[N051195], Technical Note, Thomas Alva Edison, May 21st, 1880
https://edisondigital.rutgers.edu/document/N051195
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Title
[N051195], Technical Note, Thomas Alva Edison, May 21st, 1880
Editor's Notes
schematic drawing of recording/playback device for incoming telephone messages (see Mott jrnl May 17). 509--small sketches of RR engine friction wheel?
Author
Date
1880-05-21
Type
Folder/Volume ID
N051-F
Microfilm ID
33:508
Document ID
N051195
Publisher
Thomas A. Edison Papers, School of Arts and Sciences, Rutgers University