Volume 22, Issue 9
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Features
Platinized Looking-Glasses
Yaupon Teas of Carolina—Mate of Paraguay
Guatemala, Its Inhabitants and Products-- Advice to Emigrants
English and American Iron-Clads Compared
[From the Army and Navy Journal.]
The Eagle Carpet Stretcher
How to Hitch Three Horses to One Plow
A Journey with a Raft
From the Building News
Improved Patent Vertical Drill
French Experiments with Liquid Fuel
The Wages of Machinery
Waste of Labor in Building
The Water Wheel Tests at Lowell
The Economy of Steam Engines
Liebig on Fermentation
A Mile a Minute
Positive Philosophy
Recent American and Foreign Patents- February 26, 1870
Under this heading we shall publish weekly notes of some of the more prominent home and foreign patents.
Scientific Intelligence- February 26, 1870
Patent Office Decisions- February 26, 1870
Answers to Correspondents- February 26, 1870
Official List of Patents- February 26, 1870
Issued by the United States Patent Office. FOR THE WEEK ENDING FEB. 15,1870. Reported Officially for the Scientific American.