MODE III. BASALTIN. 



The same, with nodules of calcareous spar, 

 from various parts. 



The same, with red jasper, from Derbyshire. 



Basaltin, passing in veins through granite, from 

 Norway. With inherent pitchstone, from the 

 Rhine. 



Aspect 3. Basaltic Tufa. This substance has 

 been observed at Staffa, and in some other basaltic 

 countries. A considerable portion of Arthur's 

 seat, near Edinburgh, is composed of it. 



Aspect 4. Basaltic Bricia. Bricia, with frag- 

 ments of granite, on a base of basaltin, either 

 black, grey, or green, from Westrogothia in Swe- 

 den, or from Dauphiny in France. 



The same base, with fragments of quartz, from 

 the same. 



The same, with fragments of limestone, from 

 the Alps of Dauphiny. 



The same, with fragments of slate, from the 

 same, and from the mountain of Tarare, near 

 Lyons. 



The same, with fragments of granite, slate, and 

 limestone, all mingled, from Tarare, and Dau- 

 phiny. 



The same, with fragments of porphyry, from 

 the hill of Lesterelle in Provence. 



