i44 Analysis of various Kinds of Pit- Coat. 



Stone Coal, from Boolavooneen, Ireland: 



Specific gravity 1*436. 



Volatile matter slightly bituminous 13* SO 



Carbon - 82*96' 



Ashes of a brownish-red colour 3*2.4 



100 parts. 



Stone Coaly Specimen marked Corgee, Ireland. 

 Specific gravity 1*403. Component parts, 



Water and hydrogen - 9*100 



Carbon - 87*491 



Ashes clay-brown colour - 3*409 



100 parts. 



Stone Coal, Specimen marked No. 39, Queen's County, 

 Ireland. 



Specific gravity 1*403. Component parts, 



Water and hydrogen - 10*300 



Carbon - ' - - 86*560 



Ashes - 3*140 



100 parts. 



It is worthy of remark, that the coke obtained from stone 

 coals in general is of a greater specific gravity than the coal 

 itself, and that it is very difficult, after the operation of coking- 

 is performed, to distinguish between these two different states. 



Stone Wood, from the Giants' Causeway, Ireland. 

 Specific gravity 1*150. Component parts, 

 Lost in light-coloured flame resem- 

 bling that of wood - - 33*370 

 Carbon - - 54*697 

 Ashes ochrey-brown colour - 11*933 



100 parts. 



Apiece of well-dried Oak was found composed of 

 Volatile matter - 80*0 



Carbon - - 19*5 



Ashes deep brown - *5 



100 parts. 



20 grains 



