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Features

Production of Low Temperature and Refrigeration—II

The First International Congress of Refrigerative Industries

By L. Marchis

Mica Production in India

By E. Harran

Motor Truck for Hauling Building Stones

A New French Commercial Automobile

The Reliability of Electric Furnaces

Factors in Their Development Under American Conditions

By F. T. Snyder

Modern Coal Cutting Machinery and Mine Railways

Remarkable Labor-Saving Devices

By Frank C. Perkins

Environment and Heredity

Modern Studies in Experimental Evolution

By D. T. MacDougal

Clamp for washing negatives

By Z. C. Komorowski

Making Money Out of Bees—II

Keeping Bees for Pleasure and Profit

By E. F. Phillips

A Variable-Speed Carbureter

By the Paris Correspondent of the Scientific American

Index of Inventions

The Relation of Light to the Production of Sugar in Beets

patents

Departments

  • Art and the Engineer

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February 25, 1911

Think Outside the Gift Box