12/03/1877 Batchelor, Charles, Adams, James and Edison, Thomas Alva -- Technical Notes and Drawings
(Carman, George E; Force, Martin N; Kruesi, John) Cylinder phonograph; Disc phonograph
[NV17]  Notebook Series -- Unbound Notebooks: Vol. 17 (1877-1878)
[NV17022; TAEM 4:891]
Courtesy of Thomas Edison National Historical Park.