490 Transactions.— Geology. 
Art. LXXVII.—Notes on some of the New Zealand Minerals belonging to 
the Otago Museum, Dunedin.* By A. LrvERsIDGE, Professor in the 
University of Sydney ; communicated by Professor Hutton. 
[Read before the Otago Institute, 23rd October, 1877.] 
Graphite.] —Nelson. 
Compact, with lamellar and petaloidal structure; requires purification 
to render it of commercial value. 
Fews Creek ; Wakatipu. 
Lamellar structure, impure, much contaminated with sesquioxide of 
iron, which is probably derived from the decomposition of iron pyrites. 
Graphite, 
Graphite. —Dunstan, Otago. 
Rather loose and friable; impure. A sample from Clyde, Dunstan, was 
analyzed by Mr. Skey, and gave the following results :— 
Water rie ee «s bs 
ae 3:5 
Earthy matter is ot ee E e BP 
Carbon s = «x Fe ae Mri 
100-0 (Skey). 
Retinite.$ —Dunstan. 
In massive more or less rounded lumps; colour, shades of brown, ochre, 
and grey, which are often mingled in irregular wavy streaks; the external 
surface is somewhat rough and pitted; breaks with a well-marked large 
conchoidal fracture; brittle; burns readily, with a smoky luminous flame, 
evolving a somewhat aromatic odour ; heated in a closed tube, fuses, gives 
off white fumes and furnishes a yellow distillate ; blackens on the continued 
application of heat. 
Analysis. 
ar ; i an re = -. 75-979 
Hydrogen ii = d S 5 REIS 
Oxygen is em zs và -» 19:306 
Am .. Ex e n :203 
100-000 (Liversidge). 
* Às in many instances these mineral specimens or other specimens from the same 
localities have already been determined and reported on by the Geological Survey Depart- 
ment of New Zealand, the previous reports are cited for convenience of reference. —Ep. 
f For analysis see Reports N.Z. Exh., 1865, p. 417. 
ł Rep. Col. Mus. and Lab., 1870, p. 14. $ Rep. N.Z. Exh., 1868, p. 438. 
