Wilkins, John, A discovery of a new world : or a discourse tending to prove, that 'tis probable there may be another Habitable World in the Moon ; with a discourse concerning the Probability of a Passage thither; unto which is added, a discourse concerning a New Planet, tending to prove, that 'tis probable our earth is one of the Planets

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That the Earth may be a Planet.
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          <p>
            <s xml:space="preserve">
              <pb o="81" file="0261" n="261" rhead="That the Earth may be a Planet."/>
            for the Earth; </s>
            <s xml:space="preserve">which by reaſon of its hea-
              <lb/>
            vineſs, is naturally unfit for motion.</s>
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          </p>
          <p>
            <s xml:space="preserve">I anſwer : </s>
            <s xml:space="preserve">This Argument likewiſe is
              <lb/>
            grounded upon theſe two ſalſe Foundations:
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            </s>
            <s xml:space="preserve">As,</s>
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          <p>
            <s xml:space="preserve">1. </s>
            <s xml:space="preserve">That the whole Frame oſ Nature does
              <lb/>
            move round, excepting only the Earth.</s>
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          </p>
          <p>
            <s xml:space="preserve">2. </s>
            <s xml:space="preserve">That the whole Earth, conſidered as
              <lb/>
            whole, and in its proper place, is heavy, or
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            more unſit for a natural motion than any of
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            the other Planets.</s>
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          <p>
            <s xml:space="preserve">Which are ſo far from being ſuch general
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            Grounds, from which Controverſies ſhould
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            be diſcuſſed, That they are the very thing
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            in queſtion betwixt us and our Adverſa-
              <lb/>
            ries.</s>
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          <p>
            <s xml:space="preserve">Arg. </s>
            <s xml:space="preserve">3. </s>
            <s xml:space="preserve">From the nature of all heavy
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            Bodies, which are to fall towards the loweſt
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            place. </s>
            <s xml:space="preserve">From whence they conclude, that our
              <lb/>
            Earth muſt be in the Centre.</s>
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          </p>
          <p>
            <s xml:space="preserve">I anſwer: </s>
            <s xml:space="preserve">This may prove it to be a Cen-
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            tre of Gravity, but not of Diſtance; </s>
            <s xml:space="preserve">or
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            that it is in the midſt of the World. </s>
            <s xml:space="preserve">Yea,
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            (but fays our Adverſaries) Ariſtotle for this
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            urges a Demonſtration, which muſt needs
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            be infallible. </s>
            <s xml:space="preserve">Thus, the motion of light
              <lb/>
            Bodies, does apparently ténd upward to-
              <lb/>
            wards the Circumference of the World :
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            </s>
            <s xml:space="preserve">but now the motion of heavy Bodies, is di-
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            rectly contrary to the aſcent of the other ; </s>
            <s xml:space="preserve">
              <lb/>
            whereſore it will neceſſarily follow, that theſe
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            do all of them tend unto the Centre of the
              <lb/>
            World.</s>
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