536 



1.977 grammes gave of brown ash 0.342. 

 11. 540 gave on ignition 5.920 ot coke. It consisted 

 hence of — 



Volatile matter 48.70 



Pure coke 34.00 



Ashes n.30 



100.00. 

 When ignited with litharge, one part produced 22 parts 

 of lead. 100 parts of it are therefore equivalent to 65 parts 

 of pure carbon. 



IV. COAL OF THE ANTRIM DISTRICT. 



The coal of Ballycastle is dull, bkick; sp. gr. 1.279. 

 On ignition it gave out much gas, frothed, and left a porous 

 coke. On its practical analysis it gave in 100 parts 



Volatile matter 36.96 



Pure coke 45.94 



Ashes 17.10 



One part of it produced 25 of lead, and 100 are therefore 

 equivalent to 71^ parts of pure carbon. 



V. LIGNITES OF LOUGH NEAGH. 



Having thus determined the composition, and more im- 

 portant practical relations of the coals from the several coal 

 districts of Ireland, Dr. Kane proceeded to examine the 

 nature of the deposit of lignite which is found among the 

 tertiary beds along the southern extremity of Lough Neagh. 

 As these investigations had solely a technical object, the 

 silicified wood of that district did not require any notice, 

 but only such wood-coals as were capable of use as fuel, 

 Two specimens were examined. They retained all the 

 structure of wood, and were of a deep brown colour. When 

 ignited they gave off gas, which burned brilliantly, and left a 

 dense black charcoal. 



On elementary analysis, they gave the following results : 



