3480036 Diagram of quadruplex repeating telegraph system, 1879; (add.info.: Diagram of quadruplex repeating telegraph system, 1879. Fig. 161 shows a plan of connecting the apparatus at a station forming the common terminus of two quadruplex circuits; so as to repeat from one into the other. We \'will suppose the station to be Cleveland; and that L1 represents a quadruplex wire extending from that point to Buffalo; a distance of 183 miles; and L2 a similar wire between Cleveland and Cincinnati; a distance of 250 miles.); Universal History Archive/UIG; out of copyright.