PHYSICAL ann LITERARY. 337 
wifcera of the lower belly are expofed to 
its action. 
(4) ALTHo’ it feems probable, from 
N® 22, compared with N° 24. that a folu- 
tion of opium injected into the veins of 
dogs does not kill them fo foon as when 
_ thrown into the cavity of the abdomen ; 
yet this cannot be certainly concluded, 
fince the dog of N° 24. was much older 
and above ten times heavier than the o- 
ther. 
(m) IT appears, that a folution of o- 
_ pium injected into the great guts of a dog, 
_ affects the inferior part of the {pinal mar- 
row much more remarkably than its fu- 
perior part, or the brain; fince the dogs 
of N° 21. and 22. not only loft the power 
of motion fooner in their hinder legs than 
in their fore ones, but alfo were infenfible 
of any pain in them, and yet howled 
_ ftrongly when their ears were pinched. 
(a) A folution of opium injected into 
the cavity of the abdomen or great guts - 
f dogs, does not deftroy the feeling and 
ower of motion of their hinder limbs, 
by fending any effluvia to their mufcles; 
Vou. II. Uu other~ 
