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SA Supplements Vol 52 Issue 1341supp

SA Supplements

Volume 52, Issue 1341supp

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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

The Liverpool Motor-Vehicle Trials

Machine for Raising Water by the Method of Archimedes' Screw

Gold Supply and History

The Progress of Science

R. S. Woodward

Experiments with Sound Signals

The Scale Insect and Mite Enemies of Citrus Trees

C. L. Marlatt

How Arctic Animals Turn White

R. Lydekker

Photographic Novelties

Development of the Kentucky Asphalt Deposits

Electrically-Operated Pumps

Frank C. Perkins

Contemporary Electrical Science

Selected Formulæ

Trade Suggestions from United States Consuls

Patents!

Trade Notes and Receipts