Salusbury, Thomas, Mathematical collections and translations (Tome I), 1667

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            <pb xlink:href="040/01/135.jpg" pagenum="117"/>
            <p type="main">
              <s>SIMPL. </s>
              <s>It may, in caſe the Ship were incorruptible, but the
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              Ship decaying, the Navigation muſt of neceſſity come to an end.</s>
            </p>
            <p type="main">
              <s>SALV. </s>
              <s>But in the Mediterrane, though the Veſſel were
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              ruptible, yet could ſhe not ſail perpetually towards
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              Paleſtina,
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              that
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                <arrow.to.target n="marg299"/>
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              Voyage being determined. </s>
              <s>Two things then are required, to the
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              end a moveable may without intermiſſion move perpetually; the
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              one is, that the motion may of its own nature be indeterminate and
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              infinite; the other, that the moveable be likewiſe incorruptible
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              and eternal.</s>
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            <p type="margin">
              <s>
                <margin.target id="marg299"/>
                <emph type="italics"/>
              Two things
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              quiſite to the end a
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              motion may
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              petuate it ſelf; an
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              unlimited ſpace,
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              and an
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              ble moveable.
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              </s>
            </p>
            <p type="main">
              <s>SIMPL. </s>
              <s>All this is neceſſary.</s>
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            <p type="main">
              <s>SALV. </s>
              <s>Therefore you may ſee how of your own accord you
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              have confeſſed it impoſſible that any moveable ſhould move
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              nally in a right line, in regard that right motion, whether it be
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                <arrow.to.target n="marg300"/>
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              wards, or downwards, is by you your ſelf bounded by the
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              ference and centre; ſo that if a Moveable, as ſuppoſe the Earth
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              be eternal, yet foraſmuch as the right motion is not of its own
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              ture eternall, but moſt ^{*}terminate, it cannot naturally ſuit with
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                <arrow.to.target n="marg301"/>
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              the Earth. </s>
              <s>Nay, as was ſaid ^{*} yeſterday,
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              Ariſtotle
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              himſelf is
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                <arrow.to.target n="marg302"/>
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              conſtrained to make the Terreſtrial Globe eternally immoveable.
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              </s>
              <s>When again you ſay, that the parts of the Earth evermore move
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              downwards, all impediments being removed, you egregiouſly
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              vocate; for then, on the other ſide they muſt be impeded,
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              ried, and forced, if you would have them move; for, when they
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              are once fallen to the ground, they muſt be violently thrown
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              wards, that they may a ſecond time fall; and as to the
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              ments, theſe only hinder its arrival at the centre; but if there were
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              a
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              Well,
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              that did paſſe thorow and beyond the centre, yet would not
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              a clod of Earth paſſe beyond it, unleſſe inaſmuch as being
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              ported by its
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              impetus,
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              it ſhould paſſe the ſame to return thither
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              gain, and in the end there to reſt. </s>
              <s>As therefore to the defending,
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              that the motion by a right line doth or can agree naturally neither
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              to the Earth, nor to any other moveable, whil'ſt the Univerſe
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              taineth its perfect order, I would have you take no further paines
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              bout it, but (unleſſe you will grant them the circular motion)
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              your beſt way will be to defend and maintain their immobility.</s>
            </p>
            <p type="margin">
              <s>
                <margin.target id="marg300"/>
                <emph type="italics"/>
              Right motion
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              cannot be eternal,
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              and conſequently
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              cannot be natural
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              to the Earth.
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              </s>
            </p>
            <p type="margin">
              <s>
                <margin.target id="marg301"/>
              * Terminatiſſimo.</s>
            </p>
            <p type="margin">
              <s>
                <margin.target id="marg302"/>
              * By this
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              on he every where
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              means the
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              ding Dialogue, or
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                <emph type="italics"/>
              Giornata.
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              </s>
            </p>
            <p type="main">
              <s>SIMPL. </s>
              <s>As to their immoveableneſſe, the arguments of
                <emph type="italics"/>
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              ſtotle,
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              and moreover thoſe alledged by your ſelf ſeem in my
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              on neceſſarily to conclude the ſame, as yet; and I conceive it will
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              be a hard matter to refute them.</s>
            </p>
            <p type="main">
              <s>SALV. </s>
              <s>Come we therefore to the ſecond Argument, which was,
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              That thoſe bodies, which we are aſſured do move circularly, have
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                <arrow.to.target n="marg303"/>
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              more than one motion, unleſſe it be the
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              Primum Mobile
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              ; and
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              therefore, if the Earth did move circularly, it ought to have two
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              motions; from which alterations would follow in the riſing and
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              ſetting of the Fixed Stars: Which effect is not perceived to enſue. </s>
            </p>
          </chap>
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