Volume 79, Issue 2050supp
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Features
Gasoline Locomotives
Effect of Moisture in the Earth on Temperature of Underground Cables
Testing the Sensibility of Plants
What Happens when Gunpowder Explodes
Electrolytic Iron Melted in Vacuo
Printing for the Blind
The Gatun Dam
The Roosevelt-Rondon Scientific Expedition—I
Its Movements in South America and Some of its Zoological Achievements
Progress in Aeronautics
A Review of Recent Air-raids and what they have Accomplished
Equilibrium of the Body
Wireless Transmission of Energy—l
An Explanation of its General Nature and Relationship to Transmission by Wire
German Railways and the War
The Schumann Region of the Spectrum
The Thomas Military Tractor Biplane
The Uses of Light in the Treatment of Disease
Its Value as an Efficient Remedy when Properly Employed