31 S ESSAYS AND OBSERVATIONS 



hour, it fcarcely difcovered any outward 

 fign of life ; though the heart was found 

 to contradl feebly about ten times in a 

 minute, five or fix hours thereafter. 



E X P E R. VIII. 



Having, by the laft experiment, dif- 

 covered a method by which this animal 

 is affedled to a violent degree v^ith opium, 

 in a fliorter time than that in which the 

 energy of its nerves is confiderably im- 

 paired by [putting a flop to the circula- . 

 tion ; I could now determine, with cer- 

 tainty, whether this animal could be af- 

 fe(5led in that violent degree through the 

 nerves to which the opium was primarily 

 applied, independent of the abforption 

 and circulation of the blood, by cutting 

 out the ventricle of the heart, and fo flop- 

 ping the circulation, before I poured the 

 folution into the cavity of the abdomen. 

 A nd, on feveral trials, I found, that the ani- 

 mal was in this way affe(5led as in the lafl 



experiment^ 



