Chap. XIT.

CRANES , ETC.

1009

The crane used by Perronet at the construction of the bridge at Neuilly was also exceed-ingly simple . it was of timber, and worked by two wheels, one man at each wheel being

fumuui u lwh i n n 11 tuiirmii i fijii U ry nn Tan i n icff

-Mniinmi cainn'n nuuim.TBffliHIlUnLHH IIIJ I T 11im

Fig. 1524. perronet’s crane used at nectlly.

sufficient to hoist the various stones used in laying the courses and placing the voussoirsover the arches.

By means of two wheels mounted on a plane, the stones were lifted from the wheel

perronet's crane used at kitcilly.

3 T