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STATION' 40 NDP-TECMNICAL, RADIO \ ARTICLES EXPERIMENTER PUBLISHING COMPANY, NEW YORK, PUBLISHERS OF RADIO NEWS - SCIENCE & INVENTION - THE EXPERIMENTER - MOTOR CAMPER & TOURIST T-. www.americanradiohistory.com Be a Radio Expert Get into the great new Big -Pay Industry-Radio. If you're earn- ing a penny less than $50 a week, clip coupon now. Send for AMAZ- ING FREE BOOK. Be a Radio Expert, and draw down big money for the easiest and most fascinating work in the world. Positions everywhere. Thoroughly -trained men are in big demand. Need for Radio Experts in every community. Short hours. BIG PAY. Free book gives all the facts. Astonishing opportunities-thousands of them ! Every day N. R. I. trained men are taking good places in the Radio field. Free book tells all about their success. Send for it now ! LEARN QUICKLY AND EASILY AT HOME Operates WMAQ Master Radio Engineers will show you how to qualify "Accepted a position with quickly and easily at home, for Radio's fine jobs. 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Look What These Cooke Trained Men Are Earning It's a shame for you to earn $15 or $20 or $30 Makes $700 in 24 a week, when in the same six days as an Elec- Days in Radio trical Expert you could make $70 to $200-and "Thanks to your interesting Course I made over $700 in 24 do it easier-not work half so hard. Why then clays in Radio. Of course, this remain in the small -pay game, in is a little above the average a line of work that offers no chance, but I run from $10 to $40 clear no big promotion, no big income? Fit yourself for a real job in the profit every day, so you can see what your training has great electrical industry. I'll show you how. done for me." - RED G. McNABB, 848 Spring St., Atlanta, Georgia $70 to $80 a Be an Electrical Expert week for Jacquot "Now I am specializing in Earn $3,500 to $10,000 a Year Auto Electricity and battery Today even the ordinary Electrician-the work and make from $70 to "screw driver" kind-is making money-big $80 a week and am just getting money. But it's the trained man-the man who knows the whys and wherefores of started. I don't believe there Electricity-the Electrical Expert-who is picked out to "boss"the ordinary Electricians is another school in the world boss the Big Jobs jobs like yours. Your lessons are -to -the that pay $3,500 to $10,000 a Year. Get in line for one a real joy to study." of these "Big Jobs." Start by enrolling now for my easily learned, quickly grasped, right. RC BERT JACQUOT, 2005 W. Colorado Ave.dolo. up-to-the-minute, Spare-Time Home -Study Course in Practical Electricity. Colorado Springs, Age or Lack of Experience Get Started Now-Mail Coupon I want to send you my L. L. Cooke, Chief $20 a Day for No Drawback Electrical Book and Engineer You don't have to be a College Man; you don't have Proof Lessons, both Chicago Engineering Schreck to be a High School Graduate. AsChief Engineer of Free. These cost you Works "Use my name as a reference theChicago Engineering Works, I knowexactly nothing and and depend on me as a boost- the you'll enjoy 2150 La Ave.. kind of training you need, and I will give you that them. Make the Dept 21 er. The biggest thing I ever training. My Course in Electricity is simple, start today fora Chicago did was answer your adver- thorough and complete and offers every man, re- a bright future tisement. I am averaging bet- gardless of age, education, or previous experience, the in Electricity. ter than $500 a month from chance to become, in a very short time, an "Electrical Ex- Send in pert," able to make from $70 to $200 a week. Coupon- my own business now. I used NOW. to make $18.00 a week." No Extra Charge for Electrical A. SCHRECK. Phoenix, Arizona Working Outfit With me,you dopractical work-at home. You start Plant Engineer- right in after your first few lessons to work at your profession in the regular way and make extra money in Pay raised 150% your spare time. For this you need tools, and I give them to you -6 big complete working outllts,with tools, measur- "I was a dumbbell in electric- ing instruments, and a real electric motor-6 outfits in all. ity until I got in touch with you Mr. Cooke, but now I Your Satisfaction Guaranteed have charge of a big plant in- So sure am I that you can learn Electricity-so sure am I cluding 600 motors and direct that after studying with me, you, too, can get into the "big money" class in electrical work, that 1 will guarantee un- a force of 34 men-electri- der bond to return every single penny paid me in tuition,if, cians, helpers, etc. My salary when you have finished my Course, you are not satisfied it has gone up more than 150%." was the best investment you ever made. And back of me GEORGE ILLINGWORTH, in my guarantee, stands the Chicago Engineer- 63 Calumet Road, ing Works, Inc.,a two million dollar institution, 4 L. L. COOKE. The Man Holyoke, Mass. thus assuring to every student enrolled, not only Dept. 21 Who Makes a wonderful training in Electricity, but an un- MAIL 2150 Lawrence BigPay" surpassed Student Service as well. Ave., Chicago Men COUPON Send meat once without obligation your big illustrated book and com- FOR MY plete details of your Home Study Course in Electricity, including your FREE outfit and employment service offers. BOOK Name Address Occupation ,,,,w www.americanradiohistory.com e.re,2 r IIIIIIIIIIIÌIIIIIIIIIIIIIIIIIIIIIIIIIIIIILh i p`\\\\ Vol. XIII. January, 1926 Whole No. 153 \ No.9 E111.1111.11111111.1111.111.1=1.111.5 ve .11 iwii,.,.iiiii.i.,i.nuvwmmuu, FORMERLY ELECTRICAL EXPERIMENTER Member Audit Bureau of Circulations ILl EDITORIAL & GENERAL OFFICES: 53 Park Place. New York City GENERAL ADVERTISING DEPT.: 53 Park Place, New York City Published by Experimenter Publishing Company. Inc. (H. Gernsback, Pres.; S. Gernsback, Treas.; R. W. DeMott, Sec'y). Publishers of SCIENCE & INVENTION, RADIO NEWS. THE EXPERIMENTER and MOTOR CAMPER & TOURIST. EDITORIAL STAFF CONTRIBUTING EDITORS Astronomy- Dr. Ernest Bade, Ph.D. HUGO GERNSBACK, Editor-in-CltiCf . Dr. Donald H. Menzel, Ph.D., Ohio Radio- Harris. H. State University. Sylvan WINFIELD SECOR r E. E., Isabel M. Lewis, M.A., of the U. S. Leon L. Adelman. Managing Editor. Naval Observatory. Magic and Psychic Phenomena- Entomology and Allied Subjects- Joseph Dunninger. DR. T. O'CONOR SLOANE, Ph.D., M. A., Dr. Ernest Bade, Ph.D. Joseph F. Rinn. Associate Physics- Edward Merlin. Editor. Dr. Harold F. Richards, Ph.D. Foreign Correspondents- JOSEPH H. KRAUS, Field Editor. Ernest K. Chapin, M. A. Dr. Alfred Gradenwitz, Germany. Dr. Donald H. Menzel, Ph.D., Ohio Dr. H. Becher, Germany. A. P. PECK, Assoc..ssoc. R. E. s State University. C. A. Oldroyd, England. Radio Editor. Automotive Subjects- S. Leonard Bastin, England. Tom C. Plumridge. A. N. Mirzaoff, France. S. GERNSBPCK, Wrinkles Editor. George A. Luers. Hubert Slouka, Czecho-Slovakia. Chemistry- P. C. van Petegem, Holland. M. ESSMAN, Art Director. 9' Raymond B. Wailes. Richard Neumann, Austria. IN OUR NEXT ISSUE 4. Does Tobacco Affect- Contents for January Editorial 793 Odds and Ends of Physics 820 The Health? By Hugo Gernsback. By Dr. T. O'Conor Sloane. An eminent German doctor gives vari- World's Largest Carillon 794 Everyday Chemistry 821 ous pertinent facts By J. Kay London. By Raymond B. Wailes. regarding the action Air Transportation Station of 1950 796 A Model Rotor Ship 822 of tobacco on the wellbeing of the smoker.