Features
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
Mental Order and System
Extinguishing Fires at their Commencement
Graphite, Plumbago, Black Lead
The Threaded Envelope Patents
Photographic Notes- July 22, 1871
What is Doing at the Patent Office--Great Number of Applicants for Extensions
Professor Tyndall on "Dust and Smoke"
Editorial Summary- July 22, 1871
No List of Patentees
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
