✨ Table of coal trial statistics
86
- TRIALS OF NELSON (NEW ZEALAND) COAL, in comparison with NORTH COUNTRY and WELSH COAL, at the Trial Boiler, Woolwich, 23rd January, 1866.
| Kind of Coal. | Date of Trials. | lbs Water evaporated to 1 lb Coal consumed, calculated from 100° constant temperature feed water. | Cubic feet Water evaporated per hour, calculated from 100° constant temperature feed water. | Per centage of Clinker. | Per centage of Ash. | Per centage of both Clinker and Ash. | Width of Bars. | REMARKS. |
|---|---|---|---|---|---|---|---|---|
| Inch. | ||||||||
| COAL sent in BOXES—reported 18th December 1865. | ||||||||
| Grey Coal..... | November 17. | 9· | 39·19 | ·53 | 4·32 | 4·85 | ⅜ | |
| Grey Coal..... | November 29. | 9·49 | 42·64 | ·32 | 2·91 | 3·23 | ⅜ | No stoking tool used. |
| Grey Coal..... | December 1. | 9·47 | 43·97 | ·29 | 2·68 | 2·97 | ⅜ | Fine ash. |
| Grey Coal..... | December 4. | 9·9 | 45·25 | ·27 | 3·1 | 3·37 | ⅜ | Light grey smoke. |
| MEAN.......... | 9·46 | 42·76 | ·35 | 3·25 | 3·6 | ⅜ & ½ | ||
| Buller Coal | December 13... | 9·83 | 43·92 | ·91 | 3·3 | 4·21 | ⅜ | Ditto. |
| COAL sent in BAGS—tried since the last was reported. | ||||||||
| 1866. | ||||||||
| Grey Coal..... | January 12 | 9·46 | 40·36 | ·66 | 3·35 | 4·01 | ⅜ | |
| Grey Coal..... | January 13 | 9·46 | 43·24 | ·8 | 3·85 | 4·65 | ⅜ | |
| MEAN.......... | 9·45 | 41·8 | ·73 | 3·6 | 4·33 | ⅜ | ||
| Grey Coal..... | January 15 | 9·4 | 44·58 | ·71 | 3·6 | 4·31 | ⅜ | |
| Grey Coal..... | January 17 | 9·39 | 43·99 | ·84 | 3·6 | 4·44 | ⅜ | |
| Grey Coal..... | January 18 | 9·46 | 44·87 | ·52 | 3·1 | 3·62 | ⅜ | |
| MEAN.......... | 9·42 | 44·48 | ·69 | 3·43 | 4·12 | ⅜ | ||
| N.B.—The coal sent in bags forms rather a rougher clinker than that in boxes. | ||||||||
| NORTH COUNTRY COAL. | Mean of Ten Trials. | 8·72 | 50·32 | 2·17 | 3·71 | 5·89 | ⅜ | Made for the purpose of comparison with the trials of New Zealand coal. |
| WELSH COAL. | Mean of Ten Trials. | 9·11 | 47·75 | 1·94 | 4·22 | 6·16 | ⅜ | Made for the purpose of comparison with the trials of New Zealand coal. |
(Signed) J. TRICKETT,
Chief Engineer.
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Trials of Nelson (New Zealand) coal in comparison with North Country and Welsh coal
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🌾 Primary Industries & Resources23 January 1866
Coal, Nelson, Woolwich, Boiler efficiency, Statistics, Comparison
- J. Trickett, Chief Engineer
Nelson Provincial Gazette 1868, No 20