533 



Hence it contained : 



Carbon 79.69 



Hydrogen 6.24 



Oxygen 3.32 



Ashes 10.75 



100.00 



ROVER COAL. 



This coal is rather brown in aspect, and splits easily into 

 cubical fragments. On ignition it gives out gas, but does 

 not froth. Its coke is porous, slightly coherent. 

 Its elementary analysis was : 



3.196 grammes gave . . . 0.237 of ashes, 

 equivalent to 7.41 per cent. 

 0.489 gramme gave : 



Water 0.216 



Carbonic acid 1.453 



Hence it contained : 



Carbon 81.04 



Hydrogen 4.91 



Oxygen 6.64 



Ashes 7.41 



100.00 



The practical analysis of these two coals gave the follow- 

 ing results : 



Aughahehy Coal. — 13.418 grammes gave on ignition 

 10.340 of coke. 



Rover Coal. — 14.300 gave on ignition 11.770 of coke. 



Hence they consisted of: 



Aughabehy. Kover. 



Volatile matter . . . 23.10 . . 17.70 



Pure coke 66.15 . . 74.89 



Ashes 10.75 . . 7.41 



100.00 100.00 



