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Indeed many wireless operators came from the telegraph ranks.- By 1850 most of the basic electrical phenomena had been investigated.- On the first International Telegraph Convention was signed by the 20 participating countries and the International Telegraph Union (later ITU) was set up to enable subsequent amendments to this initial agreement to be agreed upon - First practical wireless by Marconi, 'Hertzian Waves' over two miles! When he read about the experiments of Heinrich Hertz and about Popov's suggestion, he saw the possibility of using these waves as a means of signaling.Marconi realized that his signaling system would be most useful to shipping.publishes an article in the British hobby magazine "The Model Engineer and Amateur Electrician".
It has been subjected to the minutest scientific textual analysis possible to humanity and has been proven to be authentic in every way.By adding a resonant circuit to the arc it would oscillate at a frequency determined by the LC constants.Duddell's arc would only oscillate at audio frequencies, audible to human hearing, and it was dubbed the "singing arc."In 1902 Valdemar Poulsen, succeeded in making the arc oscillate at the higher frequencies by using electrodes operating in a sealed chamber, with hydrocarbon vapor, and a strong magnetic field.Persian Army employs a relay system where soldiers positioned on hilltops shout and relay military messages 30 times faster than by runner.Accounts of flags, mirrors and smoke signals appear in early history. By 1837 the system is improved and was demonstrated using 'lightning wires' and 'Morse code,' an electronic alphabet that could carry messages. A line was constructed between Baltimore and Washington and the first message, sent on May 24,1844, was 'What hath God wrought!
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