560 DOMAIN VI. CARBONACEOUS. 



It is worthy of remark, that as anthracite 

 has been found in a primitive glutenite or pud- 

 ding-stone, so the usual gangart of diamonds, 

 both in Hindostan and Brazil, is a ferruginous 

 pudding-stone. The author has had the satis- 

 faction of seeing one of the Deccan in the gan- 

 gart, the pebbles being an unctuous quartz ap- 

 proaching to chalcedony, as in the singular 

 sandstone of Egypt ; but some seemed impreg- 

 nated with iron, so as to bear some appearance 

 of imperfect light brown jasper. A little frag- 

 ment seemed to be siderous slate. 



Anthracite is by Mr. Kirwan called native 

 mineral carbon. He observes, that the kind 

 found at Lischwitz, in extensive strata, and that 

 of Strido in Tuscany, are among the most pure. 

 Kilkenny coal. He rightly classes the Kilkenny coal as an An- 

 thracite ; and, by his analysis, it must be one of 

 the purest, as it contains no less than 97 of car- 

 bon. But it seems of a different structure from 

 the anthracite found on the continent, having a 

 far more compact appearance, with a metallic 

 lustre at once more bright and steady ; nor is it 

 so brittle, nor so ready to stain the fingers. 

 What is called the culm of Wales by Mr. Kir- 

 wan, and which he regards as a variety of this 

 Swansea coal, species, is probably the Swansea coal, of which 



