C 76 3 r 



will rediffolve the precipitate, and form cuprum 

 ammoniacum. 



d. Upon adding a folution of Epfom fait, or 

 of nitrous or muriated magnefia, the precipitate 

 will be of a pale green colour. 



e. Upon adding a folution of nitrated or mu- 

 riated calcarious earth, the precipitate will be ftil! 

 of a more pale green colour. 



f. On adding a folution of Alum, a green 

 precipitate will be formed, with a tinge of blue 

 in it. In thefe three inflances, the earths unite 

 with the acid, and the copper is precipitated. 



g. If a folution of arfenic in water be added 3 

 clouds of yellowifti green colour will be formed, 

 -and a fubftance of the fame colour will be pre- 

 cipitated. This is called fcheel's green. 



h. On adding a folution of volatile liver of 

 fulphur, clouds of a blackifh brown hue will be 

 formed, and a precipitate of the fame colour fall 

 to the bottom ; 



i. Or if water, impregnated with hepatic air, 

 be added, the fame effect will take place. 



k. On adding a little of the Pruflian lixi, 

 vium, a precipitate of a brown colour will be 

 depofited. 



B. 1. The nature of the acid may be detected 

 by adding a folution of muriated ponderous 

 earth, nitre of filver, and the other means men- 

 tioned (page 49, a e b. Sec.) 



VITRI- 



