35 
some other saline stony substances, viz, carbonate 
of magnesia, called also pure magnesia, and mag¬ 
nesite, Borate of magnesia, or boi'acite, in sepa¬ 
rate crystals, and the same imbedded in gypsum; 
—hy dr argillite or wavellite^ which may be consi¬ 
dered as a phosphate of alumina ; azurite and 
blue spar (Werner’s lazulit and blauspath), which 
appear to be phosphates of alumina, magnesia, 
and silica; aluminite, a subsulphate of alumina, 
from Sussex, and from Halle in the territory of 
Magdeburg, which was formerly mistaken by 
some for pure alumina, by others for hydrate of 
alumina with mechanically admixed sulphate of 
lime : it must not be confounded with alum-stone 
(alunite of French mineralogists), which, accord¬ 
ing to Cordier, is a hydrate of alumina with an¬ 
hydrous sulphates of alumina and potassa. Fluate 
of soda and alumina, or cryolite (found only in 
West Greenland), pure and intermixed with 
brown iron-stone, galena, &c.;— mellite or honey- 
stone,^ which is said to be geognostically related 
to amber, but is a mellate of alumina.— Glaube- 
rite (a compound of anhydrous sulphate of lime, 
and anhydrous sulphate of soda), imbedded in 
white and blue rock salt, &c.;— poly halite of 
Stromeyer, a chemical combination of several 
salts, formerly considered as anhydrous sulphate 
of lime. 
Case 28 contains various saline minerals, 
among the more remarkable of which are the 
African trona (carbonate of soda), the fibrous 
D 2 sulphate 
SALOON. 
Nat. Hist. 
