24 On Volcanos and Earthquakes. 
ting the circumstance of the retreat of the sea from the shore, 
Ww Hel Saar in both those great eruptions, and not in 
this, 
The water of the sea not retiring from the coast in this 
eruption seems to be an anomaly. Whether the suction or 
aspiration was performed too slowly, or too far from the 
0 be observed, or whether it did not take place at all 
from the sea, still we are in no apprehension of seeing an 
eruption without the presence of water ; for, in the same re- 
lation, a few lines lower, we read : 
“ The water at the great omnia. at Torre del Greco esa 
to decrease some days before the eruption. volt ene 
= the other wells of the to town and its ne 
xed SuDeereistl noises were heard at Resina for two days be- 
fore the eruption. Soon after the beginning of it, ashes fell 
thick at the foot of the mountain....and though there were not at 
that time any clouds in the air, the ashes were wet, eo, 
with large drops of water, which were to the taste very salt...... 
* After some ae the lava ran in eo Te | rng an nd with 
incessant reports, like those from a numerous heavy artillery, 
er anied by a contra hollow statin, like that of the 
the ocean during a violent storm; and, added to these, 
was another blowing noise, which brought to my mind that noise 
which is px roduced by the action of enormous bellows at the fur- 
® Carron iron compete: in Scotland, and which it per- 
) yet 
If this last pana had been written with the direct in- 
tention of supporting our oy: og uld Sir Wm. Hamilton 
have made use of other expressi 
-.We will here recapitulate in a ae words the whole of the 
pothesis. We have endeavored to establish—that the sur 
pre eed earth, as deep as four miles and seven-eighths, is 
he domain of water ; that it cannot penetrate deeper, as it 
