No response due today. Please review material on the telegraph in CIH pp. 102-11, and especially James Carey's dense and provocative essay "Time, Space, and the Telegraph" (CIH 125-131)
There is a nice webpage on the optical telegraph here.
For a modern take on one of the principle effects of the telegraph (the sundering of "transmission" and "transportation") see Nicholas Negroponte on "Bits and Atoms"