Studies on the Endocrine Li lands 



323 





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Fir;. 2. — Sectiun ot" pais .ulterior ol jiiUiitary b^dy of a inak' rat wliicli liad been subjectc'l 

 to thyroidectomy. i\licro{)hotograi>h ; magnitied 500 diameters. Htematoxylin-eosin 

 I>re pa ration. 



As compared with fig. 1 , it is noticeable that many of the cells are enlarged. These 

 enlarged cells are stained a faint ]>i!ik by iKematoxylin-eosin, and in the photograph 

 ajipear lighter than the rest. Clear vesicles are also to be seen containing a tliin hyaline 

 material 'I'he darkly stained masses are blood-vessels full of blood-corpuscles. 



% 





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Fig. 3. — .Section of pars anterior of pituitary body of rat (male) after parathyroidectomy. 

 Microphotograph ; magnified :'00 diameters. Htematoxylin-eosin jaeparation. 



Although most of the cells remain sniHll, a certain number are greatly swollen, 

 showing vacuolated cytoplasm and faintly stained nuclei. 



