xx. P Pv E F A C E. 



the volcanic grounds reach from thence to the 

 very gates of Rome, mid its neighbourhood, 

 at Frafcati, Grotta Ferrata, Caftel-Gandolfo, 

 Albano, Tivoli, Caprarola, Viterbo, . and 

 Loretto ; thefe have never been noticed 

 by hiftorJans as being at all fubject to vol- 

 canic eruptions x . In this particular he 

 may, perhaps, have been improved by the 

 Learned in Italy, fuch as P. la Torre % Giov. 

 'Targioni Tozzetti 3 , and Giov. drdumi, who, 

 about that time, publifhed their mine*- 

 ralogical obfervations on feveral parts of 

 Italy: " but he was certainly the firft, who, 

 * on this fide of the Alps, in Dauphine, 

 " Provence, and feveral other places, found 

 marks of ancient volcanos ; fo evident, 

 " that his only aftonifhment was, that thefe 

 " his conjectures (hould appear new, and 

 be thought whimiical, in a country, where, 

 *' according to his opinion, in order to form 

 " the like conjectures, it is fufficient merely 

 6 to open one's eyes 4 ." 



1 LaCondamire'sTour to Italy, 1763, 9.125. 



a Stcriadel Vefuvio, 1756. 



3 Viaggi di Tofcana. Firenze, 1751 54, 6vol. 8vo, 



La Condamine's Tour, p. 134, 135. 



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