The Electrical Experimenter 1920-04 Vol 7 No 12 #84: Watching Plants Grow

April 1920 issue of Electrical Experimenter, Vol. 7, No. 12, Whole No. 84. The cover story is "Watching Plants Grow."

Main Contents of this Issue:

Editorial: The Earth's Interior Molten? (Hugo Gernsback)
Electric Power From The Sun
The Battle Tracer
Heat of Body Detected 600 Feet Away
One-Man Subway Train
Watching Plants Grow
Hello Mars! (H. Winfield Secor)
Electricity Foils German Seals (Fred C. Kelly)
The Physiophone: Music for the Deaf (H. Gernsback)
Electro-Medical Frauds (Joseph H. Kraus)
"The Educated Harpoon" (Charles S. Wolfe)
Electric Bachelor Maid
Telegraph, Cable and Radio Dispatches (Pierre H. Boucheron)
Weighing the Earth (Louis Derr)
Electrifying Canal Boats and Barges (Robert G. Skerrett)
Talking Over a Sunbeam (Prof. A.O. Rankine)
Sawing Ice By "Motor"
This Fire Alarm "Talks"
Automobile News
Popular Astronomy: Observing The Heavenly Bodies (Isabel M. Lewis, M.A.)
Sir Ernest Rutherford, On The Problems of Radioactivity
"Rabbit Contest" Awards
Practical Chemistry Experiments (Prof. Floyd L. Darrow)
The Constructor: Home-made 110-Volt, 60-Cycle Induction Motor (H.H. Parker)
Home-made A.C. Motor
The "Finer Workings" of Static Electricity - 2nd Paper (Frederick von Lichtenow)
Electro-Monogram Sign for the Boys
Measuring Electric Currents With the Eye (C.A. Briggs)
Storage Battery Repairing (Henry Klaus)
The Electrical Machinist (H. Winfield Secor)
How-To-Make-It
Wrinkles, Recipes, Formulas (S. Gernsback)
Radio Department: Some Long Distance Radio Telephone Tests (Robert F. Gowen)
Music 400 Miles by Radio
"Direct Current" Transmitter
Audions on Alternating Current Again!
Latest Radio News
New Amateur Wireless Transmitting Set
Selective Wireless Control (Everett Leo Deeter)
War Versus Pre-War Apparatus ("Sparks")
What To Invent (Jay G. Hobson)
Latest Patents
With the Amateurs
Science With A Bang (Everson Westerling)
The Oracle
Opportunity Ad-lets

Original Publisher: Experimenter Publishing Company, Inc., 1920
Editor: Hugo Gernsback
Size: 8.25" x 11.5"
Issue: Volume 7: Number 12; Whole No. 84; April 1920
Pages: 124