Volume 23, Issue 1
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Features
Pacific Hotel, Chicago
Scientific Intelligence- July 2, 1870
Tussock-Moths
The Friction of Steam Engines
Other Worlds than Ours
Recent Progress in Chemistry
The Management of Railways
Uses of Fluor Spar
The Report of Col. W. A. Roebling, Chief Engineer of the N. Y. Bridge Co.
Patent Rights in Congress
Macfie the Irrepressible upon Patent Law
Patent Office Affairs - July 2, 1870
Answers to Correspondents- July 2, 1870
Recent American and Foreign Patents- July 2, 1870
Ice Pitcher Case.--In the U. S. Circuit Court, Eastern Distict of Pennsylvania
Official List of Patents- July 2, 1870
Issued by the United States Patent Office