THE MILLING OF RICE. 
15 
lute accuracy the classes of separated rice, they will serve for com- 
parison and are more convenient for use in the tables which follow 
than exact descriptions could be. Furthermore, the ideas to be pre- 
sented are more readily grasped than if the separations were desig- 
nated merely by consecutive letters or numbers. The weight of 1,000 
kernels was determined by counting and weighing 250 of the whole 
grains, separated as previously described. 
BKEAKAGE IN MILLING. 
Unfortunately no figures are available from the literature which 
show the breakage of rice in the mortar-and-pestle mills. It is 
asserted, however, that this breakage was surprisingly small, consid- 
ering the great weight of the iron-clad pestle. The decline in the use 
of these mills was undoubtedly due to other economic factors, such as 
their comparatively small daily output, considering the equipment 
involved, and their incapacity for fine adjustment to suit varying 
qualities of rice. 
The " plantation hullers," on the other hand, cause great breakage, 
especially to rice of the Honduras type. The writers have examined 
samples taken from one lot of the Honduras type and three lots of 
the Japan type milled in " plantation hullers." Of the Honduras 
lot samples were secured of the partly milled grain and of the fin- 
ished product, while the samples of the Japan type all represent the 
finished milled rice. 
In Table III special attention is called to the excessive breakage of 
the rice. The action of the second hulling as well as the first is 
shown to be very disastrous to the whole-grain content. 
Table III. — Size separation of rice of the Honduras type milled in "plantation 
hullers.'''' 
Milling stage. 
Grains (percent). 
Whole. 
Three- 
fourths. 
One-half. 
One- 
third. 
Less than 
one-third. 
After first hulling. 
Finished product. 
32.0 
9.6 
12.7 
44.1 
38.8 
7.0 
24.8 
4.2 
18.0 
Fifty-six series of samples of the Honduras type of rice were se- 
cured from big modern mills in all parts of the rice-growing belts 
of Louisiana, Texas, and Arkansas, representing various grades 
and qualities of rough rice. Table IV, which follows, has been pre- 
pared from the figures showing the mechanical analyses of these se- 
ries. The analytical results for the rough rice have been omitted 
from the table, as the figures are not easily comparable and have no 
particular bearing on the phase in question. 
