64 
NATURAL HISTORY. 
[north 
— Carbonate of iron, or iron-spar, crystallized, fibrous, massive, and bo- 
tryoidal (spliceroskierite of Hausmann )—Carbonate of manganese, or 
manganese spar, crystallized and in globular and botryoidal shapes of 
various shades of rose colour, on sulphuret of manganese, &c. 
Case 49. One half of this glass Case is occupied by the several 
varieties of carbonate of zinc , or zink-spar, (also called calamine, in 
common with the silicate of zinc or smithsonite in Case *26,) crystallized, 
botryoidal, and in other forms, among which are the pseudomorphous 
crystals, derived from modifications of carbonate of lime.—The other 
half contains the carbonates of lead, lead-spar, or white lead ore, among 
which are the delicately acicular varieties from the Hartz, and from 
Cornwall, accompanied and partly coloured by green carbonate of cop¬ 
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 coppei', or copper-azure, the more re¬ 
markable varieties of which are those from Cnessy, and from the Ban- 
nat, combined with various substances ;—the earthy varieties, some of 
w'hich 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, hafe, by Hally, 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 ;—carbonate of cerium, also 
called carbocerite, as coating on cerite, from Bastnas, Sweden; — car¬ 
bonate of bismuth, (bismuthite of Brithaupts,) from the principality of 
Reuss. 
Case 5*2. 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, &e. ; nitrate of soda , fyc .;) 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 w hich may be specified the splendid groups 
of straight-lamellar crystallized heavy-spar, especially those from 
Schemnitz in Hungary, and Clausthal in the Hartz, Traversella in 
Piedmont, the large very perfect crystals from Dufiton, Cumberland, 
&c.; the curved-lamella varieties; the columnar, resembling car¬ 
bonate of lead; the radiated, to wdiich 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 tne granular varieties; the compact, called barytic or ponderous 
marble, &c. ; fetid baroselenite or hepatite , an intimate mixture of sul- 
