THE BY-PRODUCTS OP RICE MILLING. 



11 



Lot B consisted of No. 3 Blue Rose type rice. This lot contained 

 considerable red rice and some cracked and over-ripe grains, and was 

 of very ordinary quality. It cupped 43 pounds to the bushel. The 

 stones were lowered to the usual height, the hullers set loose, and fed 

 at regular speed. The rice was brushed with large feed on brush. 

 The whole process was regulated throughout to preserve the grain 

 rather than to obtain a highly milled rice. 



The milling results on this lot are given in Table 9. 



Table 9. — Yield of by-products and cleaned rice obtained from the milling of 36,080 

 pounds of No. 3 Blue Rose type rice. Lot B. 



[Quantity of rice milled: 183 bags or 222.7 barrels of 162 pounds each; total weight, 36,080 pounds.] 



Cleaned rice and by-products. 



Yield. 



Cleaned rice and by-products. 



Yield. 



Hulls 



Pounds. 

 6,872 



755 

 727 



1,001 



Per cent. 

 19.0 



2.1 

 2.0 



2.7 



Polish 



Pounds. 



1,179 



22,000 



2,880 



150 



516 



Per cent. 

 3.2 







60.9 



Stone reel (29.3 per cent) . . 

 First break (30.4 per cent). 

 Second break (40.3 per 





8.0 





0.4 





1.4 











The laboratory results on the samples from this run are shown 

 in Table 10. 



Table 10. — Chemical composition of by-products and of rice at different stages of milling 

 No. 3 Blue Rose type ricz. Lot B. 



Sample 

 No. 



Description of sample. 



Mois- 

 ture. 



Ash. 



Ash 



insol- 

 uble in 

 10 per 

 cent 

 HCl. 



Ratio of 

 insoluble 



ash to 

 total ash. 



Crude 

 fiber. 



Protein 



(NX 

 6.25). 



Ether 

 extract. 



Nitro- 

 gen- 

 free 



extract. 



18066— L 





Per ct. 

 5.87 

 7.52 

 7.30 

 7.25 



7.35 

 6.38 

 10.42 

 10.91 



10.77 



7.55 



10.93 



10.57 



11.13 

 11.90 



10.33 

 11.32 



10.51 



Per ct. 



20.01 



15.28 



7.71 



7.77 



10.04 

 8.01 



Per ct. 

 19.76 

 12.52 

 1.42 

 1.34 



4.76 

 0.91 



Per ct. 

 1:1.01 

 1:1.22 

 1:5.43 

 1:5.80 



1:2.32 



1:8.80 



Per ct. 



38.72 



20.35 



9.03 



7.72 



11.94 

 4.45 



Per ct. 



2.08 



9.47 



14.93 



14.68 



13.17 



13.48 



Per ct. 



0.47 



8.02 



20.20 



19.51 



16.22 

 19.04 



Per ct. 

 32.85 



18063— L 





39.36 



18071— L 

 18073— L 



First-break bran 



Second-break bran 



Calculated analysis of 



40.83 

 43.07 



41.29 



18075— L 





48.64 



18061— L 



Rough rice before milling 



Cleaned rough rice 



Rice, bran, and hulls 

 after stone 





18062— L 

















18064— L 

















18065— L 



Hulls and bran from 



stone monitor 



Rice from monitor going 

















18067— L 

















18069— L 



Rice from rough side of 

 paddy machine 



Rice from clean side of 

 paddy machine 



Rice after first-break reel. 



Rice after second-break 

 huller reel 

















18068— L 

















18078— L 

















18072— L 

















18074— L 



Rice after brush machine 



Rice after brush machine 



(finely ground) 

















18074— L 



0.46 



0.03 



1:15.3 



0.56 



8.03 



0.64 



79.80 



