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The Fortifications of Manila

A New Theory of Geysers

Kites: Their Theory and Practice

By B. F. S. Baden-Powell

The Chinese Repeating Bowgun

Direction for Working Aluminum

Presses for Baling Cotton

A New Style of Bicycle Pedal

Triple-Geared Sliding, Surfacing and Screw-Cutting Lathe

An Electrical Bureau

Liquid Air as an Analytic Agent

History of the Stone Arch

By Malverd A. Howe

Navy Full Diet Table

Chemistry of Plant Colors

Electrical Notes

Engineering Notes

Selected Formulæ

Five Early Astronomers

The Present Appearance of Jupiter

American Competition with France in Agricultural Products

A Governmental Department of Science

By J.H. Gore

The Laughing Plant of Arabia



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