Descartes, René, Renati Des-Cartes principia philosophiae

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    <archimedes>
      <text>
        <body>
          <chap>
            <p type="main">
              <s>
                <pb pagenum="65"/>
              genter erit advertenda, fuſiuſque infrà exponetur a. </s>
            </p>
            <p type="margin">
              <s>
                <margin.target id="marg464"/>
              XXXIX.
                <lb/>
              Altera lex naturae:
                <lb/>
              quòd omnis motus ex
                <lb/>
              ſe ipſo ſit rectus; &
                <lb/>
              ideò quae circulariter
                <lb/>
              moventur, tendere
                <lb/>
              ſemper ut recedankt ¬à
                <lb/>
              centro circuli quem
                <lb/>
              deſcribunt. </s>
            </p>
            <p type="margin">
              <s>
                <margin.target id="marg465"/>
              20</s>
            </p>
            <p type="margin">
              <s>
                <margin.target id="marg466"/>
              25</s>
            </p>
            <p type="margin">
              <s>
                <margin.target id="marg467"/>
              30</s>
            </p>
            <p type="margin">
              <s>
                <margin.target id="marg468"/>
              5</s>
            </p>
            <p type="margin">
              <s>
                <margin.target id="marg469"/>
              10</s>
            </p>
            <p type="margin">
              <s>
                <margin.target id="marg470"/>
              15</s>
            </p>
            <p type="margin">
              <s>
                <margin.target id="marg471"/>
              20</s>
            </p>
            <p type="margin">
              <s>
                <margin.target id="marg472"/>
              25</s>
            </p>
            <p type="margin">
              <s>
                <margin.target id="marg473"/>
              30</s>
            </p>
            <p type="main">
              <s>
                <arrow.to.target n="marg474"/>
                <lb/>
              Tertia lex naturae haec eſt: ubi corpus quod move­
                <lb/>
              tur alteri occurrit, ſi minorem habeat vim ad pergen­
                <lb/>
              dum ſecundùm lineam rectam, quàm hoc alterum ad
                <lb/>
                <arrow.to.target n="marg475"/>
              ei reſiſtendum, tunc deflectitur in aliam partem, &
                <lb/>
              motum ſuum retinendo ſolam motús determinationem
                <lb/>
              amittit; ſi verò habeat majorem, tunc alterum corpus
                <lb/>
              ſecum movet, ac quantum ei dat de ſuo motu, tantun­
                <lb/>
              dem perdit. </s>
              <s>Ita experimur dura quaelibet corpora pro­
                <lb/>
                <arrow.to.target n="marg476"/>
              jecta, cúm in aliud durum corpus impingunt, non ideò
                <lb/>
              à motu ceſſare, ſed verſus contrariam partem reflecti;
                <lb/>
              contrà verò, cúm occurrunt corpori molli, quia facilè
                <lb/>
              in illud motum omnem ſuum tranſmittunt, ideò ſtatim
                <lb/>
              ad quietem reduci. </s>
              <s>Atque omnes cauſae particulares
                <lb/>
                <arrow.to.target n="marg477"/>
              mutationum, quae corporibus ſunt;
                <lb/>
              accidunt, in hac tertiâ
                <lb/>
              lege continentur, ſaltem eá quae ipſae corporea ſunt;
                <lb/>
              an enim, & qualem, mentes humanae vel Angelicá vim
                <lb/>
              habeant corpora movendi, non jam inquirimus, ſed ad
                <lb/>
              tractationem
                <emph type="italics"/>
              de homine reſervamus b. </s>
            </p>
            <p type="margin">
              <s>
                <margin.target id="marg474"/>
              5XL.
                <lb/>
              Tertia lex: quòd unum
                <lb/>
              corpus, alteri fortio­
                <lb/>
              ri occurrendo, nihil
                <lb/>
              amittat de ſuo motu;
                <lb/>
              occurrendo verò mi­
                <lb/>
              nùs forti, tantum
                <lb/>
              amittat, quantum in
                <lb/>
              illud transfert. </s>
            </p>
            <p type="margin">
              <s>
                <margin.target id="marg475"/>
              5</s>
            </p>
            <p type="margin">
              <s>
                <margin.target id="marg476"/>
              10</s>
            </p>
            <p type="margin">
              <s>
                <margin.target id="marg477"/>
              15</s>
            </p>
            <p type="main">
              <s>
                <arrow.to.target n="marg478"/>
                <lb/>
                <arrow.to.target n="marg479"/>
              Demoniſtratur autem prior pars hujus legis, ex eo
                <lb/>
              quòd differentia ſit inter motum in ſe ſpectatum &
                <lb/>
              ipſius determinationem verſus certam partem, quâ ſit
                <lb/>
              ut iſta determinatio poſſit mutari, motu integro rema­
                <lb/>
              nente. </s>
              <s>Cúm enim, ut antè dictum eſt, unaquaeque res,
                <lb/>
                <arrow.to.target n="marg480"/>
              non compoſita, ſed ſimplex, qualis eſt motus, ſemper
                <lb/>
              eſſe perſeveret, quamdiu à nullâ cauſà externâ deſtrui­
                <lb/>
              tur; & in occurſu duri corporis, appareat quidem cauſa
                <lb/>
              quae impediat, ne motus alterius corporis, cui occur­
                <lb/>
              rit, maneat determinatus verſus eandem partem; non </s>
            </p>
          </chap>
        </body>
      </text>
    </archimedes>
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