[ 6o ] 



quiring in time a bluifh appearance, as defcribed 



(P a g e 53> b 



e. Or by adding a little of the folution of 



quickfilver in nitrous acid, white clouds will im- 

 mediately appear, and the fame appearances take 

 place as defcribed (page 53, c.) 



f. Upon adding a little of the folution of blue 

 vitriol, the precipitate of the pale green colour* 

 above defcribed, will appear. 



4. MAGNESIA; 



O R 



Magnefia combined with fixed air, 



Synonymous Names. 

 Magnefia alba. 

 Common magnefia. 

 Mild or effervefcing magnefia, 

 Magnefian earth. 

 Aerated magnefia. 

 MAGNESIA. <( Magnefian chalk. 



Muriatic earth. 

 Cretacious magnefia. 

 Mephite of magnefia. 

 Carbonated, or carbonate of 



magnefia. 

 .Magnefian carbonate, Sec. 



Magnefia is found no where pure, but, com- 

 bined with other earths, it is found in abundance 

 in nature, in a variety of forms : it is found in 

 the mother water of nitre, and in the other ftates 

 mentioned in the two preceding pages. 



A. a. 



