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The Rowell Automatic Railway Safety Stop

Torpedo Boats

Ships and Guns Needed for Defense

An Improved Lawn Mower

A Device for Automatically Lighting Fires

An Improved Hat Holder

An Improved Can Opener

An Improved Hoist

An Improved Channel Cleaner

An Improved Irrigating Apparatus

An Improved Dust Guard and Ventilator

An Improved Switch Signal

New Elevated Railway

Electric Lighting for Amateurs

An Improved Compound Engine

An Improved Dynamometer

To Inventors- May 10, 1890


  • Letters

    Correspondence- May 10, 1890

  • Recommended

    New Books and Publications- May 10, 1890

  • Departments

    Business and Personal- May 10, 1890

  • Notes and Queries- May 10, 1890

  • Recently Patented Inventions- May 10, 1890

  • Index of Inventions- May 10, 1890

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May 10, 1890

Science for the Modern World