American telegraphy and encyclopedia of the telegraph; systems, apparatus, operation (1909)
Maver, William, jr. [from old catalog] · New York, Maver publishing company · leaf 180
the current 5,000 times, (as evidenced by the diminished deflection). Hence theknown resistance, 100,000 X 5,000 = 500,000,000 obms, as before. The usual connections for this test are outlined in Fig. 124, in which g is the gal-Tanometer; i k is a reversing key; c is a cable, or line wire (the… … lo WMV\i—\ i ^ known resistance, may be alternately placed in circuit with the galvanometer, asdesired. If it is a cable that is undergoing test the cojiducior of the cable is connectedto the switch, as in the fignre. ^. v The reversing key has several functions, namely, to place the batte.y…
Telegraph
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