The Triumphs of Surgery
By Daniel Spill, before the London Photographic Society, Dec. 18, 1870.
Improved Door Guard
Perpetual Motion- January 21, 1871
Wire Stretcher for Fence Building
An Idle Day at Fall River, Mass
Facts and Figures about the Mont Cenis Tunnel
What Ought a Mechanic to Know?
American Gas Wells
Vapor Lamps and Vapor Stoves
The U.S. Signal Service and Storm Signals
New Chemical Products
Progress of Foreign Invention
Important Patent Decision- January 21, 1871
Answers to Correspondents- January 21, 1871
Recent American and Foreign Patents- January 21, 1871
Under this heading we shall publish weekly notes of some of the more prominent home and foreign patents.
Applications for Extension of Patents- January 21, 1871
Official List of Patents- January 21, 1871
Issued by the U. S. Patent Office for the Week Ending Jan. 10, 1871. Reported Officially for the scientific American.
Correspondence- January 21, 1871
New Books and Publications- January 21, 1871
Business and Personal- January 21, 1871