Cox.—On the Mineralogy of New Z ealand. 979 
Besides which there are numerous small seams, 10 inches thick and less, 
occurring in the jurassie strata in various localities, as the Hokanui Hills 
and Mataura, Southland ; Waikawa, Otago; and the Waikato Heads, Auck- 
land ; in faet wherever the formation occurs, but since they have never been 
found in seams which are of sufficient thickness to work remuneratively 
they do not merit any special attention. 
Bituminous Coals——These coals are, so far as is at present known, 
exclusively confined to the west coast of the South Island. At Collingwood 
they occur as thin seams from 27 inches to 32 inches in thickness; one 
mine being at present at work in this district. The average composition of 
the coal from this locality is— 
Fixed carbon 53:29 
Hydro-carbon 38:18 
Water .. 2:06 
6:47 
100-00 
At Westport seams of bituminous coal occur from 4 feet to 50 feet in 
thickness, and two mines are at present at work. The estimated quantity of 
coal in this field, from accurate surveys, is 140,000,000 tons, which is pro- 
bably considerably below the mark. All the coal is level, free, and generally 
at an elevation of from 1,000 to 3,000 feet above the sea. The average 
- composition of the éoal is— 
Fixed earbon .. yt vg v c DE ME 
arbon.. A. "i: oe. BESS 
Water .. f: s iy sd 3°08 
ABD us kie 2s zu m 1:28 
100-00 
There are also two small areas of highly-inclined, faulted coal, which is 
much crushed, and too tender to be marketable. It has the following com- 
position :— 
Fixed carbon .. a P <a ^ i 05 
Hydro-carbon ri zz ... i e 
Water .. ss x e n 1:40 
Ash - = D Pi 2°26 
Two mines have been opened to work this coal, but both are now 
abandoned, 
At Greymouth another series of bituminous coals has been worked in 
which the percentage of fixed carbon is considerably less than in that from 
Westport. It is, however, an exceedingly valuable gas coal, and the coke 
made from it is as good as can be procured. The seams vary in thickness 
