.VI THE SECRETIONS: 



On the effect of temperament on the milk. 



[It has been long believed that the milk of fair women is 

 inferior in its properties to the milk of brunettes. As far as I 

 am aware, the only analyses bearing on this point are those of 

 I/Heretier. He selected two females of equal age, and made 

 them submit to the same diet and mode of life. The following 

 are the results of his analyses : 



A Blonde, aged 22. A Brunette, aged 22. 



1. 2. 1. 2. 



Water . . 892-0 881-5 853-3 853-0 



Solid constituents . 108-0 118-5 146-7 147'0 



Butter . . 35-5 40-5 54-8 56-3 



Casein . . 10-0 9-5 16-2 17-0 



Sugar of milk . 58-5 64-0 71-2 70-0 



Salts . . 4-0 4-5 4-5 4-5 



He appears to have selected the analyses that presented the 

 most marked contrast ; for he observes, that if he had taken 

 the mean of all his analyses, the difference between the amount 

 of the solid constituents in the two cases would have been less 

 marked, the average ratio being 120 : 134. 



I/Heretier has likewise investigated the changes produced 

 in the milk by a prolonged sojourn in the breast. The two fol- 

 lowing analyses illustrate the effect thus produced. The milk 

 in each analysis was afforded by the same woman : in the first 

 case it had remained in the breasts for forty hours; in the 

 second, it was obtained after the infant had been sucking for 

 some little time. 



i. 2. 



Water . . . 901-1 858*0 



Solid residue . . 98-9 142-0 



Butter . . . 34-0 36-5 



Casein . . .1-9 13-0 



Sugar of milk . . 58-5 78*0 



Salts 4-5 4-5 ] 



On the changes in the milk dependent on nutrition. 



That the character of the food exerts an influence on the 

 quality and quantity of the milk, is a fact that has been long 

 known, although the nature of the changes could not be cor- 



