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The Gatling System of Firearms

Triscott and Wheeler's Shoe Fastenings

Patton's Improved Meat Chopper

Rotary Engines

Middle Park, Colorado

Drying Substances by Steam

Publication of the Patents

Congress and Patent Extension Cases

The Positive Motion Loom Grand Medal of Honor

The Stupidity of Ignorance

American Homesteads

Scientific and Practical Information

Extension Cases before Congress

[Special Correspondence of the Scientific American.]

Recent American and Foreign Patents


  • From the Editor

    Answers to Correspondents - March 2, 1872

  • Letters

    Correspondence - March 2, 1872

  • Departments

    Business and Personal - March 2, 1872

  • Notes and Queries - March 2, 1872

  • Index of Inventions - March 2, 1872

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