14 
saloon, flammable fossil substance found by Humboldt 
Nat. hist, in South America, where it is called dapeclie , 
which has several of the properties of the common 
caoutchouc or India rubber; also the retinasphal - 
turn found at Bovey, and that from Wildshut and 
Bergen in Bavaria; the peculiar resinous sub¬ 
stance discovered in digging the tunnel at Kigh- 
gate, &c.— Amber , the yellow and white varie¬ 
ties : fragments inclosing insects.— Sulphur , crys¬ 
tallized 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 porcelain 
earth, &c. (See British Collection: Cumberland.) 
—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 x)r kohlenblende (to 
which may be referred the Kilkenny coal) is a 
specimen from Kongsberg in Norway, with na¬ 
tive silver. 
(Case 2.) The diamond , though combustible, is 
by common consent considered as the first of pre¬ 
cious stones : among the specimens selected to 
exemplify its crystalline forms, are the primitive 
regular octahedron ; the same with solid angles 
truncated; with edges truncated, forming the pas¬ 
sage into the rhomboidal dodecahedron; varieties 
of the latter, giving rise to the six-sided prismatic 
and the tetrahedral forms ; cubes with truncated 
and 
