76 
natural history. (Minerals.) 
[north 
which are with difficulty distinguishable from rhomb-spar and from iron- 
spar- several interesting specimens for figure, colour and lustre, chiefly 
ftom’ Schemnitz and Kremnitz in Hungary, are deposited m this case. 
Carbonate of iron, or iron-spar, crystallized, fibrous, massive, and o- 
tryoidal ( spharosiderite 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, is c. 
Case 49 One half of this glass Case is occupied by the several 
varieties of carbonate of zinc, or zinh-spar, (aiso called 
common with the silicate of zinc or smithsomte m Case ~6,) crystallized, 
botryoidal, and in other forms, among which are the pseudomorphous 
crystals derived from modifications of carbonate of lime. — 1 he other 
h?lf contains the carbonates of lead, lead-spar, or ^teUadore^g 
which are the delicately acicular varieties from the rfartz, arn trom 
Cornwall, accompanied and partly coloured by green carbonate of cop- 
per ; the crystallized varieties from Siberia, Mies in Bohemia, & . , 
the Case V 30. len 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 combLed 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- 
' > ° (>se 5lt The green carbonates of copper, among which may be 
specified the fine and rare varieties of fibrous malachite, in acicular crystals, 
and ma«sive with fibrous structure and velvety appearance, accompam 
hv carbonate of lead, &c. ; and, among the specimens of compact mala - 
elite those characteristic and splendid ones from the Gumashevsk an 
Turi’a 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 
R< cSe 5‘2. Besides the nitrates, (such as the nitrate ofpotassa, na- 
tive nitre or saltpetre, found as efflorescence, mixed with other salts, 
and as crystalline crusts, from Pulo di Molfetta in Apulia, from near 
Bureos in Spain, &c. ; nitrate of soda, frc. ;) 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 ,— 
alauberite, a mineral composed of the anhydrous sulphates of soda and 
limp from the salt mines of Villarubia and Aranjuez m Spam, em- 
bedded' insMt andclay. The rest of this, with half of the next case 
otu ded by sulphates of baryta and baroselenite, denominated 
XohZy-spal^Lg which maybe specified the splendid groups 
, f ,traiAt-lamellar crystallized heavy-spar, especially those from 
Schemnftz in Hungary; and Clausthal in the Hartz, Traversel a in 
Piedmont the large very perfect crystals from Dufton, Cumberland, 
&c the curved-lamella varieties; the columnar, resembling car- 
bonate of lead ; the radiated, to which belongs the Bolognese spar, 
from Monte Pa terno, near Bologna, from Bavaria, &c. ; the beautiful 
