+ Par 
PHYSICAL anv LITERARY. 339 
fpeedily as when the brain and fpinal 
marrow are intire, N° 11. .and12. In 
the former cafe, the opium can only af- 
fect the heart by its topical influence; in 
the latter, it not only acts this way, but al- 
fo exerts its powers upon the brain, fpinal 
marrow, and whole nervous fyitem ; and 
therefore muft produce more fudden ef- 
fects. : 
(i) Iv appears, beyond doubt, from the 
preceeding experiments, that the heart is 
not exempted from the power of opium, 
_as the learned Dr Haller has afirmed *,, 
_ but has its motion deftroyed by it, as well 
as the other mufcles, only not fo foon. 
See N° 4. and 5, compared with N° 3. 6, 
8. and ro. and N° 14. tg. and 16. comi- 
pared with N° 17.18. 19. and 20. 
IT is true, that the fibres of the inter- 
coftals on the right fide of the ffernum of 
the dog N° 22. continued to be agitated 
with a tremulous motion confiderablyy 
longer than the heart, and when the in- 
tercoftal mufcles attached to the ribs were © 
quite dead. But did not this happen be- 
| eaule, 
* A&, Gotting, vol. 3. p.147. and 154. . 
amet 
