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Headworks of the New Mandalay Canal

Methods of Estimating Population

Textile Industries of Germany

The Scientific Study of Accidents

Bicycle Brakes

An Ingenious Lock Nut

Plate-Bending Rolls

The Sanitary Condition of Street Cars in New York

By George A. Soper

Primitive Chronology

The New German Cruiser “Prinz Heinrich.”

Paints without Oil

Portable Electric Station

Studebaker wide Spraying Electric Car

Electric Furnaces

By Bertram Blount

The Manufacture of Artificial Limbs

Trade Suggestions from United States Consuls


Selected Formulæ


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