Studies on the Endocrine Glands 



299 





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Fio. 21. — Section fioiii j)ancreas of rat (male) fed witli an addition to the ordinary diet 

 ofO'l grm. of potassium iodide per diem during five days. This is from the same 

 pancreas as that shown in fig. 20, hut is stained witli MaUory instead of baema- 

 toxylin, and is magnified only 120 diameters. 



The section shows considerahle diminution in the amount of zymogen as com- 

 pared with the normal (fig. 4). 



Fig. 22. — Section from the same pancreas as that shown in fig. 21, and, like that, stained 

 with Mai lory, hut magnified 450 diameters. 



The preparation shows the marked diminution in the amount of zymogen in the 

 alveolar cells, in which, in consequence, the nuclei are more evident. The small, 

 darkly stained bodies are red blood-corpuscles. 



