03/09/1891 Parmelee, Ed L to Edison, Thomas Alva
(Parmelee, George H) Reminiscences (1850s-1860s); TAE friends and associates; Multiple telegraphy (duplex, quadruplex)
[D9102]  Document File Series -- 1891: (D-91-02) Edison, T.A. -- General
[D9102ABB; TAEM 130:778]
Courtesy of Thomas Edison National Historical Park.