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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

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