Electrical news and engineering . winch will grea ise the carrying capacity of long distance telephone and telegraphwires. By the new system, four telephone conversation wires can be carried on simultaneously,dition t the conversation carried on ordinarily, make all : w ires can also be utili forty simultan THE ELECTRICAL NEWS January 15, 1919. - ^tam ___ ,.. _

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Keywords: ., bo, bookcentury1800, bookdecade1890, bookidelectricalnewsen28donm