I 43 ] 
-'flowing from the mountains of Friuli. I therefore doubt: 
.not but thefe provinces alfo abound with vulcanic phae*- 
Homena, though I have never had an opportunity to vh 
lit them. I mention thefe circumftances more willingly, 
lince it has been generally imagined, that the northern 
parts of Italy contained few, if any, fuch produdlions. 
They are, however, not only full as common, but, if I 
miflake not, more inftru6tive than thofe of any other 
province of that country. For, belides the phaenome- 
non of Monte Roflb, on the importance of which I have 
already infilled, and the other curious vulcanic produc- 
tions of the Euganean hills, I muft obferve, that, from 
the inordinate courfe of the Appenines in general, the 
vulcanic hills of that chain afford no obfervation fo in- 
terefling to phyfical geograj^hy and the theory of fuch 
jihaenomena, as that before remarked of the correfpon- 
dent dire6lion and parallelifm of the vulcanic and other 
branches of the Veronefe and Vicentine diflri6ls. My 
obfervations alfo, on the vulcanic branches of thefe dif- 
trids, do not feem to agree with the celebrated Monf. 
guettard’s principle, who fuppofes that all vulcanic 
materials obfervable in calcareous countries are adventi- 
tious; the contrary of this being indeed demonflrated 
by the fadts I have advanced. Nor have I entered parti- 
cularly into an account of my vulcanic tour in the Vene- 
tian ftate, that I might not abufe myfelf of the fufferance 
of fo refpedlable a Society by an uninterefiiing detail of 
(s) Memoire fur la Mlneralogie d’ltaliej in the firli volume of his Memoires 
fiir les Sciences et les Arts, 
G 3 fadls; 
