24 
ROOM VIII. 
Nat. Hist. 
CASE 
12 . 
(Shelf 2.) Vein materials; various lime¬ 
stones with rake and fiat veins composed of 
galena, blende, fluor spar, barytes, &c.; slick- 
ensides of galena and of fluor. 
(Shelf 3) Bitumens of various consistence, 
separate and on limestone, on fluor spar, &c.; 
elastic bitumens of several degrees of softness. 
(Shelf 4) Marbles of various colours, with 
their natural fracture, and polished: white and 
variegated alabaster; efflorescent and other va- 
o 
rieties of selenite on limestone- &c.; white and 
coloured clays and porcelain earths. 
. (Shelf 5 ) Several varieties of compact lime¬ 
stone: shell and coralline marbles, polished and 
unpolished; porous limestone with siliceous shells, 
called bur, used for hand-mills: tophus, &c. 
(Shelf 6) Hornstone, or chert of various 
kinds, separate and combined with limestone. 
(Shelf l.) A collection of stalactites and 
watricles formed in limestone caverns, some cut 
and polished; calcareous incrustations, kc. 
(Shelves 2-3.) Calcareous spar in various 
forms of crystallization. 
(Shelf 4) Several varieties of amethystine 
fluor spar; most of the pieces cut and polished. 
(Shelf 5.) Topazine and other varieties of 
fluor spar, with barytes, blende, iron pyrites, 
kc.y mostly cut and polished. 
(Shelf 
