302 ESSAYS AND OBSERVATIONS 



frogs are affeded by the abforption of 

 opium and its circulation with their blood, 

 being unluckily performed on them after 

 there was little or no abforption, and the 

 circulation of their blood had intirely cea" 

 fed, he was led to conclude, contrary 

 perhaps to what a perfon of his knowledge 

 and penetration would, without fuch a 

 deceitful experiment, have done, that the 

 effedls of opium in that way were altoge- 

 ther incoiifiderable, when compared with 

 thofe occafioned by its adlion on the 

 nerves to which it is primarily applied. 



Henge, although the Dodlor has firll: 

 given unqueflionable evidence of the fur- 

 prifing effecfls which opium has, indepen- 

 dent of the circulation ; yet he has by no 

 means proved that opium has no effedl,^ 

 or only a very inconfiderable one, in a 

 found animal, fo far as it is abforbed and 

 mixed with the mafs of blood. 



EXPERs 



