Studies on the Eiid(KTine (Jhmds 329 



T.viiLK 11.— Weight of Pituitary Body after Castration and Thyroid Feeding. 



Gioujt 



No. of rat 



Days after castration 

 Body- weight in gnu. 



Weight of pituitary body 



in grni. 

 Weight of pituitary body 



per kilo of body-weix'ht 



The thyroid feeding does not appear to have had any influence on 

 the weight of the organ, wliich is somewhat increased by castration alone 

 (Table I.). 



Effects of Feeding Rats with Anterior Lobe of Ox-Pituitary. 



For this purpose dry anterior lobe of ox-pituitary was added to the diet 

 of normal rats. The most striking effect which it seems to produce is the 



Fig. 8. — Part of section of pars anterior of pituitary body of castrated male rat fed during 



twenty-nine days witli 3 grni. of fresh sheep-thyroid per diem added to its ordinary 



food. Microphotograph ; magnified 500 diameters. Hfematoxylin-eosin preparation. 



In this section several large cysts are seen containing a thin hyaline material. 



There are also some of the swollen cells described in the text. 



greatly increased number of oxyphil cells in the pars anterior — two-thirds or 

 more of all the cells being of this nature — most of them being considerably 



