MANUAL FOR SUGAR GROWERS. 



83 



at the other. The following diagram will help to 

 make this clear : 



Fig. 14.— Diagram of diffusion-battery. 



A, B, C, D, E are five diffusion - vessels. E has 

 jtist been filled with fresh chips, while the chips in 

 A are nearly exhausted. Hot water is forced into 

 A, thence it passes into B, then into C and D, and 

 finally comes in contact with the fresh chips in E, 

 after which it is di-awn off to the evaporators. The 

 chips in A, being now exhausted by the fresh water, 

 are discharged, and the vessel, refilled with fresh 

 chips, now becomes the last of the series, the fresh 

 water entering at B, and the diffusion-juice dra^vn 

 off at A, and so on, each vessel becoming alternately 

 first and last of the series. 



The question whether diffusion is to supersede 

 crushing is one which is being most vigorously dis- 



