Specifications for the multiplex printing telegraph system : theory and operation (1920)
Western Union Telegraph Company · [New York?] : The Company · leaf 21
ML=LINE WIRE =1550 Hg>- .~@- P4=B0v/ Fig. 9 … 80v.=Pj 17. So far it has been assumed that it merely is necessary for the artificial line ateach station to have a resistance equal to that of the main line plus the apparatus atthe distant station. This is seldom, if ever, the whole truth. Every line wire, in addi-tion to its current-carrying…
Telegraph
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