Improved Chimney Cleaner
Machine for Oiling Wool
Carbureted Hydrogen Gas
American Institute Lectures.--The Struggles of Science
Dr. Doremus on the Triumphs of Science
Progress of Chemical Science
The Solar Eclipse of 22nd December, 1870
Six Months of Progress in Engineering
Standard Public Time
Testing the Strength of Boilers by Steam Pressure
Fatal Explosion of a Gasoline Reservoir--A Warning to Mechanics
The Uses of Dissociation
Scientific American 1871
Answers to Correspondents- January 1, 1871
Queries- January 1, 1871
We present herewith a series of inquiries embracing a variety of topics of greater or less general interest. The questions are simple, it is true, but we prefer to elicit practical answers from our readers.
Recent American and Foreign Patents- January 1, 1871
Under this heading we shall publish weekly notes of some of the more prominent home and foreign patents.
Official List of Patents- January 1, 1871
Issued by the U. S. Patent Office for the Week Ending December 20, 1870. Reported Officially for Scientific American.
Correspondence- January 1, 1871
Business and Personal- January 1, 1871