Page:Popular Science Monthly Volume 90.djvu/184

 Cable Laying as the Signal Corps Does It

���How a cable looks when its covering is removed. To give it strength each cable is composed of a large number of small steel threads wound and twisted and sometimes inter- woven. No cable is stronger than any one of its threads. Were one thread to break, additional strain would fall on threads adjacent to it causing them to break and finally de- stroying the whole structure of the cable

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