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Features

Illegal Mining and Bomb-dropping, An Internationalized Science, and more

Mines in International Waters and Dropping Bombs on Civilians

The Tunkhannock Railway Viaduct

Construction of the Largest Concrete Arch Bridge in the World

How Great Britain Trains her Military Aviators

The Central Flying School

By H. Bannerman-Phillips

An Automobile Radio-Telegraph Station for War Use

Wireless Car for the French Army Equipped with Powerful Field Apparatus

By Jacques Boyer

Time as a Factor in Baseball

What Must be Done in a Fraction of a Second

By C. H. Claudy

The Micro-structure of Steel, The Dewey Decimal System for Filing Pamphlets, Clippings and Books

By J. F. Springer

The Smallest Public Service Plant in the Country, Electric Speed Indicator for Locomotives

By George Frederic Stratton

Rubber Foam, Three-letter Linotype Matrix, and more

By Paul James

Departments

  • Notes for Inventors

  • Switzerland Asks for Help

  • Recommended

    New Books, Etc.- September 19, 1914

  • Departments

    Recently Patented Inventions- September 19, 1914

  • Notes and Queries- September 19, 1914

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September 19, 1914Cover Image: Two Airships over Cologne Cathedral

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