SUGAR BOILING AND CRYSTALLIZATIOX-IN-MOTION 405 



Referred to four da\'s' capacity ^\ith massecuite of 55 purity and of 93° 

 Brix occupjdng 23 -5 cu. 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 iP ~ 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 purit}-, there \vi\l be required 13,332 

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



Fig. 



^53 



lor the most adverse conditions, such as h'gh Brix and low puritj', 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 



