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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          <pb o="155" file="0167" n="167" rhead="That the Moon may be a World."/>
          <p>
            <s xml:id="echoid-s2301" xml:space="preserve">3. </s>
            <s xml:id="echoid-s2302" xml:space="preserve">Another way to find the height of this Va-
              <lb/>
            porous Air, is, by knowing the difſerence of
              <lb/>
            Altitude, which it cauſeth, in refracting the
              <lb/>
            Beams of any Star near the Horizon. </s>
            <s xml:id="echoid-s2303" xml:space="preserve">And from
              <lb/>
            this Obſervation alſo, it is uſually concluded to
              <lb/>
            be about two or three miles high.</s>
            <s xml:id="echoid-s2304" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s2305" xml:space="preserve">But now you muſt not conceive, as if the
              <lb/>
            Orb of Magnetical Vigor, were bounded in
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            an exact Superficies, or, as if it did equally
              <lb/>
            hold out juſt to ſuch a determinate Line, and
              <lb/>
            no further. </s>
            <s xml:id="echoid-s2306" xml:space="preserve">But as it hath been ſaid of the firſt
              <lb/>
            Region, which is there terminated, where the
              <lb/>
            Heat of Reflection does begin to Languiſh: </s>
            <s xml:id="echoid-s2307" xml:space="preserve">So
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            likewiſe is it probable, that this Magnetical
              <lb/>
            Vigor does remit of its degrees proportionably
              <lb/>
            to its diſtance from the Earth, which is the cauſe
              <lb/>
            of it: </s>
            <s xml:id="echoid-s2308" xml:space="preserve">and therefore though the thicker Clouds
              <lb/>
            may be elevated no higher, yet this Orb may
              <lb/>
            be continued in weaker degrees a little beyond
              <lb/>
            them. </s>
            <s xml:id="echoid-s2309" xml:space="preserve">We will ſuppoſe it (which in all like-
              <lb/>
            lyhood is the moſt) to be about Twenty Miles
              <lb/>
            high. </s>
            <s xml:id="echoid-s2310" xml:space="preserve">So that you ſee the former Theſis remains
              <lb/>
            probable, that if a Man could but fly, or by
              <lb/>
            any other means get Twenty Miles upwards, it
              <lb/>
            were poſſible for him to reach unto the Moon.</s>
            <s xml:id="echoid-s2311" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s2312" xml:space="preserve">But it may be again Objected: </s>
            <s xml:id="echoid-s2313" xml:space="preserve">Tho’ all this
              <lb/>
            were true; </s>
            <s xml:id="echoid-s2314" xml:space="preserve">though there were ſuch an Orb of
              <lb/>
            Air which did terminate the Earths vigour:
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            </s>
            <s xml:id="echoid-s2315" 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:id="echoid-s2316" xml:space="preserve">yet thoſe two other Impe-
              <lb/>
            diments may ſeem to deny the poſſibility of
              <lb/>
            any ſuch Voyage.</s>
            <s xml:id="echoid-s2317" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s2318" xml:space="preserve">1. </s>
            <s xml:id="echoid-s2319" xml:space="preserve">The extream coldneſs of that Air. </s>
            <s xml:id="echoid-s2320" xml:space="preserve">If ſome
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            of our higher Mountains for this reaſon be </s>
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