2$o ESSAYS AND OBSERVATIONS 



nerve were very accurately rejoined, with- 

 out indeed reftoring, to the parts behind, 

 their loft fenfe and motion. 



E X P E R. XIII. 



It remains to examine how far ani- 

 mals are affected by the abforption of o- 

 pium, and its mixture with their circu- 

 lated blood. 



But, previous to this inquiry, I 

 thought it might be of ufe to know what 

 effect opium has when applied to the 

 heart and vafcular fyftem* 



(Four Trialj,) 



1 therefore laid bare the heart, and therr 

 inje(5ted into a large vein, which runs a- 

 long the under middle part of the abdo- 

 men on the outer fide of the peritoneum, 

 a few drops of the folution, vir. 12 drops 

 into that vein of two frogs, and fix into 

 that of two others ; an4 obferved, that, 



as 



