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[NS7802R1], Technical Note, Charles Batchelor, Thomas Alva Edison, September 27th, 1878

Title: [NS7802R1], Technical Note, Charles Batchelor, Thomas Alva Edison, September 27th, 1878
Author: Batchelor, Charles; Edison, Thomas Alva
Date: 1878-09-27
Type: Technical Note
Subject: Health and medicine; Microphone and other acoustic devices
Folder ID: NS7802-F
Microfilm ID: 162:562
Document ID: NS7802R1
URL: https://edisondigital.rutgers.edu/document/NS7802R1
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 162
License: CC0 1.0 Universal