"gallery.] natural HISTORY. 179 
mica (from Vesuvius, Siberia, and Monroe, in New York), 
which has but one axis; -and the lit hia-mica, which, be¬ 
sides the beautiful peach-blossom, red, violet, greenish- 
grey, and white scaly varieties known by the name of lepi - 
dolite , from Bozna in Moravia, likewise comprises several 
large-foliated varieties of what was formerly considered as 
common mica, such as that from Zinnwald in Bohemia and 
Altenberg, accompanied by apatite, tin-stone, and topaz. 
—The species and varieties of the talcose substances are 
likewise very imperfectly understood. Among the speci¬ 
mens of talc in this glass Case may be specified the com¬ 
mon or Venetian (which enters into the composition of cos¬ 
metics), and the indurated talc; to the former of which 
may be referred the green radiated variety from Siberia, 
composed of distinct groups of small diverging laminae, 
and to which the name of pyrophyllite is commonly given; 
— agahnatolite , (Werner’s bildstein, Haiiy’s talc gla- 
phique), employed by the Chinese for carving images, 
vessels, &c.;— chlorite , crystallized in aggregated, small, 
modified rhombic prisms; the earthy and foliated varieties, 
coating crystals of octahedral magnetic iron-stone, &c.;— 
pinite , crystallized in regular hexagonal prisms, and gie- 
s eclat e, from Greenland, which appears to be a variety of 
this species.— Fahlunite , under which name several dis¬ 
tinct substances have been noticed by authors. 
Case 33. This and part of the following Case chiefiv 
contain substances related to hornblende or amphibolic 
minerals, among which may be specified the basaltic and 
common hornblende , including the pargasite ;—the actino - 
lite or strahlstein (divided by Werner into the glassy, 
common, and fibrous varieties) ;—the grammatite or tremo - 
lite (so called from Val Tremola, where, however, it is 
not found), among the specimens of which are the fine, 
fibrous varieties, resembling asbest; the glassy tremolite, 
in dolomite and granular limestone, &c.— Arfvedsoniic — 
Anthophyllite . 
Case 34. Part of this Case is filled with the mineral 
substances called asbestine, many of which appear to pass 
into some of the varieties of amphibole in the preceding 
glass Case. Among these may be observed specimens illus¬ 
trative of the transition from a very close to a loose-fibrous 
