Studies on the Endocrine (J lands 



271 



are singularly scanty throuijhout. Many cells show vacuoles in their 

 cytoplasm. There appears to be no change in the islets. 



Later, another thyroidectonii.sed rat in this series of experiments was 

 dieted with thyroid addition during si.\ days, and then killed and the pan- 

 creas e.xaniined. The cells .showed changes similar to tho.se above detailed, 

 although the mitoses were relatively fewer in number. In this case also 

 the weight of the animal diminished as the result of the thyroid feeding. 



The weights of the respective groups at different periods are shown 

 in Tables I., II., and TTT. 



Table I. 

 A Group (Control). 



Table II. 

 B Group (Parathyroidectomised). 



VOL. XL, NOS. 3 AND 4. — 1J17. 



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