INTKNSIFIEK. 



and the pumping ceases. The second tappet performs the 

 converse operation of starting the pumps when the load 

 falls below a certain -point. 



FIG. 23. Hydraulic Intensifier. 



29. Intensifier. This mode of providing a supply of 

 high-pressure water may be used when there is no 

 mechanical power available, and at the same time there is an 

 abundant supply of water at a comparatively low pressure. 

 The general arrangement of the intensifier is shown in the 

 accompanying diagram, Fig. 23. A is a cylinder of large 

 diameter, say 2 ft. 6 in., in which a piston, B, works. The 



