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Features

Christopher Columbus

The Approaching Expiration of the Bell Telephone Patent

Copying Camera Holder

An Improved Hanger

Hamilton's Ventilating Blower

The Utilization of Water Power

An Electro-Photo-Detective Thief Catcher

New Government Lightships

Bushmen Killing a Lion

By Parker Gillmore

Experiments with Water Jets

Departments

  • Letters

    Correspondence- August 13, 1892

  • Departments

    Notes & Queries- August 13, 1892

  • Recently Patented Inventions- August 13, 1892

  • Business and Personal- August 13, 1892

  • Index of Inventions- August 13, 1892

  • To Inventors- August 13, 1892

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