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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 earliest true telegraph put into widespread use was the Chappe telegraph, an optical telegraph invented by Claude Chappe in the late 18th century. The system was used extensively in France, and European nations occupied by France, during the Napoleonic era. The electric telegraph started to replace the optical telegraph in the mid-19th century.
1816 telegraph experiment with eight miles of iron wire. Ronalds' most remembered work today is the electric telegraph he created at the age of 28. He established that electrical signals could be transmitted over large distances with 8 miles (13 km) of iron wire strung on insulators on his mother's lawn in Hammersmith.
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.
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 ...
Telegraph use by the public was slow to grow because of high prices [45] but increased after competition drove down prices. This led to the company relocating their London central office to bigger premises in Great Bell Alley, Moorgate, in 1859.
Telegraph service permitted short texts to be sent cheaply and arrive in a matter of minutes to hours, instead of days or weeks. Telegraphy facilitated faster and more profitable freight and passenger railway traffic, consolidated financial and commodity markets, sped political news and commentary, and lowered information costs for companies. [1]
Alexander Graham Bell was a professor of elocution at Boston University and tutor of deaf children. He had begun electrical experiments in Scotland in 1867 and, after emigrating to Boston from Canada, pursued research into a method of telegraphy that could transmit multiple messages over a single wire simultaneously, a so-called "harmonic telegraph".