Double Ratchet Brace
Ancient and Modern Industries of the Chinese
The Tanite Solid Emery Wheel
Manufacture of Indian Ink
From the Mechanics' Magazine.
Improved Open Fire Grate
The Egyptian Fellah
Our Splendid Engraving
Ludlow's Sliding Stop Valves for Steam, Water, and Gas
Improved Lever Escapement
The Scientific American in 1869
Is Water Necessary to Mitigate the Effects of Dry Air from Heating Furnaces?
Tin--Where and How It Is Obtained
The Steam Engine Trials at the American Institute Exhibition
A Peculiar Feature of Agricultural Invention
Ancient Modes of Extinguishing Fires
On Cotton Seed and Cotton Seed Oil
Recent American and Foreign Patents- January 29, 1870
Under this heading we shall publish weekly, notes of some of the more prominent home and foreign patents.
United States Circuit Court--Southern District before Judge Blatchford
Applications for Extension of Patents- January 29, 1870
Answers to Correspondents- January 29, 1870
Official List of Patents- January 29, 1870
Issued by the United States Patent Office. For the week ending Jan. 18, 1870. Reported Officially for the Scientific American.
Correspondence- January 29, 1870
New Books and Publications- January 29, 1870
Business and Personal- January 29, 1870