'From the aforegoing Hiftory, we may take occafion to 
rcfled: a little upon the manifold Variety of exhalations 
prepared in, and ily ing out from the vaft Magazines ^ and 
leverall reconditories below, as to their qualities and ef- 
feits J fome being cold, and dry, refembiing air, or wind, 
as thofe near P^ro:^/, and in the Caverns of Mountains, 
efpecially thofe of ^c?/^/. and other hills of Italy , as al- 
fo in mines upon the meeting of water 5 others are in- 
flammable, and of a bituminous nature, though not ac- 
tually warm, as thofe near Wigan in Lancajhire j and thofe 
as I conje(fture, ("for I never law them,) at the much talk't 
ofburning fountain in Bauphifie : there are alio many 
fleams very hot. Sulphureous, andfaline more efpecial- 
ly thofe in the naturall ftoves, fweating vaults, grotts, 
baths, and the Vt^c and s nQ,2iY Naples^ Baj\e, Cuma, and 
Tm^^uoloj asalfoin fome of the lubterraneous works at 
l^me ; others there are of an Arfenical, and fuch like ve- 
nenofe equalities, as in the Grotta del Cane on the Bank of 
t\it lago ;inmany mmesi inpoyfonous fprings; 
and lakes 3 now thefe various fteams meeting with, and 
running through waters, muft caufe a great variety of 
Phtenomena, and effedls in them. 
Whether this great diverfity proceeds from the Va- 
rious breaths of the Pyrites, and the lapis Calcarim, whilft 
under their different ftates, and changes, or from other 
lorts of effluviums, (the ftore of nature being vaft, and 
very copious j I dare not determine j however I am con- 
vinced that Sulphur is fublimed from the Pyrites, accord- 
ing to the opinion of that moft excellent Naturalift, and 
Univerfally learned Phyfitian Dr. Martin Lifien efpe- 
cially that gathered upon Mount jEtna, Vejuvim, the Sol^ 
fatara, (antiently calfd Campo Phlegrcei, Leucogei, and 
forum Vulcani,) and in the ftoves of S.Gennaro, not far from 
thence; for moft of the ftones and Cinders, thrown ou t of 
thofe mighty furnaces do manifeftly contain Iron , if we 
-may believe the Magnet: as to the fait (taken by many 
' ~ writers 
