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

Table of figures

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            <p type="main">
              <s>
                <pb pagenum="444"/>
                <emph type="italics"/>
              all that, to be still the ſame: Moreover, that Hair which draws
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              Beam through the Water, is likewiſe to divide the upperparts, and
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              alſo to begin the Motion, and yet it begins it, and yet it divides it: and
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              finally, let the Board of Ebony be put in the midway, betwixt the bottome
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              and the top of the Water, and let it there for a while be ſuſpended and
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              ſetled, and afterwards let it be left at liberty, and it will instantly begin
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              its Motion, and will continue it unto the bottome. </s>
              <s>Nay, more, the Board
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              ſo ſoon as it is dimitted upon the Water, hath not only begun to
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              and divide it, but is for a good ſpace dimerged into it.
                <emph.end type="italics"/>
              </s>
            </p>
            <p type="margin">
              <s>
                <margin.target id="marg1494"/>
              The parts of
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              Liquids, ſo farte
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              from reſiſting
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              Diviſion, that
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              they contain not
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              any thing that
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              may be divided.</s>
            </p>
            <p type="margin">
              <s>
                <margin.target id="marg1495"/>
              The
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              ance a Solid
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              findeth in
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              ving through
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              the water, like
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              to that we meet
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              with in paſſing
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              through a
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              throng of
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              ple;</s>
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            <p type="margin">
              <s>
                <margin.target id="marg1496"/>
              Or in
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              ing a Stick into
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              an heap of Sand.</s>
            </p>
            <p type="margin">
              <s>
                <margin.target id="marg1497"/>
              Two kinds of
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              Penetration, one
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              in Bodies
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              nuall, the other
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              in Bodies only
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              contiguous.</s>
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            <p type="margin">
              <s>
                <margin.target id="marg1498"/>
              Water conſiſts
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              not of
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              all, but only
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              of contiguous
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              parts.</s>
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            <p type="margin">
              <s>
                <margin.target id="marg1499"/>
                <emph type="italics"/>
              Set what
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              faction he hath
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              given, as to this
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              point, in Lib. de
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              Motu. </s>
              <s>Dial.
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              2.</s>
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            <p type="margin">
              <s>
                <margin.target id="marg1500"/>
              Great
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              ence betwixt the
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              Conjunction of
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              the parts of a
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              dy when Solid,
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              and when fluid.</s>
            </p>
            <p type="margin">
              <s>
                <margin.target id="marg1501"/>
              Water conſiſts
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              of parts that
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              mit of no
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              ther diviſion.</s>
            </p>
            <p type="margin">
              <s>
                <margin.target id="marg1502"/>
              Solids
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              ted into the
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              ter, do onely
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              move, and not
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              divide it.</s>
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            <p type="margin">
              <s>
                <margin.target id="marg1503"/>
              If there were
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              any Reſiſtance
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              of Diviſion in
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              water, it muſt
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              needs be ſmall,
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              in that it is
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              come by an
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              Hair, a Grain of
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              Lead, or a ſlight
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              bathing of the
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              Solid.</s>
            </p>
            <p type="margin">
              <s>
                <margin.target id="marg1504"/>
              The uper parts
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              of the Water, do
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              no more reſiſt
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              Diviſion, than
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              the middle or
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              loweſt parts.</s>
            </p>
            <p type="margin">
              <s>
                <margin.target id="marg1505"/>
              Waters
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              ſiſtance of
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              ſion, not greater
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              in the
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              ning of the
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              merſion.</s>
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            <p type="main">
              <s>Let us receive it, therefore, for a true and undoubted
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              on, That the Water hath not any Renitence againſt ſimple
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              on, and that it is not poſſible to find any Solid Body, be it of what
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              Figure it will, which being put into the Water, its Motion upwards
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              or downwards, according as it exceedeth, or ſhall be exceeded by
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              the Water in Gravity (although ſuch exceſſe and difference be
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              ſenſible) ſhall be prohibited, and taken away, by the Craſſitude of
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              the ſaid Water. </s>
              <s>When, therefore, we ſee the Board of Ebony, or
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              of other Matter, more grave than the Water, to ſtay in the
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              fines of the Water and Air, without ſubmerging, we muſt have
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              courſe to ſome other Originall, for the inveſting the Cauſe of
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              Effect, than to the breadth of the Figure, unable to overcome
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              Renitence with which the Water oppoſeth Diviſion, ſince there is
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              no Reſiſtance; and from that which is not in being, we can
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              no Action. </s>
              <s>It remains moſt true, therefore, as we have ſaid before,
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              this ſo ſucceds, for that that which in ſuch manner put upon the
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              ter, not the ſame Body with that which is put
                <emph type="italics"/>
              into
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              the Water:
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              this which is put
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              into
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              the Water, is the pure Board of Ebony, which
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              for that it is more grave than the Water, ſinketh, and that which is
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              put
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              upon
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              the Water, is a Compoſition of Ebony, and of ſo much
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              Air, that both together are ſpecifically leſs grave than the
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              and therefore they do not deſcend.</s>
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            <p type="main">
              <s>I will farther confirm this which I ſay. </s>
              <s>Gentlemen, my
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              niſts, we are agreed, that the exceſs or defect of the Gravity of the
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              Solid, unto the Gravity of the Water, is the true and proper
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              of Natation or
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                <arrow.to.target n="marg1506"/>
              </s>
            </p>
            <p type="margin">
              <s>
                <margin.target id="marg1506"/>
              Great Caution
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              to be had in
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              perimenting the
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              operation of
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              gure in
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              on.</s>
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            <p type="main">
              <s>Now, if you will ſhew that beſides the former Cauſe, there is
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              ther which is ſo powerfull, that it can hinder and remove the
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              merſion of thoſe very Solids, that by their Gravity ſink, and if
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              will ſay, that this is the breadth or ampleneſs of Figure, you are
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              lieged, when ever you would ſhew ſuch an Experiment, firſt to make
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              the circumſtances certain, that that Solid which you put into the
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              Water, be not leſs grave
                <emph type="italics"/>
              in ſpecie
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              than it, for if you ſhould not do ſo
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              any one might with reaſon ſay, that not the Figure, but the
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              was the cauſe of that Natation. </s>
              <s>But I ſay, that when you ſhall </s>
            </p>
          </chap>
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