Wood Molding Machine, Improvement in Steam Hammers

Yaupon Teas of Carolina—Mate of Paraguay

Platinized Looking-Glasses

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

The Water Wheel Tests at Lowell

Waste of Labor in Building

French Experiments with Liquid Fuel

The Wages of Machinery

Positive Philosophy

Liebig on Fermentation

A Mile a Minute

The Economy of Steam Engines

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.