250 MAN AN ADAPTIVE MECHANISM 



its administration ; it immediately impairs the im- 

 munity of the patient, since it anesthetizes the 

 phagocytes as well as the patient, and leaves the 

 organism in the position of a citadel threatened by 



A. 



Section of the normal 

 liver of a dog. 



B. 



Section of liver of a 

 dog after the continuous 

 administration of ether 

 for four hours. 



C. 



Section of liver of a 

 dog after the continuous 

 administration of ni- 

 trous oxid for four hours. 



FIG. 61. COMPARATIVE EFFECTS OF ETHER AND OF NITROUS OXID 

 ON THE LIVERS OF DOGS. 



Although the conservative effect of nitrous oxid is not as evident in the 

 liver as in the adrenals or the cerebellum, yet here also the disappearance 

 of cell substance and of nuclei is much more marked in B than in C. 



(From photomicrographs, X 1640.) 



attack while its defenders lie drunk in the trenches ; 

 it also extends the coagulation time of the blood and 

 makes the danger from hemorrhage more certain. 

 Being a fat solvent, ether dissolves many of the lipoids 

 in the brain, the renal epithelium, the liver and else- 



