TABLE 1 



Observations on the Mammary Glands of Normal (N), Hypophysectomized (H) or 



Hypophysectomized-Oophorectomized (HO) Rats Injected 



WITH Various Hormones 



* L.HiS. L366B, and L384S =purified lactogenic hormone; L.3;i=a crude lactogenic preparation, 

 t D = regression, D.^B =maintenance, LA =lobulo-alveolar growth; number of rats in parentheses; plus signs indi- 

 cate grade of LA development. 



