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Features

Improved Hot Air Furnace, Why Does Gunpowder Drive a Ball from a Cannon and more

Romance of the Steam Engine - February 23, 1861

American Engineers' Association

Humbert's Improved Watch Escapement

Column of Varieties

Altering our Naval Vessels

What Inventors Have Done

Another Great Mechanic Gone

American Coal

Unproductive Consumption of Wealth

The Proposed New Tariff

Passage of the Patent Bill

The Polytechnic Association of the American Institute

Patent Claims - February 23, 1861

Departments

  • Letters

    Our Correspondence - February 23, 1861

  • Departments

    Notes and Queries - February 23, 1861

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February 23, 1861

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