Modern Mechanix, May 1937

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ND INVENTIONS BIES A A FAWCETT PUBLICATI AODERN MECHANIX HOBBIES iN 15 CENTS.

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S. S. VAN DINE lar mystery Celebrated author of popu ; y thrillers and creator of “Philo Vance ‘PATHERE they are! Not more'n a quarter mile ahead of us. We'll overhaul 'em before they reach the Bad Lands." Sergeant McCabe's voice was excited and triumphant. And just then a sharp explosion rent the air, and the police car leaped from the narrow road and lurched crazily to a sudden stop in a rock-strewn sandy field. “A blow-out!” snarled the driver. In the distance the faint tail-light of the criminals’ car could be discerned, rapidly disappearing into the now un- broken blackness. "No chance now," the Sergeant complained sullenly. "They've escaped." 'The criminals did escape that time. But, thanks to the persistence of Sergeant McCabe and his men, they were later captured. a * Names and localities are fictitious, but the episode is sug- gested by an actual occurrence. 40-50-60 MILESAN | HOUR! THEY ALMOST HAD | THEIR MEN WHEN === 4 BANG ! A BLOW-OUT! , Read S. S. Van Dine's breath-taking description of Sergeant McCabe's* thrilling man hunt It's bad enough to have a man-hunt frustrated by a bursting tire. Think of how terrible it must be, though, to . have an innocent, carefree motorist start off ona pleasure trip only to have a blow-out catapult his car crazily into anything that blocks the way. The solution to all this havoc on the highways has seemed to me to depend on the manufacture of a safer tire. That's why the inven- tion of the Life-Saver Golden Ply by Goodrich should be the "Good News" to every American Motorist that it was to me. As one of the Goodrich engineers explained, “This Golden Ply, which is now found in every Silvertown Tire, is a layer of special rubber and full-floating cords, sci- entifically treated to resist the terrific blowout- causing heat generated inside æl tires by today's high speeds. By resist- ing this heat, the Gold- en Ply provides mo- torists with rez/ pro- tection against high- speed blow-outs.” No wonder thou- sands of motorists are changing to Silver- towns. Silvertowns below mean safety above. Remember, you can purchase these at Goodrich Silvertown Stores and Goodrich dealers everywhere. Goodrich SAFETY Silvertown With Life-Saver Golden Ply Blow-Out Protection

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„$. E. SMITH, President, National Radio The man who has directed the home study training of more men for the Radio Industry than any other man in America. $, Broadcasting Stations Employ managers,, engineers, operators, in- stallation and maintenance men for fasci- Dating jobs and pay up to $5,000 a year. Set Servicing Gpare time set serv- ücing pays many $5, 810, $15 a week extra while learning. Full time servicing pays as much as $30, $50, $05 a week. Loud Speaker Systems Building, installing, servicing and operat- ing public address systems is another growing fleld for men. welltrainedin Radio. HERE'S PROOF THAT MY TRAINING PAYS $80 Monthly In Spare Time “I work on Radio part time, still holding my reguler Job. Since enrolling five years ago, I have apoge around $80 every month," JOHN B. MORISSETTE, 173 Süver Street, Manchester, N. H. Makes $50 to $60 n Week “Tam making between $50 and $60 a week ‘after all expenses are paid, and Y am getting ail the Hadio ‘work I can take care of, thanks to N. R, T. H.W, SPANGLER, 908 Walnut St., Knoxville, Tenn, Operates Public Address System *'I have a position with the Loe Angelea Civil Service, operating the Public Ad- dress System In the City Hall Council. y nalary is $153 a month.” R. H.ROOD, » 136, City Hall, Los Angeles, Calif. elevision Many Radio Experts Make Be a RADIO and EXPERT JU, $50, 575 a Week WILL TRAIN YOU AT HOME IN SPARE TIME Do you want to make more money? Radia offers you many opportunities to make good money in your spare time while getting ready for a full time job. Mall the coupon below. Find out how you can train at home to be a Radio Expert—and how you can get the training you need to cash in on Tele- vision’s coming opportunities, You dont have to glre up your job, leave home, or spend a lot of money. I will train you at home in your spare time, Train at Home—Get Ready Now For Jobs Like These Radio already gives jobs to more than 300,000 people. Radio broadcasting stations employ engineers, operators and station managers and pay up to $5,000 a year. Spare time Radtlo set servicing pays as much as $200 to $500 a year—full time servicing jobs pay as much as $30, $50, $75 a week. Many Radio Experts own their own full time or part time Radio businesses. Radio manufacturers and jobbers employ testers, inspectors, foremen, engineers, service men, paying up to $6,000 a year. Radio operators on ships get good pay and see the world. Automobile, police, aviation, commercial Radio and loud speaker systems offer good opportunities to well-trained Radio men. Men I have trained at home make good money in all these branches of Radio. Television Will Offer Many Good Jobsito, Well Trained Men Tn the past fifteen years, Radio has grown from an experinenter's plaything to one of the country's great industries, And Tele- vislon today la as advanced as Radio was 15 years ago. Already millions of dollars have been spent developing Television equipment, Television receivers re been built which produce images equal to home moving pictures. About twenty experimental Television stations have already been licensed. N. R. I. not only glves you the training you need to make good money in Radio now, but In addi- tion, gives you Television training which will help you cash in on the profltable opportunities coming with "Television. "i Many Make $5, $10, $15 a Week Extra in Spare Time While Learnin g But you do not have to walt until Telcvislon arrives to cash in on my Training. You do not even need to wait until you have fin- ished my Training in Radio and Telcvislon. Radio offers , many oo0d-pay opportunities NOW! Every neighborhood needs a good spare time serviceman. The day you enroll I start sending you Extra Moncy Job Sheets. ‘They show you how to do Radio repair jobs that you can cash in on quickly. Through- out your Tralning I send plans and ideas that have made good spare time money for hundreds of fellows. My Money Back Agreement Protects You I am so sure I can train you successfully that T agree in writing to refund every penny you pay me if you are not satisfied with” my Lessons and Instruction Service when you finish. T11 send you a copy of this agreement with my Free Book. Special Radio Equipment which I supply elves you practical experience—I show you how to conduct experiments and build circuits which illustrate important Radio principles. Find Out What Radio and Television Offer You Act today. Mail the Coupon now for my 64 page book, “Rich Rewards In Radlo.’ Its sent froe to any fellow over 16 years old. It describes Radio's spare time and full time opportunities and those coming in Television; tells about my Training in Radio and Television; shows you actual letters from men E have trained telling what they are doing and earning. Find out what Radlo offers YOU! MAIL THE COUPON In ag Shyelope: or paste it on a penny postcard— J. E, SMITH, Pres., National Radie institute, Dept.7EH Washington, D. C. This Coupon is Good For ... One FREE Copy of My Book Dear Mr. Smith: Radio and Television. NAME ADDRESS CITY - J. E. SMITH, President, Dept. 7EH National Radio Institute, Washington, D. C. Without oblizating me, 3e Which points out the many spare time and full time opportunities in Radio, and those coming In Television—explains how you train men at home in their spare time for (Please write plainly.) please send “Rich Rewards In Radio'' 1 L| L| s S EE eager an uam eer E nna | When Answering Advertisements Please Mention May Modern. Mechanix 3

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PRICE 15 CENTS 1937 SAME PRICE Volume XVII IN CANADA Number 1 Circulation over 250,000 Copyright 1937 by Modern Mechanix Publishing Co. NEXT MONTH SPECIAL FEATURES Just Another Gadget Brings Inventor $350,000 - - - - - + 32 By H. H. Slawson Building Lilliputian Railroads - - - 36 By A. C. Kalmbach Mechanizing The Mounties - - - - 42 By J. R, Robinson Succumbing to the fure of the open road thousands of new enthusiasts have pur- 50 chased or constructed trailers in which to Science Finds New Aids For The Deaf live the carefree life of a modern nomad. Of unquestionable value to trailerites By Josephine Timberlake will be the authoritative and timely article y p titled "Housekeeping In A "Trailer," ap- pearing in our June issue. Written by Esther Hall, noted authority on the subject, the article details the household They Call Her “The Lady Edison" - = 58 equipment that should be carried on 5 trips to insure cea conor while using a minimum o e necessarily By Aubrey D. McFadyen limited trailer space for storage purposes. Largest U. S. Air Liner Ordered - - - 61 FOR WORKSHOP FANS Among the many interesting projects included in the June issue : will be—the first installment of By Robert Page Lincoln Building the Arlen Special, a Proper Accessories For Trout Fishing - 62 midget dirt track racer; a 5-meter : Portable Short-Wave Transmitter; “Ifs” Of The Great Titanic Tragedy - - 68 How To Build Playground Equip- ment; Hammered Aluminum Ware By Karl Baarslag Projects; Garden Furnishing Pro- jects, and other workshop plans, [Continued on page 8] suggestions, and practical kinks. Published monthly by Modern Mechanix Publishing Co., Fawcett Bldg., Greenwich, Conn., U. &. A. Entered as second-class matter under the Act of March 3, 1879, at the post office in Greenwich, Conn., with additional entry at Louisville, Ky. Editorial offices: 1501 Broad- way, New York. Not responsible for unsolicited manuscripts. In U. S. and Possessions and in Canada, i5c a copy; $1.50 a year. Other Postal Unions, $2.00 a year. Printed in U. S. A. Advertising forms close the first of second month preceding date of issue, Advertising offices: New York, 1501 Broadway; Chicago, 360 N. Michigan Ave.; San Francisco, Simpson-lteilly, 1014 Russ Bldg.; Los Angeles, Simpson-Reilly, 536 S. Hill St. Member Audit Bureau of Circulation. Editor, Tom Mahoney; Associate Editors, Thomas A, Blanchard. John L. Scherer, Clifford Peters; Hunting and Fishing Editor, Robert Page Lincoln; Naval Architect, S$. S. Rabl; Art Director, Al Allard. Photos by Acme, Brown, Globe, Harris & Ewing, Internatlonal, Pictures, Underwood, Wide World services. 4

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e Ir RUSTY BRAINS did squeak, no one would have to warn you against trying to get ahead in a modern world with antiquated training! Keeping your brain modern is just as important as keeping plant equipment modern. The best way to keep your brain up to date is to keep your training up to date. The business of modernizing men's training is the business of the International Correspon- dence Schools. All over the world men testify to the effective- ness of I. C. S. training — and if you are stuck on a job, if your pay envelope is too thin, this coupon can be the first step towards changing the whole course of your life. O Architect O Architectural Draftsman Q Building Estimating O Contractor and Builder Sheet Metal Worker Boilermaker Telegraph Engineer Telephone Work O Radio Mechanical Engineering Mechanical Draftsman Machinist O Toolmaker Patternmaker Diesel Engines Aviation Engines [] Automobile Mechanic O Refrigeration 5 Structural Draftsman Structural Engineer Management of Inventions m D go z Electrical Engineer Im QO u LICICICIECIETEIET Electrie Lighting Welding, Electric and Gas Reading Shop Blueprints Heat Treatment of Metals O Bookkeeping O Secretarial Work DO Spanish French O Salesmanship O Advertising O Business Management O Industrial Management O Traffic Management O Accountancy Li Cost Accountant L1 C. P. Accountant O Home Dressmaking O Advanced Dressmaking O Professional Dressmaking and Designing Igor PN CENE IA V MEIER n TE I Iam SPON. INTERNATIONAL CORRESPONDENCE SCHOOLS - BOX 2324-L, SCRANTON, PENNA. * Without cost or obligation, please send me a copy of your booklet, ^Who Wins and Why," and full particulars about the subject before which I have marked X: * TECHNICAL AND INDUSTRIAL COURSES 10 Plumbing Heating Air Conditioning Steam Engineer Steam Electrie Engineer Marine Engineer R. R. Locomotives R. R. Section Foreman Air Brakes [] R. R. Signalmen Highway Engineering Civil Engineering Surveying and Mapping O Steam Fitting O Ventilation LICIEGICOCOLCICE BUSINESS TRAINING COURSES O Service Station Salesmanship [] First Year College Subjects O Business Correspondence [] Stenography and Typing O Civil Service O Mail Carrier L] Railway Mail Clerk DOMESTIC SCIENCE COURSES O Millinery O Bridge Engineer Bridge and Building Foreman Chemistry Pharmacy Coal Mining Mine Foreman Navigation Cotton Manufacturing Woolen Manufacturing Agriculture Fruit Growing Poultry Farming O Fire Bosses oooooo00o0o0o00 O Grade School Subjects " O High School Subjects O College Preparatory O Illustrating O Cartooning O Lettering Show Cards Œ Signs O Foods and Cookery L1 Tea Room and Cafeteria Management, Catering If you reside in Canada, send this coupon to the International Correspondence Schools Canadian, Limited, Montreal, Canada When Answering Advertisements Please Mention May Medern Mechanix

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A frank man to PATENTS-INVENTIONS HE world of invention moves on. About a hundred years ago people were saying, *"There's nothing left to invent”—today we know that is one of the funniest things ever said. Just think what has happened in the last hundred years! Autos, radios, airplanes, and thousands of useful, practical devices for home, shop and office have been invented and put on the market. Inventors are con- stantly making the world a better place to live in. Did you see a notice in the paper that an obscure worker, Hans Wach, has invented a simple device to utilize exhaust steam on steam boats. Already, the report states, the steam ship lines have saved more than $15,000 in fuel bills with his invention. Almost in the same breath the Dept. of Commerce announces that it will soon test out a new non- crashable aeroplane, which the average man can learn to fly in a day, which will travel at 110 miles an hour and sell at the price of a cheap automobile. An unknown Seattle man has invented a robot to go 5,000 feet under the sea and recover millions and Who Are Inventors? Can You Answer millions of dollars worth of gold lying at the bottom of the ocean since the days of the early Spaniards. Remember this: For every outstanding big inven- tion there are thousands of small, simple things for use in the home, the office, the factory, on the farm, on every sort of travel conveyance. Little articles like you find on the counters of a 10-cent store, hardware store, drug store, toy and novelty shop. Many Little Ideas Have Big Commercial Possibilities A person finds something he’s using doesn’t work right, or it’s clumsy, or costs too much. He gets a happy thought. He improves the old Article. That’s contribution to human progress. That’s the way that many, many men have reached the goal of financial comfort, independence and even wealth. Most of the things millions of us use didn’t come from the brains of engineers and physicists. They came from the mind and maybe the crude home work bench of Mr. Average Man, busily engaged in earning his bread and butter at whatever chance or circumstance has given him to do. The “little” man’s opportunity as an inventor was never greater than it is today. Our Business Is To Help You’d be amazed at the men we con- tact in the course of a busy year. Most of them do not consider themselves inventors at all. During their work or leisure they get an idea. They work it out on paper. They get in toueh with us about Protection. É Did you know that a dentist invented the stock ticker, a school teacher the telephone, a farmer the typewriter, an artist the telegraph? Did you know that the crinkly hair pin—sold by millions now—came about because a husband saw his wife twisting the old-fashioned straight hair Din to make it stay in place? Poor men who have no thought of invention now will be financially well-fixed in a few years because of a happy thought that the world could use to advantage. These Questions? Ask yourself these questions: How do the Patent Laws protect me? What casy steps ean I take, without cost, to put myself in position to support my belief that I am the first man to think of my invention? Is a Patent worth the cost? Do I need a model? Should I try to sell my invention before I have it Patented? Is there any safe, business-like way to secure financial help? If : I do apply for a Patent p how shall I reach people who can market my invention? Can I protect and sell an improvement on some invention thai has already been patented? These are but a few of the questions whieh usually confront the average man. You need the answers! YOU CAN HAVE THEM, without cost, trouble, or delay. Copyright 1936 Victor J. Evans & Co. You. Write Us Today For more than thirty-six years, this firm has been helping men with an inventive turn of mind, We maintain a large staff of trained, experienced specialists—Registered Patent Attorneys, Draftsmen, and Searchers to help our clients secure all the protection to which they are entitled. Fees are reasonable, De- ferred payments frequently arranged. Ques- tions promptly answered. Write us frankly with absolute assurance that what you say will be treated with strictest secrecy. But FIRST, send for the FREE BOOKS shown on the op- posite page. They are filled with facts, pic- tures and suggestions. They tell you things about Patents, Inventions and Selling Inven- tions that we have learned in our long experience. They may save you time, expense, EVEN LATER DISAPPOINMENT. Simply fill in the coupon. No charge, no obligation. Write us today. RUSH COUPON TO WASHINGTON. D.C. TODAY 6 Accept No Substitutes! Always Insist on the Advertised Brand}

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man talk about os INVENTIONS " NEW BOOK About Selling INVENTIONS So far as we know, the facts in this booklet have never before been pub- lished by any Patent At- torney. You are given very definite suggestions '"When and How c Sell an Inven- tion." It also comes to you R. 115 Mechanical Move- ments Like These Besides many other features and facts there are 115 differ- ent mechanical movements and principles in the big, 48-page Book below, Maybe there is just the idea you need to solve some mechanical problem, Use the coupon or write us a card or letter. FREE BOOKS with 68 PAGES of Facts and Pictures! VICTOR vans & Co. WASHINGTON, “When and How to Sell REGISTERED PATENT ATTORNEYS, MAIN OFFICE: 220. B VICTOR BUILDING, City or Town.....,..e.ece eee Other Offices: 1007; a m Ridg. New York 1445-B Monadnock Bldg., Chicago 514-B, Empire Bldg., Pittsburgh 1010-B, Hobart Bldg., San Franelsco 736-B, Security Bldg., Los Angeles Send me FREE copies of your books, “Patent Protection’ and an Inrentlon.' (Note: Same books supplied by any of branch’ offlces listed above.) When Answering Advertisements Please Mention May Modern Mechanix

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a " 4 7A ^59. ARC WELDING New low prices on modern 40 Volt “Simplified” Aro Welders make this big pay business available to shops that nover before could afford it. Itopena the doors to the bigger profit iobs. The new IIo- bart is easier to operate, much faster. This je toe day's opportunity. Don't mies it, Build Your Own Portable Welder with Hobart Generator Junit and/cuto engine or chassis. Leta you Xonerete eny place, especially on the profitable outeide jobs. Easlly raven Tyou, $300 to $500. Portable Electric . New low cost on &msll sizes ae wel, as large. The most profitable ero welder your&hop can own. Welds faster, better, easier, saves current. Easy to Operate Hobart Welders have “Simplified” oper- ation, This meana fester welding—with the right current for every job. Hobart is simplified, so any of your men can weld easily and successfully. The myste and uncertainty of obtaining correot weld- ing current settings are removed, 60% Extra Capacity Over old stvle 25 Volt Welders—neces- - sary for welding with the new coated roda, Automatic reactance lets you hendle light welding work without losing the aro. Users don't understand how they got along with the old style welders after using this new Hobart. Remote Control vat no extra cost with Hobart. ‘Think of being able to control your welder from any working point. Saves time, temper, and eliminates the necd for & helper on overhead or concealed work. “Pays-For-Itself” Terms Extra earnings and savings make it easy for you to own a Hobart without expense toyou. You cen even renta new Hobart —and later purchase it without loss of rent. Check Rental Purchase Plan, GET THIS VALUABLE MANUAL Bent Free if you will tell us the. welds ing you plan doing. P HOBART BROS., Box $M57.. Troy, Ohlo Tell me more about— € ) Building My Own Portable ( ngine Drive ) 30 Daya’ Trial~ Welder €. ) Electrio Drive Weldor € Easy Torma $ ) Rental Plan Privilege of Purohsse. ) Send FREIE Manual on Welding. Attached letter telle sbout the work we want to do, Name........ PORTABLE ) Complete Gas ONE OF THE WORLD'S" LARGEST. "BUILDERS OF ARC WELDERS 2400 Degrees F ?! BRONZE FOUNDRY for School and Home Workshops Complete Foundry Outfits are available In three sizes and make it possible for you io produce beautiful bronze, silver or alu- minum castings in your home workshop. Presents such as book ends, ash trays, dishes, paper weights, letter openers, bot- tle openers, Statuary, ctc., can be quickly made by the sand casting process. Exist- Ing objects can be used as patterns, and sand moulds made in a few minutes’ time. Previous experlence unnecessary, Domes- tic gas supply and 110 volt 60 cycle en- ergy required for operation. Size Cruclble Shipping _ Wt. Price Capacit: wt. Casting Complete 351 cu. in. 25 lbs. ll^ Ibs. $13.50 352 12 cu. in. 40 lbs. 3 lbs. 19.00 353 24 cu. in. 65 lbs. 6 lbs 27.50 — zd Above price includes Universal high speed blower. Forl $ blower good on 110 volt 60 cycle only, deduct $4.00. Aluminum, Casting Alloy 30c per lb. Prices f.o.b. K. C. Check or money order acceptable, express charges C. O. D. Write for crollate WANSAS CITY SPECIALTIES CO. P. O. Box 6022 Kansas City, Mo. CONTENTS—Continued from page SHORTER FEATURES Aviation's Future—A Guest Editorial - - 31 By Burdette S. Wright, President Curtiss Aeroplane & Motor Co. Bombs And Radio Used In Survey Of Hudson Gorge - - - - =- - = = = 40 Mechanical Devices Help The Blind =- = 4 Mechanical Devices Feature Show - = 48 Along The Air Trais - - - = = = = 56 Spectacles Pierce Fog And Haze - 66 Giant Camera Film Census Data = = © - 77 Household Aids For Milady - - 86 HOW-TO-BUILD FEATURES Flying Cloud - =- - - - =- = = - œ 79 Hors-d'euvre Tray Is Simple Shop Project 89 A Gas Mask For Fumigating Purposes - = 90 Rope Stunts For The Amateur Escape Artist 94 Runlite—A Compact Traveling Bedroom - 96 Completing Midget Mike - - - - =- = 104 Novelty Projects Made With Walnut Shells 108 Battery Operates All-Wave Farm Set - - 110 Build This Automatic Washer For Film And Print Developing - - = = = = = -114 INTERESTING SCIENTIFIC ITEMS Rubber Fills Tree Cavities - =- = = = - 35 Aero Radio System Devised = - = e = 41 Tuner Brings In Television And Broadcast Stations - - ------- = = 4 Powerful X-ray Machine To Aid Cancer Research = =- =- = = > = = œ «= = 67 NEW MECHANICAL INVENTIONS Pencil Holds Memo Paper = = = = = = 34 Roaster Prepares Full Meal e = = © = 34 Mechanical Elephants Walk 500 Miles - - 41 Tractors Launch Life Boats - = = - = 4 Device Indicates Excessive Speeding Of Autos 46 Huge Pantograph Developed - - - - - 46 Popular Planes Go Amphibian +e =- = = = 49 Electro Magnets Clear Roads e æ = 49 Extra Wheel Aids Trailer - = e e e ə 57 Clipper Bus Is Introduced +- = = = > - $7 [Continued on page 12] 8 Accept No Substitutes?! Always Insist on the Advertised Brand!

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TODAY... Almost Broke! Yet tomorrow Tom Smith will be on his way toward being a really successful man... OMEWHERE there is a Tom Smith—that name is as good as any—who is practically flat broke, back on his heels and discouraged today. Perhaps he's in debt. Perhaps, as far as his job is concerned, he'sin a rut. Per- haps he's just a victim of these trying times. Yet—he still has vision, imagination, And—ambition. He still believes that he's going somewhere . . . somehow, some way, some time. He hasn't given up hope. He still be- lieves in success and opportunity. . : . Tom Smith will read this advertisement. No—there is a better way of saying it. Tom Smith will study this advertisement. He will read it once, then again, then yet again. It will strike a responsive chord somewhere within him. It will stir his dormant ambition, give wings to his imagination, set his vision afire. And he will aci! As though Hope—as swift and powerful as lightning when it strikes—had suddenly taken pos- session of him, he will take advantage of the oppor- tunity this advertisement offers him. And then— Six months from now, his friends will say, “Have you heard about Tom Smith? Yes—just got a new job with an increase in salary.” And two years later, the business journals in his field may report, “Thomas Smith Appointed Manager.” And five years... or ten .., Or fifteen years hence, the sign on his office door may read “Thomas Smith, President.” All because Tom Smith had the vision, the imagina- tion, the ambition, to recognize the significance of this advertisement. Because he had the foresight to see that here was his way to opportunity. kok k This page advertises.the training of LaSalle Extension University. It is a unique university in many respects. It utilizes Uncle Sam's postal ser- vice in its contacts with its stu- dents. It is the university for those men and women who work by day in every type of business and profession. It is the university of the clerk ambitious for success in accountancy. It is the university of the business man with an eye upon an executive position. It is the "i(aREBESEUUSESSEBBSUBERENEURSSEXGEUUSBERERRUDURDROSURREBBRSEOREUESENESBARNESNBUR LA SALLE EXTENSION UNIVERSITY, Dept. 5493-8, Chicago Iam in earnest about my success and I would like to have your special booklet-—without any cost or obligation to me—about my opportunities ‘and your success training in the business field I have checked. E Business Management O Higher Accountancy t] Traffic Management O Modern Salesmanship O Commercial Law O Law: Degree of LL. B. DO Expert Bookkeeping 1 O C. P. A. Coaching O Modern Foremanship Lj Business English D Effective Speaking D Office Management O Stenotypy Position... LL c sc cra Address: 222 sess wescessceeceses D Industrial Management O Personnel Management O Business Correspondence LaSalle Extension University university of men and | | women, young and mid- ~~. y dle aged, who wish to 4 become accountants, bankers, sales managers, traffic experts or specialists in some one of twenty different fields. In short, it is the university for ambitious people, determined to succeed, who recognize that only by thorough specialized train- ing can they reach their objectives. : n the history of LaSalle Extension University, there have been more than 850,000 such men and women. They have gladly substituted night hours of study for night hours of aimless pleasure. They have sacrificed hours of minor enjoyment to reach years of major suc- cess. They have studied hard—accumulated the accu- rate, comprehensive and practical training LaSalle offers by its famous Problem Method—thus wresting from Life the success which long before many had thought was not for them. The LaSalle Method is comprehensive, yes. It is accurate, up-to-the-minute and alive. It is invaluable training. But above all things, it is a Road Toward Success. It is not an easy road. It is not the road for sluggards, for those who refuse to sacrifice and work. Rather, it leads to their destination only those who have the will to finish what they have once begun. xo k OR Perhaps you think that prophecy of Tom Smith's career mentioned above is pure fantasy, Perhaps you feel it is solely the product of an advertising writer's imagina- tion. If such are your beliefs, you are wrong. For that prophecy is based upon past experience— The past experience of thousands of discouraged Tom Smiths who read just such an advertisement as this years ago. Tom Smiths with vision and ambition and imagination who accepted LaSalle's offer of one of the booklets listed below. And—who found the booklet so intriguing, so full of hope, that they enrolled in LaSalle .. and as the months passed, they found themselves rising out of thcir rut, reaching toward more attractive and better-paying jobs. Finally, achieving rich and deserved success in their chosen lines. Tom Smith, wherever you are, whoever you are, whatever are your ambitions—here is your opportunity! Are you going to pass it by? Ask for one of these booklets—or a similar one on your own field of | business. They are free! When Answering Advertisements Please Mention May Modern Mechanix 9

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STEP NO. ONE Make a rough pencil sketch of your invention, describe it fully, and send it to us for pre- liminary search through United States Patents in the U. S, Patent Office. : STEP NO. TWO Our trained searchers will then make a preliminary search of the pertinent U. S. patents to determine if your invention is probably patentable. STEP NO. THREE Our complete report of search and opinion on patentability will be mailed to you with copies of U. S, Patents that we consider nearest to your in vention. 3 STEP NO. FOUR If you decide to make patent application, for customary fees explained in our booklet, our draftsmen will make drawings and proper papers will be pre- pared for presentation of your invention to the Patent Examiner in U. S. Patent office. 10 Accept No Substitutes! KNOW HOW TO START KNOW EACH STEP TO TAKE Before Going too Far with Your Inventions . Very often, the patent procedure is what we call a ‘‘simple’? one— as illustrated here, Our FREE BOOK, ‘‘Patent Guide for the In- ventor,’’ describes what to do and how to go about it. Send for it by all means—let us urge, however, that you take the first step (Step No. 1 at left) without further delay. It will prevent wasted work, mis-steps, and going ahead ‘‘in the dark’’—your whole patent pro- cedure depends upon the first step. If you have an invention that is patentable—and want to secure for yourself your inventor's sole right to profit from the invention—you can't afford to lose time in securing the protection of a U. S. Patent. Other inventors may be working on the same thing right now. Should they develop this invention and file patent applieation before you do—the burden of establishing priority will be upon you. Our Big Book—''Patent Guide for the Inventor’’—will tell you the quickest possible way to secure Patent Protection for your invention. SEND FOR IT TODAY! Immediate Search Necessary A Search at the U. S. Patent Office will disclose one of three things: That you have hit upon an entirely original invention—that you have suggested patentable improvements upon an existing invention—or that your invention has been anticipated throughout, and you should drop it. You should have this information at once. The next steps (the whole procedure of obtaining a patent) will be thoroughly ex- plained to you in our FREE BOOK. Our FREE BOOK tells everything you need to know about patents. We will mail this book upon receipt of your letter requesting search —or if you want to read it before having search made, simply fill out the coupon on opposite page. FREE RECORD OF INVENTION è o o This FREE Record of Invention Form ene ables you to make in convenient form a sketch of your invention and have it wit- nessed in a manner of value to you should the occasion for evidence arise, MAIL THE COUPON TODAY and ob- tain our FREE BOOK and Record of Invention Form, CLARENCE A. O'BRIEN & HYMAN BERMAN 317-Z Adams Bldg. Washington, D. C. Registered Patent Attorneys Before U. S. Patent Office Always Insist on the Advertised Brand!

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DELAYS ARE DANGEROUS IN PATENT MATTERS The Free Book shown here was prepared for inventors, to show them exactly what steps they must take to secure a PATENT. ONCE, must furnish your attorney, and what steps he must take in order to protect your interests, member, inventing an article is one thing —securing the exclusive right to manu- facture it, use it, or sell it is another. Without a U. S, Patent, you cannot expect to reap the profits that your invention may make possible. Send at once for this book. After you get that, you'll know exactly what to do to protect yourself. WHAT A PATENT DOES FOR YOU Every year thousands of Patents are granted. Very few, however, represent the discovery of entirely new principles, Most of them provide new methods of do- ing some everyday thing in a better way —changes for greater efficiency, useful- ness, adaptability, or beauty in some pre- viously Patented thing. These IMPROVE- MENTS are Patentable if new, and ac- tually represent new inventions. These improvement Patents offer large chances for profit if commercially useful. The business world wants improved products and services. WE SERVE YOU QUICKLY AND SECRETLY Anything you write us or send us is strictly confidential between us. All letters and drawings are kept in strong, steel, fireproof files, which are open only to ourselves or authorized members of our staff. We have se- cured patents for inventors located in every state in the Union. Our organi- zation is a large and efficient one. Our practice is confined entirely to Patents, Trade-Marks, and Copyrights. We have had years of experience in Patent Matters. When you place your invention in our hands, we are in posi- tion to proceed at once to secure pro- tection for you, Our fees are reason- able, and, if you desire, we can arrange convenient terms of payinent, IMPORTANT! Please understand that you are not under the slightest obligation in send- ing for this book. We will mail it, together with the Record of Invention form, the same day we receive your request, Use the coupon to save your- self time and trouble. After that, you will be in position to proceed or not as You choose, to make your application for a patent. If you have an J r It will tell you exactly how an application for a Patent is made, what information you invention, you should send for this book AT Re- THIS FREE Book e o o o sells How How your Patent Ap- plication is made; e what kind of sketches or drawings are nec- essary; what other papers must be made out; how the Patent Laws protect you; why it is important to avoid loss of time in getting your application É filed; and many other important points. Even a very simple in- vention, if new and useful, may prove very valuable. You may have much to gain and nothing to lose by sending for this book TODAY. CLARENCE A.O’ BRIEN -E€ HYMAN BERMAN 317-Z Adams Building WASHINGTON, D.C. REGISTERED PATENT. ATTORNEY: _ BEFORE U.S. PATENT OFFICE AL Please send me at once your Big Free 48-Page Book, “Patent Guide for the Inventor" and your Specially Prepared “Record of Invention" form. This request I does not obligate me. - LI NANI siter anno At "TR sew d PLEASE WRITE OR PRINT NAME PLAINLY 1 1 ADDRESS ............. tse linn el E ET - a a [| ee TE oe ee ee eel When Answering Advertisements Please Mention May Modern Mechanix 11

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The amazing performance of the Diesel powered Burling- ton Zephyr trains has opened a new era of power efficiency, Air- planes, automobiles, great industrial plants will soon be using these mar- velously efficlent englnes. This means a new profession, a new trade for thousands of men. Learn Diesel op- eration, construction and repair NOW through our brand new quick reference cyclopedia, the only complete encyclo- pedia on Dlesel Engineering. 5 Big Books Shipped FREE for examination. If you want to get into the most promising new field of ihe century, the livest, most up-to-date, most talked of profession, send for these books on our amazing free shipment offer. Over a thousand pages profusely illustrated and right up to ihe minute. Examine these books, read them, test them and if not thoroughly satisfied return them at our expense and you won't owe us one cent, > Consulting Membership Included Send now and we will include without extra charge a ono year consulting membership in the American Technical Society with privilege of consultatlon wilh our engineers on any difficult problem. AMERICAN TECHNICAL SOCIETY Drexel at 58th Street, Dept. 05320, Chicago, Illinois. You may send me the new 5 volumes on Diesel Engineering for ten days free examination. I will pay the few cents express only. Will examine the books and return them in ten days unless I decide to keep them, in which case I agree to send you $2.00 in ten days and $3.00*a month untll the introductory price of only $15.80 is pald. Name Address city State -.-___--- Please attach a letter giving age, occupatlon and the name and ed- dress of your employer and that of at least one business man as refer- ence. BE A POULTRY EXPERT Make $1000 to $2500 a Vear Free book shows how to get started quickly, You'll be surprised at the amazing profit opportunities in the poultry business, Wherever you live—whatever you do—it is easy to start on a spare or full time basis. Free book telis all. Send for “How to Raise Poultry for Profit." Learn at home in spare time. The famous N. P. I. home- study course ts endorsed by colleges and leading poultrymen. Know how to get the maximum profits from interesting, healthy work. Iron- clad agreement protects you. We have prepared hundreds for good jobs and businesses of their own. Write now for free book. No obligation. National Poultry Institute, tnc., Dept. 139-B, Adams Center, N. Y. $ 3-IN-ONE OIL IS A BLEND OF THREE FINE OILS, FOR BICYCLES, TOYS, SKATES, LIGHT BES MOTORS, HINGES, LOCKS, CLEANING AND OILING GUNS, TOOLS, CLOCKS, WATER-PROOFING, ETC. LUBRICATES-CLEANS*PREVENTS RUST CONTENTS—Centinued from page 8 Auto Becomes Power Mower - = = = = 59 Brothers Build Plane Powered By Hybrid Engine - - - - - = = = = = © 60 Compact Velometer Devised 60 Pie Pans Make Drying Reel 60 Axle Eliminates Strains - - - = = = = 67 Sign Spells Its Message - - - = = = = 67 Huge Bucket Scoops 12-Ton Load In Single Bib o mox cow oc ox x «ow x qd Tire Changer Aids Air Line - - = = a 78 Truck Refrigerator Devised - =- = = = - 85 Bicycle Trailer Has Radio - = =- = = = 87 Fist Aids Berry Pickers =- - = - = - - 88 FOR THE WORKSHOP FAN Handikinks For The Workshop - - - - 93 Time Saving Kinks For Housewives - - - 103 Novel Potentiometer Made From Lead Pencil 109 Buzzer Tests Motor Windings - - = = -]109 DEPARTMENTS Solving The Readers’ Problems - - = = 18 Random Chips From The Editor's Workbench 24 Nie Sprank's Science Oddities - - = = = 30 Workshop Hobbies - - - -- = = - 89 Radio Sparks And Electrical Experiments - 109 Amateur Photo Puzzlers =- =- - =- - = - 166 Expanding Business Greets New Ideas - - 170 MISCELLANEOUS England Equips Navy With "Torpedo Plane Fleet - - - - - - = = = = = = 34 Youth Wins Model Trophy - - - - - - 46 Upside-Down Boat Serves As Roadside Cafe 57 New Hood Protects Operator = =- = = - 59 Soviet Divers Raise Ship - = - = - = 85 Diesel Locomotive Used In Underground Tube - -----.--.--.-- 8 Wheel Weighs 500 Tons - - = = = =- = 87 Floating Post Office For Ships= - e =- e 88 12 Accept No Substitutes?’ Always Insist on the Advertised Brandt

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Electricitu Aw, at your finger ends yz AUDELS NEW ELECTRIC LIBRARY—A progressive Home Study and Reference Course in applied electricity. Easy to understand. Ques- tions and answers plainly written for a complete working knowledge of moder electr lea ractlce, necessary to every electriclan, engineer, mechanic and student. LEARN THE AUDEL WAY! You ask the questlon—Audels New Elec- fric Library gives the answer—9500 simplified outlines, graphic illus- trations and precise explanations covering Construction, Operation and Machine Maintenance. BOOK A MONTH PLAN—Order the volume that interests you—todayl We will send that volume on 7 days’ free trial. If the book helps you, send us $1.50. If it does not help you, mail book back to us. On receipt of your frst payment, we wlll send your second book. We allow 30 days to pay for this and for each followlng book until yeu complete the Serles. " f you are not satisfied, you may cancel your subscription at any time. "Theo. Audel & Co., 49 W. 23rd St., New York City EXAMINATION i ^ Electric Library on 7 days’ free trial. If OP wilt remit 81.20: otherwise I wili return it. I also request you to mail one book each month on (ONNIE same terms, No obligation unless I am satisfied. Name ...saecosoccoveseeeneoveseseoveecacossovescsoosececene Address .. Occupatlon .. SCIENTIFIC CRIME DETECTION that pays BIG REWARDS The nation’s cry is for SCIEN- TIFICALLY trained Investiga- tors. ‘This new training not difficult, Advanced education or previous ex- perience not necessary. Study at home during spare time, Easy terms policy. Course includes Finger Prints, Handwrite ing, Photography, Invest gation and Defense and Attack, Big regulation outfit freetostudents. Ine Structors nationally known experts in Scientific Crime Detec- lion. Get into SCIENTIFIC Crime Detection and prepare for BIG. EARN- INGS, Send for į thrilling book containing full particulars. It's NEW-EASY particulars. Tp TRAI NING— young man 17 " ` Endorsed by or over, ; EXPERTS | E ER EA ES EX GE ED ES DS ER EQ HZ A EZ N N ES GIG BOT (R$ RN ES RD EDD m EG MD ED aa SCIENTIFIC CRIME DETECTION Dept. 10E7 INSTITUTE OF AMERICA, INC. J. T. Burdette, Pres. Chesapeake & Ohio Bldg., Huntington, West Virginia Gentlemen: Without obligation, send big book ineluding 14 famous. cases, telling how I can get into Scientific Crime Li . | ; adalat ro ds de B _ Fawcett Building HOW TO BUILD TRAILERS THE BOOK THOUSANDS HAVE BEEN WAITING FOR 128 PAGES 500 PICTURES COMPLETE PLANS Fon BUILDING— Six Cabin Trailers Two Folding House Trailers Trailer Radio and Light Plant Delivery and Boat Trailers Trailer Interior Fittings and hundreds of trailer and auto shortcuts,. kinks and camping tips Get your copy now at your C favorite newsstand or order direct from: MODERN MECHANIX PUB. CO. Greenwich, Conn. | 14 ‘Accept No Substitutes! Always Insist on the Advertised Brand!

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To qualify for a good Diesel job you must receive training in an Institution that can offer you practical Instruction. At National Schools you actually work on the latest equipment, including practically every approved make of Diesel engine. You get the kind of instruction that serves your every day needs in the Diesel field after you have graduated. It's the type of training you can "cash in" on. You are trained under the direct, personal supervision of licensed Diesel Engineers. You learn Diesel and gas engine operation, repair, trouble-shooting, theory. A S ENGI AW N / mne Ni La ne NL Nu r j Mie ne LN 7 EASY-TO-LEARN MASTER TRAINING National Schools’ training is complete in every respect. It includes all phases of Diesel engines, fuel injection, gaso- line, butane, propane and natural gas engines, also Auto- Diesel electrics, machine shop practice, batteries and other essentials chat must be learned in order co give you well rounded-out training. LEARN IN LOS ANGELES The most delightful place to learn—Los Angeles—the playground of America. Fascinating surroundings. Your coach railroad fare will be allowed co Los Angeles from any point in the United States. EARN ROOM AND BOARD Wo help students obtain part-time jobs to carn room and board while learning. This service only jor residents of U. S. NATIONAL SCHOOLS Special Added Feature DIESEL ELECTRIC POWER GENERATION A new feature essential to the com- plete training of Diesel experts. Completely covers power genera- tion. This extra course is now pre- sented to all Diesel students withe Out extra tuition, COUPON | for - Address Diesel Generating Unit. Diesel Converted Ford Auto eee ee ume NATIONAL SCHOOLS, Dept. 5-MMA 4000 So. Figueroa St., Los Angeles Send Free Dicsel Book of Details. Name marora pes atisomeded Age Student servicing Diesel Electric Unit. Partial Room, Diesel Engine Dept, TE .-----

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A dual purpose radio that does an equally good job at receiving, whether you have it in a BOAT—CAR— YOUR OWN HOME! When the “gypsy in you" wins out, put it. “1 in your Traller, Auto, or Boat. It operates on 110 mplete volts A.C, or on a 6 Volt Storage Battery WITH- 29 OUT ANY CHANGES OF ANY KIND. Covers! fboth Short Wave and Broadcast Bands, SEND FOR FREE NEW SPRING CATALOG WHICH FULLY DESCRIBES THIS AMAZING LAFAYETTE RADIO RECEIVER WHOLESALE RADIO SERVICE (0.x NEW YORK, N. Y- CHICAGO, ILL. ATLANTA, GA. | 100. SIXTH AVENUE--901 WT JACKSON BLVD 430 W. PEACHTREE ST. N. W.. BRONX, N-Y.-- "NEWARK, N. J. JAMAICA, Lo ]- 542 E FORDHAM RD. © 219 CENTRAL AVE. © 90-08 - 166th STREET IMERRICK ROAD), WHOLESALE RADIO SERVICE C2., Inc. 1100 SIXTH AVENUE .NEW YORK, N Y. [Rush FREE Spring Catalog No. 68-2E7 ` Enclosed find money order C] for Model BD- 32. W Send FREE parts list for Television Kit [-] I Rame... LIN BAddress.... AMATEUR CARTOONISTS WIN $2500, Wanted—Amateurs with humorous ideas. No drawing ability necessary. The amateurs of today are the professional cartoonists of tomorrow. Ideas Judged and prizes awarded by Applause-O- Meter test before movie audlences. Everyone has au equal chance, h 26 cash prizes in all. Rush name on penny post card for ‘Valuable Tips on How to Make Money With Simple Cartoons and Humorous Ideas’’, Cash Prize Entry Blank and Rules—SEND NO MONEY. CARTOONISTS' EXCHANGE S Dept. 355-A Pleasant Hill, Ohlo A GAS MOTOR KITS Never in the history of gas Sngines "as a motor ever offered at so low a price. The G. H. Q. Motor is actually one of the most werful motors ever constructed! Has broken records for amaze ng performance—flies model planes up to 10 ft. wing spread. Also used for boats. And look at all these extra features! Easy starting—just a twist of the wrist, Steady running—runs 27 minutes on ounce of gas. Precision, replaceable parts. Cylinder and piston lapped. Longest crank shaft ever made on miniature motor. Chrome nickel steel shaft with 114” bearing surface, Connecting rod of high speed bronze. Kit includes plug, coil, condenser, tank, igni- tlon wire, cylinder, piston, connecting rod, timer, crankshaft, all screws, nuts, bolts, etc. Every part js fully machined and fin- ished, No oll, gas, batteries, or propeller included. ostpaid for only [i Ready-to-run G. H. Q. Motor complete with free, ga, finished mounted fly wheel, E:X5 entirely assembled on stand. Lg horse power at E 3000 to 7000 R. P. M. - Tested and run before shipment. Only $12.50. Or send gc for Illustrated catalogue. G. H. Q. MODEL AIRPLANE CO. 854-A E. 149 St. New York, N. Y. DEVELOP £ PRINT ‘SY2 SNAPSHOTS Save One Half / Save money and have fun developing, print« eapstience nodded. Evaryinits fnPludna is le Ini include Central’s professional Dark Room Outfit. A3265 Valu Send as only $1.95 money order forthe ony T AE pon t(pic- tured here) including electric Toby lamp, developin end Sx; ing trays, chemicals, photograph paper, com- plete directions — everything needed. Or sent. .C. O. D. $1.95 plus postage. Unless perfectly satisfied, return outfit within 10 daya and your money will be refunded! Order today — start print- ing your pictures right away! WRITE for Free Bargain Book of Cameras and Supplies. CENTRAL Camera Co. (Est. 1899) 2308. Wabash, Dept, J-5, Chicago N e S | | | en ) | 0 WEEK Big cash profits for you; fult or spara time. Over 250 household necessities- things people must buy. Proven fast sele lers; steady repeaters, earnings very first ay. TUDOR SEDAN GIVEN YOU AS BONUS. I'll show you how to start at Once; send dou eve: thing Dig Display Oute fit and quick cash plans. Detalls FREE—no obligation. Just send name on postcard. ALBERT MILLS, 3945 Monmouth Ave., Cincinnati, 0. FREE ELECTRICITY From Wind Power ‘For Lights, Power, Radio, from Auto Generators. New Copyright Book with over “100 Facts about Wind Chargers. Wind-Propellers— Generators Plants— Batteries. Answers all questions you should know. Including plans for 6 or 33 V. Plant. Send 25c for plans, facts and catalog. CURRIER MrFG. CO. 407 Terminal . Minneapolis, Minn, ARNADT Pioneer Poultry Batteries | Reduce Cosls—Speed Production. Complete line of Battery Equip- ment for Chicks, Broilers, Pul- lets and Layers. Thousands are making money the ARNDT way. FREE Booklet tellg.the whole story. Write for it, " BUILD a camping trailer, boat, ra- dio, games, toys, or furniture from MM blueprints. Select your plan ner from this FREE illustrated cata- og. è á § MODERN MECHANIX PUBLISHING CO. : i Fawcett Bldg., Greenwich, Conn. ^ U Please rush my free copy of the 1937 MM Blueprint f 1 catalog. I am enclosing a 3-cent stamp for postage. 1 [| I u Name I : ! L] i E me I 1 [| a ' gp City and State sess 3 i) 4 16 Accept Na Substitutes! | Akvays Insist on the Advertised Brand!

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To help you answer these 3 questions: What are today's E : 1 1 € opportunities in Drafting? Will I like the ™ work? | Beginning Lessons in Before anything can be made or built, the Drafts- man first must draw it. Building trades, transportation, manufacturing — ALL depend on him. That is why any pickup in any line means first call for the Draftsman! Fit Yourself for a Job with a Future Drafting welcomes ambitious men — offers good pay to start, with splendid opportunities for promotion, One of the steadiest of alllines. Right from the start, the beginner works side by side with experienced men—inking in their drawings, making tracings, constantly profiting by his contact with seasoned engineers. The “higher ups” see his work. If it is good, advancement is sure and steady. Pleasant, well-lighted offices are the Draftsman’s work- room. He keeps regular hours, with congenial, high grade fellow workers, The work is fascinating—embraces not just one line, but hundreds, E Drafting Experience NOT Necessary You can master Drafting readily by home study because you learn and advance ezacily as professional Draftsmen work—with T-square, dividers and drawing board. Actual working conditions are duplicated to the final detail. Thou- sands of successful graduates enthusiastically endorse Amer- ican School methods, nowhere better exemplified than in our Drafting course. @ We want you to see for yourself—before you come to ANY decision—exactly what Drafting is like. We want you to judge your own interest in the work—and our ability to teach you. So we make this 2 Free Lesson Offer. American School, Drexel Ave. at 58th St., Chicago, Ill. “Drafting FI . Drafting Opportunities Growing Daily Prove That You Can Qualify The 2 lessons will be sent absolutely with- out obligation. the privacy of your own room, look them over. See how simply you start —how gradually you areled step by step—how thoroughly you master each point—how, as time goes on, you can pass from a raw beginning to complete mastery of Drafting—able to get and holda pleasant, profitable,steadyjob.Such a future is well worth looking into RIGHT NOW, 50... just mail the coupon! ei eee A d Instruments s | : Materials © Principles orar: Worki poe Pat, Mail Coupon for Pea ae i American School, Dept. DD-528, Drexel Ave. at 58th St., Chicago E Without theslightest obligation, send 2 beginning Draft- p {2g Lessons and free Bulletin. I am not to return them, When Answering Advertisements Please Mention May Modern Mechanix Can I learn Draft- | "ing readily? te Drawing 7] 2 Lessons FREE

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v4 PROBLEMS C ANSWERS TO READERS’ PERPLEXING PROBLEMS Editors Note: | not require special research or involve trade secrets. scribed in this issue can also be obtained free upon request. reply, Address: Your questions will be answered personally and free of charac by MM experts provided they do Names and addresses of manufacturers of new products de- Enclose a self-addressed and stamped envelope for Problems Editor, Modern Mechanix Publishing Co., 1501 Broadway, New York City. HOW HORSEPOWER OF ENGINES IS COMPUTED Automobiles, steam engines and electric motors are all rated at some given horse power, yet I never have been able to understand just what method engineers use to de- termine the various ratings. Is a standard measurement employed on all devices or is a different system used for each type?—Walter Danna, Denver, Colo. A standard rule of physics is used to determine the horse power rating of all mechanical equipment capable of de- livering some form of power. The rule is based on the effort required to lift a 150 pound weight, 220 feet in one minute. If the effort were sufficient to raise the 150 pound weight 220 feet in one-half minute the horse power rating would be doubled or two horse power. METHODS USED TO RECORD SOUND IN MOVIES Is there more than one method used by motion picture studios in recording talking picture sound and if so how is it accomplished? Being an ardent motion picture fan I have often wondered just what principle was used, but have never succeeded in finding out—Ray Donnovan, Boston, Mass. There are three methods used in recording motion picture sound and each known by their trade name. Two methods employ what is known as sound-on-film while the third method is the recording of the sound on large wax discs similar to the transcriptions used by radio broadcasting stations. In the sound-on-film process a track is provided along the edge of the film for printing a graphie sound wave produced by a photo electric cell. The photo cell converts actual sound into a fluctuating ray of light which is converted back to sound by another photo electric device attached to the theater projector. There are two of these photo electric cell methods in use, but both operate on the same general principle. MAKING BLUEPRINT PAPER FOR HOME SHOP USE Can you teli me how blueprint paper is made? Ihave a number of workshop plans which I would like to distribute to my friends, but do not wish to give away or loan my original copies. If I could make blueprints of the plans by some simple method your advice would be most appreciated. -—E. Doulval Reem, Philadelphia, Penna. To make blueprint paper first choose a good grade rag content paper and on it sponge the following solutions, each being stored in different containers and mixed as used: In container "A" mix 10 drachms of Potassium Ferricyanide 18 in 4 oz. distilled water. In container "B" mix 15 drachms Tron Ammonia Citrate in 4 oz. distilled water. Mix an equal amount of each solution into a container and apply to paper in a darkened room, allowing the paper to dry in à closet where no light will strike it. To produce the blueprint, trace the plans in India ink on waterproof tissue and place tissue over the sensitive side of the paper. Lay a sheet of glass over the two and expose to bright sunlight for five minutes. Develop by washing treated paper in water. If prints are dull, expose longer; if very dark use a shorter exposure. ELIMINATING RADIO INTERFERENCE NOISES Our home is located in the vicinity of a beauty shop and hoises produced by electrical equipment which they use is picked up by our radio receiver. Naturally this is very an- noying and if at all possible I would like to know some method by which noise-free radio reception could be obtained. Any suggestions which you might care to make would be most welcome.—Carl Denton, Covington, Kentucky. Electrical interference in radio receivers is the result of radio frequency impulses setup by motors, vibrators and similar apparatus operating in the vicinity of the receiver or carried over the electric power lines to it. In order to eliminate this very annoying effect some form of wave trap device must be inserted in either the antenna or power line or both if the interference is unusually bad. Many of these "traps" consist of tuned coils adjusted outside the fre- quency of the interference so that their passage into the radio receiver through the antenna or power line is impos- sible. Any radio dealer or mail order parts house can supply the necessary equipment for making this installation. The cost is nominal. HOW TO START A STAMP COLLECTION Iam a boy 12 years old and would like to start a stamp collection, Where can I get foreign stamps and just how should I prepare a stamp album?—Russell Walker, Daven- port, Iowa. Starting a stamp collection is not at all difficult nor is it expensive. First purchase a package of foreign mixed stamps. Usually these stamps cost only a few cents for a package of one thousand. While many of them are duplicates you can trade them with your friends for others which you do not have. An album for beginners can be purchased at many 10-cent stores and new stamps can be obtained from any of the stamp dealers whose advertisements appear in this magazine. ` [Continued on page 20]

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New 6-Volt . TRINDL Electric ARC WELDER PATENTS PENDING Ls RETAILS , Works Storage Battery [on or110 Volt Light Circuit A REAL WELDER Men, here is the hottest specialty item that has come along in years. A real honest to goodness electric arc welder that does a man size job. Built sturdily of the finest materials, "Requires no mechanical knowl- edge—any one can use it. Every demon- .Stration should make a sale, This new Trindl Electric Arc Welder is made possible by the invention of a low voltage carbon which gets white hot from the current of an ordinary 6 volt storage battery such as in your automobile. It only uses about 20 to 25 amperes of current which is about the satne current drain as 4 headlight bulbs, yet develops about 7000 degrees of heat. MELTS IRON AND STEEL INSTANTLY The Trindl Welder is simple to use, Expert welding can be done by anyone. he Trind! Arc Welder is the only battery welder that, after a rigid test, has been approved by the Automotive Test Laboratories of America. It is ideal for making permanent fender repairs—also for broken castings, radiators, cylinders, water jackets, holes in auto bodies, hog troughs, boilers, tanks, milk cans, radios, batteries, etc. Iron, Steel, Brass, Copper and Tin can be worked on for a quick and permanent repair, The repaired part will be as strong as before. NEW 110 VOLT CONVERTER MAKES FULL SIZE PROFES- SIONAL UNIT This new converter pictured above is used on any 110 volt 60 cycle electric light socket in place of a storage battery. It is especially designed to be used with the $3.75 Trindl Electric Arc Welder—COSTS LESS THAN A GOOD BATTERY—The combination makes a full size professional elec- tric arc welder that everybody can use. Ideal for fender and repair shop needs. This is a sensation, not only in price but also in actual results. The converter represents the same fine construction and engineering skill $10.50 a day profit for you for only as the arc welder, The complete outfit, including the transformer, is easily Selling 6 Trindl Arc Welders. No portable so that it can be brought right to the job. matter where you turn, you will find f people who will Want to buy arç (scd welders from you. arages, shop USERS SWEAR BY IT— The Price is 5o Tow thit now men, radio repair men, farmers, home- real welding outfit. Think of the profit you can make introducing this one di Tiina! laden o uu Trindl Welde.sand Converter-—a simple five minute demonstration should ers. Be the man in your territory to make a sale tọ every interested prospect, especially when they hear the clean up with "PrndL" y ama pec low price." Garages, radio and battery men, nd sheet a metal workers, janitors, farmers and home-owners all need the Trindi Welder and Converter. a MAI L CO U P Oo N N OW ! TRINDL PRODUCTS ] A Cc T N Oo Ww Y There are big profits and afsteady business 20 HR Calumet Ave, ione d rial " waiting for you, taking care of your terri- = ae er sb aie " oty tor us. on't let someone e| i — es! ush me free particulars of how T can make "Today. e else get in before you—Send coupon big money with Trlnd] Electric Are Welders and Converters. This does not obligato me in any way. FACTS Here are just a few from the many letitia praise we haverecelved from d rindi Electric Arc boosters, Please find enclosed for 12 welders by return mail for I am Pu sett out now, They are se, ing ne, — derson, Nebr. Mars dins "Received my Trind! A, bur dec and am, both pleased urpr 7? — i Glier, Ohio. - EM "Results are ve ifyi with your welder. arie closing an order for 12 more Electric Arc Welders,” —Nel. son O. Lyster, Fla, ee my welder, and it regular repair shop in jt. ae R. Harper, in " ‘I sold 4 of your Trindl e ES Arc Wel ers ia ros QUEM —C. Gillies, Can. “I sold 9 welders in m ten calls."——F, W, Stice Tat hri cane ceedie se eesiceaae sesetereetomsehet en TRINDL PRODUCTS |- —— D 2229-HR Calumet Ave., Chicago, lll. When Answering Advertisements Please Mention May Modern Mechanix 19

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GREASELESS POTATO CHIPS Here's your opportunity to get in busi- ness for yourself. Turn potatoes into cash by making potato chips. I'll show you how with my improved outfit. Makes delicious, crispy, tasty, superior “‘greascless’’ chips at a surprisingly low cost. Also Doughnuts and Salted Nuts, Very little cash needed. No previous experience required if you follow the instructions and selling plans I furnish. Begin in any location, village, city or suburb. An opportunity is waiting. Steady year 'round business. Groceries, delleatessens, restaurants, taverns do the retailing for you. Merely keep them supplied. WE HELP START YOU IN BUSINESS Raw material plentiful and low priced. Sime Dlified process and confidential plans. Profit large—unusually so. Enormous quantities Gonntete, AG-unlt of Potato Chips are bought daily. E type. white vitreous enamel ROUND Cookin Vat; Direct-to-fa' high speed slicer; centrifugal Grease Extractor; Ther» WE HAVE A CREDIT PLAN Find out how you ean buy equipment on a monthly payment plan. Let us tell you what others say about the Potato Chip busi- mess. Get all the facts. Get into this mometer P asi- dignified, year ‘round business with int necessary to atari money-making opportunity. Send for FREE —all at new low booklet entitled, “How to Start a Factory", price. Do this AT ONCE. LONG-EAKINS COMPANY 542-5 High St., Springfield, Ohio € Earn Cash az Home! on We paid M. M. $267 in 3 weeks for exceptional ‘‘celiar crop’’ patented mush- rooms! Big free pieture book tells if your Cellar, shed, barn suitable, We buy all crops thru ten branches, Write today. (Estab. 1908.) UNITED MUSHROOM CO. 3848 Lincoln Ave., Dept. 314 Chicago EXPERIMENTERS! The latest thing out! ‘The Invisible Control.” With this new, easy to build, and inexpensive device, you will light lights, ring bells; operate the radio and other electrical appliances by merely POINTING AT THEM! There are no concealed switches or | buttons to push. Made entirely from old Radio Parts. Blue prints and all instructions $1.00. Address “THE WONDER LAB", Box 160, Grand Central Annex, N. Y. Send for CATALOG of Motor-Driven Tools : Thousands of home workshops, MX factories, builders, farms are using these new compact port- able, rugged and efficient motor- driven tools. They stand the heavy grind of continuous use—yet are astonishingly low priced. Many new features and improvements. Com- plete DELTA line includes: Circular Saws, Seroll Saws, Lathes, Jointers, Shapers, Band Saws, Grinders, Drill Presses—and full line of accessories. Send today for big 48 page FREE Catalog Dept. M537, DELTA MFG. CO, 600-634 E. Vienna Ave. Milwaukee, Wis. 20 Accept No Substitutes! Problems [Continued from page 18] EFFECTIVENESS OF CYLINDER REBORING My car has traveled 60,000 miles and much of its original power has been lost. Do you think it advisable to have the cylinders rebored? Would this result in a saving of fuel and an increase in power?—Ralph Logan, Ft. Wayne, Ind, Unless the walls of your cylinders are scored a set of new piston rings would no doubt increase your car’s power and reduce fuel consumption. In cases where broken rings have damaged the cylinder wall honing or reboring is ad- vised, The reboring operation will provide smooth cylinder walls so that the pistons will operate at maximum efficiency. WATERPROOFING DAMP WALLS . During the spring our living room walls become very damp and oftentimes small drops of water form on the surface resulting in considerable annoyance. Is there any method whereby the dampness can be eliminated without too great an expense?—Roy Page, Trenton, N. J. In order to prevent moisture from seeping through the plaster it will be necessary to apply several coats of sizing at a time when the wall is dry. Shellae is a good water- proofing compound for walls that are papered. The old paper should be scraped off and the shellac applied, allowed to dry thoroughly and new wallpaper hung. While the wall treatment suggested will keep moisture from seeping through the plaster it is advisable to check this condition at its source. The best way to do this is to surface the outside walls of ‘the house around the bottom with cement to a height of 18 inches. Apply the cement with a trowel to a thickness of 44-inch. The concrete will prevent water from seeping into the walls and eliminates objection- able moisture from collecting on the interior plastered wall surfaces, CLEANING AND POLISHING MARBLE Recently I purchased an antique table which is fitted with a marble top. It is my desire to restore this table to its original beauty, but I have been confronted with the problem of cleaning up the top so as to bring out the true marble finish. Is there any simple method whereby I can remove the grease and grime from the marble without damaging the surface?—Lester Funk, Portland, Maine. To clean marble surfaces apply a weak solution of oxalic acid with a cloth until all dirt has vanished then wash off thoroughly with water so as to remove all traces of acid. After this treatment the marble will be somewhat dull, but it can be polished to a fine luster with finely powdered chalk and a damp cloth. AUTO PRODUCES GRINDING GEAR NOISES When I drive my 1930 car over 30 miles per hour a loud grinding noise is heard. Although I replaced the original gears with a new set the noise continues. I have even tried a very thick bodied oil with no results. Can you advise as to the cause of trouble and how it might be corrected? — Ard Miller, Fleetwood, Pa, From the description given the trouble is in the differ- ential. Unless attended to at once serious damage to your car may result. The gears are in dire need of attention and are slowly grinding away. A simple check-up, for deter- mining whether or not the differential is at fault, can be made by jacking up the rear car wheels and allowing the car to run at a slow speed in high gear and listening for a faint buzzing sound. Always Insist on the Advertised Brand!

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on 17727 1077717 PRINCIPLE

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barriers to perfected combustion! The new VACU) MATIC solves the secret of greater,power! With almost magical action, this amazing. invention instantly puts new life and pep in any motor, It adds mileage to every gallon of gasoline , ae produces split-second pick-up, sensitive accelerator fesponse, quicker starting, greater speed. and smoother running. ALima o Nothing Like Iti The self-starter — four wheel brakes <= knee action — streams lining ~ ..and now VACU-MATIC! The sensational money E Guaranteed Gas Savings : . Saving invention! With it, engineers have achieved a practical means VACU-MATIC proves itself on every cary Ie f& guaranceed 9f balancing air and gasoline automatically for all speeds, to give worthwhile gas savings, quicker pick-up, and'more — VACU-MATIC is entirely different? — It operates on the supercharge power or it costs you nothing. You can instantly cell che principle Praemia dd ing a carpe ok extra em snp d. » Hh "uter air, int e heart ol e gas mixture. t t$ entrel difference in added power and motor. performance e» you AUTOMATIC ‘and allows the motor to "breathe" at the correct time, quickly notice the cash savings on gasoline, opening and closing automaticaly as required- No idling troubles» no carburetor adjusuments necessacy, Ic is so simple ic will amaze you Fits All Cars —s0 practical it will save you many dollars on gas cost

VACU-MATIC is constructed of six parts, assembled and r fused into one unit, correctly adjusted and sealed af the — — — == == -— FREE OFFER COUPON «e ~ — -4 factory. Nothing to regulate, Any motorist can attach eic án ten minutes, Once in, its only reminder THE VACU-MATIC COMPANY 7612-305 W. Sute St, Wauwatosa, Wig, is the surge of instanr power and speed Gentlemen: Please send me full particulars concerning the VACU» it gives te the motor and the savings ft affords your ebook, : your pod MATIC and demils of your Free Offer. This af course does not obligare me in any way, we NN VACU.MATIC offers a Free Details splendid opportunity for $ You owe it to yourself to know all | unusual sales aud prof abour this remarkable discovery. Mail I Name LM the coupon below, Start saving gas with VACU-MATIC and enjoy a new Address seras eem ena bees sos t ce an samma aire armana driving thrill! There's no obligation 50 get the facts now! Write today!

City, eres snos m sooo t olmayip SAIE. wea p eee m n. The VACU-MATIC Co. Wauwa we Loo D Check here if interested in selling proposition. MARVEL SOLDERING FLUX Quickly tins Rusty fron and Steel—Galvanized Metal—Corroded HAVE YOU SOME Copper—Aluminum—White Metal and Olly Surface. S PA R E R O O M 2 basement or garage where you can do light work? We ean No Acids or Cleaners needed. Offer you a profitable proposition for 1937 casting new 5 and 10e A Revolutionary Chemlcal Compound for Tinsmiths—Plumbers— Novelties, Ashtrays, Toy Automobiles, ete., as Manufacturer for Farmers—Garages—F ishermen and General Household Use. firm of many years standing. No experlence necessary and small DOWNER SALES CO, GENEROUS sUPPLY outlay starts you. If interested in devoting your spare or full lime to profitable work write AT ONCI as we are now closing 3421 No. Newhall Str. 65c Milwaukee, Wis. POST PAID

arrangements for supply of our goods. METAL CAST PRODUCTS CO. Dept. 2, 1696 Boston Road, New York, Ne Y. AUFOND GIANTS WEICH EASY TO START! UP 10 3 LBS. EACH MARKETS WAITING. Frog legs in big demand at good prices the year F RE E round, Millions used yearly! K WE BUY We have one of the largest BO 0 M»

5 frog markets in the world! Easy to ship. Sell to us in addition to other markets.

MEN AND WOMEN starting in every state and "tuyo Canada. See what others already doing. Small no pond starts you. FREE FROG BOOK explains our unusual offer to beginners! Now's the time to begin! Write today! AMERICAN FROG CANNING CO. , Dept. 119-E New Orleans, La. When Answering Advertisements Please Mention May Modern Mechanix 21

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ARE YOU JUST HOPING TO LAND IN A GOOD JOB? Hore without foundation is pretty futile in this competitive age! But hope 2lus training is a win- ning combination—and all over this country today, in all kinds of professions and trades, men are getting ahead—landing in good jobs—earning more money—because of serious and systematic study of International Correspondence Schools’ courses. These courses are giving them the training they need to succeed! As for you, investigation will not put you under any obligation. Mail the coupon! INTERNATIONAL ‘CORRESPONDENCE SCHOOLS Box 2325-L, Scranton, Penna. Without obligation, please send full particulars about the subject before which I hare marked X: TECHNICAL AND D Architect O Architectural Drafteman D Building Estimating D Contractor and Builder Li Structural Draftsman C Structural Engineer D Electrical Engineer O Electric Lighting LI Welding, Electric and Gas O Reading Shop Blueprinta LI Telegraph Engineer O Telephone Work O Mechanical Engineer DO Mechanical Draftsman O Machinist Li Patternmaker O Foundry Practice LI Bheet Metal Worker D Boilermaker INDUSTRIAL COURSES O Diesel Engines O Aviation Eng. O Auto Mechanic O Plumbing D Heating D Air Conditioning O Refrigeration O Steam Engineer O Steam Eleotric Engineer O Marine Engineer O Civil Engineer D Highway Engineer O Bridge Engineer ; O Bridge and Building Foreman D Surveying and Mapping O Radio [] R. R. Locomotives O Air Brakes L] R. R. Section Foreman OR. R. Signalmen O Toolmaker O Chemistry © Pharmacy O Coal Mining O Navigation D Cotton Manufacturing DO Woolen Manufacturing O Heat Treatment of Metals O Agriculture O Fruit Growing O Management of Inventions O Poultry Farming BUSINESS TRAINING COURSES O Business Management O Lettering Show Cards O Industrial Management D Stenography and Typing O Traffic Management D Civil Service O Mail Carrier D C.P. Accountaney O Railway Mail Clerk DL] Bookkeeping O Grade School Subjecta D Secretarial Work D Iligh School Subjects D Cost Accountant D College Preparatory OU Salesmanship £j Advertising QO Tirat Year College Subjecta O Service Station Seleamanship O Illustrating O Spanis!, [1 Business Correspondence O Cartooning L] French O Signs DOMESTIC SCIENCE COURSES O Professional Dressmaking and Designing O Home Dressmaking O Advanced Dressmaking O Millinery O Foods and Cookery O Tea Room and Cafeteria Management, Catering Present Position df you reside in Canada, send this coupon to the International Correspondence Schools Canadian, Limited, Montreal, Canada 22 Accept No Substitutes! AVIATION és Calling LINCOLN ^radvafes. to Thrilling Careers at GOOD PAY! You can be ready for YOUR big job in Aviation with just a few short months of Lincoln Train- ing. Lincoln Trained men are preferred. Avia- tion gave fine positions to 50 recent Lincoln Graduates —and has a position for YOU as soon as you are properly qualified. Lincoln Government Approved Training prepares you for aviation's better pay jobs. Training for Government License as Pllot, including Transport. Every requirement for Government License as Airplane and Engine Mechanic. Sheet Metal Tralning. Write for full information. LINCOLN AIRPLANE & FLYING SCHOOL 401G Alrcraft Bld Lincoln, Nebr. FOLLOW THIS MAN Secret Service Operator No. 98 is on the it unning down dangerous Counterfeit Gang. Tell- Operator No. 38 3| tale finger prints in murdered girl'a room. r e e The Confidential Report Onerator No. $8 made to his chief. Write for tt. Earn a Regular Monthly Salary YOU can become a Finger Print Exe in your spare time, at small coat. rite mee fidential full report and details. Literature will NOT Re sent to oye under 17 years of age. E OF APPLIED SC 1920 Sunnyside Aye ENOR Dept. 2358 Chleago, Ill, MEN, WOMEN EARN $25 OR MORE WEEKLY at home. We supply ma- terials, buy your crops, and show you howto grow mushrooms in your cellar, shed, attic, barn. Check weekly. Illustrated Book Free. Write NOWI WASHINGTON MUSHROOM IND. Dept. 103, 2019 2nd Ave., Seattle, Wash. BE SUCCESSFUL Read Invention & Finance—it’s your chance to make money. Year subscription 60¢ entered upon promise to puy on receipt of first copy. Place your order by cutting out and mailing this advertisement. INVENTION & FINANCE MAGAZINE 80-H WALL ST., NEW YORK, N. Y. the future's greatest source of illumination. Splendid future for men in each locality who start now while it is still new. FREE Send your name for free booklet describing NEON'S opportunities: complete data on practical home study course, letters from students. Very low cost! WRITE TODAY! COMMERCIALITE LABORATORIES, BOX 47-M, OMAHA, NEBR. 1000 BARGAINS AGENTS UNDERSELL STORES Clothing, Dry Goods, Shoes, Notions, School Supplies, Nove elties, Punch Boards, Razor Blades, Drug: Sundries, Cose metics, Perfumes, Food Products, Soaps, Carded Goods, Specialties, etc. Big Illustrated Catalog FREE. RELIABLE JOBBERS Dept. 513, 930 W. Roosevelt Rd. Chicago e AMAZING MYSTER Prepare ‘yourself quickly for today's biggest opportunity— NEON or “gaseous tube" lighting—most widely used medium of lighted displays. | MYSTERY MINERAL _ Reconditions Motors Like Magic/ ] Easily Installed In few moments! Iner lon. Cuts gas and oil costs, Saves rebore job and new tingal RESULTS GUARAN- Basins. Sen ‘eo Po) oe SY fiona, car owners, DEMONSTRATOR eee" MODA tor PREE DEMONSTRATING [icy Ve] 4b 30 NT SAMPLE and '*No Riek” money-making plan MOTO-NU CORP., 216 W. 55 SL, Dept. G-2, New York Fi ' dealers. Always Insist on the Advertised Brand!

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The at. x E : Is Your Job Safe? Eo ie se 0 | n e [7 g Just as the gasoline engine ; : changed or wiped out the Jobs of thousands who depended on horse-drawn vehicles for theirliving—justas electricity changed the entire set-up in the fields of light and power— so now the Diesel engine is fast invading both the power and transportation fields, and threatening the present jobs of thousands of workers. If jobs in your line are stead- ily growing scarcer, you owe it to yourself to investigate this new, progressive, uncrowded line, that in our opinion will offer good openings for the next 25 years. : —The New, Fast-Growing Power Diesel engines — because of their high efficiency, de- You get complete information on all the latest Diesel develop nn : : ments—two- and four-stroke cycles; low- and high-speed and pendability, and economy of operation—are fast replacing heavy duty trpes: Diesel-electric generating systems, etc.—iu steam and gasoline enginesin power plants, motor trucks and our course. Includes all text materlal—with special diagrams for busses, locomotives and ships, aircraft, dredges, drills, pumps, etc. quick understanding of this new power. —opening up an increasing number of well-paid jobs for Diesel- wrlped men, The feld of Diss Epgimeeripg a op ho uperade azd Get 2 Lessons FREE to Prove continually expanding. Itwill provide " Y eS ment and good pay for those properly trained In this new industry. —— Your Own Possibilities in Diesel What This New Field Offers You Can youlearn Diesel? We want to give the opportu-' . d n d 4 nity of finding out. So, withoutcostorobligationonyour part, Now is your chance to getinto a big new industry and We will send Nod 2 beginning lessons. In the quiet of your own grow up with it to an important position, Today there is prac- home, look them over. Seo how clearly all is explalned—how tically no competition in the Diesel field, but the Increasing use thoroughly you grasp every point—how definitely you progress of Diesel engines will result in keen competition for jobs in the step by Step o that your knowledge of Dlesel grows constantly. near future. By starting your training now, you can kcep ahead Making this simple trial may be the turning point In your life— of such competition. Bo write to us TODAY! American School, Dept. D-528, Drexel at 58th Street, Chicago, Ilinois i Turn Your Spare Time into Dollars | u ny Over 50 Ways to MaKe Money | IDEAL 24 in. Model PLANS WE SHOW YOU HOW 01 your copy of the of the Clipper Ship original ‘‘LeJay Man- ual". New enlarged 1937 ediilon just off the press. C U T T Y Proved and tesled by thousands—it has no equal in the field of electriclty. Anyone can understand our S simplified illustrated plans, Learn how easy it is to A R K convert auto gencrators into 6-12-32 or I10 volt useful = y molors or generators to be driven by wind, water or A beautiful, perfect Model of gasoline. No speclal tools, no experience needed. Contnins plans this famous, fast saillng Ves- for complete wind-plants—all voltages; generator are welder; trans- Sel. BAL Construction Kit former are-welder; spot welder; bench grinder; drill press; electric Wood D A "i lr irampen outboard motor; 6 volt washing machine motor; wind propeller blades: Anchors, Bits, Chocks, Steering Wheel (all Cast Metal), Chains, also other motor and generator changes. Masts, and Spars, Sal! Cloth, Rigging, Cement, Colored Lac- quer, including Full Size Plans. $1.00 bill plus, Ge postage brings your E ——— Copy. Satisfaction guaranteed or moni ] Complete Kit, Plus 15e t Bi Mone lo refunded. von Susrentsse, SE money, New Low Prices Ack Your Dealer $ g Postage = g 3 M 9/32 in. 10e doz. Send for Catalog Model Ships, Model Alrplanes, Parts, Supplies. 5c. IDEAL AEROPLANE & SUPPLY COMPANY, Inc. 19 West 18th St., New York, N. Y. LEJAY MFG. CO. 1314 W.Lake, Minneapolis, Minn. Vs in. 12e doz, Pat. Pend. 8/16 in. 15edoz. Cast Metal Ya in. 18cdoz. DEAD EYES Postpaid. D Flectricityg Make Money In Your Workshop — Free Blueprint Booklet More than 120 plans are listed in the new MM Blueprint Booklet for building your own radio, boats, model railway, electric refrigerator, model planes and scores of other projects. Send stamped-addressed envelope for free copy. MODERN MECHANIX PUBLISHING CO., GREENWICH, CONNECTICUT “NEW BOOK CRAFTSMEN SHOULD HAVE | PELOS S AAE] Make Beautiful Furniture at a fraction of store cost. {4 pages of lumber and prices on all woods cut in usable sizes without 10c waste. USE THE CRAFTSMAN new process of inlaylng, using our new process ART INLAY GLUE, Rebated needing no clamps for the finest work. Hard to find rare grains for all wood, including foreign—hard- on first to-find cabinet hardware, Lists and illustrates 76 blueprints of scroll patterns, inlay table tops—Kits for inlaid art b . plaques, trays, book ends, cte., that anyone can make—22 pages in color. order. VENETIAN BLINDS for one-third of usual price. AI material requiring only a saw, screw driver, a tack hammer and paint to assemble, Send only one thin dime today for big book. CRAFTSMAN WOOD SERVICE CO, . 2718 MARY ST, CHICAGO When Auswering Advertisements Please Mention May Modern Mechanix 23

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Sailing, sailing—and Raymond Smedberg, of Centredale, R. I., does plenty in the Olympic V-bottom boat he built from MM plans. views show boat’s beautiful lines and excellent UDGING from the increased number of letters and photos received by the Workbench, it is apparent that many home craftsmen are entering a period of renewed activity. Perhaps the ap- proach of Spring has something to do with it, inspiring workshop fans to hastily complete projects started during the cold winter months so that they will be ready to enjoy every possible minute on the open road, lakes, woodlands, and seashore. Without a doubt, the boats, midget autos, trailers, and other interesting outdoor projects, of which we have seen photos, are going to pro- vide some mighty enjoyable days for many readers who have been poring over MM plans and working with lathe, power saws, and the lowly hammer and nails. To readers who have completed projects we extend congratulations. To those who have not we again say that it is never too late to start. No matter what season of the year you will find interesting articles and plans in every issue of MM, or in any of the books—"How To Build Trailers,” "How To Build 20 Boats,” or “How To Build It,” which can be secured direct from the MM office in Greenwich, Conn., at the popular price of only 50c each. š Rak Heading the list of Workbench prize winners this month, Raymond B. Smedberg sent in photos and a letter that were awarded first prize of $5. He writes: Centredale, R. I. Dear Editor: Enclosed are photos of my Olympic monotype V- bottom catboat that I built from MM boat plans during 24 Close-up and sailing construction details. my spare time. The sails, too, are made according to MM plans. The boat has proved very satisfactory on salt water as well as fresh water and an old sailor who tried it out stated that it was the best small boat he ever sailed. 1t is very seaworthy and handles well in light or strong winds. Building your own boat is easy and economical when MM boat plans are used. Thanks to MM for putting out really easy-to-understand plans. Raymond B. Smedberg. The combination of good boat plans and Smedberg's craftsmanship has certainly resulted in a sailboat of beautiful lines and seaworthy charac- teristics as the photos plainly show. RPR The height of the trailer season will soon be upon us and W. Thrasher, of Hamilton, Ontario, Canada, has made ready for it by constructing a streamlined trailer. In his letter which ‘was awarded a $3 prize, he says: Dear Editor: I am instructor in carpentry, joinery and building at Hamilton Technical Institute and would like to re- ceive an MM blueprint catalogue, My students are particularly interested in trailers, planes, and boat building. I am sending a photo of a trailer built in spare time, The top folds down at the rear end to give a streamlined effect when traveling. W. Thrasher, The booklet has been mailed to Mr. Thrasher and we know his students will find projects that will provide ample outlet for their energies and craftsmanship. ah de A prize of $3 was awarded to Orville W. Odle, of Hartford City, Ind., whose letter states: k Featuring a reat top that can be lowered to create a stream- lined appearance when traveling, this roomy trailer was built by W. Thrasher, a teacher in Hamilton, (Ont.) Canada. Modern Mechanix

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Dear Editor: Enclosed is a photo of a pedal locomotive made from plans that appeared in MM. It was made in a basement with common tools and has bronze bearings. Heavy enough for a %4-horsepower engine, the loco- motive stands 46 inches high and is 94 inches overall length. The locomotive is very realistic in appearance and you can imagine how my five-year-old son's eyes "popped" when he first saw it. The American Legion asked for permission to take the model to their state convention, Orville W. Odle. Yes, we can very well imagine how many little eyes would "pop" if they were fortunate enough to see a miniature locomotive that can be pedaled along the streets. Good work, Mr. Odle. "ek Midget racers still appeal to many home work- shop fans and a letter and photos describing a finely built one won a $3 award for J. R. Halley, of Philadelphia, Pa., who says: Dear Editor: Reading your magazine has been great, but when you talk midgets you want to consult Philadelphia. I am sending you a photo of what we consider a real midget. The midget racer is 64 inches long, has brakes, clutch, gearshift, etc., and is powered by an outboard engine. It will attain speeds up to 50 m.p.h. J. R. Halley. The arrangement of the outboard engine to power Halley's midget is novel, and we must con- fess that it really is one of the smallest racers we have ever seen. A real midget racer, as can be judged from the tiny tot oc- cupying the cockpit, is this one built by J. R. Halley, of Philadelphia, Pa. Note arrangement of its outboard power unit, May, 1937 Lucky ate the youngsters who have fathers who can build them a pedal locomotive like this one. Orville W. Odle, of Hart- ford City, Ind., built this realistic engine from MM plans. On behalf of the Auckland Model Airplane Club, Winston B. Mackley, of 8 Ascot Lane, Remuera, SE 2, Auckland, N. Z., wishes to invite correspondence with MM readers who are seri- ous model builders. The Auckland Club, as many readers will recall, sent a team over to the U, S. last year to win the coveted Moffett Trophy at the National Contests held in Detroit, Mich. If you are reaily interested in model plane building here is your chance to correspond with members of a club that rates ace high in the hobby. Enclose a stamped addressed return efivelope with your letter to Mackley. Another $3 prize winning letter was sent in by Robert O. Lewis, of Troy Hills, N. J., who writes: Dear Editor: I am sending a snapshot of the sail rig for canoes which I made from plans that appeared in MM. The entire cost was less than seven dollars. I used the rig to outsail two other canoes that fea- tured different types of rigs. Contrary to the general belief that a canoe is dangerous with sail, I find it unusually stable, due of course, to the lee-boards that are used when sailing. I cannot give this rig too much praise and heartily recommend it to anyone who has a canoe. There is no end of fun and thrills. Having been an MM fan for years, I keep all the [Continued on page 26]

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HE ONLY MAN | WHO COULD TALK TO THE SUPERINTENDENT “Soon after I began studying,” a student wrote to us the other day, “we had a change in management at our plant. I certainly was glad then that I had decided to study in my spare time. For, thanks to my I. C. S. Course, I was the only man in the organ- ization who could talk to the Superintendent in his own language. As a result, I was promoted over men who had been here many years longer than I." That's a true story of what just one I. C. S. student has cone. This is proved by letters from satisfied students telling oi promotions and increases in salary due directly to spare-time study. One hour a day, spent with the I, C. S. in the quiet of your own home, will help prepare you for success in the work you like best. Ves, it will? Put'it up to us to prove it. INTERNATIONAL CORRESPONDENCE SCHOOLS © Box 2316-M, Scranton, Penna. Without obligation, please send full particulars about the subject before which I have marked X: TECHNICAL AND INDUSTRIAL COURSES OG Architect O Diesel lingines G Architectural Drafteman D Aviation Eng, O Auto Mechanic E Building Estimating [] Plumbing O Heating C Contractor and Builder O Air Conditioning [O Refrigeration Ci Structural Draftsman O Steam Engincer O Structural Engineer O Steam Eleetric Engineer O Electrical Engineer O Murine Engineor O Electric Lighting D Civil Engineer O Highway Engineer O Welding, Electric and Gas O Bridge Engineer C Reading Shop Blueprints QO Bridge and Building Foreman D ‘Telegraph Engineer O Surveying and Mapping Q ‘Telephone Work D Radio OR. R. Locomotives D Air Brakes D Mechanical Engineer OR. R. Section Foreman O Mechanical Draftsman OR. R. Signalmen O Machinist O Toolmeker D Chemistry Li Patternmaker O Coal Mining D Foundry Practice O Navigation L] Sheet Metal Worker D Cotton Manufacturing O Boilermaker O Woolen Manufacturing D Heat Treatinent of Metale QO Agriculture Fruit Growing DO Management of Inventions D Poultry Farming BUSINESS TRAINING COURSES D Business Management D Lettering Show Carda O Industrial Management- O Stenography and Typing O Trafic Management O Civil Serviec O Mail Carrier L] C.P. Accountancy O Railway Mail Clerk O Bookkeeping D Grade School Subjecta C Secretarial Work O High School Subjects O Cost Accountant QO College Preparatory [3 Salesmenship C] Advertising O First Year College Subjecta D Service Station Salosinanship D Illustrating O Spanish O Business Correspondence O Cartooning O French O Pharmaoy O Sigus DOMESTIC SCIENCE COURSES O Millinery D Foods and Cookery D Tea Room and Cafeteria Management, Catering G Professional Dresamaking apnd Designing C ifome Dressmuking C Advanoed Dressmaking Name... Addre. City...... Present Position. NE EANASEEEVIS eden e EL EV aikain OPER RIS “He you reside in Canad i coupon to the International Correspondence Schools Canadian, Limited, Montreal, Canada Editor's Workbench Chips [Continued from page 25] Built from MM plans, this canoe sailing rig enabled Robert O. Lewis, of Troy Hills, N. J., to win races against canoes fitted with different rigs. Complete rig cost less than seven dollars. issues for reference. be from MM plans. My next project will undoubtedly Robert 0, Lewis. Funs and thrills aplenty await other cano? owners who build the MM sailing rig recom- mended so heartily by Lewis. HER We still receive letters from MM readers re- questing us to run articles on the construction of light planes. Much as we would like to do so, the present government restrictions on the flying of home-built aircraft would make the articles of no practical value and, for that reason, we must continue to omit them from the pages of MM. If the restrictions are ever lifted readers can depend on the fact that MM would again take the lead in running such plans. ae Fortunately, we have been able to lengthen the Workbench this month and a prize of $3 was sent to M. S. Zann, of Bay City, Mich., whose letter reads: Dear Editor: Here is a photo of my snow sled with which I had much fun during the past winter. It is powered by a two-cylinder motorcycle engine. The body consists of one-inch square yellow pine joined with 3/16th plywood and covered with un- bleached, doped cotton fabric. The propeller is made of white pine tipped with linen cloth and doped, weighing four pounds including the hub. The runners are made.of oak and the runner blades [Continued on page 28] 26 Accept No Substitutes! Always Insist on the Advertised Brandt

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BU I NG BOOKS Gt : : sent : ! Eea : a -FREE BIG VOLUMES Don’t send us a cent—just your name and address and we ship all of these books to you for ten days free examlnation. Look them over carefully, seo how easy it is to find out the things you want to know, and then decide whether or not you want to keep them. "The price and terms are so low that everyone should have them on hand for ready reference. Billions of dollars are being used to make jobs and ihe Home Modernization Program offers the biggest chance to make money carpentera have ever known. Are YOU ready? Can you remodel from start to finish—do you know the tricks of estimating, laying out etc.? Here’s your chance to get these facts—quickly—easily, withou study or work—just put your finger on what you want to know Instantly. Carpenters, Architects, Contractors, Home Builders A gold mine of facts can often be converted into a gold mine of dollars, for builders save money and learn how io make more money with tne iive big books on architecture, carpentry and building. Carpenters make themselves contractors by learning how to estimate correctly; contractors are able to handle bigger and more Erohtable jobs by learning how the big fellows do it. Men who want to uild homes can save money by learning how it should be done. The new Jiffy Index puts before your eyes without wasted time, the things you want to know, Nothing overlooked. Use of tools, building construce *ion, heating, lighting, plumbing, architectural drawing; all covered. These Drawing Instruments (5/52?) Included unc J Complete set of drawing instruments if ou send for these building books NOW, hese instruments are made of the finest German sllver, are absolutely accurate and are packed in velvet lined leatherette pocket case. Real $10 value, but free to Ie you with these books. 3 A -eana mammum mammam mm m American Technical Society, A Drexel Ave. at 58th St., Dept. 6-5320, Chicago, I. I would like to look at the five books described above. Send them on your free offer. I will pay the few cents delivery charges only and will examine them thoroughly nnd return them in ten days unless I like them, in which case I will send you 52.00 and after that $3.00 per month until the total price of only $19.80 is pald. You are also to send me the drafting Instruments and consulting membership certificate of the American Technical Society, without extra charge.

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il Qualify for U. S. Government License In 6 Months 74 Recognized as one of America's finest in Radio- Television -Training, First National's course is so thoroughly organized you can qualify for U. S. Gov't. operator's license in-6 months. That's your ticket to the big jobs. Learn In Our Broadcast and Television Stations-six short months intensive training with actual experience ‘‘on the job” at the controls of Radio Station KXBY and Television Station WOXAL fits you for the big jobs in Radio. Don't miss this chance at SUCCESS! Write today for complete information. FIRST NATIONAL TELEVISION, INC. (Hivision Dept. 66-5, Power & Light Bldg., Kansas City, Mo. BIG FREE BOOK TELLS ALL Mare RRES m Pet SAS fm SE sp sd AS AS U

IST Vc Nn Li

Editor's Workbench Chips [Continued from page 26]

i i Powered by a two-cylinder motorcycle engine, this ice sled provided many thrilling moments for M. S. Zann, of Bay City, Mich, Runners have knee action and the big fin aids stability. are of 3/16th steel. Runners have knee action, steer- ing being accomplished by the rear runner. The big tail fin gives better control at high speeds. An ardent MM reader for 10 years, I am, M. S. Zann Although Spring is almost on us we couldn't resist running the photo of Zann's snow sled. Its streamlining attracts the eye.

Readers who would like to exchange news, views, and ideas will find an enthusiastic cor- respondent in John P. Lowden, of 44 Victoria Park Road East, Cardiff, England, who writes: Dear Editor: I am writing to ask you if you can put me in touch with MM readers in other parts of the world who would like to undertake correspondence with me. Your magazine is excellent, but I would like to see more features in each issue, 1 especially enjoy the articles on photographic subjetts. John P, Lowden dope The giant Queen Mary ocean liner has intrigued many model builders and to Billy Glenn, of Gas- tonia, N. C., who sent in a letter and photo de- scribing an excellent reproduction of the liner, MM has awarded a prize of $3. He says: Dear Editor: . I have been reading MM for several years and think it is the best magazine of its kind. Although I am only 14 years old, I enjoy it and find its plans easy to understand, I am enclosing a photo of my model of the "Queen Mary" which I recently completed, Why don't you run some articles on crystal radios? Billy Glenn The model Queen Mary would be a welcome ornament for any club room or den and Billy is to be complimented for constructing it. ` [Continued on page 152] 28 Accept No Substitutes! Always Insist on the Advertised Brand!

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Make powerful arc light, generato ultra-violet rays, make electric stove, elec. door ock, etc. Build radio circuits, crystal set. 2- tube circuit, AC-DC set, code practice set, 110- " Wit rectifier, scores more. Value $18.50. NOW. E BOOKS with kit. Elec.-Radlo Short Courses, Fan with Elec., Elec.-Are, Motor Transformer, Exper, Laby. Plans. 3c ntam»? bringa Elec.-Radio Tor] bargaln catalog, ELECTRICAL SALVAGE CO., Box 524-A36, Lincoln, Nebr. HAWAIIAN GUITAR the Hawaiian way. Surprise and entertain your friends. Amazing new simple method makes learning to play from REGULAR PIANO MU- SIC as fascinating as a game. Shows you in pictures how to do 1t. Previous musical train- ing and talent unnecessary, Earn while learning by new plan. You pay for the lessons just as they are received. Write today for free information. A poste LEARN TO PLAY THE -25¢ card will do. (Fine guitars supplied $5 up.) ren ACADEMY OF HAWAIIAN Music Develop your ability with personal in- struction from an Internationally-known care drawing and creating ideas makes it easy to attain success. Write for details of this excep- tional home-study course. No salesman will call. Sensational PRINT-O-PRESS Does Work $ 95 Stencil Duplicator. Prints post JJ circulars. Many advance fe Complete tures. Fully Warranted. User Agents Write, free. B i Professional Products Dept. 515 Silverton, Ohio LESSON Dept. 37-1, P.O. Box 163, Maywood, Lll, toonist. Ilis exclusive, successful method of NATIONAL SCHOOL OF CARTOONING, 437-D Penton Building, Cleveland, Oblo cards and up to 81x11 letters, Samples of work sent ORDER DIRECT ogay at HOME Prepare quickly in spare time, neceagary, common school education sufficient. Splendid opportunities. No previous experience, ficient Many earn while learning. Send for free booklet “Opportunities in Modern Photography: ' particulars and requirements. ... . AMERICAN SCHOOL OF PHOTOGRAPHY, — 3601 Michigan Avenue Dept. 2055 Chicago, Illinois. Easy method. When Answering Advertisements Please Mention May Modern Mechanix More Money Per Week *'Coyne Training has helped me to keep a job during the depression... I am making more money per week than I have ever made before.’” J. J. Broadwell, S. Car. An Increase in Salary ''Since my gradua- ation, I have worked every day and with an increase in sal- ary. Joseph Schuster, O. Thousands of Trained Men Make 130-40-50 a Week Eam TRAIN AT YOUR START ! Progress With CoyneTraining ‘My progress | so far has been made possible only with the training re- ceived at Coyne.’’ z Walter E. Ellis, . Car. COYNE FOR Easier Hours **Before coming toCoyne, I was & farmer working early and late.. iI now have a$goodijob.'" 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It is this practical job training that enables COYNE to train you for a better pay job. EASY TUITION PAYMENT PLAN— LOW COST BOARD AND ROOM PLAN Man alive, don't waste the golden years of your life saying: "E can't afford specialized trainingl" Send for my catalog — see how we help graduates, A special plan takes care of living expenses. Get training first, then pay tuition in 18 easy payments, starting 5 months after you begin school. PART TIME EMPLOYMENT— AIR CONDITIONING, RE- Need part time work to help pay FRIGERATION, DIESEL living expenses? Write and tell us, included — extra instruc We have helped hundreds. ` tion without extra cost. JOB AFTER GRADUATION SERVICE—We keepin touch with many large firms, ready at all times to supply their needs for trained electrical men. Graduates get Free Lifetime Employ Send for the big FREE COYNE Book of facts... jobs... salaries » - « opportunities . . . photos. See PROOF that we assist graduates— PROOF that COYNE training pays! CLIP THE COUPON RIGHT NOW! SEND IT! There's no obligation. ee MANARE GER X GARS RC GNE Mr. H. C. Lewis, President. COYNE ELECTRICAL SCHOOL, 500 S. Paulina Street, Dept. 57-53, CHICAGO Send your Big FREE Illustrated Catalog. | Name. .-eeeeeeessesesee sene nene ee eene Address. eee eeee se seseeseosososssssoososavosevesvacee States sce rrt City. pue 29

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' 30 Years Required to Make Clock . Nic Sprank Offers $5.00 For Best Oddity dum KEEP o PEP OFF T SERE TRAIL lal B\nimar SIGN!- THE PERSON WHO Pt THIS SIGN ON JUNGLE TRAIL IN SPANISH -SPEAKING PANAMA FXPECTED NOT ONLY THATANIMALS SHOULD READ BUT THAT THEY SHOULD READ ; ENGLISH! — FRANCIS TYLER, PENNYAN, NY. 3O YEARS SPENT IN BUILDING CLOCK! CHRISTIAN GEBHARD OF GERMANY SPENT THREE DECADES IN CONSTRUCTING THIS ELABORATE CLOCK WITH THE AID OF HIS SONS, L.X. AND R.L. IT CONSISTS OF 15,000 PARTS, WEIGHS 6000 POUNDS AND DISPLAYS Z 26 DISTINCT MECHANICAL AND ASTRONOM- ICAL MOVEMENTS, ALL PROPELLED BY ONE WEIGHT, MEAN, SOLAR, SIDEREAL AND DECIMAL TIMES ARE. INDICATED. CALENDAR CHANGES HAVE BEEN CALCULATED FOR 300 YEARS IN TADAN LAND À BUGLER ANNOUNCES EACH NEW YEA it . W.WEBB, LOUISVILLE, Lu. 18H CA S UN [INE To FURNACE! -MRSWBFORD OF NORTON, VIRGINIA ,HAS ACOALMINE OPENING INTO HER’ FURNACE ROOM. COAL 15 DUG UNDER HER GARDEN lil ApiuM POWER!—GAMMA RAYS EM- ANATING FROM ONE OUNCE OF RADIUM ou lil EQUAL 3,750 HORSE POWER DAYS WHICH AND BROUGHT TO THE FURNACE IN A WOULD BE SUFFICENT POWER TOLIFTA 39, SMALL CAR:—J.F. DOPACK JR.,CHICAGO,ILL, 000 -TON SHIP.- CHAS.CWEIKALWICHITA, KANSAS, Five dollars will be paid for the oddity used by Nic Sprank as his central illustration. One dollar will be paid for all others used on this page. Send your oddity to Nic Sprank, Modern Mechanix Publishing Company, Fawcett Bldg., Greenwich, Conn. Source or proof of each oddity must be given. Send all oddities separately, not with other manuscripts or letters. 30

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AVIATION S FUTURE A Guest Editorial OR the immediate future, it seems evident, avia- tion and the aircraft industry must depend to a great extent upon the operations of air lines for growth and sustenance. This transport business is .8 cold-blooded economic matter and that means that efficiency of operation will continue to be the main object. As a correlative, greater speed will ; be sought. ; The industry has gone through several years of Birds weg. c intense development and improvement of motors and planes. Unless some radical change is made in design, which none of us can foresee now, the next development will be to go to higher alti- tudes by supercharging the engines in order to take advantage of the lower air resistance offered by the sub-stratosphere. Thus, greater speeds will be possible. Speed is what we have to sell and development of the controllable pitch propeller and super- charged engines have made sub-stratosphere flying, with its greatly increased speeds, a. coming possibility. New planes will be developed which will widen the time-saving gap between airplane and railroad travel. Flying efficiently at 20,000 to 25,000 feet altitude, they will be used princi- pally for trips from either coast to the midwest, or for non-stop transcontinental hops. Because of the time involved in gaining and losing altitude between points sub-stratosphere planes would not be practical for shorter flights. Whatever happens, we in the aviation industry are certain we shall go forward at an amazing rate. Aviation will not be as long in developing as the railroads were. It is aviation we have our money on and we're sure it will win. Burdette S. Wright President Curtiss Aeroplane & Motor Company ` May, 1937 i 31

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JUST Another BRINGS INVENTOR With her husband end four children on relief, Mrs. Anna J. Green- wich of Chicago sold a hair curling device which put her on easy street. She paid back relief funds and saved her home besides. by H. H. Slawson NOTHER gadget has rung the bell and brought its inventor a fortune. This time it's a 70-year-old grandmother, Mrs. Birdora H. White, of Chicago, who draws the big prize. After a 20-year struggle for recognition, Mrs. White has sold for $350,000 the exclusive right to the use of a simple little buckle of her invention on overalls and work garments made by one manufacturer. She still holds other valuable rights in the patent. So simple does the buckle look that judges in the Patent Office àt Washington were almost affronted and scornfully asked, “Why bring that in here?” “Just another buckle,” one of them ex- claimed as he disdainfully fingered the model and recalled how he had a buckle “just like that” on his jeans 50 years ago. Attorneys convinced the court otherwise, however, and a patent was granted. Then Mrs. 32 . E White experienced years of ups and downs, marked by discouraging rebuffs from big industrialists, by expensive promotional ex- periments, costly infringement fights and destructive price wars in the buckle business. It was in 1915 that the idea for her buckle first came to Mrs. White. After 15 years as a widowed school teacher with four children to raise, she had started, at 50, to learn the corset business. Within three months she had designed an im- provement on a “clumsy” hose supporter. “When I showed Dr. Vladimir Zworykin with his cathode ray tube. e the large end, and then are projected onto a mirror. "bottled The broadcast pictures television” appeat on Modern Mechanix

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this to a friend,” she relates, “she remarked that it would make a wonderful overall buckle. Then I began noticing how men use bent nails, slivers of wood or big knots to help hold up their over- alls. So I started figur- ing on a buckle suitable for such garments, “More than once in the discouraging years that followed I was tempted to forget it. I was spending the best part of my life on a little buckle and not getting anywhere. Inever seea little gadget now with- out wondering if the in- ventor suffered all the grief I went throug Mrs. White's success is not unusual. The rub- This amazingly simple overall buckle brought in $350,000 to Mrs. Birdora H. White, 70- year-old Chicago grand- mother, But it’ took her twenty persevet- ing years to sell it. ber tip on your pencil, the clip on your pen, the rubber-wrapped button on your garters, the snap fastener on your gloves, the zipper on your jacket, that collar button which turns down in the back, your suspenders, your safety razor have all brought Aladdin-like fortunes to their inventors. Gillette, of razor fame, for one, is said to have made $2,500,000 annually, for years. |“ Chicago alone, where Mrs. White lives, has been peculiarly prolific in producing out- standing inventors who started in a humble way. One thinks of Pullman and McCor- mick, of Charles E. Scribner, of the Crane brothers, of William Seelig, Lee De Forest and Vincent Bendix. Almost daily that city’s honor roll grows. Dn Willis R. Me IA who Bias ver vay to put - From Colorado came two brothers, O. S. adio waves to wor curing ame muscies ani joints 4. caused by hard calcium substance in the body “oil.” [Continued on page 144] May, 1937 : 33

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England Equips Navy With Torpedo Plane Fleet A fleet of Fairey "Swordfish" planes of the type shown above is being built in England to augment the nation's mighty navy. Slung beneath each plane is a deadly 1425 pound torpedo. Pencil Holds Memo Paper LAIMED to be the first complete writing unit, à new automatic pencil manufac- tured by a N. Y. City firm, holds a three-foot rcll of memorandum paper within its barrel. The paper protrudes from a slit which has a sharp edge to facilitate tearing. The paper is obtained from the barrel by turning a knob at the top end of the pencil. After the sheet is pulled out as far as desired, the knob is turned in a reverse direction to lock the paper roll. The paper is then torn by pulling it against the sharp edge of the barrel slit. Paper refills for the pencil are easy to insert, the pencil being held vertical with the point down and the knob turned and pulled up- ward. This slides the inner paper holder from the barrel. Lead refills are inserted by unscrewing the two sections of the barrel at the center. This novel automatic pencil carries its own supply of memo- randum paper on a roller within its barrel. A quick turn of the pencil top and any desired length of paper is at hand. 34 NDEAVORING to increase the attacking power of her mighty navy, England is equip- ping her Fleet Air Arm with air- planes of a type capable of carry- ing a 1,425-pound torpedo slung beneath the fuselage. Known as “Swordfish,” the planes are pow- ered with 690 H.P. Bristol Pegasus engines. The speed and other perform- ance figures of the torpedo planes are unavailable, being treated as a military secret. Roaster Prepares Full Meal The cake held by this young lady was baked in the device shown packed with food. Each of the grooved compartments holds a single food, enabling all to be cooked at once. EATURING five grooved compartments in which a well diversified meal for five persons ean readily be prepared at one time, a double section roaster has been developed by a Buffalo, N. Y. manufacturer. The two sections of the device are exactly alike and separable, fitting together by means of slip hinges and clamps. When closed, the compartments are sealed tight so the aroma of one food does not affect another. Modern Mechanix

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Combination Plane-Auto Enters Low Price Field COMBINATION airplane and automo- bile to be sold in the low price field, has been developed by the Waterman Arrow- plane Corporation of Santa Monica, Calif. Powered by a six-cylinder Studebaker au- tomobile engine, the plane is so designed that the wings are quickly detachable. When operated as an automobile, the pro- peller is declutched and power is transferred to the rear wheels. The plane is capable of a 70-mile-an-hour land speed and a 120- mile-an-hour air speed. Quick Replacement Of Lamp Eliminating electrical and climbing hazards, this lamp fixture permits worker to lower lamp away from electrical circuit. Pulled up into position, lamp automatically latches into circuit. O ELIMINATE electrical and climbing hazards when cleaning or replacing high industrial lamps, a Cleveland, Ohio, inventor has devised a hanger fixture to lower the lamp away from the electrical circuit. To latch the lamp into operating position, the lamp is raised until its lower member contacts the upper one. To lower, the opera- tor, with one pull, releases the lamp. May, 1937 Top-—New Arrowbile ready to fly. Below-—Wings detached and ready for operation as an automobile. Using a Studebaker engine, the vehicle is capable of a 70-mile-an-hour land speed. Rubber Fills Tree Cavities NEW form of tree surgery employing rubber to seal up cavities after decayéd | wood is removed, has been developed by George Van Yahres, well known eastern tree expert. i A Of specially compounded rubber, it pro- vides a simple but permanent seal against air, moisture and insects. Flexibility of ma- terial permits swaying and twisting with the tree without cracking. E v Rubber strips seal cavities in trees after decayed portions are removed, resulting in a permanent seal against air, moisture and insects. Flexibility permits sway and twist without cracking. 35

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Building *T»LAYING with trains," is what people used to call it, and playing with trains is what some people still call it until they see a real model railroad system and realize the study and planning, the vast amount of de- tailed mechanical and electrical work, and the craftsmanship that are necessary to build it. For model railroading is no child's play, but a full fledged hobby, worthy of the best spare time efforts of the 25,000 or so Americans engaged in it. Perhaps it's the very challenge to their abilities that makes this pastime so popular. A model railroad is never finished, and the better the builder's work becomes the further his ambitions surge ahead of his ac- 36 William Pinter, of Gar- wood, N. J. (circle), proudly exhibits his Tiny Tom 00-gauge locomotive and tender built from MM plans. The popular model is patterned after a Southern Pacific Railroad engine. No Child’s Play Is This Fascinating Hobby, But a Challenge of Ability. by A. C. Kalmbach complishments. Machinists, electricians, and engineers are not the only ones who tackle the problem of reproducing to exact scale rail- road equipment and railroad operations. By far the largest part of these 25,000 model rail- roaders are bankers, lawyers, executives, office men, and clerks who never met a hand drill face to face before. To them soldering was a mystery, scaling plans something to be left to the draftsman and architect, and the Modern Mechanix

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A general scene (above) on one of the 0-gauge systems built by Minton Cronkite, of San Marino, if, who has the largest individually owned model railroad in the U. S. So realistic is the system that the Sante Fe Railway borrowed it for display. purposes at the Texas Centennial Exposi- tion. Right—Like a view from a signal tower is this stretch of “pike” as seen from overhead. railroad merely a way of getting somewhere quickly. Model railroading was popular in England even before the war, and while a few Ameri- cans had built scale models of one kind or another before that time, it was not until 1927 that the idea of building really comprehensive miniature systems to exact scale was at all practiced in this country. The beginning was in the east, around New York City, and the earliest builders modeled mostly Pennsyl- vania equipment (until you are a model rail- roader you never fully realize the individual- ities of the various large railroads), and to this day Pennsylvania equipment is most used as a prototype. i At first this scale railroading was largely a rich man’s hobby. It took either lots of time, or lots of money to buy someone else’s May, 1937 37

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time. Most of us were too busy making money in 1927-1929 to spend it on hobbies. Then came the depression and a vast increase in leisure time. The fascination of the railroad combined with the allure of the home work- shop. One model railroad in a neighborhood started others and the hobby grew like guinea pigs. Since 1934 the growth has been rapid. The cost limits of a model railroad system are practically indeterminate. A system can be built for a dollar a month. It takes careful planning and lots of work. Systems have been built costing up to $50,000—and there’s still plenty of work left on the $50,000 system to add interest and keep the owner busy in his spare time. The total spent in the U. S. on model railroad parts and on completed models is somewhat more than $300,000 a year. Some of the men early in the hobby, cast- ing about for fresh business opportunities during the depression, started companies which supply plans, castings, machined parts, and now can sell you freight and passenger cars, locomotives, and track in any form, from rough materials to completely finished units that need only installation. The hobby kit is most popular. In this kit the various parts of a locomotive or car are partly finished, so that work left to be done consists only of drilling, tapping, and soldering. The assembly can be accomplished on the kitchen table. Two box cars built by John Borges, of Boston, Mass., are shown below. Perfect replicas of freight cars, they are for HO-gauge, the smalíest size used. ES A large freight engine ESI modeled in O-gauge by William Lenoir, of West Chicago, Ill, is shown at the left. Notice the com- plete piping detail. The head- light has transparent number i plates on each side of the i casing. —Circle—A realistic F railroad scene is presented by these models as they pass each other on a curve. Finished models cost from $45 up for loco- motives, from $5 up for cars. The materials for track cost from six cents a foot up. Per- sons able to afford it often buy much of their material finisħed and yet lose little if any of the fun, for there is still plenty to do, plan- ning right-of-way, building scenery, arrang- ing schedules of service, signalling, ete. A model railroad is never finished. It’s a lifetime hobby. The man with little money for non-essentials buys as little outside as he can. Rail, spikes, and rail connectors are his track materials. He makes his own ties. Castings for a few parts, wheels, couplers, gears, and motors are about his only pur- chased materials for rolling stock. Very often he turns out finer work than the best pro- fessionals, just because he can afford to put

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Live steam for model locomotives has its fascination although most miniature systems are electrically powered. The train shown in the photo at right is owned by A. R. Horner, Ahwahnee, Calif. Puffing, it valiantly tackles a steep grade. plenty of time into his work, and because he takes pride in his craftsmanship. It's the construc- tion angle that intrigues him. Roughly 90 per cent of the model railroaders are in the kit class, buying their equipment in the shape of finished or semi-finished parts. The remainder are about equally divided between those who — : ', buy finished models and those who build from the ground up, buying nothing but the raw materials. These last are the real craftsmen of the hobby. For them one train is an accomplishment, a product of years of labor. Two hundred hours on a locomotive is not unusual. Because of this, they seldom have as complete systems as the men who buy at least some of the parts. Imagination is important, perhaps para- mount, in model railroading. Suppose you want to start a model railroad. You survey the attic, basement, or perhaps back yard with C. F. Robbins, of Keene, N. H., demonstrates pulling power of his scale model Timkin locomotive. coal. Upper photo—A finely detailed 0-gauge model of the famous English "Red Hussar’? locomotive. an eye to the possibilities for.a railroad route that will move traffic from one place to an- other, or at least have that appearance. You select a name for your "pike," elect yourself president, chief engineer, and man of all work. You write for catalogs of perhaps a dozen supply houses to get an idea of what each can offer both as to prices, railroad prototype, and quality. You read the model magazines (there are three, one of which is devoted exclusively to model railroading) arid see what others are doing so that you [Continued on page 141] It burns

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PRESENT MOUTH n THE HUDSON RIVER BOMBS and RADIO USED in SURVEY of Hudson Gorge te Ves OS N uro | ABOUT I: o w^ s TIE MILES SEAT ^ DASHED ` WARD FIREISLAND LINES SHOWS LIGHTSHIP PASE ^ A “sone, 4 Sunde ay Ht JONDE "BY STATION En e SATO RES , VESSEL aS ANCIENT " ONE j| RESULT OF THIS SUR- VEY : BY FOLLOWING uU : : we ee CL fs Beenie Ko GORGE A Sonar MEASUREMENTS ; o VESSELIS A MADEATSEA Bout PERTH m. ABLE TO MU BY RELATING i B. FIXED SHORE F | MTH TRE: 7 STATIONS KA AID OF THE — 9 FSFATHOMETER ALONE de^ A NT BOMB CAST S Z^ ms j^ FROM SURVEY PIE Em (WM {sie SETS up A 5 CUM «c eoo | save or, ———— |) RECORDS THE, z | | INSTANT OF THE ee =x OMB'S EXPLOSION AS ERTHOMETER Y AND THE INSTANT > — EBNUOUR — | SIGNAL IS RECEIVED NEU, — BY Gans AA VESSELAQGWING 7| —— SOUNDING, ^ SPEED or SOUND LAND , CATCHES Buovs SUBMERGED DISTANCE OF SHIP" HYDRO Ni BUOY IS [ow m : E E N m. AE DETERMINED LAYS IT [ URE SAP. MACH FROM LAND ^ s United States Coast and Geodetic Survey vessels completed a hydrographic survey of the outer Hudson submarine gorge ap- proach to N. Y. City's harbor involving 8,290 square statute miles. Over 171,820 soundings were recorded in charting the ancient gash made by the Hudson River in its fall to the ocean. During the spring months, adjacent sections of this interesting coastal feature will be surveyed. Method used in determining depth, width, and course of gorge is graphically shown above. 40 Modern Mechanix

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Mechanical Elephants Walk 500 Miles SED for advertising purposes, two mechanical elephants constructed by J. G. and George Shrum, brothers, of Miami, Fla., have walked over 500 miles through the principal cities of the state. Both elephants are operated by eccentric gears and travel on rubber tired wheels in a walking motion. Powered by a single cylinder motorcycle engine, the completed smaller elephant stands 7 feet, 3 inches high, 11 feet long, and 415 feet wide. Costing $800 to build, it is controlled by a steering apparatus at the base of the head and has a walking speed of 6 m.p.h. The larger elephant stands 10 feet, 9 inches high, 14 feet long, and 8 feet wide. Powered by a four-cylinder motorcycle engine, it has a walking speed of 7 m.p.h., and cost $8,000 to build. í Aero Radio System Devised * i LOCALIZER, This graphic illustration shows the airport localizer radio system developed by United Air Lines engineers. The tri- angular antenna sends out beams to lead pilots to the airport. EATURING a triangular umbrella type antenna that eliminates distortion of the radio beam path caused by weather condi- tions, a new radio range system has been developed by United Air Lines engineers. It is claimed the system makes positive radio identification of exact airport locations pos- sible. Serving as an aerial switching system, the United localizer beam intersects the regular airway beam at a point 30 miles from the landing field. Pilots follow its path of radio signals until they are directly over the airport, -an invaluable aid in bad weather. May, 1937 J. G. Shrum (top), of Miami, Fla., sits atop a mechanical ele- phant built by himself and his brother, George. Lower photo —George Shrum shows the elephant uncovered. A motorcycle engine, eccentric gears and wheels enable the elephant to walk. Tractors Launch Life Boats LIMINATING the back-breaking work of pushing a heavy life boat over sand, Coast Guard units in the Netherlands are using special caterpillar drive tractors for launching their boats into the surf. Each boat rests atop a metal truck which is pushed into the surf until the boat floats free. Pushing heavy life boats over sand for launching is eliminated by Netherlands Coast Guard units by using special tractors and trucks to push boats into the surf until they float. 4

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MECHANIZING by J. R. Robinson The new Justice Building (above) in Ottawa, Canada, housing the Department of Justice, is also headquarters of the Royal Canadian Mounted Police. From here orders are issued that activate Mounties in solitary outposts in the furthermost reaches of the Canadian woodlands. Major Gen. Sir James MacBrien, com- missioner: of Royal Canadian Mounted Police (left) introduced airplanes into the service when he became chief over six years ago. «« A RE you able to drive an automobile? Can you use a type- writer? Are you qualified in shorthand?” Hollywood won’t like it known, but those three questions are from the latest recruit examination papers of the Royal Canadian Mounted Police. The days of Reading, 'Riting and Riding, the three R’s of the old “Northwest Mounted” are past forever. Hum of R.C.M.P. motors and chatter of R.C.M.P. keys drown out the last clatter of hooves. Not stable fatigues but classes in practical mechanics blight young policemen’s hopes of high adventure. The Mounties have gone modern. Plain figures plainly set down best show what has happened to the riders of the plains and their traditional means of loco- motion since the days when a horse for every man and a few Modern Mechanix

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The Mounties "Get Your Man The Quickest Way," Now Canadian Police Creed. The modernized R. C. M. P. has 19 speedy power boats, of the type shown above, to combat smugglers. Right-—Sketch show- ing the Mountie as popularly portrayed in fiction. Today, only 300 of 3,000 men are horse-mounted, although all must know how to ride. spare mounts for luck was the rule of the service. Today, there are in the Royal Canadian Mounted Police 2,500 men, 387 sleigh dogs and 300 horses. The list of R.C.M.P. mechanical transport includes 442 cars, 28 motorcycles, 19 trucks, 19 power boats and one Arctic supply ship. In addition the force uses, in its preventive service on the coasts, a small fleet of Royal Canadian Air Force seaplanes. Mileages for the last year of record mark even more clearly the eclipse of the horse in the Royal Canadian Mounted Police. The distance traveled on duty in the year was May, 1937 13,506,632 miles; an average of 5,402 duty miles for every member of the force. Nearly seven million miles of the total was covered by motor, just over six million by railway and steamboat, more than 300,000 miles by coast, lake and river patrol boats, close to 200,000 miles by airplane, 50,000 miles by dog team and not enough miles on horseback to be worth recording. The force has come a long day’s ride since the spring morning in 1874 when 300 redcoated, white-helmeted young horsemen started west from old Fort Garry to carry out the words of the newly created “Mounted.” The 300 had enough to do in their day. They had to deal with liquor smugglers, cattle rustlers and horse thieves along 800 miles of boundary, to convince 20,000 short-

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Air patrols, made in seaplanes of the Royal Canadian Air Force (above), are part of the routine duties of the mechanized R. C. M. P. Mounties travel about 200,000 air miles yearly. (Royal Canadian Air Force Photo.) tempered redmen that the new rails going down across the prairie were better not torn up, to mete justice, fight prairie fires, and generally to guard life, property and the Queen’s peace over 2,300,000 square miles of Canada’s Northwest Territory. That task was well done. That day is over. Today, the boundaries the R.C.M.P. patrol run west from Atlantic to Pacific and north- ward from Campobello Island and Cape Flat- tery to far beyond the Arctic Circle; the law- breakers they hunt are more likely to be members of international dope rings than simple horse thieves, and their tasks have multiplied with the years. Reporting on the vagaries of the Aurora Borealis, card- indexing fingerprints in an Ottawa office, tracking an Eskimo killer across 300 miles of ice floe, trailing a smuggler to Spain and back, enforcing Dominion wild life laws, rescuing a flight-weary wild goose from small boys, these are all in the mixed bag of a present- day Mounted policeman’s duties. In few of the thousand jobs that may come out of the bag is his old friend, the horse, much use to the Canadian Mountie. Sir James MacBrien, flying commissioner of the Royal Canadian Mounted Police, who, in 30 days made an 11,000-mile inspection of posts, a trip that once required three years of tedious travel by ordinary surface means of 44 Motor cars are used by the Mounties ‘in ever increasing numbers. Nearly seven million miles are covered annually by auto patrols using 442 cars owned by the organization. Photo shows, left to right, Constables Greene, Cooper and Ross of the Regina Town Station. transportation, tried, not long ago, to comfort alarmed romantics among his countrymen. The horse, he said, was still assured of a place in the Mounted Police. There was “no in- tention whatever of dispensing altogether with the mounted men.” The intention was only to segregate horses and horsemen in a mounted section to be used for ceremonial parades and in “dealing with unruly crowds.” A “mounted section” in the Mounted Police— Sic transit gloria equi. But when lawlessness takes to 12-cylinder engines and short wave radio, the law needs more than hooves and horseflesh to keep up with it. The force itself sees small cause to lament the mechanization of the Mounties. Getting your man being the essential thing, the quick- est way of getting there to get him is the best in R.C.M.P. opinion. That's why the Mounties rode horses in the ’seventies. That’s why they ride in motors, power boats and airplanes today, when they aren’t driving dogteams across the ice hummocks of the last frontier. The Mounties have been going modern from Modern Mechanix

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The figure of the trooper and his horse (right) is fast reaching the point where it can only be seen ‘blazoned on the covers of magazines and in motion pictures. Not enough miles are covered on horseback by modern Mounties to make the matter worth mention in official reports. Plane, car, and speed boat crowd the scene. their beginning, and always from within. Mounted police records of sixty years sup- port the claim. There was, for example, a dangerous innovator named Jarvis. He was superintendent of a prairie division and, as -far back as 1886, he was writing headquarters [Continued on page 129] May, 1937 The broad brimmed field hats, recog- nized as the trademark of the Mounties. were adopted in 1896. Before that time, the men wore “pill box" hats of a type shown in photo at left. Above -— Motorcycles have extended the modern Mounties patrol range.

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Device Indicates Using a model auto mounted on a turntable, F. H. Shepard, r., demonstrates his device that indicates speeding vehicles passing its electric eyes. Left to right ——Police Chief James McMenamin and Public Safety Director W. S. Cuthbert, of Atlantic City, Shepard, and Dr. Otis Caldwell, noted scientist. Youth Wins Model Trophy TAGED as part of the Philadelphia Air Observance Week program, a model con- test was won by Arthur Koslow, 15-year-old local schoolboy, with a flight of 15 minutes, 11 seconds. Igor Sikorsky, noted airplane de- signer, presented the youth with a trophy donated by Frank Palumbo, Philadelphia sportsman. Koslow’s model was of the stick endurance type, powered with a rubber strand motor. The wings were covered with transparent micro-film which has a weight only one- eighth that of tissue paper. Aviation authorities recognize the value of model plane building and contests are now featured at many exhibits of real aircraft. Igor Sikorsky, famous airplane designer (right), presents trophy donated by Frank Palumbo (center), to Arthur Koslow whose micro-film covered model flew for 15 min., 11 sec. 46 Excessive Speeding Of Autos NVENTED by F. H. Shepard, Jr., of the Radio Corporation of America, a new electronic device indicates when the speed of any vehicle passing its photo-electric cell eyes exceeds a pre-determined rate of motion. Roadside installations of the device will make it unnecessary for motorcycle policemen to keep constantly on the go, pacing the general movement of cars over their patrol routes. In operation, two of the devices will be placed one-quarter of a mile apart. Cars passing the first electric eye at excessive speed will cause it to flash a lighted warning sign. Failure to slow up will cause the second eye to light up and a posted motorcycle police- man will then issue a summons. Huge Pantograph Developed This electric pantograph machine enables the operator to trace the contours of a model with a right hand tool while a left hand tool reproduces the design on a die block. HUGE electrically powered pantograph machine for reproducing die designs from an enlarged model has been developed by a manufacturer in Racine, Wis. The device has nine spindle speeds between 1,100 and 9,200 r.p.m. The model from which the die is to be made is set up in a holder and a die block is secured beneath a cutting attachment. Trac- ing the model contours with the holding tool, the cutter reproduces the contours in the die block. Modern Mechanix

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MECHANICAL DEVICES Help the Blind ECHANICAL devices in the form of spring and electric powered talking machines, relief maps, and machines for typing Braille, the system of raised dots “read” by the blind through their fingertips, are being used to make the lot of the sightless less burdensome. The talking machines, built under the su- pervision of the American Foundation for the Blind, are the property of the Library of Congress. They are used to afford the blind the pleasures of literature without requiring mastery of the intricate Braille system, com- plete books being transcribed on records which can be listened to by individuals or groups. The machines and records are loaned to libraries throughout the country without charge. Records for the machines cost about $75,000 annually and about 165 titles are recorded. Titles range from transcriptions of the Old ._ Testament to the latest fiction novel. A full recording of an average novel requires both sides of 15 records. Through their sensitive fingertips, trained by a study of Braille, blind students can study history and geography Under supervision of qualified teachers, blind tudents are taught to ype on a machine (above) that prints let- ES ters in the form of raised E dots (Braille). Below— Blind proof reader read- ing text from a Braille transcription to a teacher. by tracing the contour lines, dots, ete., on special relief maps. Produced at the Perkins Institute for the Blind at Watertown, Mass., under the super- vision of its director, Dr. Gabriel Farrell, the maps are distributed by Works Progress Administration em- Specially designed electric tafking machines (shown above) enable the lind to«enjoy literature transcribed on records. ployees. May, 1937 | 47

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Mechanical Devices Feature Show

REVOLVING : STAGE SIDE STRUCTURES ameter ET EQUIRING 63 stage hands to operate mechanical devices, the play “White Horse Inn,” at the Center Theater in New York City, creates a record for the application of mechanical ingenuity in the production of a major show on the legitimate stage. In its 22 scenes, involving 12 changes of settings, the show features a revolving stage, a moving steamboat, movable restaurants, mechanical animals, a merry-go-round, a sight-seeing bus, and a mill. The electric power consumed at one per- formance is enough to light a small city. During a rain scene 150 gallons of water are drained off by an enormous funnel. 48

“<2 ND. MERRY-GO-ROUND ,ACT V -IN LAST A A 2 MILL.

STRUCTURES BUILT OUT AND TO THE SIDE OF THE STAGE ;

'The.many mechanical details involved in the production of White Horse Inn, at the Center Theater in N. Y. City, ate shown in the artist's sketch above. Electrically operated elevator stages, revolving stages, sound and lighting control rooms, a sight- seeing bus slung up out of sight until needed, and a moving steamboat are a few of the mechanical details of the show. A cast of 185 makes eight costume changes during the show and over 1,500 property effects, from plates to mechanical animals, are used. Photos show typical scenes.

Lightning and thunder effects are operated from a central switchboard which also moves clouds across mountains and controls the cen- ter revolving stage. Two carloads of lumber, two miles of canvas, and 1,500 gallons of paint were used in building the numerous artistic and gaily colored sets. Modern Mechanix

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Tuner Brings In Television And Broadcast Stations DEVICE which requires only the pres- sure of the hand on a lever to tune in either a television or broadcast station or both, is the invention of LeRoy J. Leishman, of Los Angeles, Calif. So precise in its operation that no stabili- zation circuit is required,.it will tune in a broadcast and television station in less than one-half a second. To place the tuner in operation for the first time, it is necessary only to tune in the stations, press down one of the levers, and "set" the set screw. The lever springs back into place and afterward needs only to be pressed down to bring in the desired station or stations. The tuner may be equipped with as many levers as desired for corre- sponding stations, and the “set” may be changed at any time. The invention not only provides for auto- matic tuning, but makes possible utilization of the present 23 million radio sets for tele- vision purposes. Sport Planes Go Amphibian Amphibious Float gear, adaptable to present popular planes, is brought out by the Edo Aircraft Corporation, of College Point L. I. giving the pilot an oppor- tunity to change from land to sea plane at, will. N AMPHIBIOUS float gear, adaptable to present popular planes, has been de- ‘signed by the Edo Aircraft Corporation, College Point, L. I. Each of the wheels in the main landing gear is supported by a pivoted yoke, which connects through a shock strut to a small crank concealed under the deck of the float. To raise or lower the wheels, the cranks are . operated in unison by a handle in the pilot’s cockpit. The wheel compartment is made air tight at the top. May, 1937 LeRoy L. Leishman, of Los Angeles, Calif., is shown demon- strating his invention which automatically tunes in either tele- vision or broadcast station, or both, merely by pressing lever. Electro-Magnets Clear Roads ESIGNED to pick up nails, pins, bottle caps, and other metal objects from the highway, which. constitute a traffic hazard, this electro-magnet was constructed by the Quebec Roads Department. Supported by its own wheels, this magnet, or series of magnets, is attached to the rear of a truck, and is raised or lowered as desired by means of a hydraulic cylinder mounted on the truck. A special engine and generator unit is mounted on the rear of the towing vehicle and furnishes electricity for the magnets. Covering eight feet of road width, the ap- paratus will pick up junk while traveling at an eight to 12-mile an hour speed. On one run, 18 pounds of metal were picked up during the time the magnets traveled over 12 miles of highway. The department plans to construct several more of these machines in the near future. Magnets attached to a Quebec Road Department truck clears an eight-foot strip of highway of nails, hooks, pins, bottle caps, and other metal objects, as it travels at an eight to twelve mile an hour speed. 49

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. Y BABY was born deaf and dumb," a mother said to me recently, indicating a bright, attractive looking little boy about four years old. *Oh, no, he wasn't!" I assured her promptly. “He may have been born deaf, but he. wasn’t born dumb any more than any other baby is. He hasn't learned to talk because he hasn't heard other people talking—just as you haven't learned to talk Russian because you haven't heard people speaking that language. His vocal organs are all right, and his mind is all right, and he can be taught." Only a few score years ago nobody would have told the mother of a deaf child anything like that. He would have been obliged to grow up not only speechless, but far worse. Because nobody could communicate with him, 50 he would have been considered idiotic. He would not even have learned to read and write. He would not have been allowed to inherit property; he could not have trans- acted even the simplest business. If his mother had taken him to a doctor, horrible things might have been done to him, for it was thought that his inability to speak was a thing apart from his deafness. His tongue might have been slashed or scraped, or his throat injured, in a misguided effort to give him the use of his vocal organs. In the 16th and 17th centuries, a few teach- ers discovered the possibility of educating the deaf, and taught certain isolated cases; and toward the middle of the 18th century groups of deaf children began to have a better chance in life. A French priest, named de l'Epee, Modern Mechanix

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Devices nol more conspicuous. than tles now amplify sounds sum- ie enable those with partial fto carry on conversation and to five normal lives. If only the middle ` impaired, tiny electrical oscil- behit! the ear can carry. sound ne structure fo the still ey éar Hf the inner and 4s affected, an air éenfamay be help- ; E osephine. Timberlake, author of this article and superinten- dent of the Volta Bureau, is pictured at the right ^ $ and a teacher in Germany, named Samuel Heinicke, established small schools. Heinicke taught his pupils speech and lip reading, the method used by the earlier teachers. De l’Epee tried to do the same, but his school was free, and so many chil- dren were brought to him that he was forced to devise a more rapid means of communication. He invented a system of signs to express ideas, and supplemented these by the use of a finger alphabet which had long been in use among monks who had takeri vows of silence. His sign language, greatly amplified and im- proved by his successor, was the fore- runner of that which is beloved today by many adult deaf persons in all parts of the world. Its use in schools is frequently May, 1937 Advances in lip reading, perfec- tion of electrical devices lessen hard of hearing terrors.

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CAN ME? George Cook, a Buffalo, N. Y., instructor in lip reading, illustrates how lips indicate the sounds of various words. Buffalo is one of the centers of lip reading education with a League for the Hard of Hearing often conducting contests in the art which is available there both in public and private schools. Buffalo Times Photo 52 discouraged, because it is a handicap in learning English (or French, or German, or whatever the native language is), but it is an easier means of communication than speech and lip reading, and consequently many of the deaf prefer to use it among themselves. It took a long time for the work begun by these pioneers to spread to other parts of the. world, but a permanent school in the United States was established in 1817. It was called “The American Asylum for the Deaf and Dumb,” the idea being that the one institution would be adequate to care for all of the deaf in the country. The name of its founder, Thomas Hopkins Gallaudet, appears in mosaics: on the walls of the Library of Congress among other pioneers in American education, and the only college for the deaf in the world, Gallaudet College, Washington, D. C., does him honor. It took his school nearly a hundred years to get rid of the objectionable words “aslyum” and “dumb,” and the former still clings to the original site, Asylum Avenue, Hartford, Conn. We have had a little more than one hundred years in which to attain our present stage of development. The realization that more schools would be needed, soon became apparent, and others were established in rapid succession. At first, the children were all

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á d * co! 8 taught by means of the sign language and finger spelling. Those who had had speech before the loss of hearing sometimes retained it in part, but they received no training in its use, and it was thought quite impossible for those born deaf to learn to speak at all. This state of affairs continued until after the War Between the States, when some very prominent individuals began to play parts in changing the picture. One was Mrs. Henry Lippitt, wife of the Governor of Rhode Island; another was Mrs. Gardiner Greene Hubbard, whose husband founded the National Geo- graphic Society. Both of these ladies had little girls who were totally deafened by scarlet fever at the age of four or five. Both made up their minds that their children should not be deprived of the speech that was their rightful heritage. All prophecies to the contrary notwithstanding, they succeeded in retaining the speech of their little daughters, and in teaching them to understand others by lip reading, which is watching the movements of the face in speech. An obscure, indomitable little teacher, Harriet Rogers, also was thrust into a conspicuous place when the pupils she had taught speech and lip reading were called to demonstrate her success to the Massa- chusetts Legislature, so that a charter might be granted for the establishment of a school to teach the deaf speech instead of signs. Speech teaching received its real impetus sume Though his hearing is impaired, Frank Becket. investment banker. is an accomplished pianist and composer. He is shown at work on one of his own compositions, listening to it elec- trically through the bones of his bead. Qn the piano stands a microphone con- nected to the tiny electrical receiver worn just behind the ear, | Special equipment for the hard of hearing as installed in the Ghurch of ‘the Covenant, Boston, Mass., is shown at the right. Similar devices are being placed in talking picture theaters.

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Pioneers in the field of instruction for the deaf were muel Heinicke, German teacher, above, and Abbe de l'Epee, French priest shown in circle. Heinicke first taught lip reading. De l'Epee invented a system of signs with which the deaf could express ideas. His system was the forerunner of the one used by many adult deaf today. with the advent of Alexander Graham Bell. Cultured, dignified, enthusiastic, picturesque, - the son and grandson of experts in speech- teaching, he acquired early in life an interest in the deaf that amounted to a passion for improving their condition. As long as he lived he replied, when asked his occupation, “T am a teacher of the deaf.” His celebrity as the inventor of the telephone and his posses- sion of financial means helped him to arouse much interest in the cause he upheld, and his friendliness and dynamic leadership enabled him to set in motion forces which were to result in great changes for all those handi- capped by absent or deficient hearing. His chief interest was in having the deaf taught speech. He taught them himself, with remarkable success. He gave courses in speech-teaching to their teachers. He lectured and demonstrated in their behalf. Finally, finding himself unable to cope with the immense flood of letters that brought him inquiries of every nature dealing with deaf- ness, he founded and modestly endowed the Volta Bureau "for the increase and diffusion of knowledge relating to the deaf.” Later he gave the bureau to an organization which he had founded subsequently, The American Association to Promote the Teaching of Speech to the Deaf. Its service as an infor- mation center has become not only nation- wide but world-wide, and it is still housed in the building he erected for it in Washing- 54 Before modern times, the lot of a deaf person was likely to be tragic. Deaf children grew up speech- less and often were sub- jected to barbaric medi- cal treatment. This en- graving by Lucas van Leyden from the Bettman collection shows an op- eration behind the ear as performed in the year 1524. ton, D. C. Its reference library on deafness is probably the most complete in the world, and its magazine, the Volta Review, is the only one in American that deals not only with the education of those deaf from childhood but also with the everyday problems of those who lose their hearing in adult life. Two other very well known names are connected with the Volta Bureau's history. Sinclair Lewis was employed there at one Modern Mechanix

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time, as assistant editor of the Volta Review; and Mrs. Calvin Coolidge was a member of the Board of Directors while her husband was vice president of the United States. Mrs. Coolidge, by the way, is stil actively interested in the education of the deaf, being president of the Board of Corporators of the school where she once served as teacher—the school for which Harriet B. Rogers fought in her demonstrations before the Massachusetts Legislature—Clarke School, Northampton, Mass. Deafness still brings heartbreak and handi- cap wherever it attacks, but it is far from being the affliction it was a century ago. A short time ago I paid a series of visits to schools for the deaf. This is what I saw in one of them. A class of children about ten or eleven years old, gathered around a table on which were placed the outlets for a group hearing aid. The children had come to school five or six years previously, in just the same condition as the pupils who came to the abbe de l'Epee. Not one of them had had any speech. At first they had been taught speech through the senses of sight and touch, and had learned to read the lips of their teachers and fellow students. Hearing tests had [Continued on page 154] James Hutton, an 18th century physician, is pic- tured with his ear trumpet. Miss Sophia Alcorn is pic- tured at the right giving lip reading instruction to a class at the Detroit Day School for the Deaf. Most large cities: have similar instruction, May, 1937 Alexander Graham Bell, inventor of the telephone, was a teacher of the deaf. Intetested all of his life in teaching them speech, he founded the Volta Bureau, shown below, in Washington, D. C., and also organ- ized the American As- sociation to Promote the Teaching of Speech to the Deaf. The Volta Bureau takes its name from Count Alessandro Volta, the Italian physicist. 5

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, Along The Air Trails This unusual looking airplane was con- structed by Charles De Rouge, of Paris, France. Powered by a rear- mounted 30 h. p. en- gine and propeller, the Pe aircraft’s design per. | ^ ——— mits vertical landings. |. Revolutionary in design, the propeller of this air- plane has one blade and a countetweight. Invented by W. W. Everts, of Balti- more, Md. (left), shown with Frank Ellington, a friend, the novel propeller is said to increase airplane performance 25 per cent, Mrs. S. Davidson, of London, England (right), claims the distinction of being the only woman air liner pilot. Below---Ellen Roberts, 22, a Pennsyl- vania State College student, starts the plane in which she qualified for a license. A Purdue University stu- dent, H. F. Dostal, Jr. (above), set a record by soloing an airplane after 21/4 hours of instruction. Gliding activities have increased throughout the U. S. Lucretia Buxton, a California pilot, tries a two-seater soarer. 56 Modern Mechanix

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Upside-Down Movie Boat Serves As Roadside Cafe OCATED on the seashore near Point Magu, approximately 40 miles north of Santa Monica, Calif., on the Roosevelt Highway, is this unusual roadside cafe. Known as “David Copperfield’s Boat,” it was built from a small ship constructed for and used during the film- ing of the motion picture “David Copperfield.” Appropriately, this upside-down-boat- cafe specializes in sea food. In season, fresh lobsters, caught at Anacapa, head the menu. Extra Wheel Aids Trailer A third wheel shown in model is designed to remove weight from towing car and to end rear spring and axle breakdown. Device eases riding by removing much swaying and bobbing. ESIGNED to remove the troubles from trailer travel, this third-wheel unit takes all weight off the towing car. Invented by August and Art Niemann, father and son auto mechanics of Milwaukee, the turntable unit is guaranteed to end spring and rear axle break- down of the tow car, hitching and unhitching troubles, difficulty of weight balance in the trailer, and many other bugaboos connected with ordinary two-wheel rolling homes. The rear wheel also makes for easier riding, eliminating bobbing and swaying. May, 1937 Constructed for and used during the filming of ‘David Copperfield,” this upside-down- a roadside cafe. Specializing in sea food, the owner has placed the boat near Point Magu, California, “Clipper” Bus Is Introduced N ultra-streamlined bus, “The Flexible Clipper,” powered by a 78-horsepower engine, and carrying 20 passengers, is being manufactured by a middle-western concern. Having air brakes and safety glass throughout, the bus provides its passengers with de luxe chairs with down pillows. A double row of seats is placed along the right side of the interior, and a single row along the left side. Also, provisions are made for the installation of five auxiliary seats. Interior side lights are of modernistic design with dome lights over the aisle. The safety glass windows are mounted in anti-rattle spring tension channels with heavy quick action crank type window regulators. Entrance to the bus is through a 67-inch door opening outward. An emergency exit for passengers is provided in the center panel on the left side. With a 182%4-inch wheel base, the bus measures 320 inches overall. “The Flexible Clipper," ultra-streamlined bus, carries 20 pas- sengers, and is powered by 78 h. p. engine. With safety glass throughout, de luxe chairs and down pillows are provided. 57 boat now serves as .

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They Call Her "The Lady Edison" A eftect the production, on egos portion of the g tho sone UNITED STATES PATENT OFFIC 2263455 WRITING MACHINE asieh Louie ffenry, New York. N, Y. Miss Beulah Louise Henry, leading woman inventor, received 43 patents during the past decade. —]Bachrach Photo Left—Copies of but few of the many patents granted to Miss Henry during her short invent- ing period. Inventions include high speed sew- ing machine, toys, radio dell and typewriting at- tachment. ISS BEULAH LOUISE HENRY, leading woman inventor, is known throughout the world because of her numerous inven- tions as "The Lady Edison." Within the past decade Miss Henry has patented 43 inven- tions, covering all sorts of new things, rang- ing from a radio doll, office equipment, .gadgets for the needs of women, on through sewing machines. In Europe as well as in the = United States Miss Henry is recognized and loved. An exhibition of her work is per- manently on display in the museum at Osaka, Japan, where it serves as an inspiration to Japanese women. i Miss Henry comes from illustrious ances- tors. On her father’s side she is a lineal descendent of Patrick Henry. On her mother's side Miss Henry is the descendent of President Harrison, and granddaughter of former Governor Holden, of North Carolina. She was born in Raleigh, North Carolina, and was educated in that state. She has been a [Continued on page 147] ER ANE NC April 58 Modern Mechanix

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Highway Striper Paints 25 Miles Of Road A Day WENTY-FIVE miles of white highway stripes may be painted in a day with the new device developed by the Equipment Department of the California Division of Highways. Propelled by a truck carrying a special lacquer paint and an air compressor for cleaning the pavement surface in advance of striping, the new unit does five times the work a corresponding number of men could do with the older equipment. Some of the units have been equipped with a small pump which retrieves excess lacquer. . New Hood Protects Operator A special protective hood which has no eye covering, uses the opening as a place for used and excess air to leave, thus pre- venting outside air from entering hood or approaching eyes. HIS new type hood respirator covers fully the head and neck of the operator and provides complete protection where venti- lation is inadequate or where materials are present in the air which might prove harmful to eyes, ears or respiratory organs. A fresh supply of air constantly is fed into the hood and flows out through the opening provided for vision, thereby preventing out- side atmosphere from approaching the eyes or entering the hood. The unit is composed of a lightweight headgear, air filter and air hose which is connected to the air line by a special quick detachable connection. May, 1937 With this new equipment a crew of workers capable of paint- ing five miles of highway in a day, now does 25 miles in the same time. The machine shown is being propelled by truck. Auto Becomes Power Mower HOMEMADE power mower, using a Chevrolet chassis and a rubber tired mowing machine, was constructed by William Neidner, owner of Rosewalled Farms, Hills- boro, N.H. The car differential is shown just in front of the gas tank at the rear of the car. The ends of the differential axle are fitted with small sprockets which in turn are connected to larger sprockets attached to the outside of the mowing apparatus tires. Having a short wheelbase, the machine is easily controlled. Because it operates in high gear most of the time, it is said to be very economical. At Rosewalled Farms all work is done either by electric or gasoline power. Mr. Niedner has purchased several old farms and has been developing them by use of modern machinery. Roses have been planted on stone walls, thus giving the farm its name. A Chevrolet chassis was converted into the power mower by William Neidner, owner of Rosewalled Farms, Hillsboro, N. H. Because it travels mostly in high gear it is very economical. 59

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Brothers Build Plane Powered By Hybrid Engine Using parts from several auto engines and radio sets, Joseph and Howard Funk, glider pilots of Akron, Ohio, constructed the high wing monoplane shown in upper photo. Compact Velometer Devised TUBE-TYPE velometer that indicates X air velocities directly on a scale without the necessity of timing or any mathematical calculations has been developed by experts of a Chicago testing laboratory, Compact in size, the meter can be used to take readings in places inaccessible to other means. The mechanism is housed in a black molded plastic case, 544x534x23%% inches in size and weighs approximately two pounds. In opera- tion, the tube is held at the point where air velocity is to be tested and the air entering - the meter actuates a vane to which a pointer is attached. A graduated scale on the face of the meter gives the velocity reading as indi- cated by the swinging pointer. The velometer is claimed to be-ac- curate to within three per cent of This tube-type velometer meas. itS fullscale read- ures the velocity of the air ings streams in which tube is placed. : 60 OWERED by an engine con- sisting of parts from several autos and designed primarily for reliability and low construction cost, a two-passenger monoplane has been developed by Joseph and Howard Funk, of Akron, Ohio. Engineering experts are said to have been favorably impressed with the stability and performance of the plane. The aircraft is of the high wing braced type. Fuselage, landing gear, and tail units are con- structed of seamless steel tubing, but the wings have wooden spars and ribs. Fabric covering is used on the wing and control surfaces. The brothers built the plane in one year during their spare time. Pie Pans Make Drying Reel To keep his fly casting lines in good condition, F. L. Mo., constructed this novel reel Reel exposes more line for drying. Scott, of St. Louis, from two pie pans. ONSISTING of two pie pans separated by a wooden spool, a novel handle-operated reel for drying fly casting lines has been de- vised by F. L. Scott, of St. Louis, Mo., an ardent fisherman. The reel enables more of the casting line's surface to be exposed to the air, thus insuring quicker and more thorough drying of the line. Modern Mechanix

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LARGEST U.S. AIRLINER ORDERED The largest passenger plane in the United States, powered by four 1,205-horsepower engines, has been ordered, and is ex- pected to be placed in service next spring. Carrying 32 passengers, the monster ship-will be capable of 250-mile-an-hour speed at 20,000-foot altitudes. ONSTRUCTION work on what will be the largest airplane to go into service in the United States, has been started for Transcontinental and Western Air, Inc. Six of the new ships will be built at a cost, including spare equipment, of $2,043,000, and an option on 17 additional planes of the same type has been taken. The transports will be equipped with berths for 18 persons and seats for eight when flown on night schedule and with 32 seats when operated as day planes. In addition, cargo space for 3,750 pounds is provided. The passenger cabins of the new planes are structurally designed and built for super- charging. When cabin pressure equipment is added, TWA expects to fly the planes at 20,000-foot levels. At the higher cruising levels the new ships will fly at about 250 miles an hour. Simultaneous with the announcement of the purchase of the new planes, Jack Frye, president of TWA, announced that TWA has ordered 36 additional Wright G-100 heavy duty Cyclone engines to power the ships. Capable of producing 1,205 horse-power, the new Cyclones are the most powerful air- May, 1937 Cabins are designed for supercharging for high altitude flying. Ship weighs 42,000 pounds. cooled radial engines in production in the country. These engines are the same as’ those now being installed in TW A's Douglas airplanes now nearing completion in Cali- fornia. Installation. of four of the Wright G-100 Cyclones in the new TWA Boeing plane will give the ship a total of 4,820 horse- power. In all, the 77 Cyclones now on order for TWA wil be capable of producing 92,785 horsepower. In the announcement of TWA's order, Mr. Frye stated: "The purchase of these planes which will be the first of the modern four-engined trans- ports to go into service in this country, is a step in the general expansion program being undertaken by TWA. “In all, approximately $4,300,000 is being spent by the Company. The new Boeing fleet, together with spares and equipment, will cost approximately $2,043,000. Other funds are being expended for other two-engined equip- ment, for research and development and for improvement of ground facilities." Concerning the new Boeings, Mr. Frye said: [Continued on page 150] 61

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Success of a fishing trip de- pends as much on accessories 3s the scene and the fish. Care in planning brings rewards. Hook and sinker kits keep the ` üsherman's weapons in order. At right is a leather rod case. 62 | SPORTSMEN S RITERS on fishing invariably de- vote themselves in their essays to voluminous accounts regarding tackle habits of the trout, and this, that or the other. When, however, it comes to writing with regard to the clothing and like necessities to use, they pass the subject by merely as an afterthought. Obviously the success of any trip depends upon the physical well being, proper bodily protection and an ability to master the elements. Instead of being shoved to the back of a book it should occupy first place. That there are colds and all manner of ailments contracted annually on trout fish- ing and other trips is rather proof that less consideration is given clothing and like par- ticulars than any connected with the pastime. How much better it is to go well equipped to take care of your health and at the same time be able to wade successfully any portion of a river or stream that is reasonably nego- tiable. Unlike in other departments of the pisca- torial game, trout fishing calls for the use of either hip boots or so-called wading trousers, the same being picked according to the stream that you are to fish. Gener- ally most streams are only compara- tively deep and may be waded using hip boots. Others are a different proposi- Waterproof clothing some- times means the difference between a thrill and a chill for the spring fisherman.

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CAMPFIRE — tion altogether, presenting fairly deep water that would go over the tops of hip boots. In such streams the wading trousers that come up to under the waist are most desirable, in fact are almost a necessity if one is to get the most out of a wading stream. The fisherman who has come upon a stream of the sort using hip boots only to find that time and again it has been impos- sible to wade across to a certain point; to reach a mid-stream location, or otherwise has found himself halted by reason of boots that would or could not "take" it, knows eventually just how invaluable wading trousers are in a case of the sort. This is not to say that even wading trousers are equal to each and every situation, but it is certain that two-thirds of the streams that cannot be fished when using hip boots will be successfully circumvented by the use of wading trousers. Wading trousers come in two types, the heavier one with the built-in shoe and the so-called feather-weight or light-weight waders (trousers) which have no built-in shoe on which are worn leather wading shoes or brogues that slip on over the so-called “stockinged” feet of the waders. While there are good points scored for each type of these wading trousers, it can surely be said that the light-weight trousers are the best, where lightness, ease of wearing and transportation are concerned. These light-weight trousers, in the wading class, ean be rolled up and tucked away in a packsack to take up but little room. The heavier type, with built-in shoes, are not so easily carried, and are by far more clumsy. On the other hand the heavier trousers with |. built-in shoes’ are more sub- stantial and por longer. Two Sheepskin hatbands like the one at the left ate a helpful accessory for the fly fisherman. The fly lures are hooked into the band for instant selection. years is just about the life of a light-weight wading trousers, that is, if used a great deal. Brogues or shoes used for wading are gen- erally fitted out with heavy soles. If not to be had as the shoes come, a shoemaker can apply these with ease, making them upwards of an inch thick. The bottom of these are set with hobnails, so arranged that they will best grip the rocks on the bottom of the stream. Hobnails, while useful, are not entirely successful in that they will wear 63

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The drawing shows special construction for boot soles to prevent slipping on dan- gerous rocky stream beds. Light weight ankle boots which terminate be- low the knee and allow much freedom are popular with many fishermen who like to wade trout streams. down. Even better than the hobnails are three-quarter-inch long wood screws, with sharp edges that are turned in to stand out a quarter of an inch and so arranged over the area of the sole.as to make for a good grip on the rocks. 'These screws should not be so close together that they do not form contact with the slimy cobbles, otherwise the purpose of the idea is quite lost. The sharp edges of the screws cut into the slippery rocks and hold, where the rounded hobnails are likely to slip. If these screws are set in old or worn leather they are likely to be but poorly held in place and are apt to tip over under rough impact. They should be set in new leather soles, which same, being tough and hard, will hold them secure in their up and down posi- tion and will not turn when pressure is made against the rocks. Where wading shoes or brogues are used outside of wading stockings or the feather- weight trousers mentioned, there is need of protection for the wading stocking that covers the foot. Therefore, it is necessary to pull on two pairs of wool socks over the stocking after which it is inserted in the wading shoe. This forms a protection be- tween the stocking and the shoe that will prevent wear. Inside of the stocking another two pairs of socks are used, thus involving the use of four pairs of socks. While this will seem a lot of socks, it should be remembered the trout water, whether in the summer or spring is likely to be ice-cold. With the suffi- cient number of socks stated one will find himself comfortable at all times, and will stand not the slightest chance of incurring a cold. It should be remembered that a clammy foot in a pair of hip-boots will be likely to 64 3/4" SCREWS}: Here is a, well. equipped fisherman in action. Note creel harness and boots. Creels with shoulder harness like the one shown at left permit complete arm freedom while casting line. invite a cold as well as walking barefooted -jin the water. This is something that is rarely given any attention. Since many colds come from the feet, the protection that must neces- sarily be accorded them should be as com- plete as possible. Wading trousers (or wading stockings as they are also called), have need of strong suspenders to hold them up. They are but fairly tight to the body. Some years ago there was considerable propaganda put out against these wading trousers, the statement being made that they were dangerous. If the fisherman got out into mid-stream and was swept off of his feet, or got into a deep hole, these trousers would fill up with water, and would then pull the fisherman down, re- sulting in death by drowning. So few, if any, have these drownings been that they are to Modern Mechanix

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be dismissed without second thought. The 'chances of drowning in a pair of wading trousers on 90 per cent of our American trout streams is extremely narrow. Undoubtedly, in fishing a real swift stream, in which one has difficulty in standing on one’s feet, there would be some risk, but the same risk would be incurred fishing with hip boots or even when fishing in the “soaking wet” style, where no boots are used, just the hobbed shoes. The fact remains that the wading trousers are well nigh invaluable, and assures one the opportunity of fishing places in streams that otherwise cannot be got at. While these waders cost considerably more than the hip boots they are well worth the added difference. Hip boots accompany about 75 per cent of ee Lots of pockets in this special waterproof fish- erman’s wading coat provide room for tackle. the trout fishermen on their annual trips, re- gardless whether they permit one the oppor- tunity of covering all stretches of water or not. The oldtime boot used in trout fishing was little short of a trial when worn. Many of these were in the heavy, ditching boot type. They were hard to wear and invariably wore blisters on the heels, toes and sides of the feet, which were caused by the boot foot being too stiff to bend with the foot. In other words the foot would bend but the boot would not, thus forming a wear of the boot against the foot. Present-day hip boots are now made in a light-weight material, so soft and merging with the movements of the foot as to surprise one. ‘Such boots are extremely easy on the foot, and, worn with a pair of wool socks, possess everything that is needed in wading efficiency. They are so light and are made of such featherweight material that they may be rolled up in a small bundle to take up but little space. New in- novations in these rubber boots of the hip May, 1937 This Yale hat and similar types protect the head of the fisherman from the weather and are also pop- ular for any other kind of outdoor activity, This lightweight waterproof vest is designed to protect the sportsman without impeding his movements. The sportsman at the right is wearing a burr-proof and mosquito-proof buff ,hersehide garment and carrying one of many folding kits on the market that serve well to carry lures, hooks, line, etc. variety involve buckles that connect over the instep of the foot, this holding the boot in place on the foot. If pulling the boot out of the mud, it will come up without being left in the same. Fishermen who have had mis- fortunes of the sort will appreciate the value of this inventive item. Newer type rubber boots have various non- slip features, the chief invention in this line being a rubber boot with a sole to which you may affix hobnails. This is no less than a stroke of invention wrapped up in one pack- age. Corrugated and cleated soles are in- teresting additions to boots, also ankle-fit features that make such boots more com- fortable on the foot. Other recent additions to the line of boots that are useful not only for the trout fisherman but all fishermen as well, are the so-called ankle boots that reach up some 16 inches or so on the leg. These have no tops like in the hip boots. They ter- minate below the knees. They are light in weight and incorporate ali the features de- manded in a short boot. They are used in fishing along brushed-in streams, through [Continued on page 116] 65

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Spectacles Pierce Fog And Haze Arnhym has in. vented special spectacles which will reveal enemy áirplanes con- cealed by clouds. darkness, etc., or help motorists to safely travel fog blanketed roads. Sketch shows con- struction details. Albere A. Arnhym (above), young scientist of Chicago, Ill., has patented an invention for converting invisible infra-red and ultra-violet rays into visible rays. Arnhym was the first. scientist to transmit colored pictures by television. ORN like ordinary eye glasses, special spectacles designed for converting in- visible infra-red and ultra-violet rays into visible rays have been invented by Albert A. Arnhym, a Chicago, Ill, scientist. Since infra-red rays penetrate fog and ultra-violet rays pierce darkness, persons wearing the spectacles can see objects hidden by these barriers. The spectacles have many practical uses. In war time they would reveal enemy planes hidden in clouds. In peace time, motorists and ship captains will be able to steer safely through fog and haze. A military adaptation of the young scientist's invention, enabling messages to be sent over a radio-light phone, will be tested by the Illinois National Guard this summer. Message rays sent by the Arnhym system, it is cleimed, can only be received by the unit to which they are directed, thus insuring secrecy. Using a radio-light phone adap- tion of Arnhym's invention, army field communications can be directed so only units for which the information is in- tended can receive the ray. 66 Modern Mechanix

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Powerful X-ray Machine To Aid Cancer Research HE most powerful X-ray machine in the U. S. has been installed at the Cancer Re- search Institute of Columbia University in the Presbyterian Hospital at Medical Center, New York City. Capable of developing 1,250,000 volts, the apparatus produces radiation equal to 100-million dollars’ worth of radium. Completed after two years work by Frank Exner, famous physicist, the X-ray unit will be used for research work and treatment of cancer patients. Five patients can be treated simultaneously. The tubes in the new machine are made of steel instead of glass. High voltage generating units contained within the tubes are grounded to prevent danger of shocking patients. Axle Eliminates Strains Easily attached to a steel or wooden trailer chassis, a new drop axle (upper photo) eliminates strain of torque, crank. ing and whipping. Lower photo shows method of attachment. EADILY adaptable to a steel or wood trailer chassis, a new drop axle designed to eliminate the strains of torque, cranking, and whipping has been developed by a Wausau, Wis., tool manufacturer. The axle acts simply as a spacing bar be- tween the wheels and carries little of the weight of the trailer, a Hotchkiss drive through the spring and spring saddle serving to relieve the axle of the usual strains in- curred while the trailer is in motion. May, 1937 Five cancer patients can be treated simultaneously by this X-ray machine installed at Medical Center in N. Y. City. De- veloped by Frank Exner, physicist, the machine produces radi- ations equal to that of 100-million dollars worth of radium. Sign Spells Its Message N ELECTRIC sign that spells its message leisurely or rapidly, by letters or groups, and at any desired rate of speed to obtain re- quired emphasis has been developed by a Trenton, N. J., manufacturer. The sign con- sists of as many individual electric boxes as there are letters in the message to be flashed. The boxes are simply pushed together by means of plugs, becoming electrically and mechanically connected to form a solid row. An electric bulb in each box is turned on by a self-contained timing device which is adjust- able to any desired time lag. A shorting switch in each box eliminates the timing device if several boxes are to be flashed as a group. Boxes are available in several colors. Featuring self-contained timing mechanisms, these electric sign letters can be regulated to flash slowly or rapidly. in unison or individually. Plugs form contact-connection. 67

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‘IFS’ of the GREAT Reet LH RH EG S ii ai Pa ans eol EC Gast eit FT canunt lh E E Í ic = i TN ens ici À qa ECRIRE vm Dite ftt tens ae MESE PEU USER Torri n ER * TS ILE E1533 9 0 9 Mob Hn Greatest ship of her day, the Titanic sailed westward 25 years ago this spring into circumstances rivaling Greek tragedy in catastrophic portent. A vessel of 46,328 tons and 882 feet in length she would be one of the biggest ships even today. There were accommodations aboard for 2,650 passengers and a crew of 892. | by Karl Baarslag Author of "SOS to the Rescue" LTHOUGH 25 years have passed, bring- ing with them many other sea disasters, the foundering of the White Star liner Titanic remains to this day the worst marine catastrophe of all time, measured in lives lost. On a spring night, April 15, 1912, 1,517 men, women and children perished in the icy waters over the Grand Banks of the North Atlantic. The material loss was more than $12,000,000. The world's newest, largest and most lux- urious “unsinkable” ship went down on her maiden passage in two hours and forty minutes. Lost with her, on board and over- board, were a long list of prominent figures in the arts, in public life and in the business world. Her commander, E. J. Smith, Com- modore of the line, went down with his ship, as did 77 per cent of her crew. The world was stunned following the news. Business virtually ceased on the New York Stock Exchange. Consternation ruled at Lloyd's, who had insured the vessel at one of 68 the lowest rates ever given because of her supposed “unsinkability.” Buildings in London, New York, and elsewhere half- staffed their flags. The sinking aroused sen- sational rumors, wild charges, and acrimonious controversy. It was made the subject of two inquiries, first by the United States Senate, the other by the British Board of Trade, under presidency of Lord Mersey. The poignancy of the Titanic disaster lies in the extraordinary tragic concatenation of circumstances, which, taken separately, would not have resulted in disaster but which, linked together in relentless succession, made the catastrophe inevitable. In no Greek tragedy can one find such an inexorable and fatal chain of calamitous circumstances. Here was no General Slocum fire and a panic, of helpless women and children; no sudden sink- ing of a torpedoed Lusitania or badly holed Empress of Ireland; no helpless and leaking Vestris foundering after a severe storm. Just the glancing scratch of an iceberg—and a small berg at that!—on a starlit, calm, clear night. After the two inquiries, the full tragic chain of "ifs" and “might-have-beens” stood re- Modern Mechanix ed : iig geng

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“TITANIC” TRAGEDY vealed in terrible clearness. If the look- out men had sighted the berg a few seconds earlier the collision would have been averted entirely. Had the berg been sighted a few seconds later, the crash would have occurred more nearly head-on with probably a small loss of life, but with no danger of sinking. The ill-fated liner turned from her course just exactly far enough to receive a glancing, 300-foot long slash, on her starboard side immediately below the waterline. If the Titanic had been built with an inner skin such as the Mauretania or other ships had, or, as is the usual prac- tice, with wing bunkers along the side, the wound might have not been fatal. Even with no inner skin and with boiler rooms right across the ship, she could have floated if her bulkhead deck had been watertight, or, as Lord Mersey concluded, “If the transverse bulkhead abaft of No. 4 boiler room had been carried up to D deck, the ship would have remained afloat.” Subsequent dis- closures proved that this was the Titanic’s Achilles heel. All the other May, 1937 From 25 years of study, a radio operator analyzes chain of events which swept an "unsinkable" ship to coom amid ice of North Atlantic. watertight bulkheads were carried up one deck higher but for some inexplicable reason this bulkhead stopped at E deck. But, even with the forward bulkheads carrying a very low margin of safety, that is, up to E deck or only 11 feet above the water line in smooth water, she still sank slowly enough to permit all her passengers and crew to leave in ample time—if, and this is an incredibly tragic "if"— if there had been enough boats and rafts for those she carried. Certified to carry 3,547 persons, she had boats for only 1,178, and even this meagre figure was nearly double that required by the antiquated Board of Trade law of 1894, which had not been revised in 18 years. Therein lay the ironie tragedy of the Titanic. Perfect weather and ample time for launching boats, such as few sinking ships have ever been John George Phillips, chief radio operator of the Titanic, went down with his ship and the principal credit for the saving of the 712 persons rescued. "There are monuments to him in both England and the United States. 60

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di The Carpathia, above, sped 58 miles through the icy night to pick up the boats of the Titanic. Howard Cottam, sole Carpathia radio operator, heard the ego message just as he was unlacing his shoes in prepara- : tion for bed. fortunate enough to have—but there were not enough boats. There were two other “ifs” in this almost impossible tragedy, strangely fateful “ifs” and both concerned another vessel, and were therefore purely fortuitous, but contributed nevertheless to the magnitude of the disaster. One, the inaction of the master of the SS. Californian, and the other the terribly tragic story of the Californian’s single radio opera- tor. Had he remained on watch but 15 minutes longer, he would have heard the Titanic’s first SOS; she was less than 15 miles away, and everyone might easily have been saved. Cyril Furmstone Evans, the Californian’s lone operator, had been on watch since 7 a. m. and even a $20-a-month radio man is entitled to some rest. No reproach whatsoever at- taches to him, but the tragedy, with its appall- ing loss of life, exposed to the public the wretched penuriousness of some steamship companies, so justly and forcibly condemned by Senator Smith, Lord Mersey, Marconi, the newspapers, and many others. New and stringent legislation was universally de- manded, but, as Admiral Mahan so aptly stated, “Corporate responsibility is notorious- ly fugacious and elusive.” The same spirit of misplaced economy today finds its loop- holes through which to evade adequate radio protection. The Titanic, the world’s largest and newest deluxe passenger liner, was launched at Bel- fast, May 11, 1911. She completed her trial trip April 1, 1912, and two days later arrived 70 at Southampton. Many prominent Americans deferred their departure from Europe so as to be able to sail on the new ship. The ill-starred liner sailed for New York on Wednesday, April 10, stopping at Cherbourg and Queens- town. She would dock at New York the following Tuesday or Wednesday. Her New York pier was gaily decorated. With her 46,328 tons and 882 feet length, she would have been even today among the world’s largest liners. Officers and crew numbered 892 and she had sumptuous aecom- modations for 2,650 passengers. However, she sailed with only 1,316. As Joseph Conrad satirically pointed out, she had every “banal hotel luxury,” a French restaurant, Turkish and electric baths, swimming pool, veranda cafe, palm court, squash racket court and numerous other luxuries, but boat accom- modations for only 53 per cent of the people on board. The Titanic was the “last word” in naval architecture. Designed by Lord Pirrie and built by England’s best known and oldest shipbuilders, Harland and Wolff, she em- bodied all the latest developments as to strength, safety, and modernity. Fifteen transverse bulkheads, their watertight doors electrically controlled, divided her into 16 watertight compartments, so proportioned that any two of the largest could be flooded without affecting her floating power. Keel, keelson, longitudinals, inner and outer bottoms were of a size, weight and thickness exceeding those of any other ship ever built. An elaborate system of pumps and piping Modern Mechanix

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could discharge an enormous influx of water. Her master was E. J. Smith, with 38 years of service, unmarred by a single serious acci- dent. Except for a minor scraping, he had never been in an accident; had never seen one in fact. Such was their confidence in their new ship that the line offices in New York refused to believe her sunk for two days after the disaster. Questioning relatives were turned away with the assurance that it was "impossible" for her to sink. The passage was uneventful and pleasant from the time Ireland was dropped astern to the fatal Sunday, April 14. On Saturday and throughout Sunday ice warnings began to come in by wireless. It was subsequently proved at the British inquiry that at least three.of these were acknowledged with thanks by Captain Smith. Besides the radio warn- ings and the fact that at this time of the year ice could be expected in the region which they were approaching, a falling thermometer added a third ominous warning. It became intensely cold. The Titanic, in her pride, sped westward; west- ward to her doom at 21% knots. At noon her run was posted at 526 miles. Even better was promised for the next day. | In the wireless cabin John George Phillips, the chief, and Harold Bride, the junior operator, were kept busy with their traffic. That Sunday the installation had broken down and Phillips had spent over six hours re- pairing a burned out and grounded transformer secondary. To his skill and persistence the 712 rescued prob- ably owed their lives. Had he been unable to effect repairs, or had he deferred doing so, the disaster might have been much greater. At 9:00 a. m., Sunday, the Caronia sent an ice message to the Titanic which Smith acknowledged 40 minutes later. It placed ice within five miles of the Titanic’s course. Later that morning the Baltic also sent a message placing ice ahead of the new liner and wishing Smith and ' his ship "all success.” This too was acknowledged. During the day the Titanic relayed to Washington an ice message from the German SS Amerika and later that evening the Mesaba informed the Titanic of the dariger of ice ahead. From these and other warnings the Titanic’s naviga- May, 1937 tors plotted a rectangular field of ice some 70 miles long and 12 miles wide lying broad across their course. Still the great liner raced : on at ever increasing speed—22, 23, 244% knots per hour. The picture of the Titanic, ablaze with light, thronged by happy passengers, racing along through the night to her doom in the last few hours of her life, will remain forever one of the most gripping and dramatic memories of the sea. Ü The maintaining of course and speed in the face of numerous ice warnings became the crux around which both investigations cen- tered. At the British inquiry, a number of vet- eran North Atlantic shipmasters, all ice expe- rienced, unanimously swore that it had been their invariable and universal practice to maintain course and speed as long as the visibility was good. Schedules must be main- tained and passengers are always in a hurry to reach land. One cannot go slow, or change course, merely because there is ice some- Capt. Arthur Rostron of the Carpathia, His preparations for the Titanic sur- vivors were described as a miracle of foresight. He later commanded the Mauretania and the Berengaria and was accorded countless honors.

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where ahead. Lord Mersey summed up the situation by saying, “Smith made a. mistake, a very grievous mistake, but one in which, in the face of practice and of past experience, negligence cannot be said to have any part; and in the absence of negligence, it is, in my opinion, impossible to fix Captain Smith with blame.” He added “the hope that the last had been heard of this practice and that for the future it would be abandoned. What was a mistake in the case of the Titanic, would with- out doubt be negligence in any similar case in the future." The Titanic in her pride raced to her ren- dezvous with the pale death born of Green- land's glaciers. Between 6:30 and 9:00 that evening, the temperature dropped noticeably — rom 43 to 32 degrees. The navigators very calmly figured “they would be up to the ice by 11:00 p. m." It does not appear to have been a matter of great concern to anyone. Captain Smith came on the bridge briefly about 9:00 p. m. and discussed with the officer on watch the weather—then “a flat calm"— and also the ice warnings. He left instruc- tions to call him immediately if it became “at al doubtful" referring to the visibility. It ado Nis was a wonderful night, unusually clear, star- lit, and fine. 3 At 10:21 p. m. ship’s time, the Leyland liner, Californian was stopped by field ice not over 20 miles from where the Titanic later went down. Evans, the radio operator, tried to inform Phillips of the fact about 11:00 p. m. but Phillips was busy “copying” messages from Cape Race, and Evans, being so much nearer and having a broad spark note, naturally interfered. Evans received a curt, Harold Bride, junior operator on the Titanic, who was relieving Phillips as the first dis- tress message was sent. He survived the tragedy on a raft but suffered frozen feet. Mute reminders of tragedy, the Titanic lifeboats were brought to New York by the Cerpothic. Thousands viewed them. Modern Mechanix

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“Shut up, I am busy with Cape Race," from Phillips. Phillips in- formed Cape Race that he had just been “jammed” by the Californian and to resume traffic after the last message which he had received "ok." Evans continued to listen for a few minutes to the stream of Messages passing from Cape Race to the big liner; it was nearly mid- night, and he had been on watch since seven that morning, 16 hours; his ship was stopped by ice; there was nothing else for him to do and no reason why he should stay up any longer. Entirely oblivious of the por- tentous possibilities of his auite natural action, Evans took off his phones, switched off his receiver, and went to bed. Had he kept them on 10 or 15 minutes longer. he would have heard signals far more arresting than the dull ex- change of routine traffic from coast station to ship, the dread CQD and SOS of a ship in distress, and, with his ship, he would have shared in the enviable distinction of saving 2,200 lives and preventing the world’s greatest marine catastrophe. Surely the Fates were more than unkind to 20-year-old Cyril Furmstone Evans. It is easy to be wise after the event. No blame or reproach attaches to Evans. Every other operator, the writer included, would probably have done the same. Even radio operators must sleep. By law, deck and engineer officers stand only four-hour watches, with eight hours of rest and a fresh man to relieve them at the expiration of each four-hour watch. Even the LaFollette eight-hour day for sea workers entirely overlooked the radioman. The lone operator when he closes down his receiver after a long day at the set never knows what may happen during his few hours of sleep; a ship may sink with loss of life within a few miles of him crying in vain for help into his unhearing apparatus. At 11:40 p. m. Fleet, one of the two lookout men of the Titanic, saw a dark object dead ahead and not far off. He struck three bells from his crow's nest perch, the warning signal of something ahead, and immediately phoned, "Iceberg right ahead!" Chief Officer Murdoch ordered the helm “hard-a-starboard” and reversed the engines. He also closed the watertight doors by throwing the necessary May, 1937 Among the radio operatots who copied the Titanic SOS 25 years ago was young David Sarnoff atop the Wanamaker Building in New York. He is now president of the Radio Corporation of America. electric switches. As the ship's head swung about two points to port, a slight scraping im- pact was felt. Captain Smith rushed on the bridge from his room and asked: "What was that?" *An iceberg, sir!" replied Murdoch. "Close the watertight doors!” was Smith's order. “Already closed, sir,” was the reply. Only 37 seconds elapsed from the time of sighting the berg to the instant of collision. The shock was so slight that passengers who were still up hardly noticed it. Four men playing cards got up when the ship stopped, went on deck, saw nothing, and returned to their game. Others wondered vaguely why the great ship had stopped. Unknown to those on board, the Titanic had been slashed on her starboard side like a ripe melon. In less than 10 seconds her plating had been ripped open for a distance of 300 feet under water and about 10 feet above the turn of the bilge, from her forepeak to the No. 5 boiler room. Water poured into the five forward compartments to a height of 14 feet in the first 10 minutes. 73

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Part of the crew of the Carpathia. e possible to make the Titanic survivors comfortable on the crowded voyage to New York. An officer testified later that he found the mail room, 24 feet above the waterline, awash 20 minutes after the collision. The flood exceeded the maximum capacity of the Titanic’s system of powerful pumps. With only three of the four forward compartments flooded, the ship could have lived, but the flooding of No. 6 boiler room sealed her doom . The bulkhead, referred to by Lord Mersey in his report, was the low bulkhead that went up only to E deck. Water poured over the top of it into No. 6, destroying the Titanic’s last slim margin of floating power. As the great liner settled lower and lower by the head, compartment after compartment was filled in turn and her life correspondingly shortened. Bride, the junior radio operator, was asleep and did not feel the shock of collision. He awoke a few minutes later, probably because the throb of the engines had ceased, and got up to relieve Phillips at midnight instead of the usual 2:00 a. m. because he remembered that his chief had been up all day on the repair work and that “he seerned tired.” Bride took over the phones and Phillips, who was pre- paring to retire, casually mentioned they must have struck something as the ship had stopped. Just at this moment Captain Smith came to the radio room and said: “We have struck an iceberg and I am hav- ing an inspection made to tell what it has done to us. You'd better get ready to send 74 These men turned over their quarters and their clothing and did everything out a call for assistance, but don't send it until I tell you.” He hurried back to the bridge. This was less than 10 minutes after the ship had stopped. Smith, despite the size of his ship and his confidence in her, was not unmindful of the value of radio and not hesitant to call for help. Bride said that he and Phillips looked at each other in amazement; so incredulous were they, and such, too, was their faith in the *un- sinkable ship" that they laughed and joked. about it for some time. Bride relates, “We said all sorts of funny things to each other." In less than 10 minutes Captain Smith was back in the doorway of the radio room. There was some sound of confusion coming from below, but no excitement in his voice or man- ner; however, he looked grave. "Send out the call for assistance!" he ordered. “Which call, Captain?" Phillips asked. “The regular international call for help,” was his reply; he hurried away. This time Phillips did not laugh; nor did he hesitate. On full power he rapped out CQD six times, followed by the Titanic’s call letters, MGY. j The liner was equipped with a rotary type of spark gap, now long extinct. Its crackling, musical whine leaped across the Atlantic’s cold and darkened waters. At Bride’s sug- Modern Mechanix

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gestion, he varied his distress calls with the SOS, which, although adopted internationally in 1908, had not completely displaced the older CQD in the British operator's affections. Captain Smith returned and joined them in laughing at Bride's quip that it might be Phillips’ “last chance ever to send another SOS." Grim prophecy spoken in jest! At this time Captain Smith must have still felt supreme faith in the invulnerability of his new ship. The German SS Frankfort, 153 miles to the southwestward, was the first to answer. Phillips gave him the Titanic's position and asked for assistance. While the Frankfort's operator took this to his captain, Howard Cottam, the operator of the SS Carpathia, asked Phillips, did he know that there was traffic for the Titanic at Cape Cod station? Cottam had not heard the distress call of MGY. He was startled to receive: “Come quick, we have struck a berg! CQD, old man!” That Cottam happened to be on watch was purely fortuitous. He remained at his post long after his time was up because he was interested in the English coal strike and wanted to hear Cape Cod's dispatches. Cape Cod also called the Titanic, and he thought that, in turn, he would inform the line of the fact. As sole operator, he too, would ordinarily have been in bed at this late hour. Captain (now Sir) Arthur Rostron, in his recent memoirs, Home from the Sea, says that Cottam was ready to switch off his receiver, and had in fact already started to unlace his shoes when the Titanic’s distress call came in. Cottam lost no time in informing Rostron, who had turned in but was not asleep. Rostron, too, was incredulous—the world's largest and newest liner, the "unsinkable" Titanic, in distress on her maiden voyage? Impossible! There must be a mistake. He sprang from his bunk and grabbed Cottam by the sleeve. “Are you sure it is the Titanic?” he asked. “Yes, sir.” Still it seemed utterly im- possible. “Are you absolutely certain?" Rostron asked again. Cottam stood his ground; he was sure. The second affirmative convinced Rostron. “All right, tell him we are coming along as fast as we can.” _ A quick comparison of positions disclosed that they were 58 miles apart. Rostron’s famous “North 52 West!” was given to the May, 1937 It's helmsman and the Carpathia was off on her historic dash! Every officer and man was roused out and assigned to duty; stokers off watch tumbled out and, without dressing, rushed to the firerooms to augment the black gang on watch. Preparations for the most remote contingency were made, not the small- est detail was overleoked. Boats were swung out and made ready to lower, lights and lad- ders were rigged, life lines rove along the side, blankets, life-rings, hot coffee, restoratives, beds, doctors—all were ready. Bosun's chairs were rigged for children and the incapacitated. Captain Rostron’s preparations to receive an unknown number of survivors and possibly sufferers was praised by the United States Senate investigating committee as a “marvel” of foresight and masterly organization. Phillips, chief e first name on this memorial to radio operators who died that others might live. The memorial is in the Battery Park of New The name of John George (Jack) operator on the Titanic, is York. Its inscription reads: “Erected in memory of wireless operators fost at sea at the post of duty.”

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Under forced draft, the Carpathia raised her normal 14 knots to well over 17. Engineers anxiously watched the steam gauges; they did not dare to let her have another ounce of ‘steam. The old Carpathia trembled from the increased speed but most of the passengers slept on. To allay alarm, officers and stewards had been instructed that the passengers were not to be told of any change in course. There have been few more thrilling sea races than the Carpathia’s dash through the night and ice. Another ship turned to the rescue, the Mount Temple, some 50 miles to the westward. Her operator, J. Durrant, was also preparing to turn in when the stricken liner's SOS was received. The Mount Temple’s best possible speed was 12 knots and at 3: 00 a. m. she began to encounter ice and 25 minutes later she was stopped by the same field of ice which had stopped the Californian earlier in the night. The Mount Temple reached a position about 14 miles from the sinking Titanic. Durrant's conduct is an example to many present day operators who so often needlessly clutter up the air asking for details on the SOS, or telling others to keep quiet. "I never sent a word after getting his position," was his report. Far and wide over the Atlantic, operators of many nationalities sat tense and silent in little wireless cabins, strain- ing their ears to catch the soft whispers from the British liner. Crystal detectors, or similar non-amplifying types, still ruled in 1912 and signals were none too loud. A number of other ships turned to the rescue, drawn to a common center by the magnetic CQD and SOS. They ques- tioned each other as to details or hurled Women of America erected this memorial “To the brave men who perished in the wreck of the Titanic. They gave their lives that women and children might be saved." It stands in Washington's Potomac Park. 76 the dread news still farther abroad to more distant listeners. On the Titanic, Phillips’ busy and last few hours of life were harassed by the shrill noise of escaping steam, as the engineers reduced pressure on their boilers to prevent an ex- plosion. With no amplifiers, signals were faint. and required quiet to insure accurate recep- tion. Captain Smith got the engineers to reduce the noise somewhat. While he was calmly sending details to Cottam and collect- ing positions of nearby ‘ships, Phillips turned to Bride and suggested that he had better dress. Bride, as yet, had forgotten to do so. Captain Smith, a man of extraordinary calm and decisive action, made a number of trips to the radio room. He reported the engine room filling and, later on, came back and gave the ship another half hour of life. At first Bride acted as messenger, taking all messages to the bridge or wherever the captain was supervising the launching of the lifeboats. Later Phillips went out himself just to “see how things are progressing.” It was his first time away from the key in many hours. He returned to the key looking serious. Women „ and children were being put off in the boats. He told Bride, “Things look queer!” He might well say “queer”; the for- ward deck of the liner was already under water. He resumed his sending and was soon in communication with the Titanic’s sister ship, the Olympic, 500 miles to the eastward. The Baltic advised that she had turned to the rescue. The Russian SS Birma, 70 miles away, radioed that she, too, was on the way, all converging on the icy Grand Banks. On the boat-deck, the work of lowering lifeboats began at 12:20 a. m., 40 minutes after the collision, and proceeded without [Continued on page 118] Modern Mechanix

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Giant Cameras Film Census Data Reproductions of census records on 35 mm. and 16 mm. size films are shown at left. The micro-film camera shown below is de- signed to photograph full pages bound in volumes. From 825 to 850 pages, newspaper size, can be repro- duced on a 100-foot roll of safety film. Film reproduc- tions of card cen- sus records are made with the camera shown above. Records kept on loose sheets are filmed by a different type of camera own below. Magnifying pro- PECIALLY designed giant cameras are being used by the Bureau of the Census to record on motion picture film, in micro- scopic size, the 126 million names and other data gained in the censuses of 1880 and 1900 which have been kept on cards and in 25-pound volumes occupying a mile of shelves. A 95% saving in storage space will be achieved and the data can be re- produced on a screen, when needed, through use of a magnifying projector. The cameras are products of the Eastman Kodak Company, of Rochester, N. Y., and the films are both fire and waterproof, insuring maximum safety for the records. The nine million pages of reports will re- quire only 28 standard size cases of films when photographed. The census data contains facts of impor- tance to many persons attempting to qual- ify for Social Security Act benefits. May, 1937 jectors will flash the microscopic film records on a screen when needed. 77

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Huge Bucket Scoops Standing 18 feet high, this massive alloy steel bucket will take 12-ton bites of coal for the Pittsburgh Coal Co., of Penn- sylvania for whom it was made by Hayward Co., of N. Y. C. Form Scrap Iron Briquettes REATING a new local industry, an enterprising metal firm in Milwaukee, Wis., collects scrap shavings and borings from machine shops and, through use of a huge press exerting 350 tons pressure, converts the scrap metal into briquettes. These are sold to foundries for remelting into castings. The scrap material is hoisted by crane to a hopper above the giant press which then takes only one minute to turn out twelve briquettes weighing eight pounds each. Present production is 20 tons per day, but will be increased to 60 tons daily according to plant officials who endeavor to keep the supply ahead of the ever increasing demand. ' Frank Petrovick, foundryman, examines eight-pound scrap metal briquettes used for making castings. Briquettes are formed under 350-ton pressure. (Milwaukee Journal Photo) 78 12-Ton Load In Single Bite EIGHING 23,000 pounds and featuring a jaw spread of 19 feet, a huge clam shell type coal bucket developed by the Hayward Co., of New York City, is capable of scooping up 12 tons of coal in a single bite. The bucket was built for the Pittsburgh Coal Co., of ` Pittsburgh, Pa. The shells of the bucket are of one-piece alloy steel construction, devoid of rivets, and with streamlined cutting edges that make for easier digging. A power wheel device built into the bucket causes both shells to dig with equal force and efficiency. A closing rope rotates the power wheel and lifts the bucket, the wheel transmitting the force to powerful link chains that serve to close the bucket shells. Tire Changer Aids Air Line United Air Lines mechanic demonstrates device developed for quick and easy removal of tires from air liners. Jack and auto rim device loosens and forces tire from airplane wheel, EVELOPMENT of a new tire changing device by mechanics of United Air Lines at Seattle, Wash., has reduced the time re- quired to change a big air liner's tires from an hour and a half to five minutes. Installa- tion of the device is planned for the air line's stations from coast to coast. The tire changer consists of a steel auto rim welded to two parallel pieces of 11⁄2- inch angle iron. These irons support two pieces of l-inch pipe on which is mounted a l-ton hydraulic jack. Resistance for the jack is provided by two pieces of 24-inch pipe bolted to a hangar girder. The tire is laid on the floor deflated and the auto rim placed over the inner edge of the tire. The jack is then used to apply a steady pressure to break the tire loose.

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276 f m LARGE enough for carrying a small family on a week-end sailing cruise on coastal or inland waters this craft pro- vides the answer to numerous requests for a luxury craft within reach of all boat fans. 9, (

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Fie. d- Profile & Hslr-Breadth Lines NOTE - ALL HEIGHTS ARE MEASURED ABOVE BASE LINE, HALF WIDTHS FROM CENTER LINE. LUNES GIVEN ARE TO OUTSIDE OF PLANKING. o [ 2 3 4 5 & SCALE IN FEET—NOTE- IN CASE OF MINOR VARIATIONS BETWEEN SCALE AND DIMENSIONS GIVEN, THE LATTER (DIMENSIONS) SHOULD ALWAYS BE ACCEPTED AS TRUE RUDDER DIMENSIONS a) GIVEN ELSEWHERE ff E — sca ae oi 1 4-6" = CHINE ` KEEL SIDING — >" “RAISED SHEER Bi j PLANKING 6" WIDE ADDITIONAL DIMENSIONS FOR STEM AND STEM RABBET GIVEN ELSEWHERE BOTTOM PLANKING LAID 45 DEGREES TO KEEL — cin iae! | Designed Especially For Modern Mechanix by Sam Rabl Naval Architect PARTI ARDLY were the plans for Buddy off the press than MopERN MEcHANIX boat fans everywhere began to demand a larger boat along the same general lines. The simple construction of this craft placed her within financial reach of every ambitious youngster who could wield a saw and push a plane. Many of the original craft were built with exceptionally fine results; one of them hav- ing crossed the Gulf of Mexico. Men who earn their living today must be back at the office or shop Monday morning and, of course, require a boat that will not require hours to dock. Nevertheless, the craft must be large enough to provide comfortable accommodations for the average family and not cost too much to build. With all of these essential points in mind plans were drawn up 80 CENTER LINE——— M Here are given the profile and half-breadth lines for Flying Cloud. Make certain that you follow dimensions given. for this "ideal" boat and eventually the boat itself was constructed and christened “Flying Cloud” after that famous old American vessel. Somehow we feel that the spirit of old Donald McKay, designer of the original sailer, will look down kindly upon our miniature version. Flying Cloud may be built as cheaply as possible or it may be constructed of expensive materials. The power plant is either a con- verted auto motor or any inexpensive marine engine. The latter is preferred due to its efficient cooling system which does away with the problem of heat in the cabin. Toilet facilities have been provided and all other necessities of extended cruising have been incorporated into her make-up. The builder can either adopt the cabin plan which we have designed for Flying Cloud or fit one of his own to the existing interior. You may fit the sailing rig or leave it off depending on your own whims. As an out and out motor boat she still has pleasing lines and the draft may be made less than shown by taking three inches off the depth of the keel. While it will not be within the scope of this article to go into the detail of laying down the lines and fitting each and every piece of material in the structure we will refer the reader to our How To Build Twenty Boats for this information. Materials used in Flying Cloud construction may be any locally obtained wood suitable for boat building. Buddys were built from Modern Mechanix

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Body Plan as many different materials as are found around the world from New York to Singa- pore and all are a success. Good solid and well made joints contribute more to the success of any boat than the excellence of the ma- terial. After the backbone is laid down on a large sheet of building paper the shape of the various parts are transferred to the wood either with a tracing wheel or by driving small brads through the outline, with- draw the paper, leaving the brads standing in the wood. The thickness of the stem and keel timbers are such that the ordinary small Shown here are the arrangement plans for the ship’s interior fittings as well as a profile view of the interior. SELF STARTING MARINE MOTOR WITH AUXILIARY SIDE HAND OR FOOT CRANK COMPANION WAY! MOTOR BUFFET. VENTILATED HATCH OVER STEERING GEAK CANVAS COVERED May, 1937 GALLEY E = E DOOR r —Éá—À workshop bandsaw will handle them but the easier method is to take the timbers to a mill that has a large bandsaw and let them do the job. After the timbers are cut and ready to assemble they should be temporarily held to- gether with clamps and a saw run between each joint until the surface is wood to wood. This process is repeated for each joint of the backbone and after all joints are thus fitted they should be smeared with 'Staytite" or other similar cement, or a good roofing cement to exclude water and most of all the destruc- tive toredo found along the seacoast. The joints are made with drift bolts of %-inch galvanized iron headed up over clinch rings or galvanized iron washers. Holes for the drift bolts are drilled a sixteenth smaller than the bolt and the bolt slightly pointed to enter the hole. This pointing is done cold so as not to harm the galvanizing any more than possible, though bolts with nuts and washers may be used if the builder so prefers. After the backbone is assembled the apron of 2"x6" material is securely fastened to the top of the keel using cement as before to seal the joint. This member is left square until the planking is fitted. The backbone is now set up in its proper position on the ground or shop floor being sure to have the proper slope on the bottom of the keel and the stem perfectly plumb athwartship. BASELINE | CABIN FLOOR !S BEST COVERED WITH LINOLEUM i c FIG.2- INBOARD PROFILE & ARRANGEMENT: PLAN S Ss 8!

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FiG. 3- FRAMING PROFILE AND DETAILS OF THE MAIN FRAMES AND TRANSOM — SHADED PORTIONS SHOW KEEL TIMBERS — 0 l 2 3 4 5 73" AFT DECK- ax IZ EDGE GRAIN FIR S / b RAIL CAP HORN TIMBER-(6) STERN POST —(8) 1 € RUDDER POST L. UPPER FRAMES (13) ARE PUT IN AFTER LOWER FRAMEWORK HAS BEEN ERECTED. SEE DETAILS OF THE MAIN FRAMES BELOW BRIDGE DECK - 7/8" X 3" T.&G. STAVING- LAID ON 1-1/8" X 3" CROWN BEAMS, MAST PARDNER NOTE / ee ee Sd i pe | 4 SIDE FRAMES i$ x 22 C.Lewe x mee Era | NOTCH FOR RUDDER SHOE 2] 3 4'- 6" — M 4-6" —————« -- I&——— RAISED SHEER- 492" D. X —— 8 *2 HX — ———- MAIN SHEER- 53" AULOW 1/2 DIAM. DRIFTS . V2" FOR BEVEL _ALLOW "FOR BEVEL — TRANSOM — The main frames are now gotten out along with the transom as shown on the plans, de- ducting the plank thickness, and all joints assembled with %4” galvanized carriage bolts, the joints should be well painted with white lead. 'The notches are cut for the keel, stringers, chines and clamps as shown. The notches for the stringers being half way between the keel and chine or in thirds if two stringers are fitted. The stern knee is set on the keel apron and the transom attached to it. This should be perfectly plumbed and 82 SECTION THROUGH x 3! oak | 8 2 "n s SHAFT ALLEY gr | FLOOR TIMBERS QO) 621 73i Lu 8 l3 x55 LL.PINE 2 " BOTTOM 3 FRAMES. Tome : 247" STRINGERS L.L.PINE L. Lax 295 5"| APRON | LLPINE | Vane y l LINE __ 1%" x 8" OAK OAK PLANKS This framing profile shows the important details of the main construction. The main frames are shown completely dimensioned to facilitate laying these members out. Deduct thickness of the planking in making the layout of frames. either fastened to the shop rafters to keep it so, or braced to the ground with good heavy shores to keep it from moving. The frames are then fastened to the keel, being sure to keep them at perfect right angles to the keel and set perfectly vertical. After all frames are set up they are checked for plumb and squareness and then securely braced to the shop rafters or the ground so that they will not go out of line while the boat is being con- structed. If the structure is erected out in the weather it will be well to give it a coat of good Modern Mechanix

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DECK —7/8"X3" T. &G. VEE EDGE STAVING CUT OUT RAISED SHEER CLAMP THUS FORPORTS

mL rr a aaa a ™ Kea pum a ee as C on Seer i

J =< iN

n 3"

là X22 SIDE” | ËL xene FLOOR FRAMES BEAMS ERU © lg x23 BOTTOM Y. PINE FRAME

L Y. i | 3 4 + 4-6 » < 4'- 6" xm Ee H

5i DECK LINE Fae aa IAE C (CABIN TOP) £ PUT IN NOTE - DIMENSIONS ARE LATER TO OUTSIDE OF PLANKING #3 He 532" CENTER NOTCHES FOR STRINGERS BETWEEN KEEL AND CHINE BOTH SIDES ONALL FRAMES gee C 23 M le

(4)—KEEL SHOE — 42 3°

x BASE BLOCK BREAST HOOK 2s ax lg FOR BITT DECKING

CHINE "ray là X 22 L.LY.PINE

zi LINES INDICATE SIZE OF PLANKS FROM WHICH 4 MAIN TIMBERS ARECUT| 30" FWD. KEEL | STOPWATER SECURE WITH 1/2" GALV. IRON DRIFT BOLTS i 5 S 4 ai 6" —— 9 — —

1 BASELINE

paint to protect it. This should be the pro- cedure even if the boat is built under cover as wood will last a lot longer if properly pro- tected. The best paint to use is one of the new aluminum primers, now on the market either purchased ready mixed or mixed by yourself, With the frames and transom properly braced, the chines and clamps are bent in, thus tying the structure together rigidly. In bend- ing the chines and clamps the best procedure to follow is to bend them in pairs, thus equal- izing the strain on the two sides of the boat. They are best pulled together with a block May, 1937 and fall fastening them to the stem and working aft. They should be procured in one piece if possible, and if this is not possible a butt joint should be made with a reinforcing piece at least three feet long backing up the joint. The inter- mediate frames are now fitted starting from the transom and working forward. Forward of main frame number four they will begin to take curvature and the shape of these frames is obtained by bending thin strips of wood between frame three and the stem and picking up the shape from these strips or rib- bands. The stem rabbet is cut by the same 83

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DETAIL OF FRAME JOINT & SPLICE TO KEEL APRON " 3" (OE X 23 PINE PUT IN - [IN SQUARE ES HAVE BEVEL AS SHOWN - “BEFORE PLANKING com A là x4 3 PINE BOTTOM FRAME: A2X 55 LLPINE |. ` NOTCH FOR CHINE LOG RABBET LINE (MARK OFF WHEN LAYING OUT THE TIMBERS) Moot 4% 2g SALV. CARRIAGE BOLTS & WASHERS V2* DIAM. "GALV.IRON DRIFT BOLT — DETAIL OF -DRIFT Pe JOINT KEEL APRON IS FITTED AFTER MAIN TIMBERS HAVE BEEN ASSEMBLED Described here is the method of as- sembling the keel and stem members. The main timbers of the keel are gotten out first. Encircled numbers serve as a reference to the parts re- quired as well as to the items listed in materials bill available on request. method. The upper frames are now fitted by making patterns at the main frames and fitting the upper frames at these points. The upper clamps are now bent in and the intermediate upper frames set to match the lower ones. Tops of the main frames should be well braced to take the strain of ‘bending the upper clamps. “A pattern of the deck beams is now made to the curvature shown on the plans and the upper clamp trimmed off to suit this curva- ture. The top frames are also sawed off to suit this crown. The beams are now gotten out and dovetailed into the upper clamps. Fit all beams all the way across the boat and cut them. out for the companionway later. Now is also a good time to fit all cockpit and cabin floor beams before the planking is in place as securing good fits is easier at this time as well as having the beams in to take planking strains. Mast pardners as well as base blocks for bitts and cleats will be much easier to fit now and these should be attended to before the planking and decking goes on. The whole of the structure should now be thoroughly painted. The chines and apron should be beveled to suit the bottom planking by laying a straight. edge between the chine and keel, and drain holes should be cut in all of the bottom timbers to allow the free passage of bilge water to the pump. Now is also a good time to fit the gas tank and the fresh water tanks as well as motor control rods and 84 CLINCH.OR HEAD BOLTS myn. OVER GALV. IRON WASHERS SMEAR JOINTS LIBERALLY WITH ROOFING CEMENT BEFORE BOLTING y STOPWATER NOTE: CAREFULLY FIT EACH MEMBER - WOOD TO WOOD - BE- (3) FORE CEMENTING AND BOLTING A FiG.4 FURTHER DETAILS OF THE MAIN ` W TIMBERS SHOWING MANNER OF ASSEMBLY electric wiring that. will be difficult to get to later. l The side planking is now fitted and may be run in parallel strakes or evenly divided between chine and sheer as the owner so desires. If run in parallel strakes, stealer planks.will have to be run in at the sheer and chine to fill out the additional girth forward. These should not end in sharp points but be nibbed into the plank directly below them. The edges of the planks should be outgaged so that they are an eighth inch open on the outside for caulking. No side plank should exceed eight inches in width. The planks should be screwed to the stem and transom but nails may be used to attach them to the frames. Butts of the side planks should be spaced well apart to preserve the strength. The bottom planks are laid athwartship at about forty-five degrees to the keel and treated the same as the side planks. A strip of flannel or old woolen cloth should be in- serted between the chine and planking as well as the apron and the bottom. This flannel or wool should be smeared with Staytite reduced a little with linseed oil to about the con- sistency of thick molasses. The cement should be just thin enough to squeeze out when the planks are set up if a good tight joint is de- sired. Black Staytite is recommended for work below the water line and the gray for work above. Never use the black cement [Continued on page 130] Modern Mechanix

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New York Boy Wins Junior Birdmen Championship TTRACTING contestants from throughout the United States, the Junior Birdmen of America organization held its National Indoor Championship contest at San Antonio, Texas. Lynn Rad- cliffe, of Syracuse, N. Y., was de- clared champion when his model flew for 15 minutes, 20.2 seconds. Radcliffe and Robert Amos, of San Francisco, Calif, who placed second, used model planes featur- ing micro-film covered wings and propellers to secure minimum weight. Soviet Divers Raise Ship Covered with barnacles and other sea growths, the hulk of the steamer Doris has been raised from the bottom of the Black Sea by Soviet divers. Ship was sunk during 1918. OVIET divers have successfully raised the steamer Doris from the bottom of the Black Sea near Sebastopol, Crimea. The ship was sunk in 1918 during a storm. The sides and equipment of the vessel were encrusted with a thick growth of barnacles, adding to its weight and complicating the efforts of the salvage crew. Several previous attempts had been made to raise the ship. May, 1937 Lynn Radcliffe, of Syracuse, N. Y. (right), won the Junior Birdmen of America indoor championship at San Antonio, Texas. Robert Amos, of San Francisco, Calif., was runner-up. Both used micro-film covered models to insure least weight. Truck Refrigerator Devised NEW type of refrigeration unit for trucks in which no compressors or other mechanism is used has been developed. The entire device can be quickly installed in any new or old enclosed truck. The installation consists of a unit charged with a liquid refrigerant, and a heat- radiating device charged with a liquid chemical which absorbs gas evaporating in the refrigerating unit. Both are refillable. A full charge of liquid refrigerant lasts 48 hours in hot weather and the truck driver. can control the temperature of the chamber through the medium of a simple valve. The device can be shut off when not needed, effecting savings in chemicals used. No compressor is used in this truck refrigerating unit. A liquid refrigerant and a chemically-charged device that ab- sorbs gas evaporating from the refrigerant is its secret. 85

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‘Household Aids For Milady 86 This young lady is storing leftovers in the triple food saver compartment of her new model electric refrigerator. Another feature to delight the modern housewife is a special com- pattment for keeping fruits and vegetables. Greater economy in operating and maintenance cost is claimed for the 1937 refrigerators. Kept in a lower drawer when not in use, this handy portable deep-well electric cooker is ther- mostatically controlled and can be used for any cooking purpose with a minimum of time and ex- pense. The gleaming white cooker can be attached to outlets on an electric range or to any convenient outlet. This safety type wringer was invented by H. L. Morin, of Holyoke, Mass. Clothes are fed to wringer on perforated feed belt and should hand acciden- tally follow, it raises upper guide which causes mercury switch to stop the wringer. Simple in construction, this orange peeling de- vice was invented by Ernesto Cancio Erro, of Havana, Cuba. It is de- signed to peel half a dozen oranges per minute and efficient and reliable operation is claimed. Tak- ing little space, the device can be set up either hori- zontally or vertically. Its reversible knife has two cutting edges. Photos show two steps in peeling. Modern Mechanix

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Diesel Locomotive Used In ORKING in a tunnel 95 feet below the streets of London, England, a Ruston Diesel powered locomotive is being used to haul the heavy loads of supplies and dirt in- volved in the construction of a tube to link the Bakerloo and Metropolitan Railways. The exhaust gases from the engine are removed from the tunnel through use of a patented filter device. The Diesel locomotive is said to haul heavier loads and to be more economical in operation than the regular gasoline powered engines usually used for similar work. Wheel Weighs 500 Tons Weighing 500 tons and standing over 25 feet high, this huge wheel will be part of a German-built generator that will supply electricity for ati entire South American country. GIANT generator wheel weighing 500 tons and having a shaft weighing 35 tons has been built by an electric equipment manu- facturer in Berlin, Germany. The outside diameter of the huge wheel is over 25 feet. The wheel is part of a water power genera- tor being constructed for the government of Uruguay to help supply its electric power. The finished generator will have two of the massive wheels and will be shipped in sections due to its great weight and bulk. May, 1937 Underground Tube This Diesel powered locomotive is used to haul heavy loads in a tunnel 95 feet below the streets of London, England. Exhaust fumes are removed from tunnel by a filter device. Bicycle Trailer Has Radio EATURING a built-in radio, a midget bicycle trailer weighing 60 pounds has been constructed by William Moll, of Minne- apolis, Minn. The radio is dialed from the handlebars of the towing bicycle. Two hinged doors keep the trailer interior dustproof and ample room is provided for a - tent, gas stove, food, and other camping equipment. A 6-volt battery supplies current for tail lights mounted on a small bumper as well as for the radio receiving set. The trailer is streamlined and designed to ride low on midget tires, being five feet long and two and one-half feet wide. Designed for camping or deliver trailer built by William Moll, o a builtin radio controlled from the bicycle's handlebars. use, this midget bicycle Minneapolis, Minn., has 87

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Western Craftsmen Add To Glory Of Fabulous East These exquisite 3,000-Ib. bronze doors were cast by English craftsmen in Birmingham, England, for the centuries-old palace of S. Maharaja of Jodhpur, wealthy Indian potentate. "Fist" Aids Berry Pickers UARDING the hands of berry pickers in the fruit patches of California, a “mailed fist" is the latest aid to labor. It slips over the the hand, leaving thumb and fingers clear. The berries drop onto a curved deflec- tor lying snugly in the palm, which by-passes them into a bottom compart- ment to be emp- tied into boxes. This ‘mailed fist" speeds berry Picking and protects the bands. 88 ESTERN craftsmanship has been utilized to add a modern lustre to the mystic East with the casting in Birmingham, England, of a pair of bronze doors for the palace of the Maharaja of Jodhpur. Twelve feet, six inches high and six feet wide, each door weighs 1,500 pounds. Each bears an eagle and sword motif on both sides, is richly modeled in relief and hand chased. The grip handles comprise camel heads with tasseled halters. The doors will grace an entrance to one of the palace’s many ornate halls. The palace, a large and handsome building overlooking the city of Jodhphur, built in 1459, is itself contained within a massive fort which stands on an isolated rock 200 feet above the heavily walled and historic city on the plains. The Maharaja of Jodhphur is con- sidered to be one of the most wealthy of India’s native rulers. Floating PO For Ships Claimed to be the world's only floating post office, this tug cruises on the Detroit River, picking up and delivering mail to freighters plying the Great Lakes, making 25,000 contacts annuaily. AKING 25,000 connections annually with freighters that ply the Great Lakes, what is claimed to be the world’s only floating post office is a small tug that cruises the Detroit River, picking up and delivering an average of 3,000 letters, 150 newspapers and magazines and 75 parcels a day. The floating post office pulls alongside the boats, and with- out either ship stopping, transfers mail to and from vessels by pails and pouches suspended on ropes. The unique service, which even includes handling money orders, was in- augurated because of the uncertain schedules of freight boats. The Detroit River is the location because it is the bottle neck of the Great Lakes, and all boats that sail the lakes go up or down the river at one time or an- other. Modern Mechanix

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This attractive Hors-d’oeuvre Tray makes an attractive one- evening project for the workshop fan. Constructed from maple plywood and solid stock it requires only a jig saw and lathe for machining. Dimensions of components are shown at right. IGHT refreshments at bridge or tea are nre attractively served with this tray. A toothpick hub provides brightly colored skewers for dainty titbits. Ample room is found on the tray itself for sandwiches, bever- ages and so forth. Construction is obviously simple. All stock is of maple. Toothpick hub and base, solid. Handle, rim and bottom, plywood. The bottom and rim are both 1134” in diameter; 34” is the width of the rim. Glue the rim to the bottom and when the glue has set, sand the circumference to a uniform smoothness. Lay off on a piece of 35" maple plywood the outline of the handle, using one inch squares. Saw out and sand away the cutting marks. j Next we come to the lathe-machined mem- bers, the base and toothpick hub. Three- May, 1937 "SQUARES quarter inch stock forms the base, which is first jig-sawed and then turned on the face- plate to the design shown. Sanding is most readily done while the base is in the lathe. A hole should be drilled and countersunk in the center of the base to receive a long wood screw. For the toothpick hub, a template is made according'to the diagram, employing 1" squares in the lay-out. 89

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A GAS MASK FOR A mask for spraying and fumigating purposes is a neces- sary protection against dangerous fumes. gas mask is made from ordinary household materials. SERVICEABLE gas mask which will prove highly efficient when working in smoke and dust can be easily constructed by anyone from common materials and at little or no cost. While the respirator unit about to be described is not as efficient as some commercial types it is, nevertheless, quite satisfactory for ordinary disinfecting use. A few pieces of duck cloth, leather, cellu- loid, a tin container, cotton wadding and activated charcoal comprise the materials used in making the mask. Most any work- shop will yield all necessary materials except the activated charcoal and this can be ob- tained at the corner drug store. To make the respirator a pattern is first drawn on stiff cardboard to the shape and size shown in the pattern illustration. This size is satisfactory for the average adult. If one 90 This practical An army officer de- scribes the construc- tion of a practical. fumigation mask. The completed gas mask and basic materials used in constructing mask ate pictured above. Left— Two types of commercial masks of practical design. has an unusual face, a little experimentation will enable one to make the required changes in dimensions to meet his particular needs. The facepiece is made from double thick- ness of tightly woven medium weight water- proof duck or leather which is treated on the contact surface between the layers with boiled linseed oil to which has been added 10% of castor oil. The two faceblanks are cut from selected duck cloth according to pattern made as out- lined above. The contact surfaces of the facepieces are dampened with the oil and then stitched in place by hand prior to sewing on a shoe machine. With a little patience all the sewing can be done by hand. Eyepieces are next cut from clear celluloid or cellulose acetate film in the form of squares approximately three inches on the side with Modern Mechanix

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Fumigating Purposes by Major M. E. Barker, C.W.S. the corners rounded, The eyepieces are then slipped in place between the two layers of the facepiece and the facepiece sewed around the edge of the eyepiece. Cellulose acetate or rubber cement is then applied between the lens and the two layers of the facepiece and the facepiece is sewed through the eyepiece and cement applied to the seam. This pro- cedure is necessary in order to produce a gas tight fit of the eyepieces in a facepiece of this design. A band of soft leather about one inch wide is cut to fit the inside of the facepiece. This is sewed in place with two seams. The purpose of the soft leather is to give an air tight fit between the edge of the facepiece and the face. The chin seam is now put together over a piece of wood slightly smaller than the tin can to be used as a canister. The chin seam is thoroughly sewed in place, the leather band end : ickly slipped he head, th inside the outer edge of the mu MU ML MEER facepiece is cut to give a snug E fit, and olive drab colored ad- I" SOFT LEATHER BAND SEWED AROUND EDGE OF FACEPIECE SEW AROUND EDGE OF. EYEPIECE TO FORM POCKET Qo APPLY RUBBER CEMENT WA BETWEEN LAYERS AND : CELLULOIO BEFORE SEWING # Y ue sw. TO SEAM V CLEAR CELLULOID EYEPIECE , CONTACT SURFACES ARE OILED BEFORE SEWING CANISTER PLACE LAYER OF (SEE DETAIL) TAPE AROUND EDGE : P OF CANNISTER AND " WIRE FACEPIECE FORCE THROUGH FACE TO CANN STER BEC OBEN IAG -COVER WIRING WITH ADHESIVE TAPE This pictorial diagram shows the construction details of Major Barker’s breathing mask. The mask itself is made of leather. The breathing unit is an ordinary tin can containing cotton wadding and activated charcoal. May, 1937 PPLY CEMENT gm SN mask is ready for immediate No annoying breathing tubes required with this respirator. ABOUT 4" LONG DOUBLE THICKNESS OF DUCK CLOTH » % ELASTIC BANDS i SELECTED DUCK / (sEE DETAIL i, OF PATTERN) . USE .FORM SLIGHTLY SMALLER THAN : CANNISTER WHEN SEWING CHIN SEAI 91

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Here is the gas task before the assembling operation. Celluloid eyepieces are-sewed between leather face blanks. A completed mask, ready for use, is shown at upper right. hesive tape is used to bind the seam and render it airtight. Five pieces of standard elastic 34 of an inch wide are sewed to the facepiece So that one elastic strap passes over the center of the forehead, one along each temple and one just above the point of the jaw on each side of the face. This spacing of the head harness elastic straps is necessary to give the facepiece a snug fit on the face and to carry the suspended weight of the canister. A pad about three by four inches in size made of two thicknesses of duck cloth of the same variety as used in the facepieces is now sewed to the ends of the elastic so as to give a tight fit to the facepiece for the average wearer. This is best determined by actual test. However, the temple straps should be about four inches long between the pad and the edge of the facepiece while the chin and forehead straps should be approximately five inches in length. The canister is made from a standard size No. 3 commercial tin can by perforating the top and bottom each with about one hundred small holes such as produced by a six-penny nail. The can can be cut off about one inch in length and still produce a satisfactory canister which is easier to wear, although the can as purchased is satisfactory. The inside of the canister is coated with liquid glue or a good grade of adhesive of some other type. A piece of absorbent cotton pad in the form of thin layers, is now cut to 92 STANDARD SIZE NO. 3 TIN CAN COAT INSIDE WITH LIQUID GLUE = LEE LTP EOD j Bere COTTON ADDED LD THE FILLING £ PLACE LAYER OF B Y Gl ET et S4 ABSORBENT COTTON : 22] 7 ALL AROUND IN- OF COTTON GLUED IN PLACE FG aml | iili; cai GRANULES OF ACTIVATED CHARCOAL (BUCKSHOT SIZE) DETAIL OF CANISTER Cross-sectional view of the filter canister is illustrated above. No. 3 tin can with both ends punched with small holes contains the filtering materials. Left—Cut the face blanks from the pattern shown here. fit the can. These two layers are now placed in the can and the edges pressed against the can to secure adhesion. Activated chareoal in granules about the size of buckshot is now filled in the canister to a depth of about two inches, then an ad- ditional layer of absorbent cotton cemented in place and ordinary fluffy cotton added on top to hold the filling in place. The top is then rolled into place on the can. This can be done in satisfactory fashion with a pair of small round nosed pliers. The hole in the facepiece is now sewed with two seams about 45 inch apart. A layer of adhesive tape is fastened around the top of the canister and the canister is slipped through the hole in the facepiece. If the work has been well done a small amount of force is required to push the canister through the facepiece, but there is ample stretch to the facepiece to accommodate the canister. The facepiece after being wired to the canister and the wire covered with adhesive tape is now ready to wear. The mask outlined above is highly effective in removing dust, smoke and obnoxious gas from the air breathed by wearer. Modern Mechanix

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Handikinks For The Workshop Lettering Pen Made From Skewer — P! PRACTICE | OR emergency sign lettering when no pen is available A 4 | an excellent substitute can be carved from a dowel wx a s CCCCO02 Jf Stick or meat skewer. With a sharp knife or razor cut o | down the end of the stick to form a sharp chisel-like edge; the thinner this point is made the better the pen will write. Next, proceed to make the ink reservoir. This consists of a vee shaped groove cut in one side of the chisel edge. Exercise care in making this cut so that the point is not damaged by the razor cutting through it. Several pens with points of different widths can be made for various types of lettering work. The pens are used in the same manner as a brush although in letter- ing with them they respond in much the same manner as a lettering pen.—R. Peterson, Cos Cobb, Conn. Guard Bumper Deadens Noise N MAKING rapid repetition cuts on a jointer the objectionable noise caused by the flap guard constantly banging against the fence can be effectively eliminated by fastening a strip of rubber to the edge of the guard allowing it to extend around the edges. Work can be y passed repeatedly through the machine without the ANCUTA usual noise resulting.—Wayne Leckey, Aurora, Ill. Auto Radiator Forms Air Conditioner N AUTOMOBILE radiator and fan can be used in a novel shop air conditioner that will maintain a uni- form degree of humidity in the workshop. Mount the radiator on a firm foundation and attach a light electric ' motor to the fan belt. To the intake cock attach a length of garden hose for connecting to a water faucet. Close the top radiator opening with a plug and fit a hose leading to the sewer drain to the overflow tube. To use the condi- tioner, turn on the fan and open the water faucet.—P. M. | Olinger, Portsmouth, Iowa. MASS | JO ee Headlight Shells Operate Wind Sign F OR the ambitious garage repair man this novel wind sign offers many possibilities for attracting new business. From wrecked cars salvage four headlight shells and weld or solder them to light tubing or lengths of broom handle. Attach them to an upright post fitted loosely in a flange mounted. on the roof of the garage. A suitable sign is painted on sheet metal and fas- tened to the top of the upright member in the manner illustrated. Do not make the sign too large or wind resistance may prevent its revolving. Grease both the upright post or pipe and the flange with graphite or a similar lubricant.—Robert Poulson, Los An- geles, Calif. — ^ AUTO RADIATOR, FAN AND BELT WATER INLET (FORMER OUTLET) May, 1937 93 .

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ROPE STUNTS FOR THE : " ENE x QF MANNER OF Neve. | sumens JL ET ROPE À OP a z. f d : DOUBLED ROPES AP Su LooPED («sa ROPES Wp eer T» LD LY LE DOUBLE ROPES POOPED TOGETHER SE AT BACK OF NECK J THUMB OF ONE HAND IS : INSERTED BETWEEN TWO ROPES BEFORE PULLING THEM FREE. WHILE JERKING, THUMB OF OTHER HAND IS INSERTED IN SIMILAR MAN~ NER TO STRETCH ROPES TO BO Vm SLACKNESS ROPE, TO BE IS OBTAINED KNOTTED J PALMS SHOULD CONCEAL THUMBS. T DURING THE T YING The amateur escape artist can free himself from rope bonds securely tied around his wrists if the rope is wound as indicated in these steps before a member of the audience is permitted to tie up the final knots. ROVIDED with a hank of sash cord any- one with a little practice can put on an escape act that will compare favorably with similar acts performed by professional magicians. While some people are often led to believe that magic acts and illusions can be performed only by those possessing super- natural powers it should be clearly under- stood now and always that there is no magician or any other person relying on any- thing but skill for his effects. This same rule applies to the amateur magician and escape artist and before actually presenting these stunts to your friends be sure that you have mastered them by performing before a mirror or with a confidential assistant. Š ; n Although a double rope around the performer's neck A very good stunt for beginning an escape apparently passes completely through it, when the ends presentation is the “Shackled Wrist Escape.” are pulled by spectators, the rope actually is a double loop locked in th nter with thumb and forefinger. Offer a spectator a length of sash cord and iei C DE : instruct him to tie up your hands by wrap- ping it around your wrists and bringing it 94 Modern Mechanix

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AMATEUR "Escape" ARTIST THE. GHOST RELEASE Ñ eme tne Although members of the audience are allowed to bind the performer with a one hundred foot coil of sash rope the escape, which involves no trickery, is simple. The performer depends upon human nature for its success. May, 1937 SHOWING METHOD OF CONCEALING THREADED ROPES IN ——' HAND While apparently bound securely to a chair with doubled rope escape is simple since the ropes are secretly joined together with thread. The joints are concealed from view so that detection by the spectators is almost impossible. down between the hands then wrapping it around the bottom cord as described in the accompanying illustrations. After doing this, permit the spectator to knot the cords as often as he likes so long as he is satisfied that you are securely bound. Now turn to the audi- ence and announce that you will free your bonds before they can count to ten. Saying this, turn your back to the audience and jerk your wrists. The cords will now be sufficiently loose so that you ean free your hands in a moment. Like many escape stunts, this one depends upon the method used in tying the knot. i “The Strangle Rope Escape” is one of the most effective rope tricks eyer devised and unquestionably the simplest to perform. Here the performer makes it appear that after he has been securely bound around the neck with a double rope he allows two spectators to grasp each end of the double rope and [Continued on page 126] 95

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// : 11 Runlite-a RAILER owners incline to divide into two schools of thought; one group wanting the kind of trailer in which they can, if necessary, live permanently—the other preferring some- thing rather lighter and more suitable for use on extended trips, such as vacations, where economy and high cruising speeds are of major importance, Runlite has been designed for the latter group. By placing the wheels quite far aft it has been possible to make this an underslung job, making it directly possible to combine really effective streamlining with marked sta- bility. The weight of the whole trailer being so low, much of the weight is carried by the tongue, a matter of no particular concern in the case of Runlite since it is normal for a load of 150 or even 200 pounds to be dis- tributed on the hitch of all trailers. Runlite can actually be towed at a 60 m. p. h. gait without straining any good light car. Straightforward methods of construction are used in this design. There is practically no welding and absolutely no special machine work to be done. The roof, which at first glance may seem a problem, is actually simpler to construct than that of the average trailer. Another word before starting in on the actual construction work: Comparison will reveal some slight difference between photos and drawings in this article. Itis quite unim- portant and, as far as that goes, the curves, 96 Designed for the person who prefers a light port- able shelter to a more commodious trailer, this lightweight streamlined modern vehicle is note- worthy for its low cost and safety at high speeds. Looking into the “cabin” through the open galley hatch. ‘“Runlite’ has ample space for two full length spring mattresses. Below—Body plan dimensioned to scale. D 56" TREAD * BODY PLAN SCALE Ly ij! Foot the width and the over all height may be modified to suit the builder’s requirements. Start with the frame. What few welded joints you will have to make are encountered here. If you lack the proper equipment or experience have the welding done by an expert. The cost will be low and the sense of security a good deal greater. Use an old Model T Ford frame. At your local junk yard these should be anywhere from 75 cents to $2.75. Using a hacksaw, cut out a 1344” length on each side 7” from the front end. Saw out the channels to fit and weld at right angles so that the frame now has a 1344” kick-up as shown in the drawings. Modern Mechanix

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Traveling Bedroom An angle iron tie piece li4"xlVA"xj" is welded across the bottom of the frame as shown in the perspective drawing of the frame. At the rear end the rear face of the spring perch is cut off with torch or hacksaw. Into the perch a 2"x4", preferably of white oak, is carefully fitted. This beam should be the full width of the body and its obvious purpose is clearly shown in the drawings. Two more lengths of Ford T frame are used for the trailer tongue and the cross-member to which it is anchored. Joints here may be ‘either by welding or bolting. It will be necessary to cut out the filler piece for the tongue—which is bolted securely to the spring perch as well as to the channel cross piece. Bolt or weld a standard hitch to end of tongue. The height of hitch can be adjusted by heating tongue and bending upwards. OUTDOOR PROFILE o [i SCALEFINCHES & FEET STREAMLINE HANDLE AND AUTO LOCK TWO COATS ALUMINUM PIGMENTED DOPE... PAINT EXTERIOR IN GUNMETAL OR DEEP GRAY N, og £ HASP AND PADLOCK Only four leaves of the front spring are used. A shim is put in under the perch clip bottom to compensate for the leaves removed. Second hand Model T steering tie rods are used in the manner shown for radius rods. The ball and socket fixtures for the frame end of the rods are from regular Ford radius rods. They should be welded on. The axle ends of the rods may be attached either by flattening and bolting direct to the wing spring perches, as shown, or drilled clear through the axle and bolted either side. This latter method pro- vides an easy method of aligning the wheels. 20"x4" wheels from a motorcycle pick-up trailer are used. Such wheels fit Model T Ford spindles without change. They cost about $4.00 each and the tires about the same. The completed frame, ball hitch, radius rods. UPHOLSTERER'S EDGING (CHEAPER) —7 OR IX 1/2" ALUM. MOULDING COVERS. \ TACKED EDGE m TONGUE MAY BE BENT UP TO FIT. CAR HITCH USED LIGHTS BOTH SIDES TOSUIT. ` | \ BRAKE & TAIL g | “LIMIT LIGHT "*— OVERALL cemere [s -— la f Thes HITCH TO sums E PAUSE (il ies The profile lines of "Runlite," accurately scaled above, convey immediately grace and speed of the design. While the basic design should not be tampered with, headroom and width can be increased, if builder wishes, without harming the appear- ance of fast stepping trailerette. Photograph here shows to ad- vantage the charm small trailers of this type hold. Note excel- lent proportions of this vast pocket trailer—its very low- hung position, practical cooking facilities, obvious roominess. Hardly higher than small car, it sleeps and feeds two adults! May, 1937 ase ! Gea aa pa ged a rm) EC cs | i i ~ UNDER SIDE OF BODY WOODWORK BARN-PAINT RED

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wheels and tires should not cost over $20.00 with welding included. The steering tie rod is cut in two, the ends flattened and bolted to the axle as shown. This completes the entire chassis and the rest of the job is straight woodwork (with a little tin work here and there). Build the floor as a foundation for the body. Second grade Oregon pine flooring, tongued and grooved, is bolted to the chassis frame starting at the rear end and working toward the towing end of the trailer. This flooring should be wide enough to finish 6114” wide after trimming the sides for straightness. Rabbet the first plank laid to hold the !4" bulkhead as shown and. cut out where neces- sary for the spring perch at the towing end. This cut out is later covered with tin—see drawings. Lay a straightedge along the sides and saw off flush. Next screw in the 1"x2" and 2"x2" stringers to the underside of the flooring as shown in the drawings, allowing the ends to project several inches beyond the floor at the rear. Stanchions No. 3 and the 2"x4" uprights are mortised into these projecting ends and the stringers trimmed off flush as shown in the detail sketches. The stanchion framing can now be com- pleted. The heels of the stanchions are boxed into the floor and bolted into the 1"x2" edge or side piece. With the main stanchions in the Y4" plywood or hard Celotex bulkheads can be installed and the boxes for the wheels built 'These plan views of the trailer, chassis and floor frame, used in conjunction with indoor profile plans on the following page (and the sectional views of the body), should be studied carefully. T STANCHIONS —() DOOR STOP up. Framing for cupboards, water tank, sink and so forth is left until the body has been puilt. Cut out the crown carlins and also the bow plate. Detail drawings give the dimensions and it will be noted that 11 carlins in all are required. Some of these are used for the roof —three being bolted to the main stanchions already installed. The remaining carlins are required for bow and stern, and for the hatch. Install the bow plate in the manner shown. It is cut on a 72" radius, is 34” thick and 634” deep. It is screwed to the riser strip which in turn is bolted to the filler piece in the spring perch. The side clamps or roof strips can now be sawed to shape and mortised into the tops of the stanchions as shown. They may be lightly screwed until the outer sheathing is applied. This sheathing, of fir plywood, 34" thick, or hard Celotex, is screwed directly to the stanchions, floor edges and 1”x2” outer strips. The carlins at front and back of the trailer are put in with knees as shown. Do not apply the sheathing to the front end of the trailer until the roof battens have been bent in. If these prove stiff, soaking for half a day under the lawn sprinkler will render them pliable. They are fastened over the carlins without notches except where they bend into the front, or bow cabin, They are notched flush into this former. Use light screws to secure the roof battens. The lift-up cover over the galley, called a hatch in the drawings, is built up in the manner shown. The longitudinal carlins are cut to the same sweep as the roof from 34” WHEEL BOXES PLY- HATCH LIMITS WOOD OR SHT METAL. © ANGULAR SPLASH BOARD 4 SHEATHING in ia" 24* ‘i = i= l 718" X1 3/4" W.0AK | i UPRIGHT MORTISE | INTO BOW PLATE STANDARD HITCH | SW DRILL FOR V/4" STOVE BOLTS BOW PLATE OR CARLIN CUT FROM 3/4 5-PLY ON 74" Ma 1 | a |" X 2" RISER LM M Y OAK FILLER PIECE CUT OUT FLOOR HERE FOR FRAME. UPSET AND COVER LATER WITH TIN Ei FORO MODEL "T" FRAME crc | 13/4" X 1" OAK STERN | CARUNS À |" To SAME ' CURVE AS THE ROOF | CARLINS 3/4" X 6" OREGON REMOVEABLE SHELF. PINE FLOORING FOR SINK AND STOVE ss me - PLYWOOD BULKHEADS e" FOR COMPLETE. até DETAILS SEE PERSPECTIVE FRAME KICK-UP GE SHEATHING LINE NOTE SHEATHING HALF-PLANS OF FLOOR AND CHASSIS FRAME * NOTE-IF LARGER WHEELS ARE USED-WIDEN BODY TO SUIT : 98 20" X 4" WHEELS | | i | 3" » SCALE IN FEET Por Modern Mechanix

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Drawing above, in conjunction with the cross-section drawing below, gives many details and dimensions which will be help- ful to builder. Lines for curve of roof edge should be taken off "outdoor" profile drawing, or at least checked from that plan. Completed body, teady to be covered, shown at right, will aid in teading the plans shown. plywood. Cut out four of these carlins, two of them being permanently attached to the stern portion of the body frame as shown. The other two of course form the sides of the hatch itself. A tin gutter should be hammered out and fitted along the edges of the hatch opening in the manner shown. Attach the sheathing to the front end now. It will bend to the slight curve quite easily. The door is clearly indicated. Lock ar- rangement and so on is left to the builder though a streamlined blind door handle was used on the trailer pictured. A 12" porthole is cut into the door and another one exactly opposite in the sheathing on the other side. A screen is secured to the outside of each port and inside they are furnished with hinged windows as clearly shown. Glass or May, 1937 BOLT TO / HATCH O CARLIN ROD AND TOGGLE BEND TO FORM HOLDING HOOK DRILL FOR HOOK 174" X 11/4" W.OAK ROOF BATTENS HATCH LIMITS (HALF BREADTH) & ko | SHEATHING SINK ANO STOVE SHELF SN] E STANCHION S| F NUMBER 3 j OAK FILLER 4 ji | MOULDING LOOKING AFT LOOKING FORWARD ) SECTION THROUGH BODY AT STANCHION NO.3 ` 99

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airplane windshield pyralin are equally satis- factory for these windows. It has been found that the two ports provide ample ventilation for even the hottest weather. The next step is to cover the roof. Use grade A muslin costing 18 to 24 cents a yard at most stores. Start at the front end, tacking NOTCH LATER on 1” centers with small carpet tacks, and

ROOF CARLIN NOTCH FLOOR AND OUTSIDE j 1"X2" STRINGER SIE MACHINEOR CARRIAGE BOLT

HOR CLAMPS stretch lightly over the sides as you proceed toward the rear until the tail carlin is reached. MARRIAGE BOLT With two gallons of aluminum pigmented Goose ON DETAIL 'C/ TYPICAL nitrate dope you will be able to render the SIDE FRAMING JOINT. ROOF CARLIN JOINT roof drum tight and waterproof. Correct

[ex isa procedure in doping cloth is to lay the first T 7 coat on around the edges and work toward the center. The edges can be finished with either aluminum edging or regular uphol- sterer’s edging. Both are obtainable at auto- mobile stores. i The galley is pretty thoroughly covered EotT in the various drawings. The space formed TOGETHER by the two bulkheads makes a good place for odd clothes or other stowage. It extends from wheel box to wheel box, is 13” deep and about 8” wide. NAILING STRIP A A VE

= = H LAA VESNE EAA CN 2" X 2" DETAIL 'BB'- FRAMING JOINTS AT AFTER END NOTE HOW STRINGERS PRO- JECT BEYOND THE FLOORING

SAW OFF REAR FACE aren ht SNES pie) SEE DETAIL 'C! FORJOINT A ERDER TO le GEE #3 ROOF CARLIN SS. eee ROME a Ss Em 3-PLY SHEATHING | REMOVEABLE SINK SHELF- pue | CUT TOFIT FROM 1/2" CELOTEX 1" X 13/4" W. OAK SIDE CLAMPS SET INTO a LIEN " BOW PLATE me ~ - M SCREW OR PINE RISER BOLT TO CLEAT

NOTCH FOR STRINGERS OAK FILLER - YS CUT IN CENTER FORTONGUE £z 2"x2" mx 2" SEE DETAIL 'A' FOR MORTISED JOINT 3/4" X 6" SECOND GRADE T. & G. PINE FLOORING ` M SEE DETAILS 'B B' FOR 7 4 CUT AND FLATTEN TIE ROD>S. METHOD OF MORTISING JOINT < E poe nM BOLT FLATTENED END TO AXLE © HERE Van x 11/4" X 3/16" ANGLE IRON

FLATTEN ENDS OF RADIUS RODS — BOLT HERE 77 " 20" X 4" WHEELS FIT FORD MODEL e "T" SPINDLES WITHOUT ALTERATIONS Ire GENERAL. PERSPECTIVE CONSTRUCTION DRAWING SHOWING FLOORING AND OTHER FRAMING DETAIL

This important construction drawing is not in scale but is arranged to show the general detail of the chassis, the flooring and—above—the principal stanchion joints. Note how the frame is "kicked up" in order to undersling the trailer. Note also the framing about the wheel boxes and the installation of the bulkheads and the bow plate. Study with the photo at right. 100 Modern Mechanix

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Immediately aft of this compartment the sink and stove shelf is located. This shelf is made re»dily detachable so that the axle may be inspected if necessary or to per- mit the easy placing of a jack under the axle in case of flat tires. The shelf rests on a light framing of 1"x2" pine as shown in the drawings. It can be held in place by a few light screws or by four wing nuts. The stove is secured to it in the manner shown and a simple sink can be made from a large cake pan and set into the shelf with small screws. A muslin apron, tacked from shelf carlin to rear carlin and from wheel box inner panels, serves to keep the dust out. This apron should be doped. The tank for water may be any size and the details of its installation will naturally depend upor the size used. In any case it should be so arranged as to empty directly into the sink. Cupboards and shelves may be any way you prefer. A Here is an exceptionally clear picture of the simple door. It may be varied but it is hard to improve for simplicity and sturdy construction. Note the blind door handle box-—not shown in the drawings below. CUT OUT ALL ROOF AND END CARLINS THUS FROM Gjin 3/4" 5-PLY FIR E Make ll | 7 BATTENS SIZE AND SPACING AS IN ROOF DETAIL OF HATCH MUSLIN COVERING TACK OOWN HATCH FRAMING (CARLINS) 3/4" X 1 3/4" S-PLY FIR STIFFEN WITH TRI- ANGULAR BLOCKS 4. GLASS OR PYRALIN MUSLIN DUST APRON. TACK TO REAR CARLINS AND DOPE SCREEN SHEATHING TO CLEAR FLOOR DETAIL OF DOOR sHowine HINGED GLASS WINDOW CLOSED CUT OUT INSIDE PANELS BODY DETAILS - NOTE-FASTEN OF WHEEL BOXES TO PRO- RUNLITE BLUEPRINTS BATTENS AND SHEATHING BY MEANS . VIDE CLEARANCE WHERE Large blueprint plans for building ‘‘Runlite” OF LIGHT BRASS OR COPPER SCREWS THE AXLE PASSES THRU. printed on tough rag content paper are available from Modern Mechanix Publ. Co., 1501 Broadway, New York City. Order Blueprint No. T-29 at $2.00 The roof carlins or beams are cut in the. manner shown above. Galley hatch side carlins are cut to normal profile body lines. May, 1937 101

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simple arrangement as used by Mr. Trenmore Garstone, builder of the trailer illustrated, is shown in the sketches. Lighting details are left to the builder. Two dome lights proved ample for Runlite. Paint the entire under portion of the trailer with barn red paint to prevent weathering. The interior, including the floor is finished cream. The under side of the muslin roof should not be painted. The exterior sheath- ing is finished in Duco gunmetal. Completed, your Runlite trailer should not cost more than $75.00 at the outside. It can be built for less if you know how and where to buy. OTHER MM TRAILER PLANS In addition to the plans for building "Runlite" which are available at $2.00 postpaid, MM can also supply plans for the trailers listed below and described in detail in the 1937 Blueprint Booklet, copies of which are obtainable for 3c. T-26 Collapsible Trailer (14'x6'x6' 10") ....$1.50 T-27 "Wander" Cabin Trailer This front view of body ready for roof covering to be tacked on shows the roof carlins, battens and bow details very clearly. m-— owe SIU e e eC 1.00 : E AD | T-28 "Cruisemite" Steel Frame Trailer LOTOWELS - | yi (8:3 x I2/x7 4) eoe eere 1.50 HAMMER (SHELVES i T-30 "Tourabou?" Wood Frame Trailer TO SHAPE ut (16 x6lo x64) esee 1.50 FROM TIN All blueprints are printed on durable rag con- tent paper to withstand rough usage. Send orders for blueprints to: MODERN MECHANIX PUBL. CO., Fawcett Bldg., Greenwich, Conn. et NAIL. TO CARLIN SEE SECTION ud OF GUTTER TIN TRAY. CABINET SPRING Za. HINGES The sketch at left shows one method of fixing up the pantry side of the galley. It also shows details such as the rain gutter and the stove and sink attachment. Down below the port- hole exterior is de- picted. There is one port on each side in this design. Immedi- WING NUTS HOLD MAKE SINK FROM ately below we see this COLEMAN STOVE LARGE CAKE PAN dashing “air flow” TO SINK PANEL - OR AS DESIRED trailer all set to go. Í SINK PANEL FITS INTO | FRAME — IS HELD = RS IN PLACE BY WING A NUTS OR SCREWS iy TO PERMIT EASY : REMOVAL FOR MUSLIN INSPECTION = SUGGESTED PANTRY ARRANGEMENT ALUMINUM EDGING X TACK OVER SCREEN — —> — P. OUTSIDE OF À SHEATHING 102 Modern Mechanix

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ot Time Saving Kinks for Housewives PUNCH HOLESIN PAPER PLATES AND * LACE TOGETHER WITH Mi LEATHER STRIPS CUT FROM OLD SUEDE JACKET = Paper Plates Make Wall Holders TTRACTIVE wall holders, in which may be kept recipes, grocery bills, whisk brooms or hot dish pads, can be made from ordinary paper picnic plates. Decorated in water colors the holders make very distinct and original bridge prizes. In making the holders, select two plates identical in size and punch holes around the rims. Cut one plate in half and stitch them together with col- ored raffia or strips of leather. If the holder is intended for a whisk broom, provision is made for handle.— Rudolph Shelton, San Diego, Calif. Clothes Pins Form Handy Bath Rack CONVENIENT rack for the bathroom lavatory on LX which the late riser can hang his toothbrush, razor, wash cloth and comb can be made from a length of pine stock and four clothes pins. Cut the rack frame to shape and drill four 5g-inch holes at equal distances so that four clothes pins can be inserted without the necessity of removing the heads. Apply glue and drive them into position. The rack is completed by giving it one or two . FLATTEN OU coats of any good enamel — A. H. Waychoff, Tempe, uU f Ariz. nud 5 Z7 Thimble Aids In Curtain Threading HREADING curtain rods through a narrow hem in a delicate curtain is no easy task at any time and on freshly laundered material is quite difficult, as any house- wife knows. ‘An old sewing thimble, aluminum preferred, is flat- tened in a vise or with a hammer so that the rim of the thimble fans out to permit the thimble to be slipped over the end of the curtain rod. The curtains can then be slipped over the rods with ease.-—E. Macuch, Nashville, 'Tenn. Fly Spray Simplifies Home Ironing EFORE ironing home wash it is, of course, necessary to first dampen the clothing so that it will iron out well. Sprinkling the wash with the usual methods . results in the water wetting only certain areas while the remainder of the material is dry. A sure way to moisten the entire fabric is through the use of a fly sprayer which has first been thoroughly cleaned of all insecticide and then filled with water. Clothing dampened with the fly sprayer will contain a uniform amount of moisture so as to insure perfect ironing.—M. Zallas, Michigan City, Ind. May, 1937 103

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2° HANDRAIL WIRING TO LOCOMOTIVE LADDER LEFT SiDE $ FRÓNT STEPS SEE DETAIL. ais" 16 1 Š BOTH SIDES DUMMY COAL LOAD MANUAL | ^w * CES REVERSE epa 0g E “+. SWITCH : rs s px" ONLY | See ve REAR SKETCH BELOW E p INSIGNIA us. OR NUMERALS TO SUIT COUPLER HANGER d C DRAWBAR LINE THUS | IN WHITE Dimensions for con- structing "Midget Mike's" tender ate given in the above profile body plans. by Hugh Nason N THE March and April issues of MODERN MECHANIX the construction of the motive power unit of “Midget Mike" was described. This tiny 00 gauge locomotive possessed several unique features, the most important one being that it could be constructed from ordinary materials obtainable anywhere. Brass tubing, channel and a few pieces of tin in the hands of a careful craftsman resulted in a powerful locomotive having ample traction to pull loads exceeding fifteen pounds. In this, the final installment, we take up the con- struction of the tender; the reverse mechanism and the wiring detail. The tender is built of wood, brass sheet and odd ends of brass or tin. The floor of the tender is a piece of pine 134” wide, 4&" thick and 3%” long. The sides and rear end are formed from one piece of 26 ga. brass. The whole assembly is graphically shown in Fig. T-1. In fact the accompanying drawings are unusually detailed and clear so that a careful study of them provides adequate instruction for building the tender. However, a few brief notes are added for the further con- venience of the builder. Make a template of the two sides and the back end first. Take the dimensions off the 104 IRD. RAIL, COLLECTOR meere N i: Cou c AA ( On ee Ad eA Zz > .STANDARD 00 GAUGE 1 5" NASON TRUCKS 16 D 4 INCH PROFILE 7^ SIDE STRIP P OPTIONAL TYPE OF HANDRAIL SMALL BRASS SCREW FRONT DETAIL The tender is formed from either sheet tin or brass and mounted on a wooden chassis to which “bought” trucks are attached. Front details are shown here. plans in Fig. T-2 and do not forget to allow for the bend when laying out the template. Scribe the bend lines with pencil to avoid cracking the brass sheet when bending later. Do not use a hammer to form the bend, a mallet is better, and use care to have the job square. Fasten the metal body to the wood floor in the manner shown, filing off the heads of the 19" brass woodscrews clear to the shank after first flowing solder around each screw head so that it reaches the shank. The chassis or underframe is built up as shown. The actual construction of the front steps and front sill may be varied as the builder desires as long as the appearance Shown is retained. The rear end sill is cut out as shown in the details given in Fig. T-3 and Fig. T-1. The length of the drawbar may vary slightly to suit the radius of the curves on the track used. Bend the front plate to shape as shown and solder in place. The coal Modern Mechanix

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compartment back piece is also soldered in but at a slant as shown. The cover of the water tank may be cigar box wood or any 44” material The support posts should be just high enough to bring the cover exactly level with the tender sides when it is placed in position. Allow a slight gap on one side to accommodate the reverse switch lever. 'The tank filler cap serves as a convenient handle to remove the cover when it is desired to get at the reversing unit. Standard Nason 00 gauge trucks are specified. Small brass screws are used to pivot the trucks to the center sill where the cross-bolsters occur. In making the dummy coal load be sure to leave space beneath it for: the several wires which run from tender to locomotive. A hole is likewise drilled in the stort LenetH or 3/8" DIAM. DOWEL - —3- a front plate for the wires to pass through. GLUE TO COVER ` MANNER FASTENING SPRINKLE FINE COAL Q SÍDES TO OVER FILM OF GLUE m m a <p TO OBTAIN EFFECT OF COAL LOAD

BALSA BLOCK

CUT OUT Ti S j EAS Í j E ENO PUNTE | SOLDER AND FILE i HEAD DOWN FLUSH COAL COMPARTMENT ly | A. : BUILD UP STEPS 3 ; BACK PLATE ——J/ err) || j FROM THIN BRASS BRASS. SEE FIG.T-2 d : 7 Mi. anii STRIP OR WIRE FOR SCALE PLANS t à 5 7 :

DRILL FOR HANDRAIL uere i SIDES AND BACK | SINGLE PIECE OF | 26GA. BRASS I

PUSH THIS Oo TANK COVER END INTO H SUPPORTS FLOOR 1 1 5 END SILL-CUT < : | | /OODSCREWS FROM 178" X 1/45 — Mec 1 s 1S SCREWED DIREC LIGHT BRASS WIRE BUILD UP FRONT SILL AND STEPS THUS

MAKE DRAWBAR OF 1/32" BRASS- LENGTH TO SUIT TRACK RADIUS FIG. T-I - COMPONENT PARTS AND ASSEMBLY : This i : e perspective assembly plan shows the components OF THE TENDER BODY p SIDE STRIP used in building the tender and how they are fitted AND CHASSIS FRAME together, Note the additional “collector” on tender,

3/8" BRASS SCREW May, 1937 105

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cur | FIGT-3 LONGITUDINAL out | SEGTION THRU TENDER BACK PIECE,OR COAL COMPT. DIVISION a 2a um G FiGI-4 E SIDE STRIPS- MAKE 2 OF Bex va". PINE. NAIL TO FLOOR. CENTER SILL AMICIS EVUCIIE CROSS PINE BOLSTERS 5 MAKE TWO zum OF 1/4" X 3/16" MATERIAL FURTHER DETAILS OF THE CHASSIS UNDERFRAME PARTS Simple fitting such as ladder and handrails are suggested. Other fittings—dummy air brake cylinder, tool boxes, etc., may be added to suit. With this work completed the loco- motive is ready for painting. To prepare the model for painting, remove the motor and wash the parts with hot water to which “Oakite” has been dissolved. This solution will take off all grease which has gathered on the model. Then rinse in vinegar and put in a warm place to dry. Be careful not to handle the model or the paint will not adhere to the grease from your fingers. To hold the model while painting, wrap the part you are holding with a soft cloth. Now using a good quality flat black enamel, paint the entire engine and tender black except the tires on the drivers, the top of the tender, drive rods, cross head guides, piston rods and valve rods. These parts are painted with aluminum paint. The reverse unit is located in the tender of “Midget Mike.” This device, which is easily 106 YG | Yul v: DA REVERSE MECHANISM TANK COVER 22 _—— R —. SEE CROSS y VOCUM SEEFIG.T-5 H FOR DETAIL 1/8" SQ 12" NoTcH 16 FOR COUPLER PATTERN FOR COAL COMPART- MENT DIVISION 26 GA. BRASS The tender, as this plan makes clear, serves as the housing for the motor re- versing switch which is con- gas cealed by a "dummy" fiber i6THS. 8THS. ONE INCH ——- tank covering. The switch is | "m f described on opposite page. mi constructed, is designed for manual reversing of the engine as shown in Fig. 5. The base is a piece of 34" brass channel 1" long to which one spring brass contact is riveted as shown on the end view. The fiber block which is. used as a base for the other three contacts is a piece of standard i5" by 1⁄4” fiber cut to a length of 14". Cut a groove in the bottom to clear the bottom contact. Drill a No. 43 hole in each side of the channel as shown in the side view. Push the fiber block in place and drill No. 50 and tap 2-56 to match the two holes already drilled. Fasten the block in place with brass 2-56 screws. Now drill three No. 50 holes for the upper contacts and tap 2-56. To make the rotor cut a piece of 45" diameter thin wall brass tube to a length of Cut out as shown in the detail of the Modern Mechanix 9 v 16 *

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rotor, but do not separate the two parts until a 56” length of 14” diameter fiber tube with an 1” hole has been driven into the brass tube and projects slightly at both ends. "Then cut as shown on the plans with a fine hacksaw or jeweler's saw. Note they are cut at opposite ends. Drill a No. 28 hole in each side of the channel as indicated, then insert the %” rod in one side, drive through the rotor and then through the other side of the channer until it projects about 4%”. The other three contacts are now cut of spring brass and are a little more than 4%” wide. Drill a No. 44 hole in each as indicated and fasten to the fiber block with 4%” long 2-56 brass machine screws. A No. 60 hole is drilled in the rotor shaft to take the reversing handle, which is a piece of brass wire soldered in place. Wire the reverse unit according to the diagram given. Solder a strip of brass on the bottom so that it can be screwed to the floor of the tender with brass wood screws. The reverse arm projects up through the slot between the tender side and tank cover.. So that the reversing switch can be grasped easily, bend the end of the arm outward so as to form an “L”? shaped handle. The proper location of this unit is shown in the cross section draw- ings of Fig. T-3. An additional collector is mounted under- neath the chassis of the tender and is identical in construction to the one used on the loco- motive, itself, and described in a previous installment. Wire up the reversing unit to the motor carefully, otherwise your motor will not run in either direction. If difficulty is ex- perienced in connecting the reverse switch, some experimenting will soon reveal the cor- rect hookup required. “Midget Mike” is now complete and ready for hauling its first train. If you are a new convert to this hobby it will, of course, be necessary for you to construct your track layout. Tracks are laid in much the same manner as the conventional railroad rails using brass track and miniature ties. These materials are available from any model.rail- way supply house. A test run with “Midget Mike” will start you on a hobby with endless thrills and one that offers the craftsman with little or much money the maximum from his investment. "MIDGET MIKE" BLUEPRINT PLANS Complete plans for building "Midget Mike" in actual scale size are available in blueprint form at $3.00 per set. The plans are printed on genuine tough rag content blueprint paper to withstand rough workshop usage. Order blueprint No. M-408 from: Modern Mechanix Publ. Co., Greenwich, Conn. FIG.5 DETAILS OF THE HAND REVERSE UNIT AND WIRING DIAGRAM BRASS SCREWS 7&7 32-56 |/8" LONG DRILL FOR ^ LEADS NOTE: SOLDER : WIRES 3€ | AND #4 DIRECT TO MOTOR BRUSHES 9/32" DIAM. THIN WALL BRASS TUBE fg CUT OUT AS SHOWN The electric motor is pur- chased ready made, and wired to the reversing unit lo- cated in the tank. Detailed construction of the switch is described in the diagrams. May, 1937 V4" DIAM. 5" FIBERTUBE '8 1/8" DIAM. HOLE SEPARATE BY SAWING THRU TUBE WALL AFTER INSERTING FIBER TUBE 3RO. RAIL COLLECTOR (TENDER) ; BRASS WIRE (f V8" DIA BRASS ROD

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| Novelty Projects Made With Walnut At right are shown a few of the many inlay and novelty jewelry projects which can be fashioned in the workshop from walnut shells. CUT NUTS ON BAND OR JIG SAW ONE HALF INCH THICK AND SELECT A MATCHED SET IN DESIGN FOR EACH PLATE ge y UST ROUT OUT FOR . A TIGHT FIT. Bii er f iun FORCE EACH NUT IN PLACE WiTH VISE. TURN UNDER HIGH SPEED TO PREVENT CHIPPING OF NUTS. THEN USE A CHUCK TO TURN BACK. fo TO MAK LINKS, WRAP (5 SILVER WIRE V “AROUND ROD ANI $ Bese 6 USE PLASTIC~ i l8 Ars dec ne E2 RE e : CUT SECTIONS UNIFORM ANI GRADUATE IN "size. EARCLASP. The step by step procedure in making walnut inlays and novelty jewelry is described in these illustrations. 108 by Oscar E. Olson HE symmetrical internal design of black walnuts lends itself beautifully to inlay work and novelty jewelry. The hard shell works to a bone-like finish and the lace-like structure, when properly cut, is amply reen- forced to withstand hard usage. For the turned plate inlay work select nuts uniform in size, without weather checks, and cut a cross, Y?" center section, out of each nut on the band or jig saw as indicated in Fig. 1. For each plate, select a matched set of nuts in design, then turn out a piece of 1" stock slightly larger than the desired size of the plate as shown in Fig. 2. In doing this, glue the stock on waste material with a piece of heavy wrapping paper in between, and mount on lathe faceplate. The paper will facilitate separation, preparatory to chuck turning. On the roughed out plate trace each nut separately, as shown in Fig. 3. Do not remove the face plate from the stock until all front turning is completed. Next rout out each nut hole for a very tight fit as Fig. 4 describes. The routing may be done by boring a number of small holes completely through the stock close to the line and then dressing down the sharp protruding edges with a rat-tail file. Follow by soaking the plate in boiling water for a few minutes, one hole at a time, referring to Fig. 5, and force each nut in the stock with a vise as shown in Fig. 6. Do not place the whole plate in the water as the glue holding the stock to waste material willloosen. In this operation the wood should be soaked suf- ficiently to allow the jagged corners of the nut to squeeze in smoothly without cracking the stock. Glue can be placed on the nut before forcing in, but this should not be necessary. [Continued om page 128] Modern Mechanix

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HEN a suitable potentiometer or rheostat for an electrical experiment is not available a prac- tical makeshift device can be con- structed from an ordinary hard lead pencil. The pencil is split in half so as to expose the graphite writing element commonly referred to as lead. Secure three fahnestock clips and mount them on a block of wood in the manner shown in the accompanying illus- trations then clip the pencil under them so that the lead contacts the metal. From a length of spring brass or stiff copper form a sliding contact arm. Drill two holes in the strip; one for the knob and another for the pivot screw. Mount the arm in position and the potentiometer is completed. If the resistance of the device is not sufficient it can be raised by filing down the surface of the lead. ZCLOSED—USE CLIP _ TO CONTROL. CIR- CUIT PAPER UNDER BRUSHES SOFT IRON FILLERS PROD TO TEST 9 CONTINUITY — 7 (STEEL) Open windings and short circuits in small electric motors can be traced with a door buzzer using method shown here. Paper strips ate slipped under brushes and soft iron strips inserted in air gaps. With buzzer connected motor vibrates like growler. May, 1937 ADIO SPARKS Novel POTENTIOMETER Made From Lead Pencil HB OR HARDER LEAD PENCIL 3 GRAPHI (LEAD) WOOD BASE An ordinary hard lead pencil forms the resistance element for this novel emergency potentiometer. Split the wood through the center so that the lead is exposed and mount pencil under fahnestock clips as shown. A brass contact arm slides over the lead to provide any desired resistance. Buzzer Tests Motor Windings HILE the usual method employed to trace defects in small D.C. motors is to take the motor apart, a practical test of the field and armature can be made with the motor in its assembled state. An inexpensive door buzzer comprises the testing equipment and is connected to the storage battery in the usual way when making the continuity test of the field coils. To test the field attach the prods across each winding. If the buzzer functions the coil is satisfactory; if not, the coil is open. : In making an armature check-up, lift up the brushes and insert a piece of paper under them so as to provide complete insulation. Next place a strip of iron in the space between the armature core and each pole face and con- nect the buzzer across the brushes. Connected to the battery the motor armature functions as a growler if it is in good condition. 109

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OR the rural listener who does not have access to city current nothing is quite as annoying as the constant difficulties experi- enced with early battery receivers suddenly going dead in the middle of a program. Ancient circuits and faulty tubes, subject to Wiring 5-tube rural receiver Á from this pictorial plan makes | it extremely easy to construct. Chassis measures 10”x10”x3”. Sy 110 ay y P 7 » BATTERY OPERATES Rural fans no longer need be without a modern metal tube radio. A single battery supplies current. microphonic noises, are responsible for much of the trouble and a new set of batteries every week will do little to improve or insure re- ception. With the advent of the vibrator B power supply the farm receiver procured a new lease on life, for the unit : made it possible to employ modern circuit WAVE CHANGE designs in these sets. COIL ASSEMBLY CC Cul BW f R2 TONE CONTROL SOL WITH SWITCH <a ET EM

INDICATES -L- - CONNECTION TO CHASSIS Modern Mechanix

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ALL-WAVE FARM SET by H. L. Warner The vibrator device is a unique apparatus that converts 6 or 32-volt direct current into alter- nating so that it can be increased to any desired voltage by feeding it into a power step-up transformer and rectifying it in the same manner as the current used in electric receivers operating on city current. In designing this modern all-wave rural receiver only parts which could be obtained at any radio supply house were selected. These were arranged into an ingenious circuit which employs five metal tubes and provides maximum efficiency. A wave switch of simple design permits rapid tuning from long wave to short with ample volume on both European MAGNETIC SPEAKER CONNECT TO 6 VOLT \ STORAGE BATTERY PLUG-IN — VIBRATOR Converting 6-volt battery current into high voltage, for operating radio, this B power unit completely eliminates use of B and C batteries formerly used. May, 1937 Shown in this drawing are the receiver, permanent dy- namic speaker and B power unit. Complete set can be in- stalled in a console cabinet. and American broadcasts. In addition to the all-wave tuning this set features a tone control and permanent dynamic speaker, neither of which are found on the obsolete farm set. To start actual construction on the set first form the chassis from a sheet of aluminum or electralloy so that when bent to shape it measures 10" by 10" by 3". Before bending the chassis to shape holes for sockets should be cut in the top with a fly cutter using the template diagram as a guide. With the various holes completed, start - assembling the receiver’s components in their respective positions inside the chassis. Mount the five octal 8-prong tube sockets first; next the tuning coil assembly, switch inside, coils on top of chassis and last install the 3-gang tuning condenser. All parts are fastened to the chassis with 6/32 brass machine screws and hex nuts to match. Bolt all parts securely so that there is no chance for them to work loose. Since all resistors and condensers used in this set are provided with “pigtail” leads a considerable amount of wiring is eliminated by sliding insulating spaghetti tubing over these leads and soldering them directly into 11

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TUNER CHASSIS Receiver and power unit chassis are cut according to these templates. Wind RFC-2 in power unit as shown. The schematic circuit of the metal tube rural receiver provides an accurate check on the builder's wiring if pictorial plan is followed. Parts are indicated in box. 112 40 TURNS O NO. 16 ENAMEL their respective places. All resistances are of the carbon type and rated at 1 watt. Tubular fixed condensers are all rated at 400 volts except the two .25 mfd. which are rated at 200 volts and the 10 and 25 mfd. which are rated at 35. The latter two condensers are eleetrolyties. Wire up the receiver with care making sure that all connections are soldered to the right places. Following the pictorial diagram | will simplify the wiring up of the receiver to a considerable extent. Shielded cables are required in several parts of the circuit. The lead from the center terminal of the volume control to the cap of the 6Q7 tube should be enclosed in a shielded covering and the shield grounded to the receiver chassis. Cables connecting the vibrator power supply to the set are also enclosed in a shield which is grounded to the chassis of set and power supply. After completing the wiring of the set form the chassis for the B power supply unit and assemble the various parts used in its construc- tion by following the pictorial dia- gram. Transformer, electrolytic condensers, vibrator and rectifier tube are all standard parts, there- fore there will be no diffieulty in ere Lev RIO CHASSIS PARTS VALUES Cl,C2,C3—3 GANG .00037 MFD. TUNING CONDENSER €4—.0001 MFD. MICA CONDENSER 65 —.00025 MFD. MICA CONDENSER cé6— gere MFD. MICA CONDENSER C7~.02 MFD. 400 VOLT PAPER CONDENSER iem F MFD. 400 VOLT PAren SOMDENSER 5 MFD. 200 VOLT PAPER CONDE! Soe [y MFO. 38 VOLT ELECTROLYTIC ONBENSER Cll—.} MFO. 400 VOLT PAPER CONDE! oec 25 MFD. v Mone Agere et CONDENSER — 500,000 0! RESISTI Re- 100,000 OHM tone” CONTROL POTENTIOMETER R3— E29 OHM 1/2 WATT RESISTOR R4- O OHM 1/4 WATT RESISTOR R5-— 25,000 OHM ue WAT RESISTOR R6— 25,000 OHM ATT RESISTOR R7— 40,000 OHM H MATT RESISTOR R8— 3,000 OHM 1⁄4 WATT RESIST R9- 500,000 OHM VOLUME CONTROL POTENTIOMETER 10- 500 0} | WATT RESISTOR Ril— 20,000 OHM i/2 WATT RESISTOR R2- | MEGOHM 1/4 WATT Besson - ,000 OHM 1/4 WATT ISTOR TI = IRON CORE 1.F. TRANSFO! AMER 456 KC IST STAGE T2- IRON CORE LF. TRA SERM 456 KC 2ND STAGE 4 3 PL~ PILOT LIGHT 6.3 VOLT Modern Mechanix

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purchasing them. Three tube sockets are mounted on the recti- fier chassis for connecting the receiver cable, rectifier tube and vibrator unit. Mount these parts with machine screws in the same manner as the set components installing lock washers under the hex nuts to pre- vent parts working loose from the vibration of the transformer and vibrator. After wiring the B power supply connect a shielded battery cable, such as used in auto- mobile receivers and fitted with a built-in fuse, to a six-volt storage battery. Connect thereceivercable plug in the side of the power unit and the all-wave receiver is ready for its first test.- Unless your all-wave coil assembly is sup- plied with a matched gang condenser it will be necessary to have the completed set balanced with an oscillator. If the builder does not own this instrument he can have the work done by a local radio serviceman atasmallcharge. After the receiver has been balanced correctly it is ready for use. Con- nect an antenna of not more than 75 feet in length to the antenna post and a good ground connection to the ground post. The tubes will require a few seconds to heat up before re- ception can be obtained after which either broadcast, police or foreign stations can be tuned in with a single dial control and the snap of a switch. The tone control permits the permanent dynamic speaker to respond to all tone ranges just like any other modern receiver. NS 8" MAGNETIC SPEAKER GROUND TO CHA‘ HASSIS 6. PRONG 4 PRONG PLUG AND SOCKET May, 1937 - + 6 VOLT BATTERY The simplicity of the wiring up of the receiver is indicated in this photograph showing a bottom view of the all-wave receiver and B vibrator power unit. Although only five tubes are employed in the circuit of this receiver their modern con- struction and high efficiency results in more than enough volume for home requirements. In many localities powerful European sta- tions can be tuned-in with the volume of local broadcasters. Interesting police, airplane and amateur broadcasts can be tuned in at any time to provide new thrills in radio re- ception. The finished set can be installed in a console cabinet making it an attractive decoration and luxury for any rural home. The set can be operated at no cost by attaching a wind- charger to the storage battery. Plans for building an efficient windcharger plant are available from Modern Mechanix Blueprint Dept., Greenwich, Conn., at 50c. The schematic circuit of the B power supply is shown here along with a list of materials required. RFC-2 is homemade and consists of 40 turns of No. 16 enameled wire, layer wound, to fill a 44” by 2" spool or fiber tube. PARTS VALUES Clá- CiS = CI6 — .02 MFD. 600 VOLT PAPER CONDENSER CI7 —- .O1 MFD. 16 MFO. 500 voLT ELECTROLYTIC CONDENSER BMFD. Cl8— .5 MFD. '400 vour " " RFC | — 30 MH CHOKE CH.3 — 30 HENRY FILTER CHOKE T3- 6 VOLT POWER TRANSFORMER 113

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Build This Automatic Washer For Film and Print Developing Here is the completed automatic washing tank. Water flowing through the copper tubing pro- vides rotating water circulation. by R. T. Moore ASHING prints and films properly can be one of the “messiest” of tasks, especially when you have a great many to make at a time, but with the proper facility this becomes no task = : at all and proper washing is assured. The washer shown here is easy to construct and its entire cost should not exceed two dollars. First, two pieces of heavy galvanized iron 1414" long, 144%” wide are required for the sides and one piece 9" wide and 35" long is required for the ends and bottom. Lay out the largest semi-circle possible on the sides and eut these out with curved tin snips. Mark out a 4” margin around these pieces and using a flat iron and a hammer form a rim around these pieces. Now shape the long piece inside of this rim around one of the sides and solder it in place, spot it in place first, then solder SOLDER both inside and out. Solder the other side DRAIN COCK piece in place in similar fashion. Form four angles from DOUBLE galvanized as shown, two of these 14” long and two 10%” long and solder to the top of the tank. Cut the tank pieces from No. 18 galvanized iron. Bending over the edges of side pieces, as shown at right, and solder. OUTLET This perspective diagram shows the construction of > x the washing tank. „Galvanized iron is used, for the A piece of 14" copper tubing about 12" long tank construction. eta aps over the inlet pipes : act as deflectors so that. the prints revolve freely. [Continued on page 124] 114

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attention on various fishing vests and jackets. Those without arms give one the best of free arm movement. When furnished in lightweight mate- rial, even suede cloth or the lightest flexible leather, they are something to think twice about before dismissing once. Such fishing vests have pockets for the dry fly oil, for the leader box, for the pipe and tobacco and other small items. Where a vest or coat is stiff in material all these knick- knacks cluster one up. They are not so keenly felt in the vest or coat that comes in a soft, flexible material. As to whether a cap or a hat is to be used depends much upon the fisherman. A cap offers but little protection against the rain, while a hat sheds tle same with comparative ease. A soft felt hat with a drop brim is probably the best of all. The eyes are really properly shaded under a brim of the sort, affording one the opportunity of observing the movements of the fly or the activities on the stream with ease and clearness. Some fishermen are in the habit of taking along a sou'wester to be used on the head in case of rain. It is not a bad idea, Fitted out with a rain cape or pull-over and a sou'wester one can fish right on through the rain. The fact that some of the finest trout come into action when it rains, knowing, as they do, that insects, worms, etc. are washed into the stream, to fish at such times is one of the safest rules to follow. While it is possible to carry the trout you catch in a flour sack at your belt or thrust the same away in the back of your hunting coat, the fact remains that a creel is really a blessing of no mean order. The regulation type willow creel answers to the purpose, and is to be desired as against the type of canvas creel sometimes used. The latter has very little to recommend it, and has but little sale. Do not buy a creel that is too small. The 15 or 20-pound size is about as small as one should go. They may be had either plain or brown stained and leather bound, splendid looking affairs. The latter is recommended. They cost a trifle more, but are worth it. Some creels are fitted out with bait boxes on their cover, and & lift lid revealing à compartment where flies, spinners and leaders may be lodged. Such creels are an absolute boon. A short-handled landing net is the usual re- quirement in average trout fishing. The collap- sible type of net, which may be knocked down and put up in a canvas slip when transported, is a recommendation. To the tip of the handle of this net an elastic cord is connected, making it possible to throw the same over the shoulder and stretch the same to round in the fish. Where one is fishing a large stream and large trout are likely to be met with, the same type of net with a two- foot handle is a recommendation. A net of the sort [Continued on page 128] -YOU TOO BRIGHT! IF YOU'VE GOT HICKIES YOU OUGHTA EAT FLEISCHMANN'S YEAST- 3 CAKES EVERY DAY WILL CHASE “EM - AN' THATS A FACT! Za 7 GET THIS FREE FLEISCHMANN DANCE CARD FROM YOUR GROCER TODAY! Boys! Girls! Here’s how you can get a copy of ARTHUR MURRAY'S exciting dance book! Itis NOT FOR SALE. The only way to get your copy is with Fleischmann Yeast labels! Paste these on FREE Fleischmann Dance Card your grocer will give you. Send it in. JIf your grocer has no Dance Cards, you can get the book by pasting the 81 labels on paper, or put- ting them in an envelope, and sending with your name and address to Fleischmann's Yeast, 701 Washington St., N. Y. C. (This offer holds good un- til August 31st, 1937.) (Details of securing Dance Book differ slightly in states ^ West of Denver and in Canada, sce newspapers or ask your local grocer.) When Answering Advertisements Please Mention May Modern Mechanix 3 CAKES OF ' OH BOY-LOOK-THIS TELLS HOW. | FLEISCHMANN] TO GET A BOOK OF DANCE : YEAST, PLEASE / LESSONS BY ARTHUR MURRAY- = JUST BY SAVING YEAST CAKE LABELS AND PASTING THEM Jt E 7 Dr. R. E. Lee, well-known physician, says: ‘‘Eat Fleischmann’s Yeast if you want to help clear up ADOLESCENT PIMPLES.” @ During adolescence important glands develop. The whole body is disturbed. The skin gets oversensitive. Waste poi- sons in the blood irritate this sensitive skin—pimples break out! Fleischmann's Yeast helps to clear up pimples by clearing these skin irritants out of the blood. Eat 3 cakes daily—plain, or in water—about 4 hour be- fore meals. Copyright, 1937, Standard Brands Incorporated 117

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"Is" Of The Titanic Tragedy (Continued from page 76] mishap. There were only a few passengers on deck. There had been no boat drill since the vessel had sailed; had there been, it would have revealed the amazing and terrible fact that there were only 16 boats with a total capacity of 53 per cent of those on board. None of the passen- gers seemed to be aware of the boat shortage. Several books by survivors tell in detail what happened about the decks and in the boats. The men stood back quietly; the unanimous reports of credible survivors, officers as well as passengers, were that discipline was kept. Despite sensational yarns to the contrary, there was no panic, no rushes for the boats, or “harrowing scenes.” The men stepped aside and calmly conversed or smoked. One of the many tragic phases of this great disaster is that most of the first boats went away half loaded. Officers could not induce the women to leave in them! Most of the women re- fused point blank to enter the boats. “Leave their menfolk?”—leave the big, safe, and warm ship— get into those frail boats and make the long and apparently perilous descent to the cold Atlantic? “Well, hardly!” Some even stopped to question the officers, or to argue with them. Others, like the elderly Mrs. Straus, refused to leave their husbands. There were numerous instances of heroic re- straint and of chivalrous conduct on the part of the men. That only five first class women and children were lost speaks eloquently enough for the magnificent discipline of the first and second class men. : No. 7 was the first boat to be lowered. It went over at 12:45 a. m. with only 27 people—its capacity was 65. No. 1 pulled away with 12; it could have held 40. When some boats ran short of women, men were put in; but when other ‘women appeared, they immediately got out again. Colonel John Jacob Astor placed his young bride in a boat and stepped back to rejoin the men. He lit a cigarette. Colonel Astor went down, his bride lived. Wealth, social position, or public prominence did not count. Men in the world of arts and affairs stood back; an elderly German immigrant woman, a slip of a girl, or a child, stepped into the boat. Sex and age were the sole determinants. There were a number of page and elevator boys who, as juveniles, could have en- tered the boats; they never approached them— they were men, and members of the crew! Even with the lowering of the boats most of the passengers thought there could be very little likelihood of the Titanic foundering. They re- garded the launching and sending away of the boats only as a safety precaution. A passenger who had smashed in a jammed door to release an imprisoned man, was warned by an outraged steward, who came up at that moment, that his damage to company property would mean his arrest when the ship docked at New York! 118 Word came at 12:33 a. m. that the Carpathia was on the way and would arrive in four hours. This, too, helped to allay anxiety over the ship's con- dition. At this time the eight immortal musicians took their places on the promenade deck and began playing rag-time music. They played lively tunes until a few minutes before the end. Their last piece was "Autumn," a Church of England hymn, and not "Nearer, My God to Thee" as has been reported. Not one of the musicians was saved; their heroism is perpetuated by a memo- rial tablet in the Public Library at Southampton, England. Three American and two British mail clerks carried every sack of their registered mail up from the flooded mail room to an upper deck. They might have spared themselves the labor of dragging more than 200 heavy sacks of mail up several decks; not a sack of it was saved. The clerks were last seen standing guard over their mail. Like the engineers and the musicians, they perished to a man. Most of the fires in the forward boiler rooms were drawn by midnight. The two forward com- partments were then completely flooded. The engineers switched in emergency dynamos, well above the water line, for lights, pumps, and the wireless. All engineers, including those off watch and a number of non-marine guarantee men making the trip to observe the new «apparatus, were below. Not one was ever seen on deck. They dragged great sections of piping through rapidly filling compartments to forward boiler rooms, vainly attempting to keep down the rising tide. They pumped out thousands of tons of water; their efforts undoubtedly prolonged the life of the ship. One hundred and twenty-two feet below the boat-deck, far below the water line, totally ignorant of what was going on above them, they carried on, knowing that their chances of escape from the depths of their steel compart- ments would be exceedingly remote. They had no false hopes to buoy them, nor could they be ignorant of the ship's actual condition and waning life. At 1:40 a. m. the firemen were ordered out, but the engineers stayed. Andrews, the builder, Bell, the chief engineer and 35 licensed engineers toiled on. While they worked there would be lights for the more fortunate ones up on the boat deck and there would be power for the wireless. Every ton of water they were able to pump back overboard prolonged the life of the Titanic a little; it per- mitted others to get away in the boats; they might even keep her afloat until a rescuer arrived. Not one of these men were saved. A beautiful and inspiring monument in Southampton immortalizes their -deathless heroism. Andrews was last seen helping an aged deck steward lash together deck chairs and throw [Continued on page 120]

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PRESSURE—600 lbs. per sq. 1n! TEMPERATURE—3000 degrees! = na rss but FORD GASKETS pier are built to take it Each explosion inside a Ford V-8 combustion chamber may exert a: pressure of as much as 600 pounds per square inch. The flames from the burning gases reach temperatures as high as 3000 degrees. At such temperatures and pres- sures, a lot depends upon gaskets. They must keep these hot gases from leaking into the water jackets. They must keep the jacket water from entering the combustion chambers. They must provide as effective a seal between head and block as the metal of these parts themselves. Genuine Ford Cylinder Head Gaskets are built to give long, dependable service under these severe conditions. A steel core is permanently bonded between two thicknesses. of specially treated asbestos that resists the effects of water, gasoline and oil. Combustion chamber openings are reinforced with a steel edging for protection against blowing out. And correct compression in the cylinder heads is assured because Genuine Ford V-8 Cylinder Head Gaskets compress to the correct thickness (.048 to .051 inch). As with all Genuine Ford Parts, Ford Gaskets are made of the highest quality materials. Insist upon Genuine Ford Parts when replacements are needed. "These rolls clinch the two asbestos Sheets to steel core. FORD MOTOR COMPANY, DEARBORN, MICHIGAN Ru Putting grom- mets on combus- tion chamber openings, Ford V-8 Gaskets. Sizing Ford V-8 Gaskets to correct thickness. When Answering Advertisements Please Mention May Modern Mechanix 119

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"Ifs" Of The Titanic Tragedy [Continued from page 118] them overboard in the hope that they might save some struggling victim in the water when the ship went down. The great vessel he had created was dying; the pride of his life’s work would never reach her first port; there was nothing more that he could do even to lengthen her last few mo- ments; still there was work to do, lives must be saved, and so Andrews, builder of the Titanic, busied himself to the end. After Captain Smith had told the radiomen that the Titanic could not last more than a half hour, Bride had gone to their adjoining room and got their money, clothes, and lifebelts. Both dressed as warmly as they could. Phillips returned to his key and sent another SOS. At this point, Captain Smith came in for the last time and said: “Men, you have done your full duty; you can do no more. Abandon your post. Now it is every man for himself.” With a 46,000-ton ship sinking under his feet and with 1,500 human beings still unprovided for, Smith remained a calm and noble figure to the end. All through this disaster one stands im- pressed by the magnificent discipline and the orderly procedure which adds glory to the sorrow of this tragedy. Phillips continued working another 10 to 15 minutes. With a steady, unhurried hand, he was answering the operator of the Olympic, who ad- vised him, “Lighting up all possible boilers as fast as we can.” In a quiet voice he asked Bride if all the boats were gone. Bride went out on deck— the last boat had left a half hour before. The sea was lapping over the forward end of the boat deck, normally 60 feet above the water line. He rushed back to the radio room and shouted to Phillips, "Let's clear out!" Phillips sent his last message: “Come quick, our engine room flooded up to the boilers!” It was two o'clock, They had prepared candles and were ready to shift to their emergency transmitter if necessary. But they had full power and lights to the end. s l Bride says that he saw Phillips walk aft across the tilting deck toward the unsubmerged, high, after end of the ship. It was the last he saw of his chief. On top of the Marconi house some men were struggling to get a collapsible boat over. “They were having an awful time. It was the last raft left. I looked at it longingly for a few moments, then I gave a hand, and over she went. She landed in the water upside down. It was not much of a drop into the water, the icy Atlantic was already swishing over the very top deck forward.” Bride clung to the boat for what seemed three- quarters of an hour until a friendly hand pulled him aboard. This was the same raft which saved Colonel Gracie, who survived the disaster only a few months. The giant ship sank lower and lower by the 120 head until she stood almost perpendicular to the water, her stern and propellers high out of the sea. Still all the lights burned brightly. The forward stack fell over, creating the erroneous impression, to huddled survivors in the boats, that she had broken in two. The lights went out with dramatic suddenness, flashed on again for a second and then went out forever. Still that great, monstrous, black finger of steel pointed straight up into the starry sky. Then across the quiet water those shivering in the boats heard a tremendous roar, a hellish din, as every- thing within the ship, including the heavy machinery, torn loose from its beds, crashed downward through the bulkheads toward the submerged bow. The roar lasted for several seconds and was followed by deep silence. The Titanic was then perpendicular to the water; gently and almost imperceptibly she slid into the depths. There was no appreciable suction and hardly any surface wash. The "unsinkable" ship was gone. The time was 2:20 a. m., April 15, 1912. Then followed the most gruesome scene of the tragedy. Hundreds of voices: men, women and children in the agony of death in the icy waters, were crying piteously for help that was not to be had. Cruelly the cold, the distant stars, and the silent black sky threw back their hopeless pleas. Those in the boats were horror-struck; it had never occurred to anyone that there were in- sufficient boats or that a single person would be left on the ship. They heard but dared not help. Most of the half-empty boats were too far away; those nearby were loaded to the limits of safety; to venture among the struggling hundreds in the water would be suicidal. The occupants of the boats were stupefied; cold and frightened. So haunting and harrowing were the cries that some of the boats rowed farther away to escape the ghastly screams or they, the living, tried to sing to drown them! The last despairing cries died away 40 minutes after the disappearance of the Titanic; the intense cold of the ice-chilled water had killed them. Several days later a “morgue ship" cruising over the Banks, picked up several hundred bodies, only one of which showed signs of having been drowned. The life-jackets, which held them up and made them look like flocks of white gulls at rest on the sea, had saved them from drowning, to die of exposure. They had all died of the cold. Not one, it must be added, was found with any bullet wound, giving lie to sensation mongers. There had been no "rushes by fear-crazed immi- grants," or "officers firing into frenzied mobs." Likewise there was no truth in the report that Chief Officer Murdoch had committed suicide. While boat after boat had been lowered with first and second class passengers, the third class passengers, largely immigrant, separated by many [Continued on page 122]

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Out of the Gale Came Cries of Men Fishermen Blown to Sea in Sinking Boat Saved as Mate Checks Strange Light “Two days and two nights we were out there drifting helpless in the gale, and all { the while we pumped to keep afloat," write William. Neher of New York and Warren Brown of Beverly, Mass. “Time and again we'd sight a ship during the day, but couldn't make them see us. They'd go on by...leav- ing us to pump again...and put off drowning a little longer. "But the second night, we figure our pumping is about over, our hands are so swollen we can hardly grip the pump handle, our backs ache like toothache, and we're beginning not to care much, when way off A come the pin points of steamer lights. For hours, as those lights came near- er we signalled with our flashlight and when there was a chance of hearing 1 WANT A FLASHLIGHT AND FRESH DATED “EVEREADY BATTERIES FOR THE CAR... BUT PLEASE TELL ME WHY FRESHNESS IS SO IMPORTANT When Answering Advertisements Please Mention May Modern Mechanix “EVEREADY”? «(mH ARE FRESH BATTERIES The DATE-LINE guarantees FRESHNESS NATIONAL CARBON CoO., INC. 30 East 42nd Street, New York, N.Y. us through the gale, we yelled like wild Indians. “We owe our lives to Third Mate Charles Guy of this ship, the Tanker A.S. Hansen of the Sabine Transportation Co., Inc., and to the fresh DATED ‘Eveready’ batteries in our flashlight. For it was the light that attracted Mr. Guy, and made him change his course. Soaked by the storm, in use hour after hour, those DATED ‘Eveready’ batteries lived up to their reputation. If they hadn't we'd be down below there now with (Sigue ^ Aer. Warren S) Aen" BATTERIES Davy Jones. WELL, SEE MOISTURE 1S PUT INTO ALL BATTERIES TO MAKE THEM WORK... IF THEY ARE ALLOWED TO, DRY OUT ON A DEALERS SHELF, THEIR LIFE IS GRADUALLY SHORTENED, THATS WHY THE"EVEREADY"' DATE-LINE GUARANTEES LONG SERVICE.

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“Tis” Of The Titanic Tragedy [Continued from page 120] decks and strange passageways from the lifeboats, waited like frightened, dumb cattle. Many of these helpless people died as nobly in their be- wilderment and fear as the gentlemen of the first class, calmly chatting and smoking. In the boats, Gracie said, “Our hopes were buoyed with the information imparted through the ship’s officers that there had been an ex- change of wireless messages with passing ships; one of which was certainly coming to our rescue.” At 2:35 a. m., Captain Rostron, surrounded by his officers, all peering into the darkness ahead, keen to avoid a fate similar to that of the Titanic, saw a green light, She was still afloat! An hour later they were almost up to the position but the light was low in the water; it was only a boat burning the White Star Line’s green night flare. The reflected gleam of a star revealed an iceberg ED ossdiveriisutardilcmend dead ahead. It was a close call; Rostron had to .use and target shooting! MORE AC. © alter course quickly several times to dodge bergs D IPIE Eo niaes Galle of some COM The Carpathia stopped at 4 a. m. Ten minutes ponents n SUPER-MATCH, the ape later they took aboard the first load of survivors, non ie Pio ibus and Lores 25 from a boat which could have held 50. The E e A a et he confirmed Rostron's fest. ile Titanic had gone T 3 " e e t ear—the Titanic had gone erto stock XRPERT:22/Sl Mail Coupon down! They were an hour and a half too late! Daylight paled the east at 4:30 o'clock and facilitated the recovery of other boats. Rostron sent an officer aloft to count the icebergs. They were surrounded by bergs and masses of field ice as far as the eye could see. They continued picking up boats. A bright morning sun gilded and tinted the bergs; the sea smiled pleasantly. It seemed impossible that 1,500 human beings had died in this quiet place only a few hours before. The survivors came aboard quietly with no hysteria and with very little excitement until the in MUSHROOMS last boat was picked up at 7:30 a. m. A careful Grow Mushrooms in cellar or shed. count revealed 712 rescued. Only then did the with AMI seleeted-spore spawn and ü E step-by-step, easy-to-follow Manual awful realization sweep through the crowd of A fine time to start Book feo survivors that there were no more, and that there Ay —write today! was little or no hope for the hundreds of missing husbands, wives, children, and kin, or for the gallant crew. Of a score of honeymoon couples only widows and one bridegroom survived. Two infants survived a father whose name they could nct even lisp. He had handed them into a boat and stepped back with the men. The irony of “women and children first” stood tragically re- vealed in the person of an elderly German immi- CEER Cartridge Company, Dept. E-105, East Alton, Illinois. Send, FREE, the new Western Ammunition Handbook —a complete guide to modern shooting that telis all about the new Xpert .22's. La mm MÀ a —À —Á—À | Industries Read., Dépt. 106, Toronto, Ont. machines co: 14 . elds all metals and alloys from heavy motor block” and castings to fenders and light sheet metal. Also fine for soldering and brazing. Fully uarantced. Approved dy Automotive Tesi Laboratories. Eas portable on casters. WORKS FROM 110-V SOCKET. Simply | plug into 110-Volt or 290-Volt light socket— costs only few pennies an hour to use. Has complote heat controls, Anyone can Tull s FREE! Write Ineluded. COMMONWEALTH MFG. CORP., Dept. U- 52 4208 Davis Lane Cincinnati. Ohio ES grant woman. She had lost her two sons, all she had in the world. One of them had carried their money in a money-belt as they were bound for America to begin life anew. We must now set down. in more detail, the story of the “ship-that-might-have-saved-all,” the SS Celifornian. Here is a story stranger than fiction and almost past belief. Captain Lord, after his ship had been stopped by ice, asked Evans, his [Continued on page 135] 122 Accept No Substitutes! Always Insist on the Advertised Brand!

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Train at Home--- r GOOD PAY. Under Factory Engineers Spare- ime and Full-Time Jobs “RADIO APPOINTED BY RADIO MANUFACTURERS TO SUPERVISE R-T-| TRAINING This is the R- T-I Advisory Board and large Radio firms—appointed by these firms to supervise and direct —Engineers RAY D. SMITH, President R-T-l, who has directed training of 100,000 men. Read whata few students, say. * Made my first spare time money after fin- ishing four lessons. Over $500 spare time money In 10 months. R-T-I Is O. K.” Delmer Grote, Route 5, Greenville, Ohio * k g “I made $14.25 in frst 11 days of my training following your instructions,” C. E. Head, 431 Third St., Alexandria, La. »o» ok “Before finishing my training I was made Manager of a Depart- ment Store’s radio Section.'" Howard N. Lentz, 123 W. Alexander Sta Buchanan, Mich, a è A “My job paid me $18 a week before taking your training. Shortly after starting was averaging $60 a week. Have made as high as $250 in single week.” Wm. T. Ridd, 3452 Evelyn Sti., Verdun, P. Q., Canada. RADIO AND TELEVISION INSTITUTE Dept. 35 . Put your future 50 great radio now endorse this R-T-I Training. in their hands. manufacturers Training. Executives of Trained Men Needed in All Branches Tf you're dissatisfled with stall pay—lay-offs and an uncertain future —here's an opportunity that's too good to m At the cost of only the time it takes you to mall the coupon, you can get my big FREE book, “RADIO'S FUTURE AND YOUR OPPORTUNITY." This book tells how you ean learn at home under the supervision of factory engineers, to make more mcncey a’mes? at once in Radio—whether you want to make Radio your life's work, or use it to pick up an extra $5 to $20 a we.k in your spare time, More Opportunities Than Ever Before Radio is still forging ahead. 1936 beats all other years. Over 6 million new sets sold. Over 30 million dollars paid for service alone this year. Where only a few hundred men Were employed a short time ago, thousands are employed today. And where a hundred johs paid up to $75 a week—there are thousands of such jobs today—many paying even more. And new jobs are being created all the time— full time Jobs and spare time Jobs. Gei my book and see how easy it is to learn at home for this good-pay work. “Shop Training" for the Home Tt-T-I Training is different than any training you ever heard about, It comes to you right from the heart of the Radio Industry—right out of the factories where Radlo sets und other vacuum-tube devices are made. It was planned and prepared and is supervised by big radio engineers IN these factories—by men appointed for the Purpos”. This means that trained the H-T-I way, you'll be trained as the Radio Industry wants you tralned—just as the Radio Industry, itseif, would train you if it was doing the job. Television, Photo Electric Cells, Public Address Systems Included Radio Servico work is only the starting point in R-T-I Training. From there it will take you through the whole fleld of Radio and Electronics. You will learn about every new development, including "Television so you'll be ready when Television breaks, You'll also learn the big money subjects such as Aviation and Auto Radio; Publie Address Systems; how to handle Photo Cells; Sound Pieture Recording, Ete. 4 Working Outfits Furnished Start almost at once doing part (ime radio work. J furnish 4 outfits of apparatus that you build into test eguipment with which you can do actual jobs and earn extra money. My ‘Training pays its own way and you get your money back if not satisfied. Age or Lack of Experience No Handicap You don't have to be a high school graduate, nor even have finished the grades. My Training is so simple, easy, and practical, that the average man, regardless of age, education, or previous experience ean master it. It offers the chance you have wanted to get out of a small-pay, no-future job, into good pay work with a future, in Radio and all its branches. Get My Free Bock INVESTIGATE! Learn why R-T-I Training is different, Find out why R-T-I Trained men get "Quick Results” and “Big Results.” Send for your copy of “Radio's Future and Your Opportunity" to- day. It tells you about Radio's amazing opportunities. It describes my approved traiulng. Jt tells what R. T. I. students are doing and making. It gives the names of my Advisory Board and 30 endor-ing manufacturers. It's FREE. Clip, sign and mail coupon RIGHT NOWI RAY D. SMITH, President PRACTICAL SHOP TRAINING “FOR THE HOME E 2130 Lawrence Avenue e CHICAGO When Answering Advertisements Please Mention May "e TO EARN kis O° 754 WEEK (MANY R-T-] TRAINED MEN EARN MORE) MAIL COUPON BELOW Big Money in Auto í and Police Radio Work W. H. Carr, 402 N. 16th St., Kansas Clty, Kane sas, an R. T. I. student, has "charge of 35 radio equipped cars for the Kansas CI d lice and Fire Departments, His salary is OO a month and he is furnished with an RAA gas, oil, ete. He says, "'If I had not taken vour course Y would not be able to hold thls job." Makes $600 in One Month Herbert B. Thomson. Gorman, Texas, formerly an oil well driller, borrowed $170.00 to start a Spare time radio business after completing 12 R-T-I lessons. He made money from the start. ln two years his shop was worth $3500. He Says, "Because of my R-T-I Training I made $450 In September and over $600 in October, 1935. It pays to be R-T-l Trained.” MAIL FOR FREE BOOK Ray D. Smith, President, RADIO AND TELEVISION INSTITUTE (R-T-D, 2130 Lawrence Ave., Dept. 35, Chicago, II. Without obligatlon, send me a copy of ''Radlo's Future and Your Opportunity.” Y am interested in your training and the op- portunities In the great ficld of Radlo for tne R-T-I Trained Man. Address City --2 ewe enn ene en a Stale nems 123 Modern Mechanix

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EASY TO BUILD ANS - TREE! | New Clas "PLOVER" Desk with concealed typewriter Sailboat—one of a series of | drawer—oneof 8 associated mod- watercraft projectsdesigened ern living-room pieces by Gilbert by William Crosby, Editor Robde, internationally famous of “Rudder” Magazine. furniture designer, @ Twenty-four ofthe finest projects ever offered to homecrafters: kayak, surfboard, inlaid card table, Colonial desk, radio end-table, cocktail cabinet and many other newand exclusive proj- ects, Casein Company— makers of CASCO— famous casein glue—makes it possible for you to build them easily...inex- pensively...from complete plans whichareFreein 1937 CASCO Project Service. How. to Get Free Plans Every 25¢(orlarger) package of CASCO contains a green ticket listing all 24 projects. Check project you want and complete plans will be sent you Free, postpaid. If you want to see pictures of proj- ects, ask your Dealer for new 1937 Free Project Fold- er...oruse coupon below. FIXES THINGS PERMANENTLY Sold by Hardware, Paint and Lumber Dealers Everywhere = m — — — — — — — € —À SEND ] [CASEIN COMPANY,-OF AMERICA, Inc. [| 1350 MedisonA ve., Dept. MM537, NewYork, N.Y. | : FOR B I Please send folder about FREE Project Servloe. ] FREE FOLDER ] Street. Leite... PRINT cw PHOTO. Se NEW, AMAZINGLY SIMPLE! NO DARK ROOM! PRINTS INDOORS, OUTDOORS: DAY or EVENING. TRANS-PIX Prints Are Permanent, Washable! Guaranteed Harmless to Negative NOW, you can make your own picture- prints directly from amy 0f your negatives with the new, sensational TRANS -PIX —-oné of the most unusual formula -discoveries to TA come out of the chemists’ laboratories. In a few mo- ments of interesting work, you have made astonishing repro- ductions upon such unusual surfaces as plain paper, (Station- ary, envelopes, books, cards), alf fabrics ('kerchiefs, lingerie, shirts, pillow cases, etc.), as well as on Rubber, Wood, Porcelain, Leather, etc. You can make10r100 prints from any one negative. SEND NO MON EY Pay Postman$1.00 on arrival, plus a few cents postage, for Complete Outfit. If you prefersend $1 postpaid. AgentsWanted Everywhere, RELIABLE PRODUCTS, 930 Roosevelt Road, Dept, A-1, Chicago, lll. Build This Automatic Washer [Continued from page 114] is filled with sand and a small wood plug is tapped into each end. Now bend the ends sharply at a right angle and in parallel planes. Just inside of these bends and at right angles to them bend the tubing. Follow this same procedure with a piece of 4%” copper tubing. A glance at the illustra- tions will make this explanation clear. The plugs are removed and the sand tapped out. The sand is to prevent the tubing from “kinking” at the bends. About 5" from the top and at one end punch two holes to receive the bent ends of the l4" tubing. Punch two holes in the bottom to receive the 4%” tubing and solder these in place inside and out. A piece of %” copper tubing about 20" long is now bent to the shape of the tank. Place a female fitting on the end and flange the end of the pipe if it is not already flanged. Flatten the other end and solder. Using a round or rat-tail file, file the center of the tubes soldered to the tank, half way through and file the 36" piece to correspond to these holes as defined in the per- spective diagram. Next carefully solder these joints, using plenty of solder but taking care not to fil the tubing. Punch a hole in the bottom of the tank and solder a small drain cock in place. Cut a 1" hole in the center of the tank in the opposite end from the tubing and insert a 34" pipe nipple, using two pipe nuts and rubber gaskets to secuxe a water- tight fit. Cut three galvanized strips, 8" wide, to form the shields or deflectors which are mounted over the inlet and outlet tubes. The shield in front of the outlet opening is drilled with several 39" holes. The other two shields are smaller and are soldered inside the tank just over the tubes. These shields prevent the prints from catching on the tubes as they rotate in the tank. Connect the water supply to the tank with 15" pipe and near the tank place a needle valve in the line to control the flow. The outlet is piped to a drain or nearby sink. The tank is best mounted by fastening to the wall with three lag screws inserted close to the top above the over- flow pipe. Prints up to 8" x 10" may be washed in the tank by merely placing them in the water and adjusting the flow to permit a slow rotation of the prints. Cut films may be suspended from the top with a rod and allowing the water to flow slowly. Films should not be allowed to rotate in the tank. Before enameling the tank with an acid re- sisting enamel, wash. with vinegar or dilute acetic acid or the enamel will not adhere well to the galvanized iron. Colonial houses were not ordinarily painted white in real Colonial days; mostly they went un- painted. 124 Accept No Substitutes! Akcays Insist on the Advertised Brand!

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Attachments for grinding skates, grass shears, hedge Shears, sickles, scythes, axes, etc. Send Post Cardfor FREE CATALOG and Com^l-te Plans THE FATE-ROOT-HEATH CO. 337 Bell St., Plymouth, Ohlo Amasing Sensational Discove NISHES AUTOS Like NEW/ AE PAYS 16 5799 AN HOUR Kar-Nu is a new, miracle discovery—a transparent, magic-like fluid with which anyone can refinish any color automobile easily, quickly and economically without polishing, waxing, rubbing or pointing. Just wipe it on with a cloth! Immediately dullness, discoloration, shabbiness, eun fade disappear. Instantly, as if by magic, the old finish is reju- venatad and restored to the lustre, life glow and Seanty of the original finish, As KAR-NU dries it seals the pigment and protecta the finish from further wear. Lesta 8 to 12 months. GUAR- ANTEED. Eqnal in beavty to a repaint or re- finishing joh which costs $25.00 to $75.00.. FREE SAMPLE Enermons demand! Millions want ic! W. L. Mor- Polish or Paint | £ M 10. Lasts 8toí2 Months] ARNG to individuals, hect owners, paragan auto accessory atorea, used car dealers, etc. No experience necessary. Write for FREE sampie to prove our claims and territarv e GUARANTEED | Dept, R-83, Oakley Station, Cincinnati, Ohio KAR-NU CO., 126 Accept No Substitutes? Rope Stunts For The Amateur [Continued from page 95] apparently pull it completely through his neck. The illustra- tions on page 94 show how this illusion is performed. Two ropes of equal length are folded in the center and the loops interlocked by applying pressure with the thumb. ‘The per- former walks forward with the ropes, concealing the loops in the palm of his hand, and allows the spectators to securely tie the ropes around his neck. The looped portion should he placed at the back of the neck and held in place with the thumb and forefinger. The audience will not be suspicious of this if you mention that you are protecting your neck from possible friction burns from the rope. At a given signal have the spectators pull the rope and at the same time release the pressure on the loop, hooking your finger on one of the ropes so that you can quickly gather both loops and hold them up to your audience. Performed in the proper manner the rope actually appears to pass through your neck. The “Ghost Release" is another simple but very effective stunt in which the performer permits himself to be securely tied to a chair with double ropes passing around his wrists, ankles and waist and after allowing spectators to inspect his bonds frees himself in a split second. In this stunt the ropes are prepared in much the same manner as the rope used in the "Strangled Rope Escape" except that the loops are tied together with cotton thread having the same color as the sash cord. The ropes, after being tied in the middle with thread, are carried out on the platform by the performer, who conceals the joints in his closed hand so that they appear to be just two ordinary lengths of rope. Tie the first knot your- self so that the joints are not visible, then allow the remain- ing knots to be made hy members of "the audience. To mae your escape simply give the ropes a sharp tug to break the threads and pick up the pieces of rope, brushing off the strands of thread. Spread each loop so that the impression of the thread does not reveal the secret and pass the sash cord around in the audience. Since each of the jointed sections forms a perfect loop, detection is impossible. For the concluding stunt the magician depends entirely upon human nature and not on trick knots or splices as in the previous escapes. - In the “Shackle Wrist Slip" the performer comes forward with a one hundred foot coil of rope and allows half a dozen people to assist in tying him up in any manner they care to chocse. Have the spectators start by tying your wrists with one end of the rope and then proceed by tying you around your arms and waist so that the rope winds in a rather wide “X?” formation. When spectators are winding the rope around your body and tying you up. securely insist that they work fast. Be sure that one person doesn’t do all the work. The more people involved, the better and quicker are your chances for escape. By remaining moderately rigid during the tying- up operation, ycu will be able to free yourself in a few minutes simply by wriggling out ef the rope wound about your waist and untying the knots in the remaining rope. One person may bc able to tie you up securely, but never a group of people as you will discover when you try this clever stunt. All of the escapes described here can be mastered without difficulty and will provide plenty of live entertainment for a party or social gathering. Mastering the various types of knots such as described in Scout Handbooks will prove valuable if you intend to devise similar stunts of your own. Oats Make Strong Antiseptic Oat hulls and other farm wastes may in future yield powerful antiseptics for use in medicine and for combating plant diseases, as they already supply industry with materials for making plastic products such as steering wheels, radio panels, and electric insulators. Doctors N. M. Phatak and C. D. Leake, of the University of California Medical School, have combined furan, an oat-hull derivative, with mer- cury in various ways, producing a number of promising germ-killing compounds. In dilutions, one part of antiseptic in from 15,000 to 30,000 parts of water, they killed test cultures of colon bacilli and the yellow germs that cause boils. Akvays Insist on the Advertised Brand!

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GEORGE, YOU DID ME A BIG FAVOR BY REMINDING ME | SHOULD USE GILLETTE BLADES IN MY GILLETTE { GEORGE 3 KNOWS WE & WERE MADE FOR EACH Happy when you use the blade that was made for your razor e Rigidly matched in design and manufac- ture, the Gillette Razor and the Gillette Blade function tegether in perfect harmony. That’s why an ^All-Gillette'* shave is thelast word in shaving comfort. Buy a packageof Gillette Blades today. Reputable Merchants never offer substitutes for Gillette Blades, Always ask for them by name, Gillette Blades Precision-made for the Gillette Razor Shaves Are Here Again Tune in Gillette’s “Original Community Sing” with Mil- ton Berle and other stars Sunday 10 P. M., E. S. T., CBS Network, Coast to Coast ACCORDING to an axticle by the president of the world's largest motor research corporation, there is enough energy in à gallon of gasolineif it were converted 100% in mechanical energy toruna four cylinder car 450 miles, NEW GAS SAVING AND TOP-OILING INVENTION Astonishes CAR OWNERS A Marvelous Device has accom- plished wonders in utilizing a por- | ff tion of this waste energy. Jtsaves |M gasoline, gives better mileage, re- duces carbon formation, creates | z more power, gives quicker starting, snappy Pick-up anda smoother running motor, Saves many repair bills, Big Profits and Free Offer! ... To obtain national distribution quickly, men are being appointed everywhere to help supply the tre- mendous demand. Free samples furnished to workers, rite today for this free sample and big money-making offer. Diamond Fuelizer, Dept.117, 600 High St., Akron, Ohio HERE IT IS—SPORTCYCLE, THE LATEST FORM OF SWIFT, ECONOMICAL, THRILL- ING TRANSPORTATION!—ONLY $39! A light weight, easily handled, comfortable power-seooter. Has air. wheel tires, dural beam frame, A dependable, powerful air-cooled motor. Goes 30 miles per hour, climbs steep hills, makes 100 miles Der galion. Sportcycle takes you where you want to go at a cost of Vs cent per mile. To work—to school, for real fun—ride your own sporteycle. As much fun as a motorcycle—dependable as a car—saíe as rall transportation. Cheapest power transportation known. Thousands will ride a sporteycle, Practical and enjoyable for men and women, girls, boys—8 to 80. Write now for illustrated folders and complete a SPORTCYCLE SALES 580 Market St. San Francisco, Calif. Here Is a golden opportunity for Agents. ml of your friends are prospects for a Sportcycie. When Answering Advertisements Please Mention May Modern Mechanix 2 complete charts, easily un- derstood directions for chang- ing any car to Diesel. A proven je method different and hetter. | Run your car on Diesel—amuze your friends—pocket th they gladly pay for Di their cars. ach conversion 7 7 another demonstrator, ‘Think of it—a profitable, big business can be yours in the fascinating Diesel industry LD on à single dollar investment! ALSO we will send you 22 yy i for prompt action ga G E SHOULD KNOW ABOUT This FREE big book worth Several dollars alone to any ambitious Diesel.minded man. Your chance to learn how to start RIGHT and make real money in Diesel, Just of the press —inside facis on countless opportunities— money-making suggestions—crammed full of Meaty, valuable information never before as- sembied under one cover—a real eye-onencr and brain-wisener worth plenty to those alert for short cuts to success In gigantic Diesel industry. You can't afford to wait another day before sending for these charts and ''What every man should know about DIESEL''—the biggest dollar value ever offered men ambitious for big success in Dlesel. SEND FOR IT TODAY. Put a dollar bill ($1.25 out» Side U. S.) in an envelope with your name and address, Address |t to HARRINGTON PUB. CO. Dept. B 515 Davis Bldg., Portland, Oregon, U.S.A. [oo ^. mmm “IN THE U.S. 127

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Coaching Diesel Engineering Radio and Television Dratting and Design Salesmanship _ Electrical Engineering Steam Engineering Learn Profitable Profession à in OO days at Home +, Salaries of Men and Women in the fascinating pro- à fession of Swedish Massage run aa high as $40 to i 22 per week but many prefer to open their own of- ices, Large incomes from Doctors, hospitals, sani- tariums, clubs and private patients come to those who qualify through our training. Reduc- alone ofera rich rewards for gpectnl- sts. Anatomy charts and supplies are given with our course. Write For details Natlona! College of Massage & Physlo - Therapy, 20 N. Ashland a Avenue, Dept. 558, Chicago, Ill. Y MECHANICAL WV for things mechanical. Study at home in spare time with the International School of Engineer- ing. Thousands of students have good jobs at big sal- cries. Individual instruction, Quick progress because you are in a class by yourself. Courses written by well- known mechanical engineers. MAIL COUPON FOR FREE BOOKLET A wonderful field for men who have a liking | INTERNATIONAL SCHOOL OF ENGINEERING — Associated with the International Correspondence Schools Box 2318-M Scranton, Penna. Without cost or obligation, please send me full details of your home-study course in MECHANICAL ENGINEERING Name. Address 128 Accept No Substitutes! Accessories For Trout Fishing [Continued from page 117] affords a better reach. For large trout select a net with a generous width of frame for reasons that should be obvious. To land a large trout in a small net is little short of nerve-racking. While fishermen have been known to get along without fly books in which to store their flies, the fact remains that they are very nearly an absolute necessity. Fly books come in all manner of sizes and material, good, bad and indifferent. A large fly book will carry from ten to twelve dozen flies or more. 'The usual procedure is to carry your supply of flies in a large fly book, leaving it at your stopping place, then carry a smaller fly book in which the few flies to be used for the day will be enclosed. A large fly book is often very difficult to handle when standing in mid-stream. Cheap, imitation leather fly books should not be used. 'They soon become ragged and useless. Metal leader boxes with felt pads are used a great deal and are very handy. There are simple leather pouches that also serve the purpose. A rubber snuff pouch of the flat, compressed sort is an unusually handy article in which to carry leaders, keeping them moist and flexible. Gly- cerine applied to the leader pads aid in keeping the leaders soft. For the upright-winged dry flies and like lures there are fly boxes two inches deep, with various compartments with transparent lids. There are some unusually excellent ones on the market. They are made to fit in certain pockets for the purpose in fishing jackets. A very good idea is to attach a cord to your fly book, fly box, etc., the same likewise attached to the coat so that you will always have them in check if you should take a spill or they should fall out. Some have their tobacco pouches and pipe in check with chains or cords in the same way. It is not a bad idea. Novelties From Walnut Shells [Continued from page 108] With all the nuts in place, re-mount on the lathe and turn under high speed and cut with sharp tools. Sharp tools and high speed are nec- essary to prevent the lacy structure of the nut from chipping out. Turn out plate front to the desired shape, and then turn the back by the conventional chuck method. When completed the nuts extend through the plate with the design showing on either side. Finish on the lathe with a "French polish," which is a mixture of two parts shellac and one part boiled linseed oil, ap- plied with a rag under high speed. Or, if desired, finish with a coat of shellac followed with two coats of rubbed varnish. Novel and attractive jewelry can also be made of the nut designs, as shown in the illustrations. A variety of patterns can be obtained by cutting the nuts at various angles. Always Insist on the Advertised Brand!

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Mechanizing The Mounties [Continued from page 45] to explain that the police uniform forage cap, a “pillbox” cocked over the right ear by its chin- strap, was "no use at all on the prairies." Super- intendent Jarvis boldly offered his idea of a useful hat for policing the plain, "a broad- brimmed hat of soft felt." But the superinten- dent was ten years too modern for Ottawa. It was not until late in the nineties that the broad- brimmed felt "stetson" recognized from Holly- wood to Moscow as the trademark of the Mounties was approved and issued. Requests for mechanical aids to prairie police work met somewhat swifter response from the Canadian Government of fifty years ago. But not too swift. In the year '85, Superintendent Jarvis—he of the hats—was asking for two tele- phones, price fifty dollars, to connect the two main posts of his division, "so as to ensure atten- tion for our somewhat urgent business" when the railway telegrapher was away drunk. Two years later he was still asking for the telephones and from further west the Lethbridge command was putting in its annual appeal for a telegraph line —"one to Milk River would save our horses’ legs." Persistent modernity was rewarded at last. In 1888, in all the posts, telephones went in, “greatly increasing our efficiency”, Commissioner Herch- mer reported, “and effecting an enormous saving in wear and tear on horses.” In the same year the Mounties were further mechanized to the extent of one typewriter, the first in the force. It came west to Fort McLeod in answer to the commissioner’s appeal for a “small printing press” which, he assured the Prime Minister of Canada, would “save an enormous amount of writing and free the constables for police duty.” That first typewriter started something. In Regina barracks nowadays there are daily “typewriter parades” for recruits of the Royal Canadian Mounted Police. Gasoline comes into the record twenty years after the typewriter, with the Peach murder case. Peach, owner of a lonely ranch forty or fifty miles south of Calgary, had disappeared. A Mounted Police patrol sent to investigate discovered his bullet-riddled body in a nearby river and tele- phoned Calgary for help in rounding up the sus- pected murderers before they skipped the country. Now forty or fifty miles cannot be ridden by any horsemen in less than a day and the call was urgent. So the officer commanding at Calgary went modern and hired an automobile for the journey. The journey was made and the mur- derers caught. They confessed their crime and were brought in to Calgary for trial. Then the innovator sat down to write his report. Concerning the crime, capture and confessions it is a model of brevity, but when it comes to the usefulness of the hired automobile it might almost be called effusive for a Mounted Police document. [Continued on page 131] When Answering Advertisements Pl Part of Page Missing

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Part of Page Missing Flying Cloud [Continued from page 84] where white paint will be used over it. The planking on the raised sheer is fitted similar to the side planking, and if a classy job is desired should be of mahogany and finished natural. The decking in the bow well will be easier to fit if the planking of the upper sheer is delayed until this job is finished. Now is a good time to get in the motor beds and install the motor. 'The exhaust piping as well as all fuel and water lines will be a lot easier to fit at this time. With these in place the cockpit floor should be laid and canvassed. The steering gear installed and then the two ends of the cock- pit built up of tongue and grooved staving with joints painted. The bridge deck is now laid and canvassed. The cockpit canvas turns up under the trim around the floor so that it can be easily renewed. The bridge deck canvas is turned down over the forward cockpit end and up under the cabin end bulkhead to make a weather-tight job. A generous application of gray Staytite cement will insure watertightness. The cabin end bulkhead is now completed and trimmed off flush with the top of the beam. Door posts are installed and the cabin top is ready to be laid. This is laid up using tongue and grooved material with a vee edge, or beaded edge as the builder desires. It will be found that the vee edge is much easier to paint. The planking of the raised sheer should be left an inch and a half high for- ward of the cabin and the cabin top material worked to a thin edge along the raised sheer at the bow to allow the cover board to finish out as a rail cap forward. When the cabin top material is close enough to the companionway to support the beams, they are cut and the headers for the companion hatch fitted. The cabin top material is then continued across to the side of the boat. The top is covered with number ten canvas with the material laid up with either a seam down the center, or across the hull if narrower material is used. In event that the material is laid across the boat all seams should lap aft. All of the canvas throughout the boat is either laid in marine glue or white lead thinned with varnish. Seams and edges of the canvas are secured with 15" copper or galvanized tacks spaced on no more than three-quarter inch centers. The canvas should be wet down im- mediately after laying and painted with a priming coat when partially dry. The forward and aft decks are laid up in narrow strips of edge grain material and the seams caulked. They can either be finished natural or painted as the builder desires. The seams of these decks are filled with deck seam composition or gray Staytite. Sufficient material should be allowed around all deck openings when the canvas is laid to turn up inside the framing of these openings to keep the water out. After the canvas is primed the cover boards may be laid in thin white lead. [Continued in June Modern Mechanix] Insist on the Advertised Brand!

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Mechanizing The Mounties [Continued from page 129] Its writer seems to have had an uneasy feeling that the automobile would take a lot of justifying. The same uneasy feeling may be traced in the chief commissioner's report for 1919-20, the year motor cars were first listed among Mounted Police transport. “Owing,” it runs apologetically, "to the general use of motor-cars, it has been found necessary to supply mechanical transport, to a considerable extent replacing the old horse trans- port...” In the light of events, the apology for a few automobiles reads oddly. Within a few years the Mcunties had taken to wings and water. It is just fifteen years since the old Royal North- west Mounted became the Royal Canadian Mounted Police, and only four years since it took over the preventive service on the eastern and western coasts, made the first aerial patrol of the Arctic and shocked their most faithful admirers by putting to sea in pursuit of rum-runners. At the time there were the inevitable witticisms about the Horse Marines and the value of spurs in a nor'easter. But they are all forgotten. A Canadian no longer grins when he reads in his daily paper of a cargo of smuggled rum captured by Patrol Boat 000 commanded by “Chief Skipper Smith of the Mounted Police.” He sees nothing queer in the fact that there aro more Leading Stokers, Able Seamen and First Class Engineroom Artificers in the ranks of the riders of the plains today than there were mounted constables in 1873. Horse Marines and the rest of the timeworn jests notwithstanding, the Mounties do not go to sea in spurs. They wear the blue serge jumper and bell-bottomed “slops” drill collar and flat- topped cap of the British navy. Only on their cap ribbons are the initials R. C. M. P. and their arm badges bear the famous buffalo head crest with its motto: Maintiens le Droit (Maintain the Right). The sea-going Mounties have had a tough time doing it. They are the men who run against mechanized lawlessness in its most efficient form. High-powered motor ships at sea, highpowered cars on land, highpowered speedboats operating between ship and shore and shortwave radio con- necting all three make a rum smuggling com- bination hard to beat. Sir James McBrien, head of the Mounted Police, frankly admits that they haven’t beaten it yet. But growing lists of seizures and convictions attest that since the Mounties took to sea the trade of salt water liquor smuggling has been neither as safe nor as profitable as it used to be. The same lists show that Mounties in the air have added nothing to the joy of the rum-runner’s life. Air patrols, made in the seaplanes of the Royal Canadian Air Force, are today ordinary Mounted Police duty on both coasts. The aircraft, radio equipped, patrol hundreds of miles of coast and [Continued on page 132] : osten d f J | No? E make this generous of- fer so that new thousands of car owners will try No. 7 Duco Polish immediately, and see how greatly it improves the ap- pearance of the car. You should use No. 7 Polish on new cars as well as old. It keeps new cars beautiful and restores the color and lustre of old finishes dulled by grime and Traffic Film. Now we offer a Du Pont Cellulose Sponge (25c size) FREE to everyone who buys a pint can of No. 7 Polish. (Offer good in U. S. only.) This sponge, created by du Pont chemists, is ideal for bath and household cleaning, as well as for the car. See your dealer WHILE THEY LAST! When Answering Advertisements Please Mention May Modern Mechanix AMAZING SPONGE A new sponge made (like rayon) of Cellulose. Soft, durable, sanitafy, highly absorb- 131

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= MECHANICS & WELDERS GOOD JOBS and Mighty GOOD PAY Do you want to earn big money? If so. let us know which of the following trades you prefer. You learn by doing. Practical work. Expert teachers. Low tuition. Personal attention. It will pay you to investigate AT ONCE. Just check the courses you'd like to take and mail today. You will receive full information, absolutely without cost or obligation. But don't delay. Check the Trade You'd Like to Learn O Auto Mechanics D Welding O Auto Collision O Spray Painting O Metal Finishing O Torch Soldering Name ...22 ke ra Ry ROME wees VER pagers Address E sot n Ask about our Pay-After-Graduation Plan Mail the above to MICHIGAN TRADE SCHOOL 3763 Woodward Avenue DETROIT, MICH. 1j etos n. 122 Mechanizing The Mounties [Continued from page 131] coastal waters, spotting suspicious looking vessels, signaling their position, and "standing by" above until the nearest powerboat patrol turns up to inquire into the stranger's business. The flying Mounties are playing an increasingly useful part in the international working agreement estab- lished between Mounted Police coast patrols and the United States Border Patrol. Tomorrow will be the day of the air smuggler. Already his advance guard has entered Mountie territory but so far it hasn't been happy there. The 1935 Mounted Police records show two cases of airplane smuggling. In the first, the load of smuggled liquor was seized but the plane got away. The second involved contraband ciga- rettes, transferred from aircraft to motorcar in a farm field. It turned out even more unluckily from a smuggler's point of view, for the Mounties arrived on the job at seventy miles an hour and the adventure in aerial tobacco importing ended in jail for the adventurers and the seizure of air- plane, motorcar, and cargo. As R. C. M. P. head- quarters see it, air smuggling is sure to come, though it’s still a little too costly to be popular with the run of "free traders" When it comes, the Mounties intend to be ready for it. In the meantime there are the jobs on hand. One job has always been on hand for the Mounted Police—hunting down contraband liquor. In the eighties it came into the Northwest in everything from imitation eggshells to barrels of coal oil. In the nineties it hit the trail of '98 just one jump behind the gold rush, but the Mounted Police were three-quarters of a jump ahead of it. Enterprising traders who came in from Skagway to do a little two-way smuggling in whiskey and gold dust found the Mounties waiting in the Pass. They found, too, established at the boundary and in good working order, the international working agreement already men- tioned, product of the sound understanding with their opposite numbers in Uncle Sam’s service that has been from the beginning the Mounties’ particular pride. From the Klondike to the coast of Nova Scotia, from '98 to '37, from dog sleds to 160 h. p., radio- equipped motorboats, is a good way, but in pur- suit of their old quarry, the liquor-smuggler, the Mounties have taken it in their stride. The in- ternational working agreement that actually works has come along with them. At the moment, with the help of such modern improvements as wings, sea-legs and wireless, it is working well. Except in fog, gale, or the dark of the moon, a rum-runner can hardly spit over the twelve mile limit anywhere between latitudes forty and fifty north, without every Mounted Police and Preventive Officer from Halifax to Boston knowing it. There is another chapter in the story of the modernization of the Mounties, and with it, too, there is an international working agreement. It Accept No Substitutes! Always Insist on the Advertised Brand!

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is the record of radio and the last frontier; the tale of the men, the dogs and the machines that have carried law to the Arctic barrens and be- stowed the mixed benefits of jazz and justice upon the simple Eskimo. Its beginning was in 1921. In that year wire- less receiving sets were installed in all the Arctic outposts of the Royal Canadian Mounted Police. With the sets went instructions to chart reception and note the stations most consistently received. Next year, headquarters in Ottawa, guided by the information gathered, arranged with Ameri- can commercial stations from Boston to Cali- fornia the first R. C. M. P. broadcasts to the Arctic. Tales of the coming of those first messages read like the unlikeliest fiction. As good as any is the one of "Inspector Blank" stationed at Herschel Island in the Western Arctic. Inspector Blank came in from a three weeks' patrol among the ice floes, turned on his radio, sat down, and started to take off his fur boots. Before the second boot was off he heard, from Station K. O. M. O., California, the announcer's voice: “I have a per- sonal message here for Inspector Blank of the Royal Canadian Mounted Police stationed at Herschel Island, Western Arctic . . ." Inspector Blank mushed a hundred and fifty miles out to Aklavik to send a wireless to Station K. O. M. O. with thanks for that message. That was the beginning of radio in the North. Today, messages from R. C. M. P. headquarters go on the air at fixed times to the Canadian Government station at Aklavik, are rebroadcast, picked up by the wireless of the R. C. M. P. Arctic supply ship, St. Roch, and rebroadcast again to reach the farthest outposts of the Western Arctic. The Eastern Arctic posts cannot be reached that way. Only with one or two of the more powerful stations of Eastern Canada and the United States js their touch sure, so each summer the year's one supply ship carries in, by no means the least precious part of her cargo, the schedule of dates and hours of the coming year's Far North Broad- casts from stations W8XK and KDKA Westing- house and the Canadian Radio Commission's stations. Each week, at the hours fixed, the messages go out from the broadcasting stations of great cities to be gathered from the Arctic night by the antennae of many Mounted Police post wireless receivers. News for a fur-trapper of a son born in Montreal; birthday greetings to a Hudson Bay factor from his sister in Scotland; advice to an Ungava prospector that his mother-in-law is dead in Vancouver, all mixed with the routine notices and orders of the force. All the brave and pitiful drama of man’s life is in those mes- sages. Lonely men, they say, will travel two hundred miles by dog sled to be in the police shack at the hour when they come. One last story, to prove that, though mounts and methods change with the times, the spirit of the Mounties is unchanging. It is told, always [Continued on page 134] FACTORY TO YOU NEW REMINGTON NOISELESS PORTABLE! 104.. Money Back Guarantee 10-Day Free Trial Offer T LAST! The famous Remington Noiseless Portable that speaks in a whisper is available for only 10¢ a day. Here is your opportunity to get a real Remington Noiseless Portable direct from the factory. Equipped with all attachments that make for complete writing equipment. Stand- ard keyboard. Automatic ribbon reverse. Variable line spacer and all the conveniences of the finest portable ever built. PLUS the NOISELESS fea- ture. Áct now while this special opportunity holds good. Send eoupon TODAY for details. YOU DON'T RISK A PENNY We send you the Remington Noiseless Portable direct from the factory with 10 days FREE trial. If you are not satisfied, send it back. WE PAY ALL SHIPPING CHARGES. © FREE tveine course With your new Remington Noiseless Portable we will send yon —absolutely FREE—a 19-page course in typing. It teaches the Touch System, used by all expert typists. It is simply written and completely illustrated. Instructions are as simple es A, B, C. Even a child can easily understand this method. A little study and the average person, child or adult, becomes fasci- nated. Follow this course during the 10-Day Trial Period we give you with your typewriter and you will wonder why you ever took the trouble to write letters by hand. © FREE carrvine case Also under this new Purchase Plan we will send you FREE with every Remington Noiseless Portable a special carrying case sturdily built of 3-ply wood. This handsome case is covered with heavy du Pont fabric, The topis removed by one motion, leaving the machine firmly attached to the base. This makes it easy to use your Remington anywhere on knees, in chairs, on trains, Don’t delay. . . send in the coupon for complete details! SEND COUPON WHILE LOW PRICES HOLD Remington Rand, Inc., Dept. 141-5, 315 Fourth Ave., New York, N. Y. Please tell me how I can get a new Remington Nolseless Portable typewriter, plus FREE Typing Course and carrying case, for only 10c a day. Also send me new illustrated catalogue. Name. Address— City- — —State—— — —...—.. = When Answering Advertisements Please Mention May Modern Mechanix 133

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Mechanizing The Mounties [Continued from page 133] with deep feeling, by modernized Mounties—the story of the death of Rollo, the faithful flivver. Its vintage is early 1920, a year when a watch- ful Dominion Treasury was still unconvinced that the Mounted Police needed all the motor equip- ment they wanted. In those days keen police officers used their own cars on duty and mileage was, occasionally, allowed. Rollo was such an officer’s car, a T-model belonging to a sergeant of Mounties so junior that he still liked banana splits. The sergeant was stationed, with a con- stable still more junior, in a Western Ontario village not far from the Michigan border and Rollo was his pride. On a warm summer afternoon Rollo’s master sat in the village ice cream parlor eating a banana split. His constable sat with him. Rollo waited without. When the banana splits were no more than half eaten a large black car was seen to pass the window of the ice cream parlor. It was paying no heed to speed limits. The sergeant put down his spoon. After the big car came a little one, covered with dust and honking hard. His constable at his heel, the sergeant made for the door, for the driver of the second car was the chief constable of the next town. Then began the ride that killed Rollo. Five bounding miles out of town the faithful flivver overtook the second car of the two, pulled aside to let the red tunics pass. “Bank robbers!” its driver shouted. Rollo’s owner did some fancy pedaling. Rollo shot ahead, caught the edge of the black car’s whirling dust cloud and hung on. Forty-three, forty-four, forty-five—leaping from rut to rut, chugging hard on all four cylinders, rattling in every bolt, Rollo hung on to that dust cloud while his master ate dirt and played varia- tions on the throttle. Forty-nine, fifty, fifty-one—snub nose boring into the thick of the dust, Rollo closed on the car ahead. Fifty-five, and the off fore wheel in the ditch—but the near one was hub and hub with the back wheel of the black car. Fifty-six—was past it. Fifty-seven—was crowding close on a front mudguard—was clear and spinning ahead. The end of that wild ride came when, crowded off the crown of the road by the indomitable Rollo, the big black car ploughed into the ditch. But it is given on the word of a Mounted Police Officer who is no longer a junior sergeant that Rollo touched sixty first. The arrests were easy. Overawed by Rollo's performance, the bank robbers made no fight. Only when the town constable, still honking strongly, arrived on the scene and the moment came for return with the prisoners was it diz- covered that Rollo was a casualty. No cranking could get a lick out of his engine, nor skillful foot- work among the pedals wake a spark in any cylinder. Sadly they left him and took their captives back to town. Rollo never ran again.

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"Its" Of The Titanic Tragedy [Continued from page 122] radio operator, if he "had any ships." replied, “Only the Titanic.” He then told Evans to inform the Titanic that they were stopped by ice for the night. We al- ready know of Evans’ futile attempt to do so. At 11 p. m. those on the Californian's bridge saw the lights of a “medium sized ship coming up from the eastward.” At the Inquiry, Third Officer Groves told Lord Mersey he was positive that it was a passenger ship. Captain Lord, on the stand, swore that it was a freighter. Lord watched the ship until 11:30 while Groves tried to get into communication with a signal lamp or blinker. They saw no reply. At 11:40 p. m. "her lights seemed to go out, as she turned to the south- ward." 'The collision, it will be recalled, occurred exactly at 11:40 and the Titanic’s head had been swung to the southward in a vain attempt to avoid the berg. They concluded that she, too, was stopped by ice and had put out her lights for the night. Itis next to certain that Captain Lord and Third Officer Groves saw the Titanic strike the berg, unaware, of course, of what they were witnessing. At midnight, Groves was relieved by Second Officer Stone and an apprentice, Gibson. Lord went to lie doyn in the chart room about 12:15 a. m., after pointing out the approaching stranger to Stone and instructing him to watch her. Groves left the bridge also, but instead of going to his room, he went to the Marconi room, where he awakened Evans who had just gone to sleep. "What ships have you got, Sparks?" Sleepy and perhaps annoyed, Evans replied, "Only the Titanic." Groves went back into the instrument room and picked up the phones; he could "read Morse if sent slowly," but of course he heard nothing for the receiver was dead. It was of the old magnetic type which required winding like a clock and also skilled adjustment. At this very moment the Titanic was sending out her urgent SOS calls less than 15 miles away. This is one of the most poignant scenes in the whole drama: Evans asleep, Groves toying with a receiver which, if set into operation, would fairly have screamed the great liner's distress throughout Evans' cabin; 1,500 lives never hung by a more slender thread of the Fates. Groves listened in the silent headphones; heard nothing so switched out the light, shut the door and went to his room—Atropos had snipped the thread! At 1:15, Second Officer Stone blew down the speaking tube to the captain and reported that the steamer was going off to the southward and that she had sent up a rocket. Lord asked him, "Was it a company signal?" Roman candles, as well as colored flares, were still in use in 1912 as company night signals. [Continued on page 136] Evans When Answering Advertisements Please Mention May Modern Mechanix This spring your car gets a break Here’s a radiator cleaning process that Really Cleans “EVEREADY” -STEP COOLING SYSTEM PROCESS EVEREADY | RUSTONE ‘ff The Professional Cleaning Job V Cuts all grease and sludge! V/ Removes even hard rust scale! / Leaves inside of radiator bright and shiny! V Is harmless—less corrosive to alu- minum and radiator metals than water! The New "Eveready" Cleaner was devel- oped exclusively for car radiators. It is an entirely new solution, using new ingredi- ents developed during the past three years just for this job. There's nothing else like it. ESTIGATE _worRK FOR IN VE eveniet "Thousands of openings yearly. Many Social Security jobs. Men—Women, age 18-50. Start $105-$175 month. Get ready now for next entrance test. Details Free. Write INSTRUCTION SERVICE, Dent. 233, St. Louls, Mo. 135

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He seems to have been a man of decision and action; informed of the rockets he went immedi- ately to the wireless room and told Evans that a ship had been sending up rockets during the night. Evans jumped out of bed, rushed to the set. With a sinking heart he heard the details from the Mount Temple and the Frankfort. While he slept the world's largest ship had gone down less than 20 miles from them, with probably a heavy loss of life. Mr. Stewart returned to the bridge and in- formed Captain Lord, who hurried to the radio Shack and satisfied himself the news was correct. At 5 a. m. they pushed through loose ice toward the position given where the Titanic sank. About 7:30 that morning the Californian passed the Mount Temple. She semaphored they had no survivors. Shortly afterward they made out the Carpathia with her house-flag at half-mast; she was picking up the last boat. By radio it was agreed that the Californian was to continue the search for possible survivors while the Carpathia hurried back to New York with her rescued. On the appearance of the Carpathia, Colonel Gracie said, "In the midst of our thankfulness for deliverance, one name mentioned with deepest feeling of gratitude was that of Marconi. I wish that he had been there to hear the chorus of gratitude that went out to him for the wonderful invention that spared us many hours, and perhaps days of wandering about the sea in hunger and storm and cold." By an odd coincidence Marconi happened to be in New York waiting to return to England on the Titanic. Informed of her loss, he said it "seemed almost impossible." The Monday New York papers carried very little news on the new liner other than the report that it had struck a berg and might need assistance to transfer her passengers. Not until Tuesday, or more than 24 hours after the disaster, did the full news reach the world. 'The Carpathia was silent; her apparatus had a range of barely 150 miles. Parts of two entirely unrelated messages: "Are all Titanic passengers safe?” And another, from the SS. Asian that she was “300 miles west of the Titanic and towing an oil tank to Halifax,” were garbled together by an over-zealous operator into the famous and reassuring “all Titanic passengers safe, towing to Halifax.” With the first. news of the sinking of the Titanic, every amateur in America camped on his key and added to the bedlam. Anyone who could halt- ingly copy down a few incoherent scraps of con- versation over the air, pieced them together with the liberal help of his imagination. The news- hungry journals gobbled them up as first class, bona fide “news.” Tuesday most of the New York papers devoted their first ten or twelve pages to the disaster. The Turco-Italian War went on the back pages. The Olympic sent the relayed list of the first class survivors to Cape Race. When daylight came, she passed out of range as she hurried off to the east- ward. The Carpathia with her 150 mile range was [Continued on page 138] HOME OWNERS:- This was written for you and is serit Get your copy! O YOUR own simple home, auto and motorboat repairing and be inde- pendent of outside repair men. You will avoid delays, save much money, and have the satisfaction of knowing that the work is well done. The booklet contains clear diagrams and direc- tions for correct procedure for hundreds of com- mon jobs, and enables any home worker to get de- pendable results, easily, on any of the following: Stopping leaks in pipes, heaters, boilers, tanks, radiators, air ducts, smoke pipes, pails, ete., at connections, seams, cracks, rivets or holes. Tightening or anchoring loose hinges, locks, handles, screws, bolts, nuts, bases, stems, tops, casters, ete. Making waterproof joints at skylights, roof cracks and flashing. Making wet eellars dry from the inside, making conerete floors hard, water and oil proof, and non-dusting, making ma- sonry walls waterproof. On the car:—Stopping leaks in the radiator, at hose connections, or in oil and gasoline lines, patching eracked water jackets, crank, gear and differential cases, tighten- ing loose rivets, mud guards, lamp stan- dards, hub caps and lubricator connections, loose moulding serews, ete. Smooth-On Iron Cement with which this work is done is applied without heat, without special tools, and so easily and inexpensively that half a dollar to half a hundred dollars is saved in each instance. Smooth-On has been widely used in industrial work for over 35 years and its use is standard practice by power plant engineers and repair men. ee Get the booklet by mailing the coupon and buy Smooth- On No. 1 in 7-oz., 1-Ib. or 5- lb. can from your hardware Store or if necessary from us. SMOOTH.ON MEG. CO., Dept. S-37 574 Communipaw Ave., Jersey City, N. J. Please send the free Smooth-On Repair Book. When Answering Advertisements Please Mention May Modern. Mechanix 137

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Caricatur ing is as fa as le methods ARICATUR- Contained In ING". Twelve Chapters, over pages, supported by more than 125 lllustratlons showing how simple It really is. o0 postpaid, five day money back guarantee. FREE: Complete catalogue of self- educational books on Com- 7 mercial Art; Cartooning; Lettering: Sign Painting; w Card Writing; and Silk ‘Screen Process. DRAKE & c0. 178 N. Michigan Ave., Chicago, Dept. 402 138 Accept No Substitutes! "Ifs" Of The Titanic Tragedy [Continued from page 131] isolated in deep silence. Crowds gathered in Times Square to read the latest bulletins. The White Star offices were besieged by sobbing, hys- terical relatives of Titanic passengers. President 'Taft was deeply concerned over the fate of Major Archibald Butt, his military aide and a close friend. Two fast scout cruisers, the Chester and the Salem, were dispatched to search the spot where the Titanic went down and also to intercept the Carpathia so as to radio in a full report of the wreck and a list of the rescued. No sea disaster had ever attracted such world-wide anxiety. Thousands of messages piled up at the shore stations. At the solicitation of the American Marconi Company, the government ordered all radio stations north of Hatteras closed down, leav- ing only those at South Wellfleet, Siasconsett, Sagaponack, and Seagate open; they were to handle Carpathia traffic exclusively. The order was enforceable only on commercial stations, the amateurs blithely continued “on the air.” The situation became so desperate that Newport Radio, a naval station, “requested that every station in range to keep out” until a list of the survivors could be obtained from the Chester. Department of Justice men went to work tracing the origin of false and misleading messages. The Carpathia continued on to New York, with Cottam her sole operator, putting in the most harrowing three days of his life. Every station on land and see was calling him. Handicapped with an inadequate set, he had 712 survivors’ names to get off, and besides, the hundreds of messages filed by them, to say nothing of his official traffic and the answering of innumerable communications from other ships. He was at the key without sleep or rest from Sunday morning until some time Tuesday night or Wednesday morning, when he collapsed over his key. He awoke at dawn on Wednesday and began again, continuing all day except for meals which were brought to him. Then Bride was carried up from the hospital to help Cottam, who was “getting queer.” Bride, whose feet had been frozen in the icy water on the raft, could not stand or walk, but, propped in a chair, he could work a key. He began to get off the list of the third class sur- vivors to the U. S. S. Chester. He and Cottam were forbidden by Rostron to send anything other than official and passengers’ messages, with which they were already swamped. Unable to transmit a word, Carlos Hurd of the St. Louis Post-Dis- patch, a vacationing newspaper man who hap- pened to be aboard the Carpathia, and his wife gathered all details for one of the greatest tri- umphs of journalism. As the Carpathia neared port on Thursday he dropped his article to a tug of the New York World, then a sister paper of the Post-Dispatch, and there were “extras” out with his story by the time the survivors landed in the evening. Hurd received $1,000 bonus and had three weeks added to his vacation. Always Insist on the Advertised Brand!

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The scene at Pier 54 will never be forgotten by those who were there that night. The gay decora- tions put up to welcome the new liner had been quietly removed. Over 2,000 pier passes had been issued to bonafide relatives, police, customs men, Salvation Army workers, nurses, doctors, and re- lief workers. The streets were roped off and guarded by hundreds of police. Twenty ambu- lances stood in solemn ranks. There were city and government officials, subpoena servers, and coroners. The air was electric, but strangely quiet except for suppressed excitement and quietly sob- bing or crying women. Many had come, hoping against hope, that someone near and dear and missing from the radio lists of the survivors, might yet descend from the gangway of the Carpathia. A woman passenger was the first to step ashore, followed quickly by the other rescued, many still showing marks of suffering or exposure. With characteristic American liberality toward dis- tressed humanity, every care and attention was lavished on the survivors. Customs formalities were waived, relief workers took charge of the indigent and homeless, the railroads offered free transportation to immigrants who had lost all in the disaster. An ambulance stretcher bearer was waiting for Bride. Marconi Company officials went aboard looking for him. He was still at the key with over a hundred unsent messages piled up in front*of him, entirely oblivious that the Carpathia had docked and that his work was over. His face was colourless, his cheeks sunken and his eyes shone as if with fever. He was soon ashore and under medical care. The Sunday after the disaster was observed throughout England as a day of mourning. The memorial services at St. Paul’s were deeply im- pressive. There was the usual aftermath of investigations; one by the United States Senate and later another by the Board of Trade in London under Lord Mersey, who found the “Loss due to collision with an iceberg brought about by the excessive speed at which the ship was navigated.” To this was added, “Low bulkheads, insufficient subdivision and lack of an inner skin” as contributory causes. The rescued represented 32 per cent of the total who had sailed with her, passengers and crew. Sixty-three per cent of the first class, 42 per cent of the second class and 25 per cent of the third class had been saved. Only 23 per cent of the crew survived their ship. Of the 1,662 men, pas- sengers and crew, only 315, or 19 per cent, were rescued. Of the women, 77 per cent were saved and of the children 49 per cent. The second and third class men were hardest hit; out of 160 second class men only 13, or 8 per cent, were left; while 55 out of 454 third class men, or 12 per cent, reached shore. Other steamship companies hastily ordered ad- ditional lifeboats, the slumbering British Board of Trade was shocked into revision of its 18-year-old life-boat requirements, written in the years when [Continued on page 140] Play a [une in One Lesson! SAY ! | DIDN'T KNOW YOU COULD. PLAY / f Easy as A-B-C by this Amazing Method UST think of it! You actually play the melody of a famous tune in your very first lesson! No long, tedious study and practice. You learn to play by playing! And you can choose any in- strument you please—piano, violin, saxophone, guitar or other favorite. No wonder over 700,000 men and women all over the world have taken advantage of this remark- able way to learn music at home! You need no private teacher, no special talent or previous knowledge of music. At last the way has been found to make music so easy to learn that: even a child can grasp it! Every step is made crystal clear in words and pictures. Yet this is no "trick" method. You play by note, just as the best musicians do. You can scon gain the ability to read music at sight. Think of the pleasure and good times in store for you! WHICH INSTRUMENT DO YOU WANT TO PLAY? Simply mention the instrument you would like to play in the coupon below and by return mail you'll get startling proof that you CAN master it, easily LEARN TO PLAY | and quickly in a few minutes a day. BY NOTE You'll receive a FREE Demonstration Lesson showing how this wonderful method actually works, together with an interesting illustrated booklet, No cost or obligation. Mail the coupon or write today. Instruments supplied when needed, cash or credit. S. School of Music, 2625 Bn Bldg. New York City. Piano Guitar enor Banjo Hawalian Guitar Plano Accordion Or Any Other instrument E U. S. School of Music, 2625 Brunswick Bldg., New York City g - Please send me FREE your Demonstration Lesson and illustrated § [| E Booklet showing how I can learn to play the ...sccssveevesevee L : (mention instrument), ' W Name .,........es ed B 1 M Address .. 1 I 1 L| City. sese seen teem nn ttt tan FommmmumwwmmmmamaummaummumammESmEGmaOmad When Answering Advertisements Please Mention May Modern Mechanix 139

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Building Lilliputian Railroads [Continued from page 39] have their ideas as a background to improve upon. Perhaps you join the local model club, or organize one yourself, after writing the model railroad magazine to find out who in your city is also a model railroader. Before you start to buy, you must choose a gauge. Gauge is the distance between rails, and as this distance in the model is a definite fraction of the 4' 815" gauge of real railroads, it determines the ratio to which you will scale down all of the rest of your railroad. For accurate scaling down, along with attention to detail, is the essence of this model business. By far the most popular size is 0-gauge. This is 1!4" between inside rail faces, 1/45 the dis- tance of the real thing. Many modellers stretch a point and use a scale of 1⁄4” to the foot with this gauge, thus modelling to 1/48 the prototype. A newer group uses the more exact scale of 17/64" to the foot, exactly 1/45 the size of the prototype. There are reasons for both choices, the biggest reason, perhaps, being what your friends are doing, in what scale the parts for what you are planning to build are most easily obtainable, and whether you are the kind who likes to be accurate for the sake of accuracy itself. Since in 0-gauge a locomotive and tender are nearly two feet long, a Pullman 21 inches, a freight car 11 inches, the average basement is rather lacking when it comes to space for a reasonably realistic right of way on which trains of anywhere near as many cars as the original can operate. 'To get around this objection there have been developed two smaller gauges which allow much more trackage and, at the same time, much smaller trains in a given space. The more popular of these smaller sizes is HỌ, standing for half 0. Like model railroading it- self, this originated in England, and has only become popular here during the last two years. Millimeters are used for measuring, the gauge being 16.5 mm. (approximately 21/32") and the scale 3.5 mm. to the foot. With passenger cars 11 inches long you can truly run a Pullman limited around your basement without the engine nosing the observation car. 00-gauge is slightly larger, running on 19 mm. track gauge and using a scale of 4.0 mm. to the foot. The advantage is largely in locomotive con- struction, as the space for the motor is not so restricted as in HO. "The space advantage is still there, although not quite so marked. It is hard to tell what will eventually develop in these smaller gauges for they are new and the manu- facturers are still experimenting with designs for parts and kits. Special rulers convert feet and inches directly into the measurements for these metric scales. Your gauge finally settled upon, you start building, preferably a freight car, as it's an easy project that's not too difficult for the beginner [Continued on page 142] ~ DRAWING f_ BIG MONEY! p BE an artist and be your “own boss," You can learn AT HOME in your spare time this simple, practical way. There's a big future in this fascinating and profitable field for men and women of all ages. A few pleasant hours a week should give you the ability to earn good money. COMMERCIAL ART CARTOONING AND DESIGN— All In ONE PRACTICAL COURSE Our proven method of instruction includes every branch of Commercial Art, and your drawings are given the correction “and guiicism of an. exper fenced ut instructor. ou start by drawing stralg! nes and in advancing irom deron tad lesson you receive MONTH e constructive help you need. |] forAxt—byJ. W. IT’S AS EASY AS | Cornell of Kan- Sas. Now runs $ own business. | PAID ITS 3 WAY d —L. Haymond gt E, for before com- pleted.’ [| $235 FOR ¥ From a simple framework to the finished figure. Art made easy by simple steps that the averape person can follow. The ahove is one of the Jf key poses in our illustrated / LIFE CLASS BOOK. Full Sizes ‘artiste’ Outfit Given —AT NO EXTRA COST! Eg o ng jj cial art after 12 Bi lessons. WASHINGTON SCHOOL OF ART Studio205A, 1115—15th Strect, N. W. Washington, D. C. l l Without obligation, please send me a FREE copy of your | Book, “Art for Pleasure and Profit." (eiin EREET ETETETT TTET State... | (No salesman will eall) | DDE EE NEN NN NEN GR IRE GENS NEED ee ee. When Answering Advertisements Please Mention May Modern Mechanix 141

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The Unholy Search! DID NATURE REVEAL HER SECRET? EDDLERS in God's. affairs, Triflers with sacred things, they were said to be. In musty garrets, in the eerie hours of the night,.they bent low over iron crucibles and their strange smelling contents. By what right did they match human intelli- gence with the forces of the universe, and seek to know their mysterious workings? They were not demons or black magicians, as the superstitious masses of the Middle Ages thought them, but wise men—al- chemists—who disclosed nature’s greatest secrets at a time when the world was in ignorance. They discovered a method to arouse man’s inner powers. MASTERY, DOMINANCE, SUCCESS are secret func- tions of the mind, they learned. Every man and woman, it was found, can attain personal mastership in life, when shown how, for the elements are hidden within them. This Amazing FREE Book Can Help You The Rosicrucians (not a religion) have preserved in their archives for the sincere, this rare knowledge acquired by these daring investigators of centuries ast. Write for your FREE copy of “The Sealed ook’? which tells what it can do for you. It has helped thousands everywhere. Address: Scribe T.N.W. The ROSICRUCIANS [AMORC] California ‘(Not a religious organization) Help Kidneys Clean Out Poisonous Acids Your Kidneys contain 9 million tiny tubes or filters which may be endangered by neglect or drastic, irritating drugs. Be careful. If functional Kidney or Bladder disorders make you suffer from Getting Up Nighls, Neryousness, Loss of Pep, Leg Pains, Rheumatic Pains, Dizziness, Circles Under Eyes, Neuralgia, Acidity, Burning, Smart- ing or Itching, don’t take chances, Get the doctor's guaranteed prescription Cystex, the most modern advanced treatment for these troubles. $10.000.00 depositec with Bank of America, Los Angeles, California, guarantees that Cystex must bring new Vitality in 48 hours and make you feel years younger in one week or money back on return of empty package. Telephone your druggist for guaranteed Cystex (SisseTex) today. San Jose 142 Building Lilliputian Railroads [Continued from page 141] but still furnishes one piece of equipment. Next you pick a locomotive. While you'll most likely want to build the biggest and most powerful looking engine you've seen, if you profit at all by the experience of others you'll start on a small iype suitable for either short passenger or short freight trains. Your choice will have few driving wheels, so that it can easily negotiate the sharp curves, far sharper than scale, that are needed to get around your right of way. You'll con- sider, too, that on your short road you can't pull very long trains and a big engine would look out of place. The power that runs your locomotives will be electricity, with the choice of overhead trolley for electric and interurban type models, outside third rail for steam types, or better still, what is called two-rail distribution. With two-rail sys- tems no source of power is visible, the current getting to the engine down one running rail, returning along the other. All wheels must be insulated from' the axles. Some 60 model railroad clubs meet in the larger cities. Because the average basement or attic furnishes so little room, and there are so many phases to model railroading that many hands can work together on the same layout, many of these clubs have rented large spaces in centraly located buildings, often on railroad property, and have set up club railroad systems. These are usually in O0-gauge, because space permits this size and the larger equipment better withstands lots of use and abuse. The New York Society of Model Engineers runs the oldest and best known of these club railroads, the Union Connecting Railroad, in the Knicker- bocker Building on 42nd St, just off Times Square. Several thousand feet of track, realistic scenery, including bridges and viaducts, standard railroad signaling apparatus, rows of cars and lo- comotives, roundhouse, yards, and stations com- bine to give visitors the impression that they're viewing the capable railroad facilities of sorae Liliputian country. The staff, too, is railroad- like. There are officers, an engineering staff, and an operating staff. The road is run by timetable under the direction of a dispatcher and train- master, and the Brownie system of demerits is used to make up a seniority list by which jobs are awarded. In Springfield, Mass, Oakland, Calif, Mil- waukee, Wis., Portland, Ore, New Haven, Conn., St. Paul, Minn., Los Angeles, Calif., and Maywood, IlL, similar club systems have been built during the last few years, while in many other cities, including Cincinnati and Cleveland, Ohio, Detroit, Mich., Buffalo, N. Y., Kansas City, Mo., Boston, Mass., Washington, D. C., and Baltimore, Md., other "Union" railroads are under way. Because its members are too scattered the largest club of all, the Model Builders! Guild of Chicago, has no club railroad, but holds bi-weekly meetings for Accept No Substitutes! Always Insist on the Advertised Brand!

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the exchange of ideas and to listen to outside speakers. To bring some kind of generally accepted standards into technical matters such as scale and gauge, dimensions of small parts and working dimensions of switches and curves, the National Model Railroad Association was formed in 1935. Several regional associations, mostly affiliated with the N. M. R. A., foster local work along the same lines. The National Association and the local clubs also promote fellowship. Regardless of voca- tions, religion, and politics, model railroaders have one uniting interest, one common subject, the source of endless conversation and debate. They meet first, perhaps, by mail, perhaps by hearsay, and an introduction is like a meeting of old friends. District meetings, sectional displays of equipment and inter-club interchanges when equipment from one city is brought en masse to run on the rails of another city’s club railroad are becoming common. All add to the fascina- tion and fun of one of the most interesting and comprehensive of hobbies. MODEL RAILROADERS! ENTER “MIDGET MIKE” LOCOMOTIVE CONTEST Here is your chance to win a valuable piece of model railway equipment simply by send- ing the Model Railroad Editor a photograph of your “Midget Mike” after constructing it according to the plans which appeared in the March, April and concluded in this issue of Modern Mechanix, All pictures must reach Modern Mechanix by June 15, 1937, to be considered. No photographs will be returned. FIRST PRIZE A complete kit for building a Hudson type 00 gauge locomotive exactly like the one shown here. SECOND PRIZE A complete kit for building an 00 gauge air conditioned Pullman car, including all hardware and trucks. THIRD PRIZE A complete kit for building your choice of any one of seventeen types of freight cars, including all hardware and trucks, FOURTH AND FIFTH PRIZES A complete kit for building your choice of any one of seventeen types of freight cars, but less hardware and trucks. Send entries to MODERN MECHANIX PUB. CO. 1501 Broadway New York City When Answering Advertisements Please Mention May Modern Mechanix Are you in a rut, tied PL a factory job, vith little PS or no prospect for ad- vancement? Will you be ==— doing the same thing years from now? will you train for a better job, more pay and prosperity? Pre- pare now, to enjoy everything that big- ger earnings make. possible. ^ The Road to Advancement RAFTING In every walk of life practical training in DRAFTSMAN- SHIP will prove valuable, Even if you don’t accept a job as a DRAFTSMAN, you will be money ahead by taking Engineer Dobe's Course. You will be amazed at the speed with which you can learn in your own home in your spare time by Engineer Dobe's PRACTICAL METHOD, JOBS NOW OPEN In all industries, Drafting leads the way. In Aviation, Electricity, Building, Machinery, Automobile, Draftsmen must be used, and their work comes first. Recovery in industry &nd building is definitely on the way. Many trained Draftsmen will be needed on better jobs at better pay and shorter hours. Prepare NOW} Learn at Home From an Engineer I will teach you my practical method that has been success- ful with thousands since 1900. I will furnish you with all tools and a drawing table. I will teach you in a very short time by mail in your spare time until you actually have a desirable Draftsman’s job, or prepare you for better pay in the job you now have. No High School or previous expe- Tience needed. You must be entirely satisfied with my personel training UNTIL COMPETENT and until assisted to a position, MONEY BACK, Start NOW f N ta: H and get the training. Prepare § Complete Outfit M mote Poy and a better job. Size 20 x 25 inches en e coupon be 9" DAY! Time is money! Don't delay! No obligations! FU R N IS H E D , * ENGINEER DOBE, Div. 4735, e ET ii. = Send me your free book, “Successful Draftsmanship” and er- L plain how you will assist me to a good position as a draftsman. : Nanie sei scs ga : Address s a a Post Office asummumum 143

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BONNEY TOOLS are the Finest that money can buy Write for Catalog M The NO. 25- ENGINEERS: WRENCH SET of CV. Chrome-Vanadium Steel, chrome-plated, consists of six double head, open-end wrenches with openings from: 3p! to 1. - ? Bonney Forge & Tool Works Allentown, Pa. PrintYourOwn Cards, stationery, advertising, labels, paper, circulars, tags, ete, Save money and time. Sold direct from factory only. Junior Press, $5.90. Tob Press, $11, Power, $149. Do " popular raised printing like en- gracing. with any of our presses. ? Print for Others. Big Profits Pays for itself in_a short time. Fasy rules sent. Write for free catalog of outfits and all details. The Kelsey Co. K9. Meriden, Conn. BUD YOUR OWN Electric Outboard Motor from oid auto generator. We show you how. Yariable Speed. Light welght and Silent. storage battery. Dime brings complete plans and catalog. Wind Driven Cottago Light Plants, Motors, ete. LEJAY MFG., 15 1514 \ W. Lake Minneapolis, MInn. HAVE YOU A RADIO IN YOUR CAR? Did you know that the Radio Builders’ Manual describes a fine 6-tube auto set? Why not get a copy and build your own? Send 50c today to MODERN MECHANIX POBLISHING CO. GREENWICH, CON y EA WORKS FROM ANY BATTERY! Amazing! New ELECTRIC ARC WELDER h any storage battery. Generates reri DOKN Mac? Welds all metals. “Makes permanent repairs on auto bodies, fenders, radlators, sheet metal, castin nes stronger than before. Low power consumption. A zeal welder's tool, sturdlly built. FULLY GUARANTE! SEND NO MONEY—Comet has tiioussndo of uses in home, pERTase, k shop. ener now. Send, money, ney. CO MET inen Dept, U-154, Cincinnati, O. y MER 144 Accept No Substitutes! Operates from 8 to 12 hours on ordinary Just Another Gadget [Continued from page 33] and J. C. Hershey, with an idea for an auto lock. For nine years they offered the device to motor- car makers and eventually it caught on. Today the auto lock is standard equipment on half the cars produced. When the two brothers sold their rights, according to their attorney, they cleaned up more than $1,000,000 each. Recent annals of Chicago inventors yield still another romantic tale involving a "mistake" which turned out $10,000 to the inventor's good. After devising an automatic pencil, which later became very popular, C. R. Keeran, the inventor, had an idea for an improvement. Papers were drawn up and a patent attorney prepared to rush to Washington. Keeran hurried home to make his required model, but in his haste the dies got in wrong. The result was something not expected, but so valuable that the manufacturer paid the $10,000 for a license to use this accidentally dis- covered feature. Rich in human interest, too, is the experience of another woman inventor, Mrs. Anna J. Green- wich. With her husband and four children, she was for a time on relief in Chicago. Faced with the loss of their home and beset by creditors, Mrs. Greenwich had one hope, a tiny hair curling de- vice, which she had earlier patented. Money was borrowed from a relief agency to help find a market and when introduced to the world by a large mail order house the hair curler went over with a bang. Out of her first profits Mrs. Green- wich wrote a check to cover the relief funds she had received. Towering above a huge manufacturing plant in a Chicago suburb, a tall chimney bearing the name "Benjamin" constitutes a fitting monument to a once humble inventor. When Reuben Benjamin Set out from Iowa State College he had two ideas on which he worked long in a dark basement. One was a light socket which could carry a cluster of lamps without the need for wires to each globe. The other was a swivel screw shell attachment by which extension cords could be connected to a circuit without twisting the cord into a tangle. When Benjamin died in 1934 he was rated among the nation’s most prolific inventors with some 400 patents to his credit, and the big factory where industrial lighting equipment is made is a testimonial to his business ability. In Harvard, Illinois, another factory chimney recalls the labors of a poor tinsmith, Charles E. Hunt, who, a half century ago worked out in his basement shop on Main Street an idea for a hay fork with an automatic tripping device, by which a farmer could fill his barn from the ground with- out an assistant. Five words tell the rest of the story: The business grew and grew. At Knoxville, Tennessee, still another factory chimney is a tribute to a former clerk in a Government Weather Bureau station. Scientific apparatus employing themostatie principles con- stantly got out of adjustment and called for re- Always Insist on the Advertised Brand!

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pairs. When that clerk, W. M. Fulton, sought the trouble, he decided it was due to the rubber bel- lows commonly used to permit expansion when the devices responded to pressure. Fulton de- vised the sylphon, a collapsible metal bellows, later adopted as a vitally essential feature of electric refrigeration equipment. It is used, also, to raise radiator covers on motor cars, when the engine gets overheated. And that former Govern- ment clerk is now a wealthy man in Knoxville. Another chapter in the saga of humble inven- tors whom fortune served well concerns Louis A. M. Phelan, once a Chicago building manager. In odd moments, Phelan worked on an idea for an electric switch employing an inert gas to sup- plant open electric contacts on electrical control apparatus. A glass tube, scarcely bigger than one's little finger, called the mercury contact switch, was the result. For years Phelan made these in a back room and peddled them wherever he could. Even his attorneys refused the share in the business which he offered to liquidate their bill for legal expenses. Just at the right moment the oil burner appeared with a demand for a dependable switch in a tick- lish position. And, to shorten the story, in 1930, when all the world suffered from a "depression," Phelan sold his mercury contact switch to a Minneapolis concern for $1,000,000. Inventors everywhere are finding the present interest in coin-operated vending and amuse- ment devices a rich field for exploitation. Begin- ning in 1930 production of pin and marble games grew overnight into an industry of amazing pro- portions. Twenty of the 25 factories making amusement tables and other coin machines are located in Chicago, where in 1935 their business totaled over $20,000,000. New games, new designs, new mechanical fea- tures are constantly demanded, according to C. S. Darling, secretary of the National Association of Coin Operated Machine Manufacturers. Hun- dreds of inventors, he stated, are relied on to pro- duce the “best sellers” that keep this depression- born business booming. A shooting gallery utilizing the photo-electric cell is a recent development. Pulling the trigger of a rifle, the marksman sends a beam of light to the moving target. The accurate shot hits a photo-electrie cell on the bird, which falls over, automatically registering and totaling the score on an illuminated panel. One unusual award for an electrically con- troled coin machine has come to Alexander Flaunn, of Bridgeport, Conn. Flaunn patented a vending machine which cooks and seasons frank- furters, places them in an automatically slit toasted roll, then transfers the sandwich to a sani- tary wrapper which mechanically closes around the contents and delivers it. In 1930 the American Journal of Sociology in- cluded this machine in its annual list of inventions and discoveries which appear to hold the greatest possibilities for affecting the future course of [Continued. on page 146] When Answering Advertisements Please Mention May Modern Mechanix ILL PROVE IT/-. sust 1 7€ a pay Can Prepare You for a |GOOD-PAYING JOB n RADIO Sprayberry Training does much P i} more than teach you all branches | of Radio, Television, Electronics, H Sound, Etc. It teaches you mod- ern business methods—helps M you make spare time profits WHILE YOU LEARNC-sets you up for an actual start | in a good, money-making profes- sion—backs up every step of your training with com» B plete PROFES- SIONAL RADIO | EQUIPMENT! eee Learn | how the Mest | SUCCESSFUL; Home Training ; N Plan in Radio? JN ACTUALLY SETS; YOU UP, READY FOR > BUSINESS in an} Don't wish for a frood-paying 3 iob. TRAIN FOR ONE NOW he quality of Sprayberr greining is elearly shown by @ the outstanding success of my M students throughout the coun- & iry—and hy the strong words of praise from outstanding leaders § of the great Radio Industry. Send ing. coupon m fon our new catalog. THE; FACTS EARN WHILE YOU LEARN! It is absolutely necessary that you have professional equipment of tlic kind I supply, before you are ready to start making REAL MONEY in Radio, I teach you to use it under į actual working conditions. That's why Sprayberry Training is so easy to learn at home—why many students make extra money on radio work almost as soon as they start their training—and why, upon graduation, they are ready to enter business A'T ONCE for full or part time profits. THE TORE EVER CLIP ACADEMY OF RADIO IMPORTANT COUPON YOU'LL SPRAYBERRY F. L. Sprayberry, President 2541 University Place, N. W., Washington, D. C. I Without obligation on en BVO part, please send gE Free Book, "MORE MONEY *" and other details of famous Sprayberry EY ds. ADDRESS PASTE COUPON ON PENNY POSTCARD AND MAIL TODAY 145

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L500 NEEDED INVENTIONS Concentrate G your talents on inventions that will PAY Ea MONEY. 1936 Edition of 1800 NEEDED NVENTIONS by R. F. Yates tells what Inven- tions manufacturers NEED badly, Describes In detall 1500 Needed Inventions in these field: General Problems; Automotive; El al; chnnical; Chemical; Aviation; Rad Also chapters on the Ten Most Needed Inventlons, and on tific discoverles important to inventors. Simple, practical ideas—one idea from thls book may win you.a fortune. If you want to invent, know what Inventions will pay you the most money. This book tells ou. Keeps you from working on Inventions nobody wants to btt arge cloth bound book, 250 pages, nine blg chapters. Only $2.5 Drop a postal and we wlll send 1500 NEEDED INVENTIONS C.O.D. We pay postage If you send cash with order. If not delighted after 5 days’ examination, return it and get your money back. INVENTORS' SELLING GUIDE How and where to sell fatented or unpatented inven- tions. inventors’ Selling Guide by R. . Yates, noted authority on inventions, gives classified list of nearly 1000 manufacturers who buy ideas. Tells how to sell unpatented Inventions Safely, how to sell chain stores, how to price inventions, selling by correspondence and demonstration, how fo find uy. ers, etc. Tells what an Inventor must know about Law, Royatty, Contracts, Patents Pending, Financing, Gyp Schemes, Selling Methods. Cloth bound book, 224 pages, 15 chapters, postpaid $2 (or -0.D. plus postage.) Satisfactlon guaranteed. BOTH BOOKS FOR $4.00 if ordered at one time gs ad Write for FREE specimen page complete catalog of Valuable books for inventors. Also: Take Out Your Own Patents, 51.00 Making Unpat- ented Inventions Pay, 50c ar E ———— — DONLEY PUBL. CO., 509 Fifth Av. Dept. M5, New York, N.Y. : "12 Modele America's outstanding values in Row Boats, Fishing, Hunting, Outboard Motor and Sail Boats! Will not sink! Low Cost! No work, worry or upkeep cost! Always ready to usel Preferred by lead- ing, summer camps and resorts! Send post card for 24 pase catalog! It's Free! PIONEER MFG. CO., 435 Perry St., Middlebury, iind. ——_—_ -PARKS AIR COLLEGE: PARKS AIRPORT EAST ST.LOUIS, ILL. Offers you college education majoring in aviation Four -96-week courses lead to B. S. degrees in Professional Flight Aviation Operations, Aviation Mechanics, Aeronautical Engineering. 100 acre airport. 14 buildings. 38 in faculty, 260 enrolled. 6,800,000 miles flight training. 1.548 planes. 523 engines repaired end rebuilt in shops. Graduates with all leading evlation companies. Dormi- tories,- dining hall on field. Summer term July 5th. Catalog. Write 10th YEAR REGISTRAR, DEPT. MM-5 PARKS AIR COLLEGE, EAST ST. LOUIS. ILL. BUILD AN AUTO RADIO Send 50c for blueprints to MODERN MECHANIX PUBLISHING CO. GREENWICH, CONN. . 37 MILES ON 1 GALLON OF GAS? A wonderful improved auto gas economizer, which is self- regulating, has been recently brought out. Helps motorist cut gas and up-keep costs, and aids in reducing carbon and getting more power and pick up. Anyone can attach to any auto. Unusual money-saving proposition open for county or state sales distributors. - H NEW IMPROVED GAS ECONOMIZER SENT ON TRIAL | REAL Money P. Nothi ji Agents ey Nothing if it Sales Distributors does Not Save Gas — — á Startling Demonstrator, and help save auto running ex- Astounds Motorists — convinces pense. Sample sent for trial at them. RISING GAS PRICES our risk. Stransky Mfg. Co., make sales easy. Get money- E-600, Pukwana, S. Dak. Send making plan and offer of NO- name and make car today—a le COST SAMPLE. Write quick posteard will do. —be first in your locality. 146 Just Another Gadget [Continued from page 145] civilization. For the inventor that honor is com- parable to making the "All-American" in sports. But other big problems are awaiting solution by inventors. At the last national convention of heating, ventilating and air conditioning engineers in Chicago, part of an afternoon was devoted to discussion of how to keep frost off windows in air conditioned rooms. 'They know what makes the trouble, but await an inventor to stop it and get rich. And other inventors soon will have to be pro- ducing devices sure to be needed in hospitals and Sick rooms where conditioned air will be used in treatment of disease. Research in this virgin field has just been launched at the University of Illinois College of Medicine. After a decade or two spent almost exclusively in amusing the world, radio is now being put to work in earnest. Aside from sending photos around the world by air, it is already doing such astonishing things as killing bugs, catching burglars and curing fevers. B For instance, Dr. Willis R. Whitney, of the General Electric Company in Schenectady, has put radio to use in curing lame muscles and joints. The radio waves heat the body and dissolve de- posits of calcium, a hard, lime-like substance which sometimes gets into the smooth body "oil" that ordinarily lubricates the joints. The ailment is technically known as bursitis, and sometimes called “sand in the gears.” It is an extremely painful disease. Inventors can be certain radio wants to do other things with their help. In the fast strides being made in television, Dr. Vladimir Zworykin, of the Westinghouse re- search laboratories in New York has developed “bottled television,” a new type. His device is a bottle-like cathode ray tube which forms the receiver. The broadcast pictures appear on the bottom end of the tube, and from there are pro- jected on a mirror in view of the spectators. It looks very simple—now that it has been done. Stratosphere exploration has shown the need for a new type of engine, which can operate in thin air where gasoline or steam are useless. Utilization of cosmic rays in the service of man is still another task for the inventor of the future. And how easily this list could be lengthened! Studying patent records for the ten-year period from 1916 to 1925, Prof. Lowell J. Carr, of the University of Michigan, determined that approxi- mately 195,500 inventors had taken out patents in that period. This means one inventor to about every 650 persons in the country. Carr found that one-seventh of the patentees produced about three-fifths of the patents and he ventured the suggestion that only a small percentage of these— “some estimate as low as one per cent"—had any practical utility. Some scholars hold that there should be a moratorium on discovery and invention until society absorbs what we already have and into Accept No Substitutes! Always Insist on the Advertised Brand?

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this discussion a patent attorney injected a new note. “It is useless to call a halt," he said, "and even more so right now. The huge tax bills facing the nation are an urgent inducement to more inven- tions. As payrolls sag under tax burdens for social security and other purposes, manufacturers wil more and more be forced to substitute machines for men." What an optimistic prospect that suggestion opens up for the inventor! Called "The Lady Edison" {Continued from page 58] resident of New York City for about fifteen years. The creative faculties of Miss Henry began to show in early childhood. As a very young girl she exhibited a gift for painting and music, as well as a marked talent toward letters, From childhood she manifested inventive ability, in that she was continually pointing out changes and improvements for everything with which she came in contact. As regards most of these child- hood ideas, however, it should be said that she had an idea simply of what could or should be done, without having worked out the mechanics for putting the ideas into practice. But this inventive trait, early evidenced, was to ripen into the foremost feminine inventor of all time. Inventors almost invariably create things in the same field or art in which they move, but Miss Henry’s career is an exception to this rule. Being typically feminine, some of her inventions naturally relate to the needs of women. A hair curler, a vanity case, a rubber sponge soap holder, and a water faucet which can always be shut off with ease, may be mentioned as typical examples of things she has devised for women. Indicating a broad technical skill, Miss Henry turns her ability from inventing a double stitch- sewing machine, thereby doubling the speed possible on the conventional machine, to invent- ing an improved means of closing a doll’s eyes without placing it in a reclining position, both within a short time period. On October 11, 1934, Miss Henry made appli- cation to the patent office on a movable eye structure for dolls. On October 18, 1934, Miss Henry made an application to the patent office on a device far afield from the eye structure. This time she had developed a means of doubling the speed of a “double stitch sewing machine.” The object of Miss Henry’s work on this device was to produce a machine not only capable of higher speeds than the conventional type, but to make one which would produce the chain stitch by use of rectilinearly reciprocating needles. Having eliminated the bobbin found in the usual machine, Miss Henry’s invention makes possible the manufacture of a machine less expensive and less complicated than the conven- tional type. [Continued on page 148] Know Electricity as Experts Know It—and Get an Expert’s Pay! Recovery has begun! The months ahead are charged with signif- cance and expectation. What will you do to get the jump on the other fellow? Thousands of men have used The Croft Library of Practical Electricity The Croft Library Is a complete electrical educator. It is founded on practice—on 20 years of shirt-sleeve experience—on work as it is actu- ally done. It Is jammed from cover to cover with the kind of hard- headed facts you want. Written so that the peqinner can easily understand lt, yet so sound, so thorough, that it Is tbe daily guide of 59,000 highly paid electrical workers and engineers. Croft tells you the things EOS need to know about motors, generators, armatures, com- mutators, fransformers, circults, switchboards, distribution systems— electrical machinery of every type—wiring for light and power—wirln: of finished buildings—underwriters’ nnd municipal requirements—il- lumination In its every phase—the most improved methods of Uphting = lamps and lamp effects, etc.—how to do a complete job, from estimating it, to completion. No money down—easy payments Fill in and mall the coupon attached and we will send you the entire Set of seven volumes for ten days’ Free Examination. e take all the risk—you assume no obligation. If you decide to keep the books, send $1.50 in ten gays and the balance at the rate of $2.00 a month. Send the coupon NOW and see the books for yourself. ILLI ee SS ILL ee ee = | FREE EXAMINATION COUPON | NS McGRAW-HILL BOOK CO., 330 W. 42nd St., New York | | Send me for ten days’ free examination the Croft Library of Practica] Electriclty. If satisfactory I will send you $1.50 in 10 days and $2.00 monthly unti! the price of $19.50 is paid. If not wanted, I will return the books postpaid. shipment write plainly and fill in all lines.) Name .-.------.-.2l2-2l2-l2..l22--2.2--2-2-6020£94--2-2-2-2-2-2-2-2--- Home Address . l City and State . Position. Name ef Company- —— —- — (To insure prompt | BS bens s : i i Sins us CORONA 1937 SPEED MODEL We've made close to two million Corona Portables— but these new 1937 machines are the finest yet! Amazingly complete, professionally fast and easy to operate, and made to last for years. Dollar for dollar they give you unmatched value. Ask any dealer to show you their many exclusive features— the e(fort- less "Floating Shift," the Touch Selector, Piano Key Action, All-around Frame, ete., etc. And then ask about the new easy-payment plan —as low as $1.00 a week! Lets you pay for it as you use it. Free booklet on request. $c» MAIL COUPON TODAY +ccccseves L € Smith & Corona Typewriters, Desk 5 133 E. Washington St., Syracuse, N. Y. I'm thinking of buying a Corona. Please send free booklet showing rnodels and prices. hn —————— pl ———————————— PLEASE PRINT PLAINLY == When Answering Advertisements Please Mention May Modern Mechanix 147

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BUILD YOUR OWN, WE FURNISH THE PLANS AND PARTS You can build the Jim 1 Dandy Cabin Cruiser—the trailer that has every- thing save Money and have a better trailer. Plans and instructions eas; T to follow and show you how to build a substan, fal chassis and body. “Finish and equip it to sult yourself No special SEIL ior tools res quired. Can be punt in any slze. h $1.00 for these plans today. Include 25c imore. and R X Our Big New 1937 Catalog vailer Bullders Manual—the most valuabl book ever published for Trailer Builders and Owna erm of helpful ideas and suggestions, you ve wanted to know about trailers: te Supplies and Equipment. Everything is here celo d Xon ab the Jowe est, money-savin: ver Batistaction Positively Guaranteed edi highly pleased. Rush 25c for this Valuable Book Today WAUSAU, WIS. REST SALL, RACKETS AT HOME + “wp e EARN MONEY. It's easy, pleasant, profitable work. No experience required. Parm in a FEW MINUTES. I supply everything needed. Earn SPECIAL 859 to $100 cash in your spare fet Permatex Silk Strings 50 time. Act QUICK—write for de- with instructions, postpaid c talls of my big proposition FREE. W. A. BICKEL, Dept. B-5, 809 W. Madison St., Chicago E EC NR AL For those who can't afford the time and expense of a 4year college course, Plea offers a condensed ONE essential Theory ON REQUEST! wy BLISS "n 295 Takoma Ave., Washington, D. C. WHY RENT A BOAT? MAKE YOUR OWN Even a child can build at least one of the many boats that are described in the big new 148-page books How To Build 20 Boats. Send 50c for your copy, n MODERN MECHANIX PUBLISHING CO. GREENWICH, CONN. YEAR. residence training, combinin. and Practice, 45th year. CATALO Largest Assortment of ayaks built & de signed by America's oldest Kayak factory. 20 Models, 6-20 ft., 14 persons; forTouring, Racing, Sailing & Fishing. Cedar Kayaks- Folding Kayaks — Kayak Assembling Kits- Canoes — Children's Playboats = Rowboats— Racing Sculls -Ice Yachts —Aquaplanes — Accessories. New Reduced Prices. NEW HEADQUARTERS 152 EAST 129' ST. Complete Cut-to-Fit Assembling Kits 148 Accept No Substitutes! Called “The Lady Edison” [Continued from page 147] Beside having invented a machine capable of about double usual speeds, her device, having no bobbin, makes possible the use of a smaller diameter thread without danger of breaking, because of short length loops in the sewing operation. In 1930 Miss Henry made application for a patent covering a duplicating attachment for typewriters whereby several copies could be made at the same time as the original, without the use of carbon paper. The device, suitable for attachment to any typewriter, would make a maximum of four “original copies,’ each the result of a standard ribbon between sheets, according to patent issued December 1, 1936. The attachment is entirely separate from the rest of the machine, and may be removed when. desired. When copies are not desired, the device may be taken out of service without affecting the typewriter. These original copies are especially useful in courts where carbon copies are not considered as competent evidence. One of her inventions for women was the snap- on parasol. Through this novel idea milady may have an umbrella to match any frock. The frame or handle of this umbrella is not limited to one cover but you may have any number and in new colors as fashion dictates. One can take off the cover to dry, and the cover and frame both benefit. If the cover becomes soiled it may be snapped off and dipped in gasoline. It is indeed a versatile umbrella, simple, clever, and practical —a “snap” and off comes the cover; a “snap” and on goes a new one. The radio and even toys and dolls have not escaped Miss Henry’s quest. Her patented method of making toy animals and dolls with inflatable rubber inner tubes replacing the old interior stuffings, has revolutionized this particular busi- ness. The idea lends a life-like reality to the toys and greatly reduces their weight. Large dolls, formerly weighing as much as five pounds, are greatly reduced in weight under her method of manufacture. The dolls or animals may be inflated or deflated at will by means of a bulb concealed in the dolls or animals. It has been stated that Miss Henry is “psychic” because inventions appear to her suddenly, com- plete in almost every detail. Instead of working out her inventions step by step, as most inventors do, they seem to appear to Miss Henry right out of the air, as a completed vision. She then directs workmen in making the product, often designing machinery to accomplish this task. After invent- ing the rubber sponge which holds a cake of soap, she invented a machine which would cut the opening in ten thousand sponges a day. Lest one suppose that all Miss Henry’s inventions are but the result of happy thoughts, however, it may be stated that the model for the Protograph, includ- ing time and money expended in its perfection Always Insist on the Advertised Brand?

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cost over $20,000. All of which bears out Thomas Edison's famous statement, "Inventing is the hardest kind of work." Cultured, a lover of nature, poetry and art, Miss Henry is not the type one might expect to find leading the ranks of women inventors. “I invent because I cannot help it—new things just thrust themselves on me," Miss Henry explained in an interview at her residence in New York. And it is about as good an explanation as can be given as to why a woman—and this woman in particular—should indulge in such an unusual profession. Miss Henry possesses a rare combination of business acumen and inventive ability, which is so necessary to the successful inventor. But Miss Henry is not a cold, business centered woman. Although her program is crowded, she is ever mindful of the human side of life. “My friends and the press help me win,” she says. Apprecia- tive of the kind words and faith her admirers shower on her, she in turn passes kindnesses along. One of her original lines reads: A kind word is a flower, placed by a friend in the chalice of a heart. Migraine Cure Claimed Many persons with migraine, or “sick head- ache,” may find quick relief in a drug known as ergotamine tartrate, reports Dr. Mary E. O'Sulli- van of Bellevue Hospital, New York City. She has by this treatment saved 89 migraine patients from "39,000 hours of suffering in the last two years," she declares. 'The alkaloid, ergotamine tartrate, is not a cure for migraine, the woman physician emphasizes, but it has brought relief to all but eight out of 97 patients who have been treated. It completely checked 1,042 headaches in the 89 patients dis- cussed. The drug is injected under the skin by the physician, or it may be taken, somewhat less de- pendably, in tablet form. It should not be taken except under a doctor's orders. “Any disease that will incapacitate an adult, in- terfering with his work for a day or more from one to four times a month is a definite economic liability," says Dr. O'Sullivan. She and others are at work on the cause of migraine under a grant from the Josiah Macy Foundation. Driving Taught In School “Automobile instruction for every junior and senior high school pupil is coming," declares William McAndrew, former superintendent of schools in New York and Chicago, writing in the Baltimore Bulletin of Education. In State Col- lege, Pa., high school students are taken out four at a time and given expert guidance in eight hours of driving and 24 hours of concentrated observation, he points out. y Red Stars in the Atlas Catalog lathe descriptions show exclusive Atlas features provided as regular equipment at no extra cost—savings of over $35 on back geared models. Before you buy any lathe get an Atlas catalog and make your own comparison. DRILL PRESSES $16.45 to $42.45 There are extra values for you in Atlas Drill Presses, too. 4 sizes and prices to choose from with the latest construction features throughout—6 splined spindle, balanced pulleys, depth gauge, built-in switch, ball bearing head, full tilting ground table, Jacobs chuck. Pages 3 to' 12 in the catalog. B New’ LATHE : Manual At last a modern up-to-date manual $2 pages showing lat- est in metal and wood lathes, drill! presses, tools, attachments. the new metals, helpful shop ‘hints and tables. $1. 00 postpaid. ATLAS PRESS CO. 552 N. Pitcher St. Kalamazoo, Mich. Factory Displays at CHICAGO NEW YORK PHILADELPHIA ATLAS PRESS CO., 552 N. Pitcher St., Kalamazoo, Mich. O Kindly send your FREE Catalog. O Inclosed is $1 for new Lathe Manual. Name IE PRU MM EE sien ncn v City: and State: —————— When Answering Advertisements Please Mention May Modern Mechanix 149

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"> BUT LOOK ~ New MYSTERY ‘ae MONEY. BELT a DEFIES THIEVES YOU TO $1 5 A DAY Make sales—profits—galore with new “MYSTERY” MONEY BELT! Carries money with absolute safety, right on the person! Every man wants it—buys on Bight! A high quality dressy Genuine lined Cowhide leather belt with concealed secret money pocket known only to wearer! Pickpockets, thieves and hold-up men cannot find it! No zipper to betray secret. Simple secret demon- stratton brings orders easily—quickly! : SECRECY-—MYSTERY--INTRIGUES EVERYONE Make sales and profits by the ‘‘hatful’’ showing Magic-like SECRET SAFETY FEATURE. Choice of popular, low-priced numbers to supers fine Deluxe belts and buckles. Get details and FREE SAMPLE OFFER. Send no money— just write today. MERCHANDISERS, "edorta Same Quality String f $ Asin Expenslve Racquets Outfit Complete with String, tools and directions TOO * Sent C. O. D., if desired, 15c extra. PRO TENNIS STRING CO., Dept. W-9, HARMON, N., Y. SPECIAL Correspondence Courses in Only RADIO and ELECTRICAL ENGINEERING $ M ELECTRICAL ENGINEERING Covers.comptcte 25 Most modern course, So simplified anyone can grasp quickly. Pre- ares you for secure future. Low Cost! ADIO ENGINEERING Yttra-modern course in radio public ad- ` dress, photo-electric work. Tralns you to be super-service man, real vacuum tube technician. Student pin, gipioma, experimental kit given on limited time offer! Tuition ONLY $25, either course. Ask about deferred payment plan. F R E E! Send name quick for free copies of school catalogs, * etudent magazines, complete details. SEND NOW! LINCOLN ENGINEERING SCHOOL, 931-20 So. 37th St., Lincoln, Nebr. BE A PASSENGER Traffic Inspector TRAFFIC AT ALL-TIME HIGH; MEN NEEDED NOW Railway and Bus Lines are con- Stantly asking for our trained graduates. Our short, home-study course quickly qualifies you, and upon completion we place you at up to $135 per month, plus expenses. to start. or refund tuition. Active Men —19 to 50—eligible. Write for the interesting story of TRAFFIC INSPECTION. STANDARD BUSINESS TRAINING INSTITUTE, Dept. 6105, Buffalo, N. Y. PORTABLE ELECTRO- PLATING OUTFIT DOES SAME HIGH QUALITY. PLATING AS BIG TANK OUTFITS == New _ patented invention. GUARANTEED to PERMANENTLY electroplate Silver, Brass, Nickel, Cop- per, Zine or Cadmium WITH A BRUS. —as easy to apply as a coat of paint. A NON-LIQUID process, always ready for use, quickly applied, and equal to any commercial electroplating. Used in factories, hospitals, work shops, garages, stores, jewelers, etc. Op- erates from dry cells, automobile battery or battery charger—nothing else needed. Retails $3.75 (Silver $7.25). Specify metal finish wanted when ordering or write for full particulars. Money back guarantee. RAPID ELECTROPLATING PROCESS 2135 N. Cicero, Dept. M-5, Chicago, Ill. 150 Largest U. S. Airliner Ordered [Continued from page 61] “Recently we completed a series of experiments in high altitude flying which convinced us of the practicability of seeking higher altitudes. These experiments were carried on in the Northrop Gamma ‘Overweather’ airplane, which was on ex- hibit at the National Aircraft Show. "Whereas our experiments were conducted be- tween 30,000 and 36,000 feet, we do not plan to operate the new planes at this level but expect ultimately to carry passengers at 20,000 feet in these airplanes through the addition of cabin pres- sure equipment. The passenger cabins of these planes will be structurally designed and built for supercharging. “At the present time our Douglas Skyliners are operating at levels between 6,000 and 10,000 feet, and we expect to start operating the new Boeings at about this level. Later when we have been able to adapt the experience gained in high altitudes to the four-engined transports, and when the instal- lation of the necessary equipment is perfected, we will gradually start flying at higher altitudes. “With 3,600 horsepower, the speed of the air- plane will be in the neighborhood of 250 miles per hour at higher cruising levels,” "Rumbatron" To Smash Atom A new type high-voltage atom smashing ap- paratus is now under construction by the Physics Department of Stanford University here which has tentatively been called the “Rhumbatron.” Choice of the name rumbatron has been made to distinguish it from the “cyclotron,” first developed and used at the University of California by Prof. E. O. Lawrence. The rumbairon consists of a cylinder 40 inches in diameter enclosed in a vacuum. Inside the cylinder are a filament and a grid which act like a giant radio tube. Electrical oscillations are set up in the apparatus somewhat similar to the squeals of a radio set except that they have a fre- quency much too high to be heard by the human ear. When electrons are introduced into the cylinder they are accelerated by the oscillating field and, in present design will, attain energies equivalent to 5,000,000 electron volts for a single trip through the cylinder. If additional energy is needed for experiments on nuclear disintegration the elec- trons can be sent on two, three, or as many trips as necessary. An important difference between the new rum- batron and the better-known cyclotron is that the former uses electrons as the bombarding particles while the cyclotron employs atomic nuclei them- selves, which are much heavier. Small models of the rumbatron have been suc- cessfully operated showing that the design is satis- factory for the large apparatus now being built. Accept No Substitutes? Always Insist on the Advertised Brand!

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Yawn Gives Rayon Strength Just as a wide open yawn and a healthy stretch awakens dormant strength in the human body, so textile chemists have discovered that by making acetate rayon (one of the newer artificial silks) “yawn” and then giving it a long stretch, it doubles and triples its strength. Not only that, but they can make the acetate rayon fabrics more resistant to hot water and soap liquors so that it retains its luster and strength on laundering. A. J. Hall, British textile chemist, made the discovery and has patented the method (No. 1,709,470). Since then the acetate rayon textile industry has carried out much additional research work, and numerous patents have recently been taken out on all sorts of improvements on Hall’s dis- covery. Today rayon manufacturers are increasing by using stretch as a force by which their products can be improved. And because of it milady now wears stronger, more wearable and beautifully dyed rayon fabrics. Say the textile finishers: If a cellulose acetate fabric has become delustered, “yawn it" and stretch it. Presto! The luster comes back. Is it week? “Yawn it” and stretch it and you get new strength. Do you want to get novel dyeing effects in the fabric? “Yawn it” and stretch it. Inter- ested in making crepe? Then take the yarn, twist, “yawn it,” stretch it and finish twisting. What is this “yawn it"? It’s a sort of loosen- ing up, a relaxation, of the internal forces of the fiber so that they become reduced and permit the yarn to be stretched, sometimes as much as 500 per cent the original length. Yawning is accomplished by steeping the yarns and fabrics in chemicals like acetone, and acetic acid (familiar in the form of vinegar) which swell and make the yarns soft and plastic. In this state the yarns can be stretched way out like so much taffy. Pairs of rollers, some moving faster than others produce the stretch as the yarn speeds rapidly through the apparatus, Once, the susceptibility of acetate yarns to stretching was regarded by rayon dyers and fin- ishers as a big disadvantage. Today, they thank their lucky stars for it, because they have learned how to put it to work in producing new fabrics. New Paint Remover Formula A paint and varnish remover claimed to be superior to many preparations now on the market may be made from furfural and benzene, it is shown by research of the chemical engineering department at Iowa State College. Furfural is a straw-colored oily liquid made from oat hulls. The formula is two parts furfural and one part a saturated solution of paraffin wax in benzine. When Answering Advertisements Please Mention May Modern Mechanix AUDELS Carpenters and Builders Guides Inside Trade Intormation Íor Carpenters, Builders, Join- era, Building Mechanics and all Woodworkers. These Guides give you the short-cut instructions that you want— including new methode, ideas, polutione, plane, systems and money saving Suggestions. Àn enay progressive course for the apprentice and student. A praetical daily helper and ulck Reference for the master worker, Carpenters every- where are using these Guides as 2 Helping Hend to Easier Work, Better Work and Bet- ter Pay, To get this assiste ance for yourself. simply fil in and mail the FREE COU- Inside Trade Information On: Pon bek elow, How to use the steel squere—How to file and set saws—How to build furniture—How to use & mitre box—How to use the chalk line—How to use rules and scales—How to make joints—Carpentera arithmetic—Solving mensuration problems—Es- timating strength of timbers—How to eet girdera and sills—How to frame houses and roofs—How to estimate costs—How to build houses, berns, ger- ages, bungelows, ete—How to read and draw plens—Drawing up specificntions—How to ex- cavate—How to use settings 12, 13 and 17 on the steel square—How to build hoists and scaffolds— akylights—How to build stairs—How to put on interior trim—How to hang doors—How to lath— lay floore—How to paint WEBBEMRERRERRREREREEEERHEREREHERHEREERI THEO. AUDEL & CO., 49 W. 23rd St., New York City Mail Audela Carpenters and Builders Guides, 4 vols., on 7 days’ free trial, It O.K» J will remit $1 in 7 days, and $1 monthly until $6 is paid. Otherwise I will return them» No obligation unleas I am eatisfied. Name......eees eese eene e hne T eee rer eery AAATCSE. eee ence nance enaceneatae sere eene rhet sse enne Occupation. ———0—S0Z0Z4(4A"————X— References seoa IO «co M, M FANDER Grinds * Drills - Cuts - Polishes Carves - Routs - Saws - Sands Sharpens - Engraves A whole shop full of tools in one for work on all met- als, alloys, bone, resins, glass, stone, wood, etc. Uses 200 accessories. Saves hours of ine tedious work. 13,000 r.p.m. Socket A Cor DC, 110 volts. $10.75 and up, postpaid, 3 Accessories Free. DE LUXE MODEL For constant setvice, nothing com- pares with this easy-to-handle pro- duction tool, Saves time and labor. Fastest, smoothest, most powerful toolfor itstypeand weight. 25,000r.p.m. $18.50 postpaid, 6 Accessories Free, Get a Demonstration at Your Dealer’s or Order Either Model on 10-Days Money- Back Trial. Catalog Free. CRAFTSMAN'S PROJECT BOOK “Pleasure and Profit with a Handee” Easy working plans for making many interesting and unusual projects, 25c stamps or coin. CHICAGO WHEEL & MFG, CO. 1101 W. Monroe St., Dept. H. Chicago, Illinois l LISendCatalog O ProjectBook L1$10.75Handee DDeLuxeModel § l Name --.2---22l-l-2L22-0c-0L-24...ee e O " Re l » Address sas nan AAL N ANANTA 4

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425 POWER— $18.50 Under this Wollensak Microscope the mo:t commonplace object (a drop of pond water, a leaf, a grain of sugar) is revealed as a world of strange tiny belngs struggling for exist- ence. Their every movement is brought to your eyes—-elearly, sharply, magnified 425 diameters. Simple to use, this sturdy in- strument enables you to witness the most amazing miracles of Nature. Costs only $18.50. Other models: 150-power, $12.50; 100-power, $5.00. Both big values at low prices. At stores or direct, postpaid (or C. OQ. D.). $ Money-back guarantee, Write for FREE BOOK! N. v. WOLLENSAK OPTICAL CO. 822 Hudson Avenue, Rochester, TRIAL LESSON in TCC e DRAFTING Get ready now for new money-making opportunities in Drafting. Clean, well-paid work. Send post card for FREE TRIAL LESSON in Drafting. Shows how easy to learn at home by C.T.C. method. We furnish all tools. Write today. CHICAGO TECHNICAL COLLEGE E262 Tech Bldg., (18 E. 26th St., Chicago, T. PHOTOGRAPHY 1 "m Offers you big opportunities Get inio this profitable field! Cash in on the growing demand for expert photographers! Enjoy a fascinating, profitable career. We give you individual, practical tralning that will qualify you as an expert in Commerclal, News, Portralt, Advertising or Motion Picture pho- tography. Personal Attendance or Home Study m COURSES 2rth M Watts E free jon klats in i ew York institute oi otography elORekeYNdehg (0 West 33 St. (Dent, 153) New York ONAN ALTERNATING CURRENT? PLANTS furnish Same as city current anywhere. Operate on gasoline. Run Radio, Water System, Reíri- gerator, all Appliances. Complete, ready to run. . SIZES 350 WATTS UP Easy to install. Available from stock. Ideal for Farms, Camps, Lake Homes, Commercial use. Sizes for any purpose. Write for details. R D. W. ONAN & SONS 1665 Royalston Ave. Minneapolis, Minn. f; p be ANN ‘ OFFERS YOU GREAT FUTURE Demand for trained aircraftsmen in Southern California plants is increasing and already exceeds supply. Curtiss- Wright Technical Institute, Aviation's foremost and oldest school, is located in heart of this activity and specializes In Sheet Metal, Master Mechanics and Aero Engineering. (No flying involved.) Graduates are obtaining immediate employ- ment. Write for details NOW. Curtiss-Wright Technical Institute, Glendale, Los Angeles, Cal. Dept. MM5 LOSS OF HAIR The hair restoring Formula 37 is now available to the Full particulars sent upon general public for home use. request. DERMAGENIC LABORATORY 748 Anglo Bank Building San Francisco, California 152 Accept No Substitutes! Editor's Workbench Chips [Continued from page 28] Modeling the Queen Mary has proved popular with craftsmen and MM plans helped Billy Glenn, of Gastonia, N. C., to turn out the excellent replica shown in this photo. The editor is always glad to receive letters from MM readers, especially when they contain suggestions for future articles. Comments on past issues of MM are eagerly read by the editor and staff in an effort to more accurately gauge the interests of readers, so if you have any suggestions or criticisms, send them along. REM Model airplane fans will be interested in a letter from Edwin Szezypinski, of Erie, Pa. who writes: Dear Editor: I would like to see more articles on the building of model airplanes, especially if you go into detail as you did with your last two models. I enjoy most the articles on aviation and I think the Editor's Work- bench should be longer. Edwin Szczypinski. Keep your eyes on future issues of MM, Edwin. We have several excellent model plane articles scheduled for early appearance. wa From far away Scotland came a letter that out- lines a good way of running a workshop club. Here is the letter: Dear Editor: A number of friends and myself are interested in your magazine. We have a workshop club and are 100% for the advancement of mechanics and in- ventions. The club makes a point of meeting three nights per week and on Saturday afternoons. I hope to be able to send you a photo of our members and workshop in the near future. Alex Rubin. We will be looking for that photo, Alex, and believe many MM workshop fans will be inter- ested in seeing it, too. Regular weekly meetings involving a discussion of many of the projects presented in MM is a sure fire way to hold a workshop club together. Try it, readers. Send in you letters, project photos, and com- ment, readers. Always Insist on the Advertised Brand!

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"Ghosts" Trouble Atoms Ghosts have often been suspected of being at the bottom of strange happenings on this earth. But the main claim of the modern scientist is that he has dispensed with such supernatural explana- tions for earthly events. In the world of modern science a ghost would indeed be a lonely indi- vidual! Nevertheless, some of those fundamental en- titles of which the material world is believed to be composed behave in a very very strange way. Those "bundles of energy" called photons are per- haps the worst offenders. Even the physicist is somewhat at a loss when it comes to explaining the antics of a photon. And as far as the layman is concerned—well, perhaps a photon is as much like an old-fashioned ghost as it is like anything l else! Such seems to be—for purposes of popular ex- planation anyway—the view of Dr. W. F. G. Swann of the Bartol Research Foundation who, speaking informally at the Franklin Institute re- cently, said: “A bullet is a kind of thing which can only be at one place at once and which strikes where it is. The electrons and protons (material par- ticles) are like bullets. A ghost is a creepy kind of thing which can be everywhere always, which only strikes at one place at a time but which can strike anywhere.” And this unpredictable, ghostly, kind of behavior, Dr. Swann went on to say, is characteristic of a photon. . Carrying the analogy still further, the speake went on to describe how these photon-ghosts ter- rify the inhabitants of the atomic world. Par- ticularly potent in this respect are the high- powered ones which accompany the cosmic rays. A picture on this page is one which Dr. Swann used to illustrate his talk. It shows what hap- pens when an especially horrendous photon-ghost meets up with an unsuspecting atom. Except for receiving a severe "mathematical fright" the atom comes through the ordeal without serious harm. But the ghost himself may be so dreadfully annoyed that he actually material- izes—comes to life—in the form of particles of matter. New-born “particles with a punch” are formed which go tearing through the atmosphere ripping the outer structure off other atoms. Jolts Barnacles Off Ship Barnacles and other cumbering growths of plant and animal life can be prevented from ‘forming on the hull of a ship by the passage of a weak current of electricity—less than 10 volts —is the claim of a Danish inventor, Richard Jensen. Mr. Jensen states that his method costs very little, and that it can be applied to piling and other submerged structures as well as to ships. When Answering Advertisements Please Mention May Modern Mechanix This MACHINISTS’ Home-Study Course ss helps men get ahead Newly assembled—specially priced—these five recent books give you the practical facts on modern machines, up-to-date methods you need to advance in machine shop work. Take advantage of the other man’s experience as found in books, to solve your problems, increase your efficiency, with the new Library of Modern Machine Shop Practice 5 volumes—2000 pages—1600 Illustrations (A combined home-study course and reference library) This library of machine shop practice was written for praclical men, It gives you the best methods for every kind of machine shop work. It deals fully with lathes, drills, and other machine tools and their operation, automatic screw machines, speeds and feeds, gear design and production, punch and die work, metal finishing, cete., ete. Plainly written—completely illustrated—the best kind of help to ihe machine-shop man who wants to advance himself. No money down-—special price—easy payments FREE EXAMINATION COUPON McGRAW-HILL BOOK CO., Inc., 330 W. 42nd St., NEW YORK, N. Y. Send me for 10 days’ free examination the Library of MODERN | MACHINE SHOP PRACTICE. If satisfactory I will send $1.50 in 10 days and $3 monthly untill the special price of $1000 E I o in- paid. If not wanted, I will return the books postpaid, | sure prompt ‘shipment write plainly and fill in all lines.) Address .....-- l City and State_. I Position Company m Aa] OR Versi S A CANOE FOR Guns through the glories of game-filled woods—away from the world on the water. You two, a canoe and rippled reflections «alone on a lake with your dreams. An Old Town Canoe brings the wonders of wilderness, quiet contentment, and peacel Our Indian ancestors paddled canoes as quick and responsive as these. But an Old. Town is tougher and eteadier. Safe. Built to bear hard use for years. Write for a cuta- log showing paddling, sailing and sponson models. It is free. Also a fleet of outboard boats, including big, fast seaworthy types. Rowboats. Dinghies. Address: Old Town Canoe Company, 375 Main St., Old Town, Maine. m pen- OCs ‘Old Town Can 153

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COOK and BAKE Without Coal Slips into Any Old Stove, Range or Furnace. No Ashes, Dirt — Twice the Heat, AT SMALLER COST. Cooks a Meal for Less Beats any oil burner ever gotten out “Qui k H t Em cmo uec Heat at without pre. generating ku M ose TURN OF VA LVE Hanely b by "Simple. Turn AGE nN T S 3 ; aX, d Try At Our Risk |, S2tesmen ar all D a0 pAvs' TRIAL. |BIG MONEY M ES A Prove it ends drudgery It’s sweeping the n | | (Pos $ ills country, e z by . fave ‘ign Ried mus | YOUR own “ot Dr ES bc FREE SAMPLE 57° 70s "R^. COOLER KITCHEN FOR AGENTS „|i IN SUMMER and dirt of coal or wood: y what IT SAVE burner offered to one s man or woman in each localit: who. will di Write quick, be first to dear h how to make REAL M. aig ene dense spare or full time—mail 1c postcard MONEY right now, UNITED FACTORIES, E-600 Factory Bldg., Kansas City, Mo, CARTON voor way á ANT A 1S7 DON’T COPY - LEARN TO ORIGINATE! RAYE BURNS will teach you HOW to CREATE ORIGINAL CARTOONS A home that at ee on 85 B rin b pe has 26 lessons and 600 illustrati ime and address for free detaia, Only. NI: BURNS SCHOOL, Dept. F-X, Box 2194, CLEVELAND, OHIO BIG PROFITS RESTRINGING RACKETS AT HOME! WRITE US/ arn big profits restringing tennis E ^ rackets at home, Easy Work perience unnecessary. H your tennis, Paimion Z guash d Send for FREE m FR Cr dei hS lis Co., thst. A Dept. 2353 Chicago, U. S. A. Learn Advertising at Home Make money in advertising. Prepare quickly during spare time, Also earn while you learn. No expcricuce necessary, New easy method. Nothing else Ike it. Send at once fox tree booklet—'*Win Success In Advertising," and require- ments. No obligation. Page-Devis School of Advertising 3601 Michigan fAve., Dept.2055, Chicago, U. S. A. NO LONGER need you guess which kind of worms afflict your dog —or guess which type capsule to use. Pulvex Worm Capsules expel “all three”: Tape and Round, and Hook worms. Now you can be sure of worming your dog correctly. Easily given. No gassing, gagging or harmful effects. Guaranteed, At pet, drug, department stores,75c. PULVEX worm capsutes Accept No Substitutes! Always Insist on the Advertised Brand! 154 Science Finds Aid For Deat [Continued from page 55] disclosed the fact that they all had some perception of sound, but so little that it was considered of no value. After several years, however, a teacher with an experimental turn of mind decided to find out whether those faint remnants of hearing could be reached and utilized. She secured a group hearing aid, learned to use it properly, and yet the youngsters wear the receivers every day, all day, as much as they liked. When they had special periods for speech lessons, she encouraged them to make the utmost use possible of the speech sounds they could get through the receivers. For some time Though born a deaf mute, Miss Frances Woods, pictured above becaine an accomplished dancer. She studied at special schools for the deaf in Youngstown and Columbus, Ohio. She "hears? with her toes, feeling the vibrations of the music which travel through the stage or dance floor. She is pictured in Chicago with Billy Bray, formerly her teacher and now her partner, they could not recognize a single word, but little by little they began to show that language through the ear was taking on meaning. They began to imitate the teacher’s inflection, to speak with more smoothness, to demand that every new word be spoken to them through the phones, over and over. When I saw them, they were chattering like little magpies. It would have been hard for anyone to believe that they had entered school as deaf mutes. Their speech was not perfect—far from it—but it sounded more like the speech of hearing children than any speech I have heard from children with such profound deafness. If I had not seen their audiograms, I could hardly believe that they really heard so little.

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Many children in schools for the deaf have more hearing than did this group. And the schools all over the country are waking up to the fact that the wonderfully improved new hearing aids, properly handled, offer a short cut toward normality that may revolutionize their work. More than half of all the children can be helped by them—some authorities even say more than two-thirds. These hearing aids are the direct descendants of the telephone. 'Thus does Alexander Graham Bell, fifteen years after his death, contribute in still another way toward the normalizing of the group he championed! People who see multiple group hearing aids in use for the first time sometimes look upon them as almost magical. Absurd stories have been published, proclaiming that children who had never heard a word in their lives were able, through these instruments, to hear and repeat everything spoken to them. A minute’s thought will convince anyone that such stories could not be true. Who, if he had never heard the French language spoken in his life, could understand and repeat every word spoken to him, no matter how good his hearing? The ordinary group hearing aid works in practically the same way as a radio. There isa microphone through which the speaker’s voice is transmitted. There are amplifiers to increase the volume, There are receivers to deliver the sound to the listeners. These are individual headsets instead of loudspeakers, and each has its own volume control because the amount of hearing varies in different persons. There is nothing magical about it. If the listener has once had normal hearing and remembers how speech ought to sound, and if he still possesses enough hearing to appreciate the meaning when the speech sounds are sufficiently amplified, he will under- stand through an earphone at once. If he has forgotten the sounds of his native language (and it is amazing to what an extent they can be forgotten even by adults who think they remem- ber perfectly), but can still hear them when amplified, he can re-train his hearing to be use- ful. If he has never heard speech well enough for the sounds to have meaning for him, he cannot learn to make use of very limited hearing, unless he is given the intelligent, patient, per- sistent training that was given the class I men- tioned above. This is not always available in our schools and many children with usable amounts of hearing are still being educated as if they had none. I believe, however, that this will not be true for many more years. The education of our educators in this matter is progressing very rapidly. But what of those who have no hearing? Has Science nothing new to offer them? Yes, there is something for them too. Let me tell about another class. Its teacher has had experience with pupils who were blind as well as deaf. Unable to teach them speech visually, she made [Continued on page 156] =, mm 1 = PI ass = = = EEEE = = sas = [1 E n eA -n a8 OS L-8—32-—1-4— —EI—1 Ta m a -= [—1-2::—.—] mm we eee w = a ae ams amb geai [.. JE 8 i LE jJ m e a BOOKS SENT FREE! LJ ON APPROVAL 5 VOLUMES BRAND NEW EDITION Only 15 minutes a day with these WON- DER BOOKS can prepare you for a good drafting job in less than a year, Mechani- cal and architectural drafting from simple fireienE NUT to jmportant complex pions, step at a time uilt especially for be- Written a ey Gord, ginners, for men with only grammar school- by 22 well known engi- ing. Drafting room practice, PLUS EN- neers and architects, GINEERING, made easy and clear. In- DeLuxe flexible binding, cludes complete course in — blue-print nearly 2,000 pages, Teading. , 1548 blueprints, charts Big Fleld Big Demand Big Pay and diagrams; prepares Competent draftsmen are urgently needed you for a good drafting right now In all building and manufacturing job in mechanical or lines at $30.00 to $75.00 a week. That's just the beginning—FOR DRAFTSMEN HAVE M dere ne THE BEST CHANCES FOR ADVANCEMENT. For Beginners Pleasant, fasclnating work, easy to learn and you mail coupon im- do. Learn quickly with these books—send mediately. coupon for a set and see for yourself. : di ueris consulting membership in the merisan Technica ciet Á These Instruments T5 of thia famous cuclope exp rafting. Many sa; it ds Included than the coat of ths looks ^. ie Worth more Complete set of drawing instruments if you send for these drafting books NOW. These instruments are made of the finest of German silver, are absolutely accurate and are packed in velvet lined leatherette pocket case. Real $10 value, but included with these books. AMERICAN TECHNICAL SOCIETY Dept. D5220, Drexel at 58th St., Chicago, III — — — M — ro — —À — pum mmm. lm —— American Technical Society, Dept. D5320, Drexel at 58th St., Chicago, 1!I. Send for 10 days’ trial New 5 volume set of drafting. I will pay the few cents delivery charges. If I wish, I may return books In 10 days and owe you nothing, but if I decide to keep them, I will send $2.00 after 10 days, then only $3.00 a month until $24.80, the adver- tising price, is pald. Send latest edition and include drawing instru- ments. Name .--.22..222-222-2-22-2---2--22-.--22.22-2-.-.2-22.-22-2-2--2-2-22-2----- Address Attach letter stating ege, occupation, employer's name and address and that of at least one business man as a reference, “Ihave REDUCED _MY WAIST INCHES — WITH THE WEIL BELT!” i- writes George Bailey Wear the WEIL BELT for I0 days at our expense! you will appear many inches slimmer at once and in 10 days if vour walst line is not 3 Inches smaller it will cost you nothing. “I reduced 8 inches" . . . writes Goo, Balley, “Lost 50 Ibs.” writes W. T. Anderson e. , Hun- dreds of similar letters, f you do not 1 REDUCE Your WAIST 3 INCHES in 10 DAYS oo » HH will cost you nothing! NO DIET, DRUGS OR EXERCISES You will be completely comfortable as the massage-like action and gentle pressure of your Weil Belt persistently ellminate fat with every move! 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Tells you about bob, roll, weave, ' snaking,’ nose zm ng, rear vision, Ackorinan steering, tandem wheels, tow car ance, trailer balance, all State laws, American coaches, English Coaches, plumbing, wiring, brakes, step action chassis, parking jacks, welghts, furniture, Ironing the tow car, every engineering detail. Get unvarnisbed traller engineering facts befor ^ i r NOW, $1.00 postpaid, $1.12 C. O. D. ^ "^^ buy or build, Order RAY KUNS, 2 ED C 8 Eastwood Circle, CincInnati, Ohio, NEW OPPORTUNITIES—BIG PAY—STEADY WORK New, Quick, Easy Method. Train at home in spare time at from one-sixth to one-tenth of what is usually asked for home study courses on Diesel Write for FREE literature today. WORTHINGTON DIESEL SCHOOL Dept. 615-E, 1009 Baltimore, Kansas City, Mo. CARTOON! AND MAKE BIG MONEY—AT HOME—BY MAIL! Magazines pay up to $200.00 per cartoon. Get in this NEW FIELD and be your own boss! My 50 lesson—1000 illustration course shows you how. FREE CARTOON MARKETS $ 80 INCLUDED-—only course of its 2 kind. All for[__.-.-----.---. md Free Drawing Set if you act at once. WRITE TODAY—Stamp brings FREE details. MOON GAG-CARTOON SCHOOL Paramount Bida. Dept. A-1, Fall Creek, Wis. Science Finds Aid For Deaf [Continued from page 155] use of vibration, with the astounding result that the pupils could understand her merely by plac- ing their hands against her face. She resolved io try the same thing with deaf children who could see. I observed her class after she had been working with it four years. Any youngster jn it could shut his eyes, place his hand on the teacher's face (or mine—I tried it), and under- Stand any sentence within his vocabulary. And their voices were better, their speech clearer and smoother, and their general information more extensive than if they had been taught without the help of the vibration work. Some day it will be possible to amplify those speech vibrations and make it increasingly easy to use them. In fact, much work toward this end has already been done, but the cost is still too great and the effect too uncertain to make it generally practicable. After all, though, there are not many children deaf enough to require education in special schools. They are only a handful compared to the hard of hearing—those with slight hearing losses, or deafness acquired after the establish- ment of speech. A prominent educator of the deaf says that before the year 1900 the hard of hearing had not been invented! Although their number runs into millions, while the deaf are less than a hun- dred thousand all told, their problems were so much less acute that they simply were not recog- nized. Partial deafness, acquired by a person who has already achieved a normal command of speech and language, is likely to be regarded (by those who have not experienced it) as merely an annoyance. It is so much trouble to raise one’s voice, or repeat several times, for a person who seems to misunderstand so stupidly! Well, if that is the way you feel about it, think about this for a minute. Suppose that every word spoken to you were spoken through a closed window invisible to the speaker. If you turned your head to bring one ear closer to the glass that muffled the sound, your unnatural position would make you seem queer. If you asked for a repetition, the results might be no clearer. If you requested a second, or perhaps a third, you would see irritation plainly expressed in the face confronting you, and if you heard the voice clearly, its tone would be strained, and therefore harsh and unpleasant. Perhaps, after an effort or two, the speaker would look at you contemp- tuously (or pityingly, which is sometimes worse), and go away, or address his remark to someone else. Since most of the population would be on his side of the window, you would often see even, a person whom you knew to be stupid answering glibly a question to which you could give no reply. Or suppose the voice through the window seemed to be telling you that this was B Street, [Continued on page 158] Accept No Substitutes! Always Insist on the Advertised Brand?

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SPORTSMEN S Manual © —NEW 1937 EDITION— - No sportsman should be without a copy of this all- - new edition of the Sports- men's Manual. Whether you hunt, fish, camp or indulge in other outdoor sports you will find in it numerous articles to ;. meet your particular , fancy. In addition to its many outdoor features the new 1937 edition con- RESERVE YOUR COPY NOW tains complete plans for building two sportsmen's 5 O trailers, two boats and C many kinks and short- ‘AT YOUR LOCAL NEWS- cuts for the outdoor man. STAND OR ORDER DIRECT 250 PICTURES MODERN MECHANIX PUBL. CO. Fawcett Building Greenwich, Conn. When Answering Advertisements Please Mention May Modern Mechanix 157

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BROADCAS the liouse—-iniect dio “Ben Made attached In a SEND 10c FOR BIG CATALOG WITH ALMOST 000 PAGES OF BOOKS, NOVELTIES, TRICKS, USEFUL ARTICLES, ETO. BROADCAST thru your radio. TALK - SING - PLAY sta Bernie” or a especial; Not a toy. Put on your own pr. grams at home, parties, club af- fairs, to operate. Price Postpa! ete. Barrels of funt a25 ex Easy This 5s n radio In itself as it Is poss. Lite to gat Lam Es ditions), id phone. Feceplign with It alone within 25 miles of a staton “for up to 100 miles under good conr All you necd is n aerial & car Çompieisi fesemble. with sunersens| tiv eryslal, stand. ba eryacal eun. arm with Receptigh suarantced, 256 ALL WAVE WORLD WIDE RADIOS Remarkahte resuligalmnlc onera. anywhere, ci dignand domestig with rema clency. Each tube, phi 5 to 600 meters. Vireign atat e hort wave, broadcasts, able volume and’ effi set complete without ong, battery oF acr ONE TUBE BA Good nci me. Co 'dphone vol“ malote Kit D wired ready to ore"n'e $2.30. AY/SUPER, ONE TUBE BATTERY SET. Gives belter valume & 'cceptlon. Complete KiL 22.00 Wired, re: [y to operate $2.78. ELECTRIC TWO TUBE. Oper- tes on houso current, Uses no ülve. selective. to operale. 5: gens. Radio & Television Book pHow to build fnexpen- slve crystal sets. elec: tle radio, rad televialer televiaion short. wave inis on building et With à act’ you, cnn SEE na woll ns HEAR miplo home met may Uno eres ONLY 10 € reception, Tells how a hé pg Dull Book of Noise & Aerial | Eliminator "Biirninates aerial and Al, ters electrical disturb- es. Enrreases the res lon from radio and makes f£reater distance fad volume possible. Gearantecd, Price Postpi YACHT CAP Smart, snappy, Just what every oy I5 wearing. Cool and comfortable. white Twill Yacht Cap, with black oltetath poak, Qe sweat band, and braca buttons anchor, Pi gold brald 25 with White Duck Yacht Cap, sup- erior quality duck, white cel» tulold «ap, gol buttons and red, white ani cord, brass d blue anchor on front, State 3B 7 Price_postpai Weeks arter pla fuii bloom. We positively ttobe so. Bloam evory tei guarantee n weeks, ummer er winter, and when three years old the bush will ba a mass ‘of roses beastng from 500 roses on each bush. The flo 101.000 'wers ara in 3 shades — whilo, pink, and crim» aon. cem At leact three, bushes, from a t 3 pkts 250 [RE New Vest Pocket Adding Machine Adds, subtracts, Vides. Docs work Ten million conaclly, chine, Simple ni TOY- Easy to operate. to punch, no levi always visible. mulupties, di of a costiy ma- nota o key! Tto puli. ‘Total Guaranteed for 5 nd Rceurate. Lientying ealeulntor and me sürength.durabili Feliabluty. Compact n E Vivian Win ft and can be carrier about withonr Inconventence. Jx6in. withons_inconvenlence, Ixen EEEE. Åg T Constructed of steel and as a, Ietlme, ht. Weliht7 oz. Tight in vest pocket. $1.50 Price. Pocket Radio $1.00 Amazing midget radio fts in pocket. Weighs 2 " for [5 marc ir. rates in ‘on bides a mone. Pri a rectifier. bub 51.00. Or. Smaller than a ciga ett? package. Sanar- aws and receives all stations with beautiful, — clear Rango 50 — krear ‘under good con. ditions, No sta- tic or noise. Nath- ing to wear out—lasta ents, No crystals ust, New sensitive and hi-eficiency a practical radio. hotels, officea, autos t ACO, Or anywhero. Sinzie Phone B9c, Eg Phone Headset $2.78 Poatpald. INDIAN Mocca. SIN KIT Contains WINS material ali ready cut and instructions: to assemble these moccasins comfortable slip, mers that ave swell for mnd the house 7 Wearing aro even on cold nights, or running around outside. suede. Fun to make. Moccasin Kit Durable Siate size. price SL Midget Bible 2:5 c" Over 200, pares. legible. Eu Said to bring Price m, DGs- étamp. Every word The complete New Tos- 150 fa SILENT DEFENDER, When ging, your voice on programs coming through your own radio set—meke announcements from any wise cracks, Josh and mystify friends, practice crooning, Rudy Valee. World Mike for home use, Yay without too| Votis radio acting, ete. DELUXE MIKE Large, substantia), a metal mile. Practise ra- die singing, broadcast. Ing. programs, ete. thrü your own radio. Renroduces — volce in| loud. clear, tone with- out” distortion. Nem lar table modei=can bel held in hand. Guaran.| teed. Connected with Tbe. ut IOO] S. n PrE LATEST STEPS. De nopu- "W lar. Good dancers are al ) ways admired—~alwavs noi ular guests. Partners wel. come them eagerly. Thonew. est. smartest slepa without a teacher. Don't make excuses when the music starts. Get lola of fan from parties and dance: Ifyou want to become a verfec dancer, sy way. BOOK TELLS Tow to developpoiseandcontrel, Improve rour dance stops. art of holding. now to walk to music. how to lend. la‘est fox trot Steps. Notural and Reverse Turns. the Reverse “Wave. The Quicksiep swaying to music. Wallz. Back- Ward chanzes, the Continental, he famous Kiss dance, the Man- tan, the College Rhumba, the Clarleston, ete. Art of ng'25c. ' Cloth bound a-v edition 46e postpald. How TAP DANCE Why envy Lheeasy rhythm and fascinat grace of ‘Siep'nFetchit. Fred Astaire ete., Tap dance In ONI Y & HOURS by ancweimplifea ‘course by Prof. Wilson, Nó speclal ability needed. Bo ‘smart: Everybody e ping. The whole tow tapping, Dent out a tune with your feet. $ 310 Illustrations Mostensenlovoit.Friendondaro it. Besides. tal Ing ls not only invigorating and 'enter- taining but Is alsoa Fenithful exercise for making the limbs sun- ple and giving A springy , fecling Of fitness to the whole Proe motes zlimnees nature's way—no Pilly, drugs or diethig. Readers say: adgndertul benefit. Thank you foradding ta dancing fomy accomp- J'anmenis.' ie 29c Dotipnid. Cloth" bound "i ary edition 40c Over 75 Wtustrations, COMPLETE BOOK, onl: Complete blueprints 3 alte ferent racers The ong Ilua trated can be bullt for n few dollars. All about racer parts, gears, trangmis- slons. dirt’ track race erg, track regula- tions, blueprints, plans, how to add motor to you! bina at Mati ii, Bed increasing ete., etc. ram Mümed & ^ jammed full of information piana & blueprints. e. Deluxe cloth bound JU-JITS DON'T BE BULLIED The Japanese art of self-defense" Mew, methode, of attack and defense are given, llli that you cannot understand trips, body holds. revolvers. aga! armlochs, headlock, down, sek ` attack holding double them. Deals full throws. | wrist defense strangling, scissors, ^ splits, à, man, knee throw. defense gealns knife, one hand throat grip. defenee ants. thumb inches, Agalnst stomach | throw. knockout. and numerous others. two assall ‘secret nerva earn to broleci yourself uns der ail circumstances with nature's weapons. ce ‘of CP Ju Deluxe cloth "bound LEARN th iah fear end. ary, overcome Deluxe cloth bound sy ex TO HYPNOTIZE See how easily you can master ine secrets of Hypnatism and strange power, Sway others at Will, Influence the ihourhts of nnd be the master of every sib Aton. Moka others love you. strengthen your will power, ban, erty improve your meme bad hab! çe on, 40c. CHAMELEON 25c tures. Tor food. WATCH IT CHANGE COLOR Get ong of these most wonderful of al ‘Watch It change cotor, Webr one on the lapel of your coagas a cuj Shoots out Ils tongue to catch Ries an No trouble to keen. Months without food. About 4 In. ped to any address In Antee safe arrival and live dell Study Its insects Can go for Jong, Shib- mall, We ruar- very." Only 25c SA b: WONDERFUL X-RAY 10c GREAT CURIOSITY! With It You can apparently see, the ones in the penci), even transparent. Always ready for | use. Only 10 c ppd. fingers, lead Ing the flesh scems BLANK CARTRIDGE PISTOL REVOLVER STYLE Patterns edaftor [atest qn of Revolver. pearance alone will scare aburglar. Takes22 Cal. Blank Cartridges obtalnable eyorywhera. Great protection against burglars; trampy, doza. Have Itlayingaround without thedanger attache hed toothar revolvers, Fincfor 4tsofJuly, New Years, suze work, starting pistol, - , Medium ire 50c, $1.00. "Blank eartridi E s SO fawnoy type) Soc. 'S rapes Express bo! Wow! Whata bargain! Re: enuine Field Gi ion’ Center ce quick, one Fr focussing. Permits full, un- hampe! eyed vision that Elves remarkable Scope and clarity» Swell for nature tue dy. Wiking, sports, and. a. million other — things. Complete with eord, 49- packed ín box, ONLY’ A powerful nigh Rr4de Air Pletol Saeed A ud e et size. Fires BB a &hotobtainable anv. | where. Very powerful yet perfectly safefor bovstohan- dic. Two styles. Single shot Pistol or Rereate-. The Ae Te ter fires LOO shots in one. loading. "The Single Shot shoots rifle Darts and BB Shot. and durable; nil metal parts nickle ural graln wood stocks. Front an Beiter than an air rife. hi Single Shot Pistol $2.50: d express col 100 Shot Pistol $5.00 Wero Vislon : aii Poy Pose er. telescope” for >S only 25c! Swell for outdoors, naturo study, sports, looking nt the moon, Converted info Solar telescope = qiie Ing smoked Klass so ou can aee Sun spote, gic. 5" long. | "Prieo 25c. THRIFT d A 3 dial safe lock and Vault. Bank, Just dial (he three numbers and open the vault just Jike any safe. Big and roomv--it measures about 4x2 in. Swell to keep vour Dig. 3 Ie 0 now. Well made lated: nat. Tear sights, lect. desired. With a bunch of thesebills. It Is easy For a person of limited ; Means to appear prosperous by b Hashing aroil of these DIIS the proper time nnd peel« ingota genuine bill or two from the outside of the roll The effect created will be found to be all that can, bo ricos: . 20c, 120 for SOc, or $3: per thousand postes: 9 money, jewelry. ete. In. Construcled of hea’ metal with red an black trimmings. Full structians with each T BANK only 50c postpa THRIFTVAULTSim- lor in aprearance do et the above only made of wel. geg Steel, and stighuy larker, Picked in a box” win complete Alvertioas for openine. Price, pad” 40 bi $1. 25 BOYS! BOYS! BOYS! ig THROW YOUR VOICE! {nto a trunk, under the bed or anywhere. Lots of fun fooling teacher, policeman or friends. THE WONDERFUL VENTRILO a little instrument, fits In the mouth out of sight, used with above for Dird Calls, ete, enn use it, Never gnus, A complete book wi ith A the Ventrilo. Sent Postpnid for only.. Anyone 10c Electrite Pencil writes In gold. sliver, red, yellow, purple, sean. bluc, ete. on leather wood. paper bakelite,cellophane.nilk,rubber. ete., elc, Put your hane, mono. gram or Initials in gold or ai other color on your car, walle golfclubs, fountain pen, statione Dro etc. Printond decorate any- vi wire hove and miris ean arn erua cseh costly br doc ing this for oLher people. Every time you print a name or mono- fiam on nn article you can eag. ly get 25c for it, vet lt costs al, most nothing eXcopt few seconds timet Ensy touse. Justpluginel. ectric light socketand the pencil is ERTL to write. ELECTRITE PENCIL. complete with supp?les! for willing 6 colors. Only $1.00 ccc Everyone wear this big sing with tha (nd gold embiom sure rounded by the Amcr« Ican Eagle! Handsome. F Ter anas State Size. ver appearance 25e. ice, on Biertin Similar US. NAVY RING Spiet ie USN In bold rellof with, anchor, pearance, 28t. Sterling Gold with Sterling Emblem, ELECTRITE PENCIL |FUN LICENSES 10c I rer aniy $1-00. to the CCC rng, Navy Emb:em: iver, $1.00. 14 ut $1.75. Hand one of there (o your frlend and he Willneverforgetyo Y t Hootlogge: Marriage iner’e Cert panish Ath a m Muf] Throwera Ger d Dingers & Grafters Cer eno Armed Drivers & Neekers Cor Pe Certi ert fieMe: A Beo | License Certi Open Any Lock Did you ever tose or fortet vour kevs? Probably many times, Don'tworzy any More about lost ieys (or any keys, for that matter), as these master keys will open almost any ordinary lock. — Five different heys for various types of locks. WIT save thelr coat If youon. ly use them once, but you'll wobably find them so handy thet you'll ulwaya carry them 5 MASTER KEYS Price 25e nt; College Diplom Stock: Certifies RING red. “Sliver” ap: U.S. ARMY RING with Army Sterling Silver, $1.00. 14 kt Sterling Emblem, an effective contras! Similar to CCC rine. only ‘emblem, large, oversize ring. Silver appearance, ase LUMINOUS PAINT, when applied toan f object, emits rays oj white light, render. fnr it visib|o In the darx. The darker tha 4 righter it shines. Simple to yse—you enn do itf Apply some to tho Gold* with dial of your watch so you can tell timo et $1.75, AVIATION RING Aviation to wear. Gold. Price STEAM ENGINE 1n mechan- World's bl; Ical toys. tine. ^ In. h meter. round and hear the vi at value at bli ah by the boller with tae fess, minuten E MONE at top speed) on one fi iine foya otf the üy ghee. hürmicon, Fury festen anteed to run. Engine fully thorraphed ors. Sieonol er vanae, Sire) models ase, Similar to CCC ring, win Emblem. smart, enerey m. that you will be Watch the iywheel spin a- engine puffing hen you Ket the team up. up. All Runs for houra and will run eranl New model which rund on heat, postpai night. Paint peshbuitons switches. ar: thing, everything with it. Smali Hotte, ase, Medium size SOc, Large size 34-00 Sosin: red le repeating silngshot that wi fre 150 stots with lone loading! Designe: curacy. Bulls eye every time, Exwemely powerful and hard hitune—will ro thru a 100 pare magazine. More powerful than anairrifie, Sturdüy con. structed with non slip suedo Teather shot hotder and thick lively cords, 150 BBS. Slingo, the autamatic slingshot, oniy 2e Lubo oL 200 Cippor coat gd BB's, 1c. steam ene la. Light water, and is. blazing Foolproof, and many - Bol) ringing is bcauti. Target, soo. dude "puna ^en BIG ENTERTAINER 35e. Ele 926 Joheg & Ride Boy Electrician 2515 howto b dynamos, motars, radios, telegraph apparatus. telephones. etie eroctric hi 1 alarms, Hs, electric, engine Mlvstrations. Prico Pastpar ete. Sa pages. files, 25 Tricks, lOParierGames, 73 Toasts, ld Storles, 195 Mos ney-mating Sec, reis, 22. Mono: logs.21 Puzzles, Probicms, Corie recitauons. Funny Readings. 10c DEPT. 367 ADDRESS ALL ORDERS FORGOODS ON THIS PAGE To JOHNSON SMITH & CO. EE ios for OUR NEW GATALOS. a on LS C MIGAN e en o for or 25c for the DELUXE Y EDITION with permanent cloth binding. Bigger and better than ever, New ltems—d!fferen* items—thIngs that you never thought existed. Nearly 609 pages of rnaglo, tricks, Jokes, seeds, books, puzzles otc. (BRASS KNUCKLES.) Fit convenlontly over knuchies, Pocket alze, Wt. 2 oz. Aluminum. 25s wash, 2 for 499. Answering Advertisements Please Mention May Modern Mechanix STAMPS AGCEPTED i9,,Leror Pastimes, 13° Flirations. 1099 mes & their Meanings, JO Pleture, Puze Amusmg Experiments. Deaf and Düuibalphabet, Shadoweranhy. Fortune ‘Tel, ler, Fortunes with, Cares. Crystal. Tea, Cup. etc, Hypnotis:n, Ventriloqvism, Cut-outs for Gheckers. Chess, Dominoes, Fox and Geete, en Morris, Anagrams, 25 card — 166 Tri-xs, Crystal Gazing, etc.. ete. Only yoat Civil Service Manual 128,,:9. oJ, pocket Complete examinations, "answers. — Bpplichs tions. reguitements. , Covers Railway Mal Seye Post Qifice gba, Engineering et Service, Custom Service, novelties, is Price boc 159

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Classified Advertisements Rate for classified ads, 18c per word (include name, address and all numbers), per insertion, accompany order and be received in this office April 3rd for the June issue (on sale April 29th). Modern Mechanix Hobbies & Inventions, 1501 Broadway, New York City. Minimum 10 words. Cash must Address Classified Mar., A. C. GENERATORS PRACTICAL changes for automobile generators. See our advertisement at bottom of page 167. Autopower. ADVERTISING AGENCIES ADVERTISE: Get mail-order business, agents. Free assistance. Free Ad- Guide of newspaper, magazine, circula- tions, rates, mailing-lists. Chicago Ad- vertising Agency, 22 West Jackson, Chicago. ADVERTISE—24 words in 250 news- papers $10. Lists Free. Advertising Service Bureau, 4258-B Drexel, Chi- cago. ADVERTISE. 30 words, 25 maga- zines $1.00. Goodall Advertising Agency, 742 Market, San Francisco. FREE NEW advertisers rate guide. Brown Advertising Agency, 140 South Dearborn, Chicago. + AGENTS WANTED NEW Household Product. Makes hard- est household task easy. Amazing. fast repeating 25c seller. Women rave about it. Opportunity to pocket up to $60 in a week with marvelous line of money makers. Everything sent on trial; no money risk. Details free. Albert Mills, 2346 Monmouth, Cincinnati, Ohio. SEMLDIESEL oil conversions for auto, truck, tractor, other gasoline motors save 75% fuel cost. Guaranteed. Agents wanted. Details and Free Trial Offer. Dies-L-Gas Sales Co., 109-F, 420 Market, San Francisco, California. AGENTS: Smash go prices. Santos Coffee 12c Ib. 4-oz. Vanilla 8%4c, Razor Blades 10 for 8%c. 100 Sticks Chew- ing Gum 12c. 150 other bargains. Premiums. Experience unnecessary. Carnation Co., MN., St. Louis, Mo. NEW WAY of Ironing! Abolishes scorching and fires. Saves electricity. Eliminates kinks, snarls. No lifting. 150% profit. Sales guaranteed. Samples furnished. Neverknot, Dept. 5-H, 4525 Ravenswood, Chicago. MAKE More Money Taking Orders; Shirts, Ties, Hosiery, Raincoats, Uni- forms, Dresses. Sales Kit Free! Ex- perience unnecessary. Nimrod Com- pany, Department 132, 4922-28 Lincoln Avenue, Chicago. d BIG Money Applying Gold Initials on Automobiles. Easiest thing today. Free Samples. Also, Sideline Salesmen for Name Plates and Tire Cover Transfers. *Ralco", 1084 Washington, Boston, Mass. GOLD Reflecting Window Sign Let- ters. Penny Each. Large izes. Easily Applied. New Styles. Absolutely Beautiful. Free Samples. Atlas Sign Works, 7941-G Halsted, Chicago, Ill. 1000 BARGAINS, Drygoods, Notions, Drug Sundries, Specialties, Novelties. Agents undersell stores. Free catalog. jobbers, Dept. 1798-A, 930 W. Roose- velt, Chicago. WHERE To Buy At Wholesale 500,- 000 articles. Free Directory and other valuable information. Maywood MM. Publishers, 925 Broadway, New York. 107 PLANS for making $20-$100 weekly in home or office business of your own. Descriptive booklet free. Elite Co., 214-G, Grand St., N. Y. 625,000 ARTICLES for Sale Cheap. Lists, 10c. Duffy-Co., Covington, Ky. 160 CHIPPED Glass Sign Making; Mirror Resilvering; Metalware Replating; In- teresting; Profitable. Write—Sprinkle, Plater, 850, Marion, Indiana, GOOD Income Plating Auto Parts, Reflectors, Mirrors by late method. Free particulars and proofs. Gunmetal Co., Ave. A, Decatur, Ill. AGENTS?’ Gold Sign Letters for store windows. 500% profit Free sample. Metallic Letter Co. 426 N. Clark, Chicago. MANUFACTURE product yourself. Chemical furnished prepaid. Quality Chemipal, ¥-20030 Russell, Detroit, lich. PUNCHBOARD MEN—Puat and Take Jars. Samples, details free. Tom Thumb, Dept. MM, Nauvoo, Ill. SELL Novelty fun cards, novelties, etc. Samples, list 10c. National, Box 500H, Cincinnati. AMERICAN POLICE JIU JITSU KNOCK 'em cold. Learn Police Jiu litsu. 13 secret knockout blows without fists. Illustrated course by world Ííamous instructor. Price 15 cents. S. J. Jorgensen, 281 Maritime Bldg., Seattle, Wash. AUTOMOBILES 100 MILES for 25c!—Economy—Per- formance— Mileage. Semi-diesel conver- sions for all gasoline motors, $5.00 up. Deal direct with manufacturers. Special complete units for Ford and Chevrolets. Learn basic facts; illustrated litera- ture free. Des-A-Gas, 1719 Addison, Berkeley, California. AVIATION GET INTO AVIATION. Air trans- port pilots get up to $7,000 per year; mechanics, $2,500. Learn at this Gov- ernment approved school Write for complete information. State age. Lin- coln Flying School, 4002 Aircraft Bldy., Lincoln, Nebr. AEROPLANES, New Production, $98.00. Easy payments. Propellers for aeroplanes, boats, sleds, wind-driven generators, $2.50 up. , Send 25c for more information. Universal Aircraft Co., Fort Worth, Texas. $120 BUILDS real midget biplane, single seat 15° span. Complete kits, knockdown, finished, semifinished. Large blueprints, instructions $2 postpaid. a L. Robinson, 640 Eagle, Buffalo, BROTHER, Can You Spare a Dime? If you can, send it to me and I'll send you my Low-Priced Aviation Mate-ial Catalog. (Canada 20c.) Karl Ort, 646 W. Poplar, York, Pa. INEXPERTENCED workers, apply for aviation jobs now. Full salary while learning. Details for stamp. Airploy- ment, Box 553, West Los Angeles, Cali- fornia. AIRPLANES, $50 up. Terms. Crack- ups, salvage. Directory 25c. Aircraft Directory, Athens, Ohio. AMBITIOUS Young Men interested in entering Aviation as Apprentices, see ad on page 27. BABY CHICKS AS WORLD'S Largest Chick Pro- ducers, we can save you money. Big Catalog Free. Colonial Poultry Farms, Pleasant Hill, Mo. BIRDS—PETS AMERICAN Canary Magazine. Monthly. $1.00 yearly. Sample 15c. 2839-M North Halsted, Chicago. BLUEPRINTS METAL TUBE Midget Radio, the last word in compact radio receivers. You can construct this set even though your knowledge of radio is limited by follow- ing the large pictorial blueprints avail- able, from Modern Mechanix Publ. Co., Greenwich, Conn., at 50c postpaid. $700 BUYS all materials for your home. Send 25c for design folder, details. Dana Co., Box 1381, Indian- apolis, Ind. BOATS HOW TO BUILD 20 BOATS—The big new edition contains twenty differ- ent up-to-date plans for sailboats, ice- boats, rowboats, outboards, cruisers, and speedboats. The price for the book, 50 cents, makes each plan cost only 214 cents. Order your copy from Modern Mechanix Pub. Co, Fawcett Bldg., Greenwich, Conn, LATEST Boat Sensation! 20-lb. Mead "Ki-Yak," snappiest thing afloat. As- semble it easily from complete factory- cut kit; best buy in the market. Free —$6 Paddle given with first Ki-Yak purchased in your town—hurry. Rush 10c for Catalog. Mead Gliders, 15 South Market, Dept. MC-37, Chicago. KAYAK Construction Kits $9.45 up. Catalogue free. Jamestown Specialty Company, 377-M, Titusville, Pa. BOOKS & PERIODICALS SPORTSMEN’S MANUAI,—The out- doors man’s guide containing scores of practical articles by America’s leading outdoor writers, covering every phase of fishing, hunting, camping, and trap- ping. This book, edited by Robert Page Lincoln, will make that next vacation a dozen times more enjoyable. Price 50c at your newsstand, or order directly from Modern Mechanix Publishing Co., Fawcett Bldg., Greenwich, Conn. FREE! _ Profusely illustrated booklet, “Scientific Wonders." Contains Draw- ings, Photographs and Diagrams show- ing marvels of Movies, Power, Tele- vision, Nature, Ingenious Inventions, etc. Also many fascinating articles on Mechanics, Astronomy, Biology, Chem- istry, Engineering, etc. Metro, Dept. 2105, 70 Fifth Ave., New York. BOOKS! BOOKS! BOOKS! No matter what you want in the book line I can fll your order. Í you cannot find the books you want, send 25c in silver for my book catalogue today. Levi Bryant, 654 East 44th Street, Chicago, Ill. FREE—Send for list of new technical books at sensational discounts. P. Winn, 124 West 23 St, New York. BUSINESS OPPORTUNITIES PLASTEX INDUSTRY needs manu- facturers on small scale and for big production of Religious Statuettes, Art Goods and Novelties in Plastex and marble imitation. Cheaply and easily made in our guaranteed rubber moulds. We cooperate in selling goods. You are just in time for big 1937 business now _ starting. Interesting booklet mailed FREE. Plastex Industries, EH Washington Ave. Dept. R, New ork. Accept No Substitutes! Always Insist on the Advertised Brana!

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WITH This Simplified Manufacturing Service — Superior Formulas, you'll easily make—-sell latest, most popular, money-making Specialties. Ali Lines, duplicating, surpassing Nationally ad- vertised seasonable products, Valuable “eye-opening” literature Free! Miller, Chemist, 1706-MCB, Tampa, Florida. WE START you in business, furnish- ing outfits and instructions, operating “Specialty Candy Factory” home. Men and women, earn $25.00 up to $60.00 weekly, all or spare time, ooklet free, Hillyer Ragsdale, Inc., Drawer 110, East Orange, N. J. (Estab. 1908.) MAKE artificial marble, glossy tiles, uncanny. Tabletops, plaques, floors, whetstones, novelties. Cement_secrets, hard, fireproof, inexpensive. Brilliant tile and liquid rubber samples 3c. John H. Payn, 945 Grande Vista Avenue, Los Angeles, Calif. START a Business of Your Own manufacturing, mail order, or local. Full or spare time. Either sex, light work, good pay. Experience unneces- sary. Euvico Service, Walnut, States- STOP squealing! Start growing! Work mornings home, drive in country, or “movies” afternoons! Unusual plan. No canvassing. Prepare for surprise! National Folio-C (Station “D’’), Los Angeles. WANTED Manufacturers, by old es- tablished firm to cast Ashtrays, 5 and 10c Novelties, etc. See page 21 for our offer, Metal Cast Products Co., 1696 Boston Road, New York City. SUCCEED With Your Products. Make-Sell Them. Formulas, Processes. Accurate analyses, Catalog free. A. Thaxly Co., Washington, D. C. REAL money, steady business, manu- facturing modern raised sign letters. Sells 1c and up. J. H. M. Company, 12844 Omaha St., Detroit, Mich. office, business of your own. 214-G, Grand St, New York. CHIPPED Glass Sign Making; Mirror Resilvering; Metalware Replating; In- teresting; Profitable. Write—Sprinkle, Plater 845, Marion, Indiana. INVENTION Finance Magazine, 80-H Wall Street, New York, Year sub- scription 60c entered upon promise to pay on receipt of first copy. AMATEUR Cartoonists earn excellent spare time, icati toons for advertisers. 3-N Service, Argyle, Wisconsin. START Own Business, Build $75 Oil Burner for $4. Complete Specifications $1. Radio Service Company, Tracy, Minnesota. RAISE Giant Mushrooms! We buy! Start cellar, shed. Book, pictures free. United, 3848 Lincoln Ave., Dept. 87, Chicago. FREE 36-page book of business oppor- tunities. ark City Book Supply, 1078 Pembroke, Dept. 3, Bridgeport, Conn. SELL by Mail! Books, Novelties! Bar- ains! Big profits! Particulars Free! . Elfco, 438 North Wells, Chicago. NEWSPAPER Clippings Pay. In- structions 25c. Goodall, 60 Lochalsh Road, Inverness, Scotland. cash getting opportunities! Sinclaire, Box 861, Holly- Calif. AMAZING Opportunities. free. Publishing Service, Aurora, Ill. MAKE Own Freet L Booklet Box 101, Products! Literature Sylco, 417-M, Downers Grove, When Answering Advertisements Please Mention May Modern Mechanix Radio Divining Rod Finds Buried Metals g Buried pipes, treasures or other metal objects can be located with this radio divining rod. Light in weight, the de- vice can be successfully operated by one person. Á continual buzz in the earphones indicates when buried metal is approached. BUSINESS OPPORTUNITIES MAIL Order Opportunities—Litera- iure, Silvester & Co., Old Bridge, N. J. CAMERAS & PHOTO SUPPLIES CAMERAS and supplies. Free illus- trated catalog listing everything photo- graphic—still and movie cameras, films, lenses—at tremendous savings. Hun- dreds of bargains, new and used. All guaranteed. We take your old camera or equipment in trade. Write now for your Free copy of our newest money- saving Bargain Book—just out! Limited edition. Hurry! Central Camera Co. (Photographic Head- quarters since 1899), 230 So. Wabash, Dept. 5-J, Chicago. MAKE money in photography. quickly at home. Learn Spare or full time. Easy plan. Previous experience un- necessary. Common school education sufficient. Interesting booklet and re. American School of Michigan Avenue, quirements free. Photography, 3601 Dept. 2048, Chicago. MAKE. Money Selling Snapshots: Dime brings ninety page book, complete instructions, 1600 buyers. Photo- markets, 202-M_ Barrister Building, Washington, D. C. CAPITAL CAPITAL now available for every pur- pose, particulars free. Star Service, Wapakoneta, Ohio. Established 1934. CARTOONING AMATEUR CARTOONISTS — Win $25.00. No drawing ability necessary to win. 26 prizes in all. Rush name on postcard for valuable tips on “How to Make Money, With Simple Car- " Cash Prize Entry Blank and Rules. Send no money, Cartoonists’ Exchange, Dept, C-355A, Pleasant Hill, io. CARTOONING, Sketching, etc, by Alexander Murray. 46 lessons, 600 illustrations, including practice sheets, pens, pencils, drawings criticized, $1.00 complete. Singer Art Service, 1782 E. 100th, Cleveland, Ohio. "United States Secret Service. CARTOONING Course $1.00 Com- plete: 30 lessons, over 500 illustrations, with drawing pens and pencils. Scovell Studios, Box 748-M, Hollywood, Calif. CHALK TALKS LAUGH Producing Program, $1.00. Catalog 10c. Balda Art Service, Dept, 65, Oshkosh, Wis. CHARTERS DELAWARE Charters: Complete in- corporating and organizing service $35. Submitted forms. Chas. G. Guyer, Inc., Wilmington, Delaware. CHEMISTRY SEND 25c for new illustrated chemical Experiment Book with over 300 formu- las and tests. Also receive 32 page illustrated catalog of apparatus, micro- scopes, telescopes and chemicals free. R. Winn, 124 West 23 St., New York. SEND your chemical problems to Ger- man Chemist. Twenty years experience in research work, Box 451, Leominster, Mass. COLLECTIONS CHANCE OF LIFETIME—Valuable Rocky Mountain Ore Collection. Rare Specimens of Gold, Silver, Tungsten, etc. Complete information, Only.$1.00. Reed, 111717 Pearl, Boulder, Colorado. CROSSWORD PUZZLES EARN Money constructing Crossword Puzzles! Easy sparetime work! Details free. “Me. Hippenstiel, Russell Avenue, Bethlehem, Penna. DETECTIVES BECOME a Scientific Detective. Prac- tical procedure taught by Former Agent Write International Secret Service Institute, Hoboken, N. J. (MM-57). DETECTIVES. Make Secret Investi- gations, Experience unnecessary. De- tective Particulars free. Write, George Wagner, 2640-V Broadway, N. Y. BE A DETECTIVE. Make secret in- vestigations. Excellent opportunity, Write for free particulars, Raymond Stults, Elkbart, Ind. DOGS Easy Monthly Payments. Shipped Anywhere. Illustrated Circular, Dime. 405X Gardenia, Royal Oak, Michigan. ‘DUPLICATORS INCREASE Business Now. ''Excello- graph” Rotary Stencil Printer reprints handwrite, draw or $19.75 to $44.00. Terms. Literature Free to Business or Profes- sional Men. Pittsburgh Typewriter Supply, Department K-4, Pittsburgh, a. EDUCATIONAL & INSTRUCTION GET $50 to $87.50 every pay day on Uncle Sam's payroll Many appoint- ments expected soon. Our coaching helps qualify you for Social Security, Liquor Gauger, Meat Inspector, Office Clerk, Stenographer, Typist, Customs, Postal and many other positions, Write today for free book, list of positions, etc. Patterson School, (Arthur R Patterson, former Government ex- aminer, Principal), 435-C Case Bldg., Rochester, N. Y. WORK FOR "UNCLE SAM." Many 1937 appointments. $1.260-$2,100 first year, Men—-women. Prepare now for next announced examinations. Influ- ence unnecessary. Common education sufficient. Full particulars, list jobs and sample tests FREE. Write today sure. Franklin Institute, Dept Rochester, N. Y. 16 —_

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MEN Wanted—Learn ‘Tool & Die Making. Automatic Screw Mach. Machinist Trade. Big Demand. Actual Experience. Expert Supervision. Write for Free Book “M”. Allied Screw Machine Co., Lnc., School Div., 603-9 lake St., Chicago. MEN— Women, investigate working for the Government. Many Social Security Positions. Get ready for entrance tests. Age 18—50. Write for details imme- diately. Instruction Service, 234, St. Louis, Mo. "RESORT IIOTELS Need Men and Women." Prepare now for summer jobs soon open. Literature free. Hotel Instructions Bureau, 2045 S. Snyder Avenue, Philadelphia, Pa. OPERATE a Collection Business. Out- standing opportunity. Quickly learned, Fine income assured. Write Cole As- sociates. Syracuse, New York. FOREST Jobs available $125-$175 month. Cabin, hunt, trap, patrol. Qualify immediately. Write Rayson Service, B-32, Denver, Colo. ELECTRICAL SUPPLIES HUNDREDS of new and rare items. replacement parts and supplies. Send 10c for new, 60-page, wholesale cata- log. Autopower, 412-M S. Hoyne Ave- nue, Chicago. : ENGINES, MOTORS, ETC. WINDING Data, 225 motors, single and three phase. Price $1.00. Motor Data Service, Box 7631, Kansas City, o. FOR INVENTORS INVENTORS. Do you feel you have a valuable invention? A novel inven- tion may produce something salable if patented. Are you groping in the dark -—getting nowhere? Learn how other men with inventions attained success. Write for our FREE Book, ‘Patent Guide for the Inventor" which tells you of fields where inventions bring profits if they are good patented ones. Clarence A. O'Brien & Hyman Berman, Registered Patent Attorneys, 28-D Adams Building, Washington, D. C. PATENT YOUR IDEA. Write im- mediately for two free hooks, “Patent Protection” and “When and How to Sell an Invention." Fully explain many interesting points to inventors and illustrate important mechanical prin- ciples. With books we also send ''Evi- deuce of Invention" form. Prompt service, reasonable fees, thirty-seven years’ experience. Avoid risk of de- lay. Address: Victor J. Evans & Co., Registered Patent Attorneys, 921-E, Victor Building, Washington, D. C. WE SUCCESSFULLY SELL, inven- tions, patented and unpatented. Write for proof, and tell us what you have for sale. Chartered Institute of American Inventors, Dept. 5-B, Washington, D.C. INVENTORS: Send for my free 72- page hook, Conscientious, prompt per- sonal service on all patent matters. Registered Patent Attorney. L. F. Randolph, Dept. 341. Washington, D. C. “HOW To Invent, Prepare, Obtain, Sell Patents." 23 Copyrighted Lessons $1. Free Lesson, Literature. Instruc- tor, 25 South Pearl, Youngstown, Ohio. GET Your Own Patents. Legal blanks. complete instructions $1. Cudding Sons, Campbell, California. FORMULAS FORMULAS—World's Best! Exclu- sive but not Expensive. 40 Years sup- plying Superior Chemical Service to Successful Manufacturers Everywhere. Valuable Literature Free!! Miller, Chemist, 1706-MCP, Tampa, Florida. 162 Accept No Substitutes! Youths Demonstrate Practical Television A homemade television receiver built by Lawrence Friedman and Bruno Alter, above, high school students of Richmond Hill, Long Island, won for them an award from the Science Con- gtess which recently met in New York. The youths are shown here with an engineer in the GE laboratories. ANALYSIS. Research. Newest guar- anteed formulas. Biggest catalog free. Special prices, leads. Gibson Labora- tory, Chemists, EC-1142 Sunnyside, FORMULAS—Unexcelled for biggest- selling, easily-manufactured_ products, all lines. Get special prices. D. Philarst Company, Jefferson City, Missouri. SUCCEED With Your Products. Make-Sell Them. Formulas. Processes. Accurate analyses. Catalog free. A. Thaxly Co.. Washington, D. C. FORMULAS. Information. Analysis. Samples furnished. Dobin Laboratory, 1746 Roscoe, Chicago. ICELESS Ice. Colder! Cheaper! Instructions, 25c. Co., Covington, Ky.. FORMULAS—Latėst money makers. Literature free. D-Belfort, 4042 N. Keeler, Chicago. 550 MONEYMAKING Formulas, 20c. Ideal Book Shop, 100, Park Ridge, Ilinois. FORMULAS—AIll kinds. Guaranteed, Catalog Free. Kemico, 67, Parkridge, Illinois. Cleaner! Dufty- FROG RAISING “RAISE Giant Frogs!” We Buy! Start small pond. Free frog book. American Frog Canning (142-E), New Orleans, Louisiana. HELP WANTED—INSTRUCTION BECOME Business Detective, Earn $1.00 hourly, upwards—spare time. Experience unnecessary; we teach you. Details Free. Business Detective Sys- tem, 1009 Oak, Elmira, N. Y HOBBYISTS HOBBYISTS: Woodworkers, Model Builders, Taxidermists. Se'i your work for cash. For information, list, han- dling, postage send dime. (If proposi- tion doesn’t satisfy you, will return coin.) National Sales, 276 Cedar St., New Haven, Connecticut. HOUSE TRAILERS HOUSE-TRAILERS: Build fourteen, sixteen foot or De Luxe Model in spare time. Detailed blue-prints and instruc- tions, per model $1.85. Parts for sale. Box 1654, Wichita, Kansas. HYPNOTISM PSYCHO-THERAPEUTICS Hypno- tism. Learn the practical side. ar- ticulars 10c. Rokos, 172814 West Gage Avenue, Los Angeles, California. HYPNOTISM, Complete 20 Method Course 25c. Lonk Institute Hypnotism, D-1313, Palatine, Illinois. INVENTIONS HAVE YOU a sound, practical inven- tion for sale, patented or unpatented, If so, write Chartered Institute of American Inventors, Dept. 5-A, Wash- ington. D. C INVENTIONS WANTED SMALL, inventions wanted by manu- facturers. [I’ll help you sell your in- vention. S. Hull, L-7829 Euclid Ave- nue, Cleveland, Ohio. INVENTIONS-—Patented, Unpatented. Bought outright, royalty. Write Arel- | lano-Power Company, 53 West Jackson Chicago, Illinois. INVENTIONS Commercialized. Pat- ented or unpatented. Write Adam Fisher Company, 582 Enright, St. Louis, Mo. MACHINERY, TOOLS & SUPPLIES WHILE they last. 12 inch micrometers with instructions jor reading. 50c postpaid. No stamps. National Ex- change, Box 3, Indianapolis, Indiana. SSS A A MAGIC TRICKS & NOVELTIES AMAZE and Mystify! llundreds of 'Iricks for Home or Stage require no skill. You can perform them—be popular entertainer. Learn fiity good ones by sending 10c for ‘50 Magic Mysteries", and receive Free “Book of 1,000 Wonders", America's most complete Catalog of low-priced Magic. Lyle Douglas, Station A-3, Dallas, Texas. a TEN interesting, hilarious, instructive novelties for 25cl Worth double! Satisfacton guaranteed or money back! L. Specialty House, 3835 Cambridge, Philadelphia, Penna. FREE-—7 Magician's Tricks to all re- questing our new Magic Catalogue. In- close quarter for postage and packing. Supreme Magie Co., Mt. Kisco, N. Y. FREE! 12 amazing card tricks fully explained with new Magic Catalog. Ail sent for 12c. Nutrix, Box 16-P, Station “QO”, New York City. LEARN MAGIC — Large Illustrated Catalog of tricks. You Can Do. 25c. Holden. 222 West 42ud St.. New York. MALE HELP—AGENTS UP TO $6.00 an hour. Amazing Karnu refinishes autos like new without rub- bing, polishing, waxing or painting. Inexpensive—costs little. Wipes on with cloth. Lasts 8 to 12 months. Free Sample. Karnu, Dept. R-84, Cia- cinnati, Ohio. $6.85 HOURLY!—Amazing No.Flatz fixes punctures without patching; makes tires puncture-proof! Instantly, perma- nently seals holes made by nails, etc. Big seller. Free sample offer. No-Flatz, Dept. R-164, Cincinnati, Ohio. MALE HELP WANTED STEADY WORK—GOOD PAY. Re- liable man_ wanted to call on farmers. No experience or capital required. Pleasant work. Home every night. Make up to $12 a day. Wonderful new proposition. Particulars free. Write McNess Co., Dept. 4, Freeport, Illinois. WANTED—Local Buyers to purchase used Office Machines for us. Positively No Selling. Send stamp for details! Pruitt Co., 1105 Pruitt Bldg., Chicago. Always Insist on the Advertised Brand!

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MALE & FEMALE HELP WANTED MEN, Women, Earn $25 Weekly or more at home. We supply materials. Buy your crops, and show you how to grow mushrooms in your cellar, shed, attic, barn. Check weekly. Illustrated Book Free. Write. Washington Mush- room Inc., 2019 2nd, Seattle, Wash., Department 103A. MALE—INSTRUCTION DETECTIVES. Work home or travel. Experience unnecessary. Write, Ameri- can Detective Institute, 2640-T Broad- way, N. Y. MATHEMATICS MATHEMATICS: By my method of computation, anyone can extract any root of any number. No trial divisors, logarithms or exponents. Ten easy lessons. Sent prepaid for $5.00, Arthur Butler, 115 W. Kenneth Rd., Burbank, Calif. MIDGET AUTOMOBILES BUILD a Midget Miller Racer, Com- plete plans for constructing this authen- tic midget automobile appear in the new 1936 edition of How-To-Build-It along with many other interesting home and workshop plans. Scnd 50c for this 148- page book to Modern Mechanix Publ. Co., Greenwich, Conn. MISCELLANEOUS SPORTSMEN! Here’s how to get the most out of your fishing, camping, and. hunting trips. Follow the advice of America's outstanding outdoor writers; men who know and who have brought their yeats of research to you. within the pages of the Sportsmen's Manual, 146 pages of unusual outdoor photo- graphs, plans and suggestions. Printed, throughout, in rotogravure. Send 50c for your copy. Modern Mechanix Publ. Co., Greenwich, Conn. Giant Tanks Will Store San Francisco's Water These workmen are placing reinforcing steel on one of the twenty 75,000 gallon capacity water tanks located in the hills near San Francisco. The tanks will insure adequate water in event of an earthquake or fire. YOUR Ideas developed into practical working model. 30 years successful experience; thousands satisfied custom- ers. Confidential service guaranteed. Bank referentes. Send 3c postage for 32 page book “Making Inventions Pay.” Crescent Tool Company, Dept. T. Cin- cinnati, Ohio. = FULLY Illustrated Circular. 40 engines. Locomotive castings. Sup- plies. Stanip required. Emco, 2417 N. Ashland, Chicago. MONEY IN BUTTERFLIES Listing WANTED—Hear from parties inter- ested gold or silver ores, buried or hidden treasures. Bergman's instru- ment $5.00. Particulars free. Henry Bergman, Box 398MM, Springfield, Missouri. YOU can actually make money with postmarks. No selling involved. Com- lete copyrighted plan, fifty cents, coin. a Jorgensen, 123 East Fifth Street, Duluth, Minnesota. HUDSON Bay blankets, Indian pack baskets, camp stoves, knives, compasses, outdoor equipment. Free catalog. Howe Fur Co, Box KP, Coopers Mills, Maine. TRIANGLE Chart Solves Triangles. Faster iban trigonometry. Review of mathematics included. Send 25¢ in silver. P. O. Box 764, Detroit, Mich. DON'T lose your keys. Metal identifi- cation tags for key rings stamped with v name and address, 25c., The fetal Tag Co., Keysville, Va. YOUR name on 1937 mailing list, one dime. Nu-Way Service, Box 204, Huntingdon, Penna. MODEL RAILROADING BUILD a Model Railroad in 00 gauge (34 inch between rails). A complete catalogue of parts, construction kits, and completed units, One Dime. Nason Railways, P. O. Box 9, Mt. Vernon, N. Y., Dept. X4. 00 GAUGE locomotive “Commodore Vanderbild" 834 inches long (34 inch between rails) 20 volt, ready to run, $5.50 postpaid. Catalog 0c coin. Johansen, Kattesundet 14, Copenhagen, Denmark. MODELS & MODEL SUPPLIES BIG 96-Page Model Engine Catalog, Postpaid 20c. Particulars FREE. Evraymesco, 28 N. Clinton, Chicago. When Answering Advertisements Please Mention May Modern Mechants WHY not spend spring, summer, fall, gathering butterflies, moths. I buy hun- dreds of kinds for collections. Some worth $1 to $7 each. Simple work with my instructions, pictures, price list. Profit—Pleasure. Send 10c for Illus- trated Prospectus terms, before sending butterflies. Mr. a Dept. 19, Box 1424, San Diego, alif. MONEY MAKING OPPORTUNITIES AMATEUR CARTOONISTS—Win $25.00. No drawing ability necessary to win. 26 prizes in all. Rush name on postcard for valuable tips on “How to Make Money With Simple Cartoons", Cash Prize Entry Blank and Rules. Send no money. Cartoonists’ Exchange, Dept. C-355B, Pleasant Hill, Ohio. MOTION PICTURE & SOUND EQUIPMENT MAKE your own Dlack-and-White and Kodachrome Movie Titles with Stamp- O-Title Complete Titling Outfit. Fluid Eradicator swiftly removes lettering. Complete set with type, chemicals, cards and accessories only $5.75. Dept. P.4. Stamp-O-Title Co., 318 East 116th Street, New Vork. LEARN Motion Picture Theatre Busi- ness. Home-Study Training; Manage- ment, Advertising, Projection, Free Catalog. Theatre Institute, 345 Wash- ington, Elmira, N. Y. 8, 914, 16, 35MM Films, Library, Cameras, Projectors, Screens. Bargain catalogues free. Mogul's, 1944-M Boston Road, N. Y. . MOTORCYCLES RECONDITIONED Motorcycles. New —used parts for all makes. Authorized Harley-Davidson Dealer. Whitman Motorcycle & Supply Co., 405-9 South- west Blvd., Kansas City, Mo. giving . particulars, |. SEND dime for sample Motor Racing Magazine, catalog.new and used Indian, English Motorcycles, Auto-Glide Motor Scooters, racing helmets, goggles, parts, supplies all motorcycles. Clymer, 432 W. Pico, Los Angeles, Calif. SEND lic FOR ILLUSTRATED used Motorcycle catalog. Bargains. Largest stock genuine Indian parts and motorcycles. Indian Motorcycle Sales, Kansas City, Mo. ALLOY Pistons Harley, Indian, Hen- derson, Excelsior, new or used parts, cylinder grinding, catalogue and wings pin 10c.. Ballak, 1115 Chestnut, St. Louis, Mo. MUSIC & MUSICAL INSTRUMENTS LEARN PIANO by ear in spare time at home. Easy as ABC. A shortcut to popularity. Free booklet, no obliga- tion. Day-V-Way, $30 Woolworth Building, Dearborn, Michigan. ORCHESTRATIONS, or Harmony; learn at home. 2344 Foothill, Oakland, alif. OFFICE EQUIPMENT a TYPEWRITERS, multigraphs, address- ing machines, adders, dictaphones, dup- licators, sealers, folders. Save half, write Pruitt, 553 Pruitt Bldg., Chicago. OLD GOLD WANTED CASH for old gold, teeth, watches, jewelry. 100% full cash value mailed day shipment received. Satisfaction guaranteed or articles cheerfully re- turned. Information free. Chicago Gold Smelting Company, 300-C Cham- plain Building, Chicago. OLD MONEY WANTED $2000.00 for 1c. We Guarantee To Pay World's Highest Prices, certain 1909 cents $25.00, 1860 cents $500.00, Large cents $2000.00, Quarters $300.00, Gold Coins $7500.00, 1913 Liberty Head Nickel $350.00, certain 50c of 1838— $1500.00, 1853— $750.00, 1915—$13.50, 1921-—$26.00, 1922—$60.00, 1928— $12.00, 1935—$60.00, Half Cents, Hal? Dimes, Foreign Coins, Paper Money, and thousands of others up to $5000.00 each. Know What Your Coins Are Worth. Send Dime for 1937 World's Largest 10c Cornplete Illustrated Cata- logue. Romanocoinshop, Dept. 159, Nantasket, Mass. d $5.00 to $500.00 EACH. paid for Old Coins. Keep all old money. Get posted. Send 10 cents for Illustrated Coin Value Book, 4x6. Guaranteed Buying and Selling Prices, Coin Exchange, Box 18, Le Roy, N. Y. - PATENT ATTORNEYS INVENTORS. Do you feel you have a valuable invention? A novel inven- tion may produce something salable if patented. Are you groping in the dark —getting nowhere? Learn how other men with inventions attained success. Write for our FREE Book, “Patent Guide for the Inventor” which, tells you of fields where inventions bring prolits if they are goed patented ones. Clarence A. O’Brien & Hyman Berman, Registered Patent Attorneys, 28-D Adams Building, Washington, D. C. PATENT YOUR IDEA. Write imme- diately for two free books, *Patent Pro- tection" and “When and How to Sell an Invention." Fully explain many in- teresting points to inventors and illus- trate important mechanical principles; With books we also send “Evidence of Invention" form: Prompt service, reasonable fees, thirty-seven years' ex- perience, Avoid risk of delay. Address Victor J. Evans Co. Registered Patent Áttorneys, 920-E, Victor Build- ing, Washington, D. C. 163

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UNPATENTED Ideas Can Be Sold. We tell you how and help you make the sale. Particulars, with list of manu- facturers and wanted inventions, sent free on request. Write W. T. Greene, 958 Barrister Bldg., Washington, D. C. PATENTS INVENTORS. Do you feel you have a valuable invention? A novel inven- tion may produce something salable ií patented. Are you groping in the dark —getting nowhere? Learn how other men with inventions attained success. Write for our FREE Book, “Patent Guide for the Inventor” which tells you of fields where inventions bring profits if they are good patented ones. Clarence A. O’Brien & Hyman Berman, Registered Patent Attorneys, 28-D Adams Building, Washington, D. C. PATENTS. _ Booklet free. Highest references. Best results. Reasonable fees. Watson E. Coleman, Victor Build- ing, Washington, D. C INVENTIONS Wanted—Patented, un- patented. If you have an idea for sale write Hartley's Inc., Box 928-7], Ban- gor, Maine. INVENTIONS Commercialized. ented or unpatented. Write Adam Fisher Company, 582 Enright, St. T.ouis, Mo. PERSONAL DEVELOP Personality, sex appeal, charm, magnetism. Attain power, suc- cess, Overcome bashíulness, fear, tim- idity. Send for free booklet “Power of Personality.” School of Personal De- velopment, D-1, Woolworth Building, Dearborn, Michigan. HAIR getting thin? Then investigate my “No Hair—No Pay" offer. No obli- gation. Paul Downing, 626 Swetland Bldg., Portland, Oregon. STUTTERING and Stammering cor- rected at home, Booklet free, Paul J. Wolfe, Box 52, Pittsburgh, Penna. PHOTO DEVELOPING DEVELOP and print your own pic- tures. Save time, money with our com- plete $1.49 outfit postpaid or pay post man $1.55 COD. Includes electric ruby lamp, printing frame, photo paper, chemicals and equipment. One of hun- dreds of amazing bargains in our Free, newest, money-saving Bargain Book. Send for it today! Central Camera Co., 230 So. Wabash, Dept. 15-J, Chicago. FINER Finishing. Rolls developed and printed, with One Colored enlargement, or two professional enlargements. All for 25c (coin). Genuine, Nationally Known, Moentone Superior Quality. Moen Photo Service, La Crosse, Wis. OIL COLORED ENLARGEMENT or two 5x7 glossy enlargements with each roll film developed and printed. All for 25c (coin). Badger Studios, La- Crosse, Wisconsin. ENLARGEMEN TS-— 10c, 2— 15c. Colored—25c. Send negative. Henkel, 294 So. Elmwood, Buffalo, N. Y. LARJARGRAPH Reprints: Five (5x7 enlargements) 25c. Cardinal Photo, Summit, N. J. PRINTING PRINT your own cards, stationery, circulars, advertising, etc. “Save money, Easy rules furnished. Print for others, big profits. Junior press, $5.90; job presses, $11; power, $149. Write for details. Kelsey Co, $-57, Meriden, Conn. 164 Accept No Substitutes! Mechanical "Newsie" Vends Daily Papers. These mechanical newsboys have re- cently made their appearance throughout England. A coin de- posited in the slot delivers either a newspaper or favorite magazine. The machíne shown at left is designed es- pecially for vending bound volumes. FREE Card Case! 1,000 Business Cards $1.75. Letter-heads, Envelopes, Statements. Tucker's Press, MM, Box 63, Indianapolis, Ind. 2,000 Business Cards Neatly Printed $1.50. Quick Service. Free Samples. Atlas Distributing Co., 1814 Bedford Ave., Pittsburgh, Pa. PRINTING! Mimeographing! Office Supplies! Reasonable! Catalog! Sylvandale, Downers Grove, Ill. PROPELLERS PROPELLERS Sled-Lightplane, erature 10c. Woodcraft Propeller Hillside Station, Wichita, Kans. 24” AIRPLANE fan propellers, $2.00 postpaid. Fanco, 7716 South Broad- way, St. Louis, Mo. RADIO & TELEGRAPHY RADIO BUILDERS’ MANUAL—A book of radio set building plans and kinks for the home experimenter. Everything from a crystal set to a powerful 6-tube auto radio is included, i cents—order directly from Mechanix Publishing Co., Fawcett Bldg., Greenwich, Conn. RADIO Engineering, broadcasting, aviation and police radio, Servicing, Marine and Morse Telegraphy taught thoroughly. All expenses low. Catalog free. Dodge's Institute, King St., Val- paraiso, Ind. CRYSTAL Set—4250 mile record. Blueprint 18 Distance Models with *Radiobuilder” year—25c. Laboratories, i51-K Liberty, San Francisco. RAZOR BLADES WANTED. Used razor blades, tinfoil, old magazines, etc. Dime brings list of articles wanted and prices. Lantz Com- pany, Broadway, Va. SALESMEN WANTED WANTID—Men for good paying work with a large shoe company. Good pay every day. Free shoes as bonuses to "go-getters". No experience needed. Complete sales outfit sent free. Write Consolidated Shoe System, Dept. G27, Chippewa Falls, Wis. lit- Co., own business on our capital. No hard times; no lay-offs; always your own Hundreds average $3,000 to $5,000 annual sales year after year. We supply stocks, equipment on credit. 200 home necessities. Selling experience unnecessary. Wonderful opportunity to own pleasant, dignified, profitable busi- ness backed by world wide industry. Write Rawleigh, Dept. E-U-MOM, Freeport, Ill. ers, Penny Easily Applied. New Styles. Absolutely Beautiful. Free Samples. Atlas Sign Works, 7941-G Halsted, Chicago, Ill. SELL Celluloid and Cardboard Pricing Tickets, Steel Shelf Moulding, Change- able Signs, Menu Covers. Every store prospect. T. Pricing Press, 124 White St. New York. TATTOOING SUPPLIES TATTOOING Outfits, Supplies—Cata- logue. Guaranteed Remover, “Waters,” M-965 Putnam, Detroit. TELESCOPES, MICROSCOPES, ETC, TELESCOPES, Microscopes, Binocu- lars. Lowest prices. Optical catalog free. Brownscope Company, 234 Fifth Avenue, New York, TELESCOPES, Microscopes, Binocu- lars, Chemistry, Mineralogy. Catalog Free. Teeko, 315-K, Evanston, Illinois. BUILD Reflecting telescopes; catalog free, Instructions 10c. Optical Labo- ratories, Larchmont, N. Y. TOOLS MICROMETER, 14-inch 50c. Premier Products, 449 Gladstone, So. Bend, Indiana, VENETIAN BLINDS FOR YOUR HOME MAKE and sell blinds on spare time or full time basis. Save 50%. We furnish slats, rails, tape, cord, hardware, fin- ished or unfinished. Send 10c in stamps for sketches, instruction sheets and list of materials necessary. Homecrait Venetian Blind Co., 836 Lakeside Pl., Chicago. Illinois. VENTRILOQUISTS LEARN Ventriloquism by mail; small cost, 3c stamp brings particulars. Geo. W. Smith, 125 North Jefferson, Room S-665, Peoria, Ill. WELDING “THE WELDING ENCYCLOPE- DIA" is a welding book worth its weight in gold, for the beginner or old timer or anybody who has anything to do with welding. Illustrated, instruc- tive; describes theory and practice of every welding process. Sent postpaid $5.00. Welders’ Club of America, Box 3432-B, Merchandise Mart, Chicago. NEW and used welding equipment at bargain prices. Circulars 10c (send coin or stamps). 1299 Michigan, Grand Rapids, Mich. DODGE ARCWELDER 25.200 am- peres. Build it yourself. T,ow cost and upkeep. Results guaranteed. — Ce:ti- fied Instructive Drawings $1.00, COD. $1.12. Welders’ Club of America, Box 3432-B, Merchandise Mart, Chi- cago. ARC-WELDING Outfit $1.25. Weld fenders, braze, solder. Lavrow, 4368-W, Warren. Detroit. Stamp appreciated. WIND ELECTRIC PLANTS GENERATOR Propellers, expertly de- signed at factory prices. Universal Aircraft Co., Fort Worth, Texas. WOOD CARVING “MODERN Wood Sculpture." Com- plete instruction book on carving statues $1.00. Lee, Wood Art Studio, Dept. 3, Centerville, Ia. Always Insist on the Advertised Brand!

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ISSUES NEW ETHIUPIAN STAMPS The Italian government recently replaced the postage stamps of Ethiopia with special issues bearing the likeness of King Victor Emanuel. The new stamps are identical in shape to the original issues although not as picturesque. The upper stamps show some of the many attractive wild life scenes which appeared on the stamps issued by the Haile Sellassié government. O STRENGTHEN their claim on Ethiopia, their recently acquired colony, the Italian Government has issued a series of postage stamps to replace those of the former government of Haile Sellassie. The new stamps show a likeness of Italy's King, Victor Emanuel, and are identical in Size to the original Ethiopian issues. While not as picturesque as the colorful Sellassie stamps, the new issues make a valuable addition to any col- lector's album. The stamps are obtainable from practically all stamp dealers. ADLETS FOR HOBBYISTS (See regular classified section for rates and other informatlon.) STAMPS SUPER-WONDER Packet offered, containing 60 different stamps from Afghanistan, Transjordania, North Bornco, Manchukuo, Sudan, Macao, Iraq, Charkhari, French and British Colonies, including natives, beasts, ships, etc., all for 5c to approval applicants. Big illustrated lists included. Kent Stamp Company, Box 872 (G. P. O.), Brooklyn, N. Y. EXTRAORDINARY Free Offer—Turks Caicos, $5 U. 5., Caymans, Western Samoa (native girl), genuine Baden. Everything free to approval applicants enclosing 3c postage. vie Stamp Company, 1-MM Hanson Place, Brooklyn, ZANZIBA R—Also Sudan—Somaliland—Tigerstamps— Togoland—Caribbean | Archer—Algerian—Centralamericans —Britishcolonials—This magnicarocious collection free for 5c postage. Graystampshop, Dept. MM, Toronto, Canada. PRODIGIOUS GIFT! Scarce Perak, Negri Sembilan, Bicolored Airpost, Picturesque Trinidad, Siberia, Selangor, etc.—Free with Approvals! Postage 3c. Saxon Company, Albce Bldg., Brooklyn, N. Y. MAGNIFICENT Mourning Stamp; complete issue com- memorating bloodiest period in history with 20 additional commemoratives only 10c. Friendly Filatelists, 3615 N. Sydenham, Philadelphia, Penna. FREE—25 different North-American to approval applicants, enclosing postage. Sidenburg, Baroda, Mich. ; B AIRMAILS, Mint and Used, Request Price list. Carlcs Kroger, Box 140, Guatemala City, A. STAMP WALLET, with stamps, approvals, 10c. Anderson, 3521 Ogden Ave., Chicago. COINS $5.00 TO $500.00 EACH paid for Old Coins. Keep all old money. Get posted. Send 10 cents for Illustrated Coin Value Book, 4x6. Guaranteed Buying and Selling Prices. Coin Exchange, Box 17, Le Roy, N. Y PEU CALIFORNIA GOLD, quarter size; 27c, $14 size; 53c. Illustrated Catalogue Coins and Stamps 25c, Normen Shultz, Salt Lake, Utah. e FREE: Foreign Coin, Banknote and Large Illustrated coin catalogue, for 4c postage. Approvals sent. Tatham Coinco, Springfield-9. Mass. COINS, Beadwork, Indian Relics, Minerals, Books, Curics, pompe Catalogue, 5c, Indian Museum, Northbrancb, ansas. Andy INDIAN CURIOS LARGE Spanish ship stamp, Azerbeijan Cameroons, Chad, Dahomey, Gabon, Ubang in packet of 57 stamps. All for 5 cts. with approvals. Swedell, 3129 Garfield Ave., Minne- apolis, Minn. STAMPS! 100 diff. 3c; 500 diff. 35c; 1,000 diff. 90cl Illustrated Album (4000 spaces) 22c. Approvals sent. Tatham Stamp Co. (D9) Springfield, Mass. MONTHLY Stamp Magazine, 6 months and 25 foreign stamps, 25c. American Stamp Journal, Cedar Rapids, Iowa. FREE!!! King George Memorial Packet, 15 varieties. Post- age 3c. Roberts, 901-T Fourth, Baycity, Michigan. 13 ARROWHEADS, Spearhead, Lancehead Wampum 99c, Gempoints, Bannerstones, Pipes. 125,000 Bargains. Fires arms—Photolist 10c. Museum, Rutland, Illinois, - INDIAN CURIOS. 100 good ancient Arrowheads $3.00. Tomahawk Head 50c. Illustrated catalog 5c. H. Daniel, Dardanelle, Arkansas. ANTIQUE FIREARMS BLUNDERBUSSES, Matchlocks, Duelling Pistols, Pepper- boxes, Flintlocks, Kentuckys, Indian Guns, Swords. Phoio- list 10c. Museum, Rutland, Illinois. When Answering Advertisements Please Mention May Modern Mechanix 165

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In this department the Photography Editor will answer any question or problem related to cameras of all types, enlarging, printing, developing, taking pictures, and the various phases of home movie making. When sending questions to this department, be sure to include a stamped, addressed envelope in case space does not permit publication of the question and reply on this page. Send all inquiries to the Photography Editor, Modern Mechanix, 1501 Broadway, New York City. TAKING SNAPSHOT PICTURES IN COLORS Having read, with interest, various advertisements on the the am wondering if it is making of home movies in color I book, “How possible to make colored snapshots with a regular camera, Can you offer any constructive advice on the subject? —Carl Thompson, Des Moines, Iowa. Snapshots in colér, for projection on a screen are pose sible, although the making of natural color prints is a rather involved process and should be attempted only by the experienced photographer. Your photographic dealer can supply you with filters and film required for making colored films for projection and all descriptive literature needed. A new color print ocess known as Ruthenburg Color Photography per- mits actual color prints to be taken with an ordinary camera. Án inter- esting article on color photography appeared in the October, 1936 issue of MODERN MECHANIX. NEGATIVES SHOW GREASY DEPOSIT On negatives recently developed I found a greasy deposit present on the surface of the film. Can you suggest the cause for this and how I can prevent future films from reacting in this manner?—Danial T. Johns, "Toronto, Ontario, Canada. The greasy deposit which you men- tion was no doubt caused by an insufficient quantity of acid in the fixing bath. The deposit, itself, is probably aluminum sulphite, If you do not rinse the films sufficiently be-, fore placing them in the fixing bath, the developer may gradually neutralize the acid of the bath resulting in the greasy aluminum sulphite formation. TINTING PICTURES IN COLOR For the beginner, which type of photographic coloring is advised, water or oil colors? I have heard a pro- fessional photographer remark that when water colors are applied they cannot be removed while oil colors can be rubbed off the surface of the picture if the wrong hue is obtained. Can you offer any advice on this subject? — Richard Owens, Miami, Florida. If regular photographic colors are used to tint pictures the oil type is preferred to the water colors since they can be wiped off if a mistake is made in the tinting. Recently a new transparent dye for photographs was introduced to the artists profes- sion which has unlimited possibilities Since it not only produces unusual natural color effects, but can be re- moved with a special eradicator if results are not satisfactory, Instruc- 166 tions fue a plying | color A photographs will be found in o Make od Pictures", Copies are available from he Photography Editor at 50c. HOW TO CLEAN A CAMERA LENS What is the proper method for cleaning the lens of a camera? PHOTO ODDITIES The unusual silhouette scene shown above won for Edward T. De Voe of Berwick, Pa., this month's $5 photo award. The picture was taken by pointing the camera toward the setting sun and using a very short exposure. 'The weird ghost picture is a double exposure and was taken by Mrs. Martha Davis, Hamburg, N. Y. She receives Modern Mechanix’ $3 monthly photo award. My camera lens, being exposed, naturally picks off a considerable amount of dust and in cleaning it Í would like to use the best method possible So as not to scratch the lens surface. —Charles Jackson, Davenport, Iowa. The lens of all cameras should be cleaned from time to time so that pictures are free from haze or dull- ness. The simplest way to free the lens from dust and dirt is to breathe on the glass then wipe it off thor- oughly with a soft lintless cloth or cleansing tissue. If the lens is dusty it should be first freed of the dust by brushing over the surface with a soft camel's hair brush. Optical or eye glass cleaning fluid can be used to remove grease, Clean both sides of the lens by removing it from the Camera. PREVENTING PRINTS FROM CURLING EXCESSIVELY Being a newcomer in amateur pho- tography I have been experiencing considerable trouble in drying my prints flat, After removing the prints from the washing tank and setting them aside to dry, I find upon my re- turn that they are curled up to such an extent that to open them would re- sult in their cracking. How can I overcome this?—John T. Williamson, Chicago, Ill. To prevent the curling of glossy prints they should be dried face down on a polished chrome metal plate or Special enameled ferrotype tin. All photographic supply houses stock these plates. Prints having a dull finish can be dried face down on photo lintless blotters or on cheesecloth stretchers. After the prints have dricd, moisten their backs and place them between cardboards under several pounds pres- sure until dry a second time, To prevent excess curling your prints can be placed in a solution com- posed of one part glycerin to ten parts of water after removing them from the final washing tank. The photography editor will pay $5.00 or $3.00 each for photographs interesting enough for publication on this page. All pictures should be mailed to Modern , Mechanix Publishing Co. Greenwich, Conn.

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GIANT ©) FROG EASY TO START! MARKETS WAITING. Frog legs FRE E in big demand at good prices the year ely D NUFOND GIANTS WEIGH UP TO 3 LBS. EACH round. Millions used yearlyl 4 WE BUY We have one of the largest ° frog markets in the world! Easy to ship. Sell to us in addition to other markets. MEN AND WOMEN starting in every state and Canada. See what others already doing. Small pond starts you. FREE FROG BOOK explains our unusual offer to beginners! Now's the time to begin! Write today! AMERICAN FROG CANNING CO. Dept. 119-EE New Orleans, La. Ideai for all around Spraying work, Sprays Lead Paint, Lacquers, Enamels, Varnishes, Cold Water Paint, Dyes, Insecticides, Disinfectants. Suitable for Homes, Schools, Clubs, Hospitals, Stores, Factories, Office Buildings, and Work Shops. f'urnished complete with Internal Mix Pressure Feed Gun, Quart Aluminum Cup, 2 Nozzles (Fan and Round), adjustable Air Control: Compressor Piston Type, size ll/2xX11/7; Air Cooling Pulley, V-Belt Drive; Filter; Vg H.P., 110 volt, 60 cycle, AC Motor; 8 ft. Cord and Plug; mounted on Base; 15 ft. Oil Resisting Air Hose. j r ‘OUR SPECIAL PRISE $25 So & o EE pris enda Md aiant Éo Sol ti x 40.00. e. omplete, plus postage. | ipping weig| Ibs. old with mone: punc fi E fox Pops Print name and address In margin below, Send $5.00 deposit, bal. C.O.D. y NATIONAL ELECTRIC TOOL COMPANY, Dept. MD, 560 Washington, CHICAGO, ILL. No JOKE TO BE DEAF Build YOUR OWN ~Every deaf person knows that- Wind Driven Light Plant Mr. Way made himself hear his watch tick after bein deat for twenty-five years, withhis Arti- ficial Ear Drums. He wore them day and night. 3 from old auto generator. We show you how. Make They stopped his peed money butlding for others. Light your buildings, play noises, They are invisible tadlo, operate washing machine and other motors. Dime andeorfortable ney for brings complete plans and 1937 catalog. Over 50 other j on batteriea. wri “leo : changes for 6-12-32 and 110 volt plants. Satisfaction ‘guaranteed. Write today. LEJAY MANUFACTURING CO. 1414 W. Lake Street Minneapolis, Minn. "STATE COLLEGE B. S. Degree in 2 years. World famous for technical 2-year courses in Civil, Electrical, 5 Mechanical: Chemical, Radio, a rencutleal S Us gineering; Business Administration an ENGINEERING Accounting. Those who lack high school may make up work. Low tuition. Low living costs. Short diploma courses In Surveying (36 weeks), Drafting (36 weeks). Students from every state and many foreign countries, 54th year, Enter March, June, Sept. and Jan. ANGOLA, IND, Write for catalog. 657 College Ave., available at $125-$175 per booklet on Deafness, rtificialEar Drum MPANY 74 Hofmann Bite, WAY CO Detrolt, Michigan Chipped Glass Sign Making; Mirror Resilvering Replating tableware, reflectors, refinishing chandeliers. Interesting; Profitable; Experience unnecessary. Com- bination outfit. Write—SPRINKLE, Plater, 855, Eu i y : = d an Marion, Indiana. Write for free booklet describing "107 Plans for Operating a Successful Business of Your Own". Make from $20 to $100 a week starting in spare time at home. No peddling or house-to-house selling. B Booklet sent free, and without obligation. Write for your copy today. | month, steady. Cabin. Hunt, trap, patrol. Qualify at once, Get details immediately. ELITE PUBLISHING CO. G 214 Grand St. New York, N. Y.3 : | Dept. BOOK Rayson Service Bureau, D-32, Denver, Colo. TURN SCRAP INTO MONEY OPOWER tells you how in plain, easy, simple, and illustrated instructions detuvo can follow. Change auto generators Into useful, practical A. C. and D. C. generators and motors with voltage from 2 to 1,000 volts, for power, llght, welding, radio, sound, etc. No previous experience nor special tools needed. Generators can be driven by wind, water, fan belt, etc. Already used and endorsed by thousands. Send today for your copy, and also recelve FREE a copy of PRACTICAL ELECTRIX, the new publication for the man who wants to KNOW, BUILD, REPAIR and READ about electrical apparatus and machinery, Book and Magazine postpaid only $1.00. | > AUTOPOWER, Dont. M, When Answering Advertisements Please Mention May Modern Mechanix 167 Chicago. 412 S. Hoyne Ave.,

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Lathe may be Operated from any ordinary lamp socket 3 $85 00: Less Motor Drive : : A Back-Geared Screw- EE : Cutting Precision Lathe. ~ Weight 320 Ibs. Te — No. 415-YA 932” swing by 3’ bed Workshop Bench Lathe with Horizontal Motor Din 1 6" : 16 h.p. Reversing Motor, Switch and belt tension countershaft as shown above.......... Sie Fee ($15.00 Down, $6.00 a month for 18 months) HE new 1937 model 9-inch Workshop Precision Lathe is a back- geared Serew Cutting Lathe and is recommended for the finest, most accurate jobs in manufacturing—in the tool room, in home workshops and automotive machine shops. Workmanship and materials used are exactly the same as used in more expensive models of larger size, mak- ing it represent the greatest value we have ever offered in 31 years of fine lathe building. . Features include Twin Gear Reverse to lead screw, Ball Thrust Bearing on Spindle, Longitudinal Screw Feed to Carriage, Precision Lead Screw for Cutting screw threads—and scores of other important features. Takes 38 practical attachments for milling, grinding, draw-in collet chuck work, and many other manufacturing jobs. South Bend Lathe Works 518 E. Madison St., South Bend, Ind., U.S.A. Witte vor NEW CATALOG 15-K New catalog illustrates and describes in detall this new Workshop Lathe in 8 dif- ferent drives, 4 bed lengths. \ Shows the 38 attachments for \ use with this lathe. A yaluable 5 OTHER SIZES: 9", 11", 15", 15" and 16" SWING IN ALL BED LENGTHS PRICED $97 to $1200 Lathe shown below is No. 117-C 16" x 6’ Quick Change Gear Underneath Belt Motor Driven Lathe with 1 h.p. motor. Complete as shown.$' Weight 2300 lbs........ ate "869 ($87.00 Down, $38.50 Monthly for 22 Months) book for all interested in metal working lathes, This catalog sent free, postpaid. Use the coupon shown below, A South Bend Lathe Works, 518 E. Madison St., South Bend, Ind., U. S. A. Please send the following free, postpaid: O 9" Workshop Lathe Catalog No. 15-K. L] General Catalog No. 96. Class of WOIE ssenosasesusosarovuesnecsececeesoeseces Name ,...eeeeesessosossesoosososesoesescosososeesoe Address sesssesnevevenseeveeooosovesossounecosesoren City. eeeeeeeeeee esee oe oss DBlale cse eno = SOUTH BEND (Declan LATHES 168 Accept No Substitutes? Always Insist on the Advertised Brand}

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Science Finds Aid For Deaf [Continued from page 158] other until 1916, when Boston and Chicago groups were organized, but now there are 160 in this country and Canada. The leagues gained the cooperation of the makers of hearing aids; and now there are wearable ear-phones on the market that make speech really sound like speech, where at first it sounded like the worst of the early phonographs. "They impressed their numbers on the theatre owners and the churches; and now there are hearing aids in many of these places with microphones near the speaker; and those who use the receivers often hear the pro- gram, service, or music as well as anyone else in the audience. They called attention to the large number of school children with slightly impaired hearing; and scientists responded with audiometers to discover and classify hearing losses, and educa- tional authorities began to provide lip reading classes and other special attention for children who needed it. They aroused the interest of the physicians; and men who had contented themselves with treating deafness unsuccessfully began to treat human beings and help them. By recommending a teacher of lip reading, by an introduction to a league for the hard of hearing, by advising in the selection of the right hearing device, doc- tors start their patients on the road to victory over handicap. I do not mean that all of these tasks are ac- complished. On the contrary, in many places they are not even begun. But enough has been done to demonstrate the possibilities beyond all question. Time, and an aroused public, will do the rest. Humans Need Little Sun The vogue for sun baths as a health measure is apparently losing some of its scientific support. The American Medical Association points out that, while sunshine may be beneficial to health, it may also be harmful, and that at least one authority, Prof. Henry Laurens of Tulane Uni- versity School of Medicine, believes the beneficial effects of sunlight have been largely overempha- sized. Develop Cellulose Enamel A new cellulose enamel is on the market in Germany under the tradename of “Emailliola” which is said to be insoluble in water, benzine, benzol, alcohol, turpentine and acetone. The material is highly resistant to weathering acids, alkalies and mechanical rubbing. It is non-in- flammable and can be applied to wood, paper, pulp, cellulose, metals, tile, stone, plaster and glass. When Answering Advertisements Please Mention May Modern Mechanix NEED "IP N NOW! © AIR CONDITIONING ELECTRIC REFRIGERATION ‘We supply trained men. or America's two fastest growing industries. ou can meet on res gutrements, we will NE you in spare time at e for a £ood pay position as an "installation And Service Expert in the Electric Refrigeration and Air Conditioning fields. In addltlon we will Eive you ACTUAL Shop Practice when you grad- uate, and help you to qualify for profitable em- ployment with n exceptionally bright future. Can You Quality? To be seceptablé for enrollment you should) be mechanically Inclined, between ages of 18 and ji W 40, have fair education and be able to furnish N character references. GET FREE BOOK Get amazing facts about actual opportunities for ambitious men in Air Conditioning and Electrice on, Our new Free Book describes ene money manne, op- portunities and tells about our low-cost, ea Y pay of training. rite for your copy today, stating age and wh eh Plan of interests you most. No obligation. UTILITIES ENGINEERING INSTITUTE ®steblishee 400-410 N. Wells St. Dept. 257 Chicago, Iil, fw, CAMERA BOOK FREE? Explains latest in- ventions, methods in photographyand Home Movie Mak- ing, for fun and profits, Offers hun- dreds of amazing, money-saving Bar- gains in stilland movie Cameras Lenses, Films, ete. Alt guaranteed. We take yourold Cameraand equipment in trade! Satis- faction guaran- teed! WRITE! Write for Free Bargain Book! CENTRAL Camera Co. (Est. 1899)230S.Wabash, Dep .J- 15, Chicago WHY RENT A BOAT? MAKE YOUR OWN Even a child can build at least one of the many boats that are described in the big new 148-page book, How To Build 20 Boats. Send 50c for your copy, now. . MODERN MECHANIX PUBLISHING CO. GREENWICH, CONN. Better Built Lower Prices Only Boats With Full Length Spray Rails Keep passengers perfectly dry—even at high speeds. Catalog also shows today's five most popular models of sailboats. Two t big: facto: TALOG FREE ud dof met rep rooy Siate kinig $ Verytastutility model o THOMPSON BROS. BOAT MFG. co. en Ge eoe) CORTLAN a Y- gESHTIGO, Siis. 169

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Kou dao Meat Changing kusines Light weight, noise absorption, and reduced fabricating cost are features of this new molded plastic Western Union Tele- printer housing developed by the General Electric Company. A device for filling sac and vacuum-type foun- tain pens automatically when the pen is inserted in an inkwell without the filling lever on the pen being used. An inexpensive valve adapter that enables farm tractor tires to be inflated with a combination of water and air to obtain maximum traction. A simple lingerie hanger which is shaped to prevent lingerie straps from slipping off of it. Pre-cast concrete slabs for construction of homes, garages, etc., which considerably reduce building time. A gasoline-powered industrial tractor capable of developing up to 3,000 pounds draw pull and which travels at speeds up to 10 miles per hour. A magnetic sep- arator that re- moves minute particles from finely powdered products. A simple col- lapsible miter box that conveniently fits into a work- man’s kit. sad This stainless steel, corrosion- roof water thermostat is designed or general commercial use. 170 Black printing ink that is rub- proof and scratch- proof. A photo-cell de- vice which per- mits testing of headlights in broad daylight. A crack- proof putty that expands and contracts ac- cording to weather conditions. À serviceman’s kit with mask and chemicals to pro- tect against fumes encountered when servicing refrigerators. This compact circuit-breaker pre- vents accidental overloads or short-circuits of radio equipment, Automatic filing machines that enable the op- erator to duplicate any type of key. Hardness testing gauges that measure the hard- ness of any kind of rubber, cork, felt, and similar materials. Rubber insulators for use on mechanical equip- ment to absorb shock and vibration. Crossing gate barricades that stop autos with- out damage to car or driver. Typewriter ribbons made of synthetic textiles that make clear sharp letters and long ink life possible. Uniformly translucent col- ored glass that is seven times as strong as ordinary plate glass. An auto top radio aerial at- tached by suction cups. A ferro-alloy compound checks later corrosion stainless steel. the danger of when welding Editor's Note—Addresses of manufacturers of these and other new products in this issue can be obtained by sending a stamped, self-addressed envelope to Modern Mechanix Publishing Co., Information Bureau, Fawcett Building, Green- wich, Connecticut. Manufacturers are invited to submit material for publication on this page.

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How to get A BETTER RUN FOR YOUR MONEY PERFORMANCE - AND THIS IS WHY: 1 You get more anti-knock fluid (containing lead tetraethyl) at pumps marked *Ethy!" than you get in the best regular-grade gasoline. 2. You get all-round quality (including quick start- ing) that is double-tested —by the oil company and by the Ethyl Gasoline Corporation. 3 You get 100% performance fror your high com- pression engine. 4. You save on oil as well as gas by preventing knock and overheating. NEXT TIME GET ETHYL...A BETTER RUN FOR YOUR MONEY RINT. e p Eo uS

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"A season of opera and concert means my voice and throat must be consistently in perfect condi- tion. Therefore, although most of my smoking is done while | am on vacation, it is all impor- tant to me thai | be careful in choosing my cigarette. | smoke Luckies because | enjoy their taste and, because I feel it is wiser for me to choose a light smoke for my voice." Ales — LOVELY PRIMA DONNA OF THE METROPOLITAN 1507, The Armerican tocco Compan The Finest Tobaccos— "The Cream of the Crop” Helen T ~ * a An independent survey was made recently among profes- sional men and women — lawyers, doctors;-lecturers, sci- entists, etc. Of those who said they smoke cigarettes, more than 87% stated they personally prefer a light smoke. Miss Jepson verifies the wisdom of this preference and so do other leading artists of the radio, stage, screen and opera. Their voices ate their fortunes. That’s why so many of them smoke Luckies. You, too, can have the throat protection of Luckies — alight smoke, free of certain harsh irritants removed by the ex- clusive process ‘It’s Toasted”. Luckies are gentle on the throat. AGAINST IRRITATION AGAINST COUGH

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uble Page Spreads

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A frank man to man talk about PATENTS-INVENTIONS -SELLING INVENTIONS HE world of invention moves on. About a hundred years ago people were saying, ""There's nothing left to invent"—today we know that is one of the funniest things ever said. Just think what has happened in the last hundred years! Autos, radios, airplanes, and thousands of useful, practical devices for home, shop and office have been invented and put on the market. Inventors are con- stantly making the world a better place to live in. Did you see a notice in the paper that an obscure worker, Hans Wach, has invented a simple device to utilize exhaust steam on steam boats. Already, the report states, the steam ship lines have saved more than $15,000 in fuel bills with his invention. Almost in the same breath the Dept. of Commerce announces that it will soon test out a new non- crashable aeroplane, which the average man can learn to fly in a day, which will travel at 110 miles an hour and sell at the price of a cheap automobile. An unknown Seattle man has invented a robot to go 5,000 feet under the sea and recover millions and Who Are Inventors? You'd be amazed at the men we ton- tact in the course of a busy year, Most of them do not consider themselves inventors at all. During their work or leisure they get an idea. They work it ont on paper. They get in toueh with us about Protection, Did you know that a dentist invented the stock ticker, a school teacher the telephone, a farmer the typewriter, an artist the telegraph? Did you know that the crinkly hair pin—sold by millions now—came about because a husband saw his wife twisting tbe old-fashioned straight hair Din to make it stay in place? Poor men who have mo thought of invention now will be financially well-fixed in a few years because of a happy thought that the world could use to advantage. any the average man. trouble, or delay. Can You Answer These Questions? Ask yourself these questions: How do For more than thirty-six years, this firm the Patent Laws protect me? What easy has been helping men with an inventive turn steps ean I take, without cost, to put of mind. We maintain a large staff of trained, myself in position to support my belief experienced speciulists—Registered Patent that Iam the first man to think Attorneys, Draftsmen, and Searchers to help of my invention? Is a Patent our clients secure all the protection to which worth the a model? sell my have it Patented? safe, business-like way to secure financial help? If apply for a Patent how shall I reach people who can market my invention? Can I protect and sell un improvement on some invention that about Patents, Inventions and Selling Inven- has already been patented? These are but a tions that we have learned in our long few of the questions whien usually confront experience. They may save you time, expense, You need the answers! EVEN LATER DISAPPOINMENT. YOU CAN HAVE THEM, without cost, fill in the coupon. No charge, no obligation, =a ü Id right 1936 Victor J. Evans & millions of dollars worth of gold lying at the bottom of the ocean since the days of the early Spaniards, Remember this: For every outstanding big inven- tion there are thousands of small, simple things for use in the home, the office, the factory, on the farm, on every sort of travel conveyance. Little articles like you find on the counters of a 10-cent store, hardware store, drug store, toy and novelty shop. Many Little Ideas Have Big Commercial Possi ies A person finds something he’s using doesn’t work right, or it’s clumsy, or costs too much. He gets a happy thought. He improves the old Article. That’s contribution to human progress. That’s the way that many, many men have reached the goal of financial comfort, independence and even wealth. Most of the things millions of us use didn’t come from the brains of engineers and physicists. They came from the mind and maybe the crude home work bench of Mr. Average Man, busily engaged in earning his bread and butter at whatever chance or circumstance has given him to do. The “little” man's opportunity as an inventor was never greater than it is today. Our Business Is To Help You. Write Us Today cost? Do I need Should I try to Invention before I Is there they are entitled. Fees are reasonable. De- ferred payments frequently arranged. Ques- tions promptly answered. Wrlte us frankly with absolute assurance that what you say will be treated with strictest secrecy. But FIRST, send for the FREE BOOKS shown on the op- posite page. They are filled with faets, pic- tures and stiggestions. They tell you things Simply Write us today. WASHINGTON. D 6 Accept No Substitutes? Always Insist on the Advertised Brand! 115 Mechanical Move- ments Like These Besides many other features and facts there are 115 differ- ent mechanical movements and principles in the big, 48-page Book below. Maybe there is just the idea you need to solve some mechanical problem, Use the coupon or write us a card or letter. FREE BOOKS with 68 PAGES of Facts and Pictures! SMV A VICTOR J. | Evans & Co. NEW BOOK oaut Selling MAIN OFFICE: 220 E, VICTOR BUILDING, INVENTIONS E AE WASHINGTON, D. C i INVENTION i So far as we know, the facts in this booklet have never before been pub- lished by any Patent At- torney. You are given very definite suggestions on "When and How to Sell an Inven- It also B Monadnock Bldg., Chicago 514-B. Empire Bldg., Pittsburgh 1010-B, Hobart Bldg., San Franelsco 736-B, Security Bldg., Los Angeles Send me FREE copies of your books, ‘Patent Protection" and “When and How to Sell an Inventlon." (Note: Same books supplied by any of branch offices listed above.) i Name Street and No..... City or Town....... s. [| maj 7 Other Offices: Hog Woolworth Bidg., New York I When Answering Advertisements Please Mention May Modern Mechanix

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sn STEP NO. ONE Make a rough pencil sketch of your invention, describe it fully, and send it to us for pre- liminary search through United States Patents in the U. S. Patent Office. e STEP NO. TWO Our trained searchers will then make a preliminary search of the pertinent U. S. patents to determine if your invention is probably patentable. s STEP NO. THRE: Our complete report of search and opinion on patentability will be mailed to you with copies of U. S. Patents that we consider nearest to your in- vention. STEP 0. FOUR If you decide to make patent application, for customary fees explained in our booklet, our draftsmen will make drawings and proper papers will be pre- pared, for presentation of your invention to the Patent Examiner in U. S. Patent office. KNOW HOW TO START KNOW EACH STEP TO TAKE Before Going too Far with Your Inventions Very often, the patent procedure is what we call a **simple?* one— as illustrated here. Our FREE BOOK, ‘‘Patent Guide for the In- ventor,’’ describes what to do and how to go about it. Send for it by all means—let us urge, however, that you take the first step (Step No. 1 at left) without further delay. It will prevent wasted work, mis-steps, and going ahead ‘‘in the dark''—your whole patent pro- cedure depends upon the first step. If you have an invention that is patentable—and want to secure for yourself your inventor's sole right to profit from the invention—you can’t afford to lose time in securing the protection of a U. S. Patent. Other inventors may be working on the same thing right now. Should they develop this invention and file patent applieation before you do—the burden of establishing priority will be upon you. Our Big Book—''Patent Guide for the Inventor’’—will tell you the quiekest possible way to secure Patent Proteetion for your invention, SEND FOR IT TODAY! Immediate Search Necessary A Search at the U. S, Patent Office will disclose one of three things: That you have hit upon an entirely original invention—that you have suggested patentable improvements upon an existing invention—or that your invention has been anticipated throughout, and you should drop it. You should have this information at once. The next steps (the whole procedure of obtaining a patent) will be thoroughly ex- plained to you in our FREE BOOK. Our FREE BOOK tells everything you need to know about patents. We will mail this book upon receipt of your letter requesting search —or if you want to read it before having search made, simply fill out the coupon on opposite page. FREE RECORD OF INVENTION eoe This FREE Record of Invention Form ene ables you to make in convenient form a sketch of your invention and have it wit- nessed in a manner of value to you should the occasion for evidence arise, MAIL THE COUPON TODAY and ob- tain our FREE BOOK and Record of Invention Form. CLARENCE A. O'BRIEN & HYMAN BERMAN 317-Z Adams Bldg. Washington, D. C. Registered Patent Attorneys Before U. S. Patent Office 10 Accept No Substitutes! Always Insist on the Advertised Brand! DELAYS ARE DANGEROUS IN PATENT MATTERS The Free Book shown here was prepared for inventors, to show them exactly what steps they must take to secure a PATENT. ONCE. If you have an It will tell you exactly how an application for a Patent is made, what information you invention, you should send for this book AT must furnish your attorney, and what steps he must take in order to protect your interests. Re- member, inventing an article is one thing —securing the exclusive right to manu- facture it, use it, or sell it is another. Without a U. S. Patent, you cannot expect to reap the profits that your invention may make possible, Send at once for this book. After you get that, you'll know exactly what to do to protect yourself. WHAT A PATENT DOES FOR YOU Every year thousands of Patents are granted. Very few, however, represent the discovery of entirely new principles. Most of them provide new methods of do- ing some everyday thing in a better way —changes for greater efficiency, useful- ness, adaptability, or beauty in some pre- viously Patented thing. These IMPROVE- MENTS are Patentable if new, and ac- tually represent new inventions. These improvement Patents offer large chances for profit if commercially useful. The business world wants improved products and services. WE SERVE YOU QUICKLY AND SECRETLY Anything you write us or send us is strictly confidential between us. All letters and drawings are kept in strong, steel, fireproof files, which are open only to ourselves or authorized members of our staff. We have se- cured patents for inventors located in every state in the Union. Our organi- zation is a large and efficient one. Our practice is confined entirely to Patents, Trade-Marks, and Copyrights. We have had years of experience in Patent Matters. When you place your invention in our hands, we are in posi- tion to proceed at once to secure pro- tection for you, Our fees are reason- able, and, if you desire, we can arrange convenient terms of payinent, IMPORTANT! Please understand that you are not under the slightest obligation in send- ing for this book. We will mail it, together with the Record of Invention form, the same day we receive your request. Use the coupon to save your- self time and trouble. After that, vou will be in position to proceed or not as you choose, to make your application for a patent, ee gum mmm erry THis FREE Book eooo el Mow How your Patent Ap- plication is made; e what kind of sketches or drawings are nec- essary; what other papers must be made out; how the Patent Laws protect you; why it is important to avoid loss of time in getting your application filed; and many other important points. Even à very simple in- vention, if new and useful, may prove very valuable. You may have much to gain and nothing to lose by sending for this book Y. CLARENCE A.O'BRIEN € HYMAN BERMAN 317-Z Adams Building WASHINGTON, D.C. REGISTERED PATENT ATTORNEYS BEFORE U.S PATENT. OF FICE Please send me at once your Big Free 48-Page Book, “Patent Guide for the Inventor” and your Specially Prepared "Record of Invention" form. This request does not obligate me, NAME .. PLEASE WRITE OR PI When Answering Advertisements Please Mention May Modern Mechanix 11

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Kordon Ciis pio the Sailing, UDGING from the increased number of letters and photos received by the Workbench, it is apparent that many home craftsmen are entering a period of renewed activity. Perhaps the ap- proach of Spring has something to do with it, inspiring workshop fans to hastily complete projects started during the cold winter months so that they will be ready to enjoy every possible minute on the open road, lakes, woodlands, and seashore. Without a doubt, the boats, midget autos, trailers, and other interesting outdoor projects, of which we have seen photos, are going to pro- vide some mighty enjoyable days for many readers who have been poring over MM plans and working with lathe, power saws, and the lowly hammer and nails. To readers who have completed projects we extend congratulations. To those who have not we again say that it is never too late to start. No matter what season of the year you will find interesting articles and plans in every issue of MM, or in any of the books—"How 'To Build Trailers,” “How To Build 20 Boats,” or "How To Build It,” which can be secured direct from the MM office in Greenwich, Conn., at the popular price of only 50c each. dee E Heading the list of Workbench prize winners this month, Raymond B. Smedberg sent in photos and a letter that were awarded first prize of $5. He writes: Centredale, R. I. Dear Editor: Enclosed are photos of my Olympic monotype V- bottom catboat that I built from MM boat plans during 24 s sailing—and Raymond Smedberg, of Centredale, R. I., does plenty in the Olympic V-bottom boat he built from MM plans. Close-up and sailing views show boats beautiful lines and excellent construction details, my spare time. The sails, too, are made according to MM plans. The boat has proved very satisfactory on salt water as well as fresh water and an old sailor who tried it out stated that it was the best small boat he ever sailed. It is very seaworthy and handles well in light or strong winds. Building your own boat is easy and economical when MM boat plans are used. Thanks to MM for putting out really easy-to-understand plans. Raymond B. Smedberg. The combination of good boat plans and Smedberg's craftsmanship has certainly resulted in a sailboat of beautiful lines and seaworthy charac- teristics as the photos plainly show. ob The height of the trailer season will soon be upon us and W. Thrasher, of Hamilton, Ontario, Canada, has made ready for it by constructing a streamlined trailer. In his letter which ‘was awarded a $3 prize, he says: Dear Editor: I am instructor in carpentry, joinery and building at Hamilton Technical Institute and would like to re- ceive an MM blueprint catalogue, My students are particularly interested in trailers, planes, and boat building. I am sending a photo of a trailer built in spare time. The top folds down at the rear end to give a streamlined effect when traveling. W. Thrasher, The booklet has been mailed to Mr. Thrasher and we know his students will find projects that will provide ample outlet for their energies and craftsmanship, ah A prize of $3 was awarded to Orville W. Odle, of Hartford City, Ind., whose letter states: Featuring a rear top that can be lowered to create a stream- lined appearance when traveling, this roomy trailer was buile by W. Thrasher, a teacher in Hamilton, (Ont.) Canada. Modern Mechanix Dear Editor: Enclosed is a photo of a pedal locomotive made from plans that appeared in MM. It was made in a basement with common tools and has bronze bearings. Heavy enough for a %4-horsepower engine, the loco- motive stands 46 inches high and is 94 inches overall length. The locomotive is very realistic in appearance and you can imagine how my five-year-old son's eyes “popped” when he first saw it. The American Legion asked for permission to take the model to their state convention, Orville W. Odle. Yes, we can very well imagine how many little eyes would "pop" if they were fortunate enough to see a miniature locomotive that can be pedaled along the streets. Good work, Mr. Odle. don Midget racers still appeal to many home work- shop fans and a letter and photos describing a finely built one won a $3 award for J. R. Halley, of Philadelphia, Pa., who says: Dear Editor: Reading your magazine has been great, but when you talk midgets you want to consult Philadelphia. I am sending you a photo of what we consider a real midget. The midget racer is 64 inches long, has brakes, clutch, gearshift, etc., and is powered by an outboard engine. It will attain speeds up to 50 m.p.h. J. R. Halley. The arrangement of the outboard engine to power Halley's midget is novel, and we must con- fess that it really is one of the smallest racers we have ever seen. A real midget racer, as can be judged from the tiny tot oc- cupying the cockpit, is this one built by J. R. Halley, of Philadelphia, Pa. Note arrangement of its outboard power unit. May, 1937 Clio bt onc] Lucky ate the youngsters who have fathers who can build them. a pedal locomotive like this one. Orville W. Odle, of Harte ford City, Ind., built this realistic engine from MM plans. On behalf of the Auckland Model Airplane Club, Winston B. Mackley, of 8 Ascot Lane, Remuera, SE 2, Auckland, N. Z., wishes to invite correspondence with MM readers who are seri- ous model builders. The Auckland Club, as many readers will recall, sent a team over to the U. S. last year to win the coveted Moffett Trophy at the National Contests held in Detroit, Mich. If you are reaily interested in model plane building here is your chance to correspond with members of a club that rates ace high in the hobby. Enclose a stámped addressed return efvelope with your letter to Mackley. due Another $3 prize winning letter was sent in by Robert O. Lewis, of Troy Hills, N. J., who writes: Dear Editor: Y am sending a snapshot of the sail rig for canoes which I made from plans that appeared in MM. The entire cost was less than seven dollars. I used the rig to outsail two other canoes that fea- tured different types of rigs. Contrary to the general belief that a canoe is dangerous with sail, I find it unusually stable, due of course, to the lee-boards that are used when sailing. I cannot give this rig too much praise and heartily recommend it to anyone who has a canoe. There is no end of fun and thrills. Having been an MM fan for years, I keep all the [Continued on page 26]

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JUST Another | BRINGS INVENTOR White experienced years of ups and downs, marked by discouraging rebuffs from big industrialists, by expensive promotional ex- periments, costly infringement fights and destructive price wars in the buckle business. It was in 1915 that the idea for her buckle first came to Mrs. White. After 15 years as a widowed school teacher with four children to raise, she had started, at 50, to learn the corset business. Within three months she had designed an im- provement on a “clumsy” hose supporter, “When I showed With her husband and four children on relief, Mrs. Anna J. Green- wich of Chicago sold a hair curling device which put her on easy street. She paid back relief funds and saved her home besides. by H. H. Slawson NOTHER gadget has rung the bell and brought its inventor a fortune. This time it’s a 70-year-old grandmother, Mrs. Birdora H. White, of Chicago, who draws the big prize. After a 20-year struggle for recognition, Mrs. White has sold for $350,000 the exclusive right to the use of a simple little buckle of her invention on overalls and work garments made by one manufacturer. She still holds other valuable rights in the patent. So simple does the buckle look that judges in the Patent Office àt Washington were almost affronted and scornfully asked, “Why bring that in here?" “Just another buckle,” one of them ex- claimed as he disdainfully fingered the model and recalled how he had a buckle "just like that" on his jeans 50 years ago. ; Attorneys convinced the court otherwise, Dr, Vladimir Zworykin with his ‘bottled television” ise cathode ray tube. The broadcast pictures appear on however, and a patent was granted. Then Mrs. the large end, aad then are projected onto a mirror, 32 . * Modern Mechanix GADGET $350,000.00 this to a friend,” she relates, “she remarked that it would make a wonderful overall buckle. Then I began noticing how men use bent nails, slivers of wood or big knots to help hold up their over- alls. So I started figur- ing on a buckle suitable for such garments. “More than once in the discouraging years that followed I was tempted to forget it. I was spending the best part of my life on a little buckle and not getting anywhere. Ineverseea little gadget now with- out wondering if the in- ventor suffered all the grief I went through." Mrs. White's success is not unusual. The rub- This amazingly simple overall buckle brought in $350,000 to Mrs. Birdora H. White, 70- year-old Chicago grand- mother. But it^ took her twenty persevet- ing years to sell it. ber tip on your pencil, the clip on your pen, the rubber-wrapped button on your garters, the snap fastener on your gloves, the zipper on your jacket, that collar button which turns down in the back, your suspenders, your safety razor have all brought Aladdin-like fortunes to their inventors. Gillette, of razor fame, for one, is said to have made $2,500,000 annually, for years. Chieago alone, where Mrs. White lives, has been peculiarly prolifie in producing out- standing inventors who started in a humble way. One thinks of Pullman and McCor- mick, of Charles E. Scribner, of the Crane brothers, of William Seelig, Lee De Forest and Vincent Bendix. Almost daily that city's honor roll grows. From Colorado came two brothers, O. S. [Continued on page 144] Dr. Willis R. Whitney, who has invented a way to put radio waves to work curing lame muscles and joints caused by hard calcium substance in the body “oil.” May, 1937 33

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Buildin *OLAYING with trains,” is what people used to call it, and playing with trains is what some people still call it until they see a real model railroad system and realize the study and planning, the vast amount of de- tailed mechanical and electrical work, and the craftsmanship that are necessary to build it. For model railroading is no child's play, but a full fledged hobby, worthy of the best spare time efforts of the 25,000 or so Americans engaged in it. Perhaps it's the very challenge to their abilities that makes this pastime so popular. A model railroad is never finished, and the better the builder's work becomes the further his ambitions surge ahead of his ac- 36 William Pinter, of Gar- wood, N. J, (circle), proudly exhibits his Tiny Tom 00-gauge locomotive and tender built from MM plans. The popular model is patterned after a Southern Pacific Railroad engine. No Child’s Play Is This Fascinating Hobby, But a Challenge of Ability. by A. C. Kalmbach complishments. Machinists, electricians, and engineers are not the only ones who tackle the problem of reproducing to exact scale rail- road equipment and railroad operations. By far the largest part of these 25,000 model rail- roaders are bankers, lawyers, executives, office men, and clerks who never met a hand drill face to face before. To them soldering was a mystery, scaling plans something to be left to the draftsman and architect, and the Modern Mechanix A general scene (above) on one of the O-gauge systems built by Minton Cronkite, of San Marino, Calif., who has the largest individually owned model railroad in the U. S. So realistic is the system that the Sante Fe Railway borrowed it for display. purposes at the Texas Centennial Exposi- tion. Right—Like a view from a signal tower is this stretch of “pike” as seen from overhead. railroad merely a way of getting somewhere quickly, Model railroading was popular in England even before the war, and while a few Ameri- cans had built scale models of one kind or another before that time, it was not until 1927 that the idea of building really comprehensive miniature systems to exact scale was at all practiced in this country. The beginning was in the east, around New York City, and the earliest builders modeled mostly Pennsyl- vania equipment (until you are a model rail- roader you never fully realize the individual- ities of the various large railroads), and to this day Pennsylvania equipment is most used as a prototype. : At first this scale railroading was largely a rich man’s hobby. It took either lots of time, or lots of money to buy someone else’s May, 1937 37

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time. Most of us were too busy making money in 1927-1929 to spend it ón hobbies. Then came the depression and a vast increase in leisure time. The fascination of the railroad combined with the allure of the home work- shop. One model railroad in a neighborhood started others and the hobby grew like guinea pigs. Since 1934 the growth has been rapid. The cost limits of a model railroad system are practically indeterminate. A system can be built for a dollar a month. It takes careful planning and lots of work. Systems have been built costing up to $50,000—and there's still plenty of work left on the $50,000 system to add interest and keep the owner busy in his spare time. The total spent in the U. S. on model railroad parts and on completed models is somewhat more than $300,000 a year. Some of the men early in the hobby, cast- ing about for fresh business opportunities during the depression, started companies which supply plans, castings, machined parts, and now can sell you freight and passenger cars, locomotives, and track in any form, from rough materials to completely finished units that need only installation. The hobby kit is most popular. In this kit the various parts of a locomotive or car are partly finished, so that work left to be done consists only of drilling, tapping, and soldering. The assembly can be accomplished on the kitchen table. Two box cars built by John Borges, of Boston, Mass., are shown below. Perfect replicas of freight cars, they are for HO-gauge, the smallest size used. A large freight engine LM. modeled in 0-gauge by i foe William Lenoir, of West 1 1 Chicago, Ill, is shown at the left. Notice the com- plete piping detail. The head- light has transparent number plates on each side of the casing. —Circle—A realistic railroad scene is presented by these models as they pass each other on a curve. Finished models cost from $45 up for loco- motives, from $5 up for cars. The materials for track cost from six cents a foot up. Per- sons able to afford it often buy much of their material finished and yet lose little if any of the fun, for there is still plenty to do, plan- ning right-of-way, building scenery, arrang- ing schedules of service, signalling, etc. A model railroad is never finished. It’s a lifetime hobby. The man with little money for non-essentials buys as little outside as he can. Rail, spikes, and rail connectors are his track materials. He makes his own ties. Castings for a few parts, wheels, couplers, gears, and motors are about his only pur- chased materials for rolling stock. Very often he turns out finer work than the best pro- fessionals, just because he can afford to put Live steam for model locomotives has its fascination although most miniature systems are electrically powered. The train shown in the photo at right is owned by A. R. Horner, Ahwahnee, Calif. Puffing, it valiantly tackles a steep grade. plenty of time into his work, and because he takes pride in his craftsmanship. It’s the construc- tion angle that intrigues him. Roughly 90 per cent of the model railroaders are in the kit class, buying their equipment in the shape of finished or semi-finished parts. The remainder are about equally divided between those who «` buy finished models and those who build from the ground up, buying nothing but the raw materials. These last are the real craftsmen of the hobby. For them one train is an accomplishment, a product of years of labor. Two hundred hours on a locomotive is not unusual Because of this, they seldom have as complete systems as the men who buy at least some of the parts. Imagination is important, perhaps para- mount, in model railroading. Suppose you want to start a model railroad. You survey the attic, basement, or perhaps back yard with — C. F. Robbins, of Keene, N. H., demonstrates pulling " power of his scale model Timkin locomotive. It burns coal. Upper photo—A finely detailed 0-gauge model of the famous English "Red Hussar" locomotive. an eye to the possibilities for a railroad route that will move traffic from one place to an- other, or at least have that appearance. You select a name for your “pike,” elect yourself president, chief engineer, and man of all work. You write for catalogs of perhaps a dozen supply houses to get an idea of what each can offer both as to prices, railroad prototype, and quality. You read the model magazines (there are three, one of which is devoted exclusively to model railroading) and see what others are doing so that you [Continued on page 141] ma

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M The new Justice Building (above) in Ottawa, Canada, housing the Department of Justice, is also headquarters of the Royal Canadian Mounted Police. From here orders are issued that activate Mounties in solitary outposts in the furthermost reaches of the Canadian woodlands. Major Gen. Sir James MacBrien, com- missioner of Royal Canadian Mounted Police (left) introduced airplanes into the service when he became chief over six years ago. «« A RE you able to drive an automobile? Can you use a type- writer? Are you qualified in shorthand?" Hollywood won't like it known, but those three questions are from the latest recruit examination papers of the Royal Canadian Mounted Police. The days of Reading, "Riting and Riding, the three R’s of the old “Northwest Mounted" are past forever. Hum of R.C.M.P. motors and chatter of R.C.M.P. keys drown out the last clatter of hooves. Not stable fatigues but classes in practical mechanies blight young policemen's hopes of high adventure. The Mounties have gone modern. Plain figures plainly set down best show what has happened to the riders of the plains and their traditional means of loco- motion since the days when a horse for every man and a few Modern Mechanix "Get Your Man The Quickest Way," Now Canadian Police Creed. The modernized R. C. M. P. has 19 speedy power boats, of the type shown above, to combat smugglers. Right—Sketch show- ing the Mountie as popularly portrayed in fiction. Today, only 300 of 3,000 men are horse-mounted, although all must know how to ride. spare mounts for luck was the rule of the service. Today, there are in the Royal Canadian Mounted Police 2,500 men, 387 sleigh dogs and 300 horses. The list of R.C.M.P. mechanical transport includes 442 cars, 28 motorcycles, 19 trucks, 19 power boats and one Arctic supply ship. In addition the force uses, in its preventive service on the coasts, a small fleet of Royal Canadian Air Force seaplanes. Mileages for the last year of record mark even more clearly the eclipse of the horse in the Royal Canadian Mounted Police. The distance traveled on duty in the year was May, 1937 ae HANIZING The Mounties 13,506,632 miles; an average of 5,402 duty miles for every member of the force. Nearly seven million miles of the total was covered by motor, just over six million by railway and steamboat, more than 300,000 miles by coast, lake and river patrol boats, close to 200,000 miles by airplane, 50,000 miles by dog team and not enough miles on horseback to be worth recording. The force has come a long day’s ride since the spring morning in 1874 when 300 redcoated, white-helmeted young horsemen started west from old Fort Garry to carry out the words of the newly created “Mounted.” The 300 had enough to do in their day. They had to deal with liquor smugglers, cattle rustlers and horse thieves along 800 miles of boundary, to convince 20,000 short-

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Air patrols, made in seaplanes of the Royal Canadian Air Force (above), are part of the routine duties of the mechanized R. C. M. P. Mounties travel about 200,000 air miles yearly. (Royal Canadian Air Force Photo.) tempered redmen that the new rails going down across the prairie were better not torn up, to mete justice, fight prairie fires, and generally to guard life, property and the Queen's peace over 2,300,000 square miles of Canada's Northwest Territory. That task was well done. That day is over. Today, the boundaries the E.C.M.P. patrol run west from Atlantic to Pacific and north- ward from Campobello Island and Cape Flat- tery to far beyond the Arctic Circle; the law- breakers they hunt are more likely to be members of international dope rings than simple horse thieves, and their tasks have multiplied with the years. Reporting on the vagaries of the Aurora Borealis, card- indexing fingerprints in an Ottawa office, tracking an Eskimo killer across 300 miles of ice floe, trailing a smuggler to Spain and back, enforcing Dominion wild life laws, rescuing a flight-weary wild goose from small boys, these are all in the mixed bag of a present- day Mounted policeman’s duties. In few of the thousand jobs that may come out of the bag is his old friend, the horse, much use to the Canadian Mountie. Sir James MacBrien, flying commissioner of the Royal Canadian Mounted Police, who, in 30 days made an 11,000-mile inspection of posts, a trip that once required three years of tedious travel by ordinary surface means of 44 Motor cars are used by the Mounties ‘in ever increasing numbers. Nearly seven million miles are covered annually by auto patrols using 442 cars owned by the organization. Photo shows, left to right, Constables Greene, Cooper and Ross of the Regina Town Station. transportation, tried, not long ago, to comfort alarmed romantics among his countrymen. The horse, he said, was still assured of a place in the Mounted Police. There was “no in- tention whatever of dispensing altogether with the mounted men.” The intention was only to segregate horses and horsemen in a mounted section to be used for ceremonial parades and in “dealing with unruly crowds.” A “mounted section” in the Mounted Police— Sic transit gloria equi. But when lawlessness takes to 12-cylinder engines and short wave radio, the law needs more than hooves and horseflesh to keep up with it. The force itself sees small cause to lament the mechanization of the Mounties. Getting your man being the essential thing, the quick- est way of getting there to get him is the best in R.C.M.P. opinion. That's why the Mounties rode horses in the 'seventies. That's why they ride in motors, power boats and airplanes today, when they aren't driving dogteams across the ice hummocks of the last frontier. The Mounties have been going modern from Modern Mechanix The figure of the trooper and his horse (right) is fast reaching the point where it can only be seen blazoned on the covers of magazines and in motion pictures. Not enough miles are covered on horseback by modern Mounties to make the matter worth mention in official reports. Plane, car, and speed boat crowd the scene. their beginning, and always from within. Mounted police records of sixty years sup- port the claim. There was, for example, a dangerous innovator named Jarvis. He was superintendent of a prairie division and, as far back as 1886, he was writing headquarters [Continued on page 129] May, 1937 The broad brimmed field hats, recog- nized as the trademark of the Mounties. were adopted in 1896. Before that time, the men wore “pill box" hats of a type shown in photo at left. Above — Motorcycles have extended the modern Mounties patrol range.

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* Y BABY was born deaf and dumb,” a mother said to me recently, indicating a bright, attractive looking little boy about four years old. “Oh, no, he wasn’t!” I assured her promptly. “He may have been born deaf, but he. wasn’t born dumb any more than any other baby is. He hasn't learned to talk because he hasn't heard other people talking—just as you haven't learned to talk Russian because you haven't heard people speaking that language. His vocal organs are all right, and his mind is all right, and he can be taught." Only a few score years ago nobody would have told the mother of a deaf child anything like that. He would have been obliged to grow up not only speechless, but far worse. Because nobody could communicate with him, 50 he would have been considered idiotic. He would not even have learned to read and write. He would not have been allowed to inherit property; he could not have trans- acted even the simplest business. If his mother had taken him to a doctor, horrible things might have been done to him, for it was thought that his inability to speak was a thing apart from his deafness. His tongue might have been slashed or scraped, or his throat injured, in a misguided effort to give him the use of his vocal organs. In the 16th and 17th centuries, a few teach- ers discovered the possibility of educating the deaf, and taught certain isolated cases; and toward the middle of the 18th century groups of deaf children began to have a better chance in life. A French priest, named de l'Epee, Modern Mechanix to five normal npaired, if the ear can carry sound ne structure fo the still d Edent of the Volta Bureau, is pictured at the right) and a teacher in Germany, named Samuel Heinicke, established small schools. Heinicke taught his pupils speech and lip reading, the method used by the earlier teachers. De l’Epee tried to do the same, but his school was free, and so many chil- dren were brought to him that he was forced to devise a more rapid means of communication. He invented a system of signs to express ideas, and supplemented these by the use of a finger alphabet which had long been in use among monks who had takeri vows of silence. His sign language, greatly amplified and im- proved by his successor, was the fore- runner of that which is beloved today by many adult deaf persons in all parts of the world. Its use in schools is frequently May, 1937 Advances in lip reading, perfec- tion of electrical devices lessen hard of hearing terrors.

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ME? George Cook, a Buffalo, N. Y., instructor in lip reading, illustrates how lips indicate the sounds of various words. Buffalo is one of the centers of lip reading education with a League for the Hard of Hearing often conducting contests in the art which is available there both in public and private schools. Buffalo Times Photo 52 discouraged, because it is a handicap in learning English (or French, or German, or whatever the native language is), but it is an easier means of communication than speech and lip reading, and consequently many of the deaf prefer to use it among themselves. It took a long time for the work begun by these pioneers to spread to other parts of the. world, but a permanent school in the United States was established in 1817. It was called "The American Asylum for the Deaf and Dumb," the idea being that the one institution would be adequate to care for all of the deaf in the country. The name of its founder, Thomas Hopkins Gallaudet, appears in mosaics on the walls of the Library of Congress among other pioneers in American education, and the only college for the deaf in the world, Gallaudet College, Washington, D. C., does him honor. It took his school nearly a hundred years to get rid of the objectionable words “aslyum” and “dumb,” and the former still clings to the original site, Asylum Avenue, Hartford, Conn. We have had a little more than one hundred years in which to attain our present stage of development. The realization that more schools would be needed, soon became apparent, and others were established in rapid succession. At first, the children were all taught by means of the sign language and finger spelling. Those who had had speech before the loss of hearing sometimes retained it in part, but they received no training in its use, and it was thought quite impossible for those born deaf to learn to speak at all. This state of affairs continued until after the War Between the States, when some very prominent individuals began to play parts in changing the picture. One was Mrs. Henry Lippitt, wife of the Governor of Rhode Island; another was Mrs. Gardiner Greene Hubbard, whose husband founded the National Geo- graphic Society. Both of these ladies had little girls who were totally deafened by searlet fever at the age of four or five. Both made up their minds that their children should not be deprived of the speech that was their rightful heritage. All prophecies to the contrary notwithstanding, they succeeded in retaining the speech of their little daughters, and in teaching them to understand others by lip reading, which is watching the movements of the face in speech. An obscure, indomitable little teacher, Harriet Rogers, also was thrust into a conspicuous place when the pupils she had taught speech and lip reading were called to demonstrate her success to the Massa- chusetts Legislature, so that a charter might be granted for the establishment of a school to teach the deaf speech instead of signs. Speech teaching received its real impetus Though his hearing is impaired, Frank Becket, investment banker. is an accomplished pianist and composer, He is shown at work on one of his own compositions, listening to it elec- trically through the bones of his head. On the piano stands a microphone con: nected to the tiny electrical receiver worn just behind the ear, | Special equipment for the hard of hearing as installed in ‘the Church of the Covenant, Boston, Mass., is shown at the right. Similar devices are being placed in talking picture theaters.

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Pioneers in the field of instruction for the deaf were Samuel Heinicke, German teacher, above, and Abbe de l'Epee, French priest shown in circle. Heinicke first taught lip reading. De l'Epee invented a system of signs with which the deaf could express ideas. His system was the forerunner of the one used by many adult deaf today. with the advent of Alexander Graham Bell. Cultured, dignified, enthusiastic, picturesque, the son and grandson of experts in speech- teaching, he acquired early in life an interest in the deaf that amounted to a passion for improving their condition. As long as he lived he replied, when asked his occupation, “I am a teacher of the deaf.” His celebrity as the inventor of the telephone and his posses- sion of financial means helped him to arouse much interest in the cause he upheld, and his friendliness and dynamic leadership enabled him to set in motion forces which were to result in great changes for all those handi- capped by absent or deficient hearing. His chief interest was in having the deaf taught speech. He taught them himself, with remarkable success. He gave courses in speech-teaching to their teachers. He lectured and demonstrated in their behalf. Finally, finding himself unable to cope with the immense flood of letters that brought him inquiries of every nature dealing with deaf- ness, he founded and modestly endowed the Volta Bureau “for the increase and diffusion of knowledge relating to the deaf.” Later he gave the bureau to an organization which he had founded subsequently, The American Association to Promote the Teaching of Speech to the Deaf. Its service as an infor- mation center has become not only nation- wide but world-wide, and it is still housed in the building he erected for it in Washing- 54 Before modern times, the lot of a deaf person was likely to be tragic. Deaf children grew up speech- less and often were sub- jected to barbaric medi- cal treatment. This en- graving by Lucas van Leyden from theBettman collection shows an op- eration behind the ear as performed in the year 1524. ton, D. C. Its reference library on deafness is probably the most complete in the world, and its magazine, the Volta Review, is the only one in American that deals not only with the education of those deaf from childhood but also with the everyday problems of those who lose their hearing in adult life. Two other very well known names are connected with the Volta Bureau's history. Sinclair Lewis was employed there at one Modern Mechanix time, as assistant editor of the Volta Review; and Mrs. Calvin Coolidge was a member of the Boazd of Directors while her husband was vice president of the United States. Mrs. Coolidge, by the way, is stil actively interested in the education of the deaf, being president of the Board of Corporators of the School where she once served as teacher—the School for which Harriet B. Rogers fought in her demonstrations before the Massachusetts Legislature—Clarke School, Northampton, Mass. Deafness still brings heartbreak and handi- cap wherever it attacks, but it is far from being the affliction it was a century ago. A short time ago I paid a series of visits to schools for the deaf. This is what I saw in one of them. A class of children about ten or eleven years old, gathered around a table on which were placed the outlets for a group hearing aid. The children had come to school five or six years previously, in just the same condition as the pupils who came to the abbe de l'Epee. Not one of them had had any speech. At first they had been taught speech through the senses of sight and touch, and had learned to read the lips of their teachers and fellow students. Hearing tests had [Continued on page 154] James Hutton, an 18th century physician, is pic- tured with his ear trumpet. Miss Sophia Alcorn is pic- tured at the right giving lip reading instruction to a class at the Detroit Day School for the Deaf. Most large cities+ have similar instruction, May, 1937 Alexander Graham Bell, inventor of the telephone, was a teacher of the deaf. Interested all of his life in teaching them speech, he founded the Volta Bureau, shown below, in Washington, D. C., and also organ- ized the American As- sociation to Promote the Teaching of Speech to the Deaf. The Volta Bureau takes its name from Count Alessandro Volta, the Italian physicist,

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ER ACCESSORIES Success of a fishing trip de- pends as much on accessories as the scene and the fish. Care in planning brings rewards. Hook and sinker kits keep the fisherman’s weapons in order. At right is a leather rod case. 62 SPORTSMEN'S ‘by Robert Page Lincoln RITERS on fishing invariably de- vote themselves in their essays to voluminous accounts regarding tackle habits of the trout, and this, that or the other. When, however, it comes to writing with regard to the clothing and like necessities to use, they pass the subject by merely as an afterthought. Obviously the success of any trip depends upon the physical well being, proper bodily protection and an ability to master the elements. Instead of being shoved to the back of a book it should occupy first place. That there are colds and all manner of ailments contracted annually on trout fish- ing and other trips is rather proof that less consideration is given clothing and like par- ticulars than any connected with the pastime. How much better it is to go well equipped to take care of your health and at the same time be able to wade successfully any portion of a river or stream that is reasonably nego- tiable. Unlike in other departments of the pisca- torial game, trout fishing calls for the use of either hip boots or so-called wading trousers, the same being picked according to the stream that you are to fish. Gener- ally most streams are only compara- tively deep and may be waded using hip boots. Others are a different proposi- Waterproof clothing some- times means the difference between a thrill and a chill for the spring fisherman. CAMPFIRE FOR TROU tion altogether, presenting fairly deep water that would go over the tops of hip boots. In such streams the wading trousers that come up to under the waist are most desirable, in fact are almost a necessity if one is to get the most out of a wading stream. The fisherman who has come upon a stream of the sort using hip boots only to find that time and again it has been impos- sible to wade across to a certain point; to reach a mid-stream location, or otherwise has found himself halted by reason of boots that would or could not "take" it, knows eventualy just how invaluable wading trousers are in a case of the sort. This is not to say that even wading trousers are equal to each and every situation, but it is certain that two-thirds of the streams that cannot be fished when using hip boots will be successfully circumvented by the use of wading trousers. Wading trousers come in two types, the heavier one with the built-in shoe and the so-called feather-weight or light-weight waders (trousers) which have no built-in shoe on which are worn leather wading shoes or brogues that slip on over the so-called “stockinged” feet of the waders. While there are good points scored for each type of these wading trousers, it can surely be said that the light-weight trousers are the best, where lightness, ease of wearing and transportation are concerned. These light-weight trousers, in the wading class, can be rolled up and tucked away in a packsack to take up but little room. The heavier type, with built-in shoes, are not so easily carried, and are by far more clumsy. On the other hand the heavier trousers with built-in shoes) are more sub- stantial and wee longer. Two Sheepskin hatbands like the one at the left ate a helpful accessory for the fly fisherman. The fly lures are hooked into the band for instant selection. years is just about the life of a light-weight wading trousers, that is, if used a great deal. Brogues or shoes used for wading are gen- erally fitted out with heavy soles. If not to be had as the shoes come, a shoemaker can apply these with ease, making them upwards of an inch thick. The bottom of these are set with hobnails, so arranged that they will best grip the rocks on the bottom of the stream. Hobnails, while useful, are not entirely successful in that they will wear 63

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NON- SLIP BOOTS The drawing shows special construction for boot soles to prevent slipping on dan- gerous rocky stream beds. Light weight ankle boots which terminate be- low the knee and allow much freedom are popular with many fishermen who like to wade trout streams. down, Even better than the hobnails are three-quarter-inch long wood screws, with sharp edges that are turned in to stand out a quarter of an inch and so arranged over the area of the sole.as to make for a good grip on the rocks. These screws should not be so close together that they do not form contact with the slimy cobbles, otherwise the purpose of the idea is quite lost. The sharp edges of the screws cut into the slippery rocks and hold, where the rounded hobnails are likely to slip. If these screws are set in old or worn leather they are likely to be but poorly held in place and are apt to tip over under rough impact. They should be set in new leather soles, which same, being tough and hard, will hold them secure in their up and down posi- tion and will not turn when pressure is made against the rocks. Where wading shoes or brogues are used outside of wading stockings or the feather- weight trousers mentioned, there is need of protection for the wading stocking that covers the foot. Therefore, it is necessary to pull on two pairs of wool socks over the stocking after which it is inserted in the wading shoe. This forms a protection be- tween the stocking and the shoe that will prevent wear. Inside of the stocking another two pairs of socks are used, thus involving the use of four pairs of socks. While this will seem a lot of socks, it should be remembered the trout water, whether in the summer or spring is likely to be ice-cold. With the suffi- cient number of socks stated one will find himself comfortable at all times, and will stand not the slightest chance of incurring a cold. It should be remembered that a clammy foot in a pair of hip-boots will be likely to 64 Here is a, well. equipped fisherman in action. Note creel harness and boots. Creels with shoulder harness like the one shown at left permit complete arm freedom while casting line. invite a cold as well as walking barefooted inthe water, This is something that is rarely given any attention. Since many colds come from the feet, the protection that must neces- sarily be accorded them should be as com- plete as possible. Wading trousers (or wading stockings as they are also called), have need of strong suspenders to hold them up. They are but fairly tight to the body. Some years ago there was considerable propaganda put out against these wading trousers, the statement being made that they were dangerous. If the fisherman got out into mid-stream and was swept off of his feet, or got into a deep hole, these trousers would fill up with water, and would then pull the fisherman down, re- sulting in death by drowning. So few, if any, have these drownings been that they are to Modern Mechanix be dismissed without second thought. The “chances of drowning in a pair of wading trousers on 90 per cent of our American trout streams is extremely narrow. Undoubtedly, in fishing a real swift stream, in which one has difficulty in standing on one’s feet, there would be some risk, but the same risk would be incurred fishing with hip boots or even when fishing in the “soaking wet" style, where no boots are used, just the hobbed shoes. The fact remains that the wading trousers are well nigh invaluable, and assures one the opportunity of fishing places in streams that otherwise cannot be got at. While these waders cost considerably more than the hip boots they are well worth the added difference. Hip boots accompany about 75 per cent of Lots of pockets in this special waterproof fish- erman’s wading coat provide room for tackle. the trout fishermen on their annual trips, re- gardless whether they permit one the oppor- tunity of covering all stretches of water or not. The oldtime boot used in trout fishing was little short of a trial when worn. Many of these were in the heavy, ditching boot type. They were hard to wear and invariably wore blisters on the heels, toes and sides of the feet, which were caused by the boot foot being too stiff to bend with the foot. In other words the foot would bend but the boot would not, thus forming a wear of the boot against the foot. Present-day hip boots are now made in a light-weight material, so soft and merging with the movements of the foot as to surprise one. ‘Such boots are extremely easy on the foot, and, worn with a pair of wool socks, possess everything that is needed in wading efficiency. They are so light and are made of such featherweight material that they may be rolled up in a small bundle to take up but little space. New in- novations in these rubber boots of the hip May, 1937 This Yale hat and similar types protect the head of the fisherman from the weather and are also pop- ular for any other kind of outdoor activity. This lightweight waterproof vest is designed to protect the sportsman without impeding his movements. The sportsman t the right is wearing a burr-proof and mosquito-proof buff horsehide garment and carrying one of many folding kits on the market that serve well to carry lures, hooks, Tine, etc. variety involve buckles that connect over the instep of the foot, this holding the boot in place on the foot. If pulling the boot out of the mud, it will come up without being left in the same. Fishermen who have had mis- fortunes of the sort will appreciate the value of this inventive item. Newer type rubber boots have various non- slip features, the chief invention in this line being a rubber boot with a sole to which you may affix hobnails. 'This is no less than a stroke of invention wrapped up in one pack- age. Corrugated and cleated soles are in- teresting additions to boots, also ankle-fit features that make such boots more com- fortable on the foot. Other recent additions to the line of boots that are useful not only for the trout fisherman but all fishermen as well, are the so-called ankle boots that reach up some 16 inches or so on the leg. These have no tops like in the hip boots. They ter- minate below the knees. They are light in weight and incorporate all the features de- manded in a short boot. They are used in fishing along brushed-in streams, through [Continued on page 116] 65

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"FS" of the GREAT Xr Ses S lal ufa E EU E coc d Y BOE SEE EET PRÉ! onmmimmmm * [s nec ee ev VITIS ERIT vnm m yp ELLIS resets sepeeeeuens Greatest ship of her day, the Titanic sailed westward 25 years ago this spring into circumstances rivaling Greek tragedy in catastrophic portent. A vessel of 46,328 tons and 882 feet in length she would be one of the biggest ships even today. There were accommodations aboard for 2,650 passengers and a crew of 892. by Karl Baarslag Author of “SOS to the Rescue" LTHOUGH 25 years have passed, bring- ing with them many other sea disasters, the foundering of the White Star liner Titanic remains to this day the worst marine catastrophe of all time, measured in lives lost. On a spring night, April 15, 1912, 1,517 men, women and children perished in the icy waters over the Grand Banks of the North Atlantic. The materialloss was more than $12,000,000. The world's newest, largest and most lux- urious “unsinkable” ship went down on her maiden passage in two hours and forty minutes. Lost with her, on board and over- board, were a long list of prominent figures in the arts, in public life and in the business world. Her commander, E. J. Smith, Com- modore of the line, went down with his ship, as did 77 per cent of her crew. The world was stunned following the news. Business virtually ceased on the New York Stock Exchange. Consternation ruled at Lloyd's, who had insured the vessel at one of 68 the lowest rates ever given because of her supposed "unsinkability." ^ Buildings in London, New York, and elsewhere half- staffed their flags. The sinking aroused sen- sational rumors, wild charges, and acrimonious controversy. It was made the subject of two inquiries, first by the United States Senate, the other by the British Board of Trade, under presidency of Lord Mersey. The poignancy of the Titanic disaster lies in the extraordinary tragic concatenation of circumstances, which, taken separately, would not have resulted in disaster but which, linked together in relentless succession, made the catastrophe inevitable. In no Greek tragedy can one find such an inexorable and fatal chain of calamitous circumstances. Here was no General Slocum fire and a panic, of helpless women and children; no sudden sink- ing of a torpedoed Lusitania or badly holed Empress of Ireland; no helpless and leaking Vestris foundering after a severe storm. Just the glancing scratch of an iceberg—and a small berg at that!—on a starlit, calm, clear night. After the two inquiries, the full tragic chain of "ifs" and “might-have-beens” stood re- Modern Mechanix "TITANIC" TRAGEDY À | i vealed in terrible clearness. If the look- out men had sighted the berg a few seconds earlier the collision would have been averted entirely. Had the berg been sighted a few seconds later, the crash would have occurred more nearly head-on with probably a small loss of life, but with no danger of sinking. The ill-fated liner turned from her course just exactly far enough to receive a glancing, 300-foot long slash, on her starboard side immediately below the waterline. If the Titanic had been built with an inner skin such as the Mauretania or other ships had, or, as is the usual prac- tice, with wing bunkers along the side, the wound might have not been fatal. Even with no inner skin and with boiler rooms right across the ship, she could have floated if her bulkhead deck had been watertight, or, as Lord Mersey concluded, “If the transverse bulkhead abaft of No. 4 boiler room had been carried up to D deck, the ship would have remained afloat.” Subsequent dis- closures proved that this was the Titanic's Achilles heel. All the other May, 1937 From 25 years of study, a radio operator analyzes chain of events which swept an "unsinkable" ship to coom amid ice of North Atlantic. watertight bulkheads were carried up one deck higher but for some inexplicable reason this bulkhead stopped at E deck. But, even with the forward bulkheads carrying a very low margin of safety, that is, up to E deck or only 11 feet above the water line in smooth water, she still sank slowly enough to permit all her passengers and crew to leave in ample time—if, and this is an incredibly tragic "if"— if there had been enough boats and rafts for those she carried. Certified to carry 3,547 persons, she had boats for only 1,178, and even this meagre figure was nearly double that required by the antiquated Board of Trade law of 1894, which had not been revised in 18 years. Therein lay the ironic tragedy of the Titanic. Perfect weather and ample time for launching boats, such as few sinking ships have ever been John George Phillips, chief radio operator of the Titanic, went down with his ship and the principal credit for the saving of the 712 persons rescued. There are monuments to him in both England and the United States. 69

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Fis.I- Profile & Half-Breadth Lines NOTE - ALL HEIGHTS ARE MEASURED ABOVE BASE LINE, HALF WONS FROM CENTER LINE. UNES GIVEN ARE TO OUTSIDE OF FLANKING Qe Nk. ah ia! TL T SCALE N FEET-NOTE-1N CASE OF MINOR VARIATIONS AQDITIONAL DIMENSIONS FOR STEM AND STEM RABBET GIVEN ELSEWHERE BETWEEN SCALE AND DIMENSIONES GIVEN. THE LATTER {OIMENSIONS) SHOULD ALWAYS BE ACCEPTED AS TRUE CHINE LINE KEEL RABBET. 1 ti i | BOTTOM OF REEL QE ni zF i 1 7 pase jing E T E RUDDER DIMENSIONS a) „3 5 as * wem ir sa aet el ang aud 4.6 i awe - 27-47 1 MAIN SHEER. ^1 ANN | BOTTOM PLANNING LAID 45 OEGREES TO KEEL — BEAR: 6° WOE im ded KEEL SUNG rrr `N ^ CENTER LINE— Here are given the profile and half-breadth lines for Flying Á j Cloud. Make certain that you follow dimensions given. Designed Especially For Modern Mechanix by Sam Rabl Naval Architect PARTI ARDLY were the plans for Buddy off the press than MopERN MECHANIX boat fans everywhere began to demand a larger boat along the same general lines. The simple construction of this craft placed her within financial reach of every ambitious youngster who could wield a saw and push a plane. Many of the original craft were built with exceptionally fine results; one of them hav- ing crossed the Gulf of Mexico. Men who earn their living today must be back at the office or shop Monday morning and, of course, require a boat that will not require hours to dock. Nevertheless, the craft must be large enough to provide comfortable accommodations for the average family and not cost too much to build. With all of these essential points in mind plans were drawn up 80 for this "ideal" boat and eventually the boat itself was constructed and christened "Flying Cloud" after that famous old American vessel. Somehow we feel that the spirit of old Donald McKay, designer of the original sailer, will look down kindly upon our miniature version. Flying Cloud may be built as cheaply as possible or it may be constructed of expensive materials. The power plant is either a con- verted auto motor or any inexpensive marine engine. The latter is preferred due to its efficient cooling system which does away with the problem of heat in the cabin. Toilet facilities have been provided and all other necessities of extended cruising have been incorporated into her make-up. The builder ean either adopt the cabin plan which we have designed for Flying Cloud or fit one of his own to the existing interior You may fit the sailing rig or leave it off depending on your own whims. As an out and out motor boat she still has pleasing lines and the draft may be made less thari shown by taking three inches off the depth of the keel. While it will not be within the scope of this article to go into the detail of laying down the lines and fitting each and every piece of material in the structure we will refer the reader to our How To Build Twenty Boats for this information. Materials used in Flying Cloud construction may be any locally obtained wood suitable for boat building. Buddys were built from Modern Mechanix Body Plan € as many different materials as are found around the world from New York to Singa- pore and all are a success, Good solid and well made joints contribute more to the success of any boat than the excellence of the ma- terial. After the backbone is laid down on a large sheet of building paper the shape of the various parts are transferred to the wood either with a tracing wheel or by driving small brads through the outline, with- draw the paper, leaving the brads standing in the wood. The thickness of the stem and keel timbers are such that the ordinary small Sbown here are the arrangement plans for che ship’s interior fittings as well ae a profile view of the interior, SELF STARTING MARINE MOTOR WITH AUXILIARY SIDE HAND OR FOOT CRANK BRIDGE DECK COCKPIT FLOOR DISH RACK j REVERSE CONTROI v. COMPANION WAY, BITT MOTOR BUFFET. VENTILATED HATCH OVER STEERING GEAR TOILET DOM TRAVELLER È CANVAS COVEREI May, 1937 workshop bandsaw will handle them but the easier method is to take the timbers to a mill that has a large bandsaw and let them do the job. After the timbers are cut and ready to assemble they should be temporarily held to- gether with clamps and a saw run between each joint until the surface is wood to wood. This process is repeated for each joint of the backbone and after all joints are thus fitted they should be smeared with "Staytite" or other similar cement, or a good roofing cement to exclude water and most of all the destruc- tive toredo found along the seacoast. The joints are made with drift bolts of %-inch galvanized iron headed up over clinch rings or Ealvanized iron washers. Holes for the drift bolts are drilled a sixteenth smaller than the bolt and the bolt slightly pointed to enter the hole. This pointing is done cold so as not to harm the galvanizing any more than possible, though bolts with nuts and washers may be used if the builder so prefers. After the backbone is assembled the apron of 2"x6" material is securely fastened to the top of the keel using cement as before to seal the joint. This member is left square until the planking is fitted. The backbone is now set up in its proper position on the ground or shop floor being sure to have the proper slope on the bottom of the keel and the stem perfectly plumb athwartship. GALLEY PUMP BASELINE | CABIN FLOOR t5 BEST COVERED WITH LINOLEUM LOCKER FIG.2- INBOARD PROFILE & ARRANGEMENT. REAN 3 * 5 s Bl

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FiG.3- FRAMING PROFILE AND DETAILS OF THE MAIN FRAMES AND TRANSOM — SHADED PORTIONS SHOW KEEL TIMBERS — o I 2 3 4 5

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NOTE/ UPPER FRAMES (13) ARE PUT IN AFTER LOWER FRAMEWORK HAS BEEN ERECTED. SEE DETAILS OF THE MAIN FRAMES BELOW Fey ee SO aa ee COCKPIT FLOOR SANSE g , BRIDGE DECK - 7/8" X 3" T.&G. STAVING- LAIDON 1-1/8" X 3" CROWN BEAMS, MAST PARDNER

*2 H— — MAIN SHEER- 53"

FLOOR TIMBERS (O) 55 1" 7315 12"x 5p L.L.PINE 2 a BOTTOM FRAMES, ex 4g STRINGERS L.L. PINE Lax 295

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1%" x 8" OAK OAK PLANKS V/2"DIAM.DRIFTS

AULOW . V2" FOR E BEVEL j$

_ALLOW FOR BEVEL — TRANSOM — The main frames are now gotten out along with the transom as shown on the plans, de- ducting the plank thickness, and all joints assembled with !4" galvanized carriage bolts, the joints should be well painted with white lead. The notches are cut for the keel, stringers, chines and clamps as shown. The notches for the stringers being half way between the keel and chine or in thirds if two stringers are fitted. The stern knee is set on the keel apron and the transom attached to it. This should be perfectly plumbed and 82

This framing profile shows the important details of the main construction. The main frames are shown completely dimensioned to facilitate laying these members out. Deduct thickness of the planking in making the layout of frames. either fastened to the shop rafters to keep it so, or braced to the ground with good heavy shores to keep it from moving. The frames are then fastened to the keel, being sure to keep them at perfect right angles to the keel and set perfectly vertical. After all frames are set up they are checked for plumb and squareness and then securely braced to the shop rafters or the ground so that they will not go out of line while the boat is being con- structed. If the structure is erected out in the weather it will be well to give it a coat of good Modern Mechanix

M BASE BLOCK

CUT OUT RAISED SHEER DECK —7/8"X3" T. AG. 13 BREAST CLAMP THUS FORPORTS VEE EDGE STAVING xng FOR BITT m E DECKING / ee a X MI] sn MH. MA ELT X uq == AE \ " H H f a LGR = zi =e Sr | | x M icc M 5 : = Ly - bd " TO MAIN ES || = (13) SHEER Tm

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E LINES INDICATE SIZE OF PLANKS FROM WHICH i MAIN TIMBERS ARE CUT | — 3O' FWD. KEEL

eg STOPWATER a m (4)—KEEL SHOE SECURE WITH 1/2" GALV. fa IRON DRIFT BOLTS sai | l E. Y | l 3 l 1 BASELINE T 4 5 S ->ja 4-6 =< 4-6" an ME UT a see . UTR 24"——ÀX— 5i DECKLINE — -«—— ———— 423 | i Ip ELEM Coen : = ch £ [ £ NI NOTE - DIMENSIONS ARE TO OUTSIDE OF PLANKING £ #3

paint to protect it. This should be the pro- cedure even if the boat is built under cover as wood will last a lot longer if properly pro- tected. The best paint to use is one of the new aluminum primers, now on the market either purchased ready mixed or mixed by yourself, With the frames and transom properly braced, the chines and clamps are bent in, thus tying the structure together rigidly. In bend- ing the chines and clamps the best procedure to follow is to bend them in pairs, thus equal- izing the strain on the two sides of the boat. They are best pulled together with a block May, 1937 x s » and fall fastening them to the stem and working aft They should be procured in one piece if possible, and if this is not possible a butt joint should be made with a reinforcing piece at least three feet long backing up the joint. The inter- mediate frames are now fitted starting from the transom and working forward. Forward of main frame number four they will begin to take curvature and the shape of these frames is obtained by bending thin strips of wood between frame three and the stem and picking up the shape from these strips or rib- bands. The stem rabbet is cut by the same 83

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A GAS MASK FOR Fumigating Purposes sary protection against dangerous fumes. This practical gas mask is made from ordinary household materials. SERVICEABLE gas mask which will prove highly efficient when working in smoke and dust can be easily constructed by anyone from common materials and at little or no cost. While the respirator unit about to be described is not as efficient as some commercial types it is, nevertheless, quite satisfactory for ordinary disinfecting use. A few pieces of duck cloth, leather, cellu- loid, a tin container, cotton wadding and activated charcoal comprise the materials used in making the mask. Most any work- shop will yield all necessary materials except the activated charcoal and this can be ob- tained at the corner drug store. To make the respirator a pattern is first drawn on stiff cardboard to the shape and size shown in the pattern illustration. This size is satisfactory for the average adult. If one 90 A mask for spraying and fumigating purposes is a neces- An army officer de- scribes the construc- tion of a practical fumigation mask. The completed gas mask and basic materials used in constructing mask are pictured above. Left— Two types of commercial masks of practical design. has an unusual face, a little experimentation will enable one to make the required changes in dimensions to meet his particular needs. The facepiece is made from double thick- ness of tightly woven medium weight water- proof duck or leather which is treated on the contact surface between the layers with boiled linseed oil to which has been added 10% of castor oil. The two faceblanks are cut from selected duck cloth according to pattern made as out- lined above. The contact surfaces of the facepieces are dampened with the oil and then stitched in place by hand prior to sewing on a shoe machine. With a little patience all the sewing can be done by hand. Eyepieces are next cut from clear celluloid or cellulose acetate film in the form of squares approximately three inches on the side with Modern Mechanix by Major M. E. Barker, C.W.S. the corners rounded, The eyepieces are then slipped in place between the two layers of the facepiece and the facepiece sewed around the edge of the eyepiece. Cellulose acetate or rubber cement is then applied between the lens and the two layers of the facepiece and the facepiece is sewed through the eyepiece and cement applied to the seam. This pro- cedure is necessary in order to produce a gas tight fit of the eyepieces in a facepiece of this design. A band of soft leather about one inch wide is cut to fit the inside of the facepiece. This is sewed in place with two seams. The purpose of the soft leather is to give an air tight fit between the edge of the facepiece and the face. The chin seam is now put together over a piece of wood slightly smaller than the tin can to be used as a canister. The chin seam is thoroughly sewed in place, the leather band inside the outer edge of the facepiece is cut to give a snug fit, and olive drab colored ad- J |" SOFT LEATHER BAND SEWED AROUND EDGE OF FACEPIECE SEW AROUND EDGE OF. EYEPIECE TO FORM POCKET APPLY RUBBER CEMENT BETWEEN LAYERS AND CELLULOIO BEFORE SEWING CLEAR CELLULOID EYEPIECE , CANISTER PLACE LAYER OF (SEE DETAIL) TAPE AROUND EDGE OF CANNISTER AND FORCE THROUGH FACE- PIECE OPENING CONTACT SURFACES ARE OILED BEFORE SEWING ,’ WIRE FACEPIECE TO CANNISTER -COVER WIRING WITH ADHESIVE TAPE Quickly slipped over the head, the gas mask is ready for immediate use. No annoying breathing tubes are required with this respirator. ABOUT 4" LONG DOUBLE THICKNESS OF DUCK CLOTH 3, ELASTIC BANDS FACEPIECE CUT FROM SELECTED DUCK (SEE DETAIL OF PATTERN) This pictorial diagram shows the construction details of Major Barker's breathing mask. The mask itself is made of leather. The breathing unit is an ordinary tin can containing cotton wadding and activated May, 1937 . USE .FORM SLIGHTLY THAN charcoal. SEWING CHIN SEA! 91

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ROPE STUNTS FOR THE AMATEUR "Escape" ARTIST 7 HANDS ARE SECOND- ROPE IS FIRST PLACED COILED UP AND E ud EACH ( OVER ROPE SHACKLED WRIST ESCAPE TO BE ->| KNOTTED |, SLACKNESS ROPE i$ OBTAINED KNOTTED BY JERKING WRISTS APART DURING THE TYING. MANNER OF LOOPING AND. HOLDING THE DOUBLED ROPES: DOUBLE ROPES G LOOPED TOGETHER S AT BACK OF NECK ROPES BEFORE PULLING THEM FREE. WHILE JERKING, THUMB OF OTHER HAND IS INSERTED IN SIMILAR MAN~ NER TO STRETCH ROPES TO NORMAL APPEARANCE. y PALMS SHOULD p CONCEAL THUMBS. The amateur escape artist can free himself from rope bonds securely tied around his wrists if the rope is wound as indicated in these steps before a member of the audience is permitted to tie up the final knots. ROVIDED with a hank of sash cord any- one with a little practice can put on an escape act that will compare favorably with similar acts performed by professional magicians. While some people are often led to believe that magic acts and illusions can be performed only by those possessing super- natural powers it should be clearly under- stood now and always that there is no magician or any other person relying on any- thing but skill for his effects. This same rule applies to the amateur magician and escape artist and before actually presenting these stunts to your friends be sure that you have mastered them by performing before a mirror or with a confidential assistant. A very good stunt for beginning an escape presentation is the “Shackled Wrist Escape.” Offer a spectator a length of sash cord and instruct him to tie up your hands by wrap- ping it around your wrists and bringing it 94 Although a double rope around the performer's neck apparently passes completely through it, when the ends are pulled by spectators, the rope actually is a double loop locked in the center with thumb and forefinger. Modern Mechanix Although members of the audience are allowed to bind the performer with a one hundred foot coil of sash rope the escape, which involves no trickery, is simple. The performer depends upon human nature for its success. May, 1937 SHOWING METHOD OF CONCEALING THREADED ROPES IN —— HAND THREADED ROPE CENTERS ABOUT SIDE OF WRIST FOR CONCEAL- While apparently bound securely to a chair with doubled rope escape is simple since the ropes are secretly joined together with thread. The joints are concealed from view so that detection by the spectators is almost impossible. down between the hands then wrapping it around the bottom cord as described in the accompanying illustrations. After doing this, permit the spectator to knot the cords as often as he likes so long as he is satisfied that you are securely bound. Now turn to the audi- ence and announce that you will free your bonds before they can count to ten. Saying this, turn your back to the audience and jerk your wrists. The cords will now be sufficiently loose so that you can free your hands in a moment. Like many escape stunts, this one depends upon the method used in tying the knot. "The Strangle Rope Escape" is one of the most effective rope tricks ever devised and unquestionably the simplest to perform. Here the performer makes it appear that after he has been securely bound around the neck with a double rope he allows two spectators to grasp each end of the double rope and [Continued on page 126] 95

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// » [1 Runlite-a RAILER owners incline to divide into two schools of thought; one group wanting the kind of trailer in which they can, if necessary, live permanently—the other preferring some- thing rather lighter and more suitable for use on extended trips, such as vacations, where economy and high cruising speeds are of major importance. Runlite has been designed for the latter group. By placing the wheels quite far aft it has been possible to make this an underslung job, making it directly possible to combine really effective streamlining with marked sta- bility. The weight of the whole trailer being so low, much of the weight is carried by the tongue, a matter of no particular concern in the case of Runlite since it is normal for a load of 150 or even 200 pounds to be dis- tributed on the hitch of all trailers. Runlite can actually be towed at a 60 m. p. h. gait without straining any good light car. Straightforward methods of construction are used in this design. There is practically no welding and absolutely no special machine work to be done. The roof, which at first glance may seem a problem, is actually simpler to construct than that of the average trailer. Another word before starting in on the actual construction work: Comparison will reveal some slight difference between photos and drawings in this article. Itis quite unim- portant and, as far as that goes, the curves, 96 Designed for the person who prefers a light port- able shelter to a more commodious trailer, this lightweight streamlined modern vehicle is note- worthy for its low cost and safety at high speeds. Looking into the “cabin” through the open galley hatch. “Runlite’ has ample space for two full length spring mattresses. Below—Body plan dimensioned to scale. 0 FRONT View & T = 56" TREAD BODY PLAN SCALE Lyi i. L FOOT the width and the over all height may be modified to suit the builder’s requirements. Start with the frame. What few welded joints you will have to make are encountered here. If you lack the proper equipment or experience have the welding done by an expert. The cost will be low and the sense of security a good deal greater. Use an old Model T Ford frame. At your local junk yard these should be anywhere from 75 cents to $2.75. Using a hacksaw, cut out a 13%” length on each side 7” from the front end. Saw out the channels to fit and weld at right angles so that the frame now has a 1344” kick-up as shown in the drawings. Modern Mechanix Traveling Bedroom An angle iron tie piece 1J4"xll4"x45" is welded across the bottom of the frame as shown in the perspective drawing of the frame. At the rear end the rear face of the spring perch is cut off with torch or hacksaw. Into the perch a 2"x4", preferably of white oak, is carefully fitted. This beam should be the full width of the body and its obvious purpose is clearly shown in the drawings. Two more lengths of Ford T frame are used for the trailer tongue and the cross-member to which it is anchored. Joints here may be ‘either by welding or bolting. It will be necessary to cut out the filler piece for the tongue—which is bolted securely to the spring perch as well as to the channel cross piece. Bolt or weld a standard hitch to end of tongue. The height of hitch can be adjusted by heating tongue and bending upwards. Only four leaves of the front spring are used. A shim is put in under the perch clip bottom to compensate for the leaves removed. Second hand Model T steering tie rods are used in the manner shown for radius rods. The ball and socket fixtures for the frame end of the rods are from regular Ford radius rods. They should be welded on, The axle ends of the rods may be attached either by flattening and bolting direct to the wing spring perches, as shown, or drilled clear through the axle and bolted either side. This latter method pro- vides an easy method of aligning the wheels. 20"x4" wheels from a motorcycle pick-up trailer are used. Such wheels fit Model T Ford spindles without change. They cost about $4.00 each and the tires about the same. The completed frame, ball hitch, radius rods. QUTDOOR PROFILE e SCALEFINCHES & FEET STREAMLINE HANOLE AND AUTO LOCK TWO COATS ALUMINUM PIGMENTES DOPE ~ PAINT EXTERIOR IN GUNMETAL OR DEEP GRAY ~, HASP AND PADLOCK UPHOLSTERER'S EDGING (CHEAPER) OR I"X 1/2" ALUM. MOULDING COVERS. TACKED EDGE | TONGUE MAY BE BENT UP TO FIT CAR HITCH USED i | BRAKE aTa ] 3 SS IGHTS BOTH | | "d HITCH TO SUIT i | sbESTOsUT + UT “f= OVERALL LENGTH = I0'- 1" — | L voci: 2 re ders see Mem adi fca um 28g ai? — 24" >- 937 —— efe The profile lines of “Runlite,” accurately scaled above, convey immediately grace and speed of the design. While the basic design should not be tampered with, headroom and width can be increased, if builder wishes, without harming the appear- ance of fast stepping trailerette. Photograph here shows to ad- vantage the charm small trailers of this type hold. Note excel- lent proportions of this vast pocket trailer—its very low- hung position, practical cooking facilities, obvious roominess. Hardly higher than small car, it sleeps and feeds two adults! May, 1937 * UNDER SIDE OF BODY WOODWORK BARN-PAINT RED 97

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wheels and tires should not cost over $20.00 with welding included. The steering tie rod is cut in two, the ends flattened and bolted to the axle as shown. This completes the entire chassis and the rest of the job is straight woodwork (with a little tin work here and there). Build the floor as a foundation for the body. Second grade Oregon pine flooring, tongued and grooved, is bolted to the chassis frame starting at the rear end and working toward the towing end of the trailer. This flooring should be wide enough to finish 6144” wide after trimming the sides for straightness. Rabbet the first plank laid to hold the 1⁄4” bulkhead as shown and. cut out where neces- sary for the spring perch at the towing end. This eut out is later covered with tin—see drawings. Lay a straightedge along the sides and saw off flush. Next screw in the 1"x2" and 2"x2" stringers to the underside of the flooring as shown in the drawings, allowing the ends to project several inches beyond the floor at the rear. Stanchions No. 3 and the 2"x4" uprights are mortised into these projecting ends and the stringers trimmed off flush as shown in the detail sketches. The stanchion framing can now be com- pleted. The heels of the stanchions are boxed into the floor and bolted into the 1"x2" edge or side piece. With the main stanchions in the %” plywood or hard Celotex bulkheads can be installed and the boxes for the wheels built These plan views of the trailer, chassis and floor frame, used in conjunction with indoor profile plans on the following page (and the sectional views of the body), should be studied carefully. up. Framing for cupboards, water tank, sink and so forth is left until the body has been built. Cut out the crown carlins and also the bow plate. Detail drawings give the dimensions and it will be noted that 11 carlins in all are required. Some of these are used for the roof —three being bolted to the main stanchions already installed. The remaining carlins are required for bow and stern, and for the hatch. Install the bow plate in the manner shown. It is cut on a 72” radius, is 34” thick and 634" deep. It is screwed to the riser strip which in turn is bolted to the filler piece in the spring perch. The side clamps or roof strips can now be sawed to shape and mortised into the tops of the stanchions as shown. They may be lightly screwed until the outer sheathing is applied. This sheathing, of fir plywood, 4” thick, or hard Celotex, is screwed directly to the stanchions, floor edges and 1”x2” outer strips. The carlins at front and back of the trailer are put in with knees as shown. Do not apply the sheathing to the front end of the trailer until the roof battens have been bent in. If these prove stiff, soaking for half a day under the lawn sprinkler will render them pliable. They are fastened over the carlins without notches except where they bend into the front, or bow cabin, They are notched flush into this former. Use light screws to secure the roof battens. The lift-up cover over the galley, called a hatch in the drawings, is built up in the manner shown. The longitudinal carlins are cut to the same sweep as the roof from 34" STANCHIONS — ( I sheata DOOR STOP © WHEEL BOXES PLY- HATCH LIMITS ANGULAR SPLASH BOARD WOOD OR SHT METAL det 4. var sheathing 1B" X 13/4" W. OAK UPRIGHT MORTISE INTO BOW PLATE 233 STANDARD HITCH 62» Y— =] 29" aly" isl 1374" x (n [osten CARUNS fi I> To SAME 77A CURVEAS V] | HEROO LÀ I tinus DRILL FOR la" STOVE LTS u \ CUT OUT FLOOR HERE FOR FRAME. UPSET AND COVER LATER WITH TIN BOW PLATE OR CARLIN — | CUT FROM 3/4 5-PLY \ ON 74" RADIUS a I X 2" RISER OAK Fil R PIECE Y pastas Ne = HALF-PLANS OF FLOOR AND CHASSIS FRAME * NOTE-IF LARGER WHEELS ARE USED-WIDEN BODY TO SUIT Yo BOLT: DX FORO MODEL "T" FRAME SHEATHING LINE- NOTE SHEATHING LIRON 3/4" X6" OREGON CROSS BS\ , REMOVEABLE SHELF PINE FLOORING TIE B FORSINKANDSTOVE | HUE FRAME KICK-UP i i 1 PLYWOOD 1 BULKHEADS J I SEE PERSPECTIVE | za i ! FOR COMPLETE. jd Vae DETAILS 20" X 4" WHEELS M———— 283" ——» o [ 2 SCALE IN FEET 98 Modern Mechanix Drawing above, in conjunction with the cross-section drawing below, gives many details and dimensions which will be help- ful to builder. Lines for curve of roof edge should be taken off "outdoor" profile drawing, : or at least checked from that = plan. Completed body, ready to be covered, shown at right, will aid in reading the plans shown. plywood. Cut out four of these carlins, two of them being permanently attached to the stern portion of the body frame as shown. The other two of course form the sides of the hatch itself. A tin gutter should be hammered out and fitted along the edges of the hatch opening in the manner shown. Attach the sheathing to the front end now. It will bend to the slight curve quite easily. The door is clearly indicated. Lock ar- rangement and so on is left to the builder though a streamlined blind door handle was used on the trailer pictured. A 12” porthole is.cut into the door and another one exactly opposite in the sheathing on the other side. A screen is secured to the outside of each port and inside they are furnished with hinged windows as clearly shown. Glass or May, 1937 ae sotto // si Arch OR CARLIN ROOF CARLIN-A 3 | | HATCHUMITS, (HALF BREADTH) io 7 M SINK AND. "our FRAME honge iz oi 225— —4 LOOKING AET & LOOKING FORWARD SECTION THROUGH BODY AT STANCHION NO.3 ` TOGGLE BEND TO FORM HOLDING HOOK pem E STANCHION SYP NUMBER 3 RAKE OD AND. OAK FILLER PIECE L È 4 ! MOULDING

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airplane windshield pyralin are equally satis- factory for these windows. It has been found that the two ports provide ample ventilation for even the hottest weather. The next step is to cover the roof. Use grade A muslin costing 18 to 24 cents a yard at most stores. Start at the front end, tacking on 1” centers with small carpet tacks, and stretch lightly over the sides as you proceed toward the rear until the tail carlin is reached. x With two gallons of aluminum pigmented DETAIL 'C! TYPICAL nitrate dope you will be able to render the NT roof drum tight and waterproof. Correct procedure in doping cloth is to lay the first coat on around the edges and work toward the center. The edges can be finished with either aluminum edging or regular uphol- sterer’s edging. Both are obtainable at auto- mobile stores. The galley is pretty thoroughly covered in the various drawings. The space formed by the two bulkheads makes a good place for odd clothes or other stowage. It extends from wheel box to wheel box, is 13” deep and about 8” wide. ROOF CARLIN NOTCH FLOOR AND OUTSIDE 1X2" STRINGER SI. MACHINEOR CARRIAGE BOLT NOTCH LATER FOR 1" X 13/4" SIDE CLAMPS MACHINE OR CARRIAGE BOLT COUNTERSINK HEAD DETAIL'A' - TYPICAL SIDE FRAMING JOINT. STRIP RABBET FOR BULKHEAD nx 2" DETAIL 'BB'- FRAMING JOINTS AT AFTER END NOTE HOW STRINGERS PRO- JECT BEYOND THE FLOORING BOLT SAW OFF REAR FACE OF SPRING PERCHIN IN. ORDER TO FIT THE OAK FILLER # 3 ROOF CARLIN CELOTEX OR 1/4" 3-PLY SHEATHING 1" X 13/4" W. OAK SIDE CLAMPS SCREW OR BOLT TO CLEAT | REMOVEABLE SINK SHELF- CUT TOFIT FROM 1/2" CELOTEX SET INTO BOWPLATE PINE RISER == = WHEEL BOX-TOR S SIDE PANEL AND SLANTING BACK Š EN SSA NOTCH FOR STRINGERS X 2" SHELF zz FRAMING aux ou myx au j SEE DETAIL 'A' FOR MORTISED JOINT 3/4" X 6" SECOND GRADE T. & G. PINE FLOORING SEE DETAILS 'B B' FOR N 5 Sui METHOD OF MORTISING JOINT E M M CUT ANDFLATTEN TIE RODEN HERE VÍ/&" X 1174" X 3/16" ANGLE IRON BOLT FLATTENED END TO AXLE FLATTEN ENDS OF RADIUS RODS — BOLT HERE A X 4" WHEELS FIT FORD MODEL r S sax. = SPINDLES WITHOUT ALTERATIONS GENERAL PERSPECTIVE CONSTRUCTION DRAWING SHOWING FLOORING AND OTHER FRAMING DETAIL This important construction drawing is not in scale but is arranged to show the general detail of the chassis, the flooring and—above—the principal stanchion joints. Note how the frame is "kicked up" in order to undersling the trailer. Note also the framing about the wheel boxes and the installation of the bulkheads and the bow plate. Study with the photo at right. 100 Modern Mechanix ` Immediately aft of this compartment the sink and stove shelf is located. This shelf is made readily detachable so that the axle may be inspected if necessary or to per- mit the easy placing of a jack under the axle in case of flat tires. The shelf rests on a light framing of 1”x2” pine as shown in the drawings. It can be held in place by a few light screws or by four wing nuts. The stove is secured to it in the manner shown and a simple sink can be made from a large cake pan and set into the shelf with small screws. A muslin apron, tacked from shelf carlin to rear carlin and from wheel box inner panels, serves to keep the dust out, This apron should be doped. The tank for water may be any size and the details of its installation will naturally depend upon the size used. In any case it should be so arranged as to empty directly into the sink. Cupboards and shelves may be any way you prefer. A 7 BATTENS: SIZE AND SPACING AS. IN. ROOF DETAIL. OF HATCH MUSLIN COVERING ERAME TACK DOWN HATCH FRAMING (CARLINS) 3/4" X i 3/4" S-PLY FIR PA : STIFFEN WITH TRI- LA ANGULAR BLOCKS — LA A| | — MUSLIN DUST APRON.TACK TO REAR : CARLINS AND DOPE (| li Here is an exceptionally clear picture of the simple door. It may be varied but it is hard to improve for simplicity and sturdy construction. Note the blind door handle box—not shown in the drawings below. CUT OUT ALL ROOF AND END CARLINS THUS FROM lu 3/4" S-PLY FIR z 4 GLASS OR PYRALIN SCREEN SHEATHING TO CLEAR FLOOR DETAIL OF DOOR SHOWING FLOOR LEVEL HINGED GLASS WINDOWCLOSEO CUT OUT INSIDE PANELS OF WHEEL BOXES TO PRO- VIDE CLEARANCE WHERE THE AXLE PASSES THRU. BODY DETAILS - NOTE-FASTEN BATTENS AND SHEATHING BY MEANS OF LIGHT BRASS OR COPPER SCREWS The roof carlins or beams ate cut in the manner shown above. Galley hatch side carlins are cut to normal profile body lines. Large blueprint plans for building "Runlite'" printed on tough rag content paper are available from Modern Mechanix Publ. Co., 1501 Broadway, New York City. RUNLITE BLUEPRINTS Order Blueprint No. T-29 at $2.00 May, 1937 101

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" aS 2mo HANDRAIL | ; f, BOTH SIDES WIRING TO LOCOMOTIVE OUMMY COAL LOAD Se SWITCH LEFT SIDE FRÓNT STEPS SEE DETAIL. SKETCH BELOW REAR COUPLER HANGER DRAWBAR LINE THUS" |. IN WHITE A Z REAR “4 BODY PLAN VIEW — Dimensions for con- structing "Midget Mike's" tender ate given in the above profile body plans. by Hugh Nason N THE March and April issues of MODERN Mecuanrx the construction of the motive power unit of “Midget Mike” was described. This tiny 00 gauge locomotive possessed several unique features, the most important one being that it could be constructed from ordinary materials obtainable anywhere. Brass tubing, channel and a few pieces of tin in the hands of a careful craftsman resulted in a powerful locomotive having ample traction to pull loads exceeding fifteen pounds. In this, the final installment, we take up the con- struction of the tender; the reverse mechanism and the wiring detail. The tender is built of wood, brass sheet and odd ends of brass or tin. The floor of the tender is a piece of pine 134” wide, 4&" thick and 3%” long. The sides and rear end are formed from one piece of 26 ga. brass. The whole assembly is graphically shown in Fig. T-1. In fact the accompanying drawings are unusually detailed and clear so that a careful study of them provides adequate instruction for building the tender. However, a few brief notes are added for the further con- venience of the builder. Make a template of the two sides and the back end first. Take the dimensions off the 104 Peppa EE E -LNCH PROFILE z STANDARD 00 GAUGE 4,87... NASON TRUCKS 16 = 3 FRONT T" MANUAL . | Cv. REVERSE LADDER SIDE STRIP. OPTIONAL TYPE OF HANDRAIL BRASS SMALL BRASS SCREW FRONT DETAIL The tender is formed from either sheet tin or brass and mounted on a wooden chassis to which “bought” trucks are attached. Front details are shown here. plans in Fig. T-2 and do not forget to allow for the bend when laying out the template. Scribe the bend lines with pencil to avoid cracking the brass sheet when bending later. Do not use a hammer to form the bend, a mallet is better, and use care to have the job square. Fasten the metal body to the wood floor in the manner shown, filing off the heads of the 32" brass woodscrews clear to the shank after first flowing solder around each screw head so that it reaches the shank. The chassis or underframe is built up as shown. The actual construction of the front steps and front sill may be varied as the builder desires as long as the appearance shown is retained. The rear end sill is cut out as shown in the details given in Fig. T-3 and Fig. T-1. The length of the drawbar may vary slightly to suit the radius of the curves on the track used. Bend the front plate to shape as shown and solder in place. The coal Modern Mechanix compartment back piece is also soldered in but at a slant as shown. The cover of the water tank may be cigar box wood or any 44” material. The support posts should be just high enough to bring the cover exactly level with the tender sides when it is placed in position. Allow a slight gap on one side to accommodate the reverse switch lever. The tank filler cap serves as a convenient handle to remove the cover when it is desired to get at the reversing unit. Standard Nason 00 gauge trucks are specified. Small brass screws are used to pivot the trucks to the center sill where the cross-bolsters occur. In making the dummy coal load be sure to leave space beneath it for the several wires which run from tender to locomotive. A hole is likewise drilled in the front plate for the wires to pass through. SHORT LENGTH OF 3/8" DIAM. DOWEL - —3- GLUE TO COVER ` I SS D { MANNER FASTENING SPRINKLE FINE COAL SIDES TO OVER FILM OF GLUE TO OBTAIN EFFECT OF COAL LOAD BALSA BLOCK CUT OUT TO i FIT ENDPLATE | SOLDER AND FILE ; HEAD DOWN FLUSH N RESTS ON | E : POSTS | FRONT PLATE, OR . à À END PIECE SHAPE COAL COMPARTMENT j K BUILD UP STEPS FROM TIN OR THIN ; x ~ BACK PLATE ——/ y E TT TES j FROM THIN BRASS BRASS.. SEE FIG.T-2 ` 2: My p ai ‘ STRIP OR WIRE FOR SCALE PLANS x p / x pes b 1 f mo sid iN i / / / AL GEH E E E LH BRRRAS i "s mitt / 2 [ee |] soLDER d DRILL FOR s HANDRAIL i SIDES AND BACK SINGLE PIECE OF 26GA. BRASS PUSH THIS TANK COVER END INTO | i € SUPPORTS FLOOR Ji pum —7 n $ a DRILL FOR 1/20 END SILL-CUT d ; Y 1 /OODSCREWS — FROM 178" X 1/4" f= = A SEE DETAIL ABOVI LIGHT BRASS WIRE BUILD UP FRONT SILL AND STEPS THUS MAKE DRAWBAR OF 1/32" BRASS- LENGTH TO SUIT TRACK RADIUS ELP FIG. T-I - COMPONENT PARTS AND ASSEMBLY OF THE TENDER BODY AND CHASSIS FRAME 3/8" BRASS SCREW This perspective assembly plan shows the components used in building the tender and how they are fitted together, Note the additional “collector” on tender, SIDE STRIP. May, 1937 . 105

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FIG.T-3 LONGITUDINAL SEGTION THRU TENDER BACK PIECE,OR COAL COMPT. DIVISION REVERSE MECHANISM TANK COVER 28 Le — C. SEE CROSS yum ~> SECTION SEEFIG.T-S H FOROETAIL. 1/8" SQ COVER FIG1-4 SIDE STRIPS- MAKE 2 OF tB" x 1/8" PINE. NAIL TO FLOOR OF l/4" X 3/16" MATERIAL FURTHER DETAILS OF THE CHASSIS UNDERFRAME PARTS Simple fitting such as ladder and handrails are suggested. Other fittings—dummy air brake cylinder, tool boxes, etc., may be added to suit. With this work completed the loco- motive is ready for painting. To prepare the model for painting, remove the motor and wash the parts with hot water to which "Oakite" has been dissolved. This solution will take off all grease which has gathered on the model. Then rinse in vinegar and put in a warm place to dry. Be careful not to handle the model or the paint will not adhere to the grease from your fingers. To hold the model while painting, wrap the part you are holding with a soft cloth. Now using a good quality flat black enamel, paint the entire engine and tender black except the tires on the drivers, the top of the tender, drive rods, cross head guides, piston rods and valve rods. These parts are painted with aluminum paint. The reverse unit is located in the tender of "Midget Mike.” This device, which is easily 106 PATTERN FOR COAL COMPART- MENT DIVISION 26 GA. BRASS The tender, as this plan makes clear, serves as the housing for the motor re- versing switch which is con- cealed by a “dummy” fiber i6THs. 8THS. ONE INCH——> tank covering. The switch is j ,| | | described on opposite page. i constructed, is designed for manual reversing of the engine as shown in Fig. 5. The base is a piece of 34" brass channel 1" long to which one spring brass contact is riveted as shown on the end view. The fiber block which is used as a base for the other three contacts is a piece of standard 1⁄2” by 1⁄4” fiber cut to a length of 11". Cut a groove in the bottom to clear the bottom contact. Drill a No. 43 hole in each side of the channel as shown in the side view. Push the fiber block in place and drill No. 50 and tap 2-56 to match the two holes already drilled. Fasten the block in place with brass 2-56 screws. Now drill three No. 50 holes for the upper contacts and tap 2-56. To make the rotor cut a piece of y” diameter thin wall brass tube to a length of Ru £5". Cut out as shown in the detail of the Modern Mechanix | | rotor, but do not separate the two parts until a 5g” length of 14" diameter fiber tube with an Y&" hole has been driven into the brass tube and projects slightly at both ends. Then cut as shown on the plans with a fine hacksaw or jeweler's saw. Note they are cut at opposite ends. Drill a No. 28 hole in each side of the channel as indicated, then insert the %” rod in one side, drive through the rotor and then through the other side of the channe until it projects about 4%”. The other three contacts are now cut of spring brass and are a little more than %” wide. Drill a No. 44 hole in each as indicated and fasten to the fiber block with !&" long 2-56 brass machine screws. A No. 60 hole is drilled in the rotor shaft to take the reversing handle, which is a piece of brass wire soldered in place. Wire the reverse unit according to the diagram given. Solder a strip of brass on the bottom so that it can be screwed to the floor of the tender with brass wood screws. The reverse arm projects up through the slot between the tender side and tank cover.. So that the reversing switch can be grasped easily; bend the end of the arm outward so as to form an "L^ shaped handle. The proper location of this unit is shown in the cross section draw- ings of Fig. T-3. An additional collector is mounted under- neath the chassis of the tender and is identical in construction to the one used on the loco- ] TERMINAL BLOCK CONNECTIONS motive, itself, and described in a previous installment. Wire up the reversing unit to the motor carefully, otherwise your motor will not run in either direction. If difficulty is ex- perienced in connecting the reverse switch, some experimenting will soon reveal the cor- rect hookup required. "Midget Mike" is now complete and ready for hauling its first train. If you are a new convert to this hobby it will, of course, be necessary for you to construct your track layout. Tracks are laid in much the same manner as the conventional railroad rails using brass track and miniature ties. These materials are available from any model rail- way supply house. A test run with “Midget Mike” will start you on a hobby with endless thrills and one that offers the craftsman with little or much money the maximum from his investment. "MIDGET MIKE" BLUEPRINT PLANS Complete plans for building "Midget Mike" in actual scale size are available in blueprint form at $3.00 per set. The plans are printed on genuine tough rag content blueprint paper to withstand rough workshop usage. Order blueprint No. M-408 from: Modern Mechanix Publ. Co., Greenwich, Conn. FIGS DETAILS OF THE HAND REVERSE UNIT AND WIRING DIAGRAM BRASS SCREWS, 2-56 1/8" LONG ORILL FOR we LEADS NOTE: SOLDER WIRES #1 AND #4 DIRECT TO MOTOR BRUSHES 3RD. RAIL COLLECTOR (LOCOMOTIVE) N, The electric motor is pur- chased ready made, and wired to the reversing unit lo- cated in the tank. Detailed construction of the switch L FIBER TUBE V8" DIAM. HOLE 9/32" DIAM, THIN WALL BRASS TUBE CUT OUT AS SHOWN, SPRING BRASS CONTACT: SOLDI SEPARATE BY SAWING THRU TUBE WALL AFTE INSERTING FIBER TUBE 4 3RD. RAIL ERG SRS COLLECTOR (TENDER) ORILL & ES 1 it 1 s l f TAP 2-56 in 8 DRILL #28 is described in the diagrams. May, 1937

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OR the rural listener who does not have access to city eurrent nothing is quite as annoying as the constant difficulties experi- enced with early battery receivers suddenly going dead in the middle of a program. Ancient circuits and faulty tubes, subject to Wiring 5-tube rural receiver from this pictorial plan makes it extremely easy to construct. Chassis measures 10"x10"x3". SPEAKER PLUG ~ 110 Rural fans no longer need be without a modern metal tube radio. A single battery supplies current. microphonic noises, are responsible for much of the trouble and a new set of batteries every week will do little to improve or insure re- ception. With the advent of the vibrator B power supply the farm receiver procured a new lease on life, for the unit “made it possible to employ modern circuit designs in these sets. BN Aw f R2 TONE CONTROL „oK e WITH SWITCH T : INDICATES ` CONNECTION TO CHASSIS Modern Mechanix ALL-WAVE FARM SET by H. L. Warner The vibrator device is a unique apparatus that converts 6 or 32-volt direct current into alter- nating so that it can be increased to any desired voltage by feeding it into a power step-up transformer and rectifying it in the same manner as the current used in electric receivers operating on city current. In designing this modern all-wave rural receiver only parts which could be obtained at any radio supply house were selected. These were arranged into an ingenious circuit which employs five metal tubes and provides maximum efficiency. A wave switch of simple design permits rapid tuning from long wave to short with ample volume on both European MAGNETIC SPEAKER CONNECT TO 6 VOLT \ STORAGE BATTERY PLUG-IN — VIBRATOR Converting 6-volt battery current into high voltage, for operating radio, this B power unit completely eliminates use of B and C batteries formerly used. May, 1937 Shown in this drawing are the receiver, permanent dy- namic speaker and B power unit. Complete set can be in- stalled in a console cabinet. and American broadcasts. In addition to the all-wave tuning this set features a tone control and permanent dynamic speaker, neither of which are found on the obsolete farm set. To start actual construction on the set first form the chassis from a sheet of aluminum or electralloy so that when bent to shape it measures 10" by 10" by 3". Before bending the chassis to shape holes for sockets should be cut in the top with a fly cutter using the template diagram as a guide. With the various holes completed, start - assembling the receiver’s components in their respective positions inside the chassis. Mount the five octal 8-prong tube sockets first; next the tuning coil assembly, switch inside, coils on top of chassis and last install the 3-gang tuning condenser. All parts are fastened to the chassis with 6/32 brass machine screws and hex nuts to match. Bolt all parts securely so that there is no chance for them to work loose. Since all resistors and condensers used in this set are provided with “pigtail” leads a considerable amount of wiring is eliminated by sliding insulating spaghetti tubing over these leads and soldering them directly into i

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TUNER CHASSIS | Receiver and power unit chassis are cut according to these templates. Wind RFC-2 in power unit as shown. The schematic circuit of the metal tube rural receiver provides an accurate check on the builder's wiring if pictorial plan is followed. Parts are indicated in box. 112 40 TURNS Ol NO. 16 ENAMEL their respective places. All resistances are of the carbon type and rated at 1 watt. Tubular fixed condensers are all rated at 400 volts except the two .25 mfd. which are rated at 200 volts and the 10 and 25 mfd. which are rated at 35. The latter two condensers are electrolytics. Wire up the receiver with care making sure that all connections are soldered to the right places. Following the pictorial diagram | will simplify the wiring up of the receiver to a considerable extent. Shielded cables are required in several parts of the circuit. The lead from the center terminal of the volume control to the cap of the 6Q7 tube should be enclosed in a shielded covering and the shield grounded to the receiver chassis. Cables connecting the vibrator power supply to the set are also enclosed in a shield which is grounded to the chassis of set and power supply. After completing the wiring of the set form the chassis for the B » power supply unit and assemble the NY. various parts used in its construc- tion by following the pictorial dia- gram. Transformer, electrolytic condensers, vibrator and rectifior tube are all standard parts, there- fore there will be no diffieulty in PARTS VALUES Gly c2, S 3 GANG .00037 tee CONDENSER ONDENSER VOLT PAPER CONDENSER ee F MFO. 400 VOLT La SERES FD. 200 VOLT PAPER CONDEI Soe LY MFO. E VOLT ELECTROUYTIG CONDENSER Cll—.} MFO. 400 VOLT PAPER CONDENSER EE PR MED, SS D MN PE CEOTIBLYTIUE CONDENSER Re 100,000 OHM Tone CONTROL POTENTIOMETER IM 1/2 WATT RESISTOR IM 144 WATT RESISTOR A WATT RESISTOR IM | WATT RESISTOR v MATT RESTOR IM RESISTI VOLUME T ONTROL POTENTIOMETER 1 T RON ORS ui TRANSFORMER ^ aue KG IST STAGE IRON CORE IF. ERA NS EMEN 456 KC 2ND STAGE PL~ PILOT LIGHT 6.3 VOLT Modern Mechanix purchasing them. Three tube sockets are mounted on the recti- fier chassis for connecting the receiver cable, rectifier tube and vibrator unit. Mount these parts with machine screws in the same manner as the set components installing lock washers under the hex nuts to pre- vent parts working loose from the vibration of the transformer and vibrator. After wiring the B power supply connect a shielded battery cable, such as used in auto- mobile receivers and fitted with a built-in fuse, to a six-volt storage battery. Connect thereceivercable plug in the side of the power unit and the all-wave receiver is ready for its first test.- Unless your all-wave coil assembly is sup- plied with a matched gang condenser it will be necessary to have the completed set balanced with an oscillator. If the builder does not own this instrument he can have the work done by a local radio serviceman atasmallcharge. After the receiver has been balanced correctly it is ready for use. Con- nect an antenna of not more than 75 feet in length to the antenna post and a good ground connection to the ground post. The tubes will require a few seconds to heat up before re- ception can be obtained after which either broadcast, police or foreign stations can be tuned in with a single dial control and the snap of a switch. The tone control permits the permanent dynamic speaker to respond to all tone ranges just like any other modern receiver. \ Nn 8 MAGNETIC SPEAKER GROUND TO CHASSIS 4 PRONG PLUG AND SOCKET May, 1937 6 PRONG M - + 6 VOLT BATTERY The simplicity of the wiring up of the receiver is indicated in this photograph showing a bottom view of the all-wave receiver and B vibrator power unit. Although only five tubes are employed in the circuit of this receiver their modern con- struction and high efficiency results in more than enough volume for home requirements. In many localities powerful European sta- tions can be tuned-in with the volume of local broadcasters. Interesting police, airplane and amateur broadcasts can be tuned in at any time to provide new thrills in radio re- ception. The finished set can be installed in a console cabinet making it an attractive decoration and luxury for any rural home. The set can be operated at no cost by attaching a wind- charger to the storage battery. Plans for building an efficient windcharger plant are available from Modern Mechanix Blueprint Dept., Greenwich, Conn., at 50c. The schematic circuit of the B power supply is shown here along with a list of materials required. RFC-2 is homemade and consists of 40 turns of No. 16 enameled wire, layer wound, to fill a 14” by 2" spool or fiber tube. PARTS VALUES m END. 500 VOUT ELECTROLYTIC CONDENSER CIG — .02 MFD. 600 VOLT PAPER CONDENSER CI7 = .O1 MFD, Cl8— .5 MFD. 400 vour " " RFC | — 30 MH CHOKE CH.3 — 30 HENRY FILTER CHOKE T3 6 VOLT POWER TRANSFORMER 113

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