176 
NATURAL HISTORY. 
[north 
pur, in the province of Khorasan, Persia, in nodules or as small veins 
traversing a ferrugino-argillaceous rock, and greatly esteemed on ac¬ 
count of its beautiful blue colour, which will in most cases be sufficient to 
distinguish it both from the blue silicate of copper and from fossil bones 
(particularly teeth) impregnated with blue phosphate of iron or carbonate 
of copper, some of which substances are vulgarly called occidental tur¬ 
quoises.—The hakoxene , a rare substance of a crystalline diverging- 
fibrous structure and yellow colour, found in the fissures of argillaceous 
iron-stone, near Zbirow in Bohemia ;—and the childrenite from Tavi¬ 
stock, in Devonshire : both which mineral substances contain alumina 
and oxide of iron combined with phosphoric acid, but require to be sub¬ 
jected to closer chemical examination .—Phosphate of oxide of uranium : 
-—to these belong the yellow uranite or uran-mica from Autin, Limoges, 
Bodenmais ; and the green uranite , or chalcolite , chiefly from Cornwall 
and Saxony : both of them phosphates of oxide of uranium, but dis¬ 
tinct by containing, the former a small portion of phosphate of lime, and 
the latter an equivalent portion of phosphate of copper. 
This Case also contains the nitrates and part of the sulphates. Ni¬ 
trate of potassa , native nitre or saltpetre , found as efflorescence, mixed 
with other nitrates, and as crystalline crusts ; from Pulo di Molfetta in 
Apulia, from near Burgos in Spain, &c .—Nitrate of soda.—Sulphate 
of soda , or glauher salt.—Thenar dite, 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;— glauberite , a mineral composed 
of the anhydrous sulphates of soda and of lime, from the salt mines of 
Villambia 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 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 55. The whole of this Case is occupied by the sulphates of 
baryta , (baroselenite or heavy-spar,') among which may be specified the 
splendid groups of straight-lamellar crystallized heavy-spar, especially 
those from Schemnitz in Hungary, and Clausthal in the Hartz, Traver- 
sella in Piedmont, &c.; the curved-lamella varieties; the columnar, 
resembling carbonate of lead; the radiated, to which belongs the Bo¬ 
lognese spar , from Monte Patemo, 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. ; fetid baroselenite or hepatite , an intimate mix¬ 
ture of sulphate of baryta with bituminous matter ; earthy baroselenite: 
also the wolnyne from Muzsay in Hungary, a variety of sulphate of ba¬ 
ryta. 
Case 56 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 Swisserland, Montmartre near Paris, Ox¬ 
ford, &c. ; from St. Jago di Compostela, stained by red iron ochre; 
the fibrous gypsum with silky lustre, from Derbyshire, Swisserland, 
