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

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    <archimedes>
      <text>
        <front>
          <section>
            <pb pagenum="401"/>
            <p type="head">
              <s>A DISCOVRSE
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              Preſented to the Moſt Serene DON COSIMO II.
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              GREATDUKE of
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              TUSC ANY:
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              CONCERNING
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                <emph type="italics"/>
              The Natation of BODIES Upon, or Submerſion
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              In, the WATER.
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              </s>
            </p>
          </section>
        </front>
        <body>
          <chap>
            <p type="main">
              <s>Conſidering (Moſt Serene Prince) that the
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              publiſhing this preſent Treatiſe, of ſo
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              different an Argument from that which
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                <arrow.to.target n="marg1393"/>
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              many expect, and which according to the
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              intentions I propoſed in my ^{*} Aſtronomi­
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              call
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              Adviſo,
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              I ſhould before this time
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              have put forth, might peradventure make
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              ſome thinke, either that I had wholly
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              relinquiſhed my farther imployment
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              about the new Celeſtiall Obſervations,
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              or that, at leaſt, I handled them very
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              remiſſely; I have judged fit to render an account, aſwell of my
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              deferring that, as of my writing, and publiſhing this treatiſe.</s>
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            <p type="margin">
              <s>
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              His Nuncio Sl­
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              derio.</s>
            </p>
            <p type="main">
              <s>As to the firſt, the laſt diſcoveries of
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              Saturn
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              to be tricorporeall, and
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              of the mutations of Figure in
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              Venus,
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              like to thoſe that are ſeen in the
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              Moon, together with the Conſequents depending thereupon, have
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              not ſo much occaſioned the demur, as the inveſtigation of the times
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              of the Converſions of each of the Four Medicean Planets about
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              Ju­
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              piter,
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              which I lighted upon in
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              April
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              the year paſt, 1611, at my being in
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              Rome
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              ; where, in the end, I aſſertained my ſelfe, that the firſt and neereſt
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              to
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              Jupiter,
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              moved about 8
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              gr.
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              & 29
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              m.
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              of its Sphere in an houre, make­
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              ing its whole revolution in one naturall day, and 18 hours, and almoſt
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              an halfe. </s>
              <s>The ſecond moves in its Orbe 14
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              gr. </s>
              <s>13 min.
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              or very neer,
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              in an hour, and its compleat converſion is conſummate in 3 dayes, 13
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              hours, and one third, or thereabouts. </s>
              <s>The third paſſeth in an hour,
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              2
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              gr. </s>
              <s>6 min.
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              little more or leſs of its Circle, and meaſures it all in 7
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              dayes, 4 hours, or very neer. </s>
              <s>The fourth, and more remote than the
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              reſt, goes in one houre, o
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              gr 54 min.
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              and almoſt an halfe of its Sphere,
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              and finiſheth it all in 16 dayes, and very neer 18 hours. </s>
              <s>But be­
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              cauſe the exceſſive velocity of their returns or reſtitutions, requires a
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              moſt ſcrupulous preciſeneſſe to calculate their places, in times paſt </s>
            </p>
          </chap>
        </body>
      </text>
    </archimedes>