Galilei, Galileo, Discourse concerning the natation of bodies, 1663

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The Ancients
denved
Aoſolute
Levity
.
This is all that I have been able to collect, as produced againſt
Archimedes by Signor Buonamico: who hath not well obſerved the
Principles
and Suppoſitions of Archimedes; which yet muſt be
falſe
, if the Doctrine be falſe, which depends upon them; but is
contented
to alledge therein ſome Inconveniences, and ſome
nances
to the Doctrine and Opinion of Ariſtotle. In anſwer to which
Objections
, I ſay, firſt, That the being of Archimedes Doctrine,

ply
different from the Doctrine of Ariſtotle, ought not to move any
to
ſuſpect it, there being no cauſe, why the Authority of this ſhould
be
preferred to the Authority of the other: but, becauſe, where the
decrees
of Nature are indifferently expoſed to the intellectuall eyes of
each
, the Authority of the one and the other, loſeth all
neſs
of Perſwaſion, the abſolute power reſiding in Reaſon; therefore
I
paſs to that which he alledgeth in the ſecond place, as an abſurd

ſequent
of the Doctrine of Archimedes, namely, That water ſhould
be
more grave than Earth.
But I really find not, that ever
medes
ſaid ſuch a thing, or that it can be rationally deduced from his
Concluſions
: and if that were manifeſt unto me, I verily believe, I
ſhould
renounce his Doctrine, as moſt erroneous.
Perhapsthis
ction
of Buonamico, is founded upon that which he citeth of the
ſſel
, which ſwims as long as its voyd of water, but once full it ſinks to
the
Bottom, and underſtanding it of a Veſſel of Earth, he infers againſt
Archimedes thus: Thou ſayſt that the Solids which ſwim, are leſs grave
than
water: this Veſſell ſwimmeth: therefore, this Veſſell is leſſe grave
than
water.
If this be the Illation. I eaſily anſwer, granting that this
Veſſell
is leſſe grave than water, and denying the other conſequence,

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