124 Mr Haidinger's account of the Specific Gravity 



13. The fibrous White Cobalt of Werner, 6.968 



14. The same, reduced to a smaller size, and showing, therefore, 



that there are many small cavities in tlse mass, 7.064 



15. The fibrous White Cobalt of Werner, botryoidal shapes, ra- 

 ther pure, 7.280 



16. Hexahedral Cobalt-pyrites, crystallized in octahedrons, 6.29$ 



17. Hexahedral Iron-pyrites, hexahedral crystals, from Littmitz, 



in Bohemia, 4.981 



18. Hexahedral Iron-pyrites, the crystallized extremities of a 

 globular imitative shape, 5.001 



19. Hexahedral Iron-pyrites, admitting of a distinct cleavage in 



the direction of the planes of the hexahedron, from Freiberg, 5.010 



20. Hexahedral Iron-pyrites, from the heap of the Donat mine 

 near Freiberg. It is cleavable in the directions both of the hexahe* 

 dron and of the octahedron, the latter, however, is more easily ob^ 

 tained, 5.031 



21. Prismatic Iron-pyrites, a single crystal, from Schemnitz, in 

 Hungary, 4.678 



22. Prismatic Iron-pyrites, the crystallized extremities of a glo- 

 bular imitative shape, 4.787 



23. Prismatic Iron-pyrites, twin-crystals, from Littmitz, in Bo- 

 hemia, occurring with No. 17 on one specimen, 4.847 



24. Magnetic Pyrites, a cleavable variety, from Bodenmais, 4.631 



25. Copper Pyritts, massive, composition granular, 4.169 



26. Variegated Copper, 5.006 



27. Nickeliferous Grey Antimony, hexahedrons, bounded by 

 planes of cleavage, 6. 45 1 



Order XI. Glance* 



1. Fahlerz, massive, from the mine of Kurprinz, near Freiberg, 4.663 



2. Fahlerz, crystals, from Schwatz, in the Tyrol, 4.798 



3. Fahlerz, from Kapnik, 4.950 



4. Fahlerz, crystallized, from Kremnitz, in Hungary, 5.104 



5. Frismatoidal Copper-glance from St Gertraud, Carinthia, 5.739 



6. Bournonife, a massive variety, from Clausthal, in the Hartz, 5.705 



7. Bournonite, fragment of a large crystal, from Neudorf, in the 

 Hartz, 5.763 



8. Vitreous Copper, a compact variety, with conchoidal fracture, 



from the Bannat, 5.695 



9. Hexahedral Silver-glance, a single octahedral crystal, from the 

 mine Neue Morgenstern, near Freiberg, 7.223 



10. Lead-glance, a compound mass of individuals, elongated in 



one direction, and presenting a radiated fracture, 7.456 



11. Lead-glance, large cleavable individuals, Przibram in Bo- 

 hemia, 7.522 



12. Lead-glance, cleavable masses from the mine Junghohebirke, 7.526 



