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[E1770DV], Letter from John Pierrepont Constable to Thomas Alva Edison, May 21st, 1917

Title: [E1770DV], Letter from John Pierrepont Constable to Thomas Alva Edison, May 21st, 1917
Author: Constable, John Pierrepont
Recipient: Edison, Thomas Alva
Date: 1917-05-21
Type: Letter
Subject: Testing and quality control; Disc phonograph; Phonograph equipment and accessories
Folder ID: E1770-F
Microfilm ID: 269:330
Document ID: E1770DV
URL: https://edisondigital.rutgers.edu/document/E1770DV
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 269