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Features

Improved Diamond Stone Saw

Electric Earth Batteries

Torpedoes for Harbor Defense

Something about Balloons

Scientific and Practical Information

Senate Confirmations

Filtration under Pressure

Improved Die Tap

The Underground Railway, New York City

The Crescent Steel Works at Pittsburgh, PA

Practical Mechanism

By Joshua Rose

Cutting Gear Wheels

The Bessemer Saloon Steamship

Highland and Lowland Cattle

Decisions of the Courts

The Vegetable Fibers at the Universal Exposition, Vienna

Number II

By Professor Dr. Julius Wiesner

Recent American and Foreign Patents - January 30, 1875

Canadian Patents - January 30, 1875

Communications Received - January 30, 1875

Departments

  • Letters

    Correspondence - January 30, 1875

  • Recommended

    New Books and Publications - January 30, 1875

  • Departments

    Business and Personal - January 30, 1875

  • Notes and Queries - January 30, 1875

  • Index of Inventions - January 30, 1875

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January 30, 1875

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