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[D7901A], Letter from Hamilton McKown Twombly to Thomas Alva Edison, May 5th, 1879

Title: [D7901A], Letter from Hamilton McKown Twombly to Thomas Alva Edison, May 5th, 1879
Editor's Notes: "Have heard of an ear trumpet for deaf people you invented can one be obtained?" (telegram)
Author: Twombly, Hamilton McKown
Recipient: Edison, Thomas Alva
Date: 1879-05-05
Type: Letter
Subject: Microphone and other acoustic devices
Folder ID: D7901-F
Microfilm ID: 49:7
Document ID: D7901A
URL: https://edisondigital.rutgers.edu/document/D7901A
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 49