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

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            <pb pagenum="467"/>
            <p type="margin">
              <s>
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              The greater
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              Specificall, not
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              the greater
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              ſolute Gravity,
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              is the Cauſe of
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              Velocity.</s>
            </p>
            <p type="margin">
              <s>
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              Any Maſs of
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              water ſhal move
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              more ſwiftly,
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              than any of Air,
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              and why.</s>
            </p>
            <p type="main">
              <s>Therefore, the Fallacy lyes more in the Diſcourſe of
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              Ariſtotle,
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              than
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              in that of
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              Democritus,
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              who with ſeverall other Reaſons might oppoſe
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              Ariſtotle,
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              and alledge; If it be true, that the extreame Elements be
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              one ſimply grave, and the other ſimply light, and that the mean
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              Elements participate of the one, and of the other Nature; but the
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              Air more of Levity, and the water more of Gravity, then there ſhall
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              be a great Maſs of Air, whoſe Gravity ſhall exceed the Gravity of a
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              little quantity of water; and therefore ſuch a Maſs of Air ſhall
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              ſcend more ſwiftly than that little water: But that is never ſeen to
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              occurr: Therefore its not true, that the mean Elements do
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              pate of the one, and the other quality. </s>
              <s>This argument is fallacious,
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              no leſs than the other againſt
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              Democritus.
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              </s>
            </p>
            <p type="main">
              <s>Laſtly,
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              Aristotle
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              having ſaid, that if the Poſition of
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              Democritus
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              were true, it would follow, that a great Maſs of Air ſhould move
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              more ſwiftly than a ſmall Maſs of water, and afterwards ſubjoyned,
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              that that is never ſeen in any Caſe: methinks others may become
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              ſirous to know of him in what place this ſhould evene, which he
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              duceth againſt
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              Democritus,
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              and what Experiment teacheth us, that
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              it never falls out ſo. </s>
              <s>To ſuppoſe to ſee it in the Element of water,
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              or in that of the Air is vain, becauſe neither doth water through
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              water, nor Air through Air move, nor would they ever by any
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              whatever participation others aſſign them, of Earth or of Fire: the
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              Earth, in that it is not a Body fluid, and yielding to the mobility of
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              other Bodies, is a moſt improper place and
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              Medium
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              for ſuch an
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              periment:
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              Vacuum,
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              according to the ſame
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              Ariſtotle
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              himſelf, there
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              is none, and were there, nothing would move in it: there remaine
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              the Region of Fire, but being ſo far diſtant from us, what
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              ment can aſſure us, or hath aſſertained
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              Ariſtotle
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              in ſuch ſort, that he
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              ſhould as of a thing moſt obvious to ſence, affirm what he
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              ceth in confutation of
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              Democritus,
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              to wit, that a great Maſs of Air,
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              is moved no ſwifter than a little one of water? </s>
              <s>But I will dwell no
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              longer upon this matter, whereon I have ſpoke ſufficiently: but
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              leaving
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              Democritus,
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              I return to the Text of
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              Ariſtotle,
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              wherein he
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              goes about to render the true reaſon, how it comes to paſs, that the
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              thin Plates of Iron or Lead do ſwim on the water; and, moreover,
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              that Gold it ſelf being beaten into thin Leaves, not only ſwims in
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              water, but flyeth too and again in the Air. </s>
              <s>He ſuppoſeth that of
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              Continualls, ſome are eaſily diviſible, others not: and that of the
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              eaſily diviſible, ſome are more ſo, and ſome leſs: and theſe he
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              affirms we ſhould eſteem the Cauſes. </s>
              <s>He addes that that is eaſily
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              diviſible, which is well terminated, and the more the more diviſible,
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              and that the Air is more ſo, than the water, and the water than the
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              Earth. </s>
              <s>And, laſtly, he ſuppoſeth that in each kind, the leſſe
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              tity is eaſlyer divided and broken than the greater.</s>
            </p>
          </chap>
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