Inventor Name
Struble, Jacob B.
Repository
Pennsylvania State University
Special Collections Library
104 Paterno Library
University Park, PA 16802-1808
814-865-7931
http://www.libraries.psu.edu/speccolls/index.htm
Physical Description
26 leaves
Summary
Photocopies of material regarding Struble’s invention of the electric block system in switching for the railroads.