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 

 unpojishecl) 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 

 brown rice, as com- 

 pared to the quantity 

 in the corresponding 

 cs?un£ r/se* fi3 %* % milled rice, is graph- 



^o7f//v \sBgammmBmam^H^s^m^am^ 3 3^ ically shown in fig- 

 /=£Af -ro&fvs^^^^^if;^ "*- ure 11, prepared 



from data given in 

 Tables VII and XI. 



ETME/P £-AT/?/7C7-\ 



<ys?/=>s3A/ - Tr/^F f?/c-£ 



E-7-ts^f? Exr/=?/7cr\ 



CHEMICAL ANALYSES 

 Cf?UO£ / r -/S£Tfr' W-^'~J K OF BY-PRODUCTS. 





B/=?OW/V f?/C?£. HULL f?EMOr££> 

 FVWCy HE/10 M/LLED /?/<?£ 



Rice hulls are now 

 considered of little 

 value, if not posi- 



Pig. 11. — Diagram showing a comparison of the chemical com- tlVely harmful, as a 

 position of brown rice from the paddy machine with that cfofk fppd ThprP 1<3 

 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. 



Rice 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 arid other insects if stored in 

 warehouses infested by them. 



Rice 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. 



