✨ Coal Analysis Report
AUCKLAND PROVINCIAL GOVERNMENT GAZETTE.
Published by Authority.
Vol. VIII.] AUCKLAND, TUESDAY, FEBRUARY 15, 1859. [No. 3.
DRURY COAL.
Superintendent’s Office,
Auckland, February 9, 1859.
THE following Report of an examination of a sample of the Coal recently discovered at Drury in this Province, published in the New Zealand Gazette, is re-published for general information.
J. Williamson,
Superintendent.
Royal Mint, Sydney,
14th December, 1858.
Report on a Sample of New Zealand Coal, received for examination, November 16.
DESCRIPTION—A peculiar dull black Coal, of clean surface, so as not to soil the fingers, and bearing some slight resemblance to the Cannel Coal of England. Remarkably splinty, owing to numerous minute cracks which penetrate the Coal in all directions. Water quickly finds its way into these capillary fissures, producing a very distinct and comparatively loud decrepitating noise, and causing the Coal to become very rotten, and even to fall to pieces afterwards of its own accord. The Coal, however, is not particularly hygroscopic, that is does not abstract much moisture from the air, since a portion of it confined in moist air, above water did not increase in weight more than five or six per cent.
The fracture is very irregular and partially conchoidal, separation also taking place along the lines of bedding which are often marked by thin streaks of calcareous matter, or by very slight deposits of iron pyrites in minute crystals.
NUMERICAL RESULTS.
NEW ZEALAND COAL.
| Ash. | Carbon in Coke. | Sulphur. | Specific Gravity. | Gas per 100 grs. |
|---|---|---|---|---|
| 2'84 | 44'26 | 1'42 | '26 | 1'30 |
| 49 per cent | 49 per cent | 2 per cent | cubic in. | 152 |
Coke.—In coking this Coal gives off a large quantity of gas, but does not show the least signs of bituminous fusion or caking together. The mass remaining is scarcely distinguishable from the original Coal except that it is of less density and more broken and lustrous. It is rather incombustible.
Ash.—The Coal burns readily with a clear bright flame leaving light yellow ashes. With a stronger heat these easily run into a dark
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Auckland Provincial Gazette 1859, No 3
✨ LLM interpretation of page content
🌾 Report on Drury Coal Sample
🌾 Primary Industries & Resources14 December 1858
Coal, Analysis, Drury, Auckland, Royal Mint Sydney
- J. Williamson, Superintendent
- Royal Mint, Sydney