572 DOMAIN VI. CARBONACEOUS. 



coal y which is that substance universally known 

 by the sole name of COAL, which is diffused in 

 vast exuberance through half the globe, and 

 supplies nations with necessary fuel and opulent 

 manufactures ! This instance of want of judge- 

 ment may be added to numerous others already 

 observed by Mr. Chenevix *. 



The fourth subspecies of Werner is cannel coal, 

 so called from the enunciation of the word candle, 

 in Scotland and the north of England, because 

 its flame is clear and pure, like that of a candle. 

 By many French writers, and even by Brochant 

 and Brongniart, it has been strangely confounded 

 with Kilkenny coal, which being an anthracite 

 emits no flame ; a clear distinction, indicated by 

 the simplest chemistry of nature. It is not only 

 found in several coal mines of the north of En- 

 gland, but in those of Gilmerton near Edinburgh. 

 When very pure, it is made into various little 

 vessels, snuff- boxes, and ink-holders. The Ro- 

 man writers mention jet, as a chief mineral pro- 

 duct of Britain, and some suppose that the can- 

 nel coal is intended, but it would rather appear 

 to be the real jet found on the eastern coasts, 

 particularly that of Norfolk, and which, as the 

 substance is merely bituminous wood, may either 



* See his Critique on the Wernerian system, in the Annettes d? 

 CMmie, 180Q. 



