54 
ROOM VIII. 
CASE 3. 
CASES 
4 to 9 
CASE 
10 . 
CASE 
11 
Lavas and other voleanic productions, in large 
polished pieces. 
Miscellaneous specimens of minerals of con¬ 
siderable dimensions, with their names affixed. 
A collection of Derbyshire minerals, formed by 
Mr. White Watson, partly arranged according 
to the succession of strata in which they are found. 
{Shelf l.) Peat; argillaceous grit ; clay, &c. 
{Shelf 2 .) Argillaceous ironstones, and ferru¬ 
ginous clays, with and without petrifactions. 
{Shelf 3.) Nodules of argillaceous ironstone : 
septaria : several varieties of coal. 
{Shelf 4.) Varieties of sandstone ; breccias; 
granite; slate ; rottenstone, &c. 
{Shelves 5-6.) Several varieties of limestone, 
most of them with petrifactions, such as en- 
trochi, cockles, &c.; several varieties of horn- 
stone or chert. 
{Shelf 1 .) Various vein materials: combina¬ 
tions of galena, limestone, barytes, blende, fluor 
spar, &c.; breccias of limestone, hornstone, 
&c. 
{Shelf 2 .) Vein materials: various limestones 
with rake and flat veins composed of galena, 
blende, fluor spar, barytes. See .; slickensides of 
galena and of fluor. 
{Shelf 3.) Bitumens of various consistence, 
separate 
