10S0

THEORY AND PRACTICE OF ENGINEERING.

Boor II.

resembling that of working a saw, to the bottom part of the machine, and which drawsbackwards and forwards by means of other connecting arms the saw which is to operateon the pile.

By a reference to the plan, we see the saw in its position after it has cut the head of the

Fig. 1652.

pile partly through; at the back of the semicircle which holds it is a straight rod, whichis made to slide along a straight groove; motion isgiven to this rod backwards and forwards

Fig. 1663.