Descartes, René, Renati Des-Cartes principia philosophiae

Page concordance

< >
Scan Original
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
< >
page |< < of 334 > >|
    <archimedes>
      <text>
        <body>
          <chap>
            <p type="main">
              <s>
                <pb pagenum="191"/>
                <arrow.to.target n="marg1192"/>
                <lb/>
              rectâ lineà quee tranſit per centra Cometae & Solis
                <lb/>
              interdum nonnihil ab eâ deflectens; ac denique in­
                <lb/>
              terdum latior, interdum anguſtior, vel etiam lucidior,
                <lb/>
              cùm nempe radii laterales verſùs oculum convergunt.
                <lb/>
                <arrow.to.target n="marg1193"/>
              Haec enim omnia ſequuntur ab irregularitate ſphae­
                <lb/>
              roidis DEFGH: quippe verſùs polos, ubi ejus figura
                <lb/>
              depreſſior eſt, caudas Cometarum exhibere debet ma­
                <lb/>
              gis rectas & latas; in flexu qui eſt inter polos & ecli­
                <lb/>
              pticam, magis curvas, & à Solis oppoſito deflectentes;
                <lb/>
                <arrow.to.target n="marg1194"/>
              &sſecundùm iſtius ſlexûs longèitudinem, magis luicidas
                <lb/>
              &sanguſtas. </s>
              <s>Nec puto quicquam hactenus circa Co­
                <lb/>
              metas fuiſſe obſervatum, ſaltem quod nec pro fabulâ,
                <lb/>
              nec pro miraculo ſit habendum, cujus cauſſa hîc non
                <lb/>
              habeatur. </s>
            </p>
            <p type="margin">
              <s>
                <margin.target id="marg1190"/>
              CXXXVIII.
                <lb/>
              Cur Cometarum cauda, non ſemper in</s>
            </p>
            <p type="margin">
              <s>
                <margin.target id="marg1191"/>
              30</s>
            </p>
            <p type="margin">
              <s>
                <margin.target id="marg1192"/>
              parte à Sole directè
                <lb/>
              averſa, nec ſemper
                <lb/>
              rectâ videatur.</s>
            </p>
            <p type="margin">
              <s>
                <margin.target id="marg1193"/>
              5</s>
            </p>
            <p type="margin">
              <s>
                <margin.target id="marg1194"/>
              10</s>
            </p>
            <p type="main">
              <s>
                <arrow.to.target n="marg1195"/>
                <lb/>
                <arrow.to.target n="marg1196"/>
              Quaeri tantùm poteſt, cur non etiam comae circa
                <lb/>
              ſtellas fixas, ac circa altiores planetas Jovem & Satur­
                <lb/>
              num appareant. </s>
              <s>Sed facilis reſponſio eſt. </s>
              <s>Primò, ex
                <lb/>
              eo quòd non ſoleant videri in Cometis, cùm eorum
                <lb/>
              diameter apparens non eſt major quàm fixarum, quia
                <lb/>
                <arrow.to.target n="marg1197"/>
              tunc iſti radii ſecundarii non habent ſatis virium ad
                <lb/>
              oculos movendos. </s>
              <s>Ac deinde, quantum ad fixas, quia
                <lb/>
              cùm lumen à Sole non mutuentur, ſed illud ex ſe ipſis
                <lb/>
              emittant, iſta earum coma, ſi quee ſit, hinc inde in om­
                <lb/>
              nes partes ſpargi debet, atque eite perbrevis; jamque
                <lb/>
                <arrow.to.target n="marg1198"/>
              revera circa ipſas talis coma eſſe videtur: neque enim
                <lb/>
              uniformi lineâ circumſcriptae, ſed vagis radiis undi­
                <lb/>
              que cinctae apparent; & non malè fortèan earum etiam
                <lb/>
              ſcintillationem (cujus tamen plures aliae cauſee eſſe
                <lb/>
              poſſunt) huc referemus. </s>
              <s>Quantum autem ad Jovem
                <lb/>
                <arrow.to.target n="marg1199"/>
              &sSaturnum, non dubito quin, ubi ae
                <gap/>
              r eſt admodum
                <lb/>
              purus, breves etiam interdum comae, in partem à Sole </s>
            </p>
          </chap>
        </body>
      </text>
    </archimedes>
Impressum