12-i 



EXPERIMENTAL PHARMACOLOGY 



and allow some of the vapor to escape. Then refill the pan 

 with oxygen. This method is new. Students are advised to 

 study it carefully. Is there any danger of the respiratory 

 medium becoming too moist ? Are any volatile poisons 

 given off in the breath that might accumulate in the breath- 

 ing space? Will the smaller percentage of nitrogen in the 

 air breathed bv the animal influence the anesthesia f Will 



-Efher 

 inlet 



Oxyqen 

 inlet 



flanqe 



Fig. 118. Diagrammatic view of the pan as seen from above. 



the respiratory medium become too warm! Could you 

 counteract this! How is the ether excreted! How is it 

 absorbed and carried to the tissues! What combinations 

 does it form in the body ? 



2. Arrange to record blood-pressure and respiration 

 (stethograph). Connect an injecting burette to the left 

 femoral vein. Isolate and ligate loosely (but do not clamp 

 or injure) the right femoral artery. Place some adrena- 

 line (1:10,000) solution in the burette. Or epinine solu- 

 tion (1:1000, Burroughs, Wellcome and Co.) may be used. 



