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The Krupp Exhibit at the Duesseldorf Exposition

A New Swiss Hydraulic Plant

Contemporary Electrical Science

A New form of Diaphragm Cell for the Electrolytic Production of Alkalies and Chlorine

By John B. C. Kershaw

A 1,200 Horse Power Gas Engine

The Ondograph

The Rapid ageing and Fireproofing of Wood

Luminous Bacteria

Locomotives fired with Petroleum

The Completion of the Sault Ste. Marie Canal

The Kaiser Wilhelm Monument at Hohensyburg

The Chemistry of Color

Some Interesting Tricks and Experiments Explained

Thermochemistry of Lactic acid

A Critical Review of the High-Speed Electric trains at Zossen

Excavation of the Adena Mound

By William C. Mills

Recent Discoveries in Chinese Turkestan

Selected Formulæ

Trade Suggestions from United States Consuls

Trade Notes and Recipes



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