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    A Quarantine Fleet for the Mississippi

    Increase in the Rubber Manufacture

    Government Use of Patents

    American Industries-Our Illustrated Series

    A Patent Case of General Interest

    The Boss Puzzle Abroad

    Series Forty-Nine

    Disastrous Steamboat Accident

    Burning of Oil Tanks by Lightning

    American Industries.--No. 49

    A Novel Wheelbarrow

    Improved Street Lamp

    Engineering Inventions

    Automatic Safety Cylinder Cock

    Improved Cartridge

    Repairing Spiral Springs

    By E. N. Maxwell

    New Ore Separator

    Electro-Thermic Telephone

    New Telephone Experiments

    Miscellaneous Inventions

    Novel Gate Closer

    New Car Mover

    Fish Parasites

    By A. W. Roberts

    The Terebella and Hermella

    The Structure of Matter

    Communications Received

    Departments

    • Departments

      Correspondence

    • Business and Personal - July 17, 1880

    • Notes and Queries - July 17, 1880

    • Index of Inventions - July 17, 1880

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    July 17, 1880

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