654 



LECTURE XXVIII. 



species of animals. This is also true of the organic constituents, especially 

 protein, fat and carbohydrate, as the following table shows: 

 One hundred parts by weight of milk contain: 1 



Human milk differs from all of the above varieties except ass's milk, in 

 containing more albumin than casein. One hundred parts by weight of 

 human milk contain: 3 



Milk, besides containing casein and albumin, also contains a small 

 amount of globulin. 4 The composition of the milk with a uniform diet 

 varies but slightly during the nursing period, with the exception of that 



* Cf. Emil Abderhalden: Z. physiol. Chem. 26, 487 (1899); 27, 408 (1899). 



2 Computed from several analyses. Cf. Konig: loc. cit. pp. 661, 663, and 664. 



3 Average values from Konig: loc. cit. p. 598. 



4 Wroblewski [Z. physiol. Chem. 26, 308 (1898-99)] also believes that a different pro- 

 tein which he calls opalisin is present, but its isolation and description are not very 

 convincing. 



