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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              <pb o="131" file="0311" n="311" rhead="That the Earth may be a Planet."/>
            ſuch thing as a right Motion, whether of Aſ-
              <lb/>
            cent or Deſcent, in a ſtreight Line.</s>
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          </p>
          <div type="float" level="2" n="11">
            <note position="left" xlink:label="note-0310-01" xlink:href="note-0310-01a" xml:space="preserve">Object.</note>
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          <p>
            <s xml:space="preserve">I anſwer: </s>
            <s xml:space="preserve">The moving of heavy or light
              <lb/>
              <anchor type="note" xlink:label="note-0311-01a" xlink:href="note-0311-01"/>
            Bodies, may be conſidered in a double rela-
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            tion.</s>
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          </p>
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            <note position="right" xlink:label="note-0311-01" xlink:href="note-0311-01a" xml:space="preserve">Sol.</note>
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          <p>
            <s xml:space="preserve">1. </s>
            <s xml:space="preserve">According to the ſpace wherein they
              <lb/>
            move, and then we grant their Motions not
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            to be ſimple, but mixed of a direct and cir-
              <lb/>
            cular.</s>
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          </p>
          <p>
            <s xml:space="preserve">2. </s>
            <s xml:space="preserve">According to the Body or medium
              <lb/>
            wherein they move, and then they may pro-
              <lb/>
            perly be ſaid to have right motions, becauſe
              <lb/>
            they paſs through the medium in a ſtreight
              <lb/>
            Line; </s>
            <s xml:space="preserve">and therefore it is, that unto us they
              <lb/>
            ſeem directly to aſcend or deſcend. </s>
            <s xml:space="preserve">Ariſto-
              <lb/>
            tle himſelf would not deny, but that Fire
              <lb/>
            may aſcend in a ſtreight Line unto its Sphere,
              <lb/>
            and yet participate alſo of that Circular
              <lb/>
            Motion which he ſuppoſes to be communica-
              <lb/>
            ted from the Heavens, unto the upper part
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            of the Air, and its own Region. </s>
            <s xml:space="preserve">So like-
              <lb/>
            wiſe muſt it be for the deſcent of any thing.
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            </s>
            <s xml:space="preserve">Suppoſe a Ship in its ſwifteſt motion, and a
              <lb/>
            Man in it, having ſome Veſſel filled with Wa-
              <lb/>
            ter, ſhould let fall into it a little Ball of
              <lb/>
            Wax, or ſome other matter which may be
              <lb/>
            ſlow in its ſinking, ſo that in one minute it
              <lb/>
            ſhould ſcarce deſcend the ſpace of a Cubit,
              <lb/>
            though the Ship (it may be) in the ſame
              <lb/>
            time may paſs at leaſt a hundred Cubits; </s>
            <s xml:space="preserve">
              <lb/>
            yet would this ſtill ſeem unto the eye to de-
              <lb/>
            ſcend in a ſtreight Line; </s>
            <s xml:space="preserve">and the other mo-
              <lb/>
            tion, which is communicated unto it by the
              <lb/>
            Ship, would not at all be diſcernable to it.</s>
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