MODE III. EASALTlN. 67 



been observed by Agricola, the restorer of mine- 

 ralogy in the sixteenth century. Whatever be 

 their origins, these two substances are identically 

 the same ; as the same results may be produced 

 either by the humid or the dry processes of che- 

 mistry. 



Aspect 1. Uniform. The columnar basaltin 

 had, as already mentioned, attracted great atten- 

 tion by the beauty and regularity of its forms, as 

 early as the sixteenth century ; but trap, or stra- 

 tiformed basalt, may be called a discovery of the 

 Swedes. The hill of Kinnekulla, in Westrogothia, 

 was one of the first observed ; and also that of 

 Hunneberg, in the same province. 



Black basaltin, from Kinnekulla and other parts 

 of Sweden. 



Grey basaltin, from the same. 



Greenish, from Norberg. 



Reddish, from Sweden. 



Black basaltin, with small needles or scales of 

 siderite, from Sweden. 



Stratified basaltin, from Faroe, Stafta, the 

 Giants' Causey, &c. where it sometimes underlies 

 the columnar. 



The same, from the castle hill of Edinburgh, 

 Dumbarton, and other parts of the south of Scot- 

 land. 



