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Scientific American Magazine Vol 81 Issue 24

Scientific American Magazine

Volume 81, Issue 24

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Features

The Secrets of Our Success in the Steel Trade

Airship or Aeroplane--Which

The Dalmeny Experiments

The Danger from the Importation of Animals

The Automobile in Buenos Ayres

Importance of Patents and Trade Marks in Germany

Wireless Telegraphy Tests in Switzerland

End of the Creusot Strike

An X-Ray Delusion

Gustave Michaud

A Safety Switch-Locking Mechanism for Railways

Railway Signals

C. Francis Jenkins

Education by Correspondence

The Submarine Boat and Its Future

Waldon Fawcett

The New French Armor-Clad "Henri Quatre"

The Crime of a Century - December 9, 1899

Chas. Fredk. Holder

Departments

Recently Patented Inventions - December 9, 1899

Index of Inventions - December 9, 1899

Notes and Queries - December 9, 1899

Business and Personal - December 9, 1899

New Books, Etc. - December 9, 1899

Patents - December 9, 1899