Scientific American Magazine
Volume 21, Issue 25You are currently logged out. Please sign in to download the issue PDF.
Features
Sinking Screw Piles, Acid Rivers and more
The Celebrated Crosse Experiments
The Toad as an Entomologist
Railway Carriages in Different Parts of the World
Smith's Improved Corn Sheller
The Ejector Condenser
How Trains are Moved by Telegraphic Signals
The Manatee: The Human Fish
A Prize for Everybody
The Asserted Superiority of the Right Hand
Causes and Prevention of Fires.—The Metro-Politan Fire Department
The Suez Canal
A Remedy for Strikes
The Spanish Gunboats
Men of Progress: —Celebrated American Inventors
The Rights of the Government and Patentees
Announcement for 1870.—A Splendid Work of Art and Cash Premiums to be Given
New Publications
Report of the Judges of Department of Steam Engineering at the American Institute Fair
Recent American and Foreign Patents
Patent Decision
Answers to Correspondents
Official List of Patents
Departments
Correspondence
Business and Personal
