[D7941ZDA], Letter from Edward Hibberd Johnson to Thomas Alva Edison, July 23rd, 1879
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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
Recipient
Mentioned
Date
1879-07-23
Type
Folder/Volume ID
D7941-F
Microfilm ID
52:641
Document ID
D7941ZDA
Publisher
Thomas A. Edison Papers, School of Arts and Sciences, Rutgers University