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Features

Balanced Screw and Revolving Cotton Press

The Railways of the United States

Four Footed Motion

Government Aid to Scientific Investigation

Some of the Uses of Paraffin

Refrigerating Mixtures and Their Physiological Effects

New Law Concerning Copyrights for Labels

Scientific and Practical Information - July 11, 1874

Progress of the Fireless Locomotive

The Effect of Air Pressure on Animal Life

The Gravitation Compass

A Navigable Diving Bell

Improved Steam Engine

Astronomical Notes - July 11, 1874

Observatory of Vassar College.

Practical Mechanism Number IV.- July 11, 1874

By Joshua Rose.

A Novel Needle

Taper Sleeve Pulley and Wheel Fastener

A New Water Pitcher

Various Methods of Cooling Air

Medical Notes - July 11, 1874

Recent American and Foreign Patents - July 11, 1874

Answers and Correspondents - July 11, 1874

Communication Received - July 11, 1874

Canadian Patents - July 11, 1874

Departments

  • Letters

    Correspondence - July 11, 1874

  • Recommended

    New Books and Publications - July 11, 1874

  • Departments

    Business and Personal - July 11, 1874

  • Index of Inventions - July 11, 1874

  • Patents - July 11, 1874

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July 11, 1874

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