CANE SUGAR. 



rollers rest on surfaces at right angles to the direction of pressure, so that the 

 resolved force tending to push the rollers outwards is zero, and the necessity 

 for horizontal bolts disappears. The vertical throughway bolts are inclined 

 towards each other from above downwards giving a very narrow trash turner. 



Hall's Inclined Headstock Mill. A mill of the design 

 shown in Fig. 107a, was put in operation at the Pimnene factory of the 

 Hawaiian Commercial and Sugar Company in 1 909 ; the principle involved in 



FIG. 107. 



this design is the placing of the king bolts and of the hydraulic pressure in the 

 same line as the resultant of the stresses caused by the pressure between the 

 top roll and the front and back rolls. If the stresses between the top roll 

 and front roll, and top roll and back roll, were equal, tbe top roll would 

 tend to lift vertically ; owing however to the greater stress between the top 

 roll and back roll, there is a tendency to push the top roll upwards in a 



176 



