632 



MAIZE 



CHAP. 

 XIII. 



reduce the hominy to grits The break flour is carried from 

 the machine by an air current through conduits and finally 

 collected. This is another very pure form of the white starch. 

 " Thus, in the regular milling process, there are two physi- 

 cal parts of the corn kernel separated in very pure form, 

 namely, horny starch (fine grits) and white starch (break flour 

 or corn-flour), and two other distinct parts which are separated 

 somewhat less perfectly, the hulls and the germs." 



The following table shows the composition of the several 

 parts of the maize-grain, as separated by the hominy mill and 

 by hand respectively : — 



Table LXXXVIII. 



COMPOSITION OF PARTS OF THE GRAIN AS SEPARATED BY THE 

 MILL AND BY HAND. 



Hopkins (3) points out that 



" In general the composition of these mill separations 

 agrees with the composition of the same parts separated by 

 hand, although in nearly all cases the mill products show more 

 or less contamination or mixture with other parts of the ker- 

 nel. Thus the mill hulls are noticeably high in protein and oil 

 owing to the presence of some particles of horny gluten and 

 germ ; while the mill germs are too low in protein and oil 

 because of the presence of some hulls and tip caps. Further- 

 more, some oil is lost from the germ and absorbed from other 

 parts in the milling process. The fine grits are almost pure 

 horny starch, except that they contain about twice as much oil 



