where the natives make hatchets, idols, &c. of it: 
it is generally considered as a variety of jade. 
Case 17. This case is occupied by the mica¬ 
ceous and talcose substances. Among the va¬ 
rieties of mica or glimmer, may be specified 
those that exhibit perfectly transparent crystals ; 
the beautiful red and yellow varieties, together 
with those of a metallic lustre : diverging-ra¬ 
diated mica, &c.—(micarelle of Kirwan). 
—LepidoUte ; with which is placed a specimen 
of what is considered as compact lepidolite.— 
Intermediate between mica and talc, is the chlo- 
rile, among the varieties of which are the earthy, 
common, foliated, and the slaty : the last of 
these, with octahedral magnetic iron-stone, bit- 
terspar, &c.—Of talc we have the common or 
Venetian (which enters the composition of cos¬ 
metics) and the indurated talc : to the former 
of these may also be referred the beautiful green 
variety from Siberia, composed of distinct groups 
of small diverging-radiated laminae.— Potstone, 
or ollite, the lapis comensis of the ancients, from 
Como in the Milanese, where it is turned on the 
lathe into most durable culinary vessels.—In 
this case is also placed a substance from New 
York, which has very much the appearance of 
white laminar talc, but is a hydrate of magnesia. 
Case 18 contains steatitic substances.— Noble 
serpentine, which, in combination with primitive 
limestone, constitutes the mar mo verde antico ; 
common serpentine, among the varieties of which 
are best known those from Bareuth and from 
Zoblitz 
SALOON 
Nat. Hist 
