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    Features

    The Estes Steam Engine, The General Oceanic Circulation

    Discussion on Mr. Harding's Paper, "Entitled The Application of Steam to Canals", Concluded in Our Last Issue.--No. 1

    Experiences of a Bureau Officer

    King's "Valveless" Engine

    Nelson's Reversible Window Sash

    Fowler's Improved Method of Adjusting Eccentrics

    Infringement Trial

    Graphite, Plumbago, Black Lead

    Extinguishing Fires at their Commencement

    Mental Order and System

    Photographic Notes- July 22, 1871

    What is Doing at the Patent Office--Great Number of Applicants for Extensions

    The Threaded Envelope Patents

    Professor Tyndall on "Dust and Smoke"

    No List of Patentees

    Editorial Summary- July 22, 1871

    Answers to Correspondents- July 22, 1871

    Applications for Extension of Patents- July 22, 1871

    Queries- July 22, 1871

    Recent American and Foreign Patents- July 22, 1871

    Departments

    • Letters

      Correspondence- July 22, 1871

    • Departments

      Business and Personal- July 22, 1871

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    July 22, 1871

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