The telegraph in American and Morse memorial (1886)
Reid, James D · New York, Printed for the author by J. Polhemus · leaf 410
evolve on a pivot, giving the surface anangle of about twenty-five degrees, so as to present its face at rightangles to the eye of the operator. Over the disc thus mounted aneedle or stylus rested, and the writing was executed in graduallydiverging lines, under a guide, until the surface of the… … 38o American Telegraphic History. duced by a main battery at the sending station. No battery was usedat the receiving station in the act of recording. This peculiarity madeit often possible, in the early condition of telegraph lines, to receivemessages by the Bain method when the other systems were…
Morse, Samuel Finley Breese, 1791-1872 · Telegraph
Internet Archive · Northeastern University Library · Public Domain Mark 1.0. Free to use for anything.
