The Electrical Industry in America

A Review and a Forecast

New Composition Opaque to X-Rays

Lead Azide—A Powerful Explosive

War Service Schools at Educational Institutions

Chemical and Mechanical-Technical Examination of Rubber

South American Frogs

Sources of Platinum

A Steel Ship Built without Rivets

Thermostats

Recent Observations on the Solar Coronas

Making and Destroying Paper Money

How the Bureau of Engraving and Printing and the Redemption Division Work

Liquid Ostrich Eggs

A Serious Wheat Disease Discovered in the East

War Coins, of the Central Powers

Methods for the Production of Pure Cocoanut Oil

Liquid Films

The Commencement of the Astronomical Day

Note on the Testing of Magneto Magnets

Brush-Making Fibers

The Southern Cross

Use of Crude Napthalene as Fuel for Internal Combustion Engines

A Review of Mycology—I

Questions of Biology that Still Demand Study