186 MAN --AN ADAPTIVE MECHANISM 



clinically we know that in animals under deep morphia 

 narcosis and under anesthesia the production of 

 both heat and muscular action is hindered or pre- 



A. B. 



Section of normal cerebellum of Section of cerebellum of electric fish 

 electric fish. after electric discharge. 



FIG. 40. EFFECT OF ELECTRIC DISCHARGE ON THE BRAIN-CELLS OF AN 

 ELECTRIC FISH. 



Note the general disappearance of chromatic material and the almost 

 entire disintegration of some Purkinje cells indicated by arrows in B, 

 as compared with the definitely outlined cells of A. 



(From photomicrographs, X 310.) 



vented. In addition our experiments have shown 

 that the administration of morphia before the injec- 

 tion of toxins or drug stimulants minimizes the his- 



