THE MILLING OF RICE. 



23 



size of the particles or the percentage of whole grains. Several 

 other factors affect the commercial value of various lots within the 

 same grade. These factors in relative importance are (1) color, (2) 

 proportion of grains damaged by heat or by insects, (3) presence 

 of weed seeds, and (4) presence of unhulled, or paddy, rice grains. 

 For the purpose of this paper, only the size separations will be 

 considered. 



BICE OF THE HONDURAS TYPE. 





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The commercial grades of the Honduras type of rice generally now 

 made in the mills are (1) extra fancy head or triple-screened rice 

 (made only when the 

 rough rice is of ex- 

 ceptionally good qual- 

 ity) ; (2) fancy head, 

 or "head" rice; (3) 

 second head rice ; (4) 

 screenings; (5) brew- 

 er's rice; and (6) line 

 ( u n g r a d e d ) rice 

 These designations 

 are commonly used 

 in rice mills, and less 

 commonly by produce 

 exchanges in their 

 quotations. They are 

 strictly trade terms in 

 origin and in use and 

 are not the result of 

 any ruling by the De- 

 partment of Agricul- 

 ture. 



The graded samples 

 of rice which are 



about to be described were secured during 1912 and 1913 from all 

 parts of the rice-growing sections of Louisiana, Texas, and Arkansas. 

 They were obtained principally from mills, but a few came from rice 

 brokers and other sources. Mechanical analyses were made of the 

 samples secured, in the same way as previously described for the 

 samples from the milling machines. 



The grade known as extra fancy head, also known as triple 

 screened, is rarely made and is not one of the common commercial 

 grades. The mill yield approximates 30 pounds per barrel of 162 

 pounds of rough rice. The results of analyses of the samples of this 

 grade are given in Table VIII. 



Fig. 9. — Diagram showing the effect of modern rice milling 

 machines on the ash, ether-extract, crude-fiber, protein, 

 and pentosan content of rice of the Japan type. 



