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Features

The Metabolism of Insects—I

Successive Changes Undergone During their Post-Embryonic Lives

By August Lameere

Aerial Propulsion of Boats

Literacy in China

Magic Pictures

A Novel Diversion for Young People

By S. Leonard Bastin

New Telephone Sound Augmenter

Towing at Sea

Natural History of the Eel

Meteorites: Wonderful Messages from the Sky

The Decay of Metals

Certain Changes in Character that are Liable to Occur

By Cecil H. Desch

Animal Ecology

By Rail to Ceylon

The Big Guns in the War

The New Artillery now Being used by the Allies

Imperial Trains of Europe

By Walter S. Hiatt

Internal Combustion Engine Cycles—II

Possibilities of the Constant Pressure Cycle

By Arthur B. Browne and Herbert Chase

News by Wireless

The Truth about Colored Rubber

How Color is Obtained and Why it is Unrelated to Quality

By Webster Norris

Modern Methods in Surveying

The Pallograph

An Ingenious Instrument for Recording Vibrations

Unstable States in Arc and Glow

The Diverse Ways in which the Instability Asserts Itself

By W. G. Cady

The History of the Safety Lamp

The Result of One Hundred Years of Effort

By F. W. Hardwick and L. T. O*amp*apos;Shea

Complete Photo-Electric Emission

Cows', Goats' and Human Milk

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    September 16, 1916

    Think Outside the Gift Box