504 Transactions.—G eology. 
Metallic iron. 
When chemically pure, Brown Hematite contains .. 99:89 
= i » eed. $5 $i 2 ME 
» ss »  Magnetite ,, S a AN 
Brown Hematite.—Lansdowne, Port Molyneux. 
Exhibiting a concretionary and cavernous structure. Labelled 65 per 
cent. of iron. 
Siderite.*—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. R. Hempseed. 
Chromite.—Moke Creek, Queenstown. 
Of rich quality; granular in structure; incrusted in part with chrome 
ochre. 
Chromite.—Dun Mountain. 
Of rich quality; granular structure; attached on one side is a little 
serpentine. 
Chromite,] —Milford Sound. 
Rich quality; a rolled nodule; granular structure; associated with a 
little steatite. 
Iron Pyrites.—Shotover. 
In well-developed eubes, 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 (Ag, S) coating of sulphide. 
N.B.—(Should have followed native platinum.) 
Presented by Dr. Alexander. 
MISCELLANEOUS, 
Quartzite in Basalt.—Near Mount Livingstone. 
An angular fragment of quartzite, embedded in a porphyritie basalt. 
To determine whether the enclosed fragment consisted of pure silica, 
the following estimates were made :— 
Silica .. F em ae "s s 85:030 
Sesquioxides of iron and alumina a e 2.05 4078 
| * Bep. N.Z. Exh., p. 436. t Rep. N.Z. Exh., p. 410. 
