DOMAIN VI. CARBONACEOUS. 



reous valleys, or which lean against the hills 

 which skirt them. It is also found, but more 

 rarely, in argillaceous marl. 



" This combustible is common enough in the 

 south of France, particularly in the department 

 of Vaucluse. I have found it under the 

 stances I have just mentioned, at Piolin, near 

 Orange. 



(t It is found in very large mass, at Ruette, 

 department of the Forests. 



<e It easily burns, but emits a very disagree- 

 able odour. It can only be used in manufac- 

 tures, and to burn lime. Smiths cannot use it 

 in their forges. 



" 3. Fibrous lignite *. Its colour varies from 

 a clear blackish brown to a clove brown. It 

 has a perfect woody form and texture, conse- 

 quently its longitudinal fracture is fibrous, and 

 in its transverse fracture are perceived the annual 

 circles of the wood. 



" It is easier to break than wood ; under the 

 knife it assumes a kind of lustre. 



cc This lignite is sometimes found in consider- 

 able masses. 



" It is found in France, in the neighbourhood 

 of Paris, near St. Germain, in the isle of Chatou, 



" * Gemeiner-lituminoses-holz, common bituminous wood. 

 Wern." 



