MODE I. GRAPHITI. 54? 



masses, or compact lumps, with a granular frac- 

 ture, the grains more or less fine. 



" Graphite seems to belong exclusively to pri- 

 mitive regions : sometimes it enters into the com- 

 position of the rocks which form those regions; 

 sometimes it is found in masses, or in consider- 

 able layers. It is likewise met with in beds of 

 argillaceous schistus. 



" It is found : in France, in the department 

 of Arriege, in large compact masses ; in the de- 

 partment of Mont Blanc ; in that of Sture, near 

 Vinay, above the baths ; in the mountain of 

 Lubacco, and in that of Gogni d'Orgial, in small 

 veins in granite. In the valley of Pellis, district 

 of Pignerol, department of the Po, in veins of a 

 yard in thickness, in granitic rock (Bonvoisin). 

 In Spain, near Sahun, district of Benabarra, in 

 the mountains of Arragon (Parraga), and near 

 Casalla and Ronda in the kingdom of Grenada. 

 In Bavaria : in Norway near Arindal ; this is the 

 laminar variety. In England, at Borrodale, two 

 miles from Keswick in Cumberland, this is the 

 most celebrated graphite mine ; pencils of an 

 excellent quality are made of it, and recommend- 

 able, as being at once firm and soft. The bed of 

 graphite is in a rather high mountain, between, 

 layers of a slaty schistus, crossed with veins of 



2 N 2 



