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    Features

    Suspension Truss Bridge, Powdered Coal for Unhealthy Plants and more

    Self-Lubricating Box and Shaft Bearing

    Alloys for Bells, Gongs, Cymbals, Etc.

    Heat and Light - June 8, 1872

    Improved Puddling Tool

    Strengthening Emery Wheels

    Steam Propulsion on Canals

    Riveting Device

    Peart's Patent Pit Car Wheel

    Mill Step

    Discharging Coal

    The United States Senate on Compensation to Inventors

    Information on Gum Copal

    Eight Hours' Work and Ten Hours' Pay

    The Sewing Machine Ring in a New Role

    Screw Elevators

    Recent American and Foreign Patents - June 8, 1872

    Departments

    • From the Editor

      Answers to Correspondents - June 8, 1872

    • Recommended

      New Books and Publications - June 8, 1872

    • Departments

      Notes and Queries - June 8, 1872

    • Business and Personal - June 8, 1872

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    June 08, 1872

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