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Features

How to Interpret the Facts of Geology

Mount Ætna

Sven Hedin's Exploration in Central Asia

The Erosive Action of the Mississippi

The “Peache” High-Speed Engine at the Glasgow Exhibition

Gold Supply and History

The Liverpool Motor-Vehicle Trials

Machine for Raising Water by the Method of Archimedes' Screw

The Progress of Science

By R. S. Woodward

Experiments with Sound Signals

The Scale Insect and Mite Enemies of Citrus Trees

By C. L. Marlatt

How Arctic Animals Turn White

By R. Lydekker

Development of the Kentucky Asphalt Deposits

Photographic Novelties

Electrically-Operated Pumps

By Frank C. Perkins

Contemporary Electrical Science

Selected Formulæ

Trade Suggestions from United States Consuls

Patents!

Trade Notes and Receipts

Departments

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    Scientific American Supplements Volume 52, Issue 1341supp

    Think Outside the Gift Box