Popular Mechanics 1924-06: Vol 41 Iss 6

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25 CENTS ‘POPULAR ioe MAGAZINE offered for IDEAS SEE PAGE 8i3

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e an Auto an pe EX; = Sweeny Trained Men in Demand at -20 to sJ50 a Week Here’s one instance of the success McSweeny Training has brought thousands of men: George W. Smith, West Alexandria, O., has earned over $800 a month ever since he finished his training. He now owns his own garage and auto agency. When Smith came to me he knew nothing about autos. In eight weeks my methods made a big-money man out of him. And there’s no reason why any boy can’t do just as well. Pu Pay Your Railroad Fare to Cincinnati and Board You for My Full 8 Weeks Term Ige ameeowere es: ay from garages, battery stations, auto factories and so on, for McSweeny-trained men. Albert Boyer, of Alexandria, Ky., is only 19 years old, but has been making a big success in his own business. He says my training made him win out. To fill the calls on me for trained experts, I’m making this wonderful offer for a short time. I'll pay your railroad fare to Cincin- nati, and board you for the full eight weeks. In S50 Days Youre Rea to Command a Big Pay 2955, e 4 ) 4 4 ¢ ‘ 6 ¢ 4 ) 13,000,000 Autos and 1,000,000 Tractors must be kept running. Spend 50 days in my great shops 6 and no job will be too hard for you. Big wages and steady work certain. “‘ McSweeny training §@ made me Chief Mechanic ofa big plant in three months,’ writes Fred Pendley, Blowing Rock, N.C. ’ e ‘ ‘ ‘ ) ) ‘ ‘ . ‘ ) Electrical Course Included Every one of my students receives a complete course in practical electricity. He learns igni- tion, starting, lighting, power plant and generator wiring—all by the same work-shop job- methods which teach him all about carburetors, transmissions, vulcanizing, battery construction and repair. He learns in 50 days to tackle any machine, in any condition, and “‘put it on its feet”’. “Mac Trains Men With Tools ~Not Textbooks You Learn Under Experts in a Wonderful Shop I have successfully managed more auto and tractor schools than any man in the world. Now I am in complete control of the former Rahe Auto & Tractor School, of Cincinnati, Ohio. Now I can put into complete oper- ation many ideas and plans which, I sincerely believe, will make this the greatest Auto, Tractor and Electrical training institution in existence. Write me and I'll “The Mcs School” tell you what this splendid school can mean to YOU, to your payenvelope and to your future. Write Today for Free Catalog & Special Reduced ' Tuition ay fo fou MeSweeny Life Scholarship. | r Se 1 eee 1 Auto, Tractor & Electrical Shed” Dept. 145, Ninth & Walnut, Cincinnati, Ohio ‘ Send me your Big Free Book on auto and tractor business, and @ send me information on special reduced tuition offer, in effect for a short time only. ] NINTH & SCH ectricat same WALNUT STS. OHIO ! Street or R. R... CRE GF TOs oc ccccccecccscvescovessesouet te ' e * os . * * * + & o @ ® « e « * * * * * e * ® * e * * + S . * * *

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POPULAR MECHANICS ADVERTISING SECTION nell os : = — “THE AUER IS FULL OF THINGS YOU SHOULDN‘T M18 8*° —_ =~ “oon s - . ‘ Pd ?. eee oF j No. 7111 ; Everead » a Dry Cell ; The best battery f or use with dry cell tubes a No. 766 “B” Battery, 2234 volts More Power for Summer Radio Wuen you take radio away with you—take Eveready Radio “A* and “B” Batteries, the batteries whose great power lasts longer. Re- member, summer's the time when radio signals are weaker. Batteries do get used up in time. The ones you've been using, though partly exhausted, may be satisfactory for the strong winter signals, but are probably inadequate for the weaker summer signals. For a “B”™ Battery use the familiar standard 2214-volt Eveready “B” Battery No. 766. It has variable taps for “soft” detector tubes. Put two, three or four in series to provide sufficient power for amplifying tubes. To light the filaments of your dry cell vacuum tubes for the longest time, use Eveready Dry Cell Radio “A” Battery No. 7111. The Ever- eady “A” willastonish you by its long-sustained vigor. It is advisable to use two Eveready “A's” connected in multiple for each WD-11 or WD-12 tube—this gives the “economical eighth” ampere drain per cell which insures maximum economy and longer life. For sets employing one to three UV-199 tubes use three Eveready Dry Cell Radio “A” Batteries No. 7111 connected in series. The greatest electrochemical laboratory known created these famous dry cell batteries on which radio largely depends. The experience of thirty years in battery making stands back of them. Buy Eveready Radio “A,” ““B” and “‘C” Bat- teries—lively, peppy, long-lived producers of power. For your light-weight sets to take camping or on hikes, Eveready has suitable small batteries. Manufactured and guaranteed by Nationat Carson Company, Inc.,New York, San Francisco Headquarters for Radio Battery Information Canadian National Carbon Co., Limited, Toronto, Ontario Informative and money-saving booklets on radio batteries sent free on request. If you have any questions regarding radio batteries, write to G. C. Furness, Manager, Radio Division, National Carbon pany, Inc., 207 Manley Street, Long Island City, N. Y. Radio Batteries ~they last longer

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And the World Once Jeered Their Efforts | | THE NATURE OF THE FIRST | THEEMBRYOOFTHE | ELECTRICITY COTTON-GCIN' REAPER FRANKLIN || WHITNEY MSCORMICK / i CE NSS 8 =/% / - : a. ~ T i _— i - a 2 is = v t) . 7) \ 4\ - hh ‘ o] $4} A Ais | THE FIRST SUCCESSFUL THE FIRST LOCK-STITCH THE FIRST SUCCESSFUL TELEGRAPH SEWING~MACHINE TELEPHONE {MORSE THE FIRST SUCCESSFUL FLYING-MACHINE Resa

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Popular Mechanics REGISTERED IN U. S&S. PATENT OFFICE Magazine WRITTEN SO YOU CAN UNDERSTAND IT JUNE, 1924 $78,800 Offered by Industries for Ideas Nationally Known Industries Co-operate to Awaken Inventive Genius of Country Copyright, VERYONE has in- ventive ability because every man, woman and child at some time or other has ideas which they put to practical use to save time, abolish drudgery or to add to their own hap- piness. But, be- cause of lack of appreciation of their value, many such ideas lie un- used and forgot- ten to the loss both of the inven- tor and humanity hom they might have proved of ines- ble value. re than a year ago Popular Mechan- Magazine conceived the idea of the istrial Award Plan to awaken and con- rate the enormous undeveloped inven- the country to aid in the tion of unsolved problems of industry. idea has been carefully worked out the details in the following pages are result, ery branch of modern industry con- y is facing new problems that cry lution and every advance made only s up further fields of research, as Ger- Swope, president of the General Elec- ompany, declared recently. Although ely fifty years ago there was nothing ical in industry, he says, no genera- motors, transmission lines, lights, nunication, or traction, today elec- is doing the work of 170,000,000 and every step forward has opened e highways for achievement and suc- To meet these conditions, to bring forces of 1924, by H. H. Windsor together the manufacturer and the inven- tor, to promote a better understanding between the two and to arouse and direct the undeveloped inventive genius of the world along the most profitable lines, Pop- ular Mechanics Magazine has obtained the co-operation of several of the nation’s lead- ing industries who have outlined some of their problems and offered tangible cash rewards for satisfactory solutions. While it is true that a few of these problems have defied the efforts of expert engineers, hi tory records that many of the greatest in- ventions have been the work of men with little or no technical training who there- fore were unhampered by tradition or prejudice. Pasteur, who discovered anti- toxin, was not a doctor. Bell, who in- vented the telephone, was not an elec- trician. Morse, father of the telegraph, was a portrait painter. Charles M. Schwab, the steel master who started life carrying a water pail, declares that hardly anything that the human mind can conceive is impossible of accomplish ment. Edison was a train “butcher” Whitney was only visiting in the south when he conceived the idea of the cotton gin; Goodyear, after years of toil, found the way to vulcanize rubber by accidentally dropping a piece of gum on a hot lid. In fact, chance has plaved a leading role in epoch-making discoveries that touch the life of everyone. Who, for instance, conceived the notion of dropping aniline dye in water and selling it as violet ink? Somebody dyed cloth a wrong color, and washed it with alum ina vain effort to correct the error. After it was dry someone else tried to wash the material but could not even wet it. So waterproofing was invented. The glazing of pottery also was discovered by chance. A servant girl fell asleep while watching a pot of boiling brine. When she woke up stove 813

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she found the pot was glazed. The man vho put the hump in the hairpin made thousands of dollars just by the flash of thought The inventor who thought of pointing the ordinary wood screw got more for that idea than many a man has earned by working hard all his life. Soft glue used for making printers’ rollers was discovered by accident. Lithography also was the re- sult of chance. Repeatedly, THE MAN WHO DID NOT KNOW IT COULDN’T BE DONE won out after experts have failed. With all these things in mind, Popular Mechanics Magazine has found business men ready to co aperste with the Indus- Award Plan. They hav e off red $78;- 800 for your ideas, outli bad tl and stand ready to payvt | who send the has r problems “ awards to m satisfactory now the persons POPULAR MECHANICS Paul Curie Demonstrating the » Discovery of Radi um before ‘the French Academy of Science in 1898 Yellow Cab Manufacturing Co. No. 1—$50,000—Traffic Safety e Yellow Cab Manufacturing Company, supply- ins cles to 815 yellow ib operating companies m the United States, offers an aw 1 of $50,000 for a per- te ! an, including regulat mechanical devices, the promotion of greater street safety in the tie f this country This offer expires May 1, 1925 The plan of traffic and pedest n correction and regu lation ust be of such caliber to recommend its adoy tion | it least two of the x largest cities of the United States and must have ha qualities suitable for improvement of trafhc management in cities ol any size solutions. None of the offers are to subscribers or to those who bu magazine from newsdealers. Anyo: take advantage of the opportunit: ! not hesitate to send in your ideas cor ing any particular problem simply b« you know nothing of the technicaliti volved. You may have the right ide manufacturer can hire men capa working out the details. As the object of the Industrial Plan is to bring together the manufa¢ and the inventor, Popular Mec! Magazine obviously cannot act as a all negotiations being left directly to t offering the awards and those sub: ideas. Our part ends when we ha‘ you what the industries desire. A fe the problems follow, others will be | in subsequent issues: A he successful solution must materially supple1 iggestions grouped in such comprehensive trat is have been made pwhblic before the first pub! the present offer. Address Yellow Cab Mar 1 West Dickens Avenue, Chicas Company, 58 Lyon and Healy, Inc. No 2—$10,000—Musical Instrumen t Lyon and Healy will undertake the manufa an entirely new and original design of musi ent that can be made in their piano factory guitar factory or their band instrument factor design may be very simple or it may be an el one. It must be a genuine musical i

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POPULAR MECHANICS Beginning of L the Lathe | | Built about 2 ys 1862 by Blan- James Watt, Inventor of Cc chard to Make the Steam Engine, with ; Rifle Barrels His First Model : About 120 B.C. i this Ancient Turbine Was & Invented by Hero, a Scholar Steam Traction Engins« Constructed by Cugnot, a _ French Army Officer, in 1769 “Mogul” of Early 18th Cen- Hand-O , tury Drawing Ancestor of De a pe gg .uxe Passenger Trains Pre N lc At, y Newspaper Ago

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S16 onsidéred and must be such that it will be welcomed nto the ranks of orchestra or brass band players. To the inventor of an instrument which gains the indorse- nent of this organization, the donor offers the following rms:' They will enter into a contract to make and se ell the instrument and will award the inventor royalties from the sales until such time as the royalties aggre- gate the sum of $10,000, when they shall cease and the imstrument and all patents covering same shall become the sole property of Lyon and Healy, incorporated. No entrants connected in any way with Lyon and Healy will receive any consideration im this offer. _ instrument must be submitted as a working model, s« the comimittee can judge of its value as an addition to the present family of musical instruments. No ideas, plans, sketches or blueprints will receive consideration. We must have a okonkte model. This offer ends my A 1, 1925. Examining committee will consist of W. F. Kirk and H. H. Windsor, editor of Popular Mechanics Magazine. Address W. Kirk, 4110 Fullerton Avenue, Chicago, Illinois. POPULAR MECHANICS Benjamin Electric Mfg. C Everhot Manufacturing Co. No. 3—$500—Mechanical Improvement The Everhot Manufacturing Company, making a gaso- line-heated blowterch and soldering and branding iron ombined, will pay $500 for the best suggested improve- ment on its product that meets the requirements and is adopted by this concern. No. 3A-—$200—Best New Use This firm will also pay $200 for the best suggested new use received before May 1, 1925, the date these offers expire. In addition to the above, cash payments, n proportion to their value to us, will be given for all suggestions having reference to the production, dis- tribution, and use of our products, not already known to us, and which we will adopt. Address Everhot Manu- facturing ,;| Company, Maywood, Illinois. o. 6—$250—Making Electric Stan Lamps For the most practical and workable method, termined by our engineering department, by whi jamin stand lamp clusters can be anchored to st forms of vases, urns, etc., including covering and ing of openings, thus converting them to elect: lamps, we shall pay $250. No. 6A—$150—Lamps from Old Vases For the most practical and workable method, termined by us, of attaching Benjamin stand lan ters to vases, urns, etc., with the aid of ordinary rials usually found among stocks of electrical cont and lamp dealers, $150 will be paid. No. 6B—$100—Advertising Plan For the best scheme or method by which electri: dealers can stimulate the business of converting urns, old lamps, etc., to modern electric lamps, the Benjamin stand iamp clusters, we shall pay This calls for a workable, concrete sales promotion which will attract customers desiring old vases made into electric lamps. These three offers close ) 1, 1925. Address, Advertising Dept., Benjamin | Mfg. Co., 347 W. Jackson Blvd., Chicago, I! Problem Number LR-2 Problem Number AM-1 No. 4—$500—Preventing Waste of Zine In operating a brass foundry there is a considerable loss of zine at the furnaces. Zinc quidiens freely and while being meited, oxidizes and passes off in the form of a white cloud in the air. It is obnoxious to workmen and frequently causes illness. The loss of zinc that es- apes thus is variously estimated at from three to ten per cent. If any way could be devised whereby this zine oxide could be saved and reduced to the metallic state again, it would mean a great gain. This donor will pay $500 for a practical solution of the problem, und one which they would adopt. This offer will end May 1, 1925. Add;ess Problem Number AM-1, Popu- ar Mechanics Magazine, Chicago, Illinois o. 7—$5,000—What Shall We Manufacture? A_ splendidly equipped factory manufactures wood rims similar to those on wheels of bicycles. | ties and spécial machinery permit of a large i: over our present production. We can manufact sizes from 14 inches to 25 inches out-to-out d and in cross section, any shape that can be made { 1% inches wide and % inch thick. Possibly could invent 'a product in which these rims could corporated or an existing product could be in to use these rims. For a bona fide plan or pro} that will solve our problem and one that we adopt, we shall pay $5,000 when the idea h successful and satisfactory within a reasona Offer expires May 1, 1925. Address Problen LR-2, Popular Mechanics Magazine, Chicago, Ilg Electric Ventilating Co John J. Harris and Company No. 5—$1,000—-Waterproofing and Sales This concern makes paste known as “‘Bull Grip” hav- ing practically universal application as an adhesive. It can be used as a library paste, a glue, a cement and a mucilage. The adhesive and cohesive properties of the ompound gre exceedingly strong It will cause a thin trip of metal to adhere so strongly to a piece of wood that it will sustain the weight of several hundred pounds, and will cause like substances to cohere og tully. We desire the best way to n arket the oe uct in wholesale quantities among manufacturers who can make use of it. We also wish an coousmaiall method of making the vaste waterproof. John J. Harris and Company will pay $500 for a solution for each of these problems accepted by them, and which is received prior to May 1, 1925, when the ffer will end. Address John J. Harris and Company, 4035 West Kinzie Street, Chicago, Illinois. o. 8—$5,000—Uses for Ventilating Fa: We will pay a total of $5,000 for ideas sug novel and practical uses of lig motor propeller fa: automatic shutters, Ilg blowers and Ilg unit heat: In paying for suggestions their value will be mined by novelty, and usefulness; the more widel suggestion can be used, the more we shall! pay | The amounts to be paid for suggestions will ; range from $100 to $1,000. All suggestions w looked over carefully and those that cannot merit ment will be returned; those adopted will be pai promptly. We will be sole judges in determini suggestions that are useful and their value to us. © ends May 1, 1925. Address Ilg Electric Ventil Company, 285) North Crawford Avenue, Chic Jahn & Ollier Engraving Co. No. 9—$500—What Is “Relief” or “Dry Effect”? Frequently on plates developed in pyro-soda, phot raphers find shadows raised in relief. This occurs 1 with wet plates, than when making a Velox print.

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POPULAR MECHANICS i "i pes ii i hil i Hy Sl I ws \ NIN % \ \ L Whitney, Inventor of the Cotton a. Studying a Crude e Great Industry; Morse, Father “Set” Was Born of the Machine that Revolutionized a Right, of the Telegraph in His Lab- oratory where the First ail Early Form of Telephone glass is coated with albumen so the film will not ff the plate, and left to dry. Then it is covered odion, which “‘sets,”’ and is put into a silver ni ith to sensitize. E xposure is mz ade while the plate and after washing, it is “fixed’’ in a cyanide of im bath to clear away undeveloped silver. fixing, it is intensified by immersion in a solu- f sulphite of copper, washed and placed in a nitrate er solution Some claim this operation is the f dry effect.) Following intensification, the nega leached with a solution of iodine made solub le line of potassium and water. It is then cleared weak hath of cyanide of pota assium to bring out es. Washing, and bleaching with sodium sulphide Some such negatives are treated with a solution ury and blackened with ammonia sulphide, ind a weak mixture of nitrate acid used to clear ins left by ammonia sulphide. A solution of lissolved in either benzol or gasoline is applied the plate dries. Over this a coating of collodion is which consists of alcohol, ether, gun cotton and vil. The film is separated from the glass by im in water for a few minutes. It is then stripped i a and printed on sensitized copper. It is th dry effect shows. For a process that will ! “dry effect” successfully, we will pay $500. No. SA—$500—Color Separation ver of this magazine is reproduced in four-color from an original water-color drawing. The inks n printing are yellow, red, blue and black, requir- ir different plates. When photographing the orig- rawing, filters are used in front of lenses to sepa olors. For the yellow plate, a purple filter is used nate blues, purples and magenta reds and to em e yellows, orange and yellow green. An orange used for the blue plate to strain out all red, d yellow and to strengthen blue, green and cold Greenish yellow filters are employed to make lates, eliminating a little of all colors and empha blacks or neat blacks Last, for the red plate, a filter used, eliminating green and near green ing strength to red, pink, deep orange and violet lates and emulsions have not proved entirely tory, especially the plates and filters for the We will pay $500 for perfect improvement processes. | is tor a on Bell's No. 9B—$500—Etching Process In making a halftone plate our to get a true and absolute photographic the copy. By staging and fine etching, out a more or less mechanical reproduction and _ lose photographic values. A high negative could be made and staging Pre away with, but you would lose in the middle tones and light middle tones, and again lose copy value. If we could turn out a finished plate and a true reproduction of copy, in a one-depth “bite” (of the etch ing a it would result in a great saving in present cost. Offers 9, 9A and 9B expire May 1, 1925 For such a process, we will pay $500, Address J & Ollier Engraving Company, 554 West Adams Street Chicago, Illinois greatest problem is reproduc tion ot you could turn ahn The Imperial Brass Mfg. Co. No. 10—$500—Electric Iron Attachment Design—An electric he successtully and interchange the Imperial self-heating ga design we shall the designer Brass Manufacturing Company will trants irons at and refund such deposit, if and when the returned in perfect c n, within a reasonable time \The closing date of this offer is May 1, 19 Add mperial Bra Manufactur Company, 1200 West. H: et, Chicago, [lit te rt g element that will opera with the base and cover iron. For an accepted $500 The Imperial inge to send et atir soline Ss pay art factory cost iron is nditi n Stre Bassick Manufacturing Co. No. 11—$100—Chamois Skin Waste In cutting line strainer from sheets av We will pay $1 ably disp ends May 1, Company, wut chamois raps eragzing 10 tor are ?05

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POPULAR MECHANICS { soda founjains where the cooling will be de: liquid meqium at average temperature of t Liquid Carbonic Company above mt Bod designs subject to sole judg gm

company th our offers will end May 1} dress Liq pid Carbonic Company, 3100 S enue, Qhicago, Illinois.

No. 12-$1,00Additional Uses of Product | The Liquid Carbonic Company will pay $1,000 for the ce Lumber Mfrs ’ Ass discovery of a rzew use for carbon dioxide gas or for improvements to present uses that will produce for the company additios al gas sales of at least 200,000 pounds a year. No.) | 13—$2 ,000—Salvaging Waste No. 12A-$1 000-Freeze- Proof Soda Cooler The unifed lumber industry through its San ’ National Lumber Manufacturers’ Association annual award of $2,000 in a series of payments de

This concern will pay $1,000 for an automatic freeze- proof soda or water cooler for soda fountains, this cooler best, most jconstructive and most practical sugs to have sufficient! capacity to care for average two-hour for salvagihg the lumber which, for one reason peak load of fifteen gallons of water and soda per aoe other, dropk out of sight and is lost somewhere and to be proof against freezing during normal ay oe the time thf tree is cut and the time the lumbe 1er no-load periods. This cooler must be adaptable to eit M the consumer Address National Lumber M he so called “‘iceless’’ type or mechanically refrigerated ers’ Associqtion, Washington, D. C '

HERE IS THE PLAN on, donor shall make no use information given, provided nothing herein contained shall 1. All offers of awards made, and all solu tions of problems submitted, are subject to these terms and conditions, except where they are in conflict with or modified by the terms ior trom using any solutior of the offer In that case the offer controls. lea, v r information which donor knew } j id the right to use before the such entrant's >. The or otfering } ward is hereinafter I | | r lonor of alled the onort and the one submitting a sshetion he entrant.” Any patent on, or any patentable feature All proposed soluti« s} nailec f it's solution accepted and p: : e < , ‘rein provided, shall belong to the l ’ and entrant shail assign to the all y tl ward to the nor any such patent already issued and any ered as directed Lits ol of done ention for such a patent on which appli problem whi is complete, practical and eco- r ns ll have been made And e illy sound and satisfactory, to, and not t, at donor's request shall execute al nomic: l already known to, the donor such applications, assignments and other : documents as may, in donor's judgment, be the period of one necessary or expedient for the purpose of proposed solu- obtainmg a patent on entrant’s§ solutior case it be or any teature thereof, such patent to be is- ! sued m the name of, and to be the sole prop- erty of the donor Mechanics Magazine shall or commissions, directly or blishing any offer made partment, nor for anything it ectior therewith And the be he ld respor obligation extension 0 th d r shall ir? ither of a ! i i The pul entr ' he solution subn ] , ! nsibility ith the publi 11m suct by | offered.) CcrT Dear Sirs Enclosed find I hereby submit 1 lished in said magaz ics Magazine nditions pul ADDRESS

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POPULAR MECHANICS {AT HORSE CAN PULL SHOWN BY TESTS IN ENGLAND ts made recently in England proved pair of horses, each weighing 1,600 ls, could haul a load 550 pounds ter than themselves. On a metal track, of these animals, it has been shown, draw one and two-thirds times as as on a good asphalt surface, five much as on cobblestone paving twenty times the load it can pull on an nary mud road. For the usual type of | horse, a cart carrying a weight of 0) pounds is considered to be a fair While pulling light vehicles and ler saddle, records indicate that horses equal to great feats of strength and lurance. A _ twenty-year-old beast hed to a light cart is known to have eled a hundred miles in less than thir- and a half hours and was in excellent dition at the end of its journey. es aS AUTOMATIC CAMERA WINDS UP ITS OWN FILM ROLL Double exposures and “blanks” are pre- nted and a rapid “fire” of six “snaps” in many seconds can be taken by an auto- itic camera now on the market. By ins of a spring motor, concealed in the e, the film is automatically wound after ch picture is taken, thus preparing it for next exposure. The operator does not e to worry about turning a key. It is pecially valuable in outdoor photog- phy, in catching glimpses of parades, therings and other scenes where quick tion is necessary. The motor does not terfere with taking slow or time expo- res, is easily wound, strong and reliable. Front and Side View of Automatic Camera Showing Motor Con- cealed in Regulation Case 819 CHARCOAL GAS RUNS CAR SIXTY MILES AT SMALL COST Propelled by gas generated from the combustion of charcoal, an automobile in France was driven sixty miles at a cost of Charcoal Gas Generator that Supplies Power, Is Placed Where Driver Can Tend It twenty-five cents. Thirty-three pounds of the material were required for the trip The gas was produced in a compartment built into the body of the car. The experi- ment was pronounced a success. SPEED OF GREAT CITY TOLD BY STARTLING FIGURES Statistics for the city of New York show that an immigrant arrives at that port every thirty seconds and an avert age of one arrest is made each two minutes. A child is born every five minutes and a funeral occurs every seven. Every twelve min utes a marriage is performed and a divorce is granted for each six hours of the day. New businesses are started at the rate of one every forty minutes and a failure takes place every five hours. A ship leaves the harbor every forty-five minutes and someone is killed by accident every fifty-five minutes he crime records of the metrop olis are startling in that they show that every attempt to take a suicide is committed hours, and a murder occurs ever 3 twelve hours. seven hours there is ar s lite each tet some person’

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Oo rvU ELECTRIC GENERATOR WEIGHS QUARTER MILLION POUNDS estimated o1 83.000 itput oft riant turbogenerator ns Brooklyn, N. has pow er Part of Giant Electric Generator which Will Eighty-Three Thousand Horsepower Produce house. When completed, it will weigh 260.000 pounds and the cost is estimated at nearly $1,000,000 the ‘“aVY parts The shipment of required much ingenuity POPULAR MECHANICS WORLD FLYERS’ STORES CAC! ALONG ISOLATED ROUTES ‘7 snable the around-the-world states air service’ ti heir planes, stores of rts been cached stretches of the have ate d scheduled so as to pa the w: about durin: ill be Suft Greenland summer when the seas w t ice toes to permit landing ocean fligl ts, pontoons are attached ships at the start changed ror clear 0 ot overseas laps landing gear of wheel journeys are t l cross-continent 1 AKC! vit around the earth to six sections Each The airway is « division has base and one or more ing and sub-depots ci principal items ot supply, wl oil can be had at practically all Scattered at various points along the r ugh engine replacement part complete motors an le sections to build four pontoons are stored will he to water-covered areas. The of the route is 878 islands of the Japan group, and the aps where flving betwee: 1 muies, _ est stretch is 127 miles in California SECONDHAND PAVEMENTS FOUND GOOD AS NEW Saving in ps ving c sts has heen effected cutting and sl al In One citv by re shaping that had been roughened bv constant wear fhe edges thirtv-vear-old cobble stones trimmed oft and the large blocks, little damaged their long ce ot underneath the surface by service, were shaped into smaller convenient ng hauling old taxpayers yard in they were pres lage ] } ‘ ] 1] piace and t cracks filled stones mately contract they pavement pron ‘ally as “good as Laying Stones and Filling the Cracks in New Pavement of Secondhand Blocks

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POPULAR MECHANICS ATORS BACK TWO WHITE STREAM LINE LIGHTS om SMALLER COMPARTMENT SED FOR MAPS PONTOON WATER ET FOR GREEN LIGHT ON RIGHT \ 7 . . FT .\ WIND DRIVEN EARTH ee ee ee INDVUCTOR OmPASS USED I-2+3 INDICATE GAS TANKS CAPACITY FOR NAVIGATING PLANE 450 GALLONS FOR IB HOURS FLYING —— { ; Skeleton View of One of the Four Douglas World Cruis ers Showing Special Equip- ment of Planes Just Before ““Hop-Off” Circle the Earth; Ma Martin, Flight Commander and Sergeant Harvey with Squadror *Flagship”’ Coast-Guard Cutter “*Haida,”’ W hic h Patrolled One of the Ocean Airways to Give Aid to Flyers es a

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POPULAR MECHANICS LIGHT RAYS PRESERVE FOOD AND VITALIZE §& rel det attacks. so ame given ‘ ’ ‘as and cornme “e an hour in the vital the process, is ‘ accomplished | vithout bein imply by leav- be kept indefinite ing any perish- able article a piece certain length | : of time beneath ; she a sheet of lal specially con- structed glass

Inventor with “Vitalizing” Cabinet and Foods Being Treated Note Lenses in Roof over Piece of Meat at

ee 1 | | mmf, at

} 1 \ Califori ides that pasteurized milk. may it | putting Oils and dry materials may be le vides tl itainers The Tt required 20,000 bacteria per cubic centimet lepend vitalized milk is said to contain not Conta l \ 4 ] > ] ¢ desired Vitalizing aiso 1s said to caus ' 1 | s ma tiew he ut < veek, ( pon the article ul ‘ + : v. oI y vigorou biect to 1trom sprout quic on during

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POPULAR MECHANICS T INK PRINTS ON BREAD PHOTOS OF SOUND TO IMPROVE rO REDUCE ITS COST MUSIC AND RADIO idvertisements have appeared in Photographs of the e form of bread bearing printed by musical instruments pressed upon the dough before explain the merits of a wide products. Money the baker \ti from the “ads” is expected to re- cheaper loaf for the purchaser, irge distribution of the bread is . point in favor of the advertiser s “space” on the loaves. The said to have been approved by inspectors. A secret coloring ma used for ink. Baking the bread is darken the printing, making the ore distinct. MOTOR CYCLE IS CATTLE CART = eee aaa ake toate FOR TRIPS TO MARKET nvs'which Registers Waves Produced by Sound ul live stock to market, a farmer in alias , _— . apparatus and are recordes built a roomy crate on the frame ; , an curved lines on the photog: tor-cycle sidecar. The pen which Sitienes tend ahielel os + 1} ~ ) ) al *( al trong wood, accommodates a large ; study of the quality and has a compartment for egg bv instruments of vari also been used in researc] determine the charactet ] ] up by different ki STAKES FOR HOLDING PLANTS HAVE ADJUSTABLE LOOPS plants are Ke from being blow1 iver by adjustable upports loops h Farmer Transports Cattle to Market with a Pen on Motor-Cycle Sidecar other produce \ gate at the sas an entrance and a halter tied ts holds the animal steadv while ne l motion k GAS SEEN IN LONDON FOG poisoning” is the term applied to tion that attacked a great number lren in London last winter. A investigating the cause, is said discovered in the 1ogs so otiten ing that city, varieties of mustard other poisonous mixtures similar e used in the great war hese elicate parts of the nose and throat.

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rmance that Requires Expert Horsemanship and Well-Matched to Travel at Even Speeds and with Equally Measured Steps Horses that Go to School How Training Classes for Animals in Mounted Services Make “Scholars” and “Athletes” of Army’s Equine Soldiers reduce the size of cavalry services his preliminary work well, the your + THOUGH the Great War did mucl signals of his patient master. It 4 “- es matt ned by mulitary vanizations, t , 1S rewarded by affectionate care but if he is slow or rebellious, he back to his stall to rest and quiet aration for another day's grill ont inder the mo mounted soldier 1 iil a highly sary early release to the picket line or ' : rsh words

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POPULAR MECHANICS tt »p Mounter” in a Thrilling Cavalry Stunt Taking a Specta } — lar “Spill” as the Galloping Horses Pass over a Hurdle | &

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POPULAR MECHANICS A" It wondere od & Underwoo Sutin Laws of Grav- ity, and on Insecure Footing, Rough Riders Thunder through Their Perilous Drills Amid Clouds of Dust

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POPULAR MECHANICS Start of Pushball Con- 4 test Where Horses and Riders Display Fearlessness and Ex- pertness in Rough | Tactics of Game Co —_—— Performing D Gymnastics during Hurdling”’ Exhibit of Program Ca ilous Risks to C

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POPULAR attentive men Ww ho surround them Romance and idventure QO with the | ] *. I ry Cavall apparently stirs his blood and thrilled by the voice of his rider, he dashes into an ordered charge with all the vim and action of his highly trained body While it is generally held that at least two vears of service in the ranks are neces Sary to perfect the education of the average horse, many of them become adept in the performance of difficult tasks in much less time. With shining coat, alert eve and eir ind muscles of steel, they participate in the gymnastic “monkey drills,” aiding the icrobatic pertormances Ol the riders with intelligence rivaling that of the most expert veterans of the circus rin: lo ix iired off and teamed in fours, they take their ices, Irequ¢ nt! it an early age, In practice for Roman riding and the spec tacular tactics that make up the thrill and excitement of “rough riding,” | urdle rac y , 1 +) e | l-« One of the most admired movements of ell-trained cavalry mount is that of two-tracking, a gracetul performance that co t ft running sideways, cross-step { r hot mta hind teet. while travel ido é t is seldom found in horses ot YS those u ed by officer Mik ¢ HANICS the entire leng Ing his mount to the rigl t or te the army training accustomed the activities of streets and noise of traffic Phe the traffic squad undergoes an \ amid an almost constant din of sou are designed to accustom him to bells, railway trains, automobile the roar that will greet him wher his place in line of duty In a becoming a good rider, he is taug!] little tricks to assist his master it order at times of emergency The police horse is trained to the rush of mobs by swinging hi force back the front line of suc! \t a touch of the spur he may e his hind foot in position for a never lands, for that is but part tactics to intimidate persons it with his rider, or threaten those too near for his safety. In the s he has also learned that little da him lurks in ponderous busses a that pass noisily. Under the attention of his mentors, he is t1 ignore the sudden rush of met whom he is driven, in imitation of on a mob. Boxes and barrels a1 from platforms, papers are ti thrown into the air about the hor and he is even punched with clu struck by small pebbles cast fro tance to harden him to the thing meet in nl career. FISH ARE SUPPLIED WITH BY PERFORATED STRAINER While transporting the vou hatched each year in the governme: eries to stock the streams of the « water in the shipping cans must be to prevent the young fry being suft This is done quickly with a per strainer with a hooked handle of o ter-inch pipe that serves as an Che attendant places his thumb o pipe after the strainer is inserted can, then elevates the dipper o bucket. Water is carried up is released through the holes thumb ts taken awa\ Falling into t pail, it aerates the contents, and the removal of sediment (ne repetitions of the movement are to give the ‘ i ish a supply ot tre i A M

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POPULAR MECHANICS E-BARREL FOUNTAIN PEN RITES IN TWO COLORS ng in two different colors, a h a double barrel has been ] fluid 1Y OF CLEANERS KEPT BUSY IN RAILWAY TERMINAL of the largest railway termi: ork City, where traces of mill st be erased and hu ind miles of walls wasl men are employed for t ; ‘seer . MINIATURE STREETS USED IN COURT EVIDENCE In courts to spe ed up the takin: Litt t Street Corner Designed to Facilitate the Presentation of Evidence in C Traffic Violation Cases; the Figures Are Adjustable

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830 POPULAR MECHANICS TRUCKS QUICKLY LOADED FROM REAR BY PO\VEp The essent the equipment is a winch mount s just behind the driver of being driven by the motor. \ the loaded platiorm into ‘onsiderable saving in time and labor is process is reversed. ra power-loading apparatus in- platforms are’ chassi n raised to reaching a destination, the Loading round and then pulls

Loading Log Truck by Pulling Filled Platform over Rear; Diagrams Below Illustrate Working Pri: Winch Run by Motor and Winding Cable Attached to Sliding Body REGULATOR FOR AUTO LAMPS PREVENTS SUDDEN GLARE be placed on the steering rod or in board. Graphite has been used t: the resistance so that the regulat injured by the shaking of the car ing the light in this way is said longer life to both batteries and lai Even transition from faint to bright light to prevent the blinding effect when the automobile headlights suddenly are switched fully on, has been obtained in a patented regulating apparatus which may SALT IS TOUGHER THAN S& Strands of wire made from ordi salt by a Russian chemist are re]

(LR x

\\ » ir) —\ \ a ». Sig wen \ \ \ — \ > Qh . ao <* ae

Diagrams of Headlight Regulator Atta Wheel and to Instrument Board ched to Steering be tougher than those of steel. ventor expects the process to aid ening and strengthening commo! and believes that the treatment, it to other minerals, may result in that would permit moving machi travel at much greater speeds. T! tist is said to put raw rock salt ut heat pressures, thus changing its fo: increasing its flexibility and stre:

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POPULAR MECHANICS IILES OF AERIAL TROLLEY MARTIN LUTHER ) SPAN BOLIVIAN PEAKS BIBLE DEFIES THE RAVAGES OF TIME bout 3,700 feet, and at high 1.600 teet above sea level, what | aerial trolley line 1 is bein: y Sd | \ construc compa \ O CTOSS it Caracoles, Bolivia. It will be o, and is expected to take six ) complete Steel will be worked round, and the trolley line itself material ft or its construction mm FOREST-FIRE WARNING GIVEN BY MEASURING MOISTURE ng of fire danger in forests trument designed by M. ] + of the Forest Products Labora idison, Wis., and H. T. Gisborne, ; 1e IMxperiment River Forest 1 7 | . issoula, Mont. The device meas- rest floc ing ‘an be esti TOOTHBRUSH IS EASY TO CLEAN AS BRISTLE ROWS OPEN ade | é nt for Measuring the Amount of Moisture in rest Floors to Foretell Fire Hazards rattan which expands and con- ith changes in the moisture cor the material with which it is in con registered by a STAINLESS STEEL IN JEWELRY /USTING GOLD IN EUROPE 7 7 5 | 1 eel jewelry is said t irity in Europe, replaci ind earrings, hatpin ‘lasps il does not stain or tarnish readil ing worn much with black evening lhe ornaments cost less than the ls and are easily replaced

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POPULAR MECHANICS GOLD “MINED” FROM BUFFERS J ticularly sharply banked deviat SAVES THOUSANDS YEARLY the original line of flight. Wh« ing body is deflected from a str the “d ” throw1 ff a centrifugal force is developed. tendency of the body to tollow Che greater the speed ‘r the deflection, the mor lhe result is tl Via nakes a sharp turn, the | ply to the brain is drawn away, « sciousness. Ifthe force wer h would result. Ol jewelry butters, GOLF CHARTS TEACH STR‘ AND STANDING POSITIO? » check the game of experie teach beginners, a inted with directions howing correct st ps and strokes, an has been devi ed. mn in golt read a less« the same time. llow it at tl imeiahs. Ghithinemad & 1 heavy paper, the charts are to Operating One of the Gold-Polishing Buffers in < Jewelry Store in hand, the plaver 1s able to get t ; grip and position and execute t ich year tor many firms. ; ; ; In correct 1orm. Che diagram estern company saves more tl each year in this Way. Che coy P the butting wheels is made of 1 on the floor. Standing over them + lavers of linen, small bristle materials, to give the various ired. Irom time to time, the ashed and treated in acid an irrounding the machines is gat] bjected to an acid bath aluable particles. LIMIT OF FLYING SPEED NEAR PREDICTION OF SCIENCE How fast can a man fly, and live? With the increased pertection ol} design, particu- 1 + arly as regards streamlining and other methods of cutting down and the invention of new and more power- ful motors, the question becomes of vital importance. If it were merely a matter of mechanical skill and engineering knowl- aviators say that a speed of 1,000 an hour would be possible in the -future. But the human factor enters field, and, accordin authorities, a

man traveling at such a pace would be in a ’ in ak Neintesee Gane Sikes ceuaad ’ ete grave danger ol losing his lite It would Reading Printed Directions on Chart and not be the straightaway flving that would Golf Stroke at the Same Time imperil the aviator, savs Maj. L. H. Bauer, commandant of the sch of aviation constant check and means of com; I medicine at Mitchel Field, L. I. The real for accuracy in every detail. The danger would occur in making turns, par- can be used at odd moments at hi

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POPULAR MECHANICS Anglers Lured by Spring to Haunts of Trout Wary Game Fish of Lake and Stream Sought by Boot-Clad Sportsmen Armed with Rod and Reel

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POPULAR MECHANICS Some of the Fish Will Be Kept for Permanent Exhibits Used to Re-Stock Streams or for Hatcheries whether the fish he has’ teeth is found on the front and harr trout, part of the roof bone of the 1 in the mouth holds in hi and a salmon trout a double row of | only a single patch is found in t this bone, called the vomer, the t-harr. Another and even surer w ing them apart is by the size of t Other differences are found in the of vertebrae, the form of the gill « width of the jaw, the dey elopn ent pectoral and caudal fins, and the of gill rakers, a series of bony app along the inner edge of the gill ari The salmon trout are divided into series, mostly found in the west. cutthroat series belong the Colum! trout, the Yellowstone trout at others. There are four forms int head series, including the popu called “salmon trout” of the Pacit lhe rainbow series, among seven includes the well-known rainbow the coast range, and the famous trout of Mt. Whitney, the latter beauty. To these twenty-four the salmon trout may be added t! or German trout, now more common in eastern waters, the Laven trout, introduced from SS and the European sea trout. There are thirteen species species of native charr trout in A waters and two imported varietit Europe, the Swiss lake trout Aquarium Group of Catfish Showing Their Spiny European charr pd saibling. : “Feelers” Used for Digging Up Food species include the well-known

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POPULAR MECHANICS

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POPULAR MECHANICS Placing Lincoln Park Catch in Storage Tanks before Shipping Them to Lakes and Streams; on Long It Is Necessary to Keep Water Fresh by Aeration peckled trout, the Great Lake, the Dolly tributed 18,000,000 whitefish, Varden, the Sunapee, the blueback and wall-eyed pike, 500,000 lake tro several others not so well known. salmon, 60,000 rainbow trout The charr live and thrive in lively waters, other varieties to the waters and in whatever stream they may be, they Michigan and neighboring strea eek the higher reaches of it to spawn. If Fresh eggs for the hatcheries the mouth of their home waters connects from the lakes or obtained fro1 with a salt estuary, just as soon as the ice They are shipped in wooden bo forms in the stream the trout go down into with two trays that hold a total deeper haunts and subsequently migrate \ muslin bottom in each tray and adapt themselves to a life in salt water. injury, and wet moss and ice kee] Here they lose their brilliant coloring and cool and moist. Unfertile eggs | become more robust in form. The brook removed from the fertile ones and trout is not only the most beautiful and care is taken to assure fresh watt } active of the American charr, but it also. tanks to prevent smothering the is the most widely distributed. In the wriggling fry that soon appear. middle west, inadequate game laws, devas- tion to the hatchery, the aquariu: two da and the im- a ' r possibility of policing large fresh- areas have a and t threatened to ar % to fish make the trout tropics and the _ pike ; tanks, almost as rare , ’ forty 1 as the buffalo. ed on tl But the situa- A ey } floor, tion is being » into the relieved by a J , mE . of the number of ' Their aquariums, and Be are line in one season : — Meg colored tanks of the ; and f Lincoln Park ideal quarium in Chicago con- tating sewage 001 devot Sorting Out Different Kinds of Fish from One of the Hatchery grown . Tanks with Small,Scoop Nets occu]

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POPULAR MECHANICS ENCH PULL-SHOVEL BACKS AWAY FROM WORK use of mats as the ma- ot lus give it greater has been made for ~wers. It is driven nd is mounted backs away 1 firm ground, has to straddle the wT h Pull-Shovel Which Backs Away from Work, Needs No Mats and Never It Is Mounted on Crawler Treads and Driven by Gas ‘URE THAT BARKS LIKE DOG IS FOUND IN BRAZIL ires that bark like dogs, fish a cabinet,a ed with a poison spike and vampire article sa\ ore were among the curiosities of reported by Capt. S. C. Bullock in read before the Royal Geographic in London, as having been en- red in his expedition to northern The vultures were described as black, except for the breast and un- of the wings. In one instance, ogs shot by the explorers fell into ream and were torn and eaten by the ich jumped onto their backs. CHAIRS ARE HIDDEN IN TABLE WHEN NOT IN USE pactly fitted into one useful article usehold furniture, two chairs and drawers are included in a patented ith two large extension leaves. not in use, the chairs can be folded | slid out of sight under the table. eaves, when detached, can be used ll shelves for storing dishes and, in provide sufficient space so that ten ‘ a can be seated comfortably. he eae eo

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POPULAR MECHANICS VM ~ apitid! " 7 ‘Ap | P oe ~° ar Frm aos | ‘ P a oi. re ey } itn *,! it ‘ sates a “anh att) anes am , yiie. vt ‘ie “a ur 744 Be ‘ "| bi (wh vf Obi. if: or + gilts niny? syn } $y Be Hal ig bent a ;

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POPULAR MECHANICS f Modern Golf Enthusiasts Watching Championship Tour re “Shots” Are Lengthened and Putting Aided by Skillfully Desi nament Ov enti er Si ( ned Clubs ar Golfers’ Skill Improved by Science Steel Clubs, Balanced Balls and Level Greens Replace Pebbles and Crooks of Scotch Shepherds Who Invented Game te of the fact that golf is hundreds ears old, it has o1 ly been in the past that science and craftsman- succeeded in improving players’ 100 per cent over those of l centuries ago. Although the sport neient when Columbus discovered a, the best score made for een holes up to 1853 was ninety-four. thousands of ordinary by mechanical invention and im- at record. v-fhive ever golfers, ment, can beat tl holes in seventy experts right nd on rare instances have scored in A century 7 Tui score, oot eighteen ago, 110 was a that the expert a er as the star of 1850 and better than st of 1800. There heen some.improvement, of course, in itural ability of plavers, but the real ve has come in the mechanical end, h has been mainly along three lines: vements in the clubs and balls, in the e, and mechanical contrivances that idicate todav is as figures seem to i1 re golfer of That is a fallacy. train begi practice reg Hundreds herds invente they knocked 1 } ground with verting them would serve developed i strokes could be from a ( tance away. Later, balls we cause the and then covers Surtace herds’ came Iron 5 clubs wer This was Wilham ot Club made the tourna

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HANICS _ — — — R 1, .\

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POPULAR ME¢ holes in beating ecord of tv-1our;r had stood xtv- five s the SCOTeS lower : The invention, about 1901, by an American, of a machine to lf balls from rubber string finally ced the extremely hard, vet resilient in use. value of these mechanical improve is shown by George Sargent’s score for seventy-two holes when he won tional open championship in 1909 “Chick” Evans, in 1916, won the pionship with a score of 286, a record Il stands. Seventy-two hole matches not played seventy-five years ago, but ores for eighteen holes at that time at the rate of 376 for seventy-two or nearly strokes poorer than mark. The next advance came in lf course itself. Today it is scientific iid out by engineers with all the n surveying instruments. Even the 1S Ol a spe ial Kind, > eloped HANICS . 7 ] 4 ~ » caretul experim ater reset! are built to supply moisture so that | he proper soft vater, special Swinging Practic

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POPULAR MECHANICS DIRIGIBLES TO BE ANCHORED TO SHIPS’ MAS’7 WASHER CLAMPS ON ANY TUB AND WORKS BY HAND WEATHER SUPERSTITIONS JISPROVED BY SCIENCE ve WerT agree te + cent of their receip

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POPULAR MECHANICS NG FOR BIRDS WITH POLE STRETCHING TESTS F O SUPPLY ZOO AVIARIES IMPROVE AUTO ] t OR RUBBER TIRES llection of live birds garden with speci- nts from tl ith the aid the noose at once, cle, and to get it into the ts fluttering and cries MOLDER OF PHONOGRAPH DISKS x mn DUPLICATES MASTER RECORD i Fs e than 150,000,000 talking-machine are manufactured each year in the States to supply the demands of ; + af Sl al Measuring Strength and Stretch of Ler lovers throughout the country. he Bubter in Government I lly designed duplicating apparatus een devised to prepare thousands of ts from master records made di- exhibition te > com) CAN THE SKIN SEE, IS QUERY ry ae oF Taking a Comr Dupli from the sing e the cos markets

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POPULAR MECHANICS BLEACHERS FOLD UP IN WAGONS LIKE JACKKNIFE 1 and the higher ones on the other, the huge truck in about the centet section where it gives the Circus seats that fold up as compactly as a jackknife within the wagons used to transport them have been invented to save time. and money in handling the 1 +. 9° ’ +1 1 equipment of the “big top. With these STane labor hers, four men are able to place the seats of the average traveling circus in about twenty minutes. All that is required is to haul the wagons where they are wanted and unfold the When the circus to move, the tiers are pushed back into the wagons and in a few moments are ready to be loaded on the trains. The lower rows added rigidity and eliminates ust of seats are placed on one side of the wagon many props as with the old-style blea seats. has Unloading the Bleachers Takes Crew but a Few Moments and Wagon Ren as Additional Support; Upper Pictures Show Section Extended and Pa ART OF SOAP MAKING TRACED TO THE ANCIENT GAULS Made from goat's tallow and beechwood ashes, the earliest forms of soap were used by the ancient inhabitants of Germany to give a reddish color to the hair, according to the records of the historian, Pliny the Although mixed into hard and of it ina good state of preservation. N ern Spain and Marseilles later becat chief centers of the industry and prod large amounts of the Castile variety olive oil and lye. Earlier accounts « existence of soap among Asiatic pe are helieved to refer to some kinds ot tures which were devoted to purposes elder tirely apart from those of dyes or cleat liquid material, it was not known as a_ substances. cleansing substance, but was em- ploved in the treatment of skin troubles. The Gauls, it is said, introduced it into the other parts of the world. Today the yearly production in this country is estimated to be 2,500,000,000 pounds. Not until about the second century of the Christian era was the product used as a cleansing article, it is claimed, and an ancient factory for man- ufacturing the material unearthed in the ruins of Pompeii still contained a quantity oiten TIDE HELPS TO MOVE BRIDG! Resting on five pontoons, a 300-ton way bridge that spanned the waterwa tween Oakland and Alameda, ¢ lifted from its position with the help rising tide and by pumping the water the floats upon which it rested. Tt were operated over the span up to se hours before it was moved. 154 alll., ++

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POPULAR S1X-MILES-A-MINUTE STREAM HARNESSED BY TURBINES is considered an important engi- triumph has been accomplished in ; Alps in harnessing with specially icted turbines, a stream of water it the rate of 540 feet a second or in six miles a minute. The column has the strength and rigidity of var and such force that each of the 10-horsepower units in the plant n with a stream only one and three ches in diameter. To withstand > pressure, special apparatus had he water is taken from the and flows through three with a fall of approxi- reach the turbines. ’ Lh ,ONING BOARD IS ADJUSTABLE, SAVING SPACE AND LABOR | ible i l [ ally s] ape indow sill OT any other edge, an board h a Iew : | seconds to ironing as The support can be ! eights and is locked securely i eans ofa spring-hinged strap ane been pa 7 changed to t 1d he ironing board is fiftv-seven ¢ and fourteen inches wide and le of bay wood. It has two holders, vith asbestos cloth to prevent scorcning ing when the irons Or are MUD e and Folded U; Braced mm, there 1s es basket. yoard folds up lik amp three years, only been killed in ngland rhe years ‘e without a single fatal nd in 1923, onl involved loss of | 1 ave i1e f¢ yrced to get a single perfect picture, as eac] ot the anatomy must be exactly portrays MECHANICS PAINTINGS OF PESTS TO HELP WAR AGAINST DISEASE Greatly enlarged pictures of insects that serve as germ Carriers are painted bv Prot. L. H. Wilder to aid the campaign against — Painting a ‘Portrait’’ of the Fly that arry Infantile Paralysis ike + ot the making a portrait, common stable fly, he has to use as many as fiity of the pe part “BOOTS” FOR AUTOS GIVE GRIP TO SLIPPING WHEELS To provide a grip for automobile wl iud holes or on 1ce, it cover only part of the tire ar lanutac- Slippit +h ,

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S46 POPULAR MECHANICS ARROW IN CARD-TABLE “CLOCK” Thus, when the score has been writt: POINTS TO NEXT DEALER the pencil placed back in its socket clock has been set in the correct To avoid disputes regarding whose deal at the beginning of the game, the comes next in four-handed card games, an question is solved by the arrow whi arrow pointer “clock” has been made. The swung to point toward the next d: indicator is pushed automatically one- rer fourth of the way around the dial when- a ever the pencil used to keep thé score is OLD-FASHIONED SEAMANSHIP inserted in the round holder at the side. SAVES CRIPPLED STEAMER Old-fashioned seamanship is stil practiced, although modern sailors more about machinery than about and rigging. When engines break sails often come to the rescue. Su instance took place when the Federal “Norfolk,” was disabled in the India on a vovage from Port Natal to A Captain Corner ordered the fires « called all hands on deck and set the work with needles fashioning sail awnings, tarpaulins, and spare bits « vas found on board. By using car: ricks, he erected bowsprit and yar finally bent on two headsails, four ils and five trysails. Under this f vised rig and by dint of persiste: Card ‘‘Clock” in Use; Posi- ~~ é skill, the captain brought his tion of Pencil Holder Shows Ccralit if Dial Is Misplaced oo Fremantle, 6,000 miles away. LOCOMOTIVES GAINING STEADILY IN POWER With the great increase in weight of weight as the engines have increa locomotives in the United States, the ques- size, but this is due largely, builde: tion has been raised as to what will be the to improved mechanism, auxiliary limit in size, speed and weight. Impor- units and to improvements in design. tant factors considered are size and over- gineers are now seeking to increase t! head clearance. With the gauge of the’ ciency of the engine, not by adding standard track fixed at four feet eight and size, but by changes in the power one-half inches, and with tunnels, via- Regarding speed, it is pointed out ducts and buildings constructed on a scale there has been no attempt for the la to fit the average locomotive of today, years to maintain generally faster s there are immediate limits preventing ules and, in some instances, pa Contrasting a Modern Passenger Locomotive with One Built in 1861 to Show How Engines Have “G The Larger Is Equal to About Five of the Smaller much greater height or width in engines. trains have been reduced in running For many vears, there has been a steady for the sake of greater safety and be: increase in horsepower per pound of of excessive costs.

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POPULAR MECHANICS Youthful Students Are’ Taught Processes of Woodworking by Highly Trained Instructor Trades School that Prepares Its Pupils for Profitable Careers of Labor Training Recruits for Ranks of Labor Skilled Craftsmen and Sound Citizens Result from Vocational Instruction of Students Preparing for Careers in Industry [: INING the best features of old- e apprenticeship systems with the xls of vocational edu thusiasm which 1 flected in the perte tion oft some ol roducts of theit fn al Ings as Ca&r- cabinetmak ttern work ling and forg- a — How Scholar-Apprentices i mechanics, Tra

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848 POPULAR MECHANICS tent instructors, them- for a mechanica selves schooled in aca- finds that he demic as wellas practical mitted to learn a methods of blue print crafts, are per- | chanix mitted to teach, signi: thus insuring construct the pupil the * various benefits of the . : and the most modern of diffe and scientific chem i practices. Un- brought like apprentice- « tact wit! ships where , The y only the mere baker se mechanical “ss | fore hi: training is ac- S . labor corded fora 2 which {f trade, without part o proper educa- \ Sher , — schoolro tion of mind to direct ; i gredients prepare the efforts of the ' widely differing worker, trades schools and other food m include the molding of he works with good character a nd a ——- Se See ft hie Se laying students sound knowledge of the rience in Wood Turning the values of c citizenship in the edu- binding element cation of the craftsmen. This insures to - as mixtures of cements and sai the industry a workman versed in not only analyzed for their information. the mechanical performances of his trade, end they enter upon their life’s but trained in proper conduct in associ- full knowledge of the origin and ation with others of his kind. of the calling. While much has already been done in Everything possible is done furthering the development of the indus- schools to insure the greatest am: trial training institutions, skill and energy interest from the scholar. While t! of the teaching forces are constantly add- _ being taught the work of the hand, ing greater advantages demanded by the _ erable time is given to study of other pace set by industry. The pupil studying jects such as mathematics, histor; iil Where Recruits for the Industrial Army Receive First Hand Knowledge of Sheet Metal Working; Des Are Drawn on Blackboards before Being Worked Up into Finished Articles

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POPULAR MECHANICS — —_ - — = Bakers Are Called Upon to Perform Actual Tasks of Mixing and Preparing Dough for Bread and Pastries in Classroom Bake Shops of Vocational Schools graphy, recreation, and hygiene. hese subjects are practical in their tion to the things met after gradu- hey are taught so that they fit in vork in the shops. rn methods of operation coupled re or less cultural training are de- » fit the youth for rapid advance- hen he enters upon the practice of le. In connection with these the es of good citizenship are empha- a manner with the general education of the pupil and in all cases only the most up-to-date examples of modern industry and cor merce are permitted to form the patter: for the molding of the student-apprentic« into a valuable recruit tothe ranks of labor Most of the courses run over a period of four years, but many may be completed it two and are so organized that the graduat will be sufficiently equipped to take up hi or her calling at a point almost equal to tl rating ot a vet sure the of sound ter during e Where schools partments vocational 1 wir ~ sew ing, c ision are irded the lents. As he other istrial stud- he practical + t } eran. To tres over tures in course ot ert tion, where fi hand infor t i on Can gleaned Pupils in Metal Casting Pour- ing Mold in Trades School Foundry

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Pa! Al ) POPULAR FINDING OF WATER IN DESERT MADE EASY BY SIGNS Welcome signposts, directing the trav- eler to the nearest watering place, are be- ing erected on the barren wastes of west Desert Signpost Erected by United States Geological Survey for Aid of Travelers 7 | ern aeserts, by the United States geologi- cal survey, as aid to automobile tourists and others venturing through this roadless territory. The posts are galvanized iron, about twelve feet long, and are anchored to two red-wood blocks set deep in the ground. Metal sheets with enameled let- ters and direction’ arrows are bolted to MECHANICS them. The survey has mapped and already large areas of the 500,000 miles of desert country and, as t! progresses, the water-famine peril ened alike to motorists and to tho still travel with horses. ELECTRIC EEL’S POWER PLANT IS STUDIED BY SCIENTISTS Attendants at the New York z ing been stunned by current from t! tric eel, an investigation has been of the creature’s power plant. P: attempts at measuring the current failed because the apparatus used sufficiently sensitive to register th: and intense shocks delivered. The said to be powerful enough to stun and are described by keepers who them as “sledge-hammer” blo caused black and blue marks on t! A German professor, according Ditmars, curator, has obtained dazzling intensity by connecting rent to bulbs, but the flash was o instant, defying attempts to measure NOISY VALVES ARE SILENC! BY THIN METAL DISKS Smaller than a thin dime, an aut valve adjuster and silencer consists a small disk of metal that fits over th rods and is held in place by flang: tool or special skill is required for stallation. Less noise and better are some of the advantages claimed f device which also eliminates the n« adjusting nuts on the rods. Resembling a Large Athletic Bowl, “El Toreo,”’ t or Bull-Fight Ring, Is One of Architectural Achievements, Covering an Area of 200,000 Square Feet - Mexico City’s Mode

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POPULAR MECHANICS 851 VOICES RECORDED BY ELECTRIC STENOGRAPHER bining the telephone, radio, and the me, and intended to eliminate nd trial stenographers and short- reporters, a device has been devel- Prof. L. E. Watkins, of the Uni- California, to such a degree that use in the classes in public and dramatics in that university. he idea back of the “mechanical her” is an outgrowth of a desire an absolute and permanent check grammar, sentence nd vowel and consonant pro- More than a year has been de the instrument, iade up of parts of other sound g and preserving apparatus now use. It [ rst, which stands on a table or here within twenty feet of the peakers ; and the second, ycated anywhere within telephon- nce from the first. The transmit- ratus consists simply of a tele- thpiece or microphone. In lebates, or at conferences, several truments be installed in the m, so as to obtain with the great- voice of each speaker. receiving room, the wires are con- inflection, he making of consists Ot two sec- which ne may ness the to a specially constructed amplifier, ed with three auxiliary adjustments le the operator to olume. ss to a loud speaker. This is co1 means of a flexible tube to the ter ofan ordinary dictaphone. The e speaker or speakers passes into regulate the Out of the amplifier, the the telephone transmitter, through the am- : 1 plifier and the loud speaker, and is deli ered, exactly as spoken, into the recording Combination Radio, Telephone and Dictaphone Designed to Do Work of Court Stenographer instrument, the dictaphone. The re may be taken out and run slowly thr phonograph for sealed and filed, or they may be run for the benefit of the student-speaker, to e able him to correct [ s] grammar,or subject matter. Theadvanta over stenographic records is tl copying; they may his errors of spee preserved for speake r said, man element of ert @ Pulp left after ext: is used as fuel in Sy Arena 450 Feet in Diameter and Seating Stands of Concrete and Steel, Mexi Outdoor Amusement Structure Affords Room for 20,000 Spectators

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POPULAR MECHANICS One of Aerial Limousines which Will Carry Amundsen Party to Polar Lands in Search of Short Routes for Air Highways between World’s Cities Cabin of Airplane, which Will House Amundsen Crew on Polar Trip Airmen to Cross Frozen Top-o’-the-World N search of air highways across the spreading about the north pole, intrepid aviators and explorers will attempt to “pioneer” an unknown ice- bound area of 1,000,000 square miles. Be- lief that not only great expanses of un- charted land, but that wide currents of warm air in the upper regions exist within the boundaries of this “no man’s land,” serves to promise the scientific success of the ventures. Besides affording shorter routes for air travel to Europe and Japan, by flying over the polar territory, it is thought that more accurate forecasts of weather can be made through the informa- tion it is hoped the expeditions will gather. Both dirigibles and airplanes are to be em- ployed to transport the explorers in their searches. In England, an expedition com- frozen wastes posed of one giant airship is proposed to seek out the secrets of aerial possibilities over the Arctic. For the purpose, the Explorer Amundsen, Right, and Lie Ready for Flight dirigible airship “R-36,” a massive has been designated as the proper o1 the trip. Its powerful engines and construction are believed equal to a any weather conditions that might b: while its comfortable accommodatio! the crew can relieve them of many hardships experienced in the extreme of the frozen north. Under direction and command of R Amundsen, discoverer of the sout! the expedition of two airplanes, planne invade the north, will explore hithert: mapped territory and collect data fo: use of future aviators and aerial travel. Each plane has a cruising radius of | miles and it is thought that by establis a point of supply in the neighborho: the pole, preparations can quickly be 1 for a final dash across the barren wast the top of the earth. comme! se

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POPULAR MECHANICS t g Upward at the Air Liner, Showing of the Powerful - Driven Propellers, the Luxurious Cabin Nesting Close be- h the Big Gas Bag Commander F. M. Boothby, of the British Dirigible “R-36," Who ill Direct the Venture over Wastes of Frozen North Tied Up to Its Aerial A | — a Huge Nose of the British Diente. 1H i: Snug Sleeping Quarters of ‘ 3€ wil Hugs the Steel Mooring Mast + fy @ = = — > Workmen Inspect Machinery and } p for the ight, an art Skin of the Massive Airship — = = of the Dining Room Ready ay for Breakfast

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POPULAR MOVABLE DAM BLOCKS CANAL WITH METAL PLATES Reser able et ibling a large drawbridge, the mov- vergency dam at Gatun, on the Pan- 1 Canal, can be swung across the chan- n Panama Canal that Bars Off Channel in Cases of Emergencies er needed. Supported by heavy isswork, the mechanism with is equipped may be made to lower metal plates into the bed of the canal a barrier to cut off a section of the stream. Despite its great weight, the huge struc- ture is easily controlled from a tower, and when idle rests on sturdy foundations to relieve the strain on the girders. The ap- paratus, it is said, enables repairs and in- spections to be accomplished in much less time than would be required where the or- dinary method of damming off the water as is emp! RUBBER DATE-STAMP WHEELS ARE EASILY ADJUSTED rer impressions and greater ease in ion are claimed for a rubber stamp sted Rubber Stamp with Revolving Date Dies Molded from One Piece MECHANICS which has dates and names of the on one-piece revolving dies. The freely on a brass pin, are easily lox lined by a hinged bar and are incl heavy metal yoke. to assemble the date with this stamp and all letters and numby shown in exact alinement on the p Less time is KEYHOLE EASILY SEEN IN DARK WITH LUMINOUS CASING Finding a keyhole in the dark eas\ by a patented celluloid casing t around the inside of the lock and with phosphorus or luminous pair also is made in the form of a cap over electric push buttons. HOSE NOZZLE IS HELD STEAD\ BY PRONGED HOLDER As aid in garden, a single-piece, heavy wire support tor the has vented. It has a double ring clamp and tw prong pushed eround, s an sprinkling the y ~ hose o sharp S to be into tl that l not yack- the in 1e = oO the holder wil turn or fall | ward when hose is inserted the clamp. 1 support may painted or ‘] | enamni- eled a bright color to make it more attractive. e [It is espe designed for use with full-stream ANCIENT CHURCHES OF ENGLAN| MAY BE SHIPPED TO JU. S. Americans, wit] may in churches ars ago 1 1 ¢ Lond li. Oe ral O! aving thei 0 attend in tl 5 | : | these old stru ned and it is no dismantled at 1 1 ‘ cities througnou out le shores pon lave bee posed that they | Cc erected 11 arious Inclu were 1 Val world. ded in the number are s« desi Sir Chri » be connected some phase of national or interna history. The plan to remove some ott to the United States is by Edward Page er which 7 signed by Wren, and all are said t being furt! Gaston, lecturet journalist, who is seeking the co-opet hurch organizations in this Ot Ci count

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POPULAR MECHANICS 855 ACCIDENT-PROOF TRAFFIC POST TILTS WHEN HIT event automobile accidents caused ning into stationary traffic signs in eets, an inventor has patented a ost anchored to steel springs which allow it to tilt over when struck and pull it back into an erect position when re- leased. Parts are in- closed in a steel drum below the surface of the pavement. The post rests on a metal ball which permits ample play in every di- rection. Non-illuminated danger posts and electric “Stop” and “Go” traffic regulators have been fitted with the flexible anchor and have been successful. Styles of Tilting Traffic Sign Post Resting on Ball Support and One in Position in Street; Dotted Lines Indicate How It Would Swing if Struck CAMERA SEES TRACE OF CRIME AND CONVICTS OFFENDER enlarging an ordinary photograph riminal’s finger print many times, a criminologist discovered evidence offender's deed lodged in the pores skin. Repeated washings had failed move the traces, it is said, and the aid given the police resulted in a convic- Usually prints of the finger tips are Finger Print of Criminal which Revealed lraces of Crime Lodged in Pores of Skin used to identify criminals with their mis- deeds, and as a means of record the pic- tures are kept on file. The enlargement not only showed the pattern of curved lines of the cuticle, but increased the size of the pores, disclosing the telltale evidence. DUCKS AND LOONS USE WINGS TO SWIM UNDER WATER Do ducks use their wings while swim ming under water? The question is dis- cussed frequently among sportsmen and nature students, and opinions sometimes differ. Testimony of reliable authorities, however, supports the belief that various species of ducks and grebes, loons and other diving birds do use their wings when swimming beneath the surface for food or in trying to escape capture. A ruddy duck was observed in Lake Michigan not long ago, feeding in fifteen or twenty feet of clear water. As it got well started on its downward plunge, the wings, about two-thirds extended, were used in quick, short strokes at the rate of about one a second to assist in propelling it and in ris- ing to the top as well.

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POPULAR MECHANICS How Rudderlike Cont Planes at Bow of marine Boat Goverr and Down Movem« Conning and Deck marine Ready for Dip under Sea; Showing Vessel’s Narrow Beam that Reduces Resist- ance to Water as It Slips Silently through the Depths mersible as t Goes ‘“‘Awash’”’ ward Plunge Ocean’s Hidde ways Beneatt! Waves; Steering I rected from the I: Control Towe Stowing Life Boats Away below Ma Deck of Undersea Vessel, from ™ They Can Be Raised and Lowered | Few Minutes Should Accidents Ox while Craft Is Riding the Surta x

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reru are WEAR ON GOLD COINS RESULTS IN LOSS OF MILLIONS gold? It has many els of disappearance, according to rts. Figures show that more than half annual output is employed in the fine ind jewelry trade. Thousands of ls also are used by dentists, one esti- being that over a ton is needed every ir the filling of teeth. Then money this loss being rn away in handling, annually. Bank of it becomes of at $1.250.000 nd sovereigns are often tested and to have lost much of the original Of the immense quantities of the 1s metal that have been buried away e earth, it is believed comparatively has ever been recovered. The priests said to have buried approxi- $10,000,000 worth of treasure to ve it from the clutches of their per- tors. None of this has been found. tombs of the old kings of Egypt were ure houses, immense quantities of gold jewels being interred with them. It been estimated by historians that Alex- the Great became the master of oards of gold, all of which, so far as has vanished, Giant Floating Crane Raising a Crippled S$ bmarine SEA’S HIDDEN HIGHWAYS IMPERIL SUBMARINES Because of many dangers surrounding the lives of crews aboard submarine extra precautions are taken to school the sailors against accidents. Many crave dis- asters have been averted through training the men in operation of the craft during emergencies when mishaps to machinery often result in the failure of the vessel to rise after submerging. Careful watch is kept on the sibles by surface craft and constant check on their posit maneuvering insures instant aid should signs of their distress be noted. Although tanks of air are provided crews of submet sibles in ci e of accident beneath the wave hours of cada isonment and consumption of oxygen from the atmosphere inside the craft, disaster. When occur in shallow waters, rescue can be accomplished by pow erful floating cranes which raise the boat from its posi tion and support it securely on the surface. poats, submer ions when often result in haps COW BONES SHIPPED TO CHINA Three carloads of shinbones from cows slaughtered at a Chicago packs lant have shipped from Galves China where they will be used in the uta of Maj Jang sets. been fure

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plan it) ( c J ) POPULAR MECHANICS RIVER IS HARNESSED IN TWENTY-FIVE MONTHS

\ ww. wav “! > > > ” -" ave aware — —_— «<—awae * ar a ave .

ae " Rotating Part of an Electric Generator for the Mitchell Dam Power Plant in Alabama which Began Oper Twenty-Five Months after Its Construction Was Started Designed as part of a hy t which is to harness the Alabama, the Mitchell ipleted, consists of five units with a ombined production of 120,000 horse- Che turbines which drive the big enerators the vertical-shaft nd will operate at 100 rey dam, recently oO! ower,r. are of type per are twentv-five inches eter and eighty feet lot [ olutions The shafts (One ot POCKET “SAFE” FOR KEY RING HOLDS VALUED PAPERS “arrying hile identincati o. = license o1 attractive cvii1

cket Case for Papers that Takes Up No More Space than a Fair-Sized Key has been devised. t, and has a ring which a chain may be and end inserted so It is fire mm one 7 droelectric Coosa river the remarkable features about the 11 tion is the short time required in it struction, twenty-five months being sumed from the date the work start the beginning of the plant’s operatio dam is 1,264 feet long and almost seve five feet wide at its base. The stru was planned to take care of a flow oi 000 cubic feet flood st a second, so that even ages would not impair its FUEL FROM DUST AND WAS AT TWO DOLLARS A TON Great savings in the cost of heati: power are claimed for a fuel manufact in Japan from chopped stray The mixture and moistened with water to the « sistency of thick paste. This is then ro out, cut and formed into blocks or ba various sizes, which after drving are r to be burned. This fuel can be sold at dollars a ton, it is said. charcoal dust, chaff

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COMMENT AND REVIEW V ) HEN an idea has progressed to the point where its owner is ready to apply ’ for a patent, he naturally becomes very anxious to have his application passed upon by the patent office, and is impatient and even suspicious at long - delays. He wants his patent right away or to know that it is Delay unpaténtable. Following the war it was usually impossible to get final action on an application for a patent under a year and in a half. The patent attorneys have often been held responsible Patents by inventors for this delay when they were doing everything ; humanly possible to secu-e action and results. One funda- mental rule in the patent office—and a just one—is that appli- ons shall be examined and started on their course in the order in which -y are received. The war robbed the patent office of a large number of its trained men, few f whom returned after it was over, as they easily found other occupations much re remunerative. This threw a heavy load on those who were left and the plications came in so much faster than the decisions could be made that six mnths ago the waiting applications amounted to 75,000 cases. Recently an appropriation was made to enable the office to put on eighty- five additional men, forty-five of whom were examiners and this, with a reorgani- zation in the manner of handling applications, and the introduction by the pres- ent commissioner of modern methods generally, has already resulted in a gain of 1,000 cases per month so that at the present time there are less than 64,000 :pplications awaiting action. The new men will naturally become more efficient and expert as they gain experience in this special work, but even under most fa- vorable conditions, with the present office force, it will require at least five years to reach the point where the desks are cleared and an application can secure attention promptly on receipt. At present the very best that can be done in me classes of inventions is to date and number an application and file it away or nine months. This catching-up process scheduled to be worked out in five years depends, moreover, on no increase in the number of patents applied for. So, Mr. Inventor, do not blame the commissioner of patents, nor his able assistants, nor your own patent attorney; they are all working like beavers to lig out and get your case through at the earliest possible moment. Nor should the present delayed action discourage inventors to let up on their activities. Ina way, it is to the inventor’s advantage, as his patent when finally issued bears date, not of application, but date of issue. In the meantime he can go ahead, manufacture and sell with “Patent Applied For” on each article, providing, of course, his patent attorney, who works promptly after making the “search” for infringements, assures him he has something not already covered by a patent. In that event, of course, he would not get the right to manufacture anyway, on or late, although an experienced patent attorney can often tell the inventor how to change or improve his invention so as to avoid prior patents. The public never dreams of the number of patents made possible by the help of the patent attorney handling an application. I, myself, have known of scores of such -ases, and there are thousands. In order to shorten the five years to prompt action, the commissioner of patents has requested congress to provide for 100 additional examiners. This nas been approved by the house of representatives and it is expected to pass the senate, but here another difficulty present itself. At the present time the patent fice is much overcrowded and this hampers the work of the officials. Even the hallways have been converted into rooms in order to relieve the situation, and when the additional examiners are provided, conditions will be worse. To ac- complish the best results more space is required, and this can easily be arranged with the permission of congress. Not only is more space required by the per- e3 859

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sonnel of the patent office, but more storage space is needed, in which to preserve the records which have increased into the millions and which are constantly increasing at a rapid rate. If you are interested in getting prompt and efficient service on the part of the patent office, get after your senators and congressmen for an appropriation to provide for enlarging the quarters of the patent office. The progress and prosperity of our country owes such a vast debt to its inventors, that the comparatively small amount required to provide for addi- tional patent office space is a very modest request for an investment sure to return a thousand-fold and in which the public is the chief gainer. The present quarters occupied by the patent office dre, for the most part, as much out of date as an old East Side tenement in New York compared to a modern apartment building. Not only out of date but utterly inadequate, and actually a disgrace in a nation so largely indebted to inventors; a nation with more inventive ideas than all the rest of the world put together. It is to be hoped that congress will promptly afford this desperately needed relief. * * * *x * AN English mining engineer now visiting the United States expressed to me great surprise at the frequency and mortality of coal mine explosions in this country. He ascribes these disasters chiefly to carelessness on the part of the miners themselves in striking matches to light cigarettes o1 Explosions pipes. In England every man is carefully searched before be- ing allowed to enter the mine, and if so much as a single match in is found about his clothes he is subject to a possible short term Cua) Titties in jail. So rigidly is this examination enforced that explosions are confined chiefly to the ignition of gas from powder blasts, and even these are comparatively few. The average American is apt to be careless and to take chances even where his life may be the penalty; he resents anything which savors of rigid personal inspection. Aside from al! question of moral responsibility for the lives of employes, it would seem that the risk of great financial loss alone should insure the same care which has made English coal mines apparently so much safer than ours.

AYTO accidents, which would otherwise be trivial, are increasing all the time caused by broken windshields. In a collision the passenger seated next to the driver, often both, are hurled through the heavy plate glass, causing wounds from which the victim bleeds to death, or dies, or is perma- The nently crippled from infection. , aoe Riding on a train through the mountains of West Virginia Windshield | recently a man was helped aboard whose head was covered with bandages. He was on his way to a noted specialist in a big city hospital. I asked him, “Did your car turn turtle?” He replied, “No. I was climbing a steep mountain road at a speed not to exceed 15 miles an hour, when a chicken flew directly across the road over my car. It struck the windshield with the result you see. I still hope t save one of my eyes.” Similar instances of windshields broken by flying birds or fowls are becoming so numerous they no longer cause much surprise. However, inventors have already come to the relief of this danger, for it can be easily prevented by the use of a new plain clear glass, containing no wir: screen, which to all appearances is ordinary plate glass, only a trifle thicke: Even this difference escapes notice except on close examination. It will not only stop birds and fowl, but likewise a brick thrown at short range and even : bullet fired from a revolver. Under the impact of brick or bullet the glass o: the side from which the missile came shows a slight fracture in its surface, but neither can find its way through the glass; and a blow from a hammer i equally harmless. One more tribute to the ingenuity of the inventor, who seldom fails fo long to meet new conditions, no matter how difficult.

Danger

- —" <a

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= ——————— = r OF all the works of man, radio is the most cosmopolitan and far-reaching. 4 ’ The lights of his greatest projectors fade out and are unseen at 200 miles. The thunders of his mightiest cannon are unheard at seventy-five miles. The human voice, with its utmost physical effort, only reaches one Radio mile. But radio, still in its infancy, already takes the word spoken almost in a whisper and hurls it thousands of miles, the not in one direction only but in all directions. Inexhanetible Man has never climbed a mountain so high or plowed the sat record heights of space in his airplane beyond the point where its voice would not reach. It follows him into the chasms f the earth hundreds of feet below sea level, and has found its way into the hidden recesses of its deepest mines several thousand feet below its surface. You cannot hide from it nor shut the door against its entrance, for it penetrates walls and prisons and there, when wanted, declares its message. It almost rivals that still, small voice of conscience in its universal presence, with only this difference: It does not impose itself on your consciousness. You must bid it speak or it remains silent. But you cannot evade its presence; it is there, al- though no one has ever seen it and you refuse to listen. Who fan longer doubt that some day—sooner perhaps than we dream—the signals or voice of radio will be heard and answered from other vast worlds which now to us are little more than pin points of diamond light in the limitless space of the firmament. Today millions of people can remember well the time when the present commonplace service of telephone, electric light and airplane was no less unbelievable and apparently much less likely. In all the ages of civilization no other scientific mechanism has ever plunged so quickly from its first crude efforts to its present useful efficiency on so huge a scale of adoption and use as radio. Another wonder of the radio is its undiminished supply. The most power- ful locomotive can pull only a certain number of cars; the smallest church or the largest auditorium has only a limited capacity. But radio is a magic spring that cannot be exhausted. The effort of the singer or speaker, or the power required of the broadcasting apparatus itself, is not increased by so much as the strength of the tiniest form of life when the solitary listener is increased to a thousand. And when that thousand grows to tens and hundreds of thou- sands, yes even millions, the effort required is exactly the same. They all fill their cups from the same spring at the same instant, but the flow is unchanged how- ever few or many. There are few physical things in this world which are not diminished by use. In time crops exhaust the land; all the fish can be taken from a lake; mines refuse to longer yield their treasures ; oil wells cease to flow; but when once the radio impulse is sent forth from even a single station all the receiving sets in the world cannot use it up or diminish it. There would still be the same supply for as many more at the same instant. a * « * ok LAST year fresh-water game fishes alone were taken by anglers from our rivers and lakes having a market food value of $48,000,000. But each year the supply decreases, and with good roads and automobiles there will soon be more fishers than fish unless something is done. A bill recently in- Saving troduced in congress—and which I hope is passed before these words are read—is known as the Izaak Walton league bill, and the provides for a national refuge for game birds and fish in the Outdoors marsh lands of the upper Mississippi. These bottom lands, | which are unfit for cultivation, are the greatest breeding places in the world for black bass and other fresh-water fish. Each year more and more streams are made so poisonous by pollution that all fish and feathered game desert them. One of the objects of the league is to stop further stream pollution and in time restore streams now ruined. The Izaak Walton league is working to preserve enough of the Great Outdoors— forests, streams and lakes—that coming generations will have more of them to enjoy and use than we have today. H. H. WINDSOR.

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S62 ALUMINUM GOLF CLUB’S HEAD HAS REMOVABLE FACE With a head made of aluminum, a golf club has been patented which, it is claimed, Aluminum-Headed Golf Club, the Fiber Face of Which May Be Changed to Suit the User 2 POPULAR MECHANICS will last a lifetime. The metal is « hollow shell into which is fitte block held in place by four screw the bottom of the base. The fiber | face of the club are exposed. INJURED BIRDS’ LIVES SAVED BY ZOO “SURGEONS” Injured birds that have been str automobiles, stunned as a result of flown against windows or captured | and other natural enemies are fre taken to and aviaries wher: hurts are doctored and they live to | parts of the exhibits. Broken wi: legs are carefully set in splints “patients” are kept in dark cages so the injury will mend quick! cautions are taken to keep the being frightened or becoming while undergoing treatment, and tl tempting feeds are offered them, o their refusal to eat during the first captivity. Fish-eating birds have coaxed to consume freshly caught d: by putting live minnows into their ing fountains. Newly captured adult must also be permitted more exer¢ food than others. ZOOS and ELECTRIC ALARM SOUNDS BEFORE FIRE STARTS Protection against overheated furnaces, burning out of bearings, and spontaneous combustion is secured with the aid of an‘ adjustable electrical instrument designed to sound an alarm bell and locate the dan- ger spot before damage results. It consists of a small case in which a carefully ad- justed loop of wire is inclosed. Should the temperature rise above a certain de- gree, the loop is expanded, forming a con- tact with an adjusting pin and clo electric circuit which registers an al ringing a bell. In case several of t! struments are installed in one p! home, a register board is provided t the number of the one giving the It may be installed in mines, airy ovens, stores and factories, and in practically any place where is fire hazard from overheating. on board On Board Ship, in Mines, Arsenals and Coal Piles, Electric Signal Here Diagrammed with Annunciator Signal Board, Instantly Sounds Alarm of Fire Danger

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POPULAR MECHANICS V fA Mv oa - a ot & Seventeen-Ton Unloaders at a Modern Great Lakes Dock Relieve a Gigantic Ore Carrier of Its Cargo in a Few Hours \lotor Ships Link Inland Seas to Oceans Electrically Driven Freighters of Light Draft to Seek Maritime Highways through Narrow Channels of Great Lakes R \LLING the days when \ e vessels plow ed the fresh-water he Great Lakes, electrically driven than a century ago. Narrow canal eht draft, with collapsible stacks shallow channels that prevent wide to massive “fir-built” that mark a decided contrast to thi vessels that made up the lake fleets and ore boats a easy passage slim hull of the n tor ship. Rougl have no | wpd8;Nn ft +} 4} i it t | on the heavier types, permitti such craft to entet overseas al d vise trade un more tl 1,000, th stur ; | I electric a k e a ; “ — wig aa ~ man i Pp u and short . - through the lecpite -hed S} ite scned- £30 =D + D+ 3D WD «= 155016 dw -e- rhb ee *—_)] ‘ a cae x ns nany Calis ( ss , ~ - » & % 17] ‘a 7 “ " ( o nN: n CZ DA Ray, } . ing mac propelling Po 4 hao * found no ry has heer we erTvV Nas been ' | . aimos every I I by power- > : r) j : Rare Old Type of Lumber Boat, Relic of Romantic ese engines shortens the periods **Pioneering’’ Days on Inland Seas required to transfer

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POPULAR MECHANICS Freight Boats Ice-Bound on the Great Lakes in Mid-Winter Awaiting the ‘“‘Break-Up”’ to Resume Thei less Journeys between Ore Mines and Steel Mills cargoes 9 , reducing waiting time and freeing the freighter to take up its journey in much less time than was necessary under of the fresh-water seas on ships that in from the “outside,” as the wide lanes are known, this waiting mass cables and girders that reach out open their cargoes means short “shore and the powerful arms of giant cranes and The huge piles ot bulky material tentaclelike hoists snatch out the burden close by on the dock, and which tl] from the dark holds, quickly transferring it to storage heaps or into waiting railroad cars that carry it to mill and faetory. To methods of a few years ago. Easing up to | the docks, the hatches are thrown to take aboard in exchange for the they bring, pass into the holds wit! quickness that amazes the seasone salt-water sailors who breast the breezes dog” accustomed to the slow, « machinery and scrambling stevedor mark such movements in salt-wate Loading Ore into a Boat as It Lies in the Slip of a Storage Dock Where Sufficient Chutes Are Provided erve Several Vesse‘s at the Same Time

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POPULAR MECHANICS ae oy Movable Conveyor Crane that Transfers Iron Ore from the Holds of Boats Lying in the Canal to Waiting Railroad Cars for Direct Transportation to Mills number of years many ocean ways practically the whole year around ive been propelled with electric Some of these monsters carry burdens of as some authorities believe such 12,000 tons and are manned by crew VS ol re capable of greater speeds and less than twenty men. Systematic han ce than the ordinary coal fuel dling of freight at the docks, being accom With fleets of these and contem- plished with the aid of modern machinery, enlargements of the _ existing lh: ‘ls and locks in the Great Lakes labor and the wheelbarrow corps. Boats is expected that eighty per cent of | with bulk cargoes of 10,000 tons have been in the world’s commercial service emptied by one crane alone in less than ike use of the inland waters to two hours. The entire battery of unload rectly with centers supplying grain, ing machinery is such that it can be con coal, steel, lumber and similar trolled and operated by one man. s, by extending their sailing range Grain elevators holding millions of is superseded the old process ot hand 1 ports. bushels of wheat can pour their treasures te of severe winters the lakes are directly into the interior of these giganti losed to freight traffic, ore boats hulls at such speed that as many as halta l« ] ber steamers plying their busy dozen can be filled in a day. t of Big Lake Freighters Passing through One of the Many Narrow Channels that Connect the ‘Inland eas” into an Immense Fresh-Water Highway

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Sob GIANT SAXOPHONE IS SO LARGE PLAYER STANDS ON LADDER Weighing 500 pounds and modeled ac- curately after smaller instruments, a huge saxophone was displayed not long ago in Trying to Blow a Few Notes on Saxophone Weighing Five Hundred Pounds ‘alifornia. Securely bracketed to the out- side of the manufacturer's shop, the giant instrument formed an impressive advertis- ing display, and to emphasize its tremen- dous proportions, a young woman who at- tempted to play it was compelled to mount a ladder to reach the mouthpiece. NOVEL DESSERTS ZASILY MADE WITH CAKE-SHELL PAN Many novel des- serts are possible with a_ patented aluminum cake- shell pan. It may be used to bake forms for fresh or canned fruits, gela- tin and custards with their topping of whipped cream or meringue. Made of one-piece, highly finished metal, it may be cleaned easily and cannot burn out with reasonable use. POPULAR MECHANICS HUNDRED MILES AN HOUR BIR FLY DAY WITHOUT STOP Flying at a rate of a hundred m hour, some birds can continue on th: for a day without stopping. The it is said, can travel great distances speed and often stays in the air for day of flight. Many wild ducks and lar fowl attain almost as great speeds migrating, while, among smaller bird swallow has been known to reach miles an hour and to keep up that r for long stretches. The eagle, despit strength and big wings, seldom flies as a mile a minute. The crow, tl seeming to bea slow mover in flight, 1 about twenty-five miles an hour, at carrier pigeon does an average of miles in the same time. The tiny s; can travel at twenty miles an hou: only for very short distances. T! goose does one hundred for hours appearing to slacken its pace duri: entire time it is flying. COMB HIDDEN IN POCKET CAS! IS WORKED BY BUTTON Combining neatne convenience, a collapsible pocket « tached to a metal case that i teeth to protect them from dust a1 has been placed on the market. Ont of a case is a small button switch, when pulled to one side, lifts the c position. A reverse movement cau slide back again into its case. The is manufactured in handy sizes, cor: cleanliness, inclos¢ Collapsible Pocket Comb Folded Up or Ready f at Touch of Lever rounded so they will not tear the clo and the sides of the case are suitab! engraving or other decoration. @ We want all our readers to write freely and often whenever they wis! ditional information on articles publ: in this magazine. Address Bureau o! formation, Popular Mechanics, C|

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POPULAR MECHANICS 867 BOMB CARRIED ON AIRPLANE WEIGHS TWO TONS hing 4,000 pounds and nearly four- et long, a bomb has been com- vy the United States army ordnance It was designed to be carried on a plane and the two together are form one of the most powerful tion units ever devised. Explosive t to blow a crater 150 feet wide in the surface of the earth can be carried in the huge “death shell.” The bomb was exhibited in a New York hotel during a banquet of war department officials and S- engineers who met to discuss industrial pre- paredness as a war preventive. Tackle and Squad of Soldiers Were Required to Slide Heavy Airplane Bomb into New York Hotel Dining Room where It Was Exhibited at Banquet PHOTOGRAPHS TAKEN FROM SKY REVEAL ERRORS IN MAPS ping of changes in coast line, which rdinary conditions would take any- irom six months to a year, is being tely completed in a few weeks the use of the airship in survey- Swamp lands in Florida, forests in i, and other uninhabited areas con- possible for settlement, are being | from the sky; wood mills are using to inventory standing timber, and ls are determining favorable routes aid of bird's-eye photographs. intage of airships over the old urveving methods shown cent air mapping by the Ontario ent brought to light many errors issions in former maps. 1 was METAL SHIELD GUARDS POLICE WHILE DIRECTING TRAFFIC the policemen in Washington, D. C., tected from the weather and the ity of being struck by automobiles etal shield, somewhat like a bottom- rrel, in which they stand. One side t open to permit entrance and exit. large enough to allow freedom of ment and acts as an efficient “snub- st” when cars approach too near. FOLDING STAND HOLDS PLANTS IN ANY POSITION DESIRED Especially suited to decorative displays in stores, windows and in homes, a tele scopic stand has been made that will hold plants in any position desired. The larger and heavier the pot, the more securely it is held at any angle, height or position de Telescopic Plant Stand that Will Hold Pot at Angle, Height or Position Desired Any sired. danger of the plant being upset not in use, it folds into small space. It will not tip and eliminates the When

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POPULAR MECHANICS “lien Women Students at Teachers’ College, Columbia University, Building Workingman’s Home; and, at Right, a Miniature Guide for House Buyers Attractive, but Inexps Home with Double Wa Concrete Blocks Which S« Keep It Cool in Summe Warm in Winter Homes Are Turned into Thermos Bottles Insulating Material Poured between Walls Saves Fuel in Winter and Protects against Heat in Summer Months T° cut fuel costs in the winter months and, at the same time, to add greatly to the comfort of the home during the hot summer, a Chicago inventor has perfected a material to insulate walls, floors, ceilings and roofs and make them fire, vermin and noise-proof. This is done by taking gyp- sum wall plaster and mixing with it some dry chemicals which have the property of forming, when mixed with water, the same gas that yeast forms‘’in bread. In practice, the material, consisting of the chemicals mixed with the gypsum plaster, is brought in paper bags to the building which is to be insulated. To all outward appearancés the material looks just like ordinary plaster. When water is added, however, a great change takes place. The gas generated in the mixture ex- pands the mass just as the yeast expands the dough used for bread. By the time the “mix” is thor- oughly stirred it has increased in bulk five times. As soon as the mixing is complete the mix- ture is poured into place. In thirty minutes it has set hard, producing a mass honeycombed Cross Section of a Puffed Gypsum Block Showing the Large Number of Confined Air Cells with millions of fine air cells, visible t eye. One of the most important point consider in any house is the insulat the ceilings immediately under the Reports made by Armour Institute Technology declare that two inches « puffed gypsum placed above the lat! plaster will save sixty-nine per cent ot t heat loss that would pass through the « nary ceiling. Its use also means the ¢ ination of the intense heat rad through the roof during the summet a home where the ceilings under the att were properly insulated the upstairs 1 would be as cool as those downst When insulati: ceiling ina house, waterp! paper is placed the lath and p! to prevent any sibility of w stains. An ord tub, a couple buckets, a1 paddle are the tools required. mixture is pot into place smoothed out to required thick: It can be applie anyone without | vious experie! In insulating side walls of a bu ing the puffed g sum is cast on

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POPULAR MECHANICS YS Insulating a = = —! | | Ss Roof with Por- [| : ous Gypsum to 1 of Mod- C Keep Upstairs | Home that —— A Cool during Hot vs Some of » = — Months; and, F Artistic | Below, How bilities to : Material Is oo Obtained 3 Poured Concrete A \ Slabs of Gypsum Used to Insulate Walls Being Cut and Placed between Studs after Material Has Been Poured h Job and Has Par- tially Hardened Another Example of the Artistic Possibilities of Concrete in th Construction of Homes for Which It Is Constantly Growing in Pop- ularity Due to Its Low Cost

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POPULAR moor in large slabs n top of sheathing paper. In thirty minutes it has set hard enough to cut up with a putty knife into sizes to fill between the studs. In a test to determine fuel saving, an in- sulated house used only three tons of coal during the winter, while a similar house without any protection required seven. Tests also were made with a number of storage tanks used in heating water for household use both with gas and coal. In every instance where the insulation was applied, the cost of the fuel was reported to have been cut in half. installing sufficient , side walls and ceilings, } insulation in it is said to possible to make a os bottle out of anv building. een proved JAPAN EXPRESSES ITS THANKS FOR EARTHQUAKE HELP Containing the names of approximately 50,000 Japanese citizens, a letter of thanks for the help given by the United States 300k Containing Fifty Thousand Names of Japanese Who Express Thanks for Earthquake Relief e earthquake been received by te department in Washington. The res have attracted much attention. TREE LEAVES AS BAIT FOR FISH STUNS ITS VICTIMS In Madagascar, where primitive methods procuring food are still practiced by the ves, fishermen gather their catch by first paralyzing their prey with a bait made from leaves of a peculiar tree. These are laid out to wither for a few days and are then crushed and chopped ito a sticky mass. Thrown upon the water, it floats, attracting the fish which appear stunned when they seize it and are powerless to escape the nets used to trap them. MECHANICS POLICE IN BULLET-PROOF Cars PRACTICE SHOOTING TARGET To perfect their marksmanship, t] adelphia patrolmen assigned to d fleet of fast, bullet-proof Patrolman Shooting at Target from Bullet-P Used to Chase Criminals in Philadelphi have been practicing shooting at while the are in motion. chines have been assigned to pat as a precaution against criminals employ high-powered machines. cars KEY TO CHARACTER IN PENCILS ACCORDING TO EXPERT Can character be read from the t pencil used? According to one exy answer Men are usually attr by the lead and women by the o coloring, he says. Persons of strong acter know just what they want not be satisfied with anything else ir ing, while weak characters adju selves to the first pencil offered tl servative people, who are used ti pencils, demand what they have had. Cautious folk wish to try out a extensively before purchasing it. pencils are said to be much in dem is ves. CUFF LINKS LOCKED BY SPRING CANNOT PULL APART Cuff buttons that can be unfasten when a spring release in the lower pressed have been patented. consistS Of two sections. The top half has a bar pro- jection which is inserted into a spring catch in the lower part. When this snaps shut, it can be released only by pressing a knob on the outside. The links ar tractively finished, rounded so they not tear fabrics, and are quickly inse

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POPULAR MECHANICS S71 CANARIES BY THE SHIPLOAD NEEDED TO MEET DEMAND the Cunard liner “Andania” New York on one of its trips d the chatter of 2,000 cockatoos ock hands who descended to un- teamer. Each songster had been a separate wicker cage and they ed high in the steamer’s store- Che birds consumed 4,000 pounds on the voyage and required the our attendants. Most of the ca- din the United States are bred in During the war, domestic upplied many markets, but im- ns are now regaining their normal Dealers assert that the pet ca- ncreasingly popular and sales are each year. RUBBER SUIT KEEPS MOTORIST DRY AND COMFORTABLE he protection of motorists and case of storm, a waterproof, over- as been manufactured that can be it with Hood Protector and Diagrams of Cape Ventilator and Collar on or off in a few seconds, has no ome buttons, allows freedom in ent, and covers the entire figure. It posed of two plys of strong fabric which is a layer of rubber. Pat- steners at the front, wrists and are quickly adjusted.- The collar drawn over the head for additional tion and, when folded up, the suit es but little space. The garment is | ventilated that it can be worn in eather and yet provides warmth in and cold. ROLL MAKER WIRED TO PIANO RECORDS NOTES AND WORDS Connected directly to the piano keys, an electric instrument that perforates a paper record of the selection as it is played, has Inventor Playing Directly upon the Roll through the Record Punch Connected with Piano been patented. It consists of a series of plungers actuated by electro-magnets. As various keys on the piano are depressed, corresponding circuits cause the plungers to punch holes in the paper beneath them. Words of the song can also be printed on the roll as it passes through the recording apparatus. The inventor says that it gives a faithful reproduction of the exact phras- ing and expression of the artist’s playing and that rolls can be made more cheaply in this manner than by any other means of reproducing. BOX WITH WAXED-PAPER ROLLS HAS METAL CUTTING EDGE Waxed paper in rolls is being supplied in a special box with a metal cutting edge for quickly separating the required length. This paper has many uses in the kitchen and also is of service in wrapping around flowers and sandwiches. The holder keeps the paper from being wrinkled or lost. Waxed Paper in Special Box with Metal Cutting Edge for Separating the Required Amount

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ERR BR BBR BRUBSOABRSBSBSBL BSE IBSERBLBEED SAS ZS SZ SONS ONS NN SN NSS SS IN Wa ae er a3 Orr i iy . » ee 3 Wiss ‘ yy) 4 A t ; = . : ‘ 4 ys ; 4 f, “A ok vy As — --

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FAIS PAP PATA > NOSLOLs aX\ a SS POPULAR MECHANICS Frozen North Lives in Wax anid Sugar Skilled Museum Artists Create Realistic Imitations of Eskimo- land on Miniature Stages of Oilcloth and Wood ough lifted from their natural set- erver in the museum, who can gaze act of the trozen north or intimate ciré es, shrunk to convenient size and “miles” away in magic cabinets, vivid of the life of the Eskimo tribes r north have been placed in ublic Museum of ukee, Wis., in an bit of miniature They are part eries which will 168, large and ta vhen complete. about three ‘ clay, sugar ee deep, six feet in imitation | family about loo “fireside figures, model the scale ot an inch to the stand in lig! booths oF as six feet aX, strips ot »o realistic are t! m and pieces d, scientists impressions tists have re looking ed expanses ar landscape roups of na- it their daily g and domes- enes. - Practi- every side of life in the one may ¢« imagine he is 1 ing through a | window in northe climes. rhe tures” are tl signs and cre north is dis of C. R P Modeling a Polar Bear “Actor” for One of the Scenes; 1 to the ob- Note Size of Finished Group in Background modeler 11 e

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POPULAR MECHANICS are obtained. The scene ready tor the “characters.’ have been modeled first in cla ter molds formed and the figures produced by pouring wax into the molds. Bear Eskimo men, women and « and various animals are made way. They are given realisti and are staged to show to t advantage the part that eac! to “act.” All furniture for views, the arrangement of the and the poses and actions of t people are studied out and ba authentic sources, then ex with greater care and delibe: than are used in plotting a sc the theater. In gathering for other groups for the museu directors and chief artist and ants go to various parts country and after careful e tions in the region that is to b construct a small model on t which is shipped back for rey g Wax and Svgar “Snow” to Produce Realistic Arctic tion - larger form. : aaa Reie tehems os Taleo frequently, in Indian or groups, natives who are famil Six groups already completed rep- the life that is to be portrayed are resent a vear’s labor. Each group has been criticize the work of the scientists a1 posed from the most reliable data of ex- suggestions are often valuable in plorers and scientists. The linoleum back- an accurate finished display. Scene ground is painted first and the colors are ing bird, fish and mammal life and applied to the smooth side of the material. portant reological formations f1 By carefully mixing wax and sugar and parts of the world are being included painting on realistic shadows, various snow museum's series of these realistic effects are secured. The ice may snap with Similar to ordinary practices in an appearance of extreme theatrical stages, cold or tracks depicted in . grounds ior some the ground may give the 5 landscapes are pr: appearance of melting or he on a series oft otter snow. Repeated ex- . frames that blen periments are made with ; ; -_ one another to ( the lights and the shadows a S appearance of « before the desired results ' | when Behind the Scenes; ‘“‘Making Up’ Small Figures, Modeling Animals in Wax and Painting the Back for Realistic Arctic Stages in the Museum’s Specially Equipped Studio

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POPULAR MECHANICS DOUBLE EXPOSURES ARE EASY LIFELIKE ANIMAL MUMMIES W!TH SHUTTER OVER LENS ARE MADE WITH FLUID 1 king two pictures on the same Lifelike mummies of various kinds of film, a double-exposure shutter animals for museums and laboratories are eras has been invented which lf of the lens as each photograph edd It is easily attached and removed when the entire lens is Made to fit either a box camera folding types, it has no parts to get yrder. TENT WITHOUT CENTER POLE EASILY CARRIED ON AUTO minating the center pole, increased ir the camper and greater ease in are provided in a folding canvas signed especially for automobile Lengths of light steel tubing i ft - oT pyrigh enr iller . mide pk bce The cop fhe Preserving Carcass of Rabbit with Mummifying Fluid idjustable screw shaft that auto- to Restore Original Colors and Tissues locks in any position and is at- to four cross ribs, one from each said to have been prepared successfully by of the tent. It can be raised or the use of a patented fluid. The substance is declared to be similar in composition to the drugs used by the Egyptians in pre- serving their dead. It is said to restore the original colors, size and softness to the tissues and to keep them indefinitely. LOCK BOX FOR MILK BOTTLES GUARDS AGAINST THEFT For safeguarding milk bottles. packages of groceries or other articles delivered at the home from theft, a cabinet wit! that cannot be reopened from the outside 1 door unless an interior lock release is set, has been devised. It is designed to be placed in an opening in the wall of the house so that packages may be removed directly into the kitchen or storeroom. T1 locks each time it is closed and ca ; the Umbrella Top of Roomy Tourist’s Tent opened again from the outside onl by Turning the Shaft Handle d somewhat like an umbrella. In the canvas is loosened to pre- tretching in wet weather or can be ned in heavy winds. The tent is enough for a double or two single nd has ample dressing space besides. ewed-in canvas floors and a storm lhe entire outfit folds up into a ing bag that fits on the running board. +) Cabinet with Front Door Open and Shut; Set-Lock Mechanism on Side Wall tt much larger than a blue-bottle fly, mming-bird found in Central America releasing a catch which automatically sets 1 ] iid to be the smallest known bird. the lock again when the door closes.

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POPULAR MECHANICS PRESS PRINTS MANY COLORS AT ONE IMPRESSION fo print any number of colors at one impression, a press has been invented that is said to work equally well on paper, glass, ~~ ah | L ae - ~ I nventor with Press that Prints Several Colors at One Time on Paper, Metal, or Wood tin, od, and other substances. It is so constructed that the surfaces of bottles, jars, and similarly shaped articles can be put through the process in a single opera- tion. Built for newspaper work, the ma- chine, it is claimed, can reproduce illus- trations in several shades in much less time than is required for other methods. By reducing the number of presses necessary to print such matter, it is believed the ap- paratus will greatly reduce labor costs. INDICATOR ON AUTO HEADLIGHT WARNS IF LAMP IS OUT Attached to the upper rim of automobile veadlights, reflecting indicators have been lriver of anv tailure MIRROR Red-Backed Auto Headlight Indicators which Are Plainly Visible from Driver’s Seat of the lamps. The back side of the is red and serves as a warning sj other motorists. The indicators parts to get out of order, are easily, keep the autoist aware of t! dition of the lights, and are ornar They project just far enough to cat rays, but do not interfere with t! ciency of the headlights. SEA TIDE HARNESSED BY DAMS TO RIVAL NIAGARA’S POWER By harnessing the tides in the B Fundy between Nova Scotia and Brunswick, approximately 500,000 power will be developed, it is esti: by engineers who have made preli: surveys of the project. It is plam construct a series of dams, five miles which will hold the water in an upp¢ lower reservoir at the change of the 1 The power plant is to be located bet the levels, and gates in the dams w the water to flow through the powe: veloping station at a volume esti ereater than that of Niagara. LOCK ON TELEPHONE PREVENTS ITS USE BY STRANGERS Locking a telephone so that it cam used except by persons having a |! Telephone Secured with Padlock and Pin that Receiver Hook Down possible with a simple device having four parts. The receiver-hook bar 1 down by a pin through a bracket that ries a padlock. The attachment is p quickly. It is attractive in appearance its use is said to result in a conside1 reduction in phone bills. @ Just when the demand was at its lo ebb for months, 2,000,000 brick and bags of foreign-made cement arrive New York. This constitutes one ol largest shipments of European bull material since the war.

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A | Al Ir spector Davis, of New York, Explaining to Hon. K. R. Wang, Chief Ir China, Police Department, Signals Used in Regulation POPULAR MECHANICS ‘(O PARKING GREATER PROBLEM THAN SPEED By JOHN IHLDER Chamber of Commerce of the United States n point for automobiles is the answer is to limit more strictly the incapacity of streets use of automobiles but even in towns and perhaps confining it more Caf&rs. serve a greater number of passengers ng game of regulating traf- call for only a fraction of the parking e more dramatic, is not the Sucl an space 1a solution as this is no solution, but rtant part of the problem after is rather a method of intensifying condi resent need is to find out what tions that make for further overcrowding automobiles, not when they of our already overcrowded ¢, but when they are standing means immedi- some inventive genius in- lapsible car that can be folded tor dealing wit! ut into the hall closet or a the standing the office, this question is FO aTeas, The ately available i automobil se more and more concern to urers and would-be owners uspector of the Shanghai, Manhattan of the Traffic in been caused by justices of | n eye tor local revenue ive been tentative at to answer this questi sfactorv tha have given “ir ofttices moderate ized police and the most dissatistied ith each other. ation of this prob- regulatcry authorities roach it from the point of view utomobile owner is more or less » should be thankful for toregoing, re grudgingly granted to park their c: ‘xperts who maintain other vo or three riders in an more space in a city times that number trains, thereiore

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878 POPULAR MECHANICS “BOOSTER” PHONES SPEED TRAIN DISPATCHING Dispatching trains by telephone, a_ It is c'aimed that one dispatcher method that is supplanting rapidly the use arrangement can handle a thir of the telegraph on many lines, has been’ ness. The switchboard, with the further improved by means of a “selective” each station written under a le telephone system in use on a western rail- ing each operator, also has a ——_——4@ = “Selective” Telephone Switchboard with Which Operator Calls One or More Stations Simultane road. Instruments are so connected that’ by which all the telephones on tl any station may be called without disturb can be connected tor a simultane ing the others and several operators may _ sage all alon; » line. A retur licates tl 1e elephone at listen in at once without impairing the efficiency of the circuit. The receiving ap- ing station is ringing, thus preve paratus is provided with a “booster” operator giving the excuse that mechanism that amplifies the transmission. did not sound. HOPPER BOX THAT SORTS NAILS one time and held in position for SAVES CARPENTERS’ TIME As the slots are emptied, more down from above and automat For the convenience of box-makers, into the grooves. rhe cabinet, carpenters on rush jobs and others, a_ in use, can be folded up like a hopper that sorts the nails and placesthem case. It weighs only ten pound in sloping slots where they - reach, has been manufac- JUNGLE PERILS FACED IN H » thumb and forefinger, any FOR BIRDS OF PARADIS! f nails may be grasped at . ; Because hunters threaten the « of the gorgeous birds of para Dutch government of New Gut sidering a law to protect them. the greater part of the country birds are found is made up of hi tains and vast, foul-smelling s\ jungle, hundreds of gunners, lure rich returns the gaylvy colored plu in the market, brave these perils e Sometimes a party is compelled to months amid the perils of poiso1 glades surrounded by deadly rept tile savages and prowling animal most sought-for variety of the plu those of the blue bird of paradi much as $500 has been paid for specimen, while red, brown and f ones command prices from $25 t Honper Sorter Open and Tipped to Working Position; Five months are allowed the hunt Nails Falling into Wire Slots bag a supply of-the feathers, beginni

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POPULAR MECHANICS losing with the end of October. TOWER OF REVOLVING FLOORS ears ago about seventy-five of FOR PARKING AUTOMOBILES ls were transported to a small ir Trinidad in an attempt to cul- As a solution to the automobile parking m under protection of caretakers. problem, an Ohio inventor offers a circular f droughts and lack ofanall-vear steel garage “tower,” consisting of a num- ood. thev failed to thrive, until a ber of revolving stories arranged one above developed to place bags of water ree tops during dry spells and to egetation upon which they could is resulted in a large increase in ver of the colony, and those out during the past few years have icclimated and are now thriving. 1 FLUID IN VEINS AIDS X-RAYS TO DIAGNOSE DISEASE e diagnosis of gall-bladder ail- possible with the aid of a com- jected into the arm of the patient fects the organ in such a way that visible under the X-rays, accord announcement by Dr. E. E. fessor of surgery in Washing- Che X-rays have been of e in locating solid substances, ot been widely used heretofore yhotographs of separate or- "19 T I the living body. (INDOOR GOLF CUP FOR PUTTS Model of the Auto-Storage Tower with Elevator IMPROVES PLAYER’S GAME Toy Machines in Place vers are furnished amusement nce to practice shots indoors with several cars, which are to be raised to pos! device designed to take the place of tion by an outside elevator. He estimates an outdoor course. It consists that a structure of this type with twent ll, metal backstop, in front of which floors, thirty-six feet in diameter, wou 1a dise with brush bristles on its ] 1 de, Che object is to strike the ball 1 the other and each affording space ] } icl iold two hundred automobiles and mig! provide additional facilities f enough to lodge it under the stations. a! observation a shot that would land the ball center, or possibly a la ie in regular play. Ifthe ball is craft or an ai chor PLANTS SUPPLY ENOUGH LIGHT TO TAKE PHOTOGRAPHS ng certall kit 5s Oo intense beam ol Llovd, of McGill univer ino > r ing colo 2 ‘mi I he experiment, he ; ' glowed with brilliant red, into Indoor Golf Cup: If Bristles Catch Ball, : : , the Player Has Holed Out Ww oMen ind details of not be observed 1 — , ‘ Pf. - s lard, it will rim the inside of the nicroscope, were revealed. The roll out. Shots may be tried trom whic ‘ - lieved to be the source positions and a number of the cups m w, are thought to play a € an entire indoof course. nt part in the growth of the cell

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a Time and Money-Saving Tools When Gar- ments Be- come Shiny, ' - a Little Roller Set with Many | Needles, Run over the Cloth, Gives It a New Nay Below: Tray and Rack for Sil- er Protect Tablecloth and Pro- vide Receptacle for Ashes ut Marring the Woodwork or ng Steel Rubber-Tipped Clamp that Holds a Trapeze, ymnasium Rings or Swing for the Children Can 1 a Few Moments in any Doorway: Below Is a Novel Duck-Shaped Bag for Carrying the Bathing Suit Handles on Each Side Keep the Nurs from Rolling Away and Enable the ( Hold It; Tape or Ribbon May Be Ru: Them and Tied to the Crib; Below Is Wire Tong Lifter for Taking Fruit ] of Hot Water without Burning the Fingers Electric Toaster Pictured Below, Is Shaped so that Crumbs Are _ Brushed Away Easily and Large Heating Coils Crisp Bread Quickly

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———— for Woman’s Workshop Dipped into Boiling Water, then Drawn over the Roll, this Saw-Tooth Curler , Prepares Butter into Rose-Shaved Pat- Serving without Waste or Trouble Magnetized Tips of Serviceable Spring Shears that Cut to the Ends of the Blades Are Useful in Picking Up Needles in Home Clearing Table and Dishes Are Combined Easy Operation with Machine on Roller Frame Fits over Sink When Broom Wears Out, New Filler Is Inserted Easily in this Aluminum Holder at Considerably Less Cost than a New Broom Clothes Overlapping Below: Picture Hook that Leaves No Holes; Point Broken Off and Lef Portable Detachable R Legs with a Drain Pips o Washtub

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POPULAR MECHANICS SHOES ARE SOLD AT THE CURB BY WALKING “STORE” Without waiting for customers to come to him, a Mexican shoe peddler in Angeles, Calit., ties his Los about his »L- StOCK Prot rietor of Curb Trade Shoe Market with Daily Stock in Looking for Business shoulders and business. Prospective buyers are fittings on the street curbing and sales are usually followed by “spot” cash. "itl o rent iven- goes after viven or overhead expense t pay hi *O1 ient "a ness in “store” is said to doa le busi- the foreign quarter HOME OR OFFICE HUMIDIFIER REDUCES FUEL BILLS t - 5 , Air in heated rooms Tit throat s kept moist to pre- coughs and colds, by means of a small patented humidi fier which gene- vapor with pplied from rates heat su an electric wall socket. Water is supplied auto- matically by a fountain. vice is light or The de- attractive in appearance and occupies little space on either a desk or table. MINT FLAVOR COST IS R BY GUM CHEWING As a result of the great incre: number of gum chewers, the pric: used in flavoring has steadily mou two Michigan counties 4,000 acré voted to the production of the p of peppermint is also emploved ni steam boilers. If the odor escape cates the presence of leaks. A b will hold the smell of the oil is s capable of retaining any it is ordinarily raised on pressure 1 subjected. The marshland formerly gi) entirely to the production of kay. DRINKS FROM SIRUP FOUNTAIN MEASURED BY VALVE For serving evenly measured su flavored liquids at soda fountains, tank has been patented with a va cup that allow an exact quantity to pass out when the handle is pulled. The reservoir that feeds the measure can be kept filled automatically from a storage drum, or barrel. The appliance is said to adjust it- self to any wear on the working parts. A similar model is claimed to be of great advantage for oils and gasoline tions wl are to be apportioning ~ at automobile 1ere the amounts of sucl accurately measured wl ing into the containers of cars. At indicating the volumes drawn magazine can be attached if de motors, pistons, cranks, or similar tus, are used in the fountain, strongly made and does not easil\ of order. PULLER LIFTS WEEDS WITH(' LEAVING HOLE IN TURF Weeds in the lawn or garden are out by the roots with a puller whi crossbar handle long e1 eliminate stooping. It is designed does not cut the top of the weed fr roots but lifts it out in its entirety leaving a large hole. and a

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POPULAR MECHANICS ARMORED “TANK” AIDS WARSHIP AT MANEUVERS ng Sea-Going Tank from U.S.S. “Wyoming” upon Back of Submarine and Sturdy Fighting Unit Appeared “Going into Action’’ with Crew and French Field Gun at Bow as French field gun at its bow and demonstrations of the possibilities o ¢ through the water at the rate of fighting unit as a rapid-fire scout miles an hour, an amphibious, aid the larger craft. These tanks ed “tank,” part of the equipment of been developed for the use of the arm S.S. “Wyoming,” was given a thor navy where difficult and broken terri test at the maneuvers at Panama and must be traversed. They have endles in the movements of the cruisers tread traction for land and propellers, bot! ubmarines. It was one of the first run by the same gasoline motor. DOUBLE VISOR ON MOTOR CAP eves in a cap with an amber-colored ce SHIELDS EYES FROM GLARE loid visor that can be released from reak and lowered sufficiently to protect ts and others exposed to glaring sion. It is held in place by j + ts or the intense rays of the sun nand, when not needed, i 5 qui k] orded a convenient shield for the out of the way SEED TREATED BY ELECTRICITY DOES NOT HELP YIELD Claims that treating the seed rains with electricity increas« have not been substantiated by of government scientists. The pré sists In subjecting the seed to an current passing through a solu which it is immersed. “Grain vi such treated seed were less than fri sown with untreated seed.” it cme” “or by the department rricul Visored Cap with Amber-Colored Celluloid ceed sire . or agricu Lower Part Dropped to Shield Eyes experiments

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POPULAR MECHANICS Above, Some U: signs of Artist Ornaments Molded { ment, Including Boxes, Benches, Tr« Pedestals; Left, At Arrangement of ping Stones, with Rails Inse of Cement } Reinforced and Hand Below, Unique Forn time Sun Clock, C Concrete; Rough Surf Smoothed Down after to Produce Neat = sat Concrete Sun Dial that Marks Time on Figured Cir- cular Base Imbedded in Ground

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POPULAR MECHANICS \ ONE-MAN STUMP PULLER HELPS IN CLEARING LAND yl * Clearing Land with Windlass Stump Puller; Anchors Are in Foreground, One about Stump isting of a ratchet windlass and been-placed on the market. Anchored to vound up by means of a wrench bar’ two posts, the cable is placed about a third el to the windlass gear, a stump and, as slack is taken up, the “top stump” r that can be operated by one man has __is uprooted [RE GUARD PROTECTS GIRLS fits over the top of the device. If, in clos- WORKING STEAM PRESSER ing, the wire is touched by the hand or arm, it instantly stops the machine, thus elimi- prevent girl workers from getting nating all possibility of accident. hands caught in a steam-pressing ine, a wire guard has been made that SMELLING TWO MILES AWAY While elephants are known to have a wonderful sense of smell, the keenest- scented animal is said to be the rhinoceros. One big game hunter has stated that favorable weather this animal can “wind” a man for two miles. Most animals give off scent through their feet. The blood hound can “scent” the object of its search many hours after it has passed. The length of time depends upon atmospheric conditions. On a sharp, dry day, it does not “lay.” On a damp day, however, the \ | ts Wy f, : odor sticks to surrounding objects. PLANE TO ASSIST DOG TEAMS WITH MAIL IN ALASKA » To speed the delivery of United States q mails over Alaskan snows, an airplane for the postothce service was shipped to that ‘ territory recently. It will be used to sup- plant the dog team and pedestrian delivery service in part of the country. A con calling for ty lights each mor t! er months has made with the - Guard on Pressing Machine that Stops It if =e - at dee miormanon ma; Accidentally Touched by the Hand gathered, it is said.

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SS6 POPULAR MECHANICS

FISHING IN THE OCEAN WITH HORSE AND WAGON One of the most unusual methods of miles out at sea. Along this strip « catching ocean fish is said to have been de- Cod shore the tides completely co veloped in New England. While the use ocean bottom but, on receding, the of huge nets a few miles from shore is is not more than a few feet deep fo: s¢ common, this particular trap is different miles out. As a result, the fisherme: because of the fact that all the conveying start out with horse and wagon afte of workmen and catch is done by horseand _ tide starts to ebb, gather in the fis and the trap is more than two return to shore before the water is

“* Ae es o * * <4

» than Two Miles Out at Sea Which Fishermen Reach with Horse and Wagon to Collect and Make Repairs while the Tide Is Out

MAN-MADE ROCKS TO RIVAL for instance, probably could be artif THE WORK OF NATURE made but it would cost an enormou of money. \lan-made rocks may be one of the re- sult sof experiments now under way. Dur- BLECTRICITY REPLACES CLU! ing these tests the essential ingredients are IN KILLING CATTLE placed in little steel bombs and subjected to terrific heat and pressure, and in this Killing cattle by electricity has tanner fragments of rocks and minerals started by an Omaha packing com already have been produced. Thus science after several years of experimenting has duplicated nature’s processes, but ona_ placing the old method of clubbing small seale, of course. The problem now animals over the head, electrocution is to duplicate the natural product at pected to save a great amount of mo reasonable cost. A synthetic tombstone, and is said to be more humane.

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How Great Inventions Were Delayed ears of Effort Wasted in Search for Things Which Are Now Everyday, Household Necessities persons have heard the story of swineherd in China discovered riness of roast pork by licking his cers aiter digging out a roasted he ruins of his hut that had been ally demolished by fire. turies thereafter the conventional roasting a pig was to put the hut which was then burnt down. me brilliant genius had an in- result was the first crude gridiron. Thenceforth, pis y ~ + vithout the necessity of burn- ywner's dwelling. in development have been al discoveries. For countless ving needle had been made with the end opposite the sewing point. When more modern men be- gan to try to make machines retained the needle in its an- cient form. One after the other failed until, in ve turned the needle up the eye at the sewing is sewing they Suce esstul is calculated that 1867, vas the first ime of hi “ath, in $2,000,000 in the form of roy patents. In those fi money, and days that even today ed at. But the a result of th bi e sewing machine i use that a thimbl curiosity very boll of cotton contai! o be separated iron s called “ginning.” nthe southern states, as elsewhere, thi done by hand quiring the | of ‘many slaves who had to be fed and clothed even paid much in wages. Thi xpensi\ e and slow that the of cotton remained insignificant li Whitney, in 1794, patented his gin, which did the work of a thousand ves, and made cotton growing the lead- vassoe a vast ing industry of the south. I: weaving the cotton all kinds devices had failed to supersede fingers and thumb until, about a carpenter in the land, produced the spinning jen: would produce twenty or thirty threa¢ ereaves, ; +1 loTt ; } a time as easily % | nat ti been possible to spin a single th his n spun by it could only i or warp, or the achine had its defects, for sufficient fir longitudi industry struggled along as best it could until presently came Richard Arkwright ; who orig¢gi1 . } . modern with his frame, which makes number of threads of anv de gree of firmness an hardne Weaving al O had been d

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POPULAR icity many at ‘produce sounds at source. hese were ansmitting disk, nnectin O! ¢ them end to the Karly experi caused a membrane to open and electric circuit at each vibration. as transmitted through the circuit an electric impulse for every vibra sound ese electric 1n the At the receiving end acted upon an elec- ignet. n ‘ Ca Bell unsuccesstul experiments he prol | using a | oOpienml )\ Alexander -esident in ne Boston. irol ve, and which armature. thin upported al used in incan til finally filament made ‘and, suc lly un icuOUsS s] a \ rice incandescent lamp Wa ‘nt into world-w machines were operated processes analogous to lithography, \ ip ide use. writing or paratus worked on thestencil method. Numerous attempts to produce typewrit- ing machines had been made both in Eng 1 America, 1 led to no results \iter many experiment failures in this direction, finally in 187. Kk. Remington & Sons brought out all «ct 4 all of whicl er cal S 2 type-bar machine of whicl subse- Just a Few of the Handy Lamp’s Many Uses and Draw- ing of Lamp with Its Holding Clamp MECHANICS quent machines are modifications he type bar that did it typesetting the | loose type al the idea of In Was machines to use ordinary machines to set it hand. For a long time the nimble fingers of a in the way it it W rood ( is I favorably compared on the grou omy with any of these mechanical ments. Finally, Mergenthaler co the idea of casting type slugs ina with a kevboard operated like a ty The nimblest-tingered not compete with that. The idea of VDE I compositor heavier-than-air flvit chines was ridiculed for years centuries less attempts that were made to imit bird. It remained for the Wright br ina small American town to put into 1 tice theories propounded by scientist, Octave Chanute, on account of the many bictl \ wings in the form of plan warped. The than-air flying machine In the early days of the motive engineers wasted much ti lowing the precedent of the steam | tive. e immediately motor Their c and >the cars and loco: a railway train, until in 1895, Gi Selden, ot Rochester, N. Y., took patent on am arriage motor achine that combined « thing on one frame or chassis. nation with the motor was drove the propelling with which In ct a clutcl shaft, in c were reducing and revet ve ars. That was the prototype of the n ern automobile. LAMP HELD IN ANY POSITION BY STRONG SPRING GRIP With a spring grip that 1 to almost been made th exactly where a book Ea ol Old the ielf, or to a it permits the ray de ired Ru amps prevents t] 1O ‘ver 1 i @ 7 pol ished surtace inside with tached so firmly reflector enamel he holder t not easily jar loose qd We want all our readers freely and often whenever to they wis! ditional information on articles pub! in this magazine Address Bureau formation, Popular Mechanics, Chi write Wil

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POPULAR MECHANICS BABY SWITCH ENGINE IS DRIVEN BY “GAS”

t Gas-Driven Switch Engine Pulling Train of Cars; Being Run upon Turntable w ow and with Hood Raised to Show Engine | a load of 150 tons, a ate, and can be run b motive. driven by a gasoline or taching cables from the | ne, is being used ona French on other tracks, they can be mov switching cars in the freight coupling to the engine. \ ng only fourtons,itis more table in the vards quickly plac <1 about, costs less to oper- locomotive on cross tracks

DISHES CLEANED BY PEELING _ market. The device cor INSTEAD OF WASHING on which is mounte layers closely compt ng takes the place of washing in a_is soiled, the top | hich will shortly be placed on the’ a clean dry dish for tl DESK OF PRESIDENT IS TOKEN OF NATION’S GOOD WILL Made from the timbers of the “Re lute,” the rescue ship caught in a and abandot d in al ‘xpedition of Sir John Franklin in 1852, the at the White I v the presid constructed i : irom UQOueen Off the Top Layer Leaves Surface of Dish veo Clean and Ready for Next Meal good

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POPULAR MECHANICS Hazards of Dizzy by Aerial YNDAUNTED , heights and brisk wi sway their “bos’n’s cl ibove busy streets or hum: dustries, steeple jacks p precarious callings dan tower and chimney stack parent ease. Notwithstanding the safety appliances have be signed to assist these aeria y x ii | t neers’ to accomplish | climbs alott to their daily most of them resort to thi seat swung from a rope and for support, while hanging air over the edge of a sky or swinging from the pinna tall chimney stack. Although con sidered extt dangerous by the “man street,” steeple jacks who h lowed the trade for years no great risks to their tasks disasters are recorded among ranks because of the skil which hazardous undertaking carried out. Daily associatio1 the problems to be surmount working at lofty heights, the eliminates the fear of falling it the average person almost invariabl Where the “Bos’n’s Chair’ Affords Comfortable Sup- riences in high pl ices, It is pointe port for Dauntless Worker Hung in Midair High is just as easv to over Busy City Streets a deep hen lying on the the perils be ¢, however, with the free inside of build le knowledge ot ing, carpentry, nd attention igh metal chim frequently become at the top trom h tools and material, the climber must enter his frail-looking rigging and | mountainou ‘ights, sometimes making several times in e day. Often, tasks are con- fronted which require utmost care from the climbers. Where the brick summits of high chimneys have begun to crumble extreme caution is exercised to secure a safe sup- port for ropes and grappling irons. In many instances, narrow scaffolding has to be built around the defective parts of the masonry to provide footing for work involving any great length of time. It is then that the skill of the climber

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POPULAR MECHANICS iohts Scorned oineers for it or bsolute safety ‘ably provided ot high stacks raising workmen for future repairs. fastened to the top *s of the steeple jacks may But often even these pre been overlooked or the 1 out. Under such con- imber must become a nding footing wherever n proper distance of a which he can cast a rry the ropes for his chair. skyscrapers being built to th year, wider fields nt are steadily added to fforded aerial workers. ; | ist not only be carried to distances lreds of feet in the air, but the means t hile awaiting lodgment i th are necessary. Derricks have to be ' ed and transferred from one floor to a1 he structure develops. iggers, whose lish this worl , : it Tes Dangling from the other aid than ‘ir trained Ledge of a Lofty winding al out he } S ysci pe . an a I ling 7 rg ; Self Hoisting Perched I 1] i Chair that Climbs oa a the Cab’e as su) Crank I Turns and g¢g trom tl erectin load wi modern office cre 1 ~ th +1 l 1 - to balance the bur the cable. W1 occur ame porting apy serious mi steps resul rapid hand tangling le: by others OT During the e that the price « for every floor.” gent handli: tion of the construction ¢ heights undrea once familiar cra vators tor the rai

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POPULAR MECHANICS DISK SHOWS FERTILIZER NEEDS Ise in that day. While OF DIFFERENT CROPS against Greece v Wa being prepare earthquake, accompatr ied by vole determining the correct amount and _ tio1 ti Ok place, and the cont rtions of fertilizers needed for vari- Atlas li proj intis disappeared beneath tl] ous crops in different kinds of soil in the sea cCarrving with it everv ve once great nation. In additior dence from books, it has been dete 0 that the sea bottom in the neighbor! volcanic and that eruptions are ev: takin place. George F. Sim: lex., formerly State game den and professor of ornithology State and Rice universities, heads ent expedition, which is expected years inc leting its work. axe sor" ott sw srs AwITIO Mi “IMOT IT) | “NOY 1 ny Ree NED pr} islands, all far out of the paths traffic at nly halt a dozen habited, \ ot sixtee fs aaowew ane 27" ay Aseew their home the “Blos 109 f TWO-PIECE EASY CHAIR BUIL1 OF SPRING STEEL BARS : oer er ’ idicator to Tell at a Glance Proper Amounts of Designed b ‘ Aid ' Fertilizers for Crops hospita expel 4 . value oft a com a tabulated disk arrangement has prepared. On a small rotatis card are listed the different prod ~ 1 ( } > low e |o ith a key letter opposite eacl] ] ] ( 1 revo ved Ap t pports are sufhicienth ows the soil divisions tor tl a. . : ERE SON Givisions tor 1 p tl hair from tipping over \ © 1S place | letter belo ( hen the upper dis] SEARCH FOR LOST CONTINENT TO TAKE TWO YEARS 1 tound h the surtace of the 10,000 vears ago. here existed an immens ‘ Easy Chair with Two Steel Springs Which Are of Its Collapsible Frame st bevond the Straits ot Gubr: inhabited by a mi peoples who had cle \ eloped mec] ence and rocks. T he Canvas cover:r i slipped on the front like a pillow slip, and can be moved for laundering. arts to <% gher

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POPULAR MECHANICS 893 MOUNT EVEREST ASCENT TO BE ATTEMPTED AGAIN tors who ascend extreme alti- shield their eves from the intense rays of tain climbers oiten wear the reflected sun, carried tanks of oxygen ing, protectors forthe faceand and had costumes especially designed to carry supplies of oxygen to meet the rigors of the biting winds. They the rare atmosphere. The reported that often as early as 8 o'clock in ich they can go frequently de- the morning, the heat of the sun’ the efficiency of their equip- beating down on their backs cau

bers of the British Geographic Expedition in Their Weird Regalia Resting on Mount Everest bers of the British geographic treme discomfort who failed by only 1,700 feet quer the peak 1 reach the top of Mt. Everest Everv device kn tbove sea level, wore goggles to used in the eff ELECTRICITY FROM COAL SLACK operate mines over a |i TO DIG ALASKAN GOLD he, obtained at a practi lieved. * project old production may be increased . Charles | the near future if plans to use banks < in mining operations there uccessful Some $20,000,000 in (| is still lying in the gravels ot TIRE PUMP IS SELF OILING i valley, it is estimated, but the TO PREVENT LEAKS cost of digging through the round and pumping water from To prevent leaks cau has prevented extensive develop- of the washer on its ] is now proposed to usé coal slack has a felt disk soaked wi sub-bituminous mines that ie leather. By stopping 1 the Healy fields, 100 miles from pply of air is discharge for fuel to generate electricity of the piston, even after i umps and drills. The supply of for some time. With id to be inexhaustible and by uti- ment of the valve wl e abundant water power available small amount of months, electricity sufficient to pad and is absorl!

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POPULAR MECHANICS Selling Happiness by the Pound Modern Carnivals Carry Mechanical, Joy-Making Devices to Hundreds of Towns Every Week in Steel Trains 50% is sold by the pound throughout _ the result of organized effort and “ the summer and fall by carnivals and able at fixed prices which vary traveling amusement expositions in every according to the weight of the ship: village, town and city, the length and quired by any community. A fe breadth of the United States and Canada. ago forty-one carnivals were tour Happiness is dispensed by them with a country. There are over two hur consistency akin to that shown by any great business enterprise. Scores of me- sents a chanical enter- ment ot taining devices, $20,000 t thrill- giving ee 7s 000. It rides, glittering midways of day. ! owns steel ti double cars, an a busine . ; which “wonders, curi- ies , . ee en, 7% c ia of doll Osities and , ‘ , inve strange people ‘F “; sy a ane " Looked from the four ' corners of the earth,” and present miles of bunt- i as great ing are by no ’ ez —_— | dertaki means a matter AL : / ' motion of chance even ‘ = o oO industry if they do ap- 4 i oS Pm the mo. pear as though ' . baseball summoned by a - a censo! magician’s a _ wl Johnso1 wand. All of f . cago la these things are N : the dict perspect carnival

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POPULAR MECHANICS peek Shige a. eee * f es | ee etaad cas. aa on , % 6 (=) ~~] a Rage eds ge 4 P : storming Drab Streets into Thoroughfares Filled with Laughing Humanity, the Modern Carnival Bring Happiness to Over Two Hundred Communities Every Week

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POPULAR MECHANICS this form of amusement. He is the Will Hays of the movies and the Landis of baseball to some 200,000 employes of carnivaldom. In addition, éach state has its own local deputy who reports on his territory. Should anything untoward be discovered, the offender is forever barred from exhibiting in the United States and Canada. When a carnival comes for a week’s en- vagement, the town puts on gala attire and attends. Although the exhibits appear spontaneously, not a single detail has been left to chance. <Ad-

r if TWO ALIKE |) £ | - — LIT Z, vance agents, who travel durit ter months, have perfected all ments. Thus it happens that fr to forty cars of amusement stea railroad siding, unload their wonders and set up for a week's st carnival, unlike the circus, is forced to remain six or seven da exhibition 1 is unlike t! in that not

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POPULAR MECHANICS nlicated riding devices and make en it stays a shorter period. these amusements are conducted community plan. The various s and concessions are all owned te individuals, who in turn are e to the general manager. Each his own help, own electric-light boards himself as well as those | by him. Every night the profits are turned over to the treasurer, e end of the week, after deduct- s expenses such | rent, pays each his share. few years ago, al loaded its alia onto freight cars. Then it luty of the ad- nt to have wag- horses ready to he properties to nds This was “oilling.” To- carnival own bag rses, Wag- generally, two or three tractors. The wagons roll up on the flat cars, circus-fashion, and ‘are unloaded the same way. Such thrills as riding a ferris wheel, a1 aeroplane swing, or a caterpillar could never be experienced in the average cit) and town, were it not for the carnivals They bring, direct to the doorstep of every one, that first wonderful sensation that comes from mounting high in the air and being whirled about at record speed \ trip along the midway takes one through a replica of “King Tut's Tomb;” lets you shake hands with midgets peer up at tremendous live giants; have your fortune told; take a “tripto Mars”; see yout elf in innumerable od: shaped mirrors; enjoy the wonders of “the crazy house,” consisting of talling stairs and ut dulating floors, or go whirling about on “the whip,” and a multitude of other mechanical aids to happy | ¢ the Circus, the Carnival, with Its Glittering Wonders and Skilled Performers, Is Forced to Stay Several Days at Each Exhibition Point

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898 POPULAR MECHANICS ELECTRIC “SUNLIGHT” SPEEDS GROWTH OF PLANTs For speeding the growth of young plants made to produce crops of veg: and to give them a richer, greener and much earlier periods of the ye more vigorous appearance than ordinary now possible. With expensiv: specimens, elec- flower: tric lights are , , tric being directed = : = : be on them for = Se ae Eee quicke several hours in ~ : ESS ; velo; each night. é- ee the Many thus ex- posed are ree ported to have grown to al- most twice the size of those subjected to daylight alone. i xperiments showed that ' ma bean nearly all plants ra aa ; = lettuce having large * : gee = drag leaves, or thick a toons bap ane Leal mignon clusters of ; : : git Plant at Left of Each Pair Received Extra Aid of Artificial Light; i ot the Others Grew under Daylight Only frow were greatly tened ir stimulated by the artificial “sun.” It is to twelve days, while other flowe1 believed that with proper temperatures and longer and were stronger than moisture regulation, the process can be received only the benefit of day 11 Smail ones, PUTTY GUN THAT FITS POCKET invented. The end of the tool is s! TAKES PLACE OF KNIFE fit the space between the glass frame, and putty held in the barre For glazing windows, an angular-shaped from drying out and ready for i: “sun” that applies the putty evenly and _ plication. he gun can be c¢ firmly from a plunger barrel and can also the pocket by painters or repair be used for driving the points, has been with it a novice can apply the putt little difficulty. LAKE BUILT IN RIVER VALLEY TO RUN POWER PLANTS By harnessing the small rive plunges through the Deerfield Vermont, power for the operati number of industrial plants is to vided. Far below the 200-foot eart that impounds the water at the fo valley, lies the hydroelectric stati which 110,000 velts of electricity sent over a transmission line ser: miles long to Millbury, Mass. reservoir holds 38.000,000,000 ga water and to complete it, it was n¢ to move many buildings, several ce: and railroad tracks and to clear | of acres of woods and underbru @ Approximately 300 miles, or abo Applying Putty and Driving Points with Handy Pocket ot the Swiss national railway : Gun that Simplifies Repair Work operated by electricity.

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POPULAR MECHANICS e and Expensive Blooms Strengthened and Advanced by “Electric Sunlight’ Directed on Them at Night to Shorten Developing Periods and Produce Richer and More Vigorous Specimens

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900 POPULAR MECHANICS ELECTRIC FINGERS HARVEST COTTON CROP Guided by Workers, ‘“‘Tentacles’” of the Cotton-Picking Machine Quickly Cover a Wide Radius and S Bolls into Bags; Inset Shows One of the “Fingers” Operated by electricity, a cotton-picking machine has been used successfully in southern fields. Radiating from a central power unit are flexible tubes, at the ends of which are small revolving brushes. These whirling “fingers” pull the cotton from the bolls at the rate of one per second and the Metal Camera and Method of Reducing Printed Matter and Drawings in Photographic Form suction carries the fiber down the t large storage bags at the other end of these outfits is said to do the of five hand pickers and with it, one can gather from 500 to 800 pounds « ton each day. The fiber is said flufher when pulled in this manner. WHOLE LIBRARY PUT IN POCKET BY PHOTOGRAPHIC PROCESS Reducing a whole library to suc that it may be carried easily in the | is the feat of a German scientist. T accomplished with the aid of photog: printed matter and drawings bei: down to a scale of more than one i: while still retaining even the faint¢ tails, so that they could be read as ordinary print under the microsco} this process the Encyclopedia Brit could be reduced to thirty pages, ea them no larger than those of the ord magazine. @Tones of the human voice are e sixteen times in what is known a Joseph gallery, a cavern in one of the mines in Roumania.

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POPULAR MECHANICS 901 ERFLIES IN COLD STORAGE ARE REVIVED BY LIGHT revent their hibernating at times e public may want to see them, es in a large and beautiful collec- the London Zoological Garden are cold-storage cases where they re- rmant. When they are wanted for they are placed among flowers | with honey anda strong light di- upon them. Under this stimulus, yn regain their normal activity and ut to the delight of the spectators. LIGHTS SIGNAL AS AUTO TURNS TO GUARD NIGHT DRIVING nsure greater safety in driving an ‘bile at night, a system of rear sig- ts to indicate right or left turns, mps that show the path in front, een invented. The arrangement rolled by levers on the steering In making a right turn, for in- ,a touch of a lever throws on a rear hich shows which direction the bile is to take. When the car re- straight course, the light auto- ly goes out. At the same time, a Signal Lights Mounted to Show Position; Right: Small Front Lights Aiding on Turns in front, as the car swerves, throws a beam into the path of the curve, preventing accidents. PLUG TELLS IF FUSE IS BLOWN quickly indicate damaged fuses, a has been designed which shows the “Off” through the aperture in the er of its face by the action of a spring se when the plug is blown. The “On” is seen as long as the plug is ood condition. Overloaded current, ting in a blown fuse, moves this sig- aside and exposes the “Off” sign. CALVES FED BY RUBBER NIPPLE ATTACHED TO TIN PAIL Time and labor are saved in the usually unpleasant farm task of feeding calves that are being weaned, by placing a pail with a Copyright, Ewing & Galloway Calf Getting a Square Meal at Nipple Bucket Securely Held in Frame rubber nipple in the bottom in a wooden frame at a convenient height for the calf to reach, so that it can feed itself when the milk is poured in. This arrangement pre- vents spilling the milk and breaking the pails, and requires little time. STORMPROOF MATCH-BOX LID DEFIES WIND AND RAIN So that a match can be lighted in the wind or rain, a stormproof box holder has been made that fits into the pocket. It car- ries a small pack- age of matches. When the holder is slipped half way up the box, a com- partment is formed into which the lighted match is slipped through a V-shaped slot where the wind does not easily reach the flame. It is designed especially for the out-of-door season for the use of sportsmen.

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POPULAR MECHANICS Gambling with Death on the Speedway Auto Racing Kings Risk Lives through Love of Game and with Scant Hopes of Fame or Financial Reward *TORMING down the long straightaway on a sun-baked oval, skidding into steep- banked curves and flashing past cheering crowds in a throb- bing, roaring cre- ation of steel and rubber, may like sport to the casual spectator at an automobile race, but it is the hardest kind of work to the drivers. Also, it serves a practical purpose to t he ordinary motor-car owner—the man in the street—tor the speedway has ever been the laboratory in which the latest designs of the engineers are submitted to a fiery ordeal before being submitted to the critical public. Between the starting gun and the checkered flag at the finish, every part of the machine is subjected to a greater stress and strain than it would be called upon to bear in years of ordinarv service. Tracks of board and concrete that level as a billiard table to the spectator, contain undulations and irregu- hy seen Ralph De Palma look ds larities in the surfacing, despite the ut care in building, that are magnified a t sand times when the speed over the: reckoned at from ninety to 120 mil hour. At the opening of a speedwa | SS SS SS . . Sa ss Copyright, Gravelle Pictor Pit Attendant Signaling Driver His Position in and Number of Laps Covered

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POPULAR MECHANICS 903 thwest, one of selves, among them being “Tommy” ers had to be tes Milton, Joe Boyer and Eddie Hearne. ym his car at Racing is an expensive business as of 200 miles, the cars cost from $5,000 to $50,000. ly being cov- One big factory recently estimated ith bruises. that it would cost $750,000 to build obile racing is ; three racing cars and campaign them rdest way I ' fora year. Strangely enough, how- to make a ever, it is not millionaires who play this game. It usually is an inventor or engineer who wants to gain a reputation for his product or to ivelle Pictorial News Famous Pagoda at the Indianapolis Motor Speedway from Which the News of the Big Race Is Telegraphed to All Parts of the Country, and the Scoreboard declares Ralph De Palma. “Coal quickly prove its merit. One Kansas City is mere child’s play compared with enthusiast spent $30,000 in equipping two Racing requires the strength to stock cars with a special motor head for the rigors of the working day and the Indianapolis race. Neither of them without won a place. te sleep SS es 8 e+ 8 8 ae eo 8 a 0 a Oo a a On the other roperly hand, Sig red meals Haugdahl, after ivs at a years spent in It re- , barnstorming nerves on the dirt eel and the , tracks, picked to take 4 up a discarded eling airplane motor hment. which had been drivers . y built for the e ever to a government. ed into a , , < ;, aol Fitting it into seat and . .. ) a chassis, he ned there. —_ , ; took the car to of them , 4 Daytona, and raduates of negotiated a mechanics Fe + mile at a speed .0l like FO mH of better than mmy’’ . ' sates + 180 miles an hy, Harry : 54 s ~ a rt. hour. Some- rtz, “Age = ' SS what similar n and De = & we. NaS = was the experi a. A few ; ence of a garage been able mechanic in a nie Just before the Start of the Race—an Anxious Driver Giving His ‘ ; : itht them- Motor and Ignition a Final Inspection northern state.

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POPULAR MECHANICS: He rebuilt a small car himself. d overland to Denver and entered the Peak climb. Before the race, he d even have money enough to equip with new tires, but finally succee obtaining the much needed casings friendly dealer. In the contest, he dc: several specially built racing machine some of the highest-priced cars country. Professionals who speci the dirt-track contests in all parts country are paid from $100 to $250 a while their mechanics receive $75 t his is in addition to their railwa and they pay their own living ex; These cars travel in groups, or and enter contests at county fair contending against local drivers. Some of the professionals, howev: heir own cars and travel from o1 to another in them, stripping fenders and headlights just before e a race. One of the most succes these is a former locomotive e1 After winning his first race in a stock car, he abandoned his rail\ and devoted his entire time in the months to racing. Another is a garage mechanic who has gain throughout Kansas and the central Besides brute strength, racing re quick thinking, as the wink of an eye means the difference between life or and success or failure. One instan this took place during a climb to the o'-the-world” at Denver. Several In the Judges’ Stand (Top); Sig Haugdahl i “White Speck,” and (Bott Stop at the Pits for Tires mpyright, Gravell

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POPULAR MECHANICS Practice over the course up the Peak was permitted the morning hours. From the the finish could not be seen, so it possible for team vere entered. managers to he time of the rival drivers. of them, however, located a vantage ym which he could view both ends ourse through a pair of binoculars. d that his car was several seconds than several of the other entrants. o noticed that all of the cars slowed htly in taking the worst curve on LETTER ON WARSHIP’S TOWER MARKS PRIZE GUN CREW designating the battleship whose rews make the highest firing scores of in the United States navy, a large “E” is painted on each side of the mntrol tower and displayed for one It is from this station that combat is ted during battle or rifle practice. protected by steel armor, 20 inches the observers watch the ugh slits in the wall. HYENA STRONG BUT COWARDLY, RUNS FROM SMALL DOG hough it is one of the strongest mals, the hyena is a notorious coward vill often flee when pursued by a small Only when cornered will it offer but then it defends itself desperately. use of its skulking nature and its habit ing from refuse on village dumps and on‘left by other beasts, the hyena is in contempt among the natives of and Africa, where it is most com lv found. The strength of its jaws is ‘ent to crush the shinbone of a horse. action the climb. In doing this, the clutch was withdrawn and the throttle slightly closed to prevent racing of the engine. After over the course carefully himself, he ordered his driver to slip his clutch, but not to touch the throttle. This allowed the engine to race, but when the clutch was back again, the car picked up speed more quickly, although the spinning of the rear wheels wore out a pair of tires every time the car made the ascent. The result was that the slower car won the race. going thrown “E” Mark of Merit on Warship’s Tower Announcing Its Gun Crews as Fleet Champions

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906 POPULAR MECHANICS WORKING MINIATURE OF TOWN WIRELESS AS CAREER OFFE BUILT OF ODDS AND ENDS OPPORTUNITY TO MANY With odds and ends picked up about What kind of a job does radio of his home, an Englishman has constructed the young man? The question is at by Arthur R. Burrows, director oj grams for the British broadcasting pany, who declares that there is stantly increasing demand for train: gineers, research workers, telegra; men versed in commercial trade rout: with a knowledge of geography, y be intrusted with the _ installatio: maintenance of high-power stations mote regions. Knowledge of elect: ability to speak several languag: familiarity with music, so that the op: may be better able to control the el equivalents of the musical sound broadcast, are. desirable to those pect to occupy important positions Realistic are ot a be ~ ean that Move MUSIC IS USED BY SURGEONS hen a eel Is Turne TO EASE OPERATIONS a working miniature of a town with Music has been found of value bridges, churches and public buildings por- trayed in realistic fashion. At the turn of a wheel back of the model, figures of per- sons, trains and motor vehicles, connected by gears, are moved about the streets in litelike manner and lights appear in the windows. Spare time for several years was devoted to the construction of the ingenious display. gical operations to ease patient SHARPEN SHEARS AND MOWERS WITH CHANGEABLE GRINDER So its cutting surface may be changed when worn down, a sharpener for scissors \ . and lawn mowers has four grinding sides, Phonograph Supplying Music During a Surgical O When renewal i tion at a Brooklyn, New York, Hospita necessary, a screw and after the administration of in ft Melodies are supplied by a phonograj instrumental selections are rendered | artist. Several demonstrations have made at a Brooklyn, N. Y., hospital. he side of the bracket can be easily loosened, permitting another face of the rasp to be put in position Siege + for use. The tool §GMOKE SCREEN DISPELS FROST is said to do its AND KILLS INSECT PESTS work quickly and to require little exertion on the part of the “Smoke screens” and gas clouds, operator. Simply pulling it along a dull to those used in the war, are said to blade a few times is claimed to be sufficient been used successfully by Vidar Jer: to produce a keen cutting edge. a Swedish engineer, to keep frost fruit trees and to kill grasshoppet other insects. A smoke projector @ When you want anything and do not _ this inventor designed to aid in prot know where to get it, write Bureau of In- battleships from the enemy, occupi formation, Popular Mechanics, Chicago. two cubic feet of space, but can prod

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POPULAR MECHANICS 907 cloud of vaporous smoke at the rate re than 1,500,000 cubic yards per e. This fog, released over a budding rd, shields the trees in a protecting et and prevents radiation from the d, thus dispelling frosts. The in- r also believes that he has solved the em of producing a gas which will be to grasshoppers and other pests, but ot injure human beings or plants. IRON ISLAND FOUND IN PACIFIC taining nearly 80,000,000 tons of ron ore, Koolan island, off the north- coast of Australia, is described by a ector who visited the place as a “veri- lump of solid iron resting on the The island is uninhabited, is seven long and three miles wide, has an lent harbor and thousands of tons of are believed to lie in beds extending the sea. Tests have shown that the ontains little sulphur, phosphorus or impurities. FORECAST OF WEATHER WATCH IS TWELVE HOURS AHEAD the convenience of sportsmen and elers, a weather watch is being made in and which, it is said, will give accurate asts for twelve hours. It can be car- in the waistcoat pocket, and the read- ; obtained by noting the wind direc- Another type of foreteller is used in inction with a barometer, consisting rass plates, five inches in diameter, en- ket Weather Watch and Forecast Scale Below, Give Travelers Warning of Approaching Storms A third combined ved with a scale of forecasts. e of instrument has been th a barometer. DUMMY OF BASEBALL CATCHER AIDS INDOOR PRACTICE With the aid of a small indoor cage, con- taining a target placed back of lines to represent the home plate and the* “Canvas Catcher’ as Baseball Target for Practice Indoors or Out of Season Pitching batter’s position, baseball pitching practice may be obtained regardless of the weather. The target is made of heavy canvas and is attached by metal evelets to a portable frame, six feet high and four feet wide. The life-size figure of a catcher is painted on the canvas and a scoring chart below gives rating for balls and strikes in train- ing. The “strike area” is plainly indicated on the figure of the catcher in heavy red lines. As the ball hits the canvas it re- bounds and on a smooth surface will roll back to the pitcher for another delivery. The target is also an aid in batting practice and for coaching individual pitchers or squads. It is made in two sizes, one for girls or boys in elementary schools and the other for students in colleges. LOCOMOTIVE WHISTLE IS HEARD THREE MILES AWAY So that the warning blasts of locomotive whistles may be heard a greater distance, a whistle has been patented that projects the sound waves upward and outward above the muffling blanket of smoke and steam that pour from the stack and fre- quently smother the alarm signal. Tests are said to have shown that this whistle can be heard distinctly three miles away. The sound waves are directed by an in- verted, cone-shaped sleeve on the exterior of the bell part of the whistle.

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90S POPULAR “SLIP” OF EARTH IS REVEALED IN PHOTOS OF STARS By photographing the stars from time to time, a machine, known as a “Zenith tube,” is said to indicate the distance land slips each year. - lhe earth wobbling ha Copyright, Keystone View Co. “Zenith Tube’ Which Shows, by Photographing Stars, the Distance the Earth Slips Each Year axis is believed to cause the conti- nents to move. Prof. F. B. Littel, designer of the tube, asserts that the United States is slipping from twenty-six to fifty-four feet annually. Pictures of the stars taken by the apparatus are compared with those previously made to estimate the amount of change occurring at certain ground posi- tions. The stars are said to show the ex- tent of the movement by the distance they seem to travel away from designated points. on its BLACK BRICK AND GOLD TRIM USED FOR SKYSCRAPER ,lack-face brick and gold-colored stone have been selected for an office building to be constructed in New York City. Believ- ing that the stvle of decoration would re- lieve much of the somberness of ordinary stone work, the architects assert that such a color scheme was used by builders in ancient Pompeii and in France during the time of the empire. They also state that it may be seen in some of the public build- ings of Brussels. The walls are to be of rich black brick trimmed with stone of a MECHANICS golden hue. The shade of the stru it is claimed, will offset the effect ; windows which appear to be square | holes in most modern office buildings additional feature wil! be the fact that ninety per cent of the floor space will within twenty-five feet of windows. WATER RAISED MILE IN MINE BY UNDERGROUND PUMPS Energy sufficient to raise water from t depth of a mile underground, which me the driving of pumps against tremen pressure, will be provided by an inst tion of electric motors in the Micl copper mining district. The actual dept at which the pump will work is 5,256 f¢ which is so great that a relay pump installed at a middle level of 2,450 feet low the surface. The pressure of the head of water with which these pump have to deal will be 1,200 pounds to t square inch at the bottom level. Cham! will be hewn out of the solid rock to commodate the motor installations, will be designed to work eighteen h day in the high temperatures encounter STREETS CLEANED BY BAMBOO BRUSH ON A TRACTOR Driven direct from the tractor motor street sweeper has been made with b boo bristles which are said to be supe to hickory, as ‘they are more pliable the brush operates in sight of the drive: is easy to maneuver and is able to hat Street Sweeper Run by Tractor Motor, the Bristle Which Are Made of Pliable Bamboo snow ten to twelve inches in depth. > eral speeds are available, and the brus so built that it can be refilled at any tin

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POPULAR MECHANICS 909 CAMEL TRAINS OF ARMY SPAN HISTORIC PASS “ “2, 9°% pply Train of British Army Wending Its Way across Pontoon Bridge Constructed by Engineers to Speed Movements of Forces through Treacherous and Historic Khyber Pass military operations in the rug steep cliff, the way is only fifteen feet wide fastnesses of Afghanistan and is cut into the side of a limestone rainst the forces of nature as’ ledge. Through this gateway to the plains between men. In recent of Indiain the last 2,000 years, have ec! ‘e, supplies for the British the footsteps of the hosts of Alexander and conveyed to the historic of Persian, Greek and Mongolian conquer s on long camel trains across ors who have gone down to defeat in the bridges. At one point over a_ | 1i0oed ) loftv mountain summits of the region. LEATHER FROM TREES RIVALS paratus. An appliance also is made tl HIDES IN TOUGHNESS takes up dirty water by suction, thus pre venting it from settling in cracks and co: the red beechwood tree is said ners. The implement can also be used { been treated successfully by an dressing and renovating linoleum. n chemist in such a way that it sed as an efficient substitute for ole leather. Trees from fifty to rs old have been found best for the nd are cut in the spring. The eeled, steamed and treated by a hemical process under different It is stated, also, that the can be sewed as easily as leather. ELECTRIC FLOOR BRUSH SAVES TIME AND LABOR luce the time and labor required to | polish floors, an electric scrub- ng made that takes power from ry light socket. Old varnish can ed by a special attachment that pad of steel wool over the sur- “remover” has been applied. other finishes may be spread by ne in but a fraction of the time in doing the work bv hand. the Cleaning Floor with Electric Scrubber; Above, “‘Close Up” of Apparatus and Brush Attachment vement ot the dev ice producing and even gloss. Disks for sand said that less effort is needed to oper and brushes for dusting and the machine than is necessary to ru ors are furnished with the ap- vacuum cleaner.

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POPULAR MECHANICS Placing Hoppers of Feed on the Fodder Train Which Provisions 5,000 Pigs in Half an Hour; Right, Prize Hog Worth Several Thou- sand Dollars Section of Diamond Bar Ranch in California Where Only Two Men, Aided by Scientific Methods and Motorized Implements, Care for Hundreds of Pens of Hogs, Raised under Ideal Conditions

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POPULAR MECHANICS THOUSAND PIGS ON RANCH 'EN MODERN “LUXURIES” ng pigs under highly scientific ; is accomplished on a large scale ranch near Los Angeles, Calif., more than 5,000 prize porkers re- e exclusive attention of two ex- the business and are surrounded ctically every “luxury” known to swine breeding. Houses of the type of construction are arranged lat after the manner of military bar- ith ample pens and pastures, and track between the rows on which r-driven engine hauls small carloads use from the city tables for feed. than thirty-six tons of garbage are uted dailv, and the arrangement of uughs and of the feeding machinery ell adjusted that the entire herd can in half an hour. From the day the re born until they are killed or sold, re tended with exacting care,andthe of the task has been reduced to a um with the aid of modern inven- Pure-bred stock is cultivated, a boar exhibited recently being valued (HM) LIGHTER FOR WATER HEATER ACTS FROM ANY FLOOR chable to any coil water heater, an itic lighter has been designed which operated. from any floor of the home. A patented device is installed in the pipe which regulates the flow of gas to the burner and provides a_ pilot light. A chain is connected with this and conduct- gas a wall By lifting hain to a n the plate is turned the pilot a flame. ping the rom the hook turns off the heater. does the lighter save trips to the nt but is claimed to save waste. 911 MAKING FURNITURE OF SPOOLS IS HOBBY OF WOMAN Seven hundred empty spools were used by a Washington woman in building a cabinet in her first attempt at carpentry. “af bee See Seeicicn Copyright, I od & Underwood Odd Cabinet Built by Woman of Seven Hundred Empty Spools Held together by Nails Fastened together by some 800 nails, the pieces formed a serviceable article of furni ture which has attracted much attention because of its odd appearance. The suc initial effort encouraged her to attempt the construction of several cess of her has other household appliances. SAFETY AUTO “GAS”-TANK CAP IS ALWAYS IN PLACE 1 1. 4 ‘6 Removal of the auto Pas -ti 1 } often results in breaking of thet letting in of dust cap entirely removes In appearance like fers in constructi side are separate. a flange on the side bi neath it, and thus valve. The hole lett enough to let in the | tank is never be removed. being filled

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912 POPULAR MECHANICS MOTOR CARS ON SIX WHEELS signed. Eleven different sized ute; CONQUER SAHARA SANDS in the bunch and a screwdriver: ranged that it becomes the handle : Scooting lightly over the shifting sands one of the set. Because of its ; of the Sahara desert, a caravan of auto- ness, the device is said to be a co; mobiles not long ago traversed a 500-mile instrument for automobile owne: wrench for almost any nut on a c; cluded in it. Any of the tools ca: selected and quickly extended for | strong, light metal, the imple claimed to be able to accompli tasks without damage. DRINKING CUP THAT IS EATEN HAS CHOCOLATE COATING In connection with the daily lunches to pupils in many scho: has been introduced which the « after drinking the milk it holds. of graham and other cereals, with of chocolate on the inside and Modern Six-Wheeled “Ship of the Desert’? Mounting Crest of a Sahara Dune stretch of the country, proving that the modern motor can conquer obstacles here- tofore considered unsurmountable with- out the aid of camels. Six double wheels afforded traction in the loose sands and distributed the weight of the vehicles so evenly that they did not sink down. The French government has sponsored the ex- peditions for the purpose of survey and discovery and to open up secrets of the inner desert, parts of which are believed never to have been seen by human eyes. “NEST” OF FOLDING WRENCHES HAS SCREWDRIVER HANDLE So they can be folded to occupy no more space than a single tool, a “nest” of S Drinking Cup Used in Schools that Is Eaten wrenches. built on a pivot, has been de- Pupil Has Swallowed the Milk It H place of the crackers supplied smaller children. The quantity 01 held is about equal to that in a teacu NINE MILLION PERSONS DA RIDE IN CITY’S ELEVATOR More than 9,000,000 passengers is estimated, are carried by the el in New York City. This number ¢ the number of riders on the street r subways, and electric lines, it 1s sa many large buildings traffic rule schedules are observed almost as ‘Nest’ of Ten Different Size S-Wrenches and a Screw- lously as those of large railroads, driver that Forms Handle for Tools that adequate service may be render«

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POPULAR MECHANICS BUGS FLOATED OUT OF SOIL (O PROTECT CROPS e aid of a machine which floats bugs from soil, scientists of ltural department are studying ind numbers of various para- destroy crops. Because many e pests make their homes in the has been difficult to tell which ivaging vegetation. Samples of ed in the floating device are drive the hidden insects to the here they can be seen and [t is believed the instrument will preventing much of the yearly gricultural products, by making e to prescribe remedies to fight ular pest responsible. WRIST WATCH WINDS ITSELF BY SWINGING PENDULUM by a farmer during his leisure wrist watch that winds itself has ittention in Tennessee. It is ve a pendulum that swings back as the owner walks, and this nt winds the springs.

Testing Soil with Machine that “Floats” Bugs and Worms for Study and Numbering

BAMBOO ORCHESTRA TONES VIE WITH “JAZZ” aid to rival the notes produced <lern metal saxophone are blown ers of a Manila orchestra on their truments. Variations in the | diameter of the pipes of the saxophones cause different tones and some of the plavers hay incre ase the range. rhe e devised crude stops to abundance oft the wood p! aces the orchestri Meguipmer t wit! in the reach of thos

e of

Queer Instruments of Bamboo Whose Tones Rival Those of Metal Saxopl noderate meat nes

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; + Mat , 2 rat. Straight Skirt and Slip- = J ‘ F ae = ; r over Jacket Give Stylish ae : ; we ait i Just De Th Lines to This Knitted - ; ree mer Day Is This Sport Suit Effectively Dress of Embroider: with Rows of Tiny Worn with Light Comfort, Style and Utility Combine Talon An Orch Straw Hat with Scarf in This Pretty Blue Chambray Apron. Hat Adds Ct! Trimming Simply Made, to Be Slipped over the Most Delicate Frock, It Is Be- coming and Easily Laundered Soft Felt Hat of Tan with Brown and Gold Side Orna- ment Completes the Sport Costume A Rose Taffeta Paras “Mushroom” Shape Aff oP a Flattering Protection Cinderella-Like and Fascinating the Hot Summer S$ Are Evening Slipvers Made of a Variety of Gold and Black — Peeirtnersuserscsercecarssdsceccercscscescecrsssssrss=| Metal Combinations *

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id the Season’s Odd Fads and Fancies

° ~ Tailorec ; I “Black and White of eo — < i a Si Fashion's Favorite, Is Mannish Lines. A Emphasized in This Black -Fitting Black Hat ; ‘ Satin Mandarin Sty le White Gloves Attractive with Its Bright Green Silk oat Embroidered Cuffs Folds, Buttons, and Bands Woven in in Whi te Contrast } the Fabric, Is This Cool-Looking . and Gold . Fe Sport Suit of White Silk and ? . ool Crepe Sé€

k | Shape. Back ' - tee _~ “New” Sandals with Cut-Out Design Plain, with Slender Strap _| ! Instep, Come and BI . Leather usSssccssscssssssssssess RcCatine over in Patent slue Calf

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916 POPULAR MECHANICS FLOATING PLANT SUPPLIES WATER FOR REFINERy cially equipped with trical devices to op without attendants a the pumps have started, and any of floats may be ret without interruption t Above, Floating Pumping Station and ‘‘Flexible”’ Owing to a change in the course of the river, an Illinois oil refinery installed a floating plant containing two pumps in the stream. Resting on six pontoons made from former pressure tanks, the building, which with its contents weighs several tons, adjusts itself to the rise and fall of the water, while a flexible joint in the sup- ply pipe allows a section of the line to move up or down, The station is espe- PLANT WRITES OWN HISTORY WHILE SEALED IN BOTTLE Instruments for measuring the sensibili- ties of plants are now in use in the Bose institute at Calcutta. There is one which enables a shrub to write its own digestive history. A section of a plant is placed in a bottle of liquid containing carbonic acid From this runs a glass tube, at the end of which is a valve connected electri- cally with an automatic recording machine. o: sas. Pipeline that Carries Discharge; Below, Interior of Plant Showing Balcony and Motors in Pit machinery. The are located in a pit s feet below the floor a: surrounded by a baicony from whi spection of the equipment can be ma: bridge carries the discharge pipe fron plant to the shore and serves as a 1 for workers to reach the station. The over which the pumps are placed has | dredged to a depth of fifteen feet to ir a constant source of, water supply. f of the pumps works a week at a time can handle 12,000 gallons of water a mi: As food is assimilated, oxygen is give’ and this closes an electric circuit rings a bell, as well as operates a pen moving scroll of paper. Another magnifies the rate of growth so that be observed easily. @The Popular Mechanics’ Bureau oi formation offers its free service t readers of our magazine. dresses of manufacturers and dealer: be furnished by addressing the Bur Names and

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POPULAR MECHANICS TURTLE HEART BEAT RECORDED BY MOVIE CAMERA rt beats of a turtle have been suc- photographed by the motion-pic- mera, which also has recorded the in sheep and goats of removing the gland. The heart was photo- at a five-inch range and the pic- arly showed the rhythmic expansion ntraction of the muscles. The effect oving the thyroid gland was demon- by putting the animals through a he normal sheep almost invariably the right turn, while those without ind acted in an indecisive manner ually took the wrong path. BLOWTORCH WITHOUT PUMP ALSO A SOLDERING IRON t can be used as a blowtorch and for ng, a heating device that burns gaso- as a removable iron which may be off in a few seconds. No pumps or are necessary to carry the flame to »zzle, and it is claimed the heater can ced over a gas fire, in case it is needed ly, and made ready for work in 35 ds. Low-grade fuel may be supplied ppliance, which, it is said, operates and does not require frequent ad- ent. Because of an almost perfect ire of air and gasoline, no carbon is edinthetube. As it produces a long, ed flame, the torch is convenient for in small openings and other places rch without Pump or Wick that Has a Remov- able Iron for Soldering | to reach with ordinary soldering tools. in weight and equipped with a hand it is easily manipulated. here are approximately 3,000 vessels in lapanese merchant marine, according ent estimates. 917 DUST EXPLOSIONS ARE CHECKED BY GOVERNMENT TESTS Dust from grain elevators and mines‘is being tested constantly by government ex- perts in an efiort to prevent disastrous ex- Globe in which Dust Is Ignited So that the Force of Its Explosion May Be Measured A globe has been devised b scientist in the department of agriculture in which the dust is ignited so that its force may be accurately measured and preven- tive measures devised. plosions. SEA GULL’S HABIT IS CHANGED BY LIFE NEAR CITIES Sea gulls inhabiting the waters of Great Lakes no longer move south for the winter as others of the species do gather a scant living along the waterf: and from heaps of near-by during the cold weather. At the s end of Michig thousands birds congregate when stops and forage far the reiuse Lake steamer inland for cause ice prevents them from catcl t in the rivers and lakes. Thus they often may be seen at farmyards four or miles from shore picking up grain and other morsels. In t when the fish have grown inhabit the surface waters, certain gull are not infrequently found chasing mot! and other insects above neighboring five scattered 1@ autumn too large to 1 }

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918 POPULAR GUN THAT FIRES TWO BULLETS A SECOND GUARDS BANK Easily handled by one man, a speed rifle adopted by a Chicago bank as protective equipment, fires thirty-two shots in sixteen ew eee Bank Guard Demonstrating One-Man Speed Gun that Fires Two Shots a Second seconds. The weapon, which was brought [ Germany, has'a round magazine at from which the bullets are fed to light construction, the said to be readily operated and can veniently placed for emergencies. eapon is surrounded by a pertorated metal jacket to protect the hands in case the barrel hot, while air is per- to circulate through the holes for e the piece. side chamber. Of gun 1 be cor ‘| he becomes OVER HUNDRED MILLION LIVING IN ELECTRIC-LIGHTED HOMES | ‘tric lol ire now used in the homes aly 111.000.000 nd one-half per cent of world’s population, survey. In the persons, the recent 39. 000.000 according to a United States, persons enjoy the benefits of electric serv- eading all electric power with ice in their homes, this country | others in t used each Japan is ) 23.000.000 ; in electrically lighted hggs ands y is third with 8,810,- OOO © Ser cent of all people in New~i ™ electric lights. 1i@ amount ot second, MECHANICS “NEW ARRIVALS” THRONG AND FOREST June and the months. of early are important ones to hosts of livir tures in forests and fields, the “n rivals” testing limbs and wings an educated for the life ahead of them foxes, born in April, are being tau, rudiments of their craftiness, wolv: had their eyes open but a few wee! are learning to eat meat. They quit parents in November and December, “graduated” from the family circ] full independence in less than a year woodchuck or common groundhog legendary powers of weather prophe tract considerable attention in Feb: is born in the late spring and ear! mer. The young are leit to shift for selves when they are a few mont] Myriads of insects also make the appearance and the warfare betwee: ous species and for food is begin: annual cycle. GARAGE BUILT OF AUTO TAGS IS PROOF AGAINST RUST Tightly sheathed on roof and side unused automobile license tags, a set able garage, seventeen feet square a1 feet high, with space for two cars ha built in Denver, Colo. The tags wet tained from a surplus of 22,000 left in the office of the secretary ol More than 10,000 of the plates, wl rust-proof, were required to cover! Automobile License-Tag Garage as It Look Covering Numbers with Coat of Paint structure. They were laid overlappi shingles upon a rough board siding laver of tar paper. A paint applied to obliterate the numbers coat oft

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POPULAR MECHANICS Roused from a Delicious Sun Bath, a Young Red Fox Was Snapped just before He Scurried into the Underbrush By Autumn These Ten-Day- Famed for His Weather Pr: Old Barn Owls Will Have ecies, Young Mr. G Learned Their Weird Cries Detects a Ray of Si —- Sleepy Young Barn Swallows Wi!! Soon Be Off in Graceful Flight

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920 POPULAR MECHANICS GLIDER BOAT SKIMS ON WATER, ICE OR Finishing Flat-Bottomed Glider that Designed to skim over the surtace of the water or across ice or seagoing 1 ae } glider, h an airplat and propeller, is being tested. ventor has planned the craft police al snow, a equipped wit le engine The it an aid to d government officials in chasing l- as CIGAR WRAPPER RUN BY MOTOR EXCEEDS HAND OUTPUT Cleverly adjusted parts of a machine run by an electric motor took the place of the nimble fingers of cigar makers at a tobacco exposition recently and turned out shapely ‘smokes, neatly and accurately wrapped, Operator at Electric Wravner: Cigars Ready for Their Cc vers Rack at Left May Aid Battleships and Coast Police lawbreakers and as a torpedo carrie battleships. Six of the boats, he dec! €ach with space for four torpedo tub: The boat thirty-two feet long, has a seven-foot be and runs in shallow water. can be kept on one warship. by the thousands. A fast hand worker « complete, on the average, about 300 cig a day. The skill of these workers is su that they are able to produce a much m« satisfactory cigar than many power devic: which have been tried. Experiments being conducted constantly, however get apparatus that will have as great as the human hand. TEMPLE OF THE GOLDEN CALF UNEARTHED BY EXPLORERS near Ur of the Chald have uncovered Nebuchadnezzar’s tem] which 1s believed to be identical with Temple ot the Golden Calf mentioned the Old Testament. The Bible stor the temple relates how three Israe brothers, refusing to worship the gol image of a calf, were thrown into a fie furnace, but emerged unharmed. Ar the ruins are drain pipes which are belie by authorities to have been used to « ott blood ot , eolden image. Excavations living sacrifices before

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POPULAR MECHANICS WEAK SPOTS IN EARTH’S CRUST CLUE TO FUTURE QUAKES ik spots in the crust of the earth are aces where earthquakes are most to occur, according to Prof. Warren ith, of the University of Oregon. traits of Messina between Sicily and the region of Java and the Philip- the Chilean coast, the San Andreas California and a section of the est part of the Pacific near the great rora deep, he assérts, are typical juake “fields” where shocks may be ted. Unstable strata in these regions tfected by changes in the earth’s crust vy terrific ocean pressures. East of Philippines, he says, a submerged tain range is slowly rising out of the nd some day will form a new festoon ands parallel to Japan. KEYLESS LOCK FITTED ON DOOR FOILS BURGLAR’S “JIMMY” 'o prevent doors being unlocked from outside by inserting a “jimmy,” knife ther instrument, a safety shield has been invented. It is attached on the inside of the door by means of a bracket resting on the jamb. By turning a_ screw, the shield, slipped between the lock and the catch, is fitted securely about and the bracket is fast tothe wood. The guard can be hed in a moment's time, and, carried e pocket when a person is traveling, it be used to afford extra protection in guarded by locks. ] not secure! JEL TABLETS BURN IN WATER GIVING INTENSE HEAT chemical substance vill burn even under water have been n the market in Germany. Although ibout the size of a watch, they are to be capable of giving heat energy alent to over 5,000° Fahrenheit in econds. The bricks are especially ted to heating flatirons, foot warmers, ing irons and to boiling water. They be lighted only by a special kind of h and are safe from ignition or ex- 1 it kept dry. TICKS OL a the keeper 21 INDICATOR ON FILM PROJECTOR SAVES MOVIE DELAYS To warn motion-picture machine oper- ators when the film is near the end so that a new reel may be prepared without delay, BALL- BEARING ROLLER Film Indicator Connected to Buzzer; Mounted on Projector Magazine and to show how many feet of the film have been run, an indicator has been in- vented that is attached to the magazine of the projector. An arrow on a dial gives warning, and an electrical contact is made to sound a buzzer. ADJUSTABLE ERASER IN CLAMP LASTS AS LONG AS PENCIL Fitted within an adjustable clamp socket at the end of the pencil, an that can be pulled out as it becomes v down and will thus last as long as the lead Eraser and Adjustab’e C’amp Holder Fitted into Socket at End of Pencil has been designed. The clamp is re: easily and, after taking another “bite™® the rubber, is slipped back in place

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922 POPULAR MECHANICS Royal Doll House Rivals Palace of King Weta bcshenananr all the luxurious con- veniences and decorations found in the most modern palace of royalty, a doll house to be presented to the queen of England has been designed and ornamented by the most prominent architects and artists of that country. Intended as a monument to show future generations what the present type of elaborate home is like, the minia- ture palace stands five feet high and is only eight and a half feet long. So that the entire interior can be revealed, the outside walls are made to be lifted off like a box cover, permitting inspection of the tiny rooms and their ornate furnishings. The front of the little building is formed resemble that of Buckingham Palace, ie residence of the royal family, and a toy rd hich can be slid into the base of he “grounds” at the 1 mav be seen the Provided with Miniature Toilet Articles This Tiny B \ room Even Has Running Water Parage inl most expensive types of automobiles, also. wrought walnut furniture. Every folds up and may be pushed into the base that can be found in the most e ment. Small walks that resemble strips of | homes has been put in its proper pl ribbon, but made of costly material, cross these rooms. Toothbrushes not mot the garden and are bordered by imitations three-quafters of an inch long may be of manv kinds of flowers and trees. Even hanging in their accustomed positio a ring of tiny toadstools, an eighth of an the bathrooms, which are equipped inch high, seem to grow from the artificial replicas of those in the large man earth. Wiuthin are gorgeous dining rooms, The nursery, painted by a leading library, bedrooms and bathrooms. Sleep- has every toy a child could need, inclu ing quarters are furnished with delicate tin soldiers as small as mosquitoes silk draperies, costly little rugs and finely trains and scooters. Storerooms and cellars occupy parts of the ment and have minute bottle real liquors and boxes and c provisions. The strong room tains tiny crowns and scepter with small genuine jewels. traits created by prominent ters of the brush hang on the and the ceilings are studded brilliant electric fixtures that like the original articles. [1 bookcases may be®een a sele of miniature volumes, patt after larger sets written by lar authors. Elegant table chairs less than three inche made by expert craftsme finely paneled walls grace t! tire inside of the house. A « table, laid with a perfect ser Imitations of Luxurious Decorations and Paintings Orna- silver and china, seems to menting the ‘“‘King’s Bedroom” in the Royal Doll House teast from the kitchen.

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w the Royal Doll ace Looks When the falls Are Raised to it Inspection; the arage Containing Min- ure Models of Expen- ve Automobiles ay Be Drawn Out of the Basement ee NE —— ————— ww POPULAR MECHANICS Insert: As th oy Mansion Appears When “Closed Up”; Its Outer Surfaces Are Made of Tiny Blocks of Real Stone and h Walks and Garden alls Are Carefully the finest

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G24 POPULAR STREET-CAR SIGNBOARD AIDS SAFETY-FIRST CAMPAIGN In a recefit drive for safety on the streets of Jacksonville, Fla., citizens were im- pressed with the importance of taking pre- Jacksonville Traction Company’s Street-Car Crusader Covered with Signs for Safety-First Campaign cautions in driving their automobiles and in getting on and off street cars by a “sign car” run daily throughout the city by the MECHANICS Jacksonville Traction company. the car were covered with huge war signs printed with legends appealing rectly to the citizen to do his part in tecting life and limb. Guided throug! busiest sections of the city and in midst of crowded traffic, the car silent but eloquent argument in behal| the cause of safety first. Side MOOSE CAPTURED WITH LASSO When the heavy snows cover the nort woods the moose, like many others ot deer family, choose some sheltered locat where there is plenty of browse, and as t snows deepen they make a maze of beaten paths in order to reach their fo Since they are easily exhausted by plu ing through the drifts, the animals se! leave the paths unless compelled by fail of the food supply or attack by an ene: At this time the hunter carefully proaches the “yard,” as the shelter wit! connecting paths is called, and often is to come close enough to lasso one of t! Once the noose tightens around his nm the makes a break for fre: often dragging his captor miles in a di perate attempt to get away but in the « always giving up from exhaustion. moose AUTO DISPENSES MUSIC FROM AUTOMATIC PLAYER Fitted into a specially designed automo- bile, a self-playing musical instrument with a tone somewhat like an air calliope, has attracted attention in the west. Played with a keyboard, by hand or with an ordi- nary piano-player roll, it furnished music that could be heard nearly a mile. The device occupies floor space of only twenty- four by thir- ty-oneinches in the auto- mobile, which has sleeping quarters built in it. CLUNE BOY THEATRE [HE LAND OF WHISPERING HOPE — pis et a Luxurious Touring Car Fitted with Musical Instrument that Can Be Heard Nearly a Mile

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POPULAR WASTEFUL POTATO TOPS [ELD VALUABLE DYE ONC sidered a nuisance, the problem with the tens of thousands of oO tops 1s believed to have beet Danish chemist’s discovery te may be utilized as dye. In he dye, the tops are cut when flower. After withering for the vegetable is bruised and veen huge rollers so as to ex- ce. In using “potato yellow to be dyed are steeped in the everal hours, after which time a nd permanent yellow color is hem. If desired, the yellow may 1 to a beautiful green merely ng the garments in a bath of blue hey are thoroughly impregnated e \"\ QUESTION SHOP” GIVES ANSWER TO ANY TELEPHONED QUERY to answer any reasonable ques- honed to its office, a firm deal- lerwood & Underwood f “Question Shop” Replying by Telephone to zling Query from Distant Subscriber general information is said to have business in New York City. Sub s to the service are permitted to put queries to the “question shop” as esire. Each patron is given a code nd, it is reported, can receive aid e station at any hour of the day or It is also claimed that eighty per the queries do not require more ) minutes for an answer. generated by the submerged grain ot the steamer “Hivos,” sunk by a ine in 1916, off the coast of Algeria, e vessel to the surface. When the pressure was removed, the D i vessel MECHANICS 925 SEA’S HIDDEN PERILS REVEALED BY WIRE-CABLE DRAG Hidden and “needle rocks that jut up from the floor of the sea reets, bowlders, Model of Sea Drag Used to Locate Hidden Obstructions that Imperil Ships and threaten the safety of vessels, are be ing located with a wire dragged above the ocean bottom by specially built ships of the United States coast and geo detic survey. Lowered from twenty to sixty feet below the surface, the line is supported between two crait by floats When it strikes an obstacle, an alarm sig nal water notifies the attendants The position of the obstruction is ascer cable above tained and recorded for transfer to chart GUARD FOR AUTO ACCELERATOR TO PREVENT ACCIDENTS For automobile driver from stepping on the accelerator when ap plying the brakes, a guard, for patent has been asked, has an arm that extends over the “gas” pedal. The exten sion is free to move upward to allow the motorist to remove his foot from the a celerator, but a spring forces it back into preventing an which a Guard for Automobile Acceleratcr that Prevents the Driver from Accidentally “Stepping on the Gas’ safety position again. It is claimed the device is of aid to nervous drivers and to those operating cars in crowded streets.

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POPULAR MECHANICS EE WAN SE - ee SANE OER ol RT . citentinetaie ' ° an wi Li i eer Digging a Road into the 4 b a Left: Having (¢ Face of a Steep and ba’ - Wide Shelt f Slippery Cliff, where — . - Rock, Pneumat Steel and Powder First ’ * a — Tools Gave W Gnawed a Narrow Niche 4 : m ‘~~ . Steam Shovel W in the Stone Wall to s a * Power Was Cor Make a Platform for the a - ee It by Pipelines Crews to Work Unsup- aS rag against the Side ported by Ropes : Budding Hi Ca 2 perme eo a adal SRE RRS Courtesy The Exp!

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POPULAR MECHANICS JAY IS HEWN FROM CLIFF HEDGE TRIMMER LIKE MOWER H POWDER AND STEEL along the steep cliff, had to be lowered with ropes Powder and niche on a California r explosives. narrow could work. This was wid hovel that completed the forms a wonderful ed outa now or motorists. EXPLORERS SEEK PIRATE GOLD IN DEPTHS OF RIVER pe of retrieving a chest of gold e been hidden in the Sheepscot Kidd, notorious buc- he seventeenth century, an ex- ibout to be launched by Lewis- \ grappling device invented ber of the party will be used in - ; According to the was present when the p riding in the river was with an old attached to he flukes Before it could be aboard, however, it fell off and the river bottom. The explor- that the chest was Cap- ls, and it is on that assumption taking up the quest over 200 years Captain a sloop chest 14 beheve 1 pirate sailed the seas. KNIFE TO CUT MAIL WRAPPERS WILL NOT INJURE CONTENTS tough, paper mailing wrappers the contents, a knife point has been invented. ned tip of the tool is flattened for damaging eae ] irved 1 Flat, Curved Point that Opens Tough Mail- Wrappers of Magazines and Newspapers ertion under the paper. A _ for- vement of the instrument is said in a clean slitting of the cover. tensil, it is claimed, is cut twine and cord es of mail are fastened. being which also with and evenly, a tured mowing CUTS AWAY GROWTHS For cutting fresh hedge growths quickly | trimmer is being manutac which works like the blades of a mac complete Using Hand Hedge Trimmer that Works Like Toothed Blades of a Mowing Machine movement ot and closing the opening handles, two rows of sharp steel teeth pet form a clipping motion as they rapidly pass each other. The device is said to do many times the work of ordinary tools 1n one op ‘ration and to balance pertectly while be and lopping old made ig used For pruning erowth, a similar utensil is notched teeth, which may be em ployed as a trimmer. Adjusting are provided to tighten or loosen the parts with also screws BLOOD POISONING IS TREATED BY INJECTIONS OF DRUGS Injections of a combination of drugs prepared by staff physi lans attached to a department of the Johns Hopkins hospital, are said to have proved successtul in the treatment of blood poisoning The ret edy was prepared after five years of experi mentation and consists of two drugs com paratively new to medical science. It has deadly effect, it is said, on the organisms that cause the poisoning when injected into the veins of the sufferer

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928 POPULAR MECHANICS SPEED-REDUCTION GEAR RATIO serves as a means to turn the slowe; NINETY THOUSAND TO ONE shaft. Reduction as great as 90.0) lutions a minute down to one ha Using toothless gears for ordinary speed complished by allowing the ring 1 ratios, a unique power-transmission unit and cutting teeth on it to mes! has been designed for tasks where speed re- outer ring which, in turn, is gear: driven shaft. The gearing is bei: to hoisting machines, conveyors factories and packing plants, and vating mechanism used as part ment for electric steel furnaces. TOOTHBRUSH HANDLES CARVED INTO ATTRACTIVE TRINKETS Carved from disused toothbru dies, many attractive trinkets prepared for sale by an English who has devised a way to cut th: at a profit. The design is trace material and the article nearly co before it is severed from the hand| knives and files are the principal to A watch fob can be made in ab: hours, but several days are req pieces of more intricate design Power Transmission Unit for Speed , ara ce DESK CLAMP FOR TYPEWRITER 90,000 Revolutions a Minute Down to One REQUIRES NO SCREWS duction of a ratio less than ten to one 'o anchor port- =—— is required. To attain these low ratios, 4 ble typewriters three rollers, one of them larger than the tghtly to the other two, are fixed within a stationary edge of a desk ina ring, the inner surface of which forms a Convenient writing track, as they are revolved by a rotating Position, a clamp shaft inserted between them. A frame has been invented. binding the small pair of wheels together NO screws are needed to attach it, and it does not mar either the furniture or the typewriter. SILVER HIDDEN IN SEA WAV! COATS HULLS OF WRECK: Millions of tons of silver art solution in the waters of the s¢ estimate places the amount at one every 1,450 gallons, which means from 50,000 times as much as taken from the mines of the eart! discovery of America to 1902. | is found in comparatively large pr‘ in seaweeds and the hulls of ship impregnated with it. Examinatio sheathing of a vessel that had be: ing for some time off the Pacific South America showed that it co more than a pound of silver for ev: Toothless Gear for Ordinary Velocities where Tasks f ohee afnas he Require Reductions of Less than Ten to One of the sheathing.

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Theory of Radio Is Advanced pinion of Carl Ptfanstiehl, a Chi » engineer, the wave theory of soon be exploded completely, radiant-energy theory take its <plaining radio phenomena. Mr is of the opinion that there is thing as “ether” as commonly re He says that what are usually as radio waves are undoubtedly maller than an electron that are ng by an electric current. These it is assumed, bump into each transmitting energy which is as sound in the receiver. When of radiant particles e antenna, it sets up a very weak hich is transformed into sound energy or es in the receiving set levelopment of this theory, Says tiehl, has been very rapid and and further investigation of the these particles may explain the sm of direct communication and between minds. Also, through principle, wireless transmission of may become an accomplished fact. Compact Phone Plug Has Quick Release ] nd compact in appearance, a new ug has the further advantage that | tips may be attached or detached instantly. The body of the plug is circular and has two small project- ing metal tongues which lock the cord tips. To in- sert the tip it is only necessary to push them into the holes in the body ; to detach, the metal tongues essed toward each other and the tips out The sleeve and one of the ire marked with a + sign, to show hey are electrically connected. In certain headsets it is important to his, as the B-battery positive should nected to the proper phone lead.

Broadcast Station Built in Church Aimee Semple McPherson, the famous woman evangelist, has recently completed the installation of a pow erful broadcasting station in Angelus Temple, Los Angeles, ie Se Famous Woman Evangelist Broadcasting Her First Sermon from Church Station and will broadcast her sermons as the music from the church. Radio antenna masts towering above the church structure afford a rather novel sight now, but in a few years this will be common, so rapid is the march of radio Eliminating Jacks in Receiving Sets When tuning in stations most people use the amplifiers from the start, turning the filaments down low while using the phones and turning them up while using the loud speaker. Therefore, the use of a separate jack for the detector and first-stage ampli fier is often unnecessary and a useless ex pense. Besides this, the use of more jacks adds to the complication of the construction and requires much more soldering than if only one jack were used —A. C. Cole, Chicago, Ill. two or

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The Dentist’s Chair Has Lost Its Terrors for This Little Chap, Who Forgets the Ache of His Tooth When He Clamps on the Head Phones 4 Real Radio van: the et Is Tuned by Open- Parisi ; ing and Closing the Leaf Radio Pretrnee Whtis ; Coils Strolling along the Boule- © Keystone View Co vards, by Using the Um- On n brella Set De vised by a Paris Inventor It Is Not Nec« for the Dyed Wool R a d 1¢ I Pass Up a Fa Program to Induls a Canter. This Y Lady Must Have Ride Every M but She Carri Radio Set wit! and Combines S with Entertair Fighters Now Skip Rope. 3ox and Punch the Bag to Carried on Radio Waves, in t cade Gymnasium, Chicago, W Many Champions Have Been T Our Photo Shows, from Left to |! Stanley Zbyszko, Jack Malone, | Welsh, Howard Carr and Conn € rie, as They Apveared During ‘ of the Radio Workouts

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hone Transmitting Appa- that Will Minimize the f Underground Work. Requires neither Aerial nor nd and Uses Only Small Dry Men Working in Mines Carry It with hem and municate with the Surface e Latest apo! a Radio Set, | ho iding Lamp and nograph Com- ed. The Phonograph Is Cleverly cealed in the Base of the Lamp, When the Doors Are Closed, ere Is Nothing to Indicate the sual Character of the Lamp; the lio Set Is Mounted in the Same Compartment Fair Fishers Enter- tain Themselves Bites Are Right, Radio Built in Lobster Claw With His Own Little Radio Set, the Stage Door Man Can Fol- low the Performance for the First Time

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POPULAR Sixteen-Tube Set Serves Restaurant Patrons Warren H. Keates, of Philadelphia, is the proud possessor of a real radio set, which he perfected and built himself. he set has 16 tubes, and has a receiving range of 7,000 miles. Getting such stations Diners at This Restaurant Are Entertained by a 16-Tube Radio Set as 2LO, London; 2ZY, Manchester; the Eiffel Tower, Paris; Brussels, or even Rio de Janiero, Brazil, is a common occurrence with this set. It is used to entertain diners at Radio Tearoom in Philadelphia. the Coupler Permits Greater Selectivity Requiring no adjustment, and permit- ting the coupling of the antenna to the receiver without causing signals, broadening of an instrument is now available which, it is said, largely does away with the need of switches, taps, etc., while permitting selectivity in tuning practically any unit using a coupler, except one tube reflex rhe antenna circuit is tuned to reso nance with any partic- and the coupling of the signal to the receiver is only sufficient to excite the receiver at the wave length to which it is tuned, without adding the resistance of the antenna circuit to the secondary circuit, which always causes a broadening and loss of signals. greater vario sets. never ular incoming The in- MECHANICS strument also makes trap when used with condenser, and, when so used. it adds to the strength of the incomi nals. Used in an absorbing circuit vents re-radiation from sets that o an excellent a 23-plate High-Power Station for Australia Direct radio communication Australia and America or Great will be established with the complet a station to be erected shortly, at of approximately $2,000,000. The mitting equipment will have a powe least 1,000 kw., and will be instal duplicate. The aerial system will ported by twenty lattice masts 80 ft The receiving apparatus is to co five sets of high-speed commercial! ments, capable of receiving message five different countries simultaneou necessary, while the transmitter is messages to any of them. The ma tion, which will be either at Melbour Sydney, will transmit messages to i cities by means of smaller trans Tester Shows Correct Capacity It is grid often found necessary to condensers after a set is bu cause the one o1 ly used is not correct capacity a new “finde: proper capacity found very consists of eas! five densers, ranging pacity from .000 .0008 mf. connect a permanent base with binding p The five cond: give a total vat 31 different c values, and by combinations, it may rea determined just what value is best particular hookup. CAPAC rry 00005 \ arious instrum oO anv radio experi rhe prove of value t @ Amateur builders should carefully up the wiring after it has been cor by marking off each wire with red the plan, while tracing it from term terminal in the set. This eliminat: danger of burning out tubes accid

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Neutrodyne Set POPULAR MECHANICS Built in a Console By F. L. BRITTIN radio amateurs would to assemble the five-tube ne receiver in a console, tate on account of the f the panel in the usual ent of this type. The com- t or drawer space in the about 18 in. d the neutrodyne panel, as console is our February issue, 1924, wide. This difficulty can rcome by condensing the ment of the instruments, new layout must be very carefully red, so as not to lessen the effi- of the instrument. There is no that the console cabinet adds to the and appearance of the re- ind, besides, it allows the storage batteries to be placed out of sight in ly of the console, where they can arm to rugs or fine floors. console receiver shown in the illus- ence Completed Instrument in Use, with Door of Receiver Compart- ment Open trations is the one built for the editor of this magazine, and has proved very efficient in operation. It will be noted that the upper half of one compartment contains the instrument itself; in the space below this the B-batteries are placed, while the left-hand compartment holds the charger and 6-volt storage battery. A double-pole, double-throw switch is screwed to the side of the storage-battery compartment, and is used to throw the storage bat- tery either to the receiver or to the charger. Another switch, which can either be of the knife type shown in the drawing or of the snap and plug-and-socket type, mounted beside the first, for con necting the charger to the a.c. supply. The author has found the tungar type of battery charger to be best for this purpose, as it is noiseless—an item of receiver of It is a good idea to place the storage battery in a glass or hard-rubber tray, so that any age that may take place may be detected before the cabinet 1s in Also, the charger should be practically importance in a this type. 1 ‘ iCal jured. placed on a thick felt pad, to sorb all vibrations, lengthen the lite of the bulb The B-batteries are nected as shown in the circu the lead wires through holes drilledinthe|] instrument “am, and of the drawet proper bind ng posts Phe S are mounted on a strip of | nent Closed, Showing Neat and Finished Appearance; Inset, Close-Up of Both Compartments at the rear of the instrun drawer, as shown in the toy

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POPULAR MECHANICS receiver assembly. All outside ch as the aerial, ground, etc., are in through the back of 935 is mounted on two small fiber blocks at the back of the drawer. Small holes are bored ole and concealed from The panel template is to the right of the circuit this panel is 18 by 7 by ick, but, as all consoles ke, only the general ar- ent of the instruments is on the template. The vill have no trouble in lay- ; panel, however, as tem- the correct angles shed with the neutroform- e panel is set far enough he cabinet so that when partment door is closed it ir the control knobs. The part of the compartment finished with a grill, or panel to match the wood- ving § the console, as access to partment is necessary long intervals. The cir- gram is a rearrangement of that in the February number, and is with the instruments spread apart the wiring clear. All wires a ust be kept as short as possible, for sults, while following the diagram Tinned-copper “bus-bar” wire be used, covered with varnished- tubing where necessary, and the run in straight lines, with square, turns, made with a pair of pliers. eral directions given in the Febru cle should be followed, but instead ting the binding posts at the front panel, they are fastened to the “« 7-in. strip before mentioned, which ics (TO A-B BAT. POSTS (ON RECEIVER oo SWITCH. TUNGAR } CHARGER™ a 6-VOLT STORAGE BATTERY ~’ ent of Battery and Charger in Left-Hand Compartment, with Wiring and Switches Top View of Instrument Drawer, Illustrating the Arrangement of the Tubes, Neutroformers and Transformers below the posts for the leads from the aerial, ground and batteries If no drawers are provided in the con sole, the panel may be mounted on a base board of the proper and supporting strips glued and screwed to the sides of the cabinet so that the instrument may be re moved at will. The loud speaker placed on top of the console, as shown in the illustrations; this was thought better than trying to incorporate it into the cabi net and thus crowding out the storage terv and I look as well exposed as the Details for neutralizing the ins were given in the March, 1924 the circuit is unchanged in its these directions may be followed t out. The mi iteria ls required for the ‘inst ment are the - tl ceiver Rae as in the March numbers size, Was neither of whi | loud charger, exact! Same as Finishing Radio Panels Panels on radio cabi usually have highly polished surface but it is times desirable to have a dull satin instead. Such a surface ma by sanding the panel down No. 0000 sandpaper, attacl padded with a terial. rhe and the felt should be rubbe tion After the gloss moved the panel shoul oily l nets some finis] piece ot | 1 2 | Dioct S about : ad be rag, and it will then h: satin finish.

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POPULAR MECHANICS Set Has Parts of Solid Gold wall, while that at the right is mou a stand to be set on a table or des! many radio fans can boast of such antenna is designed especially for an elaborate set as A. F. Hearl and V. S._ gersoll circuit. Both types have t Vaughan of Chicago The front panel, ing plates, one for wave-length cont -s and top are made of heavy plate’ the other to hold the grid just b point of oscillation. <A _ picture placed inside the frame, thus addir attractiveness of a room, instead tracting from it as the ordinary antenna does. Opera Singer Puzzles Radio Fans With close to five thousand ra teners eagerly straining their ear cover her identity, a star from the Civic Opera company recently sa W JAZ, the Edgewater Beach Hotel st in Chicago, announced only as “M All the Working Parts in This Set Are Made of X. . P a ! Solid Gold “Whois Madame X? Guess an a telegram,’ requested the announ in itself, is not entirely novel, the star had sung “Annie Lauri« ‘ally interesting part about the Last Rose of Summer,” and final fact that the sockets, switches, Nome.” Did the fans respond? T! plates—in fact, all the working From north, south, east and west ire made of solid gold. away as Portland, Oregon—came t!] . telegraph oper the operation ol the set considerably, cramps in their fingers, and the sta eliminating a lot of the internal resistance, ejals lost count: 4.700 had bee: 1 as well as reducing interference effects,

It is claimed that the gold parts improve’ grams, until the when the official teller finally quit Tennessee woman wired heard Galli-Curci in finer voice.” And 46 per cent of the guessers the country guessed correctly. T! was Florence Macbeth and that there is no danger of corrosion One This may all be very true, but most radio fans will still have to be content with solid- brass nickelplated parts in their sets. Novel Ind Ant ? crannies vom Cleaning Crystals with Alcohol Constructed to resemble a picture, a novel indoor antenna has the combined 7° features of attractiveness and portability, to a great excent the receiving rang: and is unlike the loop aerial in that it i set. Some cry stals are much bette: others in this respect, but even goo are soon spoiled by improper care causes the surface of the crystal to « gradually, which of course decrea efficiency. Dust particles in the a lodge on the surface and adhere to it most trouble is, however, caused b dling the crystal, as the oil onthe hand fingers, which is imperceptible to the : eye, insulates the surface ofthecrysta for this reason crystals should ne\ touched. An excellent method of cl crystals, which will in many cases Two Types of a New Indoor Antenna that Resembles the original sensitiveness, sc re» allen a bath in alcohol, using an old toot! to scrub them. It is much better to ' non-directional. The larger one, shown at crystal inclosed in glass as it is better the left in the photograph, is about 16 by tected and will remain sensitive 30 in. and is designed to be hung on the longer than one exposed. The sensitivengss of a crystal dete:

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POPULAR MECHANICS Blind Spots in Radio \lystify Science \WV {AT is the mysterious force that akes certain spots on the earth’s e apparently impervious to radio es? Although about fifty of these gaps have been charted in North ca, and its coastwise waters, no one und the cause forthe “blind” pockets. i the largest dead gaps is just south on bay in Canada; another is over - off Atlantic ‘ ity, while . third ~ Mine in Mohave Desert to which Radio Is Denied by ed to be in the vicinity of Camden, “Dead” Spot Neither does Mexico offer an en- ininterrupted path to the wireless borhood of the Santa Barbara islands. Six for somewhere south of that coun- charted areas in which radio signals can- ipital a blind spot has been found in not be received exist in the state of Cali- and further north, on the border fornia, and it is even difficult at times to get is, there is a gap that defies passage anything through to the bottom of Yosem- vireless. ite valley. Although radio messages can on the Pacific coast, three more of _ be received all around these spots and be uble stretches are known to lie; one yond them, the waves appear to collapse as gon, another near the entrance to soon as they enter the limits of the blind rancisco bay, and one in the neigh-_ sections. In spite of the fact that other territories with exactly the same climate and land formations can be easily reached by ordinary roads, the dead areas cannot be penetrated even with sending sets placed close to their boundaries. These blind spots have been found almost entirely by accident Some of them have been located by parties of hikers and campers who, having small receivin: with them for their entertain suddenly found that tl get nothing from any could raise no sound of from the air. However, by m ing over the ground, testing out their sets from time to time, they were able learn the extent of the dead areas, several of which are approximately fifty s: miles in extent juaTe Believing that the peculiar cor s in Western Mountains Located Radio ‘Blind’ Spots When ee te : “ I : Their Receiving Sets Failed to Work dition might affect only receiving

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POPULAR MECHANICS OREGON Yosemite Valley Where Unknown Forces Make Difficult the Sending and Receiving of Wireless apparatus, experimenters tested the sec tions for sending as well, only to learn that even where almost ideal conditions existed, their signals could get through only with great difficulty. Fortunately for ocean traffic these gaps do not occur as frequently at sea as they do on land, where the waves seem to strike some impassable force and fade out much as a ripple of water vanishes when it strikes a rock or other solid obstacle. Experts have found that radio signals which may be heard for hundreds of miles on all sides of these spots fail to cause the most power- ful receivers to record a murmur when they are set within the limits of the “blind.” Investigations being carried on by radio organizations, government officials and scientists are resulting in the charting and mapping of the dead spots and, it is be lieved, the near future will disclose the mysterious causes responsible for the trouble. Two of the most dangerous dead areas at sea, under study by scientists, are believed to lie in mid-ocean, one on each side of the equator. Into these “holes” experts of both the United States and the British governments are systematically pouring a steady stream of radio waves from all directions. It is thought that some of the unsolved disappearances of ships equipped with radio apparatus may be due to their presence in these “hidden” waters @GRANTS PASS P 4 ° LOS ANGEL Es Uy, C v Syne ent? Map Showing Approximate Positions of Ca *‘Dead” Gaps through which Radio Will No when disaster overtook them. Of sc _ _ N Z - lif 1 t | \T theories advanced to explain the st: conditions almost all have been test found groundless. One not yet thor: ( ul tried is said to be that some form of en: in the air, not known to science, ex these places, and when vibrating same rate as the radio waves it causes the annihilation of both force this proves true, some form of tre: for these areas will be necessary té them free for the passage of the w In view of the fact that radio sent at night can be made to travel al e it J ire tv

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POPULAR MECHANICS as far as those sent during the thought by some that excessive be the cause of the dead spots, ire to be held over the territories re dawn when temperatures are west. Mineral deposits will be in mountainous districts to de- f they have any effect on the pas- the wave, for it has been pointed the flow of wireless passes most over plains and wide valleys. One ost troublesome spots, however, is omparatively smooth floor of the southeastern California, and an- over the low hills on the eastern San Francisco bay. ooner do certain conditions appear ue of all these dead spots, than an- found which does not offer me conditions of difficulty and con- to none of those previously discov- (he radio-restricted areas all seem e little in common, except that they carry the waves across the trouble spots in northern California eavily forested territory, and it has | that such growths offer an ob- to radio because the leaves and of the large trees absorb the en- m the ether. Many radio experts accept this as a fact, however. For me it was held that failure of radio o “arrive” th ne is | iwo ; was due to slow absorp- e energy, but this has been proved hence it cannot assist the searchers hunt for the mysterious power tops messages in certain districts » the ordinary observer, look exactly iles of other territory that permits travel to the fleeting flow of the radio. Tube Socket Has Spring Clip d rubber is the material employed in struction of a tube socket that is to have several advantages in its favor. One of its fea- tures is a spring clip mounted on the side, which holds the tube firmly in position with out having to twist it against the push of strong base springs Such action, it is said frequently has a tend to weaken the base, permitting air e and the early ruin of the tube be is quickly released by springing e clip with the thumb or forefinger. er good feature is a side mounting which enables the builder to mount tube on the panel if he desires. non Radio in Milady’s Vanity Case A number of designers have built receiv- ing sets in cigar boxes, safety-razor cases, matchboxes and what not, but now we have a really practical set built in a vanity Left, Vanity-Case Set Open, Showing Single Control; Right, Case Closed case. The complete set, including phone, aerial and ground, is contained in the case, which measures 7 by 4 by 4 inches, and is covered with leather. ‘The parts are ar- ranged with a view not only to compact- ness, but also to efficiency, and the instru ment is well made and finished, the case being velvet-lined. This set may be used at home, in the office, in a hotel, in an auto, in fact anywhere, as no outside wires of any kind are used. Preventing Aerial from Rolling One of the most common troubles expe rienced with multi-conductor aerials is that the spreader turns and the making it necessary to climb up on the to disentangle again \ effective around in a windstorm wires cross, root! them and method of preventing this trouble is to suspend a weight, } } 1 14 \\ ' l simple may be a heavy elbow, from each spreader as shown in the illustration Che weight is tied to the ‘ pipe PIPE ELL d the ends of the rope fastened ( he e1 5 the | reader shown M. E. Duggan, Kenosha, W center oO! a rope an @In many cases silent tubes are due perfect contact between the prong tube and the spring terminals This trouble can readily bending the latter up a trifle to insure a good connection. of the soc] be eliminated by

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POPULAR Reading a Typewritten Message Sent by an Aeroplane Many Miles Away in the Clouds Drilling Two-Color Panels The two-color panel stock that is now on the market owes its resemblance to pol- ished mahogany to a thin layer of veneer about in. thick, which is pressed into the material when it is made. Certain pre cautions are required in drilling these pan els, as the veneer is brittle, and therefore cracks very easily, and cracks that would otherwise be almost invisible are made very ¢ the veneer is A simple method of reduc ing the danger of splitting the veneer is to drill the holes from the front and not from the back, using a sharp bit to do the work, and laying the panel down so that it is sol- idly supported. onspicuous because light in color. Phone Block Connects Six Headsets \ particularly neat and efficient con nector is now available for hooking up a number of headsets at once. The “phone block” is mounted on a hard-rubber panel, band SW) ! A Neat and Efficient Phone Connector that Takes Up to Six Headsets set on a mahogany-finish base. It is equipped with combination jack binding posts, thus making connection easy. A sliding bar, passing over special contact MECHANICS Radio Typewriter Success on Planes Typewriting in a_ plane among the clouds, with a controlled machine dup! the message in a ground miles away, is a new devel announced by the Navy D ment. The new system giv craft a means of communi considerably in advance of telegraph and telephones use, and “teletype.” has been name @The Danish Folkething agreed to advance the mone essary for the erection radio stations in Greenla: plates, throws any number of phon: to six into the active circuit. There wiring in the block, and no danger ot circuits occurring between cord tip Grid Leak Has Flexible Ribbon Element \ rather novel variable grid leal las some distinct common type, has The varying ele ment is a flexible ribbon, which is fed between two metal rollers by turning the knob in the usual way. The resisting ma- terial is spread on the ribbon in a pennant shape, the strip being narrow at the free end of the ribbon, and constantly becom- ing wider toward | advantages ove! made its appeal the other end. The ribbon is of fiber, impervious to moisture, and the resist material, it is said, will not rub off, the varying the conductivity. The ac smooth throughout its range and positive leak control at all points. @ When a tube turns bluish it is a wa to the user of too much plate voltage the B-battery. The remedy is to r¢ the plate voltage immediately.

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_ POPULAR MECHANICS EARTH-BORING MACHINE CUTS LABOR COSTS eers, contractors and telegraph hone line chiefs have been able the confined spaces met in city work. It is claimed that the machine will dig holes in any ground ex- cept solid rock, and that two or three men with it can dig more holes and set more poles in a day than 60 men can do by hand. The bor- ing machine is driven from the truck transmis- sion through special gearing, which is under the complete control ofthe truck driver. Three speeds and reverse are obtainable through the regular trans- mission, and the speed is con- trolled by the accelerator just Upper Left, Digging at Rear of Truck; Below, Digging a Hole as the speed of with Tower Swung over Side of Truck the truck is ids, ditches and fields where tele- ind telegraph lines must be in- [n addition to this, the short turn- lius of the truck (25 ft. 3 in.) enables ichine to go easily into and out of EXHAUST-GAS ANALYZER CHECKS CARBURETORS ther simple device, evolved by the bureau of mines, is now available for ng the exhaust gases from internal- stion engines. It provides a ready | of setting or adjusting a carbu- on a really scientific basis; only a few tes are required to make a test and pparatus can be used by anyone. e more completely the mixture in an il-combustion engine is burned, the ‘the efficiency. The exhaust gas is up of a mixture of various gases, in- ng carbon dioxide. When the mix- s well burned, the carbon-dioxide nt 1s relatively high and it is lower e combustion is less complete and ency drops. measuring the carbon-dioxide con- governed. The winch for hoisting and setting the poles is also power-driven, and the whole tower may be swung in a wide arc around the truck. The machine can also be used for pulling poles. tent in the exhaust gas, it is readily deter- mined just how well the mixture is being burned. This is what the analyzer does After the test is made, the mixture may be enriched or made leaner until the propor- tion of carbon dioxide is correct. VISE HAS ALL-STEEL SLIDE It is said that broken slides account for the scrapping of 90 per cent of all vises thrown out of service. A vise with an all steel slide, which is now available, should appeal to all vise purchasers, therefore Several other refinements are incorpor ated in the design of the vise. For in stance, the square-thread screw is retained by a cap in front of the sliding jaw, thus eliminating the necessity of coring the in- side of the vise for a collar. The nut, which is of ample length, is replaceable.

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942 POPULAR MOTOR-DRIVEN TOOL HONES AUTO CYLINDERS The “honing” of automobile cylinders to correct the uneven wear caused by the ea friction of the rings and the angular thrust of the con- necting rods is now a well- known _ proc- ess, although of compara- tively recent origin. In small shops, however, the tools available for the work have usually been driven by a hand electric drill, and the feed- ing of the hone up and down in the cylinders has been accom- plished by hand—a tiresome process. Now, a motor-driven tool has been developed that may be clamped on the cylinder head, and, when once set, need not be touched until the cylinder is finished. The hone is simply set in the cylinder, a pair of collars set to reverse the travel of the hone at the points desired, and the motor started. The hone centers the machine above the bore, and is automatically fed back and forth at the proper speed without further attention. This is a very useful machine for re- sizing cylinders, and for fitting oversize pistons. It may also be used for producing the final polish after boring, reaming, or grinding the cylinders. 1S SAFETY BLOW-OFF VALVE In many power plants two or more boil- ers may be connected to one common line 7 Safety Doub!le-Flap Blow-Off Valve; the Cone-Shaped Section Is Designed to Fit Directly in a Sewer Manhole for blow-off purposes, and where this is practiced extensively carelessness on the MECHANICS part of operators may result in th: scalding of a man working in a: boiler. The blow-off usually take little time, and there is an inclina: the part of the boiler attendant to valve and then to plan to go back it when the blow-off is completed. valve is left open inadvertently, ther: danger of injury to a worker if th: off valve be opened on the othe: To prevent this, a Chicago man cently brought out a double-seate: valve. A vertical pin hinges the \ flap valve between two 4-in. pipes ing the blow-down from adjacent | The valve is seated so that it blocks t trance to one boiler of the pair, a outcoming steam or any back pr: building up serves to hold it fast i: When one wing is open to allow the down to pass, the other wing automat closes the entrance to the other boil: there is no chance for the steam to get the boiler and injure a man who ma repairing or cleaning it. TOOLS REPAIR CORK-INSERT CLUTCH DISKS Worn-out cork-insert clutch disks be repaired in a minimum of time pair of tools lately developed, thu Tools for Re-Corking and Trimming Worn-Ou Insert Clutch Disks only saving the customer money, but ing a great deal of time in the service tion and reducing the amount of sto« necessary to Carry. With the new tools, a man can re and trim a set of eight disks in less t! hour, leaving the disks just as good @An electric motor has recently built that runs at the very high spe 10,000 r.p.m. The output is 25 hp., a1 unit is designed for a 300-volt d.c. c Operation is reported to have been satisfactory.

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POPULAR MECHANICS SCRAPER WORKS SURFACE BACK AND FORTH scraper that is claimed proof, that will not de- crown even when an inexperienced man, ce 30 miles in a day and ‘rated by one man, ts the of an lowa engineer. me carries three scrap- mounted at a wide each other so that the el is worked back and i. distance of 42 feet, and | thus thoroughly pul- This permits the road pack down hard. road CARPENTERS’ HANDSAW HAS SQUARE ATTACHMENT provement on the carpenters’ saw itly increases its usefulness has le by an eastern inventor. It con- an ent nverts ntoa \ U- metal is fitted e blade se to the lle, and upturned ges that the short i the square, the device being set ac- tely at right angles to the back of the hlade. The back may thus be used e long arm of the carpenters’ square ed, to mark across boards, etc. The e makes it possible for the workman minate one tool from his kit, which tself is a great convenience. PROTECTING ALUMINUM IN CLEANING BATH practice employed in railroad and maintenance shops, of cleaning dirty in a boiling soda or potash solution es difficulties in the automobile in- because the solutions dissolve num and its alloys. The use of m silicate (water glass) to prevent is been the subject of experiments in Germany. It was found that the tion of % per cent of water glass to oda solution either reduced greatly tirely eliminated the solvent action. Road Scraper that Works Material Back and Forth Across Road- way for a Length of 42 Feet A protective coating obtained by dip- ping the article in a boiling soda solution containing water glass was also found et- fective in a cold soda solution. It is recommended, therefore, that the alumi- num parts of an automobile be protected from the action of solvents by filling the cooling system, for the first time, with a weak soda solution containing a small per- centage of water glass instead of with pure water. HOLE CENTERS TRANSFERRED BY PUNCH Intended for sheet-steel and plate work, a new punch greatly facilitates the work of transferring hole cen- ters from a template or from one sheet to an- other. The body of the tool has a wide conical center drilled length- wise to take a_ prick punch. The body is supported by three legs to keep it vertical on the template or plate. In use, the conical nose is simply set in the hole in the template, thus automatically center- ing the tool, and the upper end of the prick punch is tapped with a hammer; this makes the center mark on the lower plate or sheet. The prick punch is kept up by means of a spring contained in the body, so that it returns in readiness for the next hole after every hammer tap

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944 GAUGE CHECKS CYLINDERS, An instrument that indicates conven- iently and accurately the size and concen- tricity of a cylinder throughout its entire length has recently been placed on the Left, Gauge in Place in Cylinder, Showing Method of Use; Right, Gauge with Centering Attachment market. It is made in two models, one for those who have a variety of models to test and one for those having occasion to meas- ure only cylinders of a standard size. The gauge fingers project from a casing mounted on the bottom of a tube, through which runs the rod that actuates the dial hand. By pushing down a button on the dial sleeve, the fingers are drawn in sufh- ciently to enable them to be placed within the cylinder. Releasing the pressure on the button permits the fingers to press against the cylinder wall. The fingers, before insertion in the cyl- inder, are set to a master gauge, while the dial is turned until the hand registers zero. The gauge is then used in somewhat the same manner as an inside micrometer. One model is fitted with an attachment that holds it central in the cylinder, to fa- cilitate inspection for variation in diameter. GROUND TAPS EFFECT ECONOMY All distorting effects, such as warped teeth, bent taps, etc., caused by the hard- ening, are overcome in a new line of taps by grinding the shanks and thread forms after hardening. The taps are made of high-speed steel only, and as they can be carried to full high-speed hardening heat without trou- bling about fused points or edges, since POPULAR MECHANICS hese are corrected in grinding, + said to give better results in sery unground taps. Ground taps run | true holder, cut to accurate size, a: threads of accurate lead, thus ma ting of properly made screws unn¢ in assembly. y are HOT SWAGING REDUCES COST OF AXLE SHAFTS Stronger live rear-axle shafts, duced cost, are produced by mea: swaging, according to R. A. De\ a paper read before a recent meet the Society of Automotive Engine: conclusion was that, of the four methods of roughing live-axle sh swaging is much cheaper than iorging under steam hammers, or t Practically no stock is wasted original bar is 8 in. shorter and % ir in diameter than the finished axle, a: about % in. is sheared off the sma The physical properties of the steel proved about 15 per cent. MACHINE MARKS PARTS RAPIDLY A new type of marking machine stamping sizes, trade-marks or oth: signs upon bushings or other similar drical work has recently been brought It is simple and positive in action, ha versing ciproc parts w ork continu: in one tion fro: feed chut the ma die; the: is throw automat to a rece placed t ceive it stamp 1 adjusté make t! pressio or hea\ set it for ous siz‘ work. With the dial feed supplied up to 1%-in. diameter may be mark« by substituting another dial the ca may be increased. Pieces may be n at the rate of 6,000 to 7,500 per hou:

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All Shop Notes published in 1923, in book form—Fifty Cents—from our Book Department A Drinking Fountain for Small Stock By L. R. BUTCHER well-known fact that swine make installed, the fountain requires no atten- gvains and are much healthier if tion save an occasional cleaning. Ii de- iter is available at all times. How- __ sired, it is as readily attached to a stock me farmers dislike to buy the tank or a supply barrel of watering devices necessary to The box for the fountain consists of two ne in each feed lot. This should parts: a drinking compartment and a float farmer from using them, for, in ents or on rainy days, he can ‘ing devices that serve every well as the manufactured hey can be made in the farm little cost completed fountain, as shown in istrations, is connected directly to watering system. er and float ar- ent allows the de- te he any of or- pres- Once a way SAS Sn >. “ in a a Automatic Fountains for Small Stock May Easily Be Made by the Farmer at Home, and Will Quickly Repay Him for the Time Spent; Insert, Arrangement of Float 945

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chamber. Water flows from the float chamber to the drinking compartment through small holes drilled through the partition. These holes should be about 2 in. above the bottom of the box. Located in this manner, little dirt or trash will find its way from the drinking compartment into the float chamber. The detail draw- ing gives all general dimensions necessary to make the box: the sides are of 2-in. ma- terial, and all other parts of l-in. stock. The cover is held in place by two buttons—one at each end—such as are used to fasten window screens in place. The float and lever arrange- ment is shown in the insert. A bracket is fas- tened to the in- side of the float compartment and form Sa IX 8X9" END BOARD \ he _/ ” 7 ¢ a LUMBER“, ‘ ‘ ‘ 2° LUMBER” jet 946 POPULAR MECHANICS \" LUMBER can be screwed into the wood. A f\ coat of white lead will keep the jo’ leaking. The float shown in the graph is attached almost direct], lever, but a better arrangement \ to connect the two with a short cha water level of the fountain may t by changed by changing the float lev: adjustment may be made for any « level. tail dray quire hb explat G a ] Va metal of course. be used fo e float; scr sheet may be | large enoug The bra: k et cut from a she and bent shape be drilling. Be ing can be cold, alt! the work \ easier — pivot point for metal is heat: the lever. One sr SSS The float end of the lever carries the float, while the bent end presses against the leather valve placed over the end of the supply pipe. As the float rises, the leather is pressed against the end of the pipe, cutting off the water supply until the water level is lowered. The supply pipe should project through the end of the box about %e in., providing a firm seat for the valve. One-eighth-inch pipe has a large enough opening for the supply, and if the hole for the pipe is bored slightly smaller than the outside diameter of the pipe, the threaded end of the pipe oe 14 “§xS'FLOAT LEVER Details and Dimensions of the Automatic Fountain, Showing the Inlet Valve and Float Mechanism } SOLDERED ~ is made if FLOAT @ by strap Heat wi necess make the at the pivot point. The quarter-tur made by clamping the piece in the vis« bending with a heavy pair of tong heavy cotter pin or a stove bolt serv« pivot. One caution should be obs in installing the fountain—it. must b« tened firmly in place. If this is not « the swine will shove and lift the fou until leaky joints develop. If very pigs are to drink from the device, it | to cover part of the compartment as Mirrors Useful in Garage Small mirrors have been found very use- ful in an automobile repair shop when re- pairing cars. They are used for reflecting light into such places as the differential. The mirrors can also be used for reflecting light upward when working behind the instrument board. Handles should be pro- vided on the mirrors so that they can be inserted in narrow places. Melting Metal for Alloys In making alloys first melt the met the highest fusing point, and when ' melted, drop in the other metal, br into chunks. Cover the surface 0! molten metal with salt or other flu with charcoal, in order to prevent © tion. The metals should be stirred with an iron or graphite rod before pou from the crucible. of \%-in et : 7 2 7

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= ing Long, Slender Work in Lathe Supp‘ efficient method of supporting ork required to be turned down in shown in the drawing. When work of this description, if the is small, a center in the end is uch value unless a number of very s are taken, as the work will spring away from the - —_]} tool when near » —CHUCK the center. r When a num- ih ber of such TAILSTOCK pieces require to be turned, get a piece of stock large enough to give it strength. Turn one end » tailstock spindle and bore out to eter of the stock to be turned. A next cut the length of the bore. should be just wide enough to e tool at the bottom and allow for ipe of chips at the top. In this the work is well supported out its length and can be finished cut. Heating Water with Steam many shops no provision is made for vater for toilet purposes, although buildings are heated with steam. In such cases, a steam line is often run to a point near the sink, and a hose run from the end of the pipe into the water. This heats the water quickly enough when the steam is turned on, but accompanied by an annoying noise, he steam is apt to burn a careless \ much neater arrangement is in the photo. Here the steam line nected to the water pipe before the ‘enters the sink, and is fitted with a e valve to control the steam pressure. hen the valve is opened full the steam ts the water to the boiling point. It lvisable in an arrangement of this kind, urse, to have the water turned on be- opening the steam valve, especially n the steam pressure is low. POPULAR MECHANICS 947 Vacuum Cleaner Furnishes Torch Blast For soldering jobs that require higher temperatures than usual and for light Hot Brazing Flame Produced by Using Ordinary Gas and Compressed Air from Vacuum Cleaner brazing work, a mixture of forced air and ordinary cooking gas may be used to pro duce the desired heat. A compressor was thought to be too expensive in one case, and therefore the method of providing air by means of an old vacuum cleaner, as shown in the drawing, was resorted to and found satisfactory. A small hole was cut in the dust bag and a %-in. pipe nipple inserted, with washers and nuts on both sides to hold it in place. A length of gas tubing connected the nipple and the braz- ing nozzle, which was also connected to the gas outlet on the wall. The heat of the flame was varied by properly regulating the air and gas supplies. With some cleaners, an attachment can be had that locks on the outlet of the fan in place of the bag. If an attachment of this kind can be obtained, and the air hose attached to it instead of to the bag, a much neater and better job will result. Patching Auto Tops When patching auto tops it is a good plan to place a board across the top bows under the covering to provide a firm sur face on which to work. After the patch is applied a weight should be placed on it and left until the cement is dry, so that the patch will not curl up at the edges.

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MECHANICAL POWERS By CARL W. MITMAN Curator DIVISIONS OF MINERAL AND MECHANICAL TECHNOLOGY UNITED STATES NATIONAL MUSEUM Copyrighted, H. H Windsor This is the fourth article of a series by Curator Mitman, explaining in simple language what every man who builds or designs a machine must know, and showing in detail how to build a set of models of the mechanical powers that will exactly duplicate the set just in the National Museum at Washington, D.C. The first articles of the series appeared in the March, April, and May issues, and the next will appear in the July number. Part IV—Gravity: N° consideration of mechanics would be complete were it to avoid a dis- cussion of that prevalent natural force, gravity. This unseen attractive force ex- ists between the earth and all other bodies and is endeavoring constantly to pull them downward to the earth. The measure of this pull is called weight. For instance, it is commonly stated that a man weighs 150 pounds, which simply means that he is be- ing drawn to the earth by a force equal to that which pulls down- ward i150 standard 1-lb. weights. This pull is greatest at or near the earth’s sur face, but de- creases with increasing depth beneath the surface, and also with increasing altitude above the surface. Furthermore, it varies for different localities upon the earth’s sur- face, depending upon the distance of each place above or below the equator. This is due to the fact that the diameter of the earth through the north and south poles is 26 miles shorter than the diameter through the equator, in other words, the earth is not a perfect sphere. Gravity pulls all bodies toward the earth’s center, but as each body is made up of many particles, each of which has weight, the gravity of that body acts in the direction of lines (as many as there are particles composing the body) converging and meeting at the earth’s center. The 948 Revolving Levers length of these lines, however, in | tion to the dimensions of the bod great that they are always assume: parallel. Furthermore, by one fundamental laws of mechanics, the allel-acting forces can be compound: a single force equal to the sum weights of the particles composi: body, and whatever may be its p: there is always one point in the through which this single force will this point is called the center of g It is the point at which the weight body is concentrated and thus may fined as that point about which a b: balance in any position. The impo:tance of taking into « eration the center of gravity in the and construction of every machine or structure has resulted in making a\ many formulas and directions for the center of gravity ‘of lines, areas and solids, and the reader is referred to this literature for the solu- tion of spe- cific problems. The term revolving lever is not one of com- mon usage to describe any particulartype of machine but is the selection of the writer as a! for a class of mechanical powers ¥ operate on the principle of the whe«

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POPULAR MECHANICS it which are quite distinct in ap- from the commonly accepted he distinctive feature of the so- evolving lever is the axle, which, {f being elongated as in the several windlasses, is short and, in fact, like the hub of the wheel than else. As an aid to raising heavy rope is usually attached to the load e hub or axle and power is applied vheel through another rope which a groove in the wheel. By apply- power to the wheel through a rope an directly to the wheel a wider positions for the applied force is For instance, if manual power applied through a rope or chain at to the wheel, the pull may be di- downward, upward or horizontally, any convenient distance from the e. The principle involved is, of one of the lever arms, and as in levers, three classes or orders of ng levers are recognized, depend- ing upon the relative posi- tions of the fulcrum, ap- plied force and resisting force. As in the case of the wheel and axle, the cen- ter of the re- volving lever corresponds to the fulcrum, the wheel to the long arm and the hub or axle to the short arm of mple lever. A revolving lever of the rder is shown in Fig. 1, reproduced a model. The applied force acts vard, as does the resisting force, but o forces are on opposite sides of the im. The mechanical advantage ed in this machine is the same as in a echt lever of the same order with the | advantage that the action is con- us. By reversing the direction of ng of the rope on the wheel, the ap- force will be in an upward direction, own in Fig. 2. By this arrangement, ever, the action becomes that of a d-order lever, having both applied resisting forces on the same side of the rum but with the same mechanical ad- tage. Still another arrangement that be made is that shown in Fig. 3, illus- ing a revolving lever of the third order. i } | «| Bary 949 More power is required to raise a given load than with the first or second-order forms, but if speed of raising the load is of first importance, this arrangement will bring about the desired result. In all the various types of lever actions discussed so Model of Revolving-Lever Train far in this series, the principle of moments has been considered, and it is undoubtedly realized that the relative lengths of the two arms of each lever influence the work which can be done. So, in the case of revolving levers, their efficiency can be augmented b) diminishing the diameter of the hub or by increasing the diameter of the wheel. But the amount of increase in efficiency of single machine is limited, for, if a ver great power is required, either the hub would become too small to support the weight or the wheel would have to be made inconveniently large. For a case such a this a combination of revolving levers ma be used, resulting in a system of machines which corresponds to the compound lever and which is governed by the same law A system such as this is illustrated Fig. 4. The pull exerted on the first wheel transmits its effect to the axle or hub of that wheel, this acts by friction on the second wheel, which transfers the effect to the second hub, and so on, until the original applied force transmitted through the series in this order arrives at the last hub where the resisting force is encour tered. According to the principle of moments, the ap plied force in this machine multiplied by the continued product of the radii of all the wheels, is equal to the resisting force multiplied by the continued product of the radii of the hubs. In actual practice com- pound revolving levers are extensively used

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950 POPULAR but not exactly with the transmission form described above. Instead, for some pur- both the wheels and hubs are and for others they are connected When so arranged, called a train; a a imparts motion is driver and which motion, a driven wheel. toothed-wheel ar- is met with, calcu- to si of wheels vy applied force, etc. ‘d by using the number heels, since these are proport ircumference and also the radii of ls, and the principle of moments is us: The appli ied force multi ipli ied bv the product of the number of teeth of | heels, is equal to the resisting force by the product of the number in all the hubs or pinions discussion of the single revolving . the fact was brought out that with rder of lever speed could be obtained power and with another or reat loads could moved with ill force. Similarly trains employed either to do work poses, toothed, by belts. 1S ~} one ie 51Ze of teeth ional 1 cl a are with be wheel heavy - 6" DIAM., 2 THIck / J pesistine FORCE) BASE 13, TOP, ‘3 SIDES, \5 3HIGH ARROW. PEReE? - ORCE) iy ~ }ONG, 5 im tHick ~ Ewipe- ACROSS BARBS -3'Diam., 327 2 THIck Pen ee —_ <A ” BASE, X45 X10 \ ‘s=--- PILLAR, 8X 2) 45 AT WIDEST END 5X e Fis. ss Left, ight, Working Drawing of little force or to produce great speed with considerable force. In the first case, the available force is applied to the first wheel of the series and is transmitted in the man- ner described earlier in connection with MECHANICS Fig. In the second case, this ar: ment reversed; the available applied or exerts itself on the hub or of the first wheel and thus produ rapid revolution of t wheel. Cranes all ki hoisting material work by a wheel trai: first kind, and the whe ot a watch the second arrangement For a model lever of the materials are 1S ot is an e@xXal of 1 first following required fase, 10-in ’ Pill it Round | Weight 1% Arrow (appl wide acro base the p and face the on top. Construct ve shoulders 1% in. from the Narrow the upright shaft to 1 Turn from the blank (using a concentric double pulleys, with \ of %-in. thickness and 6 and 3-in eters, drilling in the center for screw. Attach by the pivot screw Square bey el conca ARROW, | (APPLIED FORCE 4 _4 THICK, {WIDE ACROSS 8 zS8Q. SHAFT 6 DIAM.,2 THICK, & WEIGHT| RESISTING FORCE) BASE,1?, TOP, if-SIDE, IS HIGH =‘, WIDEST END Details a the Construction of a Model ‘of a Revolving Lever of the First Order, with all Dimensi Model of Second-Order Lever top of the pillar. Secure one end piece of cord, about 6 ft. long, to groove of the 6-in. pulley, winding the clockwise about the rim and permit! the free end to swing from the right

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POPULAR MECHANICS ‘tach the arrow by inserting the . hole drilled in it. Attach the end ce of cord, about 3 ft. long, to the of the smaller pulley, and wind in terclockwise direction about the en fasten the free end to the screw- | as a handle for the weight. At- ; assembly to the base by fastening tom of the pillar to the center of e of the base by screws from be- Finish as desired. the revolving-lever model, second use the following materials: in. x 4%-in. x S'44-m. x M-mn., 4% lank, 6-in. diameter, 1%-in. thick (resisting force), base 1%4-in. top n. square, side 1%-in. high. applied force), 1%-in. long, %-in. thick, wide across barbs, 4-in. square shaft. ¥%-in in. at widest end. square, re and face the base with a finish ntop. Fashion the pillar with con- oulders 1% in. from the bottom, ving the upright shaft to 14% in. wide. rom the blank (using faceplate) con- double pulleys of 6 and 3-in. diam- vith %-in. rims and V-grooves, drill- the center for a pivot screw. At- y pivot screw to top of pillar. Secure end of a cord, about 6 ft. long, to the e of the large pulley, winding in a ise direction, and allowing the end to | upward from left side and securing e end the arrow, by means of a hole in the shaft. Attach to the groove e 3-in. pulley one end of a cord, about ong, winding in a counterclockwise tion, and fasten the screweye used as ndle for the weight to the free end. this assembly to the base and fas- the pillar to the center of one side of se with screws from beneath. Fin- desired, the model of the revolving lever of ird order, the following material is red: 10-in. x 4™%-in. x %-in. 8'%4-in. x 4-in., 4%-in. at widest end. | blank, 6-in. diameter, 14%4-in. thic ght (resisting force), base 1%-in 1%-in. square, side 1%4-in. high. w (applied force), 1%-in. long, %4-in. thick, “%- wide across barbs, %4-in. square shaft. square, top uare and face the base with a finish on top. Shape the pillar with con- shoulders 1% in. from bottom, nar- ig the upright shaft to 1% in. wide. from the blank concentric double evs of 6 and 3-in. diameters, with %- ms, V-grooves, and pivot hole in cen- Attach by the pivot screw to the top e upright shaft. Attach one end of about 6 ft. long, to the groove of the pulley, winding the cord in a clock- direction, and attach the weight by screweye used as a handle to free end. 951 Secure one end of a cord, about 3 ft. long, to the groove of the small pulley, winding in a counterclockwise direction, and per- mitting the end to extend upward; then fasten the arrow by a hole drilled in the shaft. Attach this assembly to the base by screwing the pillar to the center and one side of the base. Finish as desired ARROW APPLIED FORCE), IF LONG 4 THICK, WIDE ACROSS BARBS, 7SO.SHAFT ~-———— 6"DIAM, 2 THICK \ { WEIGHT (RESISTING FORCE) BASE,13,TOP, 1} SIDES, 13 HIGH ? s'biam,, 2 THICK - PILLAR, 852, 45° AT WIDEST END and Weight as Compared with Figs. 5 and 6 For the compound revolving - lever model, the following material is used: Base, 12%-in. x 5-in. x 4-it Six uprights, 6-in. long, tapering from 1%-in end to 1-in. at the other, “%-in. thick. Blank, 6-in. diameter, 1%-in. thick Blank, 4-in. diameter, 1'4-in. thick Blank, 3¥%-in. diameter, 54-in. thick. Blank, 1'4-in. diameter, 34-in. thick. Two %-in. dowels, 2 in. long. \%4-m. dowel, 354-in. long. Six ¥-in. washers Cordage, 3 ft Old automobile inner tube Weight (resisting force), base 13 1'%4-in. square, side 1%-in. high Arrow (applied force), length 1'%4-in., “%-i '4-in. wide across barbs, shaft %-in. square at one Square and face the base with a finish bevel on top. Round the small ends of the uprights and drill a %-in. hole, with its center 2 in. from the top and sides. Turn from the 6-in. blank two concentric double pulleys, with diameters 6 and 3 in., and rims 4% in. Turn in the larger pulley rim a square-shouldered groove, % in. deep and 4 in. wide. Drill a %4-in. hole in the center of the pulleys. Turn from the 4-in. blank two concentric pulleys with diam- eters 4 and 2% in., and rims % in. wide, with square grooves %s2 in. deep. Drill a ¥%-in. hole in the center of the pulleys. Turn from the 3%-in. blank a pulley 3 in. in diameter, with a square-shouldered

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952 groove *32 in. deep and % in. wide. Drill in. hole in the center of the pulley. urn from the 1%-in. blank a pulley 1% in diameter with a square-shouldered deep and in. wide. Drill in the center of the pulley. e inner nt Into ‘ TY? 4 In. hole SseyV- strips 2 in. using a LONG (2 arp knife 6'DIAM., 2 THICK-., ’ straight \ . Glue sufh eth grooves ‘ 3 DIAM. BTHICK . ZB a ot 11) pulleys struct an iblv of the nd 2 “2 72-i1n eter pul- 2 ) pona + e ends e dowel fastened > oF t hts. Cen- this a bly cross- - of the cen i of the at a point in. from the ot the base, 1 ne = . _ BASE, |!27 X5 XZ ne securing it with glue and from beneath. Construct another lv of the 6 and 3-in. diameter pul placing this on the remaining 2™%-in. dowel and supporting the ends upon two of uprights. Fasten this assembly across the width of the base in a position that will permit contact between the 4 and 3-in. pulleys, with the smaller pulleys on one side, and secure to the base with glue and screws from beneath. Construct an assembly of the 3%-in. pulley upon the screws ; re assenil ley Ds the Figuring Water Required on a Farm \ certain quantity of water is required as the daily output of every water-supply system, whether it is pumped by wind or other power and a storage tank must be provided for holding the water until it is used, and for caring for the surplus. Ifa windmill is used to pump the water a tank large enough to hold a three-day supply of water should be provided in or- der to furnish water over a period when there is little or no wind. If engine-driven pumps are used the tanks need only be large enough to hold a single day’s sup- ply, as the engine can be operated at any 3 DIAM. \. 25 DIAMa \ © ; Model of Compound Revolving Lever: Hand Pulley Raises the Weight at the Right POPULAR MECHANICS 35g-in. dowel with the protruding running freely through the remaini: uprights, the pulley being glued ¢ dowel, and glue the 1%-in. pulley projecting end of the dowel in such tion that there wi --3 ARROW(APPLIED FORCE),LENGTH I; z THICK ' “ - WIDE ACROSS BARBS, SHAFT, 7 SQ. ' < 4 ' f i = Fic.8 al SS DIAM 5 7 4 DIAM., 3 THICK ‘ DIAM »Z THICK WEIGHT ! (RESISTING FORCE), BASE, 3”. ' . rh \Z TOP, 14 1 the 2 By if y ; — \ a ‘ . 6 UPRIGHTS, 6 LONG |, TAPERING FROM is TO I, 5 THICK Force Applied to the Left- © lbe lin. of dowel hy the inne face and race nearest uy secure sembly base HICK A At I width in positior the 3 ley w ont l ey al Js smal will b same the ot] 11 puliey with SCTeEWS neath an e@! piece Ol about | ft to the pulley. the cord clockwise, and fasten the the weight. screweye used a as ft. long, to the largest pulley, windi on the drum in counterclockwise direct and gluin or dS the end in a lengthwise in the shaft of the arrow washers are used as bearing tween the pulleys and upright as desired. Part V of this series of article be published next month. time he purposes regardless amount f rom of of weather water required { isolated water plants, is, on the average, as follows: all household and toilet purposes all gal. for each member of the family; 10 gal. for each horse, 10 gal. for each 1 2 gal. for each hog, and 1 gal. for sheep. Applying the rule, the min ] allowance for a family of five perso: household purposes only will be 125 lons. obtained should be elevated at all the least cocks at storage 10 ft. h- ] ’ handle to Fasten an end of cord, al hole al cond t ) In order that ample pressure wi 1 lis than the highest tap and the highe tank the greater will be the pressure

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he blade line. POPULAR MECHANICS Meat Grinder Fills Bottles dinary motor-driven meat grinder size from which the cutting disks een removed, is used in a plant cturing preserved-fruit products, g bottles with relish and similar s. No other change has been made grinder, save the provision of a spout at the outlet to fit the mouth ottle snugly. The relish is fed into of the grinder and the screw at the forces the product out through the nd into the bottles about as fast as er can be placed in position and re- by the operators. Formerly this as done by hand, each worker filling over a little wooden bowl. Twelve rs were then required to accomplish rk now done by four using the nes.—Orin Crooker, Elgin, IIl. A Poppet- Valve Gauge alve tester similar to the one shown e drawing provides a set standard that form a part of the garage tool ment for setting the machine in ng up a set of valves or a valve-re- seating tool. Whenever both -— the valve face and “VALVE ~—s the valve seat are machined to the same angle, only a small amount of 1 grinding in will be [| required to obtain a perfect seating. The tester should be accurately made /\ from two pieces of / J machine steel END VIEW OF V-BLOCK ~ —— HARDENED- TEE AB - STEEL BLADE SLOT ~+ pinned together. The blade should be hardened and ately ground so that a line parallel the V-block forms a 45° angle with Most valves are ground to ngle of 45°, but a 60° tester can ide along the same lines. To test a place the stem in the V-groove and it down until the face touches the light showing between the valve and edge of the blade will show the tions, ifany. The valve-reseating tool ted in the same manner.—Geo. Alex- Pittsburgh, Pa. ) close the sides of a used cotter pin, one of its legs on the edge of a vise tap the head with a hammer. Homemade Pneumatic Punch The illustration shows how a very useful pneumatic punch for the shop where com- pressed air is available can be made at little expense. The size or strength of the ma- terial used in its construction will, of Pneumatic Punch Made in a Railroad Shop for Piercing Quarter-Inch Plate course, vary with the thickness of the material to be punched. Plate steel up to ¥44-in. thick can be punched very effectively with the one in the photo; the cylinder is 10 by 12 in., and is operated at a pressure of 50 lb. per sq. in. This machine was built only as an experiment, and there- fore looks rather rough, but it is perfectly satisfactory in operation—A. H. Keys, Baltimore, Md. Increasing Capacity of Lumber Wagon When a wagon box is removed so that a load of lumber can be carried the lumber is usually piled to a width equal to that of the wagon box. However, it is possible to increase the size of the load considerably by laying crossp ieces over it when it reaches the height of the wheels, so that the wheels will have plenty of clearance, and then continu- ing to pile the load on top of the cross- pieces, as shown in the illustration. Cross- pieces up to 8 ft. in length can be used, as this is the maximum width of a vehicle allowed on public roads. The size of the load can be more than doubled in this way.

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POPULAR MECHANICS Emergency Wheel Puller ing the wheel from a semi-floating s sometimes a very difficult task, es- lly atter some strong-armed mechanic and Sledge Hammer s sent the retaining nut home with a 24- in. wrench. However, the work can easily be done by two men with a short length of chain and a sledge hammer. The bar is placed with the flat end rest- ing on the axle, and the handle held toward the rear, close to the tire. The chain its strapped tightly around the bar and two or three spokes, these, of course, being pro- tected by wrapping a piece of burlap around them. The bar is then pulled out- ward at the end by one man, while the other strikes the bar with the sledge ham- mer squarely over the axle; this will usu- ally start the wheel immediately. In stub- born cases it may be necessary to lengthen the bar with a piece of pipe on the end. crow b Fe Welding-Rod Holders Every acetylene welder who does heavy work on large preheated jobs knows how disagreeable the work is when ordinary short welding rods are 3. sven. used. As a makeshift, ROD lengths of short rod are often welded to- gether, but this is not entirely satisfactory because the workman cannot then hold the end of the rod on the weld so steadily. In order to overcome this trouble: welding -rod holders oft the kind shown in the illustration have been made in one shop and found entirely satisfactory. They are made from lengths of round steel rod and short lengths of tubing having a %e-in. wall, the tubi; ing welded to the end of the rod. eit! line with it or at an angle to it as indi one type of holder will be found for one class of work, the other for of another kind.—Edwin Kilburn. S Valley, Minn. Pouring Lead into Holes in Concrete Occasionally it is necessary 1 melted lead or babbitt into holes into damp concrete floors for the pu of holding lag screws or leveling chine. When the hot metal is pours the holes it usually “flies” and nu: particles spatter up against the This trouble is due to the dampness concrete; when the hot metal tou steam is formed and the pressure steam blows the metal away. An « lent remedy is to pour a little kerose1 the floor and into the hole. The turns to a gas when the hot metal t it, and escapes gradually.—A. S. Jami Springfield, Mass. Lifting Tongs for I-Beams Ini shops where many I - beams handled on hoists or cranes it is custom to hold the beams by means of chain s but it takes considerable time and labor to attach these slings so that they will not slip. In one shop the work was greatly facilitated by the use of the tongs shown in the draw- ing. These could be at- tached and de- tached ina fraction of the time con- sumed in ad- justing the sling, and they were ju safe as the latter, as they were self-loc! They consist of two forged lifting |! having holes drilled at one end to s the pin of a heavy clevis, which is atta to the hoist, and having the other end over at right angles to grip the I-bea drop link holds both hooks on the be DROP-LINK

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POPULAR MECHANICS Making Wagon Beds Last iottom of a wagon bed is the first wear out and usually has to be re- vo or three times before the side- ind endgate are discarded. A good of preserving it is to cover it with of No. 20 sheet iron, 3 ft. wide and in. longer than the bottom. This screwed down with heavy round- rews so that about 3 in. project at The projecting portion is bent nd screwed to the underside. Such iron cover costs only a few dollars ell worth the investment. Portable Motor-Driven Saw ations such as sawing interior wood es, cutting out floor boards when ng steam or water pipes and electric t, as well as other work in awkward are greatly facilitated by the use of il id st hy _- 34g SHEET - METAL GUARD

: HAN DLE ==-6" CIRCULAR SAW a --ADJUSTABLE SAW STOP le Motor-Driven Saw which Can Be Made in the Home Workshop and Has Many Uses

rtable motor-driven saw that can be n the shop. nsists of a %-hp. electric motor of nd generally used for driving wash- machines, fitted with an extension on which a 6-in. circular saw is se- mounted. For the sake of safety, ird is cut out of a piece of sheet metal, to shape and fastened as shown. A is attached to the guard. It is slotted e bottom for the saw and at the ends \w depth adjustments by means of the ning bolts. A 6-in. length of brass <, with the end flared to permit its ment to the guard with small stove or rivets, is provided for use as a e and another similar handle is fitted e top so that the saw can be handled ease. Feet are provided on the motor, it it can be bolted down solidly to the bench whenever desired. A Gardener’s Basket Carrying baskets of garden truck from one end of the row to the other by hand is needless work when it can be made much easier by the use of a simple wheelbarrow

Large Homemade Wheelbarrow Which Is of Consid- erable Convenience to Truck Farmers of the type shown in the photo. The body resembles a ladder and is built of 2 by 4-in. wood. The crosspieces are cut from l-in. material, and the length of the body is determined by the space required by four bushel baskets set in a row, plus the additional length for the handles. The width of the body is also made to conform to the space required by the baskets. The crosspieces are spaced to provide openings for dirt to fall through, and also to reduce the weight. The wheel is mounted about 18 in. from the front end. The axle is held by means of four iron braces, which can easily be made of heavy tire iron. Wooden legs, braced securely, are provided near the handle to keep the top level. A Handy Hardy substitute for smith’s hardy held in the hole provided for it in the anvil, the hardy shown in the illustration As a the usual black-

has been found very useful. It is welded to a length of %- in. round or square iron rod, which is bent to fit over the top of the anvil and is hinged to the anvil block so that 3 cae Oe swung down and out of the way when not in use. When wanted for use, the blacksmith reaches down with his hammer and pulls it up.

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POPULAR Roller Protects Barn Corner Farm buildings sometimes are so ar- ranged that when hay is hoisted into the the team must be driven around a corner of one building in order to avoid barn nat Iron Pipe Arranged Vertically Along Corner of Building Protects It from Hoisting Rope another. This causes the rope to rub hard against the corner, not only wearing it out quickly but also bruising the corner. In one case injury to both corner and rope was prevented by arranging a steel roller vertically along the edge of the build- ing as shown. The roller consisted of a 4- ft. length of 2-in. iron pipe, turning on bolts fitted into the ends. The bolts were in turn held by short pieces of 2 by 4-in. wood, nailed securely to the barn. The roller has been in use for two or three years and has never failed in its purpose. Removing Auto-Spindle Bushings After a few months of continual service there is always more or less play in the steering-spindle bushings of automobiles, which can readily be detected by shaking front wheels. When these bushings are worn badly it is, of course, necessary to replace them, but it is sometimes a difficult task to remove the old bushings. In one case the spindle bolt was used as a punch in an attempt to drive out the bushing, but the latter could not be budged. Heating and thereby expanding the spindle boss in which the bushing is lo- cated the first solution a mechanic would naturally think of. This can be done by means of a blowtorch, but if a the is MECHANICS blowtorch is not handy an improvis: cohol torch, which consists of asbestos cloth rolled up and set cover of a large tin can, and saturate: alcohol, will serve the purpose just a The asbestos acts as a wick and the ing alcohol generates considerable Often the new bushings are too s1 the spindle boss, and fall out of them An excellent method of fitting th: snugly is to apply strips of solder to outside, lengthwise, and then tap the | ing into place. The excess ler readily scrape off while the bushing ing driven in.—J. E. Dekker, Chicag a sok A Belt-Shifter Lock A common trouble on standard cou shafts is that the belt shifter will : in position on either the tight or th: pulley. There are several methods oi coming this trouble, such as the sett the shifter lever and the use of s; clamp bolts, but the writer has not any of these as simple and practical lock shown.in the illustration. It co: of a link, attached to the end of the s! rod and to a ceiling joist as shown coil spring to hold the link in the posit indicated. That end of the link whi connected to the shipper rod is slotte that it will not bind when being move \ sHippeR STOP COLLARS -- SHIFTER Simple Lock that Keeps the Belt Shifter in Pos from one position to the other. One of the coil spring is attached direct] the point where the link pivots on th: and the other end is fastened to the just below its center. Two stop colla: fastened on the shipper rod at the indicated, to limit its travel in either tion.—W. Burr Bennett, Honesdale, | @ By soldering the holes in the corne: the top of the coil box of a Ford a water-tight dipper is formed that serve for filling the gasoline tank whe other receptacle is available.

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Making Wood Dowels By H. H. PARKER into the dowel hole, and as the wood is driven down through the plate, a groove will be formed lo make a dowel, h side 1 di ) and soft-wood dowels are used large extent both in pattern | woodworking, and d general mav be purchased ready to cut when none is available \ fairly the required ire times square, each u ye made by hand. be done by planing and sand corners, 1 m a square rod, but the best pointing one end through the plate wit! ‘pare a dowel plate of the type GROOVE SCREW es ooo | [ 6/6,6 000 DOWEL PLATE,! SQUARE CASE HARDENED | a DOWEL Pi DOWEL-PIN PLATE IN USE COMPLET WINGNUT BOLT-~ PLANE ---- Pir | STOCK PIN STOCK ~ ZE> 4 END VIEW \ “ADJUSTABLE. SIDE | STOP x BASE PLATE PLANING PIN STOCK ve, Dowel Plate, Rough and Finished Do yrooving r Planin ing: Below, Fixture f{« r roc ‘to use a dowel Oo ne side, to a trom the hole as Such a groove drilling and tapping a side of the plate for a the point projects ‘Te es a7 > ] a arise, as these matter le id paints 1g the darken the color of pointed setscrew

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958 POPULAR M Convenient Box for Nails and Screws The handy box illustrated is made up into as many compartments as desired, all but one being provided with an individual cover, when in use. This makes it pos- LOCK PIN y FINGER HOLE

SLIDING OVER

A Box of This Type Will Prove a Special Convenience to Patternmakers and Other Woodworkers contents in the artment in use. Also, the contents ot one compartment can be dumped out without emptying the whole box. The covers are pyramidal in shape, with a de- pression in the top for moving them con- veniently with the finger. In desired to carry the oa in a where it might be upset, are vided for all irtments; the extra 1s slipped on just before the box is packed, and all the covers are locked in place by dropping a nail into a hole drilled through one cover expose oniyv the com case it is chest, pro- } tool cove;rs e comp. one as in the side view Damming Irrigation Ditches fields : , : tes 1: 1 ditch temporarily in der to di- otten necessary in irrigating ‘into other di al sheet-iro about 1 ft. ditch and and then A stout piece leans of a1 The sheet iro: longer than the wid the about 1 ft. wider than depth, cut to a semicircular shape. 4-in. securely bolted alo1 the straight edge of the piece of dam. of 2 by wood + sheet iron. ‘This wood should be a couple of feet longer than the sheet iron so that the pro- jecting end used as a handle. A length of iron rod is bent to a U-shape and can be and the end of the box, ECHANICS fastened at the center of the 2 piece to facilitate pulling the sheet of the ditch. In use, the device down into the bed and sides so that it dams the water effectiv: can be put removed moments whenever necessary. ot tl in place or Wrench Made from Connecting R A usetul socket wrench can re; made trom an old drop-forged co: rod. The rod is cut off at the point cated and the end ground smooth. The bushing is removed from the other end and the eve heated until it is red-hot. A bolt head of the size for which the wrench is to be used is driven into one side of the eve while it is hot and the metal hammered down to fit against the flats. If desired, the other side can be treated to fit bolts of s1ze. -Sebastian V Beach, Fla. —< “#) t=. ~ larger o1 ierengel, We Round-Shank Drill Chuck for Bra The ordinary carpenter's brac« only square-shank drills, and it is 0 ally desirable to round-sl drills in can be adapter! ( use

show drawing the tool d ° take uy room in t sei kit, al dl SPECIAL ] TOOL- —_ round I turned one e1 1 } iP Hed tt my end to shank of then ed oO led across the body the lower part drilled for hank is squared and tapere yrace chuck. rhe drill to be usec adapter has a flat filed across the indicated, so that it will bear agai flat at the bottom of the slot in the

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POPULAR MECHANICS epairing Leaky Gasoline Tanks repairing leaky seams on gasoline he gasoline is, of course, out of the tank first iccidents. However, the and bottom rapidly, and forms fumes explode and cause considerable \s a precaution against such to fill the tank gasoline has been re vy the water to overflow, he residual gasoline. An- r preventing explosions that filled tanks ‘ always in order to the film of left on sides tes gas \ isable is to squirt a re extinguisher inside Shaft Holder for Light Babbitting ++ holders made like the are handy to use "ing work. Most re shops have to do kind of work at and the process of lining up, which is gen rally the longest ing part of the job, ca be shortened 3 ROD ~~~» SUPPORT SCREW \ + \ é; as t IGHT ENING SCREWS to a great ex- tent by means of shaft holders. In iaking holders particular only materi pieces - ROUND PIECE the 1 } snort ‘Ss to go OV’ rd and halt a sleeves are drille ‘es, two yn each screws be and them round sleeve between > preces ot » to each e1 rf tT rod, whic to blocks « laid on dhe 1 blocks holders on ry he yees and ends veel are plac adjuste by moving th raises or lowers the yroperly set both tighten ightened and the two sleeve support the work.— Montreal, Can. AT LOO! the thus easily 959 Boat Propeller Washes Tomatoes Canners large fairly these of tomatoes wash the fruit in tanks to remove dirt and mold \ rapid circulation is tanks necessary in , but it is rather difficult to at-

BOAT PR OPELLER FALSE BOTTOM

Motorboat Propeller Used to Wash Tomatoes. Bottom Protects the Fruit A False tain without brut necessarily. In one ordinary | pressed very contact placed at with covered peller drives th the tank, tion, which g¢ into the tomatoes erating |

cord coulk don >

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POPULAR MECHANICS Device Starts Boxes Along Roller Conveyor Wire-bound shipping boxes often get stuck on roller conveyors unless the drop of the conveyor is sufficient to overcome Endless Wire with Hook Located over Roller Track Gives Obstinate Boxes a New Start tendency. To a large gum-manufacturing has equipped the conveyors in its shipping de- partment with a device which the obstinate Start. The device consists of an endless wire suspended on grooved pulleys center of the 1] hook attached where the this trouble concern eliminate gives boxes a new ’ over the roller tracks, with an iron to the wire at the point two \ handle on one of the pulleys allows the operator to bring the hook to any point over the track; the back of the hook not catch the ox but readily passes over it. Then by reversing the direction of movement the hook catches behind the box and pulls it along. ends are joined. does A Planer Kink When called upon to plane a flat spot on a number of castings that were not pro- vided with a raised finishing pad, as is usual in such cases, I knew that the of a belt-driven pla stroke ner varied considerably, to belt slip- nd that the / j elf: BD gh/ * ‘- Pedy y__ fe STOCK _ ceeded as follows: ¥ croove [ marked off the pot to be finished, and chipped a groove, % in. deep and 3¢ in. wide, the width of the spot to be planed. | then clamped a piece of 1-in. square stock back of the groove, and bolted the job on the planer in the usual way. I set the table stroke with plenty of length, so that the uneven cuts do a first-cla [a therefore, «| stroke would go as far as the 1-i; piece each time. In case the str: long the tool simply lifted, as show on the forward stroke, settled groove.—A. F. Loeffler, Sheboyga Making Announcement Slides After trying several different met making announcement projection, | found the following slides neat, simple and economical: A unused black typewriter placed over a sheet of paper, is fed into the typewriter a ribbon key set to the position for ing. This allows the type to | coated side of the carbon paper and transfers some of the carbor white paper. When finished, the eff be seen clearly by holding th paper closely in front of an electri there will be a contrast of nearly black that will be still more distinct projected on the screen. The carb: is trimmed to fit the slides and is bou tween them in the usual way.— Shaw, Chattanooga, Tenn. carbor ; ordll ALi Increasing Capacity of Small V-Bloc! lo eliminate the necessity of around heavy V-blocks, a 1 vised the auxiliary pieces show1 photo so that a small pair of \ could be used on light work of much larger trz2an tte blocks Were intended for. The auxiliary V-blocks are made of flat- finished stock and they are heldtothe regular blocks by means oO! two pieces of round drilled in mechar AUXILIARY V -PIECE wtn 4 (i 4 AG steel, the PP center to clear ocK-- round -head LZ which thread into tapped holes in the ce the blocks. The auxiliary attached or removed in a moment light work they are just as handy blocks, and, of course, the differ bulk and weight makes them most de when they have to be carried arout tool kit from one job to another. screws, piece

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Making Hay Loading Easier By J. M. COLLINS \ device that reduces the work in attached to the windlass by means of ropes. d vest time is a boon to the farmer, When loading, the frame is first set at the it takes a little time to make. The rear of the rack, as shown at the lower ittachment shown in the illustra- left; when it has been loaded, it is drawn ich is used on the farm of Mr. J. E. to the front by means of the windlass, as Pataskala, Ohio, has been found shown at the lower right, and the rear venient when loading hay, and half of the rack loaded. This does away with a great deal of hard work. with the hard work of forking the hay to ice consists the forward part of the rack by hand, which, as anyone who y : has tried it knows, is sttened length- J z hard labor. the bed of tra halt-sec- ime, mounted eths of iro The hay on the rack being lar hayrack. thus separated into of the rack \\@ two bunches, is also

<7 |

Left, Frame Drawn to Rear Ready for Loading; Lower Right, Drawing the Frame Forward; Loading Rear Half of Rack simple windlass, also made of much id fittings The extra frame is when dt Auto Gearbox Used in Machine- machine té Tool Drive jack shaft transmissic ‘ansmission and speed-changing quently an automobile can be successfully special ‘ giving different speeds, including waste neshaft in a small shop he transmission device vn over a lathe, in such » handle was within con ne operator. With work I e machine, the operator could change o rub the end of a ls and reverse without taking his hand { trij T file in li le, or shifting belts. Fora grooves gearbox could be so ar correspond the speed and direction of ro and will clean the of the entire shaft could be changed. more effectively and quickly tub shaft, which is ordinarily con brush or any other method. ted to the crankshaft in the automobile, of stock, about 4 or ™% in ‘onnected to the main shaft, which do the work best.—H. Olsen driven by an electric motor, and the _ Illinois. on wood or (

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POPULAR MECHANICS Portable Support for Vise on its side and bolted in position o; the compound rest, which had bee: On jobs where it is necessary to make around to the 60° angle. The by use of a vise it is quite often a problem, next placed on the high-speed cone especially in the absence of a workbench wheel fed back and forth along th: or table, to’ the cross-feed screw being used find a conven- the wheel against the center. ient and stable proved rapid and successful. pla ce to at- center was next ground in tach it. But if manner. If no old emery whee] } some 2-in. a clamp can be made to hold lumber and a_ grained emery or carborundum few heavy W. S. Standiford, Youngstown, O nails can be found near by, A Handy Polishing Whee! a simple and “ ) sturdy sup- The method of securing sti port can read- cloth to a wheel shown in the d: ily and quick- both novel and safe and will pr ly be knocked ‘teresting to anyone w ho uses tl together. A wheel for polishing or smoot! support of this articles of wood or leather. he kia which made of clear hardwood, drilled i: hasthefurther ter to Gt the machine spindle a: advantage of 1 in. from the edge to take a wood:

; slit is alsoc rr ee bebiow kale being portable, is shown in the drawing. 4 a pa gt ut from the latter h It consists of two 4-ft. lengths of 2 by 6-in. outside of the ; ‘ P . ee wheel. | h e TAPER PIN material with both ends sawed off at suit- , ' plug, which is WQOOEN able angles so that the support can be set 114 : . PLUG ~~ . , ~ ‘ _ i- up steadily against the wall. Three cross- . - ameter ior an 8-in. wheel, has a flat on one sid pieces are nailed on, the lower one serving as a step for the worker, whose weight gives additional stability, and the upper one nt a le into as a backrest, permitting the support to be ; which four set against studdings, while the center r i] . , 1eadless nails piece holds the vise.—G. A. Luers, Wash- ‘' . are driven; ington, D. C. : two of these eT are driven Grinding Hardened Lathe Centers straight and . EM The usual way of truing hardened lathe the others Sree centers when they become worn is to an are bent en ae neal them, turn them down to the proper slightly. The angle and re-harden, all of which takes plug in all cases is smaller considerable time, particularly when there hole bv the double thickness < is a rush job waiting Inless there is a cloth or paper used on the whe toolpost grinder handy, as there generally wrench used to tighten the plu s, there is from a piece of flat steel or iro nothing else it one end and having a to do but take’ in a hole drilled in the ce the time and lo determine the anneal the emery cloth to use, centers. How- wheel, bring the two ever, the. slit and tear off, leaving enoug! drawing _ over the nails in the plug whet shows how Next, pull the plug around with the the centers of until the emery is drawn tight a lathe were’ wheel; clamp in this position a1 ground with _ taper hole, half the diameter of w! an old emery the plug and the other in the whet wheel. The wheel wascarefullytruedupto job is completed by fitting a tape a level and sharp-cutting surface. Then,re threaded on the end for a filliste: moving the toolpost, the wheel was laid flat screw, and counterboring for the

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POPULAR When fitting new strips of emery wheel, tear off the correct length, e old piece as a guide, and press ls over the nails in the plug, then the latter in the hole and press the ls above the plug through the slit me time, tighten with the wrench -two halves of the taper hole come then slip in the taper pin. The is then removed and the screw on tightened, thus binding the plug rainst the emery. A Kink for Paperhangers wall paper on a side wall essary to see the edge of the paper to bottom in order to get the cor- I very dithcult to do when les, for it is impossible to them as well as with the I have found that this difh be eliminated to a great extent r a small lath nail slightly i yn the edge of the paper as far is necessary to get the point about one-third trom the top. The nail can 1 and the paper hung against he slightest fraction of an inch eeded in lapping, and this lap can 1 down so as to present the appeal! a perfect butt joint.—A. A. Kelly, bt? id. V into Traveling Lamp Illuminates Gauge tanks are located in dark gauges have to be read at latter should be wel! illuminated he illustra- tion shows a Wr a novel installa- tion of this kind. It con- sists of an electric which is rigid- ly connected to the pointer of the gauge and hence travels up and down with it illuminating the scale. An long lampcord is used so that a suit counterweight can be arranged as LIQUID n, causing the lamp and gauge pointer ve smoothly together. A _ distant 1 may control the lamp.—Kenneth eshall, Webster Groves, Mo. MECHANICS 963 Lunches Checked at Special Trucks \ Chicago factory permits its employes to bring lunches but does not allow them to be kept in lockers or carried into the op erating department because left-over food thrown into wastebaskets, corners or on the floor, attracts rats, mice and other Checking pests erai tr were provided. ploves leave their celving num ant. Short! moved to the the worker cl permitted to eat it locks are provided f I ; Elgin, Illinois vent pilfering and mix-uy Transparent Flap Protects Drawings From several standy sirable to present hn client or prospect transparent paper, work present appearance venerally be ery store One edge pasted on t! upper edge and told work. W! ere the long time he bottom forced by pasting it bet of tough paper W here aq tion is desirable or necessary, a1 flap of craft paper can be used New York City.

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Homemade Centri fuge for Farmers By L. B. ROBBINS kK VERY farmer knows that the fat con- 4 tent ot rately and quickly by means of a or centrifuge of the kind shown in the drawing However, the ot manu factured machine often keeps the dairyman milk can be determined accu “whirler” cost a from using one, and this led one farmer to design andconstruct simple centrifuge at The device from old parts that up farm It rectangu- lar frame, holding a horizontal haft, | has a home made mach'ne »1C¢ k e d tl lop. ot al V ooden 1s were arout | inKS d } e con- and a vertical s with mounted on each a beve if year as shown, a whirl . hand crank test ing ar! and tw The fi about tubes. built 1 } ic > atl ] +o} ] i oe Homemade Ce Determine the Inexpensive to + and 3 in. wide, of in about screwed to the e1 pe hardw ood stock ] or ; re ones, and if desired long pieces In. | mi braced wit! lwo bearing sides, to take the the arg bushed A | nani two i\ 1 j noie bev el with sl rank an ] | os ] i an IS ' h 1 1 WW ers aia as ' il 1 close mes! sal shaft: two holes and bu the ge on the vert ] I } 1¢ 17 iter pit mou cro ( he Repairing the Faucet ten pet faucet that n the stem oT hap t} 1 p! washer 0 ession necessary to purchase the parts are not usuall be al \ repair can read ' man, howevet! The old l off and the end of the filed down smooth A hole, large enough to receive the end of a dry-cell binding post, is then drilled this end, and the binding post sweated in place, screw end out. The sodlies 1 la \ SCcTeW clippe¢ stem in 964 bevel gears of an old ice-cream were found satisfactory for this Che whirling arm can be made fri in. length of in. round tened and drilled in the center vertical shaft. A pipe nipple, nut are fitted on the upper end of t to hold it in place, and after the arm is slipped over the end, tl screwed On the ends of the i vg steel ; ( armtwo F« rod clevise tached, and OT ti piece tubing loosely 1» by 1 les

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| A Convenient Campfire Hob By ROLAND B. CUTLER ‘ )E methods of holding pots and ( ttles over the campfire usually cause ir less inconvenience in preparing ut such trouble can be avoided by g a campfire hob ofthe kind shown ustration 'b is made of pipe and fittings and be carried along in the automo it is small and weighs only about 7 onsists of a post which is driven STRAP BOLT - «POT HOOKS am . POST SOAP BOX _ WASH BASIN OR DISH PAN FRYING PAN a heavy spike can be pushed through to serve as a rest for the crane, which is set into the end, and also as a handle to pull the post out of the ground when breakin: camp. The crane is made of lengths of ¥g-in. pipe and fittings; it consists of one 13-in. length of pipe having tees screwed on both ends and shorter extending lengths to support a revolving hob to which the cooking arms are attached. A 4-in. nipple sae die Th a Ff » GRIDIRON TOASTER AND BAKER Campfire Hob, Made of Pipe and Fittings, Weighs About Pounds an Seven in the Auto; the Lower Details Suggest a Few Handy Cooking Uten e ground almost its entire length revolving crane fitted with cooking to hold such units as grid, grate and he post is a 24-in. length of pipe having a hole drilled through ut 3 in. from the upper end so that 1 OUOKS, is screwed int bottom tee crane to ht The hob is mounted arms as shown. It i floor flanges - ’ lo + le ai top ot the I betweet consists with holes drilled edges to accommodate large spik

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966 POPULAR MECHANICS 4 are slipped through %-in. pipe nipples of iron elbows are fastened to the ar various lengths. These fit loosely between pins so that they can be used either the flanges and are fitted with tees that Although every camper has his o hold cooking arms extending at right as to which cooking utensils are |] angles. To one of the cooking arms is at- the lower details in the drawing ly an ordinary some useful ones. A dustpan from } tached a grate, which is simp gas-stove grate or similar contrivance’ the paint and varnish have been bur bolted to a floor flange. \ gridiron is at- with the bottom pertorated, make tached to another cooking arm: it con- cellent toaster and baker. It is fitt, ists of another gas-stove grate, also at an extra perforated bottom of sheet tached to a flange and fitted with a number _ bent over and riveted to the side ) he shape shown. mon frying pan is also used, wit pot hooks are mad r N 10 galva- sion made from a piece of sheet iron wire | I t > end of an eted to the handle Che armt vith a wire hanger units must be ] ; - he crane forthe pur- turn over accid +t e1 1 eit SNOWS a 1 } + a Be Dracket that ¢ them up, or A simple and ping such leaks temp: tor whic! ne mobile radiator cemet means ofaclip made _ after the latter has to the shape sl \ This compound wire used for thi piping or give purpose is cot The cement ton - covered water systeni dt vire intended season, then, whet permanent repair c if desired, cement can be left for several years without doing any the writer left the origina together. A small incubator, which leaked bad little experi the cement was added, for four menting will not one leak has ippeare show the cor- Ferris, Elbert i, Micl rect length for ; the hooks. Serviceable Dandelion Hook = aati Place the clip . 9: Ss K” Occasionally tl & PORTRAIT In position and ¢ . , - . of a hoe render — the portrait *1 : bout 1 and it is then ust aa ever, a serviceal for tl e camera ens » center and the | lf there tne hool ened in line Stopping Leaks in Incubators ae ee he 100-egg siz shape shown, a \ shaped notch being cut in the end and filedtoa sharp cutting edge PI es 5 _ SHARP begin to leak after a One of the points is EDGE this causes much trouble, cut to form a pulling the interior too moist for good hook, the throat of which is, of « 1atching results, and also involves consid dull. A tool of this kind is very har erable labor and trouble in repairing the it can be used to cut the dandel resoldering the joints, tightening their stems or pull them out entt }

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POPULAR MECHANICS -eplacing Auto Spindle Bolts replacing automobile steering- bolts, it is sometimes difficult to e openings in the axle jaws and the the spindle lined up. This difficulty n be remedied by placing the lower he spindle in the right position be- the axle jaws and turning up an- pindle bolt from below far enough | the spindle in position. Then e upper end of the spindle in place h down the new spindle bolt from until it meets the lower bolt. The olt is turned out a half turn at a pping the upper bolt gently each is done, until it starts in the of the lower jaw. is 4s Improvised Lard or Fruit Press efficient lard or fruit press can be ised in a short time from two of l-in. oak, 4 ft. long and 7 in. t one end and tapered down to form es at the other. A number of grooves are sawed across the wide ends as shown, about % in. apart, and two '4-in. holes are drilled at these ends for bolts to make a loose, ad- justable hinge. A cheesecloth sack of fruit or lard is inserted between the grooved ends and after the BanGies are squeezed together tightly, a loop of placed over the ends to hold them. rd or fruit juice is pressed out and n the grooves, dripping off into a tacle below.—J. T. Garver, Hunting- enn. A. Novel Wood Yard der to avoid the unkempt appear- that firewood thrown carelessly into always presents the wood “yard” rated herewith was devised. In effect ard is a good deal like a: small corral, liliar sight on every western ranch. of peeled logs of fairly uniform di- er, the construction is similar to that og cabin with the “chinking” omitted. ends of each log rest in a shallow in the bearing ends of the logs 967 underneath. The uprights for the gate are held in place with lag screws, driven into the logs next tothem. Asa further means of strengthening the gate posts they are mortised into the bottom log, on which they stand. The cross arm on top, con- sisting of a split log with its flat side rest- Presenting a Neat Appearance, This “Yard” Keeps Firewood Stored in a Convenient Manner ing on top of the posts and held in place by lag screws, adds somewhat to the strength and not a little to the appearance of the yard. Such a wood yard will do not a little toward tidying up the picnic grounds or camp sites where firewood is a _ neces- sary factor in the activities of the place, nor would it be out of place on many a well regulated farm. Where timber grows in any quantity at all the material out of which to make it is always at hand.—C. L Meller N. D Fargo, Milk-Bottle Cover A common cup or tumbler 1s often used as a cap ona milk bottle to keep the dirt out. This practice, although convenient, is not very economi- cal, as the cups and tumblers are often broken. It is much bet- ter to make a lid from a small tin baking- powder can as shown in the illustration. The can is cut down so that only about 1% in. of the side remains and four V-shaped slots are cut into the side to permit it to be bent inward as shown. A cap made in this way will fit closely over the mouth of any milk bottle, and can eas- ily be removed.

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PGPULAR MECHANICS Portable Garret Step half an hour or so the flaps can rea: loosened with the aid of a knifk In bungalows where limited space does same gum can be used to stick th: not permit built-in garret steps,a “folding” together on the opposite side and it stepladder of the kind shown in the draw- remains to gum the top flap after i: ing has been found very convenient. Itis the new letter. This method ma made of 1 by 5-in. lumber, the risers being “penny-pinching,” but in this count: thing that effects economy in the off household is well worth while. kink is a good one to know for gency.—John L. Ailen, Cortazar, } H 1 | Making Fishhooks Easily Detachable "--- When one desires to remove quickly from a line in order to one of another style it the knot is too stiff to un- tie. An exceller simple attachmetr lows hooks to |] and replaced common. dress large size, prefer with a “hump,” the e | line i slipped on illustration. Dipping th ROLLERS enamel or paint before u them less liable to be seen L. B. Robbins, Harwich, Mass adder for Use in Bungalows Where Lim- Prohibits Permanent Stairs at uch an , n ange hi Reserve Gasoline Tank ig meamgeradtod pe \ gallon gasoline can, kept in is a time and trouble-saver tor the motorist. The usual practice is acai iadialien “eal a separate can, but this has the d z tage ot being hard to stow w iv Irom ta tened to the top of t hold it on the two vert! rrangement and low ered to + > OT Cas Re- Using Envelopes r eit i ( n be used le out. holds the flaps ‘ : LINE conte tened, after which be and stuck together the carburetor by merely turning met! od of | l g “ A good place to store the reset ips 1 t moisten a towel, wrincin: under the front seat, brackets be it out until rather dry, and spreading it out to hold the tank securely in posit between a folded newspaper. The letter is connection should be made as cl then put on the towel so that the back of carburetor as possible, so that if the envelope is in contact with it, the news feed pipe becomes clos ged, the paper folded over all, and a moderately pipe can still be used.—G., A. Luet heavy weight put on to keep it flat. After ington, D. C.

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POPULAR MECHANICS Removing Stuck Bullets bullet stuck in a rifle barrel can removed in the following way: iece of wire of the kind and size barrel hoops and long enough to e bullet from the chamber end of rel. Flatten one end of the wire by ring it out cold, forming it to a oint like a flat drill, and file the arp, rounding off the corners to ore. Ifa breast drill is handy the tightened in the chuck and the bul- ed out. If a carpenter’s brace is necessary first to flatten the end vire to fit the chuck snugly. As ery soft it is a matter of only a few ts to drill out the bullet. The rifle e thoroughly cleaned and oiled be- ring a loaded cartridge.—Clifford 1, Toronto, Can. A Simple Drawer Stop iten occurs when one is in haste, drawer is pulled out so far that it ut entirely. This can easily be pre- | by means of the drawer stop shown lrawing. It consists of a small block of hardwood, screwed to the side ofthe drawer and against the back as shown, the screw be- ing driven through the corner of the block as indi- cated so that it can be | down when it is desired to remove wer. The block should be raised h enough to strike against the front ce above the drawer, and the screw be tightened enough to prevent the from falling down accidentally.— neider, Clinton, Mo. mndragging Anchor for Small Boats es for anchors used to hold small ng buoys seemed so exorbitant that led to make an anchor myself, and » at a fraction of the cost of a pur- lone. I got several 2-ft. lengths of ron rod from a neighboring dump- round, and bent the ends over as 1. Then I forced these rods through k of ordinary cement and turned the t An- toward the mouth of the sack. 969 other rod of the same length was threaded at one end, a large washer slipped on, and a nut then screwed on to keep the washer in place, while the other end was bent to form an eye through which the anchor line was slipped and tied. This rod was pushed WASHER AND NUT, at AY / DRAG ROD: Nondragging Anchor for Small Motorboat Made from Sack of Cement and Iron Rods into the bag of cement with the eye ex tending outside of the mouth as shown. The cement was saturated with water by means of the garden and left to harden overnight. The result was as good an anchor as could be purchased, and it cost only 75 cents—the price of the cement. —J]J. E. Hoag, Los Angeles, Calif. hose Connecting Ford Rear End A simple method of connecting the Ford rear end is shown in the illustration. the rear end as far forward Jack up one wheel with the jack tipped forward as shown. From under the car guide the joint with a screw- driver, and, by turning the wheel to aline the male joint member with the hole. the jack will force it into place. One man can do this alone very easily and quickly—C. W. Knight, So. Windham, Me. Place as it will go.

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POPULAR MECHANICS Simple Screen-Door Check Considerable annoyance is occasioned by slamming screen doors. To overcome this a simple and inexpensive door che’: can CLOTHESPIN LEATHER SCREEN DOOR a-- SCREW b N SCREWEVE T eg 2 Sot) ae = *\s—— @ seemendivn Screen-Door Check Made from a Tin Can and a Clothespin materials vailable vith the out % shown, ot the doot he check consists hed tothe veye and a stove- , “piston” or disk, forced with a di in, both of which SCTeV 1attac top of the screen he end of the clothespin. / ston e he momen- prevents it from found necessary to pon clo nters in the end of the can, > | and al —_( reorge M. slowly, *h as QOoOv- ing cook ympact and 1 le simple A Handy Holder for Bulletins, Cook Similar Pamphlets Books, and holder made of shown in the photograph. It is l by 9-in. lumber; the base is 12 in long and the vertical piece which to the base in the center, as shown. j 6 in. high. The edges and corner are rounded and the whole rubbed with sandpaper. A length of stiff nized-iron wire bent to a U-shape tened over the vertical piece by fore ends into holes drilled into the base booklets may then be shifted at either side, in the same way as a lox book. A pamphlet may also be reste reading, on the upright, as show: left-hand photo. A hole drilled in th: makes it possible to hang the holde pamphlet up out of the way.—Har Harvey, Buhl, Idaho. Enlarging and Reducing Photos width of enl: rge and redu i i kno is kno quickly be found by means of device shown in the illustrati 3 strips of thin, str tw rf whicl ire iduated i1 fractions. plain strip is =] laid across the origina l photogra on diagonall from to corner as hown, and one of the graduated pieces is then laid parallel to the sides » height of when the sists of corne that it inter- sects the upper edge of the diago a point which is the correct | enlarged or reduced photo, a dotted lines in the drawing. graduated piece, or a ruler used just as well, is laid alo the photo Wi ] i at the left-h: distance fri corner where this scale intersects t] lar scale is the width of the des ‘eduction. ment can be made of wood « a pivot for the ie in strip vuides for aduated one simple form n in the illustrat described above is just as convenient projection at the foot of the aids in getting it exactly perpendi the other one.—Harold E. Benso1 der, Colo. show verti

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By B.M.Ikert TECHNICAL EDITOR “MOTOR AGE”

Si

Part II main bearings are slightly loose can be tightened by removing one om each side of each bearing cap. ber that not more than one shim be removed, because if the loose- o great that taking out one shim remedy it, the bearing should be ed, and this is no job for the inex- ed The shim removed must be innest, hen the ent has ade on e main vs, the hould be ntly free turned ne hand. ing that iin and i{t bear- re fitted, nN pro- NUTS AND COTTERS CAMSHAFT BEARING to install ton and ting-rod ies. Before doing this, however, ould try the connecting rods for fit shaft. This second test is made to ure that the shims have not been Be sure to smear plenty of oil on the pistons and cylinder walls, and then proceed to fasten the rods to the pistons. Above all things make sure that the piston - pin screw or other fastening for the pin’'is securely tightened, and then locked with *acotter pin. In replacing the pis- nd rod assembly some way must be ed to compress the rings. It is advis- » buy one of the universal ring com- COMPRESSOR MAIN BEARING ~ CONNECTING ROOD when the Lower Half of the Crankcase Is Removed pressors that sell for about 75 cents retail. The slots in the ends of the rings will, of course, be turned as outlined in Part I, so that no adjacent ring slots are in line. When the piston is in place, the connect- ing rod can be pulled over and fitted on the crankshaft. A generous supply of oil is applied to both rod and bearing and the cap is then put on. Be sure that the nuts are drawn tight and that there is a cotter in each bolt: fore cottering, see that the bearing is ad- justed properly With all pis tons and rods in also, be- place and every thing tightened and adjusted it be pos sible to crank 1 Photo Showing Parts of the Engine to Be Overhauled and Ins>ected ae Cn b y hand. lThere should be r<€ | he heartme but the bearings must not be so tight that the crankshaft cannot be turned with the hand crank loo much clearance and their sistance to tur lng, between pusl rod bushings will uce noise. nate thi pushrods r guides, or both. \ maximun »f .OO8 in. diametral allowable VALVE ‘arance is pushrod and guide n son 1 apparent ance 158 Like ings, the pushrods an amount. the camshaft bear 1 1 yuides do not ear rapidly and should the replacement ot these parts be it 1S better to get necessar&ry complete new assembly, or have an expe fitting cy linder rienced mechanic do the necessary We may now assume that the 971

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972 POPULAR MECHANICS head and crankcase have been replaced and that these parts are all tightened and locked where locks are provided. No old gaskets should be used; in every case a new one should be installed. Also, when tightening the cylinder head go at it systematically, striving to tighten evenly. If there are three rows of bolts or nuts holding the head, vith the center row and then tighten one nut on the right row, follow- ing a tightening of the in the other outside row. of the tank is clean or not. If ¢! considerable dirt in the bottom use den hose for cleaning, then drain ¢} thoroughly and allow it to stand remaining water has evaporated. | the bottom fittings and connect ¢ line to the tank. The overhaul of ¢ system is then complete. art If the lubricating system has bee: tioning properly let it alone. If t! leads are accessible, you might go « ~ W ith one opposite Give the nuts a final tightening when the engine m. _Before y connections and makesurethat all and not leaking. The oil most common of trouble. advisable to remove it about evet miles for cleaning. In practically stallation strainer 1 locat crankcase and can be of a plate or plug strainer cause 1S War®r ou engine her parts over it to that To put the cooling syst all lock washers, the radiator w nuts, etc., tight and in place. Che exX- haust pipe and muffler should be cleaned, with sj il emphasis on the muffler itself. parts the exhaust leave the for ot oy ~ + i this 1S reached by care- in the bottom of t ully see em in ith a hot solution ing soda. The stret of the should be about the same as u housewife for cleaning floors solution in the radiator o for five or six cotters, ieth are hours any oO! i little fine graphite on his prevents accumu- d makes future removal thing to do with the 1e1 washing the inside with If cooling sys- clear water. there is a pump in the tem remove the pump stuf- fing-box glands. Then ex- > is to give it a good clean- ‘ration includes cleaning the h compressed air, removing bulb from the gas tank and the carburetor float chamber and icuum tank has not the the amine the pump shaft for wear or corrosion. A shaft with corrosion marks deeper than %e6 in., or a shaft with grooves v into it to the same depth, should be replaced Start o1 system by examinin orn been in and cleaned. Take iding the top and lift out l ne cork all f both inner float screen top wed € ed and by cleaning tl The distributor itselt cleaned and the inter be filed to from arcking. plugs and lay them on tl the porcelain end of shell in the vise from the shell for remo metal Remove little with it es punctured e detected by shaking the float. " » be n usual on ac- the nut in the vise ; entering Do not at- of breaking the a permanent repair wrenc ured float but new and Wi 1 heavier tha O isoline porcelain make h_ slipping ( omplete each plug bef next one yet a one as sor When points dy! mn as possible assemble the lain is removed from t clean it and the examine the porcelain fot If any cracks are visible ne celain must be provided A < the plug and then set t : tween the electrodes with the or thickness gauge. In doing this re ber that the electrode that the shell is the only one that should b: ed all these from the possible Some gas vou have cover iin all the gas main supply tank and if remove it for cleaning. tanks are difficult to remove, which c¢ all the fittings at bottom of the tank should be re- moved and a jet of air passed through the tank. If air is not available you can open the filler cap and note whether the bottom p¢ yrce shell prop: ase } ie fasten 1S

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POPULAR MECHANICS distance. Never Some care must ed in the assembly of the plugs the copper gasket is properly When the plugs are finally in- is well to bear in mind that for pression engines the plugs should -d in more tightly than usual. thing to remember is that a per- et is required between plug and head in order that the heat-con- properties of the plug be retained. attempt to install a new set of er points, as this is a job for an ed mechanic. The same may Se | other parts of the ignition, start- ighting systems. idd acid to the battery solution; eems to be necessary, have the attend to it. The care owner can give the battery ends pplying distilled water at regular and maintaining tight connec- the battery and through the elec- tem. he exception of the Chevrolet and yyce, all American passenger cars pped with the disk type of clutch ince of the cone clutch consists in ipplications of neat’s-foot oil and ubrication of the throw-out bear- eyond this, a grabbing or slipping be cured only by roughing the icing or by installing a complete ng The non-adjustable type of disk clutch requires but little at- As wear occurs on the fabric- ites compensation is provided by the adjustment on the pedal. ter must be free so that it does not e floor boards. lry-plate Borg and Beck clutch has adjustment for wear. Adjust- made by setscrews which a circular slot in face of the clutch- plate. To adjust, VS are loosened and a clockwise direc- increasing and lockwise for de- t] ision The nt is best made clutch pedal is hat is, when the disengaged. and correct gap enter electrode. station two he tet lubrication ly work that can be ken by the car owner the transmission is ed. Do not attempt the installa- gears, bearings or other parts of The gear-box cover should be 973 removed and the case filled with kerosene. The kerosene should be “sloshed” around and then drawn off through the opening in the bottom of the case which is vided with a plug. Follow this operation with replace- ment of the drain plug and then fill with kerosene. Use a paintbrush or stick to get into the cor- ners of the case and when you have dis- lodged all old grease, drain the case again and replace the plug. When you have the case thus thoroughly cleaned, fill it to the level of the countershaft with fresh lubricant. The rear axle and universals will come in for some attention if the car has been oper- ated for a year or more. Regarding the rear axle the extent of the owner’s care 1s confined to lubrication and cleaning and unless there is something wrong do not attempt to improve it. If the axle is un duly noisy call in a mechanic but do not fail to drain the old lubricant, clean the axle housing and refill with fresh lubricant every 5,000 miles. The universal joints, if of the metal type, should be inspected tor and lubrication. There is only one cure for a loose metal universal joint and that is re- placement of the worn parts. Never fill these joints to more than two-thirds their capacity, as anything above this will be thrown out and soil the body. The fabric type of universal is very easy to maintain and should be given an inspection about 5,000 miles. Put a wrench on the bolts that hold the disk assembly to gether and | as tightly disk-asse low ed to ’ pro- ADJUSTING / SCREW lc yoseness ever) > nuts up If the any length of in the fabric rated and it to instal i 1 Generally spe: brake system of the car is such that only lubrication justment can be applied by the a verage owner. A job that will be required about

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974 POPULAR MECHANICS every 30,000 miles is relining the brakes, are among the most neglected which generally requires the removal of the modern car and should hay: the rear wheels and sometimes the front erably more care than usually giv: wheels. With the exception of the actual At intervals of 10,000 miles th: fastening of the brake lining to the shoes should be removed, the old greas: and bands there are no operations on the out and the bearings inspected brakes that require any great skill. It is placed if any are worn or pitted recommended that where a lining is worn _ bearings are used they should be to 46-in. thickness or less, the brake be re- spinning in the hand. _ If they have lined. For best results remove the bands’ ency to stop suddenly or have or brake shoes and have the local garage- grinding sound when thorough], manapply the liningto indicates that the balls or race them. Your job then worn and a new bearing should will consist in reinstall- stalled. Roller bearings are inspect: ing the newly lined ally after cleaning and in every parts,freeingthemech- gardless of the type of bearing u anism and adjusting. should be filled with a full supply 4 In extreme cases_ lubricant before replacing. Never =“ BRAKES you will find brake- front wheel bearing so tight that t! operating shafts that binds, as this will soon ruin the are so badly rusted that they will require The ideal tension is reached whe: sawing loose with a hacksaw and installing practically no end play and where t of new shafts. For other cases of brake- stem of the tire will tend to fall t shaft seizure apply quantities of kerosene tom, indicating that its weight i or penetrating oil; then, when the shaft is to rotate the wheel. Asa general 1 free, apply plenty of good grease or lubri- bearings are allowed just a slig! cating oil. When new lining has been ap- of end play while ball bearings in t plied and all brake-operating shafts are wheels are fitted somewhat mor: free and lubricated you may go ahead on’ The nuts on the spring clips oft: the adjustment of the brakes, which is usu- loose and it is very important t ally described in detail in the car manual. they aretight. Ifthe spring-shac! The up-and-down play of the steering ings ate worn so that they are slo; wheels is remedied by loosening the clamp’ the shackle bolts replace them or lock screw on top of the steering-gear bushings. If the springs are e bracket and turning the adjustment nut rusted it is advisable to remove t! down. This action forces the shoulders assembly entirely, supporting tl of the column closer to the thrust bearing. suitable means such as woode1 Some gears have an eccentric bushing jacks, or blocking. The sprins mounted in the side of the bracket or hous- apart and the leaves are tl ing. There are generally holes or slots in cleaned with emery cloth, afte the end and face of these bushings which individual leaves are allow them to turn after the locking de- lubricated with graph- vices have been removed. Some gears. ite grease and re- have a thrust adjustment for side play on assembled. Remember the pitman shaft. This adjustment is either to clamp the spring in a thrust screw with locknut or consists of a vise when removing washers of varying thickness interposed the center bolt, as between the steering bracket housing end otherwise you may plate and the face of the pitman shaft. Re- strip the bolt and nut. pack the steering-gear housing with non- If there are any fluid oil or heavy steam engine oil every leaks or tears in the three or four month The drag link, top fabric have them mended. which forms part of the steering system, material is discolored and brittle should be removed, cleaned, inspected and it with a good grade of top dre lubricated each 10,000 miles. Adjustment let the latter soak in. The same and removal are made possible by screwing side curtains and the upholste a slotted nut in or out. The steering an old car can be made to look qu spindles and bolts should receive regular date simply by putting new bindir lubrication and should this point be neg- rial along the doors and where th: lected, it will be found that the cause of _ stery is tacked to the body. New hard steering will be traceable to frozen on the floor boards also greatly or non-lubricated spindle bolts, or king- the appearance and if the running bolts as they are sometimes called. These are covered they may be fitted

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POPULAR MECHANICS 975 ling or a new covering, as re- large screweyes long enough to screw e last step is to go overthe car through the sliding strip on the window at no part has been neglected. casing, which prevents the strips from be- devices, like shock absorbers, ing pulled out of place. After driving in ters, horns, etc., should be gone’ the screweyes the sash or screen is put in inv adjustments made that may place and marked for the wood screws irv. When allthis has beendone which pass through the eyes as shown.— ir has been taken out onthe road Geo. A. Mohl, Buffalo, N. Y. ut, the mechanical work can be hed. The final operation after test is to go over the body with a Neat Shaving-Brush Holder good _ polish and the lamps and nickel work witha good nickel polish. With this done the owner is ready for another season of driv- ing. In clos- ing, it should be borne in mind by every owner that _there are cer- wall, and a beyond which it is not advis brass clip These include such operations ) 91d ng bearings, repairing the ignition handle of etc., which are not within the shaving SS the average owner's ability as a brush. If plate GLASS PLATE In fact, the owner whois nota’ glass is used c will profit most if he confines his jt should be pes to a regular schedule of lubrication about %@ in. thick. A hole is first drilled gine and chassis and an inspection through the glass near the top to accom tire car at regular intervals. Keep modate a heavy binding-post screw. This open for loose and rusted bolts can be done by means of an ordinary twist , and do not allow mud or grease drill, made very hard and lubricated with a mixture of camphor and turpentine. The nger than one day. If these simple clip for holding the brush is made from a e tollowed the maximum service of length of %-in. heavy brass strip, bent to the car is capable will be delivered. the shape shown, and soldered to the top — of the binding post A short brass link, astening Screens and Storm Sash having a hole at each end, is used as a hanger, one end being held under the head of the binding-post screw. The appear ance of the holder can be improved con siderably by having the metal parts nickel plated ‘Tf a wood panel is used instead of a glass one it should receive several coats of water-resist! When not in use a shaving brush should be hung up so that it can dry thoroughly and quickly. A convenient holder that permits this is shown in the drawing; it will add considerably to the life ot the shaving brush, besides serv- BRASS CLIP ing as an ( SOLDERED TO ornament in | ee er the bathroom. The holder consists of a glass or wood panel, which is hung on the had considerable trouble finding and simple means of fastening nd storm sash, but after trying commer- [ hit up = idea of i creweves SCREEN OR : STORM SASH od screws n in the il- n. This is espe- ood for oO Gc or similar small piece of wood it is usually floor win- by SCREWEYE necessary to bind the parts together until is many Od the glue is dry. Rubbing the cord well with wwners have soap before it is tied around the wood will er long enough to reach them from _ prevent it from sticking to the glue and it und. The idea is to get some fairly will be much easier to remove. Binding Glued Pieces ! y WwooD When gluing a broken rung of a chair

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976 Small Homemade Bunsen Burner Amateur mechanics and jewelers will find a small bunsen burner of the kind shown in the illustration of considerable FLARED, CUT (AND SOLDERED NY CL habia #16 OR IB ~~~ IRON “-.- TELEPHONE BELL Left, Photo of Homemade Bunsen Burner; Details of Construction Right, usefulness. It can readily be made in a short time from material always available. The base consists of an old alarm-clock or telephone bell filled with lead. A short length of *e-in. brass tubing has a %-in. nipple soldered at right angles to it as shown, and a nail, drilled lengthwise and driven snugly into the tube, is inserted through the screwhole of the bell and into the lead, when the latter is still molten. A good way to fill the bell with lead is to set it on a flat surface and pour the lead in through the screwhole. A length of iron wire is wrapped around the %-in. nipple and is sweated on with solder; this pro- vides an excellent grip for the rubber tub- ing, and prevents it from slipping off. The hole drilled through the nail must be very small and exactly in the center so that a very small jet of gas is passed through the center of the upper part of the burner. A small hole, breaking into the vertical one, is drilled through the side of the tube, in the center of the nipple. The size of the hole in the end of the nail is decreased by tap- ping on it until it is about in. in diam- eter; if made too small, it may be enlarged by reaming. The upper end of the brass tube is flared out and slots are cut in it as indicated, by means of a small jeweler’s saw. A 2-in. length of %-in. brass tubing is also flared out at one end and this end is soldered to the top of the other piece, which completes the burner. @To clean a greasy sharpening steel, first soak it in turpentine and then in a solution of strong soda and water. POPULAR MECHANICS Sack for Picking Fruit After using various kinds of picking fruit, all of which were less inconvenient, I found that an o; 2-bushel grain sack having a stra top and a belt at the bottom so that easily be carried, was the most sati The strap, which can be made fro: of heavy canvas, doubled over an is formed into a loop that can be over the head of the worker, a: curely sewed to the top of the sac! loops are sewed on near the botto: sack for a belt to pass through; should be long enough to encir: the bag and the waist of the worke: should have a buckle to make it ient. With this arrangement bot! are free and a bushel or more of easily be carried around, and, by the top loop, the fruit can be du: the ground at once.—Arthur L. G Pleasant, Iowa. Hiding the Spare Ignition Ke; Most autoists have two keys fo nition lock, one carried on a key constant use and the other kept or in the office. But an emerg: provided against is the loss of o: ring while far from home, and there- fore it is a good idea to have a_ third key hidden somewhere on the car in a place known only to the owner:r or operator. Two meth- ods of keeping this extra key are shown in the drawing. A block of wood, split and hollowed out in the key, has been used by the several years. The two pieces oi t are held together by means wood screw driven through it as 1 3eing an apparently useless block no one is likely to take particu! of it, and it may be safely put in t box without great risk of the key | covered. The key might also be b« the inside of a channel-iron bu shown.—J. V. Romig, Allentown, |! BOLT KEY IN WOOD BUM BLOCK NUT ~~._ - KEY wegen 8 IL

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POPULAR MECHANICS eaning the Coffee Percolator percolators occasionally become ind all efforts to open up the fine scrubbing and washing are usually \ good method of doing the work | the percolator in a gas flame for inutes and then tap it lightly; this i all the holes at once. Obviously, much better than attempting to e holes open with a needle.—H. E. t, Chicago, Ill astic Mitten on Brush Prevents Sore Hands men, creamery workers, and other en whose duties include the wash- | scouring of cans, pails, vats, and tanks often suffer from cramped and bruised hands, due to the constant use of scrub brushes. A Wisconsin dairyman, how- ever, uses a simple protector, which he claims lessens the trouble to a considerable de- It consists of a section of dis- inner tube, cut and tacked to the the scrub brush as shown. The fits comfortably within the elastic thus formed, and enables tte to hold the brush in a working po- vithout straining the muscles of the the mitten also protects the back ind from accidental scratches and caused by contact with the can. 4g Preventing Loss of Umbrella a common oc- lose um in trains and \ simple ot preventing is to tie a of stout cord, vith a spring clip end, to the um handle landle as shown +1] - ’ liiustration Che attached to the or coat ot the so that when nce to Ca&rs,. UMBRELLA + SPRING! cuP re the car the ot the umbrella W. Erickson, New York City. vill remind him of An Improvised Ferry A camping party selected a camp site near the bank of a narrow but deep stream. On the other side of the stream a farm house was located and this was the near- est place where the camping party could A Novel Method of Using a Rowboat to Ferry Across Stream obtain fresh food supplies such as butter, milk and eggs. To avoid the necessity of going to the nearest and also to the tiresome rowing stream, pleasant for the women, a simple ferry was improvised in the following way: A small hired and a rudder about three times the usual size was fitted to it. \ was rigidly stretched between posts on opposite sides of the stream and a sheathed pulley was run on The boat was attached to the means of a rope about 30 ft. long, the bo pointing upstream The boat could easily be moved from side to side by nipulating the rudder ' the left, caused tl the right velocity of the it only took about it, a distance of Dale R. Van Hor: around ay oid the bridge, task of which was not over boat was : | heavy wire two strong this wire pulley by then and vice strean @ Scratche can ture by rubbing sisting of equal pat gar, using have disappeared polisl a soit rag

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POPULAR MECHANICS Adapter for Bayonet-Socket Lamps In fitting up a boat, summer camp or garage it is sometimes desired to install standard-sized wire and fittings but to use the low-voltage bulbs. The drawing shows a simple adapter made from an ordinary screw-type attachment plug. The hard- rubber screw cap is removed and dis- carded ; it will then be found that the inner screw sleeve of the plug will just about allow a bayo- net-type socket to fit into it. A reg- ular socket may be used or one made up from the right size of thin brass tub- ing that is slit and drilled out to take the lamp base. A fiber or hard-rubber plug is driven into the lower end of the tube and drilled cen- trally for a small brass machine screw having a flattened head and a small brass nut. A light spring is placed between the head of the screw and the fiber plug to form a spring contact—a double-contact lamp base would require two such con- tacts. After soldering two short flexible- wire terminals to the sleeve and bringing them through to connect to the attach- ment-plug screw-contacts, the sleeve is driven into the attachment-plug sleeve or is soldered in place. The outer swiveling screw sleeve of the attachment plug is then set in place and the adapter is ready. DISCARDED CAP ‘SLEEVE ADAPTER COMPLETE Extension Handle for Egg-Beater The suffering absurd beaters. One can just about grasp the aver- long wondered that will put up with the little handles on egg- writer has humanity and dinky age handle and after two or three minutes of beating the hand is tired out hold- ing the beater in position in the bowl. The im- proved “pistol- grip’’ handle shown inthe draw- ing was therefore fashioned from stiff metal and tried out, much to the satis- faction of the better half of the household.

EGG- BEATER HANDLE

A piece of sheet steel, 6 in. long an. wide, was cut to the shape in Three holes were drilled in the sn arm and the wide section was beat: a semicircular shape over a piece This latter made the handle. Then : of the beater handle was drilled wit holes to match those in the new har two were riveted together, and the was complete. This handle can be ¢: firmly, and, owing to its size and offers a firm means of holding the steady without tiring the hand and a the operator.—L. B. Robbins, Har Massachusetts. Neat Recoil Pad for Trigger Guard The trigger guard of a “kicking” shotgun quite often bruises the user’s middle finger more or less painfully. One sportsman who experienced this trouble remedied it by wir- ing together side by side four %-in. pieces of small rubber tubing, fastening them to the trigger guard as shown in the illustration. This : ture recoil pad was not only efficient being practically unnoticeable, det: in no way from the appearance of t Easily Made Window Ventilat< Ventilation without annoying dr be obtained by using a block arra: shown. This block is permanently on the outside sill and can be 1 pushed over from its position un window so that the window can be It is made from a length of 2 by 2 terial, ably wood fit bet sid¢ casing and on for t dow tight number of holes are drilled in two a sides at right angles to each ot shown, care being taken that they go clear through in one direction the block is pulled over toward the it will occupy the position shown drawing, permitting fresh air to ent room.—Paul R. Frohring, Cleveland

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A Water-Driven Ferris Wheel for the Camp By D. chief merit of the amusement de- shown in the drawing is the fact will give the users alternate sun iter baths as long as they wish and it effort on their part. Because of holesome fun and the simplicity of the wheel is a desirable addition to ummer camp situated on a stream ufficient current to operate it. If heel is properly balanced and the ; seated opposite each other are very equal in weight, a current with a } 'x8"x3i-* 4 \’ fof v i Lge KS ge? SEAT DETAIL | _ ” -\ PIPE 32° LONG ! Pay i s ———= fy") \\| Ht 5x42" BOLT |i) | ih, -- 2X6 ~A} || il a 36 J ¥~.- 4X6 POST CENTER ASSEMBLY WSR SNA SW Sean SSS Soo ROCK SIDE ELEVATION ‘ity of one mile an hour will turn the |. A current of three, four or five per hour will keep it going even h there is a difference of 25 or 30 lb. R. VAN HORN between the riders’ weights, but the weights should nevertheless be balanced whenever possible. Two 4 by 6-in. uprights are set in the stream with an inside clearance of 3 ft. The posts are sunk several feet into the bottom and further braced by one or more guy wires running from each to rocks sunk in the bottom. Though most of the strain Campers Located near a Stream Can Have a “Barrel of Fun” with This Easily Constructed Ferris Wheel comes upon the up tream side, the must be rigid enough which would interfere with of the arms Four 2 by 6-1n pieces each 10 it. lor are used forthe arms. Strips of cut from each edge, beginning at ter, so that the width of the pieces will be to prevent wood iTe the cen 979

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980 POPULAR MECHANICS reduced to 4 in. at the ends. These are mounted upon a %-in. rod, passing through the tops of the upright posts and are held properly spaced by a length of 1-in. pipe, 2 ft. 8 in. long, slipped over the rod. The ends of the rod are threaded, and nuts screwed on to tie the parts. The outer ends are connected in much the same way by %-in. pipe and %-in. bolts. These smaller outer bolts also carry the four seats, which are suspended from them by strap irons, bent as shown in the detail and fastened with screws to the underside of the wide boards. The upper ends are drilled for the rods, and the pipes, which are placed over the rods between the strap-iron supports, not only keep the arms spaced but form good handgrips, as well. The clearance between pipe and seat should be 8 or 9 in. for the greatest com- fort. Small holes are bored through the arms as indicated and by means of stiff gal- vanized wire, the four arms are spaced equally. This bracing withstands any or- dinary strain and avoids the need of more complicated bracing at the crossing of the arms. Ordinarily the seats should sub- merge not more than 20 in., though the greater the depth to which they go, the greater will be the power provided by the current. Assuming that one person takes each seat, the wheel is kept in motion by the push of the water against that | back which.is inthe water. As he « and begins to ascend, the next pe: just entering the water, so that though the momentum created woul, the wheel over at least one rev: there is always at least one person water and at least one “power im every quarter turn; it will be foun the wheel will turn when empty, b slight pressure of water against the \ seats. To prevent excessive wear wooden bearings, it is advisable four large washers to fit the “-in. rox attach one by means of long wood to each side of the arms where the) at the center. This will also reduc¢ tion. If desired, this plan can be « out also at the points where the ar bolts pass through. If the fit is tight ever, the rods will turn with the whe: the friction will occur where th¢ pass through the strap irons. Care should be taken in selecti: wood. A wood that will war; when wet, should be avoided ab Straight-grained fir or pine will well. To save a little in cost, the po be cut on the spot from small trees. Plans should be made to the wheel when camp is broken and it away for use again next year. MATERIAL LIST 4” by 6” posts, 15’-0” long y = by 6” pieces, 10’-0” long %,” pipes, 31” long 1” pipe, 32” long 4 $ 4 ] 4 straight-grained boards, 1” by 8”, 2’-7” long 4 %” bolts, 36” long 4 2 1 pieces flat iron, 4” by 2”, 16" long ¥%” bolt or rod, 42” long 100 ft. No. 9 galv.-iron wire Destroying Ants It sometimes happens that the house be- comes overrun with ants and some method is necessary to exterminate them. Sprin- y \ ‘ “NUT | { roying Ant Colonies by Means of Formaldehyde kling powdered mercury bichloride (poi- son) around where the ants travel will cause them to leave quickly and stay until every trace of the deadly chemical | appeared. An alcoholic solution of t chloride painted on the floor wh« ants cross is also very effective. The ants’ nest can also be destro means of formaldehyde. Obtain a of 1-in. pipe 5 or 6 ft. long, and rod to slide easily inside of the pipe a nut on one end of the rod, place t inside the pipe, with the nut on t drive the pipe down into the ant hi 16 or 18 in. The pipe should be with a file at intervals 8 or 9 i: Withdraw the rod, moving it up ar to dislodge any dirt inside of the pips pour in some formaldehyde and re] rod, which is worked up and down t the chemical into the soil, the rod be few inches longer than the pipe f purpose. After the liquid has soake the ground drive the pipe down to a1 mark and repeat the operation. lively side stepping may be necessa dodge the ants,

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POPULAR MECHANICS ising Efficiency of Outboard Motor rly every user of an outboard motor ire of the fact that the motor loses and the boat consequently loses owing to the frequent tendency of ater to “cavitate’” about the pro- which is especially noticeable when at is bouncing through a heavy sea; the stern of the boat comes near the e it often “sucks” air instead of with the result that the motor races nay be injured. s trouble can be prevented by the ad- of a shield, as shown in the drawing. hield is a piece of “¢-in. sheet brass o the shape indicated and large eh to project over the propeller. A s drilled through one end of the plate at it-can be slid,onto the drive shaft. propeller is removed by loosening. the ain boss nuts and giving it a direct A brass ring to serve as a collar is driven onto the stationary portion of haft. This ring should be about % in. ind can be made by hacksawing off a of brass tubing about %e in. in thick- ind of slightly larger diameter than aft, or better still, of such a diameter t is a driving fit over the shaft. After ing is driven down over the shaft the plate is set in place and a second ring on to hold the plate securely, and vhole assembly is then sweated to the e plate’s resistance against the water ractically none, for its edge cuts BRASS RINGS Plate Installed on Shaft over Propeller Increases Efficiency of Outboard Motor igh the water like a knife. Besides nating the tendency of the propeller ick air, it prevents considerable splash- ibout the stern of the boat, when the t is running with the wind, and spray is vn into the back of the boat to the dis- tort of the occupants. 981 Hair-Drying Attachment for Fan Drying the hair with an electric drier is a quick and convenient method, but not every one cares to buy one for such occa- sional use. Where some other electrical K-12" --2 CATCHES,/ Handy Blower for Drying Hair, Which Is Attached to Electric Fan and Provides Warm Air appliances such as a fan is at hand, an at- tachment can easily be made for it, that will serve the purpose. The attachment consists es cone-shaped piece of brass, to which a rubber tube with a noz- zle is attached, as shown. The cone 1s made by cutting a circular piece about one- third larger in diameter than the fan guard, making a radial cut from the center to the edge, putting the edges thus formed over each other and riveting them together. Three catches made of brass are riveted to the cone so that it can be securely fastened to the guard. The tip of the cone is cut open and flared out so that about 13% in. in diameter, can be to it \ 6-ft. length of rubber * same size is attached to this a 4-in. length of brass tubing, rounded sentially of a sheet metal such as a brass sleeve, soldered tubing of sleeve, and with the end is pushed into the end ie hose to serve as a nozzle. a 134-in. used for the hose, as shown, In one inner tube was but it may be still handier to use the rubber tubing usually provided vith a fully equipped vacuum cleaner. The drier should be placed on or near the top of a radiator so that it delivers hot air motorcy cle @Aiter cleaning ali mud from the running boards with soap and water them with kerosene to remove the grease and oil spots. Kerosene is also excellent for cleaning floor boards. auto wipe

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POPULAR MECHANICS Toy Compressed-Air Boat Among the many kinds of toy boats that ject vertically when the air tube is can be built by any boy who is mechani- inside. The open ends of the pipe ally inclined, is the one shown in the’ closed by means of two disks, rivet: drawing. It is soldered « prope 1] ed by hole is ¢ means of com- TIRE VALVEX~. ios : aimee Tic ene of pressed air re ER \ TIN CAP | \ x disks to leased under ae " ~ ee, the end val the water at the = project out stern. The hull zy = and the is a l-in. board, ductor pi 2 ft. long and 5 . then fast or 6 in. wide. - =e . to the hu One end is } i . —— means of sawed to form . => = a tin stra a bow and : = such a ma rounded on the = — == a that this underside as —— > points to shown, while : cans — S = valve to a rudder post in TIN CaP TIRE VALVE length of ! the center and RUBBER - S copper abuvut 1 in. TUBE = : > which from the stern. 7 F 7 tened t

The hullisthen mertac) i stern and given one or TUBE” TIRE VALVE “CONDUCTOR PIPE ww to project two applica-

1 in. unde

der is w to dry t h or- VULCANIZED TOGETHER-~ bores CAP out o f ough) betore Simple Toy Boat Made from a 1-Inch Board and Propelled by and ntted the second is Means of Compressed Air Released under Water the rud applied. The hole; it power plant is to be installed next. It con- be tapered so that it will fit snug! sists of an 18-in. section of automobile — spring clothespin is used to pinch th inner tube and an equal length of 3-in. ber tubing shut in order to prevent galvanized-iron conductor pipe. Theends_ escape of air from the air tube whe of the section of inner tube are vulcanized inflated. Air is pumped into the shut so that it will be airtight. An air through the center valve by means valve is provided in the center and also at ordinary bicycle or automobile tire p one end. The former is complete with toa pressure of about 10 pounds. As the inside core, but from the latter the core as the clothespin is removed the jet is removed. A hole is cut in the pipe issuing from the underwater copper ti through which the center valve will pro propels the boat at a surprising ilisn tions of paint, W water as the first coat Sousa aiiailasi. aiaiasbliss A smal being allowed -ENDS OF INNER TUBE

Ornamental Handles for Auto Doors Cleaning and Peeling Potatoes \ number of the lower priced automo In some parts ol the southert biles have the inside handles of door novel and interesting method of cle catches made in a very rough style. The and removing potato skins is used crude appearance of these handles c: potatoes are placed in a pail half tu improved considerably by dressin water and a number of rough stone down on an emery wheel or grindstone added. By stirring the potatoe so that the dust caps used on automobile- stones around in the water, the skins valve stems will fit over them snugly— wear off due to the abrasive action o L. H. Unglesby, Baton Rouge, La. stones, and the potatoes are washed «

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POPULAR MECHANICS ypewriting Mathematical Symbols -eeping a notebook with a typewriter isually necessary to make such signs as the equality sign, exponent, etc., by hand. However, many symbols can be made with the ‘vpewriter; for the equality sign, type in the ordinary manner, then back- and press the shiftkey very slightly. ake an angle use the underline dash, backspace and place the oblique line e the dash. Exponents are made by ‘ssing the shiftkey slightly —Ruth lerson, Lake Mills, Iowa. Good Use for Old Carpet Sweeper en a carpet sweeper no longer sweeps isually thrown away. Upon examina- it will be found, however, that quite bristle is still left on the roller, which be used a few more years as a push brush of the kind shown in the drawing. The brush and the wooden handle are re- moved from the sweeper box and also the metal brace that holds the handle. The shaft of the brush has a bearing hole at each NAILS KEEP end which usually fits BRUSH FROM TURNING / - = ——==—— the two pivots on the brace. It may be nec- to bend the brace together a little rder to hold the brush securely. At nds of the brace are two small holes vere previously used to hold spring Small wire nails are driven through holes into the wooden part of the so that it cannot turn when in use. r one side of the brush has been worn the nails are simply removed, the turned around and again fastened as re—Mrs. Caroline Michel, Jersey City, Jersey. HANDLE- BRACE, BRI SsH-* Muffling the Alarm Clock sometimes desirable to muffle the clock so that it awakens the sleeper out disturbing those in cent rooms. A stout er band will be found useful for this pur- [t is snapped around clock and over the bell hown, whether the bell ocated on top or on the k, and muffles the sound st effectively, RUBBER BAND 983 Increasing the Usefulness of the Alcove A breakfast alcove constructed along the lines shown in the illustration has been found to be a very useful addition to the nll! fi hi n H fii ba ! rf | i hl | SS a Useful Alcove for the Kitchen with Shelves in the Double Back and Capacious Boxes under the Seats kitchen, especially where storage space is ata premium. Besides being very attrac- tive, this alcove has special features of use- fulness such as the shelves for china or silverware, and capacious boxes under the seats for linen. Anyone who is able to handle the few simple tools that are usually found in the home workshop can build this alcove with- out any trouble. The general dimensions are subject to variation in accordance with the shape and size of the kitchen, as well as the maker’s fancy. The _ entrance should not be less than 10 in. wide to allow one to enter easily. The table can be made to fold against the wall by means of hinges. The shelves and back proper, together with the seat and the table, are made of ¥4-in. wood; the hinged false back is made of good strong wallboard. Small door catches hold the false back in place, and hinges of attractive design should be used for both back and seat. Wien completed, the may be enameled if desired, white lead being first used to fill ali cracks and nail holes coats of flat white paint are surface being sandpapered lightly after each coat, then the enamel flowed on.—Ludvig Olson, Gait alcoy S Two apphed., the coats esville, @ A cheap tire cover can be made by slit- ting an old inner tube on the inside and cutting off a 2'%-in. strip all around. The tube is then turned inside out and stretched over the spare tire.

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POPULAR ls which iuctioned ir W indsor’s as himself y to handle than more easily than lsor does not urge 1 let people know the f his effort in this n to him.—N, Sakata, MECHANICS FROM THE EDITOR’S MAIL BAG that blooms Dentry, I have been about twenty 3 has helped me ideas furnished | can recall right now larm 1S a wing- plans; windlass arrangement, ¢ under house; gr furnish extra radio sets from wheelbarrow machine 1 room tabl AST TO OUR WOMEN READERS ESPECIALLY ninded that

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POPULAR MECHANICS ADVERTISING SECTION At $35 Radiola Ill. Two Radiotrons WD-11. Head telephones. In brief, every- thing except the dry batteries and the antenna, You Can Add Radiola Loudspeaker . . . $36.50 Radiola Balanced Amplifier(push-pull) togetlong distances with a loudspeaker. Including two Radiotrons WD-11,$30 Or Buy Complete R ADIOL A TILA, the amplifier com- ined with Radiola III in one cabinet; w héoas Radiotrons WD-11,head tele- } uonesand Radiola Loudspeaker,$100 ew Radiola II NEW two-tube RADIOLA—designed and built by world-famed engineers in the great RCA laboratories—pricedat less than you could build it for athome! Areal RADIOLA —including the tubes and headphones. A new model. Improved in sensitivity and selectivity. Getting distance on the headphones, and near stations on a loudspeaker. Receiving clearly— reproducing truthfully. Its thirty-five dollar price means at last that every home every- where can tune in on the fun with a small receiver built for big performance. Radio Corporation of America Sales Offices: 233 Bre oadway 10 So. La Salle Se. New York Chicago, Ill. RADIO CORPORATION OF AMURICA Dept. 516 (Adress office nearest you Please send me yourfree Radio Booklet Name Street Address REG U.S. PAT. OFP,, There are many Ri idiolas at many prices. 433 California St. Send for free booklet that describes them al San Francisco,Cal, City State

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POPULAR MECHANICS ADVERTISING SECTION Ip Specifying Cypress, ‘the Wood Eternal,” say “TIDEWATER.” WR. EA OTD BBO Pa f HE ONLY true “Wood Eternal” species ia {ky of Taxodium distichum (known com- SS mercially as CYPRESS), is that which grows within about 200 miles of the Southern and Southeastern coastline of the U.S. 43% S-8S=s5 "Ps C = > — There is a kindred species, whose habitat is farther inland, on higher ground,whichhasnot the same decay-resistant traits,and which often is substituted when the buyer fails to be insis- tent upon identified “TIDEWATER” CYPRESS. SSs3e8 : ss St SHB Bsa ooo G's 2 + & mora wows SSeS = jg ew se For complete security, you need only require that the : s licensed trade-mark MM ral ‘Tasoe Mane Rec U.S. Par. Orrce be the identifying symbol of every Cypress board or bundle. Responsible lumber dealers will gladly aid you to obtain the genuine. We invite correspondence, and will respond in a helpful way. Our first concern is to see that you get the genuine “Wood Eternal,” when and where you want it. Respectfully submitted: SOUTHERN CYPRESS MANUFACTURERS ASSOCIATION 1219 Poydras Bldz., New Orleans, La., or 1219 Graham Bld3., Jacksonville, Fla.

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Popular Mechanics Magazine 200 E. Ontario Street, Chicago, U.S. A. H. H. WINDSOR, Editor London: Hachette & Cie., $17 King William Street, Charing Cross, W.C.2 Paris- Hachette & Cie., 111 Rue Reaumur Melbourne, Australia The Australasian News Co. —_ — §ssUED MONTHLY SUBSCRIPTION: In United Scates and its possessions, also Canada, Cuba, and Mexico, per year, postpaid - To all other countries in the Postal Union - All subscriptions are discontinued at expiration. Please examine the date printed on your wrapper. SINGLE COPY, 25 CENTS $2.50 3.00 Entered as Second Class Matter Sept. 15, 1908, at the Post Office at Chicago, [linois, ander Act of March 8rd, 1879. Entered as Second Class Matter at the Post Office Department, Canada thly by POPULAR MECHANICS CO. Copyright, 1924, by H. H. Winosor, Copyright in Australia. Copyright in France Vol. 41 Abattoirs—Cattle Killed by Electricity Airplanes to Carry Mail in Alaska Airships—Dirigibles to Be Anchored to Ships’ Masts Animal Mummies Lifelike by Special Fluid Arctic Region—Figures Modeled in Wax, Sugar and Inoieum Australia, Size of : Automobile Accelerator Guard Automobile nos with Death Automobiles, Lighting—Regulator for Auto Lamp Automobiles—Mud “Boots” for Safety Parking a Problem, by John Ihlder Parking in Revolving Tower Signal Lights Indicate Turns Aviation—Airmen to Cross Frozen Top-o’-the World Limit of Flying Speed Predicted Stores Cached Along Route for World Flyers Axle Shaft, Cost Reduced by Hot Swaging Bark from Trees Rivals Hides in Toughness Baseball—_ Dummy Catcher for Indoor Practice Bible, Martin Luther, Well Preserved Birds Caught with Noose Birds Fly Hundred Miles an Hour without Stop Birds of Paradise Sought in Jungle Birds, Zoo, “Surgeons” Save Lives of Bleachers Fold Up in Wagon Blowtorch and Soldering Iron Combined, Pumpless Boat, Gliding, Skims on Water, Ice or Snow Bomb Carried on Airplane Weighs Two Tons Boring Machinery—Earth Boring Machine on Truck Bridge Moved on Pontoons Brushes, Electric Floor Bull Fight Ring in Mexico Butterflies, Dormant, Revived by Light in London Zoo Calves Fed by Rubber Nipple Attached to Pail Camera, Automatic, Winds Up Its Own Film Roll vanaries, Shipload to Meet Demand Cap with Double Visor Card Table “Clock” Tells Next Dealer Camivals, Traveling, Sell Happiness Cattle, Carting in otorcycle Cement Designs Centering Punch Transfers Hole Centers Chait, Easy, Made of Two Steel Springs didden in Table Ch eal Gas Supplies Power for Automobile aurches of England, Ancient, May Be Shipped to U.S. gat Wrapper Run by Motor rm Typewriter to Desk without Screws ie Ring Clamp Nozzle Holder with Prong At- cChiments Coins, Gold, Millions Lost by Wear —_ Pocket, Touch of Button Opens au stion—Fuel Tablets Burn in Water Es and Review, by H. H. Windsor oe dy ne Clutch Disk, Repaired by Tool Cull Lines Electric “‘Fingers” Harvest _ aks -ocked by Spring re ale ng, Has Chocolate Coating pnders Honed by Motor-Driven Tool Dearttas amp with Revolving Dies Desk eld be alley Dammed for Power D0 President Token of British Good Will ““aphone—Electric Stenographer 886 885 842 875 873 823 925 902 830 845 877 Contents for June, 1924 Dishes Peeled to Clean Dyes, Potato Tops Yield y a - Wee Expresses Thanks for Earthquake . elp Earthquakes, Weak Spots in Earth’s Crust Clue to Earth's Slip Revealed by Zenith Tube Photography Editor’s ail Bag Eel, Electric, Scientists Study Power Plant of Electricity, Coal Slack to Generate, in Alaska Electric Speed Motor of 10,000 r.p.m. 9 Elevators Carry Daily Nine Million in New York City Eraser, Adjustable, Lasts as Long as Pencil 9 Excavating Machinery — Trench Pull-Shovel Backs Away from Work 8 Exhaust Gas Analyzer Checks Carburetors Explosions from Dust Checked by Tests Fertilizers—Need of Shown by Tabulated Disk Finger Prints Enlarged Fire Apparatus—Electric Alarm Foretells Start of Fire Fishing in Ocean with Horse and Wagon Fishing—Anglers Lured to Haunts of Trout Leaf Bait Stuns the Fish in Madagascar Fish, Perforated Strainer Supplies Air to Food and Seeds Preserved by Light Rays Forest Fires—Warning Given by Instrument Fountain Pens, Double Barreled Fuel from Dust and Waste Fundy (Bag) ernetene Tides Will Rival Niagara Garage Built of Auto Tags, Rust Proof Gas and Oil ~~ Safety Tank, Cap for Gauge Checks Cylinders Gears—Speed Reduction 90,000 to One Golden Calf, Temple of, Unearthed near Ur Gold Mined from Buffers Golf Charts Teach Strokes Golf Club Face of Aluminum, Removable Golf—Indoor Putting Cup Golf—Skill Improved by Science Gun Crew Prize, Letter ““E” Painted on Ship Gun Fires 32 Bullets a Second Handle, Screwdriver, for Combination S Wrenches Heart—Turtle Heart Beat Recorded by Movie Camera Hedge Trimmer Like Mower 9 Hopper Box Sorts Nails Horses Go to Army School Horses, Pull of, Tests Show Household Devices Houses Built Like Thermos Bottles Humidifier, Electrically Connected, Has Fountain Hydroelectric—Mitchell Dam Operates in Twenty-Five Months Hyena Strong but Cowardly Ideas, $78,800 Offered by Industries for Industrial Education, Training for Labor Ink Prints on Dough before Baking Insects and Worms, Floated Out of Soil for Exami- nation Insects Painted to Help War against Disease Inventions, Great, How Delayed Iron Found in Koolan Island in Ironing Board, Adjustable June Month of “New Arrivals” in Field and Forest Khyber Pass, Camel Train Crossing Pontoon Near Kitchen Utensils—Cake Shell Pan for Desserts Pacific [Continued on Page 4]

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[4] [Contents—Continued ] Lighters for Water Heater from Any Floor Lighting—Electric in Millions of Homes Loading and Unloading—Trucks Loaded from Rear by Power Lock, Keyless, Fitted from Inside on Door Lock on Private Telephone ‘ Locomotive, Baby Switch, Gasoline Driven Locomotives Gaining in Power Lost Continent, Search for Luminous Paint, Keyhole Seen in Dark with Marking Machine Works Rapidly Match Box Lid, Wind Proof Milk Bottles, Lock Box for Model— Miniature Streets as Court Evidence Royal Doll House Rivals Palace Model of Town from Odds and Ends Mount Everest Ascent to Be Attempted Again Moving Pictures—Warning Indicator on Film Projector Musical Instruments—Bamboo Orchestra, Tones Vie with ‘Jazz’ Player Built in Automobile Roll Maker Wired to Piano Makes Records Saxophone So Large Player Stands on Ladder Music Used by Surgeons to Ease Operations Navigation—Sea’s Perils Revealed by Wire Drag Panama Canal—Dam, Movable, at Gatun Paper, Waxed, in Box with Metal Cutting Edge Phonograph Master Records, Apparatus Duplicates Photography, Aerial, Reveals Errors in Maps Plants, Electric ‘Sunlight’? Speeds Growth of Plants Supply Enough Light to Take Photographs Police Practice at Target from Bullet-Proof Auto Presses, Steam, Wire Guard for Safety Press Prints Several Colors at Once Printed Matter Reduced by Photographic Process Pumps—Tire Pump, Self Oiling Pumps to Raise Water a Mile in Mines Putty Gun That Fits Pocket “Question Shop” Answers Telephoned Queries Radio—Blind Spots Mystify Science Broadcast Station in Los Angeles Church Causes of Silent Tubes Cleaning Crystals with Alcohol Coupler Permits Selectivity Grid Leak Has Flexible Ribbon Element High Power Station for Australia Indoor Antenna Like Picture Frame Neutrodyne Set Built in Console Phone Block Connects Six Headsets Phone Plug Has Quick Release Preventing Multi Conductor Aerial from Rolling Set Has Parts of Solid Gold Sixteen Tube Set in Restaurant Teletype Success on Planes Tester Condenser Shows Correct Finder Capacity Railways, Swiss, One-Half Operated by Electricity Reflecting Indicator Warns if Lamp Is Out Road Scraper, Fool Proof, One Man Roads Hewn from Mountain Cliff Rubber Suit for Motorist Safe, Pocket-Size, for Small Valuables Safety Devices and Measures—Traffic Righting Safety Movement—Street Car Sides as Signboards Sahara, Six-Wheeled Autos Conquer Saw, Carpenter’s, Has Square Attachment Sharpener for Shears and Mowers with Changeable Grinder . Shoes Sold by ‘“‘Walking Store’ Signs and Sign Posts in Desert Direct to Water Skyscraper, Black Brick and Gold Trim Used for Smoke Screen Dispels Frost and Kills Insects Soda Fountain Sirups Measured by Special Valve in Container Sound, Photos of, to Improve Music and Radio Spools Make Useful Furniture Stakes Adjustable as Plant Supports Stand for Plants, Adjusts to Any Angle Steamer ‘“‘Norfolk,”’ Crippled, Takes to Sails Steeple Jacks Street Cleaning by Bamboo Brush on Tractor Street 33 Years Old Repaired Like New Stump Puller, One Man Submarines, Guarded against Unseen Perils Swine, Raising Scientifically and Efficiently Tank, Amphibious, Aids Warship at Maneuvers Telephones, ‘‘Booster,” Speed Train Dispatching Tent without Center Pole Works Like Umbrella Testing Rubber Toothbrush Bristles Open for Cleaning Trolleys, Aerial, Bolivian Peaks to Have Post, 911 918 830 921 876 889 846 892 854 944 901 875 829 922 906 893 921 913 924 871 866 906 925 854 871 843 867 898 879 870 885 900 893 908 898 925 937 929 939 936 932 940 932 936 933 940 929 936 932 940 876 943 927 8 Self- Turbines—Stream Harnessed near Lake Fully Turbogenerator to Generate 83,000 Horsepower Valves, Noisy, Silencer for Vise Has All Steel Slide Washing Machine Clamps on Any Tub Water He we from Floating Plant for Refinery Weather Watch Forecasts Twelve Hours Ahead Whistle, Locomotive, Can Be Heard Three Miles Away SHOP NOTES Automobiles—Gearbox Used in Machine Tool Driver Babbitting, Shaft Holder for Belt Shifter Lock Box for Nails and Screws Centrifuge for Farmers Conveyor Device Starts Boxes that Stick Cotter Pin, Closing Sides of Dowels, Wood Drawings, Transparent Flap Protects Drill Chuck for Round Shanks Drinking Fountain for Small Stock Hardy, Handy Irrigation Ditches Dammed by Metal Pieces Lamp, Traveling, Illuminates Gauge Lathe Centers, Grinding Lathe Support for Long, Slender Work Loading 5 4 Made Easy Lunches of Employes Checked at Special Trucks Mechanical Powers—Part I Paperhanger’s Kink Polishing Wheel, Handy Poppet Valve Gauge Punch, Pneumatic Roller, Steel, Protects Barn Corner Saw, Portable, Motor-Driven Soldering Kink for Square Corners Soldering—Vacuum Cleaner Furnishes Blast Spindle Bushings, en * Tomatoes Washed by Boat-Propeller Tongs for Lifting I-Beams V-Block Capacity Increased Vise, Portable, Support for Wagon Bed Made to Last Water Heated with Steam Welding Rod Holders Wheelbarrow for Gardeners’ Baskets Wheel Puller, Crossbar and Chain Wrench Made from Connecting Rod + oo 962 953 953 95¢ oss 95 947 95 QS 95 4 9 955 y > 2owo So tn AMATEUR MECHANICS Adapter for Bayonet Socket Lamps Alcove Usefulness Increased Anchor for Small Boats Automobile—Hiding Spare Ignition Key Spring Overhaul Boating—Outboard Motor Efficiency Increased Bottle Cover Bunsen Burner Campfire Hob Carpet Sweeper, Use for Old Drawer Stop Egg Beater with Extension Handle Envelopes Re-Used Ferris heel, Water Driven, for the Camp Ferry, Improvised Fishhooks Made Detachable Ford Rear End, Connecting Glue—Soaped Article Will Not Stick Gun—Recoil Pad for Trigger Guard Hair Drying Attachment for Fan Holder for Shaving Brush Incubator Leaks Stopped Ladder, Portable, for Garret Lens, Fitting Camera Mitten, Elastic, on Paint Brush Pamphlet Holder Photos Enlarged and Reduced Press for Lard or Fruit Screen and Storm Sash Fastening Screen Door Check Sharpening Steel, to Clean Spindle Bolts Replaced Tire Cover from Inner Tube Toy Boat, Compressed Air Umbrella Loss Prevented Ventilator, Window Weeder for Dandelions Made from Hoe Wood Yard = SPoOwwwwwwwowo + 1 aI & wwwwwowwweo n of

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1SBaAne -+oeo > 962 953 953 95 Qs 95 9 95 QS 95 9 962 955 9 95 Qs oc * PpoOwwwwwowowowono POPULAR MECHANICS ADVERTISING SECTION DRAKE'S THEY WILL RAISE YOUR PAY— ORDER ON 5-DAY TRIAL The books listed below will perfect you in your chosen trade — pave the way to the Written in non-technical language Every book covers its subject completely. condensed into one volume. money refunded in full if not entirely satisfactory. big positions.

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ction order direct from this page—cross name of ‘ wanted and send in with price quoted. We and send the books on our money-back FREDERICK J. DRAKE & C0. 1008 Michigan Ave., Chicago Drake Books Are For Sale at All Book Stores Mail Coupon For Free Catalogue PRACTICAL MECHANICAL Mechanical Drawing and Machi Gloth $2.00 Cloth $1.50 Carpentry Books Cloth Binding Modern Carpentry, 3" vols The Steel Square Wooden Boat and Shipbuilding. = Design Pattern Making Roof Framing, by_Van Gasbeek . Stair Building and Hand Railing. . Electrical Books by we L ig, by. Suit. Automatic Switching, [Pub. Jan. 1g 500 Practical Appl od Electricity Alternating Current Electric Motor Control Systems... $ Wiring Diagrams and “pee Electrical Tables and Data. . Armature and Magnet Winding. Modern Electrical Construction. Modern Electric [llumination. Electricians’ Operating and Testing. Motion Picture Operation Drake's Electrical Dictionary Electric Motors, D. & A Electrical Measurements and Meter 2 Testing. Deaie 8 Telephone Handbook. -_ asy Experiment Cioth Wireless Telegraph ‘and Telephone Handbook ua Cloth Telegraphy Seif-Taught......Cloth Steam Engineering Swingle’s Handbook for Steam Engi- 4 and Electricians. Leatherette $4.00 Examination Questions and Answers for Marine and Stationary Engi- neers Leatherette $2.00 Steam Boilers......... Leatherette $2.00 Swingle's Catechism of Steam, Gas and Electrical E net neering . Leatherette $1.50 ORDER DIRECT FROM THIS PAGE—ON OUR MONEY-BACK“PLAN books listed above are only a few of the many in yrom ptly after coupon. For FREDERICK 3. D 1008 Michiga® Chicago, Hl. illustrated ca Practical My name ts Your Guide to Home Study

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POPULAR MECHANICS 10 School ar Ho, so ‘High School Course in Two Years! You Want to Earn Big Money! And you will not be satisfied unless you earn stanly ore. motion, But are you prepared for the job ahead of you? Do you measure up to the standard that insures success? For a more responsible position a fairly good education is necessary. To write a sensible business letter, to prepare estimates, to figure cost and to compute interest, you must have acertain amount of preparation. All this you must be able to do before you will earn promotion, Many business houses hire no men nay eneral know- ledge is not equal to a high school course hy? Because big business refuses to burden itself with men who are barred from promotion bythe lack of elementary education. ® Can You Qualify for a Better Position We have a plan whereby you can. Wecan give you acom- plete but simplified high school course in two years, giving you all the essentials that form the foundation of practica 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 bring you success and big money. YOU CAN DOIT Let us show you how to os on the road to success, It will not cost you a single working hour. Write today. It costs you nothing but a stamp. American School Dept. HA A74, Drexel Ave. and 58th St., Chicago — —_—_ eo —— —_—_ —— ADVERTISING SECTION Some men and women seem to attract success, power, wealth, health and attain. ment with very little conscious effort; others conquer with great difficulty; cll others fail altogether to reach the ir am- bitions, desires andideals. Whyisthi sso? The Master Key will tell you ae . No one can read it and not be a changed { per- son. None but will emerge from its magic pages with a firmer grasp of the future—a surer understanding of what he can do, The Master Key is a key with which many are converting loss into gain, fear into courage, despair into joy, hope into fruition. A copy will be sent to you without cost or obligation of any kind if you will address | CHARLESF. HAANEL, 214 Howard Bldg., St. Louis, Mo American School Dept. HA74, Drexel Ave. and 58th St., Chicago Send me full information on the subject checked and how you will help me win success. ....- Architect .-..-Lawyer .. Building Contractor Automobile Engineer “te Automobile Repairman ...-Civil Engineer .. Structural Engineer .. Business Manager ....Cert. Public Accountant ... Accountant and Auditor *.: “Bookkeeper ee ..Draftsman and Designer ... Electrical Engineer Electric Light & Power ...General Education .. Vocational Guidance ..Business Law ..Machine Shop Practice ..Photoplay Writer .. Mechanical Engineer ..--Shop Superintendent ..-Employment Manager .... Steam Engineer ..Foremanship ..-.-Sanitary Engineer .. Surveyor (& Mapping) . Telephone Engineer .... 1 elegraph Engineer .- High School Graduate ....Fire Insurance Expert .-.. Wireless Radio ..-Undecided Become a lawyer. Legally trained men win high positions and big sue — in business and public ifs. Greater opportunities now than ever before. Lawyers earn $3,000 to $10,000 Annually Reauitnsee atep by step. You home during spare tim I mrecords and letters from Lad admitted to the bar in various states Ds conferred. Thousands of succeasful students enro easy terme. We furnish al! text material, in wert Law Lib: rary. Get our valuable 120-page “Evidenee’’ books FREE. Send for them — NOW LaSalle Extension University, Dept, 654-1 Chicago, RiderAge Agents Want Select from the 44 Styles, colors and sizes of ae Ranger Bicycles. Ride and exhibit sample Ranger Ay and make money. Delivered free, « xpress pre _ d, ff iv on Approval. Factory-to-Rider bicycies $21 50 $5a Mon th onany Ranger if desired Bo girls easily save the small mont thiy payments. Parents often advance fret payment. _ qualts y, at factory prices, express prepat id. wheels and equioment, low prices. Send No Gener. ‘do. Business direct with makers. ———_————— ‘ Write today for free CYCLE COMPANY | kssverCstaine. 13 tory prices and m DEPT ice lous easy payment te ———————————— at Home by Mail Yes, learn the secrets of W: Sham pions— to wrestle expertly— ay how to handle big, men with ease — how to win. Be athletic, be * g, be healthy. Learn how to detend y vurself Farmer Burns the world’s most scientific wrestier, = trained the undefeated Champion Fre @otch — who also trained six other World’s Champions, ‘will now train you. his wonderful methods the secrets . Every man and boy in the world, no matt: r what needs this information on SCIENTIFIC WRESTLING PHYSICAL CULTURE — 31U-3ITSU — SELF DEFENSE. ou and get my ——— toly tr00 .» Omaha, Neb.

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POPULAR MECHANICS ADVERTISING SECTION 7 CARPENTERS

“: | GUIDES THAT SOLVE PROBLEMS ttort: ’ . til] fg A Complete Course in Practical Carpentry and Building Work ‘Meare toate sect nae de tilde tra + tine arrangemen subjects POCKET SIZE= 7p simple way it ie explained take the r am- FLEXIBLE Ag Salama ' Wie ode ot lees ae 5 COVERS — ) fo Me. ? alge 4 . handy for the old timers.— Ross Smith, LISSOF 3100 ILLUS- wie Pa ig Sommers Point, N. J. “Good for Professional Car- ters” pen It ie the most handy reference work that I ever came in contact with. ] i é . . ; £ 2 * , It is the en thing that the build- + per- 4 Moe Poth 8p 4 : ing mechan aeete ov every y for F ae j ; “ se bis P reference. — = George H. Wateoo , ‘3 a oe PA , a. ae * 136 Mungoa St.. Long Island magic 2 > i ¥ City. N. ¥. ] 10 No —= NS Poe ¢.¥ Save Hard Knocks” ire— 1 Te Guides are truly wonderful ire a 4 and should be in the hande of } a c q aN . ol youns corgentere op wet ae do. Auvers) - Audet DELS - A‘ \ . eee . 4 , _ rk os . p 4 ago ¢ woul ve saved which CarnpenteRs CARPENTERS Carpentt Ee’ Og Pp "GM: Mefohngton, Bit, , rm $ immond, in fear AND AND ey . 5 i¥ “Good tor Amateurs” ? cos f ‘ ; F \ The books are surely e into BUILDERS 7 pita | has % So em oeays ptt }t ‘ ; und big suc public life, w than ever Annually TOOLS BUILDERS STEEL MATHEMATIC _SQUARE eyes ‘AW FILING SPE LAN JO} > Uniting ; ESTIMATES RNITURE IATES ONS AIFICATIO a APPROVAL! NEW IDEAS—MODERN METHODS— SHORT CUTS Audel’s Guides for Carpenters and Build- |] cuts, time and labor saving suggestions, new ways that f4hi andy volumes of over 1500 pages with } cover the entire theory and practice of the subject illus- rated charts, diagrams, graphs, pictures | trated by sketches and forms al! specific and practical! ns for every job from making the excava- | Audel’s Guides give you_the short cut, professional icting the entire building. You will find | information you want. No need to guess or take / 3 most Complete and comprehensive in| chances. Every day you have before you in this # & both timely and practical. There are | set the exact, practical, useful information that 4 tmples of efficient construction work with | will help you with every job wuat comes up in ideas, solutions, plans, systems, short | your daily work. f To Handle the Job | tion for Carpenters, Builders, Join- HOV That Puzzi You ers, Building Mechanics and all NO MONEY! , pe es Woodworkers on—Care and Use of |] MERELY SEND usands > 41 p ols— J > Steel § are nds of examples of | Tools—How to Use the Steel Square COUPON AND y, new)

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POPULAR MECHANICS ADVERTISING SECTION } AUTO EXPERT: T5200 AWEEK , Let Me Y Train You / At Home|” to BOSS the = CHICAGO ATS SHOPS I WILL make you a successful AUTO EXPERT, prepare you to go into business yourself, train you for positions paying $3,000 to $10,000 a year. Keep your ; stay home—just loan me a part of your spare time. As Directing Engineer of the big CH IC AGO Av I SHOPS, I know what training you need and I giveit to you. I train you the “JOB-WAY’ books. Go into the best-paying business : earth—get your share of the thousand million dian sp every year to keep Autos, Trucks and Tractors runnin I TRAIN Be home-training makes Auto EXPERTS! I prepa to BOSS THE JOB! My “ JOB-WAY”’ instruction n you MASTER of every branch of Automobile wo Fact, Electrical, Battery, Ignition, Farm Power plant Welding, Brazing, Vulcanizing, Garage Management, Salesmanshi; etc. I guarantee satisfaction or to refund every penny of your moi Go Into Auto Experts Wanted! Business! $3,000 to $10,000 a Year! Make $5,000 to Bi The “ best-paying business « . y ) g S! W $15,000 a Year of is hungry for EXPERTS can you find such opportunit + . OPP There are thousands of oppor- ~ ne re Oe mewn 15 mill tunities to go into business for ICKS and iTactor to } PPT) : ; ~ million tires to repair, 15 mill yourself, with small capital. Auto Experts J - : 1 - ing and electric systems to ma run big service stations, make up to $15,000a FREE Jobs joteorion to service and replace year! The same wonderful opportunity is wasting for a big Employment waye up to this rich money-n My “Job-Way’”’ instruction prepares you for it. pt.helps my graduates wd r y you rs Vay” inst prepz y get big pay jobs p without tunity! one penny of c« os ee hee ee =5 e 1 B. W. COOKE, Directing Engineer ‘ Big Auto BooF. FREE! } CHICAGO AUTO SHOPS young you are, how much or little ed Dept. A16, 1553 W. Madison St., Chicago FREE Outfit have, this training will make you 2 SUCK Send me FREE Auto Book and proof that I s A Expert. Special inducements and many E* ean become an Auto Expert at home in spare Big repair and test- features right now. Easy terms and low a. sodeced prise and cnay tamman — ing outfit free to my pon brings free book and complete imiormat students! Mail coupon for my remarkable Mail it today! offer. Use it to do my JOBS, use it to make B. W. COOKE, Directing Engineer , use it tomak thie training pay for CHICAGO AUTO SHOPS itself! Dept. A1t 1553 W. Madison St., Chicago, I.

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OPS less for ur jol . OD AUTO 10t irs spt running! pare yo mn make work - Tt manshiy r mone’ nted! Year! POPULAR MECHANICS ADVERTISING SECTION as & ew < A ‘ . » f ‘ . | “What would I do if I lost my job?” HAT would you do? What would your wife and children do? Suppose your employer notified you to- morrow that he didn’t need you any longer? Have you any idea where you could get an- other position ? You wouldn’t have to worry if you were a trained man. You wouldn’t have to spend your mornings reading the “Want Ads” and then trudging from place to place, meeting rebuffs and discouragements, piling up bills, hnally willing “to do anything” if only you _—. ’ could get on somebody’s payroll. Don’t have this spectre of unemployment hanging over your head forever. Train your- self to do some one thing so well that your services will be in demand. Employers don’t discharge such men. They promote them! Decide to-day that you are going to get the spe- cialized training you must have if you are ever going to get a real job and a real salary. It is easy if you really try. Right at home, in the odds and ends of spare time that now go to waste, you can prepare for the Position you want in the work you like best. For the International Correspondence Schools will train you just as they are training thousands of other men—no matter where you live—no matter what your circumstances. At least find out how, by marking and mailing the coupon printed below. There’s no cost or obligation, and it takes only a moment of your time, but it may be the means of changing your whole life. INTERNATIONAL CORRESPONDENCE SCHOOLS Box 5606-D, Scranton, Penna. Without cost or obligation, please tell me how I can qualify for the position or in the subject before which I have marked an X BUSINESS TRAINING COURSES Business Management [ZO Salesmanship Industrial Management { )Advertising Personne! Organization () Better Letters Traffic Management }Show Card Lettering Business Law PiGtoneseushe and Typing Banking and Banking Law (J) Business English Accountancy (including C.P.A.) [L)Civil Service Nicholson Cost Accounting {) Railway Mail Clerk Bookkeeping JCommon School Subjects Private Secretary High School Subjects Spanish (J French Illustrating ©) Cartooning TECHNICAL AND INDUSTRIAL COURSES Electrical Engineering CD Architect Electric Lighting Architects’ Blue Prints Mechanical Engineer Contractor and Builder Mechanical Draftsman Architectural Draftsman Machine Shop Practice Concrete Builder Railroad Positions Structural Engineer Gas Engine Operating Chemistry () Pharmacy Civil Engineer Automobile Work Surveying and Mapping Airplane Engines Metallurey Navigation Steam Engineering Agriculture and Poultry di Mathematics

LILI

Street Address City Occupation Persone residing in Canada should send this coupon to ‘the Interna- tional Correspondence Schools Canadien, Limited, Montreal, Canada.

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POPULAR MECHANICS ADVERTISING SECTION Drawing lableFree! Yes, this is exactly what I am doing. I am giving this drafting ¢ free to ree when youenroll as my student. I do this ensues! pone to have the right elp ambitious men and boys get ahead. This is the kind you will use when yoy have completed my course have become a regular draftsman. Complete Drawing Outfit che drafting table I also furnish free the set of regular working in- struments shown here. You table and instruments free if you en- roll at once. I will do eve possible to help you get ahead. ind of Draftsman’s Working Outfit — because I want to Also FREE *%90 Drafting Course Loe pees ing course absolutely without cost to them. This means you need not pap me for my personal instructions or for the complete working Copy this Sketch and Get Ivorine Salaries up to Pocket Rule $250 ana*300 a Month Positions paying up to $250 and $300 a month which ought to be filled by skilled draftsmen are vacant everywhere. ere are in every part of the country ambitious men, who with practical training and personal assit- ance will be qualified to fill the positions. I can now take and train a limited number of students, guarantee to train them by mail UNTIL placed in a permanent positson at a salary up to $250 and $300 a month. i 7 + a + am | “Draftsman’s bul Here is the Rule you get FREE To each young man stating his age when sending a sketch as shown in box at right, I am going to mail FREE AND PREPAID the Draftsman’s Ivorine Pocket Rule shown here. Chief Draftsman, Engineers’ Equipment Co. | 1951 Lawrence Ave., Div. 4-135 Chicago, Il. Without any obligation to me please mail your book ‘‘Success- ful Draftsmanship”’ and full particulars of your liberal **Per- sonal Direction”’ offer toa few students. Also fullinformation as to how I can get a $90 Drafting Course Free. table and working instruments Free, also how you can get drafting course Free. Even if you don’t send in a copy sketch send for this information. NGM . .ccccccccccccccccccccccccccccccceccocsscococcesoss ercccecce Address Chief Draftsman, Engineers’ Equipment Co. 1951 Lawrence Ave., Div. A-135 sending a sketch I will mail free prepaid the ftsman’s I[vorine Pocket Rule shown here. With it | will send you a 6x9 book on “Successful Drafts- € manship.” Just state your age. There are no condi- tions requiring you to buy anything. You are under no obligations in sending in your sketch. Mail Coupon | Mail coupon at once for full information how you can get

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POPULAR MECHANICS ADVERTISING SECTION We Will Make YouAn Electrical Expert In 32 Months At Coyne Earn $65 to $200 a Week! Or Go In Business for Yourself and Make $3500 ‘ to $15,000 a Year! & Yes, 3% months at the Great School of Coyne, located in Chicago, Le The Electrical Center of the World, will make you an Electrical ; Expert capable of commanding big pay. The whole world of electric- ity is open to the practical man—the man who has had actual ex- Students Doing Actual Work On perience with electrical apparatus. Coyne gives you a practical Power Transmission Apfa-atus training on a stupendous outlay of electrical apparatus, everything from door bells to power plants. Not a Correspondence School We don’t make you a mere “paper” electrician. We train you by practice on our mammoth outlay of actual equipment. We train you in house-wiring by having you do it exactly as it is done outside—not just by reading about it The same applies to armature winding, power plant operating, motor installations, automotive work and hundreds of other electrical jobs. That's why we can train you to become a Master Electrical Expert. No Books—No Lessons—You Do Actual Work Students Working on Massive The Coyne practical course includes no books, printed lessons or A. C. Control Equipment useless theory We train you to work with your head and hands on the same kind of electrical apparatus as you will find “‘out in the field.” Coyne gives you Free a Life S« che larship which enables you to return at any time for instructions on new apparatus which we are ntinually adding to our course. We assist you to a position after graduation. We also include Free a course in radio Age, Lack of Experience or Education Is No Hindrance Our students range from 16 to 60 years of age No previ tre necessary You don’t even have to bea grammar se hool graduate Earn While You Learn! We help students 10 secure Students Practicing House-wiring their living expenses while studying. In Skeleton Houses Send For Free BooK Coyne Electrical School, Dept. A-135 Bend tee tho ig Free Best wins shove Se —- 1300-1310 W. Harrison St., Chicago ol of Coyne and a great part of our massive ele — —— = our y eatalog ¢ 1 quipment. You will be convinced that the only place to get a Dear Sir Pleas send me free py ur es ital " and full practical electrical training is in the Great School of Coyne. particulars of your special offer of Free Railroad Fé he Endorsed by Electrical Industry ___ 1300-1310 W. Harrison St., Dept. A-135, Chicago

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POPULAR MECHANICS ADVERTISING SECTION Famous Course in BOXI This Course Was $5 ERE it is—the famous Stillman Course in Boxing, Jiu-jitsu and Wrestling, now at the extraordinary price of $1.67 instead of $5.00—6 big books—85 lessons, 381 pages, 246 illustrations! This course teaches you the game right in your own home from the simplest rudiments of hitting and guarding most scientific blows and guards such as the Benny Leonard Triple, the Jack Dempsey Triple, the Fitzsimmons Shif So quickly do pupils learn that many outbox bigger opponents after only two weeks’ training. 10-DAY_ TRIAL The Stillman Association Dept. 1224-F, 50 East 42nd St., New York You may send me on approval the complete Stillman Course. When I receive the course, I will deposit $1.67 (plus the actual postage) with the postman, with the un- derstanding that if, after 10 days, I wish to return the cou se | may do so and my deposit will be instantly re- funded If | keep the course, there is to be nothing fur- ther to pay. i asedemed¢ateneaeutws Address Cc anadis an and foreign orders must be accompanic®: b3 eash ($1.67 U.S. funds) subject to money back guarantee if not satisfactory Also Jiu-Jitsu and Wrestlin3 You also learn 15 Jiu-Jitsu holds—how to disarm an opponent to break a strangle hold, etc.—and 14 of the best mat holds—the Gor Toe Hold, the Stecher Scissors Hold, the Head-lock, etc. With the course, you get a Free History of 69 Famous Boxers, v their pictures and “inside” stories about them. S d N M Simply fill in and mail the coup en oO oney When you have the course in yo hands, deposit $1.67 (plus the actual postage) w'th the postman. | the course for 10 days — try it out thoroughly. If for any reaso: are not entirely satisfied return the course, and get your money ba at once. Mail the coupon now to The Stillman Association, Dep

New Easy Way “= to ll CARTOONING : You can now quickly learn to make comics, sport cartoons, animated and serious cartoons, etc. Cartooning is lots of fun—and fun that pays big money! Learn cartooning at home in spare time this amazingly easy way. SEND FOR FREE BOOK Mail postcard or letter today for Free Book on Cartooning. It tells all about this easy method perfected by one of America’s most successful cartoonists—also is filled with interesting facts about cartooning. M<ail card TODAY! Give Age if under 16 years. Washington School of Cartooning Room 306, 1113-15th St., N. W., WASHINGTON, D. C. 1224-F, 50 East qand Street, New York. —

suente Show Cards, Windo Sign ady made letters, Gilding, Tricks ff») the Trade. also gives 100 Alphabets and signs. Book bound in flexible imt. rly pn Eoldedges. and feur ball bearing Show Card / ‘ens. Sentpostpaid$3.00.(C.O.D. l0cex.) L) £) Ogilvie Pub. Co., 57 Rose St.., Dept. 50, W.¥. City EARN MONEY /MMEDIATELY~~ ; WE FURNISH EQUIPMENT TO START /’ Be near Enare ase your Income. You a grove today under t plan and have a Home and mecems! c Sunny Florida on the te rms imaginable. Any size Farm, Groves developed for Nor We raise our own guaranteed Citrus Trees in ou eries. We have the Right lLand—in the Right Locat zit Price, and on the easiest terms. Write for Boo! Call of the Southland’’—It's Free. NORTH TAMPALAND CO., 404 Zack St., Dept. 6-24, Tampa, Fla.

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POPULAR MECHANICS ADVERTISING SECTION UA Aur Pay ARE. ain wT ~ — —= Autemobi!« =, ngineer! 1 Aut mobi i Vol. I . Motors — Engine Part Carbyrator's Valves an S“udricatit “These 6 B Big Books CY utomobile Problems and pew gm cemme My Pay. “C*%IX months ago I was a mechanic’s helper in an auto repair shop. I was anxious to learn the automobile business from the bottom up and thought I could get a practical training by doing odd jobs and watching experienced men handle the complicated work. But I soon learned that I had a hard grind ahead of me, with plenty of dirty work, little encouragement and poor pay. “Whenever there was a crank case to be drained, or grease cups to be filled, or a car to be washed— I got the job. I was willing and enthusiastic at first, for 1 thought I was following the only road to suc- cess. But I soon found out it wasn’t how much I did that counted, but how much I knew. “Several months passed and I was still doing the dirty jobs—merely taking orders, while the trained men were giving them. I was pretty well discour- aged and ready to quit. I went to the boss and asked his advice. “What we need in this business,’ he said, ‘are trained men—men who have studied the principles of automobile engineering, who have — a practical knowledge of ignition, starting and lighting systems, motors, valves, gears, car- buret ors, etc., and who can supervise the big jobs, ell the vorkmen what to do and, if necessary, how 0 do it “He went to a shelf back of his desk and took down six big books on ‘Automobile Engineering. ° ‘T'll make you a proposition,” he said. ‘If you really want to become an expert in this business you'll have to do some studying at home and learn what its all about. Send to the American Technical Society, in Chicago,’ he continued, ‘and get a set of these books. You can buy them on easy monthly payments. With them you’ll get a Free Consulting Membership in the Society, which. will entitle you to the help and advice of twenty experts. With these books as a work and reference library at home and the daily help of these experts in solving your prob- lems, you can quickly prepare for a big pay job in the automotive field.’ “Needless to say, I followed his advice. I sent for the books on the easy monthly terms and received the Free Consulting Membership in the Society. Each night I devoted at least an hour to the study of automobile engineering in all its phases. When I had a difficult problem to work out, or when I wanted some special information about a job at the shop, I sent a letter or wire to the Society and back came the answer. “Tt wasn’t long before I was able to show the boss that I was profiting by his advice. Draining crank cases, filling grease cups and washing cars became things of the past. Gradually I was let in on the important repair jobs; and in three months I was given a special line of examination and esti- mating work, with a helper to carry out my in- structions. With the new work and responsibility, came a real salary. And there’s a bigger future ahead, with plenty of opportunities and big money. “What I have done, any man can do. My oppor- tunity came in the form of these six big pay-raising books and I grasped it. If you knew what I know, you’d never be content with a small pay job when it’s so easy to train for a big one. The coupon be- low offers you a chance to Learn more and Earn more. Why not mail it today? aw an Tech- nical Society, Dept. AA19, Chicago, U. a ae Five Day Examination Coupon AMERICAN TECHNICAL SOCIETY, Dept. AA19 Chicago, U.S. A I want to Learn more and Earn more. Please send me, postpaid, the six volumes of “ Automobile Engineer ing.” I will deposit $3 with the postman on arrival. If I decide to keep the books I will send you $3 monthly for six months; otherwise I may return them in 5 days and get my money. It is understood this entitles me to a Free Consulting Membership in the Society which I may use daily if I like. Name Street City ee Employed by a tee io

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POPULAR MECHANICS ADVERTISING SECTION EARLE E. LIEDERMAN, America’s Leading Authority on Physical Education

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POPULAR MECHANICS ADVERTISING SECTION HOW DO YOU LOOK IN A BATHING SUIT? The good old swimming days are here. Oh boy! But it’s great to rip off the old shirt, into your suit and — SPLASH!! But what a shock to some of the poor girls when they see their heroes come out with their flat chests and skinny arms instead of the big, husky frames they expected to see. YOU ARE OUT OF LUCK Don’t try to make excuses. You are just out of juck. It’s your own fault. You can’t blame any- one but yourself. What are you going todo? She is going to find you out. A PHYSIQUE TO BE PROUD OF It’s not too late. Snap into it and I can save you yet. It means hard work and plenty of it, but— wait till you see the results. THE MUSCLE BUILDER My job is to build muscle. That is why they call me The Muscle Builder. In just 30 days I am going to add one full inch to your biceps. Yes, and two inches on your chest in the same length of time. But that’s only a starter. I am going to broaden out those shoulders and shoot a quiver up your old backbone. I am going to put a man’s neck on you and a pair of legs to balance the strong sturdy body they support. You will have a spring to your step and a flash to your eye, radiating the dynamic life within you. Before summer is past you will never recognize your former self. You will have a strong, sturdy, virile body to be really proud of. You will be admired for your perfect manhood—while others are given glances of pity and scorn. This is no idle prattle, fellows. I don’t just promise these things. I guarantee them. Are you with me? Let’s go. Time is short and we have a job to do. Jend For My New ws Book: — hie ee ~_—s«idIT'IS FREE It contains forty-three full-page photographs of ; myself and some of the many prize-winning pupils 8 I have trained. Some of these came to me as $ pitiful weaklings, imploring me to help them. ! k them over now and you will marvel at their 4 present physiques. This book will prove an 4 impetus and a real inspiration to you. It will thrill i { ! ' i i | X EARLE E. LIEDERMAN Dept. 2006, 305 Broadway, New York City Dear Sir I enclose herewith 10c for which you are to send me, without obligation on my part whatever, a copy of your latest book “ Muscular Development.” you through and through. All I ask is 10 cents to cover the cost of wrapping and ae it is yours to keep. This Me not obligate you at all, but for the sake of your future ealth and happiness, do not put it off. Send today—right now, before you turn this page. Name. Street. . EARLE E. LIEDERMAN Dept. 2006, 305 Broadway, New York City City... State (PLEASE WRITE OR PRINT PLAINLY

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POPULAR MECHANICS ADVERTISING SECTION Iwill m Dental wiles H. A. McCarrie is a recognized as one of the * r ssi on great authorities on Mechanical Dentistry But his greatest reputa- r ip Yents P , EE ; stti > tion is as TEACHER The demand for Dental Laboratory Experts is getting bigger of successful Dental every day! Right this minute there are THOUSANDS of big- Laboratory Experts salaried positions open to you HUNDREDS of wonderful opportunities for running Dental Laboratories waiting for you. Why waste your time in the old, worn-out overcrowded trades? I will make you a Dental Laboratory Expert in a few quick months, help you to a fine position or to go into busi- ness, help you make a big success, just as I hav e done for hundreds of McCarrie graduates Personal, Individual Training! No books here. Learn with tools and instruments. I personally supervise your training. Positively no “classes’’ at McCarrie School. You learn by doing actual Dental Laboratory jobs. Complete training, every branch included: Rubber plates, Crowns, Bridge work, Metal Base Dentures, fixed and removable bridge work, etc. A complete list of subjects would fill this entire page. Yet my rapid-fire, short-cut methods enable you to get it all in a few months, and get it thoroughly and perfectly! It would take years to cover the same ground as an apprentice. 70,000 Dentists waiting for you to open your own Laboratory! Ask Your Own Dentist About This Big Field Dentists will encourage you to take my training, to prepare to open a Lab- oratory of your own. Because they must have quicker, better service than they can get now. Comparatively few Laboratories now. They work day and night, and can't turn out the work as fast as it comesin. Dentists have awakened to the advantages of sending their mechanical work to Laboratories. They are glad to pay $3 an hour for Dental Laboratory work, because their own time is worth $6 to $15 an hour wenens on the patient's mouth. There will be 250,000 Dentists in the U.S.in a few years—se get ready now! Mc CARRIE-Trained fox Experts Always Successful! This is what I guarantee to give you as my student: 1. Free R.R. fare to Chicago or to my new school in Detroit. 2. Employment service helps day students find outside evening jobs, helps night students find day-time jobs—all the help you need to take advantage of this wonderful training. 3. Employment service helps graduates find big-pay positions, or heips you find a good location for your own Laboratory. 4. Life consultation service and many other valuable Bary I don't merely promise you success I GUARANTEE TO TRAIN YOU UNTIL YOU ARE Su CCESSFUL!I RUSH COUPON TODAY! ee oem, a Day for Dental“Lab” Experts Pa be Free Dental Easiest, plonsan est, most interesting work Laboratory Book your own Boss, be successful. make money fror Many start their I ome - on s h string li [ R.R. Fare to Chicago cir own Laboratory on a “shoe-string”™ v | or Detroit —+y McCarrie-trained. $3 an hour the average pt ihe H. A. McCarrie, Director Coupon Brings Full ee ea McCarrie School of Mechanical Dentistry, Dept. 901, now at 1338-1342 S. Michigan Ave., Chicago The enormous demand for MeCarrie-trained Denta Please send me your special offers and free book tory Experts has compelled me to open a new brat about Dental Laboratory work. Detroit. Special prices, easy terms and many extra f now Coupon brings complete information and new all free. Mail it to me personally—today! H. A. McCARRIE, Director McCarrie School ot Mechanical Dentistry Dept. 901, now at 1336-1342 S. Michigan Ave., CHICA Go Name Address

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POPULAR MECHANICS ADVERTISING SECTION $9000 First Year! “When I first saw your inspiring mes sage I was acivil ser- vice employee. Now I have better than a $9,000 F #8 aa position with ; lots of room f . fy/ togrow.” 7 : i et oF Y It would be just as easy to tell the same story about 20,000 men—even more— but what this book brought these eight men is typical. If you do not get a big salary increase after reading this message $1,090 in 30 you have no one but yourself to blame. ona Gin oeare This amazing book is in the railway mail service I decided to make a change. earnings the past thirty days were more $1,000.""— Hartle, Chi- cago, TL irst Month $1000 T seems such a simple thing SIMPLE AS ABC —but the eight men on this There is nothing remarkable page who did this simple thing about the success that men enjoy were sh tk t kl shortly after they take up this re- cre Own the way to quickly sult-securing system of Salesman jump from deadly, monotonous ship training For there are eons ta T routine work and miserable certain Be oe to approach differs - 3 in wo > omore . ‘ . . types of prospects, certain ways to Weeks earnings to incomes running stimulate keen interest—certain a, anywhere from $5,000 to $10,000 ways to overcome objections, bat e ie re ry “ rmne than $60 a a year. They sent for the book, sai down Pe pastes, a= Seine month. Last s . . - ” ‘7 ition and make 1e€ prospect act. weak I cleared Modern Sale manship, that Learn these secrets and brilliant $306 this you can now get—iree, success awaits you in the selling $218.""— : atl : peony Possibly it is just as hard for field. Oklahoma City. you at this moment to see quick ‘success ahead as it was for Ellis : HIS > 4 . M M: C S c= cs A City Salesman Sumner Cook, 20 East Jackson fAKE oa oe i TEST AT tell Blvd., Chicago. When he was earn ; 3 ing only $25.00 a week the large Simply send the coupon for this sum of $9,000 2 year seemed a mil Free Book Ask yourself the ques lion miles away. But read what tions it contains. The answers you happened after he had read the make will show you definitely book we want you to send for whether a big success awaits you Almost overnight, as far as time in this fascinating field Then the is concerned, he was making real road is clear before you. This money. The first year he made amazing book will $9,000. be a revelation to ga » There is nothing unusual about you fe NN satan One Mr. Cook, or about his success Saat comin ‘Last week my Thousands after reading this book National Salesmen’s ‘ec ESMANS earnings amount have duplicated what he did—Mr Training Association ed to $554.37; Cook simply was willing to inves- 12-6. 53 W this week will go tigate. Dept. 12-G, 53 W. Jackson Blvd. over $400.’"°—F. . : : a! « Wynn, Portland. The only question is—do you Chicago, Illinois Ore. want to increase your earning power? If so—this book will $100 a Week in quickly show you how to do it in Only an amazingly easy way. National Salesmen’s Training Associa- tion. Dept. 12.G Chicago, Ill. Gentlemen: I will accept a copy “Modern Salesmanship’’ with the derstanding that it is sent me free. SUCCESS INSIDE TWENTY WEEKS id I Within twenty weeks you can be Name.. ready to forge ahead This may i sound remarkable—but after six- | adaress... teen years of intensive investiga tion the National Demonstration |! | ! | l City $10,000 a Year Method has been perfected—and falfroot, of Boston, Mass., this means you can now step into nto a $10,000 position as a selling position in one-fourth the aa thorough time it formerly took to prepare ai ig. ’ for this greatest of all money-mak- try ing professions. AGO

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POPULAR MECHANICS ADVERTISING SECTION 95 an Hour! “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 thousands of I. C. S. students telling of promotions or increases in salary as the rewards of spare-time study What are you doing with the hours after supper Can you afford to let them slip by unimproved when you can easily make them mean so m~-*? One hour a day spent with the I.© #? 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! INTERNATIONAL CORRESPONDENCE SCHOOLS Box 5610-D, Scranton, Penna. Without cost or obligation. please tell me how I can qualify for the position or in the subject before which I have marked an BUSINESS TRAINING COURSES Business Management Salesmanship Industrial Management [ )Advertising Personnel Organization "| Better Letters Traffic Management [}Show Card Lettering Business Law ) Stenography and Typing Banking and Banking Law )Business English Accountancy (including C.P.A.) [Civil Service Nicholson Cost Accounting L) Railway Mail Clerk Bookkeeping LiCommon School Subjects Private Secretary L) High School Subjects Spanish CJ French Illustrating C2 Cartooning TECHNICAL AND INDUSTRIAL COURSES Electrical Engineering (C) Architect Electric Lighting end Blue Prints Mechanical Engineer Contractor and Builder Mechanical Draftsman LJ Architectural Draftsman Machine Shop Practice L)Conerete Builder Railroad Positions CJStructural Engineer Gas Engine Operating LjChemistry ([) Pharmacy Civil Engineer [J Automobile Work Surveying and Mapping L) Airplane Engines Metallurgy Navigation Steam Engineering Agriculture and Poultry Radio Mathematics Name Street Address City Occupation Persons residing in Canada “should send thia coupon to the Interne- tional Correspondence Schools Canadian, Limited, Montreal, Canada, Wh aE y Miss Half x the Fun in Life? BE POPUL dance well/ Ar World's great teacher, has invented a re1 easy method which enat learn all the newest dan t in a few hours—at very li 7 Ne music or partner needed. Success posi. tively guaranieed! “ 120,00 dancing by mail.” FREE J DANc ING LESSONS— rove you can nh @asily and antte Arthur Murray w Five FREE lessons, including | Secret of Leading, and How to « dence. To pay cost of maillin: etc., enclose 10e¢. Act NOW good dancer soon. Arthur Murray, Studio 209 801 Madison Ave. New York Become an Expert in | DRAFTING in Spare Time at Home Master Drafting and a big job will be waitin Not enough really able men areavailable to [ill t h« aried positions offered by railroads, manufact tects, contractors, electrical works, etc. Chicago 1 train you by mai!—make you an expert—throug! instruction by experienced men. Moderate fees. Ea é R E E Find out before you enrol! or pay ‘ wellqualified you aretofollow Draft Trial Lesson Tech does not requireenrollment of fees in advance but sends this lesson first. W Chicago Technical College, 630 Chicago Tech.Bidg.,Cicag sae! TO BECOME A PROFESSIONAL PHOTOGRAPHER EARNING $35 TO $125 A WEEK Three to six months’ course. Motion Picture, Commercial, Pertra Practical Instruction. Day « ‘ Classes. Ask for Catalog No. 4° N. Y. INSTITUTE OF PHOTOGRAPHY NEW YORK CHICAGO BROOKLYN 141 W. 36th St. 630 So. Wabash Ave. 505 State St. LEARN WATCHMAKING and become independent Good-paying posit lasy tolearn. Send for FREE CATALOG ST. LOUIS WATCHMAKING SCHOOL, Dept. 5. 30 Days Free Trial = Select from 44 Styles, colors and sizes, famous Ranger bicycies. Delivered free on approval, express prepaid, at Factory Prices. You can easily save$l0 to 825 on your bicycle. Prices $21.50 and up. ssa Mon on any Ranger if desired. Parents often advance first deposit. Boys and irls can easily earn small monthly payments. Pay as you weey- best out. § at La pa prices, iow bre pri ~ _araps, wheels a: equi ot, ed name No Money,do business direct with make

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POPULAR MECHANICS ADVERTISING SECTION 19 ELECTRICITY =I = ~—‘*s[SendYou Printing ind be a io 209 w York will A 7 . Thousands of men have tical . . > 3 eee ly found this free book the y terms ; ; . starting point to big : money jobs and success. You should have it. x | TO Prove You Can Qu «= | The Biggest Jobs in ion raiture. vening You know there is no field in the world that offers such 49. noney making possibilities as ELECTRICITY. And now, HY thousands are qualifying a new quick way in spare time in OKLYN their own homes. I will train you in 20 weeks, to step right tate St. into jobs paying from $50 to $150 a week. To prove my state- ~— ment | will send you Absolutely Free a big illustrated booklet ING which I have just written. back now on account of education, experience, you enroll now Think wl it will mean to leave forever No matter where you live, or what you are the low pay rut, to become a trained, efficient Electrical tech- h my course you have the chance to become nician, capable of managing and supervising ten or five hundred time a big pay “Electrical Expert.” men on the biggest jobs; to travel, to be a man of influence- to have a salary of $5,000 to $10,000 per year. Find out now Actual Shop Methods in Your how you can do this. You cannot afford to delay a day. Send right now for this wonderful free book that is pointing the Own Home way for thousands to big money in electricity The coupon brings you this book entirely free, without obligation. Fill vised the wonderful new copyright Shop Type it out. ives you the benefit of Actual Shop Experience S & H ENGINEERING CO. yme. Never before has this been possible. But Affiliated with the Lincoin Institute of Technology nishing my training you will be at home in the Dept. F-i 1422 West Monroe Street, Chicago, Illinois cal plant, in a sub-station, in a battery station, t maintenance men, or in automobile and tractor ting and ignition work because you will have had rience, which no other correspondence school can y it which means everything. Please send me at once your big book, “How to Get the . Md | Backed by Lincoln Institute of Better Jobs in Electricity,’ and full particulars of your Technology § course ir practical electricity, your free outfit and your free 1 i 1 I I ! I outs, M0 [ FREE— FREE OUTFIT COUPON S & H ENGINEERING CO., Chief Engineer Smith, Division of Lincoln Institute of Technology Dept. F-1, 1422 W. Monroe St., Chicago, Illinois. employment service offer I am not obligated in any way system of teaching electricity has proved so suc- it has been highly recommended and endorsed oln Institute of Technology. When you enroll Name t you are backed by this institution. You receiv: ment Service and Expert Advisory Service as long l I l FREE OUTFIT 7 | such a call for men that we are giving free, an tive age if under 18 ma itfit for experimental and practical home use i ET

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POPULAR MECHANICS ADVERTISING SECTION Are You the Boss - or Are You Riley$ takes them and does what he is told. Both started the same, had equal ability to begin with. Riley works harder than the BOSS and gets less money. What is the answer? Training did it. Your brain is an en- gine that needs fuel. Study and training supply the fuel that makes it go. And when you mix brains with your work you SIMPLY CANNOT HELP BUT GET AHEAD. Tak BOSS gives the orders—Riley Be a Contractor or Builder Fit yourself for a big job in the Contracting or Building business. Train for it right at home. The Course is easy to learn, is simple but thorough, is taught by experts who have made it their life study. We teach you Estimating, Blue Print Reading, Building Regulation, Use of Steel Square, Water Supply and Drainage, Heating and Ventilating, etc. The cost is low, terms easy, results quick and sure. Our money-back guarantee insures satis- faction. Thousands are earning BIG MONEY in this business today. Get ready to get yours. Fill out the coupon now. Check the Course you are interested in. It costs you nothing but a 2c stamp for full information. It will mean much for your future. American School Dept. ©OA.S. G-A74 A ~ 1923 Drexel Ave. ; r. & 58th St. CHICAGO “Riley -Take up These Bricks” ‘All Right Boss” SD EE GED as Gn a Ge ee a a a en ean aay | AMERICAN SCHOOL, Dept. G-A74, Drexel Ave. & 58th St., Chicago Send me full information on the subject checked | Name ! Addre | J Occur Architect Building Contractor or Carpenter Automobile Engineer Automobile Repairman Civil Engineer Advertising Manager Business Manager Financial Manager Sales Manager ..Cert. Pub. Accountant Accountant & Auditor Bookkeeper .. Draftsman & Designer Electrical Engineer General Education Personal Analysis ss. mation Business Law .. Lawyer Machine Shop Practice Photoplay Writer Mechanical Engineer Shop Superintendent Employment Manager Steam Engineer Foremanship Sanitary Engineer Surveyor (& Mapping) Telephone Engineer Telegraph Engineer High School Fire Insurance Expert Wireless- Radio Undecided ee $25 tooo] for one drawin om Learn to Draw at Home New Method Makes It Amazingly Easy Trained artists earn from $50 to over $250 a week Tremendous demand right now for good vork Magazines, newspapers, advertisers, printing houses, et: Become an artist through wonderful new easy met! nt home in spare time. Learn Illustrating, Designing an Actual fun learning this way. Individual attentior one of America's most famous artists. Learn to draw big money. "Send for FREE BOOK Just printed—a new book which describes the latest and wonderful opportunities in Commercial Art, and g students—their successes—what they say—actual re; their work—and how many earned big money even w! postcard or letter now WASHINGTON SCHOOL OF ART MUSIC Lessons With Celebrated At Hi om study. Endorsed by P a new method. Long ‘ Writ BE Any Instrument ore ene Organ—and we will send FREE CATALOG. SEND for it NOW! Sicqui Myers Buliding EXTENSION CONSERVATORY Kill the fear of stammering. Re-educatior curate, dependable, worthwhile book 1U STOP STAMMERING.” It hasinspired thousands 109 N. Dearborn, Chicago, ti ant Marvelous Book Sent on this new easy method of learning to draw re Write for this Free Book and details of special fre« Room 306, 1115-15th St. N. W. WASHINGTON, D.C, Lessons specially prepa school now celebrating its 20th Anniversary. Public School Music, Violin, Cornet, Mandolin, Guitar, | Chicago Hlinois widely famed Hatfield Method fully out THE HATFIELD INSTITUTE, You can now learn Taxidermy, the ¥ art of mounting birds, animuls, tanning Learn at . by mail. The free book tells how. Mount your own trophies yrate home and den. Hunters, trappers, nat ur rs, you need taxidermy. Interesting, ‘2 Be big profita. Join our school. 5, nts Success Get our free book without delay. © Send right now today -, Omaha, Neb- LEARN WATCH REPAIRING Be a watchmaker— —— can learn this profitable trade by corres mee in a few weeks in your own home by the DeSelms Chart System. After u complete the course you will know a watch trom ‘A Ato S. You will naow just what the matter to repair one. you graduate you wi be practical watchmaker = repairer and compe- tent ts Pat any position. Positions for our aio Ask for our Free Book. {t explains our system and terms. THE DeSELMS WATCH SCHOOL 23 Perry St ATTICA, INDIANA

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vOPULAR MECHANICS ADVERTISING SECTION FLECTRICI THE BIG PAY TRADE y thereis a wide yortunity for the the man that business thor- Hawkins Elec- les you find formation and , from the Basic to Modern 1 Short Cuts mn EARNE Y EASY SPARE-TIME READING No need to worry about getting a job or holding | areindemand! The way to keep in close touch wit' a job if you havea practical working knowledge | the progress made in electrical work is to consul of electricity. Electricity is the most Important | these Guides daily for study, referenceand review Factor today. This is the Age lof Electricity. | Hawkins Guides wi!! protect you from mistake * Electrical Workers that really know electricity | check leaks, waste and increase yourearning powel ou if HAWKINS ELECTRICAL GUIDES >, Minos 3500 PAGES—4700 PICTURES—S1 A VOLUME—S1 A MONTH—10 VOLUMES NO Know the facts in Electricity. They mean more money and better posi " tion for you. Hawkins Guides tell you all you need to know abou OR ye pe HAVE Electricity. Every important electrical subject covered so you can unde i i, to study and apply. A complete, practical working course, in 10 \ pocket size; flexible covers. Order a set today to look over LEARN ALL ABOUT THESE IMPORTANT POINTS Magnetism — Induction — Experiments— Dy- nator rating Cur namos—Electric Machinery fotors. ~Arma- . tures—Armature Windings—Installing of Dy- namos—Electrical Instrument Testing—Prac- tical Management of Dynamos and Motors Distribution Systems—Wiring—Wiring Dia- ’ grams—Sign Flashers—Storage Batteries 4 any dern Practica Principles of Alternating Currents and Alter- Electricity and Ready Reference Index numbers Not a cent to pay until you see the books. No obligation yuy unless you are satisfied. Send Coupon now toda and get this gre at help! brary and see if it isnot worth $100 to you—you pay $1 a month for ten months or return it ar rans THEO. AUDEL & CO., 72 Fifth Ave., New York City Please submit me for free examination, _ AW KINS : LECTRICAI GUIDE, (Price $1 a number). Ship at on epaid, the i ) numbers If satisfactory , 1 agree to send you $1 within seven days and to further mail you $1 each month until paid. Occupation Employed by Home Address ROPETONCE. cc cece ccccccccccccccsccccescosess ececcsoooceccesencunes 6 T 30

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POPULAR MECHANICS This Man Earns $3500 to “5000 a Year —WORKING WITH A DENTIST— THREE MONTHS’ TRAINING QUALIFIED HIM TO DO IT There are thousands of these positions awaiting trained men in this profitable profession. After just a few months of specialized training hun- dreds of men will have become full-fledged mem- bers of the dignified profession of MECHANICAL DENTISTRY They will have the technical knowledge and skill to enable them to earn several thousand per year. You can be among them. 2500 more Dental Mechanics are needed right now and the Dental Profession is constantly calling for graduates of the four great schools of this institution; salaries from $35 to $45 a week to start, with advancement up to $125 a week. FREE PARTIAL SCHOLARSHIPS In order to meet this urgent demand for the men we train, we are offering for a limited time Free Partial Scholarships. You will want to get in on this exceptional offer—so don't delay. NOW isthe time! JUST COMPARE Compare the unusual opportunities this profitable professional trade offers with what you are now doing—the earnings, the pleasant, dig- nified occupation. Compare also our ability to train you and put you im touch with the right —— unity —our four large, well-equipped schools, over 30 years of experience in this one line, our wide ac- quaintance with the Dental Profession throughout the nation! SEND FOR CATALOG AND SCHOLARSHIP OFFER Describes the field and why the demand. Shows how students “Learn by Doing” actual work through practical, individual instruction day or evening sessions. Shows how you can “Earn while Learning.’ BODEE DENTAL INSTITUTE 136 West 52d Street, NEW YORK PHILADELPHIA BUFFALO BROOKLYN 1305 No. Broad St. 1226 Main St. 15 Flatbush Ave. BODEE DENTAL INSTITUTE: Without obligation to me send me a Free Copy of your catalog and complete details of the Free Partial Scholarship Plan No. 2. LA Teach COMMERCIAL ART Meyer Both fom , the largest Commercial ‘anization in the World offers you an unusual opportunity for practi- cal training, ba upon twenty-three years of This nationally known organizationeach year produ sells to advertisers over 15,000commercial drawings Both instruction is the dinerence between aicc« 1 fact and experimental theory. This well paid profession equal. ly open to menand women. Home study instruction Get Facts.Before You Enroll in Any School Ask the Advertising Manager of the lead- ing newspapersin your city, ar in the United States,;Canada, | or Australia about the Meyer x pany—let them tell you about us our illustrated book telling about the su our students—for one-half the cost of mailing Cents in stamps. MEYER BOTH COMPANY Department of Art Instruction Michigan Ave. at 20th St., Dept. 16 CHICAGO, ILL, Note—To Art and Engraving Firms: Secure practi- cal artists among our graduates. Writeus. SPEAK AND WRITE MASTERLY ENGLISH Wonderful new way to learn English. No rules to learn. No hard study.Grammar,spelling, punctuation and expression, taught in 15 minutes a day—at home. Self-Correcting feature makes it fascinating as a game. Write today for Free Book “How to Speak and Write Masterly English” and 15 minute test which you can take in your own home. The answers are given so that you can tell at once just where you star SHERWIN CODY SCHOOL OF ENGLISH 56 Searle Building ROCHESTER, N.Y LAY THE PIANO Play popular song hits perfect Hum the tune, play it by ear. S« instruction—no teacher require No tedious ding-dong daily pract —just twenty brief, entertaini: lessons which you master at ho in your spare time. BE A JAZZ MUSIC MASTER IN 90 DAYS Send for FREE BOOK Learn many styles baee and syncopation—trick endings, fill-ins Niagara School of Music, Dept. 651, Niagara Falls. ¥.! If you etammer attend no Institute till you get my large FREI ‘STAMMERING, Its Origin and The Advanced Natural Met! ment."’ Ask for specialtuition rate and a FREE copy of “The > Magazine,”’ published monthly in the interest of those aff mering, stuttering and other speech impediments. Largest, and most successful school in the world for the cure of stammering 20 years. No sing-song or time-beat. Write today. Millard |! ed Nermal Speech, 2317 Millard Bidg., Milwaukee, Wis. Let the World’s Most Periect Man Shew You the Way te Radiant Health and tnerg) Be physically perfect—develop } of will—overcome disease— Pro! show you how. Send for new ar page book full of extraordinary tures of s imens of perfect Enclose 10 cents to cover wral mailing charges. Grasp this 0; of learning these rare secrets of physically perfect. Do it now CHARLES ATLA 96 Fifth Ave., Suite 427, N ess sand Meyer where ur R t Prot. Chartes Atias Twice pronounced the World's MOST PERFECT Man, re- ceiving two $1000.00 FIRST PRIZES. No other man can claim thas title

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POPULAR MECHANICS ADVERTISING SECTION Banyo Bring You SummerFopularity Learn In This handsome, full size professional tenor banjo is yours It will bring you unexpected joy and popu- larity on your vacation. I want to enroll one inu es thousand new students this month. I want to —_—_—— present one of these wonderful, delightful in struments as a gift to each of one thousand Be aMas a readers of this magazine—and here's why Before becoming a professor and as a lover of music el at) m particularly the tenor banjo, I yearned and yearned for the possession of a genuine professional instru Vacation $ ment, the same kind used by the big successful professionals of the world. Now that I have succeeded J I want to help every music lover that I can attain success 4 SI $7, and this gift offer is made to pave the way for you, and no ‘ ID ff previous musical knowledge is necessary ; Not only do I start you on the way to popularity, success and ff fame by supplying you with an instrument that compares with v/ any used or displayed in your town, but under my personal y supervision you will be given by mail the benefit of my twenty- two years as Director of Glee and Instrumental Clubs of New York 7 University (my name is Harry 8. Six In my course, I don't just send you a lot of printed words and instructions and trust to luck that you will catch on Put me to the test You pay only a few cents a day while you learn to play. 7 earnin30 Minutes With My PictureMethod Arthur Brisbane, the highest paid journalist in the world, ¢ once said that “a single picture is worth a thousand words.” He was right, for it stands to reason, when you take your instrument in hand along with the actual photographs M k of myself in action as a e your guide, it 1s easy to . imitate and do the right Big thing. But that’s not all rere Phonograph Recordsfree newe teres I also furnish, as an additional guide, phono- chats tae ha graphic records of my own playing of the piece and are mak- you are learning, along with my thorough, printed and illustrated ing money easy-to-read course. Doesn't that sound easy? It is easy. }If you They have could sit at my desk and see the letters and telegrams from m) com Dp leted pupils, you would be convinced that I have perfected the simplest, their lessons yet most highly efficient course to insure your mastering the tenor banjo OO mye or Ib The Joy of svete! | Dont Senda SingleCent |'z ra wm <= nets et ie © * SP OE, banjoists. You Investigate my offer today. Don't put off until tomorrow be- can dothe cause you might forget and miss this wonderful opportunity It will follow ‘ou same. My les- might be the turning point in your career. Don't send me a single sons are oe cent. Just drop me a line—use coupon fF. — = do , »o ws . esting and you telling me you are interested in receiving full particulars about my mek pA. te . quickly catch course and to reserve one of my regular eighteen dollar, full size, summer. Send to me for on. professional tenor banjos for you, which I have offered asa gift. Act quickly. Wpean,| Particulars about my ns PL] «wonderfully delightful, ba Tories §8=6Calrnbig Money-Kushtoupon tenor banjo pave the way for a real vacation this that yeu. rte = j PROF. HARRY S. SIX, New York Academy of Music, never thought it ¢ ) Studio 16, 212 Fifth Ave., New York, N. Y. possible to en- - : joy. Music has Please rush all inforn .-* relative to your Tenor Banjo Course and reserve a made thousands gift Tenor Banjo for me is obligates me in no way whatever popular and it ean do the -—* same for 44 ¢ you. (

Name

Address

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POPULAR MECHANICS ADVERTISING SECTION BLISS 6 BE IMINO, 7-7 TRAFFIC INSPECTOR Earn Up to $250 Per Month Expenses Paid Position Guaranteed or Money Refunded Ralph E. Becker writes: “I finished my course five months ago, and ten days after re- ceiving my diploma I was given a position with a large railway company in the east, and at present I am working for one of the largest and best equipped electric systems in the country. Traffic inspection offers steady employment and the opportunity to travel all over the country and at the same time be employed in a position where the hours of work are very agreeable.” H. M. Long states: ‘1 want to say for the Standard Business Training Institute that its promises are carried out to the letter and even more. Furthermore, they are always willing to help a man after he has begun working; and for those who do not know, let me say that this means more than they can imagine.” POSITION GUARANTEED Starting at $110 per Month or More Prepare in three months’ spare-time study at home for this fascinating profession. Many oppor- tunities for advancement; many men are needed. Steady, pleasant outdoor work; travel or remain near home. YOU TAKE NO RISK After completing course if we do not get you a position paying at least $110.00 a month and expenses, we refund your entire enrollment fee. Cost is moderate. Send coupon today for fuli details Standard Business Training Institute BUFFALO, N. . ii , | Standard Business Training Institute BUFFALO, N. Y. Send me, entirely free, Booklet No. D-63, giving full par- ticulars about course in Railway Traffic Inspection. Name... SOOO OE TEESE OOOH OE EEEESESESEEE HEHE EE EOSE EEE EE EES Btreet.....ccccccccccccccccccccccscccccccccccsccccccsccccccccess CEUP . cccceccccccscccncoocoossoooccooococssoccosocoescessoccecs L A special technical school, with concise but comprehensive course = men with traini: ec rica in demand. For than 30 years thi has been training men of ambition and limited t; the electrical industries. Condensed course in FE + elie - to secure good positions and promotions. Theo; and Practical Electricity. Mathematics and Mec! Drawing. Students construct motors, instal] wiring test electrical machinery. Course with diploma c: In One Year Over 4000 men trai I roof dormitories, ‘ining bal a oorien, for _— _interest- INTERNATIONAL stupiés. Inc. Dept. 119A, 3601 Michigan Ave., Chicago, USA. = on Its use and Gire ” You can be quickly cured if you stammer. Send 10 c« or stamps, for 288 page cloth bound book on Stammer Stuttering. It tells how 1 cured myself after Stammer Soittering for 20 years. BENJAMIN WN. BOGUE 0 Bogue Building, 1147 N. tll. St. . > ee ™~ MAKE MONEY CHALK TALAING. § , PROGRAM OF TRICK DRAWINGS W PROFESSIONAL CARTOONIST SATIS FACTVO CIRCULAR FREE BALDA ART SERVICE, OL OSHr Barna Mon Dhani to show our samples of All-Wool = regular $55.00 values for only $ . Splendid pay. Ask for details. Address dept. 925 GOODWEAR Chicago, /nc. West Adams Street at Peoria, CHICAGO RAISE POULTRY FOR PROFIT We teach you how. Easily learned at home. Our ¢ anteed methods make success certain —indorsed leading Agricultural Colleges. Send | fs DAY for FREE BOO K— ‘How Raise Poultry For Profi National Poultry Institut wet Dept. 312 Washington, D. (

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POPULAR MECHANICS ADVERTISING SECTION What Do You Call : an Opportunity? N MY LIFETIME I have heard many men speak of opportunity. I have read some very fine definitions of this wonder- word. It has been the subject of many splen- did speeches; authors have written abundantly about it in prose and poetry. You have said, ““I wish I had an oppor- tunity.”” But 1 am wondering what you call an oj portunity. Do you—as so manydo— mistakenly associate it with “sood fortune’? or ““good luck’’ ? Suppose tomorrow you heard f a $10,000 position seeking a man. Could you fill it? If so, it would be an opportunity. If not, twould be no opportunity at all so far as you areconcerned. It would be merely a bit of information from which you could not benefit. Opportunity, I believe, is usually a recog- nition of worth. The biggest opportunity that can ever come to you will never be any bigger than your prep- aration — your worth-whileness. you are not worth considering, Oppor- tunity won’t give you a thought. The biggest job of all the big jobs open and filled in the last twenty-four hours would have been al opportunity for you—— —if you had been prepared. And | am not one who believes that Oppor- tunity knocks but once. The hundreds of opportunities which are here to-day will come again tomorrow— —if you are prepared. But you can be sure they will never be found on the door-steps of worthless prospects— men who are not ready. Opportunity seeks and finds only those who have paid the price of preparation. She does not pick men as you pick a number from a lottery ; either does she cover up what she has to offer Her gifts are an open book—yours from which to choose, Pick the thing you want, and get ready for t. Opportunities do not come except as you attract them. LaSalle training offers a sure way to increase your powers of attraction. Just bear in mind that the biggest opportunity that can ever come to you will never be greater than President your preparation. LaSalle Extension University INOUIRY COUP?0N- oor oor LaSalle Extension University The Largest Business Training Institution in the World Dept. 664-R Chicago, Illinois Gentlemen: Send without obliga- tion to me information regarding course indicated below, also copy of your interesting book, ‘*Ten Years’ Promotion in One,”’ OBusiness Management O Modern Business Corre- 0 Modern Salesmanship spondence and Practice OHigher Accountancy O Modern Foremanship OLaw— Degree of LL.B. and Production Methods OTraffic Management GPerecenst and — pote OR il t Manag: + men anagemen — _ » OExpert Bookk2eping OCommercial Law OBusiness English Olndustrial Management OCommercia! Spanish Efficiency OEffective Speaking O Banking and Finance Oc. P. A. Coaching Name Present Position Address

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POPULAR MECHANICS ADVERTISING SECTION LEARN CARTOONING Successful cartoonists carn big salaries. Many of the most popular car- toonists of today learned to draw in their spare time, at home, through the Landon Course of Cartooning and now earn $75 to $200 a week. Four Successful _ Landon Students From One Village Here is the record of four boys —all from Nappanee, Ind 2200 population) —who, afte: taking the Landon Course, won national reputations: Merrill Blosser is now national! famous as creator of Freckles and His Friends."’ Henry Maust’s work appe ars in Saturday Evening Post politan, etc. Francis Parks, following thei advice, is now a cartoonist for the Omaha News. Fred Neher is comic artist with the Universal Feature Co smo The Landon Picture Chart Method of teaching ORIGINAL drawing makes car- tooning easy to learn. Hundreds of sketches like the above explain every step in creating ORIGINAL heads, figures, animals, e*c Write today for Sample Landon Picture Chart, long list of successful Landon students and full information showing possibilities for you. Please state your age. The LANDON SCHOOL, 738 National Building, CLEVELAND, OHIO Cour Queshon;-be it the pronunciation of~ Fascista, the spelling of a puzzling word, the location of Esthonia ; the meaning of soviet, realtor, vitamin,etc., this Supreme Authority-% WEBSTER’S NEW INTERNATIONAL DICTIONARY contains an accurate, final answer, 407-000 Words. 2700 Pages. 6000 Illustrations ; or and India-Paper Editions G. & S: MERRIAM co., Springfield. Mass. Wwe rite fo or specimen pages, prices, etc and REE FE Pocket r Maps per _POPULAR MECHANICS “ THERE'S MONEY INIT” === yoe=LEARN TELEGRAPH Y=ion ee ORSE AND WIRELESS—-— ~ TEA Cc H You RSEL. F™ in haifusual time, at trifling cost. with the wonderful Automatic Trans. mitter, THE OMNIGRAPH. Sends unlimited Morse or Continenta Messages, at any speed, just as an expert operator would. Adopted by U. S. Government, and leading Scnowin*S Solleges and Telegraph OMNIGRAPH MFG. CO., 16-22 Hudson St., NEW YORK if you own a Radio Phone Set—and don’t know the eede-yeu! are missing most of the fun. Learn Watchwork, Jewelrywork | OUR BUREAU OF INFORMATION will answer all que A fine trade commanding a good tions regarding articles appearing in this magazine. Ad and Engraving. salary, and your services arealways | Gress Bureau of Information, Popular Mechanics Mag in demand. Address Horological, | Dept. P, Bradley Institute. PEORIA, ILL., for our latest catalog azine, Chicago. Dhassi Will Tell You FREE Do You Know? Are You Lucky? Send Birth Date Under which Zodiac IN LOVE I have made Astrology Sign you were born? MARRIAGE life’s work and offer n What significance it FRIENDS interesting astrolog has in shaping your INHERITANCE pretations of the Zo life? SUCCESS under which you Send exact name, add exact date of birth in own handwriting and receive your astrological inter} in plain sealed envelope, post paid. A great surprise awaits you. Er to cover cost of this notice and mailing. Address me personally—DHAS* TARA STUDIO, 1133 Broadway, Desk 44-C, NEW YORK RAILWAY POSTAL CLERKS co a $1600 to $2300 Year =o /“hinman Sa ~ Sirs: Send ith 1) Sample R MEN i BOYS 18 UP. of Clerk E sxamination eats Send List of U ent b ust AIL COUPON IMMEDIATELY ca Soy ty A 9B - Ble Steady work. WNolayoffs. Paid Vacations r.) Common education sufficient : TRAVEL—SEE YOUR COUNTRY rf

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POPULAR MECHANICS ADVERTISING SECTION =i YOU CAN PLAY THE oa HAWAIIAN GUITA national al Bust Like the Hawaiians! AY Freckles "Because Our Native Hawaiian 5 Instructors Will Show You How! e Most Popular Mem rber of Your Set. Play “Once in a loon,"«“Raggedy Ann," Y’Linger a While,” “Shanghi _ALL’ the Late Song and Dance — Yo u can one tion_in_ Half an_Hour—and_Harmonious Chords AT, chance to eet I= the swim—to learn to play the most fascinating of all Hawa a Gu tar, just as the Hawaiians do, and im 3 mazingly she d s ie, plain and easy that yo i Sogn a piece your fir > me the ry Thousands of successfu th whi se yu can rr may be you can steely ear N > ei yt m the od ” 3 : BB Expert Hawaiians Teach You to Quickly Mester _ Their Secrets of This Fascinating Music » fr iy coperse K sks, Waher Kolomoku, Frank Fe ble . oe <a See ee Naren ees Roclianae - a ‘yet its mastery by you will ONLY EASY MOTIONS negate Yost nw = - A Real tee tote sshganieut to play just A Complete Conservatory Course! i $1520 20 _" 3 ning quiring the us bee ac nplished is proved bw the ne only Conservatory teaching awaiian Guitar ex tly as played by the H ana 4 me as we ell as urs, "tha at the se - a “ n itar came to nd bes of all We Furnish Everything tudent in this Conserv- eceive “FREE a a handsc me, sweet H litar—vsz alueda t$15.00 y a ede sons ar as 2 care fo -¢ sic, as well as all Steel Pl. ing Bai r. etc. — extra to 44 every- | 100m | , MAIL THIS COUPON NOW! ry Ce yu reeand FREE scoala a Offer! Qr oe —_ ie =——_— — re _—-—_——_— sae ot let another day i jawaiian Conservatory of Music - utenroll yllhngas wade mth in I Dept. 48 233 Broadway, (Woolworth Bidg ), New Yorks nservatory, onceyou learn how les once full deta 52 lessons an ar and easily you can master this b ! FREE ea me tar fier. r This. of : re, doe t ular of all instruments — the ? || cate me in the least, 7 cus n Guitar~Semail the Coupon NOW. PR: a 4 irst ‘Genaiie Conservatory of Music, Inc. ~ ept.48 233 Broadway (Woolworth Bidg.) WN. Y. S 4 ses Under Famous Teachers: TENOR-BANJO L 4! Addres ; ' VIOLIN, ‘BANJO. URULELE sea Unt ere ‘ c a Seance ks Threw SEER ERR EREEEEE a (Please PRINT name and address clearly) t _* , TS by ? . .

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POPULAR MECHANICS ADVERTISING SECTION JDAVAM 3TAVIAQ ii Teach by Mail I can make & good penman ofyo home during spare time, no matt: youlive or how poorly you now M simplified system has shown t} the way to good penmanship dy 2ast twenty-five years —it CAN /ILL do the same for YOU. My beautift illustrated Book “How to Become a Good Penman” FREE!! THOS « »P . . ; / GF / : It contains many beautiful specimens of i penmanship showing what others hav. complished by the Tamblyn Syster testimonials and general informatior | our courses. ur name elegantly writter ; rard if you «€ me stamp for postag

taughiae successfully ax men, Write Today Ac F. W. TAMBLYN “t used to be one of the hands. cape Seeman nnn Luck? Pull? There’s no such thing in business! Training is every- thing. Only three yearsagol had your very job! A. T. S. books put i — an me where I am today! ; ’ : **Take a tip from one who knows, Buy a set of A. T. S. books and / S let them fit you for a big job, asI did. They’re crowded with pay- x ice TKI? bs L Cf raising facts written by noted experts. They are easy to read, too— ENO Ds - el rite for ,0oklet which explains everything in ful Businicas Management S volumes, 2500 pages, well | AMERICAN SCHOOL OF MUSIC, 5 1 Lakeside Bullding, CHICAGC Fire heey and Insurance, 4 volumes, 1500 ————_— pa 600 pictures, Was $30.00 Now 14.80 Aru s Electric ‘ai Engineering, 8 volumes, “3800 pages, 3000 pictures. Was $60,00 Now 29.80 | 29 op orge ing Machine Shop Practice, 6 volumes, 2300 pages, 2500 | pictures, Was $45.00 Now 21.80 Make Your Mind an index from which Steam and Gas E ngineering. 7 volumes, 3300 | you select facts, figures, names, faces. pages, 2500 pictures. Was $52.50 Now 24.80 Develop « ‘ a. eelf -centest Law and Practice — reading c course), 13 volumes overcome basuiuiness, forgetf 6000 pages, illustratec as 650 Now 49.80 . Write today for F 4 Telephony and T elegraphy,4 volumes, 1728 pages, 1 caupratention paw ty ~ 5- 2000 pictures. Was $30.00 Now 14.30 booklet, “How to Remember.” Sanitation eating and Ve ntilating, 4 volumes, 1454 pages. 1400 pictures. Was $30.00 Now 14.80 ; PROF. HENRY DICKSON Drawing, 4 volumes, 1578 pages, 1000 pictures, blue- Dept. 7056 Evanston, Ill. prints, ete. Was $30.00 _Now 14.80 Employment Management and ‘Safety ‘Engl- neering, 7 volumes, 1800 pages, 540 a charts and diagrams, Was @52.50............. 24.80 SE N {> NO MON y Comics, Cartoons. Commercial Newspaper and Magazine I/lust E Pe ~~ = Fashions. Our simple method quickly develops time all or Local Classes. Write for terms and list of succes tudents. Shipped for 7 Days’ Trial ASSOCIATED ART STUDIOS 87-B Flatiron Build ing New Y YOR® You be the judge of these books. Don’tsend us a penny, but mailthe | t coupen, and we'll ae yee ony om you want for7 days’ free a | Learn Expert Au to Pai in t ing tion. Use them a whole wee If you don’t want them, return the . ‘ books at our expense. If you decide to keep them, remit only 62.80 at There is Big Money ms ( the end of the week and $3.00 a month until the balance | is 2 pent. Take refi nishing. Jur Home Stu ourse the step toward bigger pay today. Mail the coupon—N : in Practical Auto Paintin N y t r American Technical Society, Dept. XA-19 Chicago, U. S. A. ; on Weetetd « re - = Se eee eee [ames American Technical Society, money-making busit Dept. XA-19 Chicago. U. S. A. FREE circular tells al! at é | ' business. Be fi

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Oi /ty JAN im ws CHICAGO COLLEGE OF AUTO PAINTING Dept. 64, 140 S. Dearborn St., CH! GO, U.S 2 Please send me Bet Of .......00-..cccccsesseereeeceesnreneees

for 7 DAYS’ examination, shipping “charges. ‘collect “1 will examine the books thoroughly and, if satisfied, will send @2.80 arnt | NY CARDS within 7 days and 63.00 each month until I have paid the special ¢ 10 price of If I decide not to keep the books I will return {0 } Big field—un- them at your expense at the end of one week. Title not to pass ant limited posstbilities— to me until the set is fully paid for. increasing demand for men with creative ideas. Our course de- velope ability and originality, Work in- EARP interestin, RN $25 TO $75 WEEKLY Address..... ovecscccoseass . <_... ean doit = ambitious. Successful graduates everywhere. Our course thoroughly covers every phase of work. Our graduates command big salaries. Write for catalog, samples, cuarantee and Free Outfit Offer. Detroit Schoo! of Lettering, 626 D. S. L. Bldg., Detroit, Mich. Employed by -_ wastainidnabenninialtesais panmpacetiininnsit (Please fi'l out all three lines) — ee ec er ne

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YOUR DWN OME injo, etc. :, CHIC AGC Stude K NEW VOR ating Course ) PAINTING GO,U.S.A POPULAR MECHANICS ADVERTISING SECTION 29 these handy pocket is a modern, progres- rated course covering field of Modern Engi- nd Mechanical Prac- field is broad and big. To earn more—learn more. AUDEL'S ENGINEERS & MECHANICS GUIDES In Av: del’s Master Set for Engineers and Mech: anice is found progressive numbers; 8 trade illustrations; 50 ps 8 irse for study and reference work. Valuable to Flexib le binding, gilt edge, pocket size Fre examinati I lectricians, Mechanics and students Right No obligation to buy unless satisfied AUDEL’S GUIDES INCREASE PAY QUESTION AND ANSWER METHOD tesa Practical Sets for Guides conta Men rT Study Tits Brief Table of Con- 2 recorders—Characterist i of t an the later + ~ The A "They - tents: rheor Practice and Opera- ier Materials—Constructi f a! for a practical ma L. M. Cowar tion of ALL Steam Engines, Valve 4!! types - > = ~ ATI 27 ‘ S 1 ome , I Soller Constr tior Helps to Higher Position Motions VALVE ETTING: cor Me ical Stokers—Oll I started in as tive fireman but with plete information on All engines and tting te “ the help { Aude > Enginewrsand | Mect pumps—CORLISS ENGINES and + HOW TO Guides I soon expect to be able t i the Theor Construction and Opera- ; 1k ; . higher position and intend t« OLLER—Complete instruc higher el conse tion of all Steam Engines, including drawings on BOILER DESIGN base T. A. Peli Ad UNIFLOW and POPPET VALVI t 1. 5S. M. I BOILER COD! Marous, Wash. = oNGINES, and LOCOMOBILES OPERATION, Including installatio Locomotive-Maring engines lur- FIRING i nd repait of St ry Engines—the Indicator- Boil pe gs and P PRACTICAI MAN- in Lin and “Ventilat How to use Indicator frigerat Cooling Towe OLL, SEMI- an er r i I Appar at t DIkSEI ENGINES Aer r r sand He ne = "bee . it thor es and Aviation—HOW TO SI é topes and Cables Sp ec A Ue t mbines th p ENGINI working in lectr wiring in ALL branche Ne structions, drawings on STEAM EN- pel im of practical electric Chicage GINE DESIGN, including rules and neeri in aid for engines Four Weeks formulac Theory and Constructior ect i n obtaining a lice Study Did it of ALL Steam Boilers; Heat-Combus pt ready reference inde tion; Fuel and Flue Gas Analysis ring entire field of Modern Electrix tion with s high per centage Any man, no eg Rens - Not a cont to pay until you see vanful, after studying be oks obligation to pay unless Kee are satisfied. Send coupon now—today = Worth $50 a Vol. and get this new master set for enginee: ow that in order to know he value of your books one must PAY ON LY $1 A MONTH own them. I would not sell my books for $50 apiece, if I could not buy another. S.C_Pinnell, Tennant, Cal. seaseeeeeeseeecece SSS SSS SEESS ESSE SESS ese eee Eeee behets ey THEO. AUDEL & CO., 72 Fifth Ave., New York City ~ Fifteen minutes study a Please submit yy AOR, nation, Al os PR ag — . . 4 — day will increase your ; : ; pay. Spare time to t 2.00 If satisfactory, | ser to send ye 31 within seven days reading brings and to ther mail you $1 each month until paid. cash returns. yed by Home Address Reference

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POPULAR MECHANICS oa Se a a An Easy Way to Learn PHARMACY AT HOME Graduate pharmacists The work is interesting and pleasant and sala- ries are good. Many young men open drug stores of their own and become independent There’s an easy way to learn pharmacy right in your own home in spare time, without losing a day or a dollar from your present work The International Correspondence course in Pharmacy supplies the knowledge which it will be necessary for you to have in order that you may pass your State 3oard Examination Just mark and mail the coupon printed below to the International Correspondence S« Box 5608-D Scranton, Pa., and full particulars about the Pharmacy Course or any other work of your choice will come speeding to you by return mai! are always in demand Schools ‘hools INTERNATIONAL CORRESPONDENCE SCHOOLS Box 5608-D. Scranton, Penna. Without cost or obligation, please send me full information about the subject before which I have marked an X in the list below: TECHNICAL AND INDUSTRIAL COURSES PHARMACY Civil I ineer she mistry f ind Mapping ( man or Engineer rineer Operating C) Airplane Engines nd Poultry itics Engineering Wirel less Architect Contractor and Builder Architectural Draftsman ‘oncrete Builder Machine Shop Practice iral Engineer Rallroad Positions lumbing and Heating BUSINESS TRAINING COURSES Business Management 0 Industrial Management {] Advertising | Organization { } Better Letters Traftic Management [ }Foreign Trade Business Law | |Stenography and Typing Banking and Banking Law [} Business English Accountancy (including C.P.A.) ) Civil Service } Nicholson Cost Accounting Railway Mail Clerk Bookkeeping Common School Subjects Private Secretary } High School Subjects Business Spanish OFrench LIllustrating C) Cartooning ical Engineer ical Draftsman FE E ‘ _] Mecha: N N Salesmanship Person: Name Street Address City Occupation Personas residing in Canada should send this coupon to the Interna- Sonal Correspondence Schools Canadian, Limited, Montreal, Canadg ADVERTISING SECTION LEARN BY DOING = Every phase of all bran ELECTRICITY taught by Actual Practice In America’s foremost and oldest institutior for trade training No Books Used Individual Instruction Start Any Day Write for FREE 64-page catalog THE NEW YORK ELECTRICAL SCHOOL 44 West 17th St, New York City E AN ARTIST WE CAN TEACH “ YOU DRAWING in your own home during your spare time. Twenty-five years of succeseful teaching proves our abil- ity. Artists receive large salaries Write Today for Art Year Book SCHODL“APPLED ART ROOM NO. 2 _BATTLECREEK MICH. This Interesting Free Book shows how you can become ash of piano oF organ at quarter us shows why one lesson witt worth a dozen other lessons famous Written Method ine tude many important modern improvements in teaching music. Bring = right the great advantage of conserv: atory study. Forthe beginner or exper Highly endorsed, Successful graduates everywhere. Scientifi stand. Fully illustrated. All music free. Diploma granted. Write t Quinn Conservatory, Studio P.M.86, 598 Columbia Road, your home yf ee book Boston, 25, Mass Wonderful, new device, guides your hand; corrects your WF a infew days. Big provement } in be hours. No rw? 4 plete outline FREE. Vrite C Osment, D-34, St REPAIRING You can learn by our modern and orig sf instruction every part of the Watch Repairing Trade at home as good or better than at You can earn money while learning 4 well paying position or start in | pleting our course of instruction repairers are always in $30 to $70 per week. For parti ar Wisconsin School of Watch Rep» 166 Mason St., MILWAUKEE, W'S Lean WATCH i isines' demand ring

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POPULAR MECHANICS ADVERTISING SECTION e Drafting EXPERT Planskverything ul) S se ull (Sila YY

/ SHIP YARDS tiagienee Al ui 2g ‘ 4 seCdCSicO theca” , RAIL ROADS ded (© -

I MACHINERY AUTOMOBILES Ei! A Xx es | Ro 7 ene ~N CATRAINED = <ceee!) TING p < 4 wa —

With My Training You ° Can Earn $200 to $400 a Month! ||} Don’t sell your time for a penny less than $50 to $100 a week. don't need to if you take my training. You don’t need to put up | hard work, long hours and small pay ONE MINUTE LONGER. | prove to you under bond, guarantee that after only a few months’ { spare time practice, you too, can win success as a Drafting Expert! I Train You AT HOME! ll enjoy life as a Drafting Expert. t hours, big pay, fascinating, original, work really like play. Close contact with the BOSS, with BIG MEN. Always in line for executive positions, for pro- motion. FREE! ovrris The same “professional in- struments” an‘ outfit I use myself. You'll use them later when employed as a | high-priced Drafting Expert. train you with actual Drafting room jobs so you can earn top-salaries in any Drafting office. Big Demand for Coyne-Trained Experts Business is booming. Factor- ies, U.S. Government, states, coun- ties, cilies, ALL need Drafting Experts. spare pares you quick for your choice of a thousand won- derful opportunities. Coupon Brings Drafting Book FREE! As Chief Draftsman of this bigschool I know what train ing you need to succeed and I give it to you. antee you will sucs refund your money, no matter what your age, no matter what your education I guar eed or to railroads, ship yards, My time home-training pre- eT ¢ GE em Chief Draftsman, . Coyne School of Drafting Dept. A 19, 1 to 9 S. Ashland Ave., Please reserve Free Drafting Outht for me. and send me your big Drafting book Free. Tell me about t t tunities for the Coyne ained Draft- Chicago the oppor- Na { A ( Free instruments and special offer right now Mail coupon S'a for my big Drafting Book it’s free en eS a Chief Draftsman, Coyne School of Draf Re Dept. A 19,1 to 9 S. Reatens Ave., CHICAGO, ILLINOIS

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POPULAR MECHANICS ADVERTISING SECTION we us oe: Quick cess in Aviation Fascinating — Daring—Big Paying To young men of daring, no other field of work will offer such a fascination, such high pay, nor such opportunities for quick success as the field of Aviation. As yet, aviation is practically in its in- fancy. NOW is the time to get in. Amazing Opportunities in Airplane Industries In the automobile industry and in the moving picture business hundreds of men got rich by getting in at the start. They made their success before others woke up. Today, these lines offer no greater opportunities than a hundred and one others. BUT AVIATION IS NEW. Get in while the opportunity is big. All over the country there will be a clamor for trained men. It ——— will not be a question ff * q of pay, but of get- ting capable men. HERE ARE REAL POSITIONS, $50 TO $150 PER WEEK Aeronautical Instructor, Aeronautical Engineer, Aero- nautical Contractor, Airplane Repairman, Airplane Mechanician, Airplane Inspector, Airplane Salesman, Airplane Assembler, Airplane Builder. View in AMERICAN SCHOOL OF AVIATION 3601 Michigen Ave., Dept. 119A, Chicago, II. | your Free Book, ‘Opportunities in the Air thout ary obligation, send me ourse in Practical Aeronautics | plane Industry,*’ also information about your ¢ Name. Street City A Sure and Easy Way to Learn Aviation—at Home The study tion is almost cinating as the : work. Every] full of inter is why it is learn aviatior do not hav | har Pee vourself stu A New Job—The Aerial Postman iin | genie teresting book that tells you things always wanted to know. Only one + i evening will give you the basic trai surprisingly short time. You need only school education. One of my stu- dents, James Powers, Pa., says, “Iam indeed surprised that such a valuable Course can be had from such } practical men for ai so little cost.” A New Seven-Passenger Airplane Personal Instruction by Experienced Men Men who have had actual experience give y attention. They select the lessons, lectures, blu bulletins. They tell you things that are essential 1 practice. Each lesson is easy to read and unde! Big Book of Opportunities FREE Send coupon at left for New Book, just out, “O} in the Airplane Industry.” It és interesting and It will show you many things you never knew be aviation. Due to shortage of paper we could get or supply of these books—send the coupon before they AMERICAN SCHOOL OF AVIATION 3601 Michigan Ave., Dept. 119A Chicago, HL Sr>y Sverre ize 7

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rplane POPULAR MECHANICS ADVERTISING SECTION 33 lassiied 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 18th. ADVERTISING AGENCIES agents or salesmen or for selling reaching investors, use classified in largest newspapers and maga- e list No. 30 sent free. Ankrum Agency, 20 W. Jackson Blvd, The largest classified advertis- in the U. 8 Rural Weeklies $14.20. 4112-M Hartford, St. WORDS—35! Agency, FOR ADVERTISERS Personally! Mail-order buy- National List, Spring- ADVERTISE s, $2 thousand. nature Dy- letters written. folding. Tell us 682 Pickering lists of every er-getting sales ng, addressing, Gordon Company, nnati splay 100 Magazines, Alaska, St. Louis letters, folders, booklets, com- ip for manufacturers, mail-order Long experience Write for details. . 9 tox C44, Freeport, Il ¥ INTE i NATIONALIZE Your Business! é Buy! Everything! Every- ertisements: $1.00 inch; le word roughout the World! Subscrip- x Months 25ce; Copy 10 Special Advertising Offer! (Positively good June 10th, 1924!) One-Fourth, 6” Ad.—Only $2.00! 3,000 to 5,000 i guaranteed. International-Oppor- ! Brookings, S. Dak “ADVI RTISE in 24 Big Sunday Newspa- 24 words $15.00. Catalog listing 1,000 ng Dailies, Weeklies, Magazines, 4c Union Advertising, Baltimore Bldg., Thrice, $8. WRITE tTISE, hundred magazines, rd. Pennell-Company, three is- Covington, SALES PROMOTION been writing les letters, jaranteed, innati SIX Weeks Sales, Equaling best sar’s sales, followed my plans with- ths. Within four years a million largely the result of my direct- $50 to $50,000 daily sales de- clients Submit sales problems preliminary diagnosis Ten years tion Manager Larkin Co. James 118A Woodbridge Ave., Buffalo FORCEFUL, Effective, Business- getting Letters, prepared in typewritten form. Covers practic ally every kind of business; $5.00 prepaid Particulars free. J. Rodgers Hoggard Ww indsor, N AUTOMOBILE SUPPLIES NEW Electric Light Oil Gauge for Ford, hevrolet and Nash cars Price $3.50 post- : lectric Light Oil Gauge Company, HAVE order- ing Satis- Pickering dynamic, twenty years Gordon, 682 i WORLD War Prope f for Ceiling Fans th Machinery Co., Souvenirs New Only $ Box 153, Airplane Cost Hous- re Vulcanizing Equipment. If idle equipment we turn it into u If you want to buy we save % Write, Equipment Exchange, Los Angeles |. Auto Engine, 20 H. P.. with nerator and Magneto A bargain Fox Auto Parts Co., 57 E. 26th lcago, Ill af ARAGES and Service Stations- Give real f e to your customers. Put a Phoenix ) Tire Inflator on your air line— saves gauges—saves pliers and ¢ Send for prices and circular. Products Company, Box 1268, Phoe- wholesale. Bearings, Fictens, * and rings, Ignition parts, Valves, ve make, model and year of car. Car Parts Co., 331-333 Main St., Green, Ky, AIR Compressors, inder, Guaranteed Air service increases Automatic, Twin Cyl- Easy payments, Free business and profits, Particulars free. Hobartsco, Troy, Ohio. AUTOMOBILE parts for all cars. Lowest prices. Save money; get our wholesale cat- alogue. State make of car, model and parts wanted. Parts shipped immediately from stock. We refund your money if not satisfied. Mechanics Gear Co., 3706 No. Halsted St., Chicago. ~ REPAIRING Ford € ars, Trucks and Trac- tors in the most proper and efficient way is explained in a new 229-page book by the former director of the Ford Motor Co. Serv- ice School. This information is otherwise un- available outside the Ford plant. Written more especially for the mechanic and repair- man. Price $2 postpaid. Popular Mechanics Book Dept., 206 E. Ontario St., Chicago. _ PATENTED Instrument Removes Carbon from Running Motor—Increases Mileage 15- 50% Tremenc jously Profitable. Exclusive Territory. “Workers’’ Communicate, ‘‘Wiz- ard,”’ Rochester, N. Y. PRONTO Series Gap Spark plugs. Guar- anteed Life of Motor and to shoot through oil. 100% Government test Particulars gladly furnished. Pronto Mfg. Co., Council Bluffs, Iowa FORD $4.95 Ohio a PUT ‘‘Reddy’’ to work 32-page illus- trated book—how to make or repair 101 arti- cles of rubber for automobile, home or camp— using old automobile inner tubes. Complete with large Reddy rubber repair kit for $1.00. Reddy Rubber Co., 149b Marvin, Akron, Ohio. RAYFIELD Carbureto. Sales and Service, 2941 Washington Bly Chicago, Ill Have your carburetor built new_and get more mileage, better pic Material and workmanship guarantec one year 60% OFF on used parts for Buick 4 and 6, Chevrolet, Studebaker 4 and 6, Hup, Dodge, Nash, Mitchell, Reo ‘15, ete Guaranteed good condition Economy Car Parts Co., 331-333 Main St Bowling Green, BARGAINS—Guaranteed Radiators—Dodge $19.95, Maxwell, $21.50, Chevrolet 4-90 $16.95, and many others State make and model required. Sport Bodies built to or- der; send sketch. Independent Radiator Co., 1119 Wabash Ave., Chicago, Ill WE'VE Got Everything in New and Used Auto Parts, Accessories and Supplies, for all makes and models of cars. Engines, Trans- missions, Clutches, Axles, Wheels, Rims, Tires, Radiators, Gears, Axle Shafts, Bear- ings, Magnetos, Starters, Generators, Coils, Batteries, Etc., Ete. Ours is the largest stock of its kind in the world. Our Motto is “Service, Quality, and Low Price.”’ Write for catalog and bargain lists. Warshawsky & Company, Inc., World’s Largest Car Wreck- ers and Replacement Parts House, Phone Calumet 7315, 1915-35 S. State St., Chicago, It. No Branches AUTO and Truck Parts Save 25-80%. New and used motors, gears, axles, bearings, springs, generators, $10 up New Zenith, Johnson, Rayfield, Stromberg carburetors, $7.50 up; new waterproof Simms and Ber- ling magnetos, $15; Ford retopping, $4-$6; other cars, $12 up. Brightman Auto ° Ex- change, 321 Windsor Ave., Hartford, Conn. AUTOMOBILE Parts—Used parts for most any car at half factory list prices. Allen, Briscoe, Buick, Cadillac, Chalmers, Chevrolet, Dodge, Dort, Grant, Hudson, Hupmobile, Oakland, Overland, Oidsmobile, Reo, Studebaker and many others Send list of parts wanted. Maxwell Bros., 4106 Olive St., St. Louis, Mo. BATTERY recharging pays “$100 to $400 monthly with new Eight Hour Charging System. Easy monthly terms let outfit pay for itself. Thirty day’s trial, money back guarantee. Particulars free. Hobarts, Troy, Ohio. Touring Top and Delivered Curtain Springfield, Back Vanderpool’s, AUTOMOBILES WHAT do you need? Auto Parts Company, Pittsburgh, Pa Gray's We have it 2 Road, Bright | | PATENTS—M P Laughlin—Engineer- Attorneys 47 West 42d St., New York AUTOMOBILE Owner’ s Handbook con- taining 286 ideas for making your car longer lived and more comfortable. Also tells to make emergency repairs on the road illustrations 50 cents You should have Automobile Tourist’s Handbook whicl has dozens of ideas on auto camping an touring 50 cents Both books for Popular Mechanics Press, Room 806, Popular Mechanics Building, Chicago, Ill PATENTS Procured Send sketch or model today for examination, prompt report and advice. No charge for preliminary ad vice. Write for free Booklet and blank form on which to disclose your idea. Highest references Promptness assured Clarence A. O’Brien, Registered Patent Lawyer, Security Bank Building. Directly acros street from Patent Office, Washington, D See pages 150 and 151. RACING Bodies for Fords and Chevrolets 490. Send for free particulars. Our book “How to Build a Ford Racer’ sent on re- ceipt of 25c. Central Auto Supply Company, Dept. 120-C, Louisville, Ky PATENTS—Write for our Guide Books ar ‘Record of Invention Blank’’ before disclosing inventions. Send model, or sketch and de- scription of your invention for our free Examination and _ Instructions. Highest references. Reasonable terms See aciver- tisement on pages 152 and 153 Victor J Evans & Co., 185 Ninth, Washington, D. DYKE’S Automobile Encyclopedia Litt edition, new, greater than ever, entirely re written and rearranged Contains greatest array of automobile facts ever published i one volume. Separate books containing same information cost $21 Over 1200 pages ani 4100 illus. Cloth $6. Flex. Ame.. Morocco $7.50 postpaid. Popular Mechanics Book Dept., 206 E. Ontario St.. Chicago FOR FORD OWNERS TWO-DOOR Ford Sedan beds $5.50 Par ticulars. Milligan & Chrey, Bremerto Wash FORD Repair Book Free A very co and well illustrated book explaining how to make repairs on most every part of your Ford We offer this book free with a nine mont subscription to Ford Owner and Dealer Magazine—at only $1.00 Everyone inter- ested in the Ford car should read this t magazine of about 200 pages monthly clearly explains the things you want to know about cutting down the cost of operation, the engine, ignition, transmission, carburetor, et Send Today and get the valuable Repair Book Free. Ford Owner and Dealer Magazine, 542 Montgomery Bidg., Milwaukee, Wis LINCOLNETTES—‘‘Four Miles More Per Gallon.”’ Valuable Information *“Free.”” “‘Wizard,”” Rochester, N. ¥ SPORT and Speedster built to order ¢ 16.00 and up Write for particulars. Keller Auto Body Co., Ine, pest. 42, 317 W. Winkler Ave., Louisville, AY iplete Bodies for Fords FORD Propelled boats always go trated Ford Boat Booklet sent free Rider, 206B Commercial Bldg., Conn AVOID ‘“‘turning turtle leaving the road locking over center You can steer safely and easily out of ruts, through mud, sand snow and on center-crowned roads, with a Sprague Worm Steering Gear on your Ford Same type as used on all larger cars Pre vents bumps in road from turning front wheels aside; gives you control of steering Also absorbs shock, vibration and strair on arms and shoulders Makes a far better and safer car. Easily, quickly installed: no holes to bore; outlasts car Guaranteed to satisfy you. Write for particulars. Sprague Tire Co., Dept. 2, Omaha, Neb GASOLINE Economy for Fords made certain by installing the famous Auriliary Gasoline System. Better than a Vacuum at a mere fraction of the cost. Warm gasoline improves ignition and saves fuel. Uniform gasoline pressure to carburetor at all times no grades too steep. Carries additional gase- line for an emergency Easily installed Send $3.50 for outfit complete prepaid Absolute and positive guarantee 4 A Products Company, Mfrs., Department A, Denver, Colo.

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34 POPULAR MECHANICS ADVERTISING SECTION UNDERSLING with “RKO” Swing Lo , TEN lessons in the air, of twenty minutes PICTURES AND Pos Irons See Red-i-Kut"’ ad page i61 each, will make you a pilot, by our ad- 1OIN Li 7 ; OSTCARDS o " ’ " Me R113. your owt o & ian oune @ vanced method of training. This, together se eave osteard Clu M er : . . 7" e te Ps catur, a¢ blue printed specifications and particulars. | ™#kes America’s oldest aircraft factory the JOIN 1 =. MM Mevier, ® 10. Katamesce Sich nost popular flying school. Work after N International Posteard ( = : class hours guaranteed. Heath Airplane Co., Membership Hobby Magazin WIPE Ti ae a Replaces ae in Chicago, Ill =. “*‘Universal,”” 1034P any standar For imer Smooths out " - ; a he Chicago roller worn timer shells. Positive contact— THE American School of Aviation an- | — T = t - ’ , . nounces a new correspondence course in ART Corner your Postcar strong steady spark—uses no oil or grease. Mechanies of Aviatio ~ ered Clippings into albun - The high grade carbon steel lip, or wearing “ee ag oes a oe Fe PR ny witl surface, is harder than glass develops 24 ing in ’ P ractical Aeronautics. | > American ge ~ permanently mi yo more volts than any ordinary Ford Timer. School of Aviation, Dept. 1865, 3601 Michi- peste neodes . Neater and ms 5 _ gan Ave., Chicago, 111 than the old-fashioned meth Helps keep spark plugs clean. Eliminates ° you Send a dime for pack much carbon and coil trouble. More power, te A gegge RE ee more pep, better pick-up, and instant start- BOOKS AND PERIODICALS Clatk. c _—— Art Corners C ing. Sent Prepaid for $.75. Fully guaran- I. C. 8S. HANDBOOKS, $1 each, 24 titles; aR teed. Order one today 4 A Products Co., Home Study Handbooks, 90 titles; description JOIN the Old ‘Reliable Card Clu Me Mfrs., Department A, Denver, Colo. free. ‘“‘Cartoons Magazine’ and ‘“‘American bership, 10c. Riverside Club, Fre lerick, Md mize: BRINGS Catalocve—3.00o Bargains | AT, Stydent( auppie ther, Ste:oth NOVELTIES, CURIOS, ETC es, Accessories, adio Supplies. jill re- ) hes om pe r fund money on first order. Jones Motor Com- I unbar. Dorche tor _Lonter, Mavs . MEXICAN Novelties, Purses, Hy, pany, Dept. P, Bowling Green, Ky. on oo aa 4 $1 ~% New 0 ~ ather Goods. Noveltic B : . 8 55 4 ew rleans Eee | Weskehd “hams ons coeck ste Tee | , een Tepes TOMS. a OVERSTOCKED—200 Used Motorcycles. | ular Institute, K1014 Belmont, Chicago Art Novelty Co., 599 Ghio St., Li Must be sold at once. We have Harley-Da- SUGGESTION and Autosuggestion (Emil | ,°HINESE Embroidered Shaw vidsons, Indians, Hendersons, Excelsiors, Coue) 35c—Dr. Braid’s Wonderful Method Articles, Mahjong Sets are obtainable Clevelands Write for our Bargain List. of Hypnotising. $1.10; “The Way to Win” us at Manufacturers’ Prices Purcha Myerow Brothers, Dept. B. 15 Berkeley St., | joc. Baker Specialty Co., P4213 Carroll | @veTy description undertaken. Address Boston, Mass Ave.. Chicago ™ 5% ——— Supply Company, Post SEND for our “Bargain Bulletin and Money cs ELECTRICIANS—aid to examination for Hongkong, = Saving Message. It will save you money on license; illustrations, diagrams, tables, ete. : SOUVENIR Moonshine Stills $1.25 P Motorcycles Side Cars, Motor Wheels, Repair price $1.25. Marine and Stationary Engin- paid. Money Refunded if Dissatisfied Ps yy rm - ae ries. Some used parts at eers—latest answers to questions asked at | Sales Co sox 831, Asheville, N. C — neor leveland and Ace Motor- | examinations; profusely illustrated. Price BOOKS, Antiques, Curios, ete. Par cycles our specialty. See our ad on page 142. $2.50. Ste: Boile onstruct one a Fre O. W. Miller, 278X Warre . American Motor Cycle Co., 2043-5-7 W. eemtien: 146 "Gententhon og aaa ng a York ’ : : at a Chicago Ave., Chicago p ae . ms; complete % men = ——h - valuable information; price $2.50. Catechism MOTORCYCLE Riders make big money | of Steam, Gas and Electric Engineering, over | GAMES, ENTERTAINMENTS AND PLAys Demonstrating and Selling Internationally 1,000 questions and answers; price $2. All = - Famous Fixible Sidecars and other products books written in simple concise English by ex LEARN 1e art of Ventriloqui 5 in open territories. Special Diseount on Dem- | expert authorities. Reade Pub. Co., 296 | .eo {or iP ———-. aoe yee onstrating car and liberal Commissions on | Broadway, New York. : er 696 Henri Julien Ave., Montreal, Que Bales. Fixible Co., 328 Water Street, Loud- VENTRILOQUISM taught al onville, Ohio. PERSONAL Advancement—The new Maga- at home. Small cost Send for particulars and proof ao ) Room M-865, 125 N. Jeffer Ill zine published by Popular Mechanics Press NEW and used parts for Motorcycles and for all who want to get ahead. Inspiration. Bicycles Get our prices on parts needed. Education. Entertainment. Advice. will Kingshighway Motor Co., 1166 N. Kings- help you to decide upon a vocation, to get highway, St. Louis, Mo. help in preparing yourself for that vocation, 2 = . to get the ‘best books on travel, mechanics, . gif? FH 1ot®, Se8e 1917 $i ° and on related subjects. One year free verde we eed - ree, 4 ~ 4 ae 7, Send your name and address on a postal to ar Mechanics Press, Room . $45; 1915, $40; 1914, $35. Guaranteed. > antes =~" Dp chanics Building, Chicago, Ill Popular Mechanics Press, Room 805, Popular Money refunded if not satisfied. Circular Mechanics Building, Chicago, Il. ' LEARN To Swim—Complet free. Wisconsin Cycle Sales Co., 726 Na- paws —_- 50¢ Mercatus tox 1422, Indiana tional Ave., Milwaukee, VYis WRITERS: Study at home; 30 text books; : 2 SS: = + Fee eee criticism and advice regarding markets for *“ROMAN’S Three New Games” MOTORCYCLE Sidecars—Bargain Prices manuscripts. Catalogue free. Correspondence paid. Roman Arndt, 3689 Townsend on Experimental and Discontinued Models. invited. James Knapp Reeve (former editor | Mich . Weite Fizible Co., 328 Water Street, Loud- — 50 Alexander Bldg., Franklin, 200 KINDS Iron, onville, Ohio nr ort LAR MECHANICS Book Catalog lists books wood and wire | = ar - oe Leader and ilivstrated list 10c —— ne -OPULAR MECHANICS Handbook for Puzzle Works, St. Paul, Minn I gg A Bae —® a Women has 294 ideas for those who keep PL SYS, musical comedies and re . b4 _O., -- bad @ S é § ca ™ ¢ 4 ni PyUES lake, Seattle, Wash. house. 50 cent Home Mechanics contain 329 ideas for making things at home. 50 | strel music, blackface skits, vaudeville DON’T buy a Bicycle Motor Attachment cents. Popular Mechanies Concrete Handbook | Monologs, dialogs, recitations, entertainme until you get our new catalogue and prices. | No. 1 has 173 articles on the use of concrete | Musical readings, stage —— S . Also runs washers, pumps, and shop ma- | 2bout the home, in the shop, and on the farm goods. Big qutaieg free T. 8 De chinery. Shaw Mfg. Co., Dept. 27, Gales- 0 cents. The three books for $1.35. Popu- |) Co.. 623 So. Wabash, Dept. il, Chicag Gers. Kane Mar wigchanics, press. oom | #06, Popular | MAGIC TRICKS, BOOKS, AND JOKERS SEND for big list of slightly used motor- “PERSONAL Susnena.*” Illustrated Cata- NOVELTIES eycles on the easy payment plan. Howard log 4c. Phipps Library, 1014 Belmont, Chi- } MAGIC goods, cards, books, nove Cycle Co., Trenton, N cage : via oy ‘ | sions. Catalog free. C. Fenner, 4 AVIATION “SECRETS and Mysteries of Applied | 20% Louisville, Ky. Psychology.”” One dollar. Dr. Grumbine, MAGIC. Latest thrillers, larg SEND 10c for our latest aeronautical cata- Hotel Winton, Cleveland, Ohio ment, free trick, lists, catalog, 2 . : 334 log listing a complete line of airplane goods > TIC > on. ‘aieetiinen + 334 _S. San_ Pedro, Los Angele at reduced prices; Propeller catalog 4c, Ford PRACTICAL Psychology Teaches Hypno . shin? : , ; tism, Personal Magnetism. Magnetic Healing, LATEST and Best in Mag => . see groan Auto-Suggestion, Cure Habits and Disease Personal Advancement, Popular on c es Chi Da 2.90, eath - tasy Lessons. Send for Booklet, 4 cents new magazine, keeps you posted —. a cago, - . ; . stamps. Fernando, Dept. M, Springfield, — of ny ng ARGAINS—propellers, motors, vubs, Mass. making money W Magic perior eompasees, carburetors, sparkplugs. Thomp- a ees — - for one year. No strings t son, 266 Fairview St., New Britain, Conn. FREE Send fee ay Newthought, i Send your name and address - culture, ult, ystic a lent B chanics Pres ) 805 CLERGET 135 Horse-Power motors com- literature " Martens Publis her, “Burlington - a 7 A “4 Chics ~ Il plete, $90.00. OX5 90 Horse-Power, slightly | Towa ees : = ‘ oo aay oo a8 k sed, $85.00. Stacy S , 3821 DUSTRIU : ; REE, puzzles, tricks, jokes eS Se pe ' =e INDUS TRIAL ~ Alcohol. Wright's book. | Box 496, Covington, Ind — = ull directions for making drawings. $2.50 = » ie AIRPLANES $350 up. Motors 28 to 200 | Spon & Chamberlain, 120 P. M. Liberty sence tea a. a “ HP. Aviators’ Leather Coats, $12.50. Smith Street. New York, N. Y ay , 4% atalog. righ Son Machinery Co., Box 153, Houston, Texas. “LIGHTS, Colors, Tones and Nature's — 4 J) ores — EARN To Fly.” ’ . | Finer Forces,” covering Vibrations; . LARGE Illustrated catalog free “LEAR o Fly. Ten Twenty-Minute y tame Cn tebe alte: tuations? Se Sensational escapes, erystal gazing Lessons, $100. Army Training Plane. Shop 8; G- ents 5 ; sons ; reading effects, card tricks, presti Course Included. Sportplanes, New, Used, | Pages. Satisfaction guaranteed; books, great Illusions, funny joke and Parts. Lowest Prices. Blueprints and Circulars Free. M. Stevens, Publisher, 242 mival goods Write us. Heaney M Instructions: Biplane, $2.50, Monoplane, $1. Powell, San_ Francisco Berlin. Wisconsin. Special Stage Aviation Engineering Co., _ Lawrence, | Kansas. HINDU Psychology, Secret Sciences. catalog, finely illustrated, 2° cent LEARN To Fly with Varney Aircraft Co., Illustrated Catalogue, | lesson 25c. Adaros, 250 MAGIC Tricks 10c. Lowe, } Ae wa qi. Lowest tuition compatible with 116 South Michigan, Chicago. Spokane, Wash afety horoughness, and Efficiency. __ HYPNOTISM easily learned. Lessons —"“ . ‘in, nw =—-- MAGIC—Tricks, Books and Su PATENTS Procured. Send sketch or model “i 3, aes $1. Smith Pub. | amateurs as well as the great prof teday for examination, prompt report and ad- o., Dept. pringfield, Mass. Anyone can learn through our instr vice. No charge for preliminary advice. 176 PRACTICAL Subjects, how to master Feature Acts in Mind Reading. Spirit Write for free Booklet and blank form on any of them. A new booklet giving reliable Rope Ties, ete. Large illustrated Prof which to disclose your idea. Highest refer- advice on how to study 176 subjects at home al Catalog, 20c. Chicago Magic ‘ ences. Promptness assured. Clarence A. is free. Write your name and address on Dearborn St., Dept. B, Chicago, I!! O’Brien, Registered Patent Lawyer, 583 | a postal and say, Send me “An Easy Way | - =e - Pistol $1 Security Bank Building. Directly across the to Master 176 Practical Subjects’’ and mail MAGICTAN’S Nickeled Gilmae street from Patent Office, Washington, D. C. to Ponular Mechanics Press, Room 806, Pop- tricks and four catalogs 20c. Gilmae Bee pages 150 and 151. ular Mechanics Building, Chicago, Ml. gan Park, Chicago

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POPULAR magical appara- ige supplies, mind-reading, spes, large illustrated pro- g, 10c. Oaks Magical Co., Oshkosh, Wis. STAMP COLLECTING Outfit! 250 rules, jokes, Bargain Stamp 50 all diff. stamps. Fiume sa, French Cols. (Pictori- sy (Tiger), ete.; 20 Vars. War and 5 Blank Approval sheets, 36- all for only Mec isking to see my choice 50% ap- aon L. B. Dover (Dept. C), Clayton, Mo. DIFFERENT Czecho-Slovakia free to proval ants. King Stamp Co., 4559 Ave., Chicago, 10, ICE List Free. Midwest Stamp ce Bidg., Kansas City, Mo. TARDING Unperforated—$1.00 U. 5.— Dif? reign, 16¢. Mountain City 5, Mannington, W. Va Fenway Outfit — 2 triangle slbum, 5 blank approval es, perforation gauge, 5 large 2 special deliveries, ani- set, packet 55 different, in- inia, Azores, Cape of Good Crete, Congo, ete. 16-page for 12e to new approval appli- Stamp Co., Fenway Station, pOVE! Sargain List, FOR l2c! 100 different $2.00 Red Cross set, Airplane set, sauge, Millimetre scale, Fine roval sheets, 250 hinges, scarce Abyssinia, etc., price list for 12¢ to approval ap- Stamp Co., Box 532, ~ Newroupe. Nyassa, all Atlanta 1. G DIFF! South American 25c; 99, ; 2 $2. Fred Onken, 630 Brooklyn, _ ew 5 Mes i.uxemburg Stamps given to ap- ing my approval selections at t Reference Required. J. de West 162d St., New York, N. Y. ENCH Colonies: 100 different, postpaid ee | er, Centerville, lowa Boehm, 4 RENT 700 FINEST 401 e-cent approvals. New York + es regain! 24 different scarce Ger- ils 10c; catalog over $2. Penna. nor, Pa dE ets TS. » Stamps, Packet Hinges, Per- ige, 10¢ Quaker City Stamp Rachel, W. Va. Stamp Collection—70 ) different 70 different foreign countries, Asia, Australia, Europe, Our pamphlet which tells ike a collection properly,’’ and albums, packets and sets all for Queen City Stamp Co., Room e St., Cincinnati, O. aay 1.000 MIXED Stamps from Europe, Asia, miy 20 cents. Nielsen, 3244 St Chicago e-cent approvals in 17 So. 60th 8St., America F. Philadeiphia, et 100 different (mostly unused), Ngo, nyeeemeene, San Marino, b for 6c to Approval Ww. irl Ww ide Stamp Co., Phoenix, START Right! Wonderful variegated col- col- National Institute, Springfield, PACKET of 23 stamps, no two countries a. of $1 and $2 ‘ Packet hinges. Set S. Re Miami Stamp ’ all for 5c. P. M. T Ohio 2 UNI SED stamps free All different. ag ». M. Fisk Stamp Co., Toledo, including “*Prisoners hinges, premium, 15c. Marlborough, Mass. _ World’s smallest stamp. Approv- Davenport, ised sets, lifferent, Newton St., FREE! 4 , P tage 2c. Cannon Co., _POREIGN stamps, ve, Box 387, lar Cat, catalogued $10, for Spokane, Wash. Value for 6 Cents. 100 incl Fiume (triangle), set Mail, French Colo., Pictorials P for 6 cents to approval a ‘. Perf -Rauge and price list Free. ) 21 Woodward Ave., Atlanta, Ga. x. STAMPS 5 sent on approval at 70% discount. ‘quired. Emory Renoll, Hanover, TWO D lif? Sta Ds Air . . NIN VE RSAL Packet, 1 100 varieties, all over i te conte. Covert Stamp, 39 State, $1 Applicants. Canada to approval B Greensburg, Ind. Turner, MECHANICS ADVERTISING ANCHER’S $$$ Qutfit—Only 12c! triangle stamp; se. German stamps (pre-war) value forty million dollars (inter- esting!); perforation gauge, mme scesle; small album; 2 approval sheets; airmail set; scarce stamp from smallest republic on earth; newspaper set; packet good stamps from Travancore, Johore, Dutch Indies, etc. Entire outfit for 12c to approval applicants' (Nice pocket stock book, value 25c, with every order!) Ancher Stamp Co., 9% Monticello Ave., ‘jersey City, J. SAVAGES and wild animals. French Colonial stamps, 2c Wicklow Room 116, 122 Florida, Washington, D. C. 100 DIFFE RE NT New Europe Free to approval applicants sending return postage. Anvelink, 2410 Prairie, Milwaukee, Wis wai: We 25 STAMPS cataloging over $1 00—10¢ cataloging over $16.00—- coin. 400 mixed, Glen Ellyn, Ill $1.00. W. Benno, STAMPS on approval— 4c up ‘Free poyeem. Herbert Keigwin, Middletown, MYSTIC’S ‘‘Mysterious”’ tains stamps from Fine with 10 different Packet! Con- the lands of cannibals, heathens, sun worshipers, and wild savages. Included are Travancore, Malay, Dutch In- dies, Liberia, Siam, Africa, Abyssinia, North Borneo, Nyassa, Congo, etc. This wonderful packet containing 110 all different (mostly unused) for only 8 cents to approval appli- cants. Mystic Stamp Co., Dept. 8, Camden, ‘ew York. NYASSA Giraffes ; and packet of 5 ent scarce stamps. Fiume Triangle, large $1.00 U. S. Rev., millimetre scale, perfora- tion gauge and ruler for only %& To intro- duce our Sudden Service approvals. Fennell Stamp Company, Dept. P, Fullerton Bidg., St. Louis, Mo FREE! Loose Leaf Postage Stamp Album at rate of 8 pages each month given with sub- scription to monthly Journal. Send 2c stamp for prospectus. United Stamp Co., Mar- quette Blidg., Chicago, Ill 100 DIFFERENT stamps free to applicants for our Popular Approvals. Postage 2 cents. ee Sycamore Bidg., Milwaukee, 8. 2 differ- 158 GENUINE Foreign Stamps. Merico War Issues. Venezuela, Salvador and India Service. Guatemala, China, etc., only 10c. Finest approval | Sheets 50 to 60%. Agents Wanted. Big 72-p. Lists Free. We Buy Stamps. Estab. 20 years. Hussman Stamp Co., Dept. 54, St. Louis, Mo FREE—Two sets Nyassa, 20 Diff. British Colonies Barbados and Jamaica pictorials and a packet of hinges—all for a request for my 1, 2 and 3c net approvals, none better. Chas. T. Egner, 4821 Frankford Ave., Frank- ford, Phila, Pa. SECTION FRENCH Colonles with nice Morocco set free Georges 4153 Second, Detroit, Mich : FREE—200 different stamps to approval applicants sending 4 cents postage H.W nee & Co., 1018 Florida 8St., Richmond, Call 150 different $1.00, Stamp RARE COINS OLD U. 8. Silver Coins Cheap. Old bust type dimes dated before 1838, 25c. Old half dollars with lettered edge, dated before 1836, 5c; Columbian Half Dollars with bust of Columbus (sold at $1 in 1893), price The. Five foreign coins, 1 over 100 years old, and my large 50 page Illustrated Coin Catalog for only 20c. Our catalog free with any order for above coins. All kinds of Coins and Bills for sale. B. Max Meht, Numismatist, Meh! Bidg., Dept. P, Fort Worth, Texas Lurgest Rare Coin Estab- lisment _in_ the United States TEN Billion German Marks Craig Dare, Patchogue, N. Y. a 100 MIXED foreign copper coins from Holland, France, Russia, Finland, German East Africa, Norway, Denmark, Sweden, Switzerland; all bright new condition: post- geld. 50 cents. Nagy, 33P South 18th Street, Philadelphia FOR Sale—old coins. List—15 cents. Ga 40 OLD coins, fifty cents Large Cent—Price Elery Fleming, Gainesville, all different, $1.00 20 Large U. 8S. Cents, all different dates, $1.25 200 all different German City Bills $1.00 25 different German High Value Bank Notes, 50c. Claud Denney, Box 315, Dallas, Tex “| BILLION German Marks 25c. Nag), South 18th St., Philadelphia 100,000 GERMAN Marks—l0c; $20 Mex- ican Revolutionary Note—l0c; 10 New Foreign Copper Coins and German Bill—25c; Nickel, sc and 2c—l5c; Price Lists and Wild Bill—6e Al E. Bonsall, Richmond, Ind OLD Money Wanted. We paid $2,500.00 for one silver dollar to Mr. Manning of Al- bany, N. Y. We buy all rare coins and pay highest cash premiums Send 4c for large Coin Circular. May mean much profit to you Numismatic Bank, Dept. H, Fort Worth, Texas CALIFORNIA gold, $% size, 27c; $% size, 53c; three-cent-piece and catalogue, 10c. Norman Shultz, Colorado Springs, Colo. OLD Coins Large Spring selling cata- logue of coins for sale, free. Catalogue quoting prices paid for coins, 10c. Wil- liam Hesslein, 101 A Tremont St., Boston, Mass RARE Coins, Medals, States, Foreign and New Catalog 10c Colorado Springs, Paper Money, United Ancient, Villa Coin and Alexis Mengelle, Box 337, Colo 24 VARIETIES Cuban stamps, 10 cents. List of 6,000 low-priced stamps free. Ad- dress Chambers Stamp Co., 111P, Nassau S., New Zeek City, N. Zs STAMPS, 5 50 varieties, ~~ Africa, Brazil, a“ Cuba, Merico, etc., 10c. 50 different U. 5c; gy mixed, 40c; 1,000 hinges, l0c. List’ free. Stegman, 5948 Cote Brilliante, St. “Louis, Mo. _ 7 til 105 CHINA, etc., stamp dictionary, list, 2c. Album (500 illustrations), 3c. Bullard, Sta. A, Boston. 100 RARE Stamps, all different; lists, Stamp Magazine, everything 7c. ton, Niantic, Conn 2,000 DIFFERENT “stamps $1.45; 500, 45c; 300, Calumet, Chicago. STAMPS, 100 all different. — Lists free. P. M. Quaker Toledo, O ae FREE—25 different U. 8S 60% approvals to reliable parties U. 8S. Stamps 25c. C. ‘is. Bargain Stan- 1,000, 5353 $5.35; 25c. Micheal, Postage | 2c. Stamp Co., Stamps with 75 different Seidenberg, Merton, FREE—50 varieties to approval applicants sending 2c. Richard P. Lamprecht, Valpa- raiso, Ind DANZIG Free—Nice Set Danzig with Biggest Lists issued, 2c. postage. Mid- land Stamp Co., Station E2, Toronto, _Canada. FRENCH Colonies Free—Pretty Picture Set, Native Chiefs, Tigers, 2c Postage. Empire Stamp Company, 342 Lippincott, Toronto, Canada. BIG Variety Packet Forelgn | Stamps" Free for 2c postage. Gray Stamp Company, Station E10, Toronto, Canada. _ Co as 30 DIFFERENT Newrope, German Air Mail Set. Free to applicants for my 1, 2, and 3c net approvals; also my high-priced 8 mee at 50% discount. Chas. W. Schmidt, 27 Benner St., Wissinoming, Philadelphia, Stamps FOR BOYS MOUTH-ORGAN in one hour Song Parodies, Instructor, 25c Boxing Instructor, 25« a) 10c. 250 Magic Tricks, to Ford Joke Book, 10c. ‘“‘Ventriloquism,’’ 1% Boy Electrician, 1% Toymaker Book, 1% All for $1.00. G. Elsea, Bowling Green, 19 BUILD Horizontal Engine; Blueprint for Quarter. Coin preferred. South Buffalo pnaine Co., 326 McKinley Pkwy, Buffalo, x *Y ~ FREE- proposition. Ohio CAMERAS AND PHOTO SUPPLIES PHOTOGRAPHIC equipments and accesso- ries of every description are listed and illus- trated in our 178-page catalogue. It will pay you to secure a copy which is issued free, as our prices are low We also deal in used goods which are sold under the same guaran- tee as new goods. Ask for our Bargain Book. Central Camera Co., Dept. E-82, 124 58. Wabash Ave., Chicago, Ilil._ 8x10 ENLARGEMENT from colored and framed for 98c plus surance. Cash with order. Send for circular. Alves Photo Service, Braintree, Mass “ ~~ KODAK Bargains—All sizes and styles. Stiller's, Kodak Specialists, Green Bay, Wis GENUINE 6 or 8 Power Schutz High Grade Prism Binoculars in leather case, limited lot at this astonishing $24.50. A price. Shipped for examination upon receipt of $5.00 deposit Send your order quick Bass Camera Company, 109 N. Dearborn St., Chicago, Ill DOUBLE print Kodak Photo, entirely different, never seen developed, 6 prints for 2 dimes. Co., 10, Cincinnati, Ohio 5 M. & F. QUALITY Prints are backed by photographic experience. Judge us Magazine and selling 944-M Clark, Toledo, -Big Fun Fin- Ko, ~ your film 2e for in- new art style, before Roll Malden Art 35 years’ trial order Marks & Fuller, La 4 by a Dept. B, 45 East Avenue, Rochester, N.

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FILMS Developed Printed Never fade gloss prints. Lightning service Something new. Write for prices. F. R B Photog- raphers, 1503 Lineoin . Ave., Cincinnati, Ohio FILMS devels on d, Prints made Write for Price Lis y. Z. Koscielniak, Box 1361, Detroit. Mich.” YOUR small f $ Size. 10c each Milwaukee, W . 7 CAMERAS, _ telescope, , binocular, cheap; list free Dur 25 Mulberry Y. City ANY Size Oil Painted ee made from your photo, film or kodak picture Write for prices. Otto E. Hueser, 4356 North Lin- coln St., Chicago, Il : i eae KODAK Films—Special trial offer; your mest kodak film developed, 5c—prints, 2c gach. Moser & Son, 1917 St. James Ave., Cincinnati. FILMS Developed. Special Trial Offer. Any Size Kodak film developed 5c, prints 3c each. Trial 6x10 Enlargement in handsome folder 40c. Overnight Service. Roanoke 209 Bell Ave., Roanoke, enlarged to Posteard- _ Kodafin, 387 Belleview Place, Photo Finishing Co., Va FILMS Developed Sc—Prints 3e each. The new Davo finish. Davis Photo Shop, Dept. A, Cincinnati, Ohio t ART Corner your Photo-Prints, Posteards, Clippings into albums with Engel Art Corners permanently or removably. No Paste needed Neater and more convenient than the old-fashioned methods. Let's show you. fend a dime for package of 100 and samples. Engel Art Corners Co., 4707 North Clark, Chicago ee aoa PHOTOGRAPHS taken ) easily without Sims. New discovery. Save money. Nothing to sell Photo and complete instructions thirty cents. W. Witkinson, Clarkson, N. Y. HAVE You a Camera? Write for Free sample of our big magazine, showing how to make better pictures and earn money. American Photography, 116 Camera House, Boston, 17, Mass. SUPERIOR quality finishing and enlarg- tng. Trial offer: Any size 6 exposure roll developed and printed, 25 cents. 8x10 en- atgement unmounted, 30 cents. Carkhuff Photo Finishing Co., 2129 W. Van Buren &t.. Chicago, I. BIG Money ~ Saved on Lenses and Apparatus—goods repairing done. Ralph J. Argyle St., Chicago, Dept. MODERN Photography in all . its | branches now taught by mail New Successful Method Students earning $300.00 while learning. Big Opportunity. Write for par- (ieulars and unusual offer open for short time. Dept. 3431, International Studios, Ene., 3601 ichigan Ave., Chicago. MOTION PICTURES REMARKABLE New Home Motion Pic- ture Projector, light weight, good illumina- tion, amooth running. Can also be used as a slide machine. Complete with reel of film, $32.00 No better value possible Send gour order ~_ DeFranne Importers, 109 N. Dearborn, Chicago, 111 400 REELS Features, Comedy and Educa- tional. Bargain lists free. National Equip- ment Co., Duluth, Minn. BARGAIN. 6 Two Reel Slapstick Comedy Movies $4 per Reel, while they last. M. Gordon, 1002 Mallers_ Bldg., Chieago. MOVING Picture Machines and Films for Sale. Send Stamp for List. National ike Brokers, 3907 Summit, Kansas City, exchanged ; Golsen, 1128 — TRICITY 10c per hour. Motsco Auto Generator operates on any automobile or truck. Produces electricity for moving picture ma- chines, theatres, tents, schools, churches, etc. Mazda equipment and globes for all profes- sional and suitcase machines. Details free. Monarch Theatre Supply Co., Dept. 724 So. Wabash Avenue, Chicago. ~ $35.00 PROFIT + nightly. Small capital starts you. No experience needed. Our machines are used and endorsed by govern- ment institutions. Catalog free. — Moving Picture Company, 482 Morton Bldg., Chi- cago. HOME Projector, 1,000- foot, $25. Driven Projector, $50. 250 New Suit C ase, motor driven, $75. Read Show tors, 50 Secrincee all Movie Cameras, New $38.50 Kodak me ceiver $27.50. F WONDERFUL Opportunities for — Fortunes in this Business. No Experience needed. Complete Theatre QOutfits sold on Easy Terms. Free Catalog. Monarch Theatre Supply Co., Dept. P, Memphis, Tenn. “alif. Motor ~ Photographic } 6 POPULAR MECHANICS ADVERTISING O ROY! The Bass ‘‘Bargaingram’’ for this month will astonish you Think of a com- plete Professional Motion Picture Camera, Tripod, Film, ready to start in a news weekly studio or commercial motion-picture film for only $74.50. Dozens of other items just as good. Write for your cepy at once. Hun- dreds of Bass’ customers have become finan- cially independent making motion pictures. The 575-page “‘Cinema Handbook’”’ for only $3.00 postpaid. The 52-page ‘‘Bass Cata- logue’ is free! Write or wire at once! Bass Camera Company, 105 North Dearborn St., Chicago, U1. BIG Money Complete Outfits, did Home Outfit, Nightly—Good assortment. instaliment plan. Splen- $25.00. Ralph J. Gol- sen, Dept. M, 1128 Argyle St., Chicago. _ AMERICA’S Greatest Fortunes made in the Motion Picture business. We furnish com- plete theatre equipment on easy payments. Openings everywhere. Catalog free. Mon- arch Theatre Supply Co., Dept. A, 724 So. Wabash Av., Chicago, mi $$$ FOR Ideas. Photoplay plots accepted any form; revised, criticised, copyrighted, marketed. Advice free Universal Scenario Corporation, 206 Security Bildg., Santa Monica and Western, Hollywood, Calif. START a Theatre. Picture Machines Complete $50.00 up Fire Proof Booths, = Mazda Equipment. Send for litera- ure Western Motion Picture Company, Danville, ee ee ~ MOVIE Films for home and theatrical use; largest stock, lowest prices; comedies, complete subjects. $3.50 reel up: features $20 up Write for list. Independent Film Exchange, Dept. B, 303 West Commerce St., San Antonio, Texas. _ UNLOADING all ovr high-grade film, comedies, westerns, dramas, one, two and five reel features $5.00 a reel. Send $5.00 or a 1,000-foot reel. Complete storic Order now. Mutt and Jeff cartoons per reel $8.00. Iitinois Film Sales Co., Dept. 83, 724 So. Wabash Ave., Chicago MOVIE Films for Home, School, Church and Theatres. Comedy, Drama, Cartoon, Cow- boy, Indian, Jungle, Religious, Historical, Fairy, Travel, Vodevil and Educational sub- jects. $5.00 per reel up. Complete List. Mon- arch Theatre Supply Co., Dept. G, Memphis, enn. MAKE money “writing photoplays; details free to beginners. No _ correspondence course. Producers League, 230 Wainwright, St. Louts. SCENERY TO RENT SETTINGS for Opera, Plays, Minstrels. Plush dreps. Address Amelia Grain, Phila- delphia. EDUCATIONAL AND INSTRUCTION USED educational matter bought, sold, exchanged. Bulletin free Instruction Cor- respondence Exchange, 1968 Broadway, New York SHOWCARD writing made easy. Instruc- tion book and complete outfit $1.00. D. Gale, Box 315, White Plains, N. aie WORLD-ROMIC Sy —, Noe og = ‘to All Languages. Primers, $1.94 each language: Bohemian, Chinese, besiahe Dutch, English, French, German, Italian, Japanese, Latin, Panjabi, Polish, Portuguese, Rumanian, Rus- sian, Sechuana, Singhalese, Spanish, Swedish, Tamil. Pronunciation-Tables, 30¢ each lan- guage. Dictionaries, grammars, 4,000 lan- guages, of 1,700,000,000 people: Afrosemitic, Amerindic, Eurindic, Indopacific, Siberic, Sinindic, Languages Publishing Company, 8 West 40th Street, New York. ~“CARTOONISTS—Improve your “style by following the work of the greatest cartoonists found in the bound volumes of Cartoons Magazine, Three volumes, each covering six months, Jan.-June 1919 to Jan.-June ew inclusive. 1200 cartoons, 900 paces volume, 7 by 9% in., 3 in. thick. New 2S, durable and attractive binding. Sold separately at $2 per vol. postpaid. Supply limited. Send at once. Popular Mechanics Book Dept., 206 E. Ontario St.. Chicago. LEARN Patent Drafting. Complete In- structions 50c. Patent preting Syndicate, Box 858, Schenectady, N. CARPENTERS—Handy- -men, make com- bination stool, stepladder, bench, stand, writing table, service tray, drafting easel, - = ~y Drawings 50 cents. Home Equipment ., Drawer 923, Butler, Penna FEAR, as and bashfulness banished. Self-eonfidence achieved tn ten nights of sub- conscious reconstruction; in ten days of di- Tected activity or yout money promptly re- funded Complete course $1.00 Address, H. Lawrence Juhnke, Box 854, Sacramento, SECTION PERSONAL Advan decicae upon a vor: course of home study, tion in the books : the best book on any subject for a year Send your name ar a postal today to Popular Mechs Room 805, Popular Mecha: Chicago, Il CIVIL Engineering Six Begin in May. Technical In ville, Ohio. BE a Laboratory Expert to $500.00 a month. Study Bacteriology, Laboratory Techno! tation. Interesting Extensior 1 Resi- dential Courses Diplomas and Degrees granted, 7l-wiece Urinalysis Ont Dons to students. Write for Free 48-page Proc, 4 e lanics Today. Int’) Physicians and Surges ( of Microbiology, Room 955, 550 Garfield Chicago, Ill a. WRITE articles, stories, nev time for newspapers and magazir pay. Copyright book free. Pre 981, St. Louis, Mo SQUARE Dance Self-instru. ‘or 25e. Quick results. G. Els Green, Ohio USED eaucational matter, books ete., sold, rented and exchanged. Big list free Lee Mountain, Pisgah, Ala “WHAT to Invent for Profit” free. Patent News- N, Washington, D. C ~ YOU can have a business profes ssion of your own and earn big income in service fees. A new system of foot correctior readily learned by anyone at home in a few weeks. Easy terms for training; open- ings everywhere with all the trade you can attend to. No capital required or to buy no agency or soliciting Ad Stephenson Laboratory, 1 Back Bay, ton, Mass. DOUBLE Entry Bookkeeping 60 hours with 8 keys; guaranteed Our graduates lead in bookkeepi accountancy, balance sheets, a f statements. International Bookkeeping stitute, Dept. 8, Springfield, M USED books and educational sold, exchanged. List 1,000 Students’ Exchange, 47-A West Fo rty-se Street, New York, N. YY. ARTIFICIAL Marble, sanitary instructions, ornamental casting plaster, papier-mache decorations, ¢ niture, statuary, Rubber-moulds, E) I allurgy, particulars and 200 illustrations Chris Mahler, Box 122, Huntington, N ~ BOOKKEEPING in a Week, $1 Pi stpaid. Dukes, 1857 Walton Ave., New Yor ROPP’S Caleulator and Short-( A metic shows the answer as quick ! watch shows the time to all proble lik to occur in office, store, shop, bank, ! factory. Price, pocket siz I cloth 50 cents; leatherette § cloth $1.50 postpaid. P chanics Book Dept., 206 E. 0 Chicago. RADIO OUTFITS AND SUPPLIES FOR Sale—10 watt set for ke casting For particulars write A ling, 108 Elm St., Kalamazoo, Mic! WLAQ. Will mail photo on_re RADIO—Build your own and 12 standard, practical working to five tube, good size bluepr Cash, money order, check. Act quick Walters « Co., 131 West 23rd 58 York Cit HARKNESS circuit two tubs of four or five, Detector 2 R Complete genuine parts including 0-formers-Reinhold detector a’ tubes $23.50. Range 1,000 to 1 5 loud speaker. New catalogue 6 Royal_ Mfg. Co., Dept. 501, 20¢ New York. ire _ KNOW Radio. Send $5.00 for “Text Book on Radio,’’ indorsed |! ties. No amateur or radio fan without it. It tells everything —be' a lifetime subscription to a radio maga” Postpaid on receipt of $3.00 anywhere, U. 8. A. and Canada. Department-Radi Bass Camera Company, 109 N. Dearbol Chicago. LONG distance single tube set. | with tube, $13.75. Specialty Sales ‘ Greeley St., Milwaukee. ~~ LAMBERT’ S Reach-Out Crysta kind I use on my famous DX crys that reach out and bring in concer 1,000 miles away. Mounted, 60¢ each, ty0 | $1.00. Unmounted, 4c each, three for > Fixed detector, $1.50. Mailed post J day I get your order. Leon Lam! South Volutsia, Wichita, Kans Ave a,

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Gr $300.00 Sani 1 Resi- Degrees Free to ross College eld A In spare Ps. Big yond P lust il bk g Ks, ete, list free, Patent pssion of n service trcction: ne ma nt-Radi POPULAR 31 Get this latest book. Radio Entirely new and thoroughly k containing immense amount ive information which will meet f every radio enthusiast whether cpert, amateur or professional. and correct instructions from e can build and successfully f the circuits given. Contains tion of hook-ups ever published, standard types and latest de- Gives complete electrical de- lits showing every detail on surpasses all other books of its simplicity and in thoroughness pages. 284 illustrations. No ast can afford to be without it. $1.00 postpaid to any address. free catalogue of other good A. Burley, 63 City scientific books. Street, New York Radio Receiving Set. Guaran- 0c postpaid. Tru-Blu Supply Rochester, N. Y. ‘\NEL Tool for cutting peep or in radio panels Cuts smooth five inches in diameter. Only id Homer Malcomb, White- LES Distance with one tube. Any tands our Simplified Instruc- ng Panel Layout and Photo 25c. Co., Box PM-117, Oakland, k batteries, | 6 volt, 60 ampere, $5 : Transparent cells. J. ( sllowh#il, Philadelphia, Pa ; ONARY of Radio words and terms, mbols, wiring diagrams, radio i complete electrical dictionary, he-minute, just published. 1 h cover, vest-pocket size 35e Popular Mechanics Book Dept., Ontario St., Chicago 10 Generators—500V. 100 watt $28.50. Charging Generators $8.50 High Motors—Motor Generator Sets, all \ r Specialties Co., Crafton, Penna. $30 to $300. Super Hetero- rodynes and other types All % off list Why pay more? r Bulletin 244. Radio Exchange, 925 r New York was oe Asem VORY Radio Panel White “‘Ivorylite’’ h N beautiful set. Guaranteed satis- 3-16” thick. Three cents Sample sent. E ‘ Dept. P, Fort Worth, FO Ete ampere detector or = $3.49, variometer parts 49c, $1.49, sockets 34c, dials oe, Write for list. Martin Hard- Hamilton, Mo. Speaking Crystal Set Broad- heard throughout house. Easily acted Instructions complete 25c. Catalog free. Steinmetz Wireless Mfg. Co., Eastend Pittsburgh, Pa RADIO Map of the U. 8S Government Radio Stations, Broadcasting Stations, Com- mer Stations, Call Letters, Wave Lengths, et « postpaid Popular Mechanics Book Dept E. Ontario St., Chicago RADIO Sets LOUD TELEGRAPHY TELEGRAPHY—Both Morse and Wire- ss—taught thoroughly and quickly. Tre- yu lemand Big salaries. Wonder- pportunities., Expenses low; chance part School established fifty Catalog free. Dodge’s Institute, Valparaiso, Ind. TRADE SCHOOLS t do better for Your Future Than Big Paying Trade. Write for our gue of Sign Painting, Show Card Pictorial Painting, Decorating, g. Graining and Marbling, Auto Chicago Painting School, 147 West Chicago, Ill aad tter What Trade you are interested get help from Personal Advance- zine, published by Popular Me- nd sent free to all who request it. ) you decide upon a vocation. Send ne and address on a postal to Mechanics Press, Room 805, Pop- nics Building, Chicago, Ill BUSINESS OPPORTUNITIES Sane MAII ORDER Magazine and Papers 50c. ansen Company, Brookings, S. Dak GOLD Window Sign Letters. ture them at home Unlimited profits and portunities. Complete instructions No experience required. Par- «Miterding, 1144 Pleasant Street, “Manufac- Profits. Refinish, Regloss, Retrim, rs. Make auto specialties. Demand ed We teach you these modern Mail Small outlay starts your Autorenuco, Sheboygan, Wisc. MECHANICS ADVERTISING SECTION 37 $2.00 WORTH of Potatoes makes $25.00 worth of “‘Tater-Flakes."" Newly patented Potato Chip Machine turning out the best product ever known is rapidly being placed on market with great success Machines in Chicago, Des Moines, Los Angeles, Kansas City, Jacksonville, Peoria, Sunbury, Pa. and other towns are making $100-$150 weekl net profit te owners. Only one machine sold to a community. Remarkable retail and wholesale business. Investment of about $1,250 puts you in business of your own. Good man needed in your town who is ambitious and has some business experience; such man as our representative will make $5,000 to $8,000 yearly. If you are the man write us immediately or better, come to Chicago and convince yourself as to the merits of the proposition. Tater-Flakes Co., Room 700, 20 East Jackson Bilvd., Chicago SIGNS, Banners, Cards Easily witr the aid of Letter Patterns. of 10 different styles 10« John A2433 Greenview Ave., Chicago MANUFACTURE new, fast selling artic les. Free list of plans, patterns, molds. Morton Barter, 3937 Tracy, Kansas City, Mo. PATENTS—Write for our Guide Books and “Record of Invention Blank’’ before disclos- ing inventions. Send model or sketch and description of invention for examination and instructions. No charge for the above in- formation. See advertisement on pages 152 and 153. Victor J. Evans & Co., 192 Ninth, Washington, D. C. PATENTS Procured. Send sketch.or model today for examination, poomas report and ad- vice No charge for preliminary advice. Write for free Booklet and blank form on which to disclose your idea. Highest refer- ences Promptness assured Clarence A. O’Brien, Registered Patent Lawyer, 583 Se- curity Bank Building, Directly across the street from Patent Office, Washington, D. C. See pages 150 and 151 500% PROFIT. Copyright Novelty Chart. Wonderful Mail and Agent Proposition. Sample and Selling Instructions 25¢ Silver Reynolds Company, Dept. Hl, Box 1261, Uniontown, Pa ~ MONEY! Mirrors, tableware, ods free. Clarence Marion, Ind. LEARN Candy Making. Make big profits at home or in shop Big demand for good candy. Easily, quickly learned through our correspondence course. Write today for book- let 1-6 The Candy Institute, Sixty West Fiftieth Street, New York INK Powder, guaranteed formulas for mak- ing any color, $1.00 each. Frank Shilling, 1017 Dueber, Canton, Ohio “AGENTS Wanted—Something New—Fire fighter sells easily. Makes a spectacular demonstration; car owners, homes, factories, stores, practically buy on sight Our men make $10.00 to $50.00 a day; exclusive terri- tory. If you wish to establish a business of your own with unlimited possibilities for making big money, write us today Fyr- Fyter Co., 14 Fyr-Fyter Bidg., Dayton, Ohio A TEA ROOM or Cafeteria will make you a fortune—you can operate one of your own or manage one for others. We teach you in a few weeks and put you in touch with positions and money-making opportunities—earn $5,000 a year—be independent. Ww rite today for book ‘Pouring Tea for Profit."’ Lewis Tea Room Institute, Bureau G-31, Washington, D. C COMMON Sense and $100 or more will establish cash business. Dept. M, Paul Kaye, 149 Broadway, New York MEN Wanted everywhere to start a busi- ness of their own. Pays $75 to $100 monthly. Brains and energy the only capital required Full particulars and working plan, by mail, calit Claude Hurley, Box 383, Culver City, Ca MONEY _ Getter—aAttractive patented. Get busy, Capital required. Write Inventor, 1323 West 101 St., Los Angeles, Calif. cou NTY Distributors Wanted—Sell New Thermostatic Automatic Carburetor Control Attachment for Fords. Big Profits, full or part time. Burns 95% air. Doubles Mile- age. Attached in 2 minutes. No drilling Does automatically exactly what Ford Manual says do by hand. Cadillac now using Thermo- static Carburetor Control under Blancke license. Write today. A. C. Blancke & Co., Dept. 161-B, 602 W. Lake St., Chicago small publishing and mail order Magazines free if you send some advertising. Sample, plan, 1l0c. Harvey Teeple, Decatur, Ind $5 TO $15 Daily—Sworn Proof, Introducing New Guaranteed Hose. Must wear or replaced free. No capital or experience required You simply write orders—We deliver and collect. Your Pay Daily, monthly bonus be- sides. Spare time satisfactory. Mac-O-Chee Hosiery Company, Room 2586, Cincinnati, Ohio. Painted Samples Rahn, Silvering Autolights, Radiators, stoves Out fits Meth- Sprinkle, Dept. 28, ~ refreshment, machines ready Small A BUSINESS of your own for $3.00. Think of it! $3.00 starts you on the road to suc- CESS A daily Necessity to every housewife Easy to sell Cleans, polishes metal, glass, enamel, grease from the hands Case of 24, exclusive territory, Free samples $3.00. Mail application today. Lumite Products, 409 Wal- nut, N _E Canton, Ohio 120 MONEY-MAKING Plans Freel Wol- verine Bureau, — G3, Muskegon, Mich _ START Mail Order Business Practical information concerning its wonderful opper- tunities obtainable through The Mail Order America’s leading mail trade publi- Yearly subscription $3.00 Sample ». Booklet free. Mail Order News, 1656 Bristol Bidg., New York. CEMENT Masons, Plasterers, Contractors, Build successful business, stuccoing old and new buildings with Everlastone Indestructible Stucco; also installing Corkstone Floors over worn-out flooring Write immediately for agency proposition, Everiastone Corporation, 828 Ww. Pratt St., Baltimore, Md BE Ready for your golden opportunity by preparing yourself. Personal Advance- ment, a new magazine, tells how to do this Will be sent one year free No strings this offer Popular Mechanics Press, Pop- ular apephantes Building, Room 805, Chi- cago, STR: Aw Hat cleaning compound in bulk « package; sample package and particulars Big profits. Byron, 27 Station Eye, York MAKE Money at Home, Quickly, Easil Steadily, Spare Time New, Simple, Mail- order Plan. Details Free. Geo. P. Bucknam, 63 Court St., Room 1. Boston, Mass PATENTS Procured; Trade Marks Reg- istered — comprehensive, experience, prompt service for the protection and de- velopment of your ideas Preliminary ad- vice gladly furnished without charge Book - let of information and form for disclosing idea free on request Richard B Owe 0 Owen Bildg., Washington, D. C., of 2276-R Woolworth Bidg., New York NICKEL plate automobile accessories, hardware, electrical parts Big profits Re quires no capital Simple battery process Write today. Webster Engineering Co., Web- ster Groves, rf) FORMULAS, Processes, Different, dependable, profitable Catalog free B. Thaxly Co., Washington, D. ¢ FREE Book Operate little Mail Order business anywhere, Home employment nings We furnish Working Outfit, Circulars and instruction Also tell how to get agents to sell your specialties for you Instructive Booklet free Pier, 670 Cortland St., New York GOOD Money easily earned at home spare time Silvering Mirrors Glass Embossing, Chipping, Frosting, Gold Leafing, et G L. Patterson & Co., Brooksville, Ky “GET into the ~~~! Manufacturing Business” or “‘Why Work for Others?’ may sound good to you, but you won't succeed in that business unless you possess Formulas that are absolutely reliable, the same required by leading manufacturers supplying the Best. Don’t be Bunkoed into buying a Collection of cheap ‘‘Formulas’’ and expect to succeed Send today for my valuable literature and Formula Lists and Real Money-Makers in the Specialty Man- ufacturing Business 26 years supplying the Best. Miller, Chemist, 805 De Leo St.. Tampa, Fla “HOW to Sell Patents’ free News-H, Washington, D. C UNPATENTED Ideas Can Be Sold It tell you how and help you make the sale ka particulars (Copyrighted 1923) Write Greene, 810 Jenifer Building, Wash- A D.C - al MAKE toys and novelties at home Big profits Instructions and 200 illustrations, 25 Astrolite Company, Sharpsburg, Pa ATTENTION!! You can have a business of your own Establish and operate New System Real Estate Business, brokerage and insurance agency in your community Office at home. Earn $5,000 year. Representatives wanted everywhere Send stamp for free booklet Hayes Realty Association, Cincin- nati, Ohio FOR Sale—A smal! mail-order business been very profitable for last two : sell stock, dies, electros, good Splendid opening for hustler with small capital; big future if properly developed Now furnishing one of the largest mail-order houses in this country Recommended by Good Housekeeping Institute Must sell because of sickness For particulars write G. A., %Room 304, 200 East Ontario St., Chik ago, Il Trade-Secre Patent

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38 POPULAR MECHANICS ADVERTISING SILVERING Mirrors! My ex t method opens enormous Booklet free H Oakland, Calif INVENTORS—Write for our Guide Book, How to Get Your Patent’? and Evidence of Invention Blank Send model or sketch of your invention for our free Examination and Instructions we Iph & Co., Dept. 435, Washington, dD. Cc $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, Cleveland, Ohio. CHEMIC CAL FE Expert furnishes manufactur- ing formulas with complete working directions, resulting products possessing distinct individ- uality and merit. Processes perfected. All lines. No lists of worthless stock formulas but reliable individual service. Charges rea- sonable, correspondence invited. Dr. Arthur VanHeeden, 508 South Oakley Boulevard, Chicago. MAIL Order “Business is your opportunity. Brentser’s Famous Handbooks teach how to start small, grow big. Sell merchandise, service, ideas; enormous profits. Spare time to begin. Get complete set, 11 books, $3.00, and be posted. Breniser, 335 Walnut, Phila- deiphia. Descriptive Catalog and big batch interesting mail order information, 25c. None free. BIG money writing photoplays, stories, poems, songs. Send for free copy America’s greatest magazine for writers. Tells you how to write and sell. Writer's Digest, 603 But- ler Bidg., Cincinnati, Ohio. 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 —. Write quick for details. Lightning Calcu- lator Co., Dept. ie _Grand Rapids, Mich. WE Start You in Business, furnishing 23d Street, everything; men and women, $30.00 to $100.00 “New System Specialty Opportunity W. Hillyer Ragsdale, N. J. weekly operating our Candy Factories’’ anywhere. lifetime; booklet free. Drawer 4, _East Orange, 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 hunt- ing, soliciting or agency. Address Stephen- son Laboratory, (1) Back Bay. Boston, Mass. START and ‘Operate Your Own Business. Our System proprietary specialty manufactur- ing offers wonderful opportunity to make $100 to $500 weekly. Openings everywhere. Either men or women. We furnish everything and show you how. Big egpaneneey, | book, “The pen Door to Fortune’ free. Write for it ow. National Scientific Laboratories, 208 Monroe, Richmond, Va ICELESS Refrigerators How to make, How to sell them and How to finance your husiness. Mailed complete for $2.00. Sensible System, 2875 California St.. San Francisco, CHEMICAL Expert will furnish Formulas and Trade Secrets. All lines. Lists Free Ww. L Comnt ngs, Ph. D., 228 Gordon Ave., Syracus se, N COST $5.00, i profits $104.75, trans- ferring monograms on autos, trunks, bags, etc No skill required Samples and in- formation free. World Monogram Co., Dept. 16, Newark, i ~ MED N—Look_ into our proposition of Wall- paper Cleaning. Take big cleaning contracts. Unlimited field. C. Swanson & Sons, Man- kato, Minn. START a Real Estate Office of your own. Earn from $3,500 upwards. Our course of 21 lessons tells you how. Booklet M, on application. Frederick Jenkins, Corlaer Heights, Schenectady, N. Y ~~ PATENTBOOK, 139 mec hanical movements and illustrations, sent free. Labinere, 3 Park- row, New York.

I MADE $30 a Week Home. “French Breadmaking. 15 years’ experience; Free Booklet tells. Ashbrook 67, Marengo. 0. MAKE $3.00 hourly. Electric Lawn Mower Sharpening. 415 South Lawndale Ave., Kan- sae City, Mo. FIFTY ““Moneymakers”’ for Mail Dealers. 500% profit. K. Home, 1957 Warren, Chicago.

MAKE Money at Home—r We show you how. Send $1 working drawings and kalb Designing Co., making toys for complete instructior Le Decatur, Ga GREATEST Fortunes in Motion Picture Business, Small Capital Starts you with Com- plete Outfit. Details Free. Monarch Theatr Supply Co., Dept. F, Memphis, Tenn GO into the Crispette business. Everybody likes Crispettes. You can make a lot of money. We start you. Write for facts. Long Eakins, 1959 High St., Springfield, Ohio. INCH Display Advertisement 166 Maga- zines Thrice $15. Year $50 Page $100. Wood's Popular Services, Atlantic City, N. J “‘WHAT to Invent for Profit’ free. Pat- ent News-C, Washington, — dD. ¢ $72 a week Wonderful invention Doe chines costing ten times | any record Built im just Like Carry it with you anywhere I day Write or wire for ter Ludlow Co., Class 1862, Dayt A BUSINESS of Your Own ling Glass Name and Number Piat« lions, Checkerboards, Signe sig Book _ Free E. Palmer, 512, W AG }ENTS 3 Wanted to Adverti and distribute free samples to « an hour; write for full particu Products Co., 1796 American B nati, Ohio AGENTS, $42 a week Se hosiery for men, women, ii give satisfaction or new hose line of silk hose zatest style Big orders everywhere Pa J Write for samples. Parker Mfg ple 978, Dayton, Ohio AGENTS: $25.00 daily ‘aking Walton-Duplex Reversible Doublews factory to wearer. Pay advanced liver. Walton-Duplex Company Bldg., Chic icago AGE NTS: $100 00 We deliver. High grade Hosier wearer. 21 styles for men, womer dren. Donde Hosiery Co., 503 Lee Chicago CREW Managers Washing Compound. Your name on Sells Fast Great Repeater 00% Samples with your name on furnishe Besco, 1943-W Irving Park, Chicage ~ WHY Work for others? Start and your own business. Our system pro! specialty business offers wonderful opr ties to make $100 to $500 weekly. OF everywhere. We furnish everything @ yeu hew. Beoklet free. National Sci Laboratories, 208 Monroe, Richmond 1 ~ weekly. P Distribut

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POPULAR MECHANICS ADVERTISING SECTION 39 mple “Rain Shield Wiper.” | THESE Advertisements of mine have ap- WHY Work for others? Start and operate Costs (25c). Sold, Clear and peared in Popular Mechanics for sixteen your own business. Our system proprietary No Cloth—No Paste—No At- years. Hundreds of Successful Manufac- specialty business offers wonderful opportuni- 1) Rub keeps Windshield Clear turers today owe their success to my for- ties to make $100 to $500 weekly. Openings Experience unnecessary. NuLife mulas and valuable information Majority everywhere. We furnish everything and show Hartford, Conn. started with practically nothing. You can you how Booklet free. National Scientific Send for free sample “Fretnot™ = yo = gs p 4 . -~ Laboratories, 208 Monroe, Richmond, Va wonder. You can clear at least erature ativ y Guarantee a 5 era weekly, according to spare or | Ufacturer’s Formulas for making Non- wre Paying Business—Earn § 50 to $100 You don’t have to talk; if she | Thermic see rome. Bottler BS coke buys on sight; quick cash sales; steady at sight, leave sample; she will | Smiges n. | —— , et -~-- repeat orders; small capital starts your own s for you long before you are able Flavors, Launderite Washing Marvel, Ze- | business. Write for free booklet. 8. Vv e rounds again. Samples furnished > i Sta-Combed, | Mfg. Co., Desk P, 403 Diamond Ave., 8. \ iums for your customers. Exclu- | best. ome C = eg yw Grand Rapids, Mich ’ . Credit given. Empire Special- | Marcel Hair Curler, and latest Toilet spe- ——- 9 N. W . 101, Chic cialties. Mexican Yucca Soap, Laundry | AGENTS, Distributors; Radio Pack—the 9 N. Wells, Dept. 101, Chicago. - = Soaps, Flynox, Sensol, and all latest dis- wateriess hot bag, sells on sight; no ex MOST Wonderful Seller. 96¢ profit every | infectants. Amazon Tire Repair, Toy Rub- perience or capital required; demonstration wilar. No stock to carry. License un- | ber Ralloons and all latest selling goods in | sells it; steady repeat demand ‘‘recharge;’’ peessary. Sample free. Mission Factory | 41) lines. Don’t compare these with “junk” | collect your commission as deposit; we de- PM, 519 No. Halsted, Chicago, Ill. commonly offered. Analytical work care- | liver and collect balance C. O. D. Write GENUINE Gold Leaf Letters enyone | fully done. Highest references. Miller, | today for selling plans. Radio Pack Co., ean put of — a on to | Chemist, Tampa, Fla. Dept. M, 59 Pearl St., New York sever tarnish, arge | profits. mormous OUSE Dresses, $12 doz. Sell dozen | AGENTS—$10 to $35 a week spare time— sand. Free samples. Write today. Metal- daily, $3 ‘ge ¥ : tent t > & week spare time- 3 a ' y, $2 each. Sample sent C. O. D. $1.10. 30 to $100 a week full time. Sell 21 eee a 438-A North Clark, Chicago. Write for free catalog. Economy Sales Co., | A new style, thin-model, Studebaker In MEN ogg Ae VE 2°" Dept. 48. Boston, Mass. sured Watches direct from factory to con- e itlery Set—Hous 8 a scsi ciel Ginna tes Ga 8 . WwW sy y- n sight—Every house and office a pros- I NEED 100 more men and women to act ot oe’ ie a apertense @n- nderful seller—New Plan—$1.25 | #* my agents and take orders for Comer | | icessary. Commission paid on first pay- vith each set. Can sell separate raincoats, raincapes and water-proof aprons. ment. Catalog and Plan Free, Write to s also. Samples Free. Macochee Cutlery | 1 paid T. D. Wick $13.60 profit on orders | Ciidnarer Watch Co., Dept. 111, South Stand 1106, Cincinnati, Ohio. taken during two hours of his spare, time. Bend, Ind . . , 1 \MAZING Im. Diamonds, defy experts; —— — $945 in one ——. o: ay = “AGENTS Wankel ilcmethinn teow lise sive solid silver platinum finish mount- | 1u ‘ORC. nee ee ot No deliverin Fight Ay -/. -— ng snestneniae can harvest 100% easy; whole- you $96 a , oan profit 0 de —— a er “ S easily. a a * “~ en $2. brings ladies’ and men’s | °F. collecting - one an — smonstra ans 9 —- oe On eres, Start your business now. Pauer outfit and instructions _ ge ies r —_ stores, practica 56 uy ao gh 4 ~ men 153 Dewitt, Buffsie, KY. ___. baie 3 ‘nooo. “De ot W- 595, ‘Dayton, Ohio. rteeey. a L.A tablish s business PING names on emblem key checks. £ =" = “— ve ; — wr i ostebaeia 2 Key check outfits, steel dies, AGENTS—Moseo Corn and Callous Re- , on Og Eg Mays — 1 ete Service Sales Corporation, mover will build you a steady repeat busi- Fyr-Fy e 12 Fy Fvt Bla D mtg Ohio ness. Send today for pocket size trial out- Ohio yter Co., 12 Fyr-Fyter Bidg., Dayton, : # - sae . EVE RYBODY Buys Our New Household oo _ yomoens. 192 Searle Bidg., SGENTS— Bia Brodie Genclne Geld Lect e-Sharpenet, @ seal grinder thet any i s nee Te window letters and scripts; anyone can put use. Automatically puts correct MONEY! Silvering Autolights, Radiators, Consolidated Si Letter C 622 8 keen edge on any knife in ten | Mirrors, tableware, stoves. Outfits. Methods De b a ooh en Le a. Sos Half-minute demonstration makes | free. Clarence Sprinkle, Dept. 28, Marion, Sarbore, _Saicems. J *. Le a Y 657 Com- Ind “ out Ov nasties —Ceep everything —write for sldg., Newark, N suvtngisiiageentllie BIG Money for mechanics, machinists and | OUF Cleanup proposition on pearl necklaces BIG Money—Selling Fiber House Brooms. | train men selling ‘‘Great Stuff,”’ wonderful 3 8 fay = martes a ae oun Sure-Fire Seller and Repeater Biggest | hand cleaner, to fellow workmen. Removes Chicage rading o., as S.. son Here. Write Today Bartlett, Van all trace of grime, grease, dirt, paint and cago. = » & Jones, Hillsdale, Mich stain in a jiffy. ‘No harmful effects. Get MAKE $31.00 Profit—Cost you $1.50 HERE They Are; Fifty va Saneene on aw ie yous chee. —" like -_ Cengaete Gold Bonsgramaing Gute. —— oe ee ; “ ‘itty | ; | cakes. Send 25¢ for package and proposi- erre nstantly on Automobiles, Trunks, ~yA aot a Be owe tion. G. 8. Products C9. Minneapolis, Minn, Begs, . Ld gas Mg ee t magsoscety Pittsburgh, BIG Profits. New $3.50 Automatic Adding ied amples. NuLife Monogram, ord, ORANG EADE, in a —just add cold Hecke Gut ales = acompetition. ANY - henae " i t = ae nost delicious drink you ever a ey TE ae ee ~~ Ro SO el BA with ‘pain ae, td Fine for home, parties, picnics, coek 1 sitive ustomers. Exclusive = . ~ 9 thin : need | everywhere € asily — 4 in, y — i oe territory to Nworkers. evAct quick. “Bassett nearly all prott; experience net required. om eocaan postpaid. ny kinds, Cherry, | Company, 1458-J Hollywood Ave., Chicago. | John Braceland, 1457 So. Ninth, Philadel- Grape, Lemon, Strawberry, etc., for 70 DIAMOND Sensation at Last! Amazing | Phia, Pa saaiiieas glasses nly 50c, postpaid. Morrissey discovery of Rajah Gem startles Jewelry EVERYBODY uses extracts Sell Duo Compar 1417-25 Madison St., Chicago. World. $100 weekly introducing these mag- Double Strength Extracts Complete line

AGENTS: 500% geet. ** Happy Home nificent gems. Sample case free Write | household necessities. Big repeaters. Write 1 Maker Shampoo” builds your own big busi- quick! Rajah Company, Dept. F7, Salisbury, today, Duo Co., Dept. El, Attica, N Martin of Indiana made $75.00 in one N. ——————— AGENTS—Sell Orangeolo and make big Missourt man made $750.00 one month. AGENTS’ experience unnecessary; as high money Makes the most delicious drink you ive territory. Geo. A. Schmidt & Co., as 120% commission; 10% bonus to managers ever tasted Send 15 cents for package W. North Ave., Chicago 18 Latest Hosiery Styles and colgrs 18 which makes yw a — 2 } ‘i Ironing Wax Pad and Asbestos Rest; Clamps : or 25 Agents antec yron, 2i, Panes Apr ag Fy gy hy -~ Board; Perfumes Clothes; Qutfit 10c. Yankee | Station I, New_York. we Bed Sheets, Bibs, Bloomers, Bath- Mfg’s, 380 Atlantic Ave., Brooklyn, BM. ¥. SELL Komik Display Kards, Price tickets Gloves, etc. Details Free. Ameri- $10-$25 DAILY Selling Men’s and Women’s sa lers, oe tends, ote. _F _ ber Products Co., Dept. 508, Pitts- shoes direct to wearer; exclusive territory; mand. Komik Advertising Co., Cambridge, "a sales come easy. Lyman B. Musser Shoe Co., Ohio - ‘ENTS: Big Profits, Gold Sign Letters, | 207 Palace Bldg, Kansas City, Mo RADIO Gas Lighters sell on @ Moment’s Te rete rate oa ons Dy s ( r \pplied. Samples Free. Liberal $10 DAILY easy. Experience unnecessary Uculars and Self-Selling plans. ww A 1 3680 Agents. Dept. C, Inter- Complete line fancy aprons and house lite Co., 110 East 23d St on York ‘gn, 2620 No. Halsted St., Chicago. dresses. Something new. Nothing like them — . - AG ENTS Get our r big sample assortment American Braiding Co., Dept. P, 329 Monroe, MEMORANDUM. Regier Dest Men - fr er. Teas, coffee, extracts, spices, food | Chicago a —s aan Bag a . ‘ > — ~ 7 - — » e as ¢ e ¢ s wri uc ( things ~——_ ote 240 fast sellers. $30.00 DAILY. $22.00 Eastman Kodak single and duplicate; both have permanent G _ 390 Harley Bidg., Dayton, Ohio. | free Lucky Six line combination topcoats, reversible features. Patented. No competi- L \GENTS, Di.crict Managers, 4 pairs | raincoats, $3.98 up. $1.00 gift makes sales | tion. Sells at $5.00 and $6.00 F. 0. B udies’ Guaranteed Silk Hosiery $5.00— easy. We deliver, collect Eagle Raincoat Indianapolis. Big Commission. Want Rep- & ‘“e commission; 17 other numbers; 18 Co., 640 Mid City Bank x ds. Chicago, resentatives in every city. Just wgenies ya wear patterns; we deliver. Managers | ~~~. <= sales tere. Heane Regis ter Co., 229 North injntmut Wate for Bree amples fhe | AGENTS Gell Make-Em-white Laundry | jMuenairanta ‘St. tntianapoli, In Lexingt 242. c —bes s } - - n_Co.,_Dept._13 1242 __ Lexington, __Ky. bing. Big seller this season. Free Reon. ~~ $75.00 PER Week Selling “Our New Un- AG sENTS: Write for our 1924 catalog of Ridgely Co., 224D Sheldon, Chicago. breakable Combs. Kind You Can Hit With Sellers. 100% profit. Capital unneces- te a Hammer. Sell Like Hot Cakes. Write ~ The Universal Leather Goods Co., PROTECTS Your Home and Property, the Today G. Buchanan, 63 Court St., Room 12 No. Wells, Chicago. Junior Electric Burglar Alarm, attached to | 1 Boston, Mass AGENTS—Brockton Shoe Factory 1 Dis- your Doors and Windows, complete with direc- ~SMIAN Wanted by largest concern of ite itor wants agents to sell men’s shoes tions for installing, Only $7.50. Send $1.00 hind Past er full time. Experience ue- ™ t to wearer. E i with order; balance C. O. D. Agents Wanted necessary, Our men getting tp te $200.60 . had very pair guaranteed. Warco Alarm, Box 664, Chicago ROCESS SE: # _ f co. 1 capital. Your commission $1.00 _ - weekly Lowest prices Red Seal *oal , Write Carter Shoe Co., 188 Crescent HAIR-NETS 20¢ dozen 4 dozen $1.00 Company, 353 Coal Exchange Building, Chi- ond rockton, Mass, Sobeco Sales Co., Sound Beach, Conn. | cago.

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40 POPULAR MECHANICS ADVERTISING GOODYEAR Mfg. Co., 1 Goodyear Biddg.. Kansas City, Mo., is makir n offer ie end a handsome raincoat free t one person in each locality who will rec nend it to friends Write today HEMSTITCHING and Pi ment fits any machine, for home rk ent collect Agents’ prices reduced rade Attachment Ce Denver, Col., Box 2210 GET into the tailoring game—one of the mest profitable of all lines in the selling field Experience isn’t necessary, and spare time will do. We teach you how to sell our ine, and supply you with everything neces- sary to go out and make from $10 to $20 a day from the very first day Our selling outfit is the finest ever gotten together and shows more than 100 large samples of finest quality woolens. You do no delivering with our line You just write the orders We do the rest Your profits run big and you get them cash with order If you want to get into this most profitable business, write us quick Address Goodwear Chicago, Inc., Dept. 92%, Chicago MOTORDOM'S Greatest Decarbonizer Economizer—U nbelievable Efficiency Engines. Enormously Profitable Hustlers”’ Conmmnunicate. izard,’’ Rochester Y FABRIC Patch-It Paste— Agents make enormous profits with Mrs. Efner’s original and the only crystal white mending paste It mends without stiffening or discoloring all colors and kinds of fabrics, hosiery, rubber, gand leather. Will wash, boil and iron ells on two-minute demonstration Needed | in every home Send 35c for trial tube and sheer white patch Recommended by the Good Housekeeping Magazine Agents, Crew Managers, and Distributors wane Ey territory and low quantity prices ,- Manufacturing Company, 2726 East Lake Street, Minneapolis, Minn FORMULAS, Processes, Different, dependable, profitable. Catalog free B. Thaxly Co., Washington, D. C AGENTS toth sexes We manufacture and control new household article, fast seller, big profits, exclusive territory; write now. Connolly, 123 Liberty St.. New York TABLECLOTH manufacturer needs fifty additional representatives. Tremendous de- mand. Splendid earnings Commissions daily. Julian Pam, 26% East 2lst Street, New York City AGENTS—$15 daily easy—Your Pay In Advaare—-Introducing New Insured Hosiery Must wear or replaced free No capital or experience required Just show samples write orders Elegant outfit furnished All Trade-Secrets eolors, grades including silks. Macochee Hosiery Company, Room 5866, Cincinnati, Ohio BUILD permanent business. Men’s Wom- en’s Children’s guaranteed shoes direct to wearer 4. P. Condon, Sales Manager Allen Shoe o.. 110 Summer, Boston $1.00 FOR Five Minutes’ Work. Latest automobile necessity Prize lucky number makes sales never fail. Newest idea Spe- eialties, 1403 New York Ave., Washington, dD. Cc AGEN TS—Steady nseful household Newark N. J REPRESENTATIVE in every town No selling Money maker. M. Barter, 3937 Trecy. Kansas City, Mo EARN $200.00 weekly selling musical nov- eltic Latest American tunes No compe- tition Write immediately Mignonette Co 13 Park Row, New York income. _ article. Exceptionally Handycap Co., $100.00 WEEKLY in your spare time Get the “Marvel’’ proposition from Union Import Co., 15 Park Row, New York PORTRAIT and Medallion Agents—Our Goods Will Make You Big Profits: delivery guaranteed; prompt shipments; low prices; send for latest catalog. Adam J. Kroll & Co., 602 Blue Island Ave., Chicago. AGENTS, 200% profit selling Gem Kettle Bottoms A household article with a dozen uses Fastest seller of the day Every housekeeper buys on demonstration yet Agents’ ‘“‘Quick’’ Sales Plan. Columbia Specialty Co., Box 73-D, East Liverpool, Ohio . M‘K*E $8 daily. Whirlwind seller. Im- ted Bamboo Fountain Pen. Free sample. fohter. Dept. 5, 416 S. Dearborn, Chicago ADD $50.00 Weekly to Your Bank Account Selling Needle Companions Retails 2 5c. Sample 10c. Mail Order House, Dept. A-1, Wilmerding, Penna. AGENTS, Salesmen—Sell New Thermo- static Automatic Carburetor Control Attach- ment for Fords Big Profits, full or part time Surms 95% air. Doubles Mileage Attached In 2 minutes. No drilling. Does automatically exactly what Ferd Manual says do by hand. Cadillac now using Thermostatic Carburetor Control under Blancke license. Write today A. ©. Blancke & Co., Dept. 150-(, 602 Lake St., Chicago, WHY Work for others? Start and operate your own business. Our system proprietary specialty business offers wonderful opportuni- ties to make $100 to $500 weekly. Openings everywhere. We furnish everything and show you how Booklet free. National Scientific Laboratories, 208 Monroe, Richmond, Va NOVELTIES from Japan, Germany and France. $20 a day easy Write for selling plans Spors Co., Lesueur Center, Minn 125% CLEAR profit selling neckties; 2 samples $1.00; satisfactory or money refunded Raymond Mfg. Co., 132nd St. and Madison Avenue, New York NEW 1924 Specialty 200% Profit when sold at 50c. Real $1.00 value Sells in every home. No Competition $1.00 to $3.00 an hour, full or spare time Thirty other big sellers. Free sample case offer Send post card today for particulars General Products Company, Dept. 7, Newark, N. | PORTRAIT Agents: Big profits working for yourself, pay for Prints, Portraits, Frames after delivery. Samples Free Picture Man Friedman, Dept. 8, 541 Lake St., Chicago. _ YOU Can Easily Make $60 Weekly selling new, popular Perfex Fibre Broom. Outlasts four ordinary brooms 100% profit Get agent’s Special Introductory Offer. Brooklyn Perfex Corp., 145-C New Jersey Ave., Brook- lyn, N. Y PORTRAIT Agents Live Wires!—Get This! Biggest hit house to house men have ever known. Artoil Portrait Paintings look exactly like oil paintings Big seller Big repeater. Big profits on every sale With Famous P. & G. Medallions makes a clean-up’’ line. Write for details Pudlin & Goldstein, 259C Bowery, New York SALESMAN V. W. Crawley write For six months, April to October, 1923, my net earnings have been $1688.03.’" You can do as good or better with our line. 60° profit, best brushes made and other striking ad- vantages Write for best brush story ever told Queen City Brush & Specialty Co., Dept. G, Cincinnati, Ohio AGENTS, Sell Anti- Rain Compound Keeps rain, snow and steam off windshields and eyeglasses for 36 hours Send 50c for sample and particulars Anti-Rain Co., 3932 N. Robey St., Chicago, Ill a, BIG Money quick and easy selling Horsey- SasSett Rubber Aprons Finest on market ‘ast sellers. You show samples and mail us orders We deliver and collect Your profits in advance Send 75c in stamps for Samples and Selling Outfit Sales guaran- teed. Address The Horsey-Bassett Co., Inc Dept. PM-6, Crisfield, Md BIG Clean Profits Intertwining Gold Leaf Monogram, any designs; for automobiles, trunks, bags. Easily applied. Samples free. National Monogram, 1018 Coronation Build- ing, Montreal, Canada $10.00 A DAY Easily Earned taking orders for our big line, quality soaps, perfumes, toilet goods, extracts, summer fruit drinks, spices, foods, towels, jewelry, remedies, novelty needle books, rubber goods, etc Men and women write for big offer Cat- alogue outfit free Western Products Co Dept. X3, 606 No. Oakley Blvd., Chicago YOU don’t need mother to wash your back! Our red rubber vacuum cup (bath tub) mas- sage brush will do it for you Holds to tub by vacuum. Size 6% x 3 inches Be your own osteopath A household necessity so novel that it makes its own approach Sells on sight at $1.50. Big profits Write for territory and agency prices Hutchison Manufacturing Company, 7721-23 Susque- hanna Street, Pittsburgh, Pa AGENTS Wanted Entirely New Profes- sional Line Small Articles. Korn Co., 299 Himrod St. srooklyn._ AGENTS—Three neckties boxed d singly "for $1.00. Retail $2.00, cash with order. Address 401 Searle Bldg., Rochester, Y AGENTS. Household necessity Sells rapidly Large Profit Square deal Pre- mier Mfg. Co., Dept. 813, Detroit, Mich. _ $14.00 DAY easily made selling new prod- uct Get this one; it’s a money maker. Write quick Specialty Mfg. Co., 645 Lin- coln Bide Detroit. Mich ? $61.50 WEEKLY. Introducing and selling a new gas light burner for kerosene lamps Beautiful light. No chimney No mantle Samples free. Experience not necessary Write today Luther Mfg. Co., Dept. 510, Cincinnati, Ohio i al AGENTS: $5 to $10 daily selling imported headed bags. Every woman buys on sight Sample $1.00, sells for $1.50 to $2.00. Halco Sales Co., 1018 Wabash, Chicago SHOES—Men’s Moccasin Work Shoes. Your commission $1.00 pair. We carry stock. Direct to wearer. Exclusive territory open in various counties. Big repeat business. Write new. Charles Kellert Co., 116 Bedford St., (Dept. 501), Boston, Mass, SECTION NEW Patented Auto Match Lj to every auto owner who smoke B “us for agents selling to garages, gasoling tions, cigar and news stands, barber ete. Send 25c¢ for sample and fu llr ng John N. Spies Manfg. Co., Watert NY $5 TO $15 daily easy—Intrody >. Style Guaranteed Hosiery. Must wear or” placed free No capital or exper a quired Just show samples, writ. ; four Pay In Advance We deliver | lect Elegant outfit furnishes all i i grades including silks, lisles, chiff O-Chee Hosiery Company, Room cinnati, Ohio. 3 EVERY-DAY necessities for ever " Unlimited demand. Every article guar Sales Dept., Elms College, Newark York AT last! Fill those orders Peppe Jamaica Ginger, Nitre, Tasteless Castor Oil, Arnica Peroxide Jodine, Breakfast Cocoa, Baking Powd Castile Soap. Profit Big. Jet Ph; i Company, Allentown, Pa AGENTS, Storekeepers, Hustler Give European Money Free with Every Purchase Triple Your Sales larly-Boys Cleaning Up Cheapest Prices on Earth Buy Where Deal ers Buy Circular Free. Hirschex, 70 Wall St.. New York SELL Startling new necessities that one must use continuously ; unique unrivaled irresistible, all purpose solver make easy. 20 products in one with tho yusand scientific marvel, in merchants, mechanics, motorist r factories, banks, homes: liberal fre and exquisite imported jewel pre Easy $5,000 yearly earner for worker I Process Co., Lakewood, Ohio Camphorated oj EXCLUSIVE territory Evershine stove ! metal polishes in tubes. 150 per t Evershine Company, Inc., Atlanta, Ga 00% PROFIT: Whirlwind Seller 1 mendous repeater **Kleanrite.”” Marve Discovery Washes‘ clothes without ru Premiums for customers Sells make 18c¢ Free samples make eas t Write quick Bestever Products Cr } K6 Irving Park, Chicago BIG Money Applying Gold Initi Monograms to Process; Cost 5e, Get $1.50 Sample Free ““Raleo,’’ 323 Harrison Ave., Boston, M AGENTS, Big money-making oppx selling Pure Silk guaranteed hosiery Per manent business proposition Mayville M Mayville, N.Y. MAKE your own goods; 1,000¢ guaranteed proposition. Electro ( Q iz ts ‘ AG TS, Be Indepe ndent Se article on the street Costs 0 Particulars free. Fisher Rock cp rt, W BIG Money and Fast Sales—Ever Everywhere—Everyday finds hundreds of for Darn E-Z Universal Fabric Ceme Good exclusive territory still open. D E-Z Laboratories, Dayton, Ohio, Dept. P AGENTS wanted to sell a mt light weight Overcoat and Raincoat t men and boys Samples furnished fre price to consumer $6.50 Cor ior daily—agents easily sell 200 mor E. Morris & Co., 637 Arch Stre I delphia. Pa IMPORTED liquid light pocket | N matches; sensational, be autiful demand Particulars and sample 1181, Washington, D. C SELL ‘“‘Simond’s Safety Seca ( mechanics for Trial dozen $ $10.80 Roman Arndt, 3689 Towns¢ ) troit, Mich EARN $10 to $50 a day in y selling Jiffy Blow Torche ar s Outfits Easy to sell Big Profit \ for particulars to Apex Stamping ‘ » 2, Riverd Til PORTRAIT and picture men wher of bromide prints for portrait wor us. We specialize in unmounted pr proof passing United Print ¢ > Chicago, 1 AGENTS and District Managers Wa manufacturer; sell men's under wearer, wholesale price i Ace Underwear Mills, or AGENTS—Voltaic Electric Insoles; ! sellers, pay handsome prefit; sampie pai Get complete pricelist of moneymakers Electric Appliance _ Co., Burlington, & GET posted—Good prices paid for | flies, insects. See Sinclair display acver'™ ment, page 30 COLLAPSIBLE towel rack (See ad, page 16! sellers. Agents make big profit ‘ Mfg. Co., Elkhart, Ind. Rig ¢ 309 Fifth A \ Garment Hanger 42 POPULAR MECHANICS ADVERTISING SECTION package or bulk for Automobiles; Easy 7 fer washe! wale? graph Cast free

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rchase ning Uy Deal- 70 Wall ere that every unrivaled life POPULAR STENTS occured. Send sketch or model F » examination, prompt report and bere ‘o charge for preliminary advice. we for free Booklet and blank form on oh te e your idea Highest refer- whl ness assured. Clarence A. oer on istered Patent Lawyer, 583 Secur Building. Directly across the ret (f Patent Office, Washington, D. C. fee pag and 151. NEW n beats vacuum sweeper and P ite 8 ents. No electricity required. AD plete ly $2.85 Over 100% profit “ ageots. Write O. P. Morgan, Mgr., 226 Grimes St., Fairfield, lowa. ABSOLUTELY free box Bassett’s Native Herbs sent introduce. For constipation, indigesti rheumatism, headache. Big money selling all or part time. Established 1879 Bassett, Dept. I, Columbus, Ohio. WILLIAMS No Water Hand Soap, in tubes, ha sken Auto owners by storm; washes dirtiest hands perfectly clean without water. Easy demonstration makes quick sales; 0% profit. Williams Co., Box 265, Mont- clair J INDIAN Arterafts, Wagonmound, New Mexico, requires refined agents, hoto- graphs jlars free Re! Se $8.00 TO $20.00 per day. A wonderful wile. Any man, woman, boy or girl can make big wages Selling Crimp Grip Clothes Line Fasteners It is a perfect rope holder and can be used for many purpeses. Crimp Grips are a simple, time-saving device. They t a life time and will not rust; it holds e line tight, and saves time on wash days. Every buyer is a booster. Send ae for Mounted Sample and one pair of Crimp Grip Clothes Line Fasteners. Write for particulars. Crimp Grip Company, Bel- ASTOUNDING invention. Fords use kero- vene, start instantly. Mileage doubled. Big profit. Super, 1306 Fondulac, Milwaukee, Wis AGENTS You can coin money selling r new Fabric Table Covers, require no wundering. Size 56 x 56, prepaid $1.50. 13- piece Luncheon set included Free. Write for sample and special offer. P. Condon, 77 Bedford St.. Boston, Mass. MAKE Big Money Easy in your spare p time. Double profits New Self-Wringing Mop. A Company, 405 St. Paul, Baltimore, Md $100 WEEKLY easy selling ‘Oriental Per- fumes and Cosmetics. Highest profit. Sample Case and illustrated catalogue absolutely free. Romola Parfumerie, Inc., 6546 Cottage Grove Ave., Chicago. AGENTS—Here is that unusual selling ombination, a household necessity which is ¢ simplest, best and cheapest. Write for How t 1ake money. Selfseal Pressure Cooker ‘ Dept. E, Jamaica, N. Y. AGENTS, $10 to $25 a day. No invest- ent. Free outfit Best values. Largest ommissions World Raincoat Co., 659-B Morris Park Ave New York wt ST « ut we manufacture the finest high ol steel household necessity on the earth Millions will be sold. sample 25c, returnable. Box - L Pearl Necklaces. Everybody wants n rite for rock-bottom prices on opal- escent, indestructible pearl necklaces. Star ~y Company, 63 Second Avenue, New or AGENTS—Inste cleans hands instantly; economical, harmless. Free sample; trial package, 1 Spare time agents wanted in every shop and factory. W. A. Marsh, West- feld, N.Y |, AGENTS Specializing on toilet prepara- +r 150 fast sellers, Beauty Clay, Hair Gloss, Toilet Soaps. Colonial Chemicai Co., Pittsburgh, Pa. AGGRESSIVE salesmen wanted to sell our 631 Penn Ave., a meet line of Hosiery, Underwear and Silk nnitted Neckties. Full or Part Time. Liberal vumilesion Pennsylvania Hosiery Mills, 05 Ludlow St., Philadelphia, Pa. ne Profits with Exclusive Territory—$50 ) $100 weekly easy. More has often been nade in one day’s work. A hot or cold - ‘ning water bath equipment for any home t only $7.50. No plumbing or water works required Investigate. Send no money. ‘rite today. Sanitary Supply Co., 709 Allen Building Toledo, Ohio. WANTE D Men and Women to demonstrate and take orders for Presto Pad self-warming ros Ay arry in pocket or use in home; $15 A 20 a day profit for you; your commission res pea! order, paid in advance; we de- liver and collect. Presto Pad Co., A303 W. Chie cago Ave., Chicago, Tl, MECHANICS ADVERTIS.NG TAILORING Agents. Make $50 to $100 a week selling all wool 2 piece suits at $21.50 Also our famous virgin woel suits at $31.50 —none higher. Commissions daily. Beautiful assortment of 6x9 swatches free. No experience needed. Can use spare time workers—if hustlers. Write J. B. Simpson, Inc., Dept. 750, 843 West Adams St., Chicago. MORE Money. Anybody can get it. booklet shows how. Pitts, 561 W. ton St., Chicago. TO secure agents or salesmen or for selling farms and reaching investors, use classified (want) ads in largest newspapers and maga- zines. Price list No. 30 sent tree. Ankrum Advertising Agency, 20 W. Jackson Blvd, Chicago, Lil. The largest classified advertising agency in the U. 8 MAKE $17 daily—Finest Extracts, Products, Toilet Preparations, eessities. Credit for amazing offer. Hastings, Nebr. GET Our Free Sample Case Free Washing- Food Household Ne- Sample Case Free. Write Perkins Products, B-6, ~Toilet ar- ticles, perfumes and specialties. Wonder- fully profitable. La Derma ( Dept. A, St. Louis, Mo. AGENTS—Clever Inventivn! Inkspeon makes every pen a fountain pen. Fast office seller; big profit, demand increasing every- where. Exclusive territory offered. Sample free. Tribune Bidg., H. Marui Company, New York, N. Y. ‘AGENTS: Big returns, fast office sellers; particulars and samples free. One Dip Pen Co., 2 Daily Record, Baltimore, Md. WHY Work for others/ Start and operate your own business. Quy system proprietary specialty business offers wonderful opportuni- ties to make $100 to $509 weekly. Openings everywhere. We furnish everything and show you how. klet free. National Scientific Laboratories, 208 Monroe, Richmond, Va. DU STLESS Sponge Cloth. New Invention. Retails (50c)—costs (16c). (1) Rub Cleans, Polishes Automobiles, Pianos, Furniture. NuLife Sponge, Hartford, Conn. CALIFORNIA Rosebeads selling like “hot cakes. Agents coining money; new stuff. Big profits. Catalog free. Mission Factory PM, 519 No. Halsted, Chicago, Ill START your own business as our sole agent. Selling 100 famous home products. All or spare time. Dr. Blair Laboratories, Dept. 524, Lynchburg, Va. BIG money and fast sales—every owner buys gold initials for his auto You charge $1.50, make $1.44. 10 orders «ily easy. Samples and information free. gram Co., Dept. 73, Newark, N BRING Home the Bacon—selling Stuart’ 8 “Norid Mono- J Stain Remover. Removes ink, iron rust, grass and fruit stains. Write for free samples and terms today. C. H. Stuart & Co., 5967 Broadway, Newark, New York AGENTS Coining Money applying Mono- grams on automobiles; you charge $1.50, profit $1.40; $15 daily easy; experience un- necessary; free samples. Worcester Monogram Co., ._ Worcester, Mass. CLARKE made $18 an hour selling vest- pocket windshield cleaner needed by every autoist, motorman, engineer; one rub keeps glass clear 24 hours; 90,000 sold; amazing proposition free. Security Mfg. Co., Dept. 735, Toledo, Ohio. $200 WEEKLY. Agents, State distributors. Wonderful new patented Ford accessory. Mosedale, 25 North Dearborn, Chicago GET into the Big Money Class. Make $15 to $25 daily seliing the famous guaranteed Hamilton Hosiery from Mill to Wearer. Selling outfit free. G. M. Hamilton Corpora- tion, 11 Barrow St., New York. EARN $50 to $75 weekly selling our beauti- ful umbrellas. Splendid value makes rapid sales. Every sale nets $1 commission. Write for particulars. A. E. Erasmus Specialty Co., 305 Broadway, New York. $60-$200 A WEEK. Genuine Gold Let- ters for store windows. Easily applied. Free samples. Liberal offer to general agents. Met Ilic Letter Co., 438-D, North Clark, Chicago. AGENTS sell Wolverine Laundry Soap Wonderful repeater and good profit maker. Free auto to hustlers. Wolverine Soap Co., Dept. B37, Grand Rapids, Mich. AGENTS make 500% profit handling Auto Monograms, New -Pictures, Window Letters, Transfer Flags; Novelty Signs. Catalog Free. Write Hinton Co., 1153 No. Wells, Chicago. HANDY Men!—Permanent, profitable busi- ness; needed everywhere. Calhan, 52 Levant, San Francisco, Calif. 41 S2eLiON WE cliver the cood Agents. to orders for a patented househvid necessity, Tested and approved by Good Housekeeping, Modern Priscilla, New York Tribune Insti- take tute. Dundee Mfg. Co., Inc., 17 Hdinbore St., Boston, Mass “MARV ELOU S Ink, Rust, Stain, Spot re- mover, 25c tubes, 150% profit Livest house in America for agents. Jct Pharmacal Co., Allentown, Pa AGENTS—Men and Women Establish a permanent business. 34c money order or check brings sample of a wonderful Gravy and Stew improver. Try it yourself and be convinced. Every home a prospect Every sale will bring repeat orders A vew article with a big future. Exclusive territory to live agents Smith & Gray, Guinda, Calif AGE NTS sell made to measure gabardines, whipeords $14.50; reversible raincoats; $75-100 weekly. Outfit free. Standard Rain- coat, Dept. 5, 129 W.. 17 St., New York ~ AGENTS—Best seller: Jem Rubber Repair for tires and tubes; supersedes vulcanization at saving of over 800 per cent; put it on cold. vuleanizes 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 ) Bldg., Philadelphia, Pa., Dept. 505 AGENTS clear $50.00 weekly selling Opaline Portraits. Expense money ad- vaneed. (reddit given. Big line now ready Samples and Catalog free Consolidatee Portrait Co., Desk 2, Chicago PATENTED Cigar Lighters with Glass Advertising Front. Als Electric Cigar Moisteners. Wonderful Sellers No Com- petition. Big Steady Profits. Proof, Cuts, Sales Plan Free. Drake Mfg. Co., Dept M Milwaukee, Wis. WE have the finest needle case $50.00 to $200.00 weekly. Send 10c for sample; sells 25c. Empire Specialties Co., 1549 N. Wells, Dept. 301, Chicago. AGENTS get Klosquik the newly invented door spring. Whirlwind selier Retails for 50c. You make 100% or more. Sell 50 to 80 a day easy. Write for 45c sample and easy starting offer. Klosquik Mfg. Co., Dept. A, 17 West 42nd St., AGENTS Big Transfer Method. New York money Monogramming by Catalog Showing Over 50 Styles and Particulars Free Motorists’ Access ories Co., Mansfield, Ohio SELF - THREADING _ Needles, Needle Rooks, Machine needles, find sales in every home Fine side lines, easily carried, hig profits, sample and catalogues free. Prentice Lee, 145 East 23rd § St., New. York YOU can » sell-e every y merchant in town our changeable signs. Large profits; easy sales Write for territory now Changeable Sign Co., 581 East 102nd, Cleveland AUTO owner tire agent wanted each le- cality to wse and take orders for handmade Mellinger fabric and cord tires; guarantee bond 8,000 and 12,000 miles (no seconds); shipped prepaid on approval; get your tires free; no capital or experience required; make $100 to $300 weekly. Write for whole- sale prices and sample kit. Address, Mel- linger Tire Co., Dept. 200, Kansas City, M WONDERFUL! Startling! Amazing! Our Ex-Cel Luminous Crucifix and Magieal (Luminous) Necklace shine brilliantly in the dark. Sel! on first demonstration. Big profits to you, Write for further particulars, or better still, send for sample and territory protection immediately. Crucifix $1.50, Necklace $1.00, postpaid. W. G. Hannan Co., Dept. B, 57 E. 18th St.. Chieago 75 WEEKLY Selling Nustile Guaranteed Hosiery. Your pay daily. All styles and colors; also Pure Silk, 4 pairs, 5.50 Special monthly bonus Sample outfit furnished. Nustile .Hosiery Mills, Dept. 175, Whila- delphia, Pa GOLD Mine for Salesmen. New invention, a complete outfit, Washes and dries windows, sweeps, scrubs, mops, etc. Costs less than brooms. Over 100% profit... Greatest year ‘round seller. Write. Harper Brush Works, 132 2nd. St.. Fairfield, Towa IF you want good Itve agents—fellows who can get the business—ask me others are doing ft. P'N gladly ‘render’the necessary -as sistance Geo. F. Baker, “Mer. Classified Ad- vertising, “Popular Mechanics Magazine, C “hicago AGENTS: A sale in ‘every home for ovr beautiful dress goods, silks: and general yard goods. 4juick sales! Big profits. Large beok of nearly 1,600 handsome fabric samples ftur- nished teragents. Write. today. National Im- porting & ‘Mfg. Co., Dept. 6X, 573 Broadway, New York, N. Y.

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42 POPULAR MECHANICS ADVERTISING YOU can be your own boes with our Key- EARN $10 daily Silvering mirrors, plating Check outfit. Good for $5 a day stamping and refinishing metalware, autos, chandeliers, mames on pocket key checks, fobs, etc Sample bedsteads, headlights. Outfits furnished. E eheck with your name and address, 20 cents Decie Laboratories, 1133 Broadway, New Pease Die Works, Dept M. Win hester, N. H. York. SELL Madison ‘‘Better Made”’ Shirts direct WANT Distributing Agents eveywhere from our factory to wearer. No capital or ex- for Hanslick, the new original powdered perience required. Easily sold. Big profits handsoap. Removes grease, grime, ink, Write for free samples, Madison Mills, 503 | paint, and most anything from the hands Broadway, New York. 2 without injury to the skin Every me- AGENTS——Sell “Instant Shine’? Metal Poi- | chanic and auto-owner, everybody who ishing Cloths, 25c; costs 7%4c. Sample free gets his hands dirty will be a customer Instant Shine Polish Company, Utica, N.Y A great opportunity for a hustler to get - . —— — in business for himself Full informa- FORMULAS — Dependable manufacturing tion free Send 10 cents, coin or stamps, formulas with complete working directions for liberal sample can Solar Products Charges reasonable. Write me. §S. Viggins, Company, 122 West Lake Street, Chicago. Chemist, 135 Meadow St., Pittsburgh, Pa. —— _ MAKE $25 to $50 Week. representing CASH In on this quick seller. Wingo

; : Clows’ Famous Philadelphia Hosiery, direct eare { I R She - “ . —_ aoe oe ped ty ay from mill—for men, women, children. Every § ; y, ‘ 3 ai ric. ° q Applewhite, also inexperienced, six orders in palr guaranteed Pric es that win. Free book thirty minutes. No end to ready buyers. Ex How to Start’ tells the story George Clows elusive territory for quick workers. Be first Company, Desk 31, Philadelphia, Pa. rage cee Company, 159 Allen SELL Necessities.. Everybody needs and ee 5 080Go, Ohio. ae buys the “Business Guide.’” Bryant cleared YOU can make $75.00 to $100.00 a week $200 00 in July Send for sample It’s selling our big line of 150 articles, used con- free. Nichols Co., Box 4-B, Naperville, Ill. stantly in every home. Write us, we will send you our handsome $15.00 Sampie Case Outfit HIGH-GRADE SALESMEN WANTED on trust. Federal Pure Food Co., Dept. PP, Chicago - BEATS Owning a Store. “This new way of BIG Money and Fast Sales - Every owner selling beats owning a store Any earnest buys Gold Initials for his auto. You charge worker can easily make $4,000 to $5,000 a $1.50; make $1.35. Ten orders a day easy. sear net without investment or financial Write for particulars and free “sample risk,”’ says William Garden, former mer- American Monogram Co., Dept. 40, East | chant who started with us two years ago. Orange, N. J. Other former merchants now happy and pros- : perous with us are De Longe, Pack, Carter, EXCLUSIVE agents $225 weekly Genuine Bogen, Lee, and Puck. They earn as much or gold letters for store windows. Free sa uples; | more than ever; have no investment er finan- selling instructions. Chicago Window Sign celal worries and are building a constantly System, 6226-A Kimbark Avenue, Chicago growing business We are now making the LIVE Agents make $10 day selling Eureka best suit that we ever produced retailing at Strainer and Splash Preventer for every $51.50. Our values are remarkable Our fit water faucet. Takes on sight Widely adver- and style so good that you can sell the best tised and known. Get details today. A B trade. Every fabric is virgin wool. Every gar- Seed Filter Company, 73 Franklin, New York. ment tailored to order, Our all wool summer suits retail for §2!.50, Both the $31.50 and AT Last—World’s Greatest Adding Ma- $21.50 lines are red-hot seiler; We have chine. Almost human. Retails $15; work openings for men who afe lookin for a per- ecuals $300 machine. $500 monthly easily manent connection ang have th courage to de- made, demonstrating to stores, offices, ga- pend solely on their own industry for success rages, factories. Simple, easy; adds, sub- Such men will find a wonderful opportunity tracts, multiplies, divides automatically. wit ; rd ; > ith us Write for full information Dept. Speedy, accurate, durable, handsome. Five 800. J. B. Simpson, Inc., 831 Adams St year guarantee. Tremendous demand, Chicago 5 r . 7 . amazing profits. Liberal trial offer Pro- . tected territory. Write quick. Lightning Cal- Cs aeaticeediiiat - a culator Corp., Dept. F, Grand Rapids. Mich. 4 _DIGNIE IED Side Line with Splendid : AGENTS—Stamping names on Pocket a poy = — ae coe po ut : . nes oc! who are selling both arge an sina uUSiNess Key pe sample oe ee Foon establishments, and who would like to in- mame and address, 25c. stamping Outfits, crease their income through the sale of 4 Emblem Checks, Check Fobs, Name Plates. most distinctive line of greeting folders, Hart Mfg. Co., Desk 2, 303 Degraw St., | cards, gift certificates and announcements, Brooklyn, N. Y. prepared exclusively for business establish- MAKE money silvering mirrors, all kinds pve Beautiful sample book of 45 subjects plating, knives, spoons, auto headlights. Out. | ©an fe carried easily in your portfolio. Sales fits furnished. Free booklet International possibilities are exceptionally good and an Laboratories, Dept. 25, 311 Fifth Ave., New sand dollars, cme e cate yn le = 8 ork. Sar aoilars , 1Tro 1 6s } is “INSTANT Weld z ; artistie and distinctive Product In order to NSTA) eld. epairs largest punc- qualify give information as to your present ye —- or > } 3 np work, sales ability and character. Write J one day, $56. rite quick. ree sample; J. Sher, Federal Art Guild, 508 So. 4th St., territory ,,Saine at. Tourists’ Pride Mfg. Minneapolis, Minn ‘ Co., Des » Minneapolis, Minn. ~ _

POLMET—The Wonderful Polishing Cloth MAKE $75.00 to $125.00 a week selling that cleans all metals without liquid, paste | our strictly All-Wool Made-to-Measure Suits or powder. Approved by ““Good Housekeep- at one amazing low price You _ collect ing’’ and ‘‘Modern Priscilla’’—sells fast at profits in advance and keep them We sup- 25c. Sample free. Gale & Co., Inc.. 15 Ed- | Ply finest selling outfit in America, showing inboro St., Boston % ‘ powerful assortment of over 100 Virgin Wool

——_ Fabrics, more than 75% of which are fine WE start You Without a Dollar Soaps, long-yarn Worsteds and Serges Also big

Extracts, Perfumes, Toilet Goods Expe- assortment of summer-weight fabrics, rain- rience unnecessary. Carnation Co., Dept. coats, and other exclusive money-making 201, St. Louis. features. Tailoring, raincoat, and side-line ~ ae - - = men, part or full time, get in touch with us HOW to Sell Patents free. Patent immediately. Goodwear Chicago, Inc., Dept News-O, Washington, D. ¢ 924, Chicago MAIL-ORDER houses and distributors ; we pack big profit beauty creams, face powders, Fightes notes ae Something a Fire Derfumes, toilet preparations with your label. ‘eter sells easily a home eeetacular Chemist, 9444 No. Clark, Chicago demonstration; car owners, homes, factories, pn Rt ne ao . stores, practically buy on sight Our men

AGENTS: Big profits. Best and cheapest make $10.00 to $50.00 a day: exclusive terri- window letters made. Easily applied. Dime tory. If you wish to establish a business of brings five samples. Particulars free. Stai- your own with unlimited possibilities for brite Co., 1115 Second Ave., New York. making big money, write us today Fyr- —; ——— —— - ‘yter Co., 13 Fyr-F dg., Dayton, i EARN big money fast applying gold ini- Fy mal. Fyr-Fyter Bldg Dayton, Ohio

tials to autos. Every owner buys—$1.35 WANTED Salesman—in each locality with profit on $1.50 sale—particulars and samples Ford car to show and sell Grey Goose Shock free - Write quick. Lithogram Co., Dept. Absorbers Easiest riding Absorber of all 17, East Orange, N. J. time. Quickly attached They double spring

2 gee length—lessen spring breakage, and look like EASY, pleasant work for Mechanics. Shop | a part of the car. Agents making big money Men, Clerks, during spare hours; will add om our liberal commission offer A ride many dollars to their salaries Also want makes a sale. Priced within easy reach of Dersofis io can give full time Big wages e ery Ford owner. Write for agency proposi- assured Novelty Cutlery Co., 67 Bar St., tior Jenkins Vulcan Spring Co., Dept. 19, Canton, Ohio. Richmond, Ind.

SECTION SELL Coal in Carload Lot Ss line. Experience unne essary, | - male pay in an hour. Liberal drawing apt! arrangement Washington Coal a9" 827 Coal Exchange Building, «7 =" ’ You Desire Further Informatior ~ A. Big Ad Page 161 ry REPRESENTATIVES Make Pp j Mint Jealous Automobilists 5 ‘a Exclusive Territory Free’ Po, si Investigate Wizard,"’ Roct ' SALESMEN— Make big m Nationally known Armstrong (Ca ‘ - once for information Armstror Co Marion Bidg., Cleveland, Ohj D B DO you believe in yourself the philosophy of success Y: rd work? If so, here is your chan, > a company which is made to y mur order ¥ can develop your earning power ' ‘ your savings account at the sa Aler- ander Film Company, 3389 s Broad Denver, Colo WANTED—First Clas« Specia ~ to sell patented Automatic Tire | garages and service stations W, for sition. Phoenix Products Company, Box 3 Phoenix, Ariz STOP Right Here. Make rea ; summer. Week’s salary often a sale. Look at our salesmen’s mor ages: N. Y. man, $600.00: N. Da sma $500.00; Ind. man, $750.00" ar i Y call on business men only Introd new proposition. No competiti R ritory open. No collections N j You take orders—we do the rest \ get complete dope National <A Z Service. Inc., P. O. Box 73. La G ind SELL Advertising Pencil B Peerless Novelty Work 740 Hod ) ton. Ohio SALESMEN Pocket Sample { 9 Oak St., Charlestowrs, Ma $100 WEEKLY selling One-M Tire Changer to car owners, garage t bus lines, ete. Simple—sure : on sight. Big sales records Ma ful demonstration Exclusive. Wi start Write Dept. E, R-M M r ‘ Riegel St. Dayton, Ohio THE Telabak, a time saver 1 i Ssomely polished metal: has pat veying information; dial and ha ing time of return; receiver f all under lock and key Pla attach to door $5.00 deliver mission to high-grade sales ’erkins Indicator Co., Guymon, Okla SALESMAN: If You Think f $6,000 This Year, Write Me Si; f store line Advertised nationa lished Company Liberal week producer. The Continental Co ’ I 1 Ave., Cleveland, Ohio, Dept. 20 GIVE customers $100 value S100 Your profit $6.50. Ukollect Ss New Orleans, La RETIRE in five years selling gum machines, Six balls ( 100% profit Color circular P Co., 273 20th St., Milwaukee. W SELL. $1.00 Radio Guarar Sets; Sample Set $1.00; Dozen & paid Southern Co., Box dD. ¢ PAGE 560, April Nurber i product Salesmen coining mor Aci proof Ink Co., Nicetown, Phila Pa SIDELINE Salesmen and Wanted, to sell Wollo Spark P gasoline, keeps down carbon, fire sucker Liberal commissior Write Wollo, 3328 Olive St., St SALESMEN Wanted—To inter ture and department stores in on a splendid proposition for relia facturer You can earn $100.00 a more, in full or spare time, o Interesting, steady work Wri for full particulars. The Marvel (o., H i In WORLD'S Fastest Selling Aut \ r County distributors wanted: write G W. Spring Oiler Co., San Di MAKE $100 Weekly in Spare 1 what the public wants—long dista rad receiving sets. Two sales weekly | 5 profit No big investment, no ca N Sharpe of Colorado made $955 in " Representatives wanted at once tT is sweeping the country—write toda ’ your county is gone. Ozarka, 802 W ton Blvd., Chicago SALESMEN Can make $5.00 a ¢ ing our Calendars, Pencils, Sign tising Novelties, Yardsticks, Whi Liberal terms. Sells entire year. » side line. Local and traveling agent er Calendar Cv., Dept. 226, South Be

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POPULAR MECHANICS ADVERTISING SECTION 43

le OF main eiLESME” Make $50.00 weekly taking $4.00 PROFIT on Every $5.00 sale. SELL your spare’ time—$2.50 per hour— ATT Week's = envelope *"y tags and “Free Sample’’—New Specialty. (Money Your Pay Daily Pleasant, profiiable, easy & account - ideline & Sons, Getter.) Every Storekeeper, Doctor, buys work near home, writing orders for Mac-O- Lae pa ra F ive., Chicage quickly. Experience unnecessary. Territories Chee New Style Guaranteed Hosiery No ‘cago. If a. FUI ee open. Box 596, Hartford, Conn. capital required—-No experience necessary— . } $117 to $250 mont! Steady work. Short tute, Dept. K-20, Rochester, Y \LIFORNIA Rosebeads selling like hot ¢ 6 3% a a. , . I -~ t coining money yr #-- hours. Paid vacation. Influence unneces- MEN Wanting Forest Ranger and railway et a ‘atal f Misst sary. Write immediately—for schedule of | ™mail clerk positions, write for particulars. 4 e pew. Big rofits Catalog free. Mission _ Ree te r 2 Mokane, B-12 P , Inflator fa . 1 Da uy spare time selling only one policy a $35 week. Earn while learning Write MAKE ow writing | Photo-plays; | de- , F . 72 “ -~ tails free to beginners No correspondence a Five policies a day pays you $730 Franklin Institute, Dept. K-401, Rochester, course Producers’ League 230 Wain- . 2 he au 1 ‘ ee ° ‘ a I y pays $5,000 death and $25 N. ¥ wrieht. @. Louis enefit for sickness or injury. Total RR \ILWAY Mai . . 9° = - ‘ : . é Mail Clerks, 1,600-$2 300 , awe 1 3 Tir 1 $10 yearly. You get amazing results us- yearly. Postoffice Clerks and aie Pi 100- WHY work for others? Start and operate may g our Direct-by-Matl Selling Plan Ad- $2,000. Customs, Internal Revenue, and yout own business. Our system proprictary ells : j iters, Dept. RL, Bonnell Bidg., many other positions open. Vacations and specialty ge FX ey wentornet gy ond - Ne NJ sick leave with full pay. Common education ties to make $100 to $500 weekly. Open- ~ : - : sufficient. Experience unnecessary. Write ings everywhere. We furnish everything and WANTED—Tailoring Salesmen, make $60 immediately. Chicago Civil Service College show you how. Booklet free. National Scien- ‘ w $125 per week. Liggest merchants in many -41 Kesner Building, Chicago . tific Laboratories, 208 Monroe, Richmond, Va wns have started with our line We are the 5 EARN $10 daily silveri irrors lat i largest made-to-measure tailoring house in the $5 “TO $15 daily in advance—No lay-off s— : inishi aarty B Seems Sears — 7 a 4 nishing elaborate sample equip- Monthly bonus besides. Muir made $415.20 anc ref nishing metalware, autos, chandeliers, , a ding 500 all-wool fabrics You in 24 days. Send for sworn proof. No ex- bedsteads headlights. Outfits furnished. E age make your own profits from $8.00 to £15.00 cn perience or capital required, Introducing Decie Laboratories, 1133 Broadway New York r tart er. Guaranteed absolute satisfaction Latest Style Hosiery. 7 pairs guaranteed 7 MEN—Boys. Become Railway Mail Clerks Big co perfect fit, best workmanship, or no sale. months. 53 styles, 29 colors. Spare time $135 month. Write immediately. Franklin Perkins Write for line and all accessories te be sent satisfactory—Just show samples we furnish. Institute, Dept. K-20, Rochester, N. Y free Tell us all about yourself. Address | All colors—grades for Men. Women, Children MEN—Age 18-40, wanting Railway : * ~ Ansaes os ae > 4% Write orders. We deliver and collect eae ~ , S = eon I y 0. Perry, Sales Manager, Box 483, Chi- Teanenestation dshanees said Tear Par Station-OMmce positions, $115-$250 month, : ago, Tl ‘ Daily. Macochee eh Room free transportation, experience unnecessary. j ‘7% SELL Advertising Specialties. They move 4726. Cincinnati. Ohio a Baker, Supt., 74 Wainwright, St. . I i fast. Good men easily make $100 weekly. GET posted—Good prices paid for butter- . = a Write today fer full particulars 8s. G. flies, insects. See Sinclair display advertise- ALL men, women, boys, girls, 17 to 60, : Silver Chamberlin Company, Clayton, N. J. | ment, page 50 willing to accept Government Positions, $10.0 : MONEY Pobad a Silveri $117-$250 traveling or stationary. Write Mr New EVERYONE Buys Every Day some part of PF on ay ant on ty a ig 30 a ee Ozment, 101 St. Louis, Mo., immediate! our line. You ean take orders for complete Works, 2604 East 40th, Kansas City, Mo WANTED Railway Mail Clerks—$1.#00 . a ine of groceries, paints, roofing, motor oils, . : : to $2.300 Exams everywhere. Write today Ju t res and radio sets, from institutions, board- INVENTORS desiring to secure patent for full information. Patterson, Civil Serv- Gum In ses and private families. We de- should write for our book “‘Hew to Get Your ice Expert, Box 4025, Rochester, N. Y I and collect Our goods are nationally Patent,”’ tells our terms and method Send . : , - , known and guaranteed quality; just show sketch for our examination and Instructions OUR genuine gold window sign letters ~~ mples and secure large orders. No capital without charge Randolph & Co., Dept. 418, are an excellent money-making proposi- , r selling experience necessary Heavy fe- Washington, D. © tion for handy men Slann Sign System, ter ake , 7 7 sine tethune Ave. E., Detroit, Mich vake a steady profitable business. * “ Hitchcock-Hill Company, Dept. 226, WRITE articles, stories, news, in spare INFORMATION mur £ Reference: any bank or express ee en ee “yan oe Svr ii i nan ’ - > 00 ' 5 ss SYNdIi- - ° " . . . = ompany er os2 Be eaie Sie ' ACCURATE, detailed information. Lit- ‘ \LESMEN sell : k antes Tatas i ree eonncononen erary, scientific, subjects, $1.00. National se sales and order books UNDREDS men. 18 | up. wanted as Rail- Institute, Springfield, Ohio auto. reg. rolls and bill ladi I i : Saves » Lit oral aa ms a ye way Mail Clerks 133-$192 month. Com- COMPLETE information on any book pub- tail Book Coe egal commission. Wirth Sales | jon education sufficient. List positions free. | lished. Or will supply lists of books that > ' ; cago. Write immediately Franklin Institute, are the best on any subject Information M TRAVELING Meleemen calling on retedi Dept. K-20, Rochester, N. Y. _ is free. Room 805, Popular Mechanics Build- t wanted by large manufacturer to STORIES, poems, plays, etc., are wanted | im. Chicago, Ill alit y inique line of business-boosting articles. for publication Good ideas bring big COMPLETE, accurate, information on any i al d, fast selling, main or side line. money. Submit manuscripts or write Liter- subject $1 National Information Bureau, et =, rning $150 weekly, address Elsaser | ary Bureau, 522, Hannibal, Mo 1429X Milton St., Grand Rapids, Mich “a AE $60-$200 A WEEK. Genuine Gold Let- | GUARANTEED information, any subject, i — ESMEN—Sideline pays five to ten | ters for store windows. Easily applied. | strictly confidential, $1.00. | Doris Chemical dollars a day taking orders for Specialty Free samples. Liberal offer to general ~ evaserten, East Cleveland, Box 59, Cleve- = Sticker gummed advertising and Match Rox agents. Metallic Letter Co., 438-C. North — : ickers : Write for proposition, samples, Clark, Chicago. BUSINESS SERVICE Vand, ti, Beardsley’s Printery, Rock | ~“PINGER Print Experts—Excellent paying : : . — —~ Ming ; DELAWARE Incorporator. Charters; Fees Sel positions; particulars free Finger Print cat Gee Cae 2. 901 Or: + oe WHY Work for others? Start and operate | Headquarters, 188 East 79th, New York ag Wilmington Dea paESE, Vel Cranage sys $100 pectane omnnaes. Our system proprietary ~ SILVERING Mirrors, French plate. Eas- aa - Z ties to asiness offers wonderful opportuni- | iy jearned; immense profits. Plans free. TYPEWRITERS AND SUPPLIES Gn to nake $100 to $500 weekly. Openings Adivees, Weer Mirver Weeks, Maccieler —— —- - ; os e “. ere. We furnish everything and show Springs. Mo TYPEWRITERS All Makes. Save one-half. Ree jou how. Booklet free. National Scientific : Fm 00 Thoroughly rebuilt in our factory by the ; . Laboratories, 208 Monroe, Richmond, Va. MEN Wanted— Molding finishers, decora- famous ‘‘Young Process.”’ Fully guaranteed. REST Sp ters, sign painters Discovered a wonderful Free trial We handle all standard makes. and r= Seller: Jem Rubber Repair for tires | bright burnish bronze finish; it’s inexpensive. Cash or sold on easy terms. Write for Cat- lay se Seana — vulcanization at saving | Write W. J. Crake, Ft. William, Ont., | alog. Young Typewriter Co., Dept. 5026, Adver a ner B00 put it on cold, vulcanizes itself Canada. Chicago, les. et two inutes, guaranteed to last life of tire —— —— side ibe; sells to every aute owner and ac- COVEREMENT Jobs, $1,140-$3,000 year. TYPEWRITER fer Sale Cost $100 Model ory dealer yet partievlars how to make Men—Women, 18 up wanted. List positions will sell fer $25. Machine guaranteed—will nd. Ind - ev and free sample. Amazon Rubber free Write immediately Franklin Insti- ship on trial. Address Galbreath Company, Philadelphia, Pa., Dept. 510. tute, Dept. K-20, Rochester, N. Y¥. Rogers, Ohio,

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aad POPULAR MECHANICS ADVERTISING UNDERWOOD Typewriters — only $3.00 down Easy monthly payments Low prices at less than manufacturer 10 day free trial Rebuilt, all worn parts replaced Just like a new machine »-year guarantee ¥. \ite for big free catalogue A-151. Shipman-Ward Mfg. Co., 1514 Shipman Bldg., Chicago, In TYPEWRITERS all standard makes, $ up. Fully guaranteed Free trial Writ for complete illustrated lists Northwester Typewriter Exchange, 121 N. Francisco Ave., Chicago TYPEWRITING EXPERT Typing: 50c per 1,000. 741 Brady, Davenport, lowa MAILING LISTS WE have the list you guaranteed Gordon Company, 682 Picker- ing Bidg., Cincinnati $55.00 BUYS 5.000 addresses of and business men Now ing time 100% correct H. J. Payne, Jackson, Tenn ADDING MACHINES NEW $3.50 Adds, accurate, anteed Perkins, want Accuracy Ministers sold first Box 193, Automatic Adding Subtracts, Multiplies Capacity $999,999.99. Fully guar- 75,000 pleased users Makes adding easy, positive, quick Eliminates Mistakes Raves Time Postpaid $3.50 Bassett Co., 1458-K_ Hollywood Ave., Chicago FREE Trial. Marvelous new Adding ; Ma- chine. Adds, Subtracts, Multiplies Divides, automatically Work equals $550.00 ma- ehine Price only $15.00 Speedy, durable, handsome Five-year guarantee Used by largest corporations. Write today for cata- log and free trial offer. Lightning Caleu- lator Co., Dept. E, Grand Rapids, Mich DUPLICATORS AND DEVICES STENCIL Duplicating Outfit $1.00 Prints Typewriting etc On Approval Primos 3-M, Primos, Pa. YOU can make 50 to 100 letter, notice, etc., on a Heyer Quality free trial offer. 14 8S. Wells St., ~ “MODERN” Machine Absolutely $2.00, $5.00 Handwriting, Specialty Co., copies of a at a cost of three cents Duplicator Write for The Heyer Duplicator Co., Chicago, Til Duplicators save Time, La- bor, and Money. Gets business Reproduces Typewritten or Penned Letters, Draw- ings, Lessons, Music, Menus, Bids, Notices, Specifications, Maps or anything in one or more colors Prints Two per minute. Spe- clal Sale On. 30 Days’ Free Trial 2.25 up. Booklet Free J. E. Durkin-Reeves Co., Pittsburgh, Pa PRINTING, ENGRAVING AND MULTIGRAPHING MONOGRAM Personal Stationery Two-fold Linen stock, 100 in a set $1.00 Sample Free. Blackhawk, 5057-9 Addison, Chicago 20 LB Hammermill Bond Letterheads 500 $2.30—1,000 $3.00—3,000 $8.50—5,000 $13.75 Postage prepaid Envelopes 10 per cent less We print anything Work guar- anteed. Samples furnished. National Print- ing Company. Goshen, Ind MULTIGRAPHING, Rates reasonable Gordon Pickering Bidg Cincinnati 5,000 6 x 9 CIRCULARS $8.50 5.000 3 x 6 circulars $4.00 our specialty Write. bia, Missouri AUTOMATIC Press just installed—Special low prices on Circulars and Folders—all sizes 1,000 to 100,000 up. Good’s Printery, Harrisonburg, Va ah i PRINT Celluloid advertising novelties in your shop Easy, Simple process Direc- tions and illustrative pieces, $1.00 postfree Guy Milner, Fairfax, Calif ““NEARGRAVU RE"’—It’'s Letterheads $3.50 prepaid. nd. PRINTING- addressing, folding Company, 6382 postpaid: Circulars, folders Saxon Press, Colum- ‘Different Solliday’s, 1 000 Knox, —500 Letterheads $1 50. Send stamp for samples. Place, Harding, Mass 10,000 MILK bottle stoppers printed to our order $5.00 Samples on request. Muncie Bottle Cap Co., Muncie, Ind mas 1,000 HAMMERMILL Letterheads or En- velopes, $4.00 Full Line Samples Free. Quality Printshop, Marietta, Ohio = 500 EACH Letterheads, Envelopes, $5.00, . 0. D. Jacobus Service, Irvington, N. J AUTO MA ATIC Cardpresses prints 100 eards minute Information Habben, 3127 Locust, St. Louis. a 1000 20-LB. Bond Letter Heads, name and eddress, $2.75 postpaid E. Fowler, 365 State Street, New Haven, Conn. free STICKERS—We label everything on earth Before buying Gummed Labels, consult our catalogue Clarence Howe, Vineland, N. J BARGAINS in Quality Printing—1,000 Letterhead $4.00; 1,000 Envelopes $3.50; 500 Cards $2.75; 1,000 4-page folders $8.50 Postpaid. Cash te order. Quick Service Sample ree Padberg, the Printer, Dept 4,’ Freeport, IIL 00 EACH, letterheads prepaid, ird = zone Printer, Watertown, S OUR Specialty Is Letterhe Circulars, Pamphlets and Catalogue oF Prices. The Shenandoah Press a envelopes, $4.75 Samples Mathews, E n velopes, Write Dayton, WE print Stationery, Circulars, Campaign Commercial Press, 100 8% x ll envelopes, $1.10. N. D Booklets, printing Batavia, Ohio BOND letterheads and 100 Drewton, Box 1051, Fargo, Catalogs, Samples. ~ CATALOGUE and Job Printing. Get our estimate on your printing needs Smith- Roberts, Watseka, Ill 500 TWO-COLOR Sample free Indianapolis. 225 BOND letterheads, cards, $1.25 each nomic Press, QUALITY Tell us your Money -Saving Letterheads ‘Superior’, 1825 $2.75 Roosevelt, envelopes, biliheads, Combination, $4.00. Eco- Leonia, N Printing! Reasonable wants and let us quote our prices Best Work We print anything Ernest Fantus, 525 South Dearborn Street, Chicago PRINTING Outfits—Presses, type supplies, type novelties Send stamp for catalogue. Model Press, York, Penna PRE-USED Printing Presses, supplies. List for stamp. Richland, Pa 250 LETTERHEADS, 250 white envelopes, printed and mailed, $3.00. Samples printing free. Sunco, Mohawk, N. Y 1,000 LETTERHEADS or Envelopes, $3 $3.00. Sent Prepaid. Samples Free. Monitor Press, Morrisville, Pa FOR SMOKERS Wonderful Havana Smokes for $1.00. Factory-to-Smoker System saves you half Enjoy genuine cigar-comfort in guar- anteed ten-cent value. 2.50 for 50, Postpaid $1.09 for trial box of 20. Send name and address, pay Postman and be convinced Montrose Cigar Factory, 4004 Montrose Av- enue, Chir ago, GENUINE “Hewlett” London Hand Made at import prices Write for circular cialty Sales Co., Greeley St., Milvw aukee RA red leaf tobacco, od. Best chewing, 3 Ibs., 25. Mild smoking, 4 Ibs., 2.25 ’, postpaid 0. D Prices! Type and Popular Bargains, TWENTY quality guaran- $1.00; 10 Ibs., $1 00: 10 Ibs., Collier, Agent, Mar- c yilier is reliable. Martin Bank, Cashier tin, Tenn Ra aymer FOR MEN ARE you old at forty? See our advertise- ment on page 146 of this issue. The Electro Thermal Company, 2134 Main St., Steuben- ville. Ohio BOATS AND LAUNCHES $5.00 Harbor Springs, MAKE rowboats _ sail, Centerb« yard Mfg s ~ 16-FOOT Graham Mic h made. Con- Weesho-Uco., Rowboat—easily struction blueprint 30c¢ West Market, Detroit, Mich NEW Boat Book telling how to make 21 kinds of boats Also many other helpful ideas for those who like boats Profusely illustrated 50 cents Popular Mechanics Press, Room 806, Popular Mechanics Build- ing, Chicago, ~ B that always go Ford Boat 296B BOATS Ford Engines Harry Rider, walk, Conn. MAKE your own Build Construction aba, Mich ~ SP EED Boat for small engine. directions 25 cents plans and books Street, New York City “HOW to make your boat leakproof.’ for booklet. L. W Knecland 8St., are propelled by Sooklet sent free Commercial Bldg.. Nor- Easy to Escan- ” Row boat from Prints. Box 160, ~ Plans and catalog of boat Rudder, 9 Murray ** Send Ferdinand & Co., 152 Boston, Mass RAZORS AND BLADES BLADES, resharpened, one edge 2c; double Se. New York Edge @o., Glen Cove. N . # ~ BLADES resharpened, 3c any make; guar- anteed service. Standard Safety Razor Corp., Pittsburgh. SECTION OPTICAL Goons Ls Cowes compasses $1.50 ‘ 22.90. G. Walke 5 Ohie i | ss bn ES POWERFUL binoc ular Walker, Box 633, Cin ca oO DIAMONDS, WATCHES AND WONDERFUL White Sapphires per carat; Canary $2 Imported mounted, porter), ee JEWELRY Selentifie Di rival finest | Yellow and } exclusively loo wholesale only Writ 152 Dewitt, Buffa! FOR THE HOME MAKE a Kiddy Kabinet; inte ful, ornamental Pattern, instr Coin Bogrens Kiddy Kabine Ave., New York City. HOME Mechanics- A new chanies Handbook containing that will be of value to anyor home 96 pages—203 illustr cents Popular Mechanics Pre Mechanics es Building, © Room 80 LOOMS—Only $9.90—Big money ing rugs, carpets, portieres, et: t from rags and waste material. We rushed with orders. Send for free | it tells all about the weaving busine wonderful $9.90 and other loom Loom Works, 480 Factory St., Boony CONCRETE Handbook, for the We have just published a book de ways of using concrete in the hor on the farm, with full directior these things yourself with ordinar illustrations It is writte: understand it.”’ Price 50 cent Popular Mechanics Book Dept tario St.. Chicago PHONOGRAPHS AND RECORDS A PREPARATION for tre graph Records Put the into service Where there's there’s a sale. 50 cts (100) records. Parties ing for particulars when ordering Mfg. Co., Box 217, Salina 50,000 STANDARD 7 %x« Phonograph Records, Play i While they last, 500—1l5c; 100 order 25 Records—all different today. Andrew Beck, Nashville BUILD your own Phonograp! everything. Write for catalog ar print offer. American Phonograp! North Crawford, Chicago BUILD your own phonograpt supply you with motors, tone ar accessories at wholesale prices. Wr alogue AX. Pleasing Sound Pt 204 East 113th St., New York, N BUILD phonoparts. motors of tonearms, terials, Your Phonograp!t Quality Serenado other types Electri reproducers, amplifier accessories Free bil building instructions Big sa derful results. Prompt deliver mailed for ten cents Hoosier M ing & Supply Co., 313 Bal Indianapolis, Ind MUSIC AND MUSICAL “BELLE ISLE” (Little Q \ Islands.) Beautiful fox-trot V coples or dance orchestratior 2 Special quantity prices Roma Pul ahing Co., 3687-9 Towr Mic INSTRUMENTS Piano Cl Piano P Harmony ; Effects, Ear Snappy Bass Styles, Ea Write for Free B at home Bill,” 211 Ossington Ave., Tor WRITE Songs. Big money tion Write for informatior Pub. Co., 201 N. Hoyne Ave ‘MU sIc ( ‘omposed”’ to words (formerly of Sousa’s Band 0 “VIOLINS, Deep, Mellow credit. Easy terms for won jerf il Get details today. Gustav F. Her Colo Gaylord St., Denver, I PAY Cash for Saxophone chestra instruments Ship for state your price. I prepay_return my offer not acceptable. River ! State Bank my references. Chicas strument Exchange, Dept. 505, born St., ¢ ‘hicago ~ | WANT Song Poems. Casper Na Bryn Mawr, Chicago, I NEGRO Piano Chords,

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POPULAR PATENT ATTORNEYS Prompt Service. Per- ficient service. Highest rate fees Send sketch or earch and advice. George P. of Patent Law, 54-F Loan Washington, D. ©. __ rges, Patents, Trade- Marks; patentability opinion. Guide ilding, Washington, Db Trade Marks Reg- rensive experienced, protection and de- ! Preliminary ad- hed without charge Book- ion and form for disclosing request Richard B. Owen, Washington, D. C., oF rth Bldg., New_York. s spent annually for ideas! wanted! Patent yours and day for free beoks—tell how irself, how to invent, ideas » help you sell, ete. American 00 Kresge Bldg., Wash-

Personal attention and in- en to patent matters for reason- Albert Robinson, MeLachien ton, D.. C Formerly an on of Petes 8 88 patent litigation, trademarks, ibook of instructions “‘How tions’’ free on request R. Attorney, formerly of the Examining Corps, Room Washington, D. C IEbD 1864 Milo B. Stevens Registered Attorneys (No. e Marks—-Copyrights. Full in- n request Moderate fees. ister Building, Washington; ng, Cleveland; Monadnook Ouray Bldg., Wash- Attorney; Mechanical, Blue Book gives MILLER, Patent pert, Free aod ‘Trade-marks obtained. Write for our new book on ablished in 1889. D. Swift & St.. Washington, D. C. NTORS—Send for form ‘‘Evidence of to be signed and witnessed. hedule, information free. Lan- Allwine, 221 Ouray Bldg., Wash- ‘\TENTOME is free. A liberal pateats. Anderson & Son, tab. 1865. 635 F St., N. W., assist you in_obtain- tent rights Personal assured George Van irrister Bldg., Washington, Copyrights and for advice and in- costs, ete. Hand istrations of 100 Mechanical t free on request Albert E. Patent Lawyer and_ Solicitor, *Bidg., Washington, D. C NTORS—Patent your idea Send r tel for opinion on patentability iow to proceed free Reason- Frank B. Hoffman, Patent on Bank Building, Washington, ‘rade- Marks, Write roceed, -M. P. Laughlin — Engineer- West 42d St., New York \G In—If you have a practical use- to sell, write us today, stating ted American Patents Corpor- ter Building, Washington, D. C A\TENTED Ideas Can Be Sold I w and help you make the sale. ilars (Copyrighted 1923). Write 806 Jenifer Building, Wash- 0- op ERATIVE Plan for handling p patent Write for ow te feguard Patent Pending.’ Lawyer 0 dC INVENTORS—Write for our Guide Book, Ra to Get Your Patent’? and Evidence of ‘vention Blank. Send model or sketch of rour invention for our prompt examination ry instructions free. Randolph & Co., Dept. 430 Washington, | Dd« HORACE L WOODWARD — Efficient, raceent ic 18 service Send sketch for pre- liminary advice Established 1906. 704 ‘nth, Washington, D. C. HERRER? JENNER, mee Menies al expert, Cc free book inventions and sell under * Ralph Burch, Patent Jenifer Building, Washington, telling

patent attorney and Street, Washing- I report “ patent obtainable and Send for cireuiar, ton ‘tact cost.

MECHANICS ADVERTISING SECiivuwl INVENTORS should write us for our book, How to Obtain a Patent,’’ which clearly sets forth what may be patented and the necessary steps to protect an in- vention; it describes the procedure in patent office and tells about assignments, license and trade marks, and gives many useful facts about patents which every in- ventor should know; many persons well versed in patent matters have pronounced the book the best of its kind they have ever read; it is written so you can under- stand it; copy free upon request Talbert & Talbert, Patent Lawyers, 481 McGill Bldg., Washington, D. C PATENT SENSE—‘‘The book the inventor keeps.”” Free. See Sinan _ad, page 154 PATENTS—W rite for our Guide Books and “Record of Invention Blank’’ before disclos- ing inventions. Send model or sketch of your invention for Examination and Instructions No charge for the above information See advertisement on pages 152 and 153. Victor 5 Evans & Co., 934 Ninth, Washington, » Personal service A Senner, Olympia, Wash COMMERCIALIZE to My Cooperative Plan before pate Bookiet Free. Ralph Burch, Patent Lawy Jenifer Building, Washington, D. C a. ATENTS—Send for Booklet valuable information for inventors Our charge for search of Patent Office records $5.00 Prompt service, twenty years’ ex- perience Talbert & Talbert, 500 McGill Building, Washington, D. C CASHING In—If you useful invention to sell, stating whether patented Corporation, C LACEY Patent INVENTORS—Write for our Guide and “‘Record of Invention Blank’’ before closing inventions Send model or sketcl your invention for our free examinati instructions. See advertisement or and 153. Victor J. Evans & ¢ Washington, D. C PATENTS Procured Send model today for examination, pre and advice No charge for prelir vice. Write for free Booklet on which to disclose y references Promptne A. O'Brien, Registered ater ai Security Bank Building. Direct! street from Patent Office, Washingt See pages 150 and 151 INVENTORS We to practical use; models; after your ideas «a rd have write American Sarrister Building, Wash gton, Sense See page 154 page develop make necessary expert engineering counsel; Patent; also help market vention Investigate (No att brokers. ) Caston-Guay Engineers, ington, D._C._ PATENTS Procured; istered f comprehensive, experienc: prompt service for the protection and velopment of your ideas Preliminary vice gladly furnished without charge. Bool let of information and form for disch idea free on request Richard B. Ower Owen Bidg., Washington, D. C., or 22 Woolworth Bide. New York HAVE You an Invention? If so, write for our free book, ‘‘How to Get Your Patent.’ tells our terms and methods Send or sketch for our free examination and structions Randolph & Co., Dept Washington, D. C UNPATENTED Ideas Can Be Sold tell you how and help you make the Free particulars (Copyrighted 1923) W. T. Greene, 807 Jenifer Building, ington, D. © I SELL Patents. Established in 1900. My Service ts employed by inventors who are also. Bankers. Lawyers, Patent Attorneys, Mechanics Men in all walks of life—and Corporations with patents to sell Why not you? Charles A. Scott, 773PM Garson Avenue, Rochester, N. ¥. “Trade Marks | sale Write Wash-

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46 POPULAR MECHANICS ADVERTISING MODEL Making and experimental work Modern shop; expert workmen Manufac- turing Lamson Electrical & Mfg. Co., 625 W. Jackson, Chicago TO sell your Patent, Write me; enced handling, immediate action Arthur 8S. Billings, Portland, Ore as GET your own patents Application blanks, complete instructions $1 Cutting Sons, Campbell, Cal PATENT Applic experi- Address Suite 401 Dekum Bldg., ation Blanks free to in- ventors. Patent News-D, Washington, D. C. WE Develop your ideas into comm shape for presentation to purchasers, making working models, drawings, experiments or tests Courtesy, efficiency, secrecy and ample equipment; 30 years’ experience Ducorron- Rich Engineering Co 504 Pacific Mutual Bidg., Los Angeles, Calif. PATENTS FOR SALE FOR Sale the most popular ercial Patent—Improvement on one of selling articles Market for twenty millions Very cheaply manufac- tured. Luther P. Creasy, Catawissa, Pa FOR Sale or Royalty Broom. Patents per berger, % Mr. M posit & Trust Co., land County, Pa a PATENT for Sale on it Will not loosen, but desired Withstood in Stevens Invention—Im iding Write B. Mols- Wattson, Jr., Safe De- Greensburg, Westmore- proved iproved Lock Nut readily removed when load of over 22,990 Ibs Institute test Solt fractured without starting nut Outright or Royalty H. H. Goodwin, 30 Church St New York PATENT on saundry Manu facturing cost imited demand. Sell outright Alex Wai lich h, Wilton, Chi- cago FOR bile J. Kumagawa, wood, Calif ~ FOR Sale—U. S. Patent No. 1 on a Beet Harvester Digs Will sell for SALE—Patent on fountain washing device, including mop or swab 1644 N. Hoover St., Holly- automo- 399 876, tops and loads cash or on royalty This is a very valuable invention For further partic- ulars, address W. Z. Pulliam, 903 65th .o Angeles, Calif TOMATIC Window Ventilator u. 8 No. 1,018,585; Great Britain Patent I 27,805; Canada No. 132, 002 Also Root Puller, U. S. Patent No. 1,364,807 D. L Reitz, Box_ 362, Cairnbrook, Pa FAST Catcher Fly Trap, No. 1,487,091 Fred Day, Alcester, So. Dak , FOR Sale—Outright -~i 7 lug 1,384,914; Can. 228,8 % claims, a complete i Inves tigate Then make me offer Wim P. Orsinger, 2037 Birchwood Ave.. Chicago, Ill FOR Sale—My Foreign Patents on pocket sewing device Great money maker Cc Myers, 6324 Woodlawn Ave., Chicago, IIL, U. 8. A NS PARTNER wanted to help in manufacture of new kind of brass Process patented. Will sell outright at proper price. Otto Najacht, 1602 N. Wells St Chicago PATENT for Sale Smoking Cabinet Smith, 405 W FOR Sale ing Machine patents Sanitary Cuspidors and Outright or Royalty. Wm State, Olean. N. Y Patent on a Wall Paper Hang- Something new; fits any roll -f paper. Can easily be operated by anyone Made very simple Weighs three pounds Will sell for cash or royalty ? aes oe tox 221, Jackson, Mich FOR Sale—Double action hand-saw set- ting device, patent No. 1437289, Stanley Borusiewski Patentee, 1009 Polk Street, Portland, Ore U. 8S. PATENT for improved pipe wrench, reasonable; for patent copy, and further in- formation, address, William H. Wiegert, 93 Emerick St.. Kingston, N.Y FOR Sale, a few door and window Brazil Ave., San WANTED—Royalty on revolving hanger, attachable to floor or counter; bunch lifted from crate by windlass and hangs over counter. Fred Minder, Pawnee, Ill A METAL collapsible combination double bed, table and benches for sale; can be folded so ) to fit on running board of auto- mobile. Vill also sell patent rights on a A davenport, couch, swing and erib. V. Hrachovina, 436 Superior St., St Paul, Minn. PATENT Pending, Improved machine for light manufacturing articulars Baum’s Metal Kansas City, Mo 4 FOUNTAIN Tooth Brush. No competition. Partnership or royalty. G. Bjorkholtz, 6417 Greenview Ave., Chicago, IIL hardware inventions of Fred Bottemiller, 315 Francisco, Calif banana tapping Write for Specialties, KITCHEN Memoranda sales of over a year Good Housekeeping Wonderful advertising Bonnell, 102 8S PATENT on Cars Robert Kearney, Neb SEVERAL for Sale burn, Ind FOR Sale—Patent on Hard recently issued This is the hard grease cup yet produced An ited market. Will sell alty For full Grant, Proven success by Tested and approved by Cheaply manufactured possibilities Ww. W Harrison St., Bellevue, Pa Rotary Snow Plows for all Earl Haynes, 1917 Ave. C, Patents Beard, Au- “Good “Money “M iking Investigate. G. M Grease most Cup practical unlim- outright or on roy- particulars address Fred C Sangerville, Maine DEVICE of wood and cork pre ing of top ensilage in silos F. Bright, 208 W. 139th St., City NON-Spill Diner Coffee Cup, U. 8 Sale or The closed cup eli: soile i . Bertha E. Hodgkin, ville ‘ FOLDABLE mosquitoes and way Ave., Darby. Pa YOU have a worth-while you Why vents spoil- Investigate New York Patent; iinates Russell- screened roc’sing chair against flies Stransky, 200 Green- haven't million patent, don’t you tell our two readers about it? Most of them are spe- cially interested in patents and new inven- tions Ask me to tell you how other in ventors successfully sold their patents. Geo. F Baker, Manager, Classified Advertising, Popular Mechanics Magazine, Chicago, Ill PATENTS For Sale To sell, buy or obtain patents, write Patent News-P, Wash- ington, D. C SURVEYING INSTRUMENTS NEW and used rect from factory. or money refunded. St. Louis MODELS AND SPECIAL machine makers, inventors surveying instruments di- Satisfaction guaranteed Wissler, 619 Broadway, MODEL SUPPLIES builders, toot and die models, production work of all kinds. Dept. L, Quality Hardware & Machine Co., E. Ravenswood and Thorndale Avenues, Chicago, Ill MODEL steam engine 5 x 53°77 $8.50 Finished parts for same, $7.25 Other en- gines, boilers, blowlamps Catalog for 10¢ stamp Model Machine Shop Co., 417 East 7 St New York City PATENTS Procured. Send sketch or model today for examination, prompt report and ad- vice No charge for preliminary advice Write for free Booklet and blank form on which to disclose your idea Highest refer- ences Promptness assured Clarence A O’Brien, Registered Patent Lawyer, 583 Security Bank Building. Directly across the street from Patent Office, Washington, D. C See pages 150 and 151 INVENTORS—Write for our Guide Books and ‘‘Record of Invention Blank.’’ Send model or sketch of invention for our free ex- amination and instructions See advertise- ment on pages 152 and 15 Victor J. Evans & Co., 165 Ninth, Washingt m, D. C MODELS and Patterns made manufacturing Address H. W lason City. Towa THE Modelmaker. For those interested in making working models Send 10 cents Address P. M. 120 Liberty Street, New York DIES, Tools and General Manufacturing Models and Manufacturing of new inven- tions our specialty. Logan Machine Co. S. Clinton St., Chicago, I! MODEL Making and experimental work; Modern Shop, expert workmen Manufac- turing. Lamson Electrical and Mfg. Co., W Jackson, Chicago MANUFACTURING established manufacturer of accessories which are daily sold by prac- tically all wholesale and retail accessory houses will consider manufacturing and dis- tributing new automobile products, capable of equally wide sale through same chan- nels. Patented articles preferred Address Auto Accessory Manufacturer, Room 2104, 310 S. Michigan Ave., Chicago, Ill METAL-CRAFT !—Eventually Metal-Craft Competent Engineers, Designers, and Pro- ducing Organization await your commands on dies, stamping, die-casting, deep pressing. screw-machine and wire products Plating, Enameling, Burnishing, Wrapping and Pack- ing to your specifications. Very reasonable. Large, completely equipped plant “Your problem is our challenge to serve.’” Metal- Craft Manufacturing Company, Box 259-W, Chicago, Light Hathorn, LONG auto SECTION ELECTRIC pumps for cir fountains, aquariums, adyerti et Walter 1. Haanel & Cc wood Ave Chicago PATENTED Articles, Models. fh Machine Construction: Dies Mad Metal Specialties, Kansas (Cit LET us manufacture it for low prices and can furnish a would be proud of. Ideas worked plified. Modeis made. Metal drawings or sample. Simplex To socket, R. I. BOLTS, nuts, rivets. O Trask, Bayonne, N. J OUR factory will make your ufacture your articles as well tools, dies and fixtures. Standar Specialty Co., 817 W Washing Chicago, Ill wins goods made to Co., 524 N order Western Ave., Chi EXPERIMENTS developed and manufacturing machine desig timates and information prompt Address Schroer Bros. Machine East 25th Street, Kansas City PATTERNS, wood and met tools and dies, Brass, bronze, iron castings. Screw machine w tion work of all kinds. Write chine & Pattern Co., Terre Haut SCREWS, nuts, screw mact all metals. Autoscrew Work Broadway, New York City IRON, Brass, Aluminum Ca els, Patterns, Light Manufactur Brothers Co., North Chicago, Ii MACHINERY, TOOLS AND SUPPLIES ONE chine, 16” x 36 Kempsmith Unive complete with divi ” Pratt and Wh 16” x 10” Lodge Engine $190 Power hack saw, particulars Cincinnati Co., 218 Pearl Street, Cinci FOR Sale. Rebuilt No. 60 Grinder Lucas & Son. Brid SPECIAL. Drills Drill i broken faucet screws. $1.50 P Specialty Co., N. ¥ 34la Monroe GANDY Thresher and Tract endiess canvas thresher belts ally known. Unusually low Iron Pulleys, Belting, et George Wettschurack, Lafayet CONCRETE Building Block Molds Catalogue free Cor Co., 303 South Third St., St STEPTOE’S medium priced line Milling Machines, Lathes and D will reduce your manufacturing lished since 1845. Catalog The John Steptoe Company, Si tion, Cincinnati, Ohio SPECIAL labor saving machi: and built. Punches and Dies and tools furnished for manufact ‘ Simplex Tool Company, Woon R I ENGINES, MOTORS AND DYNAMOS AUTO Engines for Power I you how to fix yours up to sell or dee-Smith Governor Co Sprir z MOTORS ‘ex (3 - acturers % hp. $8.5 % hp. $52.50 8-volt cen Generators $8 Lighting Plants, Generators chinery Write for Catalog. M ties Co., Crafton, Penna GENERATOR 32 Volt, 300 500 Watt $22.50 1,000 Watt Horse Alternating Motor co olt 5 ampere Generator $50.6) gains in other Motors, Generat Generators Queen City Electr 1736 West Grand Avenue rica _, MOTORS. % HH. P at 0. D. Miller, 302 Mille rB on Pa BLUR Generat: ors, brand new maximum output 22 amperes at - Government paid $45.00 eact $10.00 Jeneral Sales Compar Michigan Avenue, Chicago, Ill FOR MECHANICS 1,000,000 INDUSTRIAL Facts tions, Receipts, Processes and Tra ade for every business are contained ir page book ‘‘Moores Universal As Complete Mechanic,’’ 500 Engravi: Price $2 postpaid. Popular Mecha Dept., 206 E. Ontario St., Chicas Book

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POPULAR ite for our Guide Books vention Blank’’ before dis- Send model or sketch of for examination and instruc- for the above information. t on pages 152 and 53. & Co., 184 Ninth, Washing- k—The experiences of 106 in handling special jobs k that is selling like hot cents Popular Mechanics Popular Mechanics Build- FOR THE SHOP Saws, Knives, Razors, Ete., ump by Kent's Simple Etch: articulars Ed. Kent, 151 San Francisco, Calif. You will seldom if ever ob if you keep on hand for e a 15-volume set of Popular Notes. At the price of 50 any one of the several thou- labor-saving kinks may save any times over Any one of ay be purchased separately at ¢ Popular Mechanics Book Ontario St., Chicago Shop Notes Book for 1924, 50 articles that have appeared tes section of Popular Me- the past year. Bigger and 242 pp.. 455 ills, 50 i Popular Mechanics Book Ontario St., Chicago. ELECTRICAL x s about your small armature and ling and commutators. Elec- tor Service Corporation, 200 W. Chicago, TIL BLACKSMITHS SENSATION of the season; the new Wrenchless Universal Bender; bends , Angles, ete. Bends 1% in cold. Also rolls perfect Auto- pring Eyes. Machine can be in- t for any kind or size of work with- of a wrench. Simple, Powerful, Send for circular. Universal nder Co., Inc., Winona, Minn. Rep- es Wanted KSMITHS, Listen! Make more ing hard jobs easy with Toy’s Mod- of Master Machine Blacksmith- and Solid Welding, Tool Dress- pering to a standard with colored harts. All for One Dollar. Sam- ree. W. M. Toy, Sidney, Ohio. Bessfeld Bye bx FOR SALE—MISCELLANEOUS ER SHELL Pecans, hand : Music rubber stamps, burning brands, egg daters, graded, number- stencil letters, seals, rubber type W. Karstaedt, Dayton, Ohio. Rebuilt fifteen-dollar ght dollars while available. These re taken in trade on larger Factory guaranteed Send for nee Mfg. Co., 10312 Berea Rd., France Large Tube Dental for Shampoo Pearls 2 Seventh Street, Cream with 0c postpaid Milwaukee, )DRESSOGRAPHS Letter itigraphs, Envelope Sealers, har f price. Guaranteed Wells, Chicago. Buy! Folders, Duplicators, Pruitt Co., ET’S Swap! Sell! Whath’ya got? ald ya want? Four Months dime. Inter- ational-Opportunity, Brookings, S. Dak. RUY—Exchange—Sell! Many of Teaders have for sale or exchange the are looking for—and lots of looking for the very items you turn into cash. Get together! Let lion readers know your wishes— you! Send your ad today to Baker, Manager Classified Adver- lar Mechanics Magazine, Chicago. our ON atiines WANTED—MISCELLANEOUS ld eee jewelry, teeth, gold, Prompt payment ntile Co., 10117 Ohio silver. Mail to Baltic Rd, MECHANICS ADVERTISING MAIL us your discarded Jewelry, Gold, Crowns and Bridges, Watches, Dia d SECTION 47 PERSONAL Silver, Platinum, and old False Teeth. Money promptly mailed. Goods returned if offer re- fused. United States Smelting Works, (The Old Reliable), Dept. 71, Chicago. WANTED: Light Drill Presses—Model High-Speed Gasoline and Steam Motors. Best Cash Prices Paid Motor Specialties Co., Crafton, Penna. Machinery—Lathes REAL ESTATE, FARM AND ORCHARD LANDS FLORIDA Orange Grove for $1650 An association of orange growers and nursery- men, not land men, but residents wishing to rapidly develop this beautiful section, will sell you ten acres of fine, young orange or grape- fruit grove for only ‘sis: 50, or $165 per acre, about ~x¥ fourth cost elsewhere. Terms, $750 cash and $10 a month. Fine trees and fine land in Florida’s great highland lake region No swamps, palmetto or malaria. Save all agent’s or middiemen’s profits; ers. No time for curiosity seekers or tourists, but if you want a grove, write for free book of actual facts and photos. Lake County Land Owners’ Association, 93 Nursery Avenue, Fruitland Park, Fla. with Cow, in up le sinents, good 7- 110 Acres furniture, $500 CASH Secures Crops, Horse, poultry, tools, ete.; near lake and villag room house, barn, ete. $900 takes all, only $500 needed. Details page 30 Bargain Cat- alog, best sections United States. Copy free Strout Farm Agency, 150P Nassau St., York City. 320-ACRE Hills sheep, stock, cattle, Alfalfa bottoms; for 100 tons Hay under roo springs, fine body saw timber, game Lehner, Sundance, Wyo. ATTENTION—“‘Get acquainted.’ Cash for your property, Farm, Hotel or Retail Store, no matter where located; confidential service Hayes’ Business Agency, Cincinnati, Ohio FOR Sale—Three full sections Me- Kenzie County and two sections in County, North Dakota. Each section con- tains land suitable for crops, balance for cattle. Each section has valuable deposits of lignite which some day will alone be worth many times the present value of the land. This part of the state is developing very rapidly with good schools within easy access. As owner cannot use this self, will sell ome or more sections at a price which almost anyone can afford to pay. Address W., care Popular Mechanics 200 East Ontario | 'St., Chicago 20 AC RES or more of Michigan; $20 to $30 per acre; 3.000 pop. $10 down, bal. long page book free Swigart Land Co., First Nat'l Bank Bldg., Chicago Black dairy, room Running Chas Ranch, in land near time P-12 59 our best SELL your property quickly for cash matter where located. Don’t pay mission Particulars free Real Salesmen Co., Desk B., Lincoln, Neb big com- $5.00 DOWN, unimproved $5.00 monthly; poultry, fruit, stock, land; $100; Ozarks Fishing, trapping. Alfred Zimmerman Fifth, Kansas City, Kan 10 wood- hunting, 1800 N DOGS AND PETS BEAUTIFUL White Collie Puppies greed stock; satisfaction guaranteed from $20 to $40 Runners Rest Kennel, Flora, Ill Pedi- Prices Collie BEAUTIFUL Bulldogs, registered bull 501 Rockwood, Dallas, pups cheap Texas SILVERBLACK Foxes payments. Booklet dime. macher, Lockland, $350.00 Arthur Time Schu- 0 POULTRY PROFITABLE Poultry. $5,000 home in 26 months. Spencer, R. 1, CHICKS Leading varieties illustrated chick book free. Comfort Windsor, Mo 32 hens paid for Booklet for stamp Santa Cruz, Calif Our Hatcher YOU should turn hustlers and get the tion, address Twe Thames hens into exnlana- Service, lazy, profitless eges For free Pentland Snecialty Avenue, Norwalk, ~ Conn buy from own- | big | New | Billings | land him- | in | town | no | Estate | acres | UNUSU words, AL consisting Special Horoscope, Horoscope—-Six pages, 2 of extensive four-page Astro-Analysis, and two page valuable guide giving daily and monthly advice covering entire year Send dix j birthdate Money returned if dissati fied Prof. Bolles, Box 125, Cranford, N. J KNOW THYSELF! W: Horoscope—your talents, enemies, business Send specimen of pe ee Studio, Box 2 -D, Boston, Mass. LUCKY Charms, Lodestones, Occult Books Catalogue 5 cents Station i, New York ARE You Old at Forty? ment on page 146 of this Thermal Company, 21 enville, Ohix LUCKY Days forecast Box 1646, YOUR Horoscope Changes, Friends, Enemies and ten cents (stamps) reading Zanya, York City TOBACCO Kills ily Cigarettes, conquered or no satisfactory Stops treatment on trial. Hastings. Neb TOBACCO pay $1.00 Superba FREE that has aT | nderful Three Page character frie birth date, year and 10« Gargilis Secrets, Box 55-P, _ See our advertise- issue. The Electro 34 Main Street, Steub- Two Birthdate Denver years 50¢ scientifical! Satisfaction Business, Character Send birth date for remarkable t¢ 200-C. W., 70th St., New manly Vigor. Quit chewing, smoking, snuff charge Small sum if craving; harmless Full Perkins Co., 34-A, fas or Snuff if cured Ce.. TP, Information of a brought happiness health to thousands No charge; no ob! gation Enclose stamp for reply ‘ 0 Wood & Co., Colmado Springs, Col FREE—Stop using tobacco We will free information how to conquer habit and permanently Results guaranteed Tot League, Box K, Omaha, Neb Habit Remedy Baltimore, cured or ne sent on trial Md scientific through perfect nature give easily Anti MISCELLANEOUS FORMS to cast Marines, Trappers, Send for Catalogue 72nd St Brooklyn LOCKSMITHS chart for -eutting Globe System, 278 N Tin Soldiers, Indian Animals 142. kinds Henry Schiercke, 1034 N. ¥ Send $1.00 for valuable tumbler sodiedk ke Vashington St Newark of dime Orland, Making Cuts Process Fisher, UNIQUE Catalog Clarence Edwards Cc MAKE Photo cents ton bargains free Ohio Money By Engraving Horton and Ii. GET posted flies, insect ment, page 50 TATTOOS Removed in one week sure and convenient Mail Mar for plete instructions W. E. Peck, 57 S« nock, Denver, Colo REDDY rhe kit, complete with make or repair 101 pouches, tool cases ete., from old autor prepaid Put Rubber Co 11%¢ Sem! lified Box Good prices paid for See Sinclair display advert Wonder’’—Rubber repair illustrated book—how t useful, attractive article folding water bucket nobile inner tut $1.00 Reddy to work Reddy Mary Akron, Ohi ARE You Old at Forty? See our advertive ment on page 146 of this issue The Elect Thermal Company, 2134 Main Street, Steul enville, Ohio MONEY in Minerals erals have market value. List free Minerals tested Mineralogist, Joplin, Mo COIN Operated Machines bought, changed, repaired Barr Novelty Shamokin, Pa ARTIFICIAL Denver Optic, es Many common mi sold, e Compan “Booklet Denver, Eyes, $3. 559 Barclay, HOMEOPATHIC tions sent postpaid world Manual Bros. Co. 111 } Wabash Ave., Ii Established 1855 UTS anvhedy process stamy M ROCKS and of varteties 157 Wells free Cok and Biochemic prepara the ” Chicag: Simple, chean particulars 2e Ind Minerals for sale—hundreds price List Free. Peter Zodac, St.. Peekskill, N. can make Specimens, Dav. Windfall

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POPULAR MECHANICS ADVERTIS"NG SECTION —| ———_——— an —- a re ae Oh Bit SRA ¥20 4 SP eetmesre BECOME A RAILWAY MAIL CLERK — No strikes. No lockouts. When everybody else is worrying about his job or looking for work, the U a Service Employee is earning good, steady pay in a pleasant occupation of his own selection. EAR S. Civil Patterson to $2300. Let me train you to pass the U. S. Civil Service Examination with high rating o¥ vy oy Fog tem - get a position quickest at $1600 to $2300 a year as a Railway Mail Clerk or in Cus oma pest. 0S, er, WT. — Internal Revenue, Departmental, Immigration, Postmaster, Post Office and Rural at ches, } Fay LX. J pr yy — I have trained thousands to successfully pass the examination. Money refunded if un 1eceg. | oosamse Gaiienn, ful in securing aposition. Examinations Coming. Write today. Mail coupon for stalog | aw ~ ~ = PATTERSON CIVIL SERVICE SCHOOL eee eee eee ere er eee ee Dept. 86 ROCHESTER, N, Y. H | Trained Men Make Big Money in the AutoBusiness | Six weeks at the Cleveland Auto School will give you a training that is second to none. More than 7,000 of our graduates are now earning big wages in all branches of the business Many own their own garages and are prosperous and respected members of their commu- nities. You can do the same. Classes starting now. Write now for full information THE CLEVELAND AUTO SCHOOL, 1814 East 24th Street, CLEVELAND, OHIO _ Make Money Drawing Cartoons 2 en = 3 it’s Easy To Learn When Shown In The Right Way ‘ q ome of cleverest cartoonists and comic artists in America today learned to draw during their spare time by following CARTOONIST EVANS’ SIMPLE AND EASY METHOD. This sehoo! e mended by foremost cartoonists because they know the students are handled right. If you to draw, send a sample of your work, either an original or a copy, and we will send you a portfolie of s and full details. The course is NOT EXPENSIVE. + 821 Le Buildi : The W. L. Evans School of Cartooning ci. 2.o0es Re eT ET LLA RB ew ArcoMtrAne THOUS toes E> | Perfect Health Absolutely WRITE NOW, FREE through a Natural Law ENICAR TRAOQE eehooes Address ALOIS P. SWOBODA d eacine. wm | 1252 Berkeley Bldg. NEW YORK# Are You Reaching for the Cruth? Iwill tell Under which Zodiac Sign were you born? What are your opportunities in life, your future pros F pects, happiness in marriage, friends, enemies, success in all undertakings and many other vital questions as indicated by ASTROLOGY, the most ancient and interesting science of history ? Were you born under a lucky star? I will tell you free, the most interesting astrological interpretation of the Zodiac Sign you were born under. Simply send me the exact”date of your birth in your own hand- writing. To cover cost of this notice and postage, enclose twelve ; cents in any form and your exact name and address. our j astrological interpretation will be written in plain language and sent 34 to you securely sealed and postpaid. A great surprise awaits you: . Do not fail to send Birthdate and to enclose 12c. $¢T) ad Print name and address to avoid delay in mailing. birth rabshas, Write now — TODAY—to the ' a \i aN ’ lan f : = " . N York AV AV AW AWAY ASTA STUDIO, 309 Fifth Ave., Dept. 138, New

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POPULAR MECHANICS ADVERTISING SECTION _ Big Pay for men trained by =| [RAHE SHop METHOD sines [i ~=Auto Mechanics Earn Big Money! ommu- & nation trained by the Rahe Shop Methed make big pay in steady j William Sharp, of Albion, Pa., says ‘Since learning a trade OHIO ‘the Rahe Auto School, I am making $3,000 a year and getting ng fir Mr. Sharp’s experience is like that of thousands of er men who have received the thorough, practical Rahe training. ho knew nothing about automobiles are quickly trained in | Rahe Trained Men Are Always In Demand y day there are calls from garages, automobile factories, etc., men trained in Rahe shops. This demand means that we train more men than ever before---the automobile industry u ive skilled mechanics. We teach you in a few weeks to perate, adjust and repair all makes of motors, and to repair and build batteries. You learn quickly and thoroughly under personal u sion of ex pert instructors The Rahe Course Is Complete e “Rahe Shop Method" you are trained in every detail of bile and electrical mechanics. After you complete our e you will be out of the small pay class---you can then do e work that pays big money We Pay Your Railroad Fare y your railroad fare to either our Pittsburgh or Kansas City ind provide room and board. Mail the coupon today, and You learn by actual work with send you our Special Offer for this month only. tools and motors The Automobile Industry MAIL THIS COUPON NOW Needs Trained Men HENRY J. RAHE, President, Rahe Auto & Electrical School, 916 Forbes Street, Pittsburgh, Pa P.M Ju RAHE fizccricar SCHOOL] wr rion oy nee we send me your booklet and full particulars, explaining your course in automobile and 916 Forbes Street 1ith & Locust Sts., electrical mechanics, and your sate offer Pittsburgh,Pa. Kansas City,Mo. | + J _ ; a You must learn so that you can earn’— ni tomy hicks ve

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POPULAR MECHANICS ADVERTISING SECTION a BUILDING TRADE S’ | HA ‘NDBOOK | 409 pages 263 illustrations A reference book for every man con- nected with the building trades. $ mulze, Mensuration, Geometric Drawing, Structural De- sign, Materials of Masonry Con- struction (stone, brick, terra cotta, lime, cements, sand, mortar, con- crete), Carpentry and Joinery, Roof- Thousands sold. Complete—prac- tical—thorough. Easy to under- stand. Pocket size. Just fill out the coupon below— slip it into an envelope with a dollar bill and mail, and this 409-page TRADES’ Contents :— Blue Prints, Weights and Measures, For- ing, Steel Square, Plumbing, Heat- ing, Estimating, Architectural De- sign, etc. LC. &. Building Trades’ Handbook w a aaa speeding to you by return mai You run no risk Money back if desired ee ee ee ee ae INTERNATIONAL CORRESPONDENCESCHOOLS |! Box 5607-D, Scranton, Penna. : 1 I enclose One Dollar. Please send me—post- 1 paid—the 409-page I. C. S. Building Trades’ l Handbook. It is understood that if I am not entirely satisfied I may return this book with- | in five days and you will refund my money. ! i 1 1 Address..... McNeil of Isham Jones Orchestra Will Show You How The demand for competent. players at salaries fror $ a week is still far from filled because leaders demand banjois play right. Faking, ear-playing, ukulele tuning and va make-shift methods do not fit in with the really good jobs Charles McNeil of the famous ISHAM JONES ORCHESTRA has created a chord system that will teach you all you need t order to hold a top-notch position Formerly sold as a correspondence course for $25.0 Pr v, in %6-page book form, $3.00. Send money order (P. O. or Express The 480 chord inversions, all explained, are worth more than the price of the book. Write today! McNEIL CHORD SYSTEM, 2iSjit!4,Arp's 3 LEARN: Jewel ry Making Easy To Learn a delightful accomplishment a money-making prof $10 for 30 lesson course complete two pieces of jews in first lesson. article in course in¢ FREE. Send for illustrated bool N. Y. School of Jewelry Making, ; >? 110E. 23rd St., New York Tools lor ¢ WHY NOT ; spend Spring, Summer and Fall gathering butterflies, insects? I buy hundreds of kinds for collections. Some worth$1 to $7 each. Simple outdoor work with my instructions, pictures, price-list. Send 10c¢ (not stampe)for my Illustrated Prospectus before sending butterflies MR. SINCLAIR, Dealer in Insects, Dept. 6, OCEAN PARK, CALIF. Fibre-Lite Limbs Q==s AGENTS WANTED who use Artificial Leg. GOOD Fibre Semple WORMAN co. 252-P sn tense PIN AVE DESCRIBE STUMP TO MINNEAPOLIS. MINN. WRITE TODAY for rasooK Destiness FREE BOOK on and learn how Perfect Hearing is now being restore¢ condition of deafness or defective hearing. Our ‘ Lit less Phones for the Ears” require no medicine, Ler eff replace what is lac king or defective in the nat ea They are simple devices, which the wearer eas ears, where they are invisible. Soft, safe — | cor WILSON EAR DRUM CO., iasorporeted 1110 Inter-Southern Bldg. LOUISV ILL E, KY. DON’T WEAR - A TRUSS BE COMFORTABLE— Wear the Brooks Appliance, the modern scientific invention which fe rupture sufferers immediate re- f It has no. apenigns Springs of tic ind — draw - 4, thet broken No salves or plasters. Durable. Sent on trial’ to prove its perth. ware of imitations. Look for trade-mark bearing portrait and signature of C. E. Brooks which appears on every Appliance. .None other genuine. Full information and booklet sent free in plain, sealed envelope. BROOKS APPLIANCE CO., 215 State St., Marshall, Mich. eap. s Be- MR, C, E. BROOK

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SS Aes a Ss aS 8 3 = ated e. KY. POPULAR MECHANICS ADVERTISING SECTION ARGIFICIAL ARM FOR: nearly ten years a Carnes Artificial Arm has kept Mr. Pahhe Yazze of Lawrence, Kan., on the payroll as a draftsman and machinist at a good salary. Thousands of other mechanics, artisans, office workers, farmers and laborers owe their independence to this improved arm, Life-Like in Action and Appearance The Carnes Arm cannot be detected from the natural except by close inspection. Its user can dress himself, use knife, fork, pen, pencil and keys; pick up large or smal! objects, carry grips—in fact, do virtually every- thing that was possible before. He can bend the elbow of the Carnes Arm, bend and turn the wrist and open and close the fingers at will, even if the amputation is at the shoulder. 192. ee Book FREE. fi book of 198 re -i ng wh at can be done with this remarkable invention, will »to any person interested Send for it now. CARNES ARTIFICIAL LIMB CO., 208 Carnes Blidg., Kansas City, Mo. ACARI Imported Japanese Bamboo Self-filling — FOUNTAIN PEN Stylus point improves with use— * longer used, the smoother it writes. Capillary attraction controls the ink, no blotter necessary. Written guarant utisfaction guaranteed for one year. Retails $1.25. Sample 60c. 100,000 German marks free. Dozen pens, $8.00. TOKYO IMPORTERS, 608'2 Vine Street, CINCINNATI, OHIO TOBACCO OR SNUFF RUINING YOUR HEALTH a WASTING G YOUR MONEY cigars, ym gg scam 00 wi cate woth i Fe Used by over 400,000 people. H-2 Galtimore, Md. Try This on Your Hair [5 Days -_ -_ Write. Today Joa or ERE Trial Off Offer, i, & fF]; & |} Your hair need not thin out, nor need you become bald, for there is a way Soe 1 sstney the microbe that destroys the hair, This differ- 1ethod will stop thinning out of the hair, lifeless hair, remove dandruff, itching, darken gray hair and th hreatened reasing baldness, by pane agg | and prolonging I - f the hair for mén and women. your name now efore it is too late for the 15 days’ free trial offer. _ avi ESCO.,3932N.Robey St.,M.390, Chicago Gree cnc Enjoy for Men N E W and Women SCIENTIFIC Discovery NT FREE Trial in Your Home “Wonder Mist VIOLET RAY New Scientific Discovery Our FREE book describes this marvelous strange force, tells how “Wonder Mist,” improved Violet Ray, revitalizes every cell and works miracles overcoming pain and sickness. Physicians and plain folks explain how “Wonder Mist” has made them well, strong and happy. 64 pages, illustrated, actual photographs, scientific charts and diagrams. It’s FREE. QUICK RESULTS—No Medicine “Wonder Mist” works quickly; it’s scientific, goes after the cause. That’s why results are quick, permanent. Dr. Duncan, Kewanee, Ill., writes, ““Wonder Mist’’ is the finest thing I ever used . . . to relieve pain, treatments are so pleas- ant all my patients like it." Use it at home, Save Doctors’ bills. Brings natural magnetic beauty of health, nodieting, exercise or drugs. Partial list of aliments qqpecenteny treat- EARN CASH Men, women, without ex- ama perience earn liberal profits in spare time show ’*Won- ~ der Mist” to neighbors. Eye Discases Nervousness h Proves results and sells on Falling Hair Neuritis C sight. Get offer, whole- l Asthma } sale prices. SEND FOR FREE BOOK Expicins how 5 oiieste Telen discovered **Wonder Mist’’, how it works, why it heals. Tells how to conquer pain, disease and nervous trouble. GARTER FOR CROOKED LEGS PATENTED) Makes Trousers Hang Straight If Legs Bend In or Out Self-adjustable It holds Socks Up—Shirt Down Not a‘** Form ”"’ or ** Harness’"’ No Metal Springs Free Circular THE T. GART ER CO. Dept. 29 SOUTH BEND, INDIANA R is Marvelous Scientific Discovery. Shows charts of human body, expiains where pains start, how to banish them. Offered Free for a limited time only, to introduce “Wonder Mist.”’ Send for Free copy VI-REX CO., 211 S. Peoria St., Dept. 26, Chicago, Ili, es MAIL COUPON — SEND NO MONEY “8 VI-REX CO., 211 S. Peoria St., Dept. 26, a cleage. ut. Please send me without cost or « bligatio » your free 64-p. boo escribing your VI-REX *Wonder Mist’’ outfits, and details of your FREE Tria! Offer Name Address City

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POPULAR MECHANICS ADVERTISING SECTION } Can Train You ForA 1$3500 Hote! Job fern 2LOweeds The Hotel Business offers won- y derful opportunities to the trained } . cas y wu mi mi 2 r man or woman! Now fourth largest . industry in America. Hundreds of a citponiasion executive positions ade, $742.50 inone Many makemore ths ong Be ntley now standing open — waiting for aR. W. Carter, Mass. of Phil: adelphia writes, > Gods! the trained worker. You can Some § Sell TOUS easily qualify for one of these big- Some summer peer, M: de $215 Paying jobs—in your spare time today. at h N s ce peau. Oo previous experien Sells Itself 4 It only takes 15 minutes to demo nstr: I Guarantee to Teach You the wonderful Oliver Oil- -Gas Burner No in my 50-lesson home-study course on hotel work, all wonder agents are cleaning up fortu that the leading hotel experts know about the business —men making from $5,000 to $50,000 a year! My Big Summer Seller students are eagerly sought by the biggest and st = made $215 today." Jt offers ] ’ eae et hotels in the country. You won't have to look for a —¥.'W. Bentiay, Palin. ” me woe ey ay dD peng job. Big pay, fine living, free meals and apartment, Just turn off any fecal and eaed. Eeerehe fascinating work — these are only a few of the many ad- valve to cook VAs wile wants ene the minute a vantages of hotel work. F it. Over 200,000 already = . Cheap, clean, safe, odorless Send for FREE Book —any heat at turn of valve. 20 Years’ Experience in 20 es hat this as baking and cooking. fully complete course gives you urse prepar y e . Clifford Lanta, a hotel expert of national reputation. En- Exclusive Territory dorsed by managers of such hotels as Biltmore, Waldorf- Write quick to get details of our Exciusi Astoria, Copley-Plaza, Commodore, etc. Interesting tory and Free Sampie Case Offers. Many agent free book explains all. Send for it today. clean up from $1000 to $3000 every Summer LEWIS HOTEL TRAINING SCHOOLS quickly to be sure of getting a territory. quickly to be sure of getting a territory ounded FFORD Tews President ter in the first mail to Room «-” — ‘Washington, D. C cuven CE.-OAS SURNER co. 4 st and Largest Manufact The Mational institute for Hotel, Restaurant and Tea Room Training Oil-Gas Burners tn the VW 657 Oliver Bidg., St. LOUIS, MO. COMMERCIAL LETTERING PAYS More artists make a start in art through knowledge of lettering t! any other way. Send 25c stamps for lettering book and pens M " ’ the start now. Price list of drawing material and equiy Trade School Graduates Earn BART SUPPLIES, MINNEAPOLIS $75 to $200 a Week = ~~ WANTED— You, too, can become a trained expert. Cash in on the big pay jobs. We guarantee to teach in a few short weeks. You learn by our “‘on-the-job’’ methods, without books or rules, but with your head and tools. You will be under the personal supervision of experts. ma FOUNTAIN PEN Standard Training (autes Bes tUte 2ed SECURITY PEN CORPORATION) Repairing, Auto Painting and Trimming, Metal Finish- Dept. O 910 W. Jackson Blvd., CHICAGO Retreading, Bricklaying, Plastering, Plumbing, Con- ing, Auto Electrician, Battery Expert, Vulcanizing and — struction Electrician. If you really have ambition, if you-have the grit and deter- mination to get into your proper place, grasp this oppor- tunity NOW to earn more money and to occupy a worth- AND THE ONE BEST WAY TO LEARN IT while position in the world. Mr. L. A. Mandral, a STAND- _This great profession will make ARD TRADE GRADUATE, earned $89.50 his first week your successful future a certainty. 7 sale ” + The School of Engineering of and he expects to double it. Milwaukee has specialized for 19 og years in training young men for Hundreds of OUR GRADUATES are MAKING GOOD—se can YOU Electrical Engineering With a B. S. Degree in 3 Years. ? Institute eof Electrotechnics CLIP THE COUPON — NOW . (Academic and Electrical Train- le cD GD GED GED GD GEES GED GED GED GED Gum aus au Gm a= a= cue aml ing) —12 to 30 months, depending upon previous tion Electrotechnicians are in great demand and d STANDARD TRADE SCHOOL " Pay. Commercial Electrical Engineering— 1 year | | school graduates. Autemotive Electricity—a 3 to ( 416 Woodward Avenue, Detroit course will make you a highly paid specialist on a | Repairi Auto Metal Finishi ian) starting, lighting and ignition systems. Armature ‘Winding — Pebeinne A ee B one Buildin . = a Repair thorough 3 months’ ¢ uto Painting Auto battery Building actica lectric —f} to 12 months’ course to ! ! Auto Trimming 0) Auto Electrician 0) Mae Sate caremen will AID YOU EARN YOUR Way icklaying [ lasterin through our practical p a —o- = i action Electrician © operative industrial employment. Board and room Write today for our big free catalogue. Student activities, orchestra, daily broadcasting WIA‘ ING TERM NOW OPEN. Write TODAY for latest cataloe and ‘ull details. Mention age, education, and course of interes GCHQDL of ENGINEERING iwaukee 415 oF ™ Street, Milwaukee, Wisconsin]

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POPULAR MECHANICS ADVERTISING SECTION Thirty Lessons In Swimming by the Greatest Coach in ee for less than 10c a lesson Send for this Course on 10 Days’ Trial HIN K of it, a complete thirty lesson course in ming by the man who has developed more | and national swimming champions than r coach in the history of swimming. Among ls are Miss Ethelda Bleibtrey, double hampion, Miss Helen Wainwright, Miss Ail ggin, all record holders, and, greatest of strate all women swimmers, Miss Ge rtrude Ederle. Mr. r. No ind is also swimming coach of the New York janes, Club and captained and coached its water which held the national championship than ten years, sons and go on developing Everybody Ought to Swim and NOW into an expert, or you can > he course t« Anybody Can and peur money wilt be immediately refunded. We want you tosee this course — to study this method by which thou- sands of others have learned to swim — to try it out and satisfy yourself that you too can quickly learn to swim — not just paddle around — but really swim. Then, if you like, keep the thirty les- ly wants to swim and everybody ought to swim. s a glorious sport and greater still as a health and ng exercise. Only when you race through the water e and nerve tingling with the joy of real health can »w wonderfully beneficial it is. For men and boys is an ideal sport for developing vitality and en- r girls and women a sure way to slender hips and a f L.deB. HANDLEY , . : “a To metee Coeen limb that is the envy of all non-swimmers. Swim- : New York A s the sharp encounters of other women’s sports and : Ne w York W omen en's les ve > ‘ i © € > OwImMmMIngG « 2 around development that is remarkable. And and Coach American fun you can have this summer on your vacation if Women's Olym pic v, at,the beginning of the season. Swimming Team The Self-Teaching System of a Master Coach You have always wanted to swim always said that some day you would learn ver before was it made so easy toNlearn to swim. Mr. Handley’s —o 2 ‘i — ible self-teaching system is so clearly explained, so lucidly vanes | = val that you don’t need any one to explain the instructions or “3 ams ~ —— - to help you in the water. The illustrations show every = aat - reonas . > § f each stroke. The directions are concise and easily struction wouls oe ed And you are taught the complete stroke at one time Thirty ype for lees uu can go immediately into shallow. water and with the than : a > fidence begin to swim © need to learn separate arm gon and ax > i — ements, no need for tediou3 and tiresome land drills, no —— Ry on _— i need for rubber wings or for some- growins one : and ~ te hold you up, you begin bmn By a ny Oo swim at once. Then Mr. ot , Handley takes you back and bargain. shows you how to improve each But to make sure separate movement, how to get of the course you must make your reservation at once as this offer drive into your leg action, how to may be discontinued without notice. So mail the coupon today handle your arms to the utmost ths subscription to | movement into a pertecuy hare = HE MILO PUBLISHING CO. 2739 Palethorpe St., Philadelphia, Pa. Publishers of STRENGTH Magazine GTH Magazine in monious action that takes you STRENGTH is through the water at lightning ently the magazine speed. e888 8 8 EE Oe EE OE ES GG The Milo Publishing Comp P.M. 6- 2739 N. Palethorpe St. Philadelphia, Pa.

ng STRENGTH lagazine will appeal t strongly to read- ested in Mr. Hand- tendid swimming physical culturist th seeker Every contains dozens of on exercise, sports, great outdoors for men and women The system developed by Mr Handley is absolutely unique in the shortness of time it takes to teach you to swim. Think of learning to swim in one or two

cannot buy health <ENGTH can and Ww any man or how they can get ind keep it after e it If you are ling STRENGTH, missing something. juainted NOW re some very pleas: prises in store for Take advantage of ffer When you have ver the magazine course make your If you are not ted your money will mediately refunded t without delay, no time to lose.

half hour periods. That is all the time it takes to learn the whole of the famous crawl stroke by this new method. Think of it, in half an hour or an hour you are really swimming. Don't let the fact that you have never attempted to swim before deter you. This course will quickly convince you that you can become an expert in an amazincly short time. Nor does the course stop with merely teaching you huw to swim, it teaches you all the more popular strokes such as the crawl, back stroke, breast stroke and trudgeon, and how to perfect yourself in each Also how to float, how to tread water, how to save and resuscitate a drowning person and a great deal more than space permits telling here You may send me L de Handley'’s complete course “ Thirty Lessons in Swimming’’ and enter my subscription to STRENGTH Magazine for six months Upon receipt of the course I will deposit $2.55 (plus actual postage) with the postman in full payment for both the course and the at the end of 10 days I with the understanding that if am not entirely satisfied I may return the course and have my money immediately refunded. (I Canadian ($3.10) and foreign panied by cash (U.S. funds not entirely satisfied. lease write plainly) $3.35) Orders must be accom- subject to money back guarantee if

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POPULAR MECHANICS ADVERTISING SECTION STOP USING ATRUSS |makeChamps| ssersss-2> | « I can do for you what I have 7 done for thousands in every Tl branch of athletics—whether it be } for pleasure or as a profession, I can ten | guide you. Ask Charles Daniels, cham- oe jion swimmer, Tim Jordan, home run first bitter, Oswald Kirby, former golf cham- e — pion, Harry Babcock, World's F champion pole vaulter, and re : ‘9 a long list of others. They ' wil will tell you that my sys- Z ; th tem always starts a Inner surface is le) N rete , It right and keeps him righ od fe on-Slip. system never fails. Over 25 years made oupetee $e se- mebine:yetNon. | 0; as a trainer in all branches of cure the = " gid Pad andWhat ’ sports is my record—and I can still PAD firmly to the is Within it That 9 sper make the present day record holders body, keeping the Counts & sal step some to keep up with me. PLAPAO ecntienel. — “Pep Up’’—Let Me Help You ly applied and the from slipping. I hold theall-around world’s champion- ship. Picture No. 1 isa photo of mysel!. It shows my perfect body development I don't just. develop you so that you can show off. I pep you up, so that you are better able to do your dally work. Idon't try to make you do something you don’t like. Ilet you pick the exercise or sport you like best—whether it be body development, boxing, golf, run- ning, swimming, baseball or any of the fifty other sports. I tell you how to be- come perfect in the sport of your own choice. When you get fun out of some- thing, you surely get all of the real exercise, body development and limber- ing up anyone needs. J actually guar- antee to make you expert in the sport you select. You will find several sports pic- here, but these are only a few of the many ican help you in. Booklet FREE Write me telling what o straps, bucklesor springs attached. Soft as velvet—easy toapply- FREE to 5,000 Truss Sufferers To the extent of 5,000 sufferers who may apply I will send, ABSU LUTELY FREE, a sufficient quantity of the Plapao ‘to pos- itively convince them that this is the only logical, comr sense way of treating rupture. Plapao isa highly astringent medication placed within the Plapao-Pad and being absorbe gh the skin, creates a wonderful feeling of relief anc at the same time tends to strengthen the weakened muscles and thus permanently close the rupture opening. The process of speovery is natural, so you’!] have no use for a truss—you can way throw it away forever! Old and young have testified under i oath that the Plapao-Pads cured their rupture—many of ther long-standing, aggravated cases—without delay from work Patent allowed in U. S. and foreign countries, Awarded Gold a jal at Rome and Grass Prix ft East. P . —for a sufficient quantity of the Plapao - No Money is sent without charge to enable you to nor give it a thorough test; you pay nothing for this tria! now or ever, Write for it and full information today. Address Plapao Laboratories, Block 1427 t Louis, Mo. ‘ personally a booklet g peer oe BECOME A . =. tem never fails. Co SEIXAS ATHLETIC SYSTEMS, Inc, # ATILETIC SYETENG, te, Electrical Please send me Free Booklet by return mail. I am interested IN...++++eeeeee This obligates me in no way whatever. tutu || Engineer ' BBM ccccccvccccccceccccesscoccccccoseeoeeosocccecocccce In One Year S Biensetes iisnenibtbiinestennnsccnnndlMeutidsmenanicn Be tnows new branch of the Electrical Profession. k usiness as well as the technics of electricity. is a Consulting Efficiency Engineer, the man who knows how to solve commercial engineering problems. it here, in laboratories costing over quarter million dollars — in America's Greatest Institution for E A ra T AR Oo U HH L Fiostrieal Education. , Other courses: Automotive Electrical meer, ear; Armature Win . 3 months; Practheat Electricity. 6 months; Eh — jectrotech- nics, 18 months; Automotive Electricity, 3 months; trical Engi ADVICE F R E E EARN WHILE YOU LEARN— You can easily get rid of FREE BOOK TELLS How Geafness, ear aches, head w= year now opsning Write quick for big FREE Book, a and all other ear troubles. Mr. Folds suffered 15 years | Sducetioe ani epusse totaseshe ag — and was relieved almost at once. Read his book, “How to : FREE BOOKLET fave Satie iany, | Soo mance FREE. Send for it today. ° iwaukee Dept. N., Aurine Remedy Co., 1801 S. Racine Ave., Chicago, Iil. Dept. C508 415 Marshall Street, Miiwaukee, Wisconsin Lace ee ee See eS we we wees eee Bees use 7, What is Going to, re Happen foo ?| u a Do you fear what the future has fn store for yest -— re goumpanty wormed Eat some- VIRGO WILL FREE { mg dreadful is going to happen? Stop worry- ing. Learn what the stars predict. Tic TELL you | ancient science of astretecy reveals all. Simplysend in your name and address and I will interpret the jac sign you were born under. Be sure to state the | exact day, month and year of your birth in yourown hand writing. Enclose 12c to cover cost of mailing and postage. Your astrological reading will be sent io. written in plain language, mailed sealed, postpaid. You will be over- with the good news. Don’t wait, send birth date and 12e NOW. VIRGO STUDIO, 38 Howard St., New York, Dent. 655

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POPULAR SiECHANICS ADVERTISING SECTION | Salesmen—BE One! fellows who are making anywhere from thirty thousand dollars a year—who travel ss, stop at the best hotels, are in daily con- — with prosperous business men—did you ever fgure out what it is that enables them to SELL ith such success? \'t be size—or good looks! — rwise keen sales executives would specialize in furniture heavers and chorus men —whereas some of the best salesmen you ever knew measure less than five feet five and are so homely that you actually feel sorry for them. It can’t be schooling— Othe rwise only college graduates would hold > Tet rds—and men like Schwab wouldn't a chance in the world. t be any special GIFT which they inherit— re’s many a salesman straight from the land where ~ grows—his father a farmer and his father’s > him—who fairly astonishes the “boss” at the rings in the business. n't any of THESE things—then it is surely possible NY man of average intelligence — provided he has the ge to TRY and the willingness to LEARN—to become sful salesman. r the REASON for success in selling is nothing more ss than the knowledge and application of SALES- SHIP. 3 T that knowledge and APPLY it—whether you are now the selling field or not—and we predict that your | mount and will NEVER CEASE TO MOUNT— s your health is good and you stay in business! How You Can Get the Training That Will Bring Success i statement, you may think—but it is based on bed- $ ng LaSalle Extension University was preparing its n Modern Salesmanship, it made a careful study, over of years, of the selling processes of more than a thou- tanding salesmen engaged in selling a wide variety ts and many different types of service. These men eady rated as exceptional. Their records proved it. r the direction of a nationally known sales executive— $50,000 man—the particular methods which were found ie highest percentage of results were sifted out—and ears, and at a time when selling was anything but ore than four hundred salesmen—comprising a num- arate sales crews—were instructed to specialize in rticular selling methods. f this test came unusual and often surprising results. t men on various forces—in lines ranging from boots es and electrical apparatus to motor cars and life in- olicies—thru the basics furnished them MATERI- INCREASED THEIR SALES. esman stated that what was furnished him was re- for the establishing of more than 100 new accounts in ry and a large increase with his old trade, ses of 100% and in some cases 500% were reported. » strength of these findings, the identical principles ids used by these menand proven sound and prac- the severest kind of tests, were organized and incorpo- ) 9 present training offered by LaSalle in Modern \G AIN they are proving out—as witnessed by the fol- tatements, typical of hundreds that have been received e within the last few months: he first two texts have given me so much that I rmly convinced that if I never learn anything e from the course, I would have a full return for ntire investment. I tell you frankly that I would t take $25,000 for my scholarship if another could be had.”—C., J]. JONES, Canada From a salesman in the ranks, in two short months my sales have shot up nearly 150 per cent, and I have received a promotion from a company I had been with only six months. I am now a district manager with eleven men working under me. Not only have my immediate sales shown an increase—and right in the middle of the summer months—but I have had a keener grasp of the principles of selling. I know the meaning of ‘fundamentals’ now: I know that by the application of certain definite truths, certain definite results can be attained. My effort, formerly more or less of an uncertainty, is now a certainty. Getting down to brass tacks, I know what I am doing now.’ —C. RUTHERFORD, Ontario. Send for “Modern Salesmanship” To explain within the brief limits of a page how LaSalle training in Modern Salesmanship is conducted, or to give more than the barest hint of its value to the man ambitions to de velop as a salesman,is impossible. We have therefcre prepared a 66-page book entitled “Modern Salesmanship"’—an interest ing and compelling presentation of the present-day opportu nities in salesmanship and a clear outline of the way they may be quickly realized. No man engaged in selling—or looking forward to salesman ship as a career—should be without a copy of “Modern Sales manship.”’ The University will be glad to mail acopy to any man. who marks and signs and mails the coupon just below this text. There is, of course, no obligation. ———— = J VOULTRY COUPONS LASALLE EXTENSION UNIVERSITY The Largest Business Training Institution in the World Dept. 664-SR Chicago, Illinois Please send me catalog and full information regarding the course and service I have marked with an X below. Also a copy of vous book, ““Ten Years’ Promotion in One,’ without obligation to me. O Modern Salesmanship Training for position as Sales Executive, Salesman, Sales Coach or Trainer, Sales’ Promotion Manager, Manufacturer’s Agent, Solicitor, and all positions in retail, wholesale, or specialty selling. Other LaSalle Training Courses woes fala te theres ,a. 8, ss training insti- tution in the world. It offers training for every important business need. If more interested in any of these courses, check her: O Busi M g t 0 Modern Business Corre- O Traffic Management omen se and Practice I ern Foremanship ener a eee a and Production Methods ailway Station Man- OPersonnel and Employ- agement ment Management OLaw—Degree of LL. B. O Expert Bookkeeping OcCommercial Law O Busi Cc a Management 0 Sesemaneieiinentdh efficiency : ee O Banking and Finance Sy wey Name Present Position.. Address

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POPULAR MECHANICS ADVERTISING SECTION Get into the automobile business to make big money. More trained men are needed now. Over 15 million cars now in use. All “need repairing, overha ing. Motorists want to economize—make their cars last twice as long men must keep them in repair. 70 million tires to be re-treaded, put into longer use. Millions of batteries must be repaired. Right now this spells the greatest money-making opportunity in the world for ambitious, red-blooded, “ go-getting’’ men. More Money Spent for Repairs Than for New Cars I wonder if you realize what an enormous business the repairing of cars really is. Last year the price of all the new automobiles sold was $2,500,000,000, on which the dealers made a net profit of 3 or $75,000,000. But look at this: the selling price of parts used on repair jobs was $2,900,000,000 or $400,000,000 more than the price of the new cars, and the profit on these repair parts was 15 $435,000,000. Nearly six times as much profit on service as on new cars. But look : again: this is only on the parts used in repair jobs; it doesn’t include the charges for t! which run as high or higher than the parts and materials. When you add that, you see that th spent for repairs is many times greater than the money spent for new cars. The repair business is the business to get into. And now is the time to get into it. NO EXPERIENCE NECESSARY | In a few short weeks, under “ Michigan State” guaranteed training, you can become a first-class, all-around, pra and tractor mechanic, capable of filling a garage job at bigger pay. Or, you can quickly become an Auto El ectrician, 2 your earnings. You can go into business for yourself—start a garage—electric service station—tire repair sl station—or welding shop. You can sell cars, trucks, tractors, farm-lighting systems or engines. certain money-making future. Trained It’s a great | Special course in Business Management and Salesmanship is included at no extra 1 Endorsed by Big Factories YOU, TOO, CAN SUCCEED! You have the ambition—you want success. Success is certair Read These Letters willing to work for it. You can have —o— —be your stop the plodding, get into work you like arn big money, be| pl happy and paope sndent. You can do it just as well, or better, } D op 6 Ee 5B R OTH ERS than Ed. Wamhof, who writes: “I now have charge of a gar onronare average $350 to $375 a month.’ Thousands of sin ~~ successt ‘Michigan State” graduates. Rec a seem amazing, but the) T iT. u.s. — wii ordinary. It is all done through head and hand training at the ane are a nachos State Auto- State Decide now to give yourself the training that will pa mobile School of this city to be an exception- and establish you in a successful life work. ally high class school, and no doubt a diploma a yo irom, this school wens yg Fy yy COME TO DETROIT—THE AUTO CENTER o ning employment w gh class auto- . mobile dealers.”’ To the School in the Heart of the Automobile Business — Come to Detroit, to the “MICHIGAN STATE Al rOM ; SCHOOL. This is the way to get started ery wy the ladder o! 2 Mot Detroit, the automobile center, in the heart of the industry, 1s t a - Buren on COMPANY PY ace to learn the auto trade. Here a car fare will take you t “We bell the MICHIGAN STATE ‘ORD plants, or the PACKARD, the C eiG oe i SDE I > alia. Tete aAN ‘ ESSEX, HUPMOBILE, RICKENBACKER, PAIGE, STUDE! og he hg FE MAXWELL, LINCOLN, DODGE, or to more than two bund: cal training is most thorough and complete fifty accessory factories— right in the very headquarters of th in every detail.” at the fountain head of this great industry. 79% of all cars arem ade rif No other place can give you the same opportunity for first- -han THe STUDEBAKER CoRPoRATION % i Cc * i G A hk % T ATE OF AMERICA “We do not know of a better : gue school than the MICHIGAN ST 306 Auto Building Detroit, Mich.

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POPULAR MECHANICS ADVERTISING SECTION “ lTrain Head and Hand! AGzZeler ms of : r Methods | Money Back World ws better hew to teach autos, trucks and tractors than the men who build them? Guarantee | s n know how training should be given to make the most valuable men. The ars se he * Michigan State”’ (Detroit’s Auto School) are outlined with the assistance I personally guarantee that a eaders of the Auto industry and are endorsed by them. Here you have up-to-date ogy ae = co —_—-. the Michigan State utomobdie test moc s, t £ s € c eal y t. ete | ’ 1odel cars, trucks, engines, transmissions, axles, electric equipment, et« School, will qualify you for a posi- z complete to give thorough training. tion as repair man, demonstrator auto electrician, garage man, auto- mobile dealer, tractor mechanic and operator, chauffeur or farm lighting expert: or refund your ‘‘The Summer Resort’’ City money A similar guarantee is made with all courses Each ness is always good. Where weather is always fine. Detroit's location in course includes Life Membership ney he Great Lakes gives it ideal climate, not too cold in winter, not too hot in sum- pg nny PL, tig a is the er. Get away from the burning sun into the cool breezes of Michigan After school - rl G ZELI ER rs, enj it trips, swimming, fishing, sailing, canoeing on the lakes and river. See President and General Mana augue baseball games—see Ty Cobb, Babe Ruth, Eddie Collins, Tris Speaker, MICHIGAN STATI son, George Sisler—all the stars. Spend a pleasant summer and improve AUTOMOBILE SCHOO! yourself at the same time. We work hard up here but we believe in some good times too. DAY OR EVENING CLASSES— Learn in a Few Weeks EARN YOUR WAY Stay as long as you like A”*thorough training is the thing that fills the pay envelope. 4 ou can take a full Automotive e . Yourse, or specialize in any one of its money-making igh if you have to. Our Free Employment De- branches. You can be an Auto Electrician; a Tire Expert get you a job in Detroit and you can } the a Battery Service Man; a Chauffeur; a Repair Man, a ses Exactly same training, under same instruc- Welder: a Machinist: or specialize in motorized farming, equipment with special truck, tractor, or farm electric-lighting and DETROIT-TRAINED MEN GET BEST JOBS farm engine training. Life Membership included with all courses ‘AN STATE AUTOMOBILE SCHOOL is known er. Wherever autos are used—Detroit-trained men t jobs, highest pay. Auto, truck, and tractor fac- Michigan State"’ graduates. Leading factories, ges, and farms want men who have trained their is their hands—the “ Michigan State” Detroit- Ths ILLUSTRATED GATALOG feeeeeeeeetatoe oe {Nissen make mere money. Decite Now WF LM LTD ATLL fo rever disc ard the old, pleddine, _ -pay life. Michigan State Automobile School ,208A%'°,8z!isie ion, this big illustrated book that tells all about Send me FREE and without obligation your illustrated e “ Michigan State” can do for you; also book catalog and complete information about Detroit-training te e Best Judges of An Automobile School?” Positive t make the most money.

way to learn is in day classes. But you can work

s! Youcandoit! Work is a pleasure when you ill the interesting facts. We will send you FREE, ito getit. Send coupon or post card today AUTOMOBILE SCHOOL 29 Woodward Avenue, Detroit, Mich. Bc Do you —y fer to start your training at home or Name

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POPULAR MECHANICS ADVERTISING SECTION LCN ON OPEL

Tobacco Is Hurting 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— , akan Free Proof men allover the country telling how from the tobacco habit or my money will! they have been absolutely freed from the tobacco habit by this simple home treatment. You could not ask for stronger proof that Tobacco . Redeemer wil! free you from the habit than the evidence we will gladly Name send on request. Just mail the coupon—or a postal will do. NEWELL PHARMACAL CO. Dept. 300 St. Louis, Mo. &

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POPULAR MECHANICS ADVERTISING SECTIOw. DT aa GE ee Is THIS Why the Boss Laughed When You Demanded Bigger Pay ? ee) Did you notice how The Chief gave you the “‘once-over’ the “up-and- down’”’—taking you in from top to toe? He Was getting your number—taking your measure—deciding in his own mind just how far he dared to go with you. THEN HE TURNED YOU DOWN FLAT! He knew he had you licked before you started. And there was scorn in his eyes, a sneer in his voice, a sting in his words of refusal. You were in the right and he was wrong—but he bluffed and bullied you out of what belonged to you. Andwhy? Simply because he knew that— HE WAS A STRONGER MAN THAN YOU! Not just because he was your superior in position but because he was your master in the stern, rugged qualities of dominating manhood. He had stronger nerves, a clearer head, greater daring and more fighting force than you ever dreamed of owning. AND THAT’S WHY HE’S THE BOSS AND YOU’RE THE MAN THAT’S WORKING FOR HIM. ONE THING HE NEVER COULD LAUGH OFF. Listen, my friend. What do you think would have happened if you had shouldered your way into that bird’s office with your proper fighting weight of clean, hard muscle—with a cold glitter in your clear eye—with the fine upsts anding — of a man to whom fear is only a word i in the dictionary? Would have laughed that off do you suppose? Not on your tintype, my friend—not on your life. He’d have given you the raise you asked and apologized for not making it a bigger one. YOU ARE A VEGETABLE! Yes, you can craw! out of bed in the morning and totter off to work without the help of crutches. You can last out the day and stagger home again without falling dow: } You can draw a pay envelope every so often and support yourself without charity BUT THAT ISN’T LIVING—THAT ISN’T MANHOOD. ‘THAT’S JUST EXIST- i ING—JUST VEGETATING LIKE A CABBAGE IN A PATCH. I°D FIGHT LIk] A FIEND before I would submit to such a servile life as yours. } I'D MUSCULARIZE INSIDE AND OUT. I'd energize and I'd STRONGFORTIZ1 j until every muscle on my body was rippling with joy and every organ inside of me was } hitting on all six cylinders ‘d win a digestion like an ostrich’s and a vitality like a itiger’s. I’d gain white nerves and clean limbs and strong lungs. Then I'd step on the i gas, blow my horn and tell the world to look out because I was on my way Health—Strength—Vitality STRONGFORTISM = . . 7 with Scientific Muscularity For 25 Years I have taught the science of Mastery through Health, Stre ngth and Vitality iI have “muscled” more successful professional stage ‘‘strong men” than any 1 1 ysical jinstructor who ever lived. I have brought lasting happiness and success to thousands of pupils who came to me much worse off than you are and who have risen infinitely higher in the world than that tough boss of yours can ever hope to climb ARE YOU LISTENING TO ME? Are you with me or against yourself? To oblige me will you CONSENT to become a successful man—a big man in every sense of the LIONEL STRONGFORT —— “) M SS. oe tiny t through sheer power of body, OR. SARGENT, of Harvard, dectares that ——- . nota I : ‘Sicngtort ia induantionasty the finest sbec= YES? Then SEND THE COUPON NOW! A Book That Chills and Thrills Bite ~~ na good natured mood I have decided to make you a present of s LIONEL STRONGFORT, Department 1423, Newark, N. J. y wor 1-famous book of the body, *‘Promotion and C 2ON~ §Send me your big 54 Page Illustrated Book of the Body, postpaid servi ation of Health, Strength and Mental Energy.”’ sand without cost or obligation to me. It may teach me something Beautifully illustrated, it contains the man-building experiences $startling about ME. Send me special information on subjects f rowded 1 1 th ccor of sick, 2 ™4rked (X) below, without obligation. : wded quarter-century devoted to e succor 0 Colds Skin Disorders ed, hopeless, helpless men. It is an absolutely necessary Cetarsh Debility ny man who is afraid of his job or dissatisfied with it Too Fat : Vorpid Liver * k 1s yours (free ostpaid and without obligation) if Too Thin ; . Vitality Restore nd the coupon dy : Stomach Trouble i Muscular Development I Flat Chest Great Strength ..Bad Blood Rupture Lionel Strongfort == = Physical and Health Specialist for 25 Years = °°" es :; Dept. 1423, Newark, N.J.,U.S.A.}*°"""" omni BOBTEEB. c ccccccccccccccccsccccccccocceseces

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POPULAR MECHANICS ADVERTISING SECTION MECHANICS’ [9 HANDBOOK Travel The D & C Waterway 4 On the Great Lakes Restful-Economical-Healthful-Sate pains You'll enjoy a trip on the palatial, ho ke D. & C. Steamers that make daily trips — vee Be Detroit and Buffalo, and Detroit and Clevelar MECHANIL Direct rail connections at these three cities for HANDBOOK all sections of the country. Detroit & Buffalo Detroit & Govtead Lv. Detroit 5:30p.m. | Ly. each city 11 p.m Lv. Buffalo6-00 *Daylight trips dur- — Halo O:UV p.m. ing July and Aug. Fare, $6.00 one way, Lv.each city 8:30a.m. $11.50 round trip. Fare, $3.60 one way, $6.50 round trip. * Operations subject to necessity for service. Schedule sulgect to srnge without notice. Berths $1.80 up:state- rooms, $4.20 parlor $7.20 u Rail tickets are ac cepted. ‘Automobiles transported. Gas must be removed Wireless aboard. For reservetions and further informa tion address agent at port af devartur. ae DETROIT & CLEVELAND BAveeATION co. : ‘ yy —- Detroit, : . A. Schantz, Pres. & Ge ™ 4 330 PACES | J.T. McMillan” R. G. Stoddard Vice Pres. Gen. Pass. & More than 300,000 sold | Ticket Agt. ANDIEST book of its H kind ever written. Pre- Only pared by experts under the direction of the Interna- tional Correspondence Schools. Written in lan- guage that you can under- stand. Note this partial list of subjects: Weights and Measures; Easily Under- The Only Right Way 7 Reaas a stood Mathematics; Formulae; Mensura- tion; Belting; Hydro-mechanics; Strength P ti } EF] t t of Materials; Boiler Design; Care and In- rac 1¢ca ec rica spection of Boilers; Horsepower of Boil- 2 Learn by ers; Chimneys; Exhaust Heating; Machine Education the thor- , 2 y ough ap- Design; Horsepower of Engines; Boilers proved scientific methods which our seven- and Pumps; The Slide Valve; Belt Pul- teen awe of -lww- enable tego ‘ dome ‘ you. A.C, and D.C. Armature nd- we! yr ee ee mg coo ing, Wiring and Footing. Practical antes Enectrtemys Curvens; Wome Electricity, Drafting, Electrotech: Dynamos and Meters; Batteries; Cable nics, Commercial Engineering, Electrical : s Engineering with 8B. S. Degree. “Earn Testing; Compass Surveying; Curves; While Van tana.” Radio. Broadcasting Leveling; Etc. WIAO Every Day. Next term opens soon. ‘ 2- “d Catalog Just mail this advertisement with Book Free — p Ri ty Bag ory nd a dollar bill and your name and interested in: Dothisnow. Obey that impulse that bur address, and this 330-page I. C. S. you. Many men who have taken this simple step are Mechanics’ Handbook or any of the perous, successful experts. Write quick. other I. C. S. Handbooks that you | SCHOOL of ENGINEERING of BEL W AUKEE want will come to you by return Dept. Peos, 41§ Marshall Street, Milwaukee, W s. mail, ~Naumationan comumronpewen sonore 1) CULO COI EE Se hg | INTERNATIONAL CORRESPONDENCE SCHOOLS | Box 5606-D, Scranton, Penna. Wi LL DAY fe) I enclose $ for which send me, post-paid, the Hand- books marked X, at $1.00 each. It is understood that if $200 TO $500 AMONTH I am not entirely satisfied I may return any or all of them within five days and get my money back. 50 DAYS pre) | NOW 0 MECHANICS’ HANDBOOK THIS BOOK TELLS YOU HOW _] Automobile Handbook Radio Handbook Electrical Handbook Salesman’s Handbook lif 50dar C) Chemistry Handbook (CJ Advertising Handbook Ambutraining qualifies youin 50da Au saw () Building Trades Handbook (JBooxkeeper’s Handbook for positions paying $200 to $: 500. Ctr; tivo amonth, No previous experience a ity necessary. 10 years manufacturing experi- ~~ ence behind Ambu training guarantees our fitness —our high percentage of successful graduates guarant e method. A successf-1l Ambu graduate lives near you a —or ask us for hisname. Write for FREE Book, * $100 a Week in Automotive Electricity” that a 1 we make this big money yours in 50 days. Send for it to AMBU ENGINEERING INSTITUTE Dept. 16 2632 Prairie Ave. CHICAGO | in : ‘4 in quvamnevemennenamemnemannatt

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POPULAR MECHANICS ADVEkTISING SECTION 500 % AG ENTS PROFIT Genuine Gold Leaf Letters GUARANTEED TO NEVER TARNISH For store fronts, office windows, Bank windows, Office Doors, Pan- els, Board Signs, Trucks, Auto- mobiles and Glass Signs of all kinds. Anyone can put them on and make money right from the start without previous experience. All you have to do is to show your samples; the letters are very at- tractive and easy to sell. Letters costing 4c sell for 25¢. One agent says: “Your Letters are the best thing I have seen in years: I have made $125.00 the first week and still going strong.” Paul Clark says: “Smallest day $28.70. H. Gilder made $835.00 in six weeks. $60 TO $200 A WEEK ane > is ony to appoint sub-agents for GENERAL AGENTS — 1° is easy to as — = m all orders — receive from local agents ap- j you anywhere. We allow you 50% discount on your You can sell to nearby trade or travel all over the y, as you please. Large demand for window letterin Write today for free sample, full particulars an liberal offer to general agents. Metallic Letter Co,, 433-C N. Clark St., Chicago WEAR SEMEN FREE OUR MARVELOUS MEXICAN DIAMONDS have delighted thousands of customers for 18 years. They posit mater ame perfect cut, same ay of rainbow fire. Stand intense acid test of side om parison e ne. aperts itivel their experience to — any —y Per- 4 ™ms you admire on your closest friends are mexican” DIA NOS and you never knew it Tet 2 MEXICAN DIAMOND pba you ear tip pt See any difference, HALE PRICE TO INTRODUCE n yy pS to new customers. 3 ageme these prices- h e jest helt eur prices. Ladies 1 et haleeie fine tk gold $2.63 y ents Heavy Tooth Belcher, 1 ct.gem, 14k gold! 3.25 '— Ladies 3 stone Duchess ring, fine —+— finish, two " tirst water Mex. diamonds, one blue app hire 5.90 ie. & "o> : rae Gypsy ri i piatino finish, biack r water . Diamond 438 SEND NO “MONEY Sust send name. address and slip of abe St. that meets around ring t noe to show size whieh rin ; wpuly . On arriv ~ t-. — not to ee Bee it, return -%. 7 aame os end we'll refund AY. Agents We XICAN"' DIAMOND IMPORTING co. LAS CRUCES, M. MEX. ustve Controllers of Mexican Diamonds for 18 years. _ ee a Year T is now possible for any man, re- gardless of education or experience, to be trained for a big pay job at the Stewart Automobile School in New York. Thousands of successful graduates since 1909 testify to the excellence of the Stewart system of individual in- struction with tools. We find a job for you if needed that enables you to support yourself while learning. After you graduate we can place you in a good pay position. You cannot lose. Special Business Management Course Free—for a limited time only. Tuition for this course is regularly $50, but you will get it free if you enroll now. catalogue describes in Free Boo detail the Stewart School and its exclusive advantages; how you can be independent and successful after only a few months’ training. Send for it today. Simply fill in the coupon below and mail it now. It will open the door to your Success Our new big FREE How You Can Make $3,000 to $5,000 EWART AUTOMOBILE SCHOOL STEWART AUTOMOBILE SCHOOL (Founded 1909) 225 W. 57th St., Dept. A175, New York, N. Y. Please send me your free book that describes your school and the opportunities in the Automobile Busi- ness. I am under no obligation. | | | | | ‘al

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POPULAR MECHANICS ADVERTISING SECTION AKE a box of lunch and your fishin’ rod—and let’s break away from the hot, dusty city! Let’s pick out a nice cool quiet trail which no automobiles can find; let’s take a 50-mile spin and fill our lungs with the cool crisp air—and then for the ol’ trout stream. That’s real fun! The Joy of Owning An Indian Scout It takes you anywhere — any- time——quickly, cheaply—comfort- ably. The Scout is light, powerful and perfectly balanced. Equipped with the new Indian Fork which absorbs all shocks of the road. Goes 60 miles to a gallon. Tires good for 10,000 to 15,000 miles! 100 pounds lighter than average motorcycles. Ask your local In- dian Dealer about the new Scout— or write us for free descriptive literature and name of your nearest Indian Dealer. Gndian Motocyele Co. Dept. P-6 SPRINGFIELD, MASS. a Make More Money | Shiny => Autos: > , & = * ra Get int _ est, brightest ing business, 7 there—the busin« had—the profits are la demand is every wh« future is unlimited. This is y. now to step right into ABusinessofYour Own with opportunity all around you body will operate these auto pa that the country must have—wh All you have to do is know how t work, and this we teach you No’ Previous experience require: large capital needed. Start in w bn J own knowledge and soon business paying you $3,000 to $15,000 Year We teach you so you know exa: cars of all makes are painted at tory and can do strictly bigh gr which makes you satisfied cus brings you more business. O teaches you so you can gor ght factory and get job painting au for auto dealers everywhere. Just give us a few weeks of your t’s all, and you are ready for j ———— for yourself. You should certainly get the fac Us and learn the way to better ADDRESS Detroit Auto Painting Schoo! 36 D. A. P. S. Bidq., Detroit, Mich Book of Newest Styles just out FREE men’s, children’s clothing on credit ar prices, less than cash prices everywher fashions; best materials. Open a charge account with us, | and save money! Dress in newest styles. Send for Style B FREE today! Elmer Richards Co., Dept. A177, W. 35th | Street, Chicage PAUL REVERE| BICYCLE A sturdy depe cycle all and parts | guaranteed f 7 models to i 12 montt Ss t t | | ress char ie) MYEROW BROS | uy, a. c ; Dw 8 mass. | Get this Wonderful Book without cost It is written by the mai trained many of the world strong men. Tt tells you how t Vitality, Energy, Endurance Nerve Strength, Muscular Strength, Perfect Physiqu« My new 64 page book, “Building Bett is just off the press. It contain clearly written information you ¥ ing 30 halftone illustrations of my) among the professional ranks. It t you are weak and underdevelop« grow strong; if strong, how to er It expiains how to develop the muscles—a strong heart and vigorou —in short, how toimprove health a: internally as well as externally. If you will send me 10c in coin or st help pay postage and wrapping, ! you a copy at once. Send TODAY PROF. H. W. TITUS * ew’ vor: Dent 59 PROF. TITUS as he is today No m scien bran¢ Don’

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POPULAR MECHANICS ADVERTISING SECTION ew Kind of Hat Worn 10 Minutes a Day Grows Hair in 30 Days ~or No Cost No matter how thin your hair may be, this remarkable new scientific invention is absolutely guaranteed to give you a brand new growth of hair in 30 days—or it costs you nothing. Don’tsendacent. Just mail coupon below. By ALOIS MERKE Founder of Famous Merke Institute, Fifth Ave., N. Y. HAVE perfected a new invention that I absolutely guarantee will give you a new head of hair in only 30 days—or the trial costs you This new invention—the result of an experience gained in treating thousands of cases of baldness—is in the form of a new kind of hat. head just 10 minutes a day. It is worn on the No unnecessary fuss of ykind. Just put the hat on your head. Wear it And that’s all there is to it. Sounds impossible, doesn’t it? All right. Then t me emphasize this fact. I don’t care how thin rhairis. I don’t care how many treatments you have taken without results. Unless my discovery actually produces a new growth of hair on your head in 30 days, then all you need do is tell me so. And without asking one question, I will instantly— and gladly—mail you a check refunding you every u “ave paid me. How It Works My invention proves that in a big percentage of hair troubles the hair roots are NOT dead, but merely dormant! The reason ordinary measures failed to restore 10 minutes. penny yi My new invention gets right to the cause of most of hair troubles— the starving dormant roots. Your hair grows just as a tree grows—from the roots. To make a tree grow you wouldn’t rub “growing fluid’’ on the bark. Instead you would nourish the roots. And my invention pro- vides, at last, not only an efficient way of stimu- lating these dormant roots, but of giving them the nourishment they need to grow hair again. What Users Say I have been bothered with dandruff for twenty years and had lost nearly iofmy hair. I have used your treatment 30 days now } have a good growth. ‘of lair coming in. I cannot Say too much in praise of he Merke Treatment.” C. H. “Treatment _ positively shows quick results. After ive weeks’ treatment a new th of hair has shown ach side of the temple, I have been bald for C.B No Risk of Any Kind At the Merke Institute, Fifth Avenue, N. Y.., which I founded, stage and social celebrities have paid as high as $500 for the results secured through personal treatments. Yet now, through my new in- vention, these results may be secured in any home where there is electricity—for just a few cents a day! Remember—I don’t ask you to risk a cent. I rea my treatment will not grow hair for EVERYBODY are some extreme cases of baldness that nothing in the world can help. But my new invention has already grown new hair for so many hundreds of others who had long ago given up hope that I am willing to let you try it entirely at my risk, and if it fails then I lose—not you lize that There Free Booklet Explains Invention If you will merely fill in and mail the coupon below gladly send you—without cost or obligation—an 32-page booklet, “‘The New Way to Make describing my new invention in detail This booklet contains much helpful information on the care of hair—and, in addition, shows what my treatment is doing for thousands of others No matter how nearly bald you are—no matter how many treatments you have tried without results—this booklet will prove of deepest interest to you. So mail the coupon now and it will be sent you by return mail. ALLIED MERKI INSTITUTES, Inc., 512 Fifth Avenue, Dept. 166, New York City ALLIED MERKE INSTITUTES, Inc. Dept. 166, 512 Fifth Ave., New York City. Please send me, without cost or obligation on my part, a copy of the new booklet, *‘*The New Way to Make Hair Grow," describing in full detail the Merke Institute Home Treatment I will interesting Hair Grow,”

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POPULAK MECHANICS ADVERTISING SECTION TOP WAGES / GOOD TRADE | A very small investment in one or more of our painting courses will enable you to make more mone y Highly skilled instructors teach you sign and pictorial painting —decorating— HARRY GLICK graining— —marbling—show card writing Principal - paperhanging — auto painting. This is the world’s leading School of Painting, as I can prove: you if you will come and see what we are doing . THE CHICAGO PAINTING aa SCHOOL WILL EQUIP You || TO MAKE MORE MONEY If you are now a painter, I can show you how to ir your earning power. If you have not chosen a trade dissatiste “i with your present one, we can start you t The First Iver Johnson | |) orton ot cone Come to Chicago and talk it over with me. a enroll, I will refund your Send for + railroad fare I know you will want to Bic cle stay, because you will be impressed by F Me E E our work, by what we have done and are doing tor others, by the type of me ] Catalogue who are directing this splendid work of ‘THIRTY EIGHT years ago in a small making better ail-round painters, decorators,sign writer New England workshop, Iver Johnson, =| f] BWA Priifseng nye esos br ur handeone mechanic-inventor, built his first bicycle. Pay Your trated catalogue by return mail. A . 7 Harry Glick, Principal. In looks, it was a crude affair compared R. R. Fare to the present-day models, but it had those | to Chi Chicago Painting School sturdy, superior qualities that in a few | o CagoO 148 W. Austin Av., Chicago, Ill. years made the name Iver Johnson famous - } wherever bicycles are known. 0 + Ml cg mbes 3 ing cate ard " HOME “FLIVVER” amous Features |_| MOVIE-MACHINE|RADIO SET The Iver-Johnson Truss-Bridge construction $7.50 Postpaid $2.95 Postpaid assures absolute rigidity, preventing give and sway Uses same films as in big the- | hig whirlwind cor of the frame during fast pedaling, oushing up atres. 100 feet film only 75¢ i : . - = - guaranteed equa! hills, or through sand. Also made in l‘rop-Bar with best stars. Not a toy. | qualities to ans Guaranteed to satisfy. won- eon me models. . | | derfus ente ta‘ner. ibe eng A, Be The high carbon seamless steel tubing tsed in Send -day for free catalogue of Home Movie outf Iver Johnson frames and forks has a tensile strength | c 22, Radio, Seta and Radio parts. We seli them a of 90,000 pounds to the square inch! lkor« -rowns, | | PARAMO NT MFG. CO., Dept. M3, BOSTON, MASS., U.S.A cranks, fork-ends, han“!e-bar stems, seat posts, and other parts are of genuine drop-forgings made 12H. P. Gasoline Engine $950 in our own plant. MPLETE 50. 40 The two-piece crank set and two-point ball bear- } . Castings "~ ings will outlast any other type, and make pedaling ; and as Gen. Cat. N easy as walking. ; ims Eng. Cat. No. 24, 20c. Bot Iver Johnson Bicycles are made to fit all sizes : for 40c stamps (4 dimes of men and women, boys and girls. Colors: Ivory : Refunded first order. Black, Copper Bronze, Poilu Blue, Iver Johnson Blue and Maroon. Best guaranteed equipment. MODERN ENGINE & SUPPI } C0. 334 Monadnock Bik. CHICAGO, ILL Write for Free Booklets _ Catalog ‘‘B”’ illustrates and describes the com- : The Triple Duty Charger i >yc L : Charges radio 2, 4 or 6 volt “ batt plete line of Iver Johnson Bicycles, as well as Iver E Charges radio 3. 4 oF 6 volt aot att Johnson Velocipedes. ° socket. Average cost per charge ” : . Solidly built—wili not get out of or Catalog ‘‘A”’ illustrates and describes the com- ; end quuple. The frst suecessful ee ‘ . duced over ten years ago ype plete line of Iver Johnson ‘‘ Hammer Want of Rockies $22. Type € fo the Hammer Safety Revolvers, as ; auto batteries. rice $15; West - i i : *B’’ battery charging attac men well as Iver Johnson Champion Single ’ Write = 7 a6 nome of a Barrel Shot Guns and Hammerless Sef, supply you with the genuine FF chars Double Barrel Shot Guns, FRANCE MFG. CO. wesw 10426 Boren Read CLEVELAND, OHIO IVER JOHNSON’S ARMS & CYCLE WORKS 4 River Street FITCHBURG, MASS. New York Chicago San Francisco 151 Chambers St. 108 W. Lake St. 717 Market St. IVER JOHNSON a BICYCLES as ee

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yD. S.A. | 2 i” LY CO. AGO, il L. arger DIO DRAWING— \=> Free Course —_ t, ROY C. CLAFLIN President of the Colum- f Drafting you er the personal 1 Roy C. Claflin, president of this gives you his f cooperation of thousands of e been benefited highly efficient yf training are a f of the value of Mr. Claflin'’s of experience as nal Draftsman, as teacher, especially tor this great } a This Drafting Set is & part of the course. POPULAR MECHANICS ADVERTISING SECTION HE popularity of the Radio and its increas- ing field of usefulness have created a keen demand for men who can design and draw plans for Radio equipment and layout. Get in on the ground floor of this profitable occupation. Here is your opportunity to learn RADIO DRAFTING FREE As soon as our regular course in Mechanical Drafting has been completed the graduate is entitled to take our Radio Drafting Course Free of Charge. THIS OFFER IS MADE FOR A LIMITED TIME ONLY — therefore do not delay and miss the chance of this unusual offer. Write us today \for full particulars. OTHER POST GRADUATE COURSES —which may be selected in place of Radio Drafting — and also taught free—are as follows: Electrical Drafting Automobile Drafting Aeroplane Drafting Sheet Metal Drafting Machine Design Shop Mathematics Our regular Basic Courses are: Mechanical (Machine) Drafting; Architectural Drafting ; Topographic Drafting (Maps) Special and completeinstruction in lettering with all courses. GET YOU A JOB before our course is half com- pleted. Your ability to make ae from the start is assured y our thorough and prac- tical training. ROY C. CLAFLIN, President malColumbia School yy of Drafting Dept. F-14, Washington, D | Name | Po eee | cw ” Dept F-14, 14th and T Sts., N. W. WASHINGTON, D. C. > 5 pre wm Lee yh ph ghout : $200 monthly now, We help you secure a satisfactory position as soon as you are qualified as a Draftsman, which is frequently come scge see COLUMBIA SCHOOL OF «eg -c. Without obligation, please send me your interesting c log, showing opportunities in drafting, a free con ‘ student paper, THE COMPASS, and an enroll: Ww. L. SCHNEE, Los An- geles =. pret ting ». 6 weeks at $35 =) nachin This er Sndie deeses

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POPULAR MECHANICS ADVERTISING SECTION Tools=Not Books _ It’s known all over the world that E. J. Sweeney was one of the first men to take ambitious men and make automobile experts out of them. And if the Sweeney system had not been the one certain, right system, I couldn’t have stayed here in Kansas City so long, and built the finest auto school in the world, out of the measly little garage I started in. Here in my school yo. have $250,000 worth of equipment. You have all kinds o! cars and tractors to work on and experiment with. You learn every phase of the game— A to Izzard, step by step, under capable instructors. No makeshift equipment. No skimping, no cheap, counterfeit instruction NO! But the very best of everything money can buy. And special instruction that is Sweeney’s own. And I'll just leave it to your own good pagent whether or not the world-wide success of the Sweeney system, and the completeness of the Sweeney school, and the low cost of the Sweeney course, are things you can overlook if you really want to be the kind of an expert that can always demand the cream of this fast growing business. And I just want to get this one message over to you— you spend 2 cents, and send for my big book, and I'll show you that the Sweeney system 1s your one best bet. Station W. H. B. is right here in mys million dollar auto and tractor school — Kansas City, U. S. A. Cost me $50,000 to erect, and reaches any point in the country.} That’s one reason why the Sweeney School is known the world over—I never have grudged expense or any amount of hard work to provide my students with every single thing they need to step into the big pay jobs and their own business. THE FAMOUS SWEENEY SYSTEM No need for me to tell you about the wonderful opportunities for you in this fast growing field, with thousands of jobs open right now at pay ranging from $150 to $600 a month, and up. You know al that. And I reckon there’s just one thing you want to know right now. That’s this: Can Sweeney do for me what he says he can do? Can he train me in} 47 days to have a garage, vulcanizing shop, ti repair, battery station, etc., or one of the big pa jobs like the other 60,000 men he’s trained success- fully? And my answer is YES! I don’t know you of course, but I don’t have to know you. For 15 years here in Kansas City I’ve trained men with little education, no experience, no capital to speah of. And every one of these men is living proof that the famous Sweeney system is exactly what you need to step into success quick. LEARN A Wee SCHOOL OF AUTO 37-G SWEENEY BLOG.

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POPULAR MECHANICS ADVERTISING SECTION A n my ool —} 00 toll Intry. chooll havel hard§ every 1 big I guarantee to refund your railroad fare to and from your home to the Sweeney school if you do not find everything in my school exactly as represented in my book and letters. In putting this message straight across to YOU I want you to know that Sweeney means just what he says and the proof is a deal sight better than mere words any time. In my 15 years’ successful work I’ve never yet asked a man to take my school sight unseen and I never will. YOUR OWN BOSS? YES! Now, then, what about bein your own boss, and your own goc paying business? say you can, @ after been trained by the famous Sweeney system. Twenty thousand of my students have done it. I'll show you proof all over this country and other countries that Sweeney trained men do step right into shops of their own. If it hadn’t been for the Sweeney system they'd still be punching a time clock at $2.50 a day or less, Fare! To help you get started right in the Sweeney school I'll pay our railroad fare to Kansas City from any point in the United States. Come to my school and look it over thoroughly. And You Want? Demonstrator and Salesman $150 to $600 Garage Manager $150 to $400 WhatJobDo| or one of the white collar boys that are scratching like chickens in a barnyard for enough to pay their laundry bill. A part of the Sweeney System is the wonderful training you get so you'll know how to get started and run your own business. Tractor Engineer $10 a day Auto Electrician $225 Auto Mechanic $6 to $10 a day Chauffeurs $90 to $150 Truck Drivers $125 Tire Vulcanizers $100 to $200 $140 to $200 Battery Men $150 to $200 Let Experts Train You Right No matter what you want to learn, if it’s important to your future, you naturally want to choose the very best men possible to teach you. That’s just com- mon sense. And when I built up the Sweeney system I paid par- ticular attention to this one fea- ture. Cost me a lot more, of course, but the Sweeney school houses the best automobile trac- ition and radio instructors to be found anywhere. They me for every step of your training. They know that rjobisn’t finished until every student is ready credit to the LIFE SCHOLARSHIP that 000 Sweeney trained men are so proud of. Welders TRACTOR-AVIATION KANSAS CITY.MO then if you don’t find it just what I represent in my book and letters, I'll pay your fare home again. Is that fair enough? Doesn't it give you an idea that the Sweeney system must be the best anywhere if I can afford to make such an offer? FREE BOOK] AND SPECIAL OFFERg I’ve told you all I can in this small space. Now, you take the first step. That is to send right now for my 64-page, beautifully illustrated book that tells you everything Then you decide. I'll tell you of my FREE RADIO COURSE, and a special tuition offer I’m making for a short time. I'll show you how men come to my school from all over the world, and step out into the big pay jobs and their own business, just like you can do. Send in the coupon right now Ww gs oe es o or e o* a ~ . re) ss \ oo % oe A oe 4 ov ‘¥ 4 y

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POPULAR MECHANICS Get Bigger Pay—Travel—See The Country —No Lay-Offs—Life Job—Pension— Free Railroad Fare Fit yourself for a life of travel and excitement. Just think of riding in your own private car. Imagine going on a vacation with full pay, with free railroad fare. Think of it. A permanent job with big pay, fascinating work, free transportation, expenses while traveling, and a comfortable pension in your old age. Get into this, the greatest industry on earth, some- thing new all the time. Get into railroading. EARN $3,000 TO $6,000 OR MORE A YEAR Blame yourself. It’s your own fault if you don’t earn more. I guide you, step by step, to fit you for one of thousands of jobs on our big railroads paying from $2,000 to $6,000 per year. There are not enough able men to supply the demand. Our great American railroads need men who have the training to handle the important problems which must be worked out prac- tically and accurately. It is possible to make $60,000 per year. The greatest men in railroading were self trained. C. H. Markham, President of the Illinois Central Railroad, Daniel Willard, President of the Baltimore & Ohio Railroad, and scores of other presidents and big executives began with no more knowledge of railroading than you have today. And there are many others. What others have done, you can do, START TO LEARN AT HOME IN YOUR SPARE TIME Don't let any doubt about your being able to qualify stand in your way. Can you read and write? Are you ambitious? Those are the requirements. Learn at home in spare time, by new method, posi- tively fascinating Experts who have spent their lives on our great ral helped me create this easy, self training course. I coach you personally, and then I help you get a job. POSITIONS GUARANTEED-- Or Money Refunded I Gon’t stop with simply training you. I give the most binding guarantee of an actual job ever offered. You prepare for this fascinating work in your spare time at home. I will guarantee to give you all your money back if you do not have an opportunity pre- sented to you to enter railroad service during or after finishing oe GET OUR SPECIAL OFFER Get the vital facts. Let me tell you more about the big demand tor trained railroad men. ACT NOW I have room for just a few more students under our present plan. Full details of this special offer, which will be withdrawn as soon as classes are full, will be given by return mail. Investigate—Mail the Coupon RAILWAY EDUCATIONAL DIRECTOR 9 South Clinton Street, CHICAGO, ILLINOIS was? usti - COUPON Please send full details of reduced price offer on self training course for the greatest industry on earth. ADVERTISING SECTION Earn $60.50 a Week Good Piumbers at Big Pay are in de- mand! There are not enough apprentices being trained annually to fill the needs of the trade. No need of serving 4 years apprenticeship— Kansas City School of Plumbing! Learn all branches of the trade quickly—under real plumbers. Learn it right! Step into a big pay job or start a plumbing shop of your own. Get Ahead! Write at once for full infor- mation, low tuition fees, opportunities offered,etc. Send a postcard KANSAS CITY SCHOOL OF PLUMBING = 1716 BaltimoreAve., KansasCity,Mo.{/) | Great Demand for Practical-Technical Men. Big Salarie Wonderful Opportunities. Beautiful New Building. Extensive Laboratory and Shop Equipment. Not a trade school but a Practical-Technical College. Faculty of Trained Experts. 3 mo courses in Practical Electricity and Steam. 1, 2 and3 y courses in Mechanical and Electrical Engineering. Ar tural, Structural, Mechanical Drafting. Day and Degrees awarded. 22nd year. Write for catalog D. FINLAY ENGINEERING COLLEGE, Kansas City, Mo. nerve Intensive feeding, no water. Substitute freely juices. SOLVENT BLOOD dissolves tumors, blood clots, lime in joints (enabling use of limbs again) also eliminates catarrhal matter from nose, ears, tonsils, bronchials. etc. Eating nerve or muscle food TO SUIT OCCUPATION prevents fi of WASTE in blood (the basis of every disease). Demineralized, denatured, disproportioned foods cause disease, from which wild ani- mais are free. Educational booklet 10 cents. Sworn re- sults. Over 6,000 pupils. BRINKLER SCHOOL OF EATING Dept. 42-G 131 W. 72d Street, New York. a MER? or STUTTER It ruins many chances for promotion. “ Send postage for large free book *“The Correction of Stammering and Stuttering.” Methods successful for over a quarter-century. THE LEWIS INSTITUTE 33 Lewis Bldg., 77 Adelaide St., Detroit, Mich., U.S.A LEARN TO PITCH Lessons by “MATTY,” WALSH, WHIT! JOHNSON, RUCKER, WOOD — PITCH THE FADE-A-WAY, SPITTER, LER, SMOKE BALL, etc., clear) and illustrated by 56 Pictures tire COURSE OF LESSONS sent p.p. for 25¢, J.C. DORN, 721S. DearbornSt.,Dept.65, Chicago,Ill. PIMPLY-* madeWELL When a few applications of this wonder- working lotion has cleared faces of pimples, PRES blackheads, acne eruptions on /"4 nO, the face or body, barbers itch, Pp eczema, enlarged pores, oily ‘~ { 7 or shiny skin, you can realize why / CLEAR-TONE has been tested and C. approved in over 100,000 Test Cases. ; The simplicity of the treatment, and The ¥/ /7 Story of How I Cured Myself are all ex- / 4 plained in my free booklet, “A Clear- / Tone Skin.” Write for your copy tq. / , day and learn of the results gotten by \\ thousands of men and women. afford to E.S.GIVENS, 128 Chemical Bldg., Kansas City, Mo.

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STE in tured, id ani- rn re ATING York. POPULAR MECHANICS ADVERTISING SECTION AEE Trained Men Make Good in Business For Them:. elves AEE Trained Men| 3 Electric Experts ASSOCIATED ELECT ELECTRICAL ENGINEERS has AMERICA = 537 South Dearborn St. Chicago -- - Wl.

ee Hundreds of millions are being spent for electrical development. You see it all around you. New power plants! New electrical equipment for the home! New electric machin- ery and railways! More Radios! More automobiles! No other in- dustry is growing so fast. That's why the electrical field opens for you such good opportunities—and pays so well for electrica] experts. Electricity needs you. You Can’t Down These Facts The bare facts show a startling shortage of trained electrical experts that can’t be overcome for five years at least. Get this, men—there is a real chance for you in the pay electrical fie it can’t be done, Now you can become an ELECTRICAL EXPERT At last you have a chance to get the — 4 of electrical training that makes real ex- Associated Electrical Engineers of y rate have thrown open their doors to you, and — train you at home—quickly and prac- tically. The Greatest Electrical Home Training Method Ever Developed usive copy- The A. E. E. method is an exc righted method of home training that surpasses anything of the kind ever offered; developed by a group of men who have trained thousands for electrice! success, it teaches you the big important things you need on the job. $3,000 to *10,000 a Year On the Job Pioctsicity paying , a week or in Business right now to an army of trained electrical ex- for Yourself perts. Thousands of others are starting Electrica] Contracting, Sup- ply, Radio, or Automotive Electrical Business on a shoestring’’ and becoming wealthy. You can do it too! Working for someone else, orin business for yourself, .his ia your opportunity Don’t Let Lack of Experience or Education Stop YOU The A.E.E. training method is so ~ clear and sensible that all you_need is education enough to read spleme English. eS <i —— my bee Se ns ities opportun field. Don't let anyone tell you different. Don’t say t the facts. Send for our big FREE Book; then judge for yourself. A. E. E. Training is COMPLETE You get practical, clear, understandable information on every branch of electricity— General, Automotive, Radio; and Com- plete Electrical Business Training Free! LABORATORY Outfit FREE You learn by doing; we supply you with a wonderful FREE working outfit of tools and electrical appliances, so that you can break in- to the money-ge tting class quickly. Legal Guarantee of Satisfaction You don’t risk a cent with the A.E.E. A legally binding guarantee of satisfac tion | pro- you comes your money if you are sfied Now~—Mail the Coupon and get your copy or our big FREE book on Electrical Opportunities, with the facts that prove every word we say. fa nok. fs 1 Address--"°"

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POPULAR MECHANICS ADVERTISING SECTION you never had a chance! “Four years ago you and J worked at the same bench. I realized that to get ahead I needed special training, and decided to let the International Correspondence Shools help me. I wanted you to do the same, but you said, ‘Aw, forget it!’ You had the same chance I had, but you turned it down. No, Jim, you can’t expect more money un.:il you’ ve trained yourself to handle bigger work.” There are lots of “Jims” in the world—in stores, factories, offices, everywhere. Are you one of them? Wake up! Every time you see an I. C. S. coupon your chance is staring you in the face. Don’t turn it down. Right now more than 180,000 men and women are preparing themselves for bigger jobs and better pay through I. C. S. courses. You can join them and get in line for promotion. Mark and mail this coupon, and find out how. INTERNATIONAL CORRESPONDENCE SCHOOLS Box 5609-D, Scranton, Penna. Without cost or obligation, please tell me how I can qualify for the position or in the subject before which I have marked an X: BUSINESS TRAINING COURSES Industrial Management Personnel Organization Traffic Management Business Law Banking and Banking Law Heron ead P.A.) Nicholson Cost Accounting Bookkeeping ha Secretary CSpanish (J French A Business Management Salesmanship Advertising Better Letters Show Card Lettering Stenography and Typing Business English Civil Service Railway Mail Clerk Common Schoo) Subjects High School Subjects Illustrating (0) Cartooning OooooooooooD TECHNICAL AND INDUSTRIAL COURSES C) Electrical Engineering Electric Lighting Mechanical Engineer C) Mechanical Draftsman {} Machine Shop Practice Railroad Positions Gas Engine Operating Civil Engineer Surveying and Mapping Metallurgy Steam Engineering Radio Architect Architects’ Blue Prints Contractor and Builder Architectural Draftsman Concrete Builder Structural Engineer Chemistry () Pharmacy Automobile Work Airplane Engines Navigation Agriculture and Poultry Mathematics Name..... Street Address City Occupation Persons residing in Canada should send this coupon to the Interne- tional Correspondence Schools Canadian, Limited, Montreal, Canada No Previous Musical K Prof. Barker’s method is so simple and JAZZ easy that you apchly pins | any and all 1 played in dance or orchestra, on the stage—everywhere. JAZZ NEW ORCHESTRA STYLE Just Mail a Post Card for Details of our remarkable FREE Tenor Ba: --BUT DO IT TO First Ronstientinnnensial Necessary--Quich--Ency--Pesttine of the popular dance hits just as you have heard them NEW EASY WAY-—FUN GALORE Offer--simply wri ry _ am inter of Music, Inc. Specialcourses under Jamous teachers: Hawaiian Guitar Violin - - Ukulele Instrument Free — Send for This Booklet Jimmy De Forest, trainer and conditioner of } Dempsey, Longboat, Firpo, Roosevelt, bE ibert mn bard and others, has written a boc kiet “Physical Fitness and the Pay Envelope.” | ver man who believes in keeping physically fit should have a copy. Send 1c to cover cost of postage and mailing The man who commands the big salary is physically fit. Jimmy De Forest Physical Training System 347 Madison Ave. . 17, New York eapest Way to Go Cc to work or school and recreation isonaRanger iy bicycle. You can have your socten. of 44 colors and sizes. 30 DAYS FREE TRIAL. Express id. Monthy fee, Saved tn } $21.60 up. 5a f desired time and carfare a ~f —— 2S the ones monthiy pay- + a often advan fc factory prices id ” ac expres “ Tinie wheels and equipmen prices. end do business Sirece eamany |= GOVT. HELP NEEDED All men, women, boys, girls, 17 to 65, willing to accept ‘ ment Positions, $117-$250, stationary, at or near home, or ling, write Mr. Ozment, 111 St. Louis, Mo., imm pEAR ce JEWELRY REPAIRING BY OUR . OFIT-SHARING PLAN ouR “GRADUATES SUCCEED One of our Iowa students started ‘n a very mall way ing over $30,000 a year. Another in Wiscon au st year. Day or night classes. Call or a _~ ‘FRI CHICAGO SCHOOL OF WATCHMAKING Dept. 20 4844 Lincoln Avenue, _— mee for — ~ 2 my and Seco easy payment terms AH, Small Cost, Spare Time, Easy Lesso . - : Free Book, “How to Become an —_* 'Pe It contains specimens and tells + bows expert writers by the Tevis Method. Y be written on a card if you enclose stam T. M. TEVIS, Box 25K, Chillicothe, Mo.

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Klet of Jack Hut Physical Write ert Pen- POPULAR MECHANICS ADVERTISING SECTION This Automobile Manikin FREE! You can’t buy this manikin.. It is not for sale at mf na But you get it free with Dyke’s Automobile and Gas Ei Encyclopedia. This Manikin and Encyclopedia give you as prac- tical and complete course of instruction on the automobile, just like having a real car and an expert at your elbow to explain everything. The Manikin, which is worth $5.00 to any man who owns a car or who wants to become an auto- mobile expert, will be furnished for a limited time exclusively to buyers of the Encyclopedia without a penny of extra charge. Here is a complete model of a modern high-powered touring car. You take it apart piece by piece. Every part is there—every part named, numbered and indexed. Even the inside of the wheel bearings, every part of the motor and every other part shown in exact and minute detail. So simple, yet so complete that operation and construction are under- stood instantly, Developed by years of practical experience in automobile design and construction. Noth- ing else like it. Send while the offer lasts. Put it into the mail today. Read special offer below and mail the coupon. Dyke’s awa: tue Encyclopedia Will Make You an Automobile Expert! 16,000 Topics | 1236 pages of useful information | andinstruction, 4143 illustrations anddiagrams, Seventy-three pages for the index alone. Every type and styleof carcompletely analyzed and demonstrated. Pleasure cars, commercial cars, trucks, tractors, motorcycles—steam cars, gas cars, —you are shown all about them. Every featurecovered clearly, com- pletely. ae possible car trouble explained and the way to correct it given. You can’t ask any ques- tion about the automobile that is not clearly, completely answered. Used by U. S. Govern- ment and Auto Schools So valuable is Dyke’s Encyclopedia that during the war the govern- ment furnished it to every man in the transport service. It is used as & reference book in 45,000 garages and repair shops and is a text book in practically all automobile schools. 13 big editions already required to supply the demand. Earn $100 a Week or More Expert repair men, expert assemblers and garage executives are in big demand. There are more good jobs than men to fill them— and they pay big money. Don’t stay in a job without a future when this opportunity to get an expert training in spare time is offered. If you are a car owner, you also need this great Encyclopedia for the saving in time and money you can make by cutting out repair bills. One adjustment, one repair job done yourself saves more than the cost of the book. In your leisure hours you can gather from this encyclopedia the latest, most authoritative knowledge of the automobile— a can become an Expert. poe cums cums aes ee ee oe Even if you paid $500, you could not get 1 Goodheart-Willcox Company more complete information. 2009 South Michigs cago, lil. + | Send Dyke’s neyelopedia in blading n i enny and at price marked X below, and wit y, it the Free Manikin. loth, $6.00. Send for this Encyclopedia now and = 3 Cc with it FREE the wonderful Automobile / suas 0 Limp “American meg $7. —_ Manikin. Pay postman on arrival $6.00 will pay postman the price, plus few cen s Se ” . rst upon delivery, it being understood that for cloth binding, $7.50 for —— it not satisfied i may retara the k and manikin ag’ wey a / within 10 days and you will refund my money. oughly. en if not convince it is worth far more than the me f chase price, send it back within / Name 10 days and your money will we / returned. Mail coupon now. n Avenue GOODHEART-WILLCOX COMPANY / 2009 South Michigan Avenue, Chicago, Illinois /to~>

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POPULAR MECHANICS ADVERTISING SECTION Who WOAVAT cea | LEARN TO PLAY ANY Folio all INSTRUMENT In Few Mon’ 7 avin can lea Fiano Mandolin . ® tua Organ Drums and tions instead of tiresome exer ee Violin Tiaps endless hours of practice. A new s - —. Greeny and method of teaching reduces all music t s lari ompaosition plest possible form. We teach you 4 — }~ dae own home by note. No n imbers or Cornet Piccolo stuff. So simple that young and old f Cello Trombone easy to play with amazing skill. A Secret Service Operator 38 is on the job Sent ee | mysteries of mune clmineted. T have learned this splendid quit k way Automatic Finger Control everyone and become popular, Pp ractica OLLOW him through all the excitement of his chase night, with your new accompli of _ ogee pene. See how the lax oe 4 works. elitale finger prints on the lamp stand in FREE BOOK d ill d the murdered girl’s room! The operator’s cigarette case an ustrate older is handled by the unsuspecting gangster, and a great offers this wonderful musical opportunity. Send for them today. } mystery is solved. Better than fiction. It’s true, every be astounded, thrilled, fascinated. at this easy, rapid way t word of it. Noobligation. Just send the coupon and get veritable master of your favorite instrument. Name the instrur are particularly interested in. Special reduced price if you wr The Confidential Reports No. 38 Made to His Chief HEN our VACUUM (AP And the best part of it all isthis. It may open your eyes ih. W ie used few minutes to the great future for YOU asa highly paid Finger Print 4 ] ttt Le. or the | Expert. More men are needed right now. This school a dent cel omm enatetied has taken men just like you and trained them for high > _— Vacuum Cap is an at official positions. This is the kind of work you would S that draws the blood to the like. Days full of excitement. Big salaries. Rewards. Roots and starts a new he crop of hair. It stops Dar stops the hair from falli: Can you meet t 7 test? Bought by Doctors and men who know that it is th tpaspactre ALS Gay ne ha known to science. No lrnes Can you read and write? Are you ambitious? Would you oe rite for application, blank, testimonials. and b ° velop REF give 30 minutes a day of your spare time preparing your- coklet on “ HAIR,” sent sealed in plain envelope, FI ment, thrilling adventures and high pay? Answer “yes THE MODERN VACUUM CAP CO. and I’ll show you how to attain all this. W 559 BARCLAY, DENVER, COLO Send the coupon and I'll send the Free Reports— also a wonderful illustrated book ane of the future awaiting you as a Finger Print Expert — T. G. COOKE, Pres. ee New Invention UNIVERSITY OF APPLIED SCIENCE i " For Seekers of Health—Power—Beauty 1920 Sunnyside Ave., Dept. A-135 Chicago, Iil. Generate ttigh Prequeney Vietes Roy. Cochantost '¥ est curative ents, Combined or separat« They erate on the e ry Hant py yy “ot te . 7 motive power at less an e University of Applied Science Sat WRITE Ask fort the book on these ir 7 5 whic vs oe epare 1920 Sunnyside Ave., Dept. A-135. Chicago, Ill. be sent to you without cost, Re-vitalize Gentlemen: — Without any obligation whatever, send me the 4 re sae Secs coctey eoed 1. A195, Chicags Reports of Operator No. 38, also your illustrated Free Book on LINDSTROM & CO., 442-446 WN. Wells St., Dep Chicar _ er Prints and your offer of a FREE course in Secret Serv- — ntelligence and the Free Professional Finger Print Outfit. Name —Every Deaf Person Knows That I make myself hear, after being deaf for 25 with my Artificial Ear Drums. I wear th and night. They are perfectly comforta! . one sees them. They stop head-noises. W' and I will tell you a true story, how I beca: and how I make you hear. Address GEO. P. WAY, Artificial Ear Drum Co. (Inc.) 80 Hoffman Bldg., 2539 Woodward Ave., Detroit, Micb.

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POPULAR MECHANICS ADVERTISING SECTION Big Money The Rest : Hundreds of Our Graduates Own Their Own Business rr -_ This Summer and Fall there will be hundreds of Automobile Jobs — paying $35 to $100 per week — still open for properly trained men. Sixteen Million Autos now in the U. S. to work on. If you want one of these jobs write uur—RIGHT NOW—for Special SUMMER TRAINING OFFER that you can afford—but cannot afford to overlook! We pay Railroad Fare to Chicago—and GUARANTEE Jobs While Learning and After You Graduate. Only a limited number of men can be accommo- dated on this offer. Mail the Coupon NOW for full information and first consideration. Eight Weeks Will Put You On Your Feet nd It takes only 8 weeks to complete training in our day class. Special Summer Course includes Machine Shop Practice — Shop Mail Coupon for this FREE BOOK Management—Selling—Truck, Tractor and Auto Repairing— Lighting—Starting—V ulcanizing—Storage Batteries—Driving— everything in automobile mechanics. Learn all about it—MAIL THE COUPON =F” ERWIN _’ GREER ¥ President / 2024 S. Wabash No obligation on your part Benin ged uty Ps CHICAGO, ILL. , Please send me FREE 4 BOOK, “How To Succeed Pa in the Avtomobile Busi- = = , ness,” and full information — = , on Special Summer Training Course. ¢ t | of Automotive Engineering _, pi air / tl ROE OS Peat ——— ’ 2024 So. Wabash Avenue _” ¥~ Dept. 6J Ps Address. ... / CHICAGO, ILL.” . Inc.)

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74 Earn*100 a Week $50 to $300 a week for fascinating easy work—wonderful future, Hundreds of big paying positions in this huge new industry! a fl | ill Ly se ohh ii va ( Mra \ ee Mére Money for YOUin Radio HOUSANDS of Radio Experts are needed to design, maintain, sell radio apparatus, to operate broadc asting sta- tions, as ship and land operators, to go into business; to in- struct, demonstrate, superintend and for scores of other big’ paying radio jobs And now, you can easily become a Radio Expert. Studying at home in spare time, you can quickly qualify for a splendid Radio position. Astonishingly small cost. Famous radio instructors give you individual help by mail. Training GUARANTEED. We Help You to Bi¢g- pp he Fa sted Hardly a week goes by without our rec eiving urgent calls for our graduates. “‘We need a competent Radio Engineer” Ve want men with executive ability in addition to radio knowledge to become our local managers’’—** We require the services of several resident demonstrators ’’—these are just a few small indications of the great variety of opportunities open to our graduates. FREE—Receiving and Special Parts Our course of practical instruction includes not only several of our own special patented instruments, but in addition w: furn sh material and diagrams for building receiving sets, and fla lly this complete receiving set—all without additional cost. Free Employment Service Scores of young men who have taken our course are already earn- ing from $75 to over $200 a week. Merle Wetzel of Chicago Heighis, lj repair,

Ill., advanced from lineman to Radio Engineer, increasing his salary 100% even while taking our course! Emmett Welsh, right after finishing his training started earning $300 a month and expenses. Another graduate is now an operator of a broadcasting station PWX of Havana, Cuba, and earns $250 a month. Still another graduate only 16 years old is averaging $70 a week in a radio store, and we help our graduates to positions like these Send for FREE BOOK There's more money for YOU in Radio. has meant to hundreds of our graduates—and how you too can profit init. “Rich Rewards in Radio"’ has just been printed. It is filled with the latest Radio facts, figures and illustrations of tremen- dous interest to you. Right now—if you are at all ambitious—send for this valuable free book. Fill out the coupon—and mail it now! NATIONAL RADIO INSTITUTE Dept. 15FA WASHINGTON, D. C. Cc. _—_—— an amr eee ees oe CS - National R Radio Egecteute, Dept. 15FA Washington, D. Without Sosa send me your book “ Rich Rewards in Radio,” which tells all about the opportunities in Radio, how spare time study at home will qualify me quickly as a Certified Radiotrician so I can get one of these splendid positions, and how your Employment Service helps me to secure a big pay job. Find out what this field Pc ececevecivaceseccesne ee weewabesees nocecDscccedecens PNUD acct drdvenscenwecebadtves OCOCUPAtIOR. oc ccccececcscce CIty... cece. cones co esc ct ceccccc ceMiBecccccoeeeoewes d POPULAR MECHANICS

ADVERTISING SECTION

WE TRAI Youtobea RR , Le xpert { x RY Barbe New, EasyWa TO matter what

mu arel +‘ now doing, no matter how much you earn, our amazing new em of training for the barbering profession enables you step nto this clean, pleasant £ ble business in a few short week t

right in earning $50 to $150 a week . McGregor,of New Orieans, writes: F.. Erbst, of Chicago writes: job ‘l own my ow I have my own aut I ‘have never been out of a

geen xen sent me to the one from the raduate departme

have pam hye ved 4 6 -" independent * e accoun made it all sinc aduat om sled J I learned Modern Barbering =—_ , your schoo fi ve a EARN $50 TO $150 “EACH WEEK Easy Work A trade that enables you to tra Always Busy see the world—one that pays in tipsand commissions in addition to salaries BIG PAY Moler System graduates are in great d mand and have no trouble in securing good jobs WRITE FOR FREE BOOKLET Our catalog that we mail free tells how we enable you to earn while learning, how we put you into the best city jobs, how we equip y al shop on e aay payments. In fact, how we take you just « ou are, make your life's work easier, better Paying and more fr lent. We have 33 branch schools in leading cities. e have one near you THE MOLER ovevem OF eots.sers 157 Third Ave., New York, N.Y 110 8. 14th St., Omaha, Nebr 105 8. on. st., C picago, Til. 6138 E. Water St. Mi ~ aukee, Wis 810 N. 6th St., St. 1 » He. 1005 Canal St., New Or I 544 Main St a ity N. Forsyth S + sae = TI 206 E. 4t . Cincinnati, ‘Ohio + Forsyth St., Atlanta, Ga 215 Huron Rd., Cleveland, Ohio = 80 N. 2nd St., Memphis Tenr 1045 Cass Ave., Detroit it, Mich. 910 Main St., Dallas, Texas a | 1229 17th St., Benver, Co 712 Franklin Ave., Houston,Tex qe St., San Antonio, Texas

$ 2 0 ae... We have a wonderful new copyrighted system of teaching music by mail! To first pupils in each locality we will ¢ Tree

pn superb Violin, Tenor Banjo, Ukulele, Hawatian-Guitar, Ba ; dolin, Banjo-Ukulele, Banjo-Mandolin, Cornet or Banjo-Guitar ab “ B Also teach Piano and . Very small charge for lessons only will teach you several pieces. Over 100, 009 successful players. We gu cessor nocharge, Complete outfitfree. Writ ay, Dept SLINGERLAND SCHOOL OF MUSIC, 1815 Goctaad Street, CHICAGO, ILLINO Buchstein’s Fibre Li uchstein’s Fibre Limh : is soothing to your ~ oy ng, cool ‘ neat, light. Fasy pay: ’ races for ali deformi Sena D. BUCHSTEIN Co. . oC ene 610 3rd Ave., So., MINNEAPOLIS, MINN ST EMENT OF THE OWNERSHIP, MANAGEMENT, CARCI REQU IRED BY THE ACT OF CONGRESS OF AUGUST 24 . Mechanics Magazine aH. lished monthly at C < nd Ill., for Apr State of Iilinois, County of Cook, se t Before me, a peery public in ‘and for the state and county a appeared H sor, who having been duly eworn, according t a seys that he is the ‘editor and business manager of the P: pular Me ‘ ‘ and that the following ia, to the best of his knowledge and belief, a tr t ownership, management, etc., of the aforesaid publication tor the date » above caption, required by the Act of August 24, 1912, embodi« Laws and Regulations, printed on the reverse of this form. to wit: F names and addresses of the publisher, editor, managing editor are: Publisher, wept Mechanics Co., 200 East Ontario St ’ uf Windsor, East Ontario St., Chicago, Managi ng. K , 200 East Getarie St., Chicago, Ili, Business Manager ’ Hi. W East Ontario St., Chicago, lil. Second. That the owners are dresses of individual owners, or, if a corporation, give ite name 4 nd t addresses of stockholders owning or holding 1 per cent or more of the tot atock!: H. Vindsor, cast Ontario, ., Chieago, Tll.; L. B. Winds Ontario St., Chicago, Il; H. H. Windsor, 200 East Ontaric St., Chicae Trust and Savings Bank, Trustee for H. "i Windsor, Jr., Chicago, Ti the known bondholders, mortgagees, and other security holders owning per cent or more of total amount of bonds, mortgages or other secur! are none so state): fone. Fourth. That the two paragraphs next above. € names of the owners, stockholders and security holders, if any, contain list of stockholders and security holders as they appear upon the books of the but also, in cases where the stockholder or security holder appears

the company as trustee or in any other fiduciary yotation the name o e pe corporation for whom such trustee is acting, is gre ; ,aleo that the enid tw graphs contain statements embracing affiant’s full knowledge and belief s# cumstances and conditions under which stockholders and security bolders appear upon the books of the company as trustees, hold stock and securities in © other than that of a bona fide owner: and this affiant has no reason to believe other person, associ;tion, or corporation has any interest direct or indirect stock, bonds or other securities than as so stated by him. H.H. WIN _ R Sworn to and subscribed before me, this 28th day of March, isn Notary Public. (My commission expires June 17, 1924.)

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Weeks ™ va | reas Become an Expert Accountant pert The profession that pays big incomes rhe N atl GO, ILLINO Limb rong, cool payment formitie IN CO. POLIS, MINA ‘ ‘ k if K a“ «i o civing ¢ pany ke or are cite not There will always be a demand forwell trained accountants—men whose training combines a knowledge of Auditing, Cost Accounting, Business Law, Organization, Management and Finance. Few professions offer better opportunities to men of ambition and intelligence. The tremendous business growth of this country has created a rich field for the expert. Train at Home Under the LaSalle Problem Method The LaSalle Problem Method will train you by mail under the direct supervision of William B. Castenholz, A. M., C. P. A., former Comp- ller and instructor, University of Illinois, member of American Institute of Accountants, and a director of the National Association of Cost Accountants. He is assisted by a staff of 75 instructors—legal staff, organization and management specialists; business efficiency engineers, including 31 C. P. A’s. You will be given whatever training, instruction or review on the subject of bookkeeping you may per- sonally need—and without any extra expense to you. Our big free book on the accountancy fession fully explains how we train you from e ground up, according to your individual eds, from the simplest bookkeeping princi- ples to the most advanced accounting prob- lems. All text material supplied in the course las been especially prepared in clear, easy-to- inderstand language, so that you can readily master the principles by home study. Get our free book, which fully describes our | expert training course and tells all about our | (©.P.A. examinations, state regulations, salaries | and incomes, and how you can qualify for a | high-grade accounting position without inter- Sa ference with your present position. Send the coupon — NOW. r —— aoe ee JVOUTRY COUPON — — — — LASALLE EXTENSION UNIVERSITY The Largest Business Training Institution in the Worid Dept. 664-HR Chicago, Ill. Please send me your book, ‘* Accountancy, / the Profession That Pays,”’’ and full in- formation regarding the course and service. Also a copy of your book, **Ten Years’ Promotion in One,’’ all without obligation to me. 0) Higher Accountancy Training for pote as Auditor, Comptroller, Certified Public Ac- countant, Cost Accountant, etc. Other LaSalle Training Courses LaSalle is the ~y “7 business training institution in the world. It offers training for every important business need. If more in- terested in any of these courses, check here: O Business Management Banking and Finance O Modern Salesmanship Modern Foremans! Oo Raltway »tation and Production Methods Management and Emp ersonne Oo o oO} O Law—D: gree of LL. B. ment Management O Commercial Law fey as eee O Traffic Management 0 — on — Kee ing O Industrial Management VU PUSINeSS English Efficiency 0 Commercial Spanish O Modern Business Corre- O Effective Speaking spondence and Practice OC. P. A. Coaching Zz 2 3 ® Present Pesities, ccscescsssescssnssssscesascccecscecesesesscce fl — |

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POPULAR MECHANICS ADVERTISING SECTION ELECTRICIT Earn'3500 to10000a year as an Electrical Expert What’s Your Future? — Gy Now you earn $20 or $30 or $40 a week. Inthe i. “4 yen : ¥ ® o same six daysasan Electrical Expert you can make ee $70 to $200 and make it easier—not work half so Vg Wy yi hard. Why, then, remaininthesmall-pay game, in We r a line of work that offers no chance, no aoe big promotion, no big income? . oa Fit yourself for a “ bossing’”’ bs | Buc job— e: Gog } UY | 4 Be An Vee ! J iia Bp pA “Electrical F = hii Ly 7 \ ee y y GOOG 3 YM YIM fff xpe rt! My tairun ee ea OA ot” Today even ordinary Electricians driver’? kind—are making n money. But it’s the trained 1 man who knows the whys fores of Electricity —t! cal Expert,”— who i “boss” the ordinary I —to boss the Big jobs that pay $10,000 a yi Auto Electricity FREE andRadio Courses If you want to specialize in Automo- bile or Radio work I will give youa special course on either or both sub- jects Free when you enroll for my regular Electrical Course. These are not makeshift lessons but regular $40 and $50 Complete Courses. This part of my offer may be withdrawn without notice. <==

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POPULAR MECHANICS ADVERTISING SECTION NEEDS YOU! Iwill train you at home rt] to fill a Big Pay Job $3,500 to $10,000 a Year Get in line for one of these “ Big-Pay 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 Draw-Back You don’t have to be a High School graduate—it isn’t even necessary that you should have finished the grades. As Chief Engineer of the Chi- cago Engineering Works, I know exactly the kind of training you need, and I will give you that training. My course in Electricity is the most simple, thorough, successful and practical in existence, and offers every man, regard- less of age, education, or previous experience, the chance to become in a few short months, an “‘ Electrical Expert,” able to make from $70 to $200 a week. | Earn While You Learn With me you do practical work—at once. In my first few lessons I show you how to make money doing Electrical work in your spare time. (Over half of my students are paying for their course in this way.) I show you also, how to get started in business for yourself, and then help you to get started. FREE—Electrical Working Outfit—FREE To do spare time work you'll need tools, etc. These I give you—Free—a hole kit including measuring instruments, a real electric motor (no y),and other things — the greatest value ever given by any School. Your Satisfaction Guaranteed by a Million Dollar Institution tely guarantee to return every penny paid me in tuition if, when you ed my Course, you are not satisfied in every way with my instruc- ind back of me, in my guarantee, stands the Chicago Engineering i million dollar institution. Nothing Like “Cooke” Training Anywhere “Cooke” training is different because it’s the most iland most successful. It’s bést because it's ked up by the greatest Service to students ever known. It’s this Service, plus ‘“‘ Cooke " training, that makes the “Cooke” trained man the “Big Pay” maneverywhere. Become a “Cooke” Trained Man yourself, and earn $12 to $30 a day—$70 to $200 a week—$3500 to $10,000 a year. Investigate! Mail Coupon Get the Vital Facts. Let me send you free my big new book on The Future of Electricity. Let me tell you more about the big demand for “‘Cooke”’ trained . flectrical Experts. Sign and send me Coupon below. Z g P é LI L. COOKE, Chief Engineer ° . BZ icago Engineering Works, Dept. 1-A a a COOKE, Chief Engineer 2150 Lawrence Ave., Chicago, III. . . . ; Dear Sir:—Send at once the *‘ Vital Facts” Chicago Engineering Works, Inc. = a taining Sample Lessons, your Big Book, ar . Z particulars of your Free Outfit and Home Study 2150 Lawrence Avenue Course—all fully prepaid, without obligation on my Dept. 1-A CHICAGO, ILL. part Name Address City and State..... Occupation

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POPULAR MECHANICS **There’s One Man We’re Going to Keep’ “Ed Wilson, the plant. He studies his International C every chance he gets. there, I notice “It’s been the making of him, as Tom Downey, nearly so long is one of the that he never fools orrespondence most ambitious too He who was laid off yesterday, but he knows ten times as much about this business “I’m going to give him Tom’s job at a raise in salary. the kind of man we want around here. H' )W do you stand in your shop or office? Wilson or a Tom Downey? No dence matter where you Schools will come circumstances tion, the simply-written, books make it easy to learn. This is all we ask: Without cost, self in you. any Way, live, to you. caps or how small your means, Are you going up? the No matter what your hs andi- we have a plan to meet you No matter how limited your pre —_ educa- wonderfully-illustrated I. S. INTERNATIONAL CORRESPONDENCE SCHOOLS Box 5611-D, Scranton, Penna. Without cost or obligation, please tell me how I can qualify for the position or in the subject before which I have marked an BUSINESS TRAINING COURSES Business Management Industrial Management Personnel Organization Traffic Management Business Law L)Banking and Banking Law LJ Accountancy (including C.P.A.) Nicholson Cost Accounting CJ Bookkeeping () Private Secretary Spanish (] French TECHNICAL AND O) Electrical Engineering Electric Lighting Mechanical Engineer Mechanical Draftsman tj Machine Shop Practice Railroad Positions Gas Engine Operating Civil Engineer Surveying and Mapping } Metallurgy L) Steam Engineering CRadio Name Street BEET cocesecencnnscceccevenscassssseseasecncese Occupation...... Persona residing in Canada should send this conpon t tional Correspondence Schools Canadian, Limited, )Salesmanship })Advertising | Better Letters [)Show Card Lettering | }Stenography and Typing _| Business English L)Civil Service |] Railway Mail Clerk [JCommon School Subjects High School Subjects Oilustrating OC artooning INDUSTRIAL COURSES Architect Architects’ Blue Prints _j Contractor and Builder Architectural Draftsman Concrete Builder Structural Engineer Chemistry [() Pharmacy Automobile Work Airplane Engines Navigation Agriculture and Poultry Mathematics OO0000000o the Interna- Montreal, Canada. men in away his spare time Schools Course hasn’t been here He's Are you an Ed Or down? International Correspon- text- without obligating your- put it up to us to prove how we can help Just mark and mail this coupon ADVERTISING SECTION Make °§QQQ avear Why work for slave wages? Here’s the quick way to Big Pay Just loan me an hour a da Spare time for a few ad a7 guarantee to put you in the $1 4 week class as an Auto Exp: rt, quicker than you can learn any other big pay work Don’t quit your job—stay home! Tho 18andg of men, no better than yo are making big money. Norman Rot ne s80n jumped from $20 to * 100a week in G months. F. A Sheets is now foreman of Big Auto Shops. ou, too, can boss the job. I'll show you how. pou ee} ob-Way’” earn Auto Repairing— Automotive Expert Auto Electricit Battery —~ 3,000 to $8.000 Welding Valeo” LEARN AT HOME! Learn in your spare time. My qupyrighted . *Job-Way”’ system teaches ou in an hour what ordinarily takes a month to learn. Fascinat ng ar sad interesting work Intensely practical. “‘Job-Way”’ syste m make jou a specialist in every branch of automotive work. 15,000,000 autos 000 trucks need repairing and overhauling. Opportunities everywhere. FRE Write Today for Free Book and Free Lessons Get this big illustrated free book. Shows the quick way to f Explains practical ‘‘Job-Way’’ method. Gives details of mons arantee. § free tools offer and other free features ow price and easy terms. Don’t pass up this ee. i rite today. is Free. No obligation. A postal R.BAYSTON, Chicago Automotive sig Pay y back 536 So.Clark Street Dept. A177 »Chicago By Note or Ear. With or without music. Short Course. A beginners taught ®y mail. No teacher required. Self struction Course fom Advanced Pianists. Learn f of Bass, 180 Syncopated Effects, Biue Harmon Or Chime, Movie and Cafe Jazz, Trick Endings Breaks, Space Fillers, Sax Slurs, Triple Bass, W mony, Blue Obligato, and 247 other Subjects, inc Pl: aying and Musical Invention 110 pages of I F 25,000 words. A Postal brings our FREE Speci Waterman Piano School, 259 Superba Theatre Bidg., Los Anasies. Cal. Tri-StateCollege of Engineering Makes you a Civil, Mechanical, Electrical or Chemical Er years. 48 weeks eac h Noentrance examinations. High schoo! required. Compact courses made up of essentials only. ! For catalog address, Box M-6, Angels, ind, i TEACH ry) SO} UM ee BY MAIL Mp eo won —t World’s First Prize in Penmanship. By my new system many are becoming expert penmen. Am plac- ing my students as instructors in commercial colleges. If - vou wish to become a better penman, write me. I will se nd you FREE one‘*o) my Favorite Pens and a copy of th« ) Ransomerian Journal. C.W. Ransom, 352K. C.LifeBide. ,RansasCity, Me. oF Dept. K181, Rochester, N.Y WwW A a | T E D! ! Sirs: Send me, withou ares $1600 TO $2300 r : ai) peornen, alia! (2) nchedule showing places of U. me A YEAR & examinations; (3) list « jobs now obtainable. (Men Travel—See Your © . Country e MEN—BOYS Py BORGES... ccccccceceooerooccoocss 18 UP y

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POPULAR MECHANICS ADVERTISING SECTION 113

a More Than , a Ts \ 50,000 : | : Sd. || Now in Use | ~~ —_ BW ~ SS Ee eee

wages’ y of your Se enna .

eks I'if the $100 @ Expert, parn ar m’t quit housandg you, are in Robin »*100¢@ \. Sheets sig Auto i the job. Way” ring— ; # iin We oe ttery ~ ting. E! n teaches iting and akes you , x

nS ry where, Free 3sons

Makes Your CAR or S TRUCK Two-In-One (yy Power—The Ruckstell Axle is revolutionizing the performance of light cars and trucks. It has

solved the great automotive engineering | Move the lev- &} problem—combining Two Direct ler again and you > Opposites In One—POWER and lhave a speedy car SPEED. Simply move the lever and or truck for city driv- you go through the muddiest roads; : : climb stubborn hills on high gear; ing or delivery or level rs negotiate congested traffic. For ‘country highway driving. trucks it insures “getting Thousands of farmers and business there” and back quicker, with concerns everywhere say the Ruckstell agree: Gouble lene | Axle saves half time in getting to town and 1 eee | back home. Noiseless in operation. No cutting, power /no brazing, no welding—doesn’t change princi- ple of car or truck construction. your nearest dealer for FREE DEM- Se Seeeeeeeeaeeeeteaceeetaneuseeaee | Clip The Coupon—Take it to } ; ; r t< sas o . . ~ | ONSTRATION, or mail direct to our Kansas ! This coupon is good for Free Demonstra- | City office for Free Booklet, Prices, etc. ¢ .. | Ruckstell performance will surprise you. , tion of the Ruckstell Axle at nearest Dealer or for Free Booklet giving full particulars. (20a) _Ruckstell Sales & Mfg.Co. .” * Desk 20A Kansas City, Mo. : Name ......... atnaeatien | Berkeley,Calif.; Los Angeles, Denver, Buffalo. ¢ In Canada: Ruckstell Axle Co., Ltd., gf Address... Toronto and Montreal. e

d : ~ Make of car or truck j icitiehestaaiaiele . -

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Though written faithfully, his let- ters from home seemed to have had a way of arriving at his hotel in one city just after he had left for the next —and of never catching up. Three weeks passed—business con- ferences, long night journeyings on sleepers, more conferences—with all too little news from home. In his hotel room in Chicago he still seemed Then he turned eastward. a long way from that fireside in a New York suburb. He reached for the telephone—asked for his home number. The bell tinkled cheerfully. His POPULAR MECHANICS ADVERTISING The Road to Home SECTION wife’s voice greeted him. Its tone and inflection told him all was right with the world. She hardly needed to say, “Yes, they are well—dancing right here by the telephone. Father and mother came yesterday. Oh, we'll be glad to see you!” bt 2 & Across the breadth of a continent the telephone is ready to carry your greetings with all the conviction of the human voice. Used for social or business purposes, “long distance” does more than communicate. It projects you—thought, mood, personality—to the person to whom you talk. AMERICAN TELEPHONE AND TELEGRAPH COMPANY’ AND ASSOCIATED COMPANIES BELL SYSTEM One Policy, One System, Universal Service

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Dry POPULAR MECHANICS ADVERTISING SECTION olumbia Mi Mek a EAL mechanics won't fool with come-and-go ignition. Surest way to keep her hitting hard and steady is with Columbia Ignitors. Fiery sparks by the millions. As sturdy and sure as the ruggedest engine. For weather exposure, the water-proof steel cased Columbia Hot Shots. Four, five or six Co- atteries —they last longer for— Gas engine ignition Tractor ignition Starting Fords Doorbells Buzzers Ringing burglar alarms Protecting bank vaults Calling Pullman porters Running toys Motor boat ignition Telephone and telegraph Lighting tents and out- buildings Firing blasts Heat regulators Electric clocks Radio “‘A” Fahnestock Spring Clip Binding Posts on Columbia Ignitor at no extra cost to you |, Two-fisted, hard hitting ignition lumbia cellpower. Like all Co- lumbias, they recover strength while resting. Last so long you forget how long they've been in service. Columbia Dry Batteries are sold by electrical, hardware, radio and auto accessory shops, marine supply dealers, implement dealers, garages, general stores. Insist on Columbias. NATIONAL CARBON COMPANY, INc., New York, San Francisco Canadian National Carbon Co., Limited Factory and Offices: Toronto, Ontario

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116 POPULAR MECHANICS ADVERTISING SECTION ‘tp AND FAMOUS 2] JEWELED ILLINOIS RAILROAD WATCH» 2 Sis BUNN SPECIAL You can ask any railroad man in the U.S. about the Bunn Special watch, and even if he does not carry one himself, he will be able to tell you all about it, because it is nation- lf ally famous for extreme accuracy. This fame and reputa- Were ON S / tion was earned by years of faithful performance under — —_ PAY arduous service conditions. That’s what counts. Take your choice of plain Arabic dial or Montgom- ery dial, but insist on a watch with six adjustments. WILL PASS INSPECTION ON EVERY R.R.IN THE U.S. There are some watches called railroad watches that will pass inspection on a few railroads but this famous timepiece is guaranteed to pass the most severe inspection requirements on any or all railroads in the United States. Not only that—it will pass inspection with colors flying, at the head of the list. ; ) 3 GRAND © te oa "uly 9 an aa d 4

yy good, so use The price is ee up to $60 so order NOW! FREE TRIAL You can test the watch by carrying in your pocket on tria If it does not kee ‘Dp tin as guaranteed, you car return it, and we will ré turn your money.

“a i INN Es IE HU

*®

DESCRIPTION These watches are 16 size, in accordance with railroad rey ———— nts. They have 2 and sapphire jewels — le pollar escape- ment, % late model and are adjusted to 6 positions. They are built for stur- dy, reliable ser- vice, and have made good on every rail- road in the United States

- ~——g , PENNSYLVANIA — STATIO =

Railroad requirements for timekeeping accuracy aré most severe we know of and a watch good enough to pass railroad inspection is good enough for any man requiring at solute accuracy. These watches stand up under the hardest kind of use, because they are cased in heavy gold filled cases, guara teed to wear like solid gold for at least % ears. The movement guaranteed against any defect in material or workmanship. Yo can send an order for one with all confidence that you are recei\ the last word in watch timekeeping SERVICE and SATISFACT! YOU CAN WEAR IT 30 DAYS i “\ZEAR OFF AND MAIL~ JUST SEND YOUR NAME

Please send your big catalog WRITE FOR BIG CATALOG No. 1665 STERLING DIAMOND & WATCH CO. FOR THIS SIX POSITION R. R. WAtca 63 Park Row, Dept.1665 New York. That’s all—there’s no red tape or delay. Your credit is good, % Sign the coupon and mail it to us with only $2.00 to show your good f Gentlemen: P lease send the famous BUNN SPECIAL, 21 jewelled We'll send the watch to you promptly. After trying it 30 days, just | Illinois Wa s described above, to me on 30 days free trial. I $5.50 monthly for ten months until $57.50 is paid. Montgomery Dia enclose $2.00 a posit to show my good faith. If | am not satisfied price. If you are not satisfied after 30 days trial, just return the v and return the watch within 30 days, you will return my money @f and we will return your money—every cent of it. You get our § keep the watch, ! will pay you $5.50 every month for ten guarantee as to service, accuracy and satisfaction You | take r months until the total price of $57.50 is paid. Title to this Order right away. Specify which dial you prefer—Arabic or Mont watch remains with you until I have paid you in full, Itis under- ery. Be sure to give your complete address and references if y stood that you fully guarantee this watch to be as described This catalog brings a big jewelry store right into your home. It YOUR thousands of wonderful bargains in perfect cut, blue white, NAME diamonds, men’s and ladies’ watches, and jewelry of all kinds save 40% by ordering -from this bargain book. Write for it at LOCAL ] STERLING DIAMOND STATE , = AR OUT COUPON AND M

“YA evi

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POPULAR MECHANICS ADVERTISING SECTION 117

P \ _* it \ l 903, \ ‘ : | ya ann = Tr? ¢ Lica} I == == “YANKEE No |? t w= =] : - = - come ones ore " = J) r a: as | j= : (se

Holds work till job is finished Some other The “Yankee” Vise lifts offits base; ‘*Yankee’’ Vises with Swivel Base , tak be PL! yvoes with the work from one machine r : . wi No. 199 y 3% in. long, 114 in. YANKEE” TOOLS to another; and back to bench with ¥ i ; _ - ,™ ; 4 a fe Breast Drills the work in the original alignment. am, Beoe Cee 575 ee a ve nd Drills Jal : No. 1992—Body +H in. long, 2 in, in Delile You can be sure of accurate work wide, Jaws open 1 7 in.; depth 14 in. Push Drills by using the “Yankee” —the only vise No, 1993—Body 74 in, long, 2 234 in, Tap Wrenches that is detachable from its base. wide, Jaws open 31 in.; depth 17 in. Bench Drills Sides, tops yo and bottom of vise No. 1994—Body 101% ae long, 4 in. Screw-drivers oe Cs ee wide, Jaws open 4 in.; depth 2% in, turn Spiral Screw Swivel base can be locked in any a saat Soa position. The removable, hardened Without Base } a ne te steel block with V shaped grooves As above: Nos. holds round or irregular work. 991, 992, 993, 994- Dealers everywhere sell TOOL BOOK FREE. Illustrates and d “2 } - . cy pe ] r “OYVANEH ” scribes all the ingenious “ Yankee” Tools fo Tone saving time and labor. Write today for it

NORTH BROS. MFG. CO., PHILADELPHIA “YANKEE TOOLS Qnake Beller Inechanics

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POPULAR MECHANICS ADVERTISING SECTION n ideal gitt tor graduates knowledge of typewriting is a great advantage. And the possession of a Remington Portable is a decided advantage. It has every feature common to the big machines It has the one and only standard keyboard—no shifting for figures—just like the standard office typewriters. It is the easiest to learn—the simplest to operate. It is a Remington and that insures its durability and reliability. The Remington Portable is so light it can be carried any- where, and so convenient it can be used anywhere. And it fits in a case only four inches high. Price complete, $60.00. Easy payment terms, if desired Sold by all Remington branches everywhere and over 3500 dealers. REMINGTON TYPEWRITER COMPANY Department 12, 374 Broadway, New York J N ‘college, in business, and in professional work a THE DE LUXE PORTABLE A distinctive model in Ivory Tone finish, with handsome brown leather carrying case A limited number are available at $75.00 each he best aid. to self~ expression

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POPULAR MECHANICS ADVERTISING SECTION Waterman’s Spoon Feed (Patented) Follows the principle of human breathing—inhales air and exhales ink inexact proportion to the speed and pressure of the writer—never too much, never too little. Waterman’s Spoon Feed is the only soundly scientific fountain pen feed The exact length. depth and made—the only one that holds in per- oer ss fe srrscnr gs and pockets was scientifically deter- fect control the flow of ink from the (hintg in the Waterman Re- barrel to the point of the pen without search Laboratory. skipping or blotting. Size for size, Waterman’s Ideal Fountain Pen is the most beautifully proportioned and finely balanced of all writing impiements. “The Daddy of Them cAll” The most Popular of all Vacation Companions and Commencement Gifts $9.50 4 $5()-00 Sold at Resorts, on Ocean Liners Clip Cap and by Best Dealers the World Over $2.75 with L. E. Waterman Company, 191 Broadway, New York Chicago Boston San Francisco Montreal

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POPULAR MECHANICS ADVERTISING SECTION : Four 150 h.p. and one 300 h.p. G-E Squirrel-cage Motors driving two-stage high-duty pumps supplying Great Falls, Montana. The new tie bucket Thismonogram,which you see upon electric motors, generators, fans and lamps, is the symbol of a nation- wide organization for the service of every community which wants to make elec- tricity do more and better work—the Gen- eral Electric Company “I wish to do something both great and useful for Paris,” said Napoleon to an advisor. “Give it water,’”’ was the reply. No longer do city homes depend on wells or nearby rivers. The old oaken bucket is replaced by electrically driven pumps. In Minneapolis, for instance, a General Electric motor of 1800 horse power drives pumps which supply 30,000,000 gallons a day. GENERAL ELECTRIC

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POPULAR MECHANICS ADVERTISING SECTION —_—— 4 Dollar — for underwear satisfaction O GET the most for your money in athletic underwear, follow these rules: Pay One Dollar—no more. Look for the Topkis label. Comfort? You’ll hardly know you have Topkis on! Roomy all over; especially legs and arm-holes. Topkis fits! Good fabrics. Sound tailoring. Topkis wears and wears. Men’s Shirts and Drawers, 75c a garment. Boys’ Union Suits, Girls’ Bloomer Union Suits, and Children’s Waist Union Suits, 75c. In Canada, Men’s Union Suits, $1.50. Free Booklet tells the whole story. Write for it Torkis BROTHERS ComPANY, Wilmington, Del. jeneral Sales Offices: 350 Broadway, New York City Buy Topkis by the Box —Six union suits for for TOPKIS Underwear. Look for the TOPKIS label. $6. Some men pay as much for three suits— but they don’t know Topkis. Athletic

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122 POPULAR MECHANICS ADVERTISING SECTION Why Use Five Tubes To Do the Work of Three? | Three tubes, duo- {, reflexed as shown at the right, are Sully equal to five tubes in conven- L@ is tional sequence. t The most importantadvance in coupling methods of late years is Erla Selectoformer, materially improving range, selectivity and volume. $5 id Erla Push-Pull transformers andle output of five- pratt power tubes, usin as 350 volts on the 1 plate without distortion. Pair Exclusive, double, tilting springs of Erla Sockets give clean; wiping contact essential to low amperage tubes List 65c and 75c IVE stages of amplification with only three tubes—this is the secret of the amazing coast-to-coast loud speaker range of the Frla three-tube Duo-Reflex circuit, surpassing all but the most elaborate hook-ups in volume. Erla Duo-Reflex action (patent applied for) enables vacuum tubes to do triple duty, as simultaneous amplifiers of received radio, re- flexed radio and reflexed audio currents, multi- plying efficiency while reducing cost. Indispensable to the practical application of this principle, and the foundation of its suc- cess, are Erla synchronizing transformers. Accurately superimposing (1) received and reflexed radio, and 2) rectified radio and re- flexed audio currents, in their coincident pas- sage through amplifying tubes, they eliminate all trace of distortion. Only those who have actually heard Erla performance can realize the vast improvement in tone quality resulting. Other Duo-Reflex advantages, for example, the fool-proof tuning control, giving an accurate log of stations together with freedom from radiation, have equally scientific origin. Erla Selectoformer, tested capacity condensers, and fixed crystal rectifier spell outstanding ad- vancement in their respective fields. For complete Erla circuits, ask your dealer for Bulletin No. 20; or write, giving his name. Electrical Research Laboratories Dept. J 2500 Cottage Grove Ave., Chicago ERLA Undupli« ated sensitive range and volume, fron through employment reflex transformers Even three stag impair the dean yrt perform: ance of Exla transformers, ar ment unduplicated Any panel i is Improved ness, 200 to 700 meters. se assur f Erle st $5 ad by Erla bezels, finished bright nickel or dull « with telescoping mn 1 \%* to 4" thick material. ¢ } ont

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POPULAR MECHANICS ADVERTISING SECTION $15,903 1n9 Years/ CFhats What My ViolanoPaid Me most per- nent in the eproducing skill of an The finan- ts through 7 -: . no Virtuos« S | ged $33 o8 RS : 4 \ iolano $147.25 a Investment truly, m Chart lichalek, ‘ n, N.J $95 PROFIT ON EVERY $100 &°: s ber me. | hest and most liberal profit on any article sold in your store is shown h ye 3.33 per mo. | 1 t lano. It turns profits over on an average 19 times a month. Profits i e 500 on the —— - sold by the Violano are 19 times as great as the expense! , r 3 .) oe he Violano plays 20 times it takes in $1.00 in cold cz ash. 95 cents of this - - — — = _ CLEAR PROFIT. The remaining 5 cents goes for music, electricity Your Profits on Increased Trace ntals —— a ~ World’s Only Self-Playing Violin real violin inside the console—remember it is the only self-playing the world. There is no music like violin music and when the harmon- no accompaniment is added a remarkable, rich volume of music is \ t per pe One of the Eight Greatest Inventions 100 768 44 the only musical instrument 1900% Profit Turnover 19 times won the distinction of being Every Month. Yearly Profits of $1,140 one of the eight greatest in- Profits over a ten year period $11,400 f the decade, by the Patent Increase in Trade 20%-50° It is easy month and year by year earning tabulations show e Government. to get. the money-making ability of the Violano. The r . figures show average profits of $75-$125 a month ap eee. BIG SOOK FREE} of orchestral music is avail- any business depends upon satisfied cus- Send for ‘‘Music Profits’’—a valuable book Violano. Customers willingly tomers. The Violano brings 100% cus- containing money-making news, suggestions, 8 for a rendition tomer satisf: etion. The “Violano habit ’ trade data and pictures. Sent absolutely free it Sells Other Merchandise: It arora onlypeotaranse nee " : 7 to business men rowds to your store by its brings patrons in daily . = ; usic. They buy nM. m= Mail This Coupon! , hile oo buy other mer- It Does Its Own Work: The Violano Tn suet, Geis Henan ape eels aeaieln aa a it Furnishes Entertainment: Mer- is its own clerk—its own cashier It store without music is dead takes up none of your time. It occupies rs want entertainment and only 11 square feet of floor space—its re they can get it music fills your whole store Thousands of Violanos Net Profits of $75-$125 a Month Through good times and dull times our month by MILLS NOVELTY COMP.NY, 823 W. Jackson Bivd., Chicago, Illinois Gentlemen: Please send me without obliga tion on my art your big book ‘‘Music Profits,’’ which contains money-ma) r news MILLS NOVELTY COMPANY, “stiontbiciuratan wade World’s Largest Manufacturer Coin Operated Machines ne 323 W.Jackson Blvd. CHICAGO r pe HES: New York Boston Pitt burgh Detroit ‘ l °o Kansas City Indianapolis Atl ta Dallas

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POPULAR MECHANICS ADVERTISING SECTION 1 There’s double strength, double elasticity in the Hanes webbing belt. It’s 2-thread instead of single. Sewed especially to prevent rips and tears. 9 Talk about com- Y) fort! The Hanes closed crotch stays closed. It’s cut and stitched in a_ special way to insure comfort. © t a . a aa 3 173 A wide, full-length knee that won't creep up your leg—won't bind! 4 Here's an armhole that can't curl or rip —large, roomy and friction- Jree. 5 This button re- fuses to come off It’s sewed to the seam. Four thick messes of material instead of the usuel . two. No patch. Money can’t buy greater summer comfort brea money never went fur- ther than when you put it into Hanes Athletics. Such com- fort, freedom and coolness—a fit that feels just right. Look over the Hanes points shown above. Here are five ATHLETIC UNION SuITs | safe we are in guar- anteeing absolutely every stitch, thread and button. Go in to your deal- er’s to-day and say “Hanes.” Feel the fabric, look over the workmanship. You'll know that the price—a dollar— reasons why men everywhere, to say nothing of their wives, have come to the con- clusion that it “pays to say Hanes”’ and have stuck to it. The end of the summer will tell the story of Hanes value. Wash-day after wash-day, rough and ready summer wear—Hanes still looks, still feels, still fits the same. Then you will know how Neat Winter Wear Hares Wintrn Undorwenr can’t be matched. Youngsters can be outfitted in ! Hanes too. And how they wear! Boys from 2 to 16 years—sizes 20 to 34. Read this guarantee: We guarant Hanes Underwear absolutely —every thread, stitch and button. We guarantee to retur! your money or give you a new garment any seam breaks. P. H. HANES KNITTING CO. Winston-Salem, N. C. New York Office, 306 Broadw iy I\\\

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POPULAR MECHANICS ADVERTISING SECTION and it’s YOURS The Greatest Typewriter Bargain Ever Offered DOWN dreamed of—an eye opener. Rebuilt Underwood only $3.00 down. easiest monthly payments, shipped direct to you from our big factory. . 10 Days’ Free Trial Yes, only $3.00 down puts this genuine late model Shipman-Ward Rebuilt nderwood in your home. You can try t, te st it, and then decide. See for your- yw new it is, how it writes. You t : be satisfied. Your $3.00 uncon- ially returned if at the end of ten iys you are not satisfied. The entire tion will not cost you one cent. EASY Monthly Payments Litt] le more than rental. ments th Balance of pay- so small you will hardly notice em, while you ae | the use of this wonderful machine. You don’t have rimp and save to pay cash. All at , Saving to you. 5 Year Guarantee With every typewriter we give a writ- . a guarantee. These machines are t like new by the famous SHIP- M AN. WARD PROCESS. Equipped with late improvements. You can’t tell them from a new machine. The world’s standard typewriter, the same models as sold by the Underwood Typewriter Company today, at a big saving to you. Act now! Get this piendid offer and save money. From Factory toYou These machines are shipped direct from our factory—the largest typewriter re- building plant in the world. They are rebuilt by the famous SHIPMAN- WARD PROCESS. Developed through 30 years in the typewriter business Through our money saving methods of rebuilding and elimination of a large expensive sales force we are able to make this wonderful money saving offer to you. ACT TODAY, take advantage of it and you will SAVE MONEY. ACT NOW! Mail this coupon today. Free Book of Facts Write for this free book of facts explain- ing Shipman-Ward's wonderful system of rebuilding typewriters. We show you exactly how it’s done. How you are able to buy them. Complete and valuable information about the typewriter indus- try, both instructive and educational. with Every FREE Typewriter A complete course in touch ty ing. You don’t have to know how to —- a typewriter. You com barn, go ~y - this machine in one day. so give free a waterproof cover ba all tools that come with a typewriter. writ- Right now we are making you the greatest typewriter offer you ever This wonderful standard Shipman-Ward Ten days’ free trial and the SHIPMAN-WARD MFG. CoO.! A212 Shipman Bldg., Montrose and Ravenswood Aves.,Chicago | All Shipments made direct to you from our modern factory — the largest typewriter rebuilding plant in the world. FREE BOOK COUPON SHIPMAN-WARD MFG. CO. A212 Shipman Bidg. Montrose and Ravenswood Aves. CHICAGO Send by return mail your wonderful offer of Shipman-Ward Standard Rebuilt Under- wood, also your book of facts. (This is notan order and does nm ot obli ate me ina STREET oe Post OFFICE — EEE ny way.)

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POPULAR MECHANICS ADVERTISING SECTION | Ai | " J Lasse/ “What’s Eddie looking so black about?” 7 H, he’s sore because I won’t lend him my Starrett Com- bination Square—the one tool I can’t get along without.”’ “Well, he’ll get over it. One of these days he’ll buy one and see for himself why it’s such a hard tool to borrow.” STARRETT UST as it stands the Starrett Combination Square Combination Square gives you seven tool uses combined in a single handy, No. 11 accurate tool. Rule, Try Square, Level and Plumb, Depth s Gage, Height Gage, Scriber and Miter. But add a Starrett Protractor Head, Center Head and other Attachments and at a small cost you have doubled the usefulness of this splendid tool. For more rapid work and more accurate work from fewer tools get a Starrett Combination Set at any good hardware store. The new Starrett Catalog No. 22‘‘AP”’ shows the various Attachments that can be added and illustrates the many different uses. Write for it. THE L.S. STARRETT CO. The World's Greatest Toolmakers Manufacturers of Hacksaws Unexcelled Tools

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POPULAR MECHANICS ADVERTISING SECTION An athletic-trim Keds model \ trim styles are built for ports and vacation wear. el has the popular lace-to- A Keds model with Crepe Sole e Keds are distinguished by ghtness, ground grip and Keds Crepe Soles are vul- h makes them tough, and greatest possible adhesion leand upper. Insist on Keds. Another athletic-trim Keds a-lace-to-instep model. You t Keds with black, brown or n—smooth, corrugated or suc Keds are a complete line of can- vas rubber-soled shoes, varying in price according to grade, size and style—from $1.25 to $4.50. Keds with athletic-trim are not only standard for sports and athletics but are ideal shoes for all vacation wear. Keds with Crepe Soles are the choice of thousands of tennis players— including the ten leading players in the country. ere are many othe t Keds models — high shoes and low, with tan or white Photo by Levick The hardest grilling sport shoes ever got —a whole season on the feet of one of the greatest tennis players of all times—and still good for more Grilling practice games — famous championship matches. Bearing the brunt of every last ounce of energy from a human dynamo! These Keds not only were still good for more wear after this ter- rific test—but they had already lasted over a period when this famous champion would normally have outworn three pairs of shoes! Records like this help to explain why Keds are the standard shoes for sports and athletic use today. Leading players and champion- ship teams everywhere are wear- ing them. They’re built to give the maximum of speed, ground- grip, comfort and wear. Keds are a complete line of can- vas rubber-soled shoes, varying in price according to grade, size and style—from $1.25 to $4.50. It is important to remember that all canvas rubber-soled shoes are not Keds. Keds are made only by the United States Rubber Company. They come in a wide range of styles and prices. But every pair of Keds is built to give longer wear and better service. And every Keds shoe has the name Keds on it. The 1924 Keds Hand-Book for Boys is full of things every boy will want to know about. How to make things—rules for sgames—wood- craft, etc. Sent free if you address Dept. 136 1790 Broadway, New York City. United States Rubber Company They are not Keds unless the name Keds is on the shoe Trademark Reg U.5. Pat. Of.

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POPULAR MECHANICS ADVERTISING SECTION EE Breast Drill Light in wales | low in price HERE IS A HAND DRILL that has the advantage of being light weight and easily handled—and it is also low priced. Aluminum frame. Steel pinion gear. The guard of hardened steel holds the gears from slipping under extrem¢ pressure. The steel spindle runs on ball! bearings, and keeps end-thrust friction out of the tool and puts it into the job. All-steel chuck with three hard- ened jaws that grip all round-shank drills up to %-inch diameter. Write for the Goodell-Pratt Catalog No. 15, which shows the entire line of 1500 Good Tools. It’s free. GOODELL-PRATT CO.,GREENFIELD,MASS.,U.S.A. Makers of Mr. Punch of

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POPULAR MECHANICS ADVERTISING SECTION Brolvex*e*.ex*ex*onorrn UUcowel Junta Le Special 21 Perfect Jewels Adjusted to Positions Adjusted to Temperature Adjusted to Isochronism C7 Adjusted to the Second . 25 Year Gold Strata Case Your choice of Dials (includ- ing Montgomery R. R. Dial) On, New Thin Models. All sizes. prov W: LE other watch dealers are raising their prices, ‘ing you for larger monthly payments, and ‘ing payment terms harder for you to meet, we are offering you our new model Santa Fe Special, no in price, no money down, easier terms and ‘monthly payments. We realize the war is over order to double our business we MUST give y var inducements, better prices, easier terms, and smaller payments. Send No Money Without one penny of ad- vance payment let us place in your hands to see, to examine, to inspect, to admire, (0 approve a real masterpiece in watch creation. Our determination to this year double our sales of the world famous Santa Fe Special and Bunn Special Watches rompts this matchless offer. Ladies’ Wrist Watch—New Elite rhis Artistic dependable Ladies’ Wrist Watch, fitted with genuine I'linois Springfield movement. A perfect timepiece. Beautiful 14 Karat white or green solid case. Many designs Ask for New Watch Book showing New Elite case designs in color. Watch sent on approval and sold on payments. Page 12 of Our Watch Book Is of Special Interest to You! for our Watch Book free—then select the watch you would like her the famous Santa Fe Special or the 6 position Bunn ar a let us explain our easy payment plan and send the express prepaid, for you to examine. No money down N : . >. REMEMBER — "y ~ money down—easy payments buys a master sa 06 Thomas Bide. Topeka, Kansas mepiece—¢ Jewel guaranteed for a lifetime at about half the price you | ay for a similar watch of other makes. No money down. A wonderful offer. Please send prepaid and without obligatio: Watch Book free, explaining your No | Down” Offer on this Santa Fe Special Watct SANTA FE WATCH COMPANY ! 66 Thomas Building TOPEKA, KANSAS “Home of the Great Santa Fe Railway”’ ) >> a 3 a A QL 40 C4 Co C8

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POPULAR MECHANICS ADVERTISING SECTION Sargent Planes are szmple in adjustment, keen and lasting! The Sargent Auto-Set Bench Plane is the handiest all-round plane you could have in your workshop. It is true, keen cutting, time-saving. It can be used on the rougher jobs where a good deep cut is a neces- sity as well as on finer work requir- ing a clean, quick finish. You'll find its adjustments remark- ably simple. With the auto-set fea- ture you can remove the chromium steel cutter, whet and replace it without changing the original ad- justment. Then there’s the Sargent Steel Block Plane. This is small in size and a right convenient tool for any work-bench. The special low angle arrangement of cutter makes it par- ticularly good for cross-grain cut- ting and rough or knotty surfaces. And you can’t beat it for the finish- ing touches or work in close quar- ters. See these planes at your hardware dealer’s and write for the Sargent Book of Planes which is full of de- tailed information. SARGENT & COMPANY 49 Water Street Hardware Manufacturers New Haven, Conn. Jools & Hardware

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POPULAR MECHANICS ADVERTISING SECTION ENSATIONAL for over twenty Perfect machines, Standard size, Keyboard of i Universal arrangement, 42 Keys, writing $4 char- iniversally used in teaching the touch system - Easy Terms Only $1.00 down, then a few dollars a month and the machine is yours. This is absolutely the most gener- ous typewriter offer we ever made. Why rent a machine when your rent money will buy one? Think of it late model highest grade tire line of writing completely visible at all times; L tabulator, the two color ribbon, with automatic re the back spacer, ball bearing type bars, ball bearing carriage action, ball bearing shift action. This ring construction makes it much easier to learn ron the L. C. Smith than any other typewriter. ves unlimited speed—beyond the limits of human pos ies. Every late style feature and modern ope rating ¢ »,. Comes to you with everything complete: tools, cover, operating book and instructions—nothing extra You cannot imagine the perfection of this beautiful typewriter until you haveseenit. We do the most perfectand highest class job of rebuilding known tothe typewriterindustry. We have sold thousands of these perfect late style machines at this bargain price and every one of these satisfied customers had this splendid, strictly up-to-date machine on five days’ free trial before deciding to buy it. We will send it to F. O. B. Chieago for five days’ free trial. It will sell if you are not satisfied that this is the greatest er you ever saw, you can return it at our expense t want to return it after you try it, for you cannot is wonderful valtie anywhere. FREE COURSE OF INSTRUCTION in the Touch System riting given with every order. The best and quickest of learning. Specially ad: upted to the L. C, Smith. buying a perfect, $102.50 Typewriter at a bargain price. Ball mous LO.SMItH searing beens Just send $1.00 with the coupon and the machine will be shipped at once. Then after 5 days if you are convinced that it is the best typewriter you ever saw, keep it, send us $4.15 and then send us $4.00 a month until our bargain price of $57.15 is paid. All cash, $53.05, just a little more than half its original price. If you don't want it, return it and receive your $1.00 back. We will pay the return express charges his machine is guaranteed just : if you paid $102.00 for it It is standard. Over a half-million people own and use these ty writers and think them the best ever manufactured. The supply at this price is limited; the price will probably be raised when the next advertisement appears, so don't delay. Fill in the coupon today—the typewriter will be shipped promptly. There is no red tape. We employ no solicitors—no collectors—no chattel mortgage It is simply understood that we retain title to the machine until full $57.15 is paid. You cannot lose. It is the greatest typewriter oppor- tunity we have ever offered. Get the coupon in the mails today—SURE. SEND NOW—BEFORE THEY'RE GONE SMIT TYPEWRITER SALES CO. 300-360 E. Grand Ave., Chicago, Il. Send This Free Trial Coupon NOW SMITH TYPEWRITER SALES CO., j 300-360 E. Grand Ave., Chicago, Il. | I enclose $1.00 as evidence of my good faith. Ship me the L. C. Smith Model No. 5, F. O. B. Chicago trial FREE BOOKLET giving description of this machine and other models, also Valuable Typewriter Informa- tion, sent on request. After five days’ The iitle to remain in you until fully paid for. It is understood that I have five days in which to examine and try the ewriter. If I choose not to keep it, I will carefully repack it and ship it back to you and you will return my $1.00 deposit. understood that you give the standard guarantee. i | I send vou $4.15 and then $4.00 per month thereafter as rent until the $52.00 Sates ce of the Special $57.15 sale price is | Business or | Employer I wo References

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POPULAR MECHANICS ADVERTISING SECTION \Réd Devil 6 ) RYO? d fer New my alalog” ‘Red Devil’’ Tools for Long Life Spat a th) EE The value of “‘Red Devil” Tools lies in the fact that they combine design, material and work- manship in just the way that will best fit the tool for its job, and give it unusually long life. Overaquartercentury’sdropforgingexperience behind them. Buy them for economy’s sake.

“Red Devil’’ Pliers For repairing radio sets, gas engines, auto- mobiles, trucks, tract- ors, vacuum cleaners, sewing machines, guns, typewriters, for ama- teur plumbing jobs, etc. No. 1024— 6% inch shown here. $1.10 pair.

“Red Devil’’ Hack Saw Frames For cutting sheet metal, pipe, tubing, cables, steel rods and bolts, structural steel, etc. No. 1048 shown here, for 8 to 12 inch blades. $1.00. “Red Devil’’ Glass Cutters It’s economical to do the little jobs yourself. For repairing window panes, glass sashes, green houses, for mak- ing passepartouts, table tops, glass trays, aquariums, etc. No. 024, 20c each.

Just Off the Press! | A new Series of “KING” Band In- strument Catalogs on Saxophones Trombones, Trumpets, ete : These new catalogs, the finest and most complete ever published, tel! you in detail about the fine workman- ship, accurate designing, scientific proportions and superior mechanica m features found only in “KING @ instruments. FREE TRIAL OFFERand Easy Payment Plan fully explained. Write today for catalog of tne instru- ment you play, or are interested in THE H. N. WHITE COMPANY 5211-52 Superior Avenue Cleveland, Ohio Manufacturers of 33 ” BAND KINS INSTRUMENTS

Fe 3+ as elcha gad lp AREA SA ICY ay Ps See eam 9 wie NS 2

SEND for the INTERNATIONAL CATALO FOR Pay only one protit. rice list Wholesale Prices Saveble money bodies by . { uy « Girect from factory INTERNATIONAL BODY WORKS, Dept. 7, 914 W. Ohio Street, CHICAGO, ILI. |

CAMERAS Over a Hundred Styles and Sizes Send for new illustrated catalog s)how- ing latest reduced prices. It’s Free. 10 days’ trial given SENECA CAMERA MFG. COMPANY 300 Central Avenue Rochester, N. Y

3 + Ss 2e=3-> 2 -g—~e-20r > 4% > ~ 4 Your dealer has “‘Red Devil’’ Tools in stock; if not, send his name, and order from us. FREE—Mechanic’s handy tool booklet. SMITH & HEMENWAY CO., Inc. Manufacturers of ‘‘Red Devil’’ Tools 260 Broadway New, York, N. Y. NEW VEST POCKET Adds as rapidly and accurately as a $300 machine, yet fits the vest poc'cet. Mechan- ically perfect. Easy to operace. Everyone who uses figures should own cone, TS UP TO 999,999,999 | Total visible at all times. A pull of the finger it. Don’t carry a pocket full of pencil "a : scrap paper to do your figuring. Carry @ Ve ys TRIAL SEND NO MONEY. 10 DA Just name al - dress and we will send machine post aid. £ ay | man on delivery $2.95. Use it for 10 days to! does all we claim. If not perfectly satisfied “ refund your money. Limited supply. Orde —— E ADDING MACHINE CORP. ° 170 aes een Street CHICAGO, It L. Here’s a money maker for you. Every>o'¥ A G E N T nave dog one. splonad rofit. Write <0 special offer. IT NOW. are 33\4% easier boring, have 10% greater clearance, and bore with or against the grain of any wood. Style 2400 —10/16 in., shown here, 80c. y \ “Red Devil’ Rapid Boring Auger Bits

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POPULAR MECHANICS ADVERTISING SECTION — a * Eas 10 ® Pay You vi Send for my proposition,I pay men and women $85.00 weekly to as high as $36.00 per day for } either all or spare time help. No experience necessary Si PP EASES a RADIUM LINGERIE Charming ladies lingerie and ho- siery, pretty, low priced, sells on sight, actually. Miss Grace James averaged $36 a day, spare time; R. G. Thompson earned $33 in one day. Youcandoas well, weteil you how. Profits in Advance Your profits in advance, we ship and collect. You show goods and mai! us the orders. Nothing in any store compares in beauty and value to ‘Princess Radium” lingerie and 1B hosi jery. High Grade-Steady Unusual opportunity for big cash quick, write for d territory, buil forlife. te delay, wilsuee ° ROBERTS-FRANK &CO 1733 Irving Park Blvd el 4am F-12 | CHICAGO How To Make More Money Unusually attractive profits easily and quickly made at home in spare time, raising guinea pigs, squabs, ete. Thousands being used. Highest price paid to raisers. Market guaran- teed. No experience necessary, Write today tor illustrated booklet — free. MUTUAL FOOD PRODUCTS CO., 1400-8 Broadway, New York Try before you Buy — hoice of 44 styles, colors and sizes in s Ranger line. Write for our marvelous | terms. Shipped on approval and 3 DAYS FREE TRIAL, express prepaid. %S a Mon: You can get immediate possession and 29> Ie=3-> Sa RoE ~ 4 of your choice from Ranger or icycles on our or libe easy Monthly Payment plan. express est quality at factory a. Lamps, wheels, horns, equipment reoairs at unusually low prices. Mead Sr.cmmany Frank DePries made over a28 | profit in one day. L. D. Payne averaged Z&\ $20.00 profit for 217 days. F. E. Mendenhall worked half time and made $100 a week W. E. Findley ran up his commissions in a | few months from $100 to over $500 per . Every Home, Auto Owner, Store and Fac- tory a Live Prospect. Keeton, Howard, and others, i Fire Extinguishers before. Our special training course starts ai to success first day. If now A — we can show you how ig money during spare time. xperience Necessary. Get Sali s Plan—find out how to A. 2 real m Territory going today! Fyr-FyterCo., Ii Fyr-Fyter Idg., Dayton, O. OF.TIS DIAMONDS WAICHES OF) oe he O82 = 8) SS wDIAMOND IMPORTERS direct from enon are and sell direct by pF ry we to you. Our Diamo: uality’’ gems pee @ wh. : cut, rsonally inspected by our expert WW SSG BB _— BlueWhite, perfect- a) sea g is Soli White Gold. $3750 Other’Solid White or Green Gold rings at same price. WA White, perfect - cut Diamond. Ring is GENUINE DIAMONDS—GUARANTEED SEND FOR CATALOG ov, trations of Dia- mond-set Jewelry, Watches, Wrist Watches, Pearls, Mesh Bags, qeeerwans. ‘ae Sent teagg o a for your Free Examina- tion. SS; , ') CREDIT TERMS All orders delivered on first payment of one-tenth of purch: ce; ™ ance in equal amounts within ‘eight . 88 sults your convenience WEDDING RINGS All Platinum, $25 up. With Dia- : Three Diamonds No. 16—W: : ar White Goid, i7J., $25.75 eri 14-k, 16 J , $24.85 Railroad Watches- Guaranteed to Pass HAMILTON NO. 992. 21 Jewels, Aaganted to& §$ R Positions. Gold filled 25-Y ear G ILLINOIS “SUNN SPECIAL.” 21 Jewds Adjust $50 ed to 6 Pos'tions. Gold filled 25-Y ear ELGIN'S LATEST RAYMOND. 21 Jewels, 7o Adi. S55 winding. Gold filled 20-Yr. LOF & ois Dept.aso4 108 N. State owe] Chicago, ttl. Stores in Leading Cities

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POPULAR MECHANICS ADVERTISING SECTION Solitaire Examination Free This perfectly cut Diamond will be sent of charge for | your complete exam- | ination and —

No money in advance If satisfied, pay only $2.00 on arrival and keep it. Price $30.00. Tokeecs Stained Teeth | “Sn The balance you send Instantly Whitened | csVpvy New Safe Way trotted, FRE De Laze No need now for yellow, discolored, spotted, to- Neg rey $

colors. Write for de- bacco-stained teeth. Bleachodent Combination costs tails of Great Diamond i kk just a few cents and removes unsightly stains in Dent. 64-4 — three minutes at home. Leaves teeth white, lus- | Capital $1,000,000 7,2? trous, clean and flashing. Recommended every- . , : a Ver} THE HOUSE e) a DUALITY where as quicker, surer, safer than old-fashioned scouring methods which injured the enamel. Bleachodent Combination contains a marvelous -SWEET INC. mild liquid to loosen stain coats and a special paste which not only removes them, but used daily pre- TE | 660 BROADWAY, NEW YORK vents formation of new stains. Only a safe, mild preparation —— * like Bleachodent Combination should be used on soft, sensitive Shetk-Lwre New Imported Perfume Sensal . teeth which stain and decay easily. Acts only on stains — not —No Liq uid — No Bottle on enamel. Be sure to ask for Bleachodent Combination by its Just a touch on the skin and full name. Distributed by B!eachodent Dental Laboratories the haunting romantic fra- and sold by drug and department stores everywhere. i ' neq, Gente i , lingers . Eve adores it. Bets axe. Beauti- Ruby Transparent ad Case for lavalliere or yest pocket. Outlast Pf liquid $10.00 value. pene No Money. [a with Fi »stman only $1.00 when perfur ves om é , 2 fF you wish epcione | J 1 ar t w rdes MINNEAPOLIS SO month

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POPULAR MECHANICS ADVERTISING SECTION 135 fiorest Real aaa ee Anna Q. Nilsson L43 A] Made on a different ple from all other Air- Rules, The Benjamin is really a strong air- pump used to compress the air Eo the air chamber to any degree of power desired. From one to six strokes of the pump give all the force necessary. Each additional stroke gives increased power. The Benjamin works on the same principle as all air-drills and air-hammers—with this difference: You control the shooting force as you de- sire. Look at this block of hardwood. Jt shows how Benjamin power is regulated as you wish, You can’t have accidents with a Benjamin. It's J, * always, because you control the Benjamin never loses shooting =< has no springs to get out of order or shake your aim. rite us for an interest- ing folder about this wonderful air-gun, If your dealer does Ask your bot handle seme,send dealer for direct to factory - demon- PRICE $ POSTPAID BENJAMIN AIR-RIFLE & MFG, CO.,015 N. Broadway, St. Louis, Mo, Los Angeles Calif., and

AG ENTS Every woman = this Eas y to Pl ay : . . Everyone finds the York Saxophone richly melodious, fine in handy kitchen convenience quality, superb in tone and easy to play. Miss Nilsson, the Ifa profit of 79¢ each on 10 to 30 salesa day ap- renowned motion picture star, is high in her praise of the ex- ys peals to you—line up with us. Tyler's Ideal Fibre cellent workmanship apparent. You can satisfy your desire : . t - “ to examine a York Saxophone by having it sent to your home on Cutter is “the handiest tool in the kitchen” and our new Sales Manual gives you a selling plan & DAYS 9 F a E bh T R IAL that really works. You are sure to succeed. ‘ ny | House-to-House Salesmen Play on it in your own way, compare the tone quality, the ; ; make from $40 to $100 Week! ‘ how voice, the remarkable ease of blowing. Note how quickly you easton, y : 3 can master the scales and learn simple tunes. If after 6 full ; Write to ‘é days, you aren't delighted simply send the instrument back F and it won't cost you a penny. If you decide to buy all you athe ay have to do is to make small monthly payments on the balance - In fact you can have any York Band Instrument on our free trial and easy payment plan. State instrument you want FREE Book About Taxidermy sent on the coupon below. eae st hes at heme by mail _to mount : kins. Boa tanider- ounce os ON | Brilliant New T t Sag Mra ena a ant New Trumpe Wonderful Sy: i - j W. sf arin peek and ot gmasing offer. Lgmy Bo =a ® This is the latest creation of the House of York. Snappiest, smallest bore trumpet made in America. Gives the player all those effects necessary in jazz orchestrations. Very brilliant Workmanship positively the best—beautiful model. Playing does not tire you. Let us send you particulars. Also send for free trial and sold on the easy payment plan. Use Coupon actory to wearer. sy today. » Bae sis daily.Under- where.Make al nder- Since ) sel] stores complete line. Ex- J. Ww. Yo R K & Ss Oo N Ss 1882) clusive patterns. No experi- ence necessary.Free samples. Dept. 221-F GRAND RAPIDS, MICH. Chicago Shirt Manufacturers, : ——— J. W. YORK & SONS, Build This Phonograph Yourself Dept. 221-F, Grand Rapids, Mich. Gentleme indly mail, without cost to me, your TREMENDOUS SAVING IN COST ee ~ a literature and details of your Easy, fascinating work with our SIMPLIFIED Free Triai and Easy Payment Offer. PLANS. We furnish blue prints, diagrams, motor, cabinet pieces, ready-built horn, etc. You don't need to be a cabinet maker. A few hours assem- bling and you will have a fine instrument at one- quarter the regular retail price. AGENTS MAKE MONEY making and selling these instruments. Write today for full details and our FREE OFFER. Address Instrument ben we UP ERL PHONOPARTS co. (Mention instrument interested in) 2648 Ww. Ave. Dept.14 CHICAGO, LLINOIS w M

Address

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POPULAR MECHANICS ADVERTISING SECTION IT’S AWONDER! || |peeacitt Does Everything in Woodworking “A ae the may ONLY 8 inch circular rip saw $225 | ’ 8 inch circular cross cut saw rg Bay te lets vA 11 inch band saw at oo. with motor ly 4 inch jointer factory price ‘ shaper 5 taps (sizes 4” : and 4” 10 inch sander 5 dies to match lathe — 14 i i A die stock 14 inch on A tap and reamer wrench. Parks Cabinet All of high grade tool steel, accurately cut. . Indispensable for threading nuts d bolts Shop Special about the farm, experiment shop and auto- : ¥ mobile. In factory use, a stock set of these is the last word in port- taps ran over 10,000 clean cuttings! ee Pa aggprcense pgs cecal SPECIFY WHETHER YOU WANT U.§ able, small shop equip- (GOVERNMENT STANDARD) OR S.A} ment. (AUTOMOTIVE) THREAD It is a band saw, shaper, lathe—all in one. You ee wel Hundreds can do sawing, rabbetting, planing, mould- ing, matching, panel raising. Just the thing for your home shop! You can order it com- — ORDER plete or with just the attachments you want. ny | Write for circular eo The Parks Ball Bearing Machine Co. | ne ar | > circular on 1500-1540 Knowlton St., Cincinnati, Ohio ; L request. Canadian Factory: 200 Notre Dame East, Montreal, Can. of Satisfied Users a ee Worcester Steel Products Company Dept. 2, 25 Union Street Worcester, Mass. potcotens pit pyite DWORKING | MACHINES || New “il. P. 110 volt A. C. Guaranteed = 60 cycle, complete with cord, plug and pulley Gen. Elec. 1725 speed $14.75 Gen. Elec. 44 H. P. Rep. Ind 39.00 F Master 34 iv P. Rep. Ind 52.50 Master 1 1H P. Rep. Ind 60.00 That is what . é Special values in rebuilt sviors. J. W. Fleming, Ind., A : wrote six months after we : HYRE ELECTRIC Co. started him as an “American . : cago, Mil. Universal’? Floor Surfacing con- 615-T S. Dearborn St., Chicago, Ill tractor. R.E. Waynick, Texas, says, “I have made $30 in 8 hours.”* Don Arnold, Ind., says, “I have made as pigh THE SCREWDRIVER THAT HOLDS THE SCREW as $40 aday."’ Scores of others are doing ~ , as wellor better. You, too, canmake big money As Good as a Third Hand in Assembling ~ anything from a Watch to an SURFACING FLOORS Appeal The electrically driven “* American Uni- Especially to Rad \ versal" Floor Surfacing Machine does 5 amateurs and professionals. A wo the work of six hand scrapers, earns you ay ; six men’s pay. Field is unlimited, demand ea derful (patented) | Improvement pan Every — laid floor must obbers, Dealers and Agent » surfaced, every olc oor represents a or Work is pleasant, interesting. Small amount starts you. Here's 18-25” Gap Bridge loose * e. . change gear engine lathe. Your Big Opportunity | to be your own boss, to build a For paying business, and make rea] money from the start. We help you, show you how and where to get work, furnish adver- tising, stationery, office Write orms, everything you now for need. free details of this rare opportunity. The A ; High in Quality e merican a ‘ ' Floor Surfacing — Low in Price! . Machine This big capacity, low priced lathe is the tool for the progressive garage Company take care of your requirements sa‘ torily and in time pay for its cost in savi! WRITE FOR DETAILS. The Sebastian Lathe Co., 22zcfanari “ono JH | St. TOLEDO,

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1oiors, te oF igo, Ill. POPULAR MECHANICS ADVERTISING SECTION Even on a fishing trip you will find Pernard Phliers (No. 128) unexcelled for rigging tackle. Bernards with the outside blades cut smoothly, cleanly and closely. The parallel jaws give an ali over grip that can't slip. You will find them useful in a hundred ways. Insist upon BERNARD Standard High-Power Cutting PLIERS No. 15 — Bernard “Parrot Head” Spring Pruning Shears Catalog “‘P’’ free on request from i WM. SCHOLLHORN CO., New Haven, Conn. PILLIOD Tool Cases Excel Machinists, Tool Makers and Car- penters find them most satisfactory in construction, appearance, service and price. Immediate shipment. Booklet describing 20 styles on request. THE PILLIOD LUMBER CO. Dept. 1 Swanton, Ohio LATHES 9 to 18-inch Swing List price $1#5and up according to size. When ready to buysend for Lathe Catalog and prices. W.F. & John Barnes Co. 100 Ruby Street, ROCKFORD.ILL. St. Paul Welding & Mtg, Co, 177 W. 3rd St., St. Paul, Minn. MAKE MORE MONE TORIT ACETYLENE TORCH NO. 13 ng, heating, melting, tempering, auto radiator repair- y repair work, and for all kinds of small jobs requiring e Instantly. Usually pays for itself in a single day. USES ACETYLENE GAS ONLY th 4 tips for different kinds of work, eusertag copper, ing and connection for auto-acetylene tank. . $7. 50 | — 2 © ©) @ >> — Bar — ie OD BD —>p © SAWS A Perfect Saw for Every Purpose For every man who uses saws there’s Atkins saw to do the work easier, quicker and better. Here are just a few of many popular Atkins Saws. No.400 HAND SAW SHIP POINT Finest saw made; Genuine SILVER STEEL BLADE, Ship point, 26-inch length, taper ground. MIRROR POLISH. ROSEWOOD HANDLE, Improved Perfection Pattern. Skew or Straight Back. JUNIOR MECHANIC HAND SAW A new saw for the Boy Scout and junior or radio mechanic. Made 20 in long, skew back, taper ground, highly polished; cherry handle. No.!0 HACK SAW . Hard rubber handle, “easy grip” pattern; hung low, steel frame is nickeled and highly pol ished; adjustable to 8, 9, 10,11 and 12-in. blades. No.3 NEST OF SAWS Includes 12-inch keyhole blade, 14-inch com- »ass blade and 18-inch special nail-cutting lade, interchangeable in adjustable handle. Booklets FREE shows Atkins wood-cutting saws »” “Saws in the Shop saws, and contains “Saw Sense” and tells how to file saws shows our metal-cutting many helpful suggestions. To get booklet you want. write your name and address and deal- er’s name on this page and mail to us. E. C. ATKINS & CO., Inc. Makers of “‘Silver Steel’’ Saws and Tools Dept. P Indianapolis, Ind. Please Mention Popular Mechanics

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POPULAR MECHANICS ADVERTISING SECTION

—do it with a few cents worth of Smooth-On No. 1 and you'll get a perfect permanent repair without putting anything harmful

Miller Made $30.00 in one evening At last_a vacuum cleaner for use in any home. Noelectricity, no wires, no trouble 8, no running costs. C hild can runit. 80 per cent homes have no electricity. Everyone buys quick. Nocompetition. Women are looking for this cleaner. Wantit. You are

sai . , - (— WELCOME. Sells itself. Big profit inside the boiler and with- { = quickly made—es asily made. ecm out having a big plumb- ——— Goes Anywhere er’s bill. ah hs! | Weight only 7 '2 pounds. ns CxS Smooth-On No. 1 E+ ° . | a ¢ > *k se: 0, sady in use. Ever ameet. She simple, quick, owe Proved Proposition 2... (ia sciis ceyere eve crertiam means for stopping leaks in boil- If you want to make $5,000 to $10,000 this year De ; ; sata every year, write us NOW. The secret of | 1S Boo ers, radiators, furnaces, water money is to see a winner and grab it. But they Y!

used for hundreds of other house and automobile repairs. . The book we send free tells you how SMOOTH ON to use it, and you can get your supp'y

FREE pipes and tanks, stove pipes, goquick. Write TODAY 7 kitchen pails, etc., and can be THE MARVEL CO., Dept. 211 i\\ Hammond, Ind. VA — —) = : | : - , ochester, N.Y. |} H There’s remarkable gun Ss OTGUN a Stevens. Write for Ta or R I F L E esting catalog descril ou J. STEVENS ARMS, COMPANY ma Dept. 575 Chicopee Falls, Mass. Owned and Operated by the Savage Arms Corpora poset. It isthe wel! known quality of CRESCENT un a Oat am justifies you in selecting one — The MONARCH dr, Lathe oe | oo wo in ma er e p CRESC ENT ing. better t e er Inventors, experimen- apd ny for ters, Mechanics, and cabelas, ct bend eure “ Auto Repairmen— here is an ideal, compact trouble-proof lathe— instantlyreadytohelpyou turn out the small parts you require. Itworkstoan THE CRESCENT MACHINE CO., 93 Columbia Street, Leetonia, Ohio accuracy of 1/1000 of an —— inch. Can be installed on MATH EMATICS your work-bench. Has tht semi-quick change gear and automatic safety de- vices. Built with bed Monarch ir. Engine Lathe * Oo lengths to 5 feet, also with P ‘ 11 inches swing at slightly 9-in. swing, 24ft. bed 27 higher price. Write at once for your FREE copy of the MONARCH Lathe Catalog. MONARCH Lathes are built up to 30 inches swing. THE MONARCH MACHINE TOOL CO. 400 Oak Street SIDNEY, OHIO jointers, shapers lane planers and matcher g saws disk grinder, cut off b chisel! mortiser, variety ec, Universa! wood work«

rk

can be easily mastered w Slide Rule. With oe cal stantly add, sul tra m sltit combination of deci imals, fract mixed numbers. Also obt Logs. and Trig. Functions. F : , It is used at all colleges, 200 @ at Cornell, etc. The Engine-Divi on white celluloid, mounted on ® - are grease and waterproof. Diam« $1.50 Price with Instruction Book ° —— c ase Sec extra GILSON ‘SLIDE RULE co., Nites, Mich.

ales are

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ee catalog. ns. N, OHIO s, Mass. quality of 8 that ting e work ke lonia, Ohio $1.50 ites, Mich. Oe th GOATS 3M FS a von POPULAR MECHANICS ADVERTISING SECTION .DJAMO Pi . aes c RE 5 ae p L ~ 7 yom tly” Fiery bluewh Abe “w/ “Butterfly” Fiery blue white //4/)0 i alin, 2 m - 18k. . perfect cut diamond. 18k.white WV Oy COC So Re nthe Fy —— Ly gold hand engraved and a ring. Yiif/j ‘ ee ee / $62.50—$2 Down—only $1. we et hy) TEN DAYS’ FREE TRIAL | No. 2. “Vassar”. Artistically pierced |) //// " \wail Easy for you to own or giv i lace work design, 18k.white gold. Perfect Virtte for i these hendeome rings. Gta ooaa $2 leut blue white diamond. .50—$2 Down ioe os. iwi We will send ring you select on 10 da 3° '| —only $1.00 a week. ’ Ww, iamonds iwaitrial. Only if satisfied, make weekly No.3. “Cluster’’. 7 fine white diamonds atches Jewelry WY] payments until balance is paid. If youdo ‘A set in platinum. Resembles $750solitaire. $10 to $1000 i# not agree it is an amazing bargain, re- ‘\ 14k green gold. Rare beauty. $52.50—jj]j, on easyterms. |\wi turn ring within 10 days and we will \$2 Down—only $1.50 a week. Wonderful values §./ refund your $2. You take no risk. aE =F Na- wa =) -fol es... pevt. 626 MEA QICU MA kL ae ead Every Ring. | | PORTABLE woexncBENCH VISE] = | Change Blades Instantly , | SIMPLE- EASY TO ADJUST - EFFECTIVE In this Simore Combination knife and screwdriver, there i F | CARPENTERS Positive in action Will do more are three blades in the handle. Each blade snaps back / 0 :

into the handle after it has done its duty just as VA (NMA OD EP and better work than stationary 18 show n here. A nd you select and produce the 7) Ri} MANUAL TRAINING DEPTS, vise Carry it in the tool hit ~ blade you want by gravity just as easily and VA °, quickly. You actually change blades instantly 7) Sr, Weighs only half pound Wont — ny 2 with this tool. 3 ©\ rust. Saves time and labor. | ModelNo. 12 with knife blade and $2 25 (® J Sent postpaid for only 41.25. | two screwdriver blades. Only ° ¥ S| Agents Wanted Model No. 11 with three screw- $1 80 f \ aoe oe A driver blades . . . . Only ° \ . mon Centra rs) | Sent Pp stpaid on receipt of money order or CINCINNATI your check. Satisfaction guaranteed. Ask your dealer or write direct. Dealers are invited to write for information on Simore tools. THE SIMON & SKIDMORE MFG. CO. Dept. 4-6, SANTA ANA, CALIF.

Protect your tools from Write any name, engrave any design a! with electricity like writing with pen or pencil. Complete prepaid anywhere. Interest- ing des ve circular free. Write today. Age nted. Arkograf Pen Company 1171 East Stara St. Portiand, Oregon

° Works fast. Slides in nter oO and out quickly. Dur- ably made of brass MASTER SLIDE RULE trimmed boxwood. Takes accurate inside or Any length 2 to8 feet, 4) A oe . 20 cents per lineal foot. J outside measurements 5 not at deaier's, sent postpaid. | | : enbidlemen. A flat 7 saving to you of better than a dollara e . gallon. J that has been the standby of Invention ’ thousands of customers for more than 20 years. . GENUINE HIGH QUALITY has not been sacrificed for the sake of price. Converts any stove Our paints are ready-mixed for immediate use; 4 > | all fresh made; no staling on dealers’ shelves. )}a gas stove. OXO-GAS is made And our iron-clad r ° ° ith eve from kerosene and air (mostly air). MONEY BACK GUARANTEE fro. "cols, “thi 1 . means your complete satisfaction or your money back— Cheaper, cleaner and more efficient Seergty cad without axgument. Test the quailty your- than coal. Eighteen different models FREE TRIAL OFFER Yat, your order. Try the paint. If you don’t!ike it.return ior all purposes. pense and we'll refund your money. Responsible distributors wanted GLORIA LIGHT COMPANY Givcxco°rt!

eat attractive ropes | \HOUSE PAINT

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POPULAR MECHANICS Reg. Price 50¢ Brings you this big Plumbing and Heating Encyclopedia-C atalog. Write for your copy today without fail. Guaranteed Heating Plants Our Handy-Man Book shows how. Big 256-page well-bound encyclopedia of Plumbing and Heating Outfits, Systems, Supplies, Fixtures and Accessories— 10,000 items—illustrated. Hundreds of floor plans, elevations, diagrams, trade secrets, money and trouble-sav ing kinks,etc.,‘*How to save cont in _ aN w “Easy repair methods.”’ 3 very householder, contractor, farmer, mechanic, institution needs this book, “et Water Bolter Shows how to save wages, work and materials. Big Handy Man Book Tells how we help you plan and install From rough sketch or description we supply working plans and clear instruc- tions. We loan the tools needed. Any handy man can install. This is the place to buy on money-back guaranty. Plumbing Outfits and Supplies; Water Systems; Hot-Air, Water or Steam Heating Plants: Radiators, Pipes, Boilers or Septic Disposal Tanks. Send 25e for Yours Today We have spared no effort or expense to complete this remarkable and instruc- tive book. To keep from sending it broadcast to disinterested persons, we request a deposit of 25c, which will be refunded on your first order —or send for our FREE Bulletin.Write Water supply today and save >) System half. HARDIN-LAVIN CO. 50 Years at 4547-57 Cottage Grove Ave., — CHICAGO See our advertisement on |'|')| outside Back Cover April 1924 issue of this Magazine MONEY: 0c ANIMALS Chinohiite Li Skins A... $3.00 Soom 80 young fake * Skunk, — ao are Also "Caries, ven, onait raised my = FREE pags e book an on — Fur Farming Magasine 10c ™ ¥ = aS ene 1 year 35c AMERICAN FUR FARMS, Box ARK, MISSOURI Any Style or Design forMen,Women,Boys, Schools, Clubs, Teams Order direct from mill. Save from 20% -30%. Pick any style, any color, size or design from our regular stock or special to cree. — virgin wool and pure worste: . Custom tailored workmanship of Righest grade. Closely knit. Warm, soft, snug. beauties Fe) you will be proud to wear. (C\ FINEST QUALITY AT 9 ra qi BARGAIN PRICES Always holds shape. I Most customers get from 3 to 6 ears wear easily. R E pap wears Can moss severe wear and retain right, fresh appearance. Biggest values inhistory. Work- Catalog manship guaranteed. Prices slashed. Unusualchance to save. Special offers to schools, clubs, teams. Write for free illustrated catalog. AMERICAN KNITTING MILLS Dat S°“c.nexes Dept. 23 CHICAGO ADVERTISING SECTION pon PROFIT | giN_3¥/2 HOURS . A. Barton, Indiana, made that amor making and selling Candy Floss. Others send in amazing re $s: Small, Chics says-- “Did $125 usiness on Sunda Wendel, Kansas, writes, ‘‘ Average: day for 3 weeks.” Gardner re ports, “*2 sacks of candy sold from 11 a.m.to 10:15 p.m Bi ——— Goan be Rees says: ane In 4 nights ir . ville, Ohio.” Candy Floss is sonnei, ween Slane soft as cotton, white as s any color or flavor. Can be made anywhere -.in indow, in parks, on street corners, at aw materials ples titul and che cap Send name and address for reei us oO tal. Actnow! Address Kot tacte.Drop pee. A. T. DIETZ aa Sayso Bidg. Toledo, Ohio . On All Standard Make ‘Typewriters . . , Lowest Prices inYears We will ship any choose for one wee: Underwood, Royal, L. Remington, Oliver, et Pay less than rent each mont! Easy Terms typewriter. Guaranteed good Perfectly rebuilt by experts—the famous ‘“‘Young P Send for our free trial offer and new low price list nor Young Typewriter Co. 654 W. Randolph St., Dept.1106, CHICAGO, ILL. Beautiful HOUSES $O()0 and BUNGALOWS CAN BE BUILT FOR AND UP This and many others in my new book, Building Plans for Modern Homes, will save you hundreds of dollars. One ot the most complete and comprehensive books of plans ever pub- lished by any architect. New edition just off towreoh of bunalowar Colonial “hoawes, FREDERICK H. GOWING | pm | from $200 up; gives sizes an ARCHITECT 101 Tremont St., BOSTON, MASS. Sent postnaid for $2.00 ad A BOY’S WORKSHOP Charts, plans, diagrams and pict better if hung with MOORE PUSH-PINS Glass Heads—Steel Points For heavy things, use Moore Push-less Hangers “The Hanger with the Twist’’ 10c pkts. “i’comds is” MOORE PUSH-PIN CO., Philadelphia, Pa. SQUAB BOOK FREE! “¥~ are selling at highest prices ever known Groat 0 years. Make money breeding them No mixire labor, no young to attend. Start small, grow be Read how our customers sell squabs for $12 a ; been established for 23 years Better look in send now, at no cost to you, i il im rat telling how to make money breeding squabs. Address Plumouth Rock Savah Co..€34 HSt.. Melrose Hieh 21 Jewels than 21 Ruby and Sapphire jewels fs py bY for the Burlington masterpiece. Adjust tempera’ ry - 4 % ety $1 y gi monthly payments. Send for free Burlington mn, bees yn Chicago, Iitinols

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Others licago Ae eo ae r xf et na NC BER Add Ma FONDA i YOU CAN TELL IT These AreENUINE DIAMONDS in every way They have the same gor benut? blazing flash and Of tving fire. Stand- ing the terri \e all their experience to see any difference. Prove this yourse Make this Test esx, ra Genuine CO ean tell the difference ~ A it . do not risk a penny as money in full is attached to every ring we seil. SEND E. RICHWINE CO., Send, POPULAR MECHANICS ADVERTISING SECTION Wy Pee Na Nv . WW \ OQ) \ VIS we POETAP Ry GET THIS WONDERFUL RING r nome A GENUINE DIAMOND SEND IT BACK utiful CORODITE Gems match the scintilating Acid Test of direct com Lite time czoerts need f you ‘and your friends back, you won be. out apenny. That’s fair “gh. Lf you keep the ring, price printed here is = pay. Remember COR )DI ro - alone N have same fac Ladies Solitaire 14K Gold Filled > ae Ladies Pierced Fili Pp Ladies Hand Corvee Bi L odien Bridal B Bograve Mens ileavy Belcher 1 14K id es Mens M Hand C perved Nady Gyp Marat Size Gems. Beautiful Hand Carved an of most modern des’ Leather, Silk( Silk sod Velvet Lined Gi SEND NO MONEY nddress and number of gine we et rr: size 4 shown by slip of paper Sting et end to end around fi ngraved un ualified 2 20 year guarantee, t Case Free with ; 7 > ae b nam ger joint and your ring it amount shown eee with postmen. You me by retorn guarentee te retynd your our © binding legal guar Dept. oo *Reniaeteen ist Sole Importers Genuine Corodite Sell Madison “Better-Made” Shirts, Paja- mas, and Nightshirts direct from our factory to wearer. Nationally advertised. Easy tosell. Exclusive patterns. Ex- ceptional values. No experience or capital required. Large steady income assured. Entirely new proposition. WRITE FOR FREE SAMPLES. MADISON SHIRT CO., 603 B’way, N.Y. City Y FREE GOOK NG- WHAT BAITS AND WHEN" Every fisherman should have it. Interest- ing angling hints. Tells what baits to use for every kind of fishing. Postal gets it _ SOUTH BEND BAIT Co. $560 High St., South Bend, Ind, igMone Bi (ae hm This notice is written to interest the man who wants to earn some money and in return for very liberal pay would be willing to introduce to friends and neighbors the finest C. T. A. clothes selling for $19.00, $24.00, $31.50, $33.50 per suit. One man in each, community can earn one of our best suits and in addition $3 to $12 for each order, besides extra cash bonuses, and many beautiful presents, includ- ing $1000 in cash, Ford Sedan, Elgin Watch, Diamond Ring, ete. If you would like a fine suit and will be willing to show samples to at least a few men each week, send me your name and address and I will be glad to send you full details. C. A. Milligan, Manager. ChicagoTailors Association, Dept.598. Sta.C. Chicago You may now have any known musical instrument for a week’s free trial in your own home. Play it as much as you wish. See how easy it is to learn There is no obligation to buy—no expense for the trial. You may return the instrument at the end of a week if you decide not to keep it. Worlitzer instruments are known the world over for un- usual tone quality and excellence of workmanship. They are used by the greatest musicians, bands, and orchestras. Easy Payments If you decide to buy, the Wurlitzer plan makes it easy for you to own the instrument you want. Payments are con veniently arranged in small monthly sums—a few cents a day will pay. Special combination offers on complete outfits — velvet lined case, all accessories, self-instructor, etc.—everything you need at practically the cost of the instrument alone vo Free Catalog The greatest musical catalog ever pub- lished—over 3000 articles—every known instrument described and illustrated many of themshownin full colors. Gives ou lowest prices and all details of the urlitzer plan Send This Coupon ie Rude olph Wurlitzer Co., Dept. Ai77 iy E. t_, Cincinna 9 So. Wabash Ave., Chicago 20 Ww. Sina St., New York 250 Stockton St., San Francisco — me, absolutely free, your new illustrated catalog of musical instruments Also tell me how I may try any instrument in my own home at your enpet ae, and how the Wurlitzer plan makes it easy for me to buy. No obligation (State instrument in which you are interested ) Copyright 1923, The Rudoiph Warlitzer Co

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POPULAR MECHANICS ADVERTISING SECTION ELTAsccs LAMP’ Equip your Bicycle with a Delta Electric Bicyle Lamp and you can rid roads at night picking the bad spots with daylight clearness. There's alw radiant brightness on the road ahead — and red spot in the rear as warnin approaching motorists. There’s nothing to rattle, work loose or wear out. It does stand the gaff; lives the bike, over a million users will substantiate this claim. And it’ everywhere. Uses ordinary dry battery. Fits any bicycle instantly — axle nut front left side. : : Put America’s Best Known and Most Popular Light on your Bike. Ask dealer or sent prepaid, complete for $2.25 (less battery). Standard Makers of Bicycle Lamps, Auto Spotlights, Motorcycle Spolli The Eagle Eye That Spots ox ega DELTA ELECTRIC COMPANY Factory and General Offices: 100 Delta Block, Marion, Ind. Electric Lanterns, Radio Head-Phones, Flashlights and Flashlight Batterie NEW YORK SAN FRANCISCO WINNIPEG Export Dept. Sanford Bros. Bissett & Webb, Lid. ” 30 Water St. 311 Minna St. 126 Lombard Si. Free from Punctures No danger of getting a puncture just when tires leak-proof and from porous condition of the tires. inject Neverleak Tire Fluid into MOTORCYCLE BARGAINS » and you can say good-bye to punc- Save 25% to 65% gh: Ride all season without any trouble. on Slightly used and Rebuilt Motorcycles. Side Look for the yellow,green and white tube. Cycles, Bicycles. Send for Free Bargain Bulletin and 5 28 ° ~ oney essage. In Price 25¢. at all bicycle and repair shops. poms rebuilt and new Sacbinet oaetien. rt —y etc. Buffalo Specialty Company, Facto $10 to ry, on the R: You can have your choice of sizes. Delive free on approval, YY for for 30 DAYS’ reese TRIAL. Bicycles. $ roles, $21.5 up. f desired. Possession use at once 4 = Liberal Easy ct plan. , express id and eaulprment, nt. , low prices. Bend Write today for free Catalog, fac- Bicvele you select. J go ~—— > } tory prices and marve lous payment terms that you can DEP’ experience of gc me wh Make your trouble and MYEROW BROS., RELIABLE pi enoese MAKES 15 Berkeley st. Boston, Mess. Cars, Johnson Motor Wheels, Evans Power OTOR CYCLE Co. cago Avenue, CHICAGO Buffalo, N. Y. | Sest. 627, 2047 We ohins NEVERLEAK TIRE FLUID, “HEALS PUNCTURES ON THE RUN.” Soe

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POPULAR MECHANICS on Gallon of Gasoline with Air Friction Carburetor We guarantee all other cars nearly double present power and flexibility, make hilis on high formerly difficult on low. Kodeis for any car, . tracten, marine or stationary engine. Makes old cars rantees for other cars. r car is not men “ i hare re send names pad model for particulars nur cusrantee on ii SENT ON 30° “DAY’S FREE TRIAL You can irive any car in heaviest traffic without shifting gears. Starts off on high in any weather without priming or heating—no jerking or choking. No more foul spark plugs or carbon in cylinders. No dents ito crank case, Try it 30 days on our guarentee of ence best: not entirely satisfied. No strings to our guarantee. YOU A ETHE JUDGE. Anyone who can handle a — ean attach it. No boring of new holes or AiRFRICTIO SON C SUI Taye bss ite today. 950 Raymond Bldg, 8 Ohio, U.S. A. WHOLESALE PRICES ” SEND FOR OUR BIG FREE BARGAIN BOOK of the best Auto Supplies made! You’d be Q surprised if ou knew our sources and names of manufacturers. EVERYTHING Special made Bodies— Tires— Tubes Batteries — Tools, etc. This book grnctly ilus- trates in colors thousands o mctly We ~whatever you need or want in , Brey article backed by our leew Binding sarantee of ab f pleased customers everywhere. on on the inside « ‘os yee menage nee ———" At at $ 95 ty card or letter brings this boo sure tc A. for Book Special P. NEW YORK AUTO & RADIO SUPPLY CO Washington at Peoria Street Chicago, linois Beautiful Raceabout poy lnstond of Your OLD FORD Choice of Four Colors ; Fiat or the Bullet Nose Rad- iator Shell. Send for 1924 Free Cat- alog of New Auto Acces’ , Bodies and Speed Equipment. Direct from Factory. AMERICAN TOP AND BODY CO., Park Ave. DELPHI, IND. bayad 100 Tacks and Save $25 xt Top or Seat recovering. Chevrolets $7 ar. Side Curtains $6.95 up t $2.50 to $32. Quality and fit the r instruc tions make it easy to apply. Send for campies. Our prices ery at your door. Eastern orders shipped from Ohio. | Auto to Equipment Co., 1117 So. Main St., Los Angeles. Calif. MAKES YOUR BIKE A MOTORCYCLE! Ahigh grade 2% H. P. Pot attachment quickly clamped on ike frame, Speed 4 to 40 miles an t 90 to 125 miles per gallon of gas. Special Low Price Now! Write today r ( ome te Description and Special ces on SHAW Motor Attachments 6S nd the SHAW Complete Motorbicycle. shaw. MANUFACTURING COMPANY SG, Galesburg, Kansas ADVERTISING SECTION —. uan up-to date Auto Ma ERE’S an unusual opportunity! By special arrangement with Rand McNally, we can send you, for a limited period only, any one, or all, of their series of Official Auto Trail Maps, covering every State in the country for only 10c apiece. Absolutely up-to-the-minute maps — give trail signs, hotels, garages, service stations and much other valuable touring informa- tion. In ordering, please be sure to tell the section of country you want to cover and give us address of shop or dealer where you go to have your brakes relined. Order now as this offer is limited. MULTIBESTOS THE BRAKE LINING with the Interlocking Weave HIS is the famous brake lining that laste so long. The lining that is specified as factory equipment by a majority of American car manu- facturers. And the lining that will give you the feeling of absolute security that your brakes will work whenever you need them. MULTIBESTOS COMPANY Dept. P 6, — Mass., U.S.A.

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Camp Cooking a Pleasure Have good “eats” of all kinds, anytime, anywhere you go! The COLEMAN Camp Stove bakes, boils, roasts; fries, broils, toasts. Gives quick action! The only camp stove with all these exclusive COLEMAN features: Built-in Oven; Built-in Wind Baffle; Swing- ing Fuel Tank always connected; Built-in Pressure Tank and Funnel; Quick Hot-Blast Starter that gives fall cooking heat in 2 minutes; Warmin Gabinet th that keeps food hot and heats your tent on chilly da common motor gasoline. Stove Folds up like a su! b-case The COLEMAN Camp Stove is sold by Hardware, Auto Accessory and Sporting Goods Dealers. Write for De- scriptive Literature and name of dealer near you who sells the COLEMAN. AddressCamping Dept. PM-14. THE COLEMAN LAMP COMPANY, Wichita, Kansas Philadelphia Chicage LosAngeles Toronto, Canada “Coleman Camp Stove | al $500. EW (iy iteal Operate a Tire Repair Shop 70,000,000 Tires in use. Ameri- ca’s greatest opportunity for men with small capital. We furnish everything— $100 and up. Easy payments. We train you FREE right at home. Start mak- ing money at once. Write today for Free Book of Opportunity. Haywood Tire Equipment Co. 1344 S.Oakiey,Chicago Do Your PRINTING Cards, labels,

circulars, tags, book, menus, peper. Press, $12. Larger $35. Job P ress $1: 50 up. Save money. Print for others. BIG PROFITS. All easy, rules sent. Write factory TODAY for press catalog, TYPE, cards,paper. THE PRESSCO.D-37,MERIDEN,CONN. | TURE Bay

[SQUARE DEAL GARAGE |

$14,355.00 Profit on 300 Jobs Facts and figures from hundreds of KRW Equipt Shop Records. 9,000,000 Fords Need Repairs Are you getting your share of that business? 5 Completely equips your shop to RE-MANUFACTURE Fords We can furnish entire equipment for cash ¥ or on easy payment plan. Ford Motor 3 Co. recommend these tools. Catalog. K.R. WILSON, 12 Lock St., Buffalo, N. Y. POPULAR MECHANICS ADVERTISING SECTION

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World’s © Best Roofing at Factory Price | Don’t buy Roofing of any kind until you get our big, Free Roof. ing Book, describing full line of Edwards Famous ‘’Tightcots” Galvanized Roofings, Sidings and Ceilings, and our lowest fac. © tory prices. Then see for yourself how much we save you by selling direct and saving you all in-between dealers’ profit EDWARDS Metal Stingies Pe - f-: proof. By our patented “‘Tightcote’’ process, ell aa sides of me sheets are heavily coated with zine— size Sa FREE Ser osdoe Book Now No meres Samples & SHE EDWARDS fare. CO. Fie

Steady Work in a fast growing business wit! Vanderpool Latest Improved Vulcanizer. Made in America Ask for Catalog Vanderpool Co., Dept. GP, Springheld, Ohio 7 F. H. oles, Agent for British Isles 26 Fairfield R Winchester England

n uskrats ‘and < in large numbers SURE w folding,.galvanized Steel Wire Traps them like a fly trap catches 1! for our FREE TRAP offer, bargain catalog of Fishermen's = esa booklet on best lure known for catching all kinds of fish. Agen's Wanted WALTON SUPPLY CO., Dept. 61, ST. LOU!S, “MO.

The QUIKON provides an e: for relining your FORD tr Made in one piece, it can be r stalled without removir mission cover or self-st: arte r Anyone Can Install the Ql IKON No previous experience is necessar ical chaneee or additional ac« reouired. It is built to fit the FX OR D rageman for the ON order from us. Price $3.50. Se» Harrison Auto Products Corp’n 820 Hamilton Street, Harrison, N. J- TRANSMISSION =- LINING for Fords

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POPULAR MECHANICS down a lazy stream A SUMMER afternoon—the fresh clean smell of the woods—and a stream shining like a polished mirror. It’s a perfect “Old Town” ‘the , day. “Old Town Canoes” are so light and easy to handle. They are low in price too. $64 up. From dealer or factory. The new 1924 catalog és beautifully illus- trated. _It shows all models in full colors. Write for your free copy to-day. OLD TOWN CANOE CO. 1466 Middle Street, Old Town, Maine, U.S.A, —, ADVERTISING SECTION SPARK PLUGS WILL BE SOLO THIS VEARS 15S Marvelous new Spark Plug invention. By the “Visible Flash” you see which cylin- ders are firing. BEACON - LITE SPARK PLUGS You see them fire Each explosion is reflected in the Beacon-Lite THEY SELL FAST J. Huebner, Pa.—“Rush 30 dozen Beacon-Lite Plugs. My average, seven sales out of nine calls.” R.W. Phillips, Ont.--“T sold 2 dozen today, 3 dozen yes- terday. Rush 10 dozen,” | | Write Today—Department P CENTRAL PETROLEUM CO. . . = > > : g 3 “ é DRESS UP $3.85 YOUR CAR A seedy looking top epeile CustON MADE its appearance. Get a Lib- y Custom Made Top. It’s fun putting it on; simple direc- is furnished. Save a big labor bill. We are manufacturers tops,side curtains and seat covers,for any make or model Ohio 4 r. Amazing values. Special proposition for Fords, Chev- ets, Dodges and Maxwells. Write today for big money saving catalog. les Liberty Top & Tire Co., Dept. E-7, Cincinnati, Ohio gian “THE BROADWAY””; K-37 is the classiest rt body for Fords in Built of 20 Gauge ated Steel, uphol- 4 n very high grade ww Spanish brown ma- trial. Spring Cushions 5 ne-man top with side curtains. side nickel lever. The at Americ: Lead ed Door on right side of body = 12-gallon gas tank. Adjustable plate Wanted. giass windshield. Send for Descriptive Circular and Price List. MO. Champion n Racingbody Co., Dept. P.M., 7-9 E. 28th St., Chicago, Ill. Wri For Book About the >) 3 H.P.—The Fastest “Light Twin” Designed and built by Ole Evinrude Weighs less than 17 Ibs. per H. P. Gives half more power, much more speed, yet easy to carry. instant starting without spinning. Safe rudder steering. Trouble-proof carburetor. Push button reverse, without danger of tippin boat. The ideal family motor Fits carrying case without taking apart. Write for catalog. ELTO OUTBOARD MOTOR COMPANY Manufacturers’ Home Bidg., Dept. AA, Milwaukee, Wis. ON CLEVELAND, OHIO Small-Compact A LIFE-SAVER * FOR AUTOMOBILISTS | | pata $2. 50 No more stalling on the road miles from the neares nearest garage If your gasoline gives Out on the road, simply hail the first car passing and with this wonderful Gas Siphon Gun secure enough gasoline to proceed. Also indisper . sable for bailing out water in boats. Nothir AG E N Ts 7 ever known before 3ig money for agents Write TODAY | For Territory « like it THE HANDY SPECIALTY CO. 79 Wainut Street Somerville, Mass. You can buy all the materials for a complete home direct from the manufacturer and save four profits on the (= millwork, hardware and labo Here’s your opportunity to avoid high apartment rentals. Build this home yourself. Two men can build it ina week. Our instructions explain every step. Five plans shown in Aladdin catalog. Price includesall lumber cut to fit; highest grade interior wood- work, siding, flooring, windows, doors, glass, paints, hardware, nails, lath, roofing, with complete instructions and drawings. Freight paid to your station. Permanent Homes—NOT PORT- ABLE. Many styles to choose from. Write nearest mill today FREE Money-Saving Aladdin Catalog No. 951. The ALADDIN Co.,, miSuicks Wilmington, North Carolina; Portland, Ore.; Toronto, Ont.

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146 POPULAR MECHANICS Gixaranteeds® ¢ | 99, ™ | Save 25% on Your ' Heating System by Ordering Now! If you're going to build, improve, or remodel, buy now while material is plentiful and low prices prevail. Avoid costly delays, material shortages and high prices. Don't wait until the snow flies to do your planning. Expert Engineers Practical men are waiting here to help you solve your lumbing and heating prob- ems. They will aid you in adding comfort and health in your home at lowest pos- sible expense. See What You Save! ! Some idea of our low prices can be had on the followe ing euaranteed efficient heating systems for an average sized bungalow with five rooms and bath. cy 993 8 =68125 «=—8315 C_} [= = p Sin le Warm alr Perfection uefeetion, Heating Sue regi air me heat- net Water ae ae Ire ‘ warm Fr ing system. eating dete to the last fitting pith square or vous heating System. boilers as wanted. system. Plumbing Systems fF We furnish every needed item to Z completely install guaranteed plumbing systems. The bathroom outfit shown includes bathtub five foot long, white porcelain enameled on the inside, a pattern white tank closet outfit and white por - elain enameled lavatory com itn &. Sa a S70. 00 HARRIS BROTHERS Co. Dept. WC-7 35th and Iron Streets CHICAGO, ILL. ~ p THF Laeal [( ADVERTISING SECTION The balance in easy monthly payments. The famous ro * evel ice aaqeees fora lifetime; stments, including brouiamendépositinschaiseot WRITE 54 new Art uty the maker at lowest prices. Ee afer ~ baker Book of Fine Chain FREE! f=! pre srecwt Green. Beant Styles and our Write acme, Spee Of I know because I was Deaf and had Head Noises over 30 years. My invisible Antiseptic kar D stored my hearing and stopped Head Noises do it for you. They are Tiny Megaphones. Ca seen when warn. Effective when Deafness is by Catarrh or by Perforated, Partially or W! troyed Natural Drums. Easy to put in, easy to | Are “Unseen comforts.” Inexpensive. Writ« and my sworn statement of how I recovered n DEAFNESS IS MISERY la. O. LEONARD, Suite 226, 70 5th Avenue, New York City Are You Old at 40? A very common cause of old age is the disturbed co of an important gland. | big, strong men are not ex from this serious irreg Our plainly written, interest educationa FREE BOOK “Why Many Men — Old at 40” may bring a priceless n you. It tells of a sens by which thousands have relieved this prostat: condition. It tells how sciatica, backaches, foot interrupted sleep, mental depreszion, etc., are so to this gland. Sold for over five years upon a mon¢ if-not-satisfied plan. Do not confuse it with massage, ROLL YOUR OWN CIGARETTES Put tobacco in this nickel plated case —eurved to fit pocket—close lid—out comes tailor made cigaret. Biggest hit in years. #1 25. Watch, Knife, Chain American seven yewel movemer 1t—thin — nickel case — guaranteed time 3 pieces only $8.75. Booklet free. a kee ee Pitts Novelty Sales.Co. 561 W.WashingtonSt . Chicage cation, violet rays, etc. No obligation. Write to 2134 Main St. || The Electro The ids Steubenville Thermal Co. > --"- a Ohio state g ~ | ‘Summer Homein .Maine A gentleman’s estate of 175 acres on the Maine coast, ™ frontage on a lake 9 miles long; master’s house; large | low; caretaker’s house; large garage; barns; private « light and inexhaustible water Gentle s, and every moder! provement. Forty acres very large trees. Golf and 3 clubs only a few minutes away; good markets in the tow The scenery of mountains, lake and ocean is pronou! one of the best five in New England. House and bunga both completely furnished; steam heat. Place will be sold at a great bargain as owner can no longer use it. Address OWNER 206 East Ontario Street CHICAGO, ILL. aw

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iene Famous Phonogya Only 69¢ for ist Record, Next 4 Record Only ic any six or more records from list below. Av Id at this amazing low price? want nd no money when he delivers the records 7 y way inferior to 75c or $1.00 records return them an t t act quickly before this great advertising offer is withdrawn. RADIEX CLUB Office PM 866 ORDER FROM THIS LIST—10 DAYS’ TRIAL SEND NO MONEY erage cost only 35c each. I ever heard of brand-new, double face, 10-inch records, all the very latest b Radiex Records play beautifully « Send gee ard or letter civing catalog numbers of any six or more oo Simply pay the postman 35 cents "pal recc ord Try_the records 10 days and if yc m any u find get your money 596 Columbia Road Boston, Mass. . : STANDARD POPULAR SONGS POPULAR DANCES : aad 401 Dream Daddy 2137 = Linger Awhile 4 in Solos) s Sunshine of Virginia Momma 1198 : & 1 Were Smile Will Go Long Dream Daddy laggie 4011 = Long Way 2136 Bit by Bit 1195 ky Home It's A Man Every Time I Love You 8 Mr. Radio Man cemnety o Wrong me 1187 The One I Love 2142 stéin_ in s Corner California Here I Come — oS a. tie 66 Sol Took the $50,000 2141 ky lh nes So. 1 Linger Awhile 2135 Sitting Pretty in a Old Time If the Rest of the World Pretty Cit ‘ 2 Don't Want You Irish Jigs and Reels, = sl Quartette) Sittin’ In A Corner No 4016 alley @0r7 ¥0U Didn't Want 2927 Irigh Jigs and Reels, — Me Juartette Ss B ? ot ette) Last Night on the cote Bagpipe 7001 4022 _ Back Porch 2126 Scotch Regimental es, Band) Every Night I Cry Marches A fine watch FREE ! or Beautiful Pearl Necklace or First-class Radio Set Anyone—boy or girl, man or woman—can have any of these guaranteed articles. Only a few hours of your spare time required. Anyone can do it Write immediately for full information and illustrated catalog. No money required. a THE CHARLES E. HIRES CO. 222 S. 24th Street, Philadelphia, Pa. POPULAR MECHANICS ADVERTISING SECTION On with the Dance— Here’s Real Music! Why run out to a cabaret every time you want to dance? There’s many an evening’s fun right at home—provided there’s good music. And there’s always good music where there’s a Hohner Harmonica— The World’s Best If you want to be a popular host, be ready with your Hohner at impromptu parties, after dinner dances and social gatherings. Produce your pocket orchestra, announce a good fox trot or one step, and surprise your guests with some real snappy harmony. Get a Hohner Harmonica today and play it tonight. 50c up at ail dealers. Ask for the Free Instruction Book. If your dealer is out of copies, write M. Hohner, Inc., Dept. 181, New York City. OHNER ARMONICAS AGENTS Whur WE START. Uy Famous Carnation Products—Creams, WITHOUT A DOLLAR Perfumes, Toilet Goods, Household necessities. Widely known line; 200 items, 1004 profit, repeat orders enor- mous. Wegive agents big concessions. Experience unnec essary, Writetoday. Carnation Co.144 St. Louis, Mo. Walk Away NLY a speed boat can catch you! Exclusive Kennebec design gives the utmost speed consistent with safety. Equipped with Sponsons is #505 fi rugged and low priced. The only canoe gi Send for Free Catalog with 15 latest 1924 models of canoes and row- ts at special prices. Askfordealer’s name. Z Kennebec Boat & Canoe Co. Dept. M53, Waterville, Me. PEL ECT EL = we utely non-sinkable, even with motor attached, and perfectly safe in very rough water. Ideal for trolling, perfectly balanced. Light, steady, years. Without Sponsons 86. KENNEBEC CANOES With Sponsons $108.00 from'‘Em’ All in a Kennebec Outboard -00 and up. ‘86...

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POPULAR MECHANICS ADVERTISING SECTION MAKE MONEY—SELL RADIO! tadio offers the biggest money-making opportunity on earth today. And the Ozarka Plan opens the door to this big opportunity. Look at the picture of this beautiful Radio Receiver. This picture was made from an actual photograph. By the Ozarka Plan that Radio Instrument can be the product of your own making — easily, simply and andy. It will be yours to make, to sell and to reap a rich reward in cash profits. No experience necessary. You need not have much cash. All you need is spare time, determination and action. If you're that kind of a chap, the Ozarka Plan will start you on a straight line toward a real monev- making business of your own. It can be as big and as profit- able as you are ambitious to make it. We want good men in every,county. Exclusive territory is going fast. Be sure and give us the name of your county. Write to- day for the Ozarka Plan. A wonderfully interesting book, of facts, particulars and proofs. It is FREE. Act now. OZARKA, INC. 851 Washington Bivd. CHICAGO “No, Jim — Pve stopped smoking. Gained six pounds in a week. You know howl used to smoke— a pack- age of cigarettes and a cigar or two a day—-it sure had some hold on me. But I'm cured— took a scientific home tobacco treatment fixed me up in two weeks, “Wasn't hard on me at all—noticed improvement the -frst day—lI feel like a new man. It didn’t interfere with my work—didn't leave any druggish after- effects—the money I saved in the last two weeks has paid for the treatment alone. “Why don't you take it? It has cured men like you and me for over forty years — it is a doctor’s individual prescription that sure fixes you up. Just send the cou- cloris 0°” for full information NOW. No obli- : « gation, All correspondence is strictly Prescription confidential.”” The Keeley Institute, Dwight, Ill. Please send me, without any obligation on my part your free booklet which will tell me how to rid myself of the tobacco habit. TETTRTTIO TITTLE TOWN. sec ccccce ccccecccessssseseeesseesesessesagese Street..ccccccccs State.....+-+00 P.M.-6 RES. SE RS SRE EL NS TRE 6 RTE PONE TEAR Make $2.50 an Hour YOUR PROFITS IN ADVANCE STAY-PREST TROUSER PRESSER sells quick—every- where. Thousands in use. Sales- men and saleswomen cleaning up. Sells on eight-minute dem- onstration. Reasonable pri 40% clear profit for you. take orders. We deliver. Wonderful New Invention Puts perfect crease in trousers Takes out wrinkles and baggy knees. Easy to use—takes less than ao minute. Folds into small size. Finely finished. Looks rich. Saves clothes and tailor bills. Every man wants one or two Make Big Profits—Others Do Jack Ames made $24.00 in four hours Randle sold twenty-five the first day Mary Roberts made $10.00 in one eve ning. Others making good in full or spare time. So can you. Four Patents FREE Write us quick for free sample offer and full The Getgey-Jung Co..Dept. 216 G.&J. Bldg.Cincinna:i,0. AGENTS WANTED! Salesmen — Distributors to use and introduce attachment that makes Fords run on 94% air. THER- MOSTAT on exhaust automatically turns down needle valve as engine warms, exactly as Ford Manual says do by hand. BLANCKE AUTO THERMO An Automatic Carburetor Control Makes Fords start easier winter or summer —saves half gas and oil—cuts repair bills one-half—reduces carbon formation one- halt. Sells on sight to every Ford owner as easily as giving him a $100 00 bill, be- cause it saves $100.00 every 10,000 miles CADILLAC NOW USES AS STANDARD EQUIPMENT THERMOSTATIC CAR- BURETOR CONTROL UNDER BLANCKE LICENSE. Youcan: Big Money. seiling this wonderful proven device. Experi: necessary. ancke plan will start you without capital in a business of that makes you from $250 to $2000 a month profit. Write for free cir A. C. BLANCKE & CO, > 558,007 ints," LYON BODIES Send For Our 1924 BOOK OF BARGAINS Containing a full bodies and accessori: exceptiona prices. Buy direct from the factory. AUTO TIRE SALES CO. SSS . Body Division Depi. P21 1346 S. Michigan Ave., Chicag SEND NO MONEY Fete ccc] filling Fountain —_ Pen, with 14 Karat gold pen point . — including your name en- grave free on barrel in gold letters, Former sold for $3, n« offered at the & j 75 introductory price of ' including engraving of your name. Pay post $1.75 and postage on arrival, or send payment nov order and get pen postage prepd. Money back if not satisfied es B. |. BRITMOR CO., 286-5th Avenue, NEW YORK Balance Only $5 Monthly Save 35 to 60% on all standard makes— Underwood, Royal, Remington, etc. Every machine thoroughly rebuilt and a) GUARANTEED. Try five days at our wee expense before you buy. Sena WRITE at once for Free 5 Reyueeeemy Descriptive Circular and @U\ ge) ——= Special Low Prices. |WYNN TYPEWRITER EXCHANGE 23.'s%" *c: 1.F. GR)

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POPULAR MECHANICS ADVERTISING SECTION suiny TET AP How Did Your Garters Look This Morning? To wait until you must have a pair of “Bostons” is to court danger. To feel well dressed always your garters must be fresh. Amazing New Invention! cook, Bake without Coal or Wood Pace & © x kerosene burner in your coal or wood stove and ting or cooking problems. Just turn a valve and get st instantly. No ashes, no dirt, | wood or coal to carry, no fires to ary AGENTS i, no waste of fuel. Cooks and wie 1an the old way. t geiter over a red hot stove 4 summer. Installed with- » | » stove; a child - ily set in fire box; smoke, no odor. a0 THE CHEAPEST and CLEANEST FUEL in l) ia cheapest In the is r nt it can be turned on wo without waste, and sfactory than coal or - ick beat in the win- A ick heat in the wir We Want User Agent oe To one person in each neighborhood, we 2 “Ss will sell the Simplex Barner at the low- | A or y est wholesale price, and will pay liberally . wes a TEN DAY TRIAL. +. part time or steady work. $1.00 to Y WIDEWEB fe part rs will be given $3.00 per hour can casily be made in Oa ly. Address evenings and spare time. Py

uara s wonderful new in- good - oo LD vat way and prove all oe MPLEX UTILITIES MFG, CO., $ioSn"cutast: Chicago —

2 —_— a Sanaa YUVAMMLUGLLLII With Pleasure! CLEVELAND Motorcycle. Enjoy yourself dur- leisure hours. Use it tofland from work. 1 Hider Agent for us, if your territory is open. commissions on sales to others. Write for d Rider Agent Plan. CLEVELAND MOTORCYCLE MFG. CO. 7213 Platt Ave. Cleveland, U.S.A, GEORGE FROST COMPANY, BOSTON MAKERS OF VELVET GRIP HOSE SUPPORTERS FOR ALL THE FAMILY HoH PET Sell Caps!! You'll make more money selling TAYLOR 2x MADE-TO-MEASURE CAP Call at offices, factories, golf links and garages. man a live prospect.

Eels, Mink, Muskrats and many other fur-bearing animals, in : large numbers, with my New, folding, Galvanized Wire Mesh Traps. They catch them t fiy-trap catches flies. Made in all sizes. Strong and ttrable. Write today for Price List, and my Special FREE Ofer on best baits known fer attracting fish and animals. L.F.GREGORY, Dept.102, Lebanon, Mo., U.S.A. RAISE BELGIAN HARES New Zeeland Reds — Flemish Giants — FOR US—BIG PROFITS—WE SUPPLY PAY $2 TO Also other Every “9 out of 10 men will order.’ Your customer selects style and fabric—the cap is tai- lored to his individual measurements. Moderate price to him—good commission paid to you in advance. Write for Sample Outfit and FREE Cap offer today. Act quick! TAYLOR CAP MANUFACTURERS CINCINNATI, OHIO

r Expo WATCH —I—_ RACING BODIES for FORDS at $34 oes or selling the nove po . 8 oes . : Cash Commissions CAMERA among your friends. Sells Send today for free par lakes sharp, clear photos yet is so small you car hide ilm of your hand. Low price. Local and state ageni terri- E. 13 St., ticulars. Our book “HOW TO BUILD A FORD RACER” sent anywhere on receipt of 25 cents—cash or stamp.

Agents Wanted CENTRAL AUTO SUPPLY CO., Dept. 120A, LOUISVILLE, KY. Sells for $1.25 —Agent’s Sample 65c! SCREW CAP New ary hy Self-Filling Bamboo Fountain Pen with Expo Camera Co., ¥f ¥ tis:

PEN RETAINER FITS INTO BARREL HT P TING TWISTING UF ——

hy — —<—<—<—<—————— | eh / \ ; ITS THE POINT, Stylo Point Imported from Japan. “It makes Carbon Copies.’”” Guaranteed for One Year. Hustlers Make $20.0) Daily! lone y retunded if you don’t think it the best pen you ever wrote with. Just Out! Comes in beautiful brown, trimmed in black. Send orquantity price list and distributing plans F. SPORS & COMPANY, 335 Main Street, LESUEUR CENTER, MINNESOTA HAS EIGHT GROOVES FOR INK TO FEED

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POPULAR MECHANICS ADVERTISING SECTION JE TRADE MARKS PROTECT ANY NEW article, machine, design or improvement thereof, or any combination of parts or improvements in any known article which increases its efficiency or useful- ness, may be patented, if it involves invention. IF YOU HAVE ANY NEW IDEAS which you feel are useful, practical and novel, take prompt action to protect your rights. I{ yo ve a inventedany new machine, ornew combination of parts or improvement, or any newdesignor process, SENDP@ Stal DRAWING, MODEL OR DESCRIPTION of it for information as to procedure to secure protection. 7§ fy!! co! ee ean ener penne aente — SD eres renee DRAFTING and SPECIFICATION ROOM of CLARENCE A. O'BRIEN, Registered Patent Attorney, Washington, D.C. All Communications 20.0105) 5 ore careful and thorough attention is given to h BLA! case. I offer you efficient, reliable and prompt service—based upon practical experience. Highest references. NO CHARGE FOR ABOVE INFORMATION Clarence A.O Brien}: Invent 10 REGISTERED PATENT ATTORNEY Member of Court of Appeals, District of Columbia, United States Court of Claims; F Barof / Supreme Court of United States, Supreme Court, District of Columbia Practice Confined to Patents, Trade Marks and Copyrights CO we

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POPULAR MECHANICS ADVERTISING SECTION 151 COPYRIGHTS _ S YOUR IDEAS WRITE TODAY FOR FREE BOOK, “How to Obtain a Patent” This book will give you valuable information, and it may save you much time and effort. Send for it, NOW. My practice is devoted exclusively to United States and Foreign Patents and Trade Marks. Write me freely, frankly and with full confidence; it is very probable that I can help you. 7 oe Ae ee ee ee : United States Patent om ce as Viewed trom My Office, Directly ACROSS THE STREET mck e435" “RECORD OF INVENTION” SE THE COUPON attached, and immediately upon its receipt I shall send you this form +o b to me with drawing, description or model of your idea; promptly upon receiving your ‘dea I te you as to procedure and costs. ni CLARENCE A, ©’ BRIEN, Patent Attorney, 703 Security Savings & Com’! Bank Bidg.- Dp nces. Directly Across Street from Patent Office WASHINGTON, D. C. Nae ise send me your free booklet, ‘‘How to Obtain a Patent,”’ and biank-form, ‘‘Record of Avention,’’ without any obligation on my part ims; | nbia a en . nia IMPORTANT: Write or print name clearly

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152 POPULAR MECHANICS ADVERTISING SECTION » HA\ havi BS early us $. OUR OFFER: No Charge for Examination and Instructions HAVE YOU AN IDEA? Your First Step before disclosing an invention, the inventor should write for our blank form, “RECORD OF INVENTION”? This should be signed and witnessed and returred to 7 us together with model or sketch and descriptioa of the invention for examination and instruction and to establish Evidence of Conception. No charge for the above information. Our Three Books Mailed Free} to Inventors Our Illustrated Guide BOOK. HOW TO OBTAIN A PATENT Contains full instructions regarding U. S. Patents. Our ; Methods, Terms, and 100 Mechanical Movements illustrated pe and described. Articles on Assignment or SALE OF PAT- he fiel ENTS, Patent Practice and Procedure, and Law Points for} ‘or any inventors. | inventic OUR TRADE MARK BOOK =| °°" Shows the value and necessity of Trade-Mark Protection and f pate: gives information regarding Trade-Marks and unfair competition® lected in trade. certain OUR FOREIGN BOOK Parse. . . ° ° , , ion re] We have Direct Agencies in all Foreign Countries. We secureF Radio « Foreign Patents in shortest time and lowest cost. We Regard a Satisfied Client as our best advertisement, and will furnish , to anyone, upon request, lists of clients in any state for whom we havef F secured patents. CC Highest References—Prompt Attention— Reasonable Terms ‘nae VICTOR J. EVANS & CO.) PATENT ATTORNEYS Main Offices: 956 9th Street, N. W., WASHINGTON, D. C.) a Opposite U. S. Patent Office ;-- aaa — = on a aS ar re

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filing date in Patent Office. early iT O! Specialization—Our Staff trated By ~ PAT- the held of invention is so vast that it is impossible ts for ‘orany one man to become an expert in all classes of vention. Only those skilled in the class to which K the invention relates are capable of rendering efh- ent service. For this reason we employ a number nm and® ° patent lawyers and draftsmen, who have been etition® ‘lected for their special knowledge and ability in ertain lines of invention. Each case is placed in harge of an expert in the class to which the inven- Btn relates. Latest addition to our staff being a secure & )Radio Specialist. rnish® have® 7 4 COUPON NEW YORK OFFICES is 7 Woolworth Bldg. PITTSBURGH OFFICES 514 Empire Bldg. Gentlemen: preceding page. —_ 0.) . Ce POPULAR MECHANICS ADVERTISING SECTION >) HAVE YOUR CASE MADE SPECIAL to Avoid DELAY. Take the precaution of having your case made SPECIAL in our office to save correspondence and secure To secure SPECIAL preparation of your case send > us $25.00 with model or sketch and description. FREE] VICTOR J.EVANS & CO. | PATENT ATTORNEYS MAIN OFFICES: 956 9th Street, N.W., WASHINGTON, D.C. Please send me Free of Charge your books as described on 153 A ff + L - ’ ~ ; SS. "MAIN OFFICE, VICTOR J. EVANS & CO.—VICTOR BUILDING, WASHINGTON, D. C. OUR ORGANIZATION OFFERS PERSONAL SERVICE by registered and practical attorneys and draftsmen of long and varied experience, who will give your patent business special attention, the whole being under the supervision of Victor J. Evans. INFRINGEMENT AND INTERFERENCE SUITS PROSECUTED All communications and data strictly confidential CHICAGO OFFICES PHILADELPHIA OFFICES 1114 Tacoma Bldg. 714-715 Liberty Bide. SAN FRANCISCO OFFICES Hobart Bldg. {dd lress ail

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154 POPULAR MECHANICS ADVERTISING SECTION

PATENTS Seventy-eight Years of Practice HE firm of Munn & Company filed its first application for a patent in 1846, and for seventy- eight years has endeavored to keep pace with the inventive genius of the United States. An experience of many years is at your disposal. If you have an in- vention which you wish to patent, send yoursketches or model together with a description of your device, explaining its operation,and you will receive prompt, courteous attention. Write for our Handbook on PATENTS A full and complete booklet on Pat- ents, Designs, Trade-Marks, Foreign Patents, Copyrights, Labels and Patent Office Practice with an explanation about our methods, terms, etc. All communications strictly confidential. v Keep in touch with the inventions of the world by reading SCIENTIFIC AMERICAN The MONTHLY MAGAZINE with a special appeal to every man of in- ventive genius. Recent rulings of the Patent Office, descriptions of the latest patented inventions, legisla- tion and court decisions affecting patents, are noted in this authorita- tive publication. MUNN & COMPANY Patent Attorneys 618 Woolworth Building, New York Scientifi¢é American Bldg., Washington, D. C. Tower Blidg., Chicago, Ill. Hobart Bldg., 582 Market St., San Francisco, Cal. Van Nuys Building, Los Angeles, Calif.

U.S., Ww? get , — Tipe CEND FOR <9 Su a THIS FORM DON’T LOSE YOUR RIGHTS TO PATENT PROTECTION Before disclosing your invention to anyone gend 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 inventors all over the United States and Canada in the ad- vVancement 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 TRADE MARKS LANCASTER <ge 8 ALLWINE 480 Ouray Bidg. Washington, D. C. Originators of forms “Evidence of Conception.” PATENTS

BLUE BOOK ON PATENT gives instructive information and candid advice. MONROE E. MILLER, PATENT LAWYE 411-2 Ouray Building ELECTRICAL AND MECHANIC AL EXPER

RADEMARKS $35 Design Patents $35; Copyrights $5; Booklet Free; 20 years’ experienc: HINGTON, D. ©.

SANDERS, Te Se = CHICAGO”

Bates pat- yon we Grae ip at lowest Eonsistent charge, & by many wel! known PATENTS = Puteri of nent velue. gy Patent-Sense, free &lacey, 646 St., Wash., D.C, Estab. 1 869. PATENTS REGISTERED PATENT ATTORNEY SINCE 1905S a SHARLES W LOVETT SQ 8106 NN MASS

Have You An eebiiinn? If so the WORLD PROGRESS will show you how PROTECT AND PROFIT FROM YOUR IDEAS Sample copy free. One year’s subscription $1.00 Send for free book, “WHAT TO INVENT” containing SUGGESTIONS TO INVENTORS as to In tions Needed. We invite manufacturers to addre: regarding inventions they want. WORLD PROGRESS PUB. CO., Inc. Room 203 Victor Bidg. WASHINGTON, D. ©.

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CAGO, ye st 7 e. n? DEAS $1.00. Inve lres: N, D.C. + Fahne POPULAR 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 Building, Washington, D. C. 2276-E Woolworth Bldg., New York City Patent Litigation Trade Marks PATENTS == Handbook of instructions, “‘ How to Protect Inventions,” sent free on request R. H. FRAVEL, Patent Lawyer Formerly of the U. S. Patent Office Examining Corps C. L. PARKER Room 1503, McLachlen Bldg., WASHINGTON, D. C. PATENT LAWYER MCGILL BLOG PATENTS 2227253 Patents, Trade Marks, Copyrights, Patent Litigation Handbook for Inventors, * * Protecting, Exploiting and Selling inventions,” sent free upon request. IMPORTANT PATENTS secon: MASON, FENWICK & LAWRENCE Patent and Trade Mark Lawyers WASHINGTON, D.C., NEW YORK AND CHICAGO Established over sixty years Highest references PROTECT MECHANICS ADVERTISING SECTION Learn to Make BIG MONEY As an Inventor Amazing new home - study course now teaches you inven- tive science in your spare time; shows how to develop, patent, sell your ideas; how to make big money from inventions. Famous Inventors Now Teach You! Invention is not a matter of luck. Edison says, “ Invention is a science, and should be taught as a profession." Suppose you went home tonight and Raymond F. Yates, found a window rattling. Almost who with fourteen instinctively you would stop the rattle other famous inven- with a wedge. That instinct is the tors, now makes it germ of your inventive ability, and easy for you to learn how to invent in your spare time at home. you can develop it so strongly that in a remarkably short time you will think and act inventively. Every in- vention is based on exactly the same principles that you use to“ fix"’ the rattling window—first tosee a prablem, and then to find some fact which solves that problem And now, for the first time, 15 famous inventors teach you how to acquire these simple, easily learned principles of invention A Fortune for One Little Idea Even so small an idea as a new kitchen knife can bring you thousands of dollars. Waterman, the inventor of the fountain pen, became a millionaire The inventors of the metal-tip shoelace, the “humped"’ hairpin, the metal tape measure, the paper-match holder, have all received thousands of dollars for just one idea. It doesn't matter who you are, where you live, what you do—every day you meet problems which suggest ideas for money-making inventions Learn How to Invent at Home If you have ever had an idea for an invention, or if you would like to become a spare-time or professional inventor, see what this fascinating new course can do for you. Fifteen famous inventors now teach you at home the secrets of invention show you how to get the information you want, how to perfect your ideas quickly, what to invent, and (just as important what not toinvent. You also learn how to avoid the mistakes which cost many inventors thousands and thousands of dollars This complete course teaches you everything you want to know—how to get a patent, how to protect your patent rights how to dispose of your invention to get the greatest possible profits, and hundreds of other facts about invention worth a fortune to you. FREE BOOK On Inventive Science A wonderful book explaining this fascinating course will be sent to you free. It explains the course in detail, and proves that you can easily train your mind to think inventively so you may become a successful inventor It shows how this course gives you, in a short time, a wealth of information which other inventors learned only after years of hard work and bitter experience. Get the advice of these fifteen famous inventors Send for this book today. There is no cost or obligation. This bureau is not connected with patent attorneys or manu- facturers. Our only work is to teach you how to develop yout ideas so they will bring you big money BUREAU OF INVENTIVE SCIENCE Dept. 36, Wisner Bidg. ROCHESTER, N. Y | PATENTS Send us sketch or model for patentability opinion and exact cost of patent. Our book “‘How to Obtain a Patent,”’ Sent Free on request. It sells > how to apply for Patents, Trade Marks, Foreign Patents, Copyrights, etce.; gives information on Patent Procedure; tells what every inventor should know. Thousands of In- vertors, who are our clients, are our references. Chandlee & Chandlee, 25 Years’ Experience. £55 ith ft. Washington, D, C.J Seeeeece BUREAU OF INVENTIVE SCIENCE, Dept. 36, Wisner Building, Rochester, N. Y. Please send me without cost or obligation your free book * Science of Invention." ‘The PEREED. cc ck cccvccsceses , : ee

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156 POPULAR MECHANICS ADVERTISING SECTION [PATENTS Booklet Free Highest References Promptness Assured Best Results Send drawing or model for preliminary examination ALL BUSINESS GIVEN PROMPT AND PROPER ATTENTION WATSGN E. COLEMAN, Patent Lawyer, 644G St., Washington, D. C. $ . rear nants ENTS Litigation | Write for advice and instructions how to proceed, t so f costs, etc. Hand Book with illustrations of 100 Mechan- F ical Movements sent free on request. ALBERT E. DIETERICH Patent Lawyer and Solicitor Successor to Fred G . Dieterich & Co.621A Ouray Bidg., Washington,D.C. ————— —— aed met i Bel spe stri 18 years’ extensive experience in developing : mo and perfecting inventions; making drawings incl and working models for demonstration. Exe da port engineering advice free on all matters ; y ‘ore or - atent. Strictly confidential, } Ma erences on request Bexvano & HELLER, 27 B Water SN , A thir 7 finc you : bre: Your x . nor SELL US A PRACTICAL IDEA ef some new and useful WAY to atilize Pressed Metal in place of other meteria The _unders' d cash for every tion epproved by our Engines: ASvicery Board. Free beok gives you facts. PRESSED METAL iitson COUNCIL Pern ~~ . 27 QUINCY STREET, SUITE 1705, CHICAGO skin can bef § co quickly clearedof | : mples Biackheads, |} © .,. can build Eruptions , the i pre: face ‘or bod argedPores,§§ © |... ody at PARTS Oily or Shiny eae $1,000.00 Cod f | aroha $6.15 Cash says § can clear your skin of the F — afacturers and our quantity production enables us to above blemishes. WRITE TODAY for my FREE 4 alsc quote exceptional low prices. Our unique shipping methods Booklet—""A Clear-Tone Skin” lens save you 73% in FREIGHT CHARGES. Send at once for free partic- —telling how I cured myself after ; % | ulers on Central Bodies. Our Book: “HOW TO BUILD & FORD RACER” being afiticted forfifteenyesr= | i seat anywhere on receipt of 25¢ im cash or stamps. WRITE TODAY! 4 ‘ty.Mo. 1 1 — Central Aute $ Co. 10 §©Leuis Ky. .S.GIVENS, 129 Chemical Bidg., Kansas City, 2 q INVENTORS votes || Send for our Guide Book, HOW TO GET A PATENT, and Evidence of Invention Blank, sent Free on request. Tells our terrns, methods, etc. Send model or sketch and description of sasenassecee your invention for our Examination and Instructions without charge. NAME - teens RANDOLPH & CO. i °°=————_— 300 Victor Bldg., WASHINGTON, D.C. 2 civ - a

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POPULAR MECHANICS ADVERTISING SECTION 157 New Self-Massaging Belt _ Reduces Wais t—Easily | Produces same results as an expert masseur, but far Substitutes good, solid, normal tissue for that bulky, useless, disfiguring fat, yet does it so gently that you hardly know it is there. quicker, easier and less expensive. Science has found a delightfully easy way to quickly remove fat and obtain a normal waistline—without straining your heart with violent gymnastics or weakening your system by starving. Formerly those who wished to reduce without dieting or strenuous exercise had to go to a professional masseur. His method effectively dislodged the fat and brought about the desired reduction. But it was expensive and time-consuming, and so few could take advantage of it. Remarkable New Invention Put now a wonderful new invention brings this same effective method within the reach of all. The Weil Scientific Reducing Belt uses this same massage principle, acting by means of its specially prepared and scientifically fitted rubber. It is so con- structed that as you wear it, every breath you take and every movement you make imparts a constant gentle massage to every inch of the abdomen. Working for you this way every second, day and night, it reduces much more rapidly than ordinary massage, saving both time and money. Actually Removes Fat It does not merely draw in your waist and make you appear thinner. It actually takes off the fat. Within a few weeks you find 4 to 6 inches gone from your waistline. At the same time all your stomach disorders, constipation, backaches and shortness of breath disappear as the sagging internal organs are put back in normal place. Man or woman, you are filled with a wonderful new energy, and both look and feel 10 to 15 years younger. The Weil Belt is used by hundreds of professional athletes and jockeys because it not only reduces quickly but at the same time preserves their strength. Highly endorsed for its healthful prin- ciples by physicians everywhere. Satisfaction guaranteed or your money back without question. Write today for full description. If you write at once you can also get in on a Special Reduced Price Offer being made for a limited time. Mail coupon today to THE WEIL COMPANY, % Hill Street, New Haven, Conn.

ey As shown above, every move of your body walking, climb- ing stairs — merely breathing as you sit —causes the Weil Belt to massage your abdomen. Itis working for you every second. lthe Weil Company, l 96 Hill Street, New Haven, Conn Gentlemen: Please send me, without obligation, ] complete description of the Wet! Scientific Redue- ing Belt and also your Special 10-day Reduced Price Offer. { Name ON oes pe ante dvanare @ CRF. cccccccccccccessccocs State

California Bathing Beauty pao et handled pocket knives t. You will want one when

<P jae ~ our py : oe Tinea quality. Ty jon guar- ~~ offer oils hs how to veoun coent one tae Cash Commission Me, te us today. . R, LOS ANGELES, CALIF.

New ee or now makes fron- ey tay = Ly in ha aif. "See Saves, b cent for 3 hours use. No ments. Nocords. Notubes. = regulated heat. Guaranteed. lis fast. Mrs. LT Ohio, pb < oak te in ok. Y do made $164 one wee ou can as woh "We 3 = or No experience needed. No tan, Simply take orders. We deliver and col- ns paid same da u take orders. Send for exclusive toveiery and FREE oO T OFFER. Write today. THE AKRON LAMP CO., 36 Iron St., AKRON, @HIO

Conns most pleasure and quickest opportunity for profit because they are easiest to play— in tone — perfect in scale—hand- some in d-sign and finish. Send for Free Bock, ““Successin Music

wee FREE beautiful and How to Win It”’ by John Philip Sousa and others — and details of Free Trial, Easy Payment plan on any Conn instrument. Men- tion instrument. Cc. C. CONN, Led. 631 Conn Bidg. Elkhart, Ind.

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158 POPULAR MECHANICS ADVERTISING SECTION A NEW WAY to Wear Your PANTS The Up-to-Date Way To Keep Them Up! The day of the suspender and bel! has passed. Men who use toswea! at wrinkly, buckling trousers and “hunched -up” shirts, are now swearing by INVISO. INVISO not only keeps trousers and underweat up, but also keeps your shirt down and does it easily, comfortably, and with perfect surety of an always neat and stylish appearance. No more floundering about on a hot summer's day constantly “‘pulling in” belt or readjusting suspenders Here is SURE RELIEF! Physicians recommend INVISO as a health belt. By clever arrange ment of elastic in sides and back, it conforms to every body movement without pressure or binding, Easy to put on. Cool, sanitary, durable, 50 TRIAL FREE ROUSER $ OPP UPPORT rake advantage of our Trial Offer. Send no money. Simply forward your messu-ement (measure just above hips and under the trousers) and deposit $1.50 plus mailing cost. with postman upon receipt of yeur INVISO. Wear it for ten days. If unsatis- iactory return at our expense and we will refund your money. HIP-FIT COMPANY 12 East 44th St. New York City AGENTS WANTED Write for interesting particulars and money- making proposition for your territory. => ALL BAN INSTRUMENTS AT i MAKES V3 toV2 DRICE ! : All famous American and imported instruments for band, orchestra or solo offered at astonishingly low prices. Hundreds of bargains in new list. New GQuar- antee. 5 Days’ Free Trial and money back guaranteed. Buescher, Boston Silver plated gold bell Cornet, in case, pearl keys. Slightly used, completely rebuilt, guaranteed new condi- list. ‘Our price... 91 1499 new condition SAXO- PHONES, offered with case, reeds, strap, pear! keys Completely rebuilt fe / and replated—get our bar- gain list for oe 889” and DEAGAN XYLOPHONE $15 list, 2% oo- taves, slightly used rebuilt guaranteed likenew.Our Drice SPECIAL! waste time and mone: WEE leawas : . or 21 years as bargain Goadquarters. Send for latest bargain list TODAY! Dixie Music Hous, Dep!. 501, 320 S. Wabash Ave... RIDE 30-Daus FREE P Hf On the dandy new wheel all the boys are talking about! A bike that will make you the envy of all the other fellows. It’s a knock- out, boys, with racy lines, auto- type headlight, finger-fitting grips, motorbike handlebars. Just everything you could look for. Of course it’sa BIACK- BEAUTY BICYCLE The easiest riding, most substantial and finest ey wheel made. Shipped express prepaid, direct from the factory—at wholesale price. Guar- anteed 5 years. 6 months’ insurance against accident. 30 days’ trial. Large selection of models and colors. 4 Tires, Lamps, Horns, Supplies ete. Everything for the bike at wholesale prices. 1924 Black Beauty nd for Gna isrnee HAVERFORD CYCLE CO. of PA, Established 28 years Dept. 376 PHILADELPHIA, PA. Be a Black Beauty Rider Agent Send for our free lesson, which shows | how easily you can master Drafting by the Chicago “Tech” Method and prepare for a high salaried job | 1 | e ee BR er mail under the direction of our ex rts. The fees are moderate,the termseeasy | Pind out about this now. The lesson ts free and we send our catalog with it. Write today CHICAGO TECHNICAL COLLEGE 630-A CHICA GO “ TECH” BUILDING, - CHICAGO, ILLINOIS | = CLEANS WINDOWS INA Cleans thoroughly with less effort rhe chemicalized pad loosens the dirt, the t ~”' ber wiper dries and polishes. Saves , Of labor and does not muss or splash w Ideal for homes, stores, shops, hotels etc. Sent post paid for $2. Satisfaction or! back. Agents, Dealers, write for prices international Specialties Co., Polson Bidg., Sealtie, Ws IF The Lightning Clearer & | t [ STA. A RIE, PA & Fain’50O a day- Fe As “yr: ° ° 7 Lighting Fixtures READY TO HANG (Direct from Manufacturer) Completely wired, including glassware Send for Catalogue No. 26. Just Off the Press Special proposition to DEALERS ERIE FIXTURE SUPPLY co. Y Goodyear Raincoats $1.75 each, in dozen or gross lots. Sample sent upon receipt of $2.00. Agents anted (Write for our Money Making Catalogue.) GOODYEAR RUBBER M’F'G co. Dept. A. 34 East 9th Street, New York City 4 Cy open “ee = >! ee E oJ OS Ts bee iT ™

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are ress PA ee oa | ts le .) ee nan a NEAT ERE OE ar ote © ae a een eae POPULAR MECHANICS ADVERTISING SECTION Makes the Deaf Hear Here is good news for the Deaf or people who are hard of hear- ing. Science has at last triumphed over -—s - that —t fanny om - At Try It (0 Days FREE Y ry ase this ays invention until you have tried Siciee 10 he . until you have proved to your entire satisfaction that it ie what you —_ and want — ontil you are abso- \utely certain that it will enable you to hear all sounds clearly.Then if you wa vee you aes _ and ey = it, otherwise retarn it ond there Send No Money We ask for no deposit. We do not ship C. O. D. Ze pend gan Gte latest scientific prveption entirely at our own risk and —d 10 days FREE TRIAL. We don’t ask you to pay first A — fund your money if you are not satisfied. We send you the a con without eost or obligation. It aaast puoee SS one merits to your entire satisfaction. Uniess you are amazed a hted with it, you are not asked topurchase, When we ne oReD IAL, we mean FRBE TRIAL, so send name and address at once for de- ecriptive literature, testimonials and FREE TRIAL request biank. Dictograph Products Corporation 1307 Candler Bidg. 220 W.42nd St. New York TESTS SHOW FORD CAN RUN 60 MILES ON GALLON OF GAS The amazing fact that a Ford can run 60 miles on 1 gallon of gasoline was recently brought to light through tests conducted by America’s foremost engineers. Great strides have already been made in this direction by the recent invention of a simple attachment which can be installed in a few minutes without any alterations to motor. A.C. Winterburn made 41.4 miles on one gallon of gasoline after this device was attached. B.O. Weeks, famous aviator and inventor, wants agents and will send sample for trial. Write him today at 1304-601 Fondulec Avenue, Milwaukee, Wis. Ride A Ranger The finest bicycle ever built. 44 colors sizes; made in our new factory. SAVE ee to 5 by direc t from the factory purchase, Delivered free on al, express erepese, $ for 30 Days’ Free Trial. Easy P: best quality, at factory prices, express paid, Lamps, wheels, horns, equipment — at unusually low prices. No Mone Are Your Headlights Out? The Cleverest Little Device Ever Conceived IS-IT-LIT REFLECTORS | | ror Handsome, ornamental — easily attached; tells in- flantly from the driver’s seat if one or both head- $1 25 ehts are out. Avoid danger of -being run into = on side without lights, stopping by police, etc. pe fe Handy Specialty Co., 79 Wainut St., Somerville, Mass. Any handy man or boy can Power supplied by famous P.SHAW Motor. Send for iiidetrated G irculars, 2c post- paid. Complete IMlustrated Pook of Building Plans 25¢e postpaid. Write today. ne as | aie turdy, dependable motor car. build _ mo 2 +! y Fills Tank —Gauges Gas Without Lifting Cushion Ev Ford owner is tired of lifting cushions. This com- bi gasoline gauge and filler makes an instant hit because it fills Ford tanks without lifting cushion. The gauge is always in driver’s sight to keep him from running out of Makes Ford tanks handier than a tank at ZT F-12 rear. . L. Porter, Colorado, Texas, sold 3!» dozen in 414 hours. - = FILLS YOUR TANK GAUCES YOUR GAS Weighs two pounds, simple, strong and durable. Pro- tected by basic patents. Absolutely no competition— —s even pretends to serve the same purpose. Fil- Gage, a combined Filler and Gauge, sells for less than a good visible gauge alone. SALESMEN! DEALERS! Read These 8 Big Points 2. A gasoline filler and gauge combined, for less than usual price of good gauge alone. 2. Nocompetition. Protected by broad, basic patents. 3. Every Ford owner a live prospect. 4. Clamps into regular gas tank opening. é: Absolutely guaranteed—Nothing to reak or get out of order. @. Circular matter, window and counter displays, free co-operative local news- paper advertising furnished. 9. Profitable—Quick Sales—No Service —No Grief. 8. No price resistance. Fair established retail price. Liberal profits to salesmen and dealers. Retail Price § -24 For closed cars $6 §0c extra in West Wire or Write Socen Send for sales plan, prices, helps, etc., today before territory you want is closed. If you wish, send $1.00 for sample; C. O. D. for balance of dis tributors’ price. Clamps into Tank Opening advertising Fills Tank— Gauges Gas with Cushion in Place A. J. KIRSTIN CO., Mfgrs. $S2 First Street ESCANABA, MICH. Please Mention Populer Mechanics

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160 POPULAR MECHANICS ADVERTISING SECTION

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A flashing, blue-white, absolutely rfect diamond, —— with the ery colors of w, mounted in latest style engagement ring. Guarantee Certificate Free. TWO BLUE SAPPHIRES are attractively set in the shanks of this 18 kt. solid white gold engraved and pierced ring to add beauty and style. Send for this perfect diamond. Just send $2.00 deposit to show your good faith (or pay post- man $2.00 on delivery) and we will send this handsome diamond ring. Then Pax oniy $6.00 a month for ten months. Total price only $62.00. Guaranteed value of $85.00. (Mention size.) ABSOLUTELY PERFECT QUALITY The finest and best blue white diamonds have ne flaws, no imperfections, no spots, scratches or blemishes of any kind. The diamonds in these rings are uaranteed absolutel perfect and flawless. Priced at $29 a carat, but wort double. Will stand any test or b . FL WARNING: Do not be fooled into thinking that diamonds advertised as ‘‘pe + cut’’ are absolutely perfect in quality. — = yet experts will tell you that 95% of all diamonds advertised my y cut’’ actually are ‘imperfectly cut and besides nev e flaws and spots and imperfections of one kind or another which cheapens them. Our big catalog gives valuable facts. Write for Big Bargain Catalog it brings our large jewelry store right into wea home.

Other sparkling diamonds, sight perfect quality, listed below: ORDER FROM sEse BAR GAIN E393 6 Carat cecceeoooess $25. Carat 147.75 eocceseoeces 333-25 ry os he enue $357.00 Pe ccccccocecs nea 8 - NL ccccvcsees 246.25 % SS sececovecces SE ESR cevsccdanbe 295. lg Se ceccces -.+- $98.50 12 @ . scineedunl 394 Every diamond guaranteed genuine blue white. ba a back guarantee certificate with each Gamecon Pay down and 10% per month woR H $328 a “CARAT.

STERLING DIAMOND & WATCH CO. (Diamond Importers—$ 1,000,000 Stock— Established 1879) 63 PARK ROW Dept.1691 NEW YORK, N.Y, EARN BIG PROFITS

Selling Electrical Appliances = = WE START YOU OUT SSOoOY cnake electrical industry is yet merely in its infancy, Get in on the ground floor of a dignified, interesting and profitable business. Steady income, pleasant, easy, demonstrating Violet Rays and electrical appliances which sellon sight. Experience not required. MEN and WOMEN earn big money, spare or all time. Salary te producers. Commissions liberal, in advance. We deliver and collect. Write for exclusive territory VI-REX CO, Dept. A-74, 211 S. Peoria St., Chicago FREE Bargain Catalog! Absolutety Free—this great book with over 300 | my of amazing bargains in homefurnishings, machinery, etc. = on easy monthly terms and 30 days FREE TRIAL. Send postcard! HARTMAN £U5 punnituae wanear CD.,

Looks Like $5.00 Worth Gives You $1.10 Profit! AGENTS*355

$12 AN HOUR! Marion, a beginner made 36 sales in three hours, first pa, ee ee sour prod ucts with a first sale of beautiful combination sets of Toil Articles, Soap, etc. You sell at half store prices—no fan talk—-sell on sight. Make 20 to 30 salesaday with$1.10 profi oneach. Easy toaverage $100a week. Could you ask more while introducing line, establishing a permanent business for yourself? Another pian calls for no deliv eries, no invest ment, nodelays. You bank immediate profits. Alsoa plan with winning premium to each sale. rite quick for full details FORD FREE! No‘contest. Every producer gets ® a Ford Car absolutely free. Most amazing offer ever made. Don't wasteaminute. Write TODAY for illustrated circulars explaining our Unique Pians including 30 other packages. ACT NOW E.M.DAVISCO. Dept. 5618 Chicago

TIRES WITH 500 NAIL HOLES LEAK NO AIR A new puncture-proof inner tube has been invented by a Mr. M. J. Milburn of Chicago. In actual t it was punctured 500 times without the loss of a This wonderful new tube increases mileage from 10,000 to 12,000 miles, eliminates changing tires, and makes riding a real pleasure. It costs no more tha the ordinary tube. Mr. M. J. Milburn, 331 We 47th St., Chicago, wants them introduced eve where and is making a special offer to ag Write him today. See our advertisement on pag 187 February issue.

Spread S21 ordering direct trom your factory, ss/* W. Price You will cave on oor reliable ena! ve3 Built to > dobar, aenee work. Kerosene, Gasoline ing. a f>'s 3 Sonne Tri 10-Year J ° wa engines im use in forei go countries. port correspondence FREE 453 oT TAWA MFG,.CC. ~ oy orr nN : “welte Bee Site neees Magee Bids. PITTSBURGH, PA.

MAHER & GROSH CO., 106 “A St., Toledo, Ohio Direct: at Factory Prices This $2 KNIFE $1.18 Postpaid Razor Steel Blades Handy shaped Blade makes ths knife it for mechanics, sportsme! and farmers; light but strong: © sharpened easily. Stag handle. Ger- man silver finish: blades file teste: hand forged from razor steel a! d warrantec . Sample $1.18 3 for $3.00 Postpaid Send for our 100-page List and “HOW TO uss RAZOR"

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: POPULAR MECHANICS ADVERTISING SECTION SELL COAL! 161 Mr. J. Montgomery of Mii- nois sold five cars his first day, commission $125.00. Mr. Hepburn of Iowa sold nineteen cars of coal first month, commission $475.00 Very next month he increased his sales to twenty-nine cars making $725.00 for one month's wo Mr. J. C. Reames of South Dakota sold twenty-three cars his first month making $575.00. Mr. Jay Stiles of North Da- kota sold twenty-one cars the first month, profit $525.00 Mr. H. C, Oldberg of Wis- eonsin sold eight cars of coal his first day, commission $200.00 Mr. Wallace of Michigan, selling only in spare time, sold six cars of coal in one week, commission $150 00 =e ™ MEN WE are the largest firm in the United States exclusively delivering coal direct from car to GET BUSY! consumer without the use of any coal yards. Biggest profits ever known are being made Stores, factories, echocte, gussane. banks, Retetn, Respttals, churches, public buildings, and bomes can save hundreds of dollars per year by buying their coal through our sales- by our salesmen. Coal is a necessity and eas- , || INCARLOAD LOTS N AN HOUR EARN AWEEKS PX l TOTHE USER. te ett, men. We want salesmen who will solicit carload or or eapital necessary in selling our . _We do not require you to collect bills or take care of deliveries. You just take the orders. No sample case needed in this line. Just s all or parttime. No experience carry our portfolio “Coal Facts.” COAL ORDERS ARE BIG ORDERS. Season now opening up. Write for full detai No coal user can get away from them. You Can Do as Well as Our Other Men and Make $2000 to $7000 per Year Earn a Week’s Pay In An Hour—Liberal Drawing Account Arrangement THERE HAS NEVER BEEN A BETTER SIDELINE ily sold on our plan. ls of our offer and state territory covered. WASHINGTON COAL COMPANY, 826 Coal Exchange Bidg., CHICAGO, ILL. Collapsible Garment Hanger Wonderful space saver for crowded wardrobes and closets in homes, hotels, halls and business places. Occupies no more The Gregg Football Game : space, yet holds four timesas many | A actentiie game Set pee ey oR current ete petncioten, oes tes " “ » the new 1924 football rutes. Not a children’s toy played with a | { \ \ ee — — best spinners, cards or dice, but a game of wits and strategy played ‘ | ! aK = — —_ & + a with two teams on asmall football field. Each player of Gregg users. Send for circular or $1.00 for sample 808, Complete sat is- faction guarant or money back without question. B. D. GAUSE MFG. CO., ELKHART, INDIANA Football is his own Captain and Quarterback and directs his team as he thinks best. At your dealer's or post p’d direct for$2.50. Write for tlustrated folder. ALBERT A.GREGG CO. Dept.M West Jefferson, Ohio | The Johnson Folding Pocket Rule The Johnson Folding Pocket Rule is made of Spring Nickel Silver, accurately and distinctly graduated. It can be used as a Square, Hook-rule, Caliper gauge, Protractor, Triangle or Tri-equare, and can be ap- > to practically all o mechanical work. Vernier ne-balf ree. Center Joint hase fibre bearings which i Bot become loose and will remain firmly at any angie. No. 46-8” Rule $2.50: No. 45—12” $3.50. Includ- ing chamois cases. Money ref if not satisfied. on tect yourseit against hold-up thogs. rowdies, ete. and et Same time it serves as the best novelty ciga- E. P. JOHNSON RULE MFG. Co. Sette case over invented. couses ) 565 W. Washington Bivd., Chicago, i11. oe ays li the trig- De B foot Telescope pu i : SEND NO MONEY i's 2. teins “Ss fcr. pack tice See people and objects miles away just like a @ ¢ f package of they were close, see Moon and Stars as ss & your cigarettes. you never did before. Brass bound, Sa ° Lotsoffunscaring t- Pending Sostel and entertaining. a your friends and at the same time useful tail color 0 ane 4 miles ace and a great protector. - i e. et gun motel Satch. 43/4 Inches a. E 4 a ee ae hoe j $1.79 each — . = back if not satisfied. — 2s mss a af ATEFINDER COMPARY js 3: ae e th Avenue New York yaid des oa AKE wR Life-Sire ¢ hn voor FORD ORT CAR—SAVE550 to $150 wirn REO/-Aut siscns $440 re Famous e-size patterns for each of the body Easy-to-Understand instructions ona yer- pore: ae Red Hut tase instroctiooe, bow Fea 4 - hay FB oe and Tail Delivered AA = rit erent icece eta oe SOMGAL O1g WHEEL CAT TERNS an easily obtained materials. No need to lay up the car. ) wonderful days matrat a LE RED ENO'S PAL-Eno onze, © Fetal Up-to-the-minute. Vou aid 41431. It took me fust 8 Sundays to, bold ts ocd ¥ trons. go treme sutton ere am prowd to hear them say, *He bwilf that : manual o. E "oppy epert car’ J never cut any stecl or did - Teeasaptoers before but one can't ge wrong with 1io The er oe (Overland — St. oe | 38-inch, Easy- riding seat

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162

y im D Pavan i ake'Every Night Silent Night! TRAP OUT THE INTERFERENCE lll i i | |

ah FERBEND Lon CT REC COMPANY 15 E. So. Water St., We guarantee that the Ferbena CHICAGO Wa ve Tra Descriptive Folder when properly 2 connected to any en Request workable recette fFERBEND tng set, willtune oul any intere 7 fering station, ave Y) wa me aa © a a a a a

ONLY $00 heat regulators, door-openers, c . from the same current that lights your home. lir-Way | Avoid the annoyance of having bells out of Order. At anominal cost you ean install this little device which will ring electric bells, buzzers annunciators, electric ete

ennects direct to lighting-current, and eliminates for ever the use of troublesome dry batteries. Does not use enough current to register on meter. Buy it from any elec trical dealer, or we will send it anywhere postpaid wpon receipt of price. Your money back if you are not a9 tisfied | JOBBERS, DEALERS, AGENTS— Write for selling proposition }

‘ Pioneers in the Industry )

At rock-bottom prices you get the efficiency of sets costing three times as much. Users tell us that Miraco Radio frequency receivers pick up stations from coast to coast. Operate either on dry cells or storave battery. Solid mahogany cabinets — finest workmanship throughout. Order direct or send for bulletin Two tube outfit . . . . $29.56 Four tube outfit . . . 54.50 DEALERS— AGENTS— Write for proposition quickly— it’ sawinne THE MIDWEST RADIO COMPANY 807 Main Street, Cincinnati, Ohio

FREE Radio Text Book and Catalog F A Post Card Brings it CONTAIN 75 VACUUM TUBE 300 ILLUS. HOOK-UPS 500 RADIO ARTICLES All Armstrong Circuits: These impor- tant circuits are explained clearty, all values being given, leaving nothing to puzzie you. Also 75 full, clear diagrams, explanations andinstructions forallimportant vacuum tube circuits, from the simplest to the most advanced, How to make a wave- trap — how to increase wave lencth of set — acrial data — tube data — battery data—reflex — regeneration — radio am- plifiers—audio amovlifiers—loud speakers tables of component parts, and endless other’ radio subjects covered in simple, understandable way The 75 Sagreep in book form ny yne would cost you $3 to Get this all FRE Send for it right away. Offer limited.

AIR-WAY ELECTRIC APPLIANCE CORPORATION Toledo, Ohio

Vacation — Outing — To This year go with Radio. Camp, fish, hunt, tour with Radio. complete. Liven up the rainy days and long, dull evenings. Tak Ozarka Portable, Long-Distance Receiver with you. certs—the special features of hundreds of broadcasting stations. have it for home use when you return. unusual. Simple to operate. ‘Convenient and light to carry. Case is 16x10x5 inches. Completely equipped with aerial, **A” and ‘ No. 199 tubes, and one set of head phones to listen in $65.00. Extra phones $5.50 pay balance on delivery. ) f Big demand. Satisfaction guaranteed. Local Representatives Wan Ozarka Radio offers the greatest opportunity to make mone market—easy sales. Over 1800 Ozarka Agencies now doing wi business. Some territory now open. You're interested, so write t« the “Ozarka Pian,”’ but don't fail to give name of your county.

Radio Wherever You Goll Get the sports returns—the con- Ozarka is built for long distance—1000 miles is not Only veur 10 Ibs. complete. Ready for instant use. Price complete ready Order at once. OZARKA,., Inc., 65 N. Peoria Street, CHICAGO

uring Make your vacation e the new, wonderful And, best of all, you'll Batteries, three Send $10.00,

ted v. Big ynderful »day for

Th Ser = 2°, Jot pS

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POPULAR MECHANICS ADVERTISING SECTION Como Duplex Transformers (Push Pull Power Type) Price $4950 : | ta Per Pair The Como Duplex system of audio frequency amplifi- cation (push-pull) > es the maximum volume without distortion and tube noise. There is a combined filter- ng action which assures perfect results when ordinary amplification transformers fail. Can be used as a single-stage, two-stage, or a three-stage amplifier. The World’s Standard Push Pull Transformer Send for copy of “How to Build a Power Amplifier.”’ COMO APPARATUS CO. “46 Tremont St. - BOSTON, MASS. a hele pac’ PACE > uper - Heterodyne — Neutrodyne an a a Super Complete Branston Kits, meme Onell- lator Coupler, Antennae Coupler. 3 Inter. R. F Trans. and Special Transfer Coupler. Complete Kit lists Acme 30 Kilocycle R. F. Trans. $5.00. All American 2.000 to 10.000 Meter Trans. $6.00. Hileo Antennae Coupler $8.00. Oscillator s wig pw Gen. Fada Neut. Parts, . be, $65.60, 4 Tube, $64.00. Kit, $25.00. Anencan@Mr Co. WHOLESALE STRIBUTORS EPR GWestl4ruSr. Kansas City. Mo Build Your Own Radio You don’t have to know anything about radio to build our new “LITTLE WON- DER” set. 2,000 miles has been the range secured on this marvelous outfit. Costs no more to build this set than price of parte for a cheap one-tube set. Simple, easy instruc- tions. Specially fitted parts, essembiec " Make sete for your friends and earn money time. Get baseball and other reports this summer. Also concerts. Write TODAY for free information. polltions speeches, K-D RADIO BUILDERS, Room 240, 416 Se. Dearborn St., Chicago, Ill. SOLDERALL_ Zp SOLDERS ALL 4 JOINTS PERN APPROVED BY THE NATIONAL BOARD of FIRE UNDERWRITERS € ¢ i “12s AT ALL M DEALERS SOLDERALL co. Newark. RADIO TUBES The Standard Tube for All Makes of Radio Receiving Sets It is the Vacuum Tube that has made possible the broad and far-reaching application of radio telephony. Cunningham Vacuum Tubes, stand- ard for all makes of receiving sets, are the prod- uct of the creative genius of the engineers of that great scientific organization, the Research Laboratory of the General Electric Company. Patent Notices oor ene ited 2 18.08 and others issued and pending. Licensed for amateur, experimental and entertainment use in radio commu- nication. Any other use will be an in‘-ingement. The care and operation of each model of Receiving Tube is fully explained in our new 40-page *‘ Radio Tube Data Book.’ Copies may be obtained by sending ten cents to our San Francisco office. — — Prices on Cunningham Tubes Now in Effect C-301A—5 Volts 1-4 Ampere filament. . C-299—3 Volts .06 Amp. Dry Battery $5.00 4 of eee 5.00 C-300—5 Volts Gas Content Detector 5.00 | | C-11—1.1 Volts .25 Amp. Dry attery — Det. and Amp. Special Base...... 5.00 | C-12—Similar to C-11 with Standard Base 5.00 Tue 30 Church St. NEW YORK Home Office: 182 Second St. SAN FRANCISCO 154 W. Lake St. CHICAGO

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164 Att You Use a Blow Toreh\ You need TURNER at once to take care of those endless odd jobs that seem always bobbing up. Stotte Aur iniet flared Arr inie® seeren'e Sever ate Neod'e valve TURNERBLOTORCH Safe a3 2 Candle” + i) is ABSOLUTELY SAFE. In addition to being the only safe blow torch in the world, it has such a wealth of improve- ments that the home without it is positively handicapped. In a jiffy, it delivers a flame 400 degrees hotter than ordinary torches. An intensifying baffle that enables you to get perfect results with any grade gasoline or kerosene. Comfortable pistol-grip handle. Twin Needle System prevents orifice troubles —gso common with ordinary torches. Safety Valve and leakproof, sturdy tank. Easy to use, handle and operate. Lifetime service. No home should dare be without it. At your $8.2 5 hardware store, or direct —get it now— POPULAR MECHANICS ADVERTISING SECTION SATA ARTA Approved by Over 200 Experts | New Crosley Engineering Achievement A three tube set with five tube efficiency—the ereates selectivity with the minimum effort—positive calibratio to any wave length between 200 to 600 meters. These a: only a few of the many advantages offered in the remar! able new Crosley Trirdyn Radio Receiver. ( It took usa year of constant experimenting to perfect this : exceptional instrument. Then we shipped 200 to experts : every part of the United States, to see if our judgment was correct. Their opinions were unanimous—‘‘the last word ir radio accomplishment”; ‘‘ease of logging and selectivit, , remarkable’; *‘this set should go over big,” etc ¢ The Crosley Trirdyn in range, volume and selectivity is th : equal of any five tube receiver on the market. Great volume will, of course, be obtained through the use of storage battery tubes, but it wili function well in any type and can be used with either indoor or outdoor antenna There utll be a great demand for the Trirdyn, licensed under the Armstrong U. S. Patent No. 1,113,149 See it at your Dealer's today. CROSLEY Better -Cost Less Radio Products The Crosley Radio Corporation | er POWEL CROSLEY, Jr., President - - - - Formert Won ¢ H TURNER BRASSWORKY ) The Precision Equipment Company and ‘Crosley Manufacturing Company orR Industry Ave., SYCAMORE, ILL. 615 Alfred Street CINCINNATI, OHIO The World’s Largest Exclusive Manufactur- fi ASUUUUUIAEHPESUOVUTTT PAT ERSEUe UCL TAPER Lt I UAV ers of Blow Torches, Fire Pots and Brazers Save+Cost of New Tub | Pr ve+Cost of New Tubes | or VACUUM TUBES REPAIRED The World’s Standard Loud Speaker »- Guaranteed equal to new. Send in your = iP burned out or broken tubes by P.P. All SVERV IMIG IN GENUINE : & repaired tubes returned P. P.,C.O. D. We 10 ie try to repair and return within 48 hours. . . * CATALOG S Harvard Radio Laboratories SNb's 200-204 Old Colony Ave, So. Boston, Mass. * 4 £27 ARLINGTON mu Complete RECEIVER au NOTHING ELSE $7750 TO BUY Here is a crystal set tor the beginner. Brings in local broadcasting on all wave lengths and code signals up to 4,000 meters. Every- thing complete, head set, antenna, receiving set, and all-insulators, etc., all for the un- heard of price of $7.50. Send your order at once, get into radio, you will find the future has big opportunities and big salaries for those who know. HECCO ELECTRIC COMPANY 911 Sheridan Road Menominee, Michigan Replace present Dials with UNIVERNIERS—make yo set 100% more selective. stations accurately by dial numbers. One knob tunes vernier fine or row at will. Write for free Radio Catalog. Quick servi Real savings onorders. Moneyback guarantee. Addre Atwood-King, Inc., 163 W"'wacnecton se., Liticage PE TN DE ERR Se, INC. AT CUT PRICES R A D | 0 PA x T Largest stock in N¢ - Everything brand! first-class. Orders shipped quickly and carefully Prices include delivery. We can sell for less than others because we bu quantities, pay spot cash, and ask only a small profit Just pay postman on deliver SEND NO MONEY erence Corn Exchange Bank, Il ro ae Branch (cepital $10,000,000.00). Satisfaction Guarantee: Transformers, All-American, 3-1, 5-1, 10-1. ($4.75)... 53 ‘ Tubes, O-T 2, 4-v., dry cell; made by DeForest. ($6.00 eee nas Tubes, RCA WD-11, or WD-12, 1'2-volt. dry cell. (39 00 : ; Head Phones, Littie Tattler; always satisfactory (34 00 =? Head Phones, Baldwin ‘‘C’’; double; none better ($12 o0 . s 4 Couplers, Genuine Capitol All-Wave, 150-3000 meters $7.0 5.4 Variometers, Liberty, moulded; 150-600; best. ($7.00)_ a’ aks Loud Speakers, Perfectone, adjustable; excellent ($15 " +t ; Loud Speaker Units, Blue Streak; single; any horn. (= i) oi 25 Neutrodyne Kits, Work-Rite, Hazeltine patents. ($17.5 » ; i With your first order we wilt send you free @ 20r FREE! radio station map of the United States and as : Decalcomanta name transfers for your pane I. ‘ ' Book crammed f Send for Bargain Catalog nine ssvinc om sets, parts, accessories and diagrams. WRITE FoR iT = A LIBERTY M. O. HOUSE, Dept. R163, 106 Liberty St., New Yo

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nt | we

Se ee “—— |

— vv ~~ [3 he Bee figure, recharge the system with renewed strength OW ~vitality. Nothing like it ever invented before— automatically your correct chest expansion and hes breathing capacity. The principle of the PSYCHO-EXPANDER is that which gives to Great Singers and Giand Opera Stars such perfect health and charming physical development. Wonderful Invention for Singers, Speakers, Teachers, YOU! ERFECT BREATH CONTROL and richer tone quality ) voice now assured. Results amazing for everyone who res to improve in voice and health. It is a positive | many who have practiced so-called “deep breathing”’ -

Develops Neck, Chest, and Shoulders to Striking Beauty Automatic Resistance Gives GREAT LUNG POWER— Perfect ‘“‘ Breath Control’’ for years, have been able to increase their chest expansion one inch in less than one week with this invention—and take into the lungs without conscious effort a greater quantity of oxygen with each normal breath. You know what this means —new life — better health — more energy — beauty — superb physical development — a charming voice and personality — even longer life. —— = You have NOT been Liv ING before. Write for Men—Women— 1 ivabie new beck, "FRESH AIR BEAUTY” — filled with startling facts that will surprise you — with letters hard to believe, telling of the merits of the PSYCHO-EXPANDER. seneeesessesee PSYCHO-EXPANDER CO, coceaceecesecces:

Dept. M, 1900 So. University Ave., Denver, Colo. : Please send quickly your valuable new book—"*F RESH AIR BEAUTY” s —and full information of your Special 10-Day Offer. s . . GME. cccccbvovcrccecc: cosccccsceseeseceseesosceseoocooooes ° . CO EE ee a a Se }

FROST-RADIO EE this handy, low priced, single-hole, panel-mount- ing eng yA switch at your dealer's. A big value ina qual- ity product. HERBERT H. FROST, Inc. 154 West Lake Street, Chicago

et 2A “na jui-jiteu. i a Peplendid phy wae, ap =) vectoct —_ ‘ect health. tS this popular amous w © champicno the marvuloas Frank Gotc Gotch ana Farmer Rete See learned at hom at gt bone By om mat Mao and be and boys — £T aor $s eto yy i Row. acid, big raed ey tute, ‘as this ue wonderful « Farmer Burns School of Wres Wrest ’ A977,Ram Bid ~~ Neb

RAiIC TUBE ___ Can receive 100 miles and more. RUSH your pame to learn how you can get a Vacuum Tube Radio Set witout cost Don't delay; write to- day rk, FREE RADIO PLAN. HOME SUPPLY Co, 131 Duane St., N.Y. c.

Your money goes farther with Murdock MURDOCK Radio Phones are one of the best phone values on the market. They are famous for their ruggedness, clarity and volume re- production. The new flat headband permits you to wear Murdocks for hours without discomfort. Get a pair of Murdocks today and test them out. They are fully guaranteed. Write for FREE BOOKLET —‘The Ears of Radio.” WM. J. MURDOCK Co. 349 Washington Avenue, Chelsea, Mass. Branch Offices: Chicago and San Francisco.

STANDARD S IN CE Ea eK

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166 Mot Market Pri Never in three quarters of a cen- tury have we offered such amazing bargains. Hundred of money - paving prBargain List, in latest Diamond equalling those sho Here’s why we can ay ‘such remarkable values: This 75 old firm—rated at over$1,000, capital — the largest and oldest diamond banking institution of its kind in the world has made loans on Diamonds, Watches, and Stee in excess of Why Pay Full Prices Costs Nothing to See Thousands of unpaid loans. Must sell now. Diamonds, Jewels, Watches and other Gems of un- usua) qualities — at an entirely different price basis— viz: loan values not market values. Atour es, finest geme obtainable igher per r caret—bat proportionately low berealp prices. have a loan values also, unlimited change privilege at full prices. Latest List Diamond Loans Send at once a, for latest list. ties techs ig detail with exact ct weight, color ity, etc. Ge details of Free i tion offer. No obligation. List is free. Mail il Coupon Now | fice 1921 DeRoy, Bidg., Pittsb Without oy tion, send me free, your latest Bargain Diamonds, atches and other jewe ary. NGM. cccccccccccccccccecs POPULAR MECHANICS ADVERTISING SECTION ~ SQ \ 500° AGENTS 22°, Genuine Gold Leaf Letters For store fronts, office windows, Bank windows, Office Doors, Pan- els, Board Signs, Trucks, Auto- mobiles and Glass Signs of all kinds. Anyone can put them on and make money right from the start without previous experienc: All you have to do is to show your samples; the letters are very at- tractive and easy to sell. Letters costing 4c sell for 25c. One agent says: “Your Letters ar the best thing I have seen in I have made $125.00 the first week and still going Paul Clark says: ‘Smallest day $28.70." H years: strong.” Gilder made $835.00 in six weeks. 2 tot g eeeeeeseeeee CeCe eee eee Ceeeeeeeeeeeseeeee { ) ] 4 } AABPEED cccceccveccccccoccnssccccceccccccccscoeeseocensencnnceeneess ' . Fo COPE CE TERR OOeO Eee eee eeeeeeeeseeees -State..ccccccccccccce OOO OO OOS 22242 22222222 ONE YEAR TO PAY- Know the joy of owning — for business or pleasure—a Harley-Davidson, celsior, Henderson, Indian, Cleveland, or any other standard make; in our own factory. Writefor Free Bargain Bulletin and Easy Payment Plan. SHAVERFORD CYCLE CO. OF PENNA. America’s Largest Cycle House Established 28 Years 503 Market St., PHILA., PA., Dept. P. M. thoroughly rebuilt $60 TO $200 A WEEK GENERAL AGENTS — It is easy to appoint sub-agents fo this line. We pay you 20% commission on all orders we receive from local agents ap pointed by you anywhere. We allow you 50% discount on ) own orders. You can sell to nearby trade or travel all over t country, as you please. Large demand for window letter everywhere. Write today for free sample, full particulars and liberal offer to general agents. Metallic Letter Co., 433-B N. Clark St., Chicago Custom-Made Tops Less Than Half Pri EASILY ATTACHE Full instructions sent. Compile tops with beveled plate glass, tacks, fasteners ani waits. Free delivery 1,000 miles. For all cars; spe Prices on Stars, Overland Fours, Dodges and Chevrolets, Desc: your car. money-saving Bulletins tree. Automobile Trunks for Running Board or Rear Platform. $-C PRODUCTS CO., 767 Nicholas Bidg., Toledo, RADI Long Distance Set vy] Everything You Need NOTHING ELSE TO BUY Produces astonishing results. Receives music, speeches, | tion, instruction sermons, etc , from br oadec asting stations of miles away, usually a th d or more. Sati tion Guaranteed. 4 eapest meane of ea ever devised. No knowledge of radio « tr city required. No y in advance. Bargain—only $2! 98 for everything 1 of Send for Radio Book Free ay he FM i and cut prices" on part n't delay—write today Ligerty mM. 0. HOUSE, Dept. tose: Do 106 Liberty Street, NEW YOR! CITT SPECIAL 30-DAY OFFER $25 This target practice machine makes lots of fun. Everybody wants to try their ski today. Penny in slot from pistol f it hits bu : eye, it comes back in slot at no cost to Pertect. shooter. A most fascinating game of skill Only a few of them will make you big money many of them will make you a fortune $9000 a Year Money-Maker That’s what Anderson of Mansfield, O., machine—the biggest novelty hit in the country. 1803 pennies—just think! ing for you EVERY DAY, you’d count your profits in four figures would grow in leaps and bounds. $200 to $500 yearly each—regular mints for profit. ¢ store, a park or a club—then “ h it hatch pennies! Special 30-day offer, $25, or 6 $5 deposit — balance on delivery. Also write for exclusive selling rights — PISTOL TARGET MACHINE CO. earned with this wonderful target pr In two days one machine « If you had 10 to 100 machin -your heel: a Hundreds of machines now in operation « Get one—put it in a billiard r Regular price one outfit, $ for $98, or 10 for $177. Send for your first Absolutely guaranteed nm echa big money opportunity 5835 W. 22nd Street CHICAGO igure your profits. —s _

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ISH ndows, s, Pan- Auto- of all lm on om the rience w your Pry at- Letters One Ts are een in 1 going ~~ pnts for % cash pts ap- on your iver the Pttering ars and jicago Pri CHEL Complet pners a rs; speci Descr Horm. ledo, Q Street Linors “4 POPULAR MECHANICS ADVERTISING SECTION yn Your Ideas Into Money ‘velop your creative ability; let your talents push you ; make your genius and mechanical skill count. It rs not whether you are interested in light manufac turing, ring, or experimental work; whether you are a mechanic, eer, inventor, amateur or student; whether you work in > wood, or composition material, you can get along faster, py our ideas better, and get results easier with the aid of The New Model “B” Lathe Sturdily ybutlt of best quality poteriate. Capable of producing precision work with wide speed range. perates same as large lathe. Thousands in use. Highly frecommended by skilled mechanics. Not a toy—practical and dependable. Unique design, plus standardized methods of manufacture, makes possi- ble an unusually serviceable tool at surprisingly low price. Sold only direct to user on money-back guarantee. Write for illustrated story, complete description and prices. watson Mfg.Co. 106 Watson Bidg. Toledo, Ohio Stylo Pen “INDEPENDENT” All the best features of a Fountpen. Lasts longer. Writes smoother. Improves retin Eliminates fatigue, GUARANTEED, $2.00 By Mail! Kt, e Gold Point, = ed Rubber Holder. r Filler. Pocket Clip. Your Name in Gold Inlay, 25c. ‘rite for Pen Catalog. Agents Wanted, J. C. Ullrich & Co., 161 Washington St., New York Known the World Over for 40 Years. AGENTS £& 200% PROFIT or more. 9 out of 10 Make $10 to $20 women buy. Pro- daily selling duces keen edge Premier Knife quickly. Sells for 50c. and Scissors PREMIER MFG. CO. Sh arpeners. Dept. 29, DETROIT, MICH. “MOTO-ROW” —The Ideal Combination Power and Row-Boat Power when you want it—easy to row when rowing is necessary—the ““Moto-Row” issures you of both. The ‘* Moto-Row” is 16 ft. long, 4 ft. beam, 14 inch depth. Equipped with 2 H. P. motor, housed under stern deck, Natural finished ind copper fastened. Here is a thoroughly practicable dual-pur- pose boat for fishermen, hunters and other sportsmen, at a moderate price. Write to- day for full particulars and prices. BELLE ISLE BOAT & ENGINE CO. DETROIT, MICHIGAN i You Men Are Alike When I learned what 1,000 men wanted in a Shaving Cream, I knew what millions wanted By V. K. Cassady, Chief Chemist GENTLEMEN : I asked 1,000 men what they most desired in shaving cream. We worked 18 months to perfect for you the ideal shaving cream. We made up and dis- carded 130 separate formulas. We had before us all the other shaving creams created. We knew that countless men used each. After 130 trials, we made a shaving cream which no man yet has matched. It excels in lather, in quickness, in durability. It excels in fine after-effects. It excels above all, strong bubbles. We ask a test We ask a test at our cost—a ten-shave test. We will then accept your verdict. If we serve you many times better than others we want your patronage. If we fail, we don't. Please, in fairness to yourself and us, mail this coupon to us. 5 things you wanted It multiplies itself in lather 250 times, so a tiny bit suffices for a shave Super-strong bubbles support the hairs for cut- ting No hairs falling down. The palm and olive oil blend leaves fine after- effects The soap itself is a cosmetic. It acts in one minute. Within that time the beard absorbs 15% of water. It maintains its creamy fullness for ten minutes on the face. To add the final touch to shaving luxury, we have created Palmolive After Shaving Talc—especially for men. Doesn't show. Leaves the skin smooth and fresh, and gives that well-groomed look Try the sample we are sending free with the tube of Shaving Cream The Palmolive Company (Del. Corp.) 360 North Michigan Ave., Chicago, II! PALMOLIVE SHAVING CREAM ® P. Co, 1924 10 SHAVES FREE and a Can of Palmolive After Shaving Tale Snot insert your name and address and to Address for residents of Wisconsin € Palmolive Company (Wis. Corp.) Milwe nuke Wis., Dept. B-748. Addre ~ Lit nsice than Wisconsin. The Palmolive ym pA {De | Corp.), 360 North Michigan ce nue hicago Ill., Dept. B-748

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POPULAR MECHANICS ADVERTISING SECTION

LUMINOUS PA which LUMINOUS PAINT Make Your Watches, Visible by Nigh able eneap at an gaorbieant price, we have at last succeeded ix applied to the surface of an

Clocks, Etc., The very latest discovery in the scientific world. Hitherto, practically unobtain- pro »due ing this remarkable “— emits rays of white light, rendering it portectly visible in the dark. THE DARKER TH NIGHT, THE MORE BRIL- LIANT IT SHINES. Quite simple to w Anyone—you can do it. A little applied to the dial of your watch or clock will enab le you to tell the time by night. You can coat the push but- tons or switcl giates of you electric lights, match boxes, and innumerable other articles; Luminous Crucifixes, Luminous Rosaries, etc. Smal! bottle, price 25e. Larger a own sizes, Oc and ss postpaid Serpent’s Exes Box eontaine 12 eggs. When lit with a match, each one gradually hate hes itself into a snake severs

feet long, which curls and twists about in & most life-like manner, Price per box, 10c postpaid, 3 tor 25c. Potmend M endo

aga t stoves. broken china, porcelain, bric-a-brac bisque, crocke rodenware marble, ete Comes in on re ust mix with water and apply HARDENS Tike TRON Mends « big hole or a small crack RICE 1Sc, 3 for 40¢, postpaid. Midget Bible CURIOSITY Smallest Bible inthe World Size se & post-

2 Pa age Said to Gis good luck to the owner. A genuine work of art. Must be seen to be eppresinted Make good money om mg them to friends, church acquaintances, RICE 15¢ cook. 3 for 40c, 12 for $1.35, 100 for $7. Withabunch of these bills, it is easy for each person of limited means to appear rosperous y flashing a roll of ete bills at th -

prope time and peeling off a genuine bill or two from the outside of the roll, the effect created will be found - be all that can be desired. Price pooqpets: 225 Bills 15¢,50 Bills 25e, 25 for 50c, or $3.50 thousand. Wonderfui X- Ray Tube A wonderfullittle instrument ducing optical illusions both surprising and startling. Withit you can see what is apparently the bones of your fingers, the let in a lead pencil, the in- terior opening in # pipe rtem, and many other similar ilusions. A m ystery that no one eee been able to satiafasterty explain. 3 for 2S¢, 1 dozen 75c. Johnson Smith ace Good Luck

A VERY striking and uncommon ring. Bilver finieh, skull and crossbone design, with PH brilliant, flashing gems sparkling out of the eyes. Said by many to aring ont tae Luck to the wearer, hence ite name Very unique ring that you will take o zyyt wearing. ONLY 25 CENTS.

The Dying Pig

The most laughable novelty yet produced. Made of rubber, and you have only to blow it up and stand the pig on his feet, when he ins to squeal as he slow! collapses finally lies down and dies in the most natural manner. You can blow him up as often as desired, and each time he will go through the same performance to the great amusement and delight of your friends. Price, 15 cents; 3 for 40 cents; one dozen $1.35, mailed. Popular Watch Charms ONLY 3 for 40c; $1.35 dez. Very pretty Httle curiosities and decidedly novel itted with Magnifying Lenses that enlarge the pic cmap to @ very surprising degree; in fact, it seems almost incredible that a clear picture could be possible in such emal! com- pass, and how sharp and diatinct they show up when you look through. Come in views— Actresses, views @ Panama Canal, Lord's Prayer in type, ete Mystic Skeleton A jointed figure of a skeleton 14 in. in height, will dance to music and perform va- rious gyrations and movements while the oper- ator may be some distance from it. NEW BOOK ON ROPE SPLICING Useful Knots, Hitches, Splices, etc. A moet practical handbook iving complete and simple Seenlions for making all the moet useful knots, £ rigging, splices, etc. Over 100 illustrations wire rope attachments, lash- ing, blocks, tackles, ete. & 37 Heraldic Knots illus Y trated. Of great value to mechanics, sagen, campers, boatmen. Price 20c ppd. . MAGIC FLUTE Wonderfully Sweet Toned and Musical The Magic Flute, or Humans atone, is a unique and novel musical instrument that is played with nose and mouth combined There is just a little knack in playing it which, when once ac- wired after a little prac- ice will enable you to nroduce very sweet music that somewhat resembles a flute. There fingering, and once you have mastered it aes can play all kinds of music with {facility on wh hen played as an accompaniment 8 “pune or any other musica! instrument, A lect is as charming as it is surprising.

Address orders for all goods on this page to JOHNSON SMITH & CO. Dept. 129 RACINE, WIS. Our large catalog (420 Pages) of all the newest and best novelties, unobtainable elsewhere, free with every order. BLANK CARTRIDGE Well made and effective; modelled on latest type of Revolver; appearance alone is enough to scare it — be as effective as & rea danger to life. It takes standard .22 < a Blank Cartridges obtainable everye where. paid. Blank Carwridges, Nd express, Johnson

LOOK

Protection against Burglars, Tramps

Prices When loaded revolver without + Superior qualit Bot a Dept. 129, DANCING BEAU TIES 7. Get a Kinemetograph and see the / picture move. France's latest ; sensation, A greatsurprise. Is | worth twice what they cost. Are ‘ A made of solid brass, highly nic- + kled and very durable. Satisfac- + s or your money back. ‘ i 6eReiis « «nat dite wal Smith & Co., Boys! = YOUR VOICE Into a trunk, under the bed or any- where, Lots of fun fooling the teach- ,er, policeman or friends. THE VENTRILO a@ little instrument, fits in the mouth out of sight, used with above for Bird Calls, ete. Any- N Pails. a 32 : book ever 8. page Ok on Vele triloquism, the Ventrillo, ALL FOR 10CENTS 190 — Silke Re anal nts Pane ses. Large jeces, all Heal ay Sure to de ieht you. : stamps, we esend For io Ce nts: laree package and Book of quilt designs. 38 large quilt 1 pound makes a lovel ate rice postpaid. Oursil JOHNSON SMITH &CO.,

Everybo- dy delighted with it. Odd, curious and interesting. Lots 1 of pleasure as wellas very use- ul, is a double Microscope for examining the wonders of nature. It is also an Opera Glass, & Stereoscope, a Deming Lens, a Reading Glass, a Telescope, a a Pocket Mirror, and a Laryngascope—for examin ing eye, ear, nose and throat. It ‘s con all the cost to locate even one painful cinder in the eye. Folds flatand - the pock- et. Somethin eat — you need one. Don't mis mail, with 420 aoe Novelty Catalog. Only 35c or ‘3 itor $1.00 Resurrection Plant a= eof the most won- es Lees g fain Possesses the strange power of turning in a fow minutes on a, arently life- Waa cos, dry herb to 4 seauTiruL LIVING FERNLIKE PLANT of a cute green oper. Simply ty piace the plant in saucer : of water, i open "e and start to grow in 20 winates, will dry up and tae sleep until = ~ = = amen 3 rw © cents. each ersforise* AGENTS WANTED JOHNSON SMITH & CO., Dept. 129, RACINE, wis.

PISTOL

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fis. == \ Vea / yn- n. ge in ym fe- en WS. ee i al FIREITE CO., Dept. 2, Masontown, Pa. 11000 20O0\«8:. We Teach You How to Make It Money—big money—is waiting for — to come and get it. No matter where you live nor what your experience, we teach you how to make money. Special Proposition Open Now on Sight Fireite amazes everyone who sees it used. A single demon- stration often makes a dozen sales. It has saved many thousands of dollars of property damage Men, women and children are astounded and fas- cinated by the ease with which it puts out an alarming fire. It is no exaggeration to state that Fireite is one of the easiest to demon- strate and fastest sellers ever made. Why? Because it is so simple a child can use it with one hand. tt always works—(won- derful secret composition). No pump nor mechanism. Beautiful and long lasting. The low price is within the means of everyone— 50% less than most others. Sold to every home, school, garage, factory, office, store, hotel, etc., wherever shown AGENTS and MANAGERS WANTED In All Territery Not Taken You can make bie money using all or part of your time. We sup- ply everything for your success. This is an unusual opportunity suund, substantial, permanent income. Write for our or manager’s—special proposition todaybefore itis withdrawn, NO BATTERIES Current is Generated by Movement of Lever The most practical Elec- trical Pocket Lamp ever invented. Think of 1t—no batteries. A simple move- ment of the hand generates a current that throws a pow- erful light. Has beautiful alum- inum case—nothing to wear out—lasts a lifetime. Ideal for ye my Motorists, Miners, Watchmen, Camping Parties and should be in every home. ORDER NOW! —while oursupplv is big—the enormous demand will soon be ahead of our large production facili- ties. Don’t wait—send $6.59 bv Postal or Express money order. We «hip postpaid. Price in Canada $6.75. Dealers wrte us on your letterheads for attractive sales proposition A gents: Ask us to write you how to make * big money selling the LITES-IT. UP-TO-DATE MACHINE WORKS 2913-15 So. Wabash Ave. Dept. 618 Chicago, tll. POPULAR MECHANICS ADVERTISING SECTION 160 GET RID OF THUS with no effort at all! Here is the easiest way in the world to rid yourself of that useless, joke-inviting, health-menacing paunch! Simply fasten on Dr. Lawton's A utomatic Waistline Reducer— and the flabby flesh will van- ish. Absolutely automatically! For men and women. DR. LAWTON’S AUTOMATIC WAISTLINE REDUCER Hour by hour, with every breath you take and every step you make, the Waisiline Reducer's Vacuum Appli- cator massages away unwanted bulge. Made of soft, pliable, glove-like rubber. Fits snugly and comfortably to the figure. Weighs but few ounces. Flexible as a handkerchief. SATISFACTION A SURETY Dr. Lawton's Automatic Waist- line Reducer is sold under a guarantee bondof absolute sat- isfaction. Your money back ff you do not like it when you get it. Write now—this minute—to Dr. Lawton for full description, convincing literature and low price. Mail the inquiry blank below now to DR. THOMAS LAWTON Dept. L, 19 W. 70th Street, New York City Seeeeeee et eeecaereseeeeaece Dr. Thomas Lawton, Dept. L, 19 W. 70th St., New York City Dear Sir:—Send me complete description of Dr. Lawton’s Automatic Waistline Reducer, convincing literature and illustrations, and te!l me how low it is priced This obligates me in no way. NAME STREET TOWN STATE The Fansteel Balkite Battery Charger for Radio “A” Batteries is noiseless, bulbless, and practically indestructible. It has no moving parts. Price $19.50 ($20 west of Rockies) . FANSTEEL PRODUCTS CO., Inc., North Chicago, Ill. Put on like Plaster *\WVears like ron -waterproof Lfireproof & resilient lve noiseless | A composition material easily applied in plastic form § over practically any kind of fi La about % inch @ thick. Imperial floor does not crack, peel or come loose : from foundation A conti: S, fine-grained, smooth, | H Ideal Floor for Kitchen, Pantry, Bath Roor T aundry, -slipping surface No crevices to gather grease, dirt, st, disease germs or muisture Porch, Garage, Resta Theatre, Hotel, Factury. Office Building, Railroad Station, Huspital ‘ evera | beautiful, substantial floor is desired Sever practical . plors Full information and sample FREE of your first and s cond choice ot lors Imperial Floor Co., 313-315 Halstead St., Rochester,N.Y. A Success for 15 Years 2

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POPULAR MECHANICS. ADVERTISING SECTION Your Way to Success and Social Popularity The man or woman, boy or girl, who can play the Saxophone finds a cordial welcome everywhere. For school, lodge, church or home enter- tainment the Saxophone has no equal. No other instrument has ever won such universal popularity in so short a time because no other instrument has that rich appealing tone and is productive of so many surprising orchestral effects. Many of the leading saxophonists in the country have proved that the Saxophone is a legitimate instrument. On'y recently a very successful saxophone recital was given in Carnegie Hall. In most cases these artists are playing— ES CHA FSxE SAXOPHONES The same kind we offer to you on easy pay ments—if it is not convenient for you to pay cash. We a'so allow 6 days’ trial—in your own home. You wi!l enjoy every minute while you are learning and soon be able to entertain others, with profit and advancement to yourself. EASY TO PLAY—EASY TO PAY Write for Free Saxophone Book today. Then select the instrument you want. Within an hour you can play the sca'e —within a few weeks play popular hitsand in 90 days take your place in band or orchestra. Write for the Free Book today. Buescher Band Instrument Company Everything in Band and Orchestra Instruments 2559 Buescher Block Elkhart, Ind. —_~——_—-—-—-——_—_—_ -— — ; Buescher Band Instrument Co. 2559 Buescher Block, Elkhart, Ind. ; Gentlemen. 1 Saxophone I am interested in the instrument checked below: Cornet. . Trombone Trumpet (Mention any other instrument interested in.) PUGS He dicedocccqoeseccedscces InI5 Minutes Stoves! ay 9 Real Gas Stove No more sweltering kitchens in Summer — no more fires to build—no more dirty coal, ashes or unsightly scutt!« smelly, sooty kerosene stoves stove in Summer! The Oliver Oil-Gas Burner—in fifteen minutes makes your present coal or wood range areal gas stove that turns on and off with a valve. Gives much or little heat — when you want it—at a twist of your wrist. Just like using city ga Wonderful Baking and Cool Kitchens Best of all you can bake with your own AGEN ina 8) range oven — better than ever before Sixteen models to fit every range or cook stove. Absolutely safe. Lasts a lifetime; acne os mone) $ Low Introductory Price. more a1 200,000 Olivers already in use. Spe ial FREE Book—Mail Coupon Olivers Write quickly for Free Book showing how women are freed from Summer Drudgery over red hot stoves. Send letter or card to OLIVER OIL-GAS BURNER Co. Oldest and Largest Manufacturers of Oil-Gas Burners in the World 656 Oliver Bidg. no more no more slavery toa hot kitchen ST. LOUIS, MO. Big loads are easy : for Auto- Wheel Two, three, four happy boys are an easy load for the Auto-Wheel Coaster Wagon. Auto-Wheel Coasters ar bu t for hard play. See how the body is put together. Not just nailed, but mortised. Auto-Wheel Coasters are so strong t we use them in our factory for carrying loads uj pounds (half a ton). Auto Wheel Coasters and Auto -Caris Write for catalog of all models of the Auto-Wheel and t! Auto-Cart (for little brother and sister). If you send names and addresses of three coaster wagon dealers in your tov ing which sell Auto-Wheel, we give you a year *’s subscript FREE to the “ Auto-Wheel Spokes-man,”’ our magazine AUTO-WHEEL COASTER CO., NORTH TONAWANDA, N. Y. n Inc.

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FOPULAR MECHANICS ADVERTISING SECTION - SURE-O- GAS When the gas tank’s dry, cuss words don’t help. But SURE- O-GAS makes it impos- ible to drain the tank completely. No extra tank. No complicated connections. Just a ilve anyone can install in five minutes. ‘ir a dollar bill to this ad. Write your name te address on the margin for a SURE-O- ( AS valve and full instructions for installing. Your money back if not entirely satisfactory. Agents write for our liberal proposition. Every Ford should have one. THE OTWELL COMPANY 6535 Livernois Ave. Detroit, Mich. Take a look at a genuine CRESCENT WRENCH it up. Grip the handle. Notice ling of ready = and ability ts into your hand. | the thumbscrew. Notice how and smoothly the jaw to exact adjustment. e the narrow, yet super- rful jaws, effective in ped quarters where r wrenches are help- For general utility, is nothing to equal it. CRESCENT TOOL COMPANY 210 Harrison St., Jamestown, N. Y. CRESCENT TOOLS Make Big Monthly Profits CHARGING BATTERIES! You can easily add $150 to $300 monthly to your income with an HB Constant Potential Battery Charger. Battery charging is one of the biggest money- -makers in the auto- motive service field. An HB charges batteries in a few hours that old-style outfits take 2 or 3 days to recharge. No experience is needed to operate an HB outfit—you can start it bringing you big profits the day it arrives. Thou- sands of HB Battery Chargers are in use, making big profits for the owners. There’s a big opportunity for you, too! HB Battery Charging Quickly and Easily Pays for Itself A small cash payment puts an HB 8 Hour Battery Charger in your shop, ready to set up and operate. Quickly and easil) pays for itself on terms of only $20 monthly, just a small part of the increased profits you make from 8 hour charging service Every HB is built complete in our shops, not merely “ assembled"’ by asales agent. Sold to you complete with bus bars, connect- ing cable, etc., that other makers charge extra for. Big pro- duction and direct selling let us save you $35 to $115 in first cost alone on an HB over other outfits. Exclusive patented features make an HB the best outfit on the market, and your biggest moneymaker. Cannot reverse. HB Patented Voltage Regulating Winding eliminates delicate regulators, insures constant voltage. Free 30 Day Trial “ Sax" e y Guarantee Order your HB outfit on trial and use it 30 days. If it does not fulfill every claim we make—cut charging costs, bring new busi- ness, make big profits, and give more complete satisfaction than any other equipment—you return it, and we will refund every cent you have paid us. Our positive guarantee of satisfaction - or - money-back gives you complete protection. Send your name and address for full information. Right now is the time to start making big battery charging profits. Write today for Bulletin 621. Don’t delay!

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172 POPULAR MECHANICS ADVERTISING SECTION | Want Men! Own Your Own Business—In Your Own Town. Make from $5,000 to $25,000 a Year! I must have at once one hundred ambitious men to own and manage, in your own home town, or elsewhere if you wish, our retail chain stores selling staple items (accessories, parts and supplies) for Ford cars at lowest prices ever known. I have a proven, big money-making business. Our stores now operate throughout the country. By our plan you undersell all competition and own outright a steady, permanent year- round business. You need know nothing of this busi- ness; experience is unnecessary. Any man of average industry and intel- ligence can follow my instructions and quickly build a big, money-making business. ec. W. COWELL fire plans. looking for. No Town Too Small My plan protects you, as I place only one store in a locality. You take full charge at once, and sell nationally known products at less than competition can buy for. We supply everything needed — advertis- ing, lists of buyers—ready to pay you their money. If you are live, ambitious, want to own your own business and have a few hundred dollars capital, write or wire me now for full details and plain proof of what others are doing today and every day with our sure- This is the chance you have been Grasp it NOW. E. W. COWELL, 618 South Dearborn Street, Chicago, III. Clean and Compact el cruiser W ll be mc ter Its ease nate en barrassing situations augmented by | Send for this Bulletin it is FREE POSTPAID irtness and dignity of your runabout or a Kermath marine } f operation and its dependability elimi- T articular design and painstaking manufacture dees away with spattering oil and grease — keeps the b« at clean. Remarkable economy of gasoline and oil gives a longer cruising radius Kermaths operate the finest boats. 80% of the | gocd boat builders use it as standard equipment, There is a Kermath for every type or size of boat. | 3 to 50 H. P. KERMATH MANUFACTURING CO, Detroit, Mich. 5886 Commonwealth Ave. A Kermath Always Runs South Bend Lathe 555 E. Madison St. Prices of Bench Lathes SIZE pd poy 9”x3' $231.00 $201.00 11” x4 278.00 238.00 13"x5 344.00 294.00 pe RE A ee Works South Bend, Ind. Teer Waal pigin FM, jae AB ewe Se IY DCH Re es TI | Th W. Car i N don best thar | Carr ii Tru expe Her J ju: port ox folk beat tone suit: whe mea take | TI GP SR RR Ta eee

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a ie | -pen- St a ane ey nen ET 1% oe POPULAR MECHANICS ADVERTISING SECTION ————— can. Can you beat it? We can. Note what this amazing musical invention has done for H. T. Gratz. From a clerk to one of the best high class salesmen, who made $6,000 in less than one year. He says, “‘The old record I | carried with me is that favorite, ‘I Love You Truly,’ and although it is badly scratched up, I expect to get at least $5,000 more out of it. Here’s the way I make it pay me a big income. | just put it on my Serenola—my marvelous new | portable phonograph—and begin to play it for | folks. Everyone is astonished to find that such a beautiful phonograph, with such a wonderful tone, so clear and pure, can be closed up like a suitcase and carried with you anywhere. And | when they learn the price and the easy terms—it means an order, nine times out of ten. I have taken as high as 43 orders in one week.” The Serenola is a Wonder Something new and different. Sells easily and quickly. Does more than machines costing five || times its price. Just the thing for the porch, | garden, picnic or camp. Plays any record. || Fully guaranteed. John McCormick says, | “ When it comes to the use of all makes of records, || your machine does a better job of reproducing || than any other I know of.” RRR NE ARR oT OT Seminar, RUSH THE COUPON It will not obligate you to get the facts. We | will show you the easiest, quickest, simplest plan | for making big money that you ever heard of. If | you are interested in an opportunity to make | 9200 a week, cut out the coupon and mail it at | once. Next week you will be making big money. : PERRY-LUDLOW COMPANY | $4848, DAYTON, OHIO — | Then blame yourself if you do not make $200 a Week You know it is against the Postal laws to make misleading state- ments. All right, we don’t have to. Ted Gnau started out with this amazing musical invention and averaged $37 a day for four months. In 120 days he made exactly $4,455. Can you beat it? We We have records to prove that M. I. Mayer and George W. Phelps—team mates—split over $20,000 in one year. Read These Statements A Clean Cut Sales Plan We are not asking you to buy Serenolas and then leave you to shift for yourself. We have no territory for sale. What we have to offer the right kind of a man is a complete, practical and clean-cut plan of operation. All you have to do s demonstrate and take orders. We take care of all delivcries, collections, etc. If you have never made $200 in one week, then you are going to make it from now on, if you act quickly. And $200 is a conservative figure to set, it is a figure you can pass if you are ambitious and willing to hustle. To make $16 before noon every day is one of the easiest things tc do with this amazing musical invention. Show the Serenola—play one or two records—and you are more than likely to find that you have made $8 for a few minutes’ pleasant work. New Plan—Free Demonstrator As soon as we receive the coupon below, or your letter or postal, we will send you full details about the Serenola, our sales plan, and also tell you how you can get a Serenola for demonstrat- ing purposes without cost to you. eee

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POPULAR MECHANICS ADVERTISING SECTION MONO (0) 23 Ne) | Vacation Days Are Sport Car Days Go Where You Will —Every Mile’s a Thritj PROFIT IN PID? ey q AERO MODEL ‘Pointed Rear) , SPORT T_ BODIES =-$29m with stondaré 4MONTHS! fH poy Ag cde tow Soar rent, ders, etc. >" $95 Up 4,8 sy 16 Overshoes Valve Heads UNDERSLUNG Sport Fenders for Undersiung and FIXTURES Standard Fords. | Come in and see the largest and most beautiful displa Ford speed and sport roadster bodies and equipment ee eee. of Pennelvania mede East. Large illustrated Catalog Free. in 4months making and selling CRISPETTES with this outfit. (Nov. 7th, 1923). ee PRICE NOW | Jacob, Gordon, New Jersey, (November 2nd, 1923), U nderslung Fixtures, $12.50 $9.95 | Speed & P’r Camshaft, $19.00 $11.95 says: ‘Profits over $4000.00 in 2 months”’! Mesner lor 234:1 Gears, 12.50 6.95 | Pr. Bucket Seats, ptd., 13.00 9.95 of Baltimore $250.00, in one day! M. L. Cronen, Getateation or Money Back Guarantee. 50% with order, balance on delivery 4 9 eo a : Seaae Lane: + pay (000 packages Crispertes pis T. V. FORD SPEED & POWER EQUIPAENT MFRS., 250 West S4th Street, New Yor year’’. Mrs. Lune, Pittsburgh, says: “Sold 8,000 packages in ON E day” ° We Start You In Business aioe | OLIVE DRAB Crispettes easy to make, easy to sell. We furnish wo Oo L B R E EC H ES everything — complete outfit, secret formulas, raw materials, full directions, wrappers, etc. No expe- o rience needed. Little capital starts you on road to o wealth. Open a retail store of your own. Sell , ote wholesale to groceries, drug stores, etc. Like cut—new—in sizes from 32 to th a Meadeen of Corr Gan 0 waist. Strong, light weight wool, ‘or summer wear— Made for Home Guards, ya sell a. ratio | svete’: ae H Catalogue Free them. They’re a delicious confection. We'll tel 4 ; you how to build a business of your own. Start 4 : W. STOKES KIRK new, th your cewn. 1627-PM North 10th St., Phila., Pa. Profit $1,000 a Month Easily Possible - eS inataiiisdioaend Used 110-Volt A. C. Guaranteed Motors | ing big successes of Crispette Business. Shows how, Look andruntikenew 26 Cycles with Cord Plug and Pulley when and wher art. Ful lua nfor- ; me tvs FREE, Write a tee pha 1/4, 1 /6, 1/8 H. P. Speed 1450 LONG EAKINS COMPANY Rep. Ind... -cvcsscss.. 22:8 | |

628 HIGH STREET SPRINGFIELD, OHIO Just the thing for the work bench. G I Westinghouse, R. & M., Emerson a Nichols Motor Service Shops, Willoughby, 0

- , r UY, y Ford Here's an inexpensive way of giving your Ford a D. L. H ' snappy ard distinctive appearance. Put o Branston sneycomh | { Coils Lincoln Aluminum Hub Capsfor Fords sad Goued Bork and oes Pend Hout : § . They are mac c y hard aluminun PaAVY . - quest, the thread ore citdns an d will net slipe even BEST for art IVE Tl NING ‘ when the heaviest oil is forced into the hubs. They “a are highly polished and satel their attractive Superior cc sites $ oo finish. Put them on and give your Ford a hand- " ‘ / some “> ARTS. appearance. justment ive bet r Send for Ford Owners Fag RTS-A-FORD CO. se pay eed S. Bore Cut-Rate Catalogue og 1414 a Guchions Ave., Chicago, ttl. eeuasstls Coll “thonk ~ - F a - CHAS. A. BRANSTON, Inc. Alege ry yes PAP eg » are >. > 819 Main St. Buffalo, N.Y A & Si ie. so, a; in Canada—Chas. A. Branston, Ltd., Toronto ; mH ett B - - | (ni y akable. Adjustable to any size head ‘7 50¢ C.O.D. orders filled. By mail prepaid riterion Cap Co.,37W.20th St., NewYork

MAN WANTED 220% concern of its kind. Part or full time. EXPERIENCE UNNEC- ESSARY OUR MEN GETTING UP TO $200.00 WEEKLY. Lowest Prices. RED SEAL COAL COMPANY 354 fe oal Exchange Building, Chicago, Illinois

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POPULAR MECHANICS ADVERTISING SECTION 57 Miles ona Gallon of Gasoline — I have been granted United States Letters Patent on a new automatic self- regulating automobile accessory which is a world beater. Under actual tests, with this device attached, automobiles have made as high as fifty-seven miles on one gallon of gasoline. It removes carbon from the cylinders and prevents ~ spark plug trouble and over-heating. It can be installed in five minutes by 08 $11.95 anyone. It is the greatest gasoline, time, money and trouble saver in the on atten history of the automobile industry. I have named it the Stransky Vaporizer at, New York and Decarbonizer. In the time this remarkable invention has been on the market the demand has grown rapidly. I have some splendid territory still open. I need State and County distributors. Do you want to earn |] |] 2502 to *§00% a Month wool, The Stransky Vaporizer and Decarbonizer is one article that practically sells uards, itself. Previous selling experience is not essential in this business. If you have the energy and ambition to call on car owners and show them this amazing Pa. invention they will buy on sight. I stand squarely behind every Vaporizer and Decarbonizer I sell. I insist upon your being satisfied. I will supply you with free advertising matter, will send you practical sales suggestions and will help you in otors every way to make a big success of this business. If you have a car of your own, so gn much the better. If not, earn one by selling my Vaporizer and Decarbonizer. 23/1 | Join These Big Money-makers ighby, 0 Don’t just wish that you could make a lot of money. Seize the opportunity to do it. What —_ man has done, man can do. The people who wrote the letters from which the following extracts are mb Coils taken were just ordinary, every-day people like you and I. You have the same grand opportunity they have. You can cash in on this opportunity the same as they have done. Read their letters, then decide to grasp this amazing opportunity and send in the coupon at once. ES ne! Mountings TUNING Best Sellers I Ever Saw Had Sold Ten in Twenty-five Minutes . One day I sold one hundred eleven and another two After They Arrived hundred three. They are the best sellers I ever saw.— I sold ten in twenty-five minutes after I ON, Inc. S. J. Brawley. got them.—E. R. Jackson. ffalo, N.Y. Ltd., Toronto — 7 In One Hour Sells Seventeen Vaporizers Mail This Today! : rhe results of an hour’s work—seventeen men gave ae “it me an order for Vaporizers.—J. W. Cronk. ey | J. A. Stransky Mfg. Co. Sells Five Hundred in One Day 1000 Main Street, Puk wana, S. Dak. My best day’s sales were five hundred Vaporizers, Attention: J. A. STRANSKY, Pree. the next was three hundred and fifty, at another time I I am interested in your new Vaporizer and De- sold twenty-three in thirty-five minutes, and at another ing Qe ER ER time twenty-seven in forty-five minutes.—W. F. t making proposition to distributors. This does not Eberlein. obligate me in any way Fe 8 SOOO De2eeee Name Address J. A. Stransky, Pres. J. A. Stransky Mfg. Co. 1000 Main Street, Puk wana, S. Dak. Post Office St., or R. F. D State

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POPULAR MECHANICS ADVERTISING SECTION Do Your Tools Recommend You for the Job? O matter how skillful you are, there’s a certain added respect and admiration that a tool kit of good tools brings you from the boss you work for. He knows good tools—he can tell a carefully selected tool kit—and he knows the man who owns such a tool kit is the careful, thoughtful man he wants for the job. The right kind of tools in your tool kit is a good adver- tisement for you, no matter where you go. Brown & Sharpe tools are tools you can rely on to add to your good reputation. They are made by the first and largest maker of precision tools in America. They are known world-wide for their steadfast reliability and high quality. Send for our Small Tool Catalog. BROWN & SHARPE MFG. CO. Providence, R. L, U.S. A. BROWN & SHARPE TOOLS “The Standard of the Mechanical World”

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ly you like to fish, and if you’d enjoy swift, smooth jaunts away from the city’s humdrum — get a Harley-Davidson this summer ! Where automobiles turn one way to follow the dusty parade — you speed the other, to hidden lakes where all the fish aren’t “educated”! You can fish three lakes — in one afternoon — with a 1924 Harley-Davidson to whisk you from one to another! Extra speed from the lightweight alloy-pistoned motor; Alemite lubrication (first on any motor- cycle); easy-riding, full-floating sidecar; handsome POPULAR MECHANICS ADVERTISING SECTION More Fish! More Sport! ,

olive green finish, maroon striped; wonderfully sp, economical (50 miles for a dollar — gas, oil, TSK ¢ tires and all)! 4 * Ask your dealer for a demonstration ride— rs free. Send us the coupon (at the right) now. —* rs HARLEY-DAVIDSON MOTOR COMPANY Rod _ _—iDE PT. P MILWAUKEE, WIS. fos Sw / Ye Harley-Davidson, « > “a y pan town Write for sasdualnen J e xSP es ~ /

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178 POPULAR MECHANICS ADVERTISING SECTION hee eeneee ‘ : X F U eg & boa LIGHTING = FROM FACTORY TO YOU AT FACTORY PRICES " a COMPLETE WITH GLASSWARE, ALL WIRED—READY To ATTACH 5 ROOM CEILING “19: . Val, $35 8 ROOM SET COMPLETE EComplete Set | 13° This sturdy set is made of solid Brass, Satin or Flemish Finish. Highly polished Alabaster White Glassware—Com- pletely wired with all the necessary attachments g._&___‘ ready for installa- TERT) HALL BEDROOM Living Room, $6.75 Dining Room, $7.00 Kitchen or Bed Room, $4.25 Bath, $1.50 Hall, $2.25 The above fixtures can be purchased individually A RARE BARGAIN! Latest creations now being installed in all modern up-t date homes. Set shipped complete including glass sha and bowls, all wired ready to be hung. No extras r quired. Fixtures are made of genuine brass. You ha . R a choice of Brushed Satin Brass, Jap Gold or W! tion—no extras a ae is of 5 beautiful white Ala eee , baster Satin finish ixtures are of an artistic Patr ne cessary $4 = " pattern. This set regularly sold for $35.00 “$19. 50 Complete DINING Will last @ lifetime. Specially priced . ROOM The above fixtures can be purchased rn fixtures of w E PAY . FR E | G a Tc H A R G E s| $13.95 s if you send cash, check or money order w your order Hall $1.86, Dining Room $3.75. Bed. Room $1.80, Parlor $4.78 | | sup ©, 9. D. express, collect. Satisfaction Liuerants Kitchen $1.25, Big Bed ‘Room $2.50, Porch $1,00, Bath Room $1.28 | L®i2nded. we Sen vue CATALOGUE | UNITED LIGHTING FIXTURE CO., Inc., 280 Bowery, NEW YORK CITY, Dept. R Diamond Sensation AT LAST!!! Amazing new discovery of RAJAH GEM startles Jewelry World. Can b to acid or file tests, les and sparkles like a diamond costing sev- eral hundred dollars. AGENTS Making $100 weekly introducing th magnificent gems. Sam . ple case free. Write y io quick. ? RAJAH SLAmonD co. Dept. 60 lisbury, N.C. We Want Agents at $50 to $90 a Week New Invention—Just Out. Needed in every home every day. Pate Nothing else like it. Low priced—Sells on sight. Sharpens any kit: knife, paring knife, carving knife, bread knife, or shears and scissors in ten seconds. Mechanical masterpiece. A child can use it. Just put knilt slot—turn crank—sharpens both sides at once automatically. We want representatives at once—men and women hustlers. Get this position where profits start first day. No Experience Necessary—200% Profit Make as much next week as these men are making now. J. C. Lew Kansas, says: “I have s one hundred sharpeners in four days.”” Hobart Kerr, of Md., ¥ “The women can hardly wait, till they get them. ° Herbert Cain, of Ky., sold nine after su Saws15CordsaDay! —Easy with the ¢ OTTAWA Log Saw! Wood rw d for $3 acord brings owner $45 a day. Use Engine for other work. Wheel mounted— easy to move. Saws faster than 10 men. Shi OTTAWA MANUFACTURING co. 1741-T Wood Stree Ottawa, Kansas Room 1741- ileaen Bidg., Pittsburgh, Pa. Only At the end rs the first day, J. W. Gordon, of Pa., writes: ‘‘I sold two dozen and § sold to everyone Usaw.”” Wm.G. Hall, of N. J., says: “I think it is great. I sold ox in about one-hal! hou $2 .0 0 The machine isa mighty fine proposition. lt am a mechanic and I ow what | am -y a Selling about.” You can make this money. WRITE TODAY. TERRITORY FREE. Get busy ato QUICKEDGE SHARPENER CO. 385 Srese%rs:.7'st: Jackson, Mich. ig * ia ' » 5 Peas aa

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it eryone ‘ talking t once. ich. N & K Head Sets mark a new era in radio repro- duction—an era of clearness and naturalness. Designed especially for the reception of musical tones, they record the entire range of the human voice and of musical instruments with extreme clearness and freedom from distortion. This is due to mechanical design different from that of any head set produced in America. The extremely careful quality of workmanship used is almost impossible to obtain in this country. Sold on a comparison basis If, when you use N & K Phones on your own radio set, you do not find that they reproduce all the tones more clearly and naturally than any set you ever used before, and if they do not fit more comfortably, the store where you bought them will refund your money, promptly and cheerfully. We protect dealers and replace any returned phones. N & K Head Set, Model D, 4000 ohms, has extra large diaphragms and ear caps, insuring better reproduction, better comfort and the exclusion of outside sounds. Sanitary, leather-covered head bands. Six feet of stout cord. Retail price $8.50. Write for ‘‘ The Phones the Fans Are Talking About,’* interesting new descriptive folder. TH. GOLDSCHMIDT CORPORATION Dept. M6, 15 William St., NEW YORK Exclusive Distributors for U. S., Canada and Mexico POPULAR MECHANICS ADVERTISING SECTION 179 Imported The Phones with the New Idea PHONES DEALERS: N & K Phones provide the high spot in the radio stocks of dealers all overAmerica. Backed by advertising and strong sales co- operation, they are proving attractive profit-makers. Packed in cartons of ten, with display material.

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180 POPULAR MECHANICS ADVERTISING SECTION FREE—Book on Wood Finishing + | ( ’ Ask for a FREE copy of the Johnson Book at any store displaying our Service Depart- ment Sign shown be- low. If no store in your locality has a Johnson Service Department, fillout and mailcoupon. Vi Va), j 2 / 4heLe Johnson's Wood Dye comes in all sizes—from half pints to gallons. It is conveniently put up in fine a bite 34: reseal glass jars. JOHNSON'S Woop Dv! Pured Oak NO. 120 \n yeh atl ferisdé UR book gives complete instructions for finishing all wood—hard or soft—old or new. Tells how inexpensive soft woods such as pine, cypress, birch, etc., may be finished so they are as beautiful and artistic as hard wood. Explains just what materials to use and how to appl) them. This book is the work of experts—beautifully illustrated in color —gives covering capacities— includes color charts, etc. Johnson’s Wood Dye Johnson’s Wood Dye is very easy to apply —it dries in four hours and will not rub off or smudge—penetrates deeply, bringing out the beauty of the grain without raising it. Made in seventeen popular shades, which may be easily lightened, darkened or intermixed. Full directions on every label. i~---—----- - . C. JOHNSON & SON, P ©... 6, RACINE, WIS **The Wood Finishing Author ties”’ | j (Canadian Fr .ory—Brantford) Please send-“T_, free and paid, your | Instruction Book on Wood Fir’ dug and Mieee | Beautif ying. MY DEALER 1S....... “AF OE en ee | Address hd S State — = on an ow om ow aon a on eal } SERVICE | DEPARTMENT li) ) JOHNSON / ARTISTIC wooD FINISHES Johnson’s Wood Dye has many uses, for both the artisan and amateur. Architects and contractors specify it for coloring woodwork and flo ring in new buildings. Painters and decorators use it with equa! satisfaction on new and old woodwork of all kinds. Housewives delight in it for doing over old furniture and for coloring reed and wicker baskets, etc. Man- ual training teachers and pupils use it for finishing their models. Upholsterers, furniture re- pairers and cabinet makers find it ‘just the thing” for their work —old and new. S.C. JOHNSON & SON **The Wood Finishing Authorities” : Racine, Wisconsin POPULAR MECHANICS PRESS

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See how easy it is in your spare time to ride around, show and take orders for Mellinger, Hand Made, Oversize Cord Tires. Money rolls in; your prices defy competition; 70,000 users endorse these 12,000 mile guaranteed Tires. Big saving to tire buyers. I send you FREE the Master Salesman Kit as illustrated and if you will boost Mellinger Tires 1 have a surprising offer that will give you one of these oversize Cords Free for your own car. Earn Big Money I don’t ask you to risk one cent. Make your car an asset, not an expense. No matter what you have been doing, whether you live in the city or country, the MELLINGER PLAN starts you in business, all or part time and without capital or experi- ence. Store keepers, farmers, garagemen, clerks, young fellows discontented with mere jobs at. small salaries, all sorts of people got this MELLINGER PLAN and their financial success was remarkable. 12,000 Mile Guarantee and lowest wholesale prices in A merica Saves car owners money and amazes everyone; makes money roll in for Mellinger Agents. Write me Right Now and get my inside figures and discounts, toget her with full details of the MELLINGER PLAN which is unequalled in © money making possibilities. I will prove to you that it is the biggest opportunity you ever heard of. ship tires prepaid on approval \NEW BALLOON TYPE CORD Now Ready. Greatest achievement in tire history. Fits any wheel or rim. Noextraexpense. Greater Mileage—Greater Com fort. Sidewalls more flexible—30% lower air pressure. Send SUCCESS LIKE THIS Yours | ™* ; \, Elbert trwin, Indiana, sells 34 tires Marshall Demoret, an Ohio Master Saiesman , for ects pring ings. , qual » \ and 34 tubes amounting to more of all loing pring fan- spils than $600 in cash in one month He got a free set of tires and profits of $210.00. Keighey, Idaho, selis $900; Hircheliffe, Pennsylvania, sells $1500 the first month; Franklin, Pennsy!vania, sells $600 a month Thousands of others cashing in. DOK agent, within six months after his appointment is ordering 14 tires at a time. On just one such order his profit at regular retail prices is over $60.00. George Zecher of Illinois got a free set of tires and on his first month's sales orders netted a profit of approxi- mately $116.00. Kit FREE and in 5 minutes you can demonstrate tire secrets the average dealer knows nothing about. All in well bound portfolio with good size sam- ples of fabric, cord, rubber, cross sections cut from tires and pure gum tubes. poem If you own a car SURRU EER ER SEER Ree eee ; find ¢ peggy buy anyone’s tires until you see these amazing, values on ne Mail This er 7 n Now! work a ae INK OF IT. Oversize Cord Tires for less than fabrics used to phn nger, o one bed Coreen a piallinger agent in your neighborhood, I waat one 1745 Grand Ave., Kansas City, Mo. oo * ecommen ellinger Tives. I will ship these magnificent Cord . a eal , atin Ciba « . UPON the first from your locality to get my confidential offer. MAIL ff oe —y ne Fg nig —— and ao l N TODAY—RIGHT NOW. Don’t miso it without investing money, I can become your au DN : oe @ thorized agent and get a free tire for my own use. B. L. MELLINGER, President a LINGER TIRE & RUBBER CO. = RAND AVENUE KANSAS CITY, Mo. @ es: Any Bank or Trust Co., or Any Publication. Capital $600,000.

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SOO’ OS eI ONG > } i ’ an € \\ ~-\ “ ~ , — a . * ’ ? —— . 45 minutes toasting develops its aristocratic flavor — the enormous production makes possible its democratic price LUCKY STRIKE “IT’S TOASTED”

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