Features
Improved Air-Pump
A Lecture on the Iron Navy of Great Britain
Applications for the Extension of Patents
Boating Oil to Market--A “Pond Freshet”
Gun Cotton for Artillery
How to Use Callipers
Preventing Waste of Heat in Boilers
Destructive Effects of Iron Rust
Paying Workmen With Orders
Human Vegetation
Surface Condensers of Marine Engines
California Items
Valuable Work for Inventors, Patentees and Manufacturers
Miscellaneous Summary
Patent Claims
Valuable Receipts
Recent American Patents
To Our Readers
Field's Improved Ice-Creeper
Departments
- Departments
Correspondence
Notes and Queries
