THE MILLING OF EICE. 
23 
size of the particles or the percentage of whole grains. Several 
other factors affect the commercial value of various lots within the 
same grade. These factors in relative importance are (1) color, (2) 
proportion of grains damaged by heat or by insects, (3) presence 
of weed seeds, and (4) presence of unhulled, or paddy, rice grains. 
For the purpose of this paper, only the size separations will be 
considered. 
RICE OF THE HONDURAS TYPE. 
s?/ce r/roM /?/€£ 
£>/?OSH TRUMBLE 
The commercial grades of the Honduras type of rice generally now 
made in the mills are (1) extra fancy head or triple-screened rice 
(made only when the 
rough rice is of ex- 
ceptionally good qual- 
ity) ; (2) fancy head, 
or "head" rice; (3) 
second head rice; (4) 
screenings; (5) brew- 
er's rice; and (6) line 
(ungraded) rice 
These designations 
are commonly used 
in rice mills, and less 
commonly by produce 
exchanges in their 
quotations. They are 
strictly trade terms in 
origin and in use and 
are not the result of 
any ruling by the De- 
partment of Agricul- 
ture. 
The graded samples 
of rice which are 
about to be described were secured during 1912 and 1913 from all 
parts of the rice-growing sections of Louisiana, Texas, and Arkansas. 
They were obtained principally from mills, but a few came from rice 
brokers and other sources. Mechanical analyses were made of the 
samples secured, in the same way as previously described for the 
samples from the milling machines. 
The grade known as extra fancy head, also known as triple 
screened, is rarely made and is not one of the common commercial 
grades. The mill yield approximates 30 pounds per barrel of 162 
pounds of rough rice. The results of analyses of the samples of this 
grade are given in Table VIII. 
Fig. 9. — Diagram showing the effect of modern rice milling 
machines on the ash, ether-extract, crude-fiber, protein, 
and pentosan content of rice of the Japan type. 
