Cox. — On the Mineralogy of New Zealand. 369 



The average of thirteen analyses of the true brown coals from this district 

 give 



Fixed carbon 42-87 



Hydro-carbon.. .. .. .. 31-89 



Water 20-40 



Ash 4-84 



100-00 



as their composition, the fixed carbon varying from 49 to 38 per cent., and 

 the water from 18 to 24 per cent. The coal from the different mines does 

 not vary a great deal in character, for good and inferior samples can be 

 obtained from each. 



Besides that at the Malvern Hills, there are two seams of brown coal, 

 each 10 feet thick, at the Eakaia Gorge, of which the average composition 

 is — 



Fixed carbon 45-76 



Hydro-carbon.. .. .. .. 26*62 



Water . . . . 18-71 



Ash 8-91 



100-00 



and at Mount Somers a seam 25 feet thick occurs, having a composition 



of— 



Fixed carbon 39-60 



Hydro-carbon 39-20 



Water 8-80 



Ash 12-40 



100-00 

 In Otago there are brown coals of an inferior character near Oamaru ; at 

 the Green Island near Dunedin ; and several other localities in which small 

 mines only have been opened to supply local demands. 



The Green Island Mines, of which there are seven, are working 

 seams of coal from 13 feet to 19 feet thick, and to a great extent 

 supply Dunedin with household fuel. The coals have an average com- 

 position of 



Fixed carbon 40-84 



Hydro-carbon . . . . . . 36-57 



Water 18-67 



Ash 3-92 



100-00 

 24 



