Great Reduction in Cost of Steam Power--Remarkable Results
Hydraulic Cements--Their Adaptability for Useful and Ornamental Purposes
A Paper, read before the Polytechnic Association of the American Institute by Adolph Ott. PART II.
Friction Gearing Versus Belts and Cog Wheels
The Allegheny Observatory
The Attraction of the Moon
The Modern Theory of Heat Applied to the Phenomena of Latent Heat, Combustion, Etc.
Expose of the Tricks of the Davenport Brothers
Lewis' Twine Cutter
Health and Disease
What is a Machine?
Poisoning by Antimony.--The Wharton Trial
The Agassiz Exploring Expedition--Interesting Results Already Obtained
The Study of Alloys
The American Master Mechanics' Association
Loiseau's Compressed Fuel
Hall of the Franklin Institute, Philadelphia, December 19, 1870.
Applications for Extension of Patents
To City Subscribers - January 13, 1872
Recent American and Foreign Patents
Under this heading we shall publish weekly notes of some of the more prominent home and foreign patents.
- From the Editor
Answers to Correspondents - January 13, 1872
Correspondence - January 13, 1872
New Books and Publications - January 13, 1872
Business and Personal - January 13, 1872
Notes and Queries - January 13, 1872
Index of Inventions - January 13, 1872