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

Table of handwritten notes

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        <div xml:id="echoid-div155" type="section" level="1" n="43">
          <p>
            <s xml:id="echoid-s2287" xml:space="preserve">
              <pb o="154" file="0166" n="166" rhead="That the Moon may be a World."/>
            Vertical point. </s>
            <s xml:id="echoid-s2288" xml:space="preserve">Or, which is the more eaſie
              <lb/>
              <note position="left" xlink:label="note-0166-01" xlink:href="note-0166-01a" xml:space="preserve">Stevinnius
                <lb/>
              Geog. l. 3.
                <lb/>
              prop. 3.</note>
            way, when a man ſhall chooſe ſuch a Station,
              <lb/>
            where he may at ſome diſtance, diſcern the
              <lb/>
            place on which the Cloud does caſt its ſhadow,
              <lb/>
            and withal does obſerve, how much both the
              <lb/>
            Cloud and the Sun decline from the Vertical
              <lb/>
            point. </s>
            <s xml:id="echoid-s2289" xml:space="preserve">From which he may eaſily conclude
              <lb/>
            the true Altitude of it, as you may more plain-
              <lb/>
            ly conceive, by this following Diagram.</s>
            <s xml:id="echoid-s2290" xml:space="preserve"/>
          </p>
          <figure number="7">
            <image file="0166-01" xlink:href="http://echo.mpiwg-berlin.mpg.de/zogilib?fn=/permanent/library/xxxxxxxx/figures/0166-01"/>
          </figure>
          <p>
            <s xml:id="echoid-s2291" xml:space="preserve">Where A B is a perpendicular from the cloud,
              <lb/>
            G the Station of him that meaſures, D the place
              <lb/>
            where the ſhadow of the Cloud doth fall.</s>
            <s xml:id="echoid-s2292" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s2293" xml:space="preserve">The inſtrument being directed from the Sta-
              <lb/>
            tion G, to the Cloud at A, the perpendicular
              <lb/>
            will ſhew the Angle B A G. </s>
            <s xml:id="echoid-s2294" xml:space="preserve">Then letting the
              <lb/>
            Sun ſhine through the ſights of your Inſtru-
              <lb/>
            ment, the perpendicular of it will give the
              <lb/>
            Angle B A D. </s>
            <s xml:id="echoid-s2295" xml:space="preserve">After wards having meaſured
              <lb/>
              <note position="left" xlink:label="note-0166-02" xlink:href="note-0166-02a" xml:space="preserve">Pitiſc. Tri-
                <lb/>
              gon.</note>
            the diſtance G D by paces, you may, according
              <lb/>
            to the common Rules, find the height B A.</s>
            <s xml:id="echoid-s2296" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s2297" xml:space="preserve">But if without making the Obſervation, you
              <lb/>
            would know of what Altitude the higheſt of
              <lb/>
              <note symbol="*" position="left" xlink:label="note-0166-03" xlink:href="note-0166-03a" xml:space="preserve">Subt. l.
                <lb/>
              17.</note>
            theſe are found by Obſervation; </s>
            <s xml:id="echoid-s2298" xml:space="preserve"> Gardan an- ſwers, not above two miles; </s>
            <s xml:id="echoid-s2299" xml:space="preserve"> Keplar, not
              <note symbol="*" position="left" xlink:label="note-0166-04" xlink:href="note-0166-04a" xml:space="preserve">Epit. Co-
                <lb/>
              per. l. 1. p. 3.</note>
            1600 Paces, or thereabouts.</s>
            <s xml:id="echoid-s2300" xml:space="preserve"/>
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