Volume 25, Issue 14
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Features
Extension of Sarvin's Carriage Wheel Patent
The New Restaurant at Wimbledon Camp
Vitt's Improved Elevator Cup
Death of Professor D. H. Mahan
Inauguration of the Mont Cenis Tunnel
Fearful Explosion of Torpedoes--Coroner's Verdict
The Action of Trades Unions in Regard to Apprenticeship
The Fear of Cholera
Progress of Underground Roadways
Fair of the American Institute
Interesting Extension Cases
Answers to Correspondents- September 30, 1871
Queries- September 30, 1871
Applications for Extension of Patents- September 30, 1871
Official List of Patents—September 30, 1871
Issued by the U. S. Patent Office