Features
Mr. Cramp the Shipbuilder, Replies to his Critics
The New York Water Supply--A Great Dam Decided Upon
Position of the Planets in February
The Unicycle Elevated Railway
An Improved Tappet
A Swing Readily Adjustable for Height
How Heron Solved It
A Device for Reaching High Shelving
The Belt Problem
The Canet System of Firing Torpedoes
Scientific American Building Edition- January 31, 1891
Books on Electricity
Mechanical Drawing
The Scientific American Supplement
The Scientific American- January 31, 1891
Experimental Science- January 31, 1891
Departments
To Inventors- January 31, 1891
- Letters
Correspondence- January 31, 1891
- Departments
Miscellaneous Notes
Recently Patented Inventions- January 31, 1891
Index of Inventions- January 31, 1891
Business and Personal- January 31, 1891
Notes and Queries- January 31, 1891
