20 DISSERTATION ON THE 



EXPERIMENT I. 



A decoction of the flowers, prepared in the 

 above manner, with an infusion of litmus form- 

 ed a red colour ; a solution of sulphate of iron 

 changed it to a dark green; an infusion of 

 galls formed a very slight precipitate; with mu- 

 riate of tin recently prepared, it caused a pre- 

 cipitate of a brownish yellow colour ; the ni- 

 trate of mercury formed a precipitate ; with 

 muriate of barytes a precipitate was formed ; 

 oxalate of ammonia produced a turbidness, 

 which was followed by a white precipitate ; 

 sulphuric acid formed a precipitate ; a solution 

 of tartarised antimony had no effect ; with pure 

 ammonia it acquired a green colour ; pure pot- 

 ash caused a brownish precipitate ; gelatin 

 produced a trifling precipitate ; a solution of 

 nitrate of silver formed a precipitate ; chromic 

 acid produced a copious olive green precipi- 

 tate ; the acetate of lead caused a light green ; 

 the nitrate of lead induced a slight precipitate ; 

 with the carbonate of potash a precipitate also 

 was formed. 



