LONG 
GALLERY. 
Nat. Hist. 
134 
stone , some varieties of which (such as those here de¬ 
posited from Egypt, Shir Amin in Persia, &c.) bear 
the name of alabaster in common with the finer varie¬ 
ties of gypsum, and have, by Werner and other mine¬ 
ralogists, been referred to fibrous limestone; the most 
beautiful modifications of which latter are those from 
Cumberland and Sweden, with pearly lustre (which 
has obtained for the former the appellation of satin- 
spar), and that in 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 well-known 
depositions from the hot springs of Carlsbad in Bo¬ 
hemia, particularly the pisiform limestone, or pea stone , 
as also the globular variety (considered by some as mag¬ 
nesian limestone) found in the bed of a small river 
near Tivoli, and known by the name of Confetti di 
Tivoli;—the tufaceous limestone, in porous, spongy, 
cellular, tubular and other imitative forms, as incrus¬ 
tation on various objects, such as on the human skull 
here deposited, which was found in the Tiber at Rome; 
calcareous deposition formed in a square pipe in a coal 
mine in Somersetshire ; casts made at the baths of San 
Felippe, where moulds of medals, gems, &c. are placed 
in suitable situations to receive the spray impregnated 
with calcareous particles.— Chalk .— Anthraconite or 
madreporite.—Marie , &c. 
Case 49. In this Case, besides some specimens of 
carbonate of magnesia, or magnesite , from Baudissero 
and from New Jersey, are placed those substances 
which, being chiefly composed of carbonate of lime and 
carbonate of magnesia, are called magnesian limestone , 
or dolomite, comprizing Werner’s rhomb-spar, dolo¬ 
mite 
