Scientific American Magazine
Volume 25, Issue 20You are currently logged out. Please sign in to download the issue PDF.
Features
Electro-Pneumatic Protector, An Italian Diving Bell--The Inventor Writing Letter at the bottom of the sea, and more
Improved Pocket Oiler
Smith's Improved Hollow Auger
Ventilating Grain Vessel and Grain Car
Foster's Thill Coupling
Psychic Force--Further Experiments by Dr Crookes--Reply to his Opponents
On Musical Telegraph Companies
Suitable Building Material for Cities
American Forests
Dr. Crookes and Psychic Force
Propulsion of Street Cars
Use of Sodium for Blasting
Improvement in Pavements--Artificial Stone Flagging for Sidewalks
The Health of Baron Liebig
General Reflections Suggested: by the Fair of the American Institute
Queries- November 4, 1871
Recent Patent Decisions- November 4, 1871
Our Chicago Exchanges
Applications for Extension of Patents- November 4, 1871
Recent American and Foreign Patents- November 4, 1871
Answers to Correspondents- November 4, 1871
Official List of Patents- November 4, 1871
Departments
Correspondence- November 4, 1871
New Books and Publications- November 4, 1871
Business and Personal- November 4, 1871
