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

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              <s>
                <pb pagenum="430"/>
              impreſs the Figures for cutting or penetrating this or that Body,
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              as the ſolidity or obdurateneſs of the ſaid Bodies ſhall be greater
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              or leſs, is very neceſſary: but withall I ſubjoyn, that ſuch
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              ion, election and caution would be ſuperfluous and unprofitable, if
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              the Body to be cut or penetrated, ſhould have no Reſiſtance, or
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              ſhould not at all withſtand the Cutting or Penitration: and if the
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              Knife were to be uſed in cutting a Miſt or Smoak, one of Paper
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              would be equally ſerviceable with one of
                <emph type="italics"/>
              Damaſcus
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              Steel: and ſo
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              by reaſon the water hath not any Reſiſtance againſt the Penitration
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              of any Solid Body, all choice of Matter is ſuperfluous and needleſs,
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              and the Election which I ſaid above to have been well made of a
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              Matter reciprocall in Gravity to water, was not becauſe it was
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              ceſſary, for the overcoming of the craſſiitude of the water, but its
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              Gravity, with which only it reſiſts the ſinking of Solid Bodies: and
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              for what concerneth the Reſiſtance of the craſſitude, if we narrowly
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              conſider it, we ſhall find that all Solid Bodies, as well thoſe that
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              ſink, as thoſe that ſwim, are indifferently accomodated and apt to
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              bring us to the knowledge of the truth in queſtion. </s>
              <s>Nor will I
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              be frighted out of the belief of theſe Concluſions, by the
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              ments which may be produced againſt me, of many ſeverall Woods,
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              Corks, Galls, and, moreover, of ſubtle ſlates and plates of all ſorts
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              of Stone and Mettall, apt by means of their Naturall Gravity, to
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              move towards the Centre of the Earth, the which, nevertheleſs,
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              ing impotent, either through the Figure (as the Adverſaries thinke)
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              or through Levity, to break and penetrate the Continuity of the
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              parts of the water, and to diſtract its union, do continue to ſwimm
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              without ſubmerging in the leaſt: nor on the other ſide, ſhall the
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              Authority of
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              Ariſtotle
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              move me, who in more than one place,
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              meth the contrary to this, which Experience ſhews me.</s>
            </p>
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              <s>
                <arrow.to.target n="marg1463"/>
              </s>
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            <p type="margin">
              <s>
                <margin.target id="marg1463"/>
              No Solid of
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              ſuch Levity, nor
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              of ſuch Figure,
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              but that it doth
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              penetrate the
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              Craſſitude of
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              the Water.</s>
            </p>
            <p type="main">
              <s>I return, therefore, to aſſert, that there is not any Solid of ſuch
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              Levity, nor of ſuch Figure, that being put upon the water, doth not
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              divide and penetrate its Craſſitude: yea if any with a more
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              ſpicatious eye, ſhall return to obſerve more exactly the thin Boards
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              of Wood, he ſhall ſee them to be with part of their thickneſs under </s>
            </p>
            <p type="main">
              <s>
                <arrow.to.target n="marg1464"/>
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              water, and not only with their inferiour Superficies, to kiſſe the
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              Superiour of the water, as they of neceſſity muſt have believed, who
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              have ſaid, that ſuch Boards ſubmerge not, as not being able to
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              vide the Tenacity of the parts of the water: and, moreover, he
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              ſhall ſee, that ſubtle ſhivers of Ebony, Stone or Metall, when they
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              float, have not only broak the Continuity of the water, but are with
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              all their thickneſs, under the Surface of it; and more and more,
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              according as the Matters are more grave: ſo that a thin Plate of
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              Lead, ſhall be lower than the Surface of the circumfuſed water, by
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              at leaſt twelve times the thickneſs of the Plate, and Gold ſhall dive </s>
            </p>
          </chap>
        </body>
      </text>
    </archimedes>
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