I 78 ] 



e. Upon adding the Pruffian lixivium, a dirty 

 white precipitate is formed, which becomes yel- 

 low in the fire, and becomes white again, on 

 cooling. The Pruffian lixivium will not preci- 

 pitate earths from folutions of earthy falts in 

 water. 



f. Liver of fulphur, or hepatic air, precipi- 

 tates zinc of a pale coffee colour. 



g. Moll of the precipitates of zinc will be 

 found to be volatile in the fire. 



ARSENIC. 



Regulusr of Arfenic combined with pure Air. 



Synonymous Names, 

 f White arfenic. 

 Calx of arfenic. 

 Flowers of arfenic. 

 t Lime of arfenic. 

 x Oxide of arfenic. 

 White oxide of arfenic. 

 Sublimed white oxide of arfenic, 

 .Oxygenated arfenic. 



Arfenic is found in fpring waters in the neigh- 

 bourhood of mines; and as fuch waters are ex- 

 tremely poifonous, it is important to detect it. 

 Arfenic is very foluble in water, on evaporating 

 the water it cryftallizes into triangular pyramida 

 cryflals of a yellowifli colour. 



a. If 



