American telegraphy and encyclopedia of the telegraph; systems, apparatus, operation (1909)
Maver, William, jr. [from old catalog] · New York, Maver publishing company · leaf 639
points where boilers and subway manhole. furnaces encroach on the streets, in vaults and elsewhere. CABLE JOINTING.—After having been drawn into the ducts the conductors of thecables are then jointed. In Fig. 392, which represents a manhole of the Johnstoneconduit system and in which the ducts are… … UNDERGROUND CONDUITS. 527 covered, to ex- of the cable. If of fibrous material the cable will, as a rule, be leadelude moisture. lu that case joints are generally made by carefully connecting theends of two conductors together by a twist joint,which is soldered, lightly. The jointis then covered…
Telegraph
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