... up " required. The " Insley " excavator.-Another unusual machineused on this work was the " Insley " excavator. This is generally similar t o other mechanical excavators, withthe exceptionthat thecab is fixed to theunder-frame and caterpillar tracks,andthejibisoperatedindependently,as shown in Fig. 9...

..., switch-house, and sack- store, being builtentirely of reinforcedconcrete.Thedetails given of the concrete work include descriptions of two Insley towers used for the hoisting of concrete. Special attention was paid to the shuttering toreduce unnecessary expense, although all the shuttering employed...