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Report of the Experiments with the Turbine Water Wheels at Philadelphia

Romance of the Steam Engine

Column of Varieties

The Armstrong Gun a Failure

Can the Rifling of Guns be Dispensed With

The Commissioner of Patents—New Examiners

Our Secession Troubles

Wealth—A Review of the Subject

The Polytechnic Association of the American Institute

Patent Claims - April 13, 1861

Issued from the United States Patent Office

Glaciers

Hale's Mode of Impelling Shot and Shell

Departments

  • Letters

    Correspondence - April 13, 1861

  • Departments

    Notes and Queries - April 13, 1861

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April 13, 1861

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