ITALY. L E T T E R V. 63 



11 monte di Diavolo, near S. Giovanni flarione, 

 in the Vicenza *, is a columnar bafalt-hill , con- 

 lifting of black hard prifms> of four, five, fix, 

 and feven fides, in an oblique pofition, their 

 heads pointing to the Weft, and their feet to the 

 Eaft. The whole mountain, on both fides of the 

 valley of S. Giovanni Ilarione, is volcanic, and 

 compofed of lava ; but a fingle part, on the Eaft 

 fide, is columbar and called // Scoglio del Diavolo, 

 The under part of this hill is calcareous, or an 

 Alpine fummit, covered by ftrata-tertiaria. 



In monte Ronca is likewife a bed of prifmatical 

 lava, which I have mentioned already. 



The Piperini, indurated afhes, cemented with 

 micaceous Iherl-lamelles, are found around the vol- 

 canos ; together with hills of loofe ferruminated 

 alhes, of a grey or brown colour : for example, 

 at Braganza, Sarcedo, Montechio, Precakino, Zo- 

 jano, and feveral other places in the Vfcentine 

 diftricl:. 



Moft of thefe volcanos have broken 'their way 

 through the calcareous Alps or hills ; accordingly 

 they are deftitute of the regular and ufual forr ^ 

 of other volcanos ; but the Euganean hills n car 

 Padua, which rife in the plain between thatf 

 and the Alps, have a regular form, being en 



f Defcnbed and engraved in this above account of Mr. 



ifolatc 



