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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          <p>
            <s xml:id="echoid-s545" xml:space="preserve">
              <pb o="34" file="0046" n="46" rhead="That the Moon may be a World."/>
            other place then wherein it is. </s>
            <s xml:id="echoid-s546" xml:space="preserve">But now this
              <lb/>
            would be ſuch an Inconvenience, as would
              <lb/>
            quite ſubvert the grounds and whole Art of
              <lb/>
            Aſtronomy, and therefore is by no means to
              <lb/>
            be admitted.</s>
            <s xml:id="echoid-s547" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s548" xml:space="preserve">Unto this it is commonly Anſwer'd, that
              <lb/>
            all thoſe Orbs are equally Diaphanus, though
              <lb/>
            not of a continued quantity. </s>
            <s xml:id="echoid-s549" xml:space="preserve">We reply, that
              <lb/>
            ſuppoſing they were, yet this cannot hinder
              <lb/>
            them from being the Cauſes of Refraction,
              <lb/>
            which is produc'd as well by the Diverſity of
              <lb/>
            Superſicies, as the different Perſpicuity of Bo-
              <lb/>
            dies. </s>
            <s xml:id="echoid-s550" xml:space="preserve">Two Glaſſes put together, will cauſe a
              <lb/>
            divers Refraction from another ſingle one,
              <lb/>
            that is but of Equal Thickneſs and Perſpicu-
              <lb/>
            ity.</s>
            <s xml:id="echoid-s551" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s552" xml:space="preserve">3. </s>
            <s xml:id="echoid-s553" xml:space="preserve">From the different Height or the ſame
              <lb/>
            Planet at ſeveral times. </s>
            <s xml:id="echoid-s554" xml:space="preserve">For if according to
              <lb/>
            the uſual Hypotheſis, there ſhould be ſuch di-
              <lb/>
            ſtinct, Solid Orbs, then it would be impoſſi-
              <lb/>
            ble that the Planets ſhould intrench upon one
              <lb/>
            anothers Orbs, or that two of them at ſeveral
              <lb/>
            Times ſhould be above one another, which
              <lb/>
            notwithſtanding hath been prov'd to be ſo by
              <lb/>
            later Experience. </s>
            <s xml:id="echoid-s555" xml:space="preserve">Tycho hath obſerv'd, that
              <lb/>
            Venus is ſometimes nearer than the Sun or Mer-
              <lb/>
            cury, and ſometimes farther off than both;
              <lb/>
            </s>
            <s xml:id="echoid-s556" xml:space="preserve">which appearances Regiomontanus himſelf does
              <lb/>
            Acknowledge, and withal, does confeſs that
              <lb/>
            they cannot be reconciled to the common Hy-
              <lb/>
            potheſis.</s>
            <s xml:id="echoid-s557" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s558" xml:space="preserve">But for your better Satisſaction herein, I
              <lb/>
            ſhall refer you to the above nam'd Scheiner,
              <lb/>
            in his Roſa Urſina, in whom you may ſee both
              <lb/>
            Authorities and Reaſon, very Largely </s>
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