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

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              <s>
                <pb pagenum="470"/>
              wiſe intrinſecall, whereby ſome of thoſe Bodies have an
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              Impetus
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              of
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                <arrow.to.target n="marg1538"/>
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              flying the Centre, and moving upwards: by Vertue of which
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              trinſe call Principle, called by him Levity, the Moveables which have
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              that ſame Motion more eaſily penetrate the more ſubtle
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              Medium,
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              than the more denſe: but ſuch a Propoſition appears likewiſe
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              certain, as I have above hinted in part, and as with Reaſons and
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              Experiments, I could demonſtrate, did not the preſent Argument
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              portune me, or could I diſpatch it in few words.</s>
            </p>
            <p type="margin">
              <s>
                <margin.target id="marg1538"/>
              Lib. 4. Cap. 5.</s>
            </p>
            <p type="main">
              <s>The Objection therefore of
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              Ariſtotle
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              againſt
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              Democritus,
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              whilſt
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              he ſaith, that if the Fiery aſcending Atomes ſhould ſuſtain Bodies
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              grave, but of a diſtended Figure, it would be more obſervable in
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              the Air than in the water, becauſe ſuch Corpuſcles move ſwifter in
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              that, than in this, is not good; yea the contrary would evene, for
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              that they aſcend more ſlowly through the Air: and, beſides their
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              moving ſlowly, they aſcend, not united together, as in the water,
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              but diſcontinue, and, as we ſay, ſcatter: And, therefore, as
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                <emph type="italics"/>
              Democritus
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              well replyes, reſolving the inſtance they make not their
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              puſh or
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              Impetus
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              conjunctly.</s>
            </p>
            <p type="main">
              <s>
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              Ariſtotle,
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              in the ſecond place, deceives himſelf, whilſt he will
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              have the ſaid grave Bodies to be more eaſily ſuſtained by the ſaid
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              Fiery aſcending Atomes in the Air than in the Water: not
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              ing, that the ſaid Bodies are much more grave in that, than in this,
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              and that ſuch a Body weighs ten pounds in the Air, which will not
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              in the water weigh 1/2 an ounce; how can it then be more eaſily
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              ſuſtained in the Air, than in the Water?</s>
            </p>
            <p type="main">
              <s>Let us conclude, therefore, that
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              Democritus
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              hath in this particular
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              better Philoſophated than
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              Ariſtotle.
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              But yet will not I affirm, that
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              De-
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                <emph type="italics"/>
              mocritus
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              hath reaſon'd rightly, but I rather ſay, that there is a
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              nifeſt Experiment that overthrows his Reaſon, and this it is, That
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              if it were true, that calid aſcending Atomes ſhould uphold a Body,
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              that if they did not hinder, would go to the bottom, it would follow,
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              that we may find a Matter very little ſuperiour in Gravity to the
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              water, the which being reduced into a Ball, or other contracted
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              Figure, ſhould go to the bottom, as encountring but few Fiery
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              tomes; and which being diſtended afterwards into a dilated and
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              thin Plate, ſhould come to be thruſt upwards by the impulſion of a
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              great Multitude of thoſe Corpuſcles, and at laſt carried to the very
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              Surface of the water: which wee ſee not to happen; Experience
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              ſhewing us, that a Body
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              v. </s>
              <s>gra.
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              of a Sphericall Figure, which very
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              hardly, and with very great leaſure goeth to the bottom, will reſt
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              there, and will alſo deſcend thither, being reduced into whatſoever
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              other diſtended Figure. </s>
              <s>We muſt needs ſay then, either that in the
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              water, there are no ſuch aſcending Fiery Atoms, or if that ſuch there
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              be, that they are not able to raiſe and lift up any Plate of a Matter, </s>
            </p>
          </chap>
        </body>
      </text>
    </archimedes>
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