28 BULLETIN 330, U. S. DEPARTMENT OF AGRICULTURE. 
It is evident from a study of the milling process that no important 
variation in chemical composition in the rice, except for the addition 
of a small percentage of glucose and talc, takes place after the grain 
leaves the brush. It is at this point that the distinction is made 
between coated and uncoated (erroneously called polished and 
unpolished) rice. The former receives an addition of a small 
amount of glucose and talc in the trumbles. while the latter is bagged 
without such a coating. The fact should be kept in mind that these 
two products are entirely different from the brown rice from the 
paddy machine, both in appearance and in chemical composition. 
The greater proportion of ash. ether extract, crude fiber, protein, and 
pentosans found in 
HaNVU**S-TYW *>,<?£■ blwn • as com _ 
.•jVS-% 
pared to the quantity 
£ ^ e/p ^~^b^W *"!* % in the corresponding 
c*>un£ r,*^ giil^ % milled rice, is graph- 
-■=_---■ HB^BHHHHi^HS^Bi^HBri.S^t v ically sllOWll ill fig- 
^/vT-oswi-^^pJ^* ure 11. p rep a r e d 
from data given in 
Tables VII and XL 
£-7-/V£~/P ^ /rT ' f? '^ c7 \j' i . 
« CHEMICAL ANALYSES 
C&tJ&E: /*■/&£■& ^^^£ % OF BY-PBODT7CT5. 
S&OWSV &/<?£. HULL ft£MOr£0 
Eice hulls are now 
considered of little 
value, if not posi- 
Fig. 11. — Diagram showing a comparison of the chemical com- tively harmful, as a 
position of brown rice from the paddy machine with that ~|„„u fpprj Tl^pr-p io 
of the corresponding fancy head grade of milled rice. . 
a limited market for 
them as a packing material at about $4 per ton. but by far the greater 
portion is burned to furnish power for the rice mills. 
Eice bran, when fresh and free from hulls, is an excellent stock 
feed, but on account of its high fat content it is liable to become 
rancid and therefore unpalatable to cattle in warm weather. It is 
also frequently attacked by weevils and other insects if stored in 
warehouses infested by them. 
Eice polish is a highly nutritious flour and is used in the United 
States as a stock feed. Like bran, it is susceptible to insect attack 
and becomes rancid in a warm climate. 
The accumulation of weed seeds mixed with small amounts of 
rice and sweepings from the mill is generally sold locally as chicken 
feed. Such material may amount in exceptional cases to 15 per cent, 
but the usual figure is probably less than 1 per cent. 
