[NS7802H], Technical Note, Thomas Alva Edison, Charles Batchelor, June 23rd, 1878
https://edisondigital.rutgers.edu/document/NS7802H
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Title
[NS7802H], Technical Note, Thomas Alva Edison, Charles Batchelor, June 23rd, 1878
Editor's Notes
aurophone rule for making cone (proportions - related to horn designs on previous day)
Date
1878-06-23
Type
Folder/Volume ID
NS7802-F
Microfilm ID
7:765
Document ID
NS7802H
Publisher
Thomas A. Edison Papers, School of Arts and Sciences, Rutgers University