Scientific American Magazine
Volume 30, Issue 20You are currently logged out. Please sign in to download the issue PDF.
Features
The Hamilton Surface Planer
The Dayton Cam Pump
The Sewing Machine Monopolists Again at Work
The Depression in the Iron Trade
Glacial Remains in Central America
Oleomargarin
Dead Subjects and a Live Discussion
Scientific and Practical Information - May 16, 1874
An Inexhaustible Inkstand
The Shadow Sail
The Colorado Potato Bug
Improved Lard and Butter Cutter
Strain Diagrams and their Revelations
Proceedings of the National Academy of Science
Improved Automatic Packing and Weighing Machine
The Niagara Direct and Double Acting Pump
The Bow and Stern Screw Propeller
Modern Egyptian Gardens
Recent American and Foreign Patents - May 16, 1874
Answers to Correspondents - May 16, 1874
Communications Received - May 16, 1874
Canadian Patents - May 16, 1874
Departments
Correspondence - May 16, 1874
New Books and Publications - May 16, 1874
Business and Personal - May 16, 1874
Index of Inventions - May 16, 1874
