SA Supplements Vol 65 Issue 1678supp

SA Supplements

Volume 65, Issue 1678supp

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Features

The Opening of the Hudson River Tunnels

The Completion of a Gigantic Task

Heavy Gold Deposits and a Good them Solution for Producing Them

Solution for Producing

Wilhelm Ostwald

A Sketch of a Great Chemist's Career

Flash-Light Powder for Photographers

Plant Physiotherapeutics

The Medicinal Activities in Vegetable Matters

W. E. Everette

The Plagues of History

Their Periodic Quiescence and Recrudescence

Heusler Magnetic Alloys

Vibration in Steamships

Elements of Electrical Engineering.—XII

Conjoint Operation of Dynamos

A. E. Watson

Leather Varnishes

What Is Matter

The Investigations of Modern Physicists

L. E. Mezgs

Atmospheric Nitrogen

Its Fixation by Plants

W. J. Uglow Woolcock

The Ascent of Sap in Plants

Otto N. Witt

Trade Notes and Formulæ

Engineering Notes