Volume 5, Issue 21
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Features
Notes on Military and Naval Affairs
The Geological History of North America
Improvement in Casting Rollers for Rolling Mills
Lead Mines--Process of Smelting
Chemistry of Iron
Gladstone on Nature and Art
Progress of the Electric Telegraph
The Great Industrial Exhibition--Important to Inventors
Changes in Our Manufactures
Fifteen Thousand Patents Secured Through Our Agency
Deposition of King Cotton
The Successors of the Urets
A Northeast Storm Moves Against the Wind
Transferring Steel Engravings on Bank Notes
The Ericsson Battery
Notes on Foreign Inventions
Patent Claims
Issued from the United States Patent Office