Galilei, Galileo, The systems of the world, 1661

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1nerating and decaying; winds, rains, tempeſts, ſtorms ariſing; and
in a word, the aſpect of the Earth to be perpetually
ſing; none of which mutations are to be diſcern'd in the Cœleſtial
bodies; the conſtitution and figuration of which is moſt
ally conformable to that they ever were time out of mind; without
the generation of any thing that is new, or corruption of any thing
that was old.
SALV. But if you content your ſelf with theſe viſible, or to
ſay better, ſeen experiments, you muſt conſequently account
China and America Cœleſtial bodies, for doubtleſſe you never
beheld in them theſe alterations which you ſee here in Italy, and
that therefore according to your apprehenſion they are
terable.
SIMPL. Though I never did ſee theſe alterations ſenfibly in
thoſe places, the relations of them are not to be queſtioned;
beſides that, cum eadem ſit ratio totius, & partium, thoſe
Countreys being a part of the Earth, as well as ours, they
muſt of neceſſity be alterable as theſe are.
SALV. And why have you not, without being put to believe
other mens relations, examined and obſerved thoſe alterations
with your own eyes?
SIMPL. Becauſe thoſe places, beſides that they are not
poſed to our eyes, are ſo remote, that our ſight cannot reach
to comprehend therein ſuch like mutations.
SALV. See now, how you have unawares diſcovered the
cy of your Argument; for, if you ſay that the alterations that
are ſeen on the Earth neer at hand, cannot, by reaſon of the too
great diſtance, be ſeen in America, much leſſe can you ſee them
in the Moon, which is ſo many hundred times more remote:
And if you believe the alterations in Mexico upon the report of
thoſe that come from thence, what intelligence have you from
the Moon, to aſſure you that there is no ſuch alterations in it?
Therefore, from your not ſeeing any alterations in Heaven,
whereas, if there were any ſuch, you could not ſee them by
ſon of their too great diſtance, and from your not having
ligence thereof, in regard that it cannot be had, you ought not
to argue, that there are no ſuch alterations; howbeit, from the
ſeeing and obſerving of them on Earth, you well argue that
therein ſuch there are.
SIMPL. I will ſhew ſo great mutations that have befaln on
the Earth; that if any ſuch had happened in the Moon, they
might very well have been obſerved here below.
We find in

very antient records, that heretofore at the Streights of Gibraltar,
the two great Mountains Abila, and Calpen, were continued
gether by certain other leſſe Mountains which there gave check

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