EUPATORIUM PERFOLIATUM. 27 



of a whitish yellow colour, and in large quan- 

 tity, was induced ; with a solution of sulphate 

 of iron an abundant dark green precipitate 

 was formed; tartarised antimony formed a 

 greenish brown precipitate; nitrate of silver 

 formed a copious whitish yellow precipitate ; 

 a reddish brown precipitate was readily pro- 

 duced by the muriate of tin. 



EXPERIMENT X. 



The solution of the resinous matter obtain- 

 ed from the root was likewise subjected to the 

 . operation of the same re-agents. With carbo- 

 nate of potash no effect was visible ; barytic 

 water formed a slight precipitate : an infusion 

 of litmus, as in the leaves, caused no change : 

 with the acetate of lead a slight precipitate 

 was formed ; nitrate of lead produced scarcely 

 any turbidness ; the sulphate of iron induced 

 a green precipitate ; tartarised antimony had 

 ho effect ; the nitrate of silver formed a trifling- 

 precipitate; no precipitate was visible from 

 gelatin, though readily produced by the action 



