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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              <pb o="113" file="0293" n="293" rhead="That the Earth may be a Planet."/>
            about by its meer motion, (if there were
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            nothing elſe) ſo little a part of the adjoin-
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            ing Air, as is here repreſented: </s>
            <s xml:space="preserve">And yet,</s>
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            <s xml:space="preserve">1. </s>
            <s xml:space="preserve">The diſproportion betwixt the thick-
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            neſs of the Earth, and this Orb of Air, is
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            far greater than could be expreſt in the Fi-
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            gure, being but as twenty miles, which is
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            at moſt the thickneſs of this Air, unto 3456
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            miles, which is the Semidiameter of our
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            Earth, and ſo is but as an inſenſible number
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            in reſpect of this other.</s>
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            <s xml:space="preserve">2. </s>
            <s xml:space="preserve">Beſides the meer motion of the Earth,
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            which in probability (being ſuch a rugged
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            Body) might be enough to carry ſo little a
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            part of the Air along with it; </s>
            <s xml:space="preserve">there is alſo
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            (as we ſuppoſe) a magnetical vigour which
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            proceeds from it, whereby ’tis more able to
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            make all things that are near unto it, to ob-
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            ſerve the ſame Revolution.</s>
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            <s xml:space="preserve">But if it be ſo (ſaith
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            Alex. </s>
            <s xml:space="preserve">Roſſ.) </s>
            <s xml:space="preserve">that
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            not only the Man, but the Medium alſo, and
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            the Object be moved, this muſt needs be
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            ſuch a great hindrance to the ſight, that the
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            Eye cannot judg exactly of any thing. </s>
            <s xml:space="preserve">For
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            ſuppoſe the Man alone to be in a motion, he
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            could not ſee ſo well as when he is ſtill; </s>
            <s xml:space="preserve">but
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            now, if not only he, but his Spectacles,
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            and Book, were all moved, he would not
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            be able to diſcern any thing diſtinctly.</s>
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            <note symbol="*" position="right" xlink:label="note-0293-01" xlink:href="note-0293-01a" xml:space="preserve">Lib. 1.
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            ſect. 1. c. 5.</note>
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            <s xml:space="preserve">I anfwer: </s>
            <s xml:space="preserve">The Conſequence were perti-
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            nent, if all theſe were ſeveral motions: </s>
            <s xml:space="preserve">but
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            if the Subject, and Medium, and Object,
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            were all carried with one and the ſame equal
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            motion, (as it is here ſuppoſed) this could</s>
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