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Features

“How Steel Hardens”

Mr. Converse's Patent Bill

Artificial Ice Skating Rink, New York.

Why the Thunderer's Gun Burst

Approximate Economy of Gas and Electric Lighting

The Corundum Mines of North Carolina

Improved Revolving Derrick

Life Preserver Exhibitor

New Egg Beater

Agricultural Inventions

New Agricultural Engine

American Industries--No. 31.

New Steering Apparatus

The Binary Absorption System of Refrigeration

Marine and Land Hermit Crabs

By A. W. Roberts

The Electric Sun

The Steam Velocipede

Miscellaneous Inventions

Engineering Inventions

Departments

  • Departments

    Correspondence

  • Business And Personal

  • Notes and Queries

  • New Books And Publications

  • Index of Inventions

  • Patents

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