Departments
- Letters
Correspondence- December 10, 1892
- Departments
New Books and Publications- December 10, 1892
Recently Patented Inventions- December 10, 1892
Index of Inventions- December 10, 1892
Business and Personal- December 10, 1892
To Inventors- December 10, 1892
Notes and Queries- December 10, 1892