EUPATORIUM PERFOLIATUM. 25 



re-ag;ents was in nowise different from those 

 noticed in experiment the fourth. With the 

 carbonate of potash, however, which was now 

 employed, an ochre yellow was produced. 



EXPERIMENT VII. 



The brownish matter, not taken up by the 

 alcohol in the last three experiments, was dis- 

 solved in distilled water in separate vessels ; 

 a portion of a dark brown substance was left 

 from each. These watery solutions, after hav- 

 ing been evaporated to dryness, left a hard 

 brittle extract, of a brown colour, which, upon 

 being re-dissolved, possessed a sweetish taste. 



EXPERIMENT VIII. 



A portion of the alcoholic solutions men- 

 tioned in the fourth, fifth, and sixth experi- 

 ments, was evaporated nearly to dryness ; a re- 

 sinous matter was left of a yellowish brown 

 colour, an extremely bitter taste, and com- 

 pletely soluble in warm water. These watery 



