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Screen Photography in Colors

The Pennsylvania Anthracite Coal Fields

Prof. John Tyndall

A New System of Lighting Street Gas Lamps Without the Use of Wires

An Improved Adding Machine

A Brake for Portable Engines, Etc.

Automatic Distributor of Perfumes

A New Storage Battery

The Bundy Automatic Time Recorder at the Exposition

A Novelty for the Midwinter Fair

The Broadway Cable Railway

United States Large Caliber Mortars

Experiment on the Tension of Liquid Films

A Carbonic Acid Motor

By Gustave Michaud

To Inventors


  • Departments

    Recently Patented Inventions

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  • Index of Inventions

  • Notes and Queries

  • Business and Personal

  • Patents

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The Essential Guide to the Modern World

The Essential Guide to the Modern World