The telegraph is still in use but it has evolved and is in use in specialized circumstances. The telephone which was invented in 1876 would have gradually replaced the telegraph in commercial usage.
http://en.wikipedia.org/wiki/Telegraphy
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what did the first telegraph look like?
Welll.... the telegraph replaced the pony express then the telephone replaced the telegraph. and now a days texting has replaced the telephone.
devices for telegraph he made inprovments in tecnology he invented cuplox telegraph electric pen for telegraph inprovments in telephone tec
because telegraph wires were poles along the railroad tracks
The telegraph was used in World War 1 to send orders from one location to another. During WWI Britain's telegraph were uninterrupted.