ITALY. LETTER XIV. 199 



The afties of the Albano Volcano have been 

 fpread up to Poli, a place which lies eight Italian 

 miles in the Apennines. * v -' 



At the foot of monte Colonna is Lago di Regilla, 

 which has been an old volcanic crater. 



Lago di Cajliglione has been probably of the fame 

 nature, and would have been on this account the 

 remoteft crater of the Alban mountains. 



The quarries of the Piperino, employed at 

 Rome in buildings and fculpture, are near Marino. 

 I have defcribed already the nature of this volcanic 

 ftone. 



The quarries of the black compact lava of the 

 Alban volcano, which is called Selce, are near 

 Albano alle Fratocchie, and alia Cava de Selci. It 

 is employed at Rome, and the adjacent places, in 

 the pavings of the roads and ftreets ; in ftatues ; 

 and in reflorations of old mutilated oriental bafalt- 

 ilatues : in which cafe, this lava, or felce, is called 

 occidental bafaltes. I have had an opportunity to 

 be convinced of it. The ufual garnet-like white 

 cryftallizations are now and then found in it ; but 

 then they do not employ it. The black fherl and 

 the green and yellow pebbles of the Vefuvia.n lavas 

 are likewife found in this. 



Dionyfius of Halicarnafius tells us, that a king 



pf Alba was fwallowed up with his palace in the 



Lago d* Albano. And Livy, lib. i. has the fol- 



O 4 lowing 



