This is the January 1920 issue of Electrical Experimenter. The cover story is “First Wingless Airplane,” introducing the helicopter. Another article features a model helicopter design. Other articles include whether an electric airplane is feasible, learning telegraphy at school, the radio compass, and Einstein’s theory of relativity.
Contents of this Issue:
- Editorial: A Celestial Short-Circuit (H. Gernsback)
- Vertical Lighthouse Beams
- The “Helicopter,” A Vertical Airplane (Robert G. Skerrett)
- Is the Electric Airplane Possible?
- What Atomic Forces Could Do
- Electric Locos Cross Mountains
- Magnetic Storms (Lindley Pyle)
- Swimming Pool Purified by Electric Rays (Joseph H. Kraus)
- The World’s Largest Theater
- The Locomotive Periscope: Next! (George Wall)
- Abolishing Smoke Electrically
- The Electrical Engineer at Work (H. Winfield Secor)
- Learning Telegraphy and Radio at School
- A Model Helicopter (William John Beach)
- Science in Latest Movies
- Astern! With Engine Running Ahead! (Charles M. Ripley)
- Popular Astronomy: The Einstein Theory of Relativity (Isabel M. Lewis)
- The Mt. Wilson 100-Inch Reflecting Telescope (Floyd L. Darrow)
- The First Automatic Telephone
- Recording Daylight
- The Structure of Electricity (Dr. Alfred Gradenwitz)
- Is There a Sub-Electron? (Rogers D. Rusk)
- Automobile News
- The Amateur Magician (Joseph H. Kraus)
- Practical Chemical Experiments (Albert W. Wilsdon)
- The Constructor: Home-Made Arc Searchlight (Frank Calvert, Jr.)
- A Small Rectifier for Charging Storage Batteries (Elliott A. White)
- Calibrating Electrical Measuring Instruments (Thomas W. Benson)
- Instrument for Measuring Radio-Activity (Ivan Crawford)
- Selective Switch for Three or More Interphones
- The Electrical Machinist: No. 3–Motor Journals and Bearings (H. Winfield Secor)
- How-To-Make-It
- Wrinkles, Recipes, Formulas (S. Gernsback)
- Radio Department: The Radio Compass (Pierre H. Boucheron)
- An Oscillion Radio Telephone and Telegraph
- New Undamped Radio Receiver
- Radio Fog Signaling A Success
- New 165 Ft. Portable Radio Mast
- Latest Patents
- With the Amateurs
- Science in Slang (Emerson Easterling)
- The Oracle
- Patent Advice (H. Gernsback)
- Opportunity Ad-Lets
Publisher: Experimenter Publishing Company, Inc.
Editor: Hugo Gernsback
Issue: Volume 7: Number 9; Whole No. 81; January 1920
Pages: 120
Size: 9″ x 12″
Digital edition © 2011 Curtis Philips. All Rights Reserved.