THE BY-PRODUCTS OF RICE MILLING. 9 
Table 6. — Analyses of miscellaneous samples of interest. 
Mill. 
Sample No. 
Descript ion of sample. 
Mois- 
ture. 
Ash. 
Ash 
insolu- 
ble in 
to per 
Ratio of 
insoluble 
ash to 
total 
Crude 
fiber. 
Protein 
(NX 
6.25). 
Ether 
ex- 
tract. 
cent 
HC1. 
ash. 
Perct. 
Perct. 
Perct. 
Perct. 
Per ct. 
Per ct. 
A . . . . 
25054— L 
Light or blighted grains 
from monitor. 
7.43 
18.60 
16. 80 
1 
1.10 
35.70 
5.80 
2.80 
A.... 
25058— L 
Blighted grains mixed 
with stone-reel bran. 
8.60 
16.20 
13. 10 
1 
1.24 
26. 70 
8.90 
6.60 
A . . . . 
25055— L 
Rice, Blue Rose type, from 
clean side of paddy ma- 
chine. 
13.80 
1.10 
.04 
1 
27.50 
0.96 
8.60 
2.00 
C... 
25079— L 
Dust from dust collector 
connected with hull 
grinder. 
Brown rice from package 
8.40 
29.90 
25. 50 
1 
1.17 
12.60 
7.80 
3.80 
F.... 
25176— L 
10.30 
1.30 
.08 
1 
16.25 
.80 
7.80 
1.90 
as found on the market. 
I 
119S9-L 
Polish taken from brush 
maohine by air blast. 
9.49 
7.28 
.55 
1 
13.23 
2.10 
11.75 
12.38 
J 
17060— L 
Light or blighted grains 
from monitor. 
10.21 
17.40 
15.90 
1 
1.09 
32.97 
4.81 
1.25 
K.... 
15310— K 
11979— K 
Do 
9,. 28 
7.98 
16.40 
19.84 
14.47 
18.69 
1 
1 
1.13 
1.06 
29. 90 
36. 72 
6.72 
3;. 56 
1.48 
P . . . . 
Ground and bolted rice 
.93 
hulls from mill. 
P.... 
13449— K 
Bran standardized with 
ground hull. 1 
10.89 
10.43 
6.04 
1 
1.70 
12.80 
11.28 
8.91 
P.... 
13452— K 
15438— K 
Do.i 
10.34 
5.55 
11.64 
18.91 
6.51 
17.62 
1 
1 
1.70 
1.07 
16.03 
36.01 
11.64 
3.76 
10. 38 
Q-... 
Ground and bolted rice 
1.10 
hulls from mill. 
Q-... 
15433— K 
Light or blighted grains 
from monitor. 
9.26 
13.12 
11.54 
1 
1.10 
27.03 
7.96 
1.55 
Q-... 
15436— K 
Dust from dust collector 
connected with hull 
grinder. 
Rice, Honduras type, from 
6.40 
27.71 
24. 89 
1 
1.10 
17.08 
7.00 
2.99 
G.... 
25183— L 
14.80 
1.20 
.20 
1 
6.00 
.96 
8.90 
2.20 
clean side of paddy ma- 
chine. 
S 
12636— L 
Polish taken from brush 
machine by air blast. 
9.80 
6.68 
1.38 
1 
4.77 
2.04 
13. 16 
13: 15 
u.... 
17090— L 
Do 
8.49 
8.35 
.88 
1 
9.48 
3.65 
13.69 
18.99 
1 Shipped unlabeled as 20 per cent fat + protein. 
MILLING AND CHEMICAL RESULTS ON CONTROL SAMPLES FROM A TYPICAL MILL. 
The second part of the work consisted in the collection and analysis 
of the several reduction products obtained under carefully controlled 
and known conditions. A typical rice mill of moderate size was 
selected and through the courtesy of the owners representatives of 
the department were given control of its operation. Arrangements 
were made to spout the various bran streams separately and to collect 
and weigh each portion of a given run as it was taken off. Samples 
were drawn from each stream and were analyzed separately. A 
complete feed analysis was made of the by-product samples and a 
moisture determination of the rice at various stages of milhng. Four 
lots of rice were milled in this manner. 
Lot A consisted of No. 1 Blue Rose type rice. This lot contained 
little or no red rice and was of as good grade as is ever used for mill- 
ing. It cupped 42 pounds to the bushel. The regular adjustment of 
the stones and hullers was used in milling this rice. 
The milling results on this lot are given in Table 7. 
