Volume 5, Issue 20
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Features
Notes on Military and Naval Affairs
The Geological History of North America
Discussion of the Crank Motion
On the Gyratory Movement of a Liquid Mass
Chemistry of Iron
Lead Mines—Process of Smelting
International Exhibition of Industry and Art
Street and Station Indicator for Railway Cars
Cutting Spiral Moldings
American Saltpeter
Difficulties in Conducting a Paper—Contributions Wanted
British and American Iron-Clad Ships of War
Fifteen Thousand Patents Secured through our Agency
Blue Army Cloth
Vulcanizing India Rubber
New Line of Mammoth Atlantic Steamers
The Patent Law in the Hands of a Cambridge Professor
Recent American Inventions - November 16, 1861
Patents Claims - November 16, 1861
Issued from the United States Patent Office