American telegraphy and encyclopedia of the telegraph; systems, apparatus, operation (1909)
Maver, William, jr. [from old catalog] · New York, Maver publishing company · leaf 640
necables it is very necessary that great care should be used in making joints, inasmuch as they are conceded to be the weak pointsof all cables. When joints are made inthe factory it is easier to test them thanwhen made under the conditions accompany-ing the laying of the cables underground… … TESTING JOINTS. indicated in Fio-. in which vessel filled Avith salted water; kk is a revers-ing key ; B is a battery of 50 or 100 volts or more, g is a galvanometer, the ionsfaut ofwhich has been ascertained in the usual way. c is the cable,having one of its endsconnected to galvanometer, and its…
Telegraph
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