CANE SUGAR. 



successful, one very potent objection being that the rollers cannot be set close, 

 else the mill refuses its feed ; whilst in a three-roller mill, the front roller acts 

 as feeding roller to the back one. Two-roller mills were advocated by 

 Eousselot in Martinique, and by Alexander Young in the Hawaiian Islands, 

 as ' macerating ' mills to be used after a three-roller mill. 



Four-Roller Mills. Of four-roller mills, which have never come 

 into general use, the best known are the De Mornay and Le Blanc. The 



m 



FIG. 108. 



former, which has been erected to some extent chiefly in Peru, Argentina, 

 and Brazil, is shown in Fig. 110. It consists of two main rollers a and 5, 

 and two supplementary rollers c and d. The cane is crushed three times, 

 between a and c, a and d, and a and b ; no trash turner is required. This mill 

 has given good results with long jointed canes, but with short jointed hard 

 brittle canes it has not been successful. 



178 



