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Earth-return telegraph is the system whereby the return path for the electric current of a telegraph circuit is provided by connection to the earth through an earth electrode. Using earth return saves a great deal of money on installation costs since it halves the amount of wire that is required, with a corresponding saving on the labour ...
The Electric Telegraph: A Social and Economic History. David and Charles. ISBN 0-7153-5883-9. OCLC 655205099. Mercer, David, The Telephone: The Life Story of a Technology, Greenwood Publishing Group, 2006 ISBN 031333207X; Schwoch, James (2018). Wired into Nature: The Telegraph and the North American Frontier. University of Illinois Press.
The Electric Telegraph: An Historical Anthology (1977) Smethers, J. Steven. "Pounding Brass for the Associated Press: Delivering News by Telegraph in a Pre-Teletype Era." American Journalism 19.2 (2002): 13-30. Sussman, Gerald. "Nineteenth-century telegraphy: Wiring the emerging urban corporate economy." Media History 22.1 (2016): 40–66.
January 22, 1848 map in New York Herald showing extent of existing and planned North American telegraph lines. At this time, the service area for the United States reached Petersburg, Virginia in the south, Portland, Maine in the northeast, Cleveland, Ohio in the northwest, and as far west as East St. Louis, Illinois.
COLLEVILLE-SUR-MER, France (AP) — World War II veteran Jake Larson, a 100-year-old American best known on social media under the name “Papa Jake," enjoyed giving hugs to the many fans he met ...
Once it was known that Tawell had boarded a train to London, the telegraph was used to signal ahead to the terminus at Paddington and have him arrested there. The novelty of this use of the telegraph in crime-fighting generated a great deal of publicity and led to increased public acceptance and use of the telegraph.
So along comes Jake Knapp, whom I’d never heard of before Sunday. He is a 29-year-old Californian, a PGA Tour rookie, and he just won his first golf tournament. The big cardboard check said ...
Telephone magneto viewed from beneath shows the armature (inset, left) and the horseshoe field magnets, and the gears to drive the rotor. A telephone magneto is a hand-cranked electrical generator that uses permanent magnets to produce alternating current from a rotating armature.