Motion Pictures in Colors
Various Methods by which the Problem has been Attempted
Features
Circumventing Niagara Falls
A New Welland Canal Necessitated by Increasing Traffic
Producing Steel Direct from the Ore
The Cockerill Iron Works
One of the Famous Manufactories of Belgium by our Paris Correspondent
Good Roads and the Government
Marketing our Food Products
Detecting Polarity of Electric Circuits
Training Elephants in the Belgian Congo
Testing High Tension Insulators for Leaks
The Psychanalytic Movement—I
Its Services in the Prevention of Insanity
Why Rivers Overflow
How Floods May Be Prevented
Development of Return-Tubular Boiler Furnace
Dual Aeronautical Motors
Artificial Daylight—I
Light Sources Suitable for Color—Matching
The Safe use of Electricity in Coal Mining
Conditions Under which Explosions of Gases and Dust May Result from Sparks
