190 



SCIENCE 



[N. S. Vol. XXXVII. No. 944 



material we have an opportunity to study the 

 nutritive value of the proteins before they 

 have been subjected to the chemical operations 

 incident to their isolation and purification. 

 These curves shove that the mixture of proteins 



mals. It is interesting to note that the weight 

 lost by these animals was much more quickly 

 regained when one half of the corn gluten was 

 replaced by lactalbumin than by edestin, re- 

 sults which agree with those obtained by add- 



in the corn gluten is capable of maintaining ing these proteins to the zein diets. 



60 80 3)ajs 



Chart VI 







01,^ 



^atSbCji 



Chart VII 



rats for some time. Unfortunately at the 

 time these experiments were started our 

 supply of stock rats was so low we were obliged 

 to use rats which had been previously subjected 

 to long-continued experimental feeding. 

 Doubtless better results will be obtained when 

 we repeat these experiments with fresh ani- 



The results here presented leave no doubt 

 that the deficiency observed in the practical 

 feeding of cornmeal is explained largely, if 

 not wholly, by the unique chemical constitu- 

 tion of zein which forms such a large part of 

 its proteins. 



Many more experiments must be made be- 



