GALLERY.] NATURAL HISTORY. 179 
with blue phosphate of iron or carbonate of copper (the 
occidental turquoises of lapidaries).—The kakoxene, a rare 
substance of a crystalline diverging-fibrous structure and 
yellow colour, found in the fissures of argillaceous iron¬ 
stone, nearZbirow in Bohemia ;—and the childrenite from 
Tavistock, in Devonshire : both which mineral substances 
contain alumina and oxide of iron combined with phos¬ 
phoric acid, but require to be subjected to closer chemical 
examination.— Phosphate of uranium to these belong 
the yellow uranite or uran-mica from Autun, Limoges, 
Bodenmais; and the green uranite, or chalcolite , chiefly 
from Cornwall and Saxony: both of them phosphates of 
oxide of uranium, but distinct 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 efflo¬ 
rescence, 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 glauber 
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- 
herite, 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 dint and in chalk, from Meudon ; 
the radiated and fibrous celestine from Pennsylvania, &e. 
Case 56. The whole of this Case is occupied by the 
sulphates of baryta, fbaroselenite or 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, Traver- 
sella in Piedmont, &c.; the curved-lamellar varieties ; the 
columnar, resembling carbonate of lead; the radiated, to 
