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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.
In 1866, Western Union acquired the American Telegraph Company & the United States Telegraph Company, its two main competitors, gaining a virtual monopoly over the American telegraphy industry. The company also began to develop new telegraphy-related services beyond the transmission and delivery of telegrams, launching the first stock ticker in ...
A 1908 publication by the U.S. Department of the Navy listed on-shore and off-shore wireless telegraph stations of the world. It included a list of shore stations of the world (by country), a list of merchant vessels (by ship line), as well as United States Army, United States Navy, and United States Revenue Cutter Service stations and vessels. [9]
Monument in downtown Salt Lake City, Utah, marking the approximate location where the first transcontinental telegraph line was completed.. The first transcontinental telegraph (completed October 24, 1861) was a line that connected the existing telegraph network in the eastern United States to a small network in California, by means of a link between Omaha, Nebraska and Carson City, Nevada ...
Initially these telegraph lines were only constructed for temporary use because of the brittle exposed copper wire that was used. But, after insulated wire began to be used, permanent lines were built. The Telegraph Construction Corps would load a coil of this wire on a mule's back and lead it straight forward to unreel the wire.
Transatlantic telegraph cables were undersea cables running under the Atlantic Ocean for telegraph communications. Telegraphy is an obsolete form of communication, and the cables have long since been decommissioned, but telephone and data are still carried on other transatlantic telecommunications cables .
In many countries, this situation continued after the introduction of the electric telegraph. Starting in Germany and the UK, electric telegraph lines were installed by railway companies. Railway use quickly led to private telegraph companies in the UK and the US offering a telegraph service to the public using telegraph along railway lines.
The 1857 cable only operated intermittently for a few days or weeks before it failed. The study of underwater telegraph cables accelerated interest in mathematical analysis of very long transmission lines. The telegraph lines from Britain to India were connected in 1870. (Those several companies combined to form the Eastern Telegraph Company in ...