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Features

Ancient Chaldean Irrigation

Theodor Mommsen

The Salt, Salt Seas

Interesting Discoveries at Oxford

Experiments with a New Type of Compound Locomotive in Italy

The Cost of Mouse-Power

A Woven Cartridge Belt

The Atomic Theory

Single-Phase Motors for Electric Railways

Contemporary Electrical Science

The Agaves—A Remarkable Group of Useful Plants

By E. W. Nelson

Insect Pests of Plants and their Effect on American Agriculture

By F. M. Webster

A Family Group of Hupa Indians

Cave Exploration in California

Governing Gas and Gasoline Engines

By Dugald Clerk

Concerning Coloring, Gilding, Silvering and Oxidizing

The Condor

Electrical Notes

Engineering Notes

Trade Suggestions from United States Consuls

Trade Notes and Recipes

Departments

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    Know Before You Vote

    Know Before You Vote