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Features

Self-Propelling Rotary Steam Plow

Romance of the Steam Engine

Aniline Dyes

Column of Varieties

Breech-Loading Cannon

The Report of the Commissioner of Patents

The New President and the Commissioner of Patents

The Polytechnic Association of the American Institute

Patent Claims - March 9, 1861

Departments

  • Letters

    Our Correspondence - March 9, 1861

  • Departments

    Notes and Queries - March 9, 1861

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