)Unninger's Amazing Buzz Saw Illusion Prizes for Best Solutions
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SEPTEMBER ti 11 )unninger's Amazing Buzz Saw Illusion Prizes for Best Solutions Dr. Worden's $600,000 Hobby By Alfred M. Caddell www.americanradiohistory.com ßes4Gallonof CAS . ßt0 O ... .......... .... ES i. Humidifier to eit. Carbon Eliminatot Man with Car for Makes of Cars, Trucks, Tractors Spare or Full Time all and Engines $350 to $1500 a month An amazing Scientific Humidifier has been patented throughout the 1 man $4,939.66 in 3% months. Another $1,656.60 in 58 days. World that beats any ever got out. It makes engines run ALL THE $5,150.00 in 5 months to another. TIME with the same wonderful efficiency they do on a cool moist night. It gives MORE BIG MONEY can be-IS being made. pep and power, HIGHER top speed, eliminates hard carbon, and gives AMAZING mileage. Fords report 28 to 42 miles per gallon. Other makes (both American and Foreign) report Fitting Motors With Vix marvelous increases of % to double mileage. Some of the best records are: One man. sold 8 first morning. Another sells all 3 men can install. Miles Miles Miles Miles Another's profits as high as $100.00 Buick. 281/2 Essex 32 Nash 30 Pierce Arrow 22 a day. Cadillac. 211/2; Ford (Model T)....42 Oakland 31 Pontiac 31 VIX sells itself by 8 STARTLING Chevrolet 41 Ford (Model A)....40 Oldsmobile 341/2 Rao 261/2 demonstrations BIG, STUNNING, Chrysler 30 V, Hudson 23% Packard... 211/2 Studebaker 29 ASTOUNDING -DEMONSTRATIONS. Dodge 3111/2 Hupmobile... 241/2 Plymouth.. 29 Whippet 41 Successful VIX men make MORE MON- Durant;.... 41 V, Marmon 211/2 Graham-Paige.... 231/2 Willys- Knight.....29 EY than they ever made before. And Hundreds of Other Wonderful Records on ALL American and Foreign Makes Try This New Principle Free Trial Gas Saver AT MY RISK Try this wonderful VIX Moisture Humidifier and Carbon Eliminator AT MY RISK on YOUR OWN CAR to prove that VAPOR MOISTURE (drawn from Radiator to Engine) gives you that wonderful night driving effect ALL THE TIME with MORE mileage from gas and oil- eliminates hard carbon i accumulation - gives MORE power, a SNAPPIER, PEPPIER motor. FASTER acceleration, a SMOOTHER, QUIETER running engine and HIGHER top speed. VIX will PROVE ITS MONEY SAVING MERIT on your own car by 8 DEMONSTRATIONS- conducted by yourself AT MY RISK -the most SENSATIONAL, most ASTOUNDING, most CON- VINCING DEMONSTRATIONS you ever saw. If you don't find from your tests that it does MORE than I claim, return it and it COSTS YOU NOTHING. I want wide- awake, hustling, County, State, Province and National Agencies everywhere, part or full time, to make $350 to $1500 per month filling the great DEMAND for this wonderful invention wherever introduced. Write for my FREE TRIAL and MONEY MAKING OFFER. Use coupon below. WALTER CRITCHLOW Inventor and Manufacturer,863- KStreet, WHEATON, III., U. S. A. Pictures here and at top show Model `B" VIX attached to my own New Model A Ford. This car is wonderfully im- FIOEEV!IV proved in performance with the VIX Moisture of fer aII NOW Humidifier. So is every Auto, Truck, Tractor. WALTER CRITCHLOW Taxi, Bus, Marine, Sta- INVENTOR and MANUFACTURER tionary and Aircraft En- 1 gine, both American and 863 -K Street, Wheaton, Ill., U.'S. A. all Foreign makes. Please send me 'without obligation or charge III your FREE TRIAL and MONEY MAKING N GUARANTEED TO VIX OFFER. to 1/2 Gas Name Carbon AYE.1/4 Cleaning s Engine Repairs Address or Costs You Nothing Town State www.americanradiohistory.com September, 1929 Science and Invention 385 !. Have your the Courage to take it? --This $2000,000 Çuarantee of aJobanaRaise OF course you'd like to earn $50 or $75 or $100 a week -you'd like to do J more interesting work -you'd like to get into a line that offers a real future -but do you know how to go about getting these things ? If you have been thinking of "taking a course" but have held back be- cause you were afraid you didn't have education enough to learn better -paid work -if you have hesitated to take the risk that it would actually land you in the better position and increase your salary -then here's the best news you ever heard in your life! I want to tell you about DRAFTING, and show you that it offers you everything in pay and opportunity that you could hope for. I want to show you that a fine Drafting job is now easily within your reach. And I want to set before you an amazing plan which we have worked out with the co- operation of some of the biggest employers and engineers in America, to prepare you at home, in spare -time, get you the job and raise Get this your pay -absolutely without risk of a penny on your part. Come Into DRAFTING! 'No-Risk" Plan! "Only one other »tan and I, of six taking Cali- I wish I had the room here to tell you all about DRAFT- f ornia State Boardexa»t- Thousands of men -not a bit smarter than you, with no more schooling ING -how it has become the most important jitation for Archittti, or experience -have gone from poorly paid positions as clerks, mechanics, branch passed. Then I realized the of every kind of manufacturing and building thorough and practical building trade workers and laborers into Drafting positions paying $50 construc- tion work-how fascinating the work is training given by Ameri- to $100 a week, with our help. Now with a job and a raise waiting for -the fine bunch can School. I»18 months of fellows I have gone from tracer to you as soon as you are ready for it, all it takes is the COURAGE to go you'll work with -the big salaries paid -the Chief Draftsman, in wonderful chances for advancement. charge of all architectural after it -now if you remain in the rut it's because you choose to, not How, while Draft- and engineering work in you have to. ing is white- collar office work, it is hooked up closely one of the oldest offices because here." with big projects and big men, and offers the thrill that R. L. WARREN, goes with making plans Los Angeles, Calif. which govern every move of the men who do the work. All this inside dope takes a Drafting Lessons 36 -page book to describe and I'll be glad to send you a copy free when you mail the coupon for my Actually FREE to no -risk job and raise.t_ plan. show you how interesting Director Extension Work. and simple Drafting is THE AMERICAN SCHOOL " tilteiz I started Ant r- Dept. 11.653 Drexel Ave. and 58th St., Chicago, Ill. ican School training in Maybe you think Drafting is "over your head" it 11 e Spring of 1915 I -that Please send without cost or obligation, 3 Drafting was working 14 hours a takes artistic talent or some ability you haven't got. In that Lessons, 36 -page book with the inside dope about t ght, seven nights a week case you have a pleasant surprise coming to you. For I'll be Drafting and your no -risk plan and guarantee to for $1.83 a night. That glad to send you the first three lessons from our home- train- prepare me, to place me and raise my pay, or no cost. Fall I got a job in the i ng to you drawing of s mechani- Engineering Dept. of a show that the plansi purely large firm near here. To- cal, easily learned and the mostinteresting kind of work you Naine day I work 5; days a ever tackled. It takes little enough courage to look into this week and my salary is wonderful opportunity -just mail the coupon and see for yourself how you St. No larger than I ever dream- like Drafting and our guaranteed way to get into it. ed of when I began that course in Mechanical City Slate Drafting." D -653 .B. H. SEAVERNS, Dept. Drexel Ave. Age Occupation South Bend, Ind. The American School and 58th St., Chicago, I11. www.americanradiohistory.com This Issue Contains These UP-TO-THE-MINUTE Articles by WELL-KNOWN Authors General Science Aviation California Wins !- Frontispiece 388 California Wins 1- Frontispiece 388 -Editorial 392 Crack Ups 402 Dunninger's Amazing Buzz Saw Illusion -Over Giant Voice Helps Zep Land 412 96250.00 in Prizes for Best Solutions 394 Aviation Up -to -Date 416 Dr. Worden's $600,000.00 Hobby 396 Smashing Aviation Records 420 By Alfred M. Caddell Building a Sport Plane Part 2- Conclusion.... 428 Slater Refuses Our Spirit Test 398 Hints on Flying a Glider 431 Television in Colors 400 By Dr. Herbert E. Ives, Member Technical Staff, Chemistry and Electricity Bell Telephone Laboratories Television in Colors 400 Crack Ups 402 Experiments With Little -Known Chemicals 426 By Joseph. H. Kraus Wrinkles, Recipes and Formulas 435 Stereoscopic Movies With Color and Voice in the Making 405 Home Movies By H. Winfield Secor Animals That Learned to Fly 406 "Home Movies " -A Monthly Department 421 By Dr. Ernest Bade, Ph.D. Conducted by Don Bennett Scientific Progress 408 Coal Miner's Job Safer Than .Yours ! 410 Automotive By Alvin F. Harlow The Truth About Gasoline Savers 422 Giant Voice Helps Zep Land 412 By George A. Lacers, Automotive Engineer The Modern Sherlock Holmes 413 Motor Hints -A Monthly Department 423 Valuable Time and Labor Savers for Your Home 414 Aviation Up -to -Date 416 Television Is Education Worth While Opinions a College ?- Television in Colors 400 of Eminent People 418 Smashing Aviation Records 420 Magic-A Monthly Feature 424 Radio By Dunninger You Can Call Your Home From Moving Train 438 How a Roller Coaster Demonstrates Relativity 425 A Radio Robot 439 By Donald H.