iio IndionapoHs Biochemical Meeting: Ahstracts [Sept. 



ally with the wj-di-hydroxyl Compound, and data were also given 

 which makes it appear very improbable that the cause lies in a 

 more rapid oxidation of the orcin, etc., to colorless derivatives. 

 The only other alternative is that the action is of the same nature 

 as that of a triie anti-oxidase. If, therefore, throiigh some body 

 process, an additional hydroxyl were added to ty rosin adjacent to 

 the alkyl chain, a Compound would result which should not give 

 colors with tyrosinase, nor allow colors to be produced even though 

 tyrosin were present. Such a Situation would produce dominant 

 whites. 



Effect of the Quantity of Protein Ingested on the Nutrition 



of Animals 



IL ON THE WEIGHTS OF SOME VITAL ORGANS FROM LAMBS 



W. E, CARROLL AND A. D. EMMETT 



(Laboratory of Physiological Chemistry, Department of Animal 

 ' Hiisbandry, University of Illinois, Urhana, III.) 



Twenty-one Shropshire lambs of practically the same age and 

 type and of very similar ancestry were divided into three lots of 

 seven animals each. Lots I, II, and III were fed respectively on 

 what was designated as low, medium, and high protein planes. A 

 careful record was kept of the nutrients actually consumed. At 

 the end of the feeding period, detailed slaughter tests were carried 

 out. All of the various organs and parts from the twenty-three 

 animals were weighed. Further, some of the special organs were 

 preserved for chemical and histological studies. 



The weights of the brains, kidneys, liver, and heart show, that 

 with the exception of the kidneys, the feed has little or no effect 

 upon the development of the organs as far as their weight is con- 

 cerned. The kidneys seem to increase directly with the protein fed 

 — the average weights for the three lots being 95.7, i lo.i, and 122.3 

 grams respectively. Individuality seems to be a very great factor. 

 In fact, if we apply mathematical methods as suggested by Rietz 

 and Mitchell,^ individuality is found to be a greater factor than 

 feed, excepting in the case of the kidneys. 



^ Rietz and Mitchell : Journal of Biological Chemistry, 1910, viii, p. 297. 



