[MBN002039] Technical Note, June 6th, 1877
https://edisondigital.rutgers.edu/document/MBN002039
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Title
[MBN002039] Technical Note, June 6th, 1877
Editor's Notes
Improved speaking telegraph better than Bell's -- EMG receiver -- uses compressed plumbago for variable resistance
Author
Mentioned
Date
1877-06-06
Type
Subject
Folder/Volume ID
MBN002-F
Microfilm ID
90:676
Document ID
MBN002039
Publisher
Thomas A. Edison Papers, School of Arts and Sciences, Rutgers University