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Features

Gums, Resins, and their Properties

A few Technical Suggestions

The Preparation of Gold Trichloride for Photographic Purposes

By Randolph Bolling

Governing Device for Internal Combustion Engines

The Coal-Tar Industry

Services Rendered by Chemists in its Development

By H. A. Metz

Steel Making by Electricity

A Review of Modern Processes

Amount of air Needed for Ventilation

A Few Practical Hints

By F. H. Bryant

Sand Waves and their Work

The Ravage Wrought in the Desert

By Day Allen Willey

The Earth a Failing Structure

By John F. Hayford

Electric Culture of Plants

The Sampson Gas-Electric Road Train

A Novelty in Transportation Engineering

By Harry W. Perry

The Albuquerque Geological Meeting

A Resume of the Proceedings

By Edmund Otis Hovey

Astronomy with a Three-Inch Telescope

What Can be Done with a Small Instrument

By Wendel L. Paul

Engineering Notes

Science Notes

Trade Notes and formulæ

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    February 22, 1908

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