EUPATORIUM PERFOLIATUM. 3 1 



no change; gelatin had no effect; nitrate of 

 silver caused the same change as in experi- 

 ment the eleventh ; nitrate of lead formed a 

 precipitate, though not so copious as with the 

 infusion of the flowers or leaves : neither the 

 carbonate of potash, nor muriate of ammonia 

 produced any sensible alteration. The effects 

 caused by the sulphate of iron, infusion of 

 galls, muriate of tin, sulphuric acid, tartarised 

 antimony, pure potash, and chromic acid, were 

 in no respects different from those already 

 stated in experiment the eleventh. 



EXPERIMENT XIV. 



Infusions of the flowers, leaves, and of the 

 root, prepared as in the last three experi- 

 ments, were put in separate retorts and dis- 

 tilled. After nearly one half had come over, 

 the receivers were changed, and the other 

 part in like manner distilled off. The first 

 three portions of the distillation were then 

 examined by a number of re-agents, without 

 the least sensible change being apparent. 



