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Features

The Excelsior Universal Wood Worker

Patent Law Amendments

Can Ants Talk?

Prospects for 1875

The Sewing Machine

An Ancient Metric System

Science Record for 1875

The Underground Railway, New York City

Combined Wrench and Bolt Cutter

Baker's Improved Bootjack

The Belgian Mode of Lowering Miners in Shafts

Practical Mechanism

By Joshua Rose

Improved Camp Lounge

Improved Grate Bar

Remarkable Birds

Recent American and Foreign Patents - February 13, 1875

Decisions of the Courts

Communications Received - February 13, 1875

Canadian Patents - February 13, 1875

Departments

  • Letters

    Correspondence - February 13, 1875

  • Departments

    Notes and Queries - February 13, 1875

  • Business and Personal - February 13, 1875

  • Index of Inventions - February 13, 1875

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February 13, 1875

Scientific American Space & Physics