Transactions . , fe. Fir;. 45. - ArmstrongSide-tip WagonsDock (Tuamis). suspended type of coal-hoist (end-tip orNorth London Railway Company, Poplar COAL-SIIIPMEXT AND THE LAYIXG-OUT OF STAITHE HEADS. 205 as to balance the weight of the cradle and tipping frame, thecentral cylinder being that in communication with the workingvalves. The tipping machines for each hoist consist of ahydraulic cylinder fixed to the framing with plunger, cross-Jiead, guide-bars, multiplying sheaves, and two chains attached

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