Volume 27, Issue 22
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Features
A New Application of Tube Hydrometers
The Institution of Civil Engineers
Remarkable Structures of the Ancient Americans
The Agricultural Department at Washington
Transmission of Motion
A Lecture Delivered by Coleman Sellers, at the Stevens Institute of Technology, Hoboken, N. J., February 19th, 1872
Absurd Cosmical Theories
Fire
Sewing Machine Treadle and Casters
Hay and Straw Stacking Apparatus
Remarkable Stupidity
The Nose Straightener
The Horse Disease
The Vienna Exposition
Oxyhydric Illumination
The Growth or Evolution of Structure in Seedlings
Air Gas Light in England
Our Concrete Docks
Professor James Hadley
Patent Decision
Progress of American Iron Industry
Answers to Correspondents
Scientific and Practical Information
Communications Received
Recent American and Foreign Patents
Value of Patents, and How to Obtain Them
Practical Hints to Inventors