of the University of Pennsylvania. 21 



albuminoids, is noticeable in the " gluten-cells," 

 while the gradual condensation of the gluten of the 

 endosperm as the cortex is approached, is evidenced 

 by a quite vivid coloration of the fibrils. 



Schenk * has applied Millon's reagent to sections 

 of wheat with a resultant assumption by the endo- 

 sperm of a pink tint and " no coloration of the corti- 

 cal gluten-cells." The starch was not removed, and 

 the method of distribution of gluten was not deter- 

 mined. By artificial gastric digestion of wheat sec- 

 tions, the same observer noted that the starch of the 

 section became readily detached, and deduced from 

 this the just proposition that the gluten lay between 

 the starch-granules. 



Objections are not infrequently offered by the 

 chemist to the microscopical determination of or- 

 ganic compounds, especially where any attempt at a 

 quantitative estimation is made. All that is claimed 

 for the methods above described is the demonstration 

 of gluten in very considerable quantity in the inner 

 layers of the wheat-grain. It is but just to state, 

 however, that by these methods a conception may 

 be obtained of the quantity of proteids within the 

 grain fully as accurate as that given by the usual 



1 Anat.-Physiol.-Unters., p. 32. Wien, 1872. 



