504 Transactions. — Geology. 



Metallic iron. 

 When chemically pure, Brown Hematite contains ... 59*39 



„ Eed „ ,, ... 70-03 



,, ,, ,, Magnetite „ „ ... 72*40 



Brown Hematite. — Lansdowne, Port Molynenx. 



Exhibiting a concretionary and cavernous structure. Labelled 65 per 



cent, of iron. 



Siclerite. * — Dunedin . 



Groups of small brown-coloured rhombohedral crystals of the carbonate 



of iron ; the rhombohedra are piled up into little columns. Lining cavity 



in basalt. 



Magnesian Ironstone. — Clutha. 



A rolled nodule. Hardness about 6 ; tough ; somewhat splintery 



fracture. Contains some manganese. Effervesces slightly with boiling 



hydrochloric acid. 



Dendritic Iron Markings. — North-East Valley. 

 Presented by Mr. E. Hempseed. 



Ckromite. — Moke Creek, Queenstown. 



Of rich quality ; granular in structure ; incrusted in part with chrome 



ochre. 



Ckromite. — Dun Mountain. 



Of rich quality ; granular structure ; attached on one side is a little 



serpentine. 



Chromite. f — Milford Sound. 



Eich quality ; a rolled nodule ; granular structure ; associated with a 



little steatite. 



Iron Pyrites. — Sliotover. 



In well-developed cubes, embedded in chlorite schist. 



Iron Pyrites. — Maori Point, Wakatipu. 



In large cubes embedded in a similar chlorite schist to the above. 



Native silver. — Kawaru. 

 Small specimen ; tarnished with (Ag2 S) coating of sulphide. 

 N.B. — (Should have followed native platuaum.) 

 Presented by Dr. Alexander. 



Miscellaneous. 

 Quartzite in Basalt. — Near Mount Livingstone. 

 An angular fragment of quartzite, embedded in a porphyritic basalt. 

 To determine whether the enclosed fragment consisted of pure silica, 

 the following estimates were made : — 



Silica .. .. .. .. .. .. .. 85-030 



Sesquioxides of iron and alumina . . . . . . 4'878 



* Eep. N.Z. Exh., p. 436. f Eep. N.Z. Exh., p. 410. 



