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Features

The Biological Aspects of Warfare—I

Instincts and Restraints that Affect Human Relations

By Harry Campbell

Color of Pure Copper

Zinc Alloys

The Value of Ignorance

The Nature of Sun-Spots

And Studies of Their Life History

By A. L. Cortie

Preserving Potatoes by Lime

The Storing of Coal

Synthetic Rubber

Scent-Producing Organ of the Honey-Bee

Decolorizing of Anti-Halo Plates

Whale Beef and Whales

By Edward T. Martin

New Feeding Stuffs used in Germany during the War

The Fur Trade of the United States

America Now the Chief Trading Center of the World

Controlling Dry Rot in Timber

Tempering Copper

National Fuel Research

A Zeppelin Surprise

By Jhadoo Jahaz

Temperature of Liquid Steel

Future Trans-Sahara Route

Absorption of Ultra-Violet Rays

Some Factors in Illuminating Engineering

The Production of Visual Sensations

By F. K. Richtmyer

Flow of Water through Submerged Pipes

Vaccination for Tetanos

The Experiences of an Iron Atom—II

The Cycle of Its Life History

By Charles R. Sturdevant

The Relation between Pressure-Gradient, Wind, and Friction in Steady Motion

The Virial Hypothesis and the Theory of the Brownian Movement

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    January 12, 1918

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