[NS7802F], Technical Note, Thomas Alva Edison, John Kruesi, Charles Batchelor, Martin N Force, George E Carman, June 21st, 1878

Item

Abstract

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

Decade

1870-1879

Identifier

NS7802F

Folder Set

NS7802

Title

[NS7802F], Technical Note, Thomas Alva Edison, John Kruesi, Charles Batchelor, Martin N Force, George E Carman, June 21st, 1878

Microfilm ID

7:757

Publisher

Thomas A. Edison Papers, School of Arts and Sciences, Rutgers University