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Practice and Theory of Aviation.—VI

The Leading Aeroplanes

By Grover Cleveland Loening

Briquetting of Iron Ores

Wireless Telegraphy and Telephony

A Review of Ethereal Signaling Methods

By Cornelius D. Ehret

Aeroplanes in Paris.—II

The French Salon

Gas Engine Temperatures

How to Repair and Clean Typewriters

A Secret Process Revealed

In the Heart of Africa.—I

The Expedition of the American Museum of Natural History

By Mary Cynthia Dicrerson

Manila Copal

Dew Ponds

The Geology of Canada

The Planet Saturn

A Few Facts about a Remarkable Body. Illustrated with Yerkxs Observatory Drawings

By W. F. Denning

Modern Rotary Steam Engines

Some New Forms of Prime Movers

By Warren O. Rogers

The Gabet Torpedo

Controlling a Torpedo by Wireless Energy

By Lucien Fournier

Trade Notes and Formulæ

Electrical Notes


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