26 



S. HATAl 



TABLE 2 



ShoifiNg the data on the composition of the milk of several mammals compared ivith 

 that oj the stomach contents of the suckling albino rats 



* Water extractives. 



I shall discuss the content ot fat later in connection with the 

 content of fat in the entire body during the suckling period 

 (p. 30). I may state here simply that the high fat content of 

 rat's milk is easily understood when the other components 

 are considered. 



Another interesting fact which is to be noted is that the pro- 

 tein content of the milk in relation to the rate of body growth 

 in the rat is quite harmonious with other mammals, as will be 

 seen from the following table (after Abderhalden '99). 



It appears from this agreement in relations that the stomach 

 contents here analysed may fairly well represent the composition 

 of the normal fresh milk. 



TABLE 3 



Shoicing the relations between the protein content of the total milk and the rate of 

 body growth in several inammals 



Man.. 

 Horse 

 Cow. . 

 Goat. 

 Sheep 



H .^ M 

 « n 2 



180 

 60 

 47 

 22 

 15 



per 

 cent 



1.6 

 2.0 

 3.5 

 3.7 

 4.9 



per 



Cent 



0.20 

 0.40 

 0.70 

 0.78 

 0.84 



Pig.-.. 

 Cat.... 

 Dog. . 

 Rat... 

 Rabbit 



per 



cent 



0.80 

 1.02 

 1.33 

 1,61 

 2.50 



