ENGINEERING WORKS , ETC . IO47 upon the towers . When the cables pass over the towers there is necessarily a movement of nearly 3 inches , arising from atmospheric changes , but the cables rest in cast - iron saddles which move freely upon rollers interposed between them and … however , if possible , to find a mode of fastening that would give 100 per cent . of the strength of the rope . With this view experi - ments were afterwards made at Clifton on the Canada side of the
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