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In fomc places the furface of the earth has been elevated by the 

 particles carried down by rain from greater elevations, or the 

 gradual [difintegration of the ftony fubftances that covered them, 

 or by various local and contingent events. Hence many remains 

 of antiquity depofited on the ancient furface are now found at con- 

 fiderable depths, particularly in countries long devafted. 



The effeds of volcanos in altering the face of the globe feem 

 to me much more circumfcribed than many late writers have affert- 

 cd : few mountains, and thofe eafily diftinguifhable, owe their 

 origin to them ; neither Vefuvius nor JEtna. were formed by them, 

 as is evident by the mafs of Neptunian ftones that compofe them ; 

 their effufions feldom reach to a great diftance, none above 

 ICO miles. Of ancient volcanos now extindt, few can be traced 

 by undoubted charadlers or hiftoric accounts. Sidonius ApoUinaris, 

 Lib. 7. Epift. I. mentions one near Vienne in Dauphine which 

 burned about the year 469 ; but by his account it is not clear 

 whether it was a volcano or a pfeudo volcano; I fufped the 

 latter. 



Tacitus alfo, at the end of the 13th Book of his Annals, men- 

 tions a volcano, or rather pfeudo volcano, that ravaged the country 

 of the Jutiones 5 this is faid by many to be that of the Ubians ; 

 if fo it muft have been in the neighbourhood of Cologn, where 

 fome pfeudo volcanic remains are traced. 



On 



