Volume 22, Issue 5
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Features
Improvement in Sulky Harrows, Lighting Mines with Gas
Agricultural Engineering
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 Barracuda
The Egyptian Fellah
Ludlow's Sliding Stop Valves for Steam, Water, and Gas
Improved Lever Escapement
Our Splendid Engraving
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
A Peculiar Feature of Agricultural Invention
The Steam Engine Trials at the American Institute Exhibition
Wanted--Better Sidewalks
Ancient Modes of Extinguishing Fires
Slate Pencils
On Cotton Seed and Cotton Seed Oil
United States Circuit Court--Southern District before Judge Blatchford
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.
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.