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[D8102A], Letter from Mrs M H Bradt to Thomas Alva Edison, March 4th, 1881

Title: [D8102A], Letter from Mrs M H Bradt to Thomas Alva Edison, March 4th, 1881
Editor's Notes: Inquiry about hearing aid or audiphone. TAE marg: "I dropped experimenting on that subject to take up the E Light etc etc."
Author: Bradt, Mrs M H
Recipient: Edison, Thomas Alva
Date: 1881-03-04
Type: Letter
Subject: Sound and acoustics
Folder ID: D8102-F
Microfilm ID: 57:19
Document ID: D8102A
URL: https://edisondigital.rutgers.edu/document/D8102A
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 57