Volume 21, Issue 15
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Features
What is Found in the Air
From the Scientific Review
Death Watch—Natural Size and Magnified
Obituary—Thomas Graham Chemist
Editorial Summary
Aero-Steam Engines—Storm's Experiments
Sibley's Improved Leveling Instrument
The Exhibition of The American Institute
American Engineering in China
Steam Pipes as Causes of Fire
Manufacturing, Mining, and Railroad Items
New Publications
Man in Genesis and Geology; or, the Biblical Account of Man's Creation, Tested by Scientific Theories of his Origin and Antiquity. By Joseph P. Thompson, D.D., LL.D. New York: Samuel R. Wells, Publisher, 389 Broadway
Omission of Oath Under Sec. 6. Act of 1836—Fraud in Obtaining the Extension—Third Parties Cannot take Advantage of Same—Law of Combinatlons—What Will Infringe a Combination Claim
Recent American and Foreign Patents
Under this heading we shall publish weekly notes of some of the moreprom-inent home andforeign patents.