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[D7801A8F], Letter from R R Day to Thomas Alva Edison, May 4th, 1878

Title: [D7801A8F], Letter from R R Day to Thomas Alva Edison, May 4th, 1878
Author: Day, R R
Recipient: Edison, Thomas Alva
Date: 1878-05-04
Type: Letter
Subject: Microphone and other acoustic devices
Folder ID: D7801-F
Microfilm ID: 15:51
Document ID: D7801A8F
URL: https://edisondigital.rutgers.edu/document/D7801A8F
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 15