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Improved Magneto-Electric Battery

Notes on Military and Naval Affairs

The Geological History of North America

By Stevens

Magnetic Electricity

Chemistry of Iron

Embossing Designs on Metals

Hardening and Tempering Tools and Metals

Testing Boiler Water Gages

Manufacture of Steel

Influence of Inventors Upon Their Age

England and the United States

Interesting Facts About Electroplating

Fifteen Thousand Patents Secured Through our Agency


The Coast Survey and the Government

Information Useful to Patentees

To Our Editorial Brethren

Recent American Inventions

Patent Claims

Issued from the United States Patent Office


  • Departments


  • Notes & Queries

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