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Economical Method of Manufacturing Salt

Colburn on Steam Roilers

Changing Iron to Steel by Carbonic Oxide

Warren's Deep-Well Oil Pump

Polytechnic Association of the American Institute

Farmers' Club

Mr. Ruggles at New Haven

A New Phrenological Bust

Reed And Packard's Spring-Catch Button

The Russian Monitors at Sea

Welding by Pressure

Why Cake Tastes of Turpentine

Costliness of Complicated Steam Engines

Miscellaneous Summary

Recent American Patents

Patent Claims

Issued From The United States Patent-Office

To Our Readers

Howard's Coin Safe


  • Departments


  • New Books and Publications

  • Patents

  • Notes and Queries

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