Features
The Money Value of Education
Photo-Mechanical Printing
Improvements at the Mouth of the Mississippi
What is the Cause of Tides?
Motion on a Moving Body
A Curious Ocular Illusion
Smith's Improved Whiffletree Hook
Stockley's Improved Anti-Primer
Whipple's Improved Clothes Dryer
A New Locking Bolt
Improved Electric Lamp Lighter
Practical Mechanism
Movable Fronts for Buildings
Improved Rotary Pump
The Solanum Crinitum
Growing Orchids
Car and Carriage Springs
Recent American and Foreign Patents - May 1, 1875
Communications Received - May 1, 1875
Departments
- Letters
Correspondence - May 1, 1875
- Recommended
New Books and Publications - May 1, 1875
- Departments
Notes and Queries - May 1, 1875
Business and Personal - May 1, 1875
Index of Inventions - May 1, 1875
