Volume 5, Issue 23
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Features
Notes on Military and Naval Affairs
Magnetic Electricity
The Geological History of North America
Testing Boiler Water Gages
Hardening and Tempering Tools and Metals
Embossing Designs on Metals
Chemistry of Iron
Manufacture of Steel
Fifteen Thousand Patents Secured Through our Agency
England and the United States
Influence of Inventors Upon Their Age
Interesting Facts About Electroplating
The Coast Survey and the Government
Melodeons--Harmoniums
Recent American Inventions
Information Useful to Patentees
To Our Editorial Brethren
Patent Claims
Issued from the United States Patent Office