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[D7941ZGK], Letter from Thomas Alva Edison to Edward Hibberd Johnson, October 18th, 1879

Title: [D7941ZGK], Letter from Thomas Alva Edison to Edward Hibberd Johnson, October 18th, 1879
Editor's Notes: "Owing resistance transmitter knock harmless. Regular transmitter, powerful knock eventually destroys chalk, louder chalk quicker destruction. We always used new push hence bug unsuspected. Temporary expedient, new push, reverse chalk holder, polish new groove, gradually. New device allows interruption merely weakens knock."
Author: Edison, Thomas Alva
Recipient: Johnson, Edward Hibberd
Date: 1879-10-18
Type: Letter
Subject: Metals and minerals; Telephone
Folder ID: D7941-F
Microfilm ID: 52:825
Document ID: D7941ZGK
URL: https://edisondigital.rutgers.edu/document/D7941ZGK
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 52

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