The Electrical Industry in America
A Review and a Forecast
Features
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