3<^o ESSAYS AND OBSERVATIONS 



ber of veflels, nor, perhaps, can any uni- 

 verfal rule be formed ; each organ feem- 

 ing to be endowed with its peculiar 

 fenfe. 



S' All the above named medicines can 

 afFed animals in two ways : And all can 

 affed them in either way to fuch a de- 

 gree, as to render them infenfible and 

 motionlefs ; or, if long enough applied, 

 to kill them. 



One way, is by adling on thefe nerves 

 to which they are primarily applied, fo as 

 to bring all the other nerves to fympa- 

 thize, independent of their mixture with 

 the blood. 



The other way, is by their being ab- 

 forbed, mixed, and conveyed with the 

 blood, independent of any influence on 

 the nerves of the part to which they are 

 primarily applied. 



6. But, as animals are fooneft, and 

 to thegreatefl degree, affeded by thofe 

 medicines, whilft the abforbent, the cir- 

 culating and the nervous fyftems all 

 duly exercife their fundions j it follows 



thence 



