204 On the Vents of Hot Vapor in Tuscany. 
gaseous orifices into mud volcanos. Nor can we any longer recs 
enna a hot lagone approaching to the diameter of sixty braccie 
which Targioni gives as the maximum size; still less have we 
a little island floating in such a ho 
lake. The noises and oe 
in the caverns, which he compared t a 
the beating of a hundred falline-mills, 
2. Ground plan. 
issue so regulated. We learn, however, 
fi e above-mentioned faithful his- 
torian two points of importance in the 
consideration of these forms of volcanic 
action :—Ist. That although the lagoni 
were then said to be increasing in num- 
ber, one of the orifices at Monte Cer- 
boli, and another at Castel Nuovo, had 
ceased to act in histime. 2ndly. "That 
flames were said to issue by night.* 
hat a connection exists between 
the Soffioni and the former geological 
efuptive agency of Tuscany is appar- 
ent, the moment we collate the a 
and the former phenomena. The in- 
ference is indeed determined by an sai 
peal to the —. line under consider. 
tion. (see fig. 2.) Beginning at the 
nor thy toy Scone, we see at 8S. Michele 
a copious erg of serpentine and 
gabbro, and with it much contortion 
\ Minevel springs. 
Se Tract covered 
Bij: 25) by tertiary 
eee —— 
1, depo 
+5 
ca! 
Sf, 
a 
7 
the hot springs of 'S. Michele, celebra- 
ted for many ages for their medicinal ‘ 
Virtues, have their issue. Proceeding Pasni a peccianas \ 
thence over undulating ground, for the 
most part occupied by tertiary tuff, we 
again find at Monte Cerboli ( Mons Ce- . 
> sagt on the § 8. by E., a like conjunc- 4,4. Albere Rape seeesiae * rete 
of the before-mentioned hot- mabe “ Fines he 
Thenceforward to the S. by E.,, 
* Targioni Seen ie ——. da Monte Catini’s description of the fumes at 
Castel Nuovo, e baths of Bagni a Morbo, and cites his omission of any al- 
lusion to those of 3 ‘Moone ‘Cerboli as an indication that the latter have burnt 
- since that time, 
