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Electrical Experimenter (07:05) September 1919

Hugo Gernsback, editor

"Since it can be shown that the velocity of escape varies directly as the square root of the mass of the attracting body, it is possible to compute the velocity of escape for objects on all of the planets in the solar system. It would be easy to fire a cannon ball from Ceres, the largest asteroid, that would pass off into space, never touching the surface of the asteroid, while on Eros, the small asteroid, a stone could be thrown from the hand with sufficient velocity to enable it to escape the control of the asteroid."
This is the September 1919 issue of Electrical Experimenter. The cover art is “You Too Can Do This On ‘Eros'” and the inside feature story is about various phenomena of gravity. Additional articles discuss psychic research, telegraphing images, constructing vacuum tubes, and De Forest defending his 3-element Audion tube.
Contents of this Issue:
  • Editorial: Hail (H. Gernsback)
  • Silhouette Movies (H. Gumpel)
  • An Electric Sign in Mid-Air
  • Speeding Up the Airship (H. Gernsback)
  • Popular Astronomy: Interesting Phenomena of Gravitation (Isabel M. Lewis)
  • World’s Biggest Turbine-Dynamo–100,000 H.P. (William H. Easton)
  • How the R-34 Crost the Atlantic
  • Under-Water Surveying by Reflected Sound Waves (H. Winfield Secor)
  • A Telltale Submarine Net
  • Sir William Crookes’ Psychical Researches (Hereward Carrington)
  • Telephone Solves “Lower Berth” Squabble
  • New Continuous Panorama Advertising Display
  • 200,000 Horse-power in One Hour
  • Possibilities of High Frequency Currents (John Pritchard)
  • Newest Electrical Devices
  • Electric Cookery–A Snap! (Grace T. Hadley)
  • New Things Electrical
  • Recording Your Chauffeur’s Joy Rides (Thomas Reed)
  • Try These on Your Auto
  • The Mystery of Atmospheric Electricity (Rogers D. Rusk)
  • Experiments in Physics: 2–Illusions (John J. Furia)
  • Practical Chemical Experiments: Cleaning and Washing Agents Part II (Albert W. Wilsdon)
  • The Constructor: Thermo-Electricity Experiments (Thomas W. Benson)
  • A “Selective” Electrolier Switch (Albert H. Beiler)
  • Making a Machine for Telegraphing Pictures, Part 1 (LeRoy J. Leishman)
  • Home-Made Compound Microscope (Carl F. Muckenhoupt)
  • Experimental Mechanics, Lesson XIV: Reamers Continued (Samuel D. Cohen)
  • How-To-Make-It
  • Wrinkles, Recipes, Formulas (S. Gernsback)
  • Radio Department: The “Fog Warning” Radio Telephone
  • New 1 K.W. Quenched Gap Transmitter (Lester F. Ryan)
  • Valves
  • De Forest Defends His 3-Element Audion
  • Vacuum Valve Construction (R.H. Shaw)
  • The How and Why of Radio Apparatus No. 12, Radio Antenna Construction (H. Winfield Secor)
  • Eccentric Antennae (Eugene Dynner)
  • Latest Patents
  • With the Amateurs
  • Science in Slang (Emerson Easterling)
  • The Oracle
  • Patent Advice (H. Gernsback): Developing an Idea (Nelson Hall)
  • Opportunity Ad-lets

Experimenter Publishing Company, Inc.
Editor: Hugo Gernsback
Issue: Volume 7: Number 5; Whole No. 77; September 1919
Pages: 104
Size: 9″ x 12″
Digital edition © 2010 Curtis Philips. All Rights Reserved.

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