CHATTER XTX: 
SUGAR MILLS. 
Composition of Sorghum Cane Juice—Extraction of the Juice—Su-: 
gar Mills—Percentage of Juice ordinarily extracted by Mills— 
Loss from Inefficiency of Mills—Obstacles to the complete Re- 
moval of the Juice—To what extent they may be overcome—The 
Common Three Roll Mills at the South—Mean Results of Exper- 
iments with these Mills in Guadaloupe—British West Indies— 
Cuba, Java, and Louisiana—Importance of further Improvements 
—Necessity of Grinding at alow rate of Speed—How the-Advan- 
tages of the Process of Maceration may be successfully combined 
with those derived from the use of the Mill—Mills with Four 
Rolls provided with a Pipe for the Injection of Jets of Steam into 
the Begassa—Value of these Improvements. 
Ir a ripe stalk of Chinese cane, the juice of which clar- 
ified is of the density of 9° Beaumé, be thoroughly dried 
by artificial means, in air the temperature of which does 
not exceed 212 Far. (100° Cent.) it will be reduced to 
about 27 percent. of its original weight, the remainder—73 
per cent., or nearly three-fourths, being water which has 
passed off by evaporation. In the dried stem there is left 
the saccharine matter constituting about 14:5 per cent. of 
its original weight, and 12°5 per cent. of woody fiber-starch, 
albumen, salts, ete. 
The fresh, undried stalk, therefore, contained 87°5 per 
cent. of its weight of saccharine juice. 
The ordinary crushing mills extract but 50 to 60 per cent. 
(124) 
