Features
Table of Contents of Scientific American Supplement
The United States' Position in a Defensive War
Samuel Plimsoll
Metal as a Substitute for Wood in Railroad Ties
Rotary Press for Printing in Colors
New Tubular Well
Platform for Freight Cars
Theatrical Illusions
The Horse Race on the Stage
Apparatus for Scouring Water-Ways
Scientific American Building Edition- April 25, 1891
To Inventors- April 25, 1891
List of Books on Electricity- April 25, 1891
Useful Books!- April 25, 1891
The New Book Experimental Science
Building Edition- April 25, 1891
The Scientific American
Departments
- Recommended
New Books and Publications- April 25, 1891
- Departments
Recently Patented Inventions- April 25, 1891
Business and Personal- April 25, 1891
Notes and Queries- April 25, 1891
Index of Inventions- April 25, 1891
