EUPATORIUM perpoliatum. 33 



that from the root, which was continued to 

 dryness, an extract was left in the retorts of a 

 dark colour and of a very bitter taste. Upon 

 the addition of solid caustic soda, fumes resem- 

 bling burning sugar were disengaged, and in a 

 few minutes after the smell of ammonia was 

 very evident. 



EXPERIMENT XVIII. 



The flowers, leaves, and roots that were used 

 in the cold watery infusions, after having 

 been repeatedly washed, were put in separate 

 retorts, and a quantity of distilled water add- 

 ed to each. They were placed in a sand bath, 

 and distilled ; after nearly one half had come 

 over, the receivers were removed, and fresh 

 receivers luited to the retorts. The first part 

 of the distillations appeared clear, had no 

 taste, and but very little smell. The follow- 

 ing re-agents had no effect upon them ; viz. 

 the infusion of litmus, a solution of the sul- 

 phate of iron, carbonate of potash, nitrate of 

 silver, and acetate of lead. 



