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

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            <p type="main">
              <s>
                <pb pagenum="443"/>
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              diviſions, they cannot receive them, but only from acuter Diviſors than
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              Fire; but a Stick or Rod of Iron, moved in the melted Met all, is not
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              ſuch a one. </s>
              <s>Of a like Conſtitution and Conſiſtence, I account the parts
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              of Water, and other Liquids to be, namely, incapable of Diviſion by
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              reaſon of their Temtity; or if not abſolutely indiviſible, yet at leaſt
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              not to be divided by a Board, or other Solid Body, palpable unto the
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              band, the Sector being alwayes required to be more ſharp than the Solid
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              to be cut. </s>
              <s>Solid Bodies, therefore, do only move, and not divide the
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                <arrow.to.target n="marg1502"/>
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                <emph type="italics"/>
              Water, when put into it; whoſe parts being before divided to the
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              treameſt minuity, and therefore capable of being moved, either many of
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              them at once, or few, or very few, they ſoon give place to every ſmall
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              puſcle, that deſcends in the ſame: for that, it being little and light,
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              ſcending in the Air, and arriving to the Surface of the Water, it meets
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              with Particles of Water more ſmall, and of leſs Reſiſtance againſt
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              Motion and Extruſion, than is its own prement and extruſive force,
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              whereupon it ſubmergeth, and moveth ſuch a portion of them, as is
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              portionate to its Power. </s>
              <s>There is not, therefore, any Reſiſtance in
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              Water againſt Diviſion, nay, there is not in it any diviſible parts. </s>
              <s>I
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              adde, moreover, that in caſe yet there ſbould be any ſmall Reſiſtance
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                <emph type="italics"/>
              found (which is abſolutely falſe) haply in attempting with an Hair to
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              move a very great natant Machine, or in eſſaying by the addition of one
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              ſmall Grain of Lead to ſink, or by removall of it to raiſe a very broad
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              Plate of Matter, equall in Gravity with Water, (which likewiſe will
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              not happen, in caſe we proceed with dexterity) we may obſerve that that
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              Reſiſtance is a very different thing from that which the Adverſaries
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              duce for the Cauſe of the Natation of the Plate of Lead or Board of
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              ny, for that one may make a Board of Ebony, which being put upon the
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              Water ſwimmeth, and cannot be ſubmerged, no not by the addition of an
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              bundred Grains of Lead put upon the ſame, and afterwards being
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              thed, not only ſinks, though the ſaid Lead be taken away, but though
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              moreover a quantity of Cork, or of ſome other light Body faſtened to it,
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              ſufficeth not to hinder it from ſinking unto the bottome: ſo that you
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              ſee, that although it were granted that there is a certain ſmall
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              ance of Diviſion found in the ſubstance of the Water, yet this hath
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              thing to do with that Cauſe which ſupports the Board above the Water,
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              with a Reſiſtance an hundred times greater than that which men can
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              find in the parts of the Water: nor let them tell me, that only the Sur-
                <emph.end type="italics"/>
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                <emph type="italics"/>
              face of the Water hath ſuch Reſiſtance, and not the internall parts, or
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              that ſuch Reſiſtance is found greateſt in the beginning of the Submerſion,
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              as it alſo ſeems that in the beginning, Motion meets with greater
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              on, than in the continuance of it; becauſe, firſt, I will permit, that the
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                <emph type="italics"/>
              Water be ſtirred, and that the ſuperiour parts be mingled with the
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              dle, and inferiour parts, or that thoſe above be wholly removed, and
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              thoſe in the middle only made uſe off, and yet you ſhall ſee the effect for
                <emph.end type="italics"/>
              </s>
            </p>
          </chap>
        </body>
      </text>
    </archimedes>
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