144 



Studies in Milk Secretion 



as that of the control lot. Lucas^ found that cacao husk when fed to 

 milch cows diminished the milk yield 20 per cent, but it increased the 

 fat content 20 per cent, per volume ; this showing that the amount of 

 fat was not affected but that the cacao husk was deficient in nourish- 

 ment suitable for milk formation. 



—Pood Phloridzin 

 Days^ 2, 3 



cr. 



200 



Fig. 1. 



It is interesting to compare the foregoing changes in the yield and 

 composition of milk brought about by nutrition with those occurring 

 during the period of lactation. It has recently been shown by several 

 investigators that the growth and development of the mammary 

 glands is more especially under the control of the corpus luteum. It is 

 probably the influence of this body on the nutrition of the mammary 



1 Ann. d. I. Sci. Agron. 4e Serie, T. i, p. ,321, 1912. 



