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    Features

    Salt-Water Mains for Fire Protection

    Future Extension of the Subway System

    A Floral Map of the United States at the St. Louis Exposition

    Borings on a Coral Reef

    The United States in 1903

    Concrete Piling

    A New System of Rapid Telegraphy

    A Single-Cylinder, Reversible, Four-Cycle Gasoline Engine

    A New Gasoline Motor for Airships

    The New Vickers-Maxim 9.2-Inch Wire-Wound Gun

    The Abruzzi Polar Expedition.—I

    The Hudson River Tunnel

    Harrow Tooth and Simple Fastening Device

    Combination Lock for Umbrellas

    Valve Mechanism for Locomotives

    Patent Department

    Improved Windmill

    Bending Device

    Ore-Sampling Machine

    Mail Box for Rural Free Delivery Routes

    Business and Personal Wants - March 26, 1904

    READ THIS COLUMN CAREFULLY……..

    Departments

    • Departments

      Science Notes - March 26, 1904

    • Correspondence - March 26, 1904

    • Notes and Queries - March 26, 1904

    • Recently Patented Inventions - March 26, 1904

    • Index of Inventions - March 26, 1904

    • New Books, Etc. - March 26, 1904

    • Patents - March 26, 1904

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    March 26, 1904