GALLERY.] 
natural history. (Minerals.) 
79 
" 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¬ 
bonate 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 very 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, Sfc .;) this case contains part 
of the sulphates :— sulphate of soda, or glauber salt; — thenar dite, an 
anhydrous sulphate of soda, found in crystalline crusts, at the bottom of 
the briny waters of Espartines in Spain, five leagues 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 caes, 
is occupied by sulphates of baryta or baroselenite, ( heavy-spar ), 
among which may be particularized the splendid groups of crystal 
from Schemnitz in Hungary, and Clausthal in the Hartz, Travers- 
ella in Piedmont, the large very perfect crystals from Dufton, Cum¬ 
berland, &c.; the curved-lamella varieties; the columnar, resem¬ 
bling carbonate of lead ; the radiated, to w T hich 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 barytic or 
ponderous marble, &c. ; the cawk of Derbyshire and Staffordshire ; 
fetid baroselenite or hepatite, an intimate mixture of sulphate of baryta 
with bituminous matter ; earthy baroselenite :—also the wolnyne from 
Muzsay in Hungary is only a variety of sulphate of baryta. 
Case 53. Sidphate of baryta continued, 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 
* A remarkably fine group of selenite crystals is placed on a separate stand be¬ 
tween Table 54 and the window : it is from Herzog Ernst level, Reinhardsbrunn, 
Saxe-Coburg. Presented by H. R. H. Prince Albert. 
