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[NM015C], Technical Note, Charles Batchelor, July 6th, 1878

Title: [NM015C], Technical Note, Charles Batchelor, July 6th, 1878
Editor's Notes: megaphone
Author: Batchelor, Charles
Date: 1878-07-06
Type: Technical Note
Subject: Microphone and other acoustic devices
Folder ID: NM015-F
Microfilm ID: 6:743
Document ID: NM015C
URL: https://edisondigital.rutgers.edu/document/NM015C
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 6