Hardman — On Analysis of Coals and Iron-stones. 533 



Heating Powee. — lib. of the coal evaporates 12-65 lbs. of water 

 at 212° F., and 1 cubic foot of coal evaporates 1125'061bs. of water at 

 212° F. 



This coal is now only worked in two pits in the townland of 

 Annagher, where both in quality and thickness the seam has greatly 

 deteriorated, according to the reports of those who have been engaged 

 working it. The specimens obtained were of very poor appearance, 

 being dull, slatey, and lumpy, and composed of thin bands of coal 

 alternating with layers of shale and sulphate of lime. The seam is 3' 

 to 3'6" thick. Only a partial analysis has been yet made. The ash 

 is plentiful, and of a dii'ty, red colour, and the coal contains much iron 

 pyrites (sulphide of iron). 



It is remarkable that this coal has such a high heating power, 

 considering the very large amount of ash it contains. But as much of 

 the ash consists of ii'on oxide, resulting from the ignition of the iron 

 pyrites, so abundant in the coal, some of the heat is, no doubt, due to 

 the combustion of the sulphur in the pyrites. 



No. 6. — Beltiboy Coal. From Mr. Slone's pit, Gortnaskea. 



A^TALTSIS. 



Volatile matter, including sulphur and water, . 49*40 



p 1 ( Fixed carbon, 48" 17 



^^^^' (Ash, 2-43* 



100-00 



Water at 212° F., 



. 4-30 per cent 



Sulphur, . . 



. 1-52 „ 



Ash in coke. 



. 4-86 „ 



Specific gravity, 



. 1-266 



Heatixg Powee. — lib. of the coal evaporates 12-82 lbs. of water 

 at 212° F. ; and 1 cubic foot of the coal evaporates 1006-25 lbs. of water 

 at 212° F. 



This is the next workable coal above the Derry coal, but between 

 them, in 50 yards or so, there are 4 or 5 thin coals of very good 

 quality which have been occasionally wrought at the outcrop. The 

 Beltiboy coal is about a yard thick, or 3'6" sometimes, and like most 

 coal seams, consists of several bands of various quality ; some parts 

 have even been used for gas. 



!N'o. 7. — Gortnaslcea Coal. 



Above this coal comes the Gortnaskea seam, a coal 6 feet thick, 

 including 22 inches of cannel at the top. I have only been able as 

 yet to make a partial analysis of the cannel. In appearance, however, 



Tm'o experiments. 



