Galilei, Galileo, The systems of the world, 1661

List of thumbnails

< >
71
71
72
72
73
73
74
74
75
75
76
76
77
77
78
78
79
79
80
80
< >
page |< < of 948 > >|
    <archimedes>
      <text>
        <body>
          <chap>
            <p type="main">
              <s>
                <pb xlink:href="065/01/080.jpg" pagenum="74"/>
              the wall hath it? </s>
              <s>The Sun ſhineth on that wall; from thence it </s>
            </p>
            <p type="main">
              <s>
                <arrow.to.target n="marg191"/>
                <lb/>
              is reverberated upon the wall of the Hall, from thence it's
                <lb/>
              cted upon that chamber, ſo that it falls on it at the third reflection:
                <lb/>
              and I am very certain, that there is in that place more light, than
                <lb/>
              if the Moons light had directly faln upon it.</s>
            </p>
            <p type="margin">
              <s>
                <margin.target id="marg191"/>
                <emph type="italics"/>
              The third
                <lb/>
              ction of a Wall
                <lb/>
              minates more than
                <lb/>
              the firſt of the
                <lb/>
              Moon.
                <emph.end type="italics"/>
              </s>
            </p>
            <p type="main">
              <s>SIMPL. </s>
              <s>But this I cannot believe; for the illumination of the
                <lb/>
              Moon, eſpecially when it is at the full, is very great.</s>
            </p>
            <p type="main">
              <s>SAGR. </s>
              <s>It ſeemeth great by reaſon of the circumjacent dark
                <lb/>
                <arrow.to.target n="marg192"/>
                <lb/>
              places; but abſolutely it is not much, and is leſs than that of the
                <lb/>
              twilight half an hour after the Sun is ſet; which is manifeſt,
                <lb/>
              cauſe you ſee not the ſhadows of the bodies illuminated by the
                <lb/>
              Moon till then, to begin to be diſtinguiſhed on the Earth. </s>
              <s>
                <lb/>
              ther, again, that third reflection upon that chamber, illuminates
                <lb/>
              more than the firſt of the Moon, may be known by going thether,
                <lb/>
              and reading a Book, and afterwards ſtanding there in the night
                <lb/>
              by the Moons light, which will ſhew by which of them lights one
                <lb/>
              may read more or leſs plainly, but I believe without further tryal,
                <lb/>
              that one ſhould ſee leſs diſtinctly by this later.</s>
            </p>
            <p type="margin">
              <s>
                <margin.target id="marg192"/>
                <emph type="italics"/>
              The light of the
                <lb/>
              Moon weaker than
                <lb/>
              that of the
                <lb/>
              light.
                <emph.end type="italics"/>
              </s>
            </p>
            <p type="main">
              <s>SALV. Now,
                <emph type="italics"/>
              Simplicius,
                <emph.end type="italics"/>
              (if haply you be ſatisfied) you may
                <lb/>
              conceive, as you your ſelf know very well, that the Earth doth
                <lb/>
              ſhine no leſs than the Moon; and the only remembring you of ſome
                <lb/>
              things, which you knew of your ſelf, and learn'd not of me, hath
                <lb/>
              aſſured you thereof: for I taught you not that the Moon ſhews
                <lb/>
              lighter by night than by day, but you underſtood it of your ſelf;
                <lb/>
              as alſo you could tell me that a little Cloud appeareth as lucid as
                <lb/>
              the Moon: you knew alſo, that the illumination of the Earth
                <lb/>
              not be ſeen by night; and in a word, you knew all this, without
                <lb/>
              knowing that you knew it. </s>
              <s>So that you have no reaſon to be
                <lb/>
              pulous of granting, that the dark part of the Earth may illuminate
                <lb/>
              the dark part of the Moon, with no leſs a light than that
                <lb/>
              with the Moon illuminates the obſcurities of the night, yea rather
                <lb/>
              ſo much the greater, inaſmuch as the Earth is forty times bigger
                <lb/>
              than the Moon.</s>
            </p>
            <p type="main">
              <s>SIMPL. </s>
              <s>I muſt confeſs that I did believe, that that ſecondary
                <lb/>
              light had been the natural light of the Moon.</s>
            </p>
            <p type="main">
              <s>SALV. </s>
              <s>And this alſo you know of your ſelf, and perceive not
                <lb/>
              that you know it. </s>
              <s>Tell me, do not you know without teaching,
                <lb/>
              that the Moon ſhews it ſelf more bright by night than by day, in
                <lb/>
                <arrow.to.target n="marg193"/>
                <lb/>
              reſpect of the obſcurity of the ſpace of the ambient? </s>
              <s>and
                <lb/>
              quently, do you not know
                <emph type="italics"/>
              in genere,
                <emph.end type="italics"/>
              that every bright body ſhews
                <lb/>
              the clearer, by how much the ambient is obſcurer?</s>
            </p>
            <p type="margin">
              <s>
                <margin.target id="marg193"/>
                <emph type="italics"/>
              Luminous bodies
                <lb/>
              appear the brighter
                <lb/>
              in an obſcurer
                <emph.end type="italics"/>
                <lb/>
              bient.</s>
            </p>
            <p type="main">
              <s>SIMPL. </s>
              <s>This I know very well.</s>
            </p>
            <p type="main">
              <s>SALV. </s>
              <s>When the Moon is horned, and that ſecondary light
                <lb/>
              ſeemeth to you very bright, is it not ever nigh the Sun, and
                <lb/>
              ſequently, in the light of the
                <emph type="italics"/>
              crepuſculum,
                <emph.end type="italics"/>
              (twilight?)</s>
            </p>
          </chap>
        </body>
      </text>
    </archimedes>