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Features

Changes in United States Patent Laws

The Proposed Government Armor Plant

Some Curious Old Patents

Costly Butterflies

By George E. Walsh

The Dietary of Cyclists

Involuntary Movements as Controlled by Ideas

A Pump for Pneumatic Tires

An Improved Double Grinding Mill

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

"Gone"

To Inventors - December 11, 1897

Departments

  • Recommended

    New Books, Etc. - December 11, 1897

  • Departments

    Business and Personal - December 11, 1897

  • Recently Patented Inventions - December 11, 1897

  • Notes and Queries - December 11, 1897

  • Index of Inventions - December 11, 1897

  • Patents - December 11, 1897

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December 11, 1897

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