MANUAL FOR SUGAR GROWERS. 



79 



equally in all directions, and thus if in any one 

 place a pressure of say one ton per square inch 

 be applied, then a pressure of one ton per square 

 inch will be exerted at ev- 

 ery part of its surface. If, 

 then, weights be applied 

 to the fluid in the vessel 

 A until the pressure is one 

 ton per square inch, and 

 the vessel A is connected 

 with a second vessel, B, by 

 means of a pipe, then ev- 

 ery part of the sides of the vessel A, of the pipe, and 

 of the sides of the vessel B, will also be subjected to 

 a pressure of one ton per square inch. Now, if in B 

 there be a piston moving freely, the piston, too, will 

 share the pressure. Suppose the area of the piston 

 to be twelve square inches, then the piston will have 

 a pressure of twelve tons exerted upon it. If, now, 

 the piston be made to press upon the rollers, the 



FIG. 12. Principle of hydraulic 

 press. 



FIG. 13. Diagram of hydraulic attachment to cane-mill. 



rollers will be thrust forward with a pressure of 

 twelve tons. How this is applied to the cane-mill 

 will be seen from the diagram, Fig. 13 ; from which 



