SUGAR BOILING AND CRYSTALLIZATION-IN-MOTION 405 



Referred to four days' capacity with massecuite of 55 purity and of 93 

 Brix occupying 23-501. ft. per ton, and with 100 tons of juice per ton of cane, 

 the following general formula may be obtained : Cubic feet per ton-cane- 

 hour = 2,200 X g.s. per cent. (0-00524 0-00024 (P ~ 75)} where g.s. is 



FIG. 252 



the gravity solids in the juice and p is the polarization gravity purity. 

 If, for example, there are 100 tons of cane giving the same quantity of juice 

 of 15 per cent, gravity solids and of 80 purity, there will be required 13,332 

 cu. ft. or 133 cu. ft. per ton-cane-hour. The design must allow, however, 



FIG. 253 



lor the most adverse conditions, such as h ; gh Brix and low purity, as may 

 result from burnt cane, and generally, in the absence of a detailed knowledge of 

 local conditions, it is not advisable to install less than 150 cu. ft. per ton-cane- 

 hour. Each crystallizer should hold one full pan strike, and if four pans be 



