298 



Kojima 



Potassium Iodide. 



An experiment similar to that with sodium iodide was made with 

 potassium iodide, 0*1 grm. being administered to two rats (Nos. 64 and 65) 

 for three and four daj^s respectively, and to two others (Nos, 66 and 67) for 

 five days. Beyond slight diarrhcea, which began on the fourth day, no 

 special symptoms were observable, and there was no important difference in 

 weight at the end of the time (Table XVI.). 



Post-mortem. — The duodenum is congested in 64 and 65, but in the 

 others there is nothing noticeable. 



Table XVI. 



1 Killed on this date. 



5 ift '" !• 









Fig. 20. — Section of pancreas of rat (male) fed with an addition to its ordinary food of O'l 

 grm. of potassium iodide per diem during five days. Microphotograph ; magnified 

 400 diameters. Hsematoxylin preparation. 



Most of the alveolar cells are small, but their nuclei are larger than normal ; they 

 stain deeply \yith hsmatoxylin. Many of them have central nucleoli. There is a 

 great diminution in the amount of zymogen, which is absent from many of the cells. 



