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Features

The Chemical Industries of Germany—II

An Historical Review of Processes and Conditions

By Percy F. Frankland

Purchasing Coal on Heat Unit Basis

Forging Shrapnel Shells

Some Details of Modern Methods Now in Use

By Douglas T. Hamilton

Plating by Impact

Death of Pierre-Emile Martin

The Largest American Gas Engine

Light-Stroke

The Art of Mobile Color

And a Discussion of the Relation of Color to Sound

By M. Luckiesh

Radium Treatment of Cancer

Floor Surfaces in Fireproof Buildings

Recommendations in Regard to Material and Methods of Construction

By Sanford E. Thompson

High-Speed Engines

Railway Rail Production and Failures

Automobile Lubrication—II

How to Test, and How to Use Various Classes of Oils and Greases

By C. W. Stratford

Measuring Growth of a State

First Enumeration Solely to Provide for Political Reapportionment

Porous Boiler Settings

Departments

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June 26, 1915

Think Outside the Gift Box