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Features

The Technical History of the Airplane

How the Various Elements of the Airplane have been Gradually Developed

By F. M. Green

Mosquitoes and Swamp Fever at Paris

Drying Vegetables a New Conservation Move

The Process Greatly Extends the Farmers Market

By Arthur L. Dahl

Treatment of War Wounds

Are Concrete Ships Desirable

Our Sun and other Sky-Furnaces

By Charles Never Holmes

Modern Margarine Technology

An Outline of Its History and Manufacture

By W. Clayton

Indian Sumach

The Evolution of Time-Marking Devices

Some Simple Devices that Served Our Ancestors

By Percy Collins

Photographic Printing Method

Is the Sun Due to Explode?

Deglet-Knour

Fruit of The Desert

The Divining Rod-II

A History of Water Witching

By Arthur J. Ellis

A Method of Observation and Measurement of Rapid Periodic Magnetic Phenomena

Insects that Eat Tobacco

The Development by X-Rays of Two New Fields

How the Radiographer has been Able to throw Light in Unexpected Places

By L. E. Dodd

Inducing Rain by Electricity

Platinum in the Ural Region

Departments

  • Departments

    Gas Warfare, The Current Supplement, and more

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Know Before You Vote

Know Before You Vote