Galilei, Galileo, The systems of the world, 1661

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    <archimedes>
      <text>
        <body>
          <chap>
            <p type="main">
              <s>
                <pb xlink:href="065/01/013.jpg" pagenum="7"/>
              is its motion. </s>
              <s>Having confirmed theſe motions, he proceeds ſaying,
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              that of natural bodies ſome being ſimple, and ſome compoſed of
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              them (and he calleth ſimple bodies thoſe, that have a principle
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              of motion from nature, as the Fire and Earth) it follows that
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              ſimple motions belong to ſimple bodies, and mixt to the
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              pound; yet in ſuch ſort, that the compounded incline to the part
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              predominant in the compoſition.</s>
            </p>
            <p type="margin">
              <s>
                <margin.target id="marg16"/>
                <emph type="italics"/>
              Local motion of
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              three kinds, right,
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              circular, & mixt.
                <emph.end type="italics"/>
              </s>
            </p>
            <p type="margin">
              <s>
                <margin.target id="marg17"/>
                <emph type="italics"/>
              Circular, and
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              ſtreight motions
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              are ſimple, as
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              ceeding by ſimple
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              lines.
                <emph.end type="italics"/>
              </s>
            </p>
            <p type="margin">
              <s>
                <margin.target id="marg18"/>
                <emph type="italics"/>
              Ad medium, à
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              dio, & circa
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              um.
                <emph.end type="italics"/>
              </s>
            </p>
            <p type="main">
              <s>SAGR. </s>
              <s>Pray you hold a little
                <emph type="italics"/>
              Salviatus,
                <emph.end type="italics"/>
              for I find ſo many
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              doubts to ſpring up on all ſides in this diſcourſe, that I ſhall be
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              conſtrained, either to communicate them if I would attentively
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              hearken to what you ſhall add, or to take off my attention from
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              the things ſpoken, if I would remember objections.</s>
            </p>
            <p type="main">
              <s>SALV. </s>
              <s>I will very willingly ſtay, for that I alſo run the ſame
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              hazard, and am ready at every ſtep to loſe my ſelf whilſt I ſail
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              tween Rocks, and boiſterous Waves, that make me, as they ſay, to
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              loſe my
                <emph type="italics"/>
              Compaſs
                <emph.end type="italics"/>
              ; therefore before I make them more, propound
                <lb/>
              your
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                <arrow.to.target n="marg19"/>
              </s>
            </p>
            <p type="margin">
              <s>
                <margin.target id="marg19"/>
                <emph type="italics"/>
              The definition of
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              Nature, either
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              perfect, or
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              nable, produced by
                <emph.end type="italics"/>
                <lb/>
              Ariſtotle.</s>
            </p>
            <p type="main">
              <s>SAGR. </s>
              <s>You and
                <emph type="italics"/>
              Ariſtotle
                <emph.end type="italics"/>
              together would at firſt take me a
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              little out of the ſenſible World, to tell me of the
                <emph type="italics"/>
              Architecture,
                <emph.end type="italics"/>
                <lb/>
              wherewith it ought to be fabricated; and very appoſitly begin to
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              tell me, that a natural body is by nature moveable, nature being
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              (as elſewhere it is defined) the principle of motion. </s>
              <s>But here I
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              am ſomewhat doubtfull why
                <emph type="italics"/>
              Ariſtotle
                <emph.end type="italics"/>
              ſaid not that of natural
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              dies, ſome are moveable by nature, and others immoveable, for
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              that in the definition, nature is ſaid to be the principle of Motion,
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              and Reſt; for if natural bodies have all a principle of motion,
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              either he might have omitted the mention of Reſt, in the
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              on of nature: or not have introduced ſuch a definition in this place.
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              </s>
              <s>Next, as to the declaration of what
                <emph type="italics"/>
              Ariſtotle
                <emph.end type="italics"/>
              intends by ſimple
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              motions, and how by Spaces he determines them, calling thoſe
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              ple, that are made by ſimple lines, which are onely the right, and </s>
            </p>
            <p type="main">
              <s>
                <arrow.to.target n="marg20"/>
                <lb/>
              circular, I entertain it willingly; nor do I deſire to tenter the
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              inſtance of the Helix, about the Cylinder; which in that it is in
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              very part like to it ſelf, might ſeemingly be numbred among
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              ple lines. </s>
              <s>But herein I cannot concurre, that he ſhould ſo
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              ſtrain ſimple motions (whilſt he ſeems to go about to repeat the
                <lb/>
              ſame definition in other words) as to call one of them the motion
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              about the
                <emph type="italics"/>
              medium,
                <emph.end type="italics"/>
              the others
                <emph type="italics"/>
              Surſum & Deorſum,
                <emph.end type="italics"/>
              namely
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              wards and downward; which terms are not to be uſed, out of the
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              World fabricated, but imply it not onely made, but already
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              habited by us; for if the right motion be ſimple, by the ſimplicity
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              of the right line, and if the ſimple motion be natural, it is made on
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              every ſide, to wit, upwards, downwards, backwards, forwards, to
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              the right, to the left, and if any other way can be imagined,
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              vided it be ſtraight, it ſhall agree to any ſimple natural body; or </s>
            </p>
          </chap>
        </body>
      </text>
    </archimedes>
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