13 
rangement 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 o £ bitumen^ from the fluid naphtha, to the 
solid jet (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 dapeche, 
which has several of the properties of the com¬ 
mon caoutchouc or India rubber; also the retin - 
asphaltum found at Bovey, and that from Wild- 
shut and Bergen in Bavaria; the peculiar resinous 
substance discovered in digging the tunnel at 
Highgate, &c.— Amber , the yellow and white 
varieties: fragments inclosing insects.— Sulphur , 
crystallized and massive, with selenite, sulphate 
of strontian, &c.; the same found sublimed near 
the craters of volcanos.— Graphite , commonly 
called black lead, massive, disseminated in porce¬ 
lain earth, &c. (See British Collection: Cum¬ 
berland.)—A few specimens of black coal — 
Brown coal , to which belongs the well known 
Bovey coal .— Bysodile , or papyraceous brown 
coal. Among the specimens of anthracite or 
kohlenblende 
SALOON 
Nat. Hist 
