[LM013549B], Letter from Thomas Alva Edison to Chicago St Paul and Kansas City Railway, S F Armstrong, July 7th, 1887
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Title
[LM013549B], Letter from Thomas Alva Edison to Chicago St Paul and Kansas City Railway, S F Armstrong, July 7th, 1887
Editor's Notes
Rcd yrs of 12th. Send me diagram of what you want to do. "If your wish is to increase your facilities for safety in regard to the running of trains you might be interested in investigating my Phonplex system of Telegraphy, a pamphlet in regard to which I am sending you by this mail. A great deal of delay is caused on Railways through the overcrowding of wires....I am also sending you some letters which we have received in regard to the p ractical operation of Phonoplex telegraphy. This sytem is being universally adopted by all the Railways in the East and South."
Author
Date
1887-07-07
Type
Folder/Volume ID
LM013-F
Microfilm ID
84:822
Document ID
LM013549B
Publisher
Thomas A. Edison Papers, School of Arts and Sciences, Rutgers University