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    Features

    Hardening Composite Plates for Bank Vaults

    Education in America

    An American Bullet Proof Shield

    The Great Railroad Strike

    Failure of a Large Armor Plate

    Brooklyn Meeting of the A. A. A. S

    Laying an Atlantic Cable in Twelve Days

    An Improved Tellurian

    Electric Light Engines, Manchester Corporation

    A New Telephone

    Viaduct for Street Railways, Cincinnati

    A Steam Ice Cream Manufactory

    Roaring Alligators in the Zoological Gardens at Hamburg

    The Albatross

    Departments

    • Letters

      Correspondence - July 21, 1894

    • Recommended

      New Books and Publications - July 21, 1894

    • Departments

      Recently Patented Inventions - July 21, 1894

    • Business and Personal - July 21, 1894

    • To Inventors - July 21, 1894

    • Index of Inventions - July 21, 1894

    • Notes and Queries - July 21, 1894

    • Patents - July 21, 1894

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    July 21, 1894

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