Features
A Propelling Mechanism for Vehicles
An Improved Wrench
A Quilter for Sewing Machines
A Readily Applied Car Replacer
A Tool Holder for Lathes, Planers, Etc.
Fireproof Partition Walls
A Mechanical Stoker
The Patent Centennial
Optical Projection of Opaque Objects
A SuccessfuI Life
To Inventors
Useful Books!– April 4, 1891
Advertisements- April 4, 1891
Inside page, each insertion — 75 cents a line Back page, each insertion — $1.00 a line
The Scientific American Publications for 1891- April 4, 1891
Experimental Science- April 4, 1891
The Scientific American Established 1846- April 4, 1891
The Most Popular Scientific Paper in the World
Departments
- Letters
Correspondence- April 4, 1891
- Recommended
New Books and Publications- April 4, 1891
- Departments
Miscellaneous Notes- April 4, 1891
Recently Patented Inventions- April 4, 1891
Business and Personal- April 4, 1891
Notes & Queries- April 4, 1891
Index of Inventions- April 4, 1891
