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="129" file="0309" n="309" rhead="That the Earth may be a Planet."/>
            non will be transferred to the ſcituation D
              <lb/>
            E, ſo that the Bullet muſt be moved ac-
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            cording to the Line FG, which is not di-
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            rectly upright, but ſomewhat declining.
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            </s>
            <s xml:space="preserve">Now, the motion of the Bullet in the Air,
              <lb/>
            muſt neceſſarily be conformed unto that di-
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            rection that is impreſſed in it by the Cannon
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            from whence it is ſhot, and ſo conſequently
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            it muſt be continued, according to the Line
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            F G, and therefore will always keep per-
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            pendicularly over the Point from which it
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            did aſcend.</s>
            <s xml:space="preserve"/>
          </p>
          <p>
            <s xml:space="preserve">If you reply, That the motion of the
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            Bullet in the Cannon, muſt needs be ſo
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            ſwift, that the Earth cannot carry the Can-
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            non from C to E, in the ſame ſpace of time
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            wherein the Bullet does move from B to A.</s>
            <s xml:space="preserve"/>
          </p>
          <p>
            <s xml:space="preserve">I anſwer: </s>
            <s xml:space="preserve">’Tis not material whether the
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            Earth be of a greater or le@er ſwiftneſs than
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            the Bullet, becauſe the Declination muſt al-
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            ways be proportionable to the motion of
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            the Earth; </s>
            <s xml:space="preserve">and if we ſuppoſe this to be
              <lb/>
            ſlower than the Bullet, then the Declina-
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            tion of the Line F G, will be ſo much the
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            leſs.</s>
            <s xml:space="preserve"/>
          </p>
          <p>
            <s xml:space="preserve">This Truth may yet further be illuſtrated
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            by the practice of thoſe Fowlers, who uſe
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            to kill Birds as they are flying: </s>
            <s xml:space="preserve">Concerning
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            which Art, ’tis commonly thought, that theſe
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            Men direct their Aims to ſome certain ſpace
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            in the Air, juſt before the Birds, where they
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            conceive the Shot will meet with them in their
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            flight; </s>
            <s xml:space="preserve">whereas, the truth is, they proceed
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            in this caſe, the very ſame way as if the</s>
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