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The Land of the Boers

A Problem in American Anthropology

Recent Work against the Gypsy Moth

Single China Aster (Callistephus Hortensis)

Selected Formulæ

Miscellaneous Notes

Cotton Industry

Trade Suggestions from United States Consuls

Experiments with High - Frequency Currents at the Charlottenburg Technical School

Facts about Storage Batteries

By Isaiah L. Roberts

Electric Propulsion at Tours

Mechanical Science

The Parsons Turbomotor

By William White

The Mining and Preparation of Kaolin

A Novel Fire Escape

Schneider-Canet Naval Turrets

Australian Quicksilver

Report of the Chief of the Bureau of Ordnance

American Railroads

Their Relation to Commercial, Industrial and Agricultural Interests

Compound Harmoni Vibration of a String


The Manufacture of Sodium Nitrite


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