( ^IS ) 



Volcanic ; and that Santorlne, in partlcularj 

 is only one immenfe mine of pumices *. 



The objedions which may be made to 

 the relations that afcribe a volcanic orlirin 



o 



to a country, merely becaufe certain fub- 

 ftances that bear the marks of fubterranean 

 fires are found in it, permit me to fay, are 

 equally applicable to other proofs of the 

 fame kind which are by no means more 

 decifive. Here, it is faid, there mufl: have 

 been a volcano, becaufe the matters found 

 are extremely black, and therefore bear the 

 charaders of fire. There we are authorifed 

 to form the fame opinion, becaufe lavas 

 have iflued from the entrails of a mountain, 

 or volcanic veins and ilrata are found in its 

 fiiTures, 



There are many writers who, without 

 adding any other proof, ufe thefe expref- 

 fions to fignify to their readers the difco- 

 very of fome ancient volcano. I do not 



* See Chap. XIX. 



Ta deny 



