Volume 24, Issue 6
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Features
The Water We Drink
The Year and the Day
Perpetual Motion- February 4, 1871
Improved Externally Adjustable Packing for Pistons
Scrubbing Machine
Quartz Crusher
Action of the Reciprocating Parts of Steam Engines, and Its Influence on the Problem of High Piston-Speed
Read before the Polytechnic Club of the American Institute by Chas T. Porter.
Improved Sewing Machine
The Uses of Habit
English and American Scientific, Mechanical, and Engineering Journalism
Soluble Glass
Type-Setting Machines
The Present and the Past
NO. II—Facts of the Present—Destroying Agencies.
The Scientific Value of the Central Park
The Eclipse Expeditions
Obituary.--Hon. David Lyman
Cryolite and Its Uses
Thatch Made by Sewing Machines
Answers to Correspondents- February 4, 1871
A Remarkable Body of Water
From the American Journal of Microscopy, by Prof. J. P. Stelle.
Queries- February 4, 1871
Recent American and Foreign Patents- February 4, 1871
Official List of Patents- February 4, 1871
Issued by the U. S. Patent Office