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Features

Compromise, with a Big Stick, Shipping Troubles and more

Canada's Great Ship Canal

The Present Status and the Ultimate Plans of the Welland Improvement

By J. F. Springer

Improvements in Train Braking

A Combination of Straight and Automatic Air That Gives Remarkable Brake Control on Steep Grades

How the Lower Animals See

Old and New Ideas on the Function and Operating Details of Insect Eyes

By William Crowder

Tricks of Traffic Control

Some of the Ingenious Devices and Interesting Methods Employed at America's Busy Corners

Racing with Model Yachts

By William Henry

The Up-to-the-Minute Laundry

By Charles W. Geiger

Concerning Ice

High Pressure Experiments on Water Carried on by Dr. Bridgman of Harvard

By Bridgman Harvard

With the Engineers of Industry

A Department Devoted to the Physical Problems of the Plant Executive

Attention to Details Essential to Efficiency

Departments

  • Departments

    Correspondence

  • Inventions New and Interesting

  • Recently Patented Inventions

  • Index

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June 1921

See the World from a Different Perspective

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