Features
Pressure Not a Motive Power
Why do Plants Absorb Oxygen during the Night?
Governors for Prime Movers
The American Social Science Congress
Milk as a Diet and Its Effect on the System
The Respiration of Oxygen
The Polar Clock--The Time of Day Shown by Colors
Hydraulic Riveting Machine
Improved Miter Machine and Frame Vise
Todd's Improved Horseshoe
Jenkins' Patent Compound Hatchet
Improved Doubletree
The Seaforthia Elegans
Recent American and Foreign Patents - May 30, 1874
Bursting of a Mountain Water Reservoir in Massachusetts--A Terrible Calamity
Answers Correspondents - May 30, 1874
Communications Received - May 30, 1874
Canadian Patents - May 30, 1874
Departments
- Letters
Correspondence - May 30, 1874
- Recommended
New Books and Publications - May 30, 1874
- Departments
Business and Personal - May 30, 1874
Index of Inventions - May 30, 1874
Patents - May 30, 1874
