Temperature of Sublimation. 7 



oxidized and passes off as a gas. It may at these tempe- 

 ratures unite with the water present between the glasses and 

 condense on the latter as a very acid liquid. The presence 

 of sulphur is often revealed by faint whirling clouds, taking 

 various spiral forms of much regularity, and doubtless com- 

 posed of particles of condensed vapour. These whirling- 

 clouds are almost characteristic of this element. The earliest 

 appearance of sulphur being a mere dulling of the glass may 

 easily be mistaken for arsenic unless tests be applied as 

 described in the former paper (loc. cit. p. 866). 



The following Table contains a revision of the earlier data 

 and additional results : — 



Table III. 



t°. 



1. Molybdenite. MoS 2 . Loc? 450 



2. Pyrites. FeS.,. „ 450 



3. Marcasite. „ Jasper Co 440 



4. Hauerite. MnS. Kadusa 450 



5. Stannite. Cu 2 S, FeS 2 , SnS 2 . St. Agnes 460 



6. Chalcopyrite. Cu 2 S, Fe 2 S 3 . Loc.? 470 



7. Chalcosite. Cu 2 S. Cornwall 490 



8. Linnrcite. CoS, Co 2 S ;r Mussen 480 



9. Sphalerite (5). ZnS. Various 500-510 



10. Pentlandite. 2 FeS, NiS. Lillehammer 480 



11. Covellite. CuS. Butte 400 



12. Galenite. PbS. Loc? 470 



13. Bornite. Cu 2 S, CuS, FeS. Audley Mine, Cork ... 430 



14. Kilbrickenite." 6PbS, Sb 2 S 3 . Kilbricken 440 



15. Argentite. Ag 2 S. Joachimsthal 460 



16. Zinkenite. PbS, Sb 2 S 3 . Wolfsberg 400 



17. Nagyagite. Au 2 Sb 3 Pb l4 Te 7 S 17 . Nagyag 420 



18. Galenobismutite. PbS, Bi 2 S3. Nordmarken 470 



19. Alloclasite. Co(AsBi)S. Loc? 440 



20. Aikinite. 3 (PbCu 2 )S, Bi 2 S 3 „ 420 



21. „ ,, Beresowsk, Ural 410 



22. Emplectite. Cn 2 S, Bi 2 S 3 . Schneeberg 400 



23. „ ,, Schwarzenberg 470 



24. Bisnmthenite. Bi 2 S :i . Schneeberg 400 



25. Stibnite. Sb 2 S 3 . Iyo, Japan 380 



26&16. Zinkenite 130 



27&14. Kilbrickenite 185 



28. Sternbergite. Ag.,S, Fe 4 S,. Konigsberg 170 



29&4. Hauerite 70 



30&28. Sternbergite , 70 



31. Flowers of Sulphur 65 70 



