DOMAIN VI. CARBONACEOUS. 



burns very well, and even with a kind of flame. 

 2. Woody fruits, the size of a nut, and which 

 have been known to be those of a species of the 

 palm tree (areca). The lignite of Cologne con- 

 tains about 0,20 of ashes, rather alcaline and 

 ferruginous (Ant. L. Brongniart.) Its uses are 

 various ; it is worked in open air with a simple 

 spade ; but the more easily to transport it, it is 

 wetted, and moulded in vases, which give it the 

 form of a truncated cone. 



" It is used as fuel in the environs of Cologne. 

 It burns slowly but easily, and without flame, 

 like tinder, giving a lively heat, and leaving very 

 fine ashes. These ashes being considered as a 

 very good manure, to obtain them a part of 

 this lignite is burnt on the spot where it is 

 wrought. 



" Earth of Cologne is more especially used 

 for painting in distemper, and even in oil co- 

 lours. The Dutch use it to adulterate their 

 snuff; when it is not mixed in too great a quan- 

 tity it gives the snuff a fineness and softness, 

 which is much esteemed, and cannot be in the 

 least injurious. (Faujas.) 



" This lignite is also said to be found in Hessia, 

 Bohemia, Saxony, Iceland, &c. (Brochant) j but 

 as there has been a confusion between this com- 

 bustible and the variety of ochre, called umber* 



