13 
of strontian, &c.; the same found sublimed saloon. 
near the craters of volcanoes. Graphite, com- Nat. Hist. 
monly called black lead, massive, disseminated 
in porcelain earth, &c.—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 (to which may be referred the 
Kilkenny coal), is a specimen from Kongsberg in 
Norway, with native silver. 
(Case 2.) The diamond, though combustible, 
is by common consent considered as the first of 
precious stones: among the specimens selected 
to exemplify its crystalline forms, are the primi¬ 
tive regular Octohedron ; the same with solid 
angles truncated ; with edges truncated, forming 
the passage into the regular dodecahedron ; varie¬ 
ties of the latter giving rise to the six-sided pris¬ 
matic and the tetrahedral forms ; cubes with trun¬ 
cated and bevilled edges ; various hemitropic crys¬ 
tals or macles of diamonds, &c. With these 
are also placed specimens of the alluvial rocks in 
which the diamonds occur in the East-Indies and 
in Brazil.—Zircon : to which belong, the common 
jargon of various colours, and the orange coloured, 
considered by some as the true hyacinth ; also the 
variety called zirconite from Friedrichsvarn in 
Norway, imbedded in syenite, a rock composed 
of feldspar, and hornblende.—Corundum : under 
which 
