The Peters Process of Manufacturing Steel from Pig Iron, Improved Oil-Stone Holder, and more

Pacific Hotel, Chicago

Scientific Intelligence- July 2, 1870

Tussock-Moths

The Friction of Steam Engines

The Management of Railways

Recent Progress in Chemistry

Other Worlds than Ours

Patent Office Affairs - July 2, 1870

Macfie the Irrepressible upon Patent Law

Patent Rights in Congress

The Report of Col. W. A. Roebling, Chief Engineer of the N. Y. Bridge Co.

Uses of Fluor Spar

Ice Pitcher Case.--In the U. S. Circuit Court, Eastern Distict of Pennsylvania

Recent American and Foreign Patents- July 2, 1870

Answers to Correspondents- July 2, 1870

Official List of Patents- July 2, 1870

Issued by the United States Patent Office

Applications for the Extension of Patents- July 2, 1870