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[E1862AQ1], Letter from John A Hanley to Thomas Alva Edison, May 22nd, 1918

Title: [E1862AQ1], Letter from John A Hanley to Thomas Alva Edison, May 22nd, 1918
Author: Hanley, John A
Recipient: Edison, Thomas Alva
Date: 1918-05-22
Type: Letter
Subject: Testing and quality control; Sound and acoustics
Folder ID: E1862-F
Microfilm ID: 270:566
Document ID: E1862AQ1
URL: https://edisondigital.rutgers.edu/document/E1862AQ1
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 270