EFFECT OF DIVISION OF THE SPINAL COr.D. 



181 



the diminution in pressure Avas due to a weakened lieart, tlie 

 inhalation of the nitrite should at once cause a diminution in 

 the pressure to which the blood had attained after compression 

 of the aorta. As only the circulation in the lower part of the 

 body was in this way cut off, we cannot expect that lu) siukinc,^ 

 should take place, but only that it should be less tlir.n tlie 

 normal. In order to diminish the error from this source, tliese 



Fig. ilO. 



•lulialation begun. x Inhalation stopped ; at the beginning of the last 



three observations the aorta was compressed. o Aorta opened. 



