Features
On Flying Machines
Miscellaneous Summary
The Steam Engine Indicator
The Children of Mechanics
Spaulding's Patent Broom Head
A Strange Inconsistency
The Heated Term--How to Keep Cool
Important Decision in Interference Case
The Markets
Our Commercial Marine
The Needle Gun
The Production of Timber
Importance of Bags
Patent Claims
Issued from the U. S. Patent office
Departments
- Departments
Correspondence
New Inventions
Notes and Queries
