PLATE 1 



All photographs were taken with a 2 mm. oil immersion objective; magnifica- 

 tion X 900. 



Figs. 1, 2, 4, 5, 9, 17 were taken from Altmann-Masson preparations; figs. 3, 7, 

 8, 12, 13, 16 from Nassonov-Kolatchev preparations; figs.'G, 10, 11, 14, 15, 18, 19, 

 20 from section stained by Mallory-Azan method. 



Figs. 1 to 6 represent the sequence of changes observed in basophils after 

 thyroidectomy. 



Figs. 10 to 14 represent the sequence of changes observed in basophils after 

 castration. 



Figs. 7 and 8. Highly reticular and diffuse Golgi apparatus found in the baso- 

 phil of thyroidectomy. 



Fig. 9. Thyroidectomy basophil. 



Note the distribution of mitochondria in the remaining part of the cytoplasm 

 near the nucleus and between vacuoles. 



Figs. 15 and 16. Negative image and a positively impregnated Golgi apparatus 

 of the yoimg castration basophil without the vacuole. 



Fig. 17. Note the general distribution and concentration of mitochondria in 

 the Golgi region of a young castration basophil. 



Figs. 18 and 19. Small early and achanced nuclear vacuolation found in the 

 basophil after thyroidectomy. 



Fig. 20. Castration basophil sho\\'ing vacuolation of the nucleus morphologi- 

 cally identical with that seen in the thyroidectomy basophil (fig. 18). 



[ 484 1 



