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Improved Water Motor, A Strong Room, and more

Facts About Petroleum

Farmers' Club

Polytechnic Association of the American Institute

Miscellaneous Summary

Camp Nelson Water Works

Satuders's Friction Weight for Beams

Saunders's Improved Bobbin


The Great Victory

Value of Coal Ashes

Knowing Too Much

Microscopic Objects

Recent American Patents

Patent Claims

Rates of Advertising

Notice to Subscribers

To Our Readers

Special Notice to Inventors

The Cheapest Mode of Introducing Inventions

A Valuable Work for Inventors Patentees and Manufacturers



  • Departments


  • Notes and Queries

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