalized rubber makes riding easy tread, protected by U.S Absolutely Guaranteed. Get this free book that has pr B. L. Mellinger, President MELLINGER TIRE & RUBBER CO. 1045 OAK STREET References: KANSAS CITY, M%. Any Bank or Trust Co., or Any Publication

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