THE GEOLOGY OF AUCKLAND. 
21 
Per-centage composition of Lignite, from Auckland. 
Carbon .^ ... 55*57 
Hydrogen... 4*13 
Oxygen , 15*67 
Nitrogen . 1*15 
Sulphur.-— 0*36 
Ash . 9*00 
Water . 14*12 
100*00 
Coke . 50*78 per cent. 
The amount of sulphur is small, and this will be a point for 
favourable consideration in the application of the coal for 
smelting purposes. The whole of the water is expelled at a 
temperature of 1 20° centigrade. 
Dundee Gas Works, 
March 17, 1859. 
Analgsis of Auckland Coal. 
Produce of gas per ton of coal carbonized, 9,632 cubic feet. 
Illuminating power of gas, 1*75. 
Durability : the length of time that a 4-inch jet requires to 
consume a cubic foot of gas, 53 minutes. 
Specific gravity, 495. 
Produce of coke per ton, carbonized, 94 cwt. 
(Signed) John Z. Kay, 
Engineer Gas Company. 
Gas Works, Berwick, 
March 12, 1859. 
JYeio Zealand Coal . 
Gas, in cubic feet, per ton of coal, 7,617. 
Coke, per ton of coal, in lbs., 1,155. 
Tar and ammoniacal liquor, per ton of coal, in lbs., 571. 
Value of gas, per ton of coal, in lbs. of sperm, 384. 
One cubic foot of gas, burned in a No. 2 fishtail burner (or 
union set), equal sperm candles, 3*12. 
Value of one cubic foot of gas, in grains of sperm, 374*40. 
c 2 
