344 ESSAYS and OBSERVATIONS 



time, weakened the nervous power of the 

 chxulating fyftem. 



EXPER. II. {One Trial), 



Thirty drops of the mixture being 

 poured into the cavity of the abdomen, 

 the animal feemed immediately very un- 

 eafy, and, after 20 minutes, could hardly 

 remove its body from the place where it 

 lay. But, after fix hours, it had greatly 

 recovered, and was able to jump with 

 confiderable force. 



REMARKS. 



I, Since frogs are lefs affedled by fpl- 

 rits poured into the cavity of the abdo- 

 men, than by the folution of opium, and 

 yet the former irritates the organs of our 

 fenles more than the latter, we learn, that 

 opium affedls thofe animals not fo much 

 by its irritation, as by its fingular an*d 

 unknown influence. 



2. It 



