Features
Crossing the Boundary of the Experimental Evidence
Foreign Exhibitors at the Centennial
The Metallurgy of Iridium
A Variable Screw
American Porcelain
The New Revelations of a Snow Flake
The Fireman's Respirator
Improved Lewis
A New Steam Launch
A Three-Wheeled Omnibus
Scientific and Practical Information
Improved Center Draft Tongue for Reapers and Mowers
Reid's Automatic Hatchway
Improved Mining Dial
Improved Pipe Joint
The Crane
The Volume and Weight of Distilled Water at Different Temperatures
Recent American and Foreign Patents - March 20, 1875
Decisions of the Courts - March 20, 1875
Canadian Patents - - March 20, 1875
Communications Received - March 20, 1875
Departments
- Departments
Business and Personal - March 20, 1875
Notes and Queries - March 20, 1875
Index of Inventions - March 20, 1875
