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pumices of LIpari with a remark relative 

 to their colour. Except a few that are 

 dark, they are all white as fnow. Hence 

 the mcuntaiii of Lipari, which forms the 

 great magazine of thefe ftones, is called 

 Campo B'uvico (the White Field) : but cer- 

 tainly there muft have been a time when 

 it fliould have been denominated Campo 

 Nero (the Black Field) ; at leaft it is certain 

 that pumices when newly ejeded from 

 volcanos are of a black colour. This re- 

 mark, which has been omitted by almoft 

 all who have made obfervations on this 

 fubjed, who content themfelves with faying 

 that this or the other volcano throws out 

 pumices, has been exprefsly made by Don 

 Gaetano de Bottls in his " Hiftory of the 

 Conflagrations of Vefuvius *." He tells 

 us, the pumices ejeded at various periods 

 by this volcano are black. He likewife 

 remarks, that on comparing them with thofe 

 which overwhelmed Pompeii, he found 

 them perfedly fimilar in their ftrudure. 



* Iftcria di varj Incendj del Vefuvlo. 



Their 



