American telegraphy and encyclopedia of the telegraph; systems, apparatus, operation (1909)
Maver, William, jr. [from old catalog] · New York, Maver publishing company · leaf 262
be-tween the key closed and open. This we shall see it does. In Figs. 176, 177, 178 themain and artificial lines aresupposed to have a resistanceof 1800 ohms each. The jointresistance of those circuitsfrom J would then be 900ohms. In Fig. 176 the only otherresistance in the circuit isthe 600 ohms,… … vML. § fSOO circuit, up to j, of .15 ampere (/. e. -yHq = .15).between al and ml, each wire taking .075 amperes. Counting from j to the ground, via r and the dynamo d, it is seen that theresistance is 600 ohm?. Referring now to Fig. 177, in which t is open, we find that the resistance ofthe circuit…
Telegraph
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