. Bulletin of the Department of Agriculture. Agriculture; Agriculture. 22 BULLETIN 330, U. S. DEPARTMENT OF AGRICULTURE. f?/C£ F/VOM /=I/C£ &/GE M/&CS-///VE */ULt£ft5 £?/C£ F7?0M f?'CE E'E/GrtL/NG E/90M COWS B£?L/SH f?/GE Ef?OM Tf?L/MBL£ the hulled rice is reduced more than three-fourths in the hullers, but through the remainder of the process the reduction is gradual and small. The total loss of fat in scouring is 85 per cent. The crude-fiber content of the rice is reduced 88 per cent when the hulls are removed, and 73 per cent of the remainder is lost dur- ing the process of sco
. Bulletin of the Department of Agriculture. Agriculture; Agriculture. 22 BULLETIN 330, U. S. DEPARTMENT OF AGRICULTURE. f?/C£ F/VOM /=I/C£ &/GE M/&CS-///VE */ULt£ft5 £?/C£ F7?0M f?'CE E'E/GrtL/NG E/90M COWS B£?L/SH f?/GE Ef?OM Tf?L/MBL£ the hulled rice is reduced more than three-fourths in the hullers, but through the remainder of the process the reduction is gradual and small. The total loss of fat in scouring is 85 per cent. The crude-fiber content of the rice is reduced 88 per cent when the hulls are removed, and 73 per cent of the remainder is lost dur- ing the process of scouring. The protein figure rises on the removal of the hulls, as was the case with the fat content. It is especially worthy of notice that only 10 per cent of the protein present in the hulled grain is lost in scour<- ing. This has already been explained by the fact that the protein- bearing aleurone layer is not removed during scouring and that the protoplasm which con- tains protein is dis- seminated throughout the starchy portion of the endosperm. Approximately 60 per cent of the pen- tosan content is re- moved with the hulls, and 32 per cent of the remainder is lost during the process of scouring. The loss of the va- rious chemical ingre- dients of rice of the Japan type corre- sponds closely to that given for that of the Honduras type. Figures 8 and 9 illustrate the data contained in the averages of Table VII, calculated moisture-free Fig. 8.—Diagram showing the effect of modern rice milling machines en the ash, ether-extract, crude-fiber, protein, and pentosan content of rice of the Honduras type. MILLED RICE AND ITS BY-PRODUCTS. MECHANICAL ANALYSES AND MILL YIELDS. The grading devices employed in the modern rice mill permit the milled rice to be separated according to the size of the particles into almost any character of grades desired. Mill and trade practice, however, has outlined roughly six grades of the Honduras type and three grades of the
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