123 
ferri , &c. To the massive varieties some of the calca¬ 
reous deposits of Carlsbad in Bohemia may be referred. 
Cases 43,44, and 45 contain the crystallized varieties 
of Carbonate of lime or calcareous spar. Among the 
specimens in Case 43 may be specified those illustra¬ 
tive of the double refraction, cleavage, supernumerary 
joints, colour, &c., as also of the various secondary 
obtuse and acute rhombohedrons, among the former of 
which the most common, but not the least striking, is 
the inverse variety of Haiiy, so called from its being as 
it were an inversion of the primitive rhombohedron of 
calcareous spar; and the same with a considerable ad¬ 
mixture of quartz, commonly called crystallized sand¬ 
stone of Fontainebleau, &c. In the two next cases are 
deposited many interesting and beautiful specimens 
from the Hartz, Derbyshire, &c., of prismatic and py¬ 
ramidal modifications of the same substance. 
Case 46 contains various specimens of stalactic lime¬ 
stone, some varieties of which bear the name of Ala¬ 
baster in common with the finer varieties of gypsum, 
and have, by Werner and other mineralogists, been re¬ 
ferred to fibrous limestone , the most beautiful modifi¬ 
cations of which are those from Cumberland and 
Sweden, with pearly lustre (which has obtained for 
the former the appellation of satin-spar), and that with 
coloured layers from Africa. Also some specimens of 
granular limestone (granular marble) are placed in this 
Case. 
Case 47 is set apart for such compact varieties of 
limestone as are generally called Marbles; for the 
present it only contains some varieties of shell limestone , 
the most esteemed of which, for ornamental purposes, 
is that from Carinthia, called lumachella or fire marble. 
Case 48 contains the remaining varieties of Carbonate 
of lime, among which may be specified the w ell-known 
depositions from the hot springs of Carlsbad in Bo¬ 
hemia, particularly the pisiform limestone, or pea stone , 
as also the white variety (considered by some as mag¬ 
nesian limestone) found in the bed of a small river 
LONG 
GALLERY. 
Nat. Hist. 
near 
