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Edison Phonoplex System Of Telegraphy

An original brochure covering a system of telegraphy in use by railroads

Designation: EPH-PHO
No.: 1833
Author/Owner/Source: Edison Phonoplex, NY
Pub. Date: 1892
Description: Size: 6×9, 38 pgs.
Language: Eng
Source: Polan
Loan/Own: Gift
Entry Date: 9/8/2013
No. docs.: 1