Scientific American Magazine
Volume 52, Issue 13You are currently logged out. Please sign in to download the issue PDF.
Features
Patent Office Examinations of Novelty of Inventions
A New Commissioner of Patents
The Working Power of Man
Aspects of the Planets for April - 1885
Improved Tire Tightener
Improved Car Coupling
Steam Engine Governor
Improved Barbed Wire Fence
Friction Roller Bearing
Artificial Ear Drum
Tchebichef's Walking Machine
The New York Trade Schools
Hand Propeller for Boats
Improved Hydraulic Shearing Machine
Machine for Sewing Linings in Hat Bodies
Migration of Blowing Vipers
Mother-Of-Pearl
The Columbia Two Track Tricycle
The Rudder of the Alaska
Agricultural Inventions - March 28, 1885
Miscellaneous Inventions - March 28, 1885
Engineering Inventions - March 28, 1885
Departments
Notes and Queries - March 28, 1885
Business and Personal - March 28, 1885
Index of Inventions - March 28, 1885
