Scientific American Magazine
Volume 23, Issue 20You are currently logged out. Please sign in to download the issue PDF.
Features
Tripler's Railroad Tie
Automatic Damper Regulator, Important Patent Decision, and more
Scientific Use of the Imagination
The Power of Modern Skill in the Mechanic Arts
The Great Suspension Bridge between New York and Brooklyn--Progress of the Work--Its Present Condition--Some Account of the Method of Procedure
Blackboards
Hutchinson's Locking Grate Bar
The People Who Attend Fairs
Rating Steam Engines
The World's Work, and Its Moral Necessity
Power of Prime Motors
Death of Three Distinguished Chemists
Transportation of Fresh Meats and Fruits, Etc., through Long Distances--The Davis Refrigerator Car
Chemistry at the Fair of the American Institute
Diamond Mining in South Africa
Applications for the Extension of Patents- November 12, 1870
Answers to Correspondents- November 12, 1870
Recent American and Foreign Patents- November 12, 1870
Official List of Patents- November 12, 1870
Departments
Correspondence- November 12, 1870
Business and Personal- November 12, 1870
