[NS7704ZCO], Technical Note, James Adams, Thomas Alva Edison, April 12th, 1877
https://edisondigital.rutgers.edu/document/NS7704ZCO
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Title
[NS7704ZCO], Technical Note, James Adams, Thomas Alva Edison, April 12th, 1877
Editor's Notes
Sexty increase and decrease (and I quote Keith:) "impossibly" multiple lever; I think rawhide on a ssmall platina diaphragm would be best thing for EMGraph with acoustic
Author
Date
1877-04-12
Type
Folder/Volume ID
NS7704-F
Microfilm ID
7:709
Document ID
NS7704ZCO
Publisher
Thomas A. Edison Papers, School of Arts and Sciences, Rutgers University