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Shamrock IV in Drydock, A Water Model of the Electric Arc, and more

Her Form Shows That the Challenger Will be Formidable in Fresh to Strong Breezes.

X-Rays in the Treatment of Disease

The Rationale of Their Application

The Rodman Wanamaker Transatlantic Flier

Its Successful Trials on Lake Keuka

The Austrian Aircraft Disaster, Ulivi's Experiments in Exploding Bombs with Infra-red Rays, and more

By Carl Dienstbach

An Underwater Siren to Prevent Collisions at Sea

Prof. R. A. Fessenden's Latest Invention

By P. Harvey Middleton

The Manufacture and Fitting of Piston Rings

How the Efficiency of a Motorcar is Dependent Upon Gas-tight Ring-joints

By H. S. Whiting

Neglect of the Human Machine

By Eugene Lyman Fisk


  • Letters

    Correspondence- July 4, 1914

  • Recommended

    New Books, Etc.- July 4, 1914

  • Departments

    The Heavens in July 07, 1914

  • Inventions New and Interesting- July 4, 1914

  • Recently Patented Inventions- July 4, 1914

  • Notes and Queries- July 4, 1914

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