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    Features

    Opportunities for Invention

    Recent Armor Plate Trials

    A Convenient Ribbon Holder

    Experiments with Soap Bubbles

    An Improved Window Screen

    Old Clocks

    Lighthouses, Lightships, and Buoys

    Manufacture of Felt Hats

    The Columbia

    The Otocyon

    Departments

    • Letters

      Correspondence- September 10, 1892

    • Departments

      Notes & Queries- September 10, 1892

    • Business and Personal- September 10, 1892

    • Recently Patented Inventions- September 10, 1892

    • To Inventors- September 10, 1892

    • Index of Inventions- September 10, 1892

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    September 10, 1892

    Reanimate Your Brain

    31% Off for Halloween

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