35 
groups of double six-sided pyramids, and those of 
six-sided prismatic crystals. 
( Case 27.) Strontian salts : carbo?iate of stron- 
tian, also called strontianite, in prismatic and aci- 
cular crystals, which latter have sometimes been 
mistaken for arragonite.—Among the sulphates 
of strontian (celestine of Werner) the more re¬ 
markable specimens are, the splendid groups of 
limpid prismatic crystals from La Catolica in 
Sicily; the acicular variety in the hollows of com¬ 
pact sulphate of strontian, from Montmartre; the 
same in fissures of flint; the radiated and fibrous 
celestine, &c. 
The remainder of this case is occupied by some 
other saline stony substances, viz. carbonate of 
magnesia, called pure magnesia, and magnesite; 
borate of magnesia, or boracite, in separate crystals, 
and the same imbedded in gypsum ; hydrargillite 
or wavellite , which may be considered as a phos¬ 
phate of alumine ; alumbiite, a subsulphate of alu¬ 
mine, from Sussex, and from Halle in the territory 
of Magdeburg, which was formerly mistaken by 
some for pure alumine, by others for a hydrate of 
alumine with mechanically admixed sulphate of 
lime; fluate of soda and alumine, or cryolite , pure 
and intermixed with brown iron-stone, galena, &c.; 
mellite or honey stone, which is said to be geogno- 
stically related to amber, but is a mellate of alu¬ 
mine.— Glauberite, imbedded in white and blue 
d 2 rock 
SALOON. 
Nat. Hist. 
