[328]. Post and jib in one piece, usually of wrought iron. A balance weight is fixed at A to balance the overhanging jib.

[329]. Swing derrick crane, generally of wood. The jib turns three-fourths of a circle, and the two guys are fixed at an angle of 90° apart, and well secured by anchoring or loading, often made with very long jib for builder’s work.

[330]. Wharf crane, with centre tension bolt instead of crane post. In this arrangement there is a vertical tension on the centre bolt and thrust on the foot of jib.

[Larger plate.]

[331]. Warehouse wall crane.

[332]. Warehouse wall crane, with high jib-head.

[333]. Whip crane, chiefly used in goods sheds. The barrel is sometimes worked by an endless handrope as shown, and sometimes by a second rope and drum with a hand crank as [No. 1209].

[334]. Portable hand crane, with balance weight. The balance weight can be shifted in or out to balance the load.

[335]. Foundry crane, sometimes with travelling carriage on the jib, as [No. 336].