64 
NATURAL HISTORY. 
[north 
per ; the crystallized varieties from Siberia, Mies in Bohemia, &c.;— 
the pulverulent variety, &c. 
Case 50. In this and the following Case are deposited the car- 
bonates of copper, viz. the blue copper , or copper-azure, the more re¬ 
markable varieties of which are those from Chessy, and from the Ban- 
nat, combined with various substances:—the earthy varieties, some of 
which have been used as pigment sold under the name of mountain- 
blue ;—those crystallized varieties which, passing from the state of blue 
into that of green carbonate, have, by Haiiy, been called cuivre car- 
bnoate epigene. 
Case 51. The green carbonates of copper, among which may be 
specified the fine and rare varieties of fibrous malachite , in acicular crystals, 
and massive with fibrous structure and velvety appearance, accompanied 
by carbonate of lead, &c. ; and, among the specimens of compact mala¬ 
chite, those characteristic and splendid ones from the Gumashevsk and 
Turja mines, in the Uralian mountains. 
Case 52. Besides the nitrates, (such as the nitrate of potassa, na¬ 
tive nitre or saltpetre, found as efflorescence, mixed with other salts, 
and as crystalline crusts, from Pulo di Molfetta in Apulia, from near 
Burgos in Spain, &c. ; nitrate of soda, ;) this case contains part 
of the sulphates :— sulphate of soda, or glauber salt ;— thenardite, an 
anhydrous sulphate of soda, found in crystalline crusts, at the bottom of 
the briny waters at the Salines d’Espartines, five miles from Madrid ;— 
glauberite, a mineral composed of the anhydrous sulphates of soda and 
of lime, from the salt mines of Villarubia and Aranjuez in Spain, em¬ 
bedded in salt and clay. The rest of this, with half of the next case, 
is occupied by sulphates of baryta and baroselenite , denominated 
also heavy-spar, among which may be specified the splendid groups 
of straight-lamellar crystallized heavy-spar, especially those from 
Schemnitz in Hungary, and Clausthai in the Hartz, Traversella in 
Piedmont, the large very perfect crystals from Dufton, Cumberland, 
&c.; the curved-lamella varieties; the columnar, resembling car- 
oonate of lead; the radiated, to which belongs the Bolognese spar, 
from Monte Paterno, near Bologna, from Bavaria, &c. ; the beautiful 
variety called ketten-spath, or chain-spar, from the Hartz; the fibrous 
and the granular varieties; the compact, called barvtic or ponderous 
marble, &c. ; fetid baroselenite or hepatite, an intimate mixture of sul¬ 
phate of baryta with bituminous matter ; earthy baroselenite: —the 
wolnyne from Muzsay in Hungaiy, which is only a variety of sul¬ 
phate of baryta. 
Case 53. Sulphate of baryta and sulphate of strontia : —among the 
specimens of the latter salt, to which has been given the name of 
celestine, on account of the sky-blue tint of some of its varieties, the 
most remarkable are, the splendid groups of limpid prismatic 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 
Montmartre; in the fissures of flint and in chalk, from Meudon ; the 
radiated and fibrous celestine from Pennsylvania, &c. 
Case 54 contains the sulphates of lime, the principal varieties of 
which are,—the selenite or sparry gypsum, in detached crystals and 
