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Improved Paging Machine

Romance of the Steam Engine

Flax and Cotton

Ships' Compasses—Dangerous Attraction—Engines and Iron Hulls

The Polytechnic Association of the American Institute

Patent Claims - April 20, 1861

Issued from the United States Patent Office


  • Letters

    Our Editorial Correspondence - April 20, 1861

  • Departments

    Notes and Queries - April 20, 1861

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April 20, 1861

Of Shamrocks and Science

Happy St. Patrick’s Day