Features
Notes on Military and Naval Affairs
Surface Condensers for Steam Engines
The Chemistry of Coal
The Plan of Creation
History of the Heliographic Art in Europe and America
Trittin's Coal Oil Lamp
Renewed Activity Among Inventors
Steam Rams
Strong Cannon--American Built-Up Guns
What Can Be Done for Inventors--Advice Gratis and Advice for Pay
The Petroleum Region--The Rock Oil Business--The Extent and Sources of Supply
The New Tariff--Development of Our Iron Interest--A Field for Inventors
Patent Claims
Issued from the United States Patent Office
Recent American Inventions
To Our Readers
The Mortar Fleet and Mortars
Departments
- Departments
Correspondence
Notes and Queries
