312 



Kojima 



The above description applies to the pancreas of the cock. In the 

 pancreas of the hens examined both the alveolar cells and their nuclei were 

 a little larger than those of the cock, and the zymogen granules much 

 more plentiful. Otherwise there was no appreciable difference in the 

 two sexes. 



In order to test the effects of thyroid feeding, two cockerels (Nos. 1 

 and 2), weighing respectively 450 grm. and 460 grm., after having been fed 

 for a week with maize and rusks alone, were fed, No. 1 with the addition 

 of 8 grm. of fresh sheep-thyroid per diem for ten days. No. 2 with an equal 



Fig. 28. — Section of pancreas of cock, normal. Microphotograph ; magnified 

 400 diameters. Mallory's stain. 



The alveolar cells are many of them full of zymogen granules which are 

 very darkly stained by the acid fuchsin. 



amount of lean mutton per diem for ten days. The appetite of cockerel 

 No. 1 showed a decrease from the third day of the thyroid feeding on- 

 wards ; the animal became inactive, and showed slight diarrhoea (after the 

 fourth day). Cockerel No. 2 exhibited no s3'mptoms. At the end of the 

 period of experiment their weights were respectively 440 grm. and 490 grm., 

 the weight of the thyroid-fed one being somewhat decreased and the one 

 without thyroid distinctly increased. 



Post-mortem the intestines of the thyroid-fed animal appear slightly con- 

 gested when compared with those of the one which received no thyroid, 



A similar experiment was made upon two other cockerels weighing 

 respectively 470 grm. and 395 grm., but with dried ox-thyroid ; 4-5 grm. 

 per cockerel per diem being administered during five detys. The appetites 

 of the animals showed a decrease on the third or fourth day, but there was 



