180 
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, &cfetid barytes or hepatite, 
an intimate mixture of sulphate of baryta with bituminous 
matter; earthy barytes : also the wolnyne 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 Wieliczka. 
Case 58. Sulphates continued:— sulphate of magnesia, 
generally occurring in crystalline fibres : the fine variety 
from Calatayud in Arragon; also the haar-sah (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 for 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- 
