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Traveling Greenhouses

By S. Leonard Bastin

Softening Souple Silk, One Of The Largest Forest Nurseries

The Redemption of Mesopotamia, New York's Sewage Problem, Solar Radiation Measurements at Great Altitudes, and more

First Magnitude Stars

By Frederic Campbell

A New Theory of Sunspots

By E. A. Fath

The Problem of Our Navy—April 4, 1914

VI.—Our Shortage of Scouts, Torpedoes and Mines

Gravitation and the End of the World

By John W. N. Sullivan

A Vindication of Adjustable Wings, Wireless in the Antarctic

By Carl Dienstbach

How the Scientists are Studying the Aeroplane

Institutes of Aerial Engineering and Their Work

By Paul Béjeuhr

The Most Powerful Government Wireless Plant

The United States Naval Station at Radio, Virginia

By John L. Hogan Jr.

Attractions of Variable-star Observing

By Edward Gray

A Wonderful Model of a Copper Mine

By J. W. Grigg

The Water-drop as a Microscope

By James Bailey

Finishing the Work at Panama, A New Method of Sterilizing Milk

Fighting Dust with Dust

Powered Stone to Prevent Coal Mine Explosions

By John B. C. Kershaw

Curiosities of Science and Invention

Commissioner Ewing and the Patent Office Building

The Electrolysis of an Egg

By Albert A. Somerville

Motion Pictures of Vocal Chords

By Jacques Boyer


  • Letters

    Correspondence-April 4, 1914

  • Departments

    Recently Patented Inventions-April 4, 1914

  • Notes and Queries-April 4, 1914

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