GEOLOGICAL SOCIETY OF PENNSYLVANIA. 



221 



No. 3. 



Splint Coal from Johnson's creek. 



Has a grey black colour ; very little lustre ; fracture 

 uneven ; powder black, slightly brown ; burns easily, 

 and is not fat ; free from pyrites ; gives a hard dense 

 coke, very little swollen, leaving cinders of a dirty 

 white, free from carbonates. 



Carbon, 69.3 



Volatile matter, . . . . . . 14.6 



Cinders, 16.1 



100.0 



No. 4. 



Pitch Coal veiny Coal run^ 



Has sometimes a high vitreous lustre, at others is of 

 a dead black ; is zoned ; the divisions being frequently 

 formed of mineral charcoal ; fracture in one sense is 

 lamellar, in another conchoidal : free from pyrites. Its 

 powder is brown. Burns freely, with much flame and 

 smoke; is very fat, and swells out into a voluminous 

 coke, which, on incineration, leaves a white brown ash, 

 free from carbonates. 



Carbon, 54.26 



Cinders, ....... 27.24 



Volatile matter, 18.50 



100.00 



This analysis is scarcely derived from a fair average 

 specimen, being a portion of the outside of the vein, to 

 which some slate adhered. The bituminous matter is 

 peculiarly abundant, and the fracture resembles pitch. 



