Features
Cold Quartz-Mining in California
Miscellaneous Summary
The Slide Valve
Inventive Progress--Past and Future
Manufacture of Coal Oil
Improvements in the Arts and Sciences
Want of American Ocean Steamships
Photogeaphy and Printing
Bosses and Workmen
Recent American Patents
A Tour Among the Iron-Clads
Patent Claims
To Our Readers
Rates of Advertising
Improved Lubricator
Departments
- Departments
New Books and Publications
Notes and Queries
