Features
The War
The Polytechnic Association of the American Institute
New Method of Transmitting Simultaneously Two Dispatches on One Wire
Danchell's Tests for Water
Information as to the Patentable Novelty of Inventions
Sir William Armstrong—Is a Patent a Monopoly?
Gold Coming and Going
Trap Quarries—Street Pavements
A New Mode of Locomotion
Our Workshops and the War
Philadelphia Manufactures
English Shipbuilders Still Following Stevens's Floating Battery
New York Markets
Patent Claims - October 5, 1861
Departments
- Departments
Notes and Queries - October 5, 1861
