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Features

Light for Animals, Improved Rotary Spader and Pulverizer

The Chemical History of a Candle

Bagasse as a Fuel

Romance of the Steam Engine

The New Patent Law

Column of Varieties

Coal and Wood-Burning Locomotives

The New Patent Law for Designs, Trade Marks, Patterns, Co

Comments on the New Patent Law

The Condition of Labor in the City

The Polytechnic Association of the American Institute

Patent Claims - March 23, 1861

Issued from the United States Patent Office

Change in the Patent Laws

New Arrangements--Patents Granted for Seventeen Years

Rates of Advertising

Naylor & Co.'s Cast Steel Bells

Semi-Steel

Prospectus of the Scientific American

Departments

  • Letters

    Our Correspondence - March 23, 1861

  • Departments

    Notes and Queries - March 23, 1861

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March 23, 1861

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