Scientific American Magazine
Volume 62, Issue 7You are currently logged out. Please sign in to download the issue PDF.
Features
The Mechanical Interlocking Switch and Signal System at the Grand Central Depot, New York
European Workers
Helping the Merchant Fleet
An Improved Car Coupling- February 15, 1890
An Improved Musical Instrument
Volt and Ampere Analogies
An Improved Hand Rake
A Combined Cotton Chopper and Cultivator
Engines of the Augusta Victoria
Photographic Notes- February 15, 1890
A New Electric Conduit for Street Cars
The Dog-Headed Opossum
An Improved Electric Signal
Some Effects of Large Currents
Departments
Correspondence- February 15, 1890
Business and Personal- February 15, 1890
New Books and Publications- February 15, 1890
Recently Patented Inventions- February 15, 1890
Notes and Queries- February 15, 1890
Index of Inventions- February 15, 1890
To Inventors- February 15, 1890
