[NSUN10], Technical Note, John F Ott, Thomas Alva Edison, 1887
drawings possibly related to generators or motors
[NSUN10-F] Notebook Series -- Unbound Notes and Drawings
https://edisondigital.rutgers.edu/document/NSUN10
Thomas A. Edison Papers, School of Arts and Sciences, Rutgers University
Archive.org Viewer, Microfilm Series Reel 108