Voltaire, Elémens de la philosophie de Neuton : mis à la portée de tout le monde

Table of Notes

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              <pb o="24" file="0036" n="36" rhead="DE LA PHILOSOPHIE"/>
            des hommes qui ne parloient que de véritê
              <lb/>
            n’ayent écrit que des Romans!</s>
          </p>
          <p>
            <s xml:id="echoid-s301" xml:space="preserve">Qu’eſt-ce donc enfin que la lumiere? </s>
            <s xml:id="echoid-s302" xml:space="preserve">C’eſt
              <lb/>
              <note position="left" xlink:label="note-0036-01" xlink:href="note-0036-01a" xml:space="preserve">Déſini-
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              tion de
                <lb/>
              la lu-
                <lb/>
              miere.</note>
            le feu lui-même, lequel brûle à une petite diſ-
              <lb/>
            tance, lorſque ſes parties ſont moins tenuës,
              <lb/>
            ou plus rapides, ou plus réunies; </s>
            <s xml:id="echoid-s303" xml:space="preserve">& </s>
            <s xml:id="echoid-s304" xml:space="preserve">qui
              <lb/>
            éclaire doucement nos yeux, quand il agit
              <lb/>
            de plus loin, quand ſes particules ſont plus fi-
              <lb/>
            nes, & </s>
            <s xml:id="echoid-s305" xml:space="preserve">moins rapides, & </s>
            <s xml:id="echoid-s306" xml:space="preserve">moins réunies.</s>
            <s xml:id="echoid-s307" xml:space="preserve"/>
          </p>
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            <s xml:id="echoid-s308" xml:space="preserve">Ainſi une bougie allumée brûleroit l’œil
              <lb/>
            qui ne ſeroit qu’à quelques lignes d’elle, & </s>
            <s xml:id="echoid-s309" xml:space="preserve">
              <lb/>
            éclaire l’œil qui en eſt à quelques pouces.
              <lb/>
            </s>
            <s xml:id="echoid-s310" xml:space="preserve">Ainſi les rayons du Soleil, épars dans l’eſpace
              <lb/>
            de l’air, illuminent les objets, & </s>
            <s xml:id="echoid-s311" xml:space="preserve">réunis dans
              <lb/>
            un verre ardent fondent le plomb & </s>
            <s xml:id="echoid-s312" xml:space="preserve">l’or.</s>
            <s xml:id="echoid-s313" xml:space="preserve"/>
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            <s xml:id="echoid-s314" xml:space="preserve">Ce feu eſt dardé en tout ſens du point
              <lb/>
            rayonnant: </s>
            <s xml:id="echoid-s315" xml:space="preserve">c’eſt ce qui fait qu’il eſt apper-
              <lb/>
            çu de tous les côtez; </s>
            <s xml:id="echoid-s316" xml:space="preserve">il faut donc toujours
              <lb/>
            le conſidérer comme des lignes partant d’un
              <lb/>
            centre à la circonférence. </s>
            <s xml:id="echoid-s317" xml:space="preserve">Ainſi tout faiſ-
              <lb/>
            ceau, tout amas, tout trait de rayons, ve-
              <lb/>
            nant du Soleil ou d’un feu quelconque, doit
              <lb/>
            être conſidéré comme un cone, dont la baſe
              <lb/>
            eſt ſur notre prunelle, & </s>
            <s xml:id="echoid-s318" xml:space="preserve">dont la pointe eſt
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            dans le feu qui le darde.</s>
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