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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.