Primary Printed Series -- Other Companies
[CA012-F] Edison Phonoplex System (ca. 1886)
This folder contains printed material relating to Edison's phonoplex system. This system of railway telegraphy devised by Edison in the 1880s combined features of the telegraph and telephone. Related material can be found in D-85-046 and D-86-039 (Document File Series) and in Phonoplex Letterbooks, LM-012 and LM-013 (Letterbook Series).
The following item has been selected: "Edison Phonoplex System of Telegraphy" (ca. 1886)
Courtesy of Thomas Edison National Historical Park.