436 ; Transactions.— Geology. 
1. Loose stones at Mahurangi, which are composed of silicate of mag- 
nesia, and in which Nickel occurs in small and variable amounts. 
2. Portions of a large rock mass of serpentine, which is found cropping 
out in the direction of Hoteo, fps Mahurangi, were found to contain °49 
per cent. Nickel. 
8. Serpentine from small streams near Manukau North Head, contained 
‘47 per cent. Nickel. 
4. Calcite from Matakohe, stained with hydrated silicate of Nickel. 
5. Hard greenstone from Papakura Valley, gave a trace of Copper and 
26 per cent. Nickel. 
6. Green unctuous clay from Waipu, gave -11 per cent. Nickel. 
7. Foliated serpentine from Coromandel, also gave a trace of Nickel. 
During the past year I visited the locality from which No. 2 of Mr. 
Pond’s specimens was obtained and collected specimens of a green siliceous 
rock which occurs in considerable mass on the Port Albert Road from 
Mahurangi. This rock Mr. Skey reports contains the oxide of nickel at 
the rate of 1-81 per cent., and appears to be in the form of a silicate. As 
it occurs as an isolated outcrop, it is impossible to say what its relations are, 
but seeing that it is free from sulphur and would thus obviate the necessity 
of roasting before treating in the ordinary way, a small percentage would 
no doubt pay for extraction, and it appears probable that richer — 
will yet be found in the district. 
Tron. 
This metal is largely represented in New Zealand, where it occurs 
in most of the known and more valuable forms both as oxides, sulphides, 
carbonates, and silicates, besides some interesting samples of phosphate 
and sulphate and the titaniferous iron ores. 
Magnetite, Fe Ee—This mineral, which consists of a mixture of the 
ferrous and ferric oxides, does not occur in a massive form in New Zealand, 
so far as is at present known, but is disseminated through various rocks 
in minute octahedral erystals. and grains. It is principally developed 
the chlorite schists on the western side of the main range in the South 
Island, where in the neighbourhood of Mount Cook, large quantities are 
found disseminated through the bed rock in the form of minute — 
which at places become so plentiful as to form beds, interstratified with 
the schists, from 6 inches to 8 inches in thickness. Similar deposits ar° 
found at Lake Harris, in the Wakatipu district, where the Magnetite 
occurs in small veins and octahedral erystele: dispersed through the rock, 
associated with thin bands of Hematit s of specular 
Se, een, Conner oe of New 
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