Features
The Dayton Cam Pump
The Depression in the Iron Trade
The Sewing Machine Monopolists Again at Work
Glacial Remains in Central America
Scientific and Practical Information - May 16, 1874
Dead Subjects and a Live Discussion
Oleomargarin
Improved Lard and Butter Cutter
An Inexhaustible Inkstand
The Colorado Potato Bug
The Shadow Sail
Strain Diagrams and their Revelations
Proceedings of the National Academy of Science
The Niagara Direct and Double Acting Pump
Improved Automatic Packing and Weighing Machine
Modern Egyptian Gardens
The Bow and Stern Screw Propeller
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
- Letters
Correspondence - May 16, 1874
- Recommended
New Books and Publications - May 16, 1874
- Departments
Business and Personal - May 16, 1874
Index of Inventions - May 16, 1874
