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Features

Advantages of Gas and Oil Engines for Marine Propulsion

By John E. Thornycroft

Typical Automatic Weighing Machines

By Emile Guarini

Early Railway Traction

A Novel Four-Piece Mechanism

By the English Correspondent of the Scientific American

The Telefunken Ondometer for the Measurement of Wireless Telegraphy Waves

By Our Brussels Correspondent

Two Early American Letters on Electricity

The Influence of Pasteur on Medical Science

By C. A. Herter

Reducing the Candle-Power of Gas

Preliminary Report on an Archeological Trip to the West Indies

Stone Amulets

By Walrter Fewkes

Science Notes

Trade Notes and Recipes

Trade Suggestions from United States Consuls

Beating Gold Leaf

Lace Industry of France

Patents!

Selected Formula

The Scientific American Supplement. Index for Vol.57

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June 25, 1904

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