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Features

The Hamilton Surface Planer

Cheap Workmen Make Dear Work

The Relation of Alcohol to Physical Strength

The Labor Prospects for the Winter

Scientific and Practical Information - November 21, 1874

The Sensation of Pain in the Lower Animals

Chain Towage on the St. Lawrence

The Automatic Gas Saver

The Underground Railway, New York City

Practical Mechanism - November 21, 1874

Number XIII.

By Joshua Rose

A New Detachable Horseshoe

Willahs' Three-Cylinder Engine

Improved Cork-Soled Boots

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

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