J 80 
NATURAL HISTORY. 
[north 
which 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 the granular varieties; the compact, called 
barytic or ponderous marble, &c.; fetid barytes or hepatite , 
an intimate mixture of sulphate of baryta with bituminous 
matter; earthy barytes : also the rvolnyne from MuzSay 
in Hungary is a variety of sulphate of baryta. 
Case 57 contains the sulphates of lime, the principal 
varieties of which are,—-the selenite or sparry gypsum , in 
detached crystals and splendid groups, from Bex in Swiss- 
erland, Montmartre near Paris, Oxford, &c.; from St. 
Jago di Compostela, stained by red iron ochre; the fibrous 
gypsum with silky lustre, from Derbyshire, Swisserland, 
Montserrat; the granular gypsum or alabaster; the com¬ 
pact variety, to which belongs the stalagmitical gypsum 
from Guadaloupe ; the scaly gypsum (chaux sulfatee nivi- 
forme of Haiiy) from Montmartre; common earthy gyp¬ 
sum, &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 bardiglio and bar - 
diglione , as also the singular fibrous-compact variety, fami¬ 
liarly called tripe-stone (pierre des trippes), from the salt 
mines of Wieiiczka. 
Case 58. Sulphates continued:— sulphate of magnesia, 
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 co¬ 
balt-vitriol, as it is called, from Herrengrund in Hungary, 
which is only sulphate of magnesia, coloured red by oxide of 
cobalt.— Poly halite, a chemical compound of several sul¬ 
phates, formerly mistaken • f br anhydrous sulphate of lime : 
compact and fibrous, from the salt formation of Berchtes- 
gaden in Bavaria, and Ischei in Austria.— Sulphate of 
zinc, white or zinc vitriol. — Sulphate of iron, or green 
vitriol, (a salt mostly produced by the decomposition 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 Rammels- 
berg, in the Hartz, where it also occurs in the form of 
yellow scales, known by the name of misy ; and as concre- 
