Galilei, Galileo, The systems of the world, 1661

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      <text>
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          <chap>
            <p type="main">
              <s>
                <pb xlink:href="065/01/074.jpg" pagenum="68"/>
              light in the extremities, than in the middle parts.</s>
            </p>
            <p type="main">
              <s>SALV. </s>
              <s>The doubt is ingenious and worthy of conſideration;
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              and as it but juſt now came into your mind unawares, ſo I will
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              like wiſe anſwer with what firſt comes into my thoughts, and it may
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              happily fall out, that by thinking more upon it, I may ſtumble
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              upon a better reply. </s>
              <s>But before, that I labyrinth my ſelf any
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              ther, it would be neceſſary, that we aſſure our ſelves by ſome
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              periment, whether your objection prove in effect, what it ſeemeth
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              to conclude in appearance; and therefore taking once more the
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              ſame paper, and making it to incline, by bending a little part
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              thereof upon the remainder, let us try whether expoſing it to the
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              Sun, ſo that the rayes of light fall upon the leſſer part directly,
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              and upon the other obliquely; this which receiveth the rayes
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              ly appeareth more lucid; and ſee here by manifeſt experience,
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              that it is notably more clear. </s>
              <s>Now if your objection be concluſive,
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              it will follow, that ſtooping with our eye ſo, that in beholding
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              the other greater part, leſs illuminated, in compreſſion or
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              ſhortning, it appear unto us no bigger than the other, more ſhining;
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              and that conſequently, it be not beheld at a greater angle than
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              that; it will neceſſarily enſue, I ſay, that its light be encreaſed, ſo
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              that it do ſeem to us as bright as the other. </s>
              <s>See how I behold, and
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              look upon it ſo obliquely, that it appeareth to me narrower than
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              the other; but yet, notwithſtanding its obſcurity, doth not to
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              my perceiving, at all grow clearer. </s>
              <s>Try now if the ſame ſucceed
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              to you.</s>
            </p>
            <p type="main">
              <s>SAGR. </s>
              <s>I have look't upon it, and though I have ſtooped with
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              my eye, yet cannot I ſee the ſaid ſuperficies encreaſe in light or
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              clarity; nay me thinks it rather grows more dusky.</s>
            </p>
            <p type="main">
              <s>SALV. </s>
              <s>We are hitherto confident of the invalidity of the
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              jection; In the next place, as to the ſolution, I believe, that, by
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              reaſon the Superficies of this paper is little leſſe than ſmooth, the
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              rayes are very few, which be reflected towards the point of
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              dence, in compariſon of the multitude, which are reflected
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              wards the oppoſite parts; and that of thoſe few more and more
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              are loſt, the nearer the viſive rayes approach to thoſe lucid rayes
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              of incidence; and becauſe it is not the incident rayes, but thoſe
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              which are reflected to the eye, that make the object appear
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              minous; therefore, in ſtooping the eye, there is more loſt than got,
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              as you your ſelf confeſſe to have ſeen in looking upon the
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              rer part of the paper.</s>
            </p>
            <p type="main">
              <s>SAGR. </s>
              <s>I reſt ſatisfied with this experiment and reaſon: It
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              mains now, that
                <emph type="italics"/>
              Simplicius
                <emph.end type="italics"/>
              anſwer to my other queſtion, and tell
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              me what moves the
                <emph type="italics"/>
              Peripateticks
                <emph.end type="italics"/>
              to require this ſo exact rotundity
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              in the Cœleſtial bodies.</s>
            </p>
            <p type="main">
              <s>SIMPL. </s>
              <s>The Cœleſtial bodies being ingenerable, inalterable, </s>
            </p>
          </chap>
        </body>
      </text>
    </archimedes>
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