HYDRAULIC PRESS. 



163 



That the principle of the equality of work holds here 

 also, may be easily shown. In order to raise the ram 

 through l cm = O m '01, 314 CC of water must be pressed 

 into the larger cylinder; to do this, since the smaller 

 piston has a section of 3 cm *14, it will be necessary to 

 press it downwards through 100 cm = l m . The work 

 >ne by the ram, supposing the pressures to be equal to 



FIG. 113 (> real size). 



hose above mentioned, is 5,000 kgc x CT'Ol = 50 kilo- 

 rammetres, and the work done upon the plunger is 

 0kgr x l m =: 50 kilogrammetres, or the same as that 

 one by the ram. 



It would follow from this that in order to raise the 

 im O m -5 by a single stroke of the plunger, the latter 

 r ould have to descend through 50 m ; such a length of 



it 2 



