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    Thomas Henry Huxley

    Improved Chimney Cleaner

    Perpetual Motion

    Machine for Oiling Wool

    Carbureted Hydrogen Gas

    Automatic Telegraphy

    By D. H. Craig

    American Institute Lectures.--The Struggles of Science

    Dr. Doremus on the Triumphs of Science

    Progress of Chemical Science

    The Solar Eclipse of 22nd December, 1870

    Six Months of Progress in Engineering

    Fatal Explosion of a Gasoline Reservoir--A Warning to Mechanics

    The Uses of Dissociation

    Testing the Strength of Boilers by Steam Pressure

    Standard Public Time

    Scientific American 1871

    Queries- January 1, 1871

    We present herewith a series of inquiries embracing a variety of topics of greater or less general interest. The questions are simple, it is true, but we prefer to elicit practical answers from our readers.

    Harvey Brown

    Answers to Correspondents- January 1, 1871

    Recent American and Foreign Patents- January 1, 1871

    Under this heading we shall publish weekly notes of some of the more prominent home and foreign patents.

    Official List of Patents- January 1, 1871

    Issued by the U. S. Patent Office for the Week Ending December 20, 1870. Reported Officially for Scientific American.

    Departments

    • Letters

      Correspondence- January 1, 1871

    • Departments

      Business and Personal- January 1, 1871

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    January 01, 1871

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