[NS7802F], Technical Note, Thomas Alva Edison, John Kruesi, Charles Batchelor, Martin N Force, George E Carman, June 21st, 1878
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Title
[NS7802F], Technical Note, Thomas Alva Edison, John Kruesi, Charles Batchelor, Martin N Force, George E Carman, June 21st, 1878
Editor's Notes
valve for aerophone -- more formal -- followed by sketch for use as fog signal using explosive gas in chamber -- followed by aurophone horn designs -- followed by microphone design -- followed by auriphone (megaphone or rather auriphone)
Date
1878-06-21
Type
Folder/Volume ID
NS7802-F
Microfilm ID
7:757
Document ID
NS7802F
Publisher
Thomas A. Edison Papers, School of Arts and Sciences, Rutgers University