08/02/1875 Batchelor, Charles and Edison, Thomas Alva -- Technical Notes and Drawings
Electric pen and mimeograph
[NE1676]  Notebook Series -- Newark Shop Notebooks: Cat. 1172 Bound Notebook (1871-1872, 1874-1875)
[NE1676259; TAEM 3:156]
Courtesy of Thomas Edison National Historical Park.