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Prof. John Tyndall

The Pennsylvania Anthracite Coal Fields

Screen Photography in Colors

A Brake for Portable Engines, Etc.

Automatic Distributor of Perfumes

An Improved Adding Machine

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

The Bundy Automatic Time Recorder at the Exposition

A New Storage Battery

A Novelty for the Midwinter Fair

The Broadway Cable Railway

United States Large Caliber Mortars

A Carbonic Acid Motor

By Gustave Michaud

Experiment on the Tension of Liquid Films

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December 16, 1893

See the World from a Different Perspective

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