PHYSICAL AND LITERARY. 315 



though opium may remove thofe fpafms 

 for theprefent ; its frequent ufe, for certain, 

 greatly increafe? the caufe of them, or 

 makes them return with double frequen- 

 cy and violence. But, where we are obli- 

 ged to give opium in fuch cafes, for in- 

 fiance, to check immoderate vomiting or 

 purging, occafioned by degenerating pu- 

 trid aliment, and to procure ileep, I ima- 

 gine it will be generally better to give it in 

 a clyfter than by the mouth ; fince, in the 

 latter way, it fingularly debilitates the 

 whole alimentary canal, and prevents it 

 from being able, in the mean time, to expel 

 properly the remains of the putrid ferment. 



E X P E R. VIL 



Having obferved the effecfls of the o- 

 pium on an intire animal, we Ihall next 

 endeavour to difcover how far thofe effecfls 

 can be produced by the a<5tion of the opi- 

 um on the nerves to which it is primarily 

 applied, independent of the circulation of 

 the blood, that is, when the circulation 



is 



