PLATE XII. 
Figs. 1—3.—Sulphur. 
1. Native Sulphur , rhombic octahedron, primary form, with truncation of the vertex and of the upper basal edges, from 
Girgenti in Sicily. 
2. The same, with truncation of the two acute vertical edges, from the same locality. 
3. The same, a rhombic octahedron with truncation of all the vertical and basal edges, of the acute basal edges, of the 
acute lateral angles, and triple truncation of the upper basal edges ; combination of five different rhombic octahedrons with the 
half prism, from the same locality. 
Fig. 4.—Honey-Stone. 
4. Honey-Stone or Mellite, mellate of alumina with fifteen equivalents of water; primary form, a quadratic octahedron, 
from the brown coal at Arten in Thuringia. 
Figs. 5—7.—Graphite. 
5. Graphite plumbago , primary form, lower hexagonal prism or table, from the magnetic iron-stone disseminated in the 
gneiss of Arendal in Norway. 
6. Clear yellow transparent Amber , roundish mass of a remarkable resinous lustre and conchoidal fracture, enclosing 
several flies, from the coast of the Baltic, near Dantzic. 
7. Brown red Amber, in the tertiary sandstone of Carpathia. 
Figs. 8—10.—Coal. 
8. Anthracite , from the greywacke of Portsmouth, Ehode Island. 
9. Parrot or Cannel Coal, compact, with rhombic segregation, of rare occurrence, in layers, from the lower coal-beds of 
Saar brack. 
10. Pitch-glancing Coarse Slate Coal , from the coal formation of Planitz in Saxony, known as pitch-coal. 
Figs. 11—13.—Frown-Coal, Lignite. 
11. Acicidar Brown-Coal , bundles of vessels of the stems of palms, from the tertiary sand of Lobsann in Elsass. 
12. Earthy Brown-Coal, with fossil seeds, from Salzhausen, the smaller oblong granules are the Carpolithus minutulus of 
Brown, the larger ones are nuts of the Jugulans rostratci, half converted into coal and partly opened. 
13. Bituminous Wood, Lignite, or fibrous wood-coal, from the tertiary coal mines of Skoplau, at Colditz in Saxony. 
