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Features

The New York Signal Service Station

The International Marine Conference

Mr. Hopkins' New Book, "Experimental Science"

Incandescent Lighting

An Improved Electrical Door Alarm

An Improved Lathe Dog

An Improved Meat-Carrying Apparatus

Improved Vehicle Running Gear

An Improved Screwdriver and Wrench

An Improved Cotton Cultivator

Dernell's Clevis Arm for Ice Flows

Germany's Floating Exposition

Willard Condensing Engine

Departments

  • Letters

    Correspondence- November 2, 1893

  • Recommended

    New Books and Publications- November 2, 1893

  • Departments

    Business and Personal- November 2, 1893

  • Notes and Queries- November 2, 1893

  • Recently Patented Inventions- November 2, 1893

  • Index of Inventions- November 2, 1893

  • To Inventors- November 2, 1893

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November 02, 1889

Beyond XX and XY

Biology. Identity. Equality.

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