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Antarctic Exploration

By Edwin Swift Balch


By E. C. Rost

Water in Australia

A New Census Machine

Electrolytic Reduction of Lead

Electricity in its Application to Submarine Mines

By John Stephen Sewell

Vertical Direct and Alternating Generators

By Frank C. Perkins

Blue Print and Black-Print Photographic Papers, and their Preparation

By Alfred I. Cohn

New Filter Plant at Middletown, N. Y

The Inventor of Dover's Powder

Light and Malaria

The Gulf Stream Myth

Recent Progress in American Bridge Construction

By Henry S. Jacoby

Bell Founding

A Remarkable Psychic Contrast from the Life-History of Ants

By Herman J. Muckermann

Economic uses for Shells

The Giant Wild Sheep in the Zoological Garden at Berlin

India Ink—How it is Made

Recovered Rubber

Exalbuminous Fruit of Melocanna

Trade Suggestions from United States Consuls


Selected Formulæ


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    July 19, 1902