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Features

Announcement, Bending Strength of ZR-2 and more

The Geologist's Part in Road Building

How Wisconsin's Highways are located with Expert Scientific Advice

By George H. Dacy

Water Level and Weather Observation Station at the Salton Sea

By John Edwin Hogg

Developing Motion Picture Film with Automatic Machinery

By Harry A. Mount

The All-Around Vegetable

The Many Uses of the Sweet Potato, and How to Make the Most of Them

By S. R. Winters

The Economic Aspects of Mobilization

What it Means to a Modern Nation to Put an Army in the Field

By Jennings C. Wise

Rapid Transit Arithmetic

The Principle of the Economic Unit Applied to Large Cities Utilities

By John Lathrop

From Star to Chronometer via Radio

The Function and the Manner of Transmission of the Modern Time Signal

By C. H. Claudy

Using Cadmium to Galvanize Iron

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    Correspondence

  • The Service of the Chemist

  • Inventions New and Interesting

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September 1921

Think Outside the Gift Box