Scientific American Magazine
Volume 31, Issue 4You are currently logged out. Please sign in to download the issue PDF.
Features
Improved Hoisting Machine
Power Required to Drive Cotton Machinery
Cheap Transit for Oil
Morbid Mental Conditions
The Manufacture of Gem Stones
A Switch Accident
Scientific and Practical Information - July 25, 1874
A Safety Furnace
Gang Saw Improvements
Apparatus for Transplanting Trees
Practical Education - July 25, 1874
Earle's Improved Ice Creeper
New Ice Making Process
Improved Furnace for Melting Brass
A Novel Balloon Ascent
The New Steamer Britannic-A New Iropeller Improvement
Decisions of the Courts - July 25, 1874
Recent American and Foreign Patents - July 25, 1874
Answers and Correspondents - July 25, 1874
Communications Received - July 25, 1874
Canadian Patents - July 25, 1874
Departments
Correspondence - July 25, 1874
Bussiness and Personal - July 25, 1874
Index of inventions - July 25, 1874
