07/15/1874 Operator -- Articles
(Western Union; Phillips, Walter Polk; Hunter, William, (Western Union); Prescott, George Bartlett; Brown, Alfred S; Mixer, Charles H; Edison, Thomas Alva; Orton, William) Multiple telegraphy (duplex, quadruplex)
[PA2]  Published Works and Other Writings: Published Works (1878-1898)
[PA060; TAEM 0:0]