AMERICAN WHEAT AND CORN. 37 



4 



2084. Tailings from first centrifugal reel 



Largely flattened endosperm ; the rest gerin, with a little bran. 



2085. Tailings from second centrifugal reel. 



These are largely bran and flattened endosperm with a little germ. 



2086. Tail end of the tailings. 



As would be expected, almost entirely bran, with a little adherent endosperm and 

 a small amount of germ. The embryous membrane is still in place; in fact 

 during the whole process there is very little of it removed from the bran, and 

 were it the chief source of gluten there would be very little in any of the prod- 

 ucts. This, however, is not the case. It contains little or no gluten, being 

 merely a continuation of t he germ and having a similar composition. 



2087. Dust from No. 1 middlings. 



This is mostly cuticle epicarp and hairs, with smaller amounts of the more interior 

 parts of the grain. 



2088. Dust from the dust -catcher. 



This is all light, fluffy matter, and is" made up of small particles from all parts of 

 the grain. 



These observations upon the proportions in which the different por- 

 tions of the grain enter into the various products enable us to under- 

 stand and interpret the chemical analyses which follow with greater 

 clearness than could otherwise be done, and it will be seen afterward 

 that with a knowledge of the constituents of the different parts, of bran, 

 the germ and the endosperm, it is comparatively easy to predict almost 

 the exact composition of any of the mill products from the above data. 



