Volume 22, Issue 4
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Features
The Leclanche Battery
Science and the Public Health
The Reptiles at the Zoological Gardens
From Naturalists' Note Book.
Rain and Rain Doctors
Improved Packing for the Pistons of Steam Engines
Curious Ice Formations
On the Nature of the Interplanetary Medium
Manufacture of the Points of Needles and Pins by Electricity
Nature of Design Patents
Progress in Mechanical and Engineering Science and Invention in 1869
The Careless Use of Lucifer Matches
Scientific Intelligence- January 15, 1870
The Mild Winter
On Cotton Seed and Cotton Seed Oil
Michael Faraday
Recent American and Foreign Patents—January 15, 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
RIVAL SEWING MACHINES—INJUNCTION.
Answers to Correspondents- January 15, 1870
Official List of Patents- January 15, 1870
Issued by the United States Patent Office. For the week ending Jan. 11, 1870. Reported Officially for the Scientific American.