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Features

A New Field-Piece for the French Army

Black Print Processes

By Albert E. Guy

The Spinning, Stamping, and Working of Aluminum and Brass Sheet

The Chimes of Saint-Germain-L'Auxerrois

The Ziegler-Hager Tacheograph

An Improved Felloe Polishing Machine

How to Read Gages

Pressure Gages—Glass Gages—Ascertain Contents of Tank—How Trouble Was Located

By Alfred Siebert

Living Conditions of the Poor

Electrical Notes

Selected Formulæ

Engineering Notes

An Electric Suspension Railroad

Kangaroo Hunting in Queensland

Color Vision

The Development of Photography in Astronomy

Bamboos

Culture and Preparation of Orris Root

“The Neo-Occultism”

The Dangers of Acetylene

By M. Ad. Bouvier

Inaugural Address by Sir William Crookes, F. R. S., V. P. C. S., President of the British Association

Musical Susceptibility of Animals

By Nicolas Pike

Patents

Departments

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    October 15, 1898

    Think Outside the Gift Box