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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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