Features
On Scientific Experiments in Balloons
Notes on New Discoveries and New Applications of Science
The New Method of Obtaining Oxygen
American Annual Cyclopedia
Recent American Patents
Industrial Exhibition in Germany
Keeping Cistern Water Sweet
Leather Belts
Eight Hour System--The Way to Get it
Good Workmanship
Patent Claims
Issued From The united States Patent-Office
To Our Readers
Patent Agency Office
Departments
- Departments
Correspondence
Notes and Queries