THE BY-PRODUCTS OF RICE MILLING. 

 Table 6. — Analyses of miscellaneous samples of interest. 



Mill. 



Sample No. 



Description of sample. 



Mois- 

 ture. 



Ash. 



Ash 

 insolu- 

 ble in 

 10 per 



cent 

 HCl. 



Ratio of 



insoluble 



ash to 



total 



ash. 



Crude 

 fiber. 



Protein 

 (NX 

 6.25). 



Ether 

 ex- 

 tract. 









Per ct. 



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 



11989— L 



Polish taken from brush 

 machine 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 r 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 



©452— 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. 

 Polish taken from brush 



















S 



12636— L 



9.80 



6.68 



1.38 



1 



4.77 



2.04 



13. 16 



13:15 







machine by air blast. 



















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 milling. 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. 



