116 Percentage Conipositum of Mill, 



in volume wliich takes place at the commencement and cessation of 

 lactation respectively. 



Table 111. 



It may be seen from Figs. 2 and 3 that tlie changes in the percentage 

 composition of the milk which accompanied alterations in volume, due 

 to these causes, were the same in nature as the changes which accom- 

 panied the fluctuations in volume brought about in the preceding experi- 

 ment by the two days' starvation. 



(During E.xp. Ill, commencement of lactation, a milk analysis was 

 carried out only on alternate days.) 



As a result of these and other similar experiments, not described here 

 for reasons of economy of space, it seemed possible to formulate the 

 following general principle : That, on a diet of constant composition, the 

 percentages of all the (-oustituents of the milk, with the exception of 

 the lactose, tend to vary inversely as the daily volume of milk secreted ; 



