30 DISSEKTATION ON THE 



very dark green precipitate; oxalate of am- 

 monia caused an immediate and copious pre- 

 cipitate; sulphuric acid formed a slight tur- 

 bidness ; pure ammonia foi;'med a greenish 

 colour ; gelatin formed a precipitate ; nitrate 

 of silver formed a very copious precipitate; 

 carbonate of potash formed a brown precipi- 

 tate; with the infusion of galls, muriate of tin, 

 nitrate of mercury, muriate of barytes, tartari- 

 sed antimony, pure potash, chromic acid, and 

 the nitrate of lead, effects similar to those 

 enumerated in experiment the eleventh were 

 produced. 



EXPERIMENT XIII. 



With an infusion of the root, prepared 

 after the manner of the two preceding ex- 

 periments, the following effects were pro- 

 duced. With an infusion of litmus, a red 

 colour vi^as formed ; nitrate of mercury form- 

 ed a greyish precipitate ; muriate of barytes 

 formed a precipitate ; oxalate of ammonia 

 formed no precipitate ; pure ammonia caused 



