. Western electrician . issued as far back as February 7, 1S51, to A. Uuniont. This clearly describes an exchange systemof dial telegraph instruments, connecting by. short lines withbranch central stations, which branch stations were providedwith trunk lines connecting them with a principal Lockwood remarks that the idea was far ahead of thetimes.—{Tel. Con. Rep., 1SS7, p. 50.) At Newcastle the postoffice arranged a system of con-necting subscribers provided with Wheatstone A B C in-struments. In New York such a system was introduced in1S74 or 1S75. The founder of that system
. Western electrician . issued as far back as February 7, 1S51, to A. Uuniont. This clearly describes an exchange systemof dial telegraph instruments, connecting by. short lines withbranch central stations, which branch stations were providedwith trunk lines connecting them with a principal Lockwood remarks that the idea was far ahead of thetimes.—{Tel. Con. Rep., 1SS7, p. 50.) At Newcastle the postoffice arranged a system of con-necting subscribers provided with Wheatstone A B C in-struments. In New York such a system was introduced in1S74 or 1S75. The founder of that system was not awarethat intercommunicating exchanges had previously had observed the success attending the telegraphing ofstock quotations to subscribers, who each received identicalinformation despatched from a central office, and he as-sumed that a like success might be obtained by furnishinginformation to legal firms as to ihe course of proceedings inthe courts. The legal firms did not take kindly to the idea,. FIG. 3. THREE-PHASE WIRING AND LIGHTING FIXTURESIN CONCORD, N. H.—ONE OF THE EQUALIZING BOARDS. but one of diem offered an alternative suggestion, intimatingthat a system which would enable lawyers to communicatewith each other by telegraph would be worth paying of this idea was obtamed from others, and theresult was the establishment of a telegraph exchange. Asthe exchange was exclusively used by legal firms, the com-pany was called the Law Telegraph company. Telegraphinstruments were subsequently replaced by telephones, andthe particular system adopted for working the exchange be-came known as the Law system. Notwithstanding that this telegraph exchange was alreadyin existence at the time of the invention ol the telephone in1S76, it was not until January, iS/S, that the first commer-cial telephone exchange was started. In the meantime, Bellsinvention had been greatly improved, and shortly afterwardthe introduction on a commercial scale of t
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