( 13 ) 
{Shelf 4.) Varieties of sandstone; breccias; 
granite; shales ; rottenstone, &c. 
(<Shelves 5-6.) Several varieties of limestone, 
most of them with petrifactions, such as entro- 
chi, cockles, &c. ; several varieties of hornstone 
or chert. 
[Shelf 1.) Various combinations of galena, 
limestone, barytes, blende, fluor spar, &c.; 
breccias of limestone, hornstone, &c. 
[Shelf 2.) Various limestones with rake and 
flat veins composed of galena, blende, fluor 
barytes, &c.; slickensides of galena and of fluor. 
{Shelf 3.) Bitumens of various consistence, 
separate and on limestones, on fluor spar, &c.; elas¬ 
tic 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 varie¬ 
ties 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 burr, used for hand-mills: tophus, &c. 
{Shelf 6.) Hornstone, or chert of various 
kinds, separate and combined with limestone. 
[Shelf 1.) A collection of stalactites and wa- 
tricles 
ROOM VIII. 
Nat. Hist 
CASE 
2 . 
