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[D7801A6C], Letter from Hector Orr to Thomas Alva Edison, April 13th, 1878

Title: [D7801A6C], Letter from Hector Orr to Thomas Alva Edison, April 13th, 1878
Author: Orr, Hector
Recipient: Edison, Thomas Alva
Mentioned: Franklin Institute
Date: 1878-04-13
Type: Letter
Subject: Microphone and other acoustic devices
Folder ID: D7801-F
Microfilm ID: 15:28
Document ID: D7801A6C
URL: https://edisondigital.rutgers.edu/document/D7801A6C
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