[NS7802K], Technical Note, Thomas Alva Edison, Charles Batchelor, July 2nd, 1878
https://edisondigital.rutgers.edu/document/NS7802K
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Title
[NS7802K], Technical Note, Thomas Alva Edison, Charles Batchelor, July 2nd, 1878
Editor's Notes
megaphone (telephonoscope)
Date
1878-07-02
Type
Folder/Volume ID
NS7802-F
Microfilm ID
7:768
Document ID
NS7802K
Publisher
Thomas A. Edison Papers, School of Arts and Sciences, Rutgers University