530 Proceedings of the Royal Irish Academy. 



By the kind permission of Professor Galloway, the analyses were 

 for the most part performed in the very complete laboratory under 

 his control at the E,oyal College of Science, Dublin. 



Analyses op the Coals oe the DxnfGAKis^ois" Coal-Field. 



LOWEE, CoAL-MEASTTEES. 



No. 1. — Main Coal or Brumglass Coal. Lurgaboy (Top). 



Analysis. 

 "Volatile matter (including sulphur and water), 48'00 



Coke 



Eixed carbon, 47'43 



Ash, 4-57 



100-00 



"Water at 212° P., . 2-49 per cent. 

 Sulphur, .... 2-80 ,, 

 Ash in coke, . . 9-05 ,, 

 Specific Gravity, . 1-295 



Heating Powee. — 1 lb. of the coal evaporates 12-86 lbs. of water 

 at 212° F.; and 1 cubic ft. of the coal evaporates 1109-68 lbs. of water 

 at 212° F. 



The above forms the uppermost portion of the main seam. It is 

 an extremely good coal, not yielding in quality to the best English 

 specimens. Although somewhat hard, and occasionally difficult to 

 kindle, it burns with a very brilliant flame, abounding, as it does, in 

 gas-forming materials. The ash is small in quantity, and light coloured. 

 The heating power is very high. This portion of the seam varies in 

 thickness from 1'4" in Lurgaboy, to I'lO" in Drumglass, and nearly 

 3' in Congo, and is separated by a band of black shale or fire-clay 

 called '■'■clearing,^'' which is three feet thick in Lurgaboy*' — from the 

 bottom coal. 



No. 2. — Main Coal. Lurgaboy (Bottom). 



Analysis, 



Volatile matter, including sulphur and water, . 37-19 



,^ 1 ( Fixed carbon, 51-53 



t<^«^^ Ush, 11-28 



100-00 



t Water at 212° F., 



. 5-72 per cent. 



Sulphur, . . . 



. 1-65 „ 



Ash in coke, . . 



. 17-95 „ 



Specific gravity, 



. 1-385 



* Towards the west of the Coal-field the " clearing " diminishes to a couple of 

 layers, a few inches thick only, 

 t Mean of two experiments. 



