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Report on the Geology & Gold Fields of Otago

Coals

Coals.

Eight samples of hydrated brown coal were forwarded from the Tokomairiro coalfield, and without undergoing any previous process of drying, were analysed with the following results:—
Coke from 37 to 41 per cent., averaging 39 per cent.
Fixed Carbon from 30 to 35.5 per cent., averaging 33 per cent.
Volatile Hydrocarbons from 31 to 38 0 per cent., averaging 35.4 per cent.
Ash from 2 to 9 per cent., averaging 5 per cent.
Water from 22 to 30 per cent., averaging 27 per cent.
Five samples of Lignite were sent at various times from different parts of the Green Island field, and without previous drying yielded the following results:—
Coke 38 to 41 per cent., averaging 39 per cent.
Fixed Carbon 35 to 37 per cent., averaging 36 per cent.
Volatile Hydrocarbons 30 to 37 per cent., averaging 34 per cent.
Ash 2.4 to 3.3 per cent., averaging 2.8 per cent.
Water 25.7 to 29 per cent., averaging 27 per cent.
A sample of hydrated brown coal from the Kaitangata coalfield, without artificial drying, yielded:—
Coke 42.1 per cent.
Fixed Carbon 38.7 per cent.
Volatile Hydrocarbons 38.9 per cent.
Ash 3.4 per cent.
Water 18.0 per cent.
A specimen was sent by Mr. McArthur from Nightcaps in Southland. On analysis it showed:—
Coke 45.3 per cent.
Fixed Carbon 41.8 per cent.
Volatile Hydrocarbons 317 per cent.
Ash 3.5 per cent.
Water 23.0 per cent.