THE MILLING OF EICE. 31 
fiber from the grain than was the case with the " plantation huller " 
or than is done in the modern mill. 
In the modern mill the brown rice from the paddy machine loses a 
considerable proportion of certain of its constituents in its passage 
through the scouring machines. There is thus removed from the 
brown rice about TO per cent of its ash, 85 per cent of its fat or oil, 
70 per cent of its crude fiber, 10 per cent of its protein, and 30 per cent 
of its pentosans. 
The grading of milled rice is based largely on the percentage of 
whole grains or the size of particles. The four commercial grades of 
the Honduras type of rice generally made are (1) fancy head, or 
"head," (2) second head, (3) screenings, and (1) brewer's rice. 
Other grades sometimes made are extra fancy head, or triple-screened, 
and line rice. The whole-grain content of the fancy head grade 
averages about 80 per cent and its mill yield 59 pounds per barrel of 
rough rice. Second head, screenings, and brewer's rice are largely 
broken grains of different sizes, and their average yield is 19, 15, and 8 
pounds, respectively. 
Three commercial grades of the Japan type of rice are generally 
made. These are (1) fancy head, or "head," (2) screenings, and 
(3) brewer's rice, with mill yields approximating 96, 5, and 5 pounds 
per barrel, respectively. The fancy head grade averages 90 per cent 
of whole grains; the other grades are similar to the corresponding 
separations produced from the Honduras type of rice. 
The mill yield of rice hulls approximates 30 pounds, of rice bran 
20 pounds, and of rice polish 6 pounds per barrel of rough rice. 
Chemical analyses of the several samples representing various 
commercial grades of rice show a slightly smaller percentage of ash, 
ether extract, and crude fiber in the higher than in the corresponding 
lower or more broken grades of both Honduras and Japan types of 
rice. The percentage of protein in the milled Honduras type of rice 
appears to be somewhat higher than that in milled Japan rice. 
Rice hulls contain but little ether extract or protein, but are very 
high in ash, crude fiber, and pentosans. Bran and polish are rich in 
fat and protein, and when fresh and not adulterated with hulls are 
considered an excellent stock feed. 
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