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Boffalora-Ticino Hydro-Electric Power Plant

By Alfred Gradenwitz

Digest of the Regulations and Instructions concerning the Denaturation of Alcohol

Special Denaturants

Queer Foods used in Various Countries

Ball and Roller Bearings

By Henry Hess

Resistance of Building Stones to Frost

The Minor Navies of the World

The Fixation of Atmospheric Nitrogen

The Progress and Logical Design of Reinforced Concrete

By Ross F. Tucker

Some Fundamental Characteristics of Mercury Vapor Apparatus

Mercury Vapok Lamp

By Percy H. Thomas

Recent Progress in Metallurgy

By A. E. Outerbridge

Significance of “Throwing the Shoe”

A New Respiratory Apparatus for use in Fires and Mines

By the English Correspondent of Scientific A mem can

The Museum of Accident Prevention

The Bald Eagle of the United States

Engineering Notes

Trade Notes and Formulæ


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