272 



Kojima 



Table III. 

 C Group (Thyroidectomised). 



In connexion with these tables it is to be noted that variations in the 

 amount of food within the stomach (which always contains food in the 

 rat) cause large differences in the body- weight, the stomach of the rat being 

 large in proportion to the size of its body. Care was taken, however, to 

 weigh all the animals at the same time of day, viz. between 3 and 4 p.m. 

 As is seen in the tables, the weights of the rats belonginof to the various, 

 groups did not undergo much change during the first fortnight, when the 

 animals were fed with a diet composed of rusks and lean meat. But after 

 seven days' thyroid feeding all the weights showed greater or less decrement, 

 doubtless owing to the diminished appetite. The loss of weight is least 

 in the thyroidectomised rats ; greatest in the parathyroid ectomised. 



Since two of the rats which had been fed with thyroid and were in- 

 tended for control purposes died during the parathyroid feeding (probably 

 as a result of the previous thyroid diet), there was only one thyroidectomised 

 animal to compare with three parathyroidectomised ones in this period of 

 the experiment. 



It appears from the tables that parathyroid feeding made very little 

 difference to the weights of the parathyroidectomised rats (B group). 



Effects of Parathyroid Feeding on Pancreas. 



The remaining animals of each group (A, B, and C) were fed as before 

 with rusks, but in place of the addition of thyroid material, 01 grm. of dry 

 ox-parathyroid per rat per diem was added to the diet. This feeding 

 lasted for a week (April 1-7). During this third period the appetite 

 of all the animals gradually improved. But one rat of the A group and 

 two of the B group continued to suffer from diarrhcea for two or three 



