18 
BULLETIN 330, U. S. DEPARTMENT OE AGRICULTURE. 
parison of the relative sizes or weights of the grains of the two types 
is clearly shown in Table V. 
Table V. — Effect of various rice-milling machines on the weight per 1.000 
kernels of rice. 
Average weight of rice 
samples (grams). 
Milling stage. 
Honduras 
type, 9 
samples. 
Japan type, 
5 samples. 
Paddy machine 
24.13 
22.80 
22.07 
22.20 
22.35 
22.44 
21 50 
Brush, brewer's rice: 
In 
20 20 
Out 
20 40 
Trumbles 
20 56 
Figure 7 illustrates the data contained in Table V and shows the 
gradual decrease in weight per 1,000 kernels of rice of the Honduras 
and Japan types as 
the milling process 
proceeds. 
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CHEMICAL EFFECT. 
Figures in Lou- 
isiana Agricultural 
Experiment Station 
Bulletin 21 (first se- 
ries), 1889, show the 
difference in chem- 
ical composition of 
one lot of rice at va- 
rious stages in the old 
mortar- and - pestle 
milling process in 
Louisiana. 
Similar results 
were obtained by 
McDonnell (1901), 
South Carolina Ag- 
ricultural Experi- 
ment Station Bulletin 59, on the product of a South Carolina mill of 
the same type. Apparently the scouring proceeded further, however, 
than in the case of the Louisiana mill. The analyses of both lots are 
shown in Table VI. 
The chemical analyses of samples of rice of the Japan type milled 
in a "plantation huller," also given in Table VI. were made in the 
Bureau of Chemistry, Department of Agriculture, according to the 
Fig. 7. — Diagram showing the effect of various milling ma- 
chines on the weight per thousand kernels of the Honduras 
and Japan types of rice. 
