Nelson Provincial Gazette – 1868 – No. 20

Page 89

✨ Table of coal evaporation statistics

TABLE III.

Showing the QUANTITY of WATER evaporated by an equal Quantity of different kinds of COAL, calculated from Tables I. and II., on the following basis, viz.—A given quantity (represented by 100) of Average North of England Coal will evaporate 4700 cubic feet of Water in an hour, and its value for steam-producing is represented by 100 per cent.

EXAMPLE OF CALCULATION—BULLER.

Coal lbs.	Water Cub. ft.	Coal lbs.	Water Cub. ft.	Time m.s.	Water Cub. ft.	Time m.s.	Water evaporated Cub. ft.	% cent.
As 83·98	4700	: 100	: 5599	= 119·12	As 64' 12"	: 5599	: 60' 00"	: 5232

Kind of Coal.	Quantity of Coal used.	Water evaporated.	Per centage evaporated.	Time required.	Water evaporated per hour.	Per cent. of Water evaporated per hour.
	lb	Cub. ft.		m. s.	Cub. ft.
Average North of England ...	100	4700	100·00	60 00	4700	100·00
North of England ... (Mean of 10 trials)	100	4967	105·68	56 02	5318	113·14
Welsh ... (Mean of 10 trials)	100	5190	110·42	59 08	5277	112·27
New South Wales ... (Eleven different kinds)	100	4723	100·48	60 16	4702	100·04
Grey—In boxes, dead small taken out—Worst result ...	100	5212	110·89	71 57	4346	92·46
Best result ...	100	5640	120·00	62 19	5430	115·53
MEAN of 4 trials ...	100	5389	114·65	65 56	4904	104·34
Grey—In Bags, dead small—Not stoked—Mean of 2 trials ...	100	5389	114·65	67 27	4793	101·97
Stoked—Mean of 3 trials ...	100	5367	114·19	63 23	5080	108·08
GENERAL AVERAGE ...	100	5372	114·29	65 30	4920	104·68
Buller (One trial) ...	100	5599	119·12	64 12	5232	111·31

PDF — Nelson Provincial Gazette 1868, No 20

The Nelson Provincial Council Buildings (depicted) were constructed beginning with the laying of the foundation stone on 26 August 1859, with the first Council meeting held there on 30 April 1861.

The buildings served Nelson for over a century before being demolished on 12 September 1969.

✨ LLM interpretation of page content

🌾 Trials of Nelson (New Zealand) coal in comparison with North Country and Welsh coal (continued from previous page)

Domain🌾 Primary Industries & Resources
KeywordsCoal, Nelson, Statistics, Boiler efficiency, Comparison, Grey coal, Buller coal, North of England coal, Welsh coal

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