120 
NATURAL HISTORY. 
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Spain, &c.— Nitrate of soda.—Sulphate of soda, orglauher 
salt. — Thenardite, a hydrous sulphate of soda, found in 
crystalline crusts, at the bottom of the briny waters at 
the Salines d’Espartines, five miles from Madrid ; —glau - 
berite, a mineral composed of the anhydrous sulphates of 
soda and of lime, from the salt mines of Villarubia and 
Aranjuez in Spain, embedded in salt and clay.-—Among 
the specimens of sulphate of strontia, or celestine, the 
more remarkable are, the splendid groups of limpid pris¬ 
matic crystals from La Catolica in Sicily, accompanied by 
sulphur; those from the vicinity of Bristol, from St. Beat 
in the Dep. des Landes; those from Falkenstein in Tyrol ; 
from the salt mines of Aranjuez; the acicular variety in 
the hollows of compact sulphate of strontia from Mont¬ 
martre ; in the fissures of flint and in chalk, from Meu- 
don; the radiated and fibrous celestine from Pennsyl¬ 
vania, &c. 
Case 56. The whole of this Case is occupied by the 
sulphates of baryta, {barytes ox heavy-spar,') among which 
may be specified the splendid groups of straight-lamellar 
crystallised heavy-spar, especially those from Schemnitz in 
Hungary, and Clausthal in the Hartz, Traversella in Pied¬ 
mont, &c. ,* the curved-lamellar varieties; the columnar, 
resembling carbonate of lead; the radiated, to which be¬ 
longs the Bolognese spar, from Monte Paterno, near 
Bologna, from Bavaria, &c.; the beautiful variety called 
hetten-spath, or chain-spar, from the Hartz; the fibrous 
and the granular varieties; the compact, called barytic or 
ponderous marble, &c.; fetid barytes or hepatite, an inti¬ 
mate mixture of sulphate of baryta with bituminous 
matter; earthy barytes : also the wolnyne from Muzsay 
in Hungary is a variety of sulphate of baryta. 
Case 57 contains the sulphates of lime, the principal 
varieties of which are,—the selenite or sparry gypsum, in 
detached crystals and splendid groups, from Bex in Swiss- 
erland, Montmartre near Paris, Oxford, &c.; from St. 
J ago di Compostela, stained by red iron ochre; the fibrous 
gypsum with silky lustre, from Derbyshire, Swisserland, 
Montserrat; the granular gypsum or alabaster; the com¬ 
pact variety, to which belongs the stalagmitical gypsum 
from Guadaloupe ; the scaly gypsum (chaux sulfatee nivi- 
forme of Haiiy) from Montmartre ; common earthy gyp¬ 
sum, &c.— Anhydrous sulphate of lime , also called anhy- 
