Electrical Experimenter (07:10) February 1920

This issue of Electrical Experimenter is from February 1920. The cover story is “Suspended Gravitation.” The issue also contains an interview with rocket scientist Robert Goddard, two articles on the Audion tube, how Becquerel discovered radioactivity, vacuum tube circuits, and making fat people thin with electricity.

Contents of this Issue:

• Editorial: The Unknown Senses (H. Gernsback)
• Electrifying The Holy Land
• Sub-Sea Exploration (Joseph H. Kraus)
• The Goddard Moon Rocket (interview with Goddard)
• New Automatic Stereopticon
• Suspending Gravitation: Coming Inventions No. 4 (H. Gernsback)
• At Last! A Dining Car Annunciator
• How Becquerel Discovered Radioactivity (Jean Becquerel)
• The Golden Vapor (E.H. Johnson)
• A Long Distance Dictagraph
• Talking Movies That Talk
• The Versatile Audion (H. Winfield Secor)
• Reversible Airplane Propellers
• Making Fat People Thin By Electricity
• Hitting Invisible Targets
• King of Siam Electrifies His Palace
• Novel Electric Monorail Car
• Had Your Teeth X-Rayed?
• Trolleys We Have Met
• Popular Astronomy: Meteorites (Isabel M. Lewis, M.A.)
• The Giant Canadian Reflector (Prof. Floyd L. Darrow)
• Automobile News
• Perpetual Motion Contest Awards
• The New Theory of Electrical Mass (Rogers D. Rusk, M.A.)
• Experiments in Physics (John J. Furia, A.M.)
• Practical Chemical Experiments (Prof. Floyd L. Darrow)
• The Constructor: Rotary Motor for Model Airplanes (William J. Beach)
• Building a Tangent Galvanometer
• Simple Microphotographic Apparatus
• Electricity from the Thermo Cell
• The Fessenden Oscillator (E.T. Jones)
• Experiments in Thermography (Thomas W. Benson)
• Making an Electrical Swing (Prof. Lindley L. Pyle)
• The Horn Type Sound Locator (Charles K. Fankhauser, Jr.)
• Time Saving Wire Tables
• The Electrical Machinist (H. Winfield Secor)
• How-To-Make-It
• Wrinkles, Recipes, Formulas (S. Gernsback)
• Radio Department: Audions Stronger Than Sun!
• Vacuum Tube Circuits (Pierre H. Boucheron)
• Radio Telephony and the Airplane (William C. Mundt)
• Making a Wave Meter Direct Reading
• A Small Radio Frequency Alternator
• An Improved Loose Coupler (Frank H. Broome, B.S.)
• Getting Together on the Antenna (E.T. Jones)
• What To Invent (Jay G. Hobson)
• Latest Patents
• With the Amateurs
• Science in Slang (Emerson Easterling)
• The Oracle
• Patent Advice (S. Gernsback)
• Opportunity Ad-lets