THE PITUITARY BODY 



Vitamins 



and growth, 42 



X-rays 



effects of, on pituitary, 31, 62 



X-zone of mouse adrenal 



and anterior pituitary, 200-201 

 effect of oestrogens on, 201 



Yeast 



augmentation of action of gonado- 

 tropic hormone by ash or extract 

 of, 1 1 8 



Yohimbine 



effect of, on chromatophores, 251 



Zinc 



deficiency of, and growth-promoting 

 hormone, 42-43 



Zinc salts 



augmentation of action of gonado- 

 tropic hormone by, 118 



augmentation of action of vasopressor 

 principle by, 270-71 



