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 Moon may be a World.
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          <pb o="155" file="0167" n="167" rhead="That the Moon may be a World."/>
          <p>
            <s xml:space="preserve">3. </s>
            <s xml:space="preserve">Another way to find the height of this Va-
              <lb/>
            porous Air, is, by knowing the difſerence of
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            Altitude, which it cauſeth, in refracting the
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            Beams of any Star near the Horizon. </s>
            <s xml:space="preserve">And from
              <lb/>
            this Obſervation alſo, it is uſually concluded to
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            be about two or three miles high.</s>
            <s xml:space="preserve"/>
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          <p>
            <s xml:space="preserve">But now you muſt not conceive, as if the
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            Orb of Magnetical Vigor, were bounded in
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            an exact Superficies, or, as if it did equally
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            hold out juſt to ſuch a determinate Line, and
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            no further. </s>
            <s xml:space="preserve">But as it hath been ſaid of the firſt
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            Region, which is there terminated, where the
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            Heat of Reflection does begin to Languiſh: </s>
            <s xml:space="preserve">So
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            likewiſe is it probable, that this Magnetical
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            Vigor does remit of its degrees proportionably
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            to its diſtance from the Earth, which is the cauſe
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            of it: </s>
            <s xml:space="preserve">and therefore though the thicker Clouds
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            may be elevated no higher, yet this Orb may
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            be continued in weaker degrees a little beyond
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            them. </s>
            <s xml:space="preserve">We will ſuppoſe it (which in all like-
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            lyhood is the moſt) to be about Twenty Miles
              <lb/>
            high. </s>
            <s xml:space="preserve">So that you ſee the former Theſis remains
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            probable, that if a Man could but fly, or by
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            any other means get Twenty Miles upwards, it
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            were poſſible for him to reach unto the Moon.</s>
            <s xml:space="preserve"/>
          </p>
          <p>
            <s xml:space="preserve">But it may be again Objected: </s>
            <s xml:space="preserve">Tho’ all this
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            were true; </s>
            <s xml:space="preserve">though there were ſuch an Orb of
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            Air which did terminate the Earths vigour:
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            </s>
            <s xml:space="preserve">and tho’ the heavineſs of our Bodies could not
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            hinder our paſſage, through the vaſt ſpaces of
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            the Æthereal Air; </s>
            <s xml:space="preserve">yet thoſe two other Impe-
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            diments may ſeem to deny the poſſibility of
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            any ſuch Voyage.</s>
            <s xml:space="preserve"/>
          </p>
          <p>
            <s xml:space="preserve">1. </s>
            <s xml:space="preserve">The extream coldneſs of that Air. </s>
            <s xml:space="preserve">If ſome
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            of our higher Mountains for this reaſon be not</s>
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