34S ESSAYS and OBSERVATIONS- 



2. As we find it fo diflicult to prove 

 from experiments, on the thinly covered, 

 or otherwife more ealily aftecfled nerves 

 of the peritoneum, or of the lides of the 

 abdomen and abdominal vifcera, that fpi- 

 rits, applied to one part of the nervous fy 

 flem, can affedl the whole of it ; we need' 

 be lefs lurprized that their efjeds on the 

 nerves of the lldn covered by the cuticula, 

 after flopping the circulation, ftiould hav0 

 been but little obfervable. 



3. We obferve, that, when the blood- 

 veffels are tied, the animal is not affeded 

 in its fore part ; and hence v/e can aflign 

 jio part of the efFe(5ls of the fpii its, obfer- 

 ved in our firil experiment, to the paffage 

 of the fpirits through the pores of the 

 parts fo as to reach diftant organs. 



4. This experiment agrees with expe- 

 riment ninthwith opium, in proving that 

 the free motion of the blood in the veiTels 

 which accompany nerves enables the 

 perves to convey more readily the effecl 

 ot medicines to the diftant parts of the 

 nervous fyftem, or that the interruption 



