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diverfe diforders, by a flirong perfpiratlon. This place 
is called the Sudatorio di San Germane ; near the 
prefent bagnios, which are but poor little hovels, 
there are the ruins of a magnificent ancient bath. 
About an hundred paces from hence is the Grotto 
del Cane ; I flaall only mention, as a further 
proof of the probability that the lake of Agnano 
was a volcano, that vapours of a pernicious quality, 
as that in the Grotto del Cane, are frequently met 
with in the neighbourhood of Etna and Vefuvius, 
particularly at the time of, before, and after, great 
eruptions. The noxious vapour having continued in 
the fame force confiantly fo many ages, as it has done 
in the Grotto del Cane (for Pliny mentions this 
Grotto), is indeed a circumftance in which it differs 
from the vapours near Vefuvius and Etna, which 
are not conftant j the cone forming the outfide of this 
fuppofed volcano is ftill perfedt in many parts. 
Oppofite to the Grotto del Cane, and immediately 
joining to the lake, rifes the mountain called Afiruni, 
which, having, as I imagine, been thrown up by an 
explofion of a much later date, retains the conical 
fliape and every fymptom of a volcano in much 
greater perfedlion than that I have been deferibing. 
The crater of Aftruni is furrounded with a wall to 
confine boars and deer (this volcano having been for 
many years converted to a royal chace). It may be 
about fix miles or more in cicumference j in the plain 
at the bottom of the crater arc two lakes, and in 
fome books there is mention made of a hot fpring, 
which I never have been able to find. There are 
many huge rocks of lava within the crater of Aftruni, 
and ibme I have met with alfo in that of Agnano j 
the 
