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    Features

    Machine for Turning the Ends of Axletrees

    Young's Improved Hot Air Register

    Schopp's Push Chair or Ice Velocipede

    Manufacture of Varnish in England

    The Application of Steam to Canals--No. 2

    By George Edward Harding

    Mechanical Tests

    Tools for Cutting Metals

    The Illinois and St. Louis Bridge

    Wood-Boring Beetles

    By E. C. H. Day

    Improvement in Extracting Spirits of Turpentine from Pine Wood

    Repairing Roads

    Guess Work and Real Work

    The Proposed Centennial Exhibition in Philadelphia, in 1876

    The Electric Light

    Scientific Intelligence- June 17, 1871

    A Great Speech

    Klinkerfues' Apparatus for Igniting Gas and Other Lights

    Answer to Correspondence- June 17, 1871

    Queries- June 17, 1871

    Official List of Patents- June 17, 1871

    Issued by the U. S. Patent Office

    Recent American and Foreign Patents- June 17, 1871

    Applications for Extension of Patents- June 17, 1871

    Departments

    • Letters

      Correspondence- June 17, 1871

    • Recommended

      New Books and Publications- June 17, 1871

    • Business and Personal- June 17, 1871

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    June 17, 1871

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