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Features

A Mammoth Band Saw

A Uniform System of Colors

Sailing Faster Than the Wind

Papin's Digester for Cooking

Dangerous Mineral Oils

Scientific and Practical Information

The Invention of the Leyden Jar

Barber's Hair Blowing Apparatus

Improved Folding Chair

Elastic Washing Mitts

Early Plans for Railways

The Pantagraph

Soap Holder

Screw Driver Attachment

Grocer's Sample Case

Bradley's Cushioned Hammer

Improved Wash Boiler Attachment

Blasting in a Coal Mine

Patent Office Decisions

Decisions of the Courts

United States Circuit Court

Recent American and Foreign Patents

Answers to Correspondents

Communications Received

Departments

  • Departments

    Correspondence - March 22, 1873

  • New Books and Publications - March 22, 1873

  • Notes and Queries - March 22, 1873

  • Business and Personal - March 22, 1873

  • Index of Inventions - March 22, 1873

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March 22, 1873

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