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    Features

    The Exportation of American Manufactures

    New Jersey Mines and Minerals

    White Nickel Bronze

    New York Academy of Sciences

    Tornado in Missouri

    The National Academy of Science

    The Edison Lamp Tests

    The Commissionership of Patents

    The Tunnel Under the Hudson River

    Crime in Bengal

    Simple Telephone Transmitter

    By Geo. M. Hopkins

    Improved Knife Handle

    The Great Southern Comet

    What is the Time of Jupiter's Rotation?

    Engineering Invention - May 8, 1880

    New Life Preserver

    New Boiler Cleaner

    Railway Cremation

    Insane Ingenuity

    Sea Beans

    By A. W. Roberts

    Improved Rail

    Miscellaneous Inventions - May 8, 1880

    Mechanical Inventions - May 8, 1880

    Improved Windmill

    Agricultural Inventions - May 8, 1880

    Departments

    • Departments

      New Inventions - May 8, 1880

    • Notes and Queries - May 8, 1880

    • Business and Personal - May 8, 1880

    • Index of Inventions - May 8, 1880

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    May 08, 1880

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