[NS7802G], Technical Note, John Kruesi, Thomas Alva Edison, June 22nd, 1878
https://edisondigital.rutgers.edu/document/NS7802G
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Title
[NS7802G], Technical Note, John Kruesi, Thomas Alva Edison, June 22nd, 1878
Editor's Notes
auriphone for the deaf (helmholz resonater ear trumpets) -- magnaphone
Author
Date
1878-06-22
Type
Folder/Volume ID
NS7802-F
Microfilm ID
7:762
Document ID
NS7802G
Publisher
Thomas A. Edison Papers, School of Arts and Sciences, Rutgers University