08/27/1875 Batchelor, Charles and Edison, Thomas Alva -- Technical Notes and Drawings
Electric pen and mimeograph; Typewriter
[NE1674]  Notebook Series -- Newark Shop Notebooks: Cat. 1182 Unbound Notebook (1871-1872, 1875)
[NE1674040; TAEM 3:70]
Courtesy of Thomas Edison National Historical Park.