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[D7941ZDA], Letter from Edward Hibberd Johnson to Thomas Alva Edison, July 23rd, 1879

Title: [D7941ZDA], Letter from Edward Hibberd Johnson to Thomas Alva Edison, July 23rd, 1879
Editor's Notes: Call bell battery problems. Resistance of bell mags too low. Will try 100 ohms. If this successful, will change magnets on all switchboards. Describes expts.
Author: Johnson, Edward Hibberd
Recipient: Edison, Thomas Alva
Mentioned: Gouraud, George Edward
Date: 1879-07-23
Type: Letter
Subject: Telephone; Electric battery; Electricity and magnetism
Folder ID: D7941-F
Microfilm ID: 52:641
Document ID: D7941ZDA
URL: https://edisondigital.rutgers.edu/document/D7941ZDA
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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