Scientific American Magazine
Volume 7, Issue 21You are currently logged out. Please sign in to download the issue PDF.
Features
Improved Patent Horse Rake, The Broom Business, and More
Manufacture of Elastic Toys
Valuable Receipts
What May Be Seen at the Atlantic Docks
The Science of Steam Engineering
The New Atlantic Telegraph
The Safety Valve
Slackness at the Patent Office
An Important Crisis in the History of Newspaper Publishing
General Mitchell
The Continental Telegraph
Improved Tools
Sharpshooters
Patent Business in 1880 and 1862
Recent Foreign Inventions
Recent American Inventions
Patent Claims
To Our Readers
Brown's Patent Automatic Letter-Box
Departments
Correspondence
Notes and Queries
