THE INORGANIC CONSTITUENTS OF MILK 41 



TABLE II 



Showing the haemolysis obtained by the action of cri c.c. of cows' 

 whey anti-serum on a 0*32 per cent, protein solution oj 



Cows' Milk 



The high power of globulin to form anti-sera is of considerable 

 interest in view of the fact that the anti-toxins in the serum are 

 known to be attached to the globulin fraction. Bauer and Engel 

 showed further that the albumin and globulin obtained from 

 milk and from serum are respectively biologically identical. 



Caseinogen is found in no other tissue-fluid, and stands 

 apparently in a class by itself. 



The differentiation of the proteins of milk have been investigated 

 by means of anaphylactic methods by Besredka and Heuner. 

 Besredka found that with whole milk the toxic constituent was 

 the caseinogen, and that sensitivity was not always produced 

 by injecting whey. Heuner, working under Bauer, confirmed the 

 differentiation of the three proteins, and also the relationships 

 already mentioned. 



The Proteins of Colostrum. Fully as much work has been 

 carried out upon the biological relation of the proteins of colos- 

 trum, as upon those of later milk. 



Kollmeyer, Bauereisen, and Bauer and Engel, using the methods 

 above described, have all reached the same fundamental con- 

 clusion, namely, that the proteins of colostrum are biologically 

 identical with those of later milk, and the whey-proteins of colostrum, 

 as of later milk, are biologically indistinguishable from those of 

 the serum. 



Bauereisen believed that the anti-serum obtained by the injection 



