32 
saloon. (Case 20 .) Prismatic and pyramidal modifies- 
NatThist. tions of the same, among the former of which 
are the beautiful prismatic and dodecahedral va> 
rieties (Mod. 2 , with 3 and 4 of Bourn.i from 
the Hartz; among the latter, the voluminous 
crystals of the metastatic variety (Mod. 36), &c. 
(Case 21.) The same continued : also hemitro- 
pic or macled crystals, among which is the beau¬ 
tiful heart shaped made of the variety called, by 
Haiiy, analogique distante. (Mod. 2, 4, and 36.) 
—This case also contains granular and compact 
limestone (marbles); massive magnesian lime¬ 
stone, called dolomite, and (contiguous to it, in 
the opposite case) the crystallized magnesian 
limestone, called bitterspar, in chlorite slate, 
&c.—Fibrous limestone, the finest variety of 
which is that from Cumberland, and Andrarum 
in Sweden, with pearly lustre, which has ob¬ 
tained the name of satin spar. 
(Case 22.) Various specimens of stalactical 
limestone, some varieties of which bear the name 
of alabaster in common with compact gypsum ; 
the peculiar variety called pea stone, from the 
hot springs of Carlsbad in Bohemia, and the 
white variety found in the bed of a small river 
near Tivoli, and known by the name of confetti 
di Tivoli .—Calcareous tufo ; to which are added 
some casts of medals, made at the baths of 
San- 
