[MBN002033], Technical Note, Thomas Alva Edison, Charles Batchelor, February 12th, 1877
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Title
[MBN002033], Technical Note, Thomas Alva Edison, Charles Batchelor, February 12th, 1877
Editor's Notes
Speaking telegraph -- Bell's imperfect - felt better to get variable resistance by the volume of the voice -- made two insts transmitter and receiver and describes them also another plan -- uses black lead -- annotate with other material from TI and notebooks from this month including v. 11:8 [11:226 a Doc] and 3:681, 921, 923
Mentioned
Date
1877-02-12
Type
Subject
Folder/Volume ID
MBN002-F
Microfilm ID
90:673
Document ID
MBN002033
Publisher
Thomas A. Edison Papers, School of Arts and Sciences, Rutgers University