Features
The Colorado Potato Bug
Work for Arctic Explorers
Instability of the Earth's Surface
The Keely Motor Deception
The Power of Small Engines
Improved Engraving Machines
The Electric Light
Improved Railway Track
Improved Fire Box for Locomotive Furnaces
Knebworth Park, Hertfordshire, England
Recent American and Foreign Patents - July 17, 1875
The Song of Steam
The Irish-American Rifle Contest
Canadian Patents - July 17, 1875
Communications Received - July 17, 1875
Departments
- Letters
Correspondence - July 17, 1875
- Departments
Business and Personal - July 17, 1875
Notes and Queries - July 17, 1875
Index of Inventions - July 17, 1875
