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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

    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

    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

    • Refrigerating Mixtures and Their Physiological Effects

    • 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