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The Pamphlet Collection of Sir Robert Stout: Volume 32
Character of Coal
Character of Coal.
Professor Black, of the Otago University, gives in his Annual Report for 1875, the following analysis of the Kaitangata Coal, which was, I understand, made from a sample picked up by himself on the ground.
| Coke | 42.1 per cent. |
| Fixed Carbon | 38.7 per cent. |
| Volatile Hydro-Carbon | 38.9 per cent. |
| Ash | 3.4 per cent. |
| Water | 18.0 per cent. |
| Coke | 45.0 per cent. |
| Fixed Carbon | 40.88 per cent. |
| Volatile Hydro-Carbon | 35.76 per cent. |
| Ash | 4.05 per cent. |
| Water | 19.31 per cent. |
In contrast with these, I subjoin average results of analysis of eight samples of Tokomairiro and five of Green Island coals, also taken from Dr. Black's report for 1875.
| Tokomairiro. | Green Island. | |
|---|---|---|
| Coke | 39 per cent. | 39 per cent. |
| Fixed Carbon | 33 per cent. | 36 per cent. |
| Volatile Hydro-Carbon | 35.4 per cent. | 34 per cent. |
| Ash | 5 per cent. | 2.8 per cent. |
| Water | 27 per cent. | 27 per cent. |
From the above it will be seen that the Kaitangata Coal is at least 7 per cent, better than any local production that can be brought into competition with it. But this does not show the full measure of its superiority. The Kaitangata Coal has less sulphurous and other obnoxious gases in its composition, and makes a clearer and more cheerful fire than the other two; consequently, it is preferable for household purposes.