CANE SUGAR. 



consists of slotting either the vertical or horizontal bolts so that the whole 

 system lies in one plane. In the Delbert design, Fig. 105, but one horizontal 

 bolt is used, and it is entirely absent in the Krajewski-Pesant design shown 

 in Fig. 107. 



In Figs. 103 and 104 are given side and end elevations of a modern 

 Rousselot mill; the principal parts are the headstocks or mill cheeks, the 

 rollers, the caps or keeps, the sole plate or bed plate, and the trash or dumb 

 turner. The headstocks b are heavy solid castings ; in them are three 

 openings one at the top and one at each side, which serve for the intro- 



103. 



duction of the rollers a. The rollers consist of a shell of iron or steel, 

 which is forced by hydraulic pressure on to the shaft or gudgeon ; formerly 

 the shell was hung on the shaft by six or eight keys, and occasionally in old 

 mills square shafts are to be met with. The shaft, which is also called the 

 gudgeon, is constructed either of hammered scrap-iron, wrought-iron, or in 

 the most recent designs, of fluid compressed steel. The shafts are nearly 

 always made solid, as no benefit is obtained by a light, hollow shaft, and 

 it is desirable to keep their diameter as small as possible, consonant with 

 sufficient strength. The shafts rest on brasses h of gun metal of large 



172 



