Ternant, A. L. (Alcide Ludovic), 1832-1884 · London ; New York : G. Routledge and Sons · leaf 174
156 THE TELEGRAPH trough is withdrawn the moment the machine stops. The bitumen-covered cable is made to assume a round shape, by passing through a gauge that throws back the excess of material into the vessel where it is kept melted (fig. 98). The wires used for making cables are generally… … Fig. 97. bituminous composition, ensures the preservation of submarine lines. A cable covered with good iron should support a ton for each pound weight of iron in a yard of its length. The numbers of wires used always range between 9 and 18, and 10 or 12 wires make a good flexible cable. Near the…
Telegraph
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