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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        <div type="section" level="1" n="43">
          <pb o="147" file="0159" n="159" rhead="That the Moon may be a World."/>
            <s xml:space="preserve">1. </s>
            <s xml:space="preserve">When a Man is in the bottom of a deep
            River, tho’ he have over him a multitude of
            heavy Waters, yet he is not burdened with
            the weight of them. </s>
            <s xml:space="preserve">And though another Bo-
            dy, that ſhould be but of an equal Gravity,
            with theſe Waters, when they are taken out,
            would be heavy enough to preſs him to death;
            <s xml:space="preserve">yet notwithſtanding whilſt they are in the
            Channel, they do not in the leaſt manner cruſh
            him with their Load. </s>
            <s xml:space="preserve">The reaſon is, becauſe
            they are both in their right places; </s>
            <s xml:space="preserve">and ’tis
            proper for the Man being the more condenſed
            Body, to be lower than the Waters. </s>
            <s xml:space="preserve">or ra-
            ther thus, becauſe the body of the Man does
            more nearly agree with the Earth, in this affe-
            ction, which is the ground of its attraction,
            and therefore doth more ſtrongly attract it,
            than the waters that are over it. </s>
            <s xml:space="preserve">Now, as in
            ſuch a caſe, a body may loſe the Operation
            of its Gravity, which is, to move, or to preſs
            downwards: </s>
            <s xml:space="preserve">So may it likewiſe, when it is
            ſo far out of its place, that this attractive
            Power cannot reach unto it.</s>
            <s xml:space="preserve"/>
            <s xml:space="preserve">’Tis a pretty Notion to this purpoſe, menti-
            oned by Albertus de Saxonia, and out of him
              <anchor type="note" xlink:label="note-0159-01a" xlink:href="note-0159-01"/>
            by Francis Mendoca; </s>
            <s xml:space="preserve">that the Air is in ſome
              <anchor type="note" xlink:label="note-0159-02a" xlink:href="note-0159-02"/>
            part of it Navigable. </s>
            <s xml:space="preserve">And that upon this Sta-
            tick Principle; </s>
            <s xml:space="preserve">any Braſs or Iron Veſſel (ſup-
            poſe a Kettle) whoſe ſubſtance is much hea-
            vier than that of the Water, yet being filled
              <anchor type="note" xlink:label="note-0159-03a" xlink:href="note-0159-03"/>
            with the lighter Air, it will ſwim upon it, and
            not ſink. </s>
            <s xml:space="preserve">So ſuppoſe a Cup, or Wooden Veſ-
            ſel, upon the outward borders of this Elemen-
            tary Air, the Cavity of it being filled with
            Fire, or rather Æthereal Air, it muſt neceſ-</s>