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

Page concordance

< >
Scan Original
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
< >
page |< < of 77 > >|
    <archimedes>
      <text>
        <body>
          <chap>
            <p type="main">
              <s>
                <pb pagenum="444"/>
                <emph type="italics"/>
              all that, to be still the ſame: Moreover, that Hair which draws
                <lb/>
              Beam through the Water, is likewiſe to divide the upperparts, and
                <lb/>
              alſo to begin the Motion, and yet it begins it, and yet it divides it: and
                <lb/>
              finally, let the Board of Ebony be put in the midway, betwixt the bottome
                <lb/>
              and the top of the Water, and let it there for a while be ſuſpended and
                <lb/>
              ſetled, and afterwards let it be left at liberty, and it will instantly begin
                <lb/>
              its Motion, and will continue it unto the bottome. </s>
              <s>Nay, more, the Board
                <lb/>
              ſo ſoon as it is dimitted upon the Water, hath not only begun to
                <lb/>
              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
                <lb/>
              Liquids, ſo farte
                <lb/>
              from reſiſting
                <lb/>
              Diviſion, that
                <lb/>
              they contain not
                <lb/>
              any thing that
                <lb/>
              may be divided.</s>
            </p>
            <p type="margin">
              <s>
                <margin.target id="marg1495"/>
              The
                <lb/>
              ance a Solid
                <lb/>
              findeth in
                <lb/>
              ving through
                <lb/>
              the water, like
                <lb/>
              to that we meet
                <lb/>
              with in paſſing
                <lb/>
              through a
                <lb/>
              throng of
                <lb/>
              ple;</s>
            </p>
            <p type="margin">
              <s>
                <margin.target id="marg1496"/>
              Or in
                <lb/>
              ing a Stick into
                <lb/>
              an heap of Sand.</s>
            </p>
            <p type="margin">
              <s>
                <margin.target id="marg1497"/>
              Two kinds of
                <lb/>
              Penetration, one
                <lb/>
              in Bodies
                <lb/>
              nuall, the other
                <lb/>
              in Bodies only
                <lb/>
              contiguous.</s>
            </p>
            <p type="margin">
              <s>
                <margin.target id="marg1498"/>
              Water conſiſts
                <lb/>
              not of
                <lb/>
              all, but only
                <lb/>
              of contiguous
                <lb/>
              parts.</s>
            </p>
            <p type="margin">
              <s>
                <margin.target id="marg1499"/>
                <emph type="italics"/>
              Set what
                <lb/>
              faction he hath
                <lb/>
              given, as to this
                <lb/>
              point, in Lib. de
                <lb/>
              Motu. </s>
              <s>Dial.
                <emph.end type="italics"/>
              2.</s>
            </p>
            <p type="margin">
              <s>
                <margin.target id="marg1500"/>
              Great
                <lb/>
              ence betwixt the
                <lb/>
              Conjunction of
                <lb/>
              the parts of a
                <lb/>
              dy when Solid,
                <lb/>
              and when fluid.</s>
            </p>
            <p type="margin">
              <s>
                <margin.target id="marg1501"/>
              Water conſiſts
                <lb/>
              of parts that
                <lb/>
              mit of no
                <lb/>
              ther diviſion.</s>
            </p>
            <p type="margin">
              <s>
                <margin.target id="marg1502"/>
              Solids
                <lb/>
              ted into the
                <lb/>
              ter, do onely
                <lb/>
              move, and not
                <lb/>
              divide it.</s>
            </p>
            <p type="margin">
              <s>
                <margin.target id="marg1503"/>
              If there were
                <lb/>
              any Reſiſtance
                <lb/>
              of Diviſion in
                <lb/>
              water, it muſt
                <lb/>
              needs be ſmall,
                <lb/>
              in that it is
                <lb/>
              come by an
                <lb/>
              Hair, a Grain of
                <lb/>
              Lead, or a ſlight
                <lb/>
              bathing of the
                <lb/>
              Solid.</s>
            </p>
            <p type="margin">
              <s>
                <margin.target id="marg1504"/>
              The uper parts
                <lb/>
              of the Water, do
                <lb/>
              no more reſiſt
                <lb/>
              Diviſion, than
                <lb/>
              the middle or
                <lb/>
              loweſt parts.</s>
            </p>
            <p type="margin">
              <s>
                <margin.target id="marg1505"/>
              Waters
                <lb/>
              ſiſtance of
                <lb/>
              ſion, not greater
                <lb/>
              in the
                <lb/>
              ning of the
                <lb/>
              merſion.</s>
            </p>
            <p type="main">
              <s>Let us receive it, therefore, for a true and undoubted
                <lb/>
              on, That the Water hath not any Renitence againſt ſimple
                <lb/>
              on, and that it is not poſſible to find any Solid Body, be it of what
                <lb/>
              Figure it will, which being put into the Water, its Motion upwards
                <lb/>
              or downwards, according as it exceedeth, or ſhall be exceeded by
                <lb/>
              the Water in Gravity (although ſuch exceſſe and difference be
                <lb/>
              ſenſible) ſhall be prohibited, and taken away, by the Craſſitude of
                <lb/>
              the ſaid Water. </s>
              <s>When, therefore, we ſee the Board of Ebony, or
                <lb/>
              of other Matter, more grave than the Water, to ſtay in the
                <lb/>
              fines of the Water and Air, without ſubmerging, we muſt have
                <lb/>
              courſe to ſome other Originall, for the inveſting the Cauſe of
                <lb/>
              Effect, than to the breadth of the Figure, unable to overcome
                <lb/>
              Renitence with which the Water oppoſeth Diviſion, ſince there is
                <lb/>
              no Reſiſtance; and from that which is not in being, we can
                <lb/>
              no Action. </s>
              <s>It remains moſt true, therefore, as we have ſaid before,
                <lb/>
              this ſo ſucceds, for that that which in ſuch manner put upon the
                <lb/>
              ter, not the ſame Body with that which is put
                <emph type="italics"/>
              into
                <emph.end type="italics"/>
              the Water:
                <lb/>
              this which is put
                <emph type="italics"/>
              into
                <emph.end type="italics"/>
              the Water, is the pure Board of Ebony, which
                <lb/>
              for that it is more grave than the Water, ſinketh, and that which is
                <lb/>
              put
                <emph type="italics"/>
              upon
                <emph.end type="italics"/>
              the Water, is a Compoſition of Ebony, and of ſo much
                <lb/>
              Air, that both together are ſpecifically leſs grave than the
                <lb/>
              and therefore they do not deſcend.</s>
            </p>
            <p type="main">
              <s>I will farther confirm this which I ſay. </s>
              <s>Gentlemen, my
                <lb/>
              niſts, we are agreed, that the exceſs or defect of the Gravity of the
                <lb/>
              Solid, unto the Gravity of the Water, is the true and proper
                <lb/>
              of Natation or
                <lb/>
                <arrow.to.target n="marg1506"/>
              </s>
            </p>
            <p type="margin">
              <s>
                <margin.target id="marg1506"/>
              Great Caution
                <lb/>
              to be had in
                <lb/>
              perimenting the
                <lb/>
              operation of
                <lb/>
              gure in
                <lb/>
              on.</s>
            </p>
            <p type="main">
              <s>Now, if you will ſhew that beſides the former Cauſe, there is
                <lb/>
              ther which is ſo powerfull, that it can hinder and remove the
                <lb/>
              merſion of thoſe very Solids, that by their Gravity ſink, and if
                <lb/>
              will ſay, that this is the breadth or ampleneſs of Figure, you are
                <lb/>
              lieged, when ever you would ſhew ſuch an Experiment, firſt to make
                <lb/>
              the circumſtances certain, that that Solid which you put into the
                <lb/>
              Water, be not leſs grave
                <emph type="italics"/>
              in ſpecie
                <emph.end type="italics"/>
              than it, for if you ſhould not do ſo
                <lb/>
              any one might with reaſon ſay, that not the Figure, but the
                <lb/>
              was the cauſe of that Natation. </s>
              <s>But I ſay, that when you ſhall </s>
            </p>
          </chap>
        </body>
      </text>
    </archimedes>
Impressum