Descartes, René, Renati Des-Cartes principia philosophiae

Table of figures

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              <s>
                <pb pagenum="188"/>
              ipſis adionem illam obliquè excipiunt; ideòque, quam­
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              vis praecipuum ejus radium rectà verſùs B deducant,
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              innumeros tamen alios debiliores utrimque verſùs D
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              &sE diſpergunt. </s>
              <s>Eodemque modo, ſi pellatur globus F
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              verſùs G, cùm ejus actio pervenit ad H,
                <arrow.to.target n="marg1171"/>
              communi­
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              catur globulis 7, 8, 9, qui praecipuum quidem ejus
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              radium mittunt ad G, ſed alios etiam verſùs D & B
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              diſpergunt. </s>
              <s>Hîcque notanda eſt differential, quae oritur
                <lb/>
              ex obliquitate incidentiae iſtarum adionum in circu­
                <lb/>
              lum CH: actio enim ab A ad C,
                <arrow.to.target n="marg1172"/>
              perpendicula­
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              riter incidat in illum circulum, radios ſuos aequaliter
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              utrimque diſpergit verſùs D & E; actio autem ab F ad
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              H, quae in eundem obliquè incidit, non diſpergit ſuos
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              niſi verſùs ipſius centrum, ſaltem ſi obliquitas inci­
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              dentiae ſupponatur eſſe graduum 90; ſi
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              ſuppona­
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              tur minor, nonnulli quidem ejus actionis radii etiam
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              in aliam partem mittentur, ſed aliis multò debiliores,
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              &sideò vix ſenſibiles, niſi cùm iſta obliquitas eſt valde
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              parva: contrà autem radii, qui verſùs centrum circuli
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              obliquè ſparguntur, eò ſunt fortèiores, quòd
                <arrow.to.target n="marg1174"/>
              obli­
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              quitas eſt major. </s>
            </p>
            <p type="margin">
              <s>
                <margin.target id="marg1163"/>
              CXXXV.
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              Explicatio iſtius re­
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              fractionis. </s>
            </p>
            <p type="margin">
              <s>
                <margin.target id="marg1164"/>
              30</s>
            </p>
            <p type="margin">
              <s>
                <margin.target id="marg1165"/>
              5</s>
            </p>
            <p type="margin">
              <s>
                <margin.target id="marg1166"/>
              10</s>
            </p>
            <p type="margin">
              <s>
                <margin.target id="marg1167"/>
              15</s>
            </p>
            <p type="margin">
              <s>
                <margin.target id="marg1168"/>
              20</s>
            </p>
            <p type="margin">
              <s>
                <margin.target id="marg1169"/>
              25</s>
            </p>
            <p type="margin">
              <s>
                <margin.target id="marg1170"/>
              30</s>
            </p>
            <p type="margin">
              <s>
                <margin.target id="marg1171"/>
              5</s>
            </p>
            <p type="margin">
              <s>
                <margin.target id="marg1172"/>
              10</s>
            </p>
            <p type="margin">
              <s>
                <margin.target id="marg1173"/>
              15</s>
            </p>
            <p type="margin">
              <s>
                <margin.target id="marg1174"/>
              20</s>
            </p>
            <figure id="fig50" number="51"/>
            <p type="main">
              <s>
                <arrow.to.target n="marg1175"/>
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              Quorum omnium demonſtratione percept^, facile
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              eſt illam transferre ad globulos coeleſtes: quamvis
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              enim nullus ſit locus, in quo ſic majuſculi ex iſtis
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              globulis alios multò minores tangant, quia tamen
                <arrow.to.target n="marg1176"/>
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              gradatim ſunt minores & minores, à certo termino
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              uſque ad Solem, ut dictum eſt a, facilè credi poteſt non
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              minorem eſſe differentiam, inter illos qui ſunt ſupra
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              orbitam Saturni, & illos qui ſunt juxta orbitam Terrae,
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              quàm inter majores & minores mox deſcriptos
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              </s>
            </p>
          </chap>
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