Scientific American Magazine
Volume 22, Issue 14You are currently logged out. Please sign in to download the issue PDF.
Features
Improved Bolt Cutter, Improved Self-Connecting Car Coupling, and more
The Manufacture of Fire Bricks
Chemical News
The Guava
Something about Silver
What are Condiments?
Natural History--The Great Auk
Improved Implement for Drawing Nails
Portable Laughing Gas
The Yosemite Valley
Improved Coal-Breaking Machine
Rapid Telegraphy
An Invisible Chain and a Silent Conflict
The Darien Canal--Will it Pay to Build it?
How Fire Bricks are Made
The Study of Alloys
Butter and Its Adulterations
Economy in the Use of Time
The Wind Month
U. S. Patent Office
Answers to Correspondents- April 2, 1870
Recent American and Foreign Patents- April 2, 1870
Official List of Patents- April 2, 1870
Departments
Correspondence- April 2, 1870
Business and Personal- April 2, 1870
New Books and Publications- April 2, 1870
