Descartes, René, Renati Des-Cartes principia philosophiae

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    <archimedes>
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          <chap>
            <p type="main">
              <s>
                <pb pagenum="186"/>
              in parte à Sole praeterpropter averſà videri adeò ut
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              ſi Terra ſtet in lineâ rectà inter Cometam & Solem,
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              crines in omnes partes diſperſi circa illum appareant. </s>
              <s>
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              Et Cometa anni 1475, cùm primùm viſus eſt, comam
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              praeferebat; in fine autem ſuae apparitionis, quia
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              oppoſitâ coeli regione verſabatur, comam poſt ſe tra­
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              hebat. </s>
              <s>Haec etiam coma longèior eſt vel brevior: tum
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              ratione magnitudinis Cometae, in minoribus enim
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              nulla apparet, nec etiam in magnis, cùm à noſtro
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              aſpectu recedentes perexigui eſſe videntur; tum
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              ratione loci, caeteris enim paribus, quò terra remo­
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              tior eſt à lineà rectâ, quae duci poteſt à Cometâ ad
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              Solem, eò ipſius coma longèior eſt; & interdum latente
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              Cometâ ſub radiis Solis, ejus comae extremitas inſtar
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              trabis igneae ſola conſpicitur. </s>
              <s>Ac denique coma
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              interdum paullò latior eſt, interdum anguſtior; inter­
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              dum recta, interdum curva; & interdum à Sole dire­
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              ctè averſa, interdum non ita praeciſè. </s>
            </p>
            <p type="margin">
              <s>
                <margin.target id="marg1155"/>
              CXXXIII.
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              De Cometarum comâ,
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              &svariis ejus phaeno­
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              menis. </s>
            </p>
            <p type="margin">
              <s>
                <margin.target id="marg1156"/>
              30</s>
            </p>
            <p type="margin">
              <s>
                <margin.target id="marg1157"/>
              5</s>
            </p>
            <p type="margin">
              <s>
                <margin.target id="marg1158"/>
              10</s>
            </p>
            <p type="margin">
              <s>
                <margin.target id="marg1159"/>
              15</s>
            </p>
            <p type="main">
              <s>
                <arrow.to.target n="marg1160"/>
                <lb/>
              Quorum omnium rationes ut intelligantur, novum
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              quoddam genus refractionis, de quo in Dioptricâ
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              actum eſt, quia in corporibus terreſtribus non nota­
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              tur, hîc eſt conſiderandum. </s>
              <s>Nempe, ex eo quòd glo­
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              buli coeleſtes non ſint omnes inter ſe aequales, ſed
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              paullatim minuantur à certo termino, intra quem
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              continetur ſphaera Saturni, uſque ad Solem,
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              radios luminis, qui per majores ex iſtis globulis com­
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              municantur, cùm ad minores deveniunt, non modò
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              ſecundùm lineas rectas progredi debere, ſed etiam ex
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              parte ad latera refringi & diſpergi. </s>
            </p>
            <p type="margin">
              <s>
                <margin.target id="marg1160"/>
              CXXXIV.
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              De quâdam, refractio­
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              ne, à quâ iſta coma
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              dependet. </s>
            </p>
            <p type="margin">
              <s>
                <margin.target id="marg1161"/>
              20</s>
            </p>
            <p type="margin">
              <s>
                <margin.target id="marg1162"/>
              25</s>
            </p>
            <p type="main">
              <s>
                <arrow.to.target n="marg1163"/>
                <lb/>
              Conſideremus, exempli cauſſâ, hanc figuram, in
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              multis globulis perexiguis incumbunt alii multò </s>
            </p>
          </chap>
        </body>
      </text>
    </archimedes>
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