Scientific American Magazine
Volume 31, Issue 21You are currently logged out. Please sign in to download the issue PDF.
Features
The Hamilton Surface Planer
The Relation of Alcohol to Physical Strength
The Labor Prospects for the Winter
Cheap Workmen Make Dear Work
The Sensation of Pain in the Lower Animals
Scientific and Practical Information - November 21, 1874
The Automatic Gas Saver
Chain Towage on the St. Lawrence
The Underground Railway, New York City
Practical Mechanism - November 21, 1874
Improved Cork-Soled Boots
A New Detachable Horseshoe
Willahs' Three-Cylinder Engine
The Buildings for the Centennial Exhibition
The Franklin Institute Exhibition
Recent American and Foreign Patents - November 21, 1874
Answers to Correspondents - November 21, 1874
Canadian Patents - November 21, 1874
Communications Received - November 21, 1874
Departments
Correspondence - November 21, 1874
New Books and Publications - November 21, 1874
Business and Personal - November 21, 1874
Index of Inventions - November 21, 1874
