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Features

Radiation Pressure

Its Nature and Significance

By Wilson C. Morris

Sudden Blanching of the Hair

The Origin of Worlds—II

The Evolution of Solar Systems Illustrated by Laboratory Experiments

By Kristian Birkeland

The Production of Caustic Alkali and Bleach

A Review of Recent Developments

By D. J. Allmand

Regulation of the Heat of the Body in Hot Climates

The Development and Status of the Wood Preserving Industry

Notes on the Art as Practiced in America

By E. A. Sterling

Radio-active Manures

The Liquid Air Industry

At First a Curiosity, Now a Commercial Product With Varied Uses

Charles Proteus Steinmetz

One Man's Share in a Few Record Years of Electrical Progress

By Douglas Sutherland Martin

The Shuman-Haines Steam Engine

A Low Pressure Engine Originally Designed for Solar Power

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    July 12, 1913

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