OF ARTS AND SCIENCES. 



17 



Analysis No. II. 



Treated as before ; filtrate pale blue, precipitate, a brighter green 

 than No. 1. 



Analysis No. III. 



Treated as before ; filtrate pale yellow, precipitate had more of a 

 yellowish tinge than before. 



Analysis No. IV. 



Copper oxide, 

 Arsenic trioxide, 

 Sulphur trioxide. 

 Water, 



CuSO,5H20, 

 K..CO3, 



ASgOg, 



VOL. XII. (n. 8. IV.) 



