THE KINETIC SYSTEM 195 



system. In no other phase of health or disease does 

 the thyroid gland appear to manifest so definitely 

 that its role is that of pacemaker for the kinetic system. 

 In this disease the gland appears to be pouring into 



A. B. 



Section of normal adrenal of dog. Section of adrenal of dog after 



injection of iodoform. 



FIG. 44. EFFECT OF IODOFORM ON THE ADRENALS OF A DOG. 



Note the widespread loss of cytoplasm and the vacuolation of some cells 

 in B. 



(From photomicrographs, X 1640.) 



the blood a continuous secretion which sensitizes the 

 brain, causing it to respond abnormally to environ- 

 mental stimuli, this activity in turn serving to reexcite 

 the thyroid and the adrenals, thus completing a vicious. 



