GALLERY.] 
natural history. (Minerals.) 
77 
of soda, from variouslocalities.— Carbonate of baryta or witherite, among 
the specimens of which may be particularized the beautiful groups of 
double six-sided pyramids, and those of six-sided prismatic crystals. 
—Barytocalcite , from Alston Moor in Cumberland.— Carbonate of 
strontia , called strontianite , chiefly from Strontian in Argyleshire, in 
prismatic and acicular crystals, which latter have sometimes been mis¬ 
taken for aragonite. The remaining part of this Case is occupied by 
such specimens of the mineral species called aragonite as have partly 
been found to contain a few per cent, of carbonate of strontia : they 
are, however, essentially carbonates of lime, though of a different 
crystal system ;—the tarnowitzite is said to be a plumbiferous variety. 
Among the more interesting of the regular forms of aragonite here de¬ 
posited are the loose and variously grouped simple and hemitrope 
crystals from Aragon, and from Herrengrund, in Hungary, Kosel, 
Bohemia, &c., and the fine acicularly crystallized varieties, in brown 
iron-stone, from Ilefeld, in volcanic ejections of Vesuvius, &c.: they 
are continued in 
Case 42, in which are also placed several very perfect specimens of 
the coralloidal variety of aragonite from Eisenertz in Stiria, and 
Hiittenberg in Carinthia, formerly called fiosferri, &c. : to the massive 
varieties of this species some of the calcareous deposits of Carlsbad in 
Bohemia may be referred. The remainder of the Case contains 
several striking varieties of common carbonate of lime or calcite , 
some of which have been mistaken for aragonite. 
Cases 43 to 45 contain crystallized varieties of calcite or calcspar. 
Among the specimens placed in the first of these Table Cases maybe 
particularized those illustrative of double refraction, cleavage, supernu¬ 
merary j oints, colour, &c.; likewise the various secondary obtuse and acute 
rhombohedrons; among the former of winch the most common, but not the 
least striking, is the inverse variety of Haiiy, so called from its being as 
it were an inversion of the primitive rhombohedron of calcareous spar; 
and the same with a considerable admixture of quartz, commonly called 
crystallized sandstone of Fontainbleau, &c. ; also many interesting and 
beautiful specimens, from the Hartz, Derbyshire, &c., of prismatic and 
pyramidal modifications of the same substance. 
Case 45. Besides additional chiefly prismatic modifications of crys¬ 
tallized calcite, this Table Case contains several belonging to the sta- 
lactic and fibrous varieties of that substance, the most characteristic 
of which latter are those from Cumberland and Sweden, with pearly 
lustre (which has obtained for the former the appellation of satin-spar), 
and that in coloured layers from Africa. 
Cases 45 A and 45 B are set apart for polished specimens of such 
granular, compact, and fibrous varieties of calcite as are familiarly known 
by the appellation of marbles , and of those that bear the name of ala¬ 
baster in common with the finer varieties of sulphate of lime. Among 
the varieties of shell limestone in Table Case A., the most 
esteemed for ornamental purposes is the Carinthian lumachella, or fire 
marble. 
Case 46 contains the remaining varieties of calcite, among which 
may be specified the well-known depositions from the hot springs 
of Carlsbad in Bohemia, particularly the pisiform limestone, or 
pea-stone , as also the globular variety (considered by some as 
