13 
raiigement of this collection, a natural order 
founded on external characters has been follow¬ 
ed : not, however, without consulting the che¬ 
mical composition of the substances, so far as 
convenience would admit. Each of the glazed 
table-cases has its number inscribed on the upper 
part of the middle square of glass. 
Case 1 contains the combustible substances, 
among which may be particularized the different 
varieties of bitumen^ from the fluid naphtha^ to the 
solid (pitch coal of Werner) and the mineral 
caoutchouc from Derbyshire. (See British Collec¬ 
tion : Derbyshire.) With these is placed an in¬ 
flammable fossil substance found by Humboldt 
in South America, where it is called dapeclie, 
which has several of the properties of the com¬ 
mon caoutchouc or India rubber; also the retin- 
asphaltuni found at Bovey, and that from Wilds- 
hut and Bergen in Bavaria; the peculiar resinous 
substance discovered in digging the tunnel at 
Highgate, See.— Amber ^ the yellow and white 
^ varieties : fragments inclosing insects.— Sulphur ^ 
j crystallized and massive, with selenite, sulphate 
I of strontian, &c.; the same found sublimed near 
1 the craters of volcanos.— Graphite^ commonly 
i called black lead, massive, disseminated in porce- 
1 lain earth, &c. (See British Collection : Cum- 
I berland.)^—A few specimens of black coal .— 
Brown coal, to which belongs the well known 
Bovey coal. — Dysodile^ or papyraceous brown 
coal. Among the specimens of anthracite or 
kohlenblende 
SALOON. 
Nat. Hist 
