Features
Charles Pratt
Defenseless Condition of our Seaports
Dr. Edward Maynard
New Method of Chamfering Stone
An Improved Wrench
Open Column Manometer on the Eiffel Tower
Improvement in Jack-Screws
Ancient Methods of Drawing Water
Castrography
Departments
- Letters
Correspondence- May 16, 1891
- Recommended
New Books and Publications- May 16, 1891
- Departments
Recently Patented Inventions- May 16, 1891
Notes and Queries- May 16, 1891
Business and Personal- May 16, 1891
Index of Inventions- May 16, 1891
