[ ^8 ] 
by the very rnoifl Areara that iffues from the cracks 
in the plain of the Solfaterra, which, like that of 
boiling water, runs off a fword or knife, prefented to 
it, in great drops. On the outfide, and at the foot 
of the cone of the Solfaterra, towards the lake of 
Agnano, water ruAies out of the rocks, fo hot, as to 
raife the quickhlver in Fahrenheit’s thermometer to 
the degree of boiling water, a fad of which I was 
myfelf an eye-witnefs. This place, well worthy the 
obfervation of the curious, has been taken little notice 
of; it is called the Pifciarelli. The common people 
of Naples have great faith in the efficacy of this 
water, and make much ufe of it in all cutaneous 
diforders, as well as for another diforder that prevails 
here. It feems to be impregnated chiefly with ful- 
phur and alum. When you approach your ear to 
the rocks of the Pifciarelli, from whence this water 
ouzes, you hear a horrid boiling noife, which feems 
to proceed from the huge cauldron, that may be fup- 
pofed to be under the plain of the Solfaterra. On 
the other fide of the Solfaterra, next the fea, there 
is a rock which has communicated with the fea, till 
part of it was cut away to make the road to Puzzolej 
this was undoubtedly a confiderable lava that ran from 
the Solfaterra when it was an adive volcano. Under 
this rock of lava, which is more than feventy feet 
high, there is a flratum of pumice and allies. This 
ancient lava is about a quarter of a mile broad; you 
meet with it abruptly before you come in fight of 
Puzzole, and it finifbes^as abruptly within about an 
hundred paces of the town. 1 have often thought 
that many quarries of flone upon examination would 
be found to owe their origin to the fame caufe, though 
lime 
