American telegraphy and encyclopedia of the telegraph; systems, apparatus, operation (1909)
Maver, William, jr. [from old catalog] · New York, Maver publishing company · leaf 644
hange in the deflection that may be caused by the vari-ation of the resistance of the defect in passing on to the drum. When such an indica-tion is manifested the suspected spot is beaten with a wooden mallet to further de-velop the dpfect if it exists at that point. LOCATING FAULTS IN SHORT… … A shore end of the defective conductor of the cable is connected with a galvanom-eter and battery, as in Fig. 397. A flat boat, with a set of rollers or ^^lleys on itsdeck, having been provided, a portion of the cable near one of the shores is lifted onthe boat and placed in position on the…
Telegraph
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