78 MANUAL FOR SUGAR GROWERS. 



Preston & Co., Liverpool) the trash turner is dis- 

 pensed with. The mill has four rollers, two of 

 which are large and two are 

 small. The construction of 

 the mill will be easily under- 

 stood from the diagram, Fig. 

 11. 



It would appear that dis- 



FIG. 11. Diagram of De Mor- pensing with the dumb re- 

 nay mill. 



turner, and obtaining three 



distinct crushings of increasing power, the final one 

 from the heavy rollers is an important advance in 

 mill construction. Mills of the De Mornay type will 

 doubtless find increasing favour in the near future. 



Another important improvement in the construc- 

 tion of cane-mills consists in holding the rollers in 

 place by flexible, instead of rigid, supports. In the 

 older mills the rollers were held in place by means 

 of screws passing into the framework of the mill, so 

 that the rollers were kept almost inflexibly in one 

 position the result being that if anything, either 

 cane or some foreign body, were forced into the mill 

 in such quantity that it could not pass between the 

 rollers, the mill must either stop choke as it is 

 termed or something must break. It thus be- 

 comes a question of relative strength of mill and 

 engine. 



In improved mills the rollers are kept in place by 

 what is known as the hydraulic attachment. This 

 consists of a simple modification of the ordinary 

 hydraulic press. It is well known that if pressure 

 be applied to a fluid, the pressure is transmitted 



