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

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)
Author: Carman, George E; Force, Martin N; Batchelor, Charles; Kruesi, John; Edison, Thomas Alva
Date: 1878-06-21
Type: Technical Note
Subject: Microphone and other acoustic devices
Folder ID: NS7802-F
Microfilm ID: 7:757
Document ID: NS7802F
URL: https://edisondigital.rutgers.edu/document/NS7802F
Rights: Thomas Edison National Historical Park
Publisher: Thomas A. Edison Papers, School of Arts and Sciences, Rutgers University
Has Version: Archive.org Viewer, Microfilm Series Reel 7

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