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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

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

Coal and Wood-Burning Locomotives

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

Rates of Advertising

Change in the Patent Laws

New Arrangements--Patents Granted for Seventeen Years

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