40 



The next place I shall mention, is Haut Vivarois, de- 

 scribed, by Mr. St. Fond, as an extensive basalt country, 

 reaching all the way to the Loire, abounding wish basalt 

 mountains of great elevation, buttes isoleSs, and articulated 

 prisms: but he expressly tells us, that the volcanic fea- 

 tures and productions have all disappeared; lavas or scoriae 

 are never mentioned. 



Mr. ^ Dolomieu, another sanguine advocate for the vol- 

 canic origin of basalt, and also a friend of Mr. Uesma- 

 rest, was much surprised, when he found Lisbon situated 

 in a basaltic covmtry, without a single volcanic feature, 

 or production; no scoria, as he expressly tells us. 



The late Dr. Gillan, who accompanied the Chinese em- 

 bass3% seems to have paid great attention to volcanic mat- 

 ters, whei'ever he met with them; yet, when he found 

 columnar basalt at Rio Janeiro, he neither mentions sco- 

 ria, nor any other volcanic production. 



Sir Joseph Banks gives us a most excellent account of 

 the basaltic island of Staffa, with its magnificent colon- 

 nades, and neat prisms; yet he does not mention a single 

 volcanic matter; and I can scarcely think, that scoria 

 would have escaped so accurate an observer. 



Mr. Ferber, Mr. Strange, and Mr. Saussure, tell us of 

 columnar basalt in the Veronese and Vicentin, but take 

 no notice of any scoria. 



Mr. Ferber, also, gives a particular account of different 

 varieties of basalt at Bolsena, but looks in vain for volcanic 

 features. The crater is gone, or buried in the lake, as he 

 conjectures, and no mention of scoria. 



I add 



