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Features

The Hamilton Surface Planer

Cheap Workmen Make Dear Work

The Labor Prospects for the Winter

The Relation of Alcohol to Physical Strength

The Sensation of Pain in the Lower Animals

Scientific and Practical Information - November 21, 1874

The Automatic Gas Saver

Chain Towage on the St. Lawrence

The Underground Railway, New York City

Practical Mechanism - November 21, 1874

Number XIII.

By Joshua Rose

Improved Cork-Soled Boots

Willahs' Three-Cylinder Engine

A New Detachable Horseshoe

The Buildings for the Centennial Exhibition

The Franklin Institute Exhibition

Recent American and Foreign Patents - November 21, 1874

Answers to Correspondents - November 21, 1874

Canadian Patents - November 21, 1874

Communications Received - November 21, 1874

Departments

  • Letters

    Correspondence - November 21, 1874

  • Recommended

    New Books and Publications - November 21, 1874

  • Departments

    Business and Personal - November 21, 1874

  • Index of Inventions - November 21, 1874

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November 21, 1874