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Features

American Industries.--No. 66

Rights of Patentees while in the Employ of the Government

Vaccination and Revaccination

A Telephonic Controversy Settled

The Petroleum Basins of Wyoming

Experiments with Underground Wires

A Seat for Shop Girls

The Huston Self-Leveling Berth

Improved Steam Crane

Improved Clevis

Electro-Metallurgy

Improved Air Refrigerating Machine

American Built Steel Steamer for the River Magdalena

By H. L. Bridwell

The Gecko, or Wall Lizard

Communications Received

Departments

  • Departments

    Recent Inventions

  • Correspondence

  • Business and Personal

  • Notes and Queries

  • Index of Inventions

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February 19, 1881

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