fiUPATORlUM PERFOLIATUM. 29 



tate; muriate of tin recently prepared caused 

 a precipitate ; nitrate of mercury formed a co- 

 pious white precipitate ; with muriate of ba- 

 rytes a slight turbidness was formed ; oxalate 

 of ammonia likewise caused a precipitate ; by 

 sulphuric acid a slight turbidness was discerni- 

 ble; neither tartarised antimony, nor pure 

 ammonia produced any sensible effect ; with 

 pure potash a greenish brown colour was ef- 

 fected ; gelatin formed no immediate precipi- 

 tate ; a solution of nitrate of silver formed 

 a whitish precipitate ; chromic acid caused a 

 copious precipitate of a greenish brown co- 

 lour; the nitrate of lead formed a very co- 

 pious precipitate ; a solution of the carbonate 

 of potash produced a brown colour- 



EXPERIMENT XII. 



An infusion of the leaves produced the 



following appearances with re-agents. A red 



colour was induced, by an infusion of litmus; 



a solution of the sulphate of ii'on formed a 



5 



