Scientific American Magazine
Volume 4, Issue 20You are currently logged out. Please sign in to download the issue PDF.
Features
The Fifteen-Inch Gun
The War
American Machines and Implements for England
Keep the Machinery Running
Working Steam Expansively
War, Business and Women
Determining Distances by Light, Angles, Sound and Walking
Romance of the Steam Engine
Letter from our Washington House
Patent Claims - May 18, 1861
To Our Readers
Departments
Correspondence - May 18, 1861
Notes and Queries - May 18, 1861
