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Features

Balanced Screw and Revolving Cotton Press

Four Footed Motion

The Railways of the United States

Some of the Uses of Paraffin

Government Aid to Scientific Investigation

New Law Concerning Copyrights for Labels

Scientific and Practical Information - July 11, 1874

Refrigerating Mixtures and Their Physiological Effects

Progress of the Fireless Locomotive

The Effect of Air Pressure on Animal Life

A Navigable Diving Bell

The Gravitation Compass

Improved Steam Engine

Astronomical Notes - July 11, 1874

Observatory of Vassar College.

Practical Mechanism Number IV.- July 11, 1874

By Joshua Rose.

A New Water Pitcher

Taper Sleeve Pulley and Wheel Fastener

A Novel Needle

Various Methods of Cooling Air

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

  • Medical Notes - July 11, 1874

  • 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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