Features
Improved Canal Boat
Iron Minium
Report of the Secretary of the Interior
Report of the Secretary of the Navy
Further Extracts from Professor Tread-Well on Hooped Cannon
Report of the Secretary of the Treasury
Chemicals Lectures by Prof. Doremus
Special Notice
Miscellaneous Summary
Lunkenheim's Globe Valve
Making Molasses From Corn
What Can be Done for Inventors--Advice Gratis and Advice for Pay
What Can be Found in the Scientific American
Boiler Explosions No Mystery
Prosperity of the Woolen Manufacture
Rams
Fessenden on the Currency
Recent American Patents
Patent Claims
Departments
- Departments
Correspondence
Notes and Queries
