d by his instrument. We will not undertake to give a complete descrip- tion of the mechanism by which these different re- sults are obtained, but will endeavor merely to explain the principle of the system. All the subscribers are connected with a central station (Fig. 3), where each is represented… … Fig. 1.—DETAILS OF A SUBSCRIBER’S COMMUTATOR AT THE CENTRAL STATION. cumstances, the earth being used as a return cir- tained by means of the third contact pin, is analogous tion (transmitter, P, and receiver, #), a call bell, and cuit. After the use of one wire for the emissions to that which is…
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