CANE SUGAR. 



A nine-roller mill and crusher of size 30 in. X 60 in. will treat 20 tons of 

 cane per hour, and with mixed juice equal in weight to cane will give an 

 extraction of 93'5, the canes containing 12 per cent, of fibre ; a mill 34 in. x 

 78 in. will give the same results with 35 tons of cane per hour. 



A twelve-roller train 30 in. X 60 in. under equal conditions will give an 

 extraction of 95*0. 



A fifteen-roller train 30 in. X 60 in. under equal conditions will give an 

 extraction of 96-0. 



A twelve-roller train and crusher 34 in. X 78 in. will treat up to 50 tons 

 of cane per hour and give an extraction of 94 -5 under the same conditions as 

 before. 



FIG. 110. 



A fifteen- roller train and crusher 34 in. x 78 in. will treat up to 60 tons 

 of cane per hour and give an extraction of 95-5 under the same conditions as 

 before. 



The Motive Power of Mills. With the exception of a few 

 instances in unprogressive districts, steam is the agent used to drive sugar 

 mills; wind power is still employed to some extent in Barbados, and where 

 water power is available no objection can be made to its use. Electrically- 

 driven mills still belong to the future, but the design of one prime motor, to 

 drive electrically all the machinery in a factory, offers no great difficulty; and, 

 where water power is available, the design of a system of turbines, dynamos, 

 and motors to drive all the engines and pumps in a factory without burning any 

 fuel for motive power, is quite feasible, and milling plants have been erected 

 where the motive power is derived from a fall of water through a Pelton wheel. 



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