Sg et 
PHYSICAL ano LITERARY. 345 
are owing to an unufual irritation of the - 
parts of the body, and, at the fame time, 
promoting thofe natural fecretions which 
have been diminifhed or {ftopt by {pafmo- 
dic ftrictures of the veflels, from fome 
uncommon flimulus affeCing them. 
_ ‘ (w) Last iy, does not opium kill ani- 
- 
oi ieee tes ft ese ee 
mals by rendering their feveral organs 
wholly infenfible of the /fimuli, which are 
deftined by nature to excite. them into 
aétion ; whence not only a ftop is put to 
the periftaltic motion of the guts, and 
_to the propulfion of the chyle*, but the 
Wik Lda BRS Regeings fluids 
* "In a {mall dog, which Dr Kauu Boerhaave opened, 
after having given him three grains of opium, he obfer- 
ved fearce any periftaltic motion in the guts: The fto- 
mach was much diflended ; the pylorus was fhut, and 
the bread and milk, which the dog lad taken with the 
opium about ten hours betore, was indigefted. ‘There 
was nothing like chyle in the duodenum, nor any lacteal 
. veffels to be feen inthe mefentery. The bladder of urine 
and great guts were much filled, nor had-the animal 
evacuated either urine or feces from the time he fwal- 
lowed the gpium. Impetum faciens Hippocrati dium, 
p- 402. and 403, The learned Dr Haller has alfo obier- 
ved, that opium puts a ftop to the periftaltic ‘motion of 
. the guts in frogs and other animals, Act. Gotting. vol. 2. 
Ps 154, 
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