Rutgers, The State University of New Jersey
Edison, Thomas Alva
-- Lists and Inventories
Exhibition. Philadelphia Centennial (1876)
) Expositions, demonstrations, lectures; Multiple telegraphy (duplex, quadruplex); Automatic telegraphy [Marginalia by Batchelor, Charles]
[LB001] Letterbook Series -- General Letterbooks: LB-001 (1875, 1877-1878)
[LB001003; TAEM 28:5]
Courtesy of Thomas Edison National Historical Park.