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The Successful Defender of the International Motor Boat Cup

The Zeppelin Airship Disaster

A Cruiser-Battleship Holds the Transatlantic Record

May a Manufacturer Buy a Patent, Never Use It, and Sue for Infringement?


By J. F. Springer

The Current Supplement

Military Ballooning in Japan

A Municipal “Microbe Farm.”

By Harold J. Shepstone

The Evolution of the Blow

By Percy Collins

The Mechanical Joys of Coney Island

A No-Segment Graphite-Resistance Controller

The International Motor Boat Race for the Harmsworth Trophy


  • Departments


  • Notes and Queries

  • Recently Patented Inventions

  • New Books, Etc.

  • Index of Inventions

  • Patents

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