Features
Herschel, Tyndall, and Draper on the Sun Ray
Patent Monopolies in Congress
Slippery Pavements
To New Subscribers
Whitworth Steel
A Paper and Glass Debate
Scientific and Practical Information - February 28, 1874
Hilf's Iron Permanent Way
Improved Movable Teeth for Saws
On the Purification of Mercury
Pipe Cutting and Threading Machine
Improved Trench Braces
Casement's Improved Method of Burning Fuel
How Shall I Introduce my Invention?
Decisions of the Courts - February 28, 1874
Recent American and Foreign Patents - February 28, 1874
Answers Correspondents - February 28, 1874
Communications Received - February 28, 1874
Canadian Patents - February 28, 1874
Departments
- Letters
Correspondence - February 28, 1874
- Departments
Business and Personal - February 28, 1874
Index of Inventions - February 28, 1874
