Volume 110, Issue 14
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Features
Traveling Greenhouses
The Redemption of Mesopotamia, New York's Sewage Problem, Solar Radiation Measurements at Great Altitudes, and more
A New Theory of Sunspots
First Magnitude Stars
The Problem of Our Navy—April 4, 1914
VI.—Our Shortage of Scouts, Torpedoes and Mines
Gravitation and the End of the World
A Vindication of Adjustable Wings, Wireless in the Antarctic
How the Scientists are Studying the Aeroplane
Institutes of Aerial Engineering and Their Work
The Most Powerful Government Wireless Plant
The United States Naval Station at Radio, Virginia
Attractions of Variable-star Observing
The Water-drop as a Microscope
A Wonderful Model of a Copper Mine
Finishing the Work at Panama, A New Method of Sterilizing Milk
Fighting Dust with Dust
Powered Stone to Prevent Coal Mine Explosions