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Features
Improved Street Letter-Box for Lamp Posts, History of Carpeting, and more
Perpetual Motion
Adjustable Stand for Draftsmen
Exercising Apparatus
Tunnel Excavator
Siemens' Pyrometer
Dr. Doremus on the Triumphs of Science
Illinois and St. Louis Bridge Company--Report of Capt. James B. Eads, Chief Engineer
Artesian Wells
Explosions from Hydraulic Pressure
Scientific Administration
The Great British Problem
The Foremanizing Process for Preserving Timber, The Victims of Its Poisonous Effects, and the Suits at Law Which have been Instituted to Recover Damages
Scientific Intelligence- December 17, 1870
Scientific American- December 17, 1870
Answers to Correspondents- December 17, 1870
Queries- December 17, 1870
Official List of Patents- December 17, 1870
Recent American and Foreign Patents- December 17, 1870
