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'''Submarine telegraph cables''' are insulated copper cables laid along the bottom of a sea or ocean for telegraphic communication. The first short cable was laid across the [[English Channel]] in 1851. The first successful transatlantic cable was laid in 1866.
== Sources ==
The Earth and Its Peoples A Global History, Bulliet et al, 2005.
[[Category: Telecommunications]]
== Sources ==
The Earth and Its Peoples A Global History, Bulliet et al, 2005.
[[Category: Telecommunications]]