of Several Minerals. 125 



13. Another variety of the same, 7.537 



14. Lead-glance, hexahedrons obtained by cleavage, with striat- 

 ed surfaces, 7.535 



15. Lead-glance, in small granular composition, nearly compact, 



from the Prussian dominions on the Rhine, 7.557 



16. Lead-glance, hexahedrons bounded by feces of cleavage, from 

 Bleiberg, in Carinthia, 7.568 



17. Lead-glance of the same description, from Alston-moor, 7.570 



1 8. Lead-glance, from the Junghohebirke mine near Freiberg ; 

 massive, composition granular, individuals somewhat larger than 

 the preceding variety ; the difference in the specific gravity pro- 

 bably depending upon a small admixture of copper pyrites, 7.417 



19. Prismatic Tellurium-glance, laminae obtained by cleavage, 7.085 



20. Rhombohedral Moly den a- glance, cleavable, 4.591 

 "21. Grey Antimony, crystalline masses from the Wolffsberg mine, 



in the county of Stolberg, 4.620 



22. Jamesonite, from Cornwall, 5.564 



23. Jamesonite, from Zinobanya, in Hungary, 5.717 



24. Jamesonite, from Zinobanya, in Hungary, 5.798 



25. Tin-pyrites, 4.463 



26. Brittle Silver, a single crystal from Przibram, in Bohemia, 6.269 



Order XII. Blende. 



1. Hexahedral Glance-blende, a cleavable variety, 4.014 



2. Blende, a massive variety, with a radiated fracture, from Przi- 

 bram, in Bohemia, (the same which contains cadmium,) 4.027 



3. Blende, a dodecahedron of a brown colour, obtained by clea- 

 vage, 4.078 



4. Red Silver, the hollow six-sided prisms having the colour of 

 dark red silver, from the mine of Kurprinz, near Freiberg, 5.422 



5. Light Red Silver, cleavable masses, 5.524 



6. Dark Red Silver, a cleavable variety from the Hartz, 5.831 



7. Dark Red Silver, crystals from Beschert Gliick, near Frei- 

 berg, 5.846 



8. Hemi-prismatic Ruby-blende, a group of crystals, 5.234 



Several specimens of this rare species are at present in the 



Wernerian collection at Freiberg. They had lately been 

 found at the mine of Braunsdorf, where they occur in the 



drusy cavities of the silver veins, accompanied chiefly with 

 quartz. 



9. Cinnabar, from Neumarktl in Carniola, 8.098 



Order XIII. Sulphur. 



1. Realgar, a single crystal, 3.556 



