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Recent Exploration in Peru

By Enos Brown

Lodgepole Pine

Receptacles of Quartz and their uses in Chemistry

By M. Berthelot

Our Sun and “Weather.”—II

By William J. S. Lockyer

Luminous Organs of Deep-Sea Fishes

The Nationality of Fishes

By F. G. Aflalo

Variable Stars

By Alexander W. Roberts

The Plant of the New Electric Railroad up Mount Vesuvius

By the English Correspondent of the Scientific American

Growth of the use of Incandescent Gas

Turkish Preparations from Grape Juice

The Man and the Ship

By George W. Dickie

Workingmen's Insurance in Germany

The Westinghouse Direct-Current Integrating Wattmeter

A New Automatic Match-Making Machine

Recent Gas and Oil Engine Developments

By Thomas Holgate

Contemporary Electrical Science

Engineering Notes

Science Notes

Electrical Notes

Trade Notes and Recipes

Patents!

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    May 13, 1905

    Complex Causes. Alternative Solutions.