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Scientific American Magazine Vol 50 Issue 14

Scientific American Magazine

Volume 50, Issue 14

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Features

Movable Theater Stages

Probable Defeat of the Bad Patent Bills

Extracts from the Letter of the Hon. Benjamin Butterworth, Commissioner of Patents, to the Cincinnati Convention of Inventors

United States Patent office, Washington, March 23, 1884

Improved Refrigerator

The International Electrical Exhibition

Improved Ship Cleaner

The Remington Drop Hammer

Improved Steam Engine

Improved Steel Horse Collar

The New Dynamite Gun

Jade and Jade Objects from Central America

Miscellaneous Inventions - April 5, 1884

Agricultural Inventions - April 5, 1884

Engineering Inventions - April 5, 1884

Mechanical Inventions - April 5, 1884

Departments

Correspondence - April 5, 1884

Business and Personal - April 5, 1884

New Books and Publications - April 5, 1884

Notes and Queries - April 5, 1884

Index of Inventions - April 5, 1884

Patents