Galilei, Galileo, The systems of the world, 1661

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    <archimedes>
      <text>
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            <p type="main">
              <s>
                <pb xlink:href="065/01/082.jpg" pagenum="76"/>
              Quadrature, the ſame appears very weak, becauſe it continually
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              loſeth more and more of the view of the luminous part of the
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              Earth: and yet it ſhould ſucceed quite contrary, if that light were
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              its own, or communicated to it from the Stars; for then we ſhould
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              ſee it in the depth of night, and in ſo very dark an ambient.</s>
            </p>
            <p type="margin">
              <s>
                <margin.target id="marg194"/>
              *
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              By the Moons two
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              Quadratures
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              you
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              are to underſtand
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              its firſt and last
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              quarters, as
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              ſtrologers call them
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              </s>
            </p>
            <p type="main">
              <s>SIMPL. </s>
              <s>Stay a little; for I juſt now remember, that I have
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              read in a little modern tract, full of many novelties; “That this
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              ſecondary light is not derived from the Stars, nor innate in the
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              Moon, and leaſt of all communicated by the Earth, but that it is
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                <arrow.to.target n="marg195"/>
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              received from the ſame illumination of the Sun, which, the
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              ſtance of the Lunar Globe being ſomewhat tranſparent,
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              trateth thorow all its body; but more livelily illuminateth the
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              ſuperficies of the Hemiſphere expoſed to the rays of the Sun:
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              and its proſundity imbuing, and (as I may ſay) ſwallowing that
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              light, after the manner of a cloud or chryſtal, tranſmits it, and
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              renders it viſibly lucid. </s>
              <s>And this (if I remember aright) he
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              proveth by Authority, Experience and Reaſon; citing
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              Cleomedes,
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              Vitellion, Macrobius,
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              and a certain other modern Author: and
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              adding, That it is ſeen by experience to ſhine moſt in the days
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              neareſt the Conjunction, that is, when it is horned, and is chiefly
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              bright about its limb. </s>
              <s>And he farther writes, That in the Solar
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              Ecclipſes, when it is under the
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              Diſcus
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              of the Sun, it may be ſeen
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              tranſlucid, and more eſpecially towards its utmoſt Circle. </s>
              <s>And
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              in the next place, for Arguments, as I think, he ſaith, That it not
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              being able to derive that light either from the Earth, or from the
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              Stars, or from it ſelf, it neceſſarily follows, that it cometh from
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              the Sun. </s>
              <s>Beſides that, if you do but grant this ſuppoſition, one
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              may eaſily give convenient reaſons for all the particulars that
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              occur. </s>
              <s>For the reaſon why that ſecundary light ſhews more
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              lively towards the outmoſt limb, is, the ſhortneſs of the ſpace
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              that the Suns rays hath to penetrate, in regard that of the lines
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              which paſs through a circle, the greateſt is that which paſſeth
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              through the centre, and of the reſt, thoſe which are fartheſt from
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              it, are always leſs than thoſe that are nearer. </s>
              <s>From the ſame
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              principle, he ſaith, may be ſhewn why the ſaid light doth not
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              much diminiſh. </s>
              <s>And laſtly, by this way the cauſe is aſſigned
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              whence it comes, that that ſame more ſhining circle about the
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              utmoſt edge of the Moon, is ſeen at the time of the Solar
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              clipſe, in that part which lyeth juſt under the
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              Diſcus
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              of the Sun,
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              but not in that which is beſide the
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              Diſcus
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              : which happeneth
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              becauſe the rays of the Sun paſs directly to our eye, through the
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              parts of the Moon underneath: but as for the parts which are
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              beſides it, they fall beſides the eye.”</s>
            </p>
            <p type="margin">
              <s>
                <margin.target id="marg195"/>
                <emph type="italics"/>
              The ſecondary
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              light of the Moon
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              cauſed by the Sun,
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              according to ſome.
                <emph.end type="italics"/>
              </s>
            </p>
            <p type="main">
              <s>SALV. </s>
              <s>If this Philoſopher had been the firſt Author of this
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              pinion, I would not wonder that he ſhould be ſo affectionate to it, </s>
            </p>
          </chap>
        </body>
      </text>
    </archimedes>
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