07/29/1918 Edison, Thomas Alva -- Diaries and Journals
(Howell, John White; Miller, John Vincent; Ott, Frederick Paul; Archer, Walter Nadler; Ott, Ludwig Fredrick; Dinwiddie, William Walter) Phonoplex and railroad telegraphy; Electric battery; Disc recordings
[NP113]  Notebook Series -- Pocket Notebooks: PN-18-04-01 (1918)
[NP113136; TAEM 244:234]
Courtesy of Thomas Edison National Historical Park.
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