THE GENERAL COMPOSITION OF MILK 



studies, the length of interval is kept constant. This is referred 

 to in considering the fat-content alone. 1 



Variations in the Fat-content during the Twenty-Jour Hours. 

 The work of Eckles and Shaw (3) in relation to the intervals of milking 

 shows that the fat- content was highest in the 10 A.M. milking, and 

 these authors state generally that the fat-content was usually 

 highest about midday. 



This appears to be also the case for the human species. Helbich (2) 

 took careful analyses of mixed samples of milk obtained from a 



Milking Twice Daily. 



lactating woman at four-hourly intervals during the day, with 

 an eight -hourly interval at night. The results of one of the sets 

 of experiments are shown in the diagram given on p. 26. 



The fat-content was in each case highest at 10 A.M. in this 

 experiment, but in several of the others it was highest at 2 P.M., 

 while the milk yield was greatest at the first feed i.e. after an 

 eight-hourly interval. 



The results of these investigations are very interesting, but 

 no explanation can as yet be given. 



1 See p. 43, and also the figures on p. 23 obtained by Wellmann with 

 different intervals of feeding. 



