Scientific American Magazine
Volume 23, Issue 4You are currently logged out. Please sign in to download the issue PDF.
Features
Iron Bridge at Topeka, Kansas
Strange Drinks
Nickel-Plating--Interesting to Marine Engineers
S. A. Woods' Self-Oiling Circular-Saw Arbors and Adjustable Cone Bushing
Mechanical Fingers
The Hesperians
By Edward C.H. Day the School of Mines, Columbia College
The Scientific Education of Women
Experiments with Gun Cotton
How the Heirs of an Inventor May be Rewarded
Synopsis of the Amended Patent Law - July 23, 1870
The Manufacture of Beet-Root Sugar in England
Friction Matches
Projected Ship Canals
Paper and Paper Stock
Artificial Ultramarine
Scientific Intelligence- July 23, 1870
American Institute Exposition
The Right of Appeal Maintained
Report of the Department of Agriculture for May and June
Recent American and Foreign Patents- July 23, 1870
Applications for the Extension of Patents
Answers to Correspondents- July 23, 1870
Official List of Patents- July 23, 1870
Departments
Correspondence- July 23, 1870
Business and Personal- July 23, 1870
