NATURAL HISTORY. 
65 
GALLERY.] 
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, 
Montserrat; the granular gypsum 6r alabaster the compact variety, to 
which belongs the stalagmitical gypsum from Guadaloupe; the scaly 
gypsum (chaux sulphatee niviforme of Haiiy) from Montmartre; com¬ 
mon earthy gypsum, &c.— Anhydrous sulphate of lime, or anhydrite, 
(also called cube-spar and muriacite,) crystalline, fibrous, granular and 
compact; to the last of which belong some of the Italian varieties 
known by the name of hardiglio and bardiglione, as also the singular 
fibrous-compact variety, familiarly called tripe-stone (pierre des trippes), 
from the salt mines of Wieliczka. 
Case 55. Sulphates continued ;— sxdphate of magnesia, or epsomite, 
generally occurring in crystalline fibres : the fine variety from Calatayud 
in Arragon ; also the haar salz (capillary salt) of Idria belongs to this 
species, and the stalactic cobalt-vitriol, as it is called, from Herrengrund 
in Hungary, which is only sulphate of magnesia, coloured red by oxide 
of cobalt.— Polyhalite, a chemical compound of several sulphates, 
formerly mistaken for anhydrous sulphate of lime: compact and fibrous, 
from the salt formation of Berchtesgaden in Bavaria, and Ischel in 
Austria.— Sulphate of zinc, white vitriol or gallitzinite _ Sulphate of 
iron, green vitriol, or melantherite, (a salt mostly produced by the de¬ 
composition of iron pyrites,) in beautiful large rhombohedral crystals, 
from Bodenmais in Bavaria, and massive, and in stalactic-fibrous forms, 
such as the specimens from the Rammelsberg, in the Hartz, where it 
also occurs in the form of yellow scales, known by the name of misy ; 
and as concretions of a red colour, called vitriol-roth or bctryogene : 
the plumose vitriol (federsalz), and a botryoidal-reniform substance 
called bergbutter, are nothing but casual mixtures of sulphate of iron and 
hydrous sulphate of alumina.— Sulphate of copper, or copper vitriol: — 
the finest sky-blue specimens here deposited, together with the stalactic, 
fibrous and crystallized varieties, (the large group of crystals is artificially 
prepared,) are from Herrengrund in Hungary. There are also two or 
three scarce Siberian mineral substances placed in this Case (one of 
them, the brochantite), Vv^hich appear to be sub-sulphates of copper, but 
which stand in need of more accurate chemical examination_ Sulphate 
of uranium oxide or johannite, a very rare mineral substance, from Joa- 
chimsthal, Bohemia— Sulphate of lead, lead-vitriol, or anglesite, of 
which we have a suite of specimens with brilliant and well defined 
crystals from Badenweiler in Suabia, from the Parys mine in An- 
glesea, &c.; the sulphato-carbonate (lanarkite), and sulpliato-tricar- 
honate {suzannite'), the cupreous sulphato-carbonate {caledonite) of 
lead, &c., from Leadhills, &c. — Sulphates of alumina: —common 
alum, crystallized, fibrous, &c., from various places ; and the hj^drous 
sub-sulphate of alumina, called aluminite, or websterite, from Sussex 
and from Halle in the territory of Magdeburg, which was by some 
mistaken for pure alumina, and by others for hydrate of alumina with 
mechanically admixed sulphate of lime : it must not be confounded 
with another substance, also called aluminite or alum-stone, (alunite of 
some mineralogists,) from Tolfa, &c., which is a basic sulphate of alu¬ 
mina and potassa. 
In this Case are also placed some specimens of lazulite, or lapis 
