140 
LONG 
GALLERY. 
Nat. Hist. 
detached crystals and splendid groups from Bex in 
Swisserland, Montmartre near Paris, Oxford, See. ; from 
St. Jago di Compostela, stained by red iron ochre; 
the fibrous gypsum with silky lustre, from Derbyshire, 
Swisserland, Monserrat; the granular gypsum or ala¬ 
baster ; the compact variety, to which belongs the sta- 
lagmitical gypsum from Guadaloupe; the scaly gypsum 
(chaux sulfatee niviforme of Haiiy) from Montmartre; 
common earthy gypsum, &c.—• Anhydrous sulphate of 
lime , also called anhydrite , cube-spar and muriacite, crys¬ 
talline-fibrous, granular, and compact; to the last of which 
belong some of the Italian varieties known by the name 
of bardiglio and bardiglione , as also the singular fibrous- 
compact variety familiarly called tripe-stone (pierre des 
trippes), from the salt mines of Wieliczka. 
Case 58. Sulphates continued :— sulphate of magnesia, 
generally occurring in crystalline fibres: the fine va¬ 
riety from Calatayud in Arragon ; also the haar-saltz 
(capillary salt) of Idria belongs to this species, and the 
stalactic cobalt-vitriol, as it is called, from Herrengrund 
in Hungary, 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 , volute or zinc vitriol. — Sid- 
phate of iron, or green vitriol (a salt mostly produced by 
the decomposition of iron pyrites) in beautiful large 
rhomboidal 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 vitriolroth or botryogene: 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 
cobalt. — Sulphate of copper or blue vitriol:— the finest 
sky-blue specimens here deposited, together with the 
stalactic, 
