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[E1565HE], Letter from Zachariah Power Halpin to Thomas Alva Edison, May 15th, 1915

Title: [E1565HE], Letter from Zachariah Power Halpin to Thomas Alva Edison, May 15th, 1915
Author: Halpin, Zachariah Power
Recipient: Edison, Thomas Alva
Date: 1915-05-15
Type: Letter
Subject: Testing and quality control; Cylinder phonograph
Folder ID: E1565A-F
Microfilm ID: 263:828
Document ID: E1565HE
URL: https://edisondigital.rutgers.edu/document/E1565HE
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 263