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="154" file="0166" n="166" rhead="That the Moon may be a World."/>
            Vertical point. </s>
            <s xml:space="preserve">Or, which is the more eaſie
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              <anchor type="note" xlink:label="note-0166-01a" xlink:href="note-0166-01"/>
            way, when a man ſhall chooſe ſuch a Station,
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            where he may at ſome diſtance, diſcern the
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            place on which the Cloud does caſt its ſhadow,
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            and withal does obſerve, how much both the
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            Cloud and the Sun decline from the Vertical
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            point. </s>
            <s xml:space="preserve">From which he may eaſily conclude
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            the true Altitude of it, as you may more plain-
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            ly conceive, by this following Diagram.</s>
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            <note position="left" xlink:label="note-0166-01" xlink:href="note-0166-01a" xml:space="preserve">Stevinnius
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            Geog. l. 3.
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            prop. 3.</note>
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            <s xml:space="preserve">Where A B is a perpendicular from the cloud,
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            G the Station of him that meaſures, D the place
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            where the ſhadow of the Cloud doth fall.</s>
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            <s xml:space="preserve">The inſtrument being directed from the Sta-
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            tion G, to the Cloud at A, the perpendicular
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            will ſhew the Angle B A G. </s>
            <s xml:space="preserve">Then letting the
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            Sun ſhine through the ſights of your Inſtru-
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            ment, the perpendicular of it will give the
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            Angle B A D. </s>
            <s xml:space="preserve">After wards having meaſured
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            the diſtance G D by paces, you may, according
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            to the common Rules, find the height B A.</s>
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            <note position="left" xlink:label="note-0166-02" xlink:href="note-0166-02a" xml:space="preserve">Pitiſc. Tri-
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            gon.</note>
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            <s xml:space="preserve">But if without making the Obſervation, you
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            would know of what Altitude the higheſt of
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              <anchor type="note" xlink:label="note-0166-03a" xlink:href="note-0166-03"/>
            theſe are found by Obſervation; </s>
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            Gardan an-ſwers, not above two miles; </s>
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              <anchor type="note" xlink:href="" symbol="*"/>
            Keplar, not above
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            1600 Paces, or thereabouts.</s>
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          <div type="float" level="2" n="21">
            <note symbol="*" position="left" xlink:label="note-0166-03" xlink:href="note-0166-03a" xml:space="preserve">Subt. l.
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            17.</note>
            <note symbol="*" position="left" xlink:label="note-0166-04" xlink:href="note-0166-04a" xml:space="preserve">Epit. Co-
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            per. l. 1. p. 3.</note>
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