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Some Curious Old Patents

Changes in United States Patent Laws

The Proposed Government Armor Plant

Involuntary Movements as Controlled by Ideas

The Dietary of Cyclists

Costly Butterflies

By George E. Walsh

An Improved Double Grinding Mill

A Pump for Pneumatic Tires

An Automatic Electric Time Switch

Pneumatic Mail Tube System, New York City

A Low Priced Graphophone

A "Tug of War" between Early Steamships

Trial Trip of a British Built Torpedo Boat Destroyer for the Spanish Government

The Buchanan-Gordon Diving Dress

An Improved Bicycle Brake


To Inventors - December 11, 1897


  • Recommended

    New Books, Etc. - December 11, 1897

  • Departments

    Business and Personal - December 11, 1897

  • Notes and Queries - December 11, 1897

  • Recently Patented Inventions - December 11, 1897

  • Index of Inventions - December 11, 1897

  • Patents - December 11, 1897

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