Traveling Greenhouses

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

A New Theory of Sunspots

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

A Wonderful Model of a Copper Mine

The Water-drop as a Microscope

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

Fighting Dust with Dust

Powered Stone to Prevent Coal Mine Explosions

Curiosities of Science and Invention

Commissioner Ewing and the Patent Office Building

The Electrolysis of an Egg

Motion Pictures of Vocal Chords