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Features

The Tin-Mining Industry of Cornwall

By the English Correspondent of Scientific American

International Commerce of the World and Share of the United States Therein

The use of Alcohol and Gasoline in Farm Engines

Elementary Engine Mechanism

By C. E. Lucke and S. M. Woodward

Hardening Steel by Electricity

Petroleum and its Refinement

By Charles E. Munroe

Electric Effects Produced by Light

Illumination as Affecting the Eye

By Wendell Reber

The World's Greatest Gambling House—Lloyd's

Photographing Lightning with a Moving Camera

By Alex Larsen

A New Galvanoplastic Process

By A. Breydell

The Theory of Mountain making

Engineering Notes

Science Notes

Trade Notes and Formulæ

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