The illustration shows the general arrangement of a small pile engine worked by hand power; larger ones are on the same principle. The boiler and winch will depend upon the money available, but a vertical boiler with small winch engine attached will probably be suitable. Oblique piles are driven by canting the pile-engine; the blow of course loses in efficiency according to the amount of cant. For moving the pile-engine about a job on shore, it is usual to lay down a pair of rails and to prise the engine along them. For transportation by water, a barge is the best means, but if by road a lorry, lurrie, or low trolley is usual, the engine being carried erect, if there are no bridges to pass under, and being made fast by guy ropes from the top to the angles of the lorry.

Engine for Pile Driving.

MONKEY.